mirror of
https://github.com/badaix/snapcast.git
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149 lines
3.9 KiB
C++
149 lines
3.9 KiB
C++
/***
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This file is part of snapcast
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Copyright (C) 2014-2021 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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#include <cassert>
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#include <iostream>
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#include "common/aixlog.hpp"
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#include "common/snap_exception.hpp"
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#include "common/str_compat.hpp"
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#include "common/utils/string_utils.hpp"
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#include "file_player.hpp"
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using namespace std;
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namespace player
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{
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static constexpr auto LOG_TAG = "FilePlayer";
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static constexpr auto kDefaultBuffer = 50ms;
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static constexpr auto kDescription = "Raw PCM file output";
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std::vector<PcmDevice> FilePlayer::pcm_list(const std::string& parameter)
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{
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auto params = utils::string::split_pairs(parameter, ',', '=');
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string filename;
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if (params.find("filename") != params.end())
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filename = params["filename"];
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if (filename.empty())
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filename = "stdout";
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return {PcmDevice{0, filename, kDescription}};
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}
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FilePlayer::FilePlayer(boost::asio::io_context& io_context, const ClientSettings::Player& settings, std::shared_ptr<Stream> stream)
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: Player(io_context, settings, stream), timer_(io_context), file_(nullptr)
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{
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auto params = utils::string::split_pairs(settings.parameter, ',', '=');
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string filename;
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if (params.find("filename") != params.end())
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filename = params["filename"];
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if (filename.empty() || (filename == "stdout"))
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{
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file_.reset(stdout, [](auto p) { std::ignore = p; });
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}
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else if (filename == "stderr")
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{
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file_.reset(stderr, [](auto p) { std::ignore = p; });
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}
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else if (filename != "null")
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{
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std::string mode = "w";
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if (params.find("mode") != params.end())
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mode = params["mode"];
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if ((mode != "w") && (mode != "a"))
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throw SnapException("Mode must be w (write) or a (append)");
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mode += "b";
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file_.reset(fopen(filename.c_str(), mode.c_str()), [](auto p) { fclose(p); });
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if (!file_)
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throw SnapException("Error opening file: '" + filename + "', error: " + cpt::to_string(errno));
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}
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}
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FilePlayer::~FilePlayer()
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{
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LOG(DEBUG, LOG_TAG) << "Destructor\n";
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stop();
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}
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bool FilePlayer::needsThread() const
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{
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return false;
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}
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void FilePlayer::requestAudio()
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{
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auto numFrames = static_cast<uint32_t>(stream_->getFormat().msRate() * kDefaultBuffer.count());
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auto needed = numFrames * stream_->getFormat().frameSize();
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if (buffer_.size() < needed)
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buffer_.resize(needed);
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if (!stream_->getPlayerChunkOrSilence(buffer_.data(), 10ms, numFrames))
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{
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// LOG(INFO, LOG_TAG) << "Failed to get chunk. Playing silence.\n";
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}
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else
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{
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adjustVolume(static_cast<char*>(buffer_.data()), numFrames);
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}
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if (file_)
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{
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fwrite(buffer_.data(), 1, needed, file_.get());
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fflush(file_.get());
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}
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loop();
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}
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void FilePlayer::loop()
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{
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next_request_ += kDefaultBuffer;
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auto now = std::chrono::steady_clock::now();
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if (next_request_ < now)
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next_request_ = now + 1ms;
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timer_.expires_at(next_request_);
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timer_.async_wait([this](boost::system::error_code ec) {
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if (ec)
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return;
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requestAudio();
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});
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}
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void FilePlayer::start()
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{
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next_request_ = std::chrono::steady_clock::now();
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loop();
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}
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void FilePlayer::stop()
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{
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LOG(INFO, LOG_TAG) << "Stop\n";
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timer_.cancel();
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}
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} // namespace player
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