[FFmpeg-cvslog] avi: try to synchronize the points in time of the starts of streams after seeking .

Michael Niedermayer git at videolan.org
Sun Apr 24 22:43:00 CEST 2011


ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sun Apr 24 22:38:05 2011 +0200| [fbfcc8f1b71b51ff87f09e269d22328be5594f40] | committer: Michael Niedermayer

avi: try to synchronize the points in time of the starts of streams after seeking.
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fbfcc8f1b71b51ff87f09e269d22328be5594f40
---

 libavformat/avidec.c    |   25 +++++++++++++------------
 tests/ref/seek/lavf_avi |   16 ++++++++--------
 2 files changed, 21 insertions(+), 20 deletions(-)

diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index 77d0686..83c55d0 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -54,6 +54,8 @@ typedef struct AVIStream {
     AVFormatContext *sub_ctx;
     AVPacket sub_pkt;
     uint8_t *sub_buffer;
+
+    int64_t seek_pos;
 } AVIStream;
 
 typedef struct {
@@ -987,6 +989,12 @@ resync:
             ast->packet_size= 0;
         }
 
+        if(!avi->non_interleaved && ast->seek_pos > pkt->pos){
+            av_free_packet(pkt);
+            goto resync;
+        }
+        ast->seek_pos= 0;
+
         return size;
     }
 
@@ -1252,7 +1260,7 @@ static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp
     AVIContext *avi = s->priv_data;
     AVStream *st;
     int i, index;
-    int64_t pos;
+    int64_t pos, pos_min;
     AVIStream *ast;
 
     if (!avi->index_loaded) {
@@ -1289,6 +1297,7 @@ static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp
         return 0;
     }
 
+    pos_min= pos;
     for(i = 0; i < s->nb_streams; i++) {
         AVStream *st2 = s->streams[i];
         AVIStream *ast2 = st2->priv_data;
@@ -1312,21 +1321,13 @@ static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp
                 flags | AVSEEK_FLAG_BACKWARD);
         if(index<0)
             index=0;
-
-        if(!avi->non_interleaved){
-            while(index>0 && st2->index_entries[index].pos > pos)
-                index--;
-            while(index+1 < st2->nb_index_entries && st2->index_entries[index].pos < pos)
-                index++;
-        }
-
-//        av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %"PRId64"\n", timestamp, index, st2->index_entries[index].timestamp);
-        /* extract the current frame number */
+        ast2->seek_pos= st2->index_entries[index].pos;
+        pos_min= FFMIN(pos_min,ast2->seek_pos);
         ast2->frame_offset = st2->index_entries[index].timestamp;
     }
 
     /* do the seek */
-    avio_seek(s->pb, pos, SEEK_SET);
+    avio_seek(s->pb, pos_min, SEEK_SET);
     avi->stream_index= -1;
     return 0;
 }
diff --git a/tests/ref/seek/lavf_avi b/tests/ref/seek/lavf_avi
index 964f0b8..6253960 100644
--- a/tests/ref/seek/lavf_avi
+++ b/tests/ref/seek/lavf_avi
@@ -8,27 +8,27 @@ ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 301466 size: 27864
 ret:-1         st: 0 flags:1  ts:-0.320000
 ret:-1         st: 1 flags:0  ts: 2.586122
 ret: 0         st: 1 flags:1  ts: 1.462857
-ret: 0         st: 1 flags:1 dts: 1.018776 pts: 1.018776 pos: 329774 size:   209
+ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 301466 size: 27864
 ret: 0         st:-1 flags:0  ts: 0.365002
-ret: 0         st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 156166 size: 27955
+ret: 0         st: 1 flags:1 dts: 0.470204 pts: 0.470204 pos: 155948 size:   209
 ret:-1         st:-1 flags:1  ts:-0.740831
 ret:-1         st: 0 flags:0  ts: 2.160000
 ret: 0         st: 0 flags:1  ts: 1.040000
 ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 301466 size: 27864
 ret: 0         st: 1 flags:0  ts:-0.052245
-ret: 0         st: 1 flags:1 dts: 0.000000 pts: 0.000000 pos:  37784 size:   208
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   9908 size: 27867
 ret: 0         st: 1 flags:1  ts: 2.847347
-ret: 0         st: 1 flags:1 dts: 1.018776 pts: 1.018776 pos: 329774 size:   209
+ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 301466 size: 27864
 ret:-1         st:-1 flags:0  ts: 1.730004
 ret: 0         st:-1 flags:1  ts: 0.624171
-ret: 0         st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 156166 size: 27955
+ret: 0         st: 1 flags:1 dts: 0.470204 pts: 0.470204 pos: 155948 size:   209
 ret: 0         st: 0 flags:0  ts:-0.480000
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   9908 size: 27867
 ret: 0         st: 0 flags:1  ts: 2.400000
 ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 301466 size: 27864
 ret:-1         st: 1 flags:0  ts: 1.306122
 ret: 0         st: 1 flags:1  ts: 0.208980
-ret: 0         st: 1 flags:1 dts: 0.208980 pts: 0.208980 pos:  92800 size:   209
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   9908 size: 27867
 ret: 0         st:-1 flags:0  ts:-0.904994
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   9908 size: 27867
 ret: 0         st:-1 flags:1  ts: 1.989173
@@ -38,7 +38,7 @@ ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 301466 size: 27864
 ret:-1         st: 0 flags:1  ts:-0.240000
 ret:-1         st: 1 flags:0  ts: 2.664490
 ret: 0         st: 1 flags:1  ts: 1.567347
-ret: 0         st: 1 flags:1 dts: 1.018776 pts: 1.018776 pos: 329774 size:   209
+ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 301466 size: 27864
 ret: 0         st:-1 flags:0  ts: 0.460008
-ret: 0         st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 156166 size: 27955
+ret: 0         st: 1 flags:1 dts: 0.470204 pts: 0.470204 pos: 155948 size:   209
 ret:-1         st:-1 flags:1  ts:-0.645825



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