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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> | |
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" | |
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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