lavf/utils: rewrite real fps calculation code.

[ffmpeg] / libavformat / oggdec.c

diff --git a/libavformat/oggdec.c b/libavformat/oggdec.c
index 597ea3bd805be4a0070d97980e47106c7daed522..62dab851fc1db5f6af2e53d564b1deaff4a2cfad 100644 (file)
--- a/libavformat/oggdec.c
+++ b/libavformat/oggdec.c
@@ -29,7 +29,6 @@
     DEALINGS IN THE SOFTWARE.
 **/
 
-
 #include <stdio.h>
 #include "oggdec.h"
 #include "avformat.h"
@@ -93,14 +92,24 @@ static int ogg_restore(AVFormatContext *s, int discard)
     ogg->state = ost->next;
 
     if (!discard){
+        struct ogg_stream *old_streams = ogg->streams;
+
         for (i = 0; i < ogg->nstreams; i++)
             av_free (ogg->streams[i].buf);
 
         avio_seek (bc, ost->pos, SEEK_SET);
         ogg->curidx = ost->curidx;
         ogg->nstreams = ost->nstreams;
-        memcpy(ogg->streams, ost->streams,
-               ost->nstreams * sizeof(*ogg->streams));
+        ogg->streams = av_realloc (ogg->streams,
+                                   ogg->nstreams * sizeof (*ogg->streams));
+
+        if (ogg->streams) {
+            memcpy(ogg->streams, ost->streams,
+                   ost->nstreams * sizeof(*ogg->streams));
+        } else {
+            av_free(old_streams);
+            ogg->nstreams = 0;
+        }
     }
 
     av_free (ost);
@@ -452,6 +461,7 @@ static int ogg_get_length(AVFormatContext *s)
     struct ogg *ogg = s->priv_data;
     int i;
     int64_t size, end;
+    int streams_left=0;
 
     if(!s->pb->seekable)
         return 0;
@@ -473,8 +483,14 @@ static int ogg_get_length(AVFormatContext *s)
             ogg->streams[i].codec) {
             s->streams[i]->duration =
                 ogg_gptopts (s, i, ogg->streams[i].granule, NULL);
-            if (s->streams[i]->start_time != AV_NOPTS_VALUE)
+            if (s->streams[i]->start_time != AV_NOPTS_VALUE){
                 s->streams[i]->duration -= s->streams[i]->start_time;
+                streams_left-= (ogg->streams[i].got_start==-1);
+                ogg->streams[i].got_start= 1;
+            }else if(!ogg->streams[i].got_start){
+                ogg->streams[i].got_start= -1;
+                streams_left++;
+            }
         }
     }
 
@@ -485,9 +501,15 @@ static int ogg_get_length(AVFormatContext *s)
     while (!ogg_read_page (s, &i)){
         if (ogg->streams[i].granule != -1 && ogg->streams[i].granule != 0 &&
             ogg->streams[i].codec) {
-            s->streams[i]->duration -=
-                ogg_gptopts (s, i, ogg->streams[i].granule, NULL);
-            break;
+            if(s->streams[i]->duration && s->streams[i]->start_time == AV_NOPTS_VALUE && !ogg->streams[i].got_start){
+                int64_t start= ogg_gptopts (s, i, ogg->streams[i].granule, NULL);
+                if(av_rescale_q(start, s->streams[i]->time_base, AV_TIME_BASE_Q) > AV_TIME_BASE)
+                    s->streams[i]->duration -= start;
+                ogg->streams[i].got_start= 1;
+                streams_left--;
+            }
+            if(streams_left<=0)
+                break;
         }
     }
     ogg_restore (s, 0);
@@ -605,15 +627,15 @@ static int64_t ogg_read_timestamp(AVFormatContext *s, int stream_index,
                                   int64_t *pos_arg, int64_t pos_limit)
 {
     struct ogg *ogg = s->priv_data;
-    struct ogg_stream *os = ogg->streams + stream_index;
     AVIOContext *bc = s->pb;
     int64_t pts = AV_NOPTS_VALUE;
-    int i;
+    int i = -1;
     avio_seek(bc, *pos_arg, SEEK_SET);
     ogg_reset(ogg);
 
     while (avio_tell(bc) < pos_limit && !ogg_packet(s, &i, NULL, NULL, pos_arg)) {
         if (i == stream_index) {
+            struct ogg_stream *os = ogg->streams + stream_index;
             pts = ogg_calc_pts(s, i, NULL);
             if (os->keyframe_seek && !(os->pflags & AV_PKT_FLAG_KEY))
                 pts = AV_NOPTS_VALUE;
@@ -639,6 +661,7 @@ static int ogg_read_seek(AVFormatContext *s, int stream_index,
         os->keyframe_seek = 1;
 
     ret = av_seek_frame_binary(s, stream_index, timestamp, flags);
+    os = ogg->streams + stream_index;
     if (ret < 0)
         os->keyframe_seek = 0;
     return ret;