+ st->codec->bits_per_sample = 16 + ((b1 >> 6) & 3) * 4;
+ st->codec->bit_rate = st->codec->channels *
+ st->codec->sample_rate *
+ st->codec->bits_per_sample;
+ if (st->codec->bits_per_sample == 16)
+ st->codec->codec_id = CODEC_ID_PCM_S16BE;
+ else if (st->codec->bits_per_sample == 28)
+ return AVERROR(EINVAL);