static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
{
AVStream *st;
int width, height;
if (avio_rl32(pb) != TAG_VBHD)
{
av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
return -1;
}
if(avio_rb32(pb) != 32)
{
av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
return -1;
}
if(avio_rl16(pb) != 1)
{
av_log(s, AV_LOG_ERROR, "Incorrect header version\n");
return -1;
}
width = avio_rl16(pb);
height = avio_rl16(pb);
avio_skip(pb, 4);
c->frames = avio_rl16(pb);
if(!c->frames)
{
av_log(s, AV_LOG_ERROR, "File contains no frames ???\n");
return -1;
}
c->bits = avio_rl16(pb);
c->rate = avio_rl16(pb);
c->block_align = c->rate * (c->bits >> 3);
avio_skip(pb, 16); //zeroes
st = av_new_stream(s, 0);
if (!st)
return -1;
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_VB;
st->codec->codec_tag = MKTAG('V', 'B', 'V', '1');
st->codec->width = width;
st->codec->height = height;
st->codec->pix_fmt = PIX_FMT_PAL8;
av_set_pts_info(st, 16, 1, 12);
c->cur_frame = 0;
c->has_video = 1;
c->has_audio = !!c->rate;
c->curstrm = -1;
if (c->has_audio && create_audio_stream(s, c) < 0)
return -1;
return 0;
}
static int siff_parse_soun(AVFormatContext *s, SIFFContext *c, ByteIOContext *pb)
{
if (get_le32(pb) != TAG_SHDR){
av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
return -1;
}
if(get_be32(pb) != 8){
av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
return -1;
}
url_fskip(pb, 4); //unknown value
c->rate = get_le16(pb);
c->bits = get_le16(pb);
c->block_align = c->rate * (c->bits >> 3);
return create_audio_stream(s, c);
}
static bool init_streams(struct ffmpeg_mux *ffm)
{
if (ffm->params.has_video)
create_video_stream(ffm);
if (ffm->params.tracks) {
ffm->audio_streams =
calloc(1, ffm->params.tracks * sizeof(void*));
for (int i = 0; i < ffm->params.tracks; i++)
create_audio_stream(ffm, i);
}
if (!ffm->video_stream && !ffm->num_audio_streams)
return false;
return true;
}
