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oggdec: Save offset of the page needed to reconstruct the current packet

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Originally committed as revision 22453 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
David Conrad 2010-03-11 07:17:24 +00:00
parent d38c9e7a91
commit 73823cb941
3 changed files with 35 additions and 23 deletions
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16
libavformat/oggdec.c
View File

@ -120,6 +120,8 @@ ogg_reset (struct ogg * ogg)
os->granule = -1;
os->lastpts = AV_NOPTS_VALUE;
os->lastdts = AV_NOPTS_VALUE;
os->sync_pos = -1;
os->page_pos = 0;
os->nsegs = 0;
os->segp = 0;
os->incomplete = 0;
@ -255,6 +257,7 @@ ogg_read_page (AVFormatContext * s, int *str)
}
os = ogg->streams + idx;
os->page_pos = url_ftell(bc) - 27;
if(os->psize > 0)
ogg_new_buf(ogg, idx);
@ -277,9 +280,11 @@ ogg_read_page (AVFormatContext * s, int *str)
if (seg < 255)
break;
}
os->sync_pos = os->page_pos;
}
}else{
os->psize = 0;
os->sync_pos = os->page_pos;
}
if (os->bufsize - os->bufpos < size){
@ -303,7 +308,7 @@ ogg_read_page (AVFormatContext * s, int *str)
}
static int
ogg_packet (AVFormatContext * s, int *str, int *dstart, int *dsize)
ogg_packet (AVFormatContext * s, int *str, int *dstart, int *dsize, int64_t *fpos)
{
struct ogg *ogg = s->priv_data;
int idx, i;
@ -394,8 +399,11 @@ ogg_packet (AVFormatContext * s, int *str, int *dstart, int *dsize)
*dstart = os->pstart;
if (dsize)
*dsize = os->psize;
if (fpos)
*fpos = os->sync_pos;
os->pstart += os->psize;
os->psize = 0;
os->sync_pos = os->page_pos;
}
// determine whether there are more complete packets in this page
@ -420,7 +428,7 @@ ogg_get_headers (AVFormatContext * s)
struct ogg *ogg = s->priv_data;
do{
if (ogg_packet (s, NULL, NULL, NULL) < 0)
if (ogg_packet (s, NULL, NULL, NULL, NULL) < 0)
return -1;
}while (!ogg->headers);
@ -520,10 +528,11 @@ ogg_read_packet (AVFormatContext * s, AVPacket * pkt)
struct ogg_stream *os;
int idx = -1;
int pstart, psize;
int64_t fpos;
//Get an ogg packet
do{
if (ogg_packet (s, &idx, &pstart, &psize) < 0)
if (ogg_packet (s, &idx, &pstart, &psize, &fpos) < 0)
return AVERROR(EIO);
}while (idx < 0 || !s->streams[idx]);
@ -557,6 +566,7 @@ ogg_read_packet (AVFormatContext * s, AVPacket * pkt)
pkt->flags = os->pflags;
pkt->duration = os->pduration;
pkt->pos = fpos;
return psize;
}

2
libavformat/oggdec.h
View File

@ -66,6 +66,8 @@ struct ogg_stream {
uint64_t granule;
int64_t lastpts;
int64_t lastdts;
int64_t sync_pos; ///< file offset of the first page needed to reconstruct the current packet
int64_t page_pos; ///< file offset of the current page
int flags;
const struct ogg_codec *codec;
int header;

40
tests/ref/seek/lavf.ogg.ref
View File

@ -1,53 +1,53 @@
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: -1 size: 1364
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 125 size: 1364
ret: 0 st:-1 flags:0 ts:-1.000000
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1390
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 5768 size: 1390
ret: 0 st:-1 flags:1 ts: 1.894167
ret:-EIO
ret: 0 st: 0 flags:0 ts: 0.788345
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1365
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 11410 size: 1365
ret: 0 st: 0 flags:1 ts:-0.317506
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1384
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 2936 size: 1384
ret: 0 st:-1 flags:0 ts: 2.576668
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1223
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 12808 size: 1223
ret: 0 st:-1 flags:1 ts: 1.470835
ret:-EIO
ret: 0 st: 0 flags:0 ts: 0.365011
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1390
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 5768 size: 1390
ret: 0 st: 0 flags:1 ts:-0.740839
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1384
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 2936 size: 1384
ret: 0 st:-1 flags:0 ts: 2.153336
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1223
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 12808 size: 1223
ret: 0 st:-1 flags:1 ts: 1.047503
ret:-EIO
ret: 0 st: 0 flags:0 ts:-0.058322
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1390
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 5768 size: 1390
ret: 0 st: 0 flags:1 ts: 2.835828
ret:-EIO
ret: 0 st:-1 flags:0 ts: 1.730004
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1223
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 12808 size: 1223
ret: 0 st:-1 flags:1 ts: 0.624171
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1370
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 7191 size: 1370
ret: 0 st: 0 flags:0 ts:-0.481655
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1390
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 5768 size: 1390
ret: 0 st: 0 flags:1 ts: 2.412494
ret:-EIO
ret: 0 st:-1 flags:0 ts: 1.306672
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1223
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 12808 size: 1223
ret: 0 st:-1 flags:1 ts: 0.200839
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1384
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 2936 size: 1384
ret: 0 st: 0 flags:0 ts:-0.904989
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1390
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 5768 size: 1390
ret: 0 st: 0 flags:1 ts: 1.989184
ret:-EIO
ret: 0 st:-1 flags:0 ts: 0.883340
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1223
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 12808 size: 1223
ret: 0 st:-1 flags:1 ts:-0.222493
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1384
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 2936 size: 1384
ret: 0 st: 0 flags:0 ts: 2.671678
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1223
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 12808 size: 1223
ret: 0 st: 0 flags:1 ts: 1.565850
ret:-EIO
ret: 0 st:-1 flags:0 ts: 0.460008
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1381
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 8594 size: 1381
ret: 0 st:-1 flags:1 ts:-0.645825
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: -1 size: 1384
ret: 0 st: 0 flags:1 dts: NOPTS pts: NOPTS pos: 2936 size: 1384