/***

  Olive - Non-Linear Video Editor
  Copyright (C) 2022 Olive Team
  Modifications Copyright (C) 2025 mikesolar

  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)
	: QIODevice(parent)
	, bytes_per_frame_(0)
	, notify_interval_(0)
	, bytes_read_(0)
{
}

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

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

void PreviewAudioDevice::set_params(const core::AudioParams &params)
{
	set_bytes_per_frame(params.samples_to_bytes(1));
}

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

	qint64 copy_length = qMin(max_size, 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;
	output_frames_consumed_.store(0);
}

}