int main(int argc, char *argv[])
{
// Minimal command-line checking.
if ( argc < 3 || argc > 4 ) usage();
// Set the global sample rate before creating class instances.
Stk::setSampleRate( (StkFloat) atof( argv[2] ) );
// Initialize our WvIn and RtAudio pointers.
RtAudio dac;
FileWvIn input;
FileLoop inputLoop;
// Try to load the soundfile.
try {
input.openFile( argv[1] );
inputLoop.openFile( argv[1] );
}
catch ( StkError & ) {
exit( 1 );
}
// Set input read rate based on the default STK sample rate.
double rate = 1.0;
rate = input.getFileRate() / Stk::sampleRate();
rate = inputLoop.getFileRate() / Stk::sampleRate();
if ( argc == 4 ) rate *= atof( argv[3] );
input.setRate( rate );
input.ignoreSampleRateChange();
// Find out how many channels we have.
int channels = input.channelsOut();
// Figure out how many bytes in an StkFloat and setup the RtAudio stream.
RtAudio::StreamParameters parameters;
parameters.deviceId = dac.getDefaultOutputDevice();
parameters.nChannels = channels;
RtAudioFormat format = ( sizeof(StkFloat) == 8 ) ? RTAUDIO_FLOAT64 : RTAUDIO_FLOAT32;
unsigned int bufferFrames = RT_BUFFER_SIZE;
try {
dac.openStream( ¶meters, NULL, format, (unsigned int)Stk::sampleRate(), &bufferFrames, &tick, (void *)&inputLoop );
}
catch ( RtAudioError &error ) {
error.printMessage();
goto cleanup;
}
// Install an interrupt handler function.
(void) signal(SIGINT, finish);
// Resize the StkFrames object appropriately.
frames.resize( bufferFrames, channels );
try {
dac.startStream();
}
catch ( RtAudioError &error ) {
error.printMessage();
goto cleanup;
}
// Block waiting until callback signals done.
while ( !done )
Stk::sleep( 100 );
// By returning a non-zero value in the callback above, the stream
// is automatically stopped. But we should still close it.
try {
dac.closeStream();
}
catch ( RtAudioError &error ) {
error.printMessage();
}
cleanup:
return 0;
}
int main()
{
StkFloat d; // sample data
unsigned long inputSize; // size of the input file in sample frames
double inputDuration; // duration of the input file loop
unsigned int channels = 1;
//set global sample rate
Stk::setSampleRate(44100.0);
int nFrames=100000;
FileLoop input;
FileWvOut output;
// open the input and output files, with error checking
try {
// load the input file
input.openFile("rawwaves/Noisy_Miner_chirp_stereo.wav", false);
// open a 16 bit, one channel WAV formatted output
output.openFile("many_chirps.wav", 1, FileWrite::FILE_WAV, Stk::STK_SINT16);
}
catch (StkError &) {
exit(1);
}
// Set input read rate based on the default STK sample rate.
double rate;
double inputRate;
inputRate = input.getFileRate();
rate = inputRate / Stk::sampleRate();
input.setRate( rate );
// Find out the length of the input file
inputSize=input.getSize();
inputDuration = inputSize/inputRate;
std::cout << "input file is " << inputSize << " samples long with a duration of " << inputDuration << " sec." << std::endl;
// Find out how many channels we have.
channels = input.channelsOut();
std::cout << "input file has " << channels << " channels at "<< inputRate << "Hz sample rate " << std::endl;
std::cout << " we want to run a rate of " << Stk::sampleRate() << " and will sample the file by a factor of " << rate << std::endl;
// we want the chirps to be at the same frequency as they were recorded
// so we adjust the looping rate of recorded loop
// if you make the frequency negative, it reverses the loop!
input.setFrequency(1.0/inputDuration);
// run the oscillator for 40000 samples, writing to the output file
for (int i=0; i<nFrames; i++){
try {
d=input.tick(); // read 1 sample from the input file
output.tick(d); // write 1 sample to the output file
}
catch (StkError &) {
exit(1);
}
// print the first 100 samples to the std output for debugging
if (i<10){
std::cout << d << std::endl;
}
}
return 0;
}