From 6a6bb703bce2d844175950ede4bda5d06dc5a8ae Mon Sep 17 00:00:00 2001 From: dec05eba Date: Mon, 17 Oct 2022 02:55:59 +0200 Subject: wip intel --- src/capture/xcomposite.c | 517 ----------------------------------------------- 1 file changed, 517 deletions(-) delete mode 100644 src/capture/xcomposite.c (limited to 'src/capture/xcomposite.c') diff --git a/src/capture/xcomposite.c b/src/capture/xcomposite.c deleted file mode 100644 index 755ac92..0000000 --- a/src/capture/xcomposite.c +++ /dev/null @@ -1,517 +0,0 @@ -#include "../../include/capture/xcomposite.h" -#include "../../include/gl.h" -#include "../../include/cuda.h" -#include "../../include/window_texture.h" -#include "../../include/time.h" -#include -#include -#include -#include -#include - -/* TODO: Proper error checks and cleanups */ - -typedef struct { - gsr_capture_xcomposite_params params; - Display *dpy; - XEvent xev; - bool should_stop; - bool stop_is_error; - bool window_resized; - bool created_hw_frame; - double window_resize_timer; - - vec2i window_size; - vec2i window_pos; - - unsigned int target_texture_id; - vec2i texture_size; - Window composite_window; - WindowTexture window_texture; - - CUgraphicsResource cuda_graphics_resource; - CUarray mapped_array; - - gsr_gl gl; - gsr_cuda cuda; -} gsr_capture_xcomposite; - -static int max_int(int a, int b) { - return a > b ? a : b; -} - -static int min_int(int a, int b) { - return a < b ? a : b; -} - -static void gsr_capture_xcomposite_stop(gsr_capture *cap, AVCodecContext *video_codec_context); - -static Window get_compositor_window(Display *display) { - Window overlay_window = XCompositeGetOverlayWindow(display, DefaultRootWindow(display)); - XCompositeReleaseOverlayWindow(display, DefaultRootWindow(display)); - - Window root_window, parent_window; - Window *children = NULL; - unsigned int num_children = 0; - if(XQueryTree(display, overlay_window, &root_window, &parent_window, &children, &num_children) == 0) - return None; - - Window compositor_window = None; - if(num_children == 1) { - compositor_window = children[0]; - const int screen_width = XWidthOfScreen(DefaultScreenOfDisplay(display)); - const int screen_height = XHeightOfScreen(DefaultScreenOfDisplay(display)); - - XWindowAttributes attr; - if(!XGetWindowAttributes(display, compositor_window, &attr) || attr.width != screen_width || attr.height != screen_height) - compositor_window = None; - } - - if(children) - XFree(children); - - return compositor_window; -} - -/* TODO: check for glx swap control extension string (GLX_EXT_swap_control, etc) */ -static void set_vertical_sync_enabled(Display *display, Window window, gsr_gl *gl, bool enabled) { - int result = 0; - - if(gl->glXSwapIntervalEXT) { - gl->glXSwapIntervalEXT(display, window, enabled ? 1 : 0); - } else if(gl->glXSwapIntervalMESA) { - result = gl->glXSwapIntervalMESA(enabled ? 1 : 0); - } else if(gl->glXSwapIntervalSGI) { - result = gl->glXSwapIntervalSGI(enabled ? 1 : 0); - } else { - static int warned = 0; - if (!warned) { - warned = 1; - fprintf(stderr, "Warning: setting vertical sync not supported\n"); - } - } - - if(result != 0) - fprintf(stderr, "Warning: setting vertical sync failed\n"); -} - -static bool cuda_register_opengl_texture(gsr_capture_xcomposite *cap_xcomp) { - CUresult res; - CUcontext old_ctx; - res = cap_xcomp->cuda.cuCtxPushCurrent_v2(cap_xcomp->cuda.cu_ctx); - res = cap_xcomp->cuda.cuGraphicsGLRegisterImage( - &cap_xcomp->cuda_graphics_resource, cap_xcomp->target_texture_id, GL_TEXTURE_2D, - CU_GRAPHICS_REGISTER_FLAGS_READ_ONLY); - if (res != CUDA_SUCCESS) { - const char *err_str = "unknown"; - cap_xcomp->cuda.cuGetErrorString(res, &err_str); - fprintf(stderr, - "Error: cuGraphicsGLRegisterImage failed, error %s, texture " - "id: %u\n", - err_str, cap_xcomp->target_texture_id); - return false; - } - - /* Get texture */ - res = cap_xcomp->cuda.cuGraphicsResourceSetMapFlags(cap_xcomp->cuda_graphics_resource, CU_GRAPHICS_MAP_RESOURCE_FLAGS_READ_ONLY); - res = cap_xcomp->cuda.cuGraphicsMapResources(1, &cap_xcomp->cuda_graphics_resource, 0); - - /* Map texture to cuda array */ - res = cap_xcomp->cuda.cuGraphicsSubResourceGetMappedArray(&cap_xcomp->mapped_array, cap_xcomp->cuda_graphics_resource, 0, 0); - res = cap_xcomp->cuda.cuCtxPopCurrent_v2(&old_ctx); - return true; -} - -static bool cuda_create_codec_context(gsr_capture_xcomposite *cap_xcomp, AVCodecContext *video_codec_context) { - CUcontext old_ctx; - cap_xcomp->cuda.cuCtxPushCurrent_v2(cap_xcomp->cuda.cu_ctx); - - AVBufferRef *device_ctx = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_CUDA); - if(!device_ctx) { - fprintf(stderr, "Error: Failed to create hardware device context\n"); - return false; - } - - AVHWDeviceContext *hw_device_context = (AVHWDeviceContext*)device_ctx->data; - AVCUDADeviceContext *cuda_device_context = (AVCUDADeviceContext*)hw_device_context->hwctx; - cuda_device_context->cuda_ctx = cap_xcomp->cuda.cu_ctx; - if(av_hwdevice_ctx_init(device_ctx) < 0) { - fprintf(stderr, "Error: Failed to create hardware device context\n"); - av_buffer_unref(&device_ctx); - cap_xcomp->cuda.cuCtxPopCurrent_v2(&old_ctx); - return false; - } - - AVBufferRef *frame_context = av_hwframe_ctx_alloc(device_ctx); - if(!frame_context) { - fprintf(stderr, "Error: Failed to create hwframe context\n"); - av_buffer_unref(&device_ctx); - cap_xcomp->cuda.cuCtxPopCurrent_v2(&old_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 = AV_PIX_FMT_0RGB32; - hw_frame_context->format = video_codec_context->pix_fmt; - hw_frame_context->device_ref = device_ctx; - hw_frame_context->device_ctx = (AVHWDeviceContext*)device_ctx->data; - - if (av_hwframe_ctx_init(frame_context) < 0) { - fprintf(stderr, "Error: Failed to initialize hardware frame context " - "(note: ffmpeg version needs to be > 4.0)\n"); - av_buffer_unref(&device_ctx); - av_buffer_unref(&frame_context); - cap_xcomp->cuda.cuCtxPopCurrent_v2(&old_ctx); - return false; - } - - video_codec_context->hw_device_ctx = device_ctx; - video_codec_context->hw_frames_ctx = frame_context; - return true; -} - -static unsigned int gl_create_texture(gsr_capture_xcomposite *cap_xcomp, int width, int height) { - // Generating this second texture is needed because - // cuGraphicsGLRegisterImage cant be used with the texture that is mapped - // directly to the pixmap. - // TODO: Investigate if it's somehow possible to use the pixmap texture - // directly, this should improve performance since only less image copy is - // then needed every frame. - // Ignoring failure for now.. TODO: Show proper error - unsigned int texture_id = 0; - cap_xcomp->gl.glGenTextures(1, &texture_id); - cap_xcomp->gl.glBindTexture(GL_TEXTURE_2D, texture_id); - cap_xcomp->gl.glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL); - - cap_xcomp->gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); - cap_xcomp->gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); - cap_xcomp->gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - cap_xcomp->gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - - cap_xcomp->gl.glBindTexture(GL_TEXTURE_2D, 0); - return texture_id; -} - -static int gsr_capture_xcomposite_start(gsr_capture *cap, AVCodecContext *video_codec_context) { - gsr_capture_xcomposite *cap_xcomp = cap->priv; - - XWindowAttributes attr; - if(!XGetWindowAttributes(cap_xcomp->dpy, cap_xcomp->params.window, &attr)) { - fprintf(stderr, "gsr error: gsr_capture_xcomposite_start failed: invalid window id: %lu\n", cap_xcomp->params.window); - return -1; - } - - cap_xcomp->window_size.x = max_int(attr.width, 0); - cap_xcomp->window_size.y = max_int(attr.height, 0); - Window c; - XTranslateCoordinates(cap_xcomp->dpy, cap_xcomp->params.window, DefaultRootWindow(cap_xcomp->dpy), 0, 0, &cap_xcomp->window_pos.x, &cap_xcomp->window_pos.y, &c); - - XSelectInput(cap_xcomp->dpy, cap_xcomp->params.window, StructureNotifyMask | ExposureMask); - - if(!gsr_gl_load(&cap_xcomp->gl, cap_xcomp->dpy)) { - fprintf(stderr, "gsr error: gsr_capture_xcomposite_start: failed to load opengl\n"); - return -1; - } - - set_vertical_sync_enabled(cap_xcomp->dpy, cap_xcomp->gl.window, &cap_xcomp->gl, false); - if(window_texture_init(&cap_xcomp->window_texture, cap_xcomp->dpy, cap_xcomp->params.window, &cap_xcomp->gl) != 0) { - fprintf(stderr, "gsr error: gsr_capture_xcomposite_start: failed get window texture for window %ld\n", cap_xcomp->params.window); - gsr_gl_unload(&cap_xcomp->gl); - return -1; - } - - cap_xcomp->gl.glBindTexture(GL_TEXTURE_2D, window_texture_get_opengl_texture_id(&cap_xcomp->window_texture)); - cap_xcomp->texture_size.x = 0; - cap_xcomp->texture_size.y = 0; - cap_xcomp->gl.glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &cap_xcomp->texture_size.x); - cap_xcomp->gl.glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &cap_xcomp->texture_size.y); - cap_xcomp->gl.glBindTexture(GL_TEXTURE_2D, 0); - - cap_xcomp->texture_size.x = max_int(2, cap_xcomp->texture_size.x & ~1); - cap_xcomp->texture_size.y = max_int(2, cap_xcomp->texture_size.y & ~1); - - cap_xcomp->target_texture_id = gl_create_texture(cap_xcomp, cap_xcomp->texture_size.x, cap_xcomp->texture_size.y); - if(cap_xcomp->target_texture_id == 0) { - fprintf(stderr, "gsr error: gsr_capture_xcomposite_start: failed to create opengl texture\n"); - gsr_capture_xcomposite_stop(cap, video_codec_context); - return -1; - } - - video_codec_context->width = cap_xcomp->texture_size.x; - video_codec_context->height = cap_xcomp->texture_size.y; - - if(!gsr_cuda_load(&cap_xcomp->cuda)) { - gsr_capture_xcomposite_stop(cap, video_codec_context); - return -1; - } - - if(!cuda_create_codec_context(cap_xcomp, video_codec_context)) { - gsr_capture_xcomposite_stop(cap, video_codec_context); - return -1; - } - - if(!cuda_register_opengl_texture(cap_xcomp)) { - gsr_capture_xcomposite_stop(cap, video_codec_context); - return -1; - } - - cap_xcomp->window_resize_timer = clock_get_monotonic_seconds(); - return 0; -} - -static void gsr_capture_xcomposite_stop(gsr_capture *cap, AVCodecContext *video_codec_context) { - gsr_capture_xcomposite *cap_xcomp = cap->priv; - - window_texture_deinit(&cap_xcomp->window_texture); - - if(cap_xcomp->target_texture_id) { - cap_xcomp->gl.glDeleteTextures(1, &cap_xcomp->target_texture_id); - cap_xcomp->target_texture_id = 0; - } - - if(cap_xcomp->composite_window) { - XCompositeUnredirectWindow(cap_xcomp->dpy, cap_xcomp->composite_window, CompositeRedirectAutomatic); - cap_xcomp->composite_window = None; - } - - av_buffer_unref(&video_codec_context->hw_device_ctx); - av_buffer_unref(&video_codec_context->hw_frames_ctx); - - cap_xcomp->cuda.cuGraphicsUnmapResources(1, &cap_xcomp->cuda_graphics_resource, 0); - cap_xcomp->cuda.cuGraphicsUnregisterResource(cap_xcomp->cuda_graphics_resource); - gsr_cuda_unload(&cap_xcomp->cuda); - - gsr_gl_unload(&cap_xcomp->gl); - if(cap_xcomp->dpy) { - XCloseDisplay(cap_xcomp->dpy); - cap_xcomp->dpy = NULL; - } -} - -static void gsr_capture_xcomposite_tick(gsr_capture *cap, AVCodecContext *video_codec_context, AVFrame **frame) { - gsr_capture_xcomposite *cap_xcomp = cap->priv; - - cap_xcomp->gl.glClear(GL_COLOR_BUFFER_BIT); - - if(!cap_xcomp->created_hw_frame) { - CUcontext old_ctx; - cap_xcomp->cuda.cuCtxPushCurrent_v2(cap_xcomp->cuda.cu_ctx); - - if(av_hwframe_get_buffer(video_codec_context->hw_frames_ctx, *frame, 0) < 0) { - fprintf(stderr, "gsr error: gsr_capture_xcomposite_tick: av_hwframe_get_buffer failed\n"); - cap_xcomp->should_stop = true; - cap_xcomp->stop_is_error = true; - cap_xcomp->cuda.cuCtxPopCurrent_v2(&old_ctx); - return; - } - - cap_xcomp->created_hw_frame = true; - cap_xcomp->cuda.cuCtxPopCurrent_v2(&old_ctx); - } - - if(XCheckTypedWindowEvent(cap_xcomp->dpy, cap_xcomp->params.window, DestroyNotify, &cap_xcomp->xev)) { - cap_xcomp->should_stop = true; - cap_xcomp->stop_is_error = false; - } - - if(XCheckTypedWindowEvent(cap_xcomp->dpy, cap_xcomp->params.window, Expose, &cap_xcomp->xev) && cap_xcomp->xev.xexpose.count == 0) { - cap_xcomp->window_resize_timer = clock_get_monotonic_seconds(); - cap_xcomp->window_resized = true; - } - - if(XCheckTypedWindowEvent(cap_xcomp->dpy, cap_xcomp->params.window, ConfigureNotify, &cap_xcomp->xev) && cap_xcomp->xev.xconfigure.window == cap_xcomp->params.window) { - while(XCheckTypedWindowEvent(cap_xcomp->dpy, cap_xcomp->params.window, ConfigureNotify, &cap_xcomp->xev)) {} - Window c; - XTranslateCoordinates(cap_xcomp->dpy, cap_xcomp->params.window, DefaultRootWindow(cap_xcomp->dpy), 0, 0, &cap_xcomp->xev.xconfigure.x, &cap_xcomp->xev.xconfigure.y, &c); - cap_xcomp->window_pos.x = cap_xcomp->xev.xconfigure.x; - cap_xcomp->window_pos.y = cap_xcomp->xev.xconfigure.y; - - /* Window resize */ - if(cap_xcomp->xev.xconfigure.width != cap_xcomp->window_size.x || cap_xcomp->xev.xconfigure.height != cap_xcomp->window_size.y) { - cap_xcomp->window_size.x = max_int(cap_xcomp->xev.xconfigure.width, 0); - cap_xcomp->window_size.y = max_int(cap_xcomp->xev.xconfigure.height, 0); - cap_xcomp->window_resize_timer = clock_get_monotonic_seconds(); - cap_xcomp->window_resized = true; - } - } - - const double window_resize_timeout = 1.0; // 1 second - if(cap_xcomp->window_resized && clock_get_monotonic_seconds() - cap_xcomp->window_resize_timer >= window_resize_timeout) { - cap_xcomp->window_resized = false; - fprintf(stderr, "Resize window!\n"); - if(window_texture_on_resize(&cap_xcomp->window_texture) != 0) { - fprintf(stderr, "gsr error: gsr_capture_xcomposite_tick: window_texture_on_resize failed\n"); - cap_xcomp->should_stop = true; - cap_xcomp->stop_is_error = true; - return; - } - - cap_xcomp->gl.glBindTexture(GL_TEXTURE_2D, window_texture_get_opengl_texture_id(&cap_xcomp->window_texture)); - cap_xcomp->texture_size.x = 0; - cap_xcomp->texture_size.y = 0; - cap_xcomp->gl.glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &cap_xcomp->texture_size.x); - cap_xcomp->gl.glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &cap_xcomp->texture_size.y); - cap_xcomp->gl.glBindTexture(GL_TEXTURE_2D, 0); - - cap_xcomp->texture_size.x = min_int(video_codec_context->width, max_int(2, cap_xcomp->texture_size.x & ~1)); - cap_xcomp->texture_size.y = min_int(video_codec_context->height, max_int(2, cap_xcomp->texture_size.y & ~1)); - - cap_xcomp->gl.glBindTexture(GL_TEXTURE_2D, cap_xcomp->target_texture_id); - cap_xcomp->gl.glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, cap_xcomp->texture_size.x, cap_xcomp->texture_size.y, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL); - cap_xcomp->gl.glBindTexture(GL_TEXTURE_2D, 0); - - CUcontext old_ctx; - CUresult res = cap_xcomp->cuda.cuCtxPushCurrent_v2(cap_xcomp->cuda.cu_ctx); - - cap_xcomp->cuda.cuGraphicsUnmapResources(1, &cap_xcomp->cuda_graphics_resource, 0); - cap_xcomp->cuda.cuGraphicsUnregisterResource(cap_xcomp->cuda_graphics_resource); - res = cap_xcomp->cuda.cuGraphicsGLRegisterImage(&cap_xcomp->cuda_graphics_resource, cap_xcomp->target_texture_id, GL_TEXTURE_2D, CU_GRAPHICS_REGISTER_FLAGS_READ_ONLY); - if (res != CUDA_SUCCESS) { - const char *err_str = "unknown"; - cap_xcomp->cuda.cuGetErrorString(res, &err_str); - fprintf(stderr, "gsr error: gsr_capture_xcomposite_tick: cuGraphicsGLRegisterImage failed, error %s, texture id: %u\n", err_str, cap_xcomp->target_texture_id); - cap_xcomp->should_stop = true; - cap_xcomp->stop_is_error = true; - res = cap_xcomp->cuda.cuCtxPopCurrent_v2(&old_ctx); - return; - } - - res = cap_xcomp->cuda.cuGraphicsResourceSetMapFlags(cap_xcomp->cuda_graphics_resource, CU_GRAPHICS_MAP_RESOURCE_FLAGS_READ_ONLY); - res = cap_xcomp->cuda.cuGraphicsMapResources(1, &cap_xcomp->cuda_graphics_resource, 0); - res = cap_xcomp->cuda.cuGraphicsSubResourceGetMappedArray(&cap_xcomp->mapped_array, cap_xcomp->cuda_graphics_resource, 0, 0); - - av_frame_free(frame); - *frame = av_frame_alloc(); - if(!frame) { - fprintf(stderr, "gsr error: gsr_capture_xcomposite_tick: failed to allocate frame\n"); - cap_xcomp->should_stop = true; - cap_xcomp->stop_is_error = true; - res = cap_xcomp->cuda.cuCtxPopCurrent_v2(&old_ctx); - return; - } - (*frame)->format = video_codec_context->pix_fmt; - (*frame)->width = video_codec_context->width; - (*frame)->height = video_codec_context->height; - - if(av_hwframe_get_buffer(video_codec_context->hw_frames_ctx, *frame, 0) < 0) { - fprintf(stderr, "gsr error: gsr_capture_xcomposite_tick: av_hwframe_get_buffer failed\n"); - cap_xcomp->should_stop = true; - cap_xcomp->stop_is_error = true; - res = cap_xcomp->cuda.cuCtxPopCurrent_v2(&old_ctx); - return; - } - - // Make it completely black to clear unused parts - // TODO: cuMemsetD32? - res = cap_xcomp->cuda.cuMemsetD8_v2((CUdeviceptr)(*frame)->data[0], 0, (*frame)->width * (*frame)->height * 4); - res = cap_xcomp->cuda.cuCtxPopCurrent_v2(&old_ctx); - } -} - -static bool gsr_capture_xcomposite_should_stop(gsr_capture *cap, bool *err) { - gsr_capture_xcomposite *cap_xcomp = cap->priv; - if(cap_xcomp->should_stop) { - if(err) - *err = cap_xcomp->stop_is_error; - return true; - } - - if(err) - *err = false; - return false; -} - -static int gsr_capture_xcomposite_capture(gsr_capture *cap, AVFrame *frame) { - gsr_capture_xcomposite *cap_xcomp = cap->priv; - - // TODO: Use a framebuffer instead. glCopyImageSubData requires opengl 4.2 - vec2i source_pos = { 0, 0 }; - vec2i source_size = cap_xcomp->texture_size; - - // Requires opengl 4.2... TODO: Replace with earlier opengl if opengl < 4.2. - cap_xcomp->gl.glCopyImageSubData( - window_texture_get_opengl_texture_id(&cap_xcomp->window_texture), GL_TEXTURE_2D, 0, source_pos.x, source_pos.y, 0, - cap_xcomp->target_texture_id, GL_TEXTURE_2D, 0, 0, 0, 0, - source_size.x, source_size.y, 1); - unsigned int err = cap_xcomp->gl.glGetError(); - if(err != 0) { - static bool error_shown = false; - if(!error_shown) { - error_shown = true; - fprintf(stderr, "Error: glCopyImageSubData failed, gl error: %d\n", err); - } - } - cap_xcomp->gl.glXSwapBuffers(cap_xcomp->dpy, cap_xcomp->gl.window); - // TODO: Remove this copy, which is only possible by using nvenc directly and encoding window_pixmap.target_texture_id - - frame->linesize[0] = frame->width * 4; - - 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_xcomp->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; - cap_xcomp->cuda.cuMemcpy2D_v2(&memcpy_struct); - - return 0; -} - -static void gsr_capture_xcomposite_destroy(gsr_capture *cap, AVCodecContext *video_codec_context) { - gsr_capture_xcomposite_stop(cap, video_codec_context); - if(cap->priv) { - free(cap->priv); - cap->priv = NULL; - } - free(cap); -} - -gsr_capture* gsr_capture_xcomposite_create(const gsr_capture_xcomposite_params *params) { - if(!params) { - fprintf(stderr, "gsr error: gsr_capture_xcomposite_create params is NULL\n"); - return NULL; - } - - gsr_capture *cap = calloc(1, sizeof(gsr_capture)); - if(!cap) - return NULL; - - gsr_capture_xcomposite *cap_xcomp = calloc(1, sizeof(gsr_capture_xcomposite)); - if(!cap_xcomp) { - free(cap); - return NULL; - } - - Display *display = XOpenDisplay(NULL); - if(!display) { - fprintf(stderr, "gsr error: gsr_capture_xcomposite_create failed: XOpenDisplay failed\n"); - free(cap); - free(cap_xcomp); - return NULL; - } - - cap_xcomp->dpy = display; - cap_xcomp->params = *params; - - *cap = (gsr_capture) { - .start = gsr_capture_xcomposite_start, - .tick = gsr_capture_xcomposite_tick, - .should_stop = gsr_capture_xcomposite_should_stop, - .capture = gsr_capture_xcomposite_capture, - .destroy = gsr_capture_xcomposite_destroy, - .priv = cap_xcomp - }; - - return cap; -} -- cgit v1.2.3