mirror of
https://github.com/badaix/snapcast.git
synced 2025-05-01 11:17:36 +02:00
146 lines
4.3 KiB
C++
146 lines
4.3 KiB
C++
/***
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This file is part of snapcast
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Copyright (C) 2014-2019 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 <cerrno>
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#include <fcntl.h>
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#include <memory>
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#include <sys/stat.h>
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#include <unistd.h>
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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 "pipe_stream.hpp"
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using namespace std;
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PipeStream::PipeStream(PcmListener* pcmListener, boost::asio::io_context& ioc, const StreamUri& uri) : AsioStream<stream_descriptor>(pcmListener, ioc, uri)
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{
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umask(0);
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string mode = uri_.getQuery("mode", "create");
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LOG(INFO) << "PipeStream mode: " << mode << "\n";
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if ((mode != "read") && (mode != "create"))
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throw SnapException("create mode for fifo must be \"read\" or \"create\"");
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if (mode == "create")
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{
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if ((mkfifo(uri_.path.c_str(), 0666) != 0) && (errno != EEXIST))
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throw SnapException("failed to make fifo \"" + uri_.path + "\": " + cpt::to_string(errno));
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}
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chunk_ = make_unique<msg::PcmChunk>(sampleFormat_, chunk_ms_);
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}
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void PipeStream::connect()
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{
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LOG(DEBUG) << "connect\n";
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auto self = shared_from_this();
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fd_ = open(uri_.path.c_str(), O_RDONLY | O_NONBLOCK);
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stream_ = std::make_unique<boost::asio::posix::stream_descriptor>(ioc_, fd_);
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on_connect();
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}
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void PipeStream::disconnect()
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{
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stream_->close();
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}
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void PipeStream::do_read()
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{
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auto self = this->shared_from_this();
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try
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{
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if (fd_ == -1)
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throw SnapException("failed to open fifo: \"" + uri_.path + "\"");
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int toRead = chunk_->payloadSize;
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int len = 0;
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do
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{
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int count = read(fd_, chunk_->payload + len, toRead - len);
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if (count < 0)
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{
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LOG(DEBUG) << "count < 0: " << errno
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<< " && idleBytes < maxIdleBytes, ms: " << 1000 * chunk_->payloadSize / (sampleFormat_.rate * sampleFormat_.frameSize) << "\n";
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memset(chunk_->payload + len, 0, toRead - len);
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len += toRead - len;
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break;
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}
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else if (count == 0)
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{
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throw SnapException("end of file");
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}
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else
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{
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// LOG(DEBUG) << "count: " << count << "\n";
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len += count;
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bytes_read_ += len;
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}
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} while (len < toRead);
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if (first_)
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{
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first_ = false;
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chronos::systemtimeofday(&tvEncodedChunk_);
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nextTick_ = chronos::getTickCount() + buffer_ms_;
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}
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encoder_->encode(chunk_.get());
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nextTick_ += chunk_ms_;
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long currentTick = chronos::getTickCount();
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if (nextTick_ >= currentTick)
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{
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read_timer_.expires_after(std::chrono::milliseconds(nextTick_ - currentTick));
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read_timer_.async_wait([self, this](const boost::system::error_code& ec) {
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if (ec)
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{
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LOG(ERROR) << "Error during async wait: " << ec.message() << "\n";
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}
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else
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{
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do_read();
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}
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});
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return;
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}
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else
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{
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pcmListener_->onResync(this, currentTick - nextTick_);
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nextTick_ = currentTick + buffer_ms_;
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first_ = true;
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do_read();
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}
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lastException_ = "";
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}
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catch (const std::exception& e)
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{
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if (lastException_ != e.what())
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{
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LOG(ERROR) << "(PipeStream) Exception: " << e.what() << std::endl;
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lastException_ = e.what();
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}
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connect();
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}
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}
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