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snapcast/client/player/opensl_player.hpp
2022-01-30 21:45:00 +01:00

87 lines
2.2 KiB
C++

/***
This file is part of snapcast
Copyright (C) 2014-2022 Johannes Pohl
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/>.
***/
#ifndef OPEN_SL_PLAYER_HPP
#define OPEN_SL_PLAYER_HPP
// local headers
#include "player.hpp"
// 3rd party headers
#include <SLES/OpenSLES.h>
#include <SLES/OpenSLES_Android.h>
// standard headers
#include <string>
namespace player
{
static constexpr auto OPENSL = "opensl";
typedef int (*AndroidAudioCallback)(short* buffer, int num_samples);
/// OpenSL Audio Player
/**
* Player implementation for OpenSL (e.g. Android)
*/
class OpenslPlayer : public Player
{
public:
OpenslPlayer(boost::asio::io_context& io_context, const ClientSettings::Player& settings, std::shared_ptr<Stream> stream);
virtual ~OpenslPlayer();
void start() override;
void stop() override;
void playerCallback(SLAndroidSimpleBufferQueueItf bq);
protected:
void initOpensl();
void uninitOpensl();
bool needsThread() const override;
void throwUnsuccess(const std::string& phase, const std::string& what, SLresult result);
std::string resultToString(SLresult result) const;
// engine interfaces
SLObjectItf engineObject;
SLEngineItf engineEngine;
SLObjectItf outputMixObject;
// buffer queue player interfaces
SLObjectItf bqPlayerObject;
SLPlayItf bqPlayerPlay;
SLAndroidSimpleBufferQueueItf bqPlayerBufferQueue;
SLVolumeItf bqPlayerVolume;
// Double buffering.
int curBuffer;
char* buffer[2];
size_t ms_;
size_t frames_;
size_t buff_size;
std::shared_ptr<Stream> pubStream_;
};
} // namespace player
#endif