diff options
Diffstat (limited to 'src/capture/kms_cuda.c')
| -rw-r--r-- | src/capture/kms_cuda.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/src/capture/kms_cuda.c b/src/capture/kms_cuda.c new file mode 100644 index 0000000..a9f1f8e --- /dev/null +++ b/src/capture/kms_cuda.c @@ -0,0 +1,181 @@ +#include "../../include/capture/kms_cuda.h" +#include "../../include/capture/kms.h" +#include "../../include/cuda.h" +#include <stdlib.h> +#include <stdio.h> +#include <unistd.h> +#include <assert.h> +#include <libavutil/hwcontext.h> +#include <libavutil/hwcontext_cuda.h> +#include <libavcodec/avcodec.h> + +typedef struct { + gsr_capture_kms kms; + + gsr_capture_kms_cuda_params params; + + gsr_cuda cuda; + CUgraphicsResource cuda_graphics_resources[2]; + CUarray mapped_arrays[2]; + CUstream cuda_stream; +} gsr_capture_kms_cuda; + +static void gsr_capture_kms_cuda_stop(gsr_capture *cap, AVCodecContext *video_codec_context); + +static int gsr_capture_kms_cuda_start(gsr_capture *cap, AVCodecContext *video_codec_context, AVFrame *frame) { + gsr_capture_kms_cuda *cap_kms = cap->priv; + + const int res = gsr_capture_kms_start(&cap_kms->kms, cap_kms->params.display_to_capture, cap_kms->params.egl, video_codec_context, frame); + if(res != 0) { + gsr_capture_kms_cuda_stop(cap, video_codec_context); + return res; + } + + // TODO: overclocking is not supported on wayland... + if(!gsr_cuda_load(&cap_kms->cuda, NULL, false)) { + fprintf(stderr, "gsr error: gsr_capture_kms_cuda_start: failed to load cuda\n"); + gsr_capture_kms_cuda_stop(cap, video_codec_context); + return -1; + } + + if(!cuda_create_codec_context(cap_kms->cuda.cu_ctx, video_codec_context, video_codec_context->width, video_codec_context->height, cap_kms->params.hdr, &cap_kms->cuda_stream)) { + gsr_capture_kms_cuda_stop(cap, video_codec_context); + return -1; + } + + gsr_cuda_context cuda_context = { + .cuda = &cap_kms->cuda, + .cuda_graphics_resources = cap_kms->cuda_graphics_resources, + .mapped_arrays = cap_kms->mapped_arrays + }; + + if(!gsr_capture_base_setup_cuda_textures(&cap_kms->kms.base, frame, &cuda_context, cap_kms->params.color_range, GSR_SOURCE_COLOR_RGB, cap_kms->params.hdr)) { + gsr_capture_kms_cuda_stop(cap, video_codec_context); + return -1; + } + + return 0; +} + +static bool gsr_capture_kms_cuda_should_stop(gsr_capture *cap, bool *err) { + gsr_capture_kms_cuda *cap_kms = cap->priv; + if(cap_kms->kms.should_stop) { + if(err) + *err = cap_kms->kms.stop_is_error; + return true; + } + + if(err) + *err = false; + return false; +} + +static void gsr_capture_kms_unload_cuda_graphics(gsr_capture_kms_cuda *cap_kms) { + if(cap_kms->cuda.cu_ctx) { + for(int i = 0; i < 2; ++i) { + if(cap_kms->cuda_graphics_resources[i]) { + cap_kms->cuda.cuGraphicsUnmapResources(1, &cap_kms->cuda_graphics_resources[i], 0); + cap_kms->cuda.cuGraphicsUnregisterResource(cap_kms->cuda_graphics_resources[i]); + cap_kms->cuda_graphics_resources[i] = 0; + } + } + } +} + +static int gsr_capture_kms_cuda_capture(gsr_capture *cap, AVFrame *frame) { + gsr_capture_kms_cuda *cap_kms = cap->priv; + + gsr_capture_kms_capture(&cap_kms->kms, frame, cap_kms->params.hdr, true, true, cap_kms->params.record_cursor); + + 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 = cap_kms->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 * (cap_kms->params.hdr ? 2 : 1); + memcpy_struct.Height = frame->height / div[i]; + // TODO: Remove this copy if possible + cap_kms->cuda.cuMemcpy2DAsync_v2(&memcpy_struct, cap_kms->cuda_stream); + } + + // TODO: needed? + cap_kms->cuda.cuStreamSynchronize(cap_kms->cuda_stream); + + return 0; +} + +static void gsr_capture_kms_cuda_capture_end(gsr_capture *cap, AVFrame *frame) { + (void)frame; + gsr_capture_kms_cuda *cap_kms = cap->priv; + gsr_capture_kms_cleanup_kms_fds(&cap_kms->kms); +} + +static void gsr_capture_kms_cuda_stop(gsr_capture *cap, AVCodecContext *video_codec_context) { + (void)video_codec_context; + gsr_capture_kms_cuda *cap_kms = cap->priv; + gsr_capture_kms_unload_cuda_graphics(cap_kms); + gsr_cuda_unload(&cap_kms->cuda); + gsr_capture_kms_stop(&cap_kms->kms); +} + +static void gsr_capture_kms_cuda_destroy(gsr_capture *cap, AVCodecContext *video_codec_context) { + (void)video_codec_context; + gsr_capture_kms_cuda *cap_kms = cap->priv; + if(cap->priv) { + gsr_capture_kms_cuda_stop(cap, video_codec_context); + free((void*)cap_kms->params.display_to_capture); + cap_kms->params.display_to_capture = NULL; + free(cap->priv); + cap->priv = NULL; + } + free(cap); +} + +gsr_capture* gsr_capture_kms_cuda_create(const gsr_capture_kms_cuda_params *params) { + if(!params) { + fprintf(stderr, "gsr error: gsr_capture_kms_cuda_create params is NULL\n"); + return NULL; + } + + gsr_capture *cap = calloc(1, sizeof(gsr_capture)); + if(!cap) + return NULL; + + gsr_capture_kms_cuda *cap_kms = calloc(1, sizeof(gsr_capture_kms_cuda)); + if(!cap_kms) { + free(cap); + return NULL; + } + + const char *display_to_capture = strdup(params->display_to_capture); + if(!display_to_capture) { + free(cap); + free(cap_kms); + return NULL; + } + + cap_kms->params = *params; + cap_kms->params.display_to_capture = display_to_capture; + + *cap = (gsr_capture) { + .start = gsr_capture_kms_cuda_start, + .tick = NULL, + .should_stop = gsr_capture_kms_cuda_should_stop, + .capture = gsr_capture_kms_cuda_capture, + .capture_end = gsr_capture_kms_cuda_capture_end, + .destroy = gsr_capture_kms_cuda_destroy, + .priv = cap_kms + }; + + return cap; +} |