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95 lines
2.9 KiB
C++
95 lines
2.9 KiB
C++
/***
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This file is part of snapcast
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Copyright (C) 2014-2024 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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#pragma once
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#include <jack/jack.h>
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// local headers
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#include "pcm_stream.hpp"
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#include <server/server_settings.hpp>
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// 3rd party headers
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#include <boost/asio/io_context.hpp>
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#include <boost/asio/spawn.hpp>
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#include <boost/asio/steady_timer.hpp>
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namespace streamreader
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{
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/// Reads and decodes PCM data from a Jack server
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/**
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* Reads PCM from a Jack server and passes 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 PcmStream::Listener
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*/
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class JackStream : public PcmStream
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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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JackStream(PcmStream::Listener* pcmListener, boost::asio::io_context& ioc, const ServerSettings& server_settings, const StreamUri& uri);
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void start() override;
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void stop() override;
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protected:
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bool openJackConnection();
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void closeJackConnection();
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bool createJackPorts();
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void tryConnect();
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int readJackBuffers(jack_nframes_t nframes);
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void onJackPortRegistration(jack_port_id_t port_id, int registered);
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void onJackShutdown();
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void autoConnectPorts();
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std::string serverName_;
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jack_client_t* client_;
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std::vector<jack_port_t*> ports_;
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jack_nframes_t jackConnectFrames_;
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std::chrono::time_point<std::chrono::steady_clock> jackConnectTime_;
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jack_time_t jackTimeAdjust_;
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SampleFormat jackSampleFormat_;
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std::string autoConnectRegex_;
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bool doAutoConnect_ = false;
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int autoConnectSkip_;
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void (*interleave_func_)(char*, jack_default_audio_sample_t*, unsigned long, unsigned long);
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boost::asio::steady_timer read_timer_;
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std::chrono::microseconds silence_;
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/// send silent chunks to clients
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bool send_silence_;
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/// silence duration before switching the stream to idle
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std::chrono::milliseconds idle_threshold_;
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static int processCallback(jack_nframes_t nframes, void* arg);
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static void jackShutdown(void* arg);
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static void jackErrorMessage(const char* msg);
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static void jackInfoMessage(const char* msg);
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static void jackPortConnect(jack_port_id_t a, jack_port_id_t b, int connect, void* arg);
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static void jackPortRegistration(jack_port_id_t port_id, int registered, void* arg);
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};
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} // namespace streamreader
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