PapaTutuWawa/gpu-screen-recorder
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Use select on x11 display instead of sleeping and use xdamage again

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This commit is contained in:
dec05eba 2020-08-31 01:21:11 +02:00
parent e80bab33ca
commit 008f119f4c
2 changed files with 55 additions and 21 deletions
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2
project.conf
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@ -18,7 +18,7 @@ libavformat = ">=58"
libavutil = ">=56.2"
x11 = ">=1"
xcomposite = ">=0.2"
#xdamage = "1"
xdamage = "1"
# TODO: Remove this dependency, this is needed right now for glfwMakeContextCurrent
glfw3 = "3"

74
src/main.cpp
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@ -37,6 +37,7 @@
#include <GLFW/glfw3.h>
#include <X11/extensions/Xcomposite.h>
#include <X11/extensions/Xdamage.h>
extern "C" {
#include <libavcodec/avcodec.h>
@ -839,6 +840,16 @@ int main(int argc, char **argv) {
XSelectInput(dpy, src_window_id, StructureNotifyMask);
int damage_event;
int damage_error;
if (!XDamageQueryExtension(dpy, &damage_event, &damage_error)) {
fprintf(stderr, "Error: XDamage is not supported by your X11 server\n");
return 1;
}
Damage damage = XDamageCreate(dpy, src_window_id, XDamageReportNonEmpty);
XDamageSubtract(dpy, damage,None,None);
int frame_count = 0;
CUresult res;
@ -975,25 +986,56 @@ int main(int argc, char **argv) {
}, av_format_context, audio_stream, audio_frame_buf, &sound_device, audio_frame, &write_output_mutex);
}
int x11_fd = ConnectionNumber(dpy);
fd_set in_fds;
struct timeval tv;
bool redraw = true;
XEvent e;
while (running) {
double frame_start = glfwGetTime();
/*glClear(GL_COLOR_BUFFER_BIT);*/
glfwPollEvents();
if (XCheckTypedWindowEvent(dpy, src_window_id, ConfigureNotify, &e) && e.xconfigure.window == src_window_id) {
// Window resize
if(e.xconfigure.width != window_width || e.xconfigure.height != window_height) {
window_width = e.xconfigure.width;
window_height = e.xconfigure.height;
window_resize_timer = glfwGetTime();
window_resized = true;
}
FD_ZERO(&in_fds);
FD_SET(x11_fd, &in_fds);
/* Wake up thread every frame even if no events are received */
tv.tv_usec = 1000 * (1000.0 / (double)fps);
tv.tv_sec = 0;
int num_ready_fds = select(x11_fd + 1, &in_fds, NULL, NULL, &tv);
if (num_ready_fds < 0) {
//fprintf(stderr, "Window manager error: select failed on display file descriptor!\n");
continue;
}
redraw = true;
/*glClear(GL_COLOR_BUFFER_BIT);*/
while(num_ready_fds > 0 && XPending(dpy)) {
XNextEvent(dpy, &e);
if (e.type == ConfigureNotify && e.xconfigure.window == src_window_id) {
// Window resize
if(e.xconfigure.width != window_width || e.xconfigure.height != window_height) {
window_width = e.xconfigure.width;
window_height = e.xconfigure.height;
window_resize_timer = glfwGetTime();
window_resized = true;
}
}
if (e.type == damage_event + XDamageNotify) {
// fprintf(stderr, "Redraw!\n");
XDamageNotifyEvent *de = (XDamageNotifyEvent *)&e;
// de->drawable is the window ID of the damaged window
XserverRegion region = XFixesCreateRegion(dpy, nullptr, 0);
// Subtract all the damage, repairing the window
XDamageSubtract(dpy, de->damage, None, region);
XFixesDestroyRegion(dpy, region);
++fps_counter;
redraw = true;
}
}
const double window_resize_timeout = 1.0; // 1 second
if(window_resized && glfwGetTime() - window_resize_timer >= window_resize_timeout) {
@ -1030,8 +1072,6 @@ 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;
@ -1087,12 +1127,6 @@ int main(int argc, char **argv) {
}
// av_frame_free(&frame);
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 = 0;