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-rw-r--r--src/encoder/video/nvenc.c237
1 files changed, 237 insertions, 0 deletions
diff --git a/src/encoder/video/nvenc.c b/src/encoder/video/nvenc.c
new file mode 100644
index 0000000..718560d
--- /dev/null
+++ b/src/encoder/video/nvenc.c
@@ -0,0 +1,237 @@
+#include "../../../include/encoder/video/nvenc.h"
+#include "../../../include/egl.h"
+#include "../../../include/cuda.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 overclock = gsr_egl_get_display_server(self->params.egl) == GSR_DISPLAY_SERVER_X11 ? self->params.overclock : false;
+ if(!gsr_cuda_load(&self->cuda, self->params.egl->x11.dpy, 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;
+}