#include "../../../include/encoder/video/nvenc.h" #include "../../../include/egl.h" #include "../../../include/cuda.h" #include "../../../include/window/window.h" #include <libavcodec/avcodec.h> #include <libavutil/hwcontext_cuda.h> #include <stdlib.h> typedef struct { gsr_video_encoder_nvenc_params params; unsigned int target_textures[2]; AVBufferRef *device_ctx; gsr_cuda cuda; CUgraphicsResource cuda_graphics_resources[2]; CUarray mapped_arrays[2]; CUstream cuda_stream; } gsr_video_encoder_nvenc; static bool gsr_video_encoder_nvenc_setup_context(gsr_video_encoder_nvenc *self, AVCodecContext *video_codec_context) { self->device_ctx = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_CUDA); if(!self->device_ctx) { fprintf(stderr, "gsr error: gsr_video_encoder_nvenc_setup_context failed: failed to create hardware device context\n"); return false; } AVHWDeviceContext *hw_device_context = (AVHWDeviceContext*)self->device_ctx->data; AVCUDADeviceContext *cuda_device_context = (AVCUDADeviceContext*)hw_device_context->hwctx; cuda_device_context->cuda_ctx = self->cuda.cu_ctx; if(av_hwdevice_ctx_init(self->device_ctx) < 0) { fprintf(stderr, "gsr error: gsr_video_encoder_nvenc_setup_context failed: failed to create hardware device context\n"); av_buffer_unref(&self->device_ctx); return false; } AVBufferRef *frame_context = av_hwframe_ctx_alloc(self->device_ctx); if(!frame_context) { fprintf(stderr, "gsr error: gsr_video_encoder_nvenc_setup_context failed: failed to create hwframe context\n"); av_buffer_unref(&self->device_ctx); return false; } AVHWFramesContext *hw_frame_context = (AVHWFramesContext*)frame_context->data; hw_frame_context->width = video_codec_context->width; hw_frame_context->height = video_codec_context->height; hw_frame_context->sw_format = self->params.color_depth == GSR_COLOR_DEPTH_10_BITS ? AV_PIX_FMT_P010LE : AV_PIX_FMT_NV12; hw_frame_context->format = video_codec_context->pix_fmt; hw_frame_context->device_ctx = (AVHWDeviceContext*)self->device_ctx->data; if (av_hwframe_ctx_init(frame_context) < 0) { fprintf(stderr, "gsr error: gsr_video_encoder_nvenc_setup_context failed: failed to initialize hardware frame context " "(note: ffmpeg version needs to be > 4.0)\n"); av_buffer_unref(&self->device_ctx); //av_buffer_unref(&frame_context); return false; } self->cuda_stream = cuda_device_context->stream; video_codec_context->hw_frames_ctx = av_buffer_ref(frame_context); av_buffer_unref(&frame_context); return true; } static unsigned int gl_create_texture(gsr_egl *egl, int width, int height, int internal_format, unsigned int format) { unsigned int texture_id = 0; egl->glGenTextures(1, &texture_id); egl->glBindTexture(GL_TEXTURE_2D, texture_id); egl->glTexImage2D(GL_TEXTURE_2D, 0, internal_format, width, height, 0, format, GL_UNSIGNED_BYTE, NULL); egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); egl->glBindTexture(GL_TEXTURE_2D, 0); return texture_id; } static bool cuda_register_opengl_texture(gsr_cuda *cuda, CUgraphicsResource *cuda_graphics_resource, CUarray *mapped_array, unsigned int texture_id) { CUresult res; res = cuda->cuGraphicsGLRegisterImage(cuda_graphics_resource, texture_id, GL_TEXTURE_2D, CU_GRAPHICS_REGISTER_FLAGS_NONE); if (res != CUDA_SUCCESS) { const char *err_str = "unknown"; cuda->cuGetErrorString(res, &err_str); fprintf(stderr, "gsr error: cuda_register_opengl_texture: cuGraphicsGLRegisterImage failed, error: %s, texture " "id: %u\n", err_str, texture_id); return false; } res = cuda->cuGraphicsResourceSetMapFlags(*cuda_graphics_resource, CU_GRAPHICS_MAP_RESOURCE_FLAGS_NONE); res = cuda->cuGraphicsMapResources(1, cuda_graphics_resource, 0); res = cuda->cuGraphicsSubResourceGetMappedArray(mapped_array, *cuda_graphics_resource, 0, 0); return true; } static bool gsr_video_encoder_nvenc_setup_textures(gsr_video_encoder_nvenc *self, AVCodecContext *video_codec_context, AVFrame *frame) { const int res = av_hwframe_get_buffer(video_codec_context->hw_frames_ctx, frame, 0); if(res < 0) { fprintf(stderr, "gsr error: gsr_video_encoder_nvenc_setup_textures: av_hwframe_get_buffer failed: %d\n", res); return false; } const unsigned int internal_formats_nv12[2] = { GL_R8, GL_RG8 }; const unsigned int internal_formats_p010[2] = { GL_R16, GL_RG16 }; const unsigned int formats[2] = { GL_RED, GL_RG }; const int div[2] = {1, 2}; // divide UV texture size by 2 because chroma is half size for(int i = 0; i < 2; ++i) { self->target_textures[i] = gl_create_texture(self->params.egl, video_codec_context->width / div[i], video_codec_context->height / div[i], self->params.color_depth == GSR_COLOR_DEPTH_8_BITS ? internal_formats_nv12[i] : internal_formats_p010[i], formats[i]); if(self->target_textures[i] == 0) { fprintf(stderr, "gsr error: gsr_video_encoder_nvenc_setup_textures: failed to create opengl texture\n"); return false; } if(!cuda_register_opengl_texture(&self->cuda, &self->cuda_graphics_resources[i], &self->mapped_arrays[i], self->target_textures[i])) { return false; } } return true; } static void gsr_video_encoder_nvenc_stop(gsr_video_encoder_nvenc *self, AVCodecContext *video_codec_context); static bool gsr_video_encoder_nvenc_start(gsr_video_encoder *encoder, AVCodecContext *video_codec_context, AVFrame *frame) { gsr_video_encoder_nvenc *self = encoder->priv; const bool is_x11 = gsr_window_get_display_server(self->params.egl->window) == GSR_DISPLAY_SERVER_X11; const bool overclock = is_x11 ? self->params.overclock : false; Display *display = is_x11 ? gsr_window_get_display(self->params.egl->window) : NULL; if(!gsr_cuda_load(&self->cuda, display, overclock)) { fprintf(stderr, "gsr error: gsr_video_encoder_nvenc_start: failed to load cuda\n"); gsr_video_encoder_nvenc_stop(self, video_codec_context); return false; } if(!gsr_video_encoder_nvenc_setup_context(self, video_codec_context)) { gsr_video_encoder_nvenc_stop(self, video_codec_context); return false; } if(!gsr_video_encoder_nvenc_setup_textures(self, video_codec_context, frame)) { gsr_video_encoder_nvenc_stop(self, video_codec_context); return false; } return true; } void gsr_video_encoder_nvenc_stop(gsr_video_encoder_nvenc *self, AVCodecContext *video_codec_context) { self->params.egl->glDeleteTextures(2, self->target_textures); self->target_textures[0] = 0; self->target_textures[1] = 0; if(video_codec_context->hw_frames_ctx) av_buffer_unref(&video_codec_context->hw_frames_ctx); if(self->device_ctx) av_buffer_unref(&self->device_ctx); if(self->cuda.cu_ctx) { for(int i = 0; i < 2; ++i) { if(self->cuda_graphics_resources[i]) { self->cuda.cuGraphicsUnmapResources(1, &self->cuda_graphics_resources[i], 0); self->cuda.cuGraphicsUnregisterResource(self->cuda_graphics_resources[i]); self->cuda_graphics_resources[i] = 0; } } } gsr_cuda_unload(&self->cuda); } static void gsr_video_encoder_nvenc_copy_textures_to_frame(gsr_video_encoder *encoder, AVFrame *frame, gsr_color_conversion *color_conversion) { gsr_video_encoder_nvenc *self = encoder->priv; const int div[2] = {1, 2}; // divide UV texture size by 2 because chroma is half size for(int i = 0; i < 2; ++i) { CUDA_MEMCPY2D memcpy_struct; memcpy_struct.srcXInBytes = 0; memcpy_struct.srcY = 0; memcpy_struct.srcMemoryType = CU_MEMORYTYPE_ARRAY; memcpy_struct.dstXInBytes = 0; memcpy_struct.dstY = 0; memcpy_struct.dstMemoryType = CU_MEMORYTYPE_DEVICE; memcpy_struct.srcArray = self->mapped_arrays[i]; memcpy_struct.srcPitch = frame->width / div[i]; memcpy_struct.dstDevice = (CUdeviceptr)frame->data[i]; memcpy_struct.dstPitch = frame->linesize[i]; memcpy_struct.WidthInBytes = frame->width * (self->params.color_depth == GSR_COLOR_DEPTH_10_BITS ? 2 : 1); memcpy_struct.Height = frame->height / div[i]; // TODO: Remove this copy if possible self->cuda.cuMemcpy2DAsync_v2(&memcpy_struct, self->cuda_stream); } // TODO: needed? self->cuda.cuStreamSynchronize(self->cuda_stream); } static void gsr_video_encoder_nvenc_get_textures(gsr_video_encoder *encoder, unsigned int *textures, int *num_textures, gsr_destination_color *destination_color) { gsr_video_encoder_nvenc *self = encoder->priv; textures[0] = self->target_textures[0]; textures[1] = self->target_textures[1]; *num_textures = 2; *destination_color = self->params.color_depth == GSR_COLOR_DEPTH_10_BITS ? GSR_DESTINATION_COLOR_P010 : GSR_DESTINATION_COLOR_NV12; } static void gsr_video_encoder_nvenc_destroy(gsr_video_encoder *encoder, AVCodecContext *video_codec_context) { gsr_video_encoder_nvenc_stop(encoder->priv, video_codec_context); free(encoder->priv); free(encoder); } gsr_video_encoder* gsr_video_encoder_nvenc_create(const gsr_video_encoder_nvenc_params *params) { gsr_video_encoder *encoder = calloc(1, sizeof(gsr_video_encoder)); if(!encoder) return NULL; gsr_video_encoder_nvenc *encoder_cuda = calloc(1, sizeof(gsr_video_encoder_nvenc)); if(!encoder_cuda) { free(encoder); return NULL; } encoder_cuda->params = *params; *encoder = (gsr_video_encoder) { .start = gsr_video_encoder_nvenc_start, .copy_textures_to_frame = gsr_video_encoder_nvenc_copy_textures_to_frame, .get_textures = gsr_video_encoder_nvenc_get_textures, .destroy = gsr_video_encoder_nvenc_destroy, .priv = encoder_cuda }; return encoder; }