/*****************************************************************************
* common.c : audio output management of common data structures
*****************************************************************************
* Copyright (C) 2002-2007 VLC authors and VideoLAN
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <limits.h>
#include <assert.h>
#include <vlc_common.h>
#include <vlc_aout.h>
#include "aout_internal.h"
/*
* Formats management (internal and external)
*/
/*****************************************************************************
* aout_BitsPerSample : get the number of bits per sample
*****************************************************************************/
unsigned int aout_BitsPerSample( vlc_fourcc_t i_format )
{
switch( vlc_fourcc_GetCodec( AUDIO_ES, i_format ) )
{
case VLC_CODEC_U8:
case VLC_CODEC_S8:
case VLC_CODEC_ALAW:
case VLC_CODEC_MULAW:
return 8;
case VLC_CODEC_U16L:
case VLC_CODEC_S16L:
case VLC_CODEC_U16B:
case VLC_CODEC_S16B:
return 16;
case VLC_CODEC_U24L:
case VLC_CODEC_S24L:
case VLC_CODEC_U24B:
case VLC_CODEC_S24B:
return 24;
case VLC_CODEC_S24L32:
case VLC_CODEC_S24B32:
case VLC_CODEC_U32L:
case VLC_CODEC_U32B:
case VLC_CODEC_S32L:
case VLC_CODEC_S32B:
case VLC_CODEC_F32L:
case VLC_CODEC_F32B:
return 32;
case VLC_CODEC_F64L:
case VLC_CODEC_F64B:
return 64;
default:
/* For these formats the caller has to indicate the parameters
* by hand. */
return 0;
}
}
/*****************************************************************************
* aout_FormatPrepare : compute the number of bytes per frame & frame length
*****************************************************************************/
void aout_FormatPrepare( audio_sample_format_t * p_format )
{
unsigned i_channels = aout_FormatNbChannels( p_format );
if( i_channels > 0 )
p_format->i_channels = i_channels;
p_format->i_bitspersample = aout_BitsPerSample( p_format->i_format );
if( p_format->i_bitspersample > 0 )
{
p_format->i_bytes_per_frame = ( p_format->i_bitspersample / 8 )
* p_format->i_channels;
p_format->i_frame_length = 1;
}
}
/*****************************************************************************
* aout_FormatPrintChannels : print a channel in a human-readable form
*****************************************************************************/
const char * aout_FormatPrintChannels( const audio_sample_format_t * p_format )
{
if (p_format->channel_type == AUDIO_CHANNEL_TYPE_AMBISONICS)
return "Ambisonics";
/* AUDIO_CHANNEL_TYPE_BITMAP */
switch ( p_format->i_physical_channels )
{
case AOUT_CHAN_LEFT:
case AOUT_CHAN_RIGHT:
case AOUT_CHAN_CENTER:
if ( (p_format->i_physical_channels & AOUT_CHAN_CENTER)
|| (p_format->i_physical_channels
& (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT)) )
return "Mono";
else if ( p_format->i_physical_channels & AOUT_CHAN_LEFT )
return "Left";
return "Right";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT:
if ( p_format->i_chan_mode & AOUT_CHANMODE_DOLBYSTEREO )
return "Dolby";
else if ( p_format->i_chan_mode & AOUT_CHANMODE_DUALMONO )
return "Dual-mono";
else if ( p_format->i_physical_channels == AOUT_CHAN_CENTER )
return "Stereo/Mono";
else if ( !(p_format->i_physical_channels & AOUT_CHAN_RIGHT) )
return "Stereo/Left";
else if ( !(p_format->i_physical_channels & AOUT_CHAN_LEFT) )
return "Stereo/Right";
return "Stereo";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER:
return "3F";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARCENTER:
return "2F1R";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
| AOUT_CHAN_REARCENTER:
return "3F1R";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT:
return "2F2R";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
| AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT:
return "2F2M";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT:
return "3F2R";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
| AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT:
return "3F2M";
case AOUT_CHAN_CENTER | AOUT_CHAN_LFE:
if ( (p_format->i_physical_channels & AOUT_CHAN_CENTER)
|| (p_format->i_physical_channels
& (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT)) )
return "Mono/LFE";
else if ( p_format->i_physical_channels & AOUT_CHAN_LEFT )
return "Left/LFE";
return "Right/LFE";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_LFE:
if ( p_format->i_chan_mode & AOUT_CHANMODE_DOLBYSTEREO )
return "Dolby/LFE";
else if ( p_format->i_chan_mode & AOUT_CHANMODE_DUALMONO )
return "Dual-mono/LFE";
else if ( p_format->i_physical_channels == AOUT_CHAN_CENTER )
return "Mono/LFE";
else if ( !(p_format->i_physical_channels & AOUT_CHAN_RIGHT) )
return "Stereo/Left/LFE";
else if ( !(p_format->i_physical_channels & AOUT_CHAN_LEFT) )
return "Stereo/Right/LFE";
return "Stereo/LFE";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER | AOUT_CHAN_LFE:
return "3F/LFE";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARCENTER
| AOUT_CHAN_LFE:
return "2F1R/LFE";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
| AOUT_CHAN_REARCENTER | AOUT_CHAN_LFE:
return "3F1R/LFE";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE:
return "2F2R/LFE";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
| AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_LFE:
return "2F2M/LFE";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE:
return "3F2R/LFE";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_REARCENTER
| AOUT_CHAN_LFE:
return "3F3R/LFE";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
| AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_LFE:
return "3F2M/LFE";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_MIDDLELEFT
| AOUT_CHAN_MIDDLERIGHT:
return "2F2M2R";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_MIDDLELEFT
| AOUT_CHAN_MIDDLERIGHT:
return "3F2M2R";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_MIDDLELEFT
| AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_LFE:
return "3F2M2R/LFE";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
| AOUT_CHAN_REARCENTER | AOUT_CHAN_MIDDLELEFT
| AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_LFE:
return "3F2M1R/LFE";
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_REARCENTER
| AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_LFE:
return "3F2M3R/LFE";
}
return "Unknown-chan-mask";
}
#undef aout_FormatPrint
void aout_FormatPrint( vlc_object_t *obj, const char *psz_text,
const audio_sample_format_t *p_format )
{
msg_Dbg( obj, "%s '%4.4s' %d Hz %s frame=%u samples/%u bytes", psz_text,
(char *)&p_format->i_format, p_format->i_rate,
aout_FormatPrintChannels( p_format ),
p_format->i_frame_length, p_format->i_bytes_per_frame );
}
#undef aout_FormatsPrint
/**
* Prints two formats in a human-readable form
*/
void aout_FormatsPrint( vlc_object_t *obj, const char * psz_text,
const audio_sample_format_t * p_format1,
const audio_sample_format_t * p_format2 )
{
msg_Dbg( obj, "%s '%4.4s'->'%4.4s' %u Hz->%u Hz %s->%s",
psz_text,
(char *)&p_format1->i_format, (char *)&p_format2->i_format,
p_format1->i_rate, p_format2->i_rate,
aout_FormatPrintChannels( p_format1 ),
aout_FormatPrintChannels( p_format2 ) );
}
/*****************************************************************************
* aout_CheckChannelReorder : Check if we need to do some channel re-ordering
*****************************************************************************/
unsigned aout_CheckChannelReorder( const uint32_t *chans_in,
const uint32_t *chans_out,
uint32_t mask, uint8_t *restrict table )
{
static_assert(AOUT_CHAN_MAX <= (sizeof (mask) * CHAR_BIT), "Missing bits");
unsigned channels = 0;
if( chans_in == NULL )
chans_in = pi_vlc_chan_order_wg4;
if( chans_out == NULL )
chans_out = pi_vlc_chan_order_wg4;
for( unsigned i = 0; chans_in[i]; i++ )
{
const uint32_t chan = chans_in[i];
if( !(mask & chan) )
continue;
unsigned index = 0;
for( unsigned j = 0; chan != chans_out[j]; j++ )
if( mask & chans_out[j] )
index++;
table[channels++] = index;
}
for( unsigned i = 0; i < channels; i++ )
if( table[i] != i )
return channels;
return 0;
}
void aout_ChannelReorder( void *ptr, size_t bytes, uint8_t channels,
const uint8_t *restrict chans_table, vlc_fourcc_t fourcc )
{
if( unlikely(bytes == 0) )
return;
assert( channels != 0 );
/* The audio formats supported in audio output are inlined. For other
* formats (used in demuxers and muxers), memcpy() is used to avoid
* breaking type punning. */
#define REORDER_TYPE(type) \
do { \
const size_t frames = (bytes / sizeof (type)) / channels; \
type *buf = ptr; \
\
for( size_t i = 0; i < frames; i++ ) \
{ \
type tmp[AOUT_CHAN_MAX]; \
\
for( size_t j = 0; j < channels; j++ ) \
tmp[chans_table[j]] = buf[j]; \
memcpy( buf, tmp, sizeof (type) * channels ); \
buf += channels; \
} \
} while(0)
if( likely(channels <= AOUT_CHAN_MAX) )
{
switch( fourcc )
{
case VLC_CODEC_U8: REORDER_TYPE(uint8_t); return;
case VLC_CODEC_S16N: REORDER_TYPE(int16_t); return;
case VLC_CODEC_FL32: REORDER_TYPE(float); return;
case VLC_CODEC_S32N: REORDER_TYPE(int32_t); return;
case VLC_CODEC_FL64: REORDER_TYPE(double); return;
}
}
unsigned size = aout_BitsPerSample( fourcc ) / 8;
assert( size != 0 && size <= 8 );
const size_t frames = bytes / (size * channels);
unsigned char *buf = ptr;
for( size_t i = 0; i < frames; i++ )
{
unsigned char tmp[256 * 8];
for( size_t j = 0; j < channels; j++ )
memcpy( tmp + size * chans_table[j], buf + size * j, size );
memcpy( buf, tmp, size * channels );
buf += size * channels;
}
}
/**
* Interleaves audio samples within a block of samples.
* \param dst destination buffer for interleaved samples
* \param srcv source buffers (one per plane) of uninterleaved samples
* \param samples number of samples (per channel/per plane)
* \param chans channels/planes count
* \param fourcc sample format (must be a linear sample format)
* \note The samples must be naturally aligned in memory.
* \warning Destination and source buffers MUST NOT overlap.
*/
void aout_Interleave( void *restrict dst, const void *const *srcv,
unsigned samples, unsigned chans, vlc_fourcc_t fourcc )
{
#define INTERLEAVE_TYPE(type) \
do { \
type *d = dst; \
for( size_t i = 0; i < chans; i++ ) { \
const type *s = srcv[i]; \
for( size_t j = 0, k = 0; j < samples; j++, k += chans ) \
d[k] = *(s++); \
d++; \
} \
} while(0)
switch( fourcc )
{
case VLC_CODEC_U8: INTERLEAVE_TYPE(uint8_t); break;
case VLC_CODEC_S16N: INTERLEAVE_TYPE(int16_t); break;
case VLC_CODEC_FL32: INTERLEAVE_TYPE(float); break;
case VLC_CODEC_S32N: INTERLEAVE_TYPE(int32_t); break;
case VLC_CODEC_FL64: INTERLEAVE_TYPE(double); break;
default: vlc_assert_unreachable();
}
#undef INTERLEAVE_TYPE
}
/**
* Deinterleaves audio samples within a block of samples.
* \param dst destination buffer for planar samples
* \param src source buffer with interleaved samples
* \param samples number of samples (per channel/per plane)
* \param chans channels/planes count
* \param fourcc sample format (must be a linear sample format)
* \note The samples must be naturally aligned in memory.
* \warning Destination and source buffers MUST NOT overlap.
*/
void aout_Deinterleave( void *restrict dst, const void *restrict src,
unsigned samples, unsigned chans, vlc_fourcc_t fourcc )
{
#define DEINTERLEAVE_TYPE(type) \
do { \
type *d = dst; \
const type *s = src; \
for( size_t i = 0; i < chans; i++ ) { \
for( size_t j = 0, k = 0; j < samples; j++, k += chans ) \
*(d++) = s[k]; \
s++; \
} \
} while(0)
switch( fourcc )
{
case VLC_CODEC_U8: DEINTERLEAVE_TYPE(uint8_t); break;
case VLC_CODEC_S16N: DEINTERLEAVE_TYPE(int16_t); break;
case VLC_CODEC_FL32: DEINTERLEAVE_TYPE(float); break;
case VLC_CODEC_S32N: DEINTERLEAVE_TYPE(int32_t); break;
case VLC_CODEC_FL64: DEINTERLEAVE_TYPE(double); break;
default: vlc_assert_unreachable();
}
#undef DEINTERLEAVE_TYPE
}
/*****************************************************************************
* aout_ChannelExtract:
*****************************************************************************/
static inline void ExtractChannel( uint8_t *pi_dst, int i_dst_channels,
const uint8_t *pi_src, int i_src_channels,
int i_sample_count,
const int *pi_selection, int i_bytes )
{
for( int i = 0; i < i_sample_count; i++ )
{
for( int j = 0; j < i_dst_channels; j++ )
memcpy( &pi_dst[j * i_bytes], &pi_src[pi_selection[j] * i_bytes], i_bytes );
pi_dst += i_dst_channels * i_bytes;
pi_src += i_src_channels * i_bytes;
}
}
void aout_ChannelExtract( void *p_dst, int i_dst_channels,
const void *p_src, int i_src_channels,
int i_sample_count, const int *pi_selection, int i_bits_per_sample )
{
/* It does not work in place */
assert( p_dst != p_src );
/* Force the compiler to inline for the specific cases so it can optimize */
if( i_bits_per_sample == 8 )
ExtractChannel( p_dst, i_dst_channels, p_src, i_src_channels, i_sample_count, pi_selection, 1 );
else if( i_bits_per_sample == 16 )
ExtractChannel( p_dst, i_dst_channels, p_src, i_src_channels, i_sample_count, pi_selection, 2 );
else if( i_bits_per_sample == 32 )
ExtractChannel( p_dst, i_dst_channels, p_src, i_src_channels, i_sample_count, pi_selection, 4 );
else if( i_bits_per_sample == 64 )
ExtractChannel( p_dst, i_dst_channels, p_src, i_src_channels, i_sample_count, pi_selection, 8 );
}
bool aout_CheckChannelExtraction( int *pi_selection,
uint32_t *pi_layout, int *pi_channels,
const uint32_t pi_order_dst[AOUT_CHAN_MAX],
const uint32_t *pi_order_src, int i_channels )
{
static_assert(AOUT_CHAN_MAX <= (sizeof (*pi_order_dst) * CHAR_BIT),
"Missing bits");
uint32_t i_layout = 0;
int i_out = 0;
int pi_index[AOUT_CHAN_MAX];
/* */
if( !pi_order_dst )
pi_order_dst = pi_vlc_chan_order_wg4;
/* */
for( int i = 0; i < i_channels; i++ )
{
/* Ignore unknown or duplicated channels or not present in output */
if( !pi_order_src[i] || (i_layout & pi_order_src[i]) )
continue;
for( int j = 0; j < AOUT_CHAN_MAX; j++ )
{
if( pi_order_dst[j] == pi_order_src[i] )
{
assert( i_out < AOUT_CHAN_MAX );
pi_index[i_out++] = i;
i_layout |= pi_order_src[i];
break;
}
}
}
/* */
for( int i = 0, j = 0; i < AOUT_CHAN_MAX; i++ )
{
for( int k = 0; k < i_out; k++ )
{
if( pi_order_dst[i] == pi_order_src[pi_index[k]] )
{
pi_selection[j++] = pi_index[k];
break;
}
}
}
*pi_layout = i_layout;
*pi_channels = i_out;
for( int i = 0; i < i_out; i++ )
{
if( pi_selection[i] != i )
return true;
}
return i_out != i_channels;
}
/* Return the order in which filters should be inserted */
static int FilterOrder( const char *psz_name )
{
static const struct {
const char psz_name[10];
int i_order;
} filter[] = {
{ "equalizer", 0 },
};
for( unsigned i = 0; i < ARRAY_SIZE(filter); i++ )
{
if( !strcmp( filter[i].psz_name, psz_name ) )
return filter[i].i_order;
}
return INT_MAX;
}
int aout_EnableFilter( audio_output_t *p_aout, const char *psz_name, bool b_add )
{
if( *psz_name == '\0' )
return VLC_EGENERIC;
const char *psz_variable = "audio-filter";
char *psz_list;
psz_list = var_GetString( p_aout, psz_variable );
/* Split the string into an array of filters */
int i_count = 1;
for( char *p = psz_list; p && *p; p++ )
i_count += *p == ':';
i_count += b_add;
const char **ppsz_filter = calloc( i_count, sizeof(*ppsz_filter) );
if( !ppsz_filter )
{
free( psz_list );
return VLC_ENOMEM;
}
bool b_present = false;
i_count = 0;
for( char *p = psz_list; p && *p; )
{
char *psz_end = strchr(p, ':');
if( psz_end )
*psz_end++ = '\0';
else
psz_end = p + strlen(p);
if( *p )
{
b_present |= !strcmp( p, psz_name );
ppsz_filter[i_count++] = p;
}
p = psz_end;
}
if( b_present == b_add )
{
free( ppsz_filter );
free( psz_list );
return VLC_EGENERIC;
}
if( b_add )
{
int i_order = FilterOrder( psz_name );
int i;
for( i = 0; i < i_count; i++ )
{
if( FilterOrder( ppsz_filter[i] ) > i_order )
break;
}
if( i < i_count )
memmove( &ppsz_filter[i+1], &ppsz_filter[i], (i_count - i) * sizeof(*ppsz_filter) );
ppsz_filter[i] = psz_name;
i_count++;
}
else
{
for( int i = 0; i < i_count; i++ )
{
if( !strcmp( ppsz_filter[i], psz_name ) )
ppsz_filter[i] = "";
}
}
size_t i_length = 0;
for( int i = 0; i < i_count; i++ )
i_length += 1 + strlen( ppsz_filter[i] );
char *psz_new = malloc( i_length + 1 );
if( unlikely( !psz_new ) )
{
free( ppsz_filter );
free( psz_list );
return VLC_ENOMEM;
}
*psz_new = '\0';
for( int i = 0; i < i_count; i++ )
{
if( *ppsz_filter[i] == '\0' )
continue;
if( *psz_new )
strcat( psz_new, ":" );
strcat( psz_new, ppsz_filter[i] );
}
free( ppsz_filter );
free( psz_list );
var_SetString( p_aout, psz_variable, psz_new );
free( psz_new );
return VLC_SUCCESS;
}
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