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/***
This file is part of snapcast
Copyright (C) 2014-2024 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/>.
***/
// prototype/interface header file
#include "stream_manager.hpp"
// local headers
#include "airplay_stream.hpp"
#ifdef HAS_ALSA
#include "alsa_stream.hpp"
#endif
#ifdef HAS_JACK
#include "jack_stream.hpp"
#endif
#include "common/snap_exception.hpp"
#include "common/str_compat.hpp"
#include "file_stream.hpp"
#include "librespot_stream.hpp"
#include "meta_stream.hpp"
#include "pipe_stream.hpp"
#include "process_stream.hpp"
#include "tcp_stream.hpp"
// 3rd party headers
// standard headers
using namespace std;
namespace streamreader
{
StreamManager::StreamManager(PcmStream::Listener* pcmListener, boost::asio::io_context& ioc, const ServerSettings& settings)
// const std::string& defaultSampleFormat, const std::string& defaultCodec, size_t defaultChunkBufferMs)
: pcmListener_(pcmListener), settings_(settings), io_context_(ioc)
{
}
PcmStreamPtr StreamManager::addStream(const std::string& uri)
{
StreamUri streamUri(uri);
return addStream(streamUri);
}
PcmStreamPtr StreamManager::addStream(StreamUri& streamUri)
{
if (streamUri.query.find(kUriSampleFormat) == streamUri.query.end())
streamUri.query[kUriSampleFormat] = settings_.stream.sampleFormat;
if (streamUri.query.find(kUriCodec) == streamUri.query.end())
streamUri.query[kUriCodec] = settings_.stream.codec;
if (streamUri.query.find(kUriChunkMs) == streamUri.query.end())
streamUri.query[kUriChunkMs] = cpt::to_string(settings_.stream.streamChunkMs);
// LOG(DEBUG) << "\nURI: " << streamUri.uri << "\nscheme: " << streamUri.scheme << "\nhost: "
// << streamUri.host << "\npath: " << streamUri.path << "\nfragment: " << streamUri.fragment << "\n";
// for (auto kv: streamUri.query)
// LOG(DEBUG) << "key: '" << kv.first << "' value: '" << kv.second << "'\n";
PcmStreamPtr stream(nullptr);
PcmStream::Listener* listener = pcmListener_;
if ((streamUri.query[kUriCodec] == "null") && (streamUri.scheme != "meta"))
{
// Streams with null codec are "invisible" and will not report any updates to the listener.
// If the stream is used as input for a Meta stream, then the meta stream will add himself
// as another listener to the stream, so that updates are indirect reported through it.
listener = nullptr;
}
if (streamUri.scheme == "pipe")
{
stream = make_shared<PipeStream>(listener, io_context_, settings_, streamUri);
}
else if (streamUri.scheme == "file")
{
stream = make_shared<FileStream>(listener, io_context_, settings_, streamUri);
}
else if (streamUri.scheme == "process")
{
stream = make_shared<ProcessStream>(listener, io_context_, settings_, streamUri);
}
#ifdef HAS_ALSA
else if (streamUri.scheme == "alsa")
{
stream = make_shared<AlsaStream>(listener, io_context_, settings_, streamUri);
}
#endif
#ifdef HAS_JACK
else if (streamUri.scheme == "jack")
{
stream = make_shared<JackStream>(listener, io_context_, settings_, streamUri);
}
#endif
else if ((streamUri.scheme == "spotify") || (streamUri.scheme == "librespot"))
{
// Overwrite sample format here instead of inside the constructor, to make sure
// that all constructors of all parent classes also use the overwritten sample
// format.
streamUri.query[kUriSampleFormat] = "44100:16:2";
stream = make_shared<LibrespotStream>(listener, io_context_, settings_, streamUri);
}
else if (streamUri.scheme == "airplay")
{
// Overwrite sample format here instead of inside the constructor, to make sure
// that all constructors of all parent classes also use the overwritten sample
// format.
streamUri.query[kUriSampleFormat] = "44100:16:2";
stream = make_shared<AirplayStream>(listener, io_context_, settings_, streamUri);
}
else if (streamUri.scheme == "tcp")
{
stream = make_shared<TcpStream>(listener, io_context_, settings_, streamUri);
}
else if (streamUri.scheme == "meta")
{
stream = make_shared<MetaStream>(listener, streams_, io_context_, settings_, streamUri);
}
else
{
throw SnapException("Unknown stream type: " + streamUri.scheme);
}
if (stream)
{
for (const auto& s : streams_)
{
if (s->getName() == stream->getName())
throw SnapException("Stream with name \"" + stream->getName() + "\" already exists");
}
streams_.push_back(stream);
}
return stream;
}
void StreamManager::removeStream(const std::string& name)
{
auto iter = std::find_if(streams_.begin(), streams_.end(), [&name](const PcmStreamPtr& stream) { return stream->getName() == name; });
if (iter != streams_.end())
{
(*iter)->stop();
streams_.erase(iter);
}
}
const std::vector<PcmStreamPtr>& StreamManager::getStreams() const
{
return streams_;
}
const PcmStreamPtr StreamManager::getDefaultStream() const
{
if (streams_.empty())
return nullptr;
for (const auto& stream : streams_)
{
if (stream->getCodec() != "null")
return stream;
}
return nullptr;
}
const PcmStreamPtr StreamManager::getStream(const std::string& id) const
{
for (auto stream : streams_)
{
if (stream->getId() == id)
return stream;
}
return nullptr;
}
void StreamManager::start()
{
// Start meta streams first
for (const auto& stream : streams_)
if (stream->getUri().scheme == "meta")
stream->start();
// Start normal streams second
for (const auto& stream : streams_)
if (stream->getUri().scheme != "meta")
stream->start();
}
void StreamManager::stop()
{
// Stop normal streams first
for (const auto& stream : streams_)
if (stream && (stream->getUri().scheme != "meta"))
stream->stop();
// Stop meta streams second
for (const auto& stream : streams_)
if (stream && (stream->getUri().scheme == "meta"))
stream->stop();
}
json StreamManager::toJson() const
{
json result = json::array();
for (const auto& stream : streams_)
{
// A stream with "null" codec will only serve as input for a meta stream, i.e. is not a "stand alone" stream
if (stream->getCodec() != "null")
result.push_back(stream->toJson());
}
return result;
}
} // namespace streamreader
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