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vlc/modules/codec/dts.c

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/*****************************************************************************
* dts.c: parse DTS audio sync info and packetize the stream
*****************************************************************************
* Copyright (C) 2003-2009 the VideoLAN team
* $Id$
*
* Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
* Gildas Bazin <gbazin@netcourrier.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <assert.h>
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_codec.h>
#include <vlc_aout.h>
#include <vlc_block_helper.h>
#include <vlc_bits.h>
#include <vlc_modules.h>
#include <vlc_cpu.h>
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int OpenDecoder ( vlc_object_t * );
static int OpenPacketizer( vlc_object_t * );
static void CloseCommon ( vlc_object_t * );
vlc_module_begin ()
set_description( N_("DTS parser") )
set_capability( "decoder", 100 )
set_callbacks( OpenDecoder, CloseCommon )
add_submodule ()
set_description( N_("DTS audio packetizer") )
set_capability( "packetizer", 10 )
set_callbacks( OpenPacketizer, CloseCommon )
vlc_module_end ()
/*****************************************************************************
* decoder_sys_t : decoder descriptor
*****************************************************************************/
struct decoder_sys_t
{
/* Module mode */
bool b_packetizer;
/*
* Input properties
*/
int i_state;
block_bytestream_t bytestream;
/*
* Common properties
*/
date_t end_date;
mtime_t i_pts;
bool b_dts_hd; /* Is the current frame a DTS HD one */
unsigned int i_bit_rate;
unsigned int i_frame_size;
unsigned int i_frame_length;
unsigned int i_rate;
unsigned int i_channels;
unsigned int i_channels_conf;
};
enum {
STATE_NOSYNC,
STATE_SYNC,
STATE_HEADER,
STATE_NEXT_SYNC,
STATE_GET_DATA,
STATE_SEND_DATA
};
#define DTS_HEADER_SIZE 14
/****************************************************************************
* Local prototypes
****************************************************************************/
static int OpenCommon( vlc_object_t *, bool b_packetizer );
static void *DecodeBlock( decoder_t *, block_t ** );
static inline int SyncCode( const uint8_t * );
static int SyncInfo( const uint8_t *, bool *, unsigned int *, unsigned int *,
unsigned int *, unsigned int *, unsigned int * );
static uint8_t *GetOutBuffer ( decoder_t *, block_t ** );
static aout_buffer_t *GetAoutBuffer( decoder_t * );
static block_t *GetSoutBuffer( decoder_t * );
/*****************************************************************************
* OpenDecoder: probe the decoder
*****************************************************************************/
static int OpenDecoder( vlc_object_t *p_this )
{
/* HACK: Don't use this codec if we don't have an dts audio filter */
if( !HAVE_FPU || !module_exists( "dtstofloat32" ) )
return VLC_EGENERIC;
return OpenCommon( p_this, false );
}
/*****************************************************************************
* OpenPacketizer: probe the packetizer
*****************************************************************************/
static int OpenPacketizer( vlc_object_t *p_this )
{
return OpenCommon( p_this, true );
}
/*****************************************************************************
* OpenCommon:
*****************************************************************************/
static int OpenCommon( vlc_object_t *p_this, bool b_packetizer )
{
decoder_t *p_dec = (decoder_t*)p_this;
decoder_sys_t *p_sys;
if( p_dec->fmt_in.i_codec != VLC_CODEC_DTS )
return VLC_EGENERIC;
/* Allocate the memory needed to store the decoder's structure */
if( ( p_dec->p_sys = p_sys = malloc(sizeof(*p_sys)) ) == NULL )
return VLC_ENOMEM;
/* Misc init */
p_sys->b_packetizer = b_packetizer;
p_sys->i_state = STATE_NOSYNC;
date_Set( &p_sys->end_date, 0 );
p_sys->b_dts_hd = false;
p_sys->i_pts = VLC_TS_INVALID;
block_BytestreamInit( &p_sys->bytestream );
/* Set output properties */
p_dec->fmt_out.i_cat = AUDIO_ES;
p_dec->fmt_out.i_codec = VLC_CODEC_DTS;
p_dec->fmt_out.audio.i_rate = 0; /* So end_date gets initialized */
/* Set callback */
p_dec->pf_decode_audio = (aout_buffer_t *(*)(decoder_t *, block_t **))
DecodeBlock;
p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **))
DecodeBlock;
return VLC_SUCCESS;
}
/****************************************************************************
* DecodeBlock: the whole thing
****************************************************************************/
static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
uint8_t p_header[DTS_HEADER_SIZE];
uint8_t *p_buf;
block_t *p_out_buffer;
if( !pp_block || !*pp_block )
return NULL;
if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
{
if( (*pp_block)->i_flags&BLOCK_FLAG_CORRUPTED )
{
p_sys->i_state = STATE_NOSYNC;
block_BytestreamEmpty( &p_sys->bytestream );
}
date_Set( &p_sys->end_date, 0 );
block_Release( *pp_block );
return NULL;
}
if( !date_Get( &p_sys->end_date ) && (*pp_block)->i_pts <= VLC_TS_INVALID )
{
/* We've just started the stream, wait for the first PTS. */
block_Release( *pp_block );
return NULL;
}
block_BytestreamPush( &p_sys->bytestream, *pp_block );
while( 1 )
{
switch( p_sys->i_state )
{
case STATE_NOSYNC:
/* Look for sync code - should be 0x7ffe8001 */
while( block_PeekBytes( &p_sys->bytestream, p_header, 6 )
== VLC_SUCCESS )
{
if( SyncCode( p_header ) == VLC_SUCCESS )
{
p_sys->i_state = STATE_SYNC;
break;
}
block_SkipByte( &p_sys->bytestream );
}
if( p_sys->i_state != STATE_SYNC )
{
block_BytestreamFlush( &p_sys->bytestream );
/* Need more data */
return NULL;
}
case STATE_SYNC:
/* New frame, set the Presentation Time Stamp */
p_sys->i_pts = p_sys->bytestream.p_block->i_pts;
if( p_sys->i_pts > VLC_TS_INVALID &&
p_sys->i_pts != date_Get( &p_sys->end_date ) )
{
date_Set( &p_sys->end_date, p_sys->i_pts );
}
p_sys->i_state = STATE_HEADER;
case STATE_HEADER:
/* Get DTS frame header (DTS_HEADER_SIZE bytes) */
if( block_PeekBytes( &p_sys->bytestream, p_header,
DTS_HEADER_SIZE ) != VLC_SUCCESS )
{
/* Need more data */
return NULL;
}
/* Check if frame is valid and get frame info */
p_sys->i_frame_size = SyncInfo( p_header,
&p_sys->b_dts_hd,
&p_sys->i_channels,
&p_sys->i_channels_conf,
&p_sys->i_rate,
&p_sys->i_bit_rate,
&p_sys->i_frame_length );
if( !p_sys->i_frame_size )
{
msg_Dbg( p_dec, "emulated sync word" );
block_SkipByte( &p_sys->bytestream );
p_sys->i_state = STATE_NOSYNC;
break;
}
p_sys->i_state = STATE_NEXT_SYNC;
case STATE_NEXT_SYNC:
/* TODO: If pp_block == NULL, flush the buffer without checking the
* next sync word */
/* Check if next expected frame contains the sync word */
if( block_PeekOffsetBytes( &p_sys->bytestream,
p_sys->i_frame_size, p_header, 6 )
!= VLC_SUCCESS )
{
/* Need more data */
return NULL;
}
if( p_sys->b_packetizer &&
p_header[0] == 0 && p_header[1] == 0 )
{
/* DTS wav files and audio CD's use stuffing */
p_sys->i_state = STATE_SEND_DATA;
break;
}
if( SyncCode( p_header ) != VLC_SUCCESS )
{
msg_Dbg( p_dec, "emulated sync word "
"(no sync on following frame): %2.2x%2.2x%2.2x%2.2x",
(int)p_header[0], (int)p_header[1],
(int)p_header[2], (int)p_header[3] );
p_sys->i_state = STATE_NOSYNC;
block_SkipByte( &p_sys->bytestream );
break;
}
p_sys->i_state = STATE_SEND_DATA;
break;
case STATE_GET_DATA:
/* Make sure we have enough data.
* (Not useful if we went through NEXT_SYNC) */
if( block_WaitBytes( &p_sys->bytestream,
p_sys->i_frame_size ) != VLC_SUCCESS )
{
/* Need more data */
return NULL;
}
p_sys->i_state = STATE_SEND_DATA;
case STATE_SEND_DATA:
if( p_sys->b_dts_hd )
{
/* Ignore DTS-HD */
block_SkipBytes( &p_sys->bytestream, p_sys->i_frame_size );
p_sys->i_state = STATE_NOSYNC;
break;
}
if( !(p_buf = GetOutBuffer( p_dec, &p_out_buffer )) )
{
//p_dec->b_error = true;
return NULL;
}
/* Copy the whole frame into the buffer. When we reach this point
* we already know we have enough data available. */
block_GetBytes( &p_sys->bytestream,
p_buf, __MIN( p_sys->i_frame_size, p_out_buffer->i_buffer ) );
/* Make sure we don't reuse the same pts twice */
if( p_sys->i_pts == p_sys->bytestream.p_block->i_pts )
p_sys->i_pts = p_sys->bytestream.p_block->i_pts = VLC_TS_INVALID;
p_sys->i_state = STATE_NOSYNC;
/* So p_block doesn't get re-added several times */
*pp_block = block_BytestreamPop( &p_sys->bytestream );
return p_out_buffer;
}
}
return NULL;
}
/*****************************************************************************
* CloseCommon: clean up the decoder
*****************************************************************************/
static void CloseCommon( vlc_object_t *p_this )
{
decoder_t *p_dec = (decoder_t*)p_this;
decoder_sys_t *p_sys = p_dec->p_sys;
block_BytestreamRelease( &p_sys->bytestream );
free( p_sys );
}
/*****************************************************************************
* GetOutBuffer:
*****************************************************************************/
static uint8_t *GetOutBuffer( decoder_t *p_dec, block_t **pp_out_buffer )
{
decoder_sys_t *p_sys = p_dec->p_sys;
uint8_t *p_buf;
if( p_dec->fmt_out.audio.i_rate != p_sys->i_rate )
{
msg_Info( p_dec, "DTS channels:%d samplerate:%d bitrate:%d",
p_sys->i_channels, p_sys->i_rate, p_sys->i_bit_rate );
date_Init( &p_sys->end_date, p_sys->i_rate, 1 );
date_Set( &p_sys->end_date, p_sys->i_pts );
}
p_dec->fmt_out.audio.i_rate = p_sys->i_rate;
p_dec->fmt_out.audio.i_channels = p_sys->i_channels;
/* Hack for DTS S/PDIF filter which needs to pad the DTS frames */
p_dec->fmt_out.audio.i_bytes_per_frame =
__MAX( p_sys->i_frame_size, p_sys->i_frame_length * 4 );
p_dec->fmt_out.audio.i_frame_length = p_sys->i_frame_length;
p_dec->fmt_out.audio.i_original_channels = p_sys->i_channels_conf;
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 = decoder_NewAudioBuffer( 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_buffer = p_sys->i_frame_size;
p_buf->i_pts = date_Get( &p_sys->end_date );
p_buf->i_length = date_Increment( &p_sys->end_date, p_sys->i_frame_length )
- p_buf->i_pts;
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 = date_Get( &p_sys->end_date );
p_block->i_length = date_Increment( &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;
}
/* DTS-HD */
else if( p_buf[0] == 0x64 && p_buf[1] == 0x58 &&
p_buf[2] == 0x20 && p_buf[3] == 0x25 )
{
return VLC_SUCCESS;
}
return VLC_EGENERIC;
}
static int SyncInfo( const uint8_t *p_buf,
bool *pb_dts_hd,
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 );
}
/* DTS-HD */
else
{
assert( p_buf[0] == 0x64 && p_buf[1] == 0x58 &&
p_buf[2] == 0x20 && p_buf[3] == 0x25 );
int i_dts_hd_size;
bs_t s;
bs_init( &s, &p_buf[4], DTS_HEADER_SIZE - 4 );
bs_skip( &s, 8 + 2 );
if( bs_read1( &s ) )
{
bs_skip( &s, 12 );
i_dts_hd_size = bs_read( &s, 20 ) + 1;
}
else
{
bs_skip( &s, 8 );
i_dts_hd_size = bs_read( &s, 16 ) + 1;
}
//uint16_t s0 = bs_read( &s, 16 );
//uint16_t s1 = bs_read( &s, 16 );
//fprintf( stderr, "DTS HD=%d : %x %x\n", i_dts_hd_size, s0, s1 );
*pb_dts_hd = true;
/* As we ignore the stream, do not modify those variables:
*pi_channels = ;
*pi_channels_conf = ;
*pi_sample_rate = ;
*pi_bit_rate = ;
*pi_frame_length = ;
*/
return i_dts_hd_size;
}
*pb_dts_hd = false;
switch( i_audio_mode & 0xFFFF )
{
case 0x0:
/* Mono */
*pi_channels = 1;
*pi_channels_conf = AOUT_CHAN_CENTER;
break;
case 0x1:
/* Dual-mono = stereo + dual-mono */
*pi_channels = 2;
*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;
}