tdesktop/Telegram/SourceFiles/media/media_audio_loader.h

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/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org
Telegram Desktop 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/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#pragma once
class AudioPlayerLoader {
public:
AudioPlayerLoader(const FileLocation &file, const QByteArray &data);
virtual ~AudioPlayerLoader();
virtual bool check(const FileLocation &file, const QByteArray &data);
virtual bool open(qint64 &position) = 0;
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virtual TimeMs duration() = 0;
virtual int32 frequency() = 0;
virtual int32 format() = 0;
enum class ReadResult {
Error,
NotYet,
Ok,
Wait,
EndOfFile,
};
virtual ReadResult readMore(QByteArray &samples, int64 &samplesCount) = 0;
void saveDecodedSamples(QByteArray *samples, int64 *samplesCount);
void takeSavedDecodedSamples(QByteArray *samples, int64 *samplesCount);
bool holdsSavedDecodedSamples() const;
protected:
FileLocation file;
bool access = false;
QByteArray data;
QFile f;
int32 dataPos = 0;
bool openFile();
private:
QByteArray _savedSamples;
int64 _savedSamplesCount = 0;
bool _holdsSavedSamples = false;
};