void EngineRecord::writeCueLine() {
if (!m_pCurrentTrack) {
return;
}
// CDDA is specified as having 75 frames a second
unsigned long cueFrame = ((unsigned long)
((m_frames / (m_sampleRate / 75)))
% 75);
m_cueFile.write(QString(" TRACK %1 AUDIO\n")
.arg((double)m_cueTrack, 2, 'f', 0, '0')
.toLatin1());
m_cueFile.write(QString(" TITLE \"%1\"\n")
.arg(m_pCurrentTrack->getTitle()).toLatin1());
m_cueFile.write(QString(" PERFORMER \"%1\"\n")
.arg(m_pCurrentTrack->getArtist()).toLatin1());
// Woefully inaccurate (at the seconds level anyways).
// We'd need a signal fired state tracker
// for the track detection code.
m_cueFile.write(QString(" INDEX 01 %1:%2\n")
.arg(getRecordedDurationStr())
.arg((double)cueFrame, 2, 'f', 0, '0').toLatin1());
}
void EngineRecord::process(const CSAMPLE* pBuffer, const int iBufferSize) {
float recordingStatus = m_pRecReady->get();
if (recordingStatus == RECORD_OFF) {
//qDebug("Setting record flag to: OFF");
if (fileOpen()) {
Event::end("EngineRecord recording");
closeFile(); // Close file and free encoder.
emit(isRecording(false));
}
} else if (recordingStatus == RECORD_READY) {
// If we are ready for recording, i.e, the output file has been selected, we
// open a new file.
updateFromPreferences(); // Update file location from preferences.
if (openFile()) {
Event::start("EngineRecord recording");
qDebug("Setting record flag to: ON");
m_pRecReady->set(RECORD_ON);
emit(isRecording(true)); // will notify the RecordingManager
// Since we just started recording, timeout and clear the metadata.
m_iMetaDataLife = kMetaDataLifeTimeout;
m_pCurrentTrack = TrackPointer();
// clean frames couting and get current sample rate.
m_frames = 0;
m_sampleRate = m_pSamplerate->get();
if (m_bCueIsEnabled) {
openCueFile();
m_cueTrack = 0;
}
} else { // Maybe the encoder could not be initialized
qDebug("Setting record flag to: OFF");
m_pRecReady->slotSet(RECORD_OFF);
emit(isRecording(false));
}
} else if (recordingStatus == RECORD_ON) {
// If recording is enabled process audio to compressed or uncompressed data.
if (m_encoding == ENCODING_WAVE || m_encoding == ENCODING_AIFF) {
if (m_pSndfile != NULL) {
sf_write_float(m_pSndfile, pBuffer, iBufferSize);
emit(bytesRecorded(iBufferSize * 2));
}
} else {
if (m_pEncoder) {
// Compress audio. Encoder will call method 'write()' below to
// write a file stream
m_pEncoder->encodeBuffer(pBuffer, iBufferSize);
}
}
// update frames counting and recorded duration (seconds)
m_frames += iBufferSize / 2;
unsigned long lastDuration = m_recordedDuration;
m_recordedDuration = m_frames / m_sampleRate;
// gets recorded duration and emit signal that will be used
// by RecordingManager to update the label besides start/stop button
if (lastDuration != m_recordedDuration) {
emit(durationRecorded(getRecordedDurationStr()));
}
if (m_bCueIsEnabled) {
if (metaDataHasChanged()) {
m_cueTrack++;
writeCueLine();
m_cueFile.flush();
}
}
}
}
