FMOD waveforms in Cinder

gistfile1.cpp

	void Player::getWaveformPreview(vector <Vec2f> &preview, unsigned int size){

		if (size == 0)
		{
			return;
		}
		preview.clear();
		peak = 0;
		void  *waveData;
		void  *pointer2;
		unsigned int length1;
		unsigned int length2;

		int factor = ((lenghtSamples)/size)*channels; 
		mSound->lock(0, lenghtSamples, &waveData , &pointer2, &length1,&length2);
		signed short* tempOneChannel=static_cast<signed short*>(waveData); 

		vector <int> Tempsample;
		Tempsample.clear();
		for(int i = 0; i < lenghtSamples*channels; i++) 
		{
			if(abs(tempOneChannel[i]) > peak) peak= tempOneChannel[i];
			Tempsample.push_back( tempOneChannel[i]);
			int l = i%factor;
			if(l==0)                         
			{
				auto maxSample = std::max_element(std::begin(Tempsample), std::end(Tempsample));
				auto minSample = std::min_element(std::begin(Tempsample), std::end(Tempsample));
				preview.push_back(Vec2f(*maxSample, *minSample));


				Tempsample.clear();                     
			}   
		}
	
		mSound->unlock(waveData, pointer2, length1, length2);
		
		
	}
	
	
	
	void Player::getPartWaveform(vector <Vec2f> &fullWaveform, int offset, int lenght){
		

		if (offset > lenght)
		{
			return;
		}
		fullWaveform.clear();
		void  *waveData;
		void  *pointer2;
		unsigned int length1 =lenght*4;
		unsigned int length2;
		ci::app::console() << "start: " << offset << " end: " << lenght<< endl;
		
		mSound->lock(offset*4, lenghtSamples, &waveData , &pointer2, &length1,&length2);
		signed short* tempOneChannel=static_cast<signed short*>(waveData); 

		for(int i = 0; i < (lenght-offset)*channels; i++) 
		{
			if(abs(tempOneChannel[i]) > peak) peak= tempOneChannel[i];
			fullWaveform.push_back(Vec2f( i ,tempOneChannel[i] ));	
		}
		mSound->unlock(waveData, pointer2, length1, length2);
		
	}