void AudioGrabber::audioReceived(float * input, int bufferSize, int nChannels){
AudioFrame * frame = new AudioFrame(input,bufferSize,nChannels);
newFrameEvent.notify(this,*frame);
frame->release();
//cout << "audio: " << frame.getTimestamp().epochTime() << "\n";
}
AudioFrame * AudioHeader::getAudioFrame(int position,float density){
position = CLAMP(position,0,buffer->size());
AudioFrame * currentFrame = buffer->getAudioFrame(position);
vector<AudioFrame*> prevFrames;
vector<AudioFrame*> nextFrames;
for(int i=0;i<density+1;i++){
if(buffer->size()>position+i+1){
AudioFrame * frame = buffer->getAudioFrame(position+i);
if(frame){
nextFrames.push_back(frame);
}
}
}
for(int i=0;i>-density-1;i--){
if(position+i>0){
AudioFrame * frame = buffer->getAudioFrame(position+i);
if(frame){
nextFrames.push_back(frame);
}
}
}
int currentFrameSize=currentFrame->getBufferSize()*currentFrame->getChannels();
float resultBuffer[currentFrameSize];
memcpy(resultBuffer,currentFrame->getAudioFrame(),sizeof(float)*currentFrameSize);
for(int i=0;i<prevFrames.size();i++){
int frameSize=prevFrames[i]->getBufferSize()*prevFrames[i]->getChannels();
int offset=CLAMP((int)((float)frameSize*(density-(float)i)),0,frameSize);
for(int j=frameSize-offset;j<frameSize;j++){
resultBuffer[frameSize-j]=resultBuffer[frameSize-j]+prevFrames[i]->getAudioFrame()[j];
}
prevFrames[i]->release();
}
for(int i=0;i<nextFrames.size();i++){
int frameSize=nextFrames[i]->getBufferSize()*nextFrames[i]->getChannels();
int offset=CLAMP((int)((float)frameSize*(density-(float)i)),0,frameSize);
for(int j=0;j<offset;j++){
resultBuffer[frameSize-j]=resultBuffer[frameSize-j]+nextFrames[i]->getAudioFrame()[j];
}
nextFrames[i]->release();
}
AudioFrame * resultFrame=
new AudioFrame( resultBuffer,
currentFrame->getBufferSize(),
currentFrame->getChannels());
currentFrame->release();
return resultFrame;
}
