116 lines
3.7 KiB
C++
116 lines
3.7 KiB
C++
/******************************************************************************\
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* Copyright (c) 2020
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*
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* Author(s):
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* pljones
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*
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******************************************************************************
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*
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\******************************************************************************/
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#pragma once
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#include <QDataStream>
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namespace recorder {
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inline QString secondsAt48K( const qint64 frames,
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const int frameSize )
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{
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return QString::number( static_cast<double>( frames * frameSize ) / 48000, 'f', 14 );
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}
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struct STrackItem
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{
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STrackItem ( int numAudioChannels,
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qint64 startFrame,
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qint64 frameCount,
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QString fileName ) :
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numAudioChannels ( numAudioChannels ),
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startFrame ( startFrame ),
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frameCount ( frameCount ),
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fileName ( fileName )
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{
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}
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int numAudioChannels;
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qint64 startFrame;
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qint64 frameCount;
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QString fileName;
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};
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class HdrRiff
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{
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public:
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HdrRiff() {}
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static const uint32_t chunkId = 0x46464952; // RIFF
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static const uint32_t chunkSize = 0xffffffff; // (will be overwritten) Size of file in bytes - 8 = size of data + 36
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static const uint32_t format = 0x45564157; // WAVE
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};
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class FmtSubChunk
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{
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public:
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FmtSubChunk(const uint16_t _numChannels) :
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numChannels (_numChannels)
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, byteRate (sampleRate * numChannels * bitsPerSample/8)
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, blockAlign (numChannels * bitsPerSample/8)
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{
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}
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static const uint32_t chunkId = 0x20746d66; // "fmt "
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static const uint32_t chunkSize = 16; // bytes in fmtSubChunk after chunkSize
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static const uint16_t audioFormat = 1; // PCM
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const uint16_t numChannels; // 1 for mono, 2 for joy... uh, stereo
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static const uint32_t sampleRate = 48000; // because it's Jamulus
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const uint32_t byteRate; // sampleRate * numChannels * bitsPerSample/8
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const uint16_t blockAlign; // numChannels * bitsPerSample/8
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static const uint16_t bitsPerSample = 16;
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};
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class DataSubChunkHdr
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{
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public:
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DataSubChunkHdr() {}
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static const uint32_t chunkId = 0x61746164; // "data"
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static const uint32_t chunkSize = 0xffffffff; // (will be overwritten) Size of data
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};
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class CWaveStream : public QDataStream
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{
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public:
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CWaveStream(const uint16_t numChannels);
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explicit CWaveStream(QIODevice *iod, const uint16_t numChannels);
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CWaveStream(QByteArray *iod, QIODevice::OpenMode flags, const uint16_t numChannels);
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CWaveStream(const QByteArray &ba, const uint16_t numChannels);
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void finalise();
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private:
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void waveStreamHeaders();
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const uint16_t numChannels;
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const int64_t initialPos;
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const ByteOrder initialByteOrder;
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};
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}
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recorder::CWaveStream& operator<<(recorder::CWaveStream& out, recorder::HdrRiff& hdrRiff);
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recorder::CWaveStream& operator<<(recorder::CWaveStream& out, recorder::FmtSubChunk& fmtSubChunk);
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recorder::CWaveStream& operator<<(recorder::CWaveStream& out, recorder::DataSubChunkHdr& dataSubChunkHdr);
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