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Add control_script to stream sources

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New parameter "control_script", starting a script on stream start.
Parameters "--snapcast-port" and "--stream" are passed to the script
This commit is contained in:
badaix 2021-05-23 12:39:47 +02:00
parent ec73bfb6d6
commit 2e64d81f79
25 changed files with 265 additions and 95 deletions
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82
server/streamreader/pcm_stream.hpp
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@ -1,6 +1,6 @@
/***
This file is part of snapcast
Copyright (C) 2014-2020 Johannes Pohl
Copyright (C) 2014-2021 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
@ -19,18 +19,32 @@
#ifndef PCM_STREAM_HPP
#define PCM_STREAM_HPP
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-result"
#pragma GCC diagnostic ignored "-Wunused-parameter"
#pragma GCC diagnostic ignored "-Wmissing-braces"
#include <boost/process.hpp>
#pragma GCC diagnostic pop
#include <atomic>
#include <condition_variable>
#include <map>
#include <string>
#include <vector>
#include <boost/asio/io_context.hpp>
#include <boost/asio/read_until.hpp>
#include <boost/optional.hpp>
#include "common/json.hpp"
#include "common/sample_format.hpp"
#include "encoder/encoder.hpp"
#include "message/codec_header.hpp"
#include "message/stream_tags.hpp"
#include "server_settings.hpp"
#include "stream_uri.hpp"
#include <atomic>
#include <boost/asio/io_context.hpp>
#include <condition_variable>
#include <map>
#include <string>
#include <vector>
namespace bp = boost::process;
namespace streamreader
@ -46,30 +60,37 @@ enum class ReaderState
kDisabled = 3
};
static std::ostream& operator<<(std::ostream& os, const ReaderState& reader_state)
static std::string to_string(const ReaderState& reader_state)
{
switch (reader_state)
{
case ReaderState::kIdle:
os << "idle";
break;
return "idle";
case ReaderState::kPlaying:
os << "playing";
break;
return "playing";
case ReaderState::kDisabled:
os << "disabled";
break;
return "disabled";
case ReaderState::kUnknown:
default:
os << "unknown";
return "unknown";
}
}
static std::ostream& operator<<(std::ostream& os, const ReaderState& reader_state)
{
os << to_string(reader_state);
return os;
}
static constexpr auto kUriCodec = "codec";
static constexpr auto kUriName = "name";
static constexpr auto kUriSampleFormat = "sampleformat";
static constexpr auto kUriChunkMs = "chunk_ms";
static constexpr auto kControlScript = "controlscript";
/// Callback interface for users of PcmStream
@ -87,6 +108,33 @@ public:
};
class CtrlScript
{
public:
CtrlScript(boost::asio::io_context& ioc, const std::string& script);
virtual ~CtrlScript();
void start(const std::string& stream_id, const ServerSettings& server_setttings);
void stop();
private:
void stderrReadLine();
void stdoutReadLine();
void logScript(const std::string& source, std::string line);
bp::child process_;
bp::pipe pipe_stdout_;
bp::pipe pipe_stderr_;
std::unique_ptr<boost::asio::posix::stream_descriptor> stream_stdout_;
std::unique_ptr<boost::asio::posix::stream_descriptor> stream_stderr_;
boost::asio::streambuf streambuf_stdout_;
boost::asio::streambuf streambuf_stderr_;
boost::asio::io_context& ioc_;
std::string script_;
};
/// Reads and decodes PCM data
/**
* Reads PCM and passes the data to an encoder.
@ -97,7 +145,7 @@ class PcmStream
{
public:
/// ctor. Encoded PCM data is passed to the PcmListener
PcmStream(PcmListener* pcmListener, boost::asio::io_context& ioc, const StreamUri& uri);
PcmStream(PcmListener* pcmListener, boost::asio::io_context& ioc, const ServerSettings& server_settings, const StreamUri& uri);
virtual ~PcmStream();
virtual void start();
@ -137,6 +185,8 @@ protected:
ReaderState state_;
std::shared_ptr<msg::StreamTags> meta_;
boost::asio::io_context& ioc_;
ServerSettings server_settings_;
std::unique_ptr<CtrlScript> ctrl_script_;
};
} // namespace streamreader