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#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;
}
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