p_dec->fmt_out.audio.i_physical_channels =        p_sys->i_channels_conf & AOUT_CHAN_PHYSMASK;    p_dec->fmt_out.i_bitrate = p_sys->i_bit_rate;    if( p_sys->b_packetizer )    {        block_t *p_sout_buffer = GetSoutBuffer( p_dec );        p_buf = p_sout_buffer ? p_sout_buffer->p_buffer : NULL;        *pp_out_buffer = p_sout_buffer;    }    else    {        aout_buffer_t *p_aout_buffer = GetAoutBuffer( p_dec );        p_buf = p_aout_buffer ? p_aout_buffer->p_buffer : NULL;        *pp_out_buffer = p_aout_buffer;    }    return p_buf;}/***************************************************************************** * GetAoutBuffer: *****************************************************************************/static aout_buffer_t *GetAoutBuffer( decoder_t *p_dec ){    decoder_sys_t *p_sys = p_dec->p_sys;    aout_buffer_t *p_buf;    /* Hack for DTS S/PDIF filter which needs to send 3 frames at a time     * (plus a few header bytes) */    p_buf = p_dec->pf_aout_buffer_new( p_dec, p_sys->i_frame_length * 4 );    if( p_buf == NULL ) return NULL;    p_buf->i_nb_samples = p_sys->i_frame_length;    p_buf->i_nb_bytes = p_sys->i_frame_size;    p_buf->start_date = aout_DateGet( &p_sys->end_date );    p_buf->end_date =        aout_DateIncrement( &p_sys->end_date, p_sys->i_frame_length );    return p_buf;}/***************************************************************************** * GetSoutBuffer: *****************************************************************************/static block_t *GetSoutBuffer( decoder_t *p_dec ){    decoder_sys_t *p_sys = p_dec->p_sys;    block_t *p_block;    p_block = block_New( p_dec, p_sys->i_frame_size );    if( p_block == NULL ) return NULL;    p_block->i_pts = p_block->i_dts = aout_DateGet( &p_sys->end_date );    p_block->i_length = aout_DateIncrement( &p_sys->end_date,        p_sys->i_frame_length ) - p_block->i_pts;    return p_block;}/***************************************************************************** * SyncInfo: parse DTS sync info *****************************************************************************/static const unsigned int ppi_dts_samplerate[] ={    0, 8000, 16000, 32000, 0, 0, 11025, 22050, 44100, 0, 0,    12000, 24000, 48000, 96000, 192000};static const unsigned int ppi_dts_bitrate[] ={    32000, 56000, 64000, 96000, 112000, 128000,    192000, 224000, 256000, 320000, 384000,    448000, 512000, 576000, 640000, 768000,    896000, 1024000, 1152000, 1280000, 1344000,    1408000, 1411200, 1472000, 1536000, 1920000,    2048000, 3072000, 3840000, 1/*open*/, 2/*variable*/, 3/*lossless*/};static int SyncInfo16be( const uint8_t *p_buf,                         unsigned int *pi_audio_mode,                         unsigned int *pi_sample_rate,                         unsigned int *pi_bit_rate,                         unsigned int *pi_frame_length ){    unsigned int i_frame_size;    unsigned int i_lfe;    *pi_frame_length = (p_buf[4] & 0x01) << 6 | (p_buf[5] >> 2);    i_frame_size = (p_buf[5] & 0x03) << 12 | (p_buf[6] << 4) |                   (p_buf[7] >> 4);    *pi_audio_mode = (p_buf[7] & 0x0f) << 2 | (p_buf[8] >> 6);    *pi_sample_rate = (p_buf[8] >> 2) & 0x0f;    *pi_bit_rate = (p_buf[8] & 0x03) << 3 | ((p_buf[9] >> 5) & 0x07);    i_lfe = (p_buf[10] >> 1) & 0x03;    if( i_lfe ) *pi_audio_mode |= 0x10000;    return i_frame_size + 1;}static void BufLeToBe( uint8_t *p_out, const uint8_t *p_in, int i_in ){    int i;    for( i = 0; i < i_in/2; i++  )    {        p_out[i*2] = p_in[i*2+1];        p_out[i*2+1] = p_in[i*2];    }}static int Buf14To16( uint8_t *p_out, const uint8_t *p_in, int i_in, int i_le ){    unsigned char tmp, cur = 0;    int bits_in, bits_out = 0;    int i, i_out = 0;    for( i = 0; i < i_in; i++  )    {        if( i%2 )        {            tmp = p_in[i-i_le];            bits_in = 8;        }        else        {            tmp = p_in[i+i_le] & 0x3F;            bits_in = 8 - 2;        }        if( bits_out < 8 )        {            int need = __MIN( 8 - bits_out, bits_in );            cur <<= need;            cur |= ( tmp >> (bits_in - need) );            tmp <<= (8 - bits_in + need);            tmp >>= (8 - bits_in + need);            bits_in -= need;            bits_out += need;        }        if( bits_out == 8 )        {            p_out[i_out] = cur;            cur = 0;            bits_out = 0;            i_out++;        }        bits_out += bits_in;        cur <<= bits_in;        cur |= tmp;    }    return i_out;}static inline int SyncCode( const uint8_t *p_buf ){    /* 14 bits, little endian version of the bitstream */    if( p_buf[0] == 0xff && p_buf[1] == 0x1f &&        p_buf[2] == 0x00 && p_buf[3] == 0xe8 &&        (p_buf[4] & 0xf0) == 0xf0 && p_buf[5] == 0x07 )    {        return VLC_SUCCESS;    }    /* 14 bits, big endian version of the bitstream */    else if( p_buf[0] == 0x1f && p_buf[1] == 0xff &&             p_buf[2] == 0xe8 && p_buf[3] == 0x00 &&             p_buf[4] == 0x07 && (p_buf[5] & 0xf0) == 0xf0 )    {        return VLC_SUCCESS;    }    /* 16 bits, big endian version of the bitstream */    else if( p_buf[0] == 0x7f && p_buf[1] == 0xfe &&             p_buf[2] == 0x80 && p_buf[3] == 0x01 )    {        return VLC_SUCCESS;    }    /* 16 bits, little endian version of the bitstream */    else if( p_buf[0] == 0xfe && p_buf[1] == 0x7f &&             p_buf[2] == 0x01 && p_buf[3] == 0x80 )    {        return VLC_SUCCESS;    }    else return VLC_EGENERIC;}static int SyncInfo( const uint8_t *p_buf,                     unsigned int *pi_channels,                     unsigned int *pi_channels_conf,                     unsigned int *pi_sample_rate,                     unsigned int *pi_bit_rate,                     unsigned int *pi_frame_length ){    unsigned int i_audio_mode;    unsigned int i_frame_size;    /* 14 bits, little endian version of the bitstream */    if( p_buf[0] == 0xff && p_buf[1] == 0x1f &&        p_buf[2] == 0x00 && p_buf[3] == 0xe8 &&        (p_buf[4] & 0xf0) == 0xf0 && p_buf[5] == 0x07 )    {        uint8_t conv_buf[DTS_HEADER_SIZE];        Buf14To16( conv_buf, p_buf, DTS_HEADER_SIZE, 1 );        i_frame_size = SyncInfo16be( conv_buf, &i_audio_mode, pi_sample_rate,                                     pi_bit_rate, pi_frame_length );        i_frame_size = i_frame_size * 8 / 14 * 2;    }    /* 14 bits, big endian version of the bitstream */    else if( p_buf[0] == 0x1f && p_buf[1] == 0xff &&             p_buf[2] == 0xe8 && p_buf[3] == 0x00 &&             p_buf[4] == 0x07 && (p_buf[5] & 0xf0) == 0xf0 )    {        uint8_t conv_buf[DTS_HEADER_SIZE];        Buf14To16( conv_buf, p_buf, DTS_HEADER_SIZE, 0 );        i_frame_size = SyncInfo16be( conv_buf, &i_audio_mode, pi_sample_rate,                                     pi_bit_rate, pi_frame_length );        i_frame_size = i_frame_size * 8 / 14 * 2;    }    /* 16 bits, big endian version of the bitstream */    else if( p_buf[0] == 0x7f && p_buf[1] == 0xfe &&             p_buf[2] == 0x80 && p_buf[3] == 0x01 )    {        i_frame_size = SyncInfo16be( p_buf, &i_audio_mode, pi_sample_rate,                                     pi_bit_rate, pi_frame_length );    }    /* 16 bits, little endian version of the bitstream */    else if( p_buf[0] == 0xfe && p_buf[1] == 0x7f &&             p_buf[2] == 0x01 && p_buf[3] == 0x80 )    {        uint8_t conv_buf[DTS_HEADER_SIZE];        BufLeToBe( conv_buf, p_buf, DTS_HEADER_SIZE );        i_frame_size = SyncInfo16be( p_buf, &i_audio_mode, pi_sample_rate,                                     pi_bit_rate, pi_frame_length );    }    else return 0;    switch( i_audio_mode & 0xFFFF )    {        case 0x0:            /* Mono */            *pi_channels_conf = AOUT_CHAN_CENTER;            break;        case 0x1:            /* Dual-mono = stereo + dual-mono */            *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |                           AOUT_CHAN_DUALMONO;            break;        case 0x2:        case 0x3:        case 0x4:            /* Stereo */            *pi_channels = 2;            *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;            break;        case 0x5:            /* 3F */            *pi_channels = 3;            *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |                                AOUT_CHAN_CENTER;            break;        case 0x6:            /* 2F/1R */            *pi_channels = 3;            *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |                                AOUT_CHAN_REARCENTER;            break;        case 0x7:            /* 3F/1R */            *pi_channels = 4;            *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |                                AOUT_CHAN_CENTER | AOUT_CHAN_REARCENTER;            break;        case 0x8:            /* 2F2R */            *pi_channels = 4;            *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |                                AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;            break;        case 0x9:            /* 3F2R */            *pi_channels = 5;            *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |                                AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |                                AOUT_CHAN_REARRIGHT;            break;        case 0xA:        case 0xB:            /* 2F2M2R */            *pi_channels = 6;            *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |                                AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT |                                AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;            break;        case 0xC:            /* 3F2M2R */            *pi_channels = 7;            *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |                                AOUT_CHAN_CENTER | AOUT_CHAN_MIDDLELEFT |                                AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_REARLEFT |                                AOUT_CHAN_REARRIGHT;            break;        case 0xD:        case 0xE:            /* 3F2M2R/LFE */            *pi_channels = 8;            *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |                                AOUT_CHAN_CENTER | AOUT_CHAN_MIDDLELEFT |                                AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_REARLEFT |                                AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;            break;        default:            if( i_audio_mode <= 63 )            {                /* User defined */                *pi_channels = 0;                *pi_channels_conf = 0;            }            else return 0;            break;    }    if( i_audio_mode & 0x10000 )    {        (*pi_channels)++;        *pi_channels_conf |= AOUT_CHAN_LFE;    }    if( *pi_sample_rate >= sizeof( ppi_dts_samplerate ) /                           sizeof( ppi_dts_samplerate[0] ) )    {        return 0;    }    *pi_sample_rate = ppi_dts_samplerate[ *pi_sample_rate ];    if( !*pi_sample_rate ) return 0;    if( *pi_bit_rate >= sizeof( ppi_dts_bitrate ) /                        sizeof( ppi_dts_bitrate[0] ) )    {        return 0;    }    *pi_bit_rate = ppi_dts_bitrate[ *pi_bit_rate ];    if( !*pi_bit_rate ) return 0;    *pi_frame_length = (*pi_frame_length + 1) * 32;    return i_frame_size;}