From 73823cb941ee30a91703c50bfcf12d353a00a6de Mon Sep 17 00:00:00 2001 From: David Conrad Date: Thu, 11 Mar 2010 07:17:24 +0000 Subject: oggdec: Save offset of the page needed to reconstruct the current packet Originally committed as revision 22453 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavformat/oggdec.c | 16 +++++++++++++--- libavformat/oggdec.h | 2 ++ tests/ref/seek/lavf.ogg.ref | 40 ++++++++++++++++++++-------------------- 3 files changed, 35 insertions(+), 23 deletions(-) diff --git a/libavformat/oggdec.c b/libavformat/oggdec.c index 306f46211a..2c2cb2d3bc 100644 --- a/libavformat/oggdec.c +++ b/libavformat/oggdec.c @@ -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; } diff --git a/libavformat/oggdec.h b/libavformat/oggdec.h index b0a23e2516..425d7a291e 100644 --- a/libavformat/oggdec.h +++ b/libavformat/oggdec.h @@ -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; diff --git a/tests/ref/seek/lavf.ogg.ref b/tests/ref/seek/lavf.ogg.ref index 6af6a9825a..a4b9e63d30 100644 --- a/tests/ref/seek/lavf.ogg.ref +++ b/tests/ref/seek/lavf.ogg.ref @@ -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 -- cgit v1.2.3