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Commit 3fc985ff authored by Laurent Aimar's avatar Laurent Aimar
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Added support of BD LPCM (using fcc bpcm)

parent 136ba664
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Showing with 297 additions and 138 deletions
modules/codec/lpcm.c
View file @ 3fc985ff
......@@ -8,6 +8,7 @@
* Henri Fallon <henri@videolan.org>
* Christophe Massiot <massiot@via.ecp.fr>
* Gildas Bazin <gbazin@videolan.org>
* Lauren Aimar <fenrir _AT_ videolan _DOT_ org >
*
* 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
......@@ -73,7 +74,8 @@ struct decoder_sys_t
audio_date_t end_date;
/* */
unsigned int i_header_size;
unsigned i_header_size;
bool b_dvd;
};
/*
......@@ -87,14 +89,34 @@ struct decoder_sys_t
* - unknown (1 bit)
* - number of channels - 1 (3 bits) 1 == 2 channels
* - start code (8 bits) == 0x80
*
* LPCM BD header :
* - unkown (16 bits)
* - number of channels (4 bits)
* - frequency (4 bits)
* - bits per sample (2 bits)
* - unknown (6 bits)
*/
#define LPCM_DVD_HEADER_LEN (6)
#define LPCM_BD_HEADER_LEN (4)
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static void *DecodeFrame ( decoder_t *, block_t ** );
static int DvdHeader( unsigned *pi_rate,
unsigned *pi_channels, unsigned *pi_original_channels,
unsigned *pi_bits,
const uint8_t *p_header );
static void DvdExtract( aout_buffer_t *, block_t *, unsigned i_bits );
static int BdHeader( unsigned *pi_rate,
unsigned *pi_channels, unsigned *pi_original_channels,
unsigned *pi_bits,
const uint8_t *p_header );
static void BdExtract( aout_buffer_t *, block_t * );
/*****************************************************************************
* OpenCommon:
......@@ -103,11 +125,18 @@ static int OpenCommon( vlc_object_t *p_this, bool b_packetizer )
{
decoder_t *p_dec = (decoder_t*)p_this;
decoder_sys_t *p_sys;
bool b_dvd;
switch( p_dec->fmt_in.i_codec )
{
/* DVD LPCM */
case VLC_FOURCC('l','p','c','m'):
case VLC_FOURCC('l','p','c','b'):
b_dvd = true;
break;
/* BD LPCM */
case VLC_FOURCC('b','p','c','m'):
b_dvd = false;
break;
default:
return VLC_EGENERIC;
......@@ -119,15 +148,16 @@ static int OpenCommon( vlc_object_t *p_this, bool b_packetizer )
/* Misc init */
p_sys->b_packetizer = b_packetizer;
p_sys->i_header_size = LPCM_DVD_HEADER_LEN;
aout_DateSet( &p_sys->end_date, 0 );
p_sys->i_header_size = b_dvd ? LPCM_DVD_HEADER_LEN : LPCM_BD_HEADER_LEN;
p_sys->b_dvd = b_dvd;
/* Set output properties */
p_dec->fmt_out.i_cat = AUDIO_ES;
if( b_packetizer )
{
p_dec->fmt_out.i_codec = VLC_FOURCC('l','p','c','m');
p_dec->fmt_out.i_codec = b_dvd ? VLC_FOURCC('l','p','c','m') : VLC_FOURCC('b','p','c','m');
}
else
{
......@@ -136,6 +166,7 @@ static int OpenCommon( vlc_object_t *p_this, bool b_packetizer )
case 24:
case 20:
p_dec->fmt_out.i_codec = VLC_FOURCC('s','2','4','b');
p_dec->fmt_out.audio.i_bitspersample = 24;
break;
default:
p_dec->fmt_out.i_codec = VLC_FOURCC('s','1','6','b');
......@@ -170,9 +201,8 @@ static void *DecodeFrame( decoder_t *p_dec, block_t **pp_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
block_t *p_block;
unsigned int i_rate = 0, i_original_channels = 0, i_channels = 0;
int i_frame_length, i_bitspersample;
uint8_t i_header;
unsigned int i_rate = 0, i_original_channels = 0, i_channels = 0, i_bits = 0;
int i_frame_length;
if( !pp_block || !*pp_block ) return NULL;
......@@ -200,137 +230,276 @@ static void *DecodeFrame( decoder_t *p_dec, block_t **pp_block )
return NULL;
}
i_header = p_block->p_buffer[4];
switch ( (i_header >> 4) & 0x3 )
int i_ret;
if( p_sys->b_dvd )
i_ret = DvdHeader( &i_rate, &i_channels, &i_original_channels, &i_bits,
p_block->p_buffer );
else
i_ret = BdHeader( &i_rate, &i_channels, &i_original_channels, &i_bits,
p_block->p_buffer );
if( i_ret )
{
msg_Warn( p_dec, "no frame sync" );
block_Release( p_block );
return NULL;
}
/* Set output properties */
if( p_dec->fmt_out.audio.i_rate != i_rate )
{
aout_DateInit( &p_sys->end_date, i_rate );
aout_DateSet( &p_sys->end_date, p_block->i_pts );
}
p_dec->fmt_out.audio.i_rate = i_rate;
p_dec->fmt_out.audio.i_channels = i_channels;
p_dec->fmt_out.audio.i_original_channels = i_original_channels;
p_dec->fmt_out.audio.i_physical_channels = i_original_channels & AOUT_CHAN_PHYSMASK;
i_frame_length = (p_block->i_buffer - p_sys->i_header_size) / i_channels * 8 / i_bits;
if( p_sys->b_packetizer )
{
p_block->i_pts = p_block->i_dts = aout_DateGet( &p_sys->end_date );
p_block->i_length =
aout_DateIncrement( &p_sys->end_date, i_frame_length ) -
p_block->i_pts;
/* Just pass on the incoming frame */
return p_block;
}
else
{
/* */
if( i_bits == 16 )
{
p_dec->fmt_out.i_codec = VLC_FOURCC('s','1','6','b');
p_dec->fmt_out.audio.i_bitspersample = 16;
}
else
{
p_dec->fmt_out.i_codec = VLC_FOURCC('s','2','4','b');
p_dec->fmt_out.audio.i_bitspersample = 24;
}
/* */
aout_buffer_t *p_aout_buffer;
p_aout_buffer = decoder_NewAudioBuffer( p_dec, i_frame_length );
if( !p_aout_buffer )
return NULL;
p_aout_buffer->start_date = aout_DateGet( &p_sys->end_date );
p_aout_buffer->end_date =
aout_DateIncrement( &p_sys->end_date, i_frame_length );
p_block->p_buffer += p_sys->i_header_size;
p_block->i_buffer -= p_sys->i_header_size;
if( p_sys->b_dvd )
DvdExtract( p_aout_buffer, p_block, i_bits );
else
BdExtract( p_aout_buffer, p_block );
block_Release( p_block );
return p_aout_buffer;
}
}
/*****************************************************************************
* CloseCommon : lpcm decoder destruction
*****************************************************************************/
static void CloseCommon( vlc_object_t *p_this )
{
decoder_t *p_dec = (decoder_t*)p_this;
free( p_dec->p_sys );
}
/*****************************************************************************
*
*****************************************************************************/
static int DvdHeader( unsigned *pi_rate,
unsigned *pi_channels, unsigned *pi_original_channels,
unsigned *pi_bits,
const uint8_t *p_header )
{
const uint8_t i_header = p_header[4];
switch( (i_header >> 4) & 0x3 )
{
case 0:
i_rate = 48000;
*pi_rate = 48000;
break;
case 1:
i_rate = 96000;
*pi_rate = 96000;
break;
case 2:
i_rate = 44100;
*pi_rate = 44100;
break;
case 3:
i_rate = 32000;
*pi_rate = 32000;
break;
}
i_channels = (i_header & 0x7);
switch ( i_channels )
*pi_channels = (i_header & 0x7) + 1;
switch( *pi_channels - 1 )
{
case 0:
i_original_channels = AOUT_CHAN_CENTER;
*pi_original_channels = AOUT_CHAN_CENTER;
break;
case 1:
i_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
*pi_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
break;
case 2:
/* This is unsure. */
i_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_LFE;
*pi_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_LFE;
break;
case 3:
i_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
*pi_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
break;
case 4:
/* This is unsure. */
i_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
*pi_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
| AOUT_CHAN_LFE;
break;
case 5:
i_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
*pi_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
| AOUT_CHAN_CENTER | AOUT_CHAN_LFE;
break;
case 6:
i_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
*pi_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
| AOUT_CHAN_CENTER | AOUT_CHAN_MIDDLELEFT
| AOUT_CHAN_MIDDLERIGHT;
break;
case 7:
i_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
*pi_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
| AOUT_CHAN_CENTER | AOUT_CHAN_MIDDLELEFT
| AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_LFE;
break;
}
switch ( (i_header >> 6) & 0x3 )
switch( (i_header >> 6) & 0x3 )
{
case 2:
p_dec->fmt_out.i_codec = VLC_FOURCC('s','2','4','b');
p_dec->fmt_out.audio.i_bitspersample = 24;
i_bitspersample = 24;
*pi_bits = 24;
break;
case 1:
p_dec->fmt_out.i_codec = VLC_FOURCC('s','2','4','b');
p_dec->fmt_out.audio.i_bitspersample = 24;
i_bitspersample = 20;
*pi_bits = 20;
break;
case 0:
default:
p_dec->fmt_out.i_codec = VLC_FOURCC('s','1','6','b');
p_dec->fmt_out.audio.i_bitspersample = 16;
i_bitspersample = 16;
*pi_bits = 16;
break;
}
/* Check frame sync and drop it. */
if( p_block->p_buffer[5] != 0x80 )
if( p_header[5] != 0x80 )
return -1;
return 0;
}
static int BdHeader( unsigned *pi_rate,
unsigned *pi_channels, unsigned *pi_original_channels,
unsigned *pi_bits,
const uint8_t *p_header )
{
const uint32_t h = GetDWBE( p_header );
switch( ( h & 0xf000) >> 12 )
{
msg_Warn( p_dec, "no frame sync" );
block_Release( p_block );
return NULL;
}
case 1:
*pi_channels = 1;
*pi_original_channels = AOUT_CHAN_CENTER;
break;
case 3:
*pi_channels = 2;
*pi_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
break;
case 4:
*pi_channels = 3;
*pi_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER;
break;
case 5:
*pi_channels = 3;
*pi_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARCENTER;
break;
case 6:
*pi_channels = 4;
*pi_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER |
AOUT_CHAN_REARCENTER;
break;
case 7:
*pi_channels = 4;
*pi_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
break;
case 8:
*pi_channels = 5;
*pi_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER |
AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
break;
case 9:
*pi_channels = 6;
*pi_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER |
AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT |
AOUT_CHAN_LFE;
break;
case 10:
*pi_channels = 7;
*pi_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER |
AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT |
AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT;
break;
case 11:
*pi_channels = 8;
*pi_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER |
AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT |
AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT |
AOUT_CHAN_LFE;
break;
/* Set output properties */
if( p_dec->fmt_out.audio.i_rate != i_rate )
{
aout_DateInit( &p_sys->end_date, i_rate );
aout_DateSet( &p_sys->end_date, p_block->i_pts );
default:
return -1;
}
p_dec->fmt_out.audio.i_rate = i_rate;
p_dec->fmt_out.audio.i_channels = i_channels + 1;
p_dec->fmt_out.audio.i_original_channels = i_original_channels;
p_dec->fmt_out.audio.i_physical_channels
= i_original_channels & AOUT_CHAN_PHYSMASK;
i_frame_length = (p_block->i_buffer - p_sys->i_header_size) /
p_dec->fmt_out.audio.i_channels * 8 / i_bitspersample;
if( p_sys->b_packetizer )
switch( (h >> 6) & 0x03 )
{
p_dec->fmt_out.i_codec = VLC_FOURCC('l','p','c','m');
p_block->i_pts = p_block->i_dts = aout_DateGet( &p_sys->end_date );
p_block->i_length =
aout_DateIncrement( &p_sys->end_date, i_frame_length ) -
p_block->i_pts;
/* Just pass on the incoming frame */
return p_block;
case 1:
*pi_bits = 16;
break;
case 2: /* 20 bits but samples are stored on 24 bits */
case 3: /* 24 bits */
*pi_bits = 24;
break;
default:
return -1;
}
else
switch( (h >> 8) & 0x0f )
{
aout_buffer_t *p_aout_buffer;
p_aout_buffer = decoder_NewAudioBuffer( p_dec, i_frame_length );
if( p_aout_buffer == NULL ) return NULL;
p_aout_buffer->start_date = aout_DateGet( &p_sys->end_date );
p_aout_buffer->end_date =
aout_DateIncrement( &p_sys->end_date, i_frame_length );
case 1:
*pi_rate = 48000;
break;
case 4:
*pi_rate = 96000;
break;
case 5:
*pi_rate = 192000;
break;
default:
return -1;
}
return 0;
}
p_block->p_buffer += p_sys->i_header_size;
p_block->i_buffer -= p_sys->i_header_size;
static void DvdExtract( aout_buffer_t *p_aout_buffer, block_t *p_block,
unsigned i_bits )
{
uint8_t *p_out = p_aout_buffer->p_buffer;
/* 20/24 bits LPCM use special packing */
if( i_bitspersample == 24 )
if( i_bits == 24 )
{
uint8_t *p_out = p_aout_buffer->p_buffer;
while( p_block->i_buffer / 12 )
{
/* Sample 1 */
......@@ -355,10 +524,8 @@ static void *DecodeFrame( decoder_t *p_dec, block_t **pp_block )
p_out += 12;
}
}
else if( i_bitspersample == 20 )
else if( i_bits == 20 )
{
uint8_t *p_out = p_aout_buffer->p_buffer;
while( p_block->i_buffer / 10 )
{
/* Sample 1 */
......@@ -385,21 +552,13 @@ static void *DecodeFrame( decoder_t *p_dec, block_t **pp_block )
}
else
{
memcpy( p_aout_buffer->p_buffer,
p_block->p_buffer, p_block->i_buffer );
}
block_Release( p_block );
return p_aout_buffer;
assert( i_bits == 16 );
memcpy( p_out, p_block->p_buffer, p_block->i_buffer );
}
}
/*****************************************************************************
* CloseCommon : lpcm decoder destruction
*****************************************************************************/
static void CloseCommon( vlc_object_t *p_this )
static void BdExtract( aout_buffer_t *p_aout_buffer, block_t *p_block )
{
decoder_t *p_dec = (decoder_t*)p_this;
free( p_dec->p_sys );
memcpy( p_aout_buffer->p_buffer, p_block->p_buffer, p_block->i_buffer );
}
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