Merge commit 'c74f81786d434dfaf9b3dff06aa96bfd23d0127b'

[ffmpeg] / ffplay.c

diff --git a/ffplay.c b/ffplay.c
index e3b156a4f28fb575cc867478982a0a04d20ef3f6..842939a777584f44e41ee883932f2d70a849f57e 100644 (file)
--- a/ffplay.c
+++ b/ffplay.c
@@ -78,6 +78,11 @@ const int program_birth_year = 2003;
 /* maximum audio speed change to get correct sync */
 #define SAMPLE_CORRECTION_PERCENT_MAX 10
 
+/* external clock speed adjustment constants for realtime sources based on buffer fullness */
+#define EXTERNAL_CLOCK_SPEED_MIN  0.900
+#define EXTERNAL_CLOCK_SPEED_MAX  1.010
+#define EXTERNAL_CLOCK_SPEED_STEP 0.001
+
 /* we use about AUDIO_DIFF_AVG_NB A-V differences to make the average */
 #define AUDIO_DIFF_AVG_NB   20
 
@@ -157,6 +162,7 @@ typedef struct VideoState {
     int64_t seek_rel;
     int read_pause_return;
     AVFormatContext *ic;
+    int realtime;
 
     int audio_stream;
 
@@ -164,6 +170,7 @@ typedef struct VideoState {
     double external_clock;                   ///< external clock base
     double external_clock_drift;             ///< external clock base - time (av_gettime) at which we updated external_clock
     int64_t external_clock_time;             ///< last reference time
+    double external_clock_speed;             ///< speed of the external clock
 
     double audio_clock;
     double audio_diff_cum; /* used for AV difference average computation */
@@ -227,6 +234,7 @@ typedef struct VideoState {
     double video_current_pts;       // current displayed pts (different from video_clock if frame fifos are used)
     double video_current_pts_drift; // video_current_pts - time (av_gettime) at which we updated video_current_pts - used to have running video pts
     int64_t video_current_pos;      // current displayed file pos
+    double max_frame_duration;      // maximum duration of a frame - above this, we consider the jump a timestamp discontinuity
     VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
     int pictq_size, pictq_rindex, pictq_windex;
     SDL_mutex *pictq_mutex;
@@ -1107,7 +1115,8 @@ static double get_external_clock(VideoState *is)
     if (is->paused) {
         return is->external_clock;
     } else {
-        return is->external_clock_drift + av_gettime() / 1000000.0;
+        double time = av_gettime() / 1000000.0;
+        return is->external_clock_drift + time - (time - is->external_clock_time / 1000000.0) * (1.0 - is->external_clock_speed);
     }
 }
 
@@ -1159,6 +1168,25 @@ static void check_external_clock_sync(VideoState *is, double pts) {
     }
 }
 
+static void update_external_clock_speed(VideoState *is, double speed) {
+    update_external_clock_pts(is, get_external_clock(is));
+    is->external_clock_speed = speed;
+}
+
+static void check_external_clock_speed(VideoState *is) {
+   if (is->video_stream >= 0 && is->videoq.nb_packets <= MIN_FRAMES / 2 ||
+       is->audio_stream >= 0 && is->audioq.nb_packets <= MIN_FRAMES / 2) {
+       update_external_clock_speed(is, FFMAX(EXTERNAL_CLOCK_SPEED_MIN, is->external_clock_speed - EXTERNAL_CLOCK_SPEED_STEP));
+   } else if ((is->video_stream < 0 || is->videoq.nb_packets > MIN_FRAMES * 2) &&
+              (is->audio_stream < 0 || is->audioq.nb_packets > MIN_FRAMES * 2)) {
+       update_external_clock_speed(is, FFMIN(EXTERNAL_CLOCK_SPEED_MAX, is->external_clock_speed + EXTERNAL_CLOCK_SPEED_STEP));
+   } else {
+       double speed = is->external_clock_speed;
+       if (speed != 1.0)
+           update_external_clock_speed(is, speed + EXTERNAL_CLOCK_SPEED_STEP * (1.0 - speed) / fabs(1.0 - speed));
+   }
+}
+
 /* seek in the stream */
 static void stream_seek(VideoState *is, int64_t pos, int64_t rel, int seek_by_bytes)
 {
@@ -1261,6 +1289,9 @@ static void video_refresh(void *opaque)
 
     SubPicture *sp, *sp2;
 
+    if (!is->paused && get_master_sync_type(is) == AV_SYNC_EXTERNAL_CLOCK && is->realtime)
+        check_external_clock_speed(is);
+
     if (is->video_st) {
         if (is->force_refresh)
             pictq_prev_picture(is);
@@ -1288,7 +1319,7 @@ retry:
 
             /* compute nominal last_duration */
             last_duration = vp->pts - is->frame_last_pts;
-            if (last_duration > 0 && last_duration < 10.0) {
+            if (last_duration > 0 && last_duration < is->max_frame_duration) {
                 /* if duration of the last frame was sane, update last_duration in video state */
                 is->frame_last_duration = last_duration;
             }
@@ -2527,6 +2558,8 @@ static int read_thread(void *arg)
     if (seek_by_bytes < 0)
         seek_by_bytes = !!(ic->iformat->flags & AVFMT_TS_DISCONT);
 
+    is->max_frame_duration = (ic->iformat->flags & AVFMT_TS_DISCONT) ? 10.0 : 3600.0;
+
     /* if seeking requested, we execute it */
     if (start_time != AV_NOPTS_VALUE) {
         int64_t timestamp;
@@ -2542,6 +2575,8 @@ static int read_thread(void *arg)
         }
     }
 
+    is->realtime = is_realtime(ic);
+
     for (i = 0; i < ic->nb_streams; i++)
         ic->streams[i]->discard = AVDISCARD_ALL;
     if (!video_disable)
@@ -2591,7 +2626,7 @@ static int read_thread(void *arg)
         goto fail;
     }
 
-    if (infinite_buffer < 0 && is_realtime(ic))
+    if (infinite_buffer < 0 && is->realtime)
         infinite_buffer = 1;
 
     for (;;) {
@@ -2637,8 +2672,13 @@ static int read_thread(void *arg)
                     packet_queue_flush(&is->videoq);
                     packet_queue_put(&is->videoq, &flush_pkt);
                 }
+                if (is->seek_flags & AVSEEK_FLAG_BYTE) {
+                   //FIXME: use a cleaner way to signal obsolete external clock...
+                   update_external_clock_pts(is, (double)AV_NOPTS_VALUE);
+                } else {
+                   update_external_clock_pts(is, seek_target / (double)AV_TIME_BASE);
+                }
             }
-            update_external_clock_pts(is, (seek_target + ic->start_time) / (double)AV_TIME_BASE);
             is->seek_req = 0;
             eof = 0;
         }
@@ -2769,6 +2809,7 @@ static VideoState *stream_open(const char *filename, AVInputFormat *iformat)
     is->continue_read_thread = SDL_CreateCond();
 
     update_external_clock_pts(is, 0.0);
+    update_external_clock_speed(is, 1.0);
     is->audio_current_pts_drift = -av_gettime() / 1000000.0;
     is->video_current_pts_drift = is->audio_current_pts_drift;
     is->av_sync_type = av_sync_type;
@@ -2951,6 +2992,8 @@ static void event_loop(VideoState *cur_stream)
                     } else {
                         pos = get_master_clock(cur_stream);
                         pos += incr;
+                        if (cur_stream->ic->start_time != AV_NOPTS_VALUE && pos < cur_stream->ic->start_time / (double)AV_TIME_BASE)
+                            pos = cur_stream->ic->start_time / (double)AV_TIME_BASE;
                         stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);
                     }
                 break;