PapaTutuWawa/gpu-screen-recorder
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Improve quality of lower resolution video, make video smoother

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This commit is contained in:
dec05eba 2020-06-14 04:27:08 +02:00
parent e533b19d6c
commit 0ec013395f
3 changed files with 63 additions and 48 deletions
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1
README.md
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@ -34,3 +34,4 @@ FFMPEG only uses the GPU with CUDA when doing transcoding from an input video to
* Support AMD and Intel, using VAAPI. cuda and vaapi should be loaded at runtime using dlopen instead of linking to those
libraries at compile-time.
* Clean up the code!
* Fix segfault in debug mode

108
src/main.cpp
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@ -151,9 +151,11 @@ static bool recreate_window_pixmap(Display *dpy, Window window_id,
cleanup_window_pixmap(dpy, pixmap);
const int pixmap_config[] = {
GLX_BIND_TO_TEXTURE_RGBA_EXT, True, GLX_DRAWABLE_TYPE, GLX_PIXMAP_BIT,
GLX_BIND_TO_TEXTURE_RGBA_EXT, True,
GLX_DRAWABLE_TYPE, GLX_PIXMAP_BIT | GLX_WINDOW_BIT,
GLX_BIND_TO_TEXTURE_TARGETS_EXT, GLX_TEXTURE_2D_BIT_EXT,
GLX_BIND_TO_MIPMAP_TEXTURE_EXT, True, GLX_DOUBLEBUFFER, False,
GLX_BIND_TO_MIPMAP_TEXTURE_EXT, True,
GLX_DOUBLEBUFFER, False,
GLX_BUFFER_SIZE, 32,
GLX_ALPHA_SIZE, 8,
// GLX_Y_INVERTED_EXT, (int)GLX_DONT_CARE,
@ -203,7 +205,6 @@ static bool recreate_window_pixmap(Display *dpy, Window window_id,
// glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glXBindTexImageEXT(dpy, pixmap.glx_pixmap, GLX_FRONT_EXT, NULL);
glGenerateMipmap(GL_TEXTURE_2D);
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH,
&pixmap.texture_width);
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT,
@ -226,7 +227,6 @@ static bool recreate_window_pixmap(Display *dpy, Window window_id,
glBindTexture(GL_TEXTURE_2D, pixmap.target_texture_id);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, pixmap.texture_width,
pixmap.texture_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glGenerateMipmap(GL_TEXTURE_2D);
int err2 = glGetError();
fprintf(stderr, "error: %d\n", err2);
glCopyImageSubData(pixmap.texture_id, GL_TEXTURE_2D, 0, 0, 0, 0,
@ -376,7 +376,7 @@ static AVStream *add_video_stream(AVFormatContext *av_format_context, AVCodec **
fprintf(stderr, "codec id: %d\n", (*codec)->id);
codec_context->width = window_pixmap.texture_width & ~1;
codec_context->height = window_pixmap.texture_height & ~1;
codec_context->bit_rate = codec_context->width * codec_context->height; //5000000;
codec_context->bit_rate = 5000000 + (codec_context->width * codec_context->height) / 2; //5000000 * ((double)fps / 30.0) + (codec_context->width * codec_context->height) / 2;
// Timebase: This is the fundamental unit of time (in seconds) in terms
// of which frame timestamps are represented. For fixed-fps content,
// timebase should be 1/framerate and timestamp increments should be
@ -389,6 +389,7 @@ static AVStream *add_video_stream(AVFormatContext *av_format_context, AVCodec **
codec_context->sample_aspect_ratio.den = 1;
codec_context->gop_size =
32; // Emit one intra frame every 32 frames at most
codec_context->max_b_frames = 2;
codec_context->pix_fmt = AV_PIX_FMT_CUDA;
if (codec_context->codec_id == AV_CODEC_ID_MPEG1VIDEO)
codec_context->mb_decision = 2;
@ -569,7 +570,7 @@ int main(int argc, char **argv) {
const char *filename = "/dev/stdout";
const double target_fps = 1.0f / (double)fps;
const double target_fps = 1.0 / (double)fps;
Display *dpy = XOpenDisplay(nullptr);
if (!dpy) {
@ -743,7 +744,7 @@ int main(int argc, char **argv) {
// res = cuGraphicsUnmapResources(1, &cuda_graphics_resource, 0);
double start_time = glfwGetTime();
double frame_timer_start = start_time;
double frame_timer_start = start_time - target_fps - 0.001;
double window_resize_timer = start_time;
bool window_resized = false;
int fps_counter = 0;
@ -784,7 +785,7 @@ int main(int argc, char **argv) {
std::mutex write_output_mutex;
bool running = true;
std::thread audio_thread([&running](AVFormatContext *av_format_context, AVStream *audio_stream, AVPacket *audio_packet, uint8_t *audio_frame_buf, SoundDevice *sound_device, AVFrame *audio_frame, std::mutex *write_output_mutex) {
std::thread audio_thread([&running](AVFormatContext *av_format_context, AVStream *audio_stream, AVPacket *audio_packet, uint8_t *audio_frame_buf, SoundDevice *sound_device, AVFrame *audio_frame, std::mutex *write_output_mutex) mutable {
SwrContext *swr = swr_alloc();
if(!swr) {
fprintf(stderr, "Failed to create SwrContext\n");
@ -831,8 +832,11 @@ int main(int argc, char **argv) {
swr_free(&swr);
}, av_format_context, audio_stream, &audio_packet, audio_frame_buf, &sound_device, audio_frame, &write_output_mutex);
bool redraw = true;
XEvent e;
while (!glfwWindowShouldClose(window)) {
double frame_start = glfwGetTime();
glClear(GL_COLOR_BUFFER_BIT);
glfwSwapBuffers(window);
glfwPollEvents();
@ -856,47 +860,11 @@ int main(int argc, char **argv) {
XDamageSubtract(dpy, de->damage, None, region);
XFixesDestroyRegion(dpy, region);
// TODO: Use a framebuffer instead. glCopyImageSubData requires
// opengl 4.2
glCopyImageSubData(
window_pixmap.texture_id, GL_TEXTURE_2D, 0, 0, 0, 0,
window_pixmap.target_texture_id, GL_TEXTURE_2D, 0, 0, 0, 0,
window_pixmap.texture_width, window_pixmap.texture_height, 1);
// int err = glGetError();
// fprintf(stderr, "error: %d\n", err);
CUDA_MEMCPY2D memcpy_struct;
memcpy_struct.srcXInBytes = 0;
memcpy_struct.srcY = 0;
memcpy_struct.srcMemoryType = CUmemorytype::CU_MEMORYTYPE_ARRAY;
memcpy_struct.dstXInBytes = 0;
memcpy_struct.dstY = 0;
memcpy_struct.dstMemoryType = CUmemorytype::CU_MEMORYTYPE_DEVICE;
memcpy_struct.srcArray = mapped_array;
memcpy_struct.dstDevice = (CUdeviceptr)frame->data[0];
memcpy_struct.dstPitch = frame->linesize[0];
memcpy_struct.WidthInBytes = frame->width * 4;
memcpy_struct.Height = frame->height;
cuMemcpy2D(&memcpy_struct);
// res = cuCtxPopCurrent(&old_ctx);
}
++fps_counter;
double time_now = glfwGetTime();
double frame_timer_elapsed = time_now - frame_timer_start;
double elapsed = time_now - start_time;
if (elapsed >= 1.0) {
fprintf(stderr, "fps: %d\n", fps_counter);
start_time = time_now;
current_fps = fps_counter;
fps_counter = 0;
redraw = true;
}
const double window_resize_timeout = 1.0; // 1 second
if(window_resized && time_now - window_resize_timer >= window_resize_timeout) {
if(window_resized && glfwGetTime() - window_resize_timer >= window_resize_timeout) {
window_resized = false;
fprintf(stderr, "Resize window!\n");
recreate_window_pixmap(dpy, src_window_id, window_pixmap);
@ -930,9 +898,51 @@ int main(int argc, char **argv) {
}
}
++fps_counter;
double time_now = glfwGetTime();
double frame_timer_elapsed = time_now - frame_timer_start;
double elapsed = time_now - start_time;
if (elapsed >= 1.0) {
fprintf(stderr, "fps: %d\n", fps_counter);
start_time = time_now;
current_fps = fps_counter;
fps_counter = 0;
}
double frame_time_overflow = frame_timer_elapsed - target_fps;
if (frame_time_overflow >= 0.0) {
frame_timer_start = time_now - frame_time_overflow;
if(redraw) {
redraw = false;
// TODO: Use a framebuffer instead. glCopyImageSubData requires
// opengl 4.2
glCopyImageSubData(
window_pixmap.texture_id, GL_TEXTURE_2D, 0, 0, 0, 0,
window_pixmap.target_texture_id, GL_TEXTURE_2D, 0, 0, 0, 0,
window_pixmap.texture_width, window_pixmap.texture_height, 1);
// int err = glGetError();
// fprintf(stderr, "error: %d\n", err);
CUDA_MEMCPY2D memcpy_struct;
memcpy_struct.srcXInBytes = 0;
memcpy_struct.srcY = 0;
memcpy_struct.srcMemoryType = CUmemorytype::CU_MEMORYTYPE_ARRAY;
memcpy_struct.dstXInBytes = 0;
memcpy_struct.dstY = 0;
memcpy_struct.dstMemoryType = CUmemorytype::CU_MEMORYTYPE_DEVICE;
memcpy_struct.srcArray = mapped_array;
memcpy_struct.dstDevice = (CUdeviceptr)frame->data[0];
memcpy_struct.dstPitch = frame->linesize[0];
memcpy_struct.WidthInBytes = frame->width * 4;
memcpy_struct.Height = frame->height;
cuMemcpy2D(&memcpy_struct);
// res = cuCtxPopCurrent(&old_ctx);
}
frame->pts = frame_count;
frame_count += 1;
if (avcodec_send_frame(video_stream->codec, frame) >= 0) {
@ -945,7 +955,11 @@ int main(int argc, char **argv) {
// av_frame_free(&frame);
usleep(5000);
double frame_end = glfwGetTime();
double frame_sleep_fps = 1.0 / 250.0;
double sleep_time = frame_sleep_fps - (frame_end - frame_start);
if(sleep_time > 0.0)
usleep(sleep_time * 1000.0 * 1000.0);
}
running = false;