c20978e581
NOPRESUBMIT=True # cpplint errors that aren't caused by this CL. NOTRY=True NOTREECHECKS=True TBR=kwiberg@webrtc.org, kjellander@webrtc.org Bug: webrtc:7634 Change-Id: I3cca0fbaa807b563c95979cccd6d1bec32055f36 Reviewed-on: https://chromium-review.googlesource.com/562156 Commit-Queue: Edward Lemur <ehmaldonado@webrtc.org> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#18919}
35 lines
1.1 KiB
C++
35 lines
1.1 KiB
C++
/*
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* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/modules/audio_mixer/sine_wave_generator.h"
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#include <math.h>
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#include "webrtc/rtc_base/safe_conversions.h"
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namespace webrtc {
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namespace {
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constexpr float kPi = 3.14159265f;
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} // namespace
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void SineWaveGenerator::GenerateNextFrame(AudioFrame* frame) {
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RTC_DCHECK(frame);
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int16_t* frame_data = frame->mutable_data();
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for (size_t i = 0; i < frame->samples_per_channel_; ++i) {
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for (size_t ch = 0; ch < frame->num_channels_; ++ch) {
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frame_data[frame->num_channels_ * i + ch] =
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rtc::saturated_cast<int16_t>(amplitude_ * sinf(phase_));
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}
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phase_ += wave_frequency_hz_ * 2 * kPi / frame->sample_rate_hz_;
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}
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}
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} // namespace webrtc
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