diff options
Diffstat (limited to 'src/capture/nvfbc.c')
| -rw-r--r-- | src/capture/nvfbc.c | 535 |
1 files changed, 535 insertions, 0 deletions
diff --git a/src/capture/nvfbc.c b/src/capture/nvfbc.c new file mode 100644 index 0000000..9eabb18 --- /dev/null +++ b/src/capture/nvfbc.c @@ -0,0 +1,535 @@ +#include "../../include/capture/nvfbc.h" +#include "../../external/NvFBC.h" +#include "../../include/cuda.h" +#include "../../include/egl.h" +#include "../../include/utils.h" +#include <dlfcn.h> +#include <stdlib.h> +#include <string.h> +#include <stdio.h> +#include <math.h> +#include <X11/Xlib.h> +#include <libavutil/hwcontext.h> +#include <libavutil/hwcontext_cuda.h> +#include <libavutil/frame.h> +#include <libavutil/version.h> +#include <libavcodec/avcodec.h> + +typedef struct { + gsr_capture_base base; + gsr_capture_nvfbc_params params; + void *library; + + NVFBC_SESSION_HANDLE nv_fbc_handle; + PNVFBCCREATEINSTANCE nv_fbc_create_instance; + NVFBC_API_FUNCTION_LIST nv_fbc_function_list; + bool fbc_handle_created; + bool capture_session_created; + + gsr_cuda cuda; + CUgraphicsResource cuda_graphics_resources[2]; + CUarray mapped_arrays[2]; + CUstream cuda_stream; // TODO: asdasdsa + NVFBC_TOGL_SETUP_PARAMS setup_params; + + bool direct_capture; + bool supports_direct_cursor; + bool capture_region; + uint32_t x, y, width, height; + NVFBC_TRACKING_TYPE tracking_type; + uint32_t output_id; + uint32_t tracking_width, tracking_height; + bool nvfbc_needs_recreate; + double nvfbc_dead_start; +} gsr_capture_nvfbc; + +#if defined(_WIN64) || defined(__LP64__) +typedef unsigned long long CUdeviceptr_v2; +#else +typedef unsigned int CUdeviceptr_v2; +#endif +typedef CUdeviceptr_v2 CUdeviceptr; + +static int max_int(int a, int b) { + return a > b ? a : b; +} + +/* Returns 0 on failure */ +static uint32_t get_output_id_from_display_name(NVFBC_RANDR_OUTPUT_INFO *outputs, uint32_t num_outputs, const char *display_name, uint32_t *width, uint32_t *height) { + if(!outputs) + return 0; + + for(uint32_t i = 0; i < num_outputs; ++i) { + if(strcmp(outputs[i].name, display_name) == 0) { + *width = outputs[i].trackedBox.w; + *height = outputs[i].trackedBox.h; + return outputs[i].dwId; + } + } + + return 0; +} + +/* TODO: Test with optimus and open kernel modules */ +static bool get_driver_version(int *major, int *minor) { + *major = 0; + *minor = 0; + + FILE *f = fopen("/proc/driver/nvidia/version", "rb"); + if(!f) { + fprintf(stderr, "gsr warning: failed to get nvidia driver version (failed to read /proc/driver/nvidia/version)\n"); + return false; + } + + char buffer[2048]; + size_t bytes_read = fread(buffer, 1, sizeof(buffer) - 1, f); + buffer[bytes_read] = '\0'; + + bool success = false; + const char *p = strstr(buffer, "Kernel Module"); + if(p) { + p += 13; + int driver_major_version = 0, driver_minor_version = 0; + if(sscanf(p, "%d.%d", &driver_major_version, &driver_minor_version) == 2) { + *major = driver_major_version; + *minor = driver_minor_version; + success = true; + } + } + + if(!success) + fprintf(stderr, "gsr warning: failed to get nvidia driver version\n"); + + fclose(f); + return success; +} + +static bool version_at_least(int major, int minor, int expected_major, int expected_minor) { + return major > expected_major || (major == expected_major && minor >= expected_minor); +} + +static bool version_less_than(int major, int minor, int expected_major, int expected_minor) { + return major < expected_major || (major == expected_major && minor < expected_minor); +} + +static void set_func_ptr(void **dst, void *src) { + *dst = src; +} + +static bool gsr_capture_nvfbc_load_library(gsr_capture *cap) { + gsr_capture_nvfbc *cap_nvfbc = cap->priv; + + dlerror(); /* clear */ + void *lib = dlopen("libnvidia-fbc.so.1", RTLD_LAZY); + if(!lib) { + fprintf(stderr, "gsr error: failed to load libnvidia-fbc.so.1, error: %s\n", dlerror()); + return false; + } + + set_func_ptr((void**)&cap_nvfbc->nv_fbc_create_instance, dlsym(lib, "NvFBCCreateInstance")); + if(!cap_nvfbc->nv_fbc_create_instance) { + fprintf(stderr, "gsr error: unable to resolve symbol 'NvFBCCreateInstance'\n"); + dlclose(lib); + return false; + } + + memset(&cap_nvfbc->nv_fbc_function_list, 0, sizeof(cap_nvfbc->nv_fbc_function_list)); + cap_nvfbc->nv_fbc_function_list.dwVersion = NVFBC_VERSION; + NVFBCSTATUS status = cap_nvfbc->nv_fbc_create_instance(&cap_nvfbc->nv_fbc_function_list); + if(status != NVFBC_SUCCESS) { + fprintf(stderr, "gsr error: failed to create NvFBC instance (status: %d)\n", status); + dlclose(lib); + return false; + } + + cap_nvfbc->library = lib; + return true; +} + +/* TODO: check for glx swap control extension string (GLX_EXT_swap_control, etc) */ +static void set_vertical_sync_enabled(gsr_egl *egl, int enabled) { + int result = 0; + + if(egl->glXSwapIntervalEXT) { + egl->glXSwapIntervalEXT(egl->x11.dpy, egl->x11.window, enabled ? 1 : 0); + } else if(egl->glXSwapIntervalMESA) { + result = egl->glXSwapIntervalMESA(enabled ? 1 : 0); + } else if(egl->glXSwapIntervalSGI) { + result = egl->glXSwapIntervalSGI(enabled ? 1 : 0); + } else { + static int warned = 0; + if (!warned) { + warned = 1; + fprintf(stderr, "gsr warning: setting vertical sync not supported\n"); + } + } + + if(result != 0) + fprintf(stderr, "gsr warning: setting vertical sync failed\n"); +} + +static void gsr_capture_nvfbc_destroy_session(gsr_capture_nvfbc *cap_nvfbc) { + if(cap_nvfbc->fbc_handle_created && cap_nvfbc->capture_session_created) { + NVFBC_DESTROY_CAPTURE_SESSION_PARAMS destroy_capture_params; + memset(&destroy_capture_params, 0, sizeof(destroy_capture_params)); + destroy_capture_params.dwVersion = NVFBC_DESTROY_CAPTURE_SESSION_PARAMS_VER; + cap_nvfbc->nv_fbc_function_list.nvFBCDestroyCaptureSession(cap_nvfbc->nv_fbc_handle, &destroy_capture_params); + cap_nvfbc->capture_session_created = false; + } +} + +static void gsr_capture_nvfbc_destroy_handle(gsr_capture_nvfbc *cap_nvfbc) { + if(cap_nvfbc->fbc_handle_created) { + NVFBC_DESTROY_HANDLE_PARAMS destroy_params; + memset(&destroy_params, 0, sizeof(destroy_params)); + destroy_params.dwVersion = NVFBC_DESTROY_HANDLE_PARAMS_VER; + cap_nvfbc->nv_fbc_function_list.nvFBCDestroyHandle(cap_nvfbc->nv_fbc_handle, &destroy_params); + cap_nvfbc->fbc_handle_created = false; + cap_nvfbc->nv_fbc_handle = 0; + } +} + +static void gsr_capture_nvfbc_destroy_session_and_handle(gsr_capture_nvfbc *cap_nvfbc) { + gsr_capture_nvfbc_destroy_session(cap_nvfbc); + gsr_capture_nvfbc_destroy_handle(cap_nvfbc); +} + +static int gsr_capture_nvfbc_setup_handle(gsr_capture_nvfbc *cap_nvfbc) { + NVFBCSTATUS status; + + NVFBC_CREATE_HANDLE_PARAMS create_params; + memset(&create_params, 0, sizeof(create_params)); + create_params.dwVersion = NVFBC_CREATE_HANDLE_PARAMS_VER; + create_params.bExternallyManagedContext = NVFBC_TRUE; + create_params.glxCtx = cap_nvfbc->params.egl->glx_context; + create_params.glxFBConfig = cap_nvfbc->params.egl->glx_fb_config; + + status = cap_nvfbc->nv_fbc_function_list.nvFBCCreateHandle(&cap_nvfbc->nv_fbc_handle, &create_params); + if(status != NVFBC_SUCCESS) { + // Reverse engineering for interoperability + const uint8_t enable_key[] = { 0xac, 0x10, 0xc9, 0x2e, 0xa5, 0xe6, 0x87, 0x4f, 0x8f, 0x4b, 0xf4, 0x61, 0xf8, 0x56, 0x27, 0xe9 }; + create_params.privateData = enable_key; + create_params.privateDataSize = 16; + + status = cap_nvfbc->nv_fbc_function_list.nvFBCCreateHandle(&cap_nvfbc->nv_fbc_handle, &create_params); + if(status != NVFBC_SUCCESS) { + fprintf(stderr, "gsr error: gsr_capture_nvfbc_start failed: %s\n", cap_nvfbc->nv_fbc_function_list.nvFBCGetLastErrorStr(cap_nvfbc->nv_fbc_handle)); + goto error_cleanup; + } + } + cap_nvfbc->fbc_handle_created = true; + + NVFBC_GET_STATUS_PARAMS status_params; + memset(&status_params, 0, sizeof(status_params)); + status_params.dwVersion = NVFBC_GET_STATUS_PARAMS_VER; + + status = cap_nvfbc->nv_fbc_function_list.nvFBCGetStatus(cap_nvfbc->nv_fbc_handle, &status_params); + if(status != NVFBC_SUCCESS) { + fprintf(stderr, "gsr error: gsr_capture_nvfbc_start failed: %s\n", cap_nvfbc->nv_fbc_function_list.nvFBCGetLastErrorStr(cap_nvfbc->nv_fbc_handle)); + goto error_cleanup; + } + + if(status_params.bCanCreateNow == NVFBC_FALSE) { + fprintf(stderr, "gsr error: gsr_capture_nvfbc_start failed: it's not possible to create a capture session on this system\n"); + goto error_cleanup; + } + + cap_nvfbc->tracking_width = XWidthOfScreen(DefaultScreenOfDisplay(cap_nvfbc->params.egl->x11.dpy)); + cap_nvfbc->tracking_height = XHeightOfScreen(DefaultScreenOfDisplay(cap_nvfbc->params.egl->x11.dpy)); + cap_nvfbc->tracking_type = strcmp(cap_nvfbc->params.display_to_capture, "screen") == 0 ? NVFBC_TRACKING_SCREEN : NVFBC_TRACKING_OUTPUT; + if(cap_nvfbc->tracking_type == NVFBC_TRACKING_OUTPUT) { + if(!status_params.bXRandRAvailable) { + fprintf(stderr, "gsr error: gsr_capture_nvfbc_start failed: the xrandr extension is not available\n"); + goto error_cleanup; + } + + if(status_params.bInModeset) { + fprintf(stderr, "gsr error: gsr_capture_nvfbc_start failed: the x server is in modeset, unable to record\n"); + goto error_cleanup; + } + + cap_nvfbc->output_id = get_output_id_from_display_name(status_params.outputs, status_params.dwOutputNum, cap_nvfbc->params.display_to_capture, &cap_nvfbc->tracking_width, &cap_nvfbc->tracking_height); + if(cap_nvfbc->output_id == 0) { + fprintf(stderr, "gsr error: gsr_capture_nvfbc_start failed: display '%s' not found\n", cap_nvfbc->params.display_to_capture); + goto error_cleanup; + } + } + + return 0; + + error_cleanup: + gsr_capture_nvfbc_destroy_session_and_handle(cap_nvfbc); + return -1; +} + +static int gsr_capture_nvfbc_setup_session(gsr_capture_nvfbc *cap_nvfbc) { + NVFBC_CREATE_CAPTURE_SESSION_PARAMS create_capture_params; + memset(&create_capture_params, 0, sizeof(create_capture_params)); + create_capture_params.dwVersion = NVFBC_CREATE_CAPTURE_SESSION_PARAMS_VER; + create_capture_params.eCaptureType = NVFBC_CAPTURE_TO_GL; + create_capture_params.bWithCursor = (!cap_nvfbc->direct_capture || cap_nvfbc->supports_direct_cursor) ? NVFBC_TRUE : NVFBC_FALSE; + if(!cap_nvfbc->params.record_cursor) + create_capture_params.bWithCursor = false; + if(cap_nvfbc->capture_region) + create_capture_params.captureBox = (NVFBC_BOX){ cap_nvfbc->x, cap_nvfbc->y, cap_nvfbc->width, cap_nvfbc->height }; + create_capture_params.eTrackingType = cap_nvfbc->tracking_type; + create_capture_params.dwSamplingRateMs = (uint32_t)ceilf(1000.0f / (float)cap_nvfbc->params.fps); + create_capture_params.bAllowDirectCapture = cap_nvfbc->direct_capture ? NVFBC_TRUE : NVFBC_FALSE; + create_capture_params.bPushModel = cap_nvfbc->direct_capture ? NVFBC_TRUE : NVFBC_FALSE; + create_capture_params.bDisableAutoModesetRecovery = true; + if(cap_nvfbc->tracking_type == NVFBC_TRACKING_OUTPUT) + create_capture_params.dwOutputId = cap_nvfbc->output_id; + + NVFBCSTATUS status = cap_nvfbc->nv_fbc_function_list.nvFBCCreateCaptureSession(cap_nvfbc->nv_fbc_handle, &create_capture_params); + if(status != NVFBC_SUCCESS) { + fprintf(stderr, "gsr error: gsr_capture_nvfbc_start failed: %s\n", cap_nvfbc->nv_fbc_function_list.nvFBCGetLastErrorStr(cap_nvfbc->nv_fbc_handle)); + return -1; + } + cap_nvfbc->capture_session_created = true; + + memset(&cap_nvfbc->setup_params, 0, sizeof(cap_nvfbc->setup_params)); + cap_nvfbc->setup_params.dwVersion = NVFBC_TOGL_SETUP_PARAMS_VER; + cap_nvfbc->setup_params.eBufferFormat = NVFBC_BUFFER_FORMAT_BGRA; + + status = cap_nvfbc->nv_fbc_function_list.nvFBCToGLSetUp(cap_nvfbc->nv_fbc_handle, &cap_nvfbc->setup_params); + if(status != NVFBC_SUCCESS) { + fprintf(stderr, "gsr error: gsr_capture_nvfbc_start failed: %s\n", cap_nvfbc->nv_fbc_function_list.nvFBCGetLastErrorStr(cap_nvfbc->nv_fbc_handle)); + gsr_capture_nvfbc_destroy_session(cap_nvfbc); + return -1; + } + + return 0; +} + +static int gsr_capture_nvfbc_start(gsr_capture *cap, AVCodecContext *video_codec_context, AVFrame *frame) { + gsr_capture_nvfbc *cap_nvfbc = cap->priv; + + cap_nvfbc->base.video_codec_context = video_codec_context; + cap_nvfbc->base.egl = cap_nvfbc->params.egl; + + if(!gsr_cuda_load(&cap_nvfbc->cuda, cap_nvfbc->params.egl->x11.dpy, cap_nvfbc->params.overclock)) + return -1; + + if(!gsr_capture_nvfbc_load_library(cap)) { + gsr_cuda_unload(&cap_nvfbc->cuda); + return -1; + } + + cap_nvfbc->x = max_int(cap_nvfbc->params.pos.x, 0); + cap_nvfbc->y = max_int(cap_nvfbc->params.pos.y, 0); + cap_nvfbc->width = max_int(cap_nvfbc->params.size.x, 0); + cap_nvfbc->height = max_int(cap_nvfbc->params.size.y, 0); + + cap_nvfbc->capture_region = (cap_nvfbc->x > 0 || cap_nvfbc->y > 0 || cap_nvfbc->width > 0 || cap_nvfbc->height > 0); + + cap_nvfbc->supports_direct_cursor = false; + bool direct_capture = cap_nvfbc->params.direct_capture; + int driver_major_version = 0; + int driver_minor_version = 0; + if(direct_capture && get_driver_version(&driver_major_version, &driver_minor_version)) { + fprintf(stderr, "Info: detected nvidia version: %d.%d\n", driver_major_version, driver_minor_version); + + // TODO: + if(version_at_least(driver_major_version, driver_minor_version, 515, 57) && version_less_than(driver_major_version, driver_minor_version, 520, 56)) { + direct_capture = false; + fprintf(stderr, "Warning: \"screen-direct\" has temporary been disabled as it causes stuttering with driver versions >= 515.57 and < 520.56. Please update your driver if possible. Capturing \"screen\" instead.\n"); + } + + // TODO: + // Cursor capture disabled because moving the cursor doesn't update capture rate to monitor hz and instead captures at 10-30 hz + /* + if(direct_capture) { + if(version_at_least(driver_major_version, driver_minor_version, 515, 57)) + supports_direct_cursor = true; + else + fprintf(stderr, "Info: capturing \"screen-direct\" but driver version appears to be less than 515.57. Disabling capture of cursor. Please update your driver if you want to capture your cursor or record \"screen\" instead.\n"); + } + */ + } + + if(gsr_capture_nvfbc_setup_handle(cap_nvfbc) != 0) { + goto error_cleanup; + } + + if(gsr_capture_nvfbc_setup_session(cap_nvfbc) != 0) { + goto error_cleanup; + } + + if(cap_nvfbc->capture_region) { + video_codec_context->width = cap_nvfbc->width & ~1; + video_codec_context->height = cap_nvfbc->height & ~1; + } else { + video_codec_context->width = cap_nvfbc->tracking_width & ~1; + video_codec_context->height = cap_nvfbc->tracking_height & ~1; + } + + frame->width = video_codec_context->width; + frame->height = video_codec_context->height; + + if(!cuda_create_codec_context(cap_nvfbc->cuda.cu_ctx, video_codec_context, video_codec_context->width, video_codec_context->height, false, &cap_nvfbc->cuda_stream)) + goto error_cleanup; + + gsr_cuda_context cuda_context = { + .cuda = &cap_nvfbc->cuda, + .cuda_graphics_resources = cap_nvfbc->cuda_graphics_resources, + .mapped_arrays = cap_nvfbc->mapped_arrays + }; + + // TODO: Remove this, it creates shit we dont need + if(!gsr_capture_base_setup_cuda_textures(&cap_nvfbc->base, frame, &cuda_context, cap_nvfbc->params.color_range, GSR_SOURCE_COLOR_BGR, cap_nvfbc->params.hdr)) { + goto error_cleanup; + } + /* Disable vsync */ + set_vertical_sync_enabled(cap_nvfbc->params.egl, 0); + + return 0; + + error_cleanup: + gsr_capture_nvfbc_destroy_session_and_handle(cap_nvfbc); + gsr_capture_base_stop(&cap_nvfbc->base); + gsr_cuda_unload(&cap_nvfbc->cuda); + return -1; +} + +static int gsr_capture_nvfbc_capture(gsr_capture *cap, AVFrame *frame) { + gsr_capture_nvfbc *cap_nvfbc = cap->priv; + + const double nvfbc_recreate_retry_time_seconds = 1.0; + if(cap_nvfbc->nvfbc_needs_recreate) { + const double now = clock_get_monotonic_seconds(); + if(now - cap_nvfbc->nvfbc_dead_start >= nvfbc_recreate_retry_time_seconds) { + cap_nvfbc->nvfbc_dead_start = now; + gsr_capture_nvfbc_destroy_session_and_handle(cap_nvfbc); + + if(gsr_capture_nvfbc_setup_handle(cap_nvfbc) != 0) { + fprintf(stderr, "gsr error: gsr_capture_nvfbc_capture failed to recreate nvfbc handle, trying again in %f second(s)\n", nvfbc_recreate_retry_time_seconds); + return -1; + } + + if(gsr_capture_nvfbc_setup_session(cap_nvfbc) != 0) { + fprintf(stderr, "gsr error: gsr_capture_nvfbc_capture failed to recreate nvfbc session, trying again in %f second(s)\n", nvfbc_recreate_retry_time_seconds); + return -1; + } + + cap_nvfbc->nvfbc_needs_recreate = false; + } else { + return 0; + } + } + + NVFBC_FRAME_GRAB_INFO frame_info; + memset(&frame_info, 0, sizeof(frame_info)); + + NVFBC_TOGL_GRAB_FRAME_PARAMS grab_params; + memset(&grab_params, 0, sizeof(grab_params)); + grab_params.dwVersion = NVFBC_TOGL_GRAB_FRAME_PARAMS_VER; + grab_params.dwFlags = NVFBC_TOGL_GRAB_FLAGS_NOWAIT | NVFBC_TOGL_GRAB_FLAGS_FORCE_REFRESH; // TODO: Remove NVFBC_TOGL_GRAB_FLAGS_FORCE_REFRESH + grab_params.pFrameGrabInfo = &frame_info; + grab_params.dwTimeoutMs = 0; + + NVFBCSTATUS status = cap_nvfbc->nv_fbc_function_list.nvFBCToGLGrabFrame(cap_nvfbc->nv_fbc_handle, &grab_params); + if(status != NVFBC_SUCCESS) { + fprintf(stderr, "gsr error: gsr_capture_nvfbc_capture failed: %s (%d), recreating session after %f second(s)\n", cap_nvfbc->nv_fbc_function_list.nvFBCGetLastErrorStr(cap_nvfbc->nv_fbc_handle), status, nvfbc_recreate_retry_time_seconds); + cap_nvfbc->nvfbc_needs_recreate = true; + cap_nvfbc->nvfbc_dead_start = clock_get_monotonic_seconds(); + return 0; + } + + //cap_nvfbc->params.egl->glClearColor(0.0f, 0.0f, 0.0f, 1.0f); + cap_nvfbc->params.egl->glClear(0); + + gsr_color_conversion_draw(&cap_nvfbc->base.color_conversion, cap_nvfbc->setup_params.dwTextures[grab_params.dwTextureIndex], + (vec2i){0, 0}, (vec2i){frame->width, frame->height}, + (vec2i){0, 0}, (vec2i){frame->width, frame->height}, + 0.0f, false); + + cap_nvfbc->params.egl->glXSwapBuffers(cap_nvfbc->params.egl->x11.dpy, cap_nvfbc->params.egl->x11.window); + + // TODO: HDR is broken + 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_nvfbc->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_nvfbc->params.hdr ? 2 : 1); + memcpy_struct.Height = frame->height / div[i]; + // TODO: Remove this copy if possible + cap_nvfbc->cuda.cuMemcpy2DAsync_v2(&memcpy_struct, cap_nvfbc->cuda_stream); + } + + // TODO: needed? + cap_nvfbc->cuda.cuStreamSynchronize(cap_nvfbc->cuda_stream); + + return 0; +} + +static void gsr_capture_nvfbc_destroy(gsr_capture *cap, AVCodecContext *video_codec_context) { + (void)video_codec_context; + gsr_capture_nvfbc *cap_nvfbc = cap->priv; + gsr_capture_nvfbc_destroy_session_and_handle(cap_nvfbc); + if(cap_nvfbc) { + gsr_capture_base_stop(&cap_nvfbc->base); + gsr_cuda_unload(&cap_nvfbc->cuda); + dlclose(cap_nvfbc->library); + free((void*)cap_nvfbc->params.display_to_capture); + cap_nvfbc->params.display_to_capture = NULL; + free(cap->priv); + cap->priv = NULL; + } + free(cap); +} + +gsr_capture* gsr_capture_nvfbc_create(const gsr_capture_nvfbc_params *params) { + if(!params) { + fprintf(stderr, "gsr error: gsr_capture_nvfbc_create params is NULL\n"); + return NULL; + } + + if(!params->display_to_capture) { + fprintf(stderr, "gsr error: gsr_capture_nvfbc_create params.display_to_capture is NULL\n"); + return NULL; + } + + gsr_capture *cap = calloc(1, sizeof(gsr_capture)); + if(!cap) + return NULL; + + gsr_capture_nvfbc *cap_nvfbc = calloc(1, sizeof(gsr_capture_nvfbc)); + if(!cap_nvfbc) { + free(cap); + return NULL; + } + + const char *display_to_capture = strdup(params->display_to_capture); + if(!display_to_capture) { + free(cap); + free(cap_nvfbc); + return NULL; + } + + cap_nvfbc->params = *params; + cap_nvfbc->params.display_to_capture = display_to_capture; + cap_nvfbc->params.fps = max_int(cap_nvfbc->params.fps, 1); + + *cap = (gsr_capture) { + .start = gsr_capture_nvfbc_start, + .tick = NULL, + .should_stop = NULL, + .capture = gsr_capture_nvfbc_capture, + .capture_end = NULL, + .destroy = gsr_capture_nvfbc_destroy, + .priv = cap_nvfbc + }; + + return cap; +} |