Separate video encoding method from capture method

With this instead of kms_cuda/kms_vaapi/kms_software and
xcomposite_cuda/xcomposite_vaapi/xcomposite_software there
is now only kms and xcomposite.

1 files changed, 221 insertions, 0 deletions

diff --git a/src/encoder/video/vaapi.c b/src/encoder/video/vaapi.c
new file mode 100644
index 0000000..318ab1a
--- /dev/null
+++ b/src/encoder/video/vaapi.c
@@ -0,0 +1,221 @@
+#include "../../../include/encoder/video/vaapi.h"
+#include "../../../include/utils.h"
+#include "../../../include/egl.h"
+
+#include <libavcodec/avcodec.h>
+#include <libavutil/hwcontext_vaapi.h>
+
+#include <va/va_drmcommon.h>
+
+#include <stdlib.h>
+#include <unistd.h>
+
+typedef struct {
+    gsr_video_encoder_vaapi_params params;
+
+    unsigned int target_textures[2];
+
+    VADisplay va_dpy;
+    VADRMPRIMESurfaceDescriptor prime;
+} gsr_video_encoder_vaapi;
+
+static bool gsr_video_encoder_vaapi_setup_context(gsr_video_encoder_vaapi *self, AVCodecContext *video_codec_context) {
+    char render_path[128];
+    if(!gsr_card_path_get_render_path(self->params.egl->card_path, render_path)) {
+        fprintf(stderr, "gsr error: gsr_video_encoder_vaapi_setup_context: failed to get /dev/dri/renderDXXX file from %s\n", self->params.egl->card_path);
+        return false;
+    }
+
+    AVBufferRef *device_ctx;
+    if(av_hwdevice_ctx_create(&device_ctx, AV_HWDEVICE_TYPE_VAAPI, render_path, NULL, 0) < 0) {
+        fprintf(stderr, "gsr error: gsr_video_encoder_vaapi_setup_context: failed to create hardware device context\n");
+        return false;
+    }
+
+    AVBufferRef *frame_context = av_hwframe_ctx_alloc(device_ctx);
+    if(!frame_context) {
+        fprintf(stderr, "gsr error: gsr_video_encoder_vaapi_setup_context: failed to create hwframe context\n");
+        av_buffer_unref(&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.hdr ? AV_PIX_FMT_P010LE : AV_PIX_FMT_NV12;
+    hw_frame_context->format = video_codec_context->pix_fmt;
+    hw_frame_context->device_ref = device_ctx;
+    hw_frame_context->device_ctx = (AVHWDeviceContext*)device_ctx->data;
+
+    //hw_frame_context->initial_pool_size = 20;
+
+    AVVAAPIDeviceContext *vactx =((AVHWDeviceContext*)device_ctx->data)->hwctx;
+    self->va_dpy = vactx->display;
+
+    if (av_hwframe_ctx_init(frame_context) < 0) {
+        fprintf(stderr, "gsr error: gsr_video_encoder_vaapi_setup_context: failed to initialize hardware frame context "
+                        "(note: ffmpeg version needs to be > 4.0)\n");
+        av_buffer_unref(&device_ctx);
+        //av_buffer_unref(&frame_context);
+        return false;
+    }
+
+    video_codec_context->hw_device_ctx = av_buffer_ref(device_ctx);
+    video_codec_context->hw_frames_ctx = av_buffer_ref(frame_context);
+    return true;
+}
+
+static uint32_t fourcc(uint32_t a, uint32_t b, uint32_t c, uint32_t d) {
+    return (d << 24) | (c << 16) | (b << 8) | a;
+}
+
+static bool gsr_video_encoder_vaapi_setup_textures(gsr_video_encoder_vaapi *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_vaapi_setup_textures: av_hwframe_get_buffer failed: %d\n", res);
+        return false;
+    }
+
+    VASurfaceID target_surface_id = (uintptr_t)frame->data[3];
+
+    VAStatus va_status = vaExportSurfaceHandle(self->va_dpy, target_surface_id, VA_SURFACE_ATTRIB_MEM_TYPE_DRM_PRIME_2, VA_EXPORT_SURFACE_WRITE_ONLY | VA_EXPORT_SURFACE_SEPARATE_LAYERS, &self->prime);
+    if(va_status != VA_STATUS_SUCCESS) {
+        fprintf(stderr, "gsr error: gsr_video_encoder_vaapi_setup_textures: vaExportSurfaceHandle failed, error: %d\n", va_status);
+        return false;
+    }
+    vaSyncSurface(self->va_dpy, target_surface_id);
+
+    const uint32_t formats_nv12[2] = { fourcc('R', '8', ' ', ' '), fourcc('G', 'R', '8', '8') };
+    const uint32_t formats_p010[2] = { fourcc('R', '1', '6', ' '), fourcc('G', 'R', '3', '2') };
+
+    if(self->prime.fourcc == VA_FOURCC_NV12 || self->prime.fourcc == VA_FOURCC_P010) {
+        const uint32_t *formats = self->prime.fourcc == VA_FOURCC_NV12 ? formats_nv12 : formats_p010;
+        const int div[2] = {1, 2}; // divide UV texture size by 2 because chroma is half size
+
+        self->params.egl->glGenTextures(2, self->target_textures);
+        for(int i = 0; i < 2; ++i) {
+            const int layer = i;
+            const int plane = 0;
+
+            const uint64_t modifier = self->prime.objects[self->prime.layers[layer].object_index[plane]].drm_format_modifier;
+            const intptr_t img_attr[] = {
+                EGL_LINUX_DRM_FOURCC_EXT,       formats[i],
+                EGL_WIDTH,                      self->prime.width / div[i],
+                EGL_HEIGHT,                     self->prime.height / div[i],
+                EGL_DMA_BUF_PLANE0_FD_EXT,      self->prime.objects[self->prime.layers[layer].object_index[plane]].fd,
+                EGL_DMA_BUF_PLANE0_OFFSET_EXT,  self->prime.layers[layer].offset[plane],
+                EGL_DMA_BUF_PLANE0_PITCH_EXT,   self->prime.layers[layer].pitch[plane],
+                EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT, modifier & 0xFFFFFFFFULL,
+                EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT, modifier >> 32ULL,
+                EGL_NONE
+            };
+
+            while(self->params.egl->eglGetError() != EGL_SUCCESS){}
+            EGLImage image = self->params.egl->eglCreateImage(self->params.egl->egl_display, 0, EGL_LINUX_DMA_BUF_EXT, NULL, img_attr);
+            if(!image) {
+                fprintf(stderr, "gsr error: gsr_video_encoder_vaapi_setup_textures: failed to create egl image from drm fd for output drm fd, error: %d\n", self->params.egl->eglGetError());
+                return false;
+            }
+
+            self->params.egl->glBindTexture(GL_TEXTURE_2D, self->target_textures[i]);
+            self->params.egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+            self->params.egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+            self->params.egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+            self->params.egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+            while(self->params.egl->glGetError()) {}
+            while(self->params.egl->eglGetError() != EGL_SUCCESS){}
+            self->params.egl->glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, image);
+            if(self->params.egl->glGetError() != 0 || self->params.egl->eglGetError() != EGL_SUCCESS) {
+                // TODO: Get the error properly
+                fprintf(stderr, "gsr error: gsr_video_encoder_vaapi_setup_textures: failed to bind egl image to gl texture, error: %d\n", self->params.egl->eglGetError());
+                self->params.egl->eglDestroyImage(self->params.egl->egl_display, image);
+                self->params.egl->glBindTexture(GL_TEXTURE_2D, 0);
+                return false;
+            }
+
+            self->params.egl->eglDestroyImage(self->params.egl->egl_display, image);
+            self->params.egl->glBindTexture(GL_TEXTURE_2D, 0);
+        }
+
+        return true;
+    } else {
+        fprintf(stderr, "gsr error: gsr_video_encoder_vaapi_setup_textures: unexpected fourcc %u for output drm fd, expected nv12 or p010\n", self->prime.fourcc);
+        return false;
+    }
+}
+
+static void gsr_video_encoder_vaapi_stop(gsr_video_encoder_vaapi *self, AVCodecContext *video_codec_context);
+
+static bool gsr_video_encoder_vaapi_start(gsr_video_encoder *encoder, AVCodecContext *video_codec_context, AVFrame *frame) {
+    gsr_video_encoder_vaapi *encoder_vaapi = encoder->priv;
+
+    if(!gsr_video_encoder_vaapi_setup_context(encoder_vaapi, video_codec_context)) {
+        gsr_video_encoder_vaapi_stop(encoder_vaapi, video_codec_context);
+        return false;
+    }
+
+    if(!gsr_video_encoder_vaapi_setup_textures(encoder_vaapi, video_codec_context, frame)) {
+        gsr_video_encoder_vaapi_stop(encoder_vaapi, video_codec_context);
+        return false;
+    }
+
+    return true;
+}
+
+void gsr_video_encoder_vaapi_stop(gsr_video_encoder_vaapi *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_device_ctx)
+        av_buffer_unref(&video_codec_context->hw_device_ctx);
+    if(video_codec_context->hw_frames_ctx)
+        av_buffer_unref(&video_codec_context->hw_frames_ctx);
+
+    for(uint32_t i = 0; i < self->prime.num_objects; ++i) {
+        if(self->prime.objects[i].fd > 0) {
+            close(self->prime.objects[i].fd);
+            self->prime.objects[i].fd = 0;
+        }
+    }
+}
+
+static void gsr_video_encoder_vaapi_get_textures(gsr_video_encoder *encoder, unsigned int *textures, int *num_textures, gsr_destination_color *destination_color) {
+    gsr_video_encoder_vaapi *encoder_vaapi = encoder->priv;
+    textures[0] = encoder_vaapi->target_textures[0];
+    textures[1] = encoder_vaapi->target_textures[1];
+    *num_textures = 2;
+    *destination_color = encoder_vaapi->params.hdr ? GSR_DESTINATION_COLOR_P010 : GSR_DESTINATION_COLOR_NV12;
+}
+
+static void gsr_video_encoder_vaapi_destroy(gsr_video_encoder *encoder, AVCodecContext *video_codec_context) {
+    gsr_video_encoder_vaapi_stop(encoder->priv, video_codec_context);
+    free(encoder->priv);
+    free(encoder);
+}
+
+gsr_video_encoder* gsr_video_encoder_vaapi_create(const gsr_video_encoder_vaapi_params *params) {
+    gsr_video_encoder *encoder = calloc(1, sizeof(gsr_video_encoder));
+    if(!encoder)
+        return NULL;
+
+    gsr_video_encoder_vaapi *encoder_vaapi = calloc(1, sizeof(gsr_video_encoder_vaapi));
+    if(!encoder_vaapi) {
+        free(encoder);
+        return NULL;
+    }
+
+    encoder_vaapi->params = *params;
+
+    *encoder = (gsr_video_encoder) {
+        .start = gsr_video_encoder_vaapi_start,
+        .copy_textures_to_frame = NULL,
+        .get_textures = gsr_video_encoder_vaapi_get_textures,
+        .destroy = gsr_video_encoder_vaapi_destroy,
+        .priv = encoder_vaapi
+    };
+
+    return encoder;
+}