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| 1 /* | |
| 2 * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #include <cmath> | |
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hlundin-webrtc
2017/03/29 07:22:56
math.h
aleloi
2017/03/29 10:56:11
Done.
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| 12 | |
| 13 #include "webrtc/base/safe_conversions.h" | |
| 14 #include "webrtc/modules/audio_mixer/sine_wave_generator.h" | |
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hlundin-webrtc
2017/03/29 07:22:56
This one goes first of all.
aleloi
2017/03/29 10:56:11
Done.
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| 15 | |
| 16 namespace webrtc { | |
| 17 | |
| 18 namespace { | |
| 19 constexpr float kPi = 3.14159265f; | |
| 20 } // namespace | |
| 21 | |
| 22 void SineWaveGenerator::GenerateNextFrame(AudioFrame* frame) { | |
| 23 RTC_DCHECK(frame); | |
| 24 for (size_t i = 0; i < frame->samples_per_channel_; ++i) { | |
| 25 for (size_t ch = 0; ch < frame->num_channels_; ++ch) { | |
| 26 frame->data_[frame->num_channels_ * i + ch] = | |
| 27 rtc::saturated_cast<int16_t>(amplitude_ * sinf(phase_)); | |
| 28 } | |
| 29 phase_ += wave_frequency_hz_ * 2 * kPi / frame->sample_rate_hz_; | |
| 30 } | |
| 31 } | |
| 32 } // namespace webrtc | |
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