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Fix race condition with reading between video_current_pts and video_current_pts_time.

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Originally committed as revision 21585 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2010-02-01 10:55:51 +00:00
parent f5668147cb
commit 68aefbe81c
1 changed files with 9 additions and 10 deletions
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19
ffplay.c
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@ -168,7 +168,7 @@ typedef struct VideoState {
AVStream *video_st;
PacketQueue videoq;
double video_current_pts; ///<current displayed pts (different from video_clock if frame fifos are used)
int64_t video_current_pts_time; ///<time (av_gettime) at which we updated video_current_pts - used to have running video pts
double video_current_pts_drift; ///<video_current_pts - time (av_gettime) at which we updated video_current_pts - used to have running video pts
VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
int pictq_size, pictq_rindex, pictq_windex;
SDL_mutex *pictq_mutex;
@ -942,7 +942,7 @@ static double get_video_clock(VideoState *is)
if (is->paused) {
return is->video_current_pts;
} else {
return is->video_current_pts + (av_gettime() - is->video_current_pts_time) / 1000000.0;
return is->video_current_pts_drift + av_gettime() / 1000000.0;
}
}
@ -990,15 +990,14 @@ static void stream_seek(VideoState *is, int64_t pos, int64_t rel, int seek_by_by
/* pause or resume the video */
static void stream_pause(VideoState *is)
{
is->paused = !is->paused;
if (!is->paused) {
if (is->paused) {
is->frame_timer += av_gettime() / 1000000.0 + is->video_current_pts_drift - is->video_current_pts;
if(is->read_pause_return != AVERROR(ENOSYS)){
is->video_current_pts = get_video_clock(is);
is->video_current_pts = is->video_current_pts_drift + av_gettime() / 1000000.0;
}
is->frame_timer += (av_gettime() - is->video_current_pts_time) / 1000000.0;
is->video_current_pts_time= av_gettime();
is->video_current_pts_drift = is->video_current_pts - av_gettime() / 1000000.0;
}
is->paused = !is->paused;
}
static double compute_frame_delay(double frame_current_pts, VideoState *is)
@ -1070,7 +1069,7 @@ static void video_refresh_timer(void *opaque)
/* update current video pts */
is->video_current_pts = vp->pts;
is->video_current_pts_time = av_gettime();
is->video_current_pts_drift = is->video_current_pts - av_gettime() / 1000000.0;
/* launch timer for next picture */
schedule_refresh(is, (int)(compute_frame_delay(vp->pts, is) * 1000 + 0.5));
@ -1795,7 +1794,7 @@ static int stream_component_open(VideoState *is, int stream_index)
is->frame_last_delay = 40e-3;
is->frame_timer = (double)av_gettime() / 1000000.0;
is->video_current_pts_time = av_gettime();
// is->video_current_pts_time = av_gettime();
packet_queue_init(&is->videoq);
is->video_tid = SDL_CreateThread(video_thread, is);