diff options
Diffstat (limited to 'libavformat/oggparsetheora.c')
-rw-r--r-- | libavformat/oggparsetheora.c | 46 |
1 files changed, 44 insertions, 2 deletions
diff --git a/libavformat/oggparsetheora.c b/libavformat/oggparsetheora.c index d1559f4632..d646efcbfc 100644 --- a/libavformat/oggparsetheora.c +++ b/libavformat/oggparsetheora.c @@ -131,8 +131,13 @@ theora_gptopts(AVFormatContext *ctx, int idx, uint64_t gp, int64_t *dts) struct ogg *ogg = ctx->priv_data; struct ogg_stream *os = ogg->streams + idx; struct theora_params *thp = os->private; - uint64_t iframe = gp >> thp->gpshift; - uint64_t pframe = gp & thp->gpmask; + uint64_t iframe, pframe; + + if (!thp) + return AV_NOPTS_VALUE; + + iframe = gp >> thp->gpshift; + pframe = gp & thp->gpmask; if (thp->version < 0x030201) iframe++; @@ -146,9 +151,46 @@ theora_gptopts(AVFormatContext *ctx, int idx, uint64_t gp, int64_t *dts) return iframe + pframe; } +static int theora_packet(AVFormatContext *s, int idx) +{ + struct ogg *ogg = s->priv_data; + struct ogg_stream *os = ogg->streams + idx; + int duration; + + /* first packet handling + here we parse the duration of each packet in the first page and compare + the total duration to the page granule to find the encoder delay and + set the first timestamp */ + + if ((!os->lastpts || os->lastpts == AV_NOPTS_VALUE) && !(os->flags & OGG_FLAG_EOS)) { + int seg; + + duration = 1; + for (seg = os->segp; seg < os->nsegs; seg++) { + if (os->segments[seg] < 255) + duration ++; + } + + os->lastpts = os->lastdts = theora_gptopts(s, idx, os->granule, NULL) - duration; + if(s->streams[idx]->start_time == AV_NOPTS_VALUE) { + s->streams[idx]->start_time = os->lastpts; + if (s->streams[idx]->duration) + s->streams[idx]->duration -= s->streams[idx]->start_time; + } + } + + /* parse packet duration */ + if (os->psize > 0) { + os->pduration = 1; + } + + return 0; +} + const struct ogg_codec ff_theora_codec = { .magic = "\200theora", .magicsize = 7, .header = theora_header, + .packet = theora_packet, .gptopts = theora_gptopts }; |