void SoundRecorder::start(void)
{
/* Do nothing if already started: */
if(active)
return;
#if SOUND_CONFIG_HAVE_ALSA
/* Reset the number of recorded frames: */
numRecordedFrames=0;
/* Write an empty audio file header if necessary: */
if(outputFileFormat==WAV)
writeWAVHeader();
/* Start the PCM device: */
pcmDevice.start();
/* Start the background recording thread: */
recordingThread.start(this,&SoundRecorder::recordingThreadMethod);
#endif
active=true;
}
SoundRecorder::~SoundRecorder(void)
{
#if SOUND_CONFIG_HAVE_ALSA
/* Stop the recording thread if still active: */
if(active)
{
recordingThread.cancel();
recordingThread.join();
/* Stop the PCM device: */
pcmDevice.drop();
/* Write the final audio file header if necessary: */
if(outputFileFormat==WAV)
writeWAVHeader();
}
/* Close the output file: */
delete outputFile;
/* Delete the sample buffer: */
delete[] sampleBuffer;
#endif
}
WAVWriter::WAVWriter(const SYSCHAR* fileName) :
AudioDriver_NULL(),
f(NULL),
mixFreq(44100)
{
TWAVHeader hdr;
f = new XMFile(fileName, true);
if (!f->isOpenForWriting())
{
delete f;
f = NULL;
}
else
{
// build wav header
memcpy(hdr.RIFF, "RIFF", 4);
hdr.length = 44 - 8;
memcpy(hdr.WAVE, "WAVE", 4);
memcpy(hdr.FMT, "fmt ", 4);
hdr.fmtDataLength = 16;
hdr.encodingTag = 1;
hdr.numChannels = 2;
hdr.sampleRate = mixFreq;
hdr.numBits = 16;
hdr.blockAlign = (hdr.numChannels*hdr.numBits) / 8;
hdr.bytesPerSecond = hdr.sampleRate*hdr.blockAlign;
memcpy(hdr.DATA, "data", 4);
hdr.dataLength = 0;
writeWAVHeader(f, hdr);
}
}
mp_sint32 WAVWriter::closeDevice()
{
if (!f)
return MP_DEVICE_ERROR;
TWAVHeader hdr;
// build wav header
memcpy(hdr.RIFF, "RIFF", 4);
hdr.length = 44 + numSamplesWritten*4 - 8;
memcpy(hdr.WAVE, "WAVE", 4);
memcpy(hdr.FMT, "fmt ", 4);
hdr.fmtDataLength = 16;
hdr.encodingTag = 1;
hdr.numChannels = 2;
hdr.sampleRate = mixFreq;
hdr.numBits = 16;
hdr.blockAlign = (hdr.numChannels*hdr.numBits) / 8;
hdr.bytesPerSecond = hdr.sampleRate*hdr.blockAlign;
memcpy(hdr.DATA, "data", 4);
hdr.dataLength = (numSamplesWritten*2*hdr.numBits)/8;
f->seek(0);
writeWAVHeader(f, hdr);
return MP_OK;
}
SoundRecorder::~SoundRecorder(void)
{
#if SOUND_CONFIG_HAVE_ALSA
/* Stop the recording thread if still active: */
if(active)
{
/* Stop the recording thread at the next opportunity: */
keepReading=false;
recordingThread.join();
/* Write the final audio file header if necessary: */
if(outputFileFormat==WAV)
writeWAVHeader();
}
/* Delete the sample buffer: */
delete[] sampleBuffer;
#endif
}
void SoundRecorder::stop(void)
{
/* Do nothing if not started: */
if(!active)
return;
#if SOUND_CONFIG_HAVE_ALSA
/* Kill the background recording thread: */
recordingThread.cancel();
recordingThread.join();
/* Stop the PCM device: */
pcmDevice.drop();
/* Write the final audio file header if necessary: */
if(outputFileFormat==WAV)
writeWAVHeader();
#endif
active=false;
}
