int frame_size;
uint32_t header;
int header_count;
+ int no_bitrate;
} MpegAudioParseContext;
#define MPA_HEADER_SIZE 4
avctx->sample_rate= sr;
avctx->channels = channels;
s1->duration = frame_size;
- avctx->bit_rate = bit_rate;
+ if (s->no_bitrate || !avctx->bit_rate) {
+ s->no_bitrate = 1;
+ avctx->bit_rate += (bit_rate - avctx->bit_rate) / s->header_count;
+ }
}
break;
}
const int64_t xing_offtbl[2][2] = {{32, 17}, {17,9}};
MPADecodeHeader c;
int vbrtag_size = 0;
+ int is_cbr;
v = avio_rb32(s->pb);
if(ff_mpa_check_header(v) < 0)
/* Check for Xing / Info tag */
avio_skip(s->pb, xing_offtbl[c.lsf == 1][c.nb_channels == 1]);
v = avio_rb32(s->pb);
- if(v == MKBETAG('X', 'i', 'n', 'g') || v == MKBETAG('I', 'n', 'f', 'o')) {
+ is_cbr = v == MKBETAG('I', 'n', 'f', 'o');
+ if (v == MKBETAG('X', 'i', 'n', 'g') || is_cbr) {
v = avio_rb32(s->pb);
if(v & XING_FLAG_FRAMES)
frames = avio_rb32(s->pb);
if(frames)
st->duration = av_rescale_q(frames, (AVRational){spf, c.sample_rate},
st->time_base);
- if(size && frames)
+ if (size && frames && !is_cbr)
st->codec->bit_rate = av_rescale(size, 8 * c.sample_rate, frames * (int64_t)spf);
return 0;