Method exportToWav

BambooTracker/bamboo_tracker.cpp:1762–1823

}

bool BambooTracker::exportToWav(io::WavContainer& container, int loopCnt, ExportCancellCallback checkFunc)
{
	int tmpRate = opnaCtrl_->getRate();
	opnaCtrl_->setRate(static_cast<int>(container.getSampleRate()));
	size_t sampCnt = static_cast<size_t>(opnaCtrl_->getRate() * opnaCtrl_->getDuration() / 1000);
	size_t intrCnt = static_cast<size_t>(opnaCtrl_->getRate()) / mod_->getTickFrequency();
	size_t intrCntRest = 0;
	std::vector<int16_t> buf(sampCnt << 1);

	int endOrder, endStep;
	checkNextPositionOfLastStepAndStepSize(mod_->getSong(curSongNum_), endOrder, endStep);
	bool endFlag = false;
	bool tmpFollow = std::exchange(isFollowPlay_, false);
	startPlayFromStart();

	while (true) {
		size_t sampCntRest = sampCnt;
		while (sampCntRest) {
			if (!intrCntRest) {	// Interruption
				intrCntRest = intrCnt;    // Set counts to next interruption

				if (!streamCountUp()) {
					if (checkFunc()) {	// Update lambda function
						stopPlaySong();
						isFollowPlay_ = tmpFollow;
						opnaCtrl_->setRate(tmpRate);
						return false;
					}

					int playOrder = playback_->getPlayingOrderNumber();
					int playStep = playback_->getPlayingStepNumber();
					if ((playOrder == -1 && playStep == -1)
							|| (playOrder == endOrder && playStep == endStep && !(loopCnt--))){
						endFlag = true;
						break;
					}
				}
			}

			size_t count = std::min(intrCntRest, sampCntRest);
			sampCntRest -= count;
			intrCntRest -= count;

			bool result = opnaCtrl_->getStreamSamples(buf.data(), count);
			if (!result) {
				stopPlaySong();
				isFollowPlay_ = tmpFollow;
				opnaCtrl_->setRate(tmpRate);
				return false;
			}
			container.appendSample(buf.data(), count);
		}

		if (endFlag) break;
	}

	stopPlaySong();
	isFollowPlay_ = tmpFollow;