/**
- Copyright (C) 2005 Matthieu CASTET
+ Copyright (C) 2005 Matthieu CASTET, Alex Beregszaszi
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
return 0;
if(!thp){
- thp = av_mallocz(sizeof(*thp));
- os->private = thp;
+ thp = av_mallocz(sizeof(*thp));
+ os->private = thp;
}
if (os->buf[os->pstart] == 0x80) {
GetBitContext gb;
+ int version;
+
init_get_bits(&gb, os->buf + os->pstart, os->psize*8);
skip_bits(&gb, 7*8); /* 0x80"theora" */
- if(get_bits(&gb, 8) != 3) /* major version */
- return -1;
- if(get_bits(&gb, 8) != 2) /* minor version */
+
+ version = get_bits(&gb, 8) << 16;
+ version |= get_bits(&gb, 8) << 8;
+ version |= get_bits(&gb, 8);
+
+ if (version < 0x030100)
+ {
+ av_log(s, AV_LOG_ERROR,
+ "Too old or unsupported Theora (%x)\n", version);
return -1;
- skip_bits(&gb, 8); /* revision */
+ }
st->codec->width = get_bits(&gb, 16) << 4;
st->codec->height = get_bits(&gb, 16) << 4;
- skip_bits(&gb, 64);
+ if (version >= 0x030400)
+ skip_bits(&gb, 164);
+ else
+ skip_bits(&gb, 64);
st->codec->time_base.den = get_bits(&gb, 32);
st->codec->time_base.num = get_bits(&gb, 32);
+ st->time_base = st->codec->time_base;
st->codec->sample_aspect_ratio.num = get_bits(&gb, 24);
st->codec->sample_aspect_ratio.den = get_bits(&gb, 24);
- skip_bits(&gb, 38);
+ if (version >= 0x030200)
+ skip_bits(&gb, 38);
+ if (version >= 0x304000)
+ skip_bits(&gb, 2);
+
thp->gpshift = get_bits(&gb, 5);
- thp->gpmask = (1 << thp->gpshift) - 1;
+ thp->gpmask = (1 << thp->gpshift) - 1;
st->codec->codec_type = CODEC_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_THEORA;
static uint64_t
theora_gptopts(AVFormatContext *ctx, int idx, uint64_t gp)
{
- AVStream *st = ctx->streams[idx];
ogg_t *ogg = ctx->priv_data;
ogg_stream_t *os = ogg->streams + idx;
theora_params_t *thp = os->private;
uint64_t iframe = gp >> thp->gpshift;
uint64_t pframe = gp & thp->gpmask;
- return (iframe + pframe) * AV_TIME_BASE * st->codec->time_base.num /
- st->codec->time_base.den;
+ return iframe + pframe;
}
ogg_codec_t theora_codec = {