Commit 03eb53da authored by Thomas Guillem's avatar Thomas Guillem

mpeg_audio: reorder code

In order to avoid forward declarations.
parent a53ff378
......@@ -87,20 +87,9 @@ struct decoder_sys_t
#ifdef HAVE_MPGA_FILTER
static int OpenDecoder ( vlc_object_t * );
static block_t *GetAoutBuffer( decoder_t * );
#endif
static int Open( vlc_object_t * );
static block_t *DecodeBlock ( decoder_t *, block_t ** );
static void Flush( decoder_t * );
static uint8_t *GetOutBuffer ( decoder_t *, block_t ** );
static block_t *GetSoutBuffer( decoder_t * );
static void Close( vlc_object_t * );
static int SyncInfo( uint32_t i_header, 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 * pi_max_frame_size,
unsigned int * pi_layer );
/*****************************************************************************
* Module descriptor
......@@ -120,177 +109,332 @@ vlc_module_begin ()
vlc_module_end ()
/*****************************************************************************
* Open: probe the decoder and return score
* Flush:
*****************************************************************************/
static int Open( vlc_object_t *p_this )
static void Flush( decoder_t *p_dec )
{
decoder_t *p_dec = (decoder_t*)p_this;
decoder_sys_t *p_sys;
if(( p_dec->fmt_in.i_codec != VLC_CODEC_MPGA ) &&
( p_dec->fmt_in.i_codec != VLC_CODEC_MP3 ) )
{
return VLC_EGENERIC;
}
/* Allocate the memory needed to store the decoder's structure */
if( ( p_dec->p_sys = p_sys =
(decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
return VLC_ENOMEM;
decoder_sys_t *p_sys = p_dec->p_sys;
/* Misc init */
#ifdef HAVE_MPGA_FILTER
p_sys->b_packetizer = true;
#endif
p_sys->i_state = STATE_NOSYNC;
date_Set( &p_sys->end_date, 0 );
block_BytestreamInit( &p_sys->bytestream );
p_sys->i_pts = VLC_TS_INVALID;
p_sys->b_discontinuity = false;
p_sys->i_frame_size = 0;
p_sys->i_channels_conf = p_sys->i_channels = p_sys->i_rate =
p_sys->i_max_frame_size = p_sys->i_frame_length = p_sys->i_layer =
p_sys->i_bit_rate = 0;
/* Set output properties */
p_dec->fmt_out.i_cat = AUDIO_ES;
p_dec->fmt_out.i_codec = VLC_CODEC_MPGA;
p_dec->fmt_out.audio.i_rate = 0; /* So end_date gets initialized */
/* Set callback */
p_dec->pf_decode_audio = DecodeBlock;
p_dec->pf_packetize = DecodeBlock;
p_dec->pf_flush = Flush;
/* Start with the minimum size for a free bitrate frame */
p_sys->i_free_frame_size = MPGA_HEADER_SIZE;
return VLC_SUCCESS;
p_sys->i_state = STATE_NOSYNC;
block_BytestreamEmpty( &p_sys->bytestream );
p_sys->b_discontinuity = true;
}
#ifdef HAVE_MPGA_FILTER
static int OpenDecoder( vlc_object_t *p_this )
/*****************************************************************************
* GetAoutBuffer:
*****************************************************************************/
static block_t *GetAoutBuffer( decoder_t *p_dec )
{
decoder_t *p_dec = (decoder_t *)p_this;
decoder_sys_t *p_sys = p_dec->p_sys;
block_t *p_buf;
/* HACK: Don't use this codec if we don't have an mpga audio filter */
if( !module_exists( "mad" ) )
return VLC_EGENERIC;
if( decoder_UpdateAudioFormat( p_dec ) )
return NULL;
p_buf = decoder_NewAudioBuffer( p_dec, p_sys->i_frame_length );
if( p_buf == NULL ) return NULL;
int i_ret = Open( p_this );
if( i_ret != VLC_SUCCESS )
return i_ret;
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;
if( p_sys->b_discontinuity )
p_buf->i_flags |= BLOCK_FLAG_DISCONTINUITY;
p_sys->b_discontinuity = false;
p_dec->p_sys->b_packetizer = false;
return VLC_SUCCESS;
/* Hack for libmad filter */
p_buf = block_Realloc( p_buf, 0, p_sys->i_frame_size + MAD_BUFFER_GUARD );
return p_buf;
}
#endif
/*****************************************************************************
* Flush:
* GetSoutBuffer:
*****************************************************************************/
static void Flush( decoder_t *p_dec )
static block_t *GetSoutBuffer( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
block_t *p_block;
date_Set( &p_sys->end_date, 0 );
p_sys->i_state = STATE_NOSYNC;
block_BytestreamEmpty( &p_sys->bytestream );
p_sys->b_discontinuity = true;
p_block = block_Alloc( 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;
}
/****************************************************************************
* DecodeBlock: the whole thing
****************************************************************************
* This function is called just after the thread is launched.
****************************************************************************/
static block_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
/*****************************************************************************
* 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_header[MAD_BUFFER_GUARD];
uint32_t i_header;
uint8_t *p_buf;
block_t *p_out_buffer;
block_t *p_block = pp_block ? *pp_block : NULL;
if (p_block)
if( p_dec->fmt_out.audio.i_rate != p_sys->i_rate )
{
if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
{
if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
{
Flush( p_dec );
block_Release( p_block );
*pp_block = NULL;
return NULL;
}
else /* BLOCK_FLAG_DISCONTINUITY */
date_Set( &p_sys->end_date, 0 );
p_sys->b_discontinuity = true;
}
msg_Dbg( p_dec, "MPGA channels:%d samplerate:%d bitrate:%d",
p_sys->i_channels, p_sys->i_rate, p_sys->i_bit_rate );
if( !date_Get( &p_sys->end_date ) && p_block->i_pts <= VLC_TS_INVALID )
{
/* We've just started the stream, wait for the first PTS. */
msg_Dbg( p_dec, "waiting for PTS" );
block_Release( p_block );
return NULL;
}
date_Init( &p_sys->end_date, p_sys->i_rate, 1 );
date_Set( &p_sys->end_date, p_sys->i_pts );
}
block_BytestreamPush( &p_sys->bytestream, p_block );
} else if (p_sys->i_frame_size)
p_sys->i_state = STATE_SEND_DATA; /* return all the data we have left */
p_dec->fmt_out.audio.i_rate = p_sys->i_rate;
p_dec->fmt_out.audio.i_channels = p_sys->i_channels;
p_dec->fmt_out.audio.i_frame_length = p_sys->i_frame_length;
p_dec->fmt_out.audio.i_bytes_per_frame =
p_sys->i_max_frame_size + MAD_BUFFER_GUARD;
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 * 1000;
#ifdef HAVE_MPGA_FILTER
if( !p_sys->b_packetizer )
{
block_t *p_aout_buffer = GetAoutBuffer( p_dec );
p_buf = p_aout_buffer ? p_aout_buffer->p_buffer : NULL;
*pp_out_buffer = p_aout_buffer;
}
else
return NULL;
#endif
{
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;
}
return p_buf;
}
while( 1 )
/*****************************************************************************
* SyncInfo: parse MPEG audio sync info
*****************************************************************************/
static int SyncInfo( uint32_t i_header, 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 * pi_max_frame_size, unsigned int * pi_layer)
{
static const int ppi_bitrate[2][3][16] =
{
switch( p_sys->i_state )
{
/* v1 l1 */
{ 0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384,
416, 448, 0},
/* v1 l2 */
{ 0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256,
320, 384, 0},
/* v1 l3 */
{ 0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224,
256, 320, 0}
},
case STATE_NOSYNC:
while( block_PeekBytes( &p_sys->bytestream, p_header, 2 )
== VLC_SUCCESS )
{
/* Look for sync word - should be 0xffe */
if( p_header[0] == 0xff && (p_header[1] & 0xe0) == 0xe0 )
{
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;
}
{
/* v2 l1 */
{ 0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192,
224, 256, 0},
/* v2 l2 */
{ 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128,
144, 160, 0},
/* v2 l3 */
{ 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128,
144, 160, 0}
}
};
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;
static const int ppi_samplerate[2][4] = /* version 1 then 2 */
{
{ 44100, 48000, 32000, 0 },
{ 22050, 24000, 16000, 0 }
};
case STATE_HEADER:
/* Get MPGA frame header (MPGA_HEADER_SIZE bytes) */
if( block_PeekBytes( &p_sys->bytestream, p_header,
MPGA_HEADER_SIZE ) != VLC_SUCCESS )
{
/* Need more data */
return NULL;
}
int i_version, i_mode, i_emphasis;
bool b_padding, b_mpeg_2_5;
int i_frame_size = 0;
int i_bitrate_index, i_samplerate_index;
int i_max_bit_rate;
/* Build frame header */
i_header = GetDWBE(p_header);
b_mpeg_2_5 = 1 - ((i_header & 0x100000) >> 20);
i_version = 1 - ((i_header & 0x80000) >> 19);
*pi_layer = 4 - ((i_header & 0x60000) >> 17);
//bool b_crc = !((i_header >> 16) & 0x01);
i_bitrate_index = (i_header & 0xf000) >> 12;
i_samplerate_index = (i_header & 0xc00) >> 10;
b_padding = (i_header & 0x200) >> 9;
/* Extension */
i_mode = (i_header & 0xc0) >> 6;
/* Modeext, copyright & original */
i_emphasis = i_header & 0x3;
if( *pi_layer != 4 &&
i_bitrate_index < 0x0f &&
i_samplerate_index != 0x03 &&
i_emphasis != 0x02 )
{
switch ( i_mode )
{
case 0: /* stereo */
case 1: /* joint stereo */
*pi_channels = 2;
*pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
break;
case 2: /* dual-mono */
*pi_channels = 2;
*pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
| AOUT_CHAN_DUALMONO;
break;
case 3: /* mono */
*pi_channels = 1;
*pi_channels_conf = AOUT_CHAN_CENTER;
break;
}
*pi_bit_rate = ppi_bitrate[i_version][*pi_layer-1][i_bitrate_index];
i_max_bit_rate = ppi_bitrate[i_version][*pi_layer-1][14];
*pi_sample_rate = ppi_samplerate[i_version][i_samplerate_index];
if ( b_mpeg_2_5 )
{
*pi_sample_rate >>= 1;
}
switch( *pi_layer )
{
case 1:
i_frame_size = ( 12000 * *pi_bit_rate / *pi_sample_rate +
b_padding ) * 4;
*pi_max_frame_size = ( 12000 * i_max_bit_rate /
*pi_sample_rate + 1 ) * 4;
*pi_frame_length = 384;
break;
case 2:
i_frame_size = 144000 * *pi_bit_rate / *pi_sample_rate + b_padding;
*pi_max_frame_size = 144000 * i_max_bit_rate / *pi_sample_rate + 1;
*pi_frame_length = 1152;
break;
case 3:
i_frame_size = ( i_version ? 72000 : 144000 ) *
*pi_bit_rate / *pi_sample_rate + b_padding;
*pi_max_frame_size = ( i_version ? 72000 : 144000 ) *
i_max_bit_rate / *pi_sample_rate + 1;
*pi_frame_length = i_version ? 576 : 1152;
break;
default:
break;
}
/* Free bitrate mode can support higher bitrates */
if( !*pi_bit_rate ) *pi_max_frame_size *= 2;
}
else
{
return -1;
}
return i_frame_size;
}
/****************************************************************************
* DecodeBlock: the whole thing
****************************************************************************
* This function is called just after the thread is launched.
****************************************************************************/
static block_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
uint8_t p_header[MAD_BUFFER_GUARD];
uint32_t i_header;
uint8_t *p_buf;
block_t *p_out_buffer;
block_t *p_block = pp_block ? *pp_block : NULL;
if (p_block)
{
if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
{
if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
{
Flush( p_dec );
block_Release( p_block );
*pp_block = NULL;
return NULL;
}
else /* BLOCK_FLAG_DISCONTINUITY */
date_Set( &p_sys->end_date, 0 );
p_sys->b_discontinuity = true;
}
if( !date_Get( &p_sys->end_date ) && p_block->i_pts <= VLC_TS_INVALID )
{
/* We've just started the stream, wait for the first PTS. */
msg_Dbg( p_dec, "waiting for PTS" );
block_Release( p_block );
return NULL;
}
block_BytestreamPush( &p_sys->bytestream, p_block );
} else if (p_sys->i_frame_size)
p_sys->i_state = STATE_SEND_DATA; /* return all the data we have left */
else
return NULL;
while( 1 )
{
switch( p_sys->i_state )
{
case STATE_NOSYNC:
while( block_PeekBytes( &p_sys->bytestream, p_header, 2 )
== VLC_SUCCESS )
{
/* Look for sync word - should be 0xffe */
if( p_header[0] == 0xff && (p_header[1] & 0xe0) == 0xe0 )
{
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 MPGA frame header (MPGA_HEADER_SIZE bytes) */
if( block_PeekBytes( &p_sys->bytestream, p_header,
MPGA_HEADER_SIZE ) != VLC_SUCCESS )
{
/* Need more data */
return NULL;
}
/* Build frame header */
i_header = GetDWBE(p_header);
/* Check if frame is valid and get frame info */
p_sys->i_frame_size = SyncInfo( i_header,
......@@ -508,99 +652,6 @@ static block_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
return NULL;
}
/*****************************************************************************
* 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_Dbg( p_dec, "MPGA 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;
p_dec->fmt_out.audio.i_frame_length = p_sys->i_frame_length;
p_dec->fmt_out.audio.i_bytes_per_frame =
p_sys->i_max_frame_size + MAD_BUFFER_GUARD;
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 * 1000;
#ifdef HAVE_MPGA_FILTER
if( !p_sys->b_packetizer )
{
block_t *p_aout_buffer = GetAoutBuffer( p_dec );
p_buf = p_aout_buffer ? p_aout_buffer->p_buffer : NULL;
*pp_out_buffer = p_aout_buffer;
}
else
#endif
{
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;
}
return p_buf;
}
#ifdef HAVE_MPGA_FILTER
/*****************************************************************************
* GetAoutBuffer:
*****************************************************************************/
static block_t *GetAoutBuffer( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
block_t *p_buf;
if( decoder_UpdateAudioFormat( p_dec ) )
return NULL;
p_buf = decoder_NewAudioBuffer( p_dec, p_sys->i_frame_length );
if( p_buf == NULL ) return NULL;
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;
if( p_sys->b_discontinuity )
p_buf->i_flags |= BLOCK_FLAG_DISCONTINUITY;
p_sys->b_discontinuity = false;
/* Hack for libmad filter */
p_buf = block_Realloc( p_buf, 0, p_sys->i_frame_size + MAD_BUFFER_GUARD );
return p_buf;
}
#endif
/*****************************************************************************
* 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_Alloc( 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;
}
/*****************************************************************************
* Close: clean up the decoder
*****************************************************************************/
......@@ -615,131 +666,69 @@ static void Close( vlc_object_t *p_this )
}
/*****************************************************************************
* SyncInfo: parse MPEG audio sync info
* Open: probe the decoder and return score
*****************************************************************************/
static int SyncInfo( uint32_t i_header, 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 * pi_max_frame_size, unsigned int * pi_layer)
static int Open( vlc_object_t *p_this )
{
static const int ppi_bitrate[2][3][16] =
{
{
/* v1 l1 */
{ 0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384,
416, 448, 0},
/* v1 l2 */
{ 0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256,
320, 384, 0},
/* v1 l3 */
{ 0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224,
256, 320, 0}
},
{
/* v2 l1 */
{ 0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192,
224, 256, 0},
/* v2 l2 */
{ 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128,
144, 160, 0},
/* v2 l3 */
{ 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128,
144, 160, 0}
}
};
decoder_t *p_dec = (decoder_t*)p_this;
decoder_sys_t *p_sys;
static const int ppi_samplerate[2][4] = /* version 1 then 2 */
if(( p_dec->fmt_in.i_codec != VLC_CODEC_MPGA ) &&
( p_dec->fmt_in.i_codec != VLC_CODEC_MP3 ) )
{
{ 44100, 48000, 32000, 0 },
{ 22050, 24000, 16000, 0 }
};
return VLC_EGENERIC;
}
int i_version, i_mode, i_emphasis;
bool b_padding, b_mpeg_2_5;
int i_frame_size = 0;
int i_bitrate_index, i_samplerate_index;
int i_max_bit_rate;
/* Allocate the memory needed to store the decoder's structure */
if( ( p_dec->p_sys = p_sys =
(decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
return VLC_ENOMEM;
b_mpeg_2_5 = 1 - ((i_header & 0x100000) >> 20);
i_version = 1 - ((i_header & 0x80000) >> 19);
*pi_layer = 4 - ((i_header & 0x60000) >> 17);
//bool b_crc = !((i_header >> 16) & 0x01);
i_bitrate_index = (i_header & 0xf000) >> 12;
i_samplerate_index = (i_header & 0xc00) >> 10;
b_padding = (i_header & 0x200) >> 9;
/* Extension */
i_mode = (i_header & 0xc0) >> 6;
/* Modeext, copyright & original */
i_emphasis = i_header & 0x3;
/* Misc init */
#ifdef HAVE_MPGA_FILTER
p_sys->b_packetizer = true;
#endif
p_sys->i_state = STATE_NOSYNC;
date_Set( &p_sys->end_date, 0 );
block_BytestreamInit( &p_sys->bytestream );
p_sys->i_pts = VLC_TS_INVALID;
p_sys->b_discontinuity = false;
p_sys->i_frame_size = 0;
if( *pi_layer != 4 &&
i_bitrate_index < 0x0f &&
i_samplerate_index != 0x03 &&
i_emphasis != 0x02 )
{
switch ( i_mode )
{
case 0: /* stereo */
case 1: /* joint stereo */
*pi_channels = 2;
*pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
break;
case 2: /* dual-mono */
*pi_channels = 2;
*pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
| AOUT_CHAN_DUALMONO;
break;
case 3: /* mono */
*pi_channels = 1;
*pi_channels_conf = AOUT_CHAN_CENTER;
break;
}
*pi_bit_rate = ppi_bitrate[i_version][*pi_layer-1][i_bitrate_index];
i_max_bit_rate = ppi_bitrate[i_version][*pi_layer-1][14];
*pi_sample_rate = ppi_samplerate[i_version][i_samplerate_index];
p_sys->i_channels_conf = p_sys->i_channels = p_sys->i_rate =
p_sys->i_max_frame_size = p_sys->i_frame_length = p_sys->i_layer =
p_sys->i_bit_rate = 0;
if ( b_mpeg_2_5 )
{
*pi_sample_rate >>= 1;
}
/* Set output properties */
p_dec->fmt_out.i_cat = AUDIO_ES;
p_dec->fmt_out.i_codec = VLC_CODEC_MPGA;
p_dec->fmt_out.audio.i_rate = 0; /* So end_date gets initialized */
switch( *pi_layer )
{
case 1:
i_frame_size = ( 12000 * *pi_bit_rate / *pi_sample_rate +
b_padding ) * 4;
*pi_max_frame_size = ( 12000 * i_max_bit_rate /
*pi_sample_rate + 1 ) * 4;
*pi_frame_length = 384;
break;
/* Set callback */