Remove time_rate, we cannot compute exactly when fragments are

used and we cannot determine if fragments are present or not in
streamed mode.

Originally committed as revision 19148 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/isom.h

@@ -106,7 +106,6 @@ typedef struct MOVStreamContext {
     unsigned int keyframe_count;
     int *keyframes;
     int time_scale;
-    int time_rate;
     int time_offset;      ///< time offset of the first edit list entry
     int current_sample;
     unsigned int bytes_per_frame;

libavformat/mov.c

@@ -1253,8 +1253,6 @@ static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
         sc->stts_data[i].count= sample_count;
         sc->stts_data[i].duration= sample_duration;
 
-        sc->time_rate= av_gcd(sc->time_rate, sample_duration);
-
         dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
 
         duration+=(int64_t)sample_duration*sample_count;
@@ -1282,8 +1280,6 @@ static int mov_read_cslg(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
     sc->dts_shift = get_be32(pb);
     dprintf(c->fc, "dts shift %d\n", sc->dts_shift);
 
-    sc->time_rate= av_gcd(sc->time_rate, FFABS(sc->dts_shift));
-
     get_be32(pb); // least dts to pts delta
     get_be32(pb); // greatest dts to pts delta
     get_be32(pb); // pts start
@@ -1317,8 +1313,6 @@ static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 
         sc->ctts_data[i].count   = count;
         sc->ctts_data[i].duration= duration;
-
-        sc->time_rate= av_gcd(sc->time_rate, FFABS(duration));
     }
     return 0;
 }
@@ -1337,8 +1331,7 @@ static void mov_build_index(MOVContext *mov, AVStream *st)
     /* adjust first dts according to edit list */
     if (sc->time_offset) {
         int rescaled = sc->time_offset < 0 ? av_rescale(sc->time_offset, sc->time_scale, mov->time_scale) : sc->time_offset;
-        assert(sc->time_offset % sc->time_rate == 0);
-        current_dts = - (rescaled / sc->time_rate);
+        current_dts = -rescaled;
         if (sc->ctts_data && sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
             /* more than 16 frames delay, dts are likely wrong
                this happens with files created by iMovie */
@@ -1356,7 +1349,6 @@ static void mov_build_index(MOVContext *mov, AVStream *st)
         unsigned int distance = 0;
         int key_off = sc->keyframes && sc->keyframes[0] == 1;
 
-        sc->dts_shift /= sc->time_rate;
         current_dts -= sc->dts_shift;
 
         st->nb_frames = sc->sample_count;
@@ -1394,8 +1386,7 @@ static void mov_build_index(MOVContext *mov, AVStream *st)
                 }
 
                 current_offset += sample_size;
-                assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
-                current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
+                current_dts += sc->stts_data[stts_index].duration;
                 distance++;
                 stts_sample++;
                 current_sample++;
@@ -1443,8 +1434,7 @@ static void mov_build_index(MOVContext *mov, AVStream *st)
                         size, samples);
 
                 current_offset += size;
-                assert(samples % sc->time_rate == 0);
-                current_dts += samples / sc->time_rate;
+                current_dts += samples;
                 chunk_samples -= samples;
             }
         }
@@ -1477,12 +1467,10 @@ static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
         return 0;
     }
 
-    if (!sc->time_rate)
-        sc->time_rate = 1;
     if (!sc->time_scale)
         sc->time_scale = c->time_scale;
 
-    av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
+    av_set_pts_info(st, 64, 1, sc->time_scale);
 
     if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
         !st->codec->frame_size && sc->stts_count == 1) {
@@ -1491,11 +1479,6 @@ static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
         dprintf(c->fc, "frame size %d\n", st->codec->frame_size);
     }
 
-    if (st->duration != AV_NOPTS_VALUE) {
-        assert(st->duration % sc->time_rate == 0);
-        st->duration /= sc->time_rate;
-    }
-
     mov_build_index(c, st);
 
     if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
@@ -1754,8 +1737,7 @@ static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
                 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
                 offset, dts, sample_size, distance, keyframe);
         distance++;
-        assert(sample_duration % sc->time_rate == 0);
-        dts += sample_duration / sc->time_rate;
+        dts += sample_duration;
         offset += sample_size;
     }
     frag->moof_offset = offset;
@@ -1856,7 +1838,6 @@ static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
         get_be32(pb); /* Media rate */
         if (i == 0 && time >= -1) {
             sc->time_offset = time != -1 ? time : -duration;
-            sc->time_rate = av_gcd(sc->time_rate, FFABS(sc->time_offset));
         }
     }
 
@@ -2006,8 +1987,7 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
         MOVStreamContext *msc = st->priv_data;
         if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < st->nb_index_entries) {
             AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
-            int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
-                                     AV_TIME_BASE, msc->time_scale);
+            int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
             dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
             if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
                 (!url_is_streamed(s->pb) &&
@@ -2051,8 +2031,7 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
     pkt->stream_index = sc->ffindex;
     pkt->dts = sample->timestamp;
     if (sc->ctts_data) {
-        assert(sc->ctts_data[sc->ctts_index].duration % sc->time_rate == 0);
-        pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration / sc->time_rate;
+        pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
         /* update ctts context */
         sc->ctts_sample++;
         if (sc->ctts_index < sc->ctts_count &&