snapcast/server/streamreader/meta_stream.hpp
2020-09-26 12:44:33 +02:00

64 lines
2.1 KiB
C++

/***
This file is part of snapcast
Copyright (C) 2014-2020 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 META_STREAM_HPP
#define META_STREAM_HPP
#include "posix_stream.hpp"
#include "resampler.hpp"
#include <memory>
namespace streamreader
{
/// Reads and decodes PCM data
/**
* Reads PCM and passes the data to an encoder.
* Implements EncoderListener to get the encoded data.
* Data is passed to the PcmListener
*/
class MetaStream : public PcmStream, public PcmListener
{
public:
/// ctor. Encoded PCM data is passed to the PcmListener
MetaStream(PcmListener* pcmListener, std::vector<std::shared_ptr<PcmStream>> streams, boost::asio::io_context& ioc, const StreamUri& uri);
virtual ~MetaStream();
virtual void start();
virtual void stop();
protected:
/// Implementation of PcmListener
void onMetaChanged(const PcmStream* pcmStream) override;
void onStateChanged(const PcmStream* pcmStream, ReaderState state) override;
void onChunkRead(const PcmStream* pcmStream, const msg::PcmChunk& chunk) override;
void onChunkEncoded(const PcmStream* pcmStream, std::shared_ptr<msg::PcmChunk> chunk, double duration) override;
void onResync(const PcmStream* pcmStream, double ms) override;
protected:
std::vector<std::shared_ptr<PcmStream>> streams_;
std::shared_ptr<PcmStream> active_stream_;
std::mutex mutex_;
std::unique_ptr<Resampler> resampler_;
bool first_read_;
};
} // namespace streamreader
#endif