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/*
* Copyright (c) 2011 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.
*/
#ifndef MODULES_AUDIO_MIXER_AUDIO_FRAME_MANIPULATOR_H_
#define MODULES_AUDIO_MIXER_AUDIO_FRAME_MANIPULATOR_H_
#include <stddef.h>
#include <stdint.h>
#include "api/audio/audio_frame.h"
namespace webrtc {
// Updates the audioFrame's energy (based on its samples).
uint32_t AudioMixerCalculateEnergy(const AudioFrame& audio_frame);
// Ramps up or down the provided audio frame. Ramp(0, 1, frame) will
// linearly increase the samples in the frame from 0 to full volume.
void Ramp(float start_gain, float target_gain, AudioFrame* audio_frame);
// Downmixes or upmixes a frame between stereo and mono.
void RemixFrame(size_t target_number_of_channels, AudioFrame* frame);
} // namespace webrtc
#endif // MODULES_AUDIO_MIXER_AUDIO_FRAME_MANIPULATOR_H_