int64_t pos;
st = s->streams[0];
- switch(st->codec->codec_id) {
- case CODEC_ID_PCM_S16LE:
- case CODEC_ID_PCM_S16BE:
- case CODEC_ID_PCM_U16LE:
- case CODEC_ID_PCM_U16BE:
- block_align = 2 * st->codec->channels;
- byte_rate = block_align * st->codec->sample_rate;
- break;
- case CODEC_ID_PCM_S8:
- case CODEC_ID_PCM_U8:
- case CODEC_ID_PCM_MULAW:
- case CODEC_ID_PCM_ALAW:
- block_align = st->codec->channels;
- byte_rate = block_align * st->codec->sample_rate;
- break;
- default:
- block_align = st->codec->block_align;
- byte_rate = st->codec->bit_rate / 8;
- break;
- }
+
+ block_align = st->codec->block_align ? st->codec->block_align :
+ (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
+ byte_rate = st->codec->bit_rate ? st->codec->bit_rate >> 3 :
+ block_align * st->codec->sample_rate;
if (block_align <= 0 || byte_rate <= 0)
return -1;