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fix(video): alternate read for double buffering

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klemek
2025-11-24 19:11:59 +01:00
parent c66a5c166e
commit 97f768f65e
1 changed files with 5 additions and 4 deletions
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src/video.c
+5 -4
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@@ -286,16 +286,17 @@ static void close_stream(const VideoCapture *video_capture) {
ioctl(video_capture->fd, VIDIOC_STREAMOFF, &buf_type); ioctl(video_capture->fd, VIDIOC_STREAMOFF, &buf_type);
} }
static unsigned int read_video(const VideoCapture *video_capture) { static unsigned int read_video(const VideoCapture *video_capture, bool swap) {
int result; int result;
result = 0; result = 0;
if (ioctl(video_capture->fd, VIDIOC_DQBUF, &video_capture->buf) != -1) { if ((swap || !video_capture->with_swap) &&
ioctl(video_capture->fd, VIDIOC_DQBUF, &video_capture->buf) != -1) {
ioctl(video_capture->fd, VIDIOC_QBUF, &video_capture->buf); ioctl(video_capture->fd, VIDIOC_QBUF, &video_capture->buf);
result = 1; result = 1;
} else if (video_capture->with_swap && } else if (!swap && video_capture->with_swap &&
ioctl(video_capture->fd, VIDIOC_DQBUF, &video_capture->buf_swap) != ioctl(video_capture->fd, VIDIOC_DQBUF, &video_capture->buf_swap) !=
-1) { -1) {
ioctl(video_capture->fd, VIDIOC_QBUF, &video_capture->buf_swap); ioctl(video_capture->fd, VIDIOC_QBUF, &video_capture->buf_swap);
@@ -361,7 +362,7 @@ bool video_background_read(VideoCapture *video_capture, SharedContext *context,
timer_init(&timer, 30); timer_init(&timer, 30);
while (!context->stop) { while (!context->stop) {
video_result = read_video(video_capture); video_result = read_video(video_capture, context->input_swap[input_index]);
if (video_result > 0 && timer_inc(&timer)) { if (video_result > 0 && timer_inc(&timer)) {
fps = timer_reset(&timer); fps = timer_reset(&timer);