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1 /* | 1 /* |
2 * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 #include "webrtc/modules/audio_mixer/sine_wave_generator.h" | 11 #include "webrtc/modules/audio_mixer/sine_wave_generator.h" |
12 | 12 |
13 #include <math.h> | 13 #include <math.h> |
14 | 14 |
15 #include "webrtc/base/safe_conversions.h" | 15 #include "webrtc/base/safe_conversions.h" |
16 | 16 |
17 namespace webrtc { | 17 namespace webrtc { |
18 | 18 |
19 namespace { | 19 namespace { |
20 constexpr float kPi = 3.14159265f; | 20 constexpr float kPi = 3.14159265f; |
21 } // namespace | 21 } // namespace |
22 | 22 |
23 void SineWaveGenerator::GenerateNextFrame(AudioFrame* frame) { | 23 void SineWaveGenerator::GenerateNextFrame(AudioFrame* frame) { |
24 RTC_DCHECK(frame); | 24 RTC_DCHECK(frame); |
| 25 int16_t* frame_data = frame->mutable_data(); |
25 for (size_t i = 0; i < frame->samples_per_channel_; ++i) { | 26 for (size_t i = 0; i < frame->samples_per_channel_; ++i) { |
26 for (size_t ch = 0; ch < frame->num_channels_; ++ch) { | 27 for (size_t ch = 0; ch < frame->num_channels_; ++ch) { |
27 frame->data_[frame->num_channels_ * i + ch] = | 28 frame_data[frame->num_channels_ * i + ch] = |
28 rtc::saturated_cast<int16_t>(amplitude_ * sinf(phase_)); | 29 rtc::saturated_cast<int16_t>(amplitude_ * sinf(phase_)); |
29 } | 30 } |
30 phase_ += wave_frequency_hz_ * 2 * kPi / frame->sample_rate_hz_; | 31 phase_ += wave_frequency_hz_ * 2 * kPi / frame->sample_rate_hz_; |
31 } | 32 } |
32 } | 33 } |
33 } // namespace webrtc | 34 } // namespace webrtc |
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