119 lines
3.4 KiB
C
119 lines
3.4 KiB
C
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/*******************************************************************************/
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/* Copyright (C) 2009 Jonathan Moore Liles */
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/* */
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/* This program is free software; you can redistribute it and/or modify it */
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/* under the terms of the GNU General Public License as published by the */
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/* Free Software Foundation; either version 2 of the License, or (at your */
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/* option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, but WITHOUT */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for */
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/* more details. */
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/* */
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/* You should have received a copy of the GNU General Public License along */
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/* with This program; see the file COPYING. If not,write to the Free Software */
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/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/*******************************************************************************/
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#include <math.h>
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#include <dsp.h>
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#include "Gain_Module.H"
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Gain_Module::Gain_Module ( )
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: Module ( 50, 24, name() )
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{
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add_port( Port( this, Port::INPUT, Port::AUDIO ) );
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add_port( Port( this, Port::OUTPUT, Port::AUDIO ) );
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Port p( this, Port::INPUT, Port::CONTROL, "Gain (dB)" );
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p.hints.type = Port::Hints::LOGARITHMIC;
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p.hints.ranged = true;
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p.hints.minimum = -70.0f;
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p.hints.maximum = 6.0f;
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p.hints.default_value = 0.0f;
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p.connect_to( new float );
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p.control_value( p.hints.default_value );
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add_port( p );
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end();
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log_create();
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smoothing.sample_rate( sample_rate() );
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}
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Gain_Module::~Gain_Module ( )
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{
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delete (float*)control_input[0].buffer();
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log_destroy();
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}
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bool
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Gain_Module::configure_inputs ( int n )
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{
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audio_input.clear();
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audio_output.clear();
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// control_input.clear();
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for ( int i = 0; i < n; ++i )
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{
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add_port( Port( this, Port::INPUT, Port::AUDIO ) );
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add_port( Port( this, Port::OUTPUT, Port::AUDIO ) );
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}
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return true;
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}
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void
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Gain_Module::handle_sample_rate_change ( nframes_t n )
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{
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smoothing.sample_rate( n );
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}
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/**********/
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/* Engine */
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/**********/
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void
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Gain_Module::process ( nframes_t nframes )
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{
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const float gt = DB_CO( control_input[0].control_value() );
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sample_t gainbuf[nframes];
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bool use_gainbuf = smoothing.apply( gainbuf, nframes, gt );
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if ( use_gainbuf )
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{
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for ( int i = audio_input.size(); i--; )
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{
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if ( audio_input[i].connected() && audio_output[i].connected() )
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{
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sample_t *out = (sample_t*)audio_input[i].buffer();
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buffer_apply_gain_buffer( out, gainbuf, nframes );
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}
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}
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}
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else
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for ( int i = audio_input.size(); i--; )
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{
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if ( audio_input[i].connected() && audio_output[i].connected() )
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{
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buffer_apply_gain( (sample_t*)audio_input[i].buffer(), nframes, gt );
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}
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}
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}
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