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98 lines
2.3 KiB
C++
98 lines
2.3 KiB
C++
/***
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This file is part of snapcast
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Copyright (C) 2015 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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#ifndef PCM_CHUNK_H
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#define PCM_CHUNK_H
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#include <chrono>
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#include "message.h"
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#include "wireChunk.h"
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#include "sampleFormat.h"
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namespace msg
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{
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/**
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* Piece of PCM data with SampleFormat information
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* Has information about "when" recorded (start) and duration
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* frames can be read with "readFrames", which will also change the start time
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*/
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class PcmChunk : public WireChunk
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{
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public:
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PcmChunk(const SampleFormat& sampleFormat, size_t ms);
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PcmChunk(const PcmChunk& pcmChunk);
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PcmChunk();
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virtual ~PcmChunk();
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int readFrames(void* outputBuffer, size_t frameCount);
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int seek(int frames);
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virtual chronos::time_point_hrc start() const
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{
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return chronos::time_point_hrc(
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chronos::sec(timestamp.sec) +
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chronos::usec(timestamp.usec) +
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chronos::usec((chronos::usec::rep)(1000000. * ((double)idx_ / (double)format.rate)))
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);
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}
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inline chronos::time_point_hrc end() const
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{
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return start() + durationLeft<chronos::usec>();
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}
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template<typename T>
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inline T duration() const
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{
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return std::chrono::duration_cast<T>(chronos::nsec((chronos::nsec::rep)(1000000 * getFrameCount() / format.msRate())));
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}
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template<typename T>
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inline T durationLeft() const
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{
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return std::chrono::duration_cast<T>(chronos::nsec((chronos::nsec::rep)(1000000 * (getFrameCount() - idx_) / format.msRate())));
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}
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inline bool isEndOfChunk() const
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{
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return idx_ >= getFrameCount();
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}
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inline size_t getFrameCount() const
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{
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return (payloadSize / format.frameSize);
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}
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inline size_t getSampleCount() const
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{
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return (payloadSize / format.sampleSize);
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}
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SampleFormat format;
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private:
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uint32_t idx_;
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};
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}
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#endif
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