PapaTutuWawa/gpu-screen-recorder
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Capture cursor in direct capture mode if supported by the driver (driver version >= 515.57)

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This commit is contained in:
dec05eba 2022-10-03 17:29:13 +02:00
parent 4cd391e07e
commit 270a8636ae
2 changed files with 30 additions and 4 deletions
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2
README.md
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@ -53,6 +53,6 @@ FFMPEG only uses the GPU with CUDA when doing transcoding from an input video to
libraries at compile-time.
* Clean up the code!
* Dynamically change bitrate/resolution to match desired fps. This would be helpful when streaming for example, where the encode output speed also depends on upload speed to the streaming service.
* Show cursor when recording. Currently the cursor is not visible when recording a window and it's disabled when recording screen-direct to allow direct nvfbc capture for fullscreen windows, which allows for better performance and variable refresh rate monitors to work.
* Show cursor when recording. Currently the cursor is not visible when recording a window.
* Implement opengl injection to capture texture. This fixes composition issues and (VRR) without having to use NvFBC direct capture.
* Always use direct capture with NvFBC once the capture issue in mpv fullscreen has been resolved (maybe detect if direct capture fails in nvfbc and switch to non-direct recording. NvFBC says if direct capture fails).

32
include/NvFBCLibrary.hpp
View File

@ -4,6 +4,7 @@
#include <dlfcn.h>
#include <string.h>
#include <stdio.h>
#include <string.h>
class NvFBCLibrary {
public:
@ -55,7 +56,7 @@ public:
return true;
}
// If |display_to_capture| is "screen", then the entire x11 screen is captured (all displays)
// If |display_to_capture| is "screen", then the entire x11 screen is captured (all displays).
bool create(const char *display_to_capture, uint32_t fps, /*out*/ uint32_t *display_width, /*out*/ uint32_t *display_height, uint32_t x = 0, uint32_t y = 0, uint32_t width = 0, uint32_t height = 0, bool direct_capture = false) {
if(!library || !display_to_capture || !display_width || !display_height || fbc_handle_created)
return false;
@ -120,7 +121,7 @@ public:
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_SHARED_CUDA;
create_capture_params.bWithCursor = direct_capture ? NVFBC_FALSE : NVFBC_TRUE;
create_capture_params.bWithCursor = (!direct_capture || driver_supports_direct_capture_cursor()) ? NVFBC_TRUE : NVFBC_FALSE;
if(capture_region) {
create_capture_params.captureBox = { x, y, width, height };
*display_width = width;
@ -221,7 +222,7 @@ private:
}
// Returns 0 on failure
uint32_t get_output_id_from_display_name(NVFBC_RANDR_OUTPUT_INFO *outputs, uint32_t num_outputs, const char *display_name, uint32_t *display_width, uint32_t *display_height) {
static uint32_t get_output_id_from_display_name(NVFBC_RANDR_OUTPUT_INFO *outputs, uint32_t num_outputs, const char *display_name, uint32_t *display_width, uint32_t *display_height) {
if(!outputs)
return 0;
@ -235,6 +236,31 @@ private:
return 0;
}
// TODO: Test with optimus and open kernel modules
static bool driver_supports_direct_capture_cursor() {
FILE *f = fopen("/proc/driver/nvidia/version", "rb");
if(!f)
return false;
char buffer[2048];
size_t bytes_read = fread(buffer, 1, sizeof(buffer) - 1, f);
buffer[bytes_read] = '\0';
bool supports_cursor = 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) {
if(driver_major_version > 515 || (driver_major_version == 515 && driver_minor_version >= 57))
supports_cursor = true;
}
}
fclose(f);
return supports_cursor;
}
private:
void *library = nullptr;
PNVFBCCREATEINSTANCE nv_fbc_create_instance = nullptr;