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/*
* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef MODULES_AUDIO_MIXER_SINE_WAVE_GENERATOR_H_
#define MODULES_AUDIO_MIXER_SINE_WAVE_GENERATOR_H_
#include <stdint.h>
#include "api/audio/audio_frame.h"
#include "rtc_base/checks.h"
namespace webrtc {
class SineWaveGenerator {
public:
SineWaveGenerator(float wave_frequency_hz, int16_t amplitude)
: wave_frequency_hz_(wave_frequency_hz), amplitude_(amplitude) {
RTC_DCHECK_GT(wave_frequency_hz, 0);
}
// Produces appropriate output based on frame->num_channels_,
// frame->sample_rate_hz_.
void GenerateNextFrame(AudioFrame* frame);
private:
float phase_ = 0.f;
const float wave_frequency_hz_;
const int16_t amplitude_;
};
} // namespace webrtc
#endif // MODULES_AUDIO_MIXER_SINE_WAVE_GENERATOR_H_
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