/*
 * Oak Video Editor - Non-Linear Video Editor
 * Copyright (C) 2025 Olive CE Team
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "previewaudiodevice.h"

namespace olive
{

PreviewAudioDevice::PreviewAudioDevice(QObject *parent)
	: notify_interval_(0)
	, bytes_read_(0)
{
}

PreviewAudioDevice::~PreviewAudioDevice()
{
	close();
}

bool PreviewAudioDevice::isSequential() const
{
	return true;
}

qint64 PreviewAudioDevice::readData(char *data, qint64 maxSize)
{
	QMutexLocker locker(&lock_);

	qint64 copy_length = qMin(maxSize, qint64(buffer_.size()));

	if (copy_length) {
		qint64 new_bytes_read = bytes_read_ + copy_length;

		if (notify_interval_ > 0) {
			if ((bytes_read_ / notify_interval_) !=
				(new_bytes_read / notify_interval_)) {
				emit Notify();
			}
		}

		bytes_read_ = new_bytes_read;

		memcpy(data, buffer_.constData(), copy_length);
		buffer_ = buffer_.mid(copy_length);
	}

	return copy_length;
}

qint64 PreviewAudioDevice::writeData(const char *data, qint64 length)
{
	QMutexLocker locker(&lock_);

	buffer_.append(data, length);

	return length;
}

void PreviewAudioDevice::clear()
{
	QMutexLocker locker(&lock_);

	buffer_.clear();
	bytes_read_ = 0;
}

}
