void AudioFileWriter::run() { QFile file(outFileName); bool waveMode = false; if (outFileName.endsWith(".wav")) waveMode = true; if (!file.open(QIODevice::WriteOnly)) { qDebug() << "AudioFileWriter: Can't open file for writing:" << outFileName; synth->close(); if (!realtimeMode) { Master::getInstance()->setAudioFileWriterSynth(NULL); } return; } if (waveMode) file.seek(44); MasterClockNanos startNanos = MasterClock::getClockNanos(); MasterClockNanos firstSampleNanos = 0; MasterClockNanos midiTick = 0; MasterClockNanos midiNanos = 0; QMidiEventList midiEvents; int midiEventIx = 0; uint parserIx = 0; bool skipSilence = false; if (realtimeMode) { firstSampleNanos = startNanos; } else { midiEvents = parsers[parserIx].getMIDIEvents(); midiTick = parsers[parserIx].getMidiTick(); skipSilence = true; } qDebug() << "AudioFileWriter: Rendering started"; while (!stopProcessing) { uint frameCount = 0; if (realtimeMode) { frameCount = uint((sampleRate * (MasterClock::getClockNanos() - firstSampleNanos)) / MasterClock::NANOS_PER_SECOND); if (frameCount < bufferSize) { usleep(ulong((MasterClock::MICROS_PER_SECOND * (bufferSize - frameCount)) / sampleRate)); continue; } else { frameCount = bufferSize; } } else { while (midiEventIx < midiEvents.count()) { const QMidiEvent &e = midiEvents.at(midiEventIx); bool eventPushed = true; MasterClockNanos nextEventNanos = midiNanos + e.getTimestamp() * midiTick; quint32 nextEventFrames = quint32(((double)sampleRate * nextEventNanos) / MasterClock::NANOS_PER_SECOND); frameCount = uint((sampleRate * (nextEventNanos - firstSampleNanos)) / MasterClock::NANOS_PER_SECOND); if (bufferSize < frameCount) { frameCount = bufferSize; break; } switch (e.getType()) { case SHORT_MESSAGE: eventPushed = synth->playMIDIShortMessage(e.getShortMessage(), nextEventFrames); break; case SYSEX: eventPushed = synth->playMIDISysex(e.getSysexData(), e.getSysexLen(), nextEventFrames); break; case SET_TEMPO: midiTick = parsers[parserIx].getMidiTick(e.getShortMessage()); break; default: break; } if (!eventPushed) { qDebug() << "AudioFileWriter: MIDI buffer overflow, midiNanos:" << midiNanos; break; } midiNanos = nextEventNanos; midiEventIx++; emit midiEventProcessed(midiEventIx, midiEvents.count()); } if (midiEvents.count() <= midiEventIx) { if (parserIx < parsersCount - 1) { ++parserIx; midiEventIx = 0; midiEvents = parsers[parserIx].getMIDIEvents(); midiTick = parsers[parserIx].getMidiTick(); continue; } if (!synth->isActive() && frameCount == 0) break; frameCount += bufferSize; qDebug() << "AudioFileWriter: Rendering after the end of MIDI file, time:" << (double)midiNanos / MasterClock::NANOS_PER_SECOND; } } while (frameCount > 0) { uint framesToRender = qMin(bufferSize, frameCount); synth->render(buffer, framesToRender); // libmt32emu produces samples in native byte order QSynth::convertSamplesFromNativeEndian(buffer, framesToRender << 1, waveMode ? QSysInfo::LittleEndian : QSysInfo::BigEndian); qint64 bytesToWrite = framesToRender * FRAME_SIZE; char *bufferPos = (char *)buffer; if (skipSilence) { qint32 *startPos = (qint32 *)buffer; qint32 *endPos = startPos + framesToRender; bytesToWrite = 0; for (qint32 *p = startPos; p < endPos; p++) { if (*p != 0) { skipSilence = false; bufferPos = (char *)p; bytesToWrite = (char *)endPos - bufferPos; break; } } } while (bytesToWrite > 0) { qint64 bytesWritten = file.write(bufferPos, bytesToWrite); if (bytesWritten == -1) { qDebug() << "AudioFileWriter: error writing into the audio file:" << file.errorString(); file.close(); return; } bytesToWrite -= bytesWritten; bufferPos += bytesWritten; } firstSampleNanos += MasterClock::NANOS_PER_SECOND * framesToRender / sampleRate; frameCount -= framesToRender; if (!realtimeMode) qDebug() << "AudioFileWriter: Rendering time:" << (double)firstSampleNanos / MasterClock::NANOS_PER_SECOND; } } qDebug() << "AudioFileWriter: Rendering finished"; if (!realtimeMode) qDebug() << "AudioFileWriter: Elapsed seconds: " << 1e-9 * (MasterClock::getClockNanos() - startNanos); if (waveMode) { unsigned char *charBuffer = (unsigned char *)buffer; memcpy(charBuffer, WAVE_HEADER, 44); quint32 fileSize = (quint32)file.size(); qToLittleEndian(fileSize - 8, charBuffer + 4); qToLittleEndian(fileSize - 44, charBuffer + 40); qToLittleEndian(sampleRate, charBuffer + 24); qToLittleEndian(sampleRate * FRAME_SIZE, charBuffer + 28); file.seek(0); file.write((char *)charBuffer, 44); } file.close(); synth->close(); if (!realtimeMode) { Master::getInstance()->setAudioFileWriterSynth(NULL); } if (!stopProcessing) emit conversionFinished(); }
void AudioFileRenderer::run() { AudioFileWriter writer(sampleRate, outFileName); if (!writer.open(!realtimeMode)) { synth->close(); if (!realtimeMode) Master::getInstance()->setAudioFileWriterSynth(NULL); emit conversionFinished(); return; } MasterClockNanos startNanos = MasterClock::getClockNanos(); MasterClockNanos firstSampleNanos = 0; MasterClockNanos midiTick = 0; MasterClockNanos midiNanos = 0; QMidiEventList midiEvents; int midiEventIx = 0; uint parserIx = 0; if (realtimeMode) { firstSampleNanos = startNanos; } else { midiEvents = parsers[parserIx].getMIDIEvents(); midiTick = parsers[parserIx].getMidiTick(); } qDebug() << "AudioFileRenderer: Rendering started"; while (!stopProcessing) { uint frameCount = 0; if (realtimeMode) { frameCount = uint((sampleRate * (MasterClock::getClockNanos() - firstSampleNanos)) / MasterClock::NANOS_PER_SECOND); if (frameCount < bufferSize) { usleep(ulong((MasterClock::MICROS_PER_SECOND * (bufferSize - frameCount)) / sampleRate)); continue; } else { frameCount = bufferSize; } } else { while (midiEventIx < midiEvents.count()) { const QMidiEvent &e = midiEvents.at(midiEventIx); bool eventPushed = true; MasterClockNanos nextEventNanos = midiNanos + e.getTimestamp() * midiTick; quint32 nextEventFrames = quint32(((double)sampleRate * nextEventNanos) / MasterClock::NANOS_PER_SECOND); frameCount = uint((sampleRate * (nextEventNanos - firstSampleNanos)) / MasterClock::NANOS_PER_SECOND); if (bufferSize < frameCount) { frameCount = bufferSize; break; } switch (e.getType()) { case SHORT_MESSAGE: eventPushed = synth->playMIDIShortMessage(e.getShortMessage(), nextEventFrames); break; case SYSEX: eventPushed = synth->playMIDISysex(e.getSysexData(), e.getSysexLen(), nextEventFrames); break; case SET_TEMPO: midiTick = parsers[parserIx].getMidiTick(e.getShortMessage()); break; default: break; } if (!eventPushed) { qDebug() << "AudioFileRenderer: MIDI buffer overflow, midiNanos:" << midiNanos; break; } midiNanos = nextEventNanos; midiEventIx++; emit midiEventProcessed(midiEventIx, midiEvents.count()); } if (midiEvents.count() <= midiEventIx) { if (parserIx < parsersCount - 1) { ++parserIx; midiEventIx = 0; midiEvents = parsers[parserIx].getMIDIEvents(); midiTick = parsers[parserIx].getMidiTick(); continue; } if (!synth->isActive() && frameCount == 0) break; frameCount += bufferSize; qDebug() << "AudioFileRenderer: Rendering after the end of MIDI file, time:" << (double)midiNanos / MasterClock::NANOS_PER_SECOND; } } while (frameCount > 0) { uint framesToRender = qMin(bufferSize, frameCount); synth->render(buffer, framesToRender); if (!writer.write(buffer, framesToRender)) { synth->close(); if (!realtimeMode) Master::getInstance()->setAudioFileWriterSynth(NULL); emit conversionFinished(); return; } firstSampleNanos += MasterClock::NANOS_PER_SECOND * framesToRender / sampleRate; frameCount -= framesToRender; if (!realtimeMode) qDebug() << "AudioFileWriter: Rendering time:" << (double)firstSampleNanos / MasterClock::NANOS_PER_SECOND; } } qDebug() << "AudioFileRenderer: Rendering finished"; if (!realtimeMode) qDebug() << "AudioFileRenderer: Elapsed seconds: " << 1e-9 * (MasterClock::getClockNanos() - startNanos); writer.close(); synth->close(); if (!realtimeMode) Master::getInstance()->setAudioFileWriterSynth(NULL); if (!stopProcessing) emit conversionFinished(); }