Refactor nvfbc into abstract capture api
This commit is contained in:
dec05eba
17
src/capture/capture.c
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17
src/capture/capture.c
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@@ -0,0 +1,17 @@
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#include "../../include/capture/capture.h"
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int gsr_capture_start(gsr_capture *cap) {
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return cap->start(cap);
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}
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void gsr_capture_stop(gsr_capture *cap) {
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cap->stop(cap);
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}
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int gsr_capture_capture(gsr_capture *cap, AVFrame *frame) {
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return cap->capture(cap, frame);
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}
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void gsr_capture_destroy(gsr_capture *cap) {
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cap->destroy(cap);
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}
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332
src/capture/nvfbc.c
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332
src/capture/nvfbc.c
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@@ -0,0 +1,332 @@
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#include "../../include/capture/nvfbc.h"
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#include "../../external/NvFBC.h"
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#include <dlfcn.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <libavutil/frame.h>
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typedef struct {
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gsr_capture_nvfbc_params params;
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void *library;
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NVFBC_SESSION_HANDLE nv_fbc_handle;
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PNVFBCCREATEINSTANCE nv_fbc_create_instance;
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NVFBC_API_FUNCTION_LIST nv_fbc_function_list;
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bool fbc_handle_created;
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} gsr_capture_nvfbc;
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#if defined(_WIN64) || defined(__LP64__)
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typedef unsigned long long CUdeviceptr_v2;
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#else
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typedef unsigned int CUdeviceptr_v2;
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#endif
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typedef CUdeviceptr_v2 CUdeviceptr;
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static int max_int(int a, int b) {
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return a > b ? a : b;
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}
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/* Returns 0 on failure */
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static uint32_t get_output_id_from_display_name(NVFBC_RANDR_OUTPUT_INFO *outputs, uint32_t num_outputs, const char *display_name) {
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if(!outputs)
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return 0;
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for(uint32_t i = 0; i < num_outputs; ++i) {
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if(strcmp(outputs[i].name, display_name) == 0)
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return outputs[i].dwId;
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}
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return 0;
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}
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/* TODO: Test with optimus and open kernel modules */
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static bool driver_supports_direct_capture_cursor() {
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FILE *f = fopen("/proc/driver/nvidia/version", "rb");
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if(!f)
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return false;
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char buffer[2048];
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size_t bytes_read = fread(buffer, 1, sizeof(buffer) - 1, f);
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buffer[bytes_read] = '\0';
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bool supports_cursor = false;
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const char *p = strstr(buffer, "Kernel Module");
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if(p) {
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p += 13;
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int driver_major_version = 0, driver_minor_version = 0;
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if(sscanf(p, "%d.%d", &driver_major_version, &driver_minor_version) == 2) {
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if(driver_major_version > 515 || (driver_major_version == 515 && driver_minor_version >= 57))
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supports_cursor = true;
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}
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}
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fclose(f);
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return supports_cursor;
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}
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static bool gsr_capture_nvfbc_load_library(gsr_capture *cap) {
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gsr_capture_nvfbc *cap_nvfbc = cap->priv;
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dlerror(); /* clear */
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void *lib = dlopen("libnvidia-fbc.so.1", RTLD_LAZY);
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if(!lib) {
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fprintf(stderr, "gsr error: failed to load libnvidia-fbc.so.1, error: %s\n", dlerror());
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return false;
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}
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cap_nvfbc->nv_fbc_create_instance = (PNVFBCCREATEINSTANCE)dlsym(lib, "NvFBCCreateInstance");
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if(!cap_nvfbc->nv_fbc_create_instance) {
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fprintf(stderr, "gsr error: unable to resolve symbol 'NvFBCCreateInstance'\n");
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dlclose(lib);
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return false;
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}
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memset(&cap_nvfbc->nv_fbc_function_list, 0, sizeof(cap_nvfbc->nv_fbc_function_list));
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cap_nvfbc->nv_fbc_function_list.dwVersion = NVFBC_VERSION;
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NVFBCSTATUS status = cap_nvfbc->nv_fbc_create_instance(&cap_nvfbc->nv_fbc_function_list);
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if(status != NVFBC_SUCCESS) {
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fprintf(stderr, "gsr error: failed to create NvFBC instance (status: %d)\n", status);
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dlclose(lib);
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return false;
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}
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cap_nvfbc->library = lib;
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return true;
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}
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static int gsr_capture_nvfbc_start(gsr_capture *cap) {
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gsr_capture_nvfbc *cap_nvfbc = cap->priv;
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const uint32_t x = max_int(cap_nvfbc->params.pos.x, 0);
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const uint32_t y = max_int(cap_nvfbc->params.pos.y, 0);
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const uint32_t width = max_int(cap_nvfbc->params.size.x, 0);
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const uint32_t height = max_int(cap_nvfbc->params.size.y, 0);
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if(!cap_nvfbc->library || !cap_nvfbc->params.display_to_capture || cap_nvfbc->fbc_handle_created)
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return -1;
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const bool capture_region = (x > 0 || y > 0 || width > 0 || height > 0);
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NVFBCSTATUS status;
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NVFBC_TRACKING_TYPE tracking_type;
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bool capture_session_created = false;
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uint32_t output_id = 0;
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cap_nvfbc->fbc_handle_created = false;
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NVFBC_CREATE_HANDLE_PARAMS create_params;
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memset(&create_params, 0, sizeof(create_params));
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create_params.dwVersion = NVFBC_CREATE_HANDLE_PARAMS_VER;
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status = cap_nvfbc->nv_fbc_function_list.nvFBCCreateHandle(&cap_nvfbc->nv_fbc_handle, &create_params);
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if(status != NVFBC_SUCCESS) {
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// Reverse engineering for interoperability
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const uint8_t enable_key[] = { 0xac, 0x10, 0xc9, 0x2e, 0xa5, 0xe6, 0x87, 0x4f, 0x8f, 0x4b, 0xf4, 0x61, 0xf8, 0x56, 0x27, 0xe9 };
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create_params.privateData = enable_key;
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create_params.privateDataSize = 16;
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status = cap_nvfbc->nv_fbc_function_list.nvFBCCreateHandle(&cap_nvfbc->nv_fbc_handle, &create_params);
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if(status != NVFBC_SUCCESS) {
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fprintf(stderr, "gsr error: gsr_capture_nvfbc_start failed: %s\n", cap_nvfbc->nv_fbc_function_list.nvFBCGetLastErrorStr(cap_nvfbc->nv_fbc_handle));
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return -1;
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}
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}
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cap_nvfbc->fbc_handle_created = true;
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NVFBC_GET_STATUS_PARAMS status_params;
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memset(&status_params, 0, sizeof(status_params));
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status_params.dwVersion = NVFBC_GET_STATUS_PARAMS_VER;
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status = cap_nvfbc->nv_fbc_function_list.nvFBCGetStatus(cap_nvfbc->nv_fbc_handle, &status_params);
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if(status != NVFBC_SUCCESS) {
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fprintf(stderr, "gsr error: gsr_capture_nvfbc_start failed: %s\n", cap_nvfbc->nv_fbc_function_list.nvFBCGetLastErrorStr(cap_nvfbc->nv_fbc_handle));
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goto error_cleanup;
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}
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if(status_params.bCanCreateNow == NVFBC_FALSE) {
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fprintf(stderr, "gsr error: gsr_capture_nvfbc_start failed: it's not possible to create a capture session on this system\n");
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goto error_cleanup;
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}
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tracking_type = strcmp(cap_nvfbc->params.display_to_capture, "screen") == 0 ? NVFBC_TRACKING_SCREEN : NVFBC_TRACKING_OUTPUT;
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if(tracking_type == NVFBC_TRACKING_OUTPUT) {
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if(!status_params.bXRandRAvailable) {
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fprintf(stderr, "gsr error: gsr_capture_nvfbc_start failed: the xrandr extension is not available\n");
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goto error_cleanup;
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}
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if(status_params.bInModeset) {
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fprintf(stderr, "gsr error: gsr_capture_nvfbc_start failed: the x server is in modeset, unable to record\n");
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goto error_cleanup;
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}
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output_id = get_output_id_from_display_name(status_params.outputs, status_params.dwOutputNum, cap_nvfbc->params.display_to_capture);
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if(output_id == 0) {
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fprintf(stderr, "gsr error: gsr_capture_nvfbc_start failed: display '%s' not found\n", cap_nvfbc->params.display_to_capture);
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goto error_cleanup;
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}
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}
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NVFBC_CREATE_CAPTURE_SESSION_PARAMS create_capture_params;
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memset(&create_capture_params, 0, sizeof(create_capture_params));
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create_capture_params.dwVersion = NVFBC_CREATE_CAPTURE_SESSION_PARAMS_VER;
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create_capture_params.eCaptureType = NVFBC_CAPTURE_SHARED_CUDA;
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create_capture_params.bWithCursor = (!cap_nvfbc->params.direct_capture || driver_supports_direct_capture_cursor()) ? NVFBC_TRUE : NVFBC_FALSE;
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if(capture_region)
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create_capture_params.captureBox = (NVFBC_BOX){ x, y, width, height };
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create_capture_params.eTrackingType = tracking_type;
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create_capture_params.dwSamplingRateMs = 1000u / (uint32_t)cap_nvfbc->params.fps;
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create_capture_params.bAllowDirectCapture = cap_nvfbc->params.direct_capture ? NVFBC_TRUE : NVFBC_FALSE;
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create_capture_params.bPushModel = cap_nvfbc->params.direct_capture ? NVFBC_TRUE : NVFBC_FALSE;
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if(tracking_type == NVFBC_TRACKING_OUTPUT)
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create_capture_params.dwOutputId = output_id;
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status = cap_nvfbc->nv_fbc_function_list.nvFBCCreateCaptureSession(cap_nvfbc->nv_fbc_handle, &create_capture_params);
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if(status != NVFBC_SUCCESS) {
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fprintf(stderr, "gsr error: gsr_capture_nvfbc_start failed: %s\n", cap_nvfbc->nv_fbc_function_list.nvFBCGetLastErrorStr(cap_nvfbc->nv_fbc_handle));
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goto error_cleanup;
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}
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capture_session_created = true;
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NVFBC_TOCUDA_SETUP_PARAMS setup_params;
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memset(&setup_params, 0, sizeof(setup_params));
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setup_params.dwVersion = NVFBC_TOCUDA_SETUP_PARAMS_VER;
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setup_params.eBufferFormat = NVFBC_BUFFER_FORMAT_BGRA;
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status = cap_nvfbc->nv_fbc_function_list.nvFBCToCudaSetUp(cap_nvfbc->nv_fbc_handle, &setup_params);
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if(status != NVFBC_SUCCESS) {
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fprintf(stderr, "gsr error: gsr_capture_nvfbc_start failed: %s\n", cap_nvfbc->nv_fbc_function_list.nvFBCGetLastErrorStr(cap_nvfbc->nv_fbc_handle));
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goto error_cleanup;
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}
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return 0;
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error_cleanup:
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if(cap_nvfbc->fbc_handle_created) {
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if(capture_session_created) {
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NVFBC_DESTROY_CAPTURE_SESSION_PARAMS destroy_capture_params;
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memset(&destroy_capture_params, 0, sizeof(destroy_capture_params));
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destroy_capture_params.dwVersion = NVFBC_DESTROY_CAPTURE_SESSION_PARAMS_VER;
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cap_nvfbc->nv_fbc_function_list.nvFBCDestroyCaptureSession(cap_nvfbc->nv_fbc_handle, &destroy_capture_params);
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}
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NVFBC_DESTROY_HANDLE_PARAMS destroy_params;
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memset(&destroy_params, 0, sizeof(destroy_params));
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destroy_params.dwVersion = NVFBC_DESTROY_HANDLE_PARAMS_VER;
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cap_nvfbc->nv_fbc_function_list.nvFBCDestroyHandle(cap_nvfbc->nv_fbc_handle, &destroy_params);
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cap_nvfbc->fbc_handle_created = false;
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}
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output_id = 0;
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return -1;
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}
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static void gsr_capture_nvfbc_stop(gsr_capture *cap) {
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gsr_capture_nvfbc *cap_nvfbc = cap->priv;
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/* Intentionally ignore failure on destroy */
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if(!cap_nvfbc->nv_fbc_handle)
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return;
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NVFBC_DESTROY_CAPTURE_SESSION_PARAMS destroy_capture_params;
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memset(&destroy_capture_params, 0, sizeof(destroy_capture_params));
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destroy_capture_params.dwVersion = NVFBC_DESTROY_CAPTURE_SESSION_PARAMS_VER;
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cap_nvfbc->nv_fbc_function_list.nvFBCDestroyCaptureSession(cap_nvfbc->nv_fbc_handle, &destroy_capture_params);
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NVFBC_DESTROY_HANDLE_PARAMS destroy_params;
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memset(&destroy_params, 0, sizeof(destroy_params));
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destroy_params.dwVersion = NVFBC_DESTROY_HANDLE_PARAMS_VER;
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cap_nvfbc->nv_fbc_function_list.nvFBCDestroyHandle(cap_nvfbc->nv_fbc_handle, &destroy_params);
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cap_nvfbc->nv_fbc_handle = 0;
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}
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static int gsr_capture_nvfbc_capture(gsr_capture *cap, AVFrame *frame) {
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gsr_capture_nvfbc *cap_nvfbc = cap->priv;
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if(!cap_nvfbc->library || !cap_nvfbc->fbc_handle_created)
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return -1;
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CUdeviceptr cu_device_ptr = 0;
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NVFBC_FRAME_GRAB_INFO frame_info;
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memset(&frame_info, 0, sizeof(frame_info));
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NVFBC_TOCUDA_GRAB_FRAME_PARAMS grab_params;
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memset(&grab_params, 0, sizeof(grab_params));
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grab_params.dwVersion = NVFBC_TOCUDA_GRAB_FRAME_PARAMS_VER;
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grab_params.dwFlags = NVFBC_TOCUDA_GRAB_FLAGS_NOWAIT;/* | NVFBC_TOCUDA_GRAB_FLAGS_FORCE_REFRESH;*/
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grab_params.pFrameGrabInfo = &frame_info;
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grab_params.pCUDADeviceBuffer = &cu_device_ptr;
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NVFBCSTATUS status = cap_nvfbc->nv_fbc_function_list.nvFBCToCudaGrabFrame(cap_nvfbc->nv_fbc_handle, &grab_params);
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if(status != NVFBC_SUCCESS) {
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fprintf(stderr, "gsr error: gsr_capture_nvfbc_capture failed: %s\n", cap_nvfbc->nv_fbc_function_list.nvFBCGetLastErrorStr(cap_nvfbc->nv_fbc_handle));
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return -1;
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}
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/*
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*byte_size = frame_info.dwByteSize;
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TODO: Check bIsNewFrame
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TODO: Check dwWidth and dwHeight and update size in video output in ffmpeg. This can happen when xrandr is used to change monitor resolution
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*/
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frame->data[0] = (uint8_t*)cu_device_ptr;
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frame->linesize[0] = frame->width * 4;
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return 0;
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}
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static void gsr_capture_nvfbc_destroy(gsr_capture *cap) {
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if(cap) {
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gsr_capture_nvfbc *cap_nvfbc = cap->priv;
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gsr_capture_nvfbc_stop(cap);
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if(cap_nvfbc) {
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dlclose(cap_nvfbc->library);
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free((void*)cap_nvfbc->params.display_to_capture);
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free(cap->priv);
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cap->priv = NULL;
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}
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free(cap);
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}
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}
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gsr_capture* gsr_capture_nvfbc_create(const gsr_capture_nvfbc_params *params) {
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if(!params) {
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fprintf(stderr, "gsr error: gsr_capture_nvfbc_create params is NULL\n");
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return NULL;
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}
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gsr_capture *cap = calloc(1, sizeof(gsr_capture));
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if(!cap)
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return NULL;
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gsr_capture_nvfbc *cap_nvfbc = calloc(1, sizeof(gsr_capture_nvfbc));
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if(!cap_nvfbc) {
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free(cap);
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return NULL;
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}
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const char *display_to_capture = strdup(params->display_to_capture);
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if(!display_to_capture) {
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free(cap);
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free(cap_nvfbc);
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return NULL;
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}
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cap_nvfbc->params = *params;
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cap_nvfbc->params.display_to_capture = display_to_capture;
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cap_nvfbc->params.fps = max_int(cap_nvfbc->params.fps, 1);
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*cap = (gsr_capture) {
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.start = gsr_capture_nvfbc_start,
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.stop = gsr_capture_nvfbc_stop,
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.capture = gsr_capture_nvfbc_capture,
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.destroy = gsr_capture_nvfbc_destroy,
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.priv = cap_nvfbc
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};
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if(!gsr_capture_nvfbc_load_library(cap)) {
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gsr_capture_nvfbc_destroy(cap);
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return NULL;
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}
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return cap;
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}
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