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79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
/***
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This file is part of snapcast
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Copyright (C) 2015 Johannes Pohl
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#ifndef PIPE_READER_H
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#define PIPE_READER_H
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#include <thread>
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#include <atomic>
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#include <string>
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#include "encoder/encoder.h"
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#include "message/sampleFormat.h"
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#include "message/header.h"
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class PipeReader;
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/// Callback interface for users of PipeReader
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/**
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* Users of PipeReader should implement this to get the data
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*/
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class PipeListener
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{
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public:
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virtual void onChunkRead(const PipeReader* pipeReader, const msg::PcmChunk* chunk, double duration) = 0;
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virtual void onResync(const PipeReader* pipeReader, double ms) = 0;
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};
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/// Reads and decodes PCM data from a named pipe
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/**
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* Reads PCM from a named pipe and passed the data to an encoder.
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* Implements EncoderListener to get the encoded data.
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* Data is passed to the PipeListener
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*/
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class PipeReader : public EncoderListener
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{
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public:
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/// ctor. Encoded PCM data is passed to the PipeListener
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PipeReader(PipeListener* pipeListener, const msg::SampleFormat& sampleFormat, const std::string& codec, const std::string& fifoName, size_t pcmReadMs = 20);
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virtual ~PipeReader();
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void start();
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void stop();
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/// Implementation of EncoderListener::onChunkEncoded
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virtual void onChunkEncoded(const Encoder* encoder, msg::PcmChunk* chunk, double duration);
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msg::Header* getHeader();
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protected:
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void worker();
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int fd_;
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timeval tvEncodedChunk_;
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std::atomic<bool> active_;
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std::thread readerThread_;
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PipeListener* pipeListener_;
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msg::SampleFormat sampleFormat_;
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size_t pcmReadMs_;
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std::unique_ptr<Encoder> encoder_;
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};
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#endif
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