chromium/third_party/webrtc/audio/utility/audio_frame_operations.cc

/*
 *  Copyright (c) 2012 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.
 */

#include "audio/utility/audio_frame_operations.h"

#include <string.h>

#include <algorithm>
#include <cstdint>
#include <utility>

#include "common_audio/include/audio_util.h"
#include "rtc_base/checks.h"
#include "rtc_base/numerics/safe_conversions.h"

namespace webrtc {
namespace {

// 2.7ms @ 48kHz, 4ms @ 32kHz, 8ms @ 16kHz.
const size_t kMuteFadeFrames = …;
const float kMuteFadeInc = …;

}  // namespace

void AudioFrameOperations::QuadToStereo(
    InterleavedView<const int16_t> src_audio,
    InterleavedView<int16_t> dst_audio) { … }

int AudioFrameOperations::QuadToStereo(AudioFrame* frame) { … }

void AudioFrameOperations::DownmixChannels(
    InterleavedView<const int16_t> src_audio,
    InterleavedView<int16_t> dst_audio) { … }

void AudioFrameOperations::DownmixChannels(size_t dst_channels,
                                           AudioFrame* frame) { … }

void AudioFrameOperations::UpmixChannels(size_t target_number_of_channels,
                                         AudioFrame* frame) { … }

void AudioFrameOperations::SwapStereoChannels(AudioFrame* frame) { … }

void AudioFrameOperations::Mute(AudioFrame* frame,
                                bool previous_frame_muted,
                                bool current_frame_muted) { … }

void AudioFrameOperations::Mute(AudioFrame* frame) { … }

int AudioFrameOperations::ScaleWithSat(float scale, AudioFrame* frame) { … }
}  // namespace webrtc