bool PortAudioDeviceDriver::getSound(yarp::sig::Sound& sound)
{
if (pThread.something_to_record == false)
{
this->startRecording();
}
int buff_size = 0;
static int buff_size_wdt = 0;
while (buff_size<this->numSamples*this->numChannels)
{
buff_size = dataBuffers.recData->size();
if (buff_size == 0 && buff_size_wdt++ == 100) break;
yarp::os::SystemClock::delaySystem(SLEEP_TIME);
}
buff_size_wdt = 0;
if (sound.getChannels()!=this->numChannels && sound.getSamples() != this->numSamples)
{
sound.resize(this->numSamples,this->numChannels);
}
sound.setFrequency(this->driverConfig.rate);
for (int i=0; i<this->numSamples; i++)
for (int j=0; j<this->numChannels; j++)
{
SAMPLE s = dataBuffers.recData->read();
sound.set(s,i,j);
}
return true;
}
bool MicrophoneDeviceDriver::getSound(yarp::sig::Sound& sound) {
// main loop to capture the waveform audio data
unsigned char *data = pulsecode;
int begun = 1;
int bytes_to_grab = NUM_SAMPLES / 16;
int bytes_to_save = NUM_SAMPLES;
while ( bytes_to_save > 0 )
{
int nbytes = read( dsp, data, bytes_to_grab );
if ( !begun )
{
int max = 0;
for (int i = 0; i < nbytes; i++)
if ( data[i] > max ) max = data[i];
if ( max > 0x99 ) begun = 1;
else continue;
}
bytes_to_save -= nbytes;
data += nbytes;
}
sound.resize(NUM_SAMPLES);
double total = 0;
for (int i=0; i<NUM_SAMPLES; i++) {
sound.set(pulsecode[i],i);
total += abs(pulsecode[i]-128);
}
printf( "grabbing a chunk of %d samples... magnitude: %g\n",
NUM_SAMPLES, total);
return true;
}