static int r3d_read_header(AVFormatContext *s)
{
R3DContext *r3d = s->priv_data;
Atom atom;
int ret;
if (read_atom(s, &atom) < 0) {
av_log(s, AV_LOG_ERROR, "error reading atom\n");
return -1;
}
if (atom.tag == MKTAG('R','E','D','1')) {
if ((ret = r3d_read_red1(s)) < 0) {
av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n");
return ret;
}
} else {
av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n");
return -1;
}
/* we cannot create the audio stream now because we do not know the
* sample rate */
if (r3d->audio_channels)
s->ctx_flags |= AVFMTCTX_NOHEADER;
s->internal->data_offset = avio_tell(s->pb);
av_log(s, AV_LOG_TRACE, "data offset %#"PRIx64"\n", s->internal->data_offset);
if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
return 0;
// find REOB/REOF/REOS to load index
avio_seek(s->pb, avio_size(s->pb)-48-8, SEEK_SET);
if (read_atom(s, &atom) < 0)
av_log(s, AV_LOG_ERROR, "error reading end atom\n");
if (atom.tag != MKTAG('R','E','O','B') &&
atom.tag != MKTAG('R','E','O','F') &&
atom.tag != MKTAG('R','E','O','S'))
goto out;
r3d_read_reos(s);
if (r3d->rdvo_offset) {
avio_seek(s->pb, r3d->rdvo_offset, SEEK_SET);
if (read_atom(s, &atom) < 0)
av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n");
if (atom.tag == MKTAG('R','D','V','O')) {
if (r3d_read_rdvo(s, &atom) < 0)
av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n");
}
}
out:
avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
return 0;
}
static int r3d_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
R3DContext *r3d = s->priv_data;
Atom atom;
int ret;
if (read_atom(s, &atom) < 0) {
av_log(s, AV_LOG_ERROR, "error reading atom\n");
return -1;
}
if (atom.tag == MKTAG('R','E','D','1')) {
if ((ret = r3d_read_red1(s)) < 0) {
av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n");
return ret;
}
} else {
av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n");
return -1;
}
s->data_offset = avio_tell(s->pb);
av_dlog(s, "data offset %#llx\n", s->data_offset);
if (!s->pb->seekable)
return 0;
// find REOB/REOF/REOS to load index
avio_seek(s->pb, avio_size(s->pb)-48-8, SEEK_SET);
if (read_atom(s, &atom) < 0)
av_log(s, AV_LOG_ERROR, "error reading end atom\n");
if (atom.tag != MKTAG('R','E','O','B') &&
atom.tag != MKTAG('R','E','O','F') &&
atom.tag != MKTAG('R','E','O','S'))
goto out;
r3d_read_reos(s);
if (r3d->rdvo_offset) {
avio_seek(s->pb, r3d->rdvo_offset, SEEK_SET);
if (read_atom(s, &atom) < 0)
av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n");
if (atom.tag == MKTAG('R','D','V','O')) {
if (r3d_read_rdvo(s, &atom) < 0)
av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n");
}
}
out:
avio_seek(s->pb, s->data_offset, SEEK_SET);
return 0;
}