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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#ifndef DOM_MEDIA_GTEST_AUDIO_GENERATOR_H_
#define DOM_MEDIA_GTEST_AUDIO_GENERATOR_H_
#include "AudioSegment.h"
#include "prtime.h"
#include "SineWaveGenerator.h"
namespace mozilla {
template <typename Sample>
class AudioGenerator {
public:
AudioGenerator(uint32_t aChannels, uint32_t aSampleRate,
uint32_t aFrequency = 1000)
: mSampleRate(aSampleRate),
mFrequency(aFrequency),
mChannelCount(aChannels),
mGenerator(aSampleRate, aFrequency) {}
void Generate(mozilla::AudioSegment& aSegment, uint32_t aFrameCount) {
CheckedInt<size_t> bufferSize(sizeof(Sample));
bufferSize *= aFrameCount;
RefPtr<SharedBuffer> buffer = SharedBuffer::Create(bufferSize);
Sample* dest = static_cast<Sample*>(buffer->Data());
mGenerator.generate(dest, aFrameCount);
AutoTArray<const Sample*, 1> channels;
for (uint32_t i = 0; i < mChannelCount; ++i) {
channels.AppendElement(dest);
}
aSegment.AppendFrames(buffer.forget(), channels, aFrameCount,
PRINCIPAL_HANDLE_NONE);
}
void GenerateInterleaved(Sample* aSamples, uint32_t aFrameCount) {
mGenerator.generate(aSamples, aFrameCount, mChannelCount);
}
void SetChannelsCount(uint32_t aChannelCount) {
mChannelCount = aChannelCount;
}
uint32_t ChannelCount() const { return mChannelCount; }
static float Amplitude() {
return mozilla::SineWaveGenerator<Sample>::Amplitude();
}
const uint32_t mSampleRate;
const uint32_t mFrequency;
private:
uint32_t mChannelCount;
mozilla::SineWaveGenerator<Sample> mGenerator;
};
} // namespace mozilla
#endif // DOM_MEDIA_GTEST_AUDIO_GENERATOR_H_