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Mixer: Allow Mono Pan module to be added a stereo chain. This converts the signal to mono and then pans the result. Useful for auditioning a mix in mono.

This commit is contained in:
Jonathan Moore Liles 2020-10-11 23:16:26 -07:00
parent 83f7aa87f0
commit 7895b5ec7e
2 changed files with 30 additions and 6 deletions
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28
mixer/src/Mono_Pan_Module.C
View File

@ -66,8 +66,22 @@ Mono_Pan_Module::handle_sample_rate_change ( nframes_t n )
}
bool
Mono_Pan_Module::configure_inputs ( int )
Mono_Pan_Module::configure_inputs ( int n )
{
THREAD_ASSERT( UI );
int on = audio_input.size();
if ( n > on )
{
add_port( Port( this, Port::INPUT, Port::AUDIO ) );
}
else if ( n < on )
{
audio_input.back().disconnect();
audio_input.pop_back();
}
return true;
}
@ -81,9 +95,12 @@ void
Mono_Pan_Module::process ( nframes_t nframes )
{
if ( unlikely( bypass() ) )
{
if ( audio_input.size() == 1 )
{
buffer_copy( (sample_t*)audio_output[1].buffer(), (sample_t*)audio_input[0].buffer(), nframes );
}
}
else
{
const float gt = (control_input[0].control_value() + 1.0f) * 0.5f;
@ -91,10 +108,17 @@ Mono_Pan_Module::process ( nframes_t nframes )
sample_t gainbuf[nframes];
bool use_gainbuf = smoothing.apply( gainbuf, nframes, gt );
if ( audio_input.size() == 2 )
{
/* convert stereo to mono */
buffer_mix( (sample_t*)audio_input[0].buffer(),
(sample_t*)audio_input[1].buffer(),
nframes );
}
if ( unlikely( use_gainbuf ) )
{
/* right channel */
buffer_copy_and_apply_gain_buffer( (sample_t*)audio_output[1].buffer(),
(sample_t*)audio_input[0].buffer(),
gainbuf,

2
mixer/src/Mono_Pan_Module.H
View File

@ -33,7 +33,7 @@ public:
const char *name ( void ) const { return "Mono Pan"; }
int can_support_inputs ( int n ) { return ( n == 1 ) ? 2 : -1; }
int can_support_inputs ( int n ) { return ( n == 1 || n == 2 ) ? 2 : -1; }
bool configure_inputs ( int n );
LOG_CREATE_FUNC( Mono_Pan_Module );