mirror of
https://github.com/badaix/snapcast.git
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112 lines
2.7 KiB
C++
112 lines
2.7 KiB
C++
/***
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This file is part of snapcast
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Copyright (C) 2014-2017 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 <memory>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "fileStream.h"
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#include "encoder/encoderFactory.h"
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#include "common/log.h"
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#include "common/snapException.h"
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using namespace std;
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FileStream::FileStream(PcmListener* pcmListener, const StreamUri& uri) : PcmStream(pcmListener, uri)
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{
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ifs.open(uri_.path.c_str(), std::ifstream::in|std::ifstream::binary);
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if (!ifs.good())
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{
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LOG(ERROR) << "failed to open PCM file: \"" + uri_.path + "\"\n";
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throw SnapException("failed to open PCM file: \"" + uri_.path + "\"");
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}
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}
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FileStream::~FileStream()
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{
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ifs.close();
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}
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void FileStream::worker()
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{
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timeval tvChunk;
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std::unique_ptr<msg::PcmChunk> chunk(new msg::PcmChunk(sampleFormat_, pcmReadMs_));
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ifs.seekg (0, ifs.end);
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size_t length = ifs.tellg();
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ifs.seekg (0, ifs.beg);
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setState(kPlaying);
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while (active_)
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{
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chronos::systemtimeofday(&tvChunk);
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tvEncodedChunk_ = tvChunk;
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long nextTick = chronos::getTickCount();
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try
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{
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while (active_)
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{
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chunk->timestamp.sec = tvChunk.tv_sec;
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chunk->timestamp.usec = tvChunk.tv_usec;
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size_t toRead = chunk->payloadSize;
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size_t count = 0;
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size_t pos = ifs.tellg();
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size_t left = length - pos;
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if (left < toRead)
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{
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ifs.read(chunk->payload, left);
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ifs.seekg (0, ifs.beg);
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count = left;
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}
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ifs.read(chunk->payload + count, toRead - count);
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encoder_->encode(chunk.get());
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if (!active_) break;
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nextTick += pcmReadMs_;
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chronos::addUs(tvChunk, pcmReadMs_ * 1000);
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long currentTick = chronos::getTickCount();
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if (nextTick >= currentTick)
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{
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// LOG(INFO) << "sleep: " << nextTick - currentTick << "\n";
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if (!sleep(nextTick - currentTick))
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break;
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}
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else
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{
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chronos::systemtimeofday(&tvChunk);
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tvEncodedChunk_ = tvChunk;
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pcmListener_->onResync(this, currentTick - nextTick);
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nextTick = currentTick;
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}
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}
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}
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catch(const std::exception& e)
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{
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LOG(ERROR) << "(FileStream) Exception: " << e.what() << std::endl;
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}
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}
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}
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