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ffplay: use videoq.serial to detect obsolete frames 

Previously VideoPicture->skip was used for that, using videoq.serial enables us
to detect obsolete frames right after pushing flush_pkt to the packet queue, so
we don't have to wait for the decoder thread to pop the flush packet anymore.

This is good because until now a full video picture queue may have blocked the
decoder thread.

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2013-01-02 01:00:12 +01:00
parent d00df260ca
commit 1427c6842d
1 changed files with 3 additions and 8 deletions
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11
ffplay.c
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@ -116,7 +116,6 @@ typedef struct PacketQueue {
typedef struct VideoPicture {
double pts; // presentation timestamp for this picture
int64_t pos; // byte position in file
int skip;
SDL_Overlay *bmp;
int width, height; /* source height & width */
AVRational sample_aspect_ratio;
@ -1261,7 +1260,7 @@ static void pictq_prev_picture(VideoState *is) {
VideoPicture *prevvp;
/* 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->skip) {
if (prevvp->allocated && prevvp->serial == is->videoq.serial) {
SDL_LockMutex(is->pictq_mutex);
if (is->pictq_size < VIDEO_PICTURE_QUEUE_SIZE - 1) {
if (--is->pictq_rindex == -1)
@ -1316,7 +1315,7 @@ retry:
/* dequeue the picture */
vp = &is->pictq[is->pictq_rindex];
if (vp->skip) {
if (vp->serial != is->videoq.serial) {
pictq_next_picture(is);
goto retry;
}
@ -1619,7 +1618,6 @@ static int queue_picture(VideoState *is, AVFrame *src_frame, double pts1, int64_
vp->pts = pts;
vp->pos = pos;
vp->skip = 0;
vp->serial = serial;
/* now we can update the picture count */
@ -1634,7 +1632,7 @@ static int queue_picture(VideoState *is, AVFrame *src_frame, double pts1, int64_
static int get_video_frame(VideoState *is, AVFrame *frame, int64_t *pts, AVPacket *pkt, int *serial)
{
int got_picture, i;
int got_picture;
if (packet_queue_get(&is->videoq, pkt, 1, serial) < 0)
return -1;
@ -1644,9 +1642,6 @@ static int get_video_frame(VideoState *is, AVFrame *frame, int64_t *pts, AVPacke
SDL_LockMutex(is->pictq_mutex);
// Make sure there are no long delay timers (ideally we should just flush the queue but that's harder)
for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++) {
is->pictq[i].skip = 1;
}
while (is->pictq_size && !is->videoq.abort_request) {
SDL_CondWait(is->pictq_cond, is->pictq_mutex);
}