TTAudioGraphJoin.h

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/** @file
 *
 * @ingroup audioGraphUtilityLib
 *
 * @brief join≈: merge multichannel signals
 *
 * @details
 *
 * @authors Timothy Place
 *
 * @copyright Copyright © 2008 by Timothy Place @n
 * This code is licensed under the terms of the "New BSD License" @n
 * http://creativecommons.org/licenses/BSD/
 */


#ifndef __TT_JOIN_H__
#define __TT_JOIN_H__

#include "TTDSP.h"


/** The join≈ object takes N input signals and combines them
 into a single signal with all of the channels present.
 */
class TTAudioGraphJoin : public TTAudioObjectBase {
    TTCLASS_SETUP(TTAudioGraphJoin)
    
protected:
    
    TTErr processAudio(TTAudioSignalArrayPtr inputs, TTAudioSignalArrayPtr outputs)
    {
        TTChannelCount  numSignals = inputs->numAudioSignals;
        TTChannelCount  numAccumulatedChannels = 0;
        TTAudioSignal&  out = outputs->getSignal(0);
        
        // 1. figure out our total number of channels
        for (TTChannelCount i=0; i<numSignals; i++) {
            TTAudioSignal&  in = inputs->getSignal(i);
            numAccumulatedChannels += in.getNumChannelsAsInt(); 
        }
        
        // 2. setup our output buffer for the correct number of channels
        // TODO: check if a resize is necessary
        out.setMaxNumChannels(numAccumulatedChannels);
        out.setNumChannels(numAccumulatedChannels);
                
        // 3. copy the data to the output buffer
        numAccumulatedChannels = 0;
        for (TTChannelCount i=0; i<numSignals; i++) {
            TTAudioSignal&  in = inputs->getSignal(i);
            TTAudioSignal::copyDirty(in, out, numAccumulatedChannels);
            numAccumulatedChannels += in.getNumChannelsAsInt();
        }
        return kTTErrNone;
    }
    
};




#endif // __TT_JOIN_H__