path: root/src/main.cpp

extern "C" {
#include "../include/capture/nvfbc.h"
#include "../include/capture/xcomposite.h"
#include "../include/capture/kms.h"
#ifdef GSR_PORTAL
#include "../include/capture/portal.h"
#include "../include/dbus.h"
#endif
#ifdef GSR_APP_AUDIO
#include "../include/pipewire_audio.h"
#endif
#include "../include/encoder/video/nvenc.h"
#include "../include/encoder/video/vaapi.h"
#include "../include/encoder/video/vulkan.h"
#include "../include/encoder/video/software.h"
#include "../include/codec_query/nvenc.h"
#include "../include/codec_query/vaapi.h"
#include "../include/codec_query/vulkan.h"
#include "../include/window/window_x11.h"
#include "../include/window/window_wayland.h"
#include "../include/egl.h"
#include "../include/utils.h"
#include "../include/damage.h"
#include "../include/color_conversion.h"
}

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string>
#include <vector>
#include <unordered_map>
#include <thread>
#include <mutex>
#include <map>
#include <signal.h>
#include <sys/stat.h>
#include <unistd.h>
#include <sys/wait.h>
#include <inttypes.h>
#include <libgen.h>

#include "../include/sound.hpp"

extern "C" {
#include <libavutil/pixfmt.h>
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavutil/opt.h>
#include <libswresample/swresample.h>
#include <libavutil/avutil.h>
#include <libavutil/time.h>
#include <libavutil/mastering_display_metadata.h>
#include <libavfilter/avfilter.h>
#include <libavfilter/buffersink.h>
#include <libavfilter/buffersrc.h>
}

#include <deque>
#include <future>

#ifndef GSR_VERSION
#define GSR_VERSION "unknown"
#endif

// TODO: If options are not supported then they are returned (allocated) in the options. This should be free'd.

// TODO: Remove LIBAVUTIL_VERSION_MAJOR checks in the future when ubuntu, pop os LTS etc update ffmpeg to >= 5.0

static const int AUDIO_SAMPLE_RATE = 48000;

static const int VIDEO_STREAM_INDEX = 0;

static thread_local char av_error_buffer[AV_ERROR_MAX_STRING_SIZE];

static void monitor_output_callback_print(const gsr_monitor *monitor, void *userdata) {
    (void)userdata;
    fprintf(stderr, "    \"%.*s\"    (%dx%d+%d+%d)\n", monitor->name_len, monitor->name, monitor->size.x, monitor->size.y, monitor->pos.x, monitor->pos.y);
}

typedef struct {
    const char *output_name;
} FirstOutputCallback;

static void get_first_output(const gsr_monitor *monitor, void *userdata) {
    FirstOutputCallback *first_output = (FirstOutputCallback*)userdata;
    if(!first_output->output_name)
        first_output->output_name = strndup(monitor->name, monitor->name_len + 1);
}

static char* av_error_to_string(int err) {
    if(av_strerror(err, av_error_buffer, sizeof(av_error_buffer)) < 0)
        strcpy(av_error_buffer, "Unknown error");
    return av_error_buffer;
}

enum class VideoQuality {
    MEDIUM,
    HIGH,
    VERY_HIGH,
    ULTRA
};

enum class VideoCodec {
    H264,
    HEVC,
    HEVC_HDR,
    HEVC_10BIT,
    AV1,
    AV1_HDR,
    AV1_10BIT,
    VP8,
    VP9,
    H264_VULKAN,
    HEVC_VULKAN
};

enum class AudioCodec {
    AAC,
    OPUS,
    FLAC
};

enum class PixelFormat {
    YUV420,
    YUV444
};

enum class FramerateMode {
    CONSTANT,
    VARIABLE,
    CONTENT
};

enum class BitrateMode {
    QP,
    VBR,
    CBR
};

static int x11_error_handler(Display*, XErrorEvent*) {
    return 0;
}

static int x11_io_error_handler(Display*) {
    return 0;
}

static bool video_codec_is_hdr(VideoCodec video_codec) {
    // TODO: Vulkan
    switch(video_codec) {
        case VideoCodec::HEVC_HDR:
        case VideoCodec::AV1_HDR:
            return true;
        default:
            return false;
    }
}

static VideoCodec hdr_video_codec_to_sdr_video_codec(VideoCodec video_codec) {
    // TODO: Vulkan
    switch(video_codec) {
        case VideoCodec::HEVC_HDR:
            return VideoCodec::HEVC;
        case VideoCodec::AV1_HDR:
            return VideoCodec::AV1;
        default:
            return video_codec;
    }
}

static gsr_color_depth video_codec_to_bit_depth(VideoCodec video_codec) {
    // TODO: Vulkan
    switch(video_codec) {
        case VideoCodec::HEVC_HDR:
        case VideoCodec::HEVC_10BIT:
        case VideoCodec::AV1_HDR:
        case VideoCodec::AV1_10BIT:
            return GSR_COLOR_DEPTH_10_BITS;
        default:
            return GSR_COLOR_DEPTH_8_BITS;
    }
}

// static bool video_codec_is_hevc(VideoCodec video_codec) {
// TODO: Vulkan
//     switch(video_codec) {
//         case VideoCodec::HEVC:
//         case VideoCodec::HEVC_HDR:
//         case VideoCodec::HEVC_10BIT:
//             return true;
//         default:
//             return false;
//     }
// }

static bool video_codec_is_av1(VideoCodec video_codec) {
    // TODO: Vulkan
    switch(video_codec) {
        case VideoCodec::AV1:
        case VideoCodec::AV1_HDR:
        case VideoCodec::AV1_10BIT:
            return true;
        default:
            return false;
    }
}

static bool video_codec_is_vulkan(VideoCodec video_codec) {
    switch(video_codec) {
        case VideoCodec::H264_VULKAN:
        case VideoCodec::HEVC_VULKAN:
            return true;
        default:
            return false;
    }
}

struct PacketData {
    PacketData() {}
    PacketData(const PacketData&) = delete;
    PacketData& operator=(const PacketData&) = delete;

    ~PacketData() {
        av_free(data.data);
    }

    AVPacket data;
};

// |stream| is only required for non-replay mode
static void receive_frames(AVCodecContext *av_codec_context, int stream_index, AVStream *stream, int64_t pts,
                           AVFormatContext *av_format_context,
                           double replay_start_time,
                           std::deque<std::shared_ptr<PacketData>> &frame_data_queue,
                           int replay_buffer_size_secs,
                           bool &frames_erased,
                           std::mutex &write_output_mutex,
                           double paused_time_offset) {
    for (;;) {
        AVPacket *av_packet = av_packet_alloc();
        if(!av_packet)
            break;

        av_packet->data = NULL;
        av_packet->size = 0;
        int res = avcodec_receive_packet(av_codec_context, av_packet);
        if (res == 0) { // we have a packet, send the packet to the muxer
            av_packet->stream_index = stream_index;
            av_packet->pts = pts;
            av_packet->dts = pts;

            std::lock_guard<std::mutex> lock(write_output_mutex);
            if(replay_buffer_size_secs != -1) {
                // TODO: Preallocate all frames data and use those instead.
                // Why are we doing this you ask? there is a new ffmpeg bug that causes cpu usage to increase over time when you have
                // packets that are not being free'd until later. So we copy the packet data, free the packet and then reconstruct
                // the packet later on when we need it, to keep packets alive only for a short period.
                auto new_packet = std::make_shared<PacketData>();
                new_packet->data = *av_packet;
                new_packet->data.data = (uint8_t*)av_malloc(av_packet->size);
                memcpy(new_packet->data.data, av_packet->data, av_packet->size);

                double time_now = clock_get_monotonic_seconds() - paused_time_offset;
                double replay_time_elapsed = time_now - replay_start_time;

                frame_data_queue.push_back(std::move(new_packet));
                if(replay_time_elapsed >= replay_buffer_size_secs) {
                    frame_data_queue.pop_front();
                    frames_erased = true;
                }
            } else {
                av_packet_rescale_ts(av_packet, av_codec_context->time_base, stream->time_base);
                av_packet->stream_index = stream->index;
                // TODO: Is av_interleaved_write_frame needed?. Answer: might be needed for mkv but dont use it! it causes frames to be inconsistent, skipping frames and duplicating frames
                int ret = av_write_frame(av_format_context, av_packet);
                if(ret < 0) {
                    fprintf(stderr, "Error: Failed to write frame index %d to muxer, reason: %s (%d)\n", av_packet->stream_index, av_error_to_string(ret), ret);
                }
            }
            av_packet_free(&av_packet);
        } else if (res == AVERROR(EAGAIN)) { // we have no packet
                                             // fprintf(stderr, "No packet!\n");
            av_packet_free(&av_packet);
            break;
        } else if (res == AVERROR_EOF) { // this is the end of the stream
            av_packet_free(&av_packet);
            fprintf(stderr, "End of stream!\n");
            break;
        } else {
            av_packet_free(&av_packet);
            fprintf(stderr, "Unexpected error: %d\n", res);
            break;
        }
    }
}

static const char* audio_codec_get_name(AudioCodec audio_codec) {
    switch(audio_codec) {
        case AudioCodec::AAC:  return "aac";
        case AudioCodec::OPUS: return "opus";
        case AudioCodec::FLAC: return "flac";
    }
    assert(false);
    return "";
}

static AVCodecID audio_codec_get_id(AudioCodec audio_codec) {
    switch(audio_codec) {
        case AudioCodec::AAC:  return AV_CODEC_ID_AAC;
        case AudioCodec::OPUS: return AV_CODEC_ID_OPUS;
        case AudioCodec::FLAC: return AV_CODEC_ID_FLAC;
    }
    assert(false);
    return AV_CODEC_ID_AAC;
}

static AVSampleFormat audio_codec_get_sample_format(AVCodecContext *audio_codec_context, AudioCodec audio_codec, const AVCodec *codec, bool mix_audio) {
    (void)audio_codec_context;
    switch(audio_codec) {
        case AudioCodec::AAC: {
            return AV_SAMPLE_FMT_FLTP;
        }
        case AudioCodec::OPUS: {
            bool supports_s16 = false;
            bool supports_flt = false;

            #if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(61, 15, 0)
            for(size_t i = 0; codec->sample_fmts && codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; ++i) {
                if(codec->sample_fmts[i] == AV_SAMPLE_FMT_S16) {
                    supports_s16 = true;
                } else if(codec->sample_fmts[i] == AV_SAMPLE_FMT_FLT) {
                    supports_flt = true;
                }
            }
            #else
            const enum AVSampleFormat *sample_fmts = NULL;
            if(avcodec_get_supported_config(audio_codec_context, codec, AV_CODEC_CONFIG_SAMPLE_FORMAT, 0, (const void**)&sample_fmts, NULL) >= 0) {
                if(sample_fmts) {
                    for(size_t i = 0; sample_fmts[i] != AV_SAMPLE_FMT_NONE; ++i) {
                        if(sample_fmts[i] == AV_SAMPLE_FMT_S16) {
                            supports_s16 = true;
                        } else if(sample_fmts[i] == AV_SAMPLE_FMT_FLT) {
                            supports_flt = true;
                        }
                    }
                } else {
                    // What a dumb API. It returns NULL if all formats are supported
                    supports_s16 = true;
                    supports_flt = true;
                }
            }
            #endif

            // Amix only works with float audio
            if(mix_audio)
                supports_s16 = false;

            if(!supports_s16 && !supports_flt) {
                fprintf(stderr, "Warning: opus audio codec is chosen but your ffmpeg version does not support s16/flt sample format and performance might be slightly worse.\n");
                fprintf(stderr, "  You can either rebuild ffmpeg with libopus instead of the built-in opus, use the flatpak version of gpu screen recorder or record with aac audio codec instead (-ac aac).\n");
                fprintf(stderr, "  Falling back to fltp audio sample format instead.\n");
            }

            if(supports_s16)
                return AV_SAMPLE_FMT_S16;
            else if(supports_flt)
                return AV_SAMPLE_FMT_FLT;
            else
                return AV_SAMPLE_FMT_FLTP;
        }
        case AudioCodec::FLAC: {
            return AV_SAMPLE_FMT_S32;
        }
    }
    assert(false);
    return AV_SAMPLE_FMT_FLTP;
}

static int64_t audio_codec_get_get_bitrate(AudioCodec audio_codec) {
    switch(audio_codec) {
        case AudioCodec::AAC:  return 160000;
        case AudioCodec::OPUS: return 128000;
        case AudioCodec::FLAC: return 128000;
    }
    assert(false);
    return 128000;
}

static AudioFormat audio_codec_context_get_audio_format(const AVCodecContext *audio_codec_context) {
    switch(audio_codec_context->sample_fmt) {
        case AV_SAMPLE_FMT_FLT:   return F32;
        case AV_SAMPLE_FMT_FLTP:  return S32;
        case AV_SAMPLE_FMT_S16:   return S16;
        case AV_SAMPLE_FMT_S32:   return S32;
        default:                  return S16;
    }
}

static AVSampleFormat audio_format_to_sample_format(const AudioFormat audio_format) {
    switch(audio_format) {
        case S16:   return AV_SAMPLE_FMT_S16;
        case S32:   return AV_SAMPLE_FMT_S32;
        case F32:   return AV_SAMPLE_FMT_FLT;
    }
    assert(false);
    return AV_SAMPLE_FMT_S16;
}

static AVCodecContext* create_audio_codec_context(int fps, AudioCodec audio_codec, bool mix_audio, int64_t audio_bitrate) {
    (void)fps;
    const AVCodec *codec = avcodec_find_encoder(audio_codec_get_id(audio_codec));
    if (!codec) {
        fprintf(stderr, "Error: Could not find %s audio encoder\n", audio_codec_get_name(audio_codec));
        _exit(1);
    }

    AVCodecContext *codec_context = avcodec_alloc_context3(codec);

    assert(codec->type == AVMEDIA_TYPE_AUDIO);
    codec_context->codec_id = codec->id;
    codec_context->sample_fmt = audio_codec_get_sample_format(codec_context, audio_codec, codec, mix_audio);
    codec_context->bit_rate = audio_bitrate == 0 ? audio_codec_get_get_bitrate(audio_codec) : audio_bitrate;
    codec_context->sample_rate = AUDIO_SAMPLE_RATE;
    if(audio_codec == AudioCodec::AAC)
        codec_context->profile = FF_PROFILE_AAC_LOW;
#if LIBAVCODEC_VERSION_MAJOR < 60
    codec_context->channel_layout = AV_CH_LAYOUT_STEREO;
    codec_context->channels = 2;
#else
    av_channel_layout_default(&codec_context->ch_layout, 2);
#endif

    codec_context->time_base.num = 1;
    codec_context->time_base.den = codec_context->sample_rate;
    codec_context->thread_count = 1;
    codec_context->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;

    return codec_context;
}

static int vbr_get_quality_parameter(AVCodecContext *codec_context, VideoQuality video_quality, bool hdr) {
    // 8 bit / 10 bit = 80%
    const float qp_multiply = hdr ? 8.0f/10.0f : 1.0f;
    if(codec_context->codec_id == AV_CODEC_ID_AV1) {
        switch(video_quality) {
            case VideoQuality::MEDIUM:
                return 160 * qp_multiply;
            case VideoQuality::HIGH:
                return 130 * qp_multiply;
            case VideoQuality::VERY_HIGH:
                return 110 * qp_multiply;
            case VideoQuality::ULTRA:
                return 90 * qp_multiply;
        }
    } else if(codec_context->codec_id == AV_CODEC_ID_H264) {
        switch(video_quality) {
            case VideoQuality::MEDIUM:
                return 35 * qp_multiply;
            case VideoQuality::HIGH:
                return 30 * qp_multiply;
            case VideoQuality::VERY_HIGH:
                return 25 * qp_multiply;
            case VideoQuality::ULTRA:
                return 22 * qp_multiply;
        }
    } else if(codec_context->codec_id == AV_CODEC_ID_HEVC) {
        switch(video_quality) {
            case VideoQuality::MEDIUM:
                return 35 * qp_multiply;
            case VideoQuality::HIGH:
                return 30 * qp_multiply;
            case VideoQuality::VERY_HIGH:
                return 25 * qp_multiply;
            case VideoQuality::ULTRA:
                return 22 * qp_multiply;
        }
    } else if(codec_context->codec_id == AV_CODEC_ID_VP8 || codec_context->codec_id == AV_CODEC_ID_VP9) {
        switch(video_quality) {
            case VideoQuality::MEDIUM:
                return 35 * qp_multiply;
            case VideoQuality::HIGH:
                return 30 * qp_multiply;
            case VideoQuality::VERY_HIGH:
                return 25 * qp_multiply;
            case VideoQuality::ULTRA:
                return 22 * qp_multiply;
        }
    }
    assert(false);
    return 22 * qp_multiply;
}

static AVCodecContext *create_video_codec_context(AVPixelFormat pix_fmt,
                            VideoQuality video_quality,
                            int fps, const AVCodec *codec, bool low_latency, gsr_gpu_vendor vendor, FramerateMode framerate_mode,
                            bool hdr, gsr_color_range color_range, float keyint, bool use_software_video_encoder, BitrateMode bitrate_mode, VideoCodec video_codec, int64_t bitrate) {

    AVCodecContext *codec_context = avcodec_alloc_context3(codec);

    //double fps_ratio = (double)fps / 30.0;

    assert(codec->type == AVMEDIA_TYPE_VIDEO);
    codec_context->codec_id = codec->id;
    // Timebase: This is the fundamental unit of time (in seconds) in terms
    // of which frame timestamps are represented. For fixed-fps content,
    // timebase should be 1/framerate and timestamp increments should be
    // identical to 1
    codec_context->time_base.num = 1;
    codec_context->time_base.den = framerate_mode == FramerateMode::CONSTANT ? fps : AV_TIME_BASE;
    codec_context->framerate.num = fps;
    codec_context->framerate.den = 1;
    codec_context->sample_aspect_ratio.num = 0;
    codec_context->sample_aspect_ratio.den = 0;
    if(low_latency) {
        codec_context->flags |= (AV_CODEC_FLAG_CLOSED_GOP | AV_CODEC_FLAG_LOW_DELAY);
        codec_context->flags2 |= AV_CODEC_FLAG2_FAST;
        //codec_context->gop_size = std::numeric_limits<int>::max();
        //codec_context->keyint_min = std::numeric_limits<int>::max();
        codec_context->gop_size = fps * keyint;
    } else {
        // High values reduce file size but increases time it takes to seek
        codec_context->gop_size = fps * keyint;
    }
    codec_context->max_b_frames = 0;
    codec_context->pix_fmt = pix_fmt;
    codec_context->color_range = color_range == GSR_COLOR_RANGE_LIMITED ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
    if(hdr) {
        codec_context->color_primaries = AVCOL_PRI_BT2020;
        codec_context->color_trc = AVCOL_TRC_SMPTE2084;
        codec_context->colorspace = AVCOL_SPC_BT2020_NCL;
    } else {
        codec_context->color_primaries = AVCOL_PRI_BT709;
        codec_context->color_trc = AVCOL_TRC_BT709;
        codec_context->colorspace = AVCOL_SPC_BT709;
    }
    //codec_context->chroma_sample_location = AVCHROMA_LOC_CENTER;
    if(codec->id == AV_CODEC_ID_HEVC)
        codec_context->codec_tag = MKTAG('h', 'v', 'c', '1'); // QuickTime on MacOS requires this or the video wont be playable

    if(bitrate_mode == BitrateMode::CBR) {
        codec_context->bit_rate = bitrate;
        codec_context->rc_max_rate = codec_context->bit_rate;
        //codec_context->rc_min_rate = codec_context->bit_rate;
        codec_context->rc_buffer_size = codec_context->bit_rate;//codec_context->bit_rate / 10;
        codec_context->rc_initial_buffer_occupancy = 0;//codec_context->bit_rate;//codec_context->bit_rate * 1000;
    } else if(bitrate_mode == BitrateMode::VBR) {
        const int quality = vbr_get_quality_parameter(codec_context, video_quality, hdr);
        switch(video_quality) {
            case VideoQuality::MEDIUM:
                codec_context->qmin = quality;
                codec_context->qmax = quality;
                codec_context->bit_rate = 100000;//4500000 + (codec_context->width * codec_context->height)*0.75;
                break;
            case VideoQuality::HIGH:
                codec_context->qmin = quality;
                codec_context->qmax = quality;
                codec_context->bit_rate = 100000;//10000000-9000000 + (codec_context->width * codec_context->height)*0.75;
                break;
            case VideoQuality::VERY_HIGH:
                codec_context->qmin = quality;
                codec_context->qmax = quality;
                codec_context->bit_rate = 100000;//10000000-9000000 + (codec_context->width * codec_context->height)*0.75;
                break;
            case VideoQuality::ULTRA:
                codec_context->qmin = quality;
                codec_context->qmax = quality;
                codec_context->bit_rate = 100000;//10000000-9000000 + (codec_context->width * codec_context->height)*0.75;
                break;
        }

        codec_context->rc_max_rate = codec_context->bit_rate;
        //codec_context->rc_min_rate = codec_context->bit_rate;
        codec_context->rc_buffer_size = codec_context->bit_rate;//codec_context->bit_rate / 10;
        codec_context->rc_initial_buffer_occupancy = codec_context->bit_rate;//codec_context->bit_rate * 1000;
    } else {
        //codec_context->rc_buffer_size = 50000 * 1000;
    }
    //codec_context->profile = FF_PROFILE_H264_MAIN;
    if (codec_context->codec_id == AV_CODEC_ID_MPEG1VIDEO)
        codec_context->mb_decision = 2;

    if(!use_software_video_encoder && vendor != GSR_GPU_VENDOR_NVIDIA && bitrate_mode != BitrateMode::CBR) {
        // 8 bit / 10 bit = 80%, and increase it even more
        const float quality_multiply = hdr ? (8.0f/10.0f * 0.7f) : 1.0f;
        if(codec_context->codec_id == AV_CODEC_ID_AV1 || codec_context->codec_id == AV_CODEC_ID_H264 || codec_context->codec_id == AV_CODEC_ID_HEVC) {
            switch(video_quality) {
                case VideoQuality::MEDIUM:
                    codec_context->global_quality = 150 * quality_multiply;
                    break;
                case VideoQuality::HIGH:
                    codec_context->global_quality = 120 * quality_multiply;
                    break;
                case VideoQuality::VERY_HIGH:
                    codec_context->global_quality = 115 * quality_multiply;
                    break;
                case VideoQuality::ULTRA:
                    codec_context->global_quality = 90 * quality_multiply;
                    break;
            }
        } else if(codec_context->codec_id == AV_CODEC_ID_VP8) {
            switch(video_quality) {
                case VideoQuality::MEDIUM:
                    codec_context->global_quality = 35 * quality_multiply;
                    break;
                case VideoQuality::HIGH:
                    codec_context->global_quality = 30 * quality_multiply;
                    break;
                case VideoQuality::VERY_HIGH:
                    codec_context->global_quality = 25 * quality_multiply;
                    break;
                case VideoQuality::ULTRA:
                    codec_context->global_quality = 10 * quality_multiply;
                    break;
            }
        } else if(codec_context->codec_id == AV_CODEC_ID_VP9) {
            switch(video_quality) {
                case VideoQuality::MEDIUM:
                    codec_context->global_quality = 35 * quality_multiply;
                    break;
                case VideoQuality::HIGH:
                    codec_context->global_quality = 30 * quality_multiply;
                    break;
                case VideoQuality::VERY_HIGH:
                    codec_context->global_quality = 25 * quality_multiply;
                    break;
                case VideoQuality::ULTRA:
                    codec_context->global_quality = 10 * quality_multiply;
                    break;
            }
        }
    }

    av_opt_set_int(codec_context->priv_data, "b_ref_mode", 0, 0);
    //av_opt_set_int(codec_context->priv_data, "cbr", true, 0);

    if(vendor != GSR_GPU_VENDOR_NVIDIA) {
        // TODO: More options, better options
        //codec_context->bit_rate = codec_context->width * codec_context->height;
        switch(bitrate_mode) {
            case BitrateMode::QP: {
                if(video_codec_is_vulkan(video_codec))
                    av_opt_set(codec_context->priv_data, "rc_mode", "cqp", 0);
                else if(vendor == GSR_GPU_VENDOR_NVIDIA)
                    av_opt_set(codec_context->priv_data, "rc", "constqp", 0);
                else
                    av_opt_set(codec_context->priv_data, "rc_mode", "CQP", 0);
                break;
            }
            case BitrateMode::VBR: {
                if(video_codec_is_vulkan(video_codec))
                    av_opt_set(codec_context->priv_data, "rc_mode", "vbr", 0);
                else if(vendor == GSR_GPU_VENDOR_NVIDIA)
                    av_opt_set(codec_context->priv_data, "rc", "vbr", 0);
                else
                    av_opt_set(codec_context->priv_data, "rc_mode", "VBR", 0);
                break;
            }
            case BitrateMode::CBR: {
                if(video_codec_is_vulkan(video_codec))
                    av_opt_set(codec_context->priv_data, "rc_mode", "cbr", 0);
                else if(vendor == GSR_GPU_VENDOR_NVIDIA)
                    av_opt_set(codec_context->priv_data, "rc", "cbr", 0);
                else
                    av_opt_set(codec_context->priv_data, "rc_mode", "CBR", 0);
                break;
            }
        }
        //codec_context->global_quality = 4;
        //codec_context->compression_level = 2;
    }

    //av_opt_set(codec_context->priv_data, "bsf", "hevc_metadata=colour_primaries=9:transfer_characteristics=16:matrix_coefficients=9", 0);

    codec_context->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;

    return codec_context;
}

static void open_audio(AVCodecContext *audio_codec_context) {
    AVDictionary *options = nullptr;
    av_dict_set(&options, "strict", "experimental", 0);

    int ret;
    ret = avcodec_open2(audio_codec_context, audio_codec_context->codec, &options);
    if(ret < 0) {
        fprintf(stderr, "failed to open codec, reason: %s\n", av_error_to_string(ret));
        _exit(1);
    }
}

static AVFrame* create_audio_frame(AVCodecContext *audio_codec_context) {
    AVFrame *frame = av_frame_alloc();
    if(!frame) {
        fprintf(stderr, "failed to allocate audio frame\n");
        _exit(1);
    }

    frame->sample_rate = audio_codec_context->sample_rate;
    frame->nb_samples = audio_codec_context->frame_size;
    frame->format = audio_codec_context->sample_fmt;
#if LIBAVCODEC_VERSION_MAJOR < 60
    frame->channels = audio_codec_context->channels;
    frame->channel_layout = audio_codec_context->channel_layout;
#else
    av_channel_layout_copy(&frame->ch_layout, &audio_codec_context->ch_layout);
#endif

    int ret = av_frame_get_buffer(frame, 0);
    if(ret < 0) {
        fprintf(stderr, "failed to allocate audio data buffers, reason: %s\n", av_error_to_string(ret));
        _exit(1);
    }

    return frame;
}

static void dict_set_profile(AVCodecContext *codec_context, gsr_gpu_vendor vendor, gsr_color_depth color_depth, AVDictionary **options) {
    #if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(61, 17, 100)
    if(codec_context->codec_id == AV_CODEC_ID_H264) {
        // TODO: Only for vaapi
        //if(color_depth == GSR_COLOR_DEPTH_10_BITS)
        //    av_dict_set(options, "profile", "high10", 0);
        //else
        av_dict_set(options, "profile", "high", 0);
    } else if(codec_context->codec_id == AV_CODEC_ID_AV1) {
        if(vendor == GSR_GPU_VENDOR_NVIDIA) {
            if(color_depth == GSR_COLOR_DEPTH_10_BITS)
                av_dict_set_int(options, "highbitdepth", 1, 0);
        } else {
            av_dict_set(options, "profile", "main", 0); // TODO: use professional instead?
        }
    } else if(codec_context->codec_id == AV_CODEC_ID_HEVC) {
        if(color_depth == GSR_COLOR_DEPTH_10_BITS)
            av_dict_set(options, "profile", "main10", 0);
        else
            av_dict_set(options, "profile", "main", 0);
    }
    #else
    if(codec_context->codec_id == AV_CODEC_ID_H264) {
        // TODO: Only for vaapi
        //if(color_depth == GSR_COLOR_DEPTH_10_BITS)
        //    av_dict_set_int(options, "profile", AV_PROFILE_H264_HIGH_10, 0);
        //else
        av_dict_set_int(options, "profile", AV_PROFILE_H264_HIGH, 0);
    } else if(codec_context->codec_id == AV_CODEC_ID_AV1) {
        if(vendor == GSR_GPU_VENDOR_NVIDIA) {
            if(color_depth == GSR_COLOR_DEPTH_10_BITS)
                av_dict_set_int(options, "highbitdepth", 1, 0);
        } else {
            av_dict_set_int(options, "profile", AV_PROFILE_AV1_MAIN, 0); // TODO: use professional instead?
        }
    } else if(codec_context->codec_id == AV_CODEC_ID_HEVC) {
        if(color_depth == GSR_COLOR_DEPTH_10_BITS)
            av_dict_set_int(options, "profile", AV_PROFILE_HEVC_MAIN_10, 0);
        else
            av_dict_set_int(options, "profile", AV_PROFILE_HEVC_MAIN, 0);
    }
    #endif
}

static void video_software_set_qp(AVCodecContext *codec_context, VideoQuality video_quality, bool hdr, AVDictionary **options) {
    // 8 bit / 10 bit = 80%
    const float qp_multiply = hdr ? 8.0f/10.0f : 1.0f;
    if(codec_context->codec_id == AV_CODEC_ID_AV1) {
        switch(video_quality) {
            case VideoQuality::MEDIUM:
                av_dict_set_int(options, "qp", 35 * qp_multiply, 0);
                break;
            case VideoQuality::HIGH:
                av_dict_set_int(options, "qp", 30 * qp_multiply, 0);
                break;
            case VideoQuality::VERY_HIGH:
                av_dict_set_int(options, "qp", 25 * qp_multiply, 0);
                break;
            case VideoQuality::ULTRA:
                av_dict_set_int(options, "qp", 22 * qp_multiply, 0);
                break;
        }
    } else if(codec_context->codec_id == AV_CODEC_ID_H264) {
        switch(video_quality) {
            case VideoQuality::MEDIUM:
                av_dict_set_int(options, "qp", 34 * qp_multiply, 0);
                break;
            case VideoQuality::HIGH:
                av_dict_set_int(options, "qp", 30 * qp_multiply, 0);
                break;
            case VideoQuality::VERY_HIGH:
                av_dict_set_int(options, "qp", 25 * qp_multiply, 0);
                break;
            case VideoQuality::ULTRA:
                av_dict_set_int(options, "qp", 22 * qp_multiply, 0);
                break;
        }
    } else {
        switch(video_quality) {
            case VideoQuality::MEDIUM:
                av_dict_set_int(options, "qp", 35 * qp_multiply, 0);
                break;
            case VideoQuality::HIGH:
                av_dict_set_int(options, "qp", 30 * qp_multiply, 0);
                break;
            case VideoQuality::VERY_HIGH:
                av_dict_set_int(options, "qp", 25 * qp_multiply, 0);
                break;
            case VideoQuality::ULTRA:
                av_dict_set_int(options, "qp", 22 * qp_multiply, 0);
                break;
        }
    }
}

static void open_video_software(AVCodecContext *codec_context, VideoQuality video_quality, PixelFormat pixel_format, bool hdr, gsr_color_depth color_depth, BitrateMode bitrate_mode) {
    (void)pixel_format; // TODO:
    AVDictionary *options = nullptr;

    if(bitrate_mode == BitrateMode::QP)
        video_software_set_qp(codec_context, video_quality, hdr, &options);

    av_dict_set(&options, "preset", "veryfast", 0);
    av_dict_set(&options, "tune", "film", 0);
    dict_set_profile(codec_context, GSR_GPU_VENDOR_INTEL, color_depth, &options);

    if(codec_context->codec_id == AV_CODEC_ID_H264) {
        av_dict_set(&options, "coder", "cabac", 0); // TODO: cavlc is faster than cabac but worse compression. Which to use?
    }

    av_dict_set(&options, "strict", "experimental", 0);

    int ret = avcodec_open2(codec_context, codec_context->codec, &options);
    if (ret < 0) {
        fprintf(stderr, "Error: Could not open video codec: %s\n", av_error_to_string(ret));
        _exit(1);
    }
}

static void video_set_rc(VideoCodec video_codec, gsr_gpu_vendor vendor, BitrateMode bitrate_mode, AVDictionary **options) {
    switch(bitrate_mode) {
        case BitrateMode::QP: {
            if(video_codec_is_vulkan(video_codec))
                av_dict_set(options, "rc_mode", "cqp", 0);
            else if(vendor == GSR_GPU_VENDOR_NVIDIA)
                av_dict_set(options, "rc", "constqp", 0);
            else
                av_dict_set(options, "rc_mode", "CQP", 0);
            break;
        }
        case BitrateMode::VBR: {
            if(video_codec_is_vulkan(video_codec))
                av_dict_set(options, "rc_mode", "vbr", 0);
            else if(vendor == GSR_GPU_VENDOR_NVIDIA)
                av_dict_set(options, "rc", "vbr", 0);
            else
                av_dict_set(options, "rc_mode", "VBR", 0);
            break;
        }
        case BitrateMode::CBR: {
            if(video_codec_is_vulkan(video_codec))
                av_dict_set(options, "rc_mode", "cbr", 0);
            else if(vendor == GSR_GPU_VENDOR_NVIDIA)
                av_dict_set(options, "rc", "cbr", 0);
            else
                av_dict_set(options, "rc_mode", "CBR", 0);
            break;
        }
    }
}

static void video_hardware_set_qp(AVCodecContext *codec_context, VideoQuality video_quality, gsr_gpu_vendor vendor, bool hdr, AVDictionary **options) {
    // 8 bit / 10 bit = 80%
    const float qp_multiply = hdr ? 8.0f/10.0f : 1.0f;
    if(vendor == GSR_GPU_VENDOR_NVIDIA) {
        // TODO: Test if these should be in the same range as vaapi
        if(codec_context->codec_id == AV_CODEC_ID_AV1) {
            switch(video_quality) {
                case VideoQuality::MEDIUM:
                    av_dict_set_int(options, "qp", 35 * qp_multiply, 0);
                    break;
                case VideoQuality::HIGH:
                    av_dict_set_int(options, "qp", 30 * qp_multiply, 0);
                    break;
                case VideoQuality::VERY_HIGH:
                    av_dict_set_int(options, "qp", 27 * qp_multiply, 0);
                    break;
                case VideoQuality::ULTRA:
                    av_dict_set_int(options, "qp", 22 * qp_multiply, 0);
                    break;
            }
        } else if(codec_context->codec_id == AV_CODEC_ID_H264) {
            switch(video_quality) {
                case VideoQuality::MEDIUM:
                    av_dict_set_int(options, "qp", 35 * qp_multiply, 0);
                    break;
                case VideoQuality::HIGH:
                    av_dict_set_int(options, "qp", 30 * qp_multiply, 0);
                    break;
                case VideoQuality::VERY_HIGH:
                    av_dict_set_int(options, "qp", 27 * qp_multiply, 0);
                    break;
                case VideoQuality::ULTRA:
                    av_dict_set_int(options, "qp", 22 * qp_multiply, 0);
                    break;
            }
        } else if(codec_context->codec_id == AV_CODEC_ID_HEVC) {
            switch(video_quality) {
                case VideoQuality::MEDIUM:
                    av_dict_set_int(options, "qp", 35 * qp_multiply, 0);
                    break;
                case VideoQuality::HIGH:
                    av_dict_set_int(options, "qp", 30 * qp_multiply, 0);
                    break;
                case VideoQuality::VERY_HIGH:
                    av_dict_set_int(options, "qp", 27 * qp_multiply, 0);
                    break;
                case VideoQuality::ULTRA:
                    av_dict_set_int(options, "qp", 22 * qp_multiply, 0);
                    break;
            }
        } else if(codec_context->codec_id == AV_CODEC_ID_VP8 || codec_context->codec_id == AV_CODEC_ID_VP9) {
            switch(video_quality) {
                case VideoQuality::MEDIUM:
                    av_dict_set_int(options, "qp", 35 * qp_multiply, 0);
                    break;
                case VideoQuality::HIGH:
                    av_dict_set_int(options, "qp", 30 * qp_multiply, 0);
                    break;
                case VideoQuality::VERY_HIGH:
                    av_dict_set_int(options, "qp", 27 * qp_multiply, 0);
                    break;
                case VideoQuality::ULTRA:
                    av_dict_set_int(options, "qp", 22 * qp_multiply, 0);
                    break;
            }
        }
    } else {
        if(codec_context->codec_id == AV_CODEC_ID_AV1) {
            // Using global_quality option
        } else if(codec_context->codec_id == AV_CODEC_ID_H264) {
            switch(video_quality) {
                case VideoQuality::MEDIUM:
                    av_dict_set_int(options, "qp", 35 * qp_multiply, 0);
                    break;
                case VideoQuality::HIGH:
                    av_dict_set_int(options, "qp", 30 * qp_multiply, 0);
                    break;
                case VideoQuality::VERY_HIGH:
                    av_dict_set_int(options, "qp", 27 * qp_multiply, 0);
                    break;
                case VideoQuality::ULTRA:
                    av_dict_set_int(options, "qp", 22 * qp_multiply, 0);
                    break;
            }
        } else if(codec_context->codec_id == AV_CODEC_ID_HEVC) {
            switch(video_quality) {
                case VideoQuality::MEDIUM:
                    av_dict_set_int(options, "qp", 35 * qp_multiply, 0);
                    break;
                case VideoQuality::HIGH:
                    av_dict_set_int(options, "qp", 30 * qp_multiply, 0);
                    break;
                case VideoQuality::VERY_HIGH:
                    av_dict_set_int(options, "qp", 27 * qp_multiply, 0);
                    break;
                case VideoQuality::ULTRA:
                    av_dict_set_int(options, "qp", 22 * qp_multiply, 0);
                    break;
            }
        } else if(codec_context->codec_id == AV_CODEC_ID_VP8 || codec_context->codec_id == AV_CODEC_ID_VP9) {
            switch(video_quality) {
                case VideoQuality::MEDIUM:
                    av_dict_set_int(options, "qp", 35 * qp_multiply, 0);
                    break;
                case VideoQuality::HIGH:
                    av_dict_set_int(options, "qp", 30 * qp_multiply, 0);
                    break;
                case VideoQuality::VERY_HIGH:
                    av_dict_set_int(options, "qp", 27 * qp_multiply, 0);
                    break;
                case VideoQuality::ULTRA:
                    av_dict_set_int(options, "qp", 22 * qp_multiply, 0);
                    break;
            }
        }
    }
}

static void open_video_hardware(AVCodecContext *codec_context, VideoQuality video_quality, bool very_old_gpu, gsr_gpu_vendor vendor, PixelFormat pixel_format, bool hdr, gsr_color_depth color_depth, BitrateMode bitrate_mode, VideoCodec video_codec, bool low_power) {
    (void)very_old_gpu;
    AVDictionary *options = nullptr;

    if(bitrate_mode == BitrateMode::QP)
        video_hardware_set_qp(codec_context, video_quality, vendor, hdr, &options);

    video_set_rc(video_codec, vendor, bitrate_mode, &options);

    // TODO: Enable multipass

    // TODO: Set "usage" option to "record"/"stream" and "content" option to "rendered" for vulkan encoding

    if(vendor == GSR_GPU_VENDOR_NVIDIA) {
        // TODO: These dont seem to be necessary
        // av_dict_set_int(&options, "zerolatency", 1, 0);
        // if(codec_context->codec_id == AV_CODEC_ID_AV1) {
        //     av_dict_set(&options, "tune", "ll", 0);
        // } else if(codec_context->codec_id == AV_CODEC_ID_H264 || codec_context->codec_id == AV_CODEC_ID_HEVC) {
        //     av_dict_set(&options, "preset", "llhq", 0);
        //     av_dict_set(&options, "tune", "ll", 0);
        // }
        av_dict_set(&options, "tune", "hq", 0);

        dict_set_profile(codec_context, vendor, color_depth, &options);

        if(codec_context->codec_id == AV_CODEC_ID_H264) {
            // TODO: h264 10bit?
            // TODO:
            // switch(pixel_format) {
            //     case PixelFormat::YUV420:
            //         av_dict_set_int(&options, "profile", AV_PROFILE_H264_HIGH, 0);
            //         break;
            //     case PixelFormat::YUV444:
            //         av_dict_set_int(&options, "profile", AV_PROFILE_H264_HIGH_444, 0);
            //         break;
            // }
        } else if(codec_context->codec_id == AV_CODEC_ID_AV1) {
            switch(pixel_format) {
                case PixelFormat::YUV420:
                    av_dict_set(&options, "rgb_mode", "yuv420", 0);
                    break;
                case PixelFormat::YUV444:
                    av_dict_set(&options, "rgb_mode", "yuv444", 0);
                    break;
            }
        } else if(codec_context->codec_id == AV_CODEC_ID_HEVC) {
            //av_dict_set(&options, "pix_fmt", "yuv420p16le", 0);
        }
    } else {
        // TODO: More quality options
        if(low_power)
            av_dict_set_int(&options, "low_power", 1, 0);
        // Improves performance but increases vram
        //av_dict_set_int(&options, "async_depth", 8, 0);

        if(codec_context->codec_id == AV_CODEC_ID_H264) {
            // Removed because it causes stutter in games for some people
            //av_dict_set_int(&options, "quality", 5, 0); // quality preset
        } else if(codec_context->codec_id == AV_CODEC_ID_AV1) {
            av_dict_set(&options, "tier", "main", 0);
        } else if(codec_context->codec_id == AV_CODEC_ID_HEVC) {
            if(hdr)
                av_dict_set(&options, "sei", "hdr", 0);
        }

        // TODO: vp8/vp9 10bit
    }

    if(codec_context->codec_id == AV_CODEC_ID_H264) {
        av_dict_set(&options, "coder", "cabac", 0); // TODO: cavlc is faster than cabac but worse compression. Which to use?
    }

    av_dict_set(&options, "strict", "experimental", 0);

    int ret = avcodec_open2(codec_context, codec_context->codec, &options);
    if (ret < 0) {
        fprintf(stderr, "Error: Could not open video codec: %s\n", av_error_to_string(ret));
        _exit(1);
    }
}

static void usage_header() {
    const bool inside_flatpak = getenv("FLATPAK_ID") != NULL;
    const char *program_name = inside_flatpak ? "flatpak run --command=gpu-screen-recorder com.dec05eba.gpu_screen_recorder" : "gpu-screen-recorder";
    printf("usage: %s -w <window_id|monitor|focused|portal> [-c <container_format>] [-s WxH] -f <fps> [-a <audio_input>] [-q <quality>] [-r <replay_buffer_size_sec>] [-k h264|hevc|av1|vp8|vp9|hevc_hdr|av1_hdr|hevc_10bit|av1_10bit] [-ac aac|opus|flac] [-ab <bitrate>] [-oc yes|no] [-fm cfr|vfr|content] [-bm auto|qp|vbr|cbr] [-cr limited|full] [-df yes|no] [-sc <script_path>] [-cursor yes|no] [-keyint <value>] [-restore-portal-session yes|no] [-portal-session-token-filepath filepath] [-encoder gpu|cpu] [-o <output_file>] [-v yes|no] [--version] [-h|--help]\n", program_name);
    fflush(stdout);
}

// TODO: Update with portal info
static void usage_full() {
    const bool inside_flatpak = getenv("FLATPAK_ID") != NULL;
    const char *program_name = inside_flatpak ? "flatpak run --command=gpu-screen-recorder com.dec05eba.gpu_screen_recorder" : "gpu-screen-recorder";
    usage_header();
    printf("\n");
    printf("OPTIONS:\n");
    printf("  -w    Window id to record, a display (monitor name), \"screen\", \"screen-direct-force\", \"focused\" or \"portal\".\n");
    printf("        If this is \"portal\" then xdg desktop screencast portal with PipeWire will be used. Portal option is only available on Wayland.\n");
    printf("        If you select to save the session (token) in the desktop portal capture popup then the session will be saved for the next time you use \"portal\",\n");
    printf("        but the session will be ignored unless you run GPU Screen Recorder with the '-restore-portal-session yes' option.\n");
    printf("        If this is \"screen\" or \"screen-direct-force\" then all monitors are recorded on Nvidia X11.\n");
    printf("        On AMD/Intel or wayland \"screen\" will record the first monitor found.\n");
    printf("        \"screen-direct-force\" is not recommended unless you use a VRR (G-SYNC) monitor on Nvidia X11 and you are aware that using this option can cause\n");
    printf("        games to freeze/crash or other issues because of Nvidia driver issues.\n");
    printf("        \"screen-direct-force\" option is only available on Nvidia X11. VRR works without this option on other systems.\n");
    printf("        Run GPU Screen Recorder with the --list-capture-options option to list valid values for this option.\n");
    printf("\n");
    printf("  -c    Container format for output file, for example mp4, or flv. Only required if no output file is specified or if recording in replay buffer mode.\n");
    printf("        If an output file is specified and -c is not used then the container format is determined from the output filename extension.\n");
    printf("        Only containers that support h264, hevc, av1, vp8 or vp9 are supported, which means that only mp4, mkv, flv, webm (and some others) are supported.\n");
    printf("\n");
    printf("  -s    The output resolution limit of the video in the format WxH, for example 1920x1080. If this is 0x0 then the original resolution is used. Optional, except when -w is \"focused\".\n");
    printf("        Note: the captured content is scaled to this size. The output resolution might not be exactly as specified by this option. The original aspect ratio is respected so the resolution will match that.\n");
    printf("        The video encoder might also need to add padding, which will result in black bars on the sides of the video. This is especially an issue on AMD.\n");
    printf("\n");
    printf("  -f    Frame rate to record at. Recording will only capture frames at this target frame rate.\n");
    printf("        For constant frame rate mode this option is the frame rate every frame will be captured at and if the capture frame rate is below this target frame rate then the frames will be duplicated.\n");
    printf("        For variable frame rate mode this option is the max frame rate and if the capture frame rate is below this target frame rate then frames will not be duplicated.\n");
    printf("        Content frame rate is similar to variable frame rate mode, except the frame rate will match the frame rate of the captured content when possible, but not capturing above the frame rate set in this -f option.\n");
    printf("\n");
    printf("  -a    Audio device or application to record from (pulse audio device). Can be specified multiple times. Each time this is specified a new audio track is added for the specified audio device or application.\n");
    printf("        The audio device can also be \"default_output\" in which case the default output device is used, or \"default_input\" in which case the default input device is used.\n");
    printf("        Multiple audio sources can be merged into one audio track by using \"|\" as a separator into one -a argument, for example: -a \"default_output|default_input\".\n");
    printf("        A name can be given to the audio track by prefixing the audio with <name>/, for example \"track name/default_output\" or \"track name/default_output|default_input\".\n");
    printf("        The audio name can also be prefixed with \"device:\", for example: -a \"device:default_output\".\n");
    printf("        To record audio from an application then prefix the audio name with \"app:\", for example: -a \"app:Brave\". The application name is case-insensitive.\n");
    printf("        To record audio from all applications except the provided ones prefix the audio name with \"app-inverse:\", for example: -a \"app-inverse:Brave\".\n");
    printf("        \"app:\" and \"app-inverse:\" can't be mixed in one audio track.\n");
    printf("        One audio track can contain both audio devices and application audio, for example: -a \"default_output|device:alsa_output.pci-0000_00_1b.0.analog-stereo.monitor|app:Brave\".\n");
    printf("        Recording application audio is only possible when the sound server on the system is PipeWire.\n");
    printf("        If the audio name is an empty string then the argument is ignored.\n");
    printf("        Optional, no audio track is added by default.\n");
    printf("        Run GPU Screen Recorder with the --list-audio-devices option to list valid audio device names.\n");
    printf("        Run GPU Screen Recorder with the --list-application-audio option to list valid application names. It's possible to use an application name that is not listed in --list-application-audio,\n");
    printf("        for example when trying to record audio from an application that hasn't started yet.\n");
    printf("\n");
    printf("  -q    Video quality. Should be either 'medium', 'high', 'very_high' or 'ultra' when using '-bm qp' or '-bm vbr' options, and '-bm qp' is the default option used.\n");
    printf("        'high' is the recommended option when live streaming or when you have a slower harddrive.\n");
    printf("        When using '-bm cbr' option then this is option is instead used to specify the video bitrate in kbps.\n");
    printf("        Optional when using '-bm qp' or '-bm vbr' options, set to 'very_high' be default.\n");
    printf("        Required when using '-bm cbr' option.\n");
    printf("\n");
    printf("  -r    Replay buffer time in seconds. If this is set, then only the last seconds as set by this option will be stored\n");
    printf("        and the video will only be saved when the gpu-screen-recorder is closed. This feature is similar to Nvidia's instant replay feature This option has be between 5 and 1200.\n");
    printf("        Note that the video data is stored in RAM, so don't use too long replay buffer time and use constant bitrate option (-bm cbr) to prevent RAM usage from going too high in busy scenes.\n");
    printf("        Optional, disabled by default.\n");
    printf("\n");
    printf("  -k    Video codec to use. Should be either 'auto', 'h264', 'hevc', 'av1', 'vp8', 'vp9', 'hevc_hdr', 'av1_hdr', 'hevc_10bit' or 'av1_10bit'.\n");
    printf("        Optional, set to 'auto' by default which defaults to 'h264'. Forcefully set to 'h264' if the file container type is 'flv'.\n");
    printf("        'hevc_hdr' and 'av1_hdr' option is not available on X11 nor when using the portal capture option.\n");
    printf("        'hevc_10bit' and 'av1_10bit' options allow you to select 10 bit color depth which can reduce banding and improve quality in darker areas, but not all video players support 10 bit color depth\n");
    printf("        and if you upload the video to a website the website might reduce 10 bit to 8 bit.\n");
    printf("        Note that when using 'hevc_hdr' or 'av1_hdr' the color depth is also 10 bits.\n");
    printf("\n");
    printf("  -ac   Audio codec to use. Should be either 'aac', 'opus' or 'flac'. Optional, set to 'opus' for .mp4/.mkv files, otherwise set to 'aac'.\n");
    printf("        'opus' and 'flac' is only supported by .mp4/.mkv files. 'opus' is recommended for best performance and smallest audio size.\n");
    printf("        Flac audio codec is option is disable at the moment because of a temporary issue.\n");
    printf("\n");
    printf("  -ab   Audio bitrate in kbps. If this is set to 0 then it's the same as if it's absent, in which case the bitrate is determined automatically depending on the audio codec.\n");
    printf("        Optional, by default the bitrate is 128kbps for opus and flac and 160kbps for aac.\n");
    printf("\n");
    printf("  -oc   Overclock memory transfer rate to the maximum performance level. This only applies to NVIDIA on X11 and exists to overcome a bug in NVIDIA driver where performance level\n");
    printf("        is dropped when you record a game. Only needed if you are recording a game that is bottlenecked by GPU. The same issue exists on Wayland but overclocking is not possible on Wayland.\n");
    printf("        Works only if your have \"Coolbits\" set to \"12\" in NVIDIA X settings, see README for more information. Note! use at your own risk! Optional, disabled by default.\n");
    printf("\n");
    printf("  -fm   Framerate mode. Should be either 'cfr' (constant frame rate), 'vfr' (variable frame rate) or 'content'. Optional, set to 'vfr' by default.\n");
    printf("        'vfr' is recommended for recording for less issue with very high system load but some applications such as video editors may not support it properly.\n");
    printf("        'content' is currently only supported on X11 or when using portal capture option. The 'content' option matches the recording frame rate to the captured content.\n");
    printf("\n");
    printf("  -bm   Bitrate mode. Should be either 'auto', 'qp' (constant quality), 'vbr' (variable bitrate) or 'cbr' (constant bitrate). Optional, set to 'auto' by default which defaults to 'qp' on all devices\n");
    printf("        except steam deck that has broken drivers and doesn't support qp.\n");
    printf("        Note: 'vbr' option is not supported when using '-encoder cpu' option.\n");
    printf("\n");
    printf("  -cr   Color range. Should be either 'limited' (aka mpeg) or 'full' (aka jpeg). Optional, set to 'limited' by default.\n");
    printf("        Limited color range means that colors are in range 16-235 (4112-60395 for hdr) while full color range means that colors are in range 0-255 (0-65535 for hdr).\n");
    printf("        Note that some buggy video players (such as vlc) are unable to correctly display videos in full color range and when upload the video to websites the website\n");
    printf("        might re-encoder the video to make the video limited color range.\n");
    printf("\n");
    printf("  -df   Organise replays in folders based on the current date.\n");
    printf("\n");
    printf("  -sc   Run a script on the saved video file (asynchronously). The first argument to the script is the filepath to the saved video file and the second argument is the recording type (either \"regular\" or \"replay\").\n");
    printf("        Not applicable for live streams.\n");
    printf("\n");
    printf("  -cursor\n");
    printf("        Record cursor. Optional, set to 'yes' by default.\n");
    printf("\n");
    printf("  -keyint\n");
    printf("        Specifies the keyframe interval in seconds, the max amount of time to wait to generate a keyframe. Keyframes can be generated more often than this.\n");
    printf("        This also affects seeking in the video and may affect how the replay video is cut. If this is set to 10 for example then you can only seek in 10-second chunks in the video.\n");
    printf("        Setting this to a higher value reduces the video file size if you are ok with the previously described downside. This option is expected to be a floating point number.\n");
    printf("        By default this value is set to 2.0.\n");
    printf("\n");
    printf("  -restore-portal-session\n");
    printf("        If GPU Screen Recorder should use the same capture option as the last time. Using this option removes the popup asking what you want to record the next time you record with '-w portal' if you selected the option to save session (token) in the desktop portal screencast popup.\n");
    printf("        This option may not have any effect on your Wayland compositor and your systems desktop portal needs to support ScreenCast version 5 or later. Optional, set to 'no' by default.\n");
    printf("\n");
    printf("  -portal-session-token-filepath\n");
    printf("        This option is used together with -restore-portal-session option to specify the file path to save/restore the portal session token to/from.\n");
    printf("        This can be used to remember different portal capture options depending on different recording option (such as recording/replay).\n");
    printf("        Optional, set to \"$XDG_CONFIG_HOME/gpu-screen-recorder/restore_token\" by default ($XDG_CONFIG_HOME defaults to \"$HOME/.config\").\n");
    printf("        Note: the directory to the portal session token file is created automatically if it doesn't exist.\n");
    printf("\n");
    printf("  -encoder\n");
    printf("        Which device should be used for video encoding. Should either be 'gpu' or 'cpu'. 'cpu' option currently only work with h264 codec option (-k).\n");
    printf("        Optional, set to 'gpu' by default.\n");
    printf("\n");
    printf("  --info\n");
    printf("        List info about the system. Lists the following information (prints them to stdout and exits):\n");
    printf("        Supported video codecs (h264, h264_software, hevc, hevc_hdr, hevc_10bit, av1, av1_hdr, av1_10bit, vp8, vp9 (if supported)).\n");
    printf("        Supported capture options (window, focused, screen, monitors and portal, if supported by the system).\n");
    printf("        If opengl initialization fails then the program exits with 22, if no usable drm device is found then it exits with 23. On success it exits with 0.\n");
    printf("\n");
    printf("  --list-capture-options\n");
    printf("        List available capture options. Lists capture options in the following format (prints them to stdout and exits):\n");
    printf("          <option>\n");
    printf("          <monitor_name>|<resolution>\n");
    printf("        For example:\n");
    printf("          window\n");
    printf("          DP-1|1920x1080\n");
    printf("        The <option> and <monitor_name> is the name that can be passed to GPU Screen Recorder with the -w option.\n");
    printf("\n");
    printf("  --list-audio-devices\n");
    printf("        List audio devices. Lists audio devices in the following format (prints them to stdout and exits):\n");
    printf("          <audio_device_name>|<audio_device_name_in_human_readable_format>\n");
    printf("        For example:\n");
    printf("          bluez_input.88:C9:E8:66:A2:27|WH-1000XM4\n");
    printf("          alsa_output.pci-0000_0c_00.4.iec958-stereo|Monitor of Starship/Matisse HD Audio Controller Digital Stereo (IEC958)\n");
    printf("        The <audio_device_name> is the name that can be passed to GPU Screen Recorder with the -a option.\n");
    printf("\n");
    printf("  --list-application-audio\n");
    printf("        Lists applications that you can record from (prints them to stdout and exits), for example:\n");
    printf("          firefox\n");
    printf("          csgo\n");
    printf("        These names are the application audio names that can be passed to GPU Screen Recorder with the -a option.\n");
    printf("\n");
    printf("  --version\n");
    printf("        Print version (%s) and exit\n", GSR_VERSION);
    printf("\n");
    //fprintf(stderr, "  -pixfmt  The pixel format to use for the output video. yuv420 is the most common format and is best supported, but the color is compressed, so colors can look washed out and certain colors of text can look bad. Use yuv444 for no color compression, but the video may not work everywhere and it may not work with hardware video decoding. Optional, set to 'yuv420' by default\n");
    printf("  -o    The output file path. If omitted then the encoded data is sent to stdout. Required in replay mode (when using -r).\n");
    printf("        In replay mode this has to be a directory instead of a file.\n");
    printf("        Note: the directory to the file is created automatically if it doesn't already exist.\n");
    printf("\n");
    printf("  -v    Prints fps and damage info once per second. Optional, set to 'yes' by default.\n");
    printf("\n");
    printf("  -h, --help\n");
    printf("        Show this help.\n");
    printf("\n");
    printf("NOTES:\n");
    printf("  Send signal SIGINT to gpu-screen-recorder (Ctrl+C, or killall -SIGINT gpu-screen-recorder) to stop and save the recording. When in replay mode this stops recording without saving.\n");
    printf("  Send signal SIGUSR1 to gpu-screen-recorder (killall -SIGUSR1 gpu-screen-recorder) to save a replay (when in replay mode).\n");
    printf("  Send signal SIGUSR2 to gpu-screen-recorder (killall -SIGUSR2 gpu-screen-recorder) to pause/unpause recording. Only applicable and useful when recording (not streaming nor replay).\n");
    printf("\n");
    printf("EXAMPLES:\n");
    printf("  %s -w screen -f 60 -a default_output -o \"$HOME/Videos/video.mp4\"\n", program_name);
    printf("  %s -w screen -f 60 -a default_output -a default_input -o \"$HOME/Videos/video.mp4\"\n", program_name);
    printf("  %s -w screen -f 60 -a \"default_output|default_input\" -o \"$HOME/Videos/video.mp4\"\n", program_name);
    printf("  %s -w screen -f 60 -a default_output -c mkv -r 60 -o \"$HOME/Videos\"\n", program_name);
    printf("  %s -w screen -f 60 -a default_output -c mkv -sc script.sh -r 60 -o \"$HOME/Videos\"\n", program_name);
    printf("  %s -w portal -f 60 -a default_output -restore-portal-session yes -o \"$HOME/Videos/video.mp4\"\n", program_name);
    printf("  %s -w screen -f 60 -a default_output -bm cbr -q 15000 -o \"$HOME/Videos/video.mp4\"\n", program_name);
    printf("  %s -w screen -f 60 -a \"app:firefox|app:csgo\" -o \"$HOME/Videos/video.mp4\"\n", program_name);
    printf("  %s -w screen -f 60 -a \"app-inverse:firefox|app-inverse:csgo\" -o \"$HOME/Videos/video.mp4\"\n", program_name);
    printf("  %s -w screen -f 60 -a \"default-input|app-inverse:Brave\" -o \"$HOME/Videos/video.mp4\"\n", program_name);
    //fprintf(stderr, "  gpu-screen-recorder -w screen -f 60 -q ultra -pixfmt yuv444 -o video.mp4\n");
    fflush(stdout);
    _exit(1);
}

static void usage() {
    usage_header();
    _exit(1);
}

static sig_atomic_t running = 1;
static sig_atomic_t save_replay = 0;
static sig_atomic_t toggle_pause = 0;

static void stop_handler(int) {
    running = 0;
}

static void save_replay_handler(int) {
    save_replay = 1;
}

static void toggle_pause_handler(int) {
    toggle_pause = 1;
}

static bool is_hex_num(char c) {
    return (c >= 'A' && c <= 'F') || (c >= 'a' && c <= 'f') || (c >= '0' && c <= '9');
}

static bool contains_non_hex_number(const char *str) {
    bool hex_start = false;
    size_t len = strlen(str);
    if(len >= 2 && memcmp(str, "0x", 2) == 0) {
        str += 2;
        len -= 2;
        hex_start = true;
    }

    bool is_hex = false;
    for(size_t i = 0; i < len; ++i) {
        char c = str[i];
        if(c == '\0')
            return false;
        if(!is_hex_num(c))
            return true;
        if((c >= 'A' && c <= 'F') || (c >= 'a' && c <= 'f'))
            is_hex = true;
    }

    return is_hex && !hex_start;
}

static std::string get_date_str() {
    char str[128];
    time_t now = time(NULL);
    struct tm *t = localtime(&now);
    strftime(str, sizeof(str)-1, "%Y-%m-%d_%H-%M-%S", t);
    return str; 
}

static std::string get_date_only_str() {
    char str[128];
    time_t now = time(NULL);
    struct tm *t = localtime(&now);
    strftime(str, sizeof(str)-1, "%Y-%m-%d", t);
    return str;
}

static std::string get_time_only_str() {
    char str[128];
    time_t now = time(NULL);
    struct tm *t = localtime(&now);
    strftime(str, sizeof(str)-1, "%H-%M-%S", t);
    return str;
}

static AVStream* create_stream(AVFormatContext *av_format_context, AVCodecContext *codec_context) {
    AVStream *stream = avformat_new_stream(av_format_context, nullptr);
    if (!stream) {
        fprintf(stderr, "Error: Could not allocate stream\n");
        _exit(1);
    }
    stream->id = av_format_context->nb_streams - 1;
    stream->time_base = codec_context->time_base;
    stream->avg_frame_rate = codec_context->framerate;
    return stream;
}

static void run_recording_saved_script_async(const char *script_file, const char *video_file, const char *type) {
    char script_file_full[PATH_MAX];
    script_file_full[0] = '\0';
    if(!realpath(script_file, script_file_full)) {
        fprintf(stderr, "Error: script file not found: %s\n", script_file);
        return;
    }

    const char *args[6];
    const bool inside_flatpak = getenv("FLATPAK_ID") != NULL;

    if(inside_flatpak) {
        args[0] = "flatpak-spawn";
        args[1] = "--host";
        args[2] = script_file_full;
        args[3] = video_file;
        args[4] = type;
        args[5] = NULL;
    } else {
        args[0] = script_file_full;
        args[1] = video_file;
        args[2] = type;
        args[3] = NULL;
    }

    pid_t pid = fork();
    if(pid == -1) {
        perror(script_file_full);
        return;
    } else if(pid == 0) { // child
        setsid();
        signal(SIGHUP, SIG_IGN);

        pid_t second_child = fork();
        if(second_child == 0) { // child
            execvp(args[0], (char* const*)args);
            perror(script_file_full);
            _exit(127);
        } else if(second_child != -1) { // parent
            _exit(0);
        }
    } else { // parent
        waitpid(pid, NULL, 0);
    }
}

static double audio_codec_get_desired_delay(AudioCodec audio_codec, int fps) {
    const double fps_inv = 1.0 / (double)fps;
    const double base = 0.01 + 1.0/165.0;
    switch(audio_codec) {
        case AudioCodec::OPUS:
            return std::max(0.0, base - fps_inv);
        case AudioCodec::AAC:
            return std::max(0.0, (base + 0.008) * 2.0 - fps_inv);
        case AudioCodec::FLAC:
            // TODO: Test
            return std::max(0.0, base - fps_inv);
    }
    assert(false);
    return std::max(0.0, base - fps_inv);
}

struct AudioDeviceData {
    SoundDevice sound_device;
    AudioInput audio_input;
    AVFilterContext *src_filter_ctx = nullptr;
    AVFrame *frame = nullptr;
    std::thread thread; // TODO: Instead of having a thread for each track, have one thread for all threads and read the data with non-blocking read
};

// TODO: Cleanup
struct AudioTrack {
    std::string name;
    AVCodecContext *codec_context = nullptr;
    AVStream *stream = nullptr;

    std::vector<AudioDeviceData> audio_devices;
    AVFilterGraph *graph = nullptr;
    AVFilterContext *sink = nullptr;
    int stream_index = 0;
    int64_t pts = 0;
};

static bool add_hdr_metadata_to_video_stream(gsr_capture *cap, AVStream *video_stream) {
    size_t light_metadata_size = 0;
    size_t mastering_display_metadata_size = 0;
    AVContentLightMetadata *light_metadata = av_content_light_metadata_alloc(&light_metadata_size);
    #if LIBAVUTIL_VERSION_INT < AV_VERSION_INT(59, 37, 100)
    AVMasteringDisplayMetadata *mastering_display_metadata = av_mastering_display_metadata_alloc();
    mastering_display_metadata_size = sizeof(*mastering_display_metadata);
    #else
    AVMasteringDisplayMetadata *mastering_display_metadata = av_mastering_display_metadata_alloc_size(&mastering_display_metadata_size);
    #endif

    if(!light_metadata || !mastering_display_metadata) {
        if(light_metadata)
            av_freep(light_metadata);

        if(mastering_display_metadata)
            av_freep(mastering_display_metadata);

        return false;
    }

    if(!gsr_capture_set_hdr_metadata(cap, mastering_display_metadata, light_metadata)) {
        av_freep(light_metadata);
        av_freep(mastering_display_metadata);
        return false;
    }

    // TODO: More error checking

    #if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(60, 31, 102)
    const bool content_light_level_added = av_stream_add_side_data(video_stream, AV_PKT_DATA_CONTENT_LIGHT_LEVEL, (uint8_t*)light_metadata, light_metadata_size) == 0;
    #else
    const bool content_light_level_added = av_packet_side_data_add(&video_stream->codecpar->coded_side_data, &video_stream->codecpar->nb_coded_side_data, AV_PKT_DATA_CONTENT_LIGHT_LEVEL, light_metadata, light_metadata_size, 0) != NULL;
    #endif

    #if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(60, 31, 102)
    const bool mastering_display_metadata_added = av_stream_add_side_data(video_stream, AV_PKT_DATA_MASTERING_DISPLAY_METADATA, (uint8_t*)mastering_display_metadata, mastering_display_metadata_size) == 0;
    #else
    const bool mastering_display_metadata_added = av_packet_side_data_add(&video_stream->codecpar->coded_side_data, &video_stream->codecpar->nb_coded_side_data, AV_PKT_DATA_MASTERING_DISPLAY_METADATA, mastering_display_metadata, mastering_display_metadata_size, 0) != NULL;
    #endif

    if(!content_light_level_added)
        av_freep(light_metadata);

    if(!mastering_display_metadata_added)
        av_freep(mastering_display_metadata);

    // Return true even on failure because we dont want to retry adding hdr metadata on failure
    return true;
}

static std::future<void> save_replay_thread;
static std::vector<std::shared_ptr<PacketData>> save_replay_packets;
static std::string save_replay_output_filepath;

static void save_replay_async(AVCodecContext *video_codec_context, int video_stream_index, std::vector<AudioTrack> &audio_tracks, std::deque<std::shared_ptr<PacketData>> &frame_data_queue, bool frames_erased, std::string output_dir, const char *container_format, const std::string &file_extension, std::mutex &write_output_mutex, bool date_folders, bool hdr, gsr_capture *capture) {
    if(save_replay_thread.valid())
        return;
    
    size_t start_index = (size_t)-1;
    int64_t video_pts_offset = 0;
    int64_t audio_pts_offset = 0;

    {
        std::lock_guard<std::mutex> lock(write_output_mutex);
        start_index = (size_t)-1;
        for(size_t i = 0; i < frame_data_queue.size(); ++i) {
            const AVPacket &av_packet = frame_data_queue[i]->data;
            if((av_packet.flags & AV_PKT_FLAG_KEY) && av_packet.stream_index == video_stream_index) {
                start_index = i;
                break;
            }
        }

        if(start_index == (size_t)-1)
            return;

        if(frames_erased) {
            video_pts_offset = frame_data_queue[start_index]->data.pts;
            
            // Find the next audio packet to use as audio pts offset
            for(size_t i = start_index; i < frame_data_queue.size(); ++i) {
                const AVPacket &av_packet = frame_data_queue[i]->data;
                if(av_packet.stream_index != video_stream_index) {
                    audio_pts_offset = av_packet.pts;
                    break;
                }
            }
        } else {
            start_index = 0;
        }

        save_replay_packets.resize(frame_data_queue.size());
        for(size_t i = 0; i < frame_data_queue.size(); ++i) {
            save_replay_packets[i] = frame_data_queue[i];
        }
    }

    if (date_folders) {
        std::string output_folder = output_dir + '/' + get_date_only_str();
        create_directory_recursive(&output_folder[0]);
        save_replay_output_filepath = output_folder + "/Replay_" + get_time_only_str() + "." + file_extension;
    } else {
        create_directory_recursive(&output_dir[0]);
        save_replay_output_filepath = output_dir + "/Replay_" + get_date_str() + "." + file_extension;
    }

    AVFormatContext *av_format_context;
    avformat_alloc_output_context2(&av_format_context, nullptr, container_format, nullptr);

    AVStream *video_stream = create_stream(av_format_context, video_codec_context);
    avcodec_parameters_from_context(video_stream->codecpar, video_codec_context);

    std::unordered_map<int, AudioTrack*> stream_index_to_audio_track_map;
    for(AudioTrack &audio_track : audio_tracks) {
        stream_index_to_audio_track_map[audio_track.stream_index] = &audio_track;
        AVStream *audio_stream = create_stream(av_format_context, audio_track.codec_context);
        if(!audio_track.name.empty())
            av_dict_set(&audio_stream->metadata, "title", audio_track.name.c_str(), 0);
        avcodec_parameters_from_context(audio_stream->codecpar, audio_track.codec_context);
        audio_track.stream = audio_stream;
    }

    const int open_ret = avio_open(&av_format_context->pb, save_replay_output_filepath.c_str(), AVIO_FLAG_WRITE);
    if (open_ret < 0) {
        fprintf(stderr, "Error: Could not open '%s': %s. Make sure %s is an existing directory with write access\n", save_replay_output_filepath.c_str(), av_error_to_string(open_ret), save_replay_output_filepath.c_str());
        return;
    }

    AVDictionary *options = nullptr;
    av_dict_set(&options, "strict", "experimental", 0);

    const int header_write_ret = avformat_write_header(av_format_context, &options);
    if (header_write_ret < 0) {
        fprintf(stderr, "Error occurred when writing header to output file: %s\n", av_error_to_string(header_write_ret));
        avio_close(av_format_context->pb);
        avformat_free_context(av_format_context);
        av_dict_free(&options);
        return;
    }

    if(hdr)
        add_hdr_metadata_to_video_stream(capture, video_stream);

    save_replay_thread = std::async(std::launch::async, [video_stream_index, video_stream, start_index, video_pts_offset, audio_pts_offset, video_codec_context, &audio_tracks, stream_index_to_audio_track_map, av_format_context, options]() mutable {
        for(size_t i = start_index; i < save_replay_packets.size(); ++i) {
            // TODO: Check if successful
            AVPacket av_packet;
            memset(&av_packet, 0, sizeof(av_packet));
            //av_packet_from_data(av_packet, save_replay_packets[i]->data.data, save_replay_packets[i]->data.size);
            av_packet.data = save_replay_packets[i]->data.data;
            av_packet.size = save_replay_packets[i]->data.size;
            av_packet.stream_index = save_replay_packets[i]->data.stream_index;
            av_packet.pts = save_replay_packets[i]->data.pts;
            av_packet.dts = save_replay_packets[i]->data.pts;
            av_packet.flags = save_replay_packets[i]->data.flags;
            //av_packet.duration = save_replay_packets[i]->data.duration;

            AVStream *stream = video_stream;
            AVCodecContext *codec_context = video_codec_context;

            if(av_packet.stream_index == video_stream_index) {
                av_packet.pts -= video_pts_offset;
                av_packet.dts -= video_pts_offset;
            } else {
                AudioTrack *audio_track = stream_index_to_audio_track_map[av_packet.stream_index];
                stream = audio_track->stream;
                codec_context = audio_track->codec_context;

                av_packet.pts -= audio_pts_offset;
                av_packet.dts -= audio_pts_offset;
            }

            av_packet.stream_index = stream->index;
            av_packet_rescale_ts(&av_packet, codec_context->time_base, stream->time_base);

            const int ret = av_write_frame(av_format_context, &av_packet);
            if(ret < 0)
                fprintf(stderr, "Error: Failed to write frame index %d to muxer, reason: %s (%d)\n", stream->index, av_error_to_string(ret), ret);

            //av_packet_free(&av_packet);
        }

        if (av_write_trailer(av_format_context) != 0)
            fprintf(stderr, "Failed to write trailer\n");

        avio_close(av_format_context->pb);
        avformat_free_context(av_format_context);
        av_dict_free(&options);

        for(AudioTrack &audio_track : audio_tracks) {
            audio_track.stream = nullptr;
        }
    });
}

static void split_string(const std::string &str, char delimiter, std::function<bool(const char*,size_t)> callback) {
    size_t index = 0;
    while(index < str.size()) {
        size_t end_index = str.find(delimiter, index);
        if(end_index == std::string::npos)
            end_index = str.size();

        if(!callback(&str[index], end_index - index))
            break;

        index = end_index + 1;
    }
}

static bool string_starts_with(const std::string &str, const char *substr) {
    int len = strlen(substr);
    return (int)str.size() >= len && memcmp(str.data(), substr, len) == 0;
}

static const AudioDevice* get_audio_device_by_name(const std::vector<AudioDevice> &audio_devices, const char *name) {
    for(const auto &audio_device : audio_devices) {
        if(strcmp(audio_device.name.c_str(), name) == 0)
            return &audio_device;
    }
    return nullptr;
}

static MergedAudioInputs parse_audio_input_arg(const char *str, const AudioDevices &audio_devices) {
    MergedAudioInputs result;
    const bool name_is_existing_audio_device = get_audio_device_by_name(audio_devices.audio_inputs, str) != nullptr;
    if(name_is_existing_audio_device) {
        result.audio_inputs.push_back({str, AudioInputType::DEVICE, false});
        return result;
    }

    const char *track_name_sep_ptr = strchr(str, '/');
    if(track_name_sep_ptr) {
        result.track_name.assign(str, track_name_sep_ptr - str);
        str = track_name_sep_ptr + 1;
    }

    split_string(str, '|', [&](const char *sub, size_t size) {
        AudioInput audio_input;
        audio_input.name.assign(sub, size);

        if(string_starts_with(audio_input.name.c_str(), "app:")) {
            audio_input.name.erase(audio_input.name.begin(), audio_input.name.begin() + 4);
            audio_input.type = AudioInputType::APPLICATION;
            audio_input.inverted = false;
            result.audio_inputs.push_back(std::move(audio_input));
            return true;
        } else if(string_starts_with(audio_input.name.c_str(), "app-inverse:")) {
            audio_input.name.erase(audio_input.name.begin(), audio_input.name.begin() + 12);
            audio_input.type = AudioInputType::APPLICATION;
            audio_input.inverted = true;
            result.audio_inputs.push_back(std::move(audio_input));
            return true;
        } else if(string_starts_with(audio_input.name.c_str(), "device:")) {
            audio_input.name.erase(audio_input.name.begin(), audio_input.name.begin() + 7);
            audio_input.type = AudioInputType::DEVICE;
            result.audio_inputs.push_back(std::move(audio_input));
            return true;
        } else {
            audio_input.type = AudioInputType::DEVICE;
            result.audio_inputs.push_back(std::move(audio_input));
            return true;
        }
    });

    return result;
}

// TODO: Does this match all livestreaming cases?
static bool is_livestream_path(const char *str) {
    const int len = strlen(str);
    if((len >= 7 && memcmp(str, "http://", 7) == 0) || (len >= 8 && memcmp(str, "https://", 8) == 0))
        return true;
    else if((len >= 7 && memcmp(str, "rtmp://", 7) == 0) || (len >= 8 && memcmp(str, "rtmps://", 8) == 0))
        return true;
    else if((len >= 7 && memcmp(str, "rtsp://", 7) == 0))
        return true;
    else if((len >= 6 && memcmp(str, "srt://", 6) == 0))
        return true;
    else if((len >= 6 && memcmp(str, "tcp://", 6) == 0))
        return true;
    else if((len >= 6 && memcmp(str, "udp://", 6) == 0))
        return true;
    else
        return false;
}

// TODO: Proper cleanup
static int init_filter_graph(AVCodecContext *audio_codec_context, AVFilterGraph **graph, AVFilterContext **sink, std::vector<AVFilterContext*> &src_filter_ctx, size_t num_sources) {
    char ch_layout[64];
    int err = 0;
    ch_layout[0] = '\0';
 
    AVFilterGraph *filter_graph = avfilter_graph_alloc();
    if (!filter_graph) {
        fprintf(stderr, "Unable to create filter graph.\n");
        return AVERROR(ENOMEM);
    }
 
    for(size_t i = 0; i < num_sources; ++i) {
        const AVFilter *abuffer = avfilter_get_by_name("abuffer");
        if (!abuffer) {
            fprintf(stderr, "Could not find the abuffer filter.\n");
            return AVERROR_FILTER_NOT_FOUND;
        }
    
        AVFilterContext *abuffer_ctx = avfilter_graph_alloc_filter(filter_graph, abuffer, NULL);
        if (!abuffer_ctx) {
            fprintf(stderr, "Could not allocate the abuffer instance.\n");
            return AVERROR(ENOMEM);
        }
    
        #if LIBAVCODEC_VERSION_MAJOR < 60
        av_get_channel_layout_string(ch_layout, sizeof(ch_layout), 0, AV_CH_LAYOUT_STEREO);
        #else
        av_channel_layout_describe(&audio_codec_context->ch_layout, ch_layout, sizeof(ch_layout));
        #endif
        av_opt_set    (abuffer_ctx, "channel_layout", ch_layout,                                               AV_OPT_SEARCH_CHILDREN);
        av_opt_set    (abuffer_ctx, "sample_fmt",     av_get_sample_fmt_name(audio_codec_context->sample_fmt), AV_OPT_SEARCH_CHILDREN);
        av_opt_set_q  (abuffer_ctx, "time_base",      audio_codec_context->time_base,                          AV_OPT_SEARCH_CHILDREN);
        av_opt_set_int(abuffer_ctx, "sample_rate",    audio_codec_context->sample_rate,                        AV_OPT_SEARCH_CHILDREN);
        av_opt_set_int(abuffer_ctx, "bit_rate",       audio_codec_context->bit_rate,                           AV_OPT_SEARCH_CHILDREN);
    
        err = avfilter_init_str(abuffer_ctx, NULL);
        if (err < 0) {
            fprintf(stderr, "Could not initialize the abuffer filter.\n");
            return err;
        }

        src_filter_ctx.push_back(abuffer_ctx);
    }

    const AVFilter *mix_filter = avfilter_get_by_name("amix");
    if (!mix_filter) {
        av_log(NULL, AV_LOG_ERROR, "Could not find the mix filter.\n");
        return AVERROR_FILTER_NOT_FOUND;
    }
    
    char args[512];
    snprintf(args, sizeof(args), "inputs=%d", (int)num_sources);
    
    AVFilterContext *mix_ctx;
    err = avfilter_graph_create_filter(&mix_ctx, mix_filter, "amix", args, NULL, filter_graph);
    if (err < 0) {
        av_log(NULL, AV_LOG_ERROR, "Cannot create audio amix filter\n");
        return err;
    }
 
    const AVFilter *abuffersink = avfilter_get_by_name("abuffersink");
    if (!abuffersink) {
        fprintf(stderr, "Could not find the abuffersink filter.\n");
        return AVERROR_FILTER_NOT_FOUND;
    }
 
    AVFilterContext *abuffersink_ctx = avfilter_graph_alloc_filter(filter_graph, abuffersink, "sink");
    if (!abuffersink_ctx) {
        fprintf(stderr, "Could not allocate the abuffersink instance.\n");
        return AVERROR(ENOMEM);
    }
 
    err = avfilter_init_str(abuffersink_ctx, NULL);
    if (err < 0) {
        fprintf(stderr, "Could not initialize the abuffersink instance.\n");
        return err;
    }
 
    err = 0;
    for(size_t i = 0; i < src_filter_ctx.size(); ++i) {
        AVFilterContext *src_ctx = src_filter_ctx[i];
        if (err >= 0)
            err = avfilter_link(src_ctx, 0, mix_ctx, i);
    }
    if (err >= 0)
        err = avfilter_link(mix_ctx, 0, abuffersink_ctx, 0);
    if (err < 0) {
        av_log(NULL, AV_LOG_ERROR, "Error connecting filters\n");
        return err;
    }
 
    err = avfilter_graph_config(filter_graph, NULL);
    if (err < 0) {
        av_log(NULL, AV_LOG_ERROR, "Error configuring the filter graph\n");
        return err;
    }
 
    *graph = filter_graph;
    *sink  = abuffersink_ctx;
 
    return 0;
}

static gsr_video_encoder* create_video_encoder(gsr_egl *egl, bool overclock, gsr_color_depth color_depth, bool use_software_video_encoder, VideoCodec video_codec) {
    gsr_video_encoder *video_encoder = nullptr;

    if(use_software_video_encoder) {
        gsr_video_encoder_software_params params;
        params.egl = egl;
        params.color_depth = color_depth;
        video_encoder = gsr_video_encoder_software_create(&params);
        return video_encoder;
    }

    if(video_codec_is_vulkan(video_codec)) {
        gsr_video_encoder_vulkan_params params;
        params.egl = egl;
        params.color_depth = color_depth;
        video_encoder = gsr_video_encoder_vulkan_create(&params);
        return video_encoder;
    }

    switch(egl->gpu_info.vendor) {
        case GSR_GPU_VENDOR_AMD:
        case GSR_GPU_VENDOR_INTEL: {
            gsr_video_encoder_vaapi_params params;
            params.egl = egl;
            params.color_depth = color_depth;
            video_encoder = gsr_video_encoder_vaapi_create(&params);
            break;
        }
        case GSR_GPU_VENDOR_NVIDIA: {
            gsr_video_encoder_nvenc_params params;
            params.egl = egl;
            params.overclock = overclock;
            params.color_depth = color_depth;
            video_encoder = gsr_video_encoder_nvenc_create(&params);
            break;
        }
    }

    return video_encoder;
}

static bool get_supported_video_codecs(gsr_egl *egl, VideoCodec video_codec, bool use_software_video_encoder, bool cleanup, gsr_supported_video_codecs *video_codecs) {
    memset(video_codecs, 0, sizeof(*video_codecs));

    if(use_software_video_encoder) {
        video_codecs->h264.supported = true;
        return true;
    }

    if(video_codec_is_vulkan(video_codec))
        return gsr_get_supported_video_codecs_vulkan(video_codecs, egl->card_path, cleanup);

    switch(egl->gpu_info.vendor) {
        case GSR_GPU_VENDOR_AMD:
        case GSR_GPU_VENDOR_INTEL:
            return gsr_get_supported_video_codecs_vaapi(video_codecs, egl->card_path, cleanup);
        case GSR_GPU_VENDOR_NVIDIA:
            return gsr_get_supported_video_codecs_nvenc(video_codecs, cleanup);
    }

    return false;
}

static void xwayland_check_callback(const gsr_monitor *monitor, void *userdata) {
    bool *xwayland_found = (bool*)userdata;
    if(monitor->name_len >= 8 && strncmp(monitor->name, "XWAYLAND", 8) == 0)
        *xwayland_found = true;
    else if(memmem(monitor->name, monitor->name_len, "X11", 3))
        *xwayland_found = true;
}

static bool is_xwayland(Display *display) {
    int opcode, event, error;
    if(XQueryExtension(display, "XWAYLAND", &opcode, &event, &error))
        return true;

    bool xwayland_found = false;
    for_each_active_monitor_output_x11_not_cached(display, xwayland_check_callback, &xwayland_found);
    return xwayland_found;
}

static bool is_using_prime_run() {
    const char *prime_render_offload = getenv("__NV_PRIME_RENDER_OFFLOAD");
    return prime_render_offload && strcmp(prime_render_offload, "1") == 0;
}

static void disable_prime_run() {
    unsetenv("__NV_PRIME_RENDER_OFFLOAD");
    unsetenv("__NV_PRIME_RENDER_OFFLOAD_PROVIDER");
    unsetenv("__GLX_VENDOR_LIBRARY_NAME");
    unsetenv("__VK_LAYER_NV_optimus");
}

static gsr_window* gsr_window_create(Display *display, bool wayland) {
    if(wayland)
        return gsr_window_wayland_create();
    else
        return gsr_window_x11_create(display);
}

static void list_system_info(bool wayland) {
    printf("display_server|%s\n", wayland ? "wayland" : "x11");
    bool supports_app_audio = false;
#ifdef GSR_APP_AUDIO
    supports_app_audio = pulseaudio_server_is_pipewire();
    if(supports_app_audio) {
        gsr_pipewire_audio audio;
        if(gsr_pipewire_audio_init(&audio))
            gsr_pipewire_audio_deinit(&audio);
        else
            supports_app_audio = false;
    }
#endif
    printf("supports_app_audio|%s\n", supports_app_audio ? "yes" : "no");
}

static void list_gpu_info(gsr_egl *egl) {
    switch(egl->gpu_info.vendor) {
        case GSR_GPU_VENDOR_AMD:
            printf("vendor|amd\n");
            break;
        case GSR_GPU_VENDOR_INTEL:
            printf("vendor|intel\n");
            break;
        case GSR_GPU_VENDOR_NVIDIA:
            printf("vendor|nvidia\n");
            break;
    }
}

static const AVCodec* get_ffmpeg_video_codec(VideoCodec video_codec, gsr_gpu_vendor vendor) {
    switch(video_codec) {
        case VideoCodec::H264:
            return avcodec_find_encoder_by_name(vendor == GSR_GPU_VENDOR_NVIDIA ? "h264_nvenc" : "h264_vaapi");
        case VideoCodec::HEVC:
        case VideoCodec::HEVC_HDR:
        case VideoCodec::HEVC_10BIT:
            return avcodec_find_encoder_by_name(vendor == GSR_GPU_VENDOR_NVIDIA ? "hevc_nvenc" : "hevc_vaapi");
        case VideoCodec::AV1:
        case VideoCodec::AV1_HDR:
        case VideoCodec::AV1_10BIT:
            return avcodec_find_encoder_by_name(vendor == GSR_GPU_VENDOR_NVIDIA ? "av1_nvenc" : "av1_vaapi");
        case VideoCodec::VP8:
            return avcodec_find_encoder_by_name(vendor == GSR_GPU_VENDOR_NVIDIA ? "vp8_nvenc" : "vp8_vaapi");
        case VideoCodec::VP9:
            return avcodec_find_encoder_by_name(vendor == GSR_GPU_VENDOR_NVIDIA ? "vp9_nvenc" : "vp9_vaapi");
        case VideoCodec::H264_VULKAN:
            return avcodec_find_encoder_by_name("h264_vulkan");
        case VideoCodec::HEVC_VULKAN:
            return avcodec_find_encoder_by_name("hevc_vulkan");
    }
    return nullptr;
}

static void set_supported_video_codecs_ffmpeg(gsr_supported_video_codecs *supported_video_codecs, gsr_supported_video_codecs *supported_video_codecs_vulkan, gsr_gpu_vendor vendor) {
    if(!get_ffmpeg_video_codec(VideoCodec::H264, vendor)) {
        supported_video_codecs->h264.supported = false;
    }

    if(!get_ffmpeg_video_codec(VideoCodec::HEVC, vendor)) {
        supported_video_codecs->hevc.supported = false;
        supported_video_codecs->hevc_hdr.supported = false;
        supported_video_codecs->hevc_10bit.supported = false;
    }

    if(!get_ffmpeg_video_codec(VideoCodec::AV1, vendor)) {
        supported_video_codecs->av1.supported = false;
        supported_video_codecs->av1_hdr.supported = false;
        supported_video_codecs->av1_10bit.supported = false;
    }

    if(!get_ffmpeg_video_codec(VideoCodec::VP8, vendor)) {
        supported_video_codecs->vp8.supported = false;
    }

    if(!get_ffmpeg_video_codec(VideoCodec::VP9, vendor)) {
        supported_video_codecs->vp9.supported = false;
    }

    if(!get_ffmpeg_video_codec(VideoCodec::H264_VULKAN, vendor)) {
        supported_video_codecs_vulkan->h264.supported = false;
    }

    if(!get_ffmpeg_video_codec(VideoCodec::HEVC_VULKAN, vendor)) {
        supported_video_codecs_vulkan->hevc.supported = false;
        supported_video_codecs_vulkan->hevc_hdr.supported = false;
        supported_video_codecs_vulkan->hevc_10bit.supported = false;
    }
}

static void list_supported_video_codecs(gsr_egl *egl, bool wayland) {
    // Dont clean it up on purpose to increase shutdown speed
    gsr_supported_video_codecs supported_video_codecs;
    get_supported_video_codecs(egl, VideoCodec::H264, false, false, &supported_video_codecs);

    gsr_supported_video_codecs supported_video_codecs_vulkan;
    get_supported_video_codecs(egl, VideoCodec::H264_VULKAN, false, false, &supported_video_codecs_vulkan);

    set_supported_video_codecs_ffmpeg(&supported_video_codecs, &supported_video_codecs_vulkan, egl->gpu_info.vendor);

    if(supported_video_codecs.h264.supported)
        puts("h264");
    if(avcodec_find_encoder_by_name("libx264"))
        puts("h264_software");
    if(supported_video_codecs.hevc.supported)
        puts("hevc");
    if(supported_video_codecs.hevc_hdr.supported && wayland)
        puts("hevc_hdr");
    if(supported_video_codecs.hevc_10bit.supported)
        puts("hevc_10bit");
    if(supported_video_codecs.av1.supported)
        puts("av1");
    if(supported_video_codecs.av1_hdr.supported && wayland)
        puts("av1_hdr");
    if(supported_video_codecs.av1_10bit.supported)
        puts("av1_10bit");
    if(supported_video_codecs.vp8.supported)
        puts("vp8");
    if(supported_video_codecs.vp9.supported)
        puts("vp9");
    //if(supported_video_codecs_vulkan.h264.supported)
    //    puts("h264_vulkan");
    //if(supported_video_codecs_vulkan.hevc.supported)
    //    puts("hevc_vulkan"); // TODO: hdr, 10 bit
}

static bool monitor_capture_use_drm(gsr_egl *egl) {
    return gsr_window_get_display_server(egl->window) == GSR_DISPLAY_SERVER_WAYLAND || egl->gpu_info.vendor != GSR_GPU_VENDOR_NVIDIA;
}

typedef struct {
    gsr_egl *egl;
} capture_options_callback;

static void output_monitor_info(const gsr_monitor *monitor, void *userdata) {
    const capture_options_callback *options = (capture_options_callback*)userdata;
    if(gsr_window_get_display_server(options->egl->window) == GSR_DISPLAY_SERVER_WAYLAND) {
        vec2i monitor_size = monitor->size;
        const gsr_monitor_rotation rot = drm_monitor_get_display_server_rotation(options->egl, monitor);
        if(rot == GSR_MONITOR_ROT_90 || rot == GSR_MONITOR_ROT_270)
            std::swap(monitor_size.x, monitor_size.y);
        printf("%.*s|%dx%d\n", monitor->name_len, monitor->name, monitor_size.x, monitor_size.y);
    } else {
        printf("%.*s|%dx%d\n", monitor->name_len, monitor->name, monitor->size.x, monitor->size.y);
    }
}

static void list_supported_capture_options(gsr_egl *egl, bool list_monitors) {
    const bool wayland = gsr_window_get_display_server(egl->window) == GSR_DISPLAY_SERVER_WAYLAND;
    if(!wayland) {
        puts("window");
        puts("focused");
    }

    if(list_monitors) {
        capture_options_callback options;
        options.egl = egl;
        if(monitor_capture_use_drm(egl)) {
            const bool is_x11 = gsr_window_get_display_server(egl->window) == GSR_DISPLAY_SERVER_X11;
            const gsr_connection_type connection_type = is_x11 ? GSR_CONNECTION_X11 : GSR_CONNECTION_DRM;
            for_each_active_monitor_output(egl, connection_type, output_monitor_info, &options);
        } else {
            puts("screen"); // All monitors in one, only available on Nvidia X11
            for_each_active_monitor_output(egl, GSR_CONNECTION_X11, output_monitor_info, &options);
        }
    }

#ifdef GSR_PORTAL
    // Desktop portal capture on x11 doesn't seem to be hardware accelerated
    if(!wayland)
        return;

    gsr_dbus dbus;
    if(!gsr_dbus_init(&dbus, NULL))
        return;

    char *session_handle = NULL;
    if(gsr_dbus_screencast_create_session(&dbus, &session_handle) == 0) {
        free(session_handle);
        puts("portal");
    }
    gsr_dbus_deinit(&dbus);
#endif
}

static void info_command() {
    bool wayland = false;
    Display *dpy = XOpenDisplay(nullptr);
    if (!dpy) {
        wayland = true;
        fprintf(stderr, "Warning: failed to connect to the X server. Assuming wayland is running without Xwayland\n");
    }

    XSetErrorHandler(x11_error_handler);
    XSetIOErrorHandler(x11_io_error_handler);

    if(!wayland)
        wayland = is_xwayland(dpy);

    if(!wayland && is_using_prime_run()) {
        // Disable prime-run and similar options as it doesn't work, the monitor to capture has to be run on the same device.
        // This is fine on wayland since nvidia uses drm interface there and the monitor query checks the monitors connected
        // to the drm device.
        fprintf(stderr, "Warning: use of prime-run on X11 is not supported. Disabling prime-run\n");
        disable_prime_run();
    }

    gsr_window *window = gsr_window_create(dpy, wayland);
    if(!window) {
        fprintf(stderr, "Error: failed to create window\n");
        _exit(1);
    }

    gsr_egl egl;
    if(!gsr_egl_load(&egl, window, false)) {
        fprintf(stderr, "gsr error: failed to load opengl\n");
        _exit(22);
    }

    bool list_monitors = true;
    egl.card_path[0] = '\0';
    if(monitor_capture_use_drm(&egl)) {
        // TODO: Allow specifying another card, and in other places
        if(!gsr_get_valid_card_path(&egl, egl.card_path, true)) {
            fprintf(stderr, "Error: no /dev/dri/cardX device found. Make sure that you have at least one monitor connected\n");
            list_monitors = false;
        }
    }

    av_log_set_level(AV_LOG_FATAL);

    puts("section=system_info");
    list_system_info(wayland);
    if(egl.gpu_info.is_steam_deck)
        puts("is_steam_deck|yes");
    else
        puts("is_steam_deck|no");
    puts("section=gpu_info");
    list_gpu_info(&egl);
    puts("section=video_codecs");
    list_supported_video_codecs(&egl, wayland);
    puts("section=capture_options");
    list_supported_capture_options(&egl, list_monitors);

    fflush(stdout);

    // Not needed as this will just slow down shutdown
    //gsr_egl_unload(&egl);
    //if(dpy)
    //    XCloseDisplay(dpy);

    _exit(0);
}

static void list_audio_devices_command() {
    const AudioDevices audio_devices = get_pulseaudio_inputs();

    if(!audio_devices.default_output.empty())
        puts("default_output|Default output");

    if(!audio_devices.default_input.empty())
        puts("default_input|Default input");

    for(const auto &audio_input : audio_devices.audio_inputs) {
        printf("%s|%s\n", audio_input.name.c_str(), audio_input.description.c_str());
    }

    fflush(stdout);
    _exit(0);
}

static bool app_audio_query_callback(const char *app_name, void*) {
    puts(app_name);
    return true;
}

static void list_application_audio_command() {
#ifdef GSR_APP_AUDIO
    if(pulseaudio_server_is_pipewire()) {
        gsr_pipewire_audio audio;
        if(gsr_pipewire_audio_init(&audio)) {
            gsr_pipewire_audio_for_each_app(&audio, app_audio_query_callback, NULL);
            gsr_pipewire_audio_deinit(&audio);
        }
    }
#endif

    fflush(stdout);
    _exit(0);
}

static void list_capture_options_command() {
    bool wayland = false;
    Display *dpy = XOpenDisplay(nullptr);
    if (!dpy) {
        wayland = true;
        fprintf(stderr, "Warning: failed to connect to the X server. Assuming wayland is running without Xwayland\n");
    }

    XSetErrorHandler(x11_error_handler);
    XSetIOErrorHandler(x11_io_error_handler);

    if(!wayland)
        wayland = is_xwayland(dpy);

    if(!wayland && is_using_prime_run()) {
        // Disable prime-run and similar options as it doesn't work, the monitor to capture has to be run on the same device.
        // This is fine on wayland since nvidia uses drm interface there and the monitor query checks the monitors connected
        // to the drm device.
        fprintf(stderr, "Warning: use of prime-run on X11 is not supported. Disabling prime-run\n");
        disable_prime_run();
    }

    gsr_window *window = gsr_window_create(dpy, wayland);
    if(!window) {
        fprintf(stderr, "Error: failed to create window\n");
        _exit(1);
    }

    gsr_egl egl;
    if(!gsr_egl_load(&egl, window, false)) {
        fprintf(stderr, "gsr error: failed to load opengl\n");
        _exit(1);
    }

    bool list_monitors = true;
    egl.card_path[0] = '\0';
    if(monitor_capture_use_drm(&egl)) {
        // TODO: Allow specifying another card, and in other places
        if(!gsr_get_valid_card_path(&egl, egl.card_path, true)) {
            fprintf(stderr, "Error: no /dev/dri/cardX device found. Make sure that you have at least one monitor connected\n");
            list_monitors = false;
        }
    }

    av_log_set_level(AV_LOG_FATAL);
    list_supported_capture_options(&egl, list_monitors);

    fflush(stdout);

    // Not needed as this will just slow down shutdown
    //gsr_egl_unload(&egl);
    //if(dpy)
    //    XCloseDisplay(dpy);

    _exit(0);
}

static gsr_capture* create_capture_impl(std::string &window_str, vec2i output_resolution, bool wayland, gsr_egl *egl, int fps, VideoCodec video_codec, gsr_color_range color_range,
    bool record_cursor, bool use_software_video_encoder, bool restore_portal_session, const char *portal_session_token_filepath,
    gsr_color_depth color_depth)
{
    Window src_window_id = None;
    bool follow_focused = false;

    gsr_capture *capture = nullptr;
    if(strcmp(window_str.c_str(), "focused") == 0) {
        if(wayland) {
            fprintf(stderr, "Error: GPU Screen Recorder window capture only works in a pure X11 session. Xwayland is not supported. You can record a monitor instead on wayland\n");
            _exit(2);
        }

        if(output_resolution.x <= 0 || output_resolution.y <= 0) {
            fprintf(stderr, "Error: invalid value for option -s '%dx%d' when using -w focused option. expected width and height to be greater than 0\n", output_resolution.x, output_resolution.y);
            usage();
        }

        follow_focused = true;
    } else if(strcmp(window_str.c_str(), "portal") == 0) {
#ifdef GSR_PORTAL
        // Desktop portal capture on x11 doesn't seem to be hardware accelerated
        if(!wayland) {
            fprintf(stderr, "Error: desktop portal capture is not supported on X11\n");
            _exit(1);
        }

        gsr_capture_portal_params portal_params;
        portal_params.egl = egl;
        portal_params.color_depth = color_depth;
        portal_params.color_range = color_range;
        portal_params.record_cursor = record_cursor;
        portal_params.restore_portal_session = restore_portal_session;
        portal_params.portal_session_token_filepath = portal_session_token_filepath;
        portal_params.output_resolution = output_resolution;
        capture = gsr_capture_portal_create(&portal_params);
        if(!capture)
            _exit(1);
#else
        fprintf(stderr, "Error: option '-w portal' used but GPU Screen Recorder was compiled without desktop portal support. Please recompile GPU Screen recorder with the -Dportal=true option\n");
        _exit(2);
#endif
    } else if(contains_non_hex_number(window_str.c_str())) {
        if(monitor_capture_use_drm(egl)) {
            const bool is_x11 = gsr_window_get_display_server(egl->window) == GSR_DISPLAY_SERVER_X11;
            const gsr_connection_type connection_type = is_x11 ? GSR_CONNECTION_X11 : GSR_CONNECTION_DRM;

            if(strcmp(window_str.c_str(), "screen") == 0) {
                FirstOutputCallback first_output;
                first_output.output_name = NULL;
                for_each_active_monitor_output(egl, connection_type, get_first_output, &first_output);

                if(first_output.output_name) {
                    window_str = first_output.output_name;
                } else {
                    fprintf(stderr, "Error: no usable output found\n");
                    _exit(1);
                }
            } else {
                gsr_monitor gmon;
                if(!get_monitor_by_name(egl, connection_type, window_str.c_str(), &gmon)) {
                    fprintf(stderr, "gsr error: display \"%s\" not found, expected one of:\n", window_str.c_str());
                    fprintf(stderr, "    \"screen\"\n");
                    for_each_active_monitor_output(egl, connection_type, monitor_output_callback_print, NULL);
                    _exit(1);
                }
            }
        } else {
            if(strcmp(window_str.c_str(), "screen") != 0 && strcmp(window_str.c_str(), "screen-direct") != 0 && strcmp(window_str.c_str(), "screen-direct-force") != 0) {
                gsr_monitor gmon;
                if(!get_monitor_by_name(egl, GSR_CONNECTION_X11, window_str.c_str(), &gmon)) {
                    Display *display = (Display*)gsr_window_get_display(egl->window);
                    const int screens_width = XWidthOfScreen(DefaultScreenOfDisplay(display));
                    const int screens_height = XWidthOfScreen(DefaultScreenOfDisplay(display));
                    fprintf(stderr, "gsr error: display \"%s\" not found, expected one of:\n", window_str.c_str());
                    fprintf(stderr, "    \"screen\"    (%dx%d+%d+%d)\n", screens_width, screens_height, 0, 0);
                    fprintf(stderr, "    \"screen-direct\"    (%dx%d+%d+%d)\n", screens_width, screens_height, 0, 0);
                    fprintf(stderr, "    \"screen-direct-force\"    (%dx%d+%d+%d)\n", screens_width, screens_height, 0, 0);
                    for_each_active_monitor_output(egl, GSR_CONNECTION_X11, monitor_output_callback_print, NULL);
                    _exit(1);
                }
            }
        }

        if(egl->gpu_info.vendor == GSR_GPU_VENDOR_NVIDIA && !wayland) {
            const char *capture_target = window_str.c_str();
            bool direct_capture = strcmp(window_str.c_str(), "screen-direct") == 0;
            if(direct_capture) {
                capture_target = "screen";
                // TODO: Temporary disable direct capture because push model causes stuttering when it's direct capturing. This might be a nvfbc bug. This does not happen when using a compositor.
                direct_capture = false;
                fprintf(stderr, "Warning: screen-direct has temporary been disabled as it causes stuttering. This is likely a NvFBC bug. Falling back to \"screen\".\n");
            }

            if(strcmp(window_str.c_str(), "screen-direct-force") == 0) {
                direct_capture = true;
                capture_target = "screen";
            }

            gsr_capture_nvfbc_params nvfbc_params;
            nvfbc_params.egl = egl;
            nvfbc_params.display_to_capture = capture_target;
            nvfbc_params.fps = fps;
            nvfbc_params.pos = { 0, 0 };
            nvfbc_params.size = { 0, 0 };
            nvfbc_params.direct_capture = direct_capture;
            nvfbc_params.color_depth = color_depth;
            nvfbc_params.color_range = color_range;
            nvfbc_params.record_cursor = record_cursor;
            nvfbc_params.use_software_video_encoder = use_software_video_encoder;
            nvfbc_params.output_resolution = output_resolution;
            capture = gsr_capture_nvfbc_create(&nvfbc_params);
            if(!capture)
                _exit(1);
        } else {
            gsr_capture_kms_params kms_params;
            kms_params.egl = egl;
            kms_params.display_to_capture = window_str.c_str();
            kms_params.color_depth = color_depth;
            kms_params.color_range = color_range;
            kms_params.record_cursor = record_cursor;
            kms_params.hdr = video_codec_is_hdr(video_codec);
            kms_params.fps = fps;
            kms_params.output_resolution = output_resolution;
            capture = gsr_capture_kms_create(&kms_params);
            if(!capture)
                _exit(1);
        }
    } else {
        if(wayland) {
            fprintf(stderr, "Error: GPU Screen Recorder window capture only works in a pure X11 session. Xwayland is not supported. You can record a monitor instead on wayland\n");
            _exit(2);
        }

        errno = 0;
        src_window_id = strtol(window_str.c_str(), nullptr, 0);
        if(src_window_id == None || errno == EINVAL) {
            fprintf(stderr, "Invalid window number %s\n", window_str.c_str());
            usage();
        }
    }

    if(!capture) {
        gsr_capture_xcomposite_params xcomposite_params;
        xcomposite_params.egl = egl;
        xcomposite_params.window = src_window_id;
        xcomposite_params.follow_focused = follow_focused;
        xcomposite_params.color_range = color_range;
        xcomposite_params.record_cursor = record_cursor;
        xcomposite_params.color_depth = color_depth;
        xcomposite_params.output_resolution = output_resolution;
        capture = gsr_capture_xcomposite_create(&xcomposite_params);
        if(!capture)
            _exit(1);
    }

    return capture;
}

static AVPixelFormat get_pixel_format(VideoCodec video_codec, gsr_gpu_vendor vendor, bool use_software_video_encoder) {
    if(use_software_video_encoder) {
        return AV_PIX_FMT_NV12;
    } else {
        if(video_codec_is_vulkan(video_codec))
            return AV_PIX_FMT_VULKAN;
        else
            return vendor == GSR_GPU_VENDOR_NVIDIA ? AV_PIX_FMT_CUDA : AV_PIX_FMT_VAAPI;
    }
}

struct Arg {
    std::vector<const char*> values;
    bool optional = false;
    bool list = false;

    const char* value() const {
        if(values.empty())
            return nullptr;
        return values.front();
    }
};

static void match_app_audio_input_to_available_apps(const std::vector<AudioInput> &requested_audio_inputs, const std::vector<std::string> &app_audio_names) {
    for(const AudioInput &request_audio_input : requested_audio_inputs) {
        if(request_audio_input.type != AudioInputType::APPLICATION || request_audio_input.inverted)
            continue;

        bool match = false;
        for(const std::string &app_name : app_audio_names) {
            if(strcasecmp(app_name.c_str(), request_audio_input.name.c_str()) == 0) {
                match = true;
                break;
            }
        }

        if(!match) {
            fprintf(stderr, "gsr warning: no audio application with the name \"%s\" was found, expected one of the following:\n", request_audio_input.name.c_str());
            for(const std::string &app_name : app_audio_names) {
                fprintf(stderr, "  * %s\n", app_name.c_str());
            }
            fprintf(stderr, "  assuming this is intentional (if you are trying to record audio for applications that haven't started yet).\n");
        }
    }
}

// Manually check if the audio inputs we give exist. This is only needed for pipewire, not pulseaudio.
// Pipewire instead DEFAULTS TO THE DEFAULT AUDIO INPUT. THAT'S RETARDED.
// OH, YOU MISSPELLED THE AUDIO INPUT? FUCK YOU
static std::vector<MergedAudioInputs> parse_audio_inputs(const AudioDevices &audio_devices, const Arg &audio_input_arg) {
    std::vector<MergedAudioInputs> requested_audio_inputs;

    for(const char *audio_input : audio_input_arg.values) {
        if(!audio_input || audio_input[0] == '\0')
            continue;

        requested_audio_inputs.push_back(parse_audio_input_arg(audio_input, audio_devices));
        for(AudioInput &request_audio_input : requested_audio_inputs.back().audio_inputs) {
            if(request_audio_input.type != AudioInputType::DEVICE)
                continue;

            bool match = false;

            if(request_audio_input.name == "default_output") {
                if(audio_devices.default_output.empty()) {
                    fprintf(stderr, "Error: -a default_output was specified but no default audio output is specified in the audio server\n");
                    _exit(2);
                }
                request_audio_input.name = audio_devices.default_output;
                match = true;
            } else if(request_audio_input.name == "default_input") {
                if(audio_devices.default_input.empty()) {
                    fprintf(stderr, "Error: -a default_input was specified but no default audio input is specified in the audio server\n");
                    _exit(2);
                }
                request_audio_input.name = audio_devices.default_input;
                match = true;
            } else {
                const bool name_is_existing_audio_device = get_audio_device_by_name(audio_devices.audio_inputs, request_audio_input.name.c_str()) != nullptr;
                if(name_is_existing_audio_device)
                    match = true;
            }

            if(!match) {
                fprintf(stderr, "Error: Audio device '%s' is not a valid audio device, expected one of:\n", request_audio_input.name.c_str());
                if(!audio_devices.default_output.empty())
                    fprintf(stderr, "    default_output (Default output)\n");
                if(!audio_devices.default_input.empty())
                    fprintf(stderr, "    default_input (Default input)\n");
                for(const auto &audio_device_input : audio_devices.audio_inputs) {
                    fprintf(stderr, "    %s (%s)\n", audio_device_input.name.c_str(), audio_device_input.description.c_str());
                }
                _exit(2);
            }
        }
    }

    return requested_audio_inputs;
}

static bool audio_inputs_has_app_audio(const std::vector<AudioInput> &audio_inputs) {
    for(const auto &audio_input : audio_inputs) {
        if(audio_input.type == AudioInputType::APPLICATION)
            return true;
    }
    return false;
}

static bool merged_audio_inputs_has_app_audio(const std::vector<MergedAudioInputs> &merged_audio_inputs) {
    for(const auto &merged_audio_input : merged_audio_inputs) {
        if(audio_inputs_has_app_audio(merged_audio_input.audio_inputs))
            return true;
    }
    return false;
}

// Should use amix if more than 1 audio device and 0 application audio, merged
static bool audio_inputs_should_use_amix(const std::vector<AudioInput> &audio_inputs) {
    int num_audio_devices = 0;
    int num_app_audio = 0;

    for(const auto &audio_input : audio_inputs) {
        if(audio_input.type == AudioInputType::DEVICE)
            ++num_audio_devices;
        else if(audio_input.type == AudioInputType::APPLICATION)
            ++num_app_audio;
    }

    return num_audio_devices > 1 && num_app_audio == 0;
}

static bool merged_audio_inputs_should_use_amix(const std::vector<MergedAudioInputs> &merged_audio_inputs) {
    for(const auto &merged_audio_input : merged_audio_inputs) {
        if(audio_inputs_should_use_amix(merged_audio_input.audio_inputs))
            return true;
    }
    return false;
}

static void validate_merged_audio_inputs_app_audio(const std::vector<MergedAudioInputs> &merged_audio_inputs, const std::vector<std::string> &app_audio_names) {
    for(const auto &merged_audio_input : merged_audio_inputs) {
        int num_app_audio = 0;
        int num_app_inverted_audio = 0;

        for(const auto &audio_input : merged_audio_input.audio_inputs) {
            if(audio_input.type == AudioInputType::APPLICATION) {
                if(audio_input.inverted)
                    ++num_app_inverted_audio;
                else
                    ++num_app_audio;
            }
        }

        match_app_audio_input_to_available_apps(merged_audio_input.audio_inputs, app_audio_names);

        if(num_app_audio > 0 && num_app_inverted_audio > 0) {
            fprintf(stderr, "gsr error: argument -a was provided with both app: and app-inverse:, only one of them can be used for one audio track\n");
            _exit(2);
        }
    }
}

static AudioCodec select_audio_codec_with_fallback(AudioCodec audio_codec, const std::string &file_extension, bool uses_amix) {
    switch(audio_codec) {
        case AudioCodec::AAC: {
            if(file_extension == "webm") {
                //audio_codec_to_use = "opus";
                audio_codec = AudioCodec::OPUS;
                fprintf(stderr, "Warning: .webm files only support opus audio codec, changing audio codec from aac to opus\n");
            }
            break;
        }
        case AudioCodec::OPUS: {
            // TODO: Also check mpegts?
            if(file_extension != "mp4" && file_extension != "mkv" && file_extension != "webm") {
                //audio_codec_to_use = "aac";
                audio_codec = AudioCodec::AAC;
                fprintf(stderr, "Warning: opus audio codec is only supported by .mp4, .mkv and .webm files, falling back to aac instead\n");
            }
            break;
        }
        case AudioCodec::FLAC: {
            // TODO: Also check mpegts?
            if(file_extension == "webm") {
                //audio_codec_to_use = "opus";
                audio_codec = AudioCodec::OPUS;
                fprintf(stderr, "Warning: .webm files only support opus audio codec, changing audio codec from flac to opus\n");
            } else if(file_extension != "mp4" && file_extension != "mkv") {
                //audio_codec_to_use = "aac";
                audio_codec = AudioCodec::AAC;
                fprintf(stderr, "Warning: flac audio codec is only supported by .mp4 and .mkv files, falling back to aac instead\n");
            } else if(uses_amix) {
                // TODO: remove this? is it true anymore?
                //audio_codec_to_use = "opus";
                audio_codec = AudioCodec::OPUS;
                fprintf(stderr, "Warning: flac audio codec is not supported when mixing audio sources, falling back to opus instead\n");
            }
            break;
        }
    }
    return audio_codec;
}

static const char* video_codec_to_string(VideoCodec video_codec) {
    switch(video_codec) { 
        case VideoCodec::H264:        return "h264";
        case VideoCodec::HEVC:        return "hevc";
        case VideoCodec::HEVC_HDR:    return "hevc_hdr";
        case VideoCodec::HEVC_10BIT:  return "hevc_10bit";
        case VideoCodec::AV1:         return "av1";
        case VideoCodec::AV1_HDR:     return "av1_hdr";
        case VideoCodec::AV1_10BIT:   return "av1_10bit";
        case VideoCodec::VP8:         return "vp8";
        case VideoCodec::VP9:         return "vp9";
        case VideoCodec::H264_VULKAN: return "h264_vulkan";
        case VideoCodec::HEVC_VULKAN: return "hevc_vulkan";
    }
    return "";
}

static bool video_codec_only_supports_low_power_mode(const gsr_supported_video_codecs &supported_video_codecs, VideoCodec video_codec) {
    switch(video_codec) { 
        case VideoCodec::H264:        return supported_video_codecs.h264.low_power;
        case VideoCodec::HEVC:        return supported_video_codecs.hevc.low_power;
        case VideoCodec::HEVC_HDR:    return supported_video_codecs.hevc_hdr.low_power;
        case VideoCodec::HEVC_10BIT:  return supported_video_codecs.hevc_10bit.low_power;
        case VideoCodec::AV1:         return supported_video_codecs.av1.low_power;
        case VideoCodec::AV1_HDR:     return supported_video_codecs.av1_hdr.low_power;
        case VideoCodec::AV1_10BIT:   return supported_video_codecs.av1_10bit.low_power;
        case VideoCodec::VP8:         return supported_video_codecs.vp8.low_power;
        case VideoCodec::VP9:         return supported_video_codecs.vp9.low_power;
        case VideoCodec::H264_VULKAN: return supported_video_codecs.h264.low_power;
        case VideoCodec::HEVC_VULKAN: return supported_video_codecs.hevc.low_power; // TODO: hdr, 10 bit
    }
    return false;
}

static const AVCodec* pick_video_codec(VideoCodec *video_codec, gsr_egl *egl, bool use_software_video_encoder, bool video_codec_auto, const char *video_codec_to_use, bool is_flv, bool *low_power) {
    // TODO: software encoder for hevc, av1, vp8 and vp9
    *low_power = false;

    gsr_supported_video_codecs supported_video_codecs;
    if(!get_supported_video_codecs(egl, *video_codec, use_software_video_encoder, true, &supported_video_codecs)) {
        fprintf(stderr, "Error: failed to query for supported video codecs\n");
        _exit(11);
    }

    const AVCodec *video_codec_f = nullptr;

    switch(*video_codec) {
        case VideoCodec::H264: {
            if(use_software_video_encoder)
                video_codec_f = avcodec_find_encoder_by_name("libx264");
            else if(supported_video_codecs.h264.supported)
                video_codec_f = get_ffmpeg_video_codec(*video_codec, egl->gpu_info.vendor);
            break;
        }
        case VideoCodec::HEVC: {
            if(supported_video_codecs.hevc.supported)
                video_codec_f = get_ffmpeg_video_codec(*video_codec, egl->gpu_info.vendor);
            break;
        }
        case VideoCodec::HEVC_HDR: {
            if(supported_video_codecs.hevc_hdr.supported)
                video_codec_f = get_ffmpeg_video_codec(*video_codec, egl->gpu_info.vendor);
            break;
        }
        case VideoCodec::HEVC_10BIT: {
            if(supported_video_codecs.hevc_10bit.supported)
                video_codec_f = get_ffmpeg_video_codec(*video_codec, egl->gpu_info.vendor);
            break;
        }
        case VideoCodec::AV1: {
            if(supported_video_codecs.av1.supported)
                video_codec_f = get_ffmpeg_video_codec(*video_codec, egl->gpu_info.vendor);
            break;
        }
        case VideoCodec::AV1_HDR: {
            if(supported_video_codecs.av1_hdr.supported)
                video_codec_f = get_ffmpeg_video_codec(*video_codec, egl->gpu_info.vendor);
            break;
        }
        case VideoCodec::AV1_10BIT: {
            if(supported_video_codecs.av1_10bit.supported)
                video_codec_f = get_ffmpeg_video_codec(*video_codec, egl->gpu_info.vendor);
            break;
        }
        case VideoCodec::VP8: {
            if(supported_video_codecs.vp8.supported)
                video_codec_f = get_ffmpeg_video_codec(*video_codec, egl->gpu_info.vendor);
            break;
        }
        case VideoCodec::VP9: {
            if(supported_video_codecs.vp9.supported)
                video_codec_f = get_ffmpeg_video_codec(*video_codec, egl->gpu_info.vendor);
            break;
        }
        case VideoCodec::H264_VULKAN: {
            if(supported_video_codecs.h264.supported)
                video_codec_f = get_ffmpeg_video_codec(*video_codec, egl->gpu_info.vendor);
            break;
        }
        case VideoCodec::HEVC_VULKAN: {
            // TODO: hdr, 10 bit
            if(supported_video_codecs.hevc.supported)
                video_codec_f = get_ffmpeg_video_codec(*video_codec, egl->gpu_info.vendor);
            break;
        }
    }

    if(!video_codec_auto && !video_codec_f && !is_flv) {
        switch(*video_codec) {
            case VideoCodec::H264: {
                fprintf(stderr, "Warning: selected video codec h264 is not supported, trying hevc instead\n");
                video_codec_to_use = "hevc";
                if(supported_video_codecs.hevc.supported)
                    video_codec_f = get_ffmpeg_video_codec(*video_codec, egl->gpu_info.vendor);
                break;
            }
            case VideoCodec::HEVC:
            case VideoCodec::HEVC_HDR:
            case VideoCodec::HEVC_10BIT: {
                fprintf(stderr, "Warning: selected video codec hevc is not supported, trying h264 instead\n");
                video_codec_to_use = "h264";
                *video_codec = VideoCodec::H264;
                if(supported_video_codecs.h264.supported)
                    video_codec_f = get_ffmpeg_video_codec(*video_codec, egl->gpu_info.vendor);
                break;
            }
            case VideoCodec::AV1:
            case VideoCodec::AV1_HDR:
            case VideoCodec::AV1_10BIT: {
                fprintf(stderr, "Warning: selected video codec av1 is not supported, trying h264 instead\n");
                video_codec_to_use = "h264";
                *video_codec = VideoCodec::H264;
                if(supported_video_codecs.h264.supported)
                    video_codec_f = get_ffmpeg_video_codec(*video_codec, egl->gpu_info.vendor);
                break;
            }
            case VideoCodec::VP8:
            case VideoCodec::VP9:
                // TODO: Cant fallback to other codec because webm only supports vp8/vp9
                break;
            case VideoCodec::H264_VULKAN: {
                fprintf(stderr, "Warning: selected video codec h264_vulkan is not supported, trying h264 instead\n");
                video_codec_to_use = "h264";
                *video_codec = VideoCodec::H264;
                // Need to do a query again because this time it's without vulkan
                if(!get_supported_video_codecs(egl, *video_codec, use_software_video_encoder, true, &supported_video_codecs)) {
                    fprintf(stderr, "Error: failed to query for supported video codecs\n");
                    _exit(11);
                }
                if(supported_video_codecs.h264.supported)
                    video_codec_f = get_ffmpeg_video_codec(*video_codec, egl->gpu_info.vendor);
                break;
            }
            case VideoCodec::HEVC_VULKAN: {
                fprintf(stderr, "Warning: selected video codec hevc_vulkan is not supported, trying hevc instead\n");
                video_codec_to_use = "hevc";
                *video_codec = VideoCodec::HEVC;
                // Need to do a query again because this time it's without vulkan
                if(!get_supported_video_codecs(egl, *video_codec, use_software_video_encoder, true, &supported_video_codecs)) {
                    fprintf(stderr, "Error: failed to query for supported video codecs\n");
                    _exit(11);
                }
                if(supported_video_codecs.hevc.supported)
                    video_codec_f = get_ffmpeg_video_codec(*video_codec, egl->gpu_info.vendor);
                break;
            }
        }
    }

    (void)video_codec_to_use;

    if(!video_codec_f) {
        const char *video_codec_name = video_codec_to_string(*video_codec);
        fprintf(stderr, "Error: your gpu does not support '%s' video codec. If you are sure that your gpu does support '%s' video encoding and you are using an AMD/Intel GPU,\n"
            "  then make sure you have installed the GPU specific vaapi packages (intel-media-driver, libva-intel-driver, libva-mesa-driver and linux-firmware).\n"
            "  It's also possible that your distro has disabled hardware accelerated video encoding for '%s' video codec.\n"
            "  This may be the case on corporate distros such as Manjaro, Fedora or OpenSUSE.\n"
            "  You can test this by running 'vainfo | grep VAEntrypointEncSlice' to see if it matches any H264/HEVC/AV1/VP8/VP9 profile.\n"
            "  On such distros, you need to manually install mesa from source to enable H264/HEVC hardware acceleration, or use a more user friendly distro. Alternatively record with AV1 if supported by your GPU.\n"
            "  You can alternatively use the flatpak version of GPU Screen Recorder (https://flathub.org/apps/com.dec05eba.gpu_screen_recorder) which bypasses system issues with patented H264/HEVC codecs.\n"
            "  Make sure you have mesa-extra freedesktop runtime installed when using the flatpak (this should be the default), which can be installed with this command:\n"
            "  flatpak install --system org.freedesktop.Platform.GL.default//23.08-extra\n"
            "  If your GPU doesn't support hardware accelerated video encoding then you can use '-encoder cpu' option to encode with your cpu instead.\n", video_codec_name, video_codec_name, video_codec_name);
        _exit(2);
    }

    *low_power = video_codec_only_supports_low_power_mode(supported_video_codecs, *video_codec);

    return video_codec_f;
}

static const AVCodec* select_video_codec_with_fallback(VideoCodec *video_codec, const char *video_codec_to_use, const char *file_extension, bool use_software_video_encoder, gsr_egl *egl, bool *low_power) {
    const bool video_codec_auto = strcmp(video_codec_to_use, "auto") == 0;
    if(video_codec_auto) {
        if(strcmp(file_extension, "webm") == 0) {
            fprintf(stderr, "Info: using vp8 encoder because a codec was not specified and the file extension is .webm\n");
            video_codec_to_use = "vp8";
            *video_codec = VideoCodec::VP8;
        } else {
            fprintf(stderr, "Info: using h264 encoder because a codec was not specified\n");
            video_codec_to_use = "h264";
            *video_codec = VideoCodec::H264;
        }
    }

    // TODO: Allow hevc, vp9 and av1 in (enhanced) flv (supported since ffmpeg 6.1)
    const bool is_flv = strcmp(file_extension, "flv") == 0;
    if(is_flv) {
        if(*video_codec != VideoCodec::H264) {
            video_codec_to_use = "h264";
            *video_codec = VideoCodec::H264;
            fprintf(stderr, "Warning: hevc/av1 is not compatible with flv, falling back to h264 instead.\n");
        }

        // if(audio_codec != AudioCodec::AAC) {
        //     audio_codec_to_use = "aac";
        //     audio_codec = AudioCodec::AAC;
        //     fprintf(stderr, "Warning: flv only supports aac, falling back to aac instead.\n");
        // }
    }

    const bool is_hls = strcmp(file_extension, "m3u8") == 0;
    if(is_hls) {
        if(video_codec_is_av1(*video_codec)) {
            video_codec_to_use = "hevc";
            *video_codec = VideoCodec::HEVC;
            fprintf(stderr, "Warning: av1 is not compatible with hls (m3u8), falling back to hevc instead.\n");
        }

        // if(audio_codec != AudioCodec::AAC) {
        //     audio_codec_to_use = "aac";
        //     audio_codec = AudioCodec::AAC;
        //     fprintf(stderr, "Warning: hls (m3u8) only supports aac, falling back to aac instead.\n");
        // }
    }

    if(use_software_video_encoder && *video_codec != VideoCodec::H264) {
        fprintf(stderr, "Error: \"-encoder cpu\" option is currently only available when using h264 codec option (-k)\n");
        usage();
    }

    return pick_video_codec(video_codec, egl, use_software_video_encoder, video_codec_auto, video_codec_to_use, is_flv, low_power);
}

static std::vector<AudioDeviceData> create_device_audio_inputs(const std::vector<AudioInput> &audio_inputs, AVCodecContext *audio_codec_context, int num_channels, double num_audio_frames_shift, std::vector<AVFilterContext*> &src_filter_ctx, bool use_amix) {
    std::vector<AudioDeviceData> audio_track_audio_devices;
    for(size_t i = 0; i < audio_inputs.size(); ++i) {
        const auto &audio_input = audio_inputs[i];
        AVFilterContext *src_ctx = nullptr;
        if(use_amix)
            src_ctx = src_filter_ctx[i];

        AudioDeviceData audio_device;
        audio_device.audio_input = audio_input;
        audio_device.src_filter_ctx = src_ctx;

        if(audio_input.name.empty()) {
            audio_device.sound_device.handle = NULL;
            audio_device.sound_device.frames = 0;
        } else {
            const std::string description = "gsr-" + audio_input.name;
            if(sound_device_get_by_name(&audio_device.sound_device, audio_input.name.c_str(), description.c_str(), num_channels, audio_codec_context->frame_size, audio_codec_context_get_audio_format(audio_codec_context)) != 0) {
                fprintf(stderr, "Error: failed to get \"%s\" audio device\n", audio_input.name.c_str());
                _exit(1);
            }
        }

        audio_device.frame = create_audio_frame(audio_codec_context);
        audio_device.frame->pts = -audio_codec_context->frame_size * num_audio_frames_shift;

        audio_track_audio_devices.push_back(std::move(audio_device));
    }
    return audio_track_audio_devices;
}

#ifdef GSR_APP_AUDIO
static AudioDeviceData create_application_audio_audio_input(const MergedAudioInputs &merged_audio_inputs, AVCodecContext *audio_codec_context, int num_channels, double num_audio_frames_shift, gsr_pipewire_audio *pipewire_audio) {
    AudioDeviceData audio_device;
    audio_device.frame = create_audio_frame(audio_codec_context);
    audio_device.frame->pts = -audio_codec_context->frame_size * num_audio_frames_shift;

    char random_str[8];
    if(!generate_random_characters_standard_alphabet(random_str, sizeof(random_str))) {
        fprintf(stderr, "gsr error: failed to generate random string\n");
        _exit(1);
    }
    std::string combined_sink_name = "gsr-combined-";
    combined_sink_name.append(random_str, sizeof(random_str));

    if(!gsr_pipewire_audio_create_virtual_sink(pipewire_audio, combined_sink_name.c_str())) {
        fprintf(stderr, "gsr error: failed to create virtual sink for application audio\n");
        _exit(1);
    }

    combined_sink_name += ".monitor";

    if(sound_device_get_by_name(&audio_device.sound_device, combined_sink_name.c_str(), "gpu-screen-recorder", num_channels, audio_codec_context->frame_size, audio_codec_context_get_audio_format(audio_codec_context)) != 0) {
        fprintf(stderr, "Error: failed to setup audio recording to combined sink\n");
        _exit(1);
    }

    std::vector<const char*> audio_devices_sources;
    for(const auto &audio_input : merged_audio_inputs.audio_inputs) {
        if(audio_input.type == AudioInputType::DEVICE)
            audio_devices_sources.push_back(audio_input.name.c_str());
    }

    bool app_audio_inverted = false;
    std::vector<const char*> app_names;
    for(const auto &audio_input : merged_audio_inputs.audio_inputs) {
        if(audio_input.type == AudioInputType::APPLICATION) {
            app_names.push_back(audio_input.name.c_str());
            app_audio_inverted = audio_input.inverted;
        }
    }

    if(!audio_devices_sources.empty()) {
        if(!gsr_pipewire_audio_add_link_from_sources_to_sink(pipewire_audio, audio_devices_sources.data(), audio_devices_sources.size(), combined_sink_name.c_str())) {
            fprintf(stderr, "gsr error: failed to add application audio link\n");
            _exit(1);
        }
    }

    if(app_audio_inverted) {
        if(!gsr_pipewire_audio_add_link_from_apps_to_sink_inverted(pipewire_audio, app_names.data(), app_names.size(), combined_sink_name.c_str())) {
            fprintf(stderr, "gsr error: failed to add application audio link\n");
            _exit(1);
        }
    } else {
        if(!gsr_pipewire_audio_add_link_from_apps_to_sink(pipewire_audio, app_names.data(), app_names.size(), combined_sink_name.c_str())) {
            fprintf(stderr, "gsr error: failed to add application audio link\n");
            _exit(1);
        }
    }

    return audio_device;
}
#endif

int main(int argc, char **argv) {
    setlocale(LC_ALL, "C"); // Sigh... stupid C

    signal(SIGINT, stop_handler);
    signal(SIGUSR1, save_replay_handler);
    signal(SIGUSR2, toggle_pause_handler);

    // Stop nvidia driver from buffering frames
    setenv("__GL_MaxFramesAllowed", "1", true);
    // If this is set to 1 then cuGraphicsGLRegisterImage will fail for egl context with error: invalid OpenGL or DirectX context,
    // so we overwrite it
    setenv("__GL_THREADED_OPTIMIZATIONS", "0", true);
    // Forces low latency encoding mode. Use this environment variable until vaapi supports setting this as a parameter.
    // The downside of this is that it always uses maximum power, which is not ideal for replay mode that runs on system startup.
    // This option was added in mesa 24.1.4, released in july 17, 2024.
    // TODO: Add an option to enable/disable this?
    // Seems like the performance issue is not in encoding, but rendering the frame.
    // Some frames end up taking 10 times longer. Seems to be an issue with amd gpu power management when letting the application sleep on the cpu side?
    setenv("AMD_DEBUG", "lowlatencyenc", true);
    // Some people set this to nvidia (for nvdec) or vdpau (for nvidia vdpau), which breaks gpu screen recorder since
    // nvidia doesn't support vaapi and nvidia-vaapi-driver doesn't support encoding yet.
    // Let vaapi find the match vaapi driver instead of forcing a specific one.
    unsetenv("LIBVA_DRIVER_NAME");
    // Some people set this to force all applications to vsync on nvidia, but this makes eglSwapBuffers never return.
    unsetenv("__GL_SYNC_TO_VBLANK");
    // Same as above, but for amd/intel
    unsetenv("vblank_mode");

    if(geteuid() == 0) {
        fprintf(stderr, "Error: don't run gpu-screen-recorder as the root user\n");
        _exit(1);
    }

    if(argc <= 1)
        usage_full();

    if(argc == 2 && (strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0))
        usage_full();

    if(argc == 2 && strcmp(argv[1], "--info") == 0) {
        info_command();
        _exit(0);
    }

    if(argc == 2 && strcmp(argv[1], "--list-audio-devices") == 0) {
        list_audio_devices_command();
        _exit(0);
    }

    if(argc == 2 && strcmp(argv[1], "--list-application-audio") == 0) {
        list_application_audio_command();
        _exit(0);
    }

    if(argc == 2 && strcmp(argv[1], "--list-capture-options") == 0) {
        list_capture_options_command();
        _exit(0);
    }

    if(argc == 2 && strcmp(argv[1], "--version") == 0) {
        puts(GSR_VERSION);
        _exit(0);
    }

    //av_log_set_level(AV_LOG_TRACE);

    std::map<std::string, Arg> args = {
        { "-w", Arg { {}, false, false } },
        { "-c", Arg { {}, true, false } },
        { "-f", Arg { {}, false, false } },
        { "-s", Arg { {}, true, false } },
        { "-a", Arg { {}, true, true } },
        { "-q", Arg { {}, true, false } },
        { "-o", Arg { {}, true, false } },
        { "-r", Arg { {}, true, false } },
        { "-k", Arg { {}, true, false } },
        { "-ac", Arg { {}, true, false } },
        { "-ab", Arg { {}, true, false } },
        { "-oc", Arg { {}, true, false } },
        { "-fm", Arg { {}, true, false } },
        { "-bm", Arg { {}, true, false } },
        { "-pixfmt", Arg { {}, true, false } },
        { "-v", Arg { {}, true, false } },
        { "-df", Arg { {}, true, false } },
        { "-sc", Arg { {}, true, false } },
        { "-cr", Arg { {}, true, false } },
        { "-cursor", Arg { {}, true, false } },
        { "-keyint", Arg { {}, true, false } },
        { "-restore-portal-session", Arg { {}, true, false } },
        { "-portal-session-token-filepath", Arg { {}, true, false } },
        { "-encoder", Arg { {}, true, false } },
    };

    for(int i = 1; i < argc; i += 2) {
        auto it = args.find(argv[i]);
        if(it == args.end()) {
            fprintf(stderr, "Invalid argument '%s'\n", argv[i]);
            usage();
        }

        if(!it->second.values.empty() && !it->second.list) {
            fprintf(stderr, "Expected argument '%s' to only be specified once\n", argv[i]);
            usage();
        }

        if(i + 1 >= argc) {
            fprintf(stderr, "Missing value for argument '%s'\n", argv[i]);
            usage();
        }

        it->second.values.push_back(argv[i + 1]);
    }

    for(auto &it : args) {
        if(!it.second.optional && !it.second.value()) {
            fprintf(stderr, "Missing argument '%s'\n", it.first.c_str());
            usage();
        }
    }

    VideoCodec video_codec = VideoCodec::H264;
    const char *video_codec_to_use = args["-k"].value();
    if(!video_codec_to_use)
        video_codec_to_use = "auto";

    if(strcmp(video_codec_to_use, "h264") == 0) {
        video_codec = VideoCodec::H264;
    } else if(strcmp(video_codec_to_use, "h265") == 0 || strcmp(video_codec_to_use, "hevc") == 0) {
        video_codec = VideoCodec::HEVC;
    } else if(strcmp(video_codec_to_use, "hevc_hdr") == 0) {
        video_codec = VideoCodec::HEVC_HDR;
    } else if(strcmp(video_codec_to_use, "hevc_10bit") == 0) {
        video_codec = VideoCodec::HEVC_10BIT;
    } else if(strcmp(video_codec_to_use, "av1") == 0) {
        video_codec = VideoCodec::AV1;
    } else if(strcmp(video_codec_to_use, "av1_hdr") == 0) {
        video_codec = VideoCodec::AV1_HDR;
    } else if(strcmp(video_codec_to_use, "av1_10bit") == 0) {
        video_codec = VideoCodec::AV1_10BIT;
    } else if(strcmp(video_codec_to_use, "vp8") == 0) {
        video_codec = VideoCodec::VP8;
    } else if(strcmp(video_codec_to_use, "vp9") == 0) {
        video_codec = VideoCodec::VP9;
    //} else if(strcmp(video_codec_to_use, "h264_vulkan") == 0) {
    //    video_codec = VideoCodec::H264_VULKAN;
    //} else if(strcmp(video_codec_to_use, "hevc_vulkan") == 0) {
    //    video_codec = VideoCodec::HEVC_VULKAN;
    } else if(strcmp(video_codec_to_use, "auto") != 0) {
        fprintf(stderr, "Error: -k should either be either 'auto', 'h264', 'hevc', 'av1', 'vp8', 'vp9', 'hevc_hdr', 'av1_hdr', 'hevc_10bit' or 'av1_10bit', got: '%s'\n", video_codec_to_use);
        usage();
    }

    AudioCodec audio_codec = AudioCodec::OPUS;
    const char *audio_codec_to_use = args["-ac"].value();
    if(!audio_codec_to_use)
        audio_codec_to_use = "opus";

    if(strcmp(audio_codec_to_use, "aac") == 0) {
        audio_codec = AudioCodec::AAC;
    } else if(strcmp(audio_codec_to_use, "opus") == 0) {
        audio_codec = AudioCodec::OPUS;
    } else if(strcmp(audio_codec_to_use, "flac") == 0) {
        audio_codec = AudioCodec::FLAC;
    } else {
        fprintf(stderr, "Error: -ac should either be either 'aac', 'opus' or 'flac', got: '%s'\n", audio_codec_to_use);
        usage();
    }

    if(audio_codec == AudioCodec::FLAC) {
        fprintf(stderr, "Warning: flac audio codec is temporary disabled, using opus audio codec instead\n");
        audio_codec_to_use = "opus";
        audio_codec = AudioCodec::OPUS;
    }

    int64_t audio_bitrate = 0;
    const char *audio_bitrate_str = args["-ab"].value();
    if(audio_bitrate_str) {
        if(sscanf(audio_bitrate_str, "%" PRIi64, &audio_bitrate) != 1) {
            fprintf(stderr, "Error: -ab argument \"%s\" is not an integer\n", audio_bitrate_str);
            usage();
        }

        if(audio_bitrate < 0) {
            fprintf(stderr, "Error: -ab is expected to be 0 or larger, got %" PRIi64 "\n", audio_bitrate);
            usage();
        }

        if(audio_bitrate > 50000) {
            fprintf(stderr, "Error: audio bitrate %" PRIi64 "is too high. It's expected to be in kbps, normally in the range 54-300\n", audio_bitrate);
            usage();
        }

        audio_bitrate *= 1000LL;
    }

    float keyint = 2.0;
    const char *keyint_str = args["-keyint"].value();
    if(keyint_str) {
        if(sscanf(keyint_str, "%f", &keyint) != 1) {
            fprintf(stderr, "Error: -keyint argument \"%s\" is not a floating point number\n", keyint_str);
            usage();
        }

        if(keyint < 0) {
            fprintf(stderr, "Error: -keyint is expected to be 0 or larger, got %f\n", keyint);
            usage();
        }
    }

    bool use_software_video_encoder = false;
    const char *encoder_str = args["-encoder"].value();
    if(encoder_str) {
        if(strcmp(encoder_str, "gpu") == 0) {
            use_software_video_encoder = false;
        } else if(strcmp(encoder_str, "cpu") == 0) {
            use_software_video_encoder = true;
        } else {
            fprintf(stderr, "Error: -encoder is expected to be 'gpu' or 'cpu', was '%s'\n", encoder_str);
            usage();
        }
    }

    bool overclock = false;
    const char *overclock_str = args["-oc"].value();
    if(!overclock_str)
        overclock_str = "no";

    if(strcmp(overclock_str, "yes") == 0) {
        overclock = true;
    } else if(strcmp(overclock_str, "no") == 0) {
        overclock = false;
    } else {
        fprintf(stderr, "Error: -oc should either be either 'yes' or 'no', got: '%s'\n", overclock_str);
        usage();
    }

    bool verbose = true;
    const char *verbose_str = args["-v"].value();
    if(!verbose_str)
        verbose_str = "yes";

    if(strcmp(verbose_str, "yes") == 0) {
        verbose = true;
    } else if(strcmp(verbose_str, "no") == 0) {
        verbose = false;
    } else {
        fprintf(stderr, "Error: -v should either be either 'yes' or 'no', got: '%s'\n", verbose_str);
        usage();
    }

    bool record_cursor = true;
    const char *record_cursor_str = args["-cursor"].value();
    if(!record_cursor_str)
        record_cursor_str = "yes";

    if(strcmp(record_cursor_str, "yes") == 0) {
        record_cursor = true;
    } else if(strcmp(record_cursor_str, "no") == 0) {
        record_cursor = false;
    } else {
        fprintf(stderr, "Error: -cursor should either be either 'yes' or 'no', got: '%s'\n", record_cursor_str);
        usage();
    }

    bool date_folders = false;
    const char *date_folders_str = args["-df"].value();
    if(!date_folders_str)
        date_folders_str = "no";

    if(strcmp(date_folders_str, "yes") == 0) {
        date_folders = true;
    } else if(strcmp(date_folders_str, "no") == 0) {
        date_folders = false;
    } else {
        fprintf(stderr, "Error: -df should either be either 'yes' or 'no', got: '%s'\n", date_folders_str);
        usage();
    }

    bool restore_portal_session = false;
    const char *restore_portal_session_str = args["-restore-portal-session"].value();
    if(!restore_portal_session_str)
        restore_portal_session_str = "no";

    if(strcmp(restore_portal_session_str, "yes") == 0) {
        restore_portal_session = true;
    } else if(strcmp(restore_portal_session_str, "no") == 0) {
        restore_portal_session = false;
    } else {
        fprintf(stderr, "Error: -restore-portal-session should either be either 'yes' or 'no', got: '%s'\n", restore_portal_session_str);
        usage();
    }

    const char *portal_session_token_filepath = args["-portal-session-token-filepath"].value();
    if(portal_session_token_filepath) {
        int len = strlen(portal_session_token_filepath);
        if(len > 0 && portal_session_token_filepath[len - 1] == '/') {
            fprintf(stderr, "Error: -portal-session-token-filepath should be a path to a file but it ends with a /: %s\n", portal_session_token_filepath);
            _exit(1);
        }
    }

    const char *recording_saved_script = args["-sc"].value();
    if(recording_saved_script) {
        struct stat buf;
        if(stat(recording_saved_script, &buf) == -1 || !S_ISREG(buf.st_mode)) {
            fprintf(stderr, "Error: Script \"%s\" either doesn't exist or it's not a file\n", recording_saved_script);
            usage();
        }

        if(!(buf.st_mode & S_IXUSR)) {
            fprintf(stderr, "Error: Script \"%s\" is not executable\n", recording_saved_script);
            usage();
        }
    }

    PixelFormat pixel_format = PixelFormat::YUV420;
    const char *pixfmt = args["-pixfmt"].value();
    if(!pixfmt)
        pixfmt = "yuv420";

    if(strcmp(pixfmt, "yuv420") == 0) {
        pixel_format = PixelFormat::YUV420;
    } else if(strcmp(pixfmt, "yuv444") == 0) {
        pixel_format = PixelFormat::YUV444;
    } else {
        fprintf(stderr, "Error: -pixfmt should either be either 'yuv420', or 'yuv444', got: '%s'\n", pixfmt);
        usage();
    }

    const Arg &audio_input_arg = args["-a"];

    AudioDevices audio_devices;
    if(!audio_input_arg.values.empty())
        audio_devices = get_pulseaudio_inputs();

    std::vector<MergedAudioInputs> requested_audio_inputs = parse_audio_inputs(audio_devices, audio_input_arg);

    const bool uses_app_audio = merged_audio_inputs_has_app_audio(requested_audio_inputs);
    std::vector<std::string> app_audio_names;
#ifdef GSR_APP_AUDIO
    gsr_pipewire_audio pipewire_audio;
    memset(&pipewire_audio, 0, sizeof(pipewire_audio));
    if(uses_app_audio) {
        if(!pulseaudio_server_is_pipewire()) {
            fprintf(stderr, "gsr error: your sound server is not PipeWire. Application audio is only available when running PipeWire audio server\n");
            _exit(2);
        }

        if(!gsr_pipewire_audio_init(&pipewire_audio)) {
            fprintf(stderr, "gsr error: failed to setup PipeWire audio for application audio capture\n");
            _exit(2);
        }

        gsr_pipewire_audio_for_each_app(&pipewire_audio, [](const char *app_name, void *userdata) {
            std::vector<std::string> *app_audio_names = (std::vector<std::string>*)userdata;
            app_audio_names->push_back(app_name);
            return true;
        }, &app_audio_names);
    }
#endif

    validate_merged_audio_inputs_app_audio(requested_audio_inputs, app_audio_names);

    const char *container_format = args["-c"].value();
    if(container_format && strcmp(container_format, "mkv") == 0)
        container_format = "matroska";

    int fps = atoi(args["-f"].value());
    if(fps == 0) {
        fprintf(stderr, "Invalid fps argument: %s\n", args["-f"].value());
        _exit(1);
    }
    if(fps < 1)
        fps = 1;

    int replay_buffer_size_secs = -1;
    const char *replay_buffer_size_secs_str = args["-r"].value();
    if(replay_buffer_size_secs_str) {
        replay_buffer_size_secs = atoi(replay_buffer_size_secs_str);
        if(replay_buffer_size_secs < 5 || replay_buffer_size_secs > 1200) {
            fprintf(stderr, "Error: option -r has to be between 5 and 1200, was: %s\n", replay_buffer_size_secs_str);
            _exit(1);
        }
        replay_buffer_size_secs += std::ceil(keyint); // Add a few seconds to account of lost packets because of non-keyframe packets skipped
    }

    std::string window_str = args["-w"].value();
    const bool is_portal_capture = strcmp(window_str.c_str(), "portal") == 0;

    if(!restore_portal_session && is_portal_capture) {
        fprintf(stderr, "gsr info: option '-w portal' was used without '-restore-portal-session yes'. The previous screencast session will be ignored\n");
    }

    bool wayland = false;
    Display *dpy = XOpenDisplay(nullptr);
    if (!dpy) {
        wayland = true;
        fprintf(stderr, "Warning: failed to connect to the X server. Assuming wayland is running without Xwayland\n");
    }

    XSetErrorHandler(x11_error_handler);
    XSetIOErrorHandler(x11_io_error_handler);

    if(!wayland)
        wayland = is_xwayland(dpy);

    if(!wayland && is_using_prime_run()) {
        // Disable prime-run and similar options as it doesn't work, the monitor to capture has to be run on the same device.
        // This is fine on wayland since nvidia uses drm interface there and the monitor query checks the monitors connected
        // to the drm device.
        fprintf(stderr, "Warning: use of prime-run on X11 is not supported. Disabling prime-run\n");
        disable_prime_run();
    }

    gsr_window *window = gsr_window_create(dpy, wayland);
    if(!window) {
        fprintf(stderr, "Error: failed to create window\n");
        _exit(1);
    }

    if(is_portal_capture && is_using_prime_run()) {
        fprintf(stderr, "Warning: use of prime-run with -w portal option is currently not supported. Disabling prime-run\n");
        disable_prime_run();
    }

    if(video_codec_is_hdr(video_codec) && !wayland) {
        fprintf(stderr, "Error: hdr video codec option %s is not available on X11\n", video_codec_to_use);
        _exit(1);
    }

    const bool is_monitor_capture = strcmp(window_str.c_str(), "focused") != 0 && !is_portal_capture && contains_non_hex_number(window_str.c_str());
    gsr_egl egl;
    if(!gsr_egl_load(&egl, window, is_monitor_capture)) {
        fprintf(stderr, "gsr error: failed to load opengl\n");
        _exit(1);
    }

    if(egl.gpu_info.is_steam_deck) {
        fprintf(stderr, "gsr warning: steam deck has multiple driver issues. One of them has been reported here: https://github.com/ValveSoftware/SteamOS/issues/1609\n"
            "If you have issues with GPU Screen Recorder on steam deck that you don't have on a desktop computer then report the issue to Valve and/or AMD.\n");
    }

    bool very_old_gpu = false;

    if(egl.gpu_info.vendor == GSR_GPU_VENDOR_NVIDIA && egl.gpu_info.gpu_version != 0 && egl.gpu_info.gpu_version < 900) {
        fprintf(stderr, "Info: your gpu appears to be very old (older than maxwell architecture). Switching to lower preset\n");
        very_old_gpu = true;
    }

    if(egl.gpu_info.vendor != GSR_GPU_VENDOR_NVIDIA && overclock) {
        fprintf(stderr, "Info: overclock option has no effect on amd/intel, ignoring option\n");
        overclock = false;
    }

    if(egl.gpu_info.vendor == GSR_GPU_VENDOR_NVIDIA && overclock && wayland) {
        fprintf(stderr, "Info: overclocking is not possible on nvidia on wayland, ignoring option\n");
        overclock = false;
    }

    egl.card_path[0] = '\0';
    if(monitor_capture_use_drm(&egl)) {
        // TODO: Allow specifying another card, and in other places
        if(!gsr_get_valid_card_path(&egl, egl.card_path, is_monitor_capture)) {
            fprintf(stderr, "Error: no /dev/dri/cardX device found. Make sure that you have at least one monitor connected or record a single window instead on X11 or record with the -w portal option\n");
            _exit(2);
        }
    }

    // if(wayland && is_monitor_capture) {
    //     fprintf(stderr, "gsr warning: it's not possible to sync video to recorded monitor exactly on wayland when recording a monitor."
    //         " If you experience stutter in the video then record with portal capture option instead (-w portal) or use X11 instead\n");
    // }

    // TODO: Fix constant framerate not working properly on amd/intel because capture framerate gets locked to the same framerate as
    // game framerate, which doesn't work well when you need to encode multiple duplicate frames (AMD/Intel is slow at encoding!).
    // It also appears to skip audio frames on nvidia wayland? why? that should be fine, but it causes video stuttering because of audio/video sync.
    FramerateMode framerate_mode = FramerateMode::VARIABLE;
    const char *framerate_mode_str = args["-fm"].value();
    if(!framerate_mode_str)
        framerate_mode_str = "vfr";

    if(strcmp(framerate_mode_str, "cfr") == 0) {
        framerate_mode = FramerateMode::CONSTANT;
    } else if(strcmp(framerate_mode_str, "vfr") == 0) {
        framerate_mode = FramerateMode::VARIABLE;
    } else if(strcmp(framerate_mode_str, "content") == 0) {
        framerate_mode = FramerateMode::CONTENT;
    } else {
        fprintf(stderr, "Error: -fm should either be either 'cfr', 'vfr' or 'content', got: '%s'\n", framerate_mode_str);
        usage();
    }

    if(framerate_mode == FramerateMode::CONTENT && wayland && !is_portal_capture) {
        fprintf(stderr, "Error: -fm 'content' is currently only supported on X11 or when using portal capture option\n");
        usage();
    }

    BitrateMode bitrate_mode = BitrateMode::QP;
    const char *bitrate_mode_str = args["-bm"].value();
    if(!bitrate_mode_str)
        bitrate_mode_str = "auto";

    if(strcmp(bitrate_mode_str, "qp") == 0) {
        bitrate_mode = BitrateMode::QP;
    } else if(strcmp(bitrate_mode_str, "vbr") == 0) {
        bitrate_mode = BitrateMode::VBR;
    } else if(strcmp(bitrate_mode_str, "cbr") == 0) {
        bitrate_mode = BitrateMode::CBR;
    } else if(strcmp(bitrate_mode_str, "auto") != 0) {
        fprintf(stderr, "Error: -bm should either be either 'auto', 'qp', 'vbr' or 'cbr', got: '%s'\n", bitrate_mode_str);
        usage();
    }

    if(strcmp(bitrate_mode_str, "auto") == 0) {
        // QP is broken on steam deck, see https://github.com/ValveSoftware/SteamOS/issues/1609
        bitrate_mode = egl.gpu_info.is_steam_deck ? BitrateMode::VBR : BitrateMode::QP;
    }

    if(egl.gpu_info.is_steam_deck && bitrate_mode == BitrateMode::QP) {
        fprintf(stderr, "Warning: qp bitrate mode is not supported on Steam Deck because of Steam Deck driver bugs. Using vbr instead\n");
        bitrate_mode = BitrateMode::VBR;
    }

    if(use_software_video_encoder && bitrate_mode == BitrateMode::VBR) {
        fprintf(stderr, "Warning: bitrate mode has been forcefully set to qp because software encoding option doesn't support vbr option\n");
        bitrate_mode = BitrateMode::QP;
    }

    const char *quality_str = args["-q"].value();
    VideoQuality quality = VideoQuality::VERY_HIGH;
    int64_t video_bitrate = 0;

    if(bitrate_mode == BitrateMode::CBR) {
        if(!quality_str) {
            fprintf(stderr, "Error: option '-q' is required when using '-bm cbr' option\n");
            usage();
        }

        if(sscanf(quality_str, "%" PRIi64, &video_bitrate) != 1) {
            fprintf(stderr, "Error: -q argument \"%s\" is not an integer value. When using '-bm cbr' option '-q' is expected to be an integer value\n", quality_str);
            usage();
        }

        if(video_bitrate < 0) {
            fprintf(stderr, "Error: -q is expected to be 0 or larger, got %" PRIi64 "\n", video_bitrate);
            usage();
        }

        video_bitrate *= 1000LL;
    } else {
        if(!quality_str)
            quality_str = "very_high";

        if(strcmp(quality_str, "medium") == 0) {
            quality = VideoQuality::MEDIUM;
        } else if(strcmp(quality_str, "high") == 0) {
            quality = VideoQuality::HIGH;
        } else if(strcmp(quality_str, "very_high") == 0) {
            quality = VideoQuality::VERY_HIGH;
        } else if(strcmp(quality_str, "ultra") == 0) {
            quality = VideoQuality::ULTRA;
        } else {
            fprintf(stderr, "Error: -q should either be either 'medium', 'high', 'very_high' or 'ultra', got: '%s'\n", quality_str);
            usage();
        }
    }

    gsr_color_range color_range = GSR_COLOR_RANGE_LIMITED;
    const char *color_range_str = args["-cr"].value();
    if(!color_range_str)
        color_range_str = "limited";

    if(strcmp(color_range_str, "limited") == 0) {
        color_range = GSR_COLOR_RANGE_LIMITED;
    } else if(strcmp(color_range_str, "full") == 0) {
        color_range = GSR_COLOR_RANGE_FULL;
    } else {
        fprintf(stderr, "Error: -cr should either be either 'limited' or 'full', got: '%s'\n", color_range_str);
        usage();
    }

    const char *output_resolution_str = args["-s"].value();
    if(!output_resolution_str && strcmp(window_str.c_str(), "focused") == 0) {
        fprintf(stderr, "Error: option -s is required when using -w focused option\n");
        usage();
    }

    vec2i output_resolution = {0, 0};
    if(output_resolution_str) {
        if(sscanf(output_resolution_str, "%dx%d", &output_resolution.x, &output_resolution.y) != 2) {
            fprintf(stderr, "Error: invalid value for option -s '%s', expected a value in format WxH\n", output_resolution_str);
            usage();
        }

        if(output_resolution.x < 0 || output_resolution.y < 0) {
            fprintf(stderr, "Error: invalud value for option -s '%s', expected width and height to be greater or equal to 0\n", output_resolution_str);
            usage();
        }
    }

    bool is_livestream = false;
    const char *filename = args["-o"].value();
    if(filename) {
        is_livestream = is_livestream_path(filename);
        if(is_livestream) {
            if(replay_buffer_size_secs != -1) {
                fprintf(stderr, "Error: replay mode is not applicable to live streaming\n");
                _exit(1);
            }
        } else {
            if(replay_buffer_size_secs == -1) {
                char directory_buf[PATH_MAX];
                snprintf(directory_buf, sizeof(directory_buf), "%s", filename);
                char *directory = dirname(directory_buf);
                if(strcmp(directory, ".") != 0 && strcmp(directory, "/") != 0) {
                    if(create_directory_recursive(directory) != 0) {
                        fprintf(stderr, "Error: failed to create directory for output file: %s\n", filename);
                        _exit(1);
                    }
                }
            } else {
                if(!container_format) {
                    fprintf(stderr, "Error: option -c is required when using option -r\n");
                    usage();
                }

                struct stat buf;
                if(stat(filename, &buf) != -1 && !S_ISDIR(buf.st_mode)) {
                    fprintf(stderr, "Error: File \"%s\" exists but it's not a directory\n", filename);
                    usage();
                }
            }
        }
    } else {
        if(replay_buffer_size_secs == -1) {
            filename = "/dev/stdout";
        } else {
            fprintf(stderr, "Error: Option -o is required when using option -r\n");
            usage();
        }

        if(!container_format) {
            fprintf(stderr, "Error: option -c is required when not using option -o\n");
            usage();
        }
    }

    const bool is_output_piped = strcmp(filename, "/dev/stdout") == 0;

    AVFormatContext *av_format_context;
    // The output format is automatically guessed by the file extension
    avformat_alloc_output_context2(&av_format_context, nullptr, container_format, filename);
    if (!av_format_context) {
        if(container_format) {
            fprintf(stderr, "Error: Container format '%s' (argument -c) is not valid\n", container_format);
        } else {
            fprintf(stderr, "Error: Failed to deduce container format from file extension. Use the '-c' option to specify container format\n");
            usage();
        }
        _exit(1);
    }

    const AVOutputFormat *output_format = av_format_context->oformat;

    std::string file_extension = output_format->extensions;
    {
        size_t comma_index = file_extension.find(',');
        if(comma_index != std::string::npos)
            file_extension = file_extension.substr(0, comma_index);
    }

    const bool force_no_audio_offset = is_livestream || is_output_piped || (file_extension != "mp4" && file_extension != "mkv" && file_extension != "webm");
    const double target_fps = 1.0 / (double)fps;

    if(video_codec_is_hdr(video_codec) && is_portal_capture) {
        fprintf(stderr, "Warning: portal capture option doesn't support hdr yet (PipeWire doesn't support hdr), the video will be tonemapped from hdr to sdr\n");
        video_codec = hdr_video_codec_to_sdr_video_codec(video_codec);
    }

    const bool uses_amix = merged_audio_inputs_should_use_amix(requested_audio_inputs);
    audio_codec = select_audio_codec_with_fallback(audio_codec, file_extension, uses_amix);
    bool low_power = false;
    const AVCodec *video_codec_f = select_video_codec_with_fallback(&video_codec, video_codec_to_use, file_extension.c_str(), use_software_video_encoder, &egl, &low_power);

    const gsr_color_depth color_depth = video_codec_to_bit_depth(video_codec);
    gsr_capture *capture = create_capture_impl(window_str, output_resolution, wayland, &egl, fps, video_codec, color_range, record_cursor, use_software_video_encoder, restore_portal_session, portal_session_token_filepath, color_depth);

    // (Some?) livestreaming services require at least one audio track to work.
    // If not audio is provided then create one silent audio track.
    if(is_livestream && requested_audio_inputs.empty()) {
        fprintf(stderr, "Info: live streaming but no audio track was added. Adding a silent audio track\n");
        MergedAudioInputs mai;
        mai.audio_inputs.push_back({""});
        requested_audio_inputs.push_back(std::move(mai));
    }

    if(is_livestream && recording_saved_script) {
        fprintf(stderr, "Warning: live stream detected, -sc script is ignored\n");
        recording_saved_script = nullptr;
    }

    AVStream *video_stream = nullptr;
    std::vector<AudioTrack> audio_tracks;
    const bool hdr = video_codec_is_hdr(video_codec);
    const bool low_latency_recording = is_livestream || is_output_piped;

    const enum AVPixelFormat video_pix_fmt = get_pixel_format(video_codec, egl.gpu_info.vendor, use_software_video_encoder);
    AVCodecContext *video_codec_context = create_video_codec_context(video_pix_fmt, quality, fps, video_codec_f, low_latency_recording, egl.gpu_info.vendor, framerate_mode, hdr, color_range, keyint, use_software_video_encoder, bitrate_mode, video_codec, video_bitrate);
    if(replay_buffer_size_secs == -1)
        video_stream = create_stream(av_format_context, video_codec_context);

    AVFrame *video_frame = av_frame_alloc();
    if(!video_frame) {
        fprintf(stderr, "Error: Failed to allocate video frame\n");
        _exit(1);
    }
    video_frame->format = video_codec_context->pix_fmt;
    video_frame->width = video_codec_context->width;
    video_frame->height = video_codec_context->height;
    video_frame->color_range = video_codec_context->color_range;
    video_frame->color_primaries = video_codec_context->color_primaries;
    video_frame->color_trc = video_codec_context->color_trc;
    video_frame->colorspace = video_codec_context->colorspace;
    video_frame->chroma_location = video_codec_context->chroma_sample_location;

    int capture_result = gsr_capture_start(capture, video_codec_context, video_frame);
    if(capture_result != 0) {
        fprintf(stderr, "gsr error: gsr_capture_start failed\n");
        _exit(capture_result);
    }

    gsr_video_encoder *video_encoder = create_video_encoder(&egl, overclock, color_depth, use_software_video_encoder, video_codec);
    if(!video_encoder) {
        fprintf(stderr, "Error: failed to create video encoder\n");
        _exit(1);
    }

    if(!gsr_video_encoder_start(video_encoder, video_codec_context, video_frame)) {
        fprintf(stderr, "Error: failed to start video encoder\n");
        _exit(1);
    }

    gsr_color_conversion_params color_conversion_params;
    memset(&color_conversion_params, 0, sizeof(color_conversion_params));
    color_conversion_params.color_range = color_range;
    color_conversion_params.egl = &egl;
    color_conversion_params.load_external_image_shader = gsr_capture_uses_external_image(capture);
    gsr_video_encoder_get_textures(video_encoder, color_conversion_params.destination_textures, &color_conversion_params.num_destination_textures, &color_conversion_params.destination_color);

    gsr_color_conversion color_conversion;
    if(gsr_color_conversion_init(&color_conversion, &color_conversion_params) != 0) {
        fprintf(stderr, "gsr error: gsr_capture_kms_setup_vaapi_textures: failed to create color conversion\n");
        _exit(1);
    }

    gsr_color_conversion_clear(&color_conversion);

    if(use_software_video_encoder) {
        open_video_software(video_codec_context, quality, pixel_format, hdr, color_depth, bitrate_mode);
    } else {
        open_video_hardware(video_codec_context, quality, very_old_gpu, egl.gpu_info.vendor, pixel_format, hdr, color_depth, bitrate_mode, video_codec, low_power);
    }
    if(video_stream)
        avcodec_parameters_from_context(video_stream->codecpar, video_codec_context);

    int audio_max_frame_size = 1024;
    int audio_stream_index = VIDEO_STREAM_INDEX + 1;
    for(const MergedAudioInputs &merged_audio_inputs : requested_audio_inputs) {
        const bool use_amix = audio_inputs_should_use_amix(merged_audio_inputs.audio_inputs);
        AVCodecContext *audio_codec_context = create_audio_codec_context(fps, audio_codec, use_amix, audio_bitrate);

        AVStream *audio_stream = nullptr;
        if(replay_buffer_size_secs == -1)
            audio_stream = create_stream(av_format_context, audio_codec_context);

        if(audio_stream && !merged_audio_inputs.track_name.empty())
            av_dict_set(&audio_stream->metadata, "title", merged_audio_inputs.track_name.c_str(), 0);

        open_audio(audio_codec_context);
        if(audio_stream)
            avcodec_parameters_from_context(audio_stream->codecpar, audio_codec_context);

        #if LIBAVCODEC_VERSION_MAJOR < 60
        const int num_channels = audio_codec_context->channels;
        #else
        const int num_channels = audio_codec_context->ch_layout.nb_channels;
        #endif

        //audio_frame->sample_rate = audio_codec_context->sample_rate;

        std::vector<AVFilterContext*> src_filter_ctx;
        AVFilterGraph *graph = nullptr;
        AVFilterContext *sink = nullptr;
        if(use_amix) {
            int err = init_filter_graph(audio_codec_context, &graph, &sink, src_filter_ctx, merged_audio_inputs.audio_inputs.size());
            if(err < 0) {
                fprintf(stderr, "Error: failed to create audio filter\n");
                _exit(1);
            }
        }

        // TODO: Cleanup above

        const double audio_fps = (double)audio_codec_context->sample_rate / (double)audio_codec_context->frame_size;
        const double timeout_sec = 1000.0 / audio_fps / 1000.0;

        const double audio_startup_time_seconds = force_no_audio_offset ? 0 : audio_codec_get_desired_delay(audio_codec, fps);// * ((double)audio_codec_context->frame_size / 1024.0);
        const double num_audio_frames_shift = audio_startup_time_seconds / timeout_sec;

        std::vector<AudioDeviceData> audio_track_audio_devices;
        if(audio_inputs_has_app_audio(merged_audio_inputs.audio_inputs)) {
            assert(!use_amix);
#ifdef GSR_APP_AUDIO
            audio_track_audio_devices.push_back(create_application_audio_audio_input(merged_audio_inputs, audio_codec_context, num_channels, num_audio_frames_shift, &pipewire_audio));
#endif
        } else {
            audio_track_audio_devices = create_device_audio_inputs(merged_audio_inputs.audio_inputs, audio_codec_context, num_channels, num_audio_frames_shift, src_filter_ctx, use_amix);
        }

        AudioTrack audio_track;
        audio_track.name = merged_audio_inputs.track_name;
        audio_track.codec_context = audio_codec_context;
        audio_track.stream = audio_stream;
        audio_track.audio_devices = std::move(audio_track_audio_devices);
        audio_track.graph = graph;
        audio_track.sink = sink;
        audio_track.stream_index = audio_stream_index;
        audio_track.pts = -audio_codec_context->frame_size * num_audio_frames_shift;
        audio_tracks.push_back(std::move(audio_track));
        ++audio_stream_index;

        audio_max_frame_size = std::max(audio_max_frame_size, audio_codec_context->frame_size);
    }

    //av_dump_format(av_format_context, 0, filename, 1);

    if (replay_buffer_size_secs == -1 && !(output_format->flags & AVFMT_NOFILE)) {
        int ret = avio_open(&av_format_context->pb, filename, AVIO_FLAG_WRITE);
        if (ret < 0) {
            fprintf(stderr, "Error: Could not open '%s': %s\n", filename, av_error_to_string(ret));
            _exit(1);
        }
    }

    if(replay_buffer_size_secs == -1) {
        AVDictionary *options = nullptr;
        av_dict_set(&options, "strict", "experimental", 0);
        //av_dict_set_int(&av_format_context->metadata, "video_full_range_flag", 1, 0);

        int ret = avformat_write_header(av_format_context, &options);
        if (ret < 0) {
            fprintf(stderr, "Error occurred when writing header to output file: %s\n", av_error_to_string(ret));
            _exit(1);
        }

        av_dict_free(&options);
    }

    double fps_start_time = clock_get_monotonic_seconds();
    //double frame_timer_start = fps_start_time;
    int fps_counter = 0;
    int damage_fps_counter = 0;

    bool paused = false;
    double paused_time_offset = 0.0;
    double paused_time_start = 0.0;

    std::mutex write_output_mutex;
    std::mutex audio_filter_mutex;

    const double record_start_time = clock_get_monotonic_seconds();
    std::deque<std::shared_ptr<PacketData>> frame_data_queue;
    bool frames_erased = false;

    const size_t audio_buffer_size = audio_max_frame_size * 4 * 2; // max 4 bytes/sample, 2 channels
    uint8_t *empty_audio = (uint8_t*)malloc(audio_buffer_size);
    if(!empty_audio) {
        fprintf(stderr, "Error: failed to create empty audio\n");
        _exit(1);
    }
    memset(empty_audio, 0, audio_buffer_size);

    for(AudioTrack &audio_track : audio_tracks) {
        for(AudioDeviceData &audio_device : audio_track.audio_devices) {
            audio_device.thread = std::thread([&]() mutable {
                const AVSampleFormat sound_device_sample_format = audio_format_to_sample_format(audio_codec_context_get_audio_format(audio_track.codec_context));
                // TODO: Always do conversion for now. This fixes issue with stuttering audio on pulseaudio with opus + multiple audio sources merged
                const bool needs_audio_conversion = true;//audio_track.codec_context->sample_fmt != sound_device_sample_format;
                SwrContext *swr = nullptr;
                if(needs_audio_conversion) {
                    swr = swr_alloc();
                    if(!swr) {
                        fprintf(stderr, "Failed to create SwrContext\n");
                        _exit(1);
                    }
                    #if LIBAVUTIL_VERSION_MAJOR <= 56
                    av_opt_set_channel_layout(swr, "in_channel_layout", AV_CH_LAYOUT_STEREO, 0);
                    av_opt_set_channel_layout(swr, "out_channel_layout", AV_CH_LAYOUT_STEREO, 0);
                    #elif LIBAVUTIL_VERSION_MAJOR >= 59
                    av_opt_set_chlayout(swr, "in_chlayout", &audio_track.codec_context->ch_layout, 0);
                    av_opt_set_chlayout(swr, "out_chlayout", &audio_track.codec_context->ch_layout, 0);
                    #else
                    av_opt_set_chlayout(swr, "in_channel_layout", &audio_track.codec_context->ch_layout, 0);
                    av_opt_set_chlayout(swr, "out_channel_layout", &audio_track.codec_context->ch_layout, 0);
                    #endif
                    av_opt_set_int(swr, "in_sample_rate", audio_track.codec_context->sample_rate, 0);
                    av_opt_set_int(swr, "out_sample_rate", audio_track.codec_context->sample_rate, 0);
                    av_opt_set_sample_fmt(swr, "in_sample_fmt", sound_device_sample_format, 0);
                    av_opt_set_sample_fmt(swr, "out_sample_fmt", audio_track.codec_context->sample_fmt, 0);
                    swr_init(swr);
                }

                const double audio_fps = (double)audio_track.codec_context->sample_rate / (double)audio_track.codec_context->frame_size;
                const int64_t timeout_ms = std::round(1000.0 / audio_fps);
                const double timeout_sec = 1000.0 / audio_fps / 1000.0;
                bool first_frame = true;
                int64_t num_received_frames = 0;

                while(running) {
                    void *sound_buffer;
                    int sound_buffer_size = -1;
                    //const double time_before_read_seconds = clock_get_monotonic_seconds();
                    if(audio_device.sound_device.handle) {
                        // TODO: use this instead of calculating time to read. But this can fluctuate and we dont want to go back in time,
                        // also it's 0.0 for some users???
                        double latency_seconds = 0.0;
                        sound_buffer_size = sound_device_read_next_chunk(&audio_device.sound_device, &sound_buffer, timeout_sec * 2.0, &latency_seconds);
                    }

                    const bool got_audio_data = sound_buffer_size >= 0;
                    //fprintf(stderr, "got audio data: %s\n", got_audio_data ? "yes" : "no");
                    //const double time_after_read_seconds = clock_get_monotonic_seconds();
                    //const double time_to_read_seconds = time_after_read_seconds - time_before_read_seconds;
                    //fprintf(stderr, "time to read: %f, %s, %f\n", time_to_read_seconds, got_audio_data ? "yes" : "no", timeout_sec);
                    const double this_audio_frame_time = clock_get_monotonic_seconds() - paused_time_offset;

                    if(paused) {
                        if(!audio_device.sound_device.handle)
                            av_usleep(timeout_ms * 1000);

                        continue;
                    }

                    int ret = av_frame_make_writable(audio_device.frame);
                    if (ret < 0) {
                        fprintf(stderr, "Failed to make audio frame writable\n");
                        break;
                    }

                    // TODO: Is this |received_audio_time| really correct?
                    const int64_t num_expected_frames = std::round((this_audio_frame_time - record_start_time) / timeout_sec);
                    int64_t num_missing_frames = std::max((int64_t)0LL, num_expected_frames - num_received_frames);

                    if(got_audio_data)
                        num_missing_frames = std::max((int64_t)0LL, num_missing_frames - 1);

                    if(!audio_device.sound_device.handle)
                        num_missing_frames = std::max((int64_t)1, num_missing_frames);

                    // Fucking hell is there a better way to do this? I JUST WANT TO KEEP VIDEO AND AUDIO SYNCED HOLY FUCK I WANT TO KILL MYSELF NOW.
                    // THIS PIECE OF SHIT WANTS EMPTY FRAMES OTHERWISE VIDEO PLAYS TOO FAST TO KEEP UP WITH AUDIO OR THE AUDIO PLAYS TOO EARLY.
                    // BUT WE CANT USE DELAYS TO GIVE DUMMY DATA BECAUSE PULSEAUDIO MIGHT GIVE AUDIO A BIG DELAYED!!!
                    // This garbage is needed because we want to produce constant frame rate videos instead of variable frame rate
                    // videos because bad software such as video editing software and VLC do not support variable frame rate software,
                    // despite nvidia shadowplay and xbox game bar producing variable frame rate videos.
                    // So we have to make sure we produce frames at the same relative rate as the video.
                    if((num_missing_frames >= 1 && got_audio_data) || num_missing_frames >= 5 || !audio_device.sound_device.handle) {
                        // TODO:
                        //audio_track.frame->data[0] = empty_audio;
                        if(first_frame || num_missing_frames >= 5) {
                            if(needs_audio_conversion)
                                swr_convert(swr, &audio_device.frame->data[0], audio_track.codec_context->frame_size, (const uint8_t**)&empty_audio, audio_track.codec_context->frame_size);
                            else
                                audio_device.frame->data[0] = empty_audio;
                        }
                        first_frame = false;

                        // TODO: Check if duplicate frame can be saved just by writing it with a different pts instead of sending it again
                        std::lock_guard<std::mutex> lock(audio_filter_mutex);
                        for(int i = 0; i < num_missing_frames; ++i) {
                            if(audio_track.graph) {
                                // TODO: av_buffersrc_add_frame
                                if(av_buffersrc_write_frame(audio_device.src_filter_ctx, audio_device.frame) < 0) {
                                    fprintf(stderr, "Error: failed to add audio frame to filter\n");
                                }
                            } else {
                                ret = avcodec_send_frame(audio_track.codec_context, audio_device.frame);
                                if(ret >= 0) {
                                    // TODO: Move to separate thread because this could write to network (for example when livestreaming)
                                    receive_frames(audio_track.codec_context, audio_track.stream_index, audio_track.stream, audio_device.frame->pts, av_format_context, record_start_time, frame_data_queue, replay_buffer_size_secs, frames_erased, write_output_mutex, paused_time_offset);
                                } else {
                                    fprintf(stderr, "Failed to encode audio!\n");
                                }
                            }

                            audio_device.frame->pts += audio_track.codec_context->frame_size;
                            num_received_frames++;
                        }
                    }

                    if(!audio_device.sound_device.handle)
                        av_usleep(timeout_ms * 1000);

                    if(got_audio_data) {
                        // TODO: Instead of converting audio, get float audio from alsa. Or does alsa do conversion internally to get this format?
                        if(needs_audio_conversion)
                            swr_convert(swr, &audio_device.frame->data[0], audio_track.codec_context->frame_size, (const uint8_t**)&sound_buffer, audio_track.codec_context->frame_size);
                        else
                            audio_device.frame->data[0] = (uint8_t*)sound_buffer;
                        first_frame = false;

                        if(audio_track.graph) {
                            std::lock_guard<std::mutex> lock(audio_filter_mutex);
                            // TODO: av_buffersrc_add_frame
                            if(av_buffersrc_write_frame(audio_device.src_filter_ctx, audio_device.frame) < 0) {
                                fprintf(stderr, "Error: failed to add audio frame to filter\n");
                            }
                        } else {
                            ret = avcodec_send_frame(audio_track.codec_context, audio_device.frame);
                            if(ret >= 0) {
                                // TODO: Move to separate thread because this could write to network (for example when livestreaming)
                                receive_frames(audio_track.codec_context, audio_track.stream_index, audio_track.stream, audio_device.frame->pts, av_format_context, record_start_time, frame_data_queue, replay_buffer_size_secs, frames_erased, write_output_mutex, paused_time_offset);
                            } else {
                                fprintf(stderr, "Failed to encode audio!\n");
                            }
                        }

                        audio_device.frame->pts += audio_track.codec_context->frame_size;
                        num_received_frames++;
                    }
                }

                if(swr)
                    swr_free(&swr);
            });
        }
    }

    std::thread amix_thread;
    if(uses_amix) {
        amix_thread = std::thread([&]() {
            AVFrame *aframe = av_frame_alloc();
            while(running) {
                {
                    std::lock_guard<std::mutex> lock(audio_filter_mutex);
                    for(AudioTrack &audio_track : audio_tracks) {
                        if(!audio_track.sink)
                            continue;

                        int err = 0;
                        while ((err = av_buffersink_get_frame(audio_track.sink, aframe)) >= 0) {
                            aframe->pts = audio_track.pts;
                            err = avcodec_send_frame(audio_track.codec_context, aframe);
                            if(err >= 0){
                                // TODO: Move to separate thread because this could write to network (for example when livestreaming)
                                receive_frames(audio_track.codec_context, audio_track.stream_index, audio_track.stream, aframe->pts, av_format_context, record_start_time, frame_data_queue, replay_buffer_size_secs, frames_erased, write_output_mutex, paused_time_offset);
                            } else {
                                fprintf(stderr, "Failed to encode audio!\n");
                            }
                            av_frame_unref(aframe);
                            audio_track.pts += audio_track.codec_context->frame_size;
                        }
                    }
                }
                av_usleep(5 * 1000); // 5 milliseconds
            }
            av_frame_free(&aframe);
        });
    }

    // Set update_fps to 24 to test if duplicate/delayed frames cause video/audio desync or too fast/slow video.
    //const double update_fps = fps + 190;
    bool should_stop_error = false;

    int64_t video_pts_counter = 0;
    int64_t video_prev_pts = 0;

    bool hdr_metadata_set = false;

    double damage_timeout_seconds = framerate_mode == FramerateMode::CONTENT ? 0.5 : 0.1;
    damage_timeout_seconds = std::max(damage_timeout_seconds, target_fps);

    bool use_damage_tracking = false;
    gsr_damage damage;
    memset(&damage, 0, sizeof(damage));
    if(gsr_window_get_display_server(window) == GSR_DISPLAY_SERVER_X11) {
        gsr_damage_init(&damage, &egl, record_cursor);
        use_damage_tracking = true;
    }

    if(is_monitor_capture)
        gsr_damage_set_target_monitor(&damage, window_str.c_str());

    double last_capture_seconds = record_start_time;
    bool wait_until_frame_time_elapsed = false;

    while(running) {
        const double frame_start = clock_get_monotonic_seconds();

        while(gsr_window_process_event(window)) {
            gsr_damage_on_event(&damage, gsr_window_get_event_data(window));
            gsr_capture_on_event(capture, &egl);
        }
        gsr_damage_tick(&damage);
        gsr_capture_tick(capture);

        if(!is_monitor_capture) {
            Window damage_target_window = 0;
            if(capture->get_window_id)
                damage_target_window = capture->get_window_id(capture);

            if(damage_target_window != 0)
                gsr_damage_set_target_window(&damage, damage_target_window);
        }

        should_stop_error = false;
        if(gsr_capture_should_stop(capture, &should_stop_error)) {
            running = 0;
            break;
        }

        bool damaged = false;
        if(use_damage_tracking)
            damaged = gsr_damage_is_damaged(&damage);
        else if(capture->is_damaged)
            damaged = capture->is_damaged(capture);
        else
            damaged = true;

        // TODO: Readd wayland sync warning when removing this
        if(framerate_mode != FramerateMode::CONTENT)
            damaged = true;

        if(damaged)
            ++damage_fps_counter;

        ++fps_counter;
        const double time_now = clock_get_monotonic_seconds();
        //const double frame_timer_elapsed = time_now - frame_timer_start;
        const double elapsed = time_now - fps_start_time;
        if (elapsed >= 1.0) {
            if(verbose) {
                fprintf(stderr, "update fps: %d, damage fps: %d\n", fps_counter, damage_fps_counter);
            }
            fps_start_time = time_now;
            fps_counter = 0;
            damage_fps_counter = 0;
        }

        const double this_video_frame_time = clock_get_monotonic_seconds() - paused_time_offset;
        const double time_since_last_frame_captured_seconds = this_video_frame_time - last_capture_seconds;
        double frame_time_overflow = time_since_last_frame_captured_seconds - target_fps;
        const bool frame_timeout = frame_time_overflow >= 0.0;

        bool force_frame_capture = wait_until_frame_time_elapsed && frame_timeout;
        bool allow_capture = !wait_until_frame_time_elapsed || force_frame_capture;
        if(framerate_mode == FramerateMode::CONTENT) {
            force_frame_capture = false;
            allow_capture = frame_timeout;
        }

        bool frame_captured = false;
        if((damaged || force_frame_capture) && allow_capture && !paused) {
            frame_captured = true;
            frame_time_overflow = std::min(std::max(0.0, frame_time_overflow), target_fps);
            last_capture_seconds = this_video_frame_time - frame_time_overflow;
            wait_until_frame_time_elapsed = false;

            gsr_damage_clear(&damage);
            if(capture->clear_damage)
                capture->clear_damage(capture);

            // TODO: Dont do this if no damage?
            egl.glClear(0);
            gsr_capture_capture(capture, video_frame, &color_conversion);
            gsr_egl_swap_buffers(&egl);
            gsr_video_encoder_copy_textures_to_frame(video_encoder, video_frame, &color_conversion);

            if(hdr && !hdr_metadata_set && replay_buffer_size_secs == -1 && add_hdr_metadata_to_video_stream(capture, video_stream))
                hdr_metadata_set = true;

            const int64_t expected_frames = std::round((this_video_frame_time - record_start_time) / target_fps);
            const int num_missed_frames = std::max((int64_t)1LL, expected_frames - video_pts_counter);

            // TODO: Check if duplicate frame can be saved just by writing it with a different pts instead of sending it again
            const int num_frames_to_encode = framerate_mode == FramerateMode::CONSTANT ? num_missed_frames : 1;
            for(int i = 0; i < num_frames_to_encode; ++i) {
                if(framerate_mode == FramerateMode::CONSTANT) {
                    video_frame->pts = video_pts_counter + i;
                } else {
                    video_frame->pts = (this_video_frame_time - record_start_time) * (double)AV_TIME_BASE;
                    const bool same_pts = video_frame->pts == video_prev_pts;
                    video_prev_pts = video_frame->pts;
                    if(same_pts)
                        continue;
                }

                int ret = avcodec_send_frame(video_codec_context, video_frame);
                if(ret == 0) {
                    // TODO: Move to separate thread because this could write to network (for example when livestreaming)
                    receive_frames(video_codec_context, VIDEO_STREAM_INDEX, video_stream, video_frame->pts, av_format_context,
                        record_start_time, frame_data_queue, replay_buffer_size_secs, frames_erased, write_output_mutex, paused_time_offset);
                } else {
                    fprintf(stderr, "Error: avcodec_send_frame failed, error: %s\n", av_error_to_string(ret));
                }
            }

            video_pts_counter += num_frames_to_encode;
        }

        if(toggle_pause == 1) {
            const bool new_paused_state = !paused;
            if(new_paused_state) {
                paused_time_start = clock_get_monotonic_seconds();
                fprintf(stderr, "Paused\n");
            } else {
                paused_time_offset += (clock_get_monotonic_seconds() - paused_time_start);
                fprintf(stderr, "Unpaused\n");
            }

            toggle_pause = 0;
            paused = !paused;
        }

        if(save_replay_thread.valid() && save_replay_thread.wait_for(std::chrono::seconds(0)) == std::future_status::ready) {
            save_replay_thread.get();
            puts(save_replay_output_filepath.c_str());
            fflush(stdout);
            if(recording_saved_script)
                run_recording_saved_script_async(recording_saved_script, save_replay_output_filepath.c_str(), "replay");
            std::lock_guard<std::mutex> lock(write_output_mutex);
            save_replay_packets.clear();
        }

        if(save_replay == 1 && !save_replay_thread.valid() && replay_buffer_size_secs != -1) {
            save_replay = 0;
            save_replay_async(video_codec_context, VIDEO_STREAM_INDEX, audio_tracks, frame_data_queue, frames_erased, filename, container_format, file_extension, write_output_mutex, date_folders, hdr, capture);
        }

        const double frame_end = clock_get_monotonic_seconds();
        const double time_at_frame_end = frame_end - paused_time_offset;
        const double time_elapsed_total = time_at_frame_end - record_start_time;
        const int64_t frames_elapsed = (int64_t)(time_elapsed_total / target_fps);
        const double time_at_next_frame = (frames_elapsed + 1) * target_fps;
        double time_to_next_frame = time_at_next_frame - time_elapsed_total;
        if(time_to_next_frame > target_fps*1.1)
            time_to_next_frame = target_fps;

        const double frame_time = frame_end - frame_start;
        const bool frame_deadline_missed = frame_time > target_fps;
        if(time_to_next_frame >= 0.0 && !frame_deadline_missed && frame_captured)
            av_usleep(time_to_next_frame * 1000.0 * 1000.0);
        else {
            if(paused)
                av_usleep(20.0 * 1000.0); // 20 milliseconds
            else if(frame_deadline_missed)
            {}
            else if(framerate_mode == FramerateMode::CONTENT || !frame_captured)
                av_usleep(2.8 * 1000.0); // 2.8 milliseconds
            else if(!frame_captured)
                av_usleep(1.0 * 1000.0); // 1 milliseconds
            wait_until_frame_time_elapsed = true;
        }
    }

    running = 0;

    if(save_replay_thread.valid()) {
        save_replay_thread.get();
        puts(save_replay_output_filepath.c_str());
        fflush(stdout);
        if(recording_saved_script)
            run_recording_saved_script_async(recording_saved_script, save_replay_output_filepath.c_str(), "replay");
        std::lock_guard<std::mutex> lock(write_output_mutex);
        save_replay_packets.clear();
    }

    for(AudioTrack &audio_track : audio_tracks) {
        for(auto &audio_device : audio_track.audio_devices) {
            audio_device.thread.join();
            sound_device_close(&audio_device.sound_device);
        }
    }

    if(amix_thread.joinable())
        amix_thread.join();

    if (replay_buffer_size_secs == -1 && av_write_trailer(av_format_context) != 0) {
        fprintf(stderr, "Failed to write trailer\n");
    }

    if(replay_buffer_size_secs == -1 && !(output_format->flags & AVFMT_NOFILE))
        avio_close(av_format_context->pb);

    gsr_damage_deinit(&damage);
    gsr_color_conversion_deinit(&color_conversion);
    gsr_video_encoder_destroy(video_encoder, video_codec_context);
    gsr_capture_destroy(capture, video_codec_context);
#ifdef GSR_APP_AUDIO
    gsr_pipewire_audio_deinit(&pipewire_audio);
#endif

    if(replay_buffer_size_secs == -1 && recording_saved_script)
        run_recording_saved_script_async(recording_saved_script, filename, "regular");

    if(dpy) {
        // TODO: This causes a crash, why? maybe some other library dlclose xlib and that also happened to unload this???
        //XCloseDisplay(dpy);
    }

    //gsr_egl_unload(&egl);
    //gsr_window_destroy(&window);

    //av_frame_free(&video_frame);
    free(empty_audio);
    // We do an _exit here because cuda uses at_exit to do _something_ that causes the program to freeze,
    // but only on some nvidia driver versions on some gpus (RTX?), and _exit exits the program without calling
    // the at_exit registered functions.
    // Cuda (cuvid library in this case) seems to be waiting for a thread that never finishes execution.
    // Maybe this happens because we dont clean up all ffmpeg resources?
    // TODO: Investigate this.
    _exit(should_stop_error ? 3 : 0);
}