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Commit 03f2c9e9 authored by Gildas Bazin's avatar Gildas Bazin
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* modules/audio_filter/converter/a52tofloat32.c,dtstofloat32.c: proper channel... 

* modules/audio_filter/converter/a52tofloat32.c,dtstofloat32.c: proper channel re-ordering using aout_ChannelReorder().
parent 754e4b92
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Showing with 43 additions and 69 deletions
modules/audio_filter/converter/a52tofloat32.c
View file @ 03f2c9e9
......@@ -65,6 +65,15 @@ static int OpenFilter ( vlc_object_t * );
static void CloseFilter( vlc_object_t * );
static block_t *Convert( filter_t *, block_t * );
/* liba52 channel order */
static const uint32_t pi_channels_in[] =
{ AOUT_CHAN_LFE, AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT,
AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, 0 };
/* our internal channel order (WG-4 order) */
static const uint32_t pi_channels_out[] =
{ AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
/*****************************************************************************
* Local structures
*****************************************************************************/
......@@ -75,6 +84,8 @@ struct filter_sys_t
int i_flags; /* liba52 flags, see a52dec/doc/liba52.txt */
vlc_bool_t b_dontwarn;
int i_nb_channels; /* number of float32 per sample */
int pi_chan_table[AOUT_CHAN_MAX]; /* channel reordering */
};
/*****************************************************************************
......@@ -239,52 +250,28 @@ static int Open( vlc_object_t *p_this, filter_sys_t *p_sys,
return VLC_EGENERIC;
}
aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
output.i_physical_channels & AOUT_CHAN_PHYSMASK,
p_sys->i_nb_channels,
p_sys->pi_chan_table );
return VLC_SUCCESS;
}
/*****************************************************************************
* Interleave: helper function to interleave channels
*****************************************************************************/
static void Interleave( float * p_out, const float * p_in, int i_nb_channels )
static void Interleave( float * p_out, const float * p_in, int i_nb_channels,
int *pi_chan_table )
{
/* We do not only have to interleave, but also reorder the channels
* Channel reordering according to number of output channels of libA52
* The reordering needs to be different for different channel configurations
* (3F2R, 1F2R etc), so this is only temporary.
* The WG-4 order is appropriate for stereo, quadrophonia, and 5.1 surround.
*
* 6 channel mode
* channel liba52 order WG-4 order
* 0 LFE // L
* 1 L // R
* 2 C // LS
* 3 R // RS
* 4 LS // C
* 5 RS // LFE
*
* The liba52 moves channels to the front if there are unused spaces, so
* there is no gap between channels. The translation table says which
* channel of the new stream is taken from which original channel [use
* the new channel as the array index, use the number you get from the
* array to address the original channel].
*/
static const int translation[7][6] =
{{ 0, 0, 0, 0, 0, 0 }, /* 0 channels (rarely used) */
{ 0, 0, 0, 0, 0, 0 }, /* 1 ch */
{ 0, 1, 0, 0, 0, 0 }, /* 2 */
{ 1, 2, 0, 0, 0, 0 }, /* 3 */
{ 1, 3, 2, 0, 0, 0 }, /* 4 */
{ 1, 3, 4, 2, 0, 0 }, /* 5 */
{ 1, 3, 4, 5, 2, 0 }}; /* 6 */
/* We do not only have to interleave, but also reorder the channels */
int i, j;
for ( j = 0; j < i_nb_channels; j++ )
{
for ( i = 0; i < 256; i++ )
{
p_out[i * i_nb_channels + j] = p_in[translation[i_nb_channels][j]
* 256 + i];
p_out[i * i_nb_channels + pi_chan_table[j]] = p_in[j * 256 + i];
}
}
}
......@@ -383,7 +370,7 @@ static void DoWork( aout_instance_t * p_aout, aout_filter_t * p_filter,
{
/* Interleave the *$% samples. */
Interleave( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
p_samples, p_sys->i_nb_channels );
p_samples, p_sys->i_nb_channels, p_sys->pi_chan_table);
}
}
......
modules/audio_filter/converter/dtstofloat32.c
View file @ 03f2c9e9
......@@ -52,6 +52,15 @@ static int OpenFilter ( vlc_object_t * );
static void CloseFilter( vlc_object_t * );
static block_t *Convert( filter_t *, block_t * );
/* libdts channel order */
static const uint32_t pi_channels_in[] =
{ AOUT_CHAN_CENTER, AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, AOUT_CHAN_LFE, 0 };
/* our internal channel order (WG-4 order) */
static const uint32_t pi_channels_out[] =
{ AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
/*****************************************************************************
* Local structures
*****************************************************************************/
......@@ -62,6 +71,8 @@ struct filter_sys_t
int i_flags; /* libdts flags, see dtsdec/doc/libdts.txt */
vlc_bool_t b_dontwarn;
int i_nb_channels; /* number of float32 per sample */
int pi_chan_table[AOUT_CHAN_MAX]; /* channel reordering */
};
/*****************************************************************************
......@@ -209,52 +220,28 @@ static int Open( vlc_object_t *p_this, filter_sys_t *p_sys,
return VLC_EGENERIC;
}
aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
output.i_physical_channels & AOUT_CHAN_PHYSMASK,
p_sys->i_nb_channels,
p_sys->pi_chan_table );
return VLC_SUCCESS;
}
/*****************************************************************************
* Interleave: helper function to interleave channels
*****************************************************************************/
static void Interleave( float * p_out, const float * p_in, int i_nb_channels )
static void Interleave( float * p_out, const float * p_in, int i_nb_channels,
int *pi_chan_table )
{
/* We do not only have to interleave, but also reorder the channels
* Channel reordering according to number of output channels of libdts
* The reordering needs to be different for different channel configurations
* (3F2R, 1F2R etc), so this is only temporary.
* The WG-4 order is appropriate for stereo, quadrophonia, and 5.1 surround.
*
* 6 channel mode
* channel libdts order WG-4 order
* 0 C // L
* 1 L // R
* 2 R // LS
* 3 LS // RS
* 4 RS // C
* 5 LFE // LFE
*
* The libdts moves channels to the front if there are unused spaces, so
* there is no gap between channels. The translation table says which
* channel of the new stream is taken from which original channel [use
* the new channel as the array index, use the number you get from the
* array to address the original channel].
*/
static const int translation[7][6] =
{{ 0, 0, 0, 0, 0, 0 }, /* 0 channels (rarely used) */
{ 0, 0, 0, 0, 0, 0 }, /* 1 ch */
{ 0, 1, 0, 0, 0, 0 }, /* 2 */
{ 1, 2, 0, 0, 0, 0 }, /* 3 */
{ 0, 1, 2, 3, 0, 0 }, /* 4 */
{ 1, 2, 3, 4, 0, 0 }, /* 5 */
{ 1, 2, 3, 4, 0, 5 }}; /* 6 */
/* We do not only have to interleave, but also reorder the channels. */
int i, j;
for ( j = 0; j < i_nb_channels; j++ )
{
for ( i = 0; i < 256; i++ )
{
p_out[i * i_nb_channels + j] = p_in[translation[i_nb_channels][j]
* 256 + i];
p_out[i * i_nb_channels + pi_chan_table[j]] = p_in[j * 256 + i];
}
}
}
......@@ -367,7 +354,7 @@ static void DoWork( aout_instance_t * p_aout, aout_filter_t * p_filter,
{
/* Interleave the *$% samples. */
Interleave( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
p_samples, p_sys->i_nb_channels );
p_samples, p_sys->i_nb_channels, p_sys->pi_chan_table);
}
}
......
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