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      1 /*
      2  *  Copyright (c) 2011 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 #ifndef WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_SOURCE_AUDIO_FRAME_MANIPULATOR_H_
     12 #define WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_SOURCE_AUDIO_FRAME_MANIPULATOR_H_
     13 
     14 namespace webrtc {
     15 class AudioFrame;
     16 
     17 // Updates the audioFrame's energy (based on its samples).
     18 void CalculateEnergy(AudioFrame& audioFrame);
     19 
     20 // Apply linear step function that ramps in/out the audio samples in audioFrame
     21 void RampIn(AudioFrame& audioFrame);
     22 void RampOut(AudioFrame& audioFrame);
     23 
     24 }  // namespace webrtc
     25 
     26 #endif // WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_SOURCE_AUDIO_FRAME_MANIPULATOR_H_
     27