14b43beb7c
TBR=niklas.enbom@webrtc.org Review URL: https://webrtc-codereview.appspot.com/915006 git-svn-id: http://webrtc.googlecode.com/svn/trunk@2963 4adac7df-926f-26a2-2b94-8c16560cd09d
59 lines
2.2 KiB
C++
59 lines
2.2 KiB
C++
/*
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* Copyright (c) 2012 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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#ifndef WEBRTC_VOICE_ENGINE_AUDIO_FRAME_OPERATIONS_H_
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#define WEBRTC_VOICE_ENGINE_AUDIO_FRAME_OPERATIONS_H_
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#include "typedefs.h"
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namespace webrtc {
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class AudioFrame;
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// TODO(andrew): consolidate this with utility.h and audio_frame_manipulator.h.
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// Change reference parameters to pointers. Consider using a namespace rather
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// than a class.
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class AudioFrameOperations {
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public:
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// Upmixes mono |src_audio| to stereo |dst_audio|. This is an out-of-place
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// operation, meaning src_audio and dst_audio must point to different
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// buffers. It is the caller's responsibility to ensure that |dst_audio| is
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// sufficiently large.
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static void MonoToStereo(const int16_t* src_audio, int samples_per_channel,
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int16_t* dst_audio);
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// |frame.num_channels_| will be updated. This version checks for sufficient
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// buffer size and that |num_channels_| is mono.
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static int MonoToStereo(AudioFrame* frame);
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// Downmixes stereo |src_audio| to mono |dst_audio|. This is an in-place
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// operation, meaning |src_audio| and |dst_audio| may point to the same
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// buffer.
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static void StereoToMono(const int16_t* src_audio, int samples_per_channel,
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int16_t* dst_audio);
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// |frame.num_channels_| will be updated. This version checks that
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// |num_channels_| is stereo.
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static int StereoToMono(AudioFrame* frame);
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// Swap the left and right channels of |frame|. Fails silently if |frame| is
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// not stereo.
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static void SwapStereoChannels(AudioFrame* frame);
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// Zeros out the audio and sets |frame.energy| to zero.
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static void Mute(AudioFrame& frame);
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static int Scale(float left, float right, AudioFrame& frame);
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static int ScaleWithSat(float scale, AudioFrame& frame);
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};
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} // namespace webrtc
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#endif // #ifndef WEBRTC_VOICE_ENGINE_AUDIO_FRAME_OPERATIONS_H_
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