//--------------------------------------------------------------
bool ofxSoundFile::save(string path, const ofSoundBuffer &buff){
// check that we're writing a wav and complain if the file extension is wrong.
ofFile f(path);
if(ofToLower(f.getExtension())!="wav") {
path += ".wav";
ofLogWarning() << "Can only write wav files - will save file as " << path;
}
fstream file(ofToDataPath(path).c_str(), ios::out | ios::binary);
if(!file.is_open()) {
ofLogError() << "Error opening sound file '" << path << "' for writing";
return false;
}
// write a wav header
short myFormat = 1; // for pcm
int mySubChunk1Size = 16;
int bitsPerSample = 16; // assume 16 bit pcm
int myByteRate = buff.getSampleRate() * buff.getNumChannels() * bitsPerSample/8;
short myBlockAlign = buff.getNumChannels() * bitsPerSample/8;
int myChunkSize = 36 + buff.size()*bitsPerSample/8;
int myDataSize = buff.size()*bitsPerSample/8;
int channels = buff.getNumChannels();
int samplerate = buff.getSampleRate();
file.seekp (0, ios::beg);
file.write ("RIFF", 4);
file.write ((char*) &myChunkSize, 4);
file.write ("WAVE", 4);
file.write ("fmt ", 4);
file.write ((char*) &mySubChunk1Size, 4);
file.write ((char*) &myFormat, 2); // should be 1 for PCM
file.write ((char*) &channels, 2); // # channels (1 or 2)
file.write ((char*) &samplerate, 4); // 44100
file.write ((char*) &myByteRate, 4); //
file.write ((char*) &myBlockAlign, 2);
file.write ((char*) &bitsPerSample, 2); //16
file.write ("data", 4);
file.write ((char*) &myDataSize, 4);
// write the wav file per the wav file format, 4096 bytes of data at a time.
#define WRITE_BUFF_SIZE 4096
short writeBuff[WRITE_BUFF_SIZE];
int pos = 0;
while(pos<buff.size()) {
int len = MIN(WRITE_BUFF_SIZE, buff.size()-pos);
for(int i = 0; i < len; i++) {
writeBuff[i] = (int)(buff[pos]*32767.f);
pos++;
}
file.write((char*)writeBuff, len*bitsPerSample/8);
}
file.close();
return true;
}
void ofxBasicSoundPlayer::audioOut(ofSoundBuffer& outputBuffer){
if(bIsPlaying){
int nFrames = outputBuffer.getNumFrames();
int nChannels = outputBuffer.getNumChannels();
if (playerNumChannels != nChannels || playerNumFrames != nFrames || playerSampleRate != outputBuffer.getSampleRate()) {
audioOutBuffersChanged(nFrames, nChannels, outputBuffer.getSampleRate());
}
if(streaming){
int samplesRead = soundFile.readTo(buffer,nFrames);
if ( samplesRead==0 ){
bIsPlaying=false;
soundFile.seekTo(0);
}
else{
buffer.stereoPan(volumesLeft.back(),volumesRight.back());
newBufferE.notify(this,buffer);
buffer.copyTo(outputBuffer);
}
}else{
if (positions.size() == 1 && abs(speed - 1)<FLT_EPSILON) {
buffer.copyTo(outputBuffer,nFrames,nChannels,positions[0],loop);
}else{
for(int i=0;i<(int)positions.size();i++){
//assert( resampledBuffer.getNumFrames() == bufferSize*relativeSpeed[i] );
if(abs(relativeSpeed[i] - 1)<FLT_EPSILON){
buffer.copyTo(resampledBuffer,nFrames,nChannels,positions[i],loop);
}else{
buffer.resampleTo(resampledBuffer,positions[i],nFrames,relativeSpeed[i],loop, ofSoundBuffer::Linear);
}
resampledBuffer.stereoPan(volumesLeft[i],volumesRight[i]);
newBufferE.notify(this,resampledBuffer);
resampledBuffer.addTo(outputBuffer,0,loop);
}
}
updatePositions(nFrames);
}
}
}
