static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
{
sample_t level=a52_level, bias=384;
int flags=a52_flags|A52_ADJUST_LEVEL;
int i,len=-1;
if (sh_audio->sample_format == AF_FORMAT_FLOAT_NE)
bias = 0;
if(!sh_audio->a_in_buffer_len)
if(a52_fillbuff(sh_audio)<0) return len; /* EOF */
sh_audio->a_in_buffer_len=0;
if (a52_frame (a52_state, sh_audio->a_in_buffer, &flags, &level, bias)){
mp_msg(MSGT_DECAUDIO,MSGL_WARN,"a52: error decoding frame\n");
return len;
}
/* handle dynrng */
if (a52_drc_action != DRC_NO_ACTION) {
if (a52_drc_action == DRC_NO_COMPRESSION)
a52_dynrng(a52_state, NULL, NULL);
else
a52_dynrng(a52_state, dynrng_call, NULL);
}
len=0;
for (i = 0; i < 6; i++) {
if (a52_block (a52_state)){
mp_msg(MSGT_DECAUDIO,MSGL_WARN,"a52: error at resampling\n");
break;
}
len+=2*a52_resample(a52_samples(a52_state),(int16_t *)&buf[len]);
}
assert(len <= maxlen);
return len;
}
static int a52_decode_frame(unsigned char *buf, int maxlen,
struct frame_fmt *fmt)
{
sample_t level = 1, bias = 384;
int flags;
int i, len = -1;
if (!a52_buffer.a_in_buffer_len)
if (a52_fillbuff(&a52_buffer) < 0)
return len;
a52_buffer.a_in_buffer_len = 0;
flags = a52_flags | A52_ADJUST_LEVEL;
level *= gain;
if (a52_frame(a52_state, a52_buffer.a_in_buffer, &flags, &level, bias)) {
printf("a52_decode_frame a52: error decoding frame\n");
return len;
}
len = 0;
for (i = 0; i < 6; i++) {
if (a52_block(a52_state)) {
printf("a52: error at resampling\n");
break;
}
len +=
2 * a52_resample(a52_samples(a52_state),
(int16_t *) & buf[len]);
}
assert(len <= maxlen);
return len;
}
