199 lines
5.1 KiB
C++
199 lines
5.1 KiB
C++
/*
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* Author: Harry van Haaren 2013
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* harryhaaren@gmail.com
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "trackoutput.hxx"
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#include "jack.hxx"
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extern Jack* jack;
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TrackOutput::TrackOutput(int t, AudioProcessor* ap) :
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AudioProcessor(),
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track(t),
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_recordArm(false),
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previousInChain(ap)
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{
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// UI update
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uiUpdateConstant = jack->getSamplerate() / 30;
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uiUpdateCounter = jack->getSamplerate() / 30;
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dbMeter = new DBMeter( jack->getSamplerate() );
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_toMaster = 0.8;
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_toMasterLag = 0.8;
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_toMasterDiff = 0;
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_toMasterPan = 0.f;
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_toReverb = 0.0;
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_toSidechain = 0.0;
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_toPostSidechain = 0.0;
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_toPostfaderActive = 0;
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_toKeyActive = 0;
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_toXSideActive = true;
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}
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void TrackOutput::setMaster(float value)
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{
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if(value < 0.01)
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value = 0.f;
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_toMaster = value;
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_toMasterDiff=_toMaster-_toMasterLag;
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}
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float TrackOutput::getMaster()
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{
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return _toMaster;
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}
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bool TrackOutput::recordArm()
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{
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return _recordArm;
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}
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void TrackOutput::recordArm(bool r)
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{
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_recordArm = r;
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}
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void TrackOutput::setSendActive( int send, bool a )
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{
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switch( send ) {
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case SEND_POSTFADER:
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_toPostfaderActive = a;
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break;
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case SEND_KEY:
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_toKeyActive = a;
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break;
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//case SEND_XSIDE:
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// _toXSideActive = a;
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default:
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break;
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}
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}
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void TrackOutput::setPan( float pan )
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{
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_toMasterPan = pan;
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}
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void TrackOutput::setSend( int send, float value )
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{
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switch( send ) {
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case SEND_POSTFADER:
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_toReverb = value;
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break;
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case SEND_KEY:
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// setSendActive() handles on/off for this send
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//_toSidechain = value;
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break;
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case SEND_XSIDE:
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_toPostSidechain = value;
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break;
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}
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}
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void TrackOutput::process(unsigned int nframes, Buffers* buffers)
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{
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//compute master volume lag;
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if(fabs(_toMaster-_toMasterLag)>=fabs(_toMasterDiff/100.0))
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_toMasterLag+=_toMasterDiff/10.0;
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// get & zero track buffer
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float* trackBufferL = buffers->audio[Buffers::RETURN_TRACK_0_L + track];
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float* trackBufferR = buffers->audio[Buffers::RETURN_TRACK_0_R + track];
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memset( trackBufferL, 0, sizeof(float)*nframes );
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memset( trackBufferR, 0, sizeof(float)*nframes );
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// call process() up the chain
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previousInChain->process( nframes, buffers );
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// run the meter
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dbMeter->process( nframes, trackBufferL, trackBufferR );
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if (uiUpdateCounter > uiUpdateConstant ) {
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float l = dbMeter->getLeftDB() * _toMasterLag;
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float r = dbMeter->getRightDB() * _toMasterLag;
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EventTrackSignalLevel e( track, l, r );
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writeToGuiRingbuffer( &e );
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uiUpdateCounter = 0;
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}
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uiUpdateCounter += nframes;
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// copy audio data into reverb / sidechain / master buffers
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float* reverbL = buffers->audio[Buffers::SEND_L];
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float* reverbR = buffers->audio[Buffers::SEND_R];
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float* sidechainL = buffers->audio[Buffers::SIDECHAIN_KEY_L];
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float* sidechainR = buffers->audio[Buffers::SIDECHAIN_KEY_R];
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float* postSidechainL = buffers->audio[Buffers::SIDECHAIN_SIGNAL_L];
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float* postSidechainR = buffers->audio[Buffers::SIDECHAIN_SIGNAL_R];
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float* masterL = buffers->audio[Buffers::MASTER_OUT_L];
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float* masterR = buffers->audio[Buffers::MASTER_OUT_R];
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float* jackoutputL = buffers->audio[Buffers::JACK_TRACK_0_L+track];
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float* jackoutputR = buffers->audio[Buffers::JACK_TRACK_0_R+track];
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/* Trial + Error leads to this algo - its cheap and cheerful */
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float pan_l = 1.0f;
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float pan_r = 1.0f;
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if(_toMasterPan <= 0) {
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// pan to left channel, lower right one
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pan_r = _toMasterPan + 1.0f;
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} else {
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// pan to right channel, lower left one
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pan_l = (_toMasterPan * -1) + 1.0f;
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}
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for(unsigned int i = 0; i < nframes; i++) {
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// * master for "post-fader" sends
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float tmpL = trackBufferL[i];
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float tmpR = trackBufferR[i];
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// post-sidechain *moves* signal between "before/after" ducking, not add!
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masterL[i] += tmpL * _toMasterLag * (1-_toPostSidechain) * pan_l;
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masterR[i] += tmpR * _toMasterLag * (1-_toPostSidechain) * pan_r;
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if(jackoutputL)
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jackoutputL[i] = tmpL * _toMasterLag * (1-_toPostSidechain);
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if(jackoutputR)
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jackoutputR[i] = tmpR * _toMasterLag * (1-_toPostSidechain);
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if ( _toPostfaderActive ) {
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reverbL[i] += tmpL * _toReverb * _toMasterLag;
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reverbR[i] += tmpR * _toReverb * _toMasterLag;
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}
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if ( _toXSideActive ) {
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postSidechainL[i] += tmpL * _toPostSidechain * _toMasterLag;
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postSidechainR[i] += tmpR * _toPostSidechain * _toMasterLag;
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}
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// turning down an element in the mix should *NOT* influence sidechaining
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if ( _toKeyActive ) {
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sidechainL[i] += tmpL;
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sidechainR[i] += tmpR;
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}
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}
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}
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TrackOutput::~TrackOutput()
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{
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delete dbMeter;
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}
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