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vlc-2-2
Commit cef84e5f authored by James Turner's avatar James Turner Committed by Rémi Denis-Courmont
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AC3 3F1R downmix to stereo (simple downmixer) 

Signed-off-by: default avatarRémi Denis-Courmont <remi@remlab.net>
parent e44b8916
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modules/audio_filter/channel_mixer/simple.c
View file @ cef84e5f
......@@ -65,6 +65,7 @@ vlc_module_end ()
#define AOUT_CHANS_3_0 ( AOUT_CHANS_STEREO_FRONT | AOUT_CHAN_CENTER )
#define AOUT_CHANS_4_0 ( AOUT_CHANS_STEREO_FRONT | AOUT_CHANS_STEREO_REAR )
#define AOUT_CHANS_4_0_MIDDLE ( AOUT_CHANS_STEREO_FRONT | AOUT_CHANS_STEREO_MIDDLE )
#define AOUT_CHANS_4_CENTER_REAR (AOUT_CHANS_STEREO_FRONT | AOUT_CHAN_CENTER | AOUT_CHAN_REARCENTER)
#define AOUT_CHANS_5_0 ( AOUT_CHANS_4_0 | AOUT_CHAN_CENTER )
#define AOUT_CHANS_5_0_MIDDLE ( AOUT_CHANS_4_0_MIDDLE | AOUT_CHAN_CENTER )
#define AOUT_CHANS_6_0 ( AOUT_CHANS_STEREO_FRONT | AOUT_CHANS_STEREO_REAR | AOUT_CHANS_STEREO_MIDDLE )
......@@ -108,6 +109,9 @@ static void DoWork( aout_instance_t * p_aout, aout_filter_t * p_filter,
(i_input_physical & AOUT_CHANS_5_0_MIDDLE) == AOUT_CHANS_5_0_MIDDLE );
const bool b_input_3_0 = !b_input_7_0 && !b_input_5_0 &&
(i_input_physical & ~AOUT_CHAN_LFE) == AOUT_CHANS_3_0;
const bool b_input_4_center_rear = (i_input_physical & ~AOUT_CHAN_LFE) == AOUT_CHANS_4_CENTER_REAR;
int i_input_nb = aout_FormatNbChannels( &p_filter->input );
int i_output_nb = aout_FormatNbChannels( &p_filter->output );
float *p_dest = (float *)p_out_buf->p_buffer;
......@@ -155,6 +159,15 @@ static void DoWork( aout_instance_t * p_aout, aout_filter_t * p_filter,
if( p_filter->input.i_physical_channels & AOUT_CHAN_LFE ) p_src++;
}
else if (b_input_4_center_rear)
for( i = p_in_buf->i_nb_samples; i--; )
{
*p_dest = p_src[2] + p_src[3] + 0.5 * p_src[0];
p_dest++;
*p_dest = p_src[2] + p_src[3] + 0.5 * p_src[1];
p_dest++;
p_src += 4;
}
}
else if( p_filter->output.i_physical_channels == AOUT_CHAN_CENTER )
{
......@@ -345,6 +358,7 @@ static bool IsSupported( const audio_format_t *p_input, const audio_format_t *p_
(p_input->i_physical_channels & ~AOUT_CHAN_LFE) != AOUT_CHANS_5_0 &&
(p_input->i_physical_channels & ~AOUT_CHAN_LFE) != AOUT_CHANS_5_0_MIDDLE &&
(p_input->i_physical_channels & ~AOUT_CHAN_LFE) != AOUT_CHANS_3_0 &&
(p_input->i_physical_channels & ~AOUT_CHAN_LFE) != AOUT_CHANS_4_CENTER_REAR &&
p_input->i_physical_channels != AOUT_CHANS_2_0 )
{
return false;
......
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