#define MPA_MONO 3
int l2_select_table(int bitrate, int nb_channels, int freq, int lsf);
+int mpa_decode_header(AVCodecContext *avctx, uint32_t head);
extern const uint16_t mpa_bitrate_tab[2][3][15];
extern const uint16_t mpa_freq_tab[3];
}
/* useful helper to get mpeg audio stream infos. Return -1 if error in
- header */
-int mp_decode_header(int *sample_rate_ptr,
- int *nb_channels_ptr,
- int *coded_frame_size_ptr,
- int *decoded_frame_size_ptr,
- uint32_t head)
+ header, otherwise the coded frame size in bytes */
+int mpa_decode_header(AVCodecContext *avctx, uint32_t head)
{
MPADecodeContext s1, *s = &s1;
- int decoded_frame_size;
if (check_header(head) != 0)
return -1;
switch(s->layer) {
case 1:
- decoded_frame_size = 384;
+ avctx->frame_size = 384;
break;
case 2:
- decoded_frame_size = 1152;
+ avctx->frame_size = 1152;
break;
default:
case 3:
if (s->lsf)
- decoded_frame_size = 576;
+ avctx->frame_size = 576;
else
- decoded_frame_size = 1152;
+ avctx->frame_size = 1152;
break;
}
- *sample_rate_ptr = s->sample_rate;
- *nb_channels_ptr = s->nb_channels;
- *coded_frame_size_ptr = s->frame_size;
- *decoded_frame_size_ptr = decoded_frame_size * 2 * s->nb_channels;
- return 0;
+ avctx->sample_rate = s->sample_rate;
+ avctx->channels = s->nb_channels;
+ avctx->bit_rate = s->bit_rate;
+ avctx->sub_id = s->layer;
+ return s->frame_size;
}
/* return the number of decoded frames */