if( i_input_nb >= i_output_nb )
{
p_out_buf = p_in_buf; /* mix in place */
- p_out_buf->i_buffer = p_in_buf->i_buffer / i_input_nb * i_output_nb;
+ p_out_buf->i_buffer = p_in_buf->i_buffer * i_output_nb / i_input_nb;
}
else
{
p_out_buf = block_Alloc(
- p_in_buf->i_buffer / i_input_nb * i_output_nb );
+ p_in_buf->i_buffer * i_output_nb / i_input_nb );
if( !p_out_buf )
goto out;
+ /* on upmixing case, zero out buffer */
+ memset( p_out_buf->p_buffer, 0, p_out_buf->i_buffer );
p_out_buf->i_nb_samples = p_in_buf->i_nb_samples;
p_out_buf->i_dts = p_in_buf->i_dts;
p_out_buf->i_pts = p_in_buf->i_pts;
float * p_dest = (float *)p_out_buf->p_buffer;
const float * p_src = (float *)p_in_buf->p_buffer;
+ const bool b_reverse_stereo = p_filter->fmt_out.audio.i_original_channels & AOUT_CHAN_REVERSESTEREO;
+ bool b_dualmono2stereo = (p_filter->fmt_in.audio.i_original_channels & AOUT_CHAN_DUALMONO );
+ b_dualmono2stereo &= (p_filter->fmt_out.audio.i_physical_channels & ( AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT ));
+ b_dualmono2stereo &= ((p_filter->fmt_out.audio.i_physical_channels & AOUT_CHAN_PHYSMASK) != (p_filter->fmt_in.audio.i_physical_channels & AOUT_CHAN_PHYSMASK));
- if ( (p_filter->fmt_out.audio.i_original_channels & AOUT_CHAN_PHYSMASK)
- != (p_filter->fmt_in.audio.i_original_channels & AOUT_CHAN_PHYSMASK)
- && (p_filter->fmt_in.audio.i_original_channels & AOUT_CHAN_PHYSMASK)
- == (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT) )
+ if( likely( !b_reverse_stereo && ! b_dualmono2stereo ) )
+ {
+ SparseCopy( p_dest, p_src, p_in_buf->i_nb_samples, i_output_nb,
+ i_input_nb );
+ }
+ /* Special case from dual mono to stereo */
+ else if ( b_dualmono2stereo )
{
int i;
/* This is a bit special. */
}
}
}
- else if ( p_filter->fmt_out.audio.i_original_channels
- & AOUT_CHAN_REVERSESTEREO )
+ else if ( b_reverse_stereo )
{
/* Reverse-stereo mode */
int i;
p_src += 2;
}
}
- else
- {
- SparseCopy( p_dest, p_src, p_in_buf->i_nb_samples, i_output_nb,
- i_input_nb );
- }
out:
if( p_in_buf != p_out_buf )
block_Release( p_in_buf );