-static int pictq_prev_picture(VideoState *is) {
- VideoPicture *prevvp;
- int ret = 0;
- /* update queue size and signal for the previous picture */
- prevvp = &is->pictq[(is->pictq_rindex + VIDEO_PICTURE_QUEUE_SIZE - 1) % VIDEO_PICTURE_QUEUE_SIZE];
- if (prevvp->allocated && prevvp->serial == is->videoq.serial) {
- SDL_LockMutex(is->pictq_mutex);
- if (is->pictq_size < VIDEO_PICTURE_QUEUE_SIZE) {
- if (--is->pictq_rindex == -1)
- is->pictq_rindex = VIDEO_PICTURE_QUEUE_SIZE - 1;
- is->pictq_size++;
- ret = 1;
- }
- SDL_CondSignal(is->pictq_cond);
- SDL_UnlockMutex(is->pictq_mutex);
- }
- return ret;
-}
-