Add vulkan video encoding option (-k h264_vulkan). WIP, not fully hardware accelerated yet

src/encoder/video/vulkan.c

@@ -5,10 +5,28 @@
 #include <libavcodec/avcodec.h>
 #include <libavutil/hwcontext_vulkan.h>
 
+//#include <vulkan/vulkan_core.h>
+
+#define GL_TEXTURE_TILING_EXT             0x9580
+#define GL_OPTIMAL_TILING_EXT             0x9584
+#define GL_LINEAR_TILING_EXT              0x9585
+
+#define GL_PIXEL_PACK_BUFFER              0x88EB
+#define GL_PIXEL_UNPACK_BUFFER            0x88EC
+#define GL_STREAM_READ                    0x88E1
+#define GL_STREAM_DRAW                    0x88E0
+#define GL_READ_ONLY                      0x88B8
+#define GL_WRITE_ONLY                     0x88B9
+#define GL_READ_FRAMEBUFFER               0x8CA8
+
 typedef struct {
     gsr_video_encoder_vulkan_params params;
     unsigned int target_textures[2];
     AVBufferRef *device_ctx;
+    AVVulkanDeviceContext* vv;
+    unsigned int pbo_y[2];
+    unsigned int pbo_uv[2];
+    AVFrame *sw_frame;
 } gsr_video_encoder_vulkan;
 
 static bool gsr_video_encoder_vulkan_setup_context(gsr_video_encoder_vulkan *self, AVCodecContext *video_codec_context) {
@@ -32,6 +50,7 @@ static bool gsr_video_encoder_vulkan_setup_context(gsr_video_encoder_vulkan *sel
     hw_frame_context->format = video_codec_context->pix_fmt;
     hw_frame_context->device_ctx = (AVHWDeviceContext*)self->device_ctx->data;
 
+    //AVVulkanFramesContext *vk_frame_ctx = (AVVulkanFramesContext*)hw_frame_context->hwctx;
     //hw_frame_context->initial_pool_size = 20;
 
     if (av_hwframe_ctx_init(frame_context) < 0) {
@@ -47,12 +66,92 @@ static bool gsr_video_encoder_vulkan_setup_context(gsr_video_encoder_vulkan *sel
     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->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_TILING_EXT, GL_OPTIMAL_TILING_EXT);
+    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 AVVulkanDeviceContext* video_codec_context_get_vulkan_data(AVCodecContext *video_codec_context) {
+    AVBufferRef *hw_frames_ctx = video_codec_context->hw_frames_ctx;
+    if(!hw_frames_ctx)
+        return NULL;
+
+    AVHWFramesContext *hw_frame_context = (AVHWFramesContext*)hw_frames_ctx->data;
+    AVHWDeviceContext *device_context = (AVHWDeviceContext*)hw_frame_context->device_ctx;
+    if(device_context->type != AV_HWDEVICE_TYPE_VULKAN)
+        return NULL;
+
+    return (AVVulkanDeviceContext*)device_context->hwctx;
+}
+
 static bool gsr_video_encoder_vulkan_setup_textures(gsr_video_encoder_vulkan *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_vulkan_setup_textures: av_hwframe_get_buffer failed: %d\n", res);
         return false;
     }
+
+    //AVVkFrame *target_surface_id = (AVVkFrame*)frame->data[0];
+    self->vv = video_codec_context_get_vulkan_data(video_codec_context);
+
+    const unsigned int internal_formats_nv12[2] = { GL_RGBA8, GL_RGBA8 };
+    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_cuda_setup_textures: failed to create opengl texture\n");
+            return false;
+        }
+    }
+
+    self->params.egl->glGenBuffers(2, self->pbo_y);
+
+    self->params.egl->glBindBuffer(GL_PIXEL_PACK_BUFFER, self->pbo_y[0]);
+    self->params.egl->glBufferData(GL_PIXEL_PACK_BUFFER, 3840 * 2160, 0, GL_STREAM_READ);
+
+    self->params.egl->glBindBuffer(GL_PIXEL_PACK_BUFFER, self->pbo_y[1]);
+    self->params.egl->glBufferData(GL_PIXEL_PACK_BUFFER, 3840 * 2160, 0, GL_STREAM_READ);
+
+    self->params.egl->glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
+
+    self->params.egl->glGenBuffers(2, self->pbo_uv);
+
+    self->params.egl->glBindBuffer(GL_PIXEL_PACK_BUFFER, self->pbo_uv[0]);
+    self->params.egl->glBufferData(GL_PIXEL_PACK_BUFFER, 1920 * 1080 * 2, 0, GL_STREAM_READ);
+
+    self->params.egl->glBindBuffer(GL_PIXEL_PACK_BUFFER, self->pbo_uv[1]);
+    self->params.egl->glBufferData(GL_PIXEL_PACK_BUFFER, 1920 * 1080 * 2, 0, GL_STREAM_READ);
+
+    self->params.egl->glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
+
+    self->sw_frame = av_frame_alloc();
+    self->sw_frame->format = AV_PIX_FMT_NV12;
+    self->sw_frame->width = frame->width;
+    self->sw_frame->height = frame->height;
+
+    // TODO: Remove
+    if(av_frame_get_buffer(self->sw_frame, 0) < 0) {
+        fprintf(stderr, "failed to allocate sw frame\n");
+    }
+
+    // TODO: Remove
+    if(av_frame_make_writable(self->sw_frame) < 0) {
+        fprintf(stderr, "failed to make writable\n");
+    }
     return true;
 }
 
@@ -85,6 +184,91 @@ void gsr_video_encoder_vulkan_stop(gsr_video_encoder_vulkan *self, AVCodecContex
         av_buffer_unref(&self->device_ctx);
 }
 
+static void nop_free(void *opaque, uint8_t *data) {
+
+}
+
+static void gsr_video_encoder_vulkan_copy_textures_to_frame(gsr_video_encoder *encoder, AVFrame *frame, gsr_color_conversion *color_conversion) {
+    gsr_video_encoder_vulkan *self = encoder->priv;
+
+    static int counter = 0;
+    ++counter;
+
+    // AVBufferRef *av_buffer_create(uint8_t *data, size_t size,
+    //                           void (*free)(void *opaque, uint8_t *data),
+    //                           void *opaque, int flags);
+
+    while(self->params.egl->glGetError()){}
+    self->params.egl->glBindFramebuffer(GL_READ_FRAMEBUFFER, color_conversion->framebuffers[0]);
+    //fprintf(stderr, "1 gl err: %d\n", self->params.egl->glGetError());
+    self->params.egl->glBindBuffer(GL_PIXEL_PACK_BUFFER, self->pbo_y[counter % 2]);
+    self->params.egl->glBufferData(GL_PIXEL_PACK_BUFFER, 3840 * 2160, 0, GL_STREAM_READ);
+    self->params.egl->glReadPixels(0, 0, 3840, 2160, GL_RED, GL_UNSIGNED_BYTE, 0);
+    //fprintf(stderr, "2 gl err: %d\n", self->params.egl->glGetError());
+
+    const int next_pbo_y = (counter + 1) % 2;
+    self->params.egl->glBindBuffer(GL_PIXEL_PACK_BUFFER, self->pbo_y[next_pbo_y]);
+    self->params.egl->glBufferData(GL_PIXEL_PACK_BUFFER, 3840 * 2160, 0, GL_STREAM_READ);
+    //fprintf(stderr, "3 gl err: %d\n", self->params.egl->glGetError());
+    uint8_t *ptr_y = (uint8_t*)self->params.egl->glMapBuffer(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY);
+    //fprintf(stderr, "4 gl err: %d\n", self->params.egl->glGetError());
+    if(!ptr_y) {
+        fprintf(stderr, "failed to map buffer y!\n");
+    }
+
+    while(self->params.egl->glGetError()){}
+    self->params.egl->glBindFramebuffer(GL_READ_FRAMEBUFFER, color_conversion->framebuffers[1]);
+    //fprintf(stderr, "5 gl err: %d\n", self->params.egl->glGetError());
+    self->params.egl->glBindBuffer(GL_PIXEL_PACK_BUFFER, self->pbo_uv[counter % 2]);
+    self->params.egl->glBufferData(GL_PIXEL_PACK_BUFFER, 1920 * 1080 * 2, 0, GL_STREAM_READ);
+    //fprintf(stderr, "5.5 gl err: %d\n", self->params.egl->glGetError());
+    self->params.egl->glReadPixels(0, 0, 1920, 1080, GL_RG, GL_UNSIGNED_BYTE, 0);
+    //fprintf(stderr, "6 gl err: %d\n", self->params.egl->glGetError());
+
+    const int next_pbo_uv = (counter + 1) % 2;
+    self->params.egl->glBindBuffer(GL_PIXEL_PACK_BUFFER, self->pbo_uv[next_pbo_uv]);
+    self->params.egl->glBufferData(GL_PIXEL_PACK_BUFFER, 1920 * 1080 * 2, 0, GL_STREAM_READ);
+    //fprintf(stderr, "7 gl err: %d\n", self->params.egl->glGetError());
+    uint8_t *ptr_uv = (uint8_t*)self->params.egl->glMapBuffer(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY);
+    //fprintf(stderr, "8 gl err: %d\n", self->params.egl->glGetError());
+    if(!ptr_uv) {
+        fprintf(stderr, "failed to map buffer uv!\n");
+    }
+
+    //self->sw_frame->buf[0] = av_buffer_create(ptr_y, 3840 * 2160, nop_free, NULL, 0);
+    //self->sw_frame->buf[1] = av_buffer_create(ptr_uv, 1920 * 1080 * 2, nop_free, NULL, 0);
+    //self->sw_frame->data[0] = self->sw_frame->buf[0]->data;
+    //self->sw_frame->data[1] = self->sw_frame->buf[1]->data;
+    //self->sw_frame->extended_data[0] = self->sw_frame->data[0];
+    //self->sw_frame->extended_data[1] = self->sw_frame->data[1];
+
+    self->sw_frame->data[0] = ptr_y;
+    self->sw_frame->data[1] = ptr_uv;
+
+    self->params.egl->glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
+    self->params.egl->glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
+
+    //self->params.egl->glBindTexture(GL_TEXTURE_2D, self->target_textures[1]);
+    //self->params.egl->glGetTexImage(GL_TEXTURE_2D, 0, GL_RG, GL_UNSIGNED_BYTE, sw_frame->data[1]);
+
+    //self->params.egl->glBindTexture(GL_TEXTURE_2D, 0);
+
+    int ret = av_hwframe_transfer_data(frame, self->sw_frame, 0);
+    if(ret < 0) {
+        fprintf(stderr, "transfer data failed, error: %s\n", av_err2str(ret));
+    }
+
+    //av_buffer_unref(&self->sw_frame->buf[0]);
+    //av_buffer_unref(&self->sw_frame->buf[1]);
+
+    //av_frame_free(&sw_frame);
+    self->params.egl->glBindBuffer(GL_PIXEL_PACK_BUFFER, self->pbo_y[next_pbo_y]);
+    self->params.egl->glUnmapBuffer(GL_PIXEL_PACK_BUFFER);
+    self->params.egl->glBindBuffer(GL_PIXEL_PACK_BUFFER, self->pbo_y[next_pbo_uv]);
+    self->params.egl->glUnmapBuffer(GL_PIXEL_PACK_BUFFER);
+    self->params.egl->glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
+}
+
 static void gsr_video_encoder_vulkan_get_textures(gsr_video_encoder *encoder, unsigned int *textures, int *num_textures, gsr_destination_color *destination_color) {
     gsr_video_encoder_vulkan *self = encoder->priv;
     textures[0] = self->target_textures[0];
@@ -114,7 +298,7 @@ gsr_video_encoder* gsr_video_encoder_vulkan_create(const gsr_video_encoder_vulka
 
     *encoder = (gsr_video_encoder) {
         .start = gsr_video_encoder_vulkan_start,
-        .copy_textures_to_frame = NULL,
+        .copy_textures_to_frame = gsr_video_encoder_vulkan_copy_textures_to_frame,
         .get_textures = gsr_video_encoder_vulkan_get_textures,
         .destroy = gsr_video_encoder_vulkan_destroy,
         .priv = encoder_vulkan