//
// This file is part of Kepka,
// an unofficial desktop version of Telegram messaging app,
// see https://github.com/procxx/kepka
//
// Kepka 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.
//
// It 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.
//
// In addition, as a special exception, the copyright holders give permission
// to link the code of portions of this program with the OpenSSL library.
//
// Full license: https://github.com/procxx/kepka/blob/master/LICENSE
// Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
// Copyright (c) 2017- Kepka Contributors, https://github.com/procxx
//
#include "media/media_audio_loader.h"

AudioPlayerLoader::AudioPlayerLoader(const FileLocation &file, const QByteArray &data, base::byte_vector &&bytes)
    : _file(file)
    , _data(data)
    , _bytes(std::move(bytes)) {}

AudioPlayerLoader::~AudioPlayerLoader() {
	if (_access) {
		_file.accessDisable();
		_access = false;
	}
}

bool AudioPlayerLoader::check(const FileLocation &file, const QByteArray &data) {
	return this->_file == file && this->_data.size() == data.size();
}

void AudioPlayerLoader::saveDecodedSamples(QByteArray *samples, qint64 *samplesCount) {
	Assert(_savedSamplesCount == 0);
	Assert(_savedSamples.isEmpty());
	Assert(!_holdsSavedSamples);
	samples->swap(_savedSamples);
	std::swap(*samplesCount, _savedSamplesCount);
	_holdsSavedSamples = true;
}

void AudioPlayerLoader::takeSavedDecodedSamples(QByteArray *samples, qint64 *samplesCount) {
	Assert(*samplesCount == 0);
	Assert(samples->isEmpty());
	Assert(_holdsSavedSamples);
	samples->swap(_savedSamples);
	std::swap(*samplesCount, _savedSamplesCount);
	_holdsSavedSamples = false;
}

bool AudioPlayerLoader::holdsSavedDecodedSamples() const {
	return _holdsSavedSamples;
}

bool AudioPlayerLoader::openFile() {
	if (_data.isEmpty() && _bytes.empty()) {
		if (_f.isOpen()) _f.close();
		if (!_access) {
			if (!_file.accessEnable()) {
				LOG(("Audio Error: could not open file access '%1', data size '%2', error %3, %4")
				        .arg(_file.name())
				        .arg(_data.size())
				        .arg(_f.error())
				        .arg(_f.errorString()));
				return false;
			}
			_access = true;
		}
		_f.setFileName(_file.name());
		if (!_f.open(QIODevice::ReadOnly)) {
			LOG(("Audio Error: could not open file '%1', data size '%2', error %3, %4")
			        .arg(_file.name())
			        .arg(_data.size())
			        .arg(_f.error())
			        .arg(_f.errorString()));
			return false;
		}
	}
	_dataPos = 0;
	return true;
}