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86 lines
2.2 KiB
C++
86 lines
2.2 KiB
C++
#include "stdafx.h"
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#include "WaveRecorder.h"
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#include "MessageManager.h"
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WaveRecorder::WaveRecorder(string outputFile, uint32_t sampleRate, bool isStereo)
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{
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_stream = ofstream(outputFile, ios::out | ios::binary);
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_outputFile = outputFile;
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_streamSize = 0;
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_sampleRate = sampleRate;
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_isStereo = isStereo;
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WriteHeader();
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MessageManager::DisplayMessage("SoundRecorder", "SoundRecorderStarted", _outputFile);
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}
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WaveRecorder::~WaveRecorder()
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{
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CloseFile();
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}
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void WaveRecorder::WriteHeader()
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{
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_stream << "RIFF";
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uint32_t size = 0;
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_stream.write((char*)&size, sizeof(size));
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_stream << "WAVE";
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_stream << "fmt ";
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uint32_t chunkSize = 16;
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_stream.write((char*)&chunkSize, sizeof(chunkSize));
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uint16_t format = 1; //PCM
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uint16_t channelCount = _isStereo ? 2 : 1;
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uint16_t bytesPerSample = 2;
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uint16_t blockAlign = channelCount * bytesPerSample;
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uint32_t byteRate = _sampleRate * channelCount * bytesPerSample;
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uint16_t bitsPerSample = bytesPerSample * 8;
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_stream.write((char*)&format, sizeof(format));
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_stream.write((char*)&channelCount, sizeof(channelCount));
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_stream.write((char*)&_sampleRate, sizeof(_sampleRate));
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_stream.write((char*)&byteRate, sizeof(byteRate));
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_stream.write((char*)&blockAlign, sizeof(blockAlign));
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_stream.write((char*)&bitsPerSample, sizeof(bitsPerSample));
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_stream << "data";
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_stream.write((char*)&size, sizeof(size));
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}
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bool WaveRecorder::WriteSamples(int16_t * samples, uint32_t sampleCount, uint32_t sampleRate, bool isStereo)
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{
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if(_sampleRate != sampleRate || _isStereo != isStereo) {
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//Format changed, stop recording
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CloseFile();
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return false;
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} else {
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uint32_t sampleBytes = sampleCount * (isStereo ? 4 : 2);
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_stream.write((char*)samples, sampleBytes);
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_streamSize += sampleBytes;
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return true;
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}
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}
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void WaveRecorder::UpdateSizeValues()
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{
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_stream.seekp(4, ios::beg);
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uint32_t fileSize = _streamSize + 36;
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_stream.write((char*)&fileSize, sizeof(fileSize));
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_stream.seekp(40, ios::beg);
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_stream.write((char*)&_streamSize, sizeof(_streamSize));
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}
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void WaveRecorder::CloseFile()
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{
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if(_stream && _stream.is_open()) {
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UpdateSizeValues();
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_stream.close();
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MessageManager::DisplayMessage("SoundRecorder", "SoundRecorderStopped", _outputFile);
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}
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}
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