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snapcast/client/controller.cpp

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/***
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 NOMINMAX
#define NOMINMAX
#endif // NOMINMAX
#include "controller.hpp"
#include "decoder/pcm_decoder.hpp"
#if defined(HAS_OGG) && (defined(HAS_TREMOR) || defined(HAS_VORBIS))
#include "decoder/ogg_decoder.hpp"
#endif
#if defined(HAS_FLAC)
#include "decoder/flac_decoder.hpp"
#endif
#if defined(HAS_OPUS)
#include "decoder/opus_decoder.hpp"
#endif
#include "browseZeroConf/browse_mdns.hpp"
#include "common/aixlog.hpp"
#include "common/snap_exception.hpp"
#include "message/client_settings.hpp"
#include "message/hello.hpp"
#include "message/time.hpp"
#include "time_provider.hpp"
#include <algorithm>
#include <iostream>
#include <memory>
#include <string>
using namespace std;
static constexpr auto LOG_TAG = "Controller";
Controller::Controller(boost::asio::io_context& io_context, const ClientSettings& settings, std::unique_ptr<MetadataAdapter> meta)
: io_context_(io_context), timer_(io_context), settings_(settings), stream_(nullptr), decoder_(nullptr), player_(nullptr), meta_(std::move(meta)),
serverSettings_(nullptr)
{
}
void Controller::getNextMessage()
{
clientConnection_->getNextMessage([this](const boost::system::error_code& ec, std::unique_ptr<msg::BaseMessage> response) {
if (!ec)
{
if (response->type == message_type::kWireChunk)
{
if (stream_ && decoder_)
{
// auto wireChunk = msg::message_cast<msg::WireChunk>(std::move(response));
auto pcmChunk = msg::message_cast<msg::PcmChunk>(std::move(response));
pcmChunk->format = sampleFormat_;
// std::make_unique<msg::PcmChunk>(sampleFormat_, *wireChunk);
// pcmChunk->deserialize(baseMessage, buffer);
// LOG(TRACE, LOG_TAG) << "chunk: " << pcmChunk->payloadSize << ", sampleFormat: " << sampleFormat_.getFormat() << "\n";
if (decoder_->decode(pcmChunk.get()))
{
// LOG(TRACE, LOG_TAG) << ", decoded: " << pcmChunk->payloadSize << ", Duration: " << pcmChunk->durationMs()
// << ", sec: " << pcmChunk->timestamp.sec << ", usec: " << pcmChunk->timestamp.usec / 1000 << ", type: " <<
// pcmChunk->type
// << "\n";
stream_->addChunk(std::move(pcmChunk));
}
}
}
else if (response->type == message_type::kTime)
{
// should not be called, because timeSync messages are sent as request, so that the response will go there
LOG(DEBUG, LOG_TAG) << "Received time sync message\n";
auto reply = msg::message_cast<msg::Time>(std::move(response));
TimeProvider::getInstance().setDiff(reply->latency, reply->received - reply->sent); // ToServer(diff / 2);
}
else if (response->type == message_type::kServerSettings)
{
serverSettings_ = msg::message_cast<msg::ServerSettings>(std::move(response));
LOG(INFO, LOG_TAG) << "ServerSettings - buffer: " << serverSettings_->getBufferMs() << ", latency: " << serverSettings_->getLatency()
<< ", volume: " << serverSettings_->getVolume() << ", muted: " << serverSettings_->isMuted() << "\n";
if (stream_ && player_)
{
player_->setVolume(serverSettings_->getVolume() / 100.);
player_->setMute(serverSettings_->isMuted());
stream_->setBufferLen(std::max(0, serverSettings_->getBufferMs() - serverSettings_->getLatency() - settings_.player.latency));
}
}
else if (response->type == message_type::kCodecHeader)
{
headerChunk_ = msg::message_cast<msg::CodecHeader>(std::move(response));
LOG(INFO, LOG_TAG) << "Codec: " << headerChunk_->codec << "\n";
decoder_.reset(nullptr);
stream_ = nullptr;
player_.reset(nullptr);
if (headerChunk_->codec == "pcm")
decoder_ = make_unique<decoder::PcmDecoder>();
#if defined(HAS_OGG) && (defined(HAS_TREMOR) || defined(HAS_VORBIS))
else if (headerChunk_->codec == "ogg")
decoder_ = make_unique<decoder::OggDecoder>();
#endif
#if defined(HAS_FLAC)
else if (headerChunk_->codec == "flac")
decoder_ = make_unique<decoder::FlacDecoder>();
#endif
#if defined(HAS_OPUS)
else if (headerChunk_->codec == "opus")
decoder_ = make_unique<decoder::OpusDecoder>();
#endif
else
throw SnapException("codec not supported: \"" + headerChunk_->codec + "\"");
sampleFormat_ = decoder_->setHeader(headerChunk_.get());
LOG(NOTICE, LOG_TAG) << TAG("state") << "sampleformat: " << sampleFormat_.getFormat() << "\n";
stream_ = make_shared<Stream>(sampleFormat_, settings_.player.sample_format);
stream_->setBufferLen(std::max(0, serverSettings_->getBufferMs() - serverSettings_->getLatency() - settings_.player.latency));
const auto& player_settings = settings_.player;
const auto& player_name = settings_.player.player_name;
player_ = nullptr;
#ifdef HAS_ALSA
if (!player_ && (player_name.empty() || (player_name == "alsa")))
player_ = make_unique<AlsaPlayer>(io_context_, player_settings, stream_);
#endif
#ifdef HAS_OBOE
if (!player_ && (player_name.empty() || (player_name == "oboe")))
player_ = make_unique<OboePlayer>(io_context_, player_settings, stream_);
#endif
#ifdef HAS_OPENSL
if (!player_ && (player_name.empty() || (player_name == "opensl")))
player_ = make_unique<OpenslPlayer>(io_context_, player_settings, stream_);
#endif
#ifdef HAS_COREAUDIO
if (!player_ && (player_name.empty() || (player_name == "coreaudio")))
player_ = make_unique<CoreAudioPlayer>(io_context_, player_settings, stream_);
#endif
#ifdef HAS_WASAPI
if (!player_ && (player_name.empty() || (player_name == "wasapi")))
player_ = make_unique<WASAPIPlayer>(io_context_, player_settings, stream_);
#endif
if (!player_)
throw SnapException("No audio player support");
player_->setVolumeCallback([this](double volume, bool muted) {
static double last_volume(-1);
static bool last_muted(true);
if ((volume != last_volume) || (last_muted != muted))
{
last_volume = volume;
last_muted = muted;
auto settings = std::make_shared<msg::ClientSettings>();
settings->setVolume(static_cast<uint16_t>(volume * 100.));
settings->setMuted(muted);
clientConnection_->send(settings, [this](const boost::system::error_code& ec) {
if (ec)
{
LOG(ERROR, LOG_TAG) << "Failed to send client settings, error: " << ec.message() << "\n";
reconnect();
return;
}
});
}
});
player_->start();
// Don't change the initial hardware mixer volume on the user's device.
// The player class will send the device's volume to the server instead
if (settings_.player.mixer.mode != ClientSettings::Mixer::Mode::hardware)
{
player_->setVolume(serverSettings_->getVolume() / 100.);
player_->setMute(serverSettings_->isMuted());
}
}
else if (response->type == message_type::kStreamTags)
{
if (meta_)
{
auto stream_tags = msg::message_cast<msg::StreamTags>(std::move(response));
meta_->push(stream_tags->msg);
}
}
getNextMessage();
}
else
{
reconnect();
}
});
}
void Controller::sendTimeSyncMessage(int quick_syncs)
{
auto timeReq = std::make_shared<msg::Time>();
clientConnection_->sendRequest<msg::Time>(timeReq, 2s, [this, quick_syncs](const boost::system::error_code& ec,
const std::unique_ptr<msg::Time>& response) mutable {
if (ec)
{
LOG(ERROR, LOG_TAG) << "Time sync request failed: " << ec.message() << "\n";
reconnect();
return;
}
else
{
TimeProvider::getInstance().setDiff(response->latency, response->received - response->sent);
}
std::chrono::microseconds next = 1s;
if (quick_syncs > 0)
{
if (--quick_syncs == 0)
LOG(INFO, LOG_TAG) << "diff to server [ms]: " << (float)TimeProvider::getInstance().getDiffToServer<chronos::usec>().count() / 1000.f << "\n";
next = 100us;
}
timer_.expires_after(next);
timer_.async_wait([this, quick_syncs](const boost::system::error_code& ec) {
if (!ec)
{
sendTimeSyncMessage(quick_syncs);
}
});
});
}
void Controller::browseMdns(const MdnsHandler& handler)
{
#if defined(HAS_AVAHI) || defined(HAS_BONJOUR)
try
{
BrowseZeroConf browser;
mDNSResult avahiResult;
if (browser.browse("_snapcast._tcp", avahiResult, 1000))
{
string host = avahiResult.ip;
uint16_t port = avahiResult.port;
if (avahiResult.ip_version == IPVersion::IPv6)
host += "%" + cpt::to_string(avahiResult.iface_idx);
handler({}, host, port);
return;
}
}
catch (const std::exception& e)
{
LOG(ERROR, LOG_TAG) << "Exception: " << e.what() << std::endl;
}
timer_.expires_after(500ms);
timer_.async_wait([this, handler](const boost::system::error_code& ec) {
if (!ec)
{
browseMdns(handler);
}
else
{
handler(ec, "", 0);
}
});
#else
handler(boost::asio::error::operation_not_supported, "", 0);
#endif
}
void Controller::start()
{
if (settings_.server.host.empty())
{
browseMdns([this](const boost::system::error_code& ec, const std::string& host, uint16_t port) {
if (ec)
{
LOG(ERROR, LOG_TAG) << "Failed to browse MDNS, error: " << ec.message() << "\n";
}
else
{
settings_.server.host = host;
settings_.server.port = port;
LOG(INFO, LOG_TAG) << "Found server " << settings_.server.host << ":" << settings_.server.port << "\n";
clientConnection_ = make_unique<ClientConnection>(io_context_, settings_.server);
worker();
}
});
}
else
{
clientConnection_ = make_unique<ClientConnection>(io_context_, settings_.server);
worker();
}
}
// void Controller::stop()
// {
// LOG(DEBUG, LOG_TAG) << "Stopping\n";
// timer_.cancel();
// }
void Controller::reconnect()
{
timer_.cancel();
clientConnection_->disconnect();
player_.reset();
stream_.reset();
decoder_.reset();
timer_.expires_after(1s);
timer_.async_wait([this](const boost::system::error_code& ec) {
if (!ec)
{
worker();
}
});
}
void Controller::worker()
{
clientConnection_->connect([this](const boost::system::error_code& ec) {
if (!ec)
{
LOG(INFO, LOG_TAG) << "Connected!\n";
string macAddress = clientConnection_->getMacAddress();
if (settings_.host_id.empty())
settings_.host_id = ::getHostId(macAddress);
// Say hello to the server
auto hello = std::make_shared<msg::Hello>(macAddress, settings_.host_id, settings_.instance);
clientConnection_->send(hello, [this](const boost::system::error_code& ec) {
if (ec)
{
LOG(ERROR, LOG_TAG) << "Failed to send hello, error: " << ec.message() << "\n";
reconnect();
return;
}
});
// // Do initial time sync with the server
sendTimeSyncMessage(50);
getNextMessage();
}
else
{
LOG(ERROR, LOG_TAG) << "Error: " << ec.message() << "\n";
reconnect();
}
});
}
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