Move functionality out from AudioFrame and into AudioFrameOperations.

webrtc/modules/utility/include/audio_frame_operations.h

 /*
  *  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.
  */
 
 #ifndef WEBRTC_MODULES_UTILITY_INCLUDE_AUDIO_FRAME_OPERATIONS_H_
 #define WEBRTC_MODULES_UTILITY_INCLUDE_AUDIO_FRAME_OPERATIONS_H_
+// The contents of this file have moved to
+// //webrtc/audio/utility. This file is deprecated.
 
-#include "webrtc/typedefs.h"
-
-namespace webrtc {
-
-class AudioFrame;
-
-// TODO(andrew): consolidate this with utility.h and audio_frame_manipulator.h.
-// Change reference parameters to pointers. Consider using a namespace rather
-// than a class.
-class AudioFrameOperations {
- public:
-  // Upmixes mono |src_audio| to stereo |dst_audio|. This is an out-of-place
-  // operation, meaning src_audio and dst_audio must point to different
-  // buffers. It is the caller's responsibility to ensure that |dst_audio| is
-  // sufficiently large.
-  static void MonoToStereo(const int16_t* src_audio, size_t samples_per_channel,
-                           int16_t* dst_audio);
-  // |frame.num_channels_| will be updated. This version checks for sufficient
-  // buffer size and that |num_channels_| is mono.
-  static int MonoToStereo(AudioFrame* frame);
-
-  // Downmixes stereo |src_audio| to mono |dst_audio|. This is an in-place
-  // operation, meaning |src_audio| and |dst_audio| may point to the same
-  // buffer.
-  static void StereoToMono(const int16_t* src_audio, size_t samples_per_channel,
-                           int16_t* dst_audio);
-  // |frame.num_channels_| will be updated. This version checks that
-  // |num_channels_| is stereo.
-  static int StereoToMono(AudioFrame* frame);
-
-  // Swap the left and right channels of |frame|. Fails silently if |frame| is
-  // not stereo.
-  static void SwapStereoChannels(AudioFrame* frame);
-
-  // Conditionally zero out contents of |frame| for implementing audio mute:
-  //  |previous_frame_muted| &&  |current_frame_muted| - Zero out whole frame.
-  //  |previous_frame_muted| && !|current_frame_muted| - Fade-in at frame start.
-  // !|previous_frame_muted| &&  |current_frame_muted| - Fade-out at frame end.
-  // !|previous_frame_muted| && !|current_frame_muted| - Leave frame untouched.
-  static void Mute(AudioFrame* frame, bool previous_frame_muted,
-                   bool current_frame_muted);
-
-  static int Scale(float left, float right, AudioFrame& frame);
-
-  static int ScaleWithSat(float scale, AudioFrame& frame);
-};
-
-}  // namespace webrtc
+// TODO(aleloi): Remove this file when clients have updated their
+// includes. See bugs.webrtc.org/6548.
+#include "webrtc/audio/utility/audio_frame_operations.h"
 
 #endif  // #ifndef WEBRTC_MODULES_UTILITY_INCLUDE_AUDIO_FRAME_OPERATIONS_H_