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;
}
static int liba52_init(adec_feeder_t * feeder)
{
uint32_t a52_accel = 0;
int flags = 0;
c_feeder = feeder;
if (feeder == NULL)
return -1;
memset(&a52_buffer, 0, sizeof(a52_buffer));
a52_buffer.a_in_buffer = frame_buffer;
a52_state = a52_init(a52_accel);
if (a52_state == NULL) {
printf("A52 init failed !\n");
return -1;
}
if (a52_fillbuff(&a52_buffer) < 0) {
printf("A52 sync failed !\n");
return -1;
}
a52_buffer.channels = audio_output_channels;
switch (a52_buffer.channels) {
case 1:
a52_flags = A52_MONO;
break;
/*case 2: a52_flags=A52_STEREO; break; */
case 2:
a52_flags = A52_DOLBY;
break;
/*case 3: a52_flags=A52_3F; break; */
case 3:
a52_flags = A52_2F1R;
break;
case 4:
a52_flags = A52_2F2R;
break; /* 2+2 */
case 5:
a52_flags = A52_3F2R;
break;
case 6:
a52_flags = A52_3F2R | A52_LFE;
break; /* 5.1 */
}
flags |= a52_flags;
if (a52_resample_init(a52_accel, flags, a52_buffer.channels) < 0) {
printf("a52_resample_init failed!\n");
a52_free(a52_state);
return -1;
}
feeder->channel_num = audio_output_channels;
feeder->sample_rate = a52_buffer.samplerate;
return 0;
}
static int control(sh_audio_t *sh,int cmd,void* arg, ...)
{
switch(cmd)
{
case ADCTRL_RESYNC_STREAM:
case ADCTRL_SKIP_FRAME:
a52_fillbuff(sh);
return CONTROL_TRUE;
case ADCTRL_SET_VOLUME: {
float vol = *(float*)arg;
if (vol > 60.0) vol = 60.0;
a52_level = vol <= -200.0 ? 0 : pow(10.0,vol/20.0);
return CONTROL_TRUE;
}
case ADCTRL_QUERY_FORMAT:
if (*(int*)arg == AF_FORMAT_S16_NE ||
*(int*)arg == AF_FORMAT_FLOAT_NE)
return CONTROL_TRUE;
return CONTROL_FALSE;
}
return CONTROL_UNKNOWN;
}
static int init(sh_audio_t *sh_audio)
{
uint32_t a52_accel=0;
sample_t level=a52_level, bias=384;
int flags=0;
/* Dolby AC3 audio:*/
#ifdef MM_ACCEL_X86_SSE
if(gCpuCaps.hasSSE) a52_accel|=MM_ACCEL_X86_SSE;
#endif
if(gCpuCaps.hasMMX) a52_accel|=MM_ACCEL_X86_MMX;
if(gCpuCaps.hasMMX2) a52_accel|=MM_ACCEL_X86_MMXEXT;
if(gCpuCaps.has3DNow) a52_accel|=MM_ACCEL_X86_3DNOW;
#ifdef MM_ACCEL_X86_3DNOWEXT
if(gCpuCaps.has3DNowExt) a52_accel|=MM_ACCEL_X86_3DNOWEXT;
#endif
#ifdef MM_ACCEL_PPC_ALTIVEC
if(gCpuCaps.hasAltiVec) a52_accel|=MM_ACCEL_PPC_ALTIVEC;
#endif
a52_state=a52_init (a52_accel);
if (a52_state == NULL) {
mp_msg(MSGT_DECAUDIO,MSGL_ERR,"A52 init failed\n");
return 0;
}
sh_audio->sample_format = AF_FORMAT_FLOAT_NE;
if(a52_fillbuff(sh_audio)<0){
mp_msg(MSGT_DECAUDIO,MSGL_ERR,"A52 sync failed\n");
return 0;
}
/* Init a52 dynrng */
if (drc_level < 0.001) {
/* level == 0 --> no compression, init library without callback */
a52_drc_action = DRC_NO_COMPRESSION;
} else if (drc_level > 0.999) {
/* level == 1 --> full compression, do nothing at all (library default = full compression) */
a52_drc_action = DRC_NO_ACTION;
} else {
a52_drc_action = DRC_CALLBACK;
}
/* Library init for dynrng has to be done for each frame, see decode_audio() */
/* 'a52 cannot upmix' hotfix:*/
a52_printinfo(sh_audio);
sh_audio->channels=audio_output_channels;
while(sh_audio->channels>0){
switch(sh_audio->channels){
case 1: a52_flags=A52_MONO; break;
/* case 2: a52_flags=A52_STEREO; break;*/
case 2: a52_flags=A52_DOLBY; break;
/* case 3: a52_flags=A52_3F; break;*/
case 3: a52_flags=A52_2F1R; break;
case 4: a52_flags=A52_2F2R; break; /* 2+2*/
case 5: a52_flags=A52_3F2R; break;
case 6: a52_flags=A52_3F2R|A52_LFE; break; /* 5.1*/
}
/* test:*/
flags=a52_flags|A52_ADJUST_LEVEL;
mp_msg(MSGT_DECAUDIO,MSGL_V,"A52 flags before a52_frame: 0x%X\n",flags);
if (a52_frame (a52_state, sh_audio->a_in_buffer, &flags, &level, bias)){
mp_msg(MSGT_DECAUDIO,MSGL_ERR,"a52: error decoding frame -> nosound\n");
return 0;
}
mp_msg(MSGT_DECAUDIO,MSGL_V,"A52 flags after a52_frame: 0x%X\n",flags);
/* frame decoded, let's init resampler:*/
channel_map = 0;
if (sh_audio->sample_format == AF_FORMAT_FLOAT_NE) {
if (!(flags & A52_LFE)) {
switch ((flags<<3) | sh_audio->channels) {
case (A52_MONO << 3) | 1: channel_map = 0x1; break;
case (A52_CHANNEL << 3) | 2:
case (A52_STEREO << 3) | 2:
case (A52_DOLBY << 3) | 2: channel_map = 0x21; break;
case (A52_2F1R << 3) | 3: channel_map = 0x321; break;
case (A52_2F2R << 3) | 4: channel_map = 0x4321; break;
case (A52_3F << 3) | 5: channel_map = 0x2ff31; break;
case (A52_3F2R << 3) | 5: channel_map = 0x25431; break;
}
} else if (sh_audio->channels == 6) {
switch (flags & ~A52_LFE) {
case A52_MONO : channel_map = 0x12ffff; break;
case A52_CHANNEL:
case A52_STEREO :
case A52_DOLBY : channel_map = 0x1fff32; break;
case A52_3F : channel_map = 0x13ff42; break;
case A52_2F1R : channel_map = 0x1f4432; break;
case A52_2F2R : channel_map = 0x1f5432; break;
case A52_3F2R : channel_map = 0x136542; break;
}
}
if (channel_map) {
a52_resample = a52_resample_float;
break;
}
} else
break;
}
if(sh_audio->channels<=0){
mp_msg(MSGT_DECAUDIO,MSGL_ERR,"a52: no resampler. try different channel setup!\n");
return 0;
}
return 1;
}
