chromium/third_party/webrtc/modules/audio_processing/splitting_filter.h

/*
 *  Copyright (c) 2014 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_PROCESSING_SPLITTING_FILTER_H_
#define MODULES_AUDIO_PROCESSING_SPLITTING_FILTER_H_

#include <cstring>
#include <memory>
#include <vector>

#include "common_audio/channel_buffer.h"
#include "modules/audio_processing/three_band_filter_bank.h"

namespace webrtc {

struct TwoBandsStates { … };

// Splitting filter which is able to split into and merge from 2 or 3 frequency
// bands. The number of channels needs to be provided at construction time.
//
// For each block, Analysis() is called to split into bands and then Synthesis()
// to merge these bands again. The input and output signals are contained in
// ChannelBuffers and for the different bands an array of ChannelBuffers is
// used.
class SplittingFilter { … };

}  // namespace webrtc

#endif  // MODULES_AUDIO_PROCESSING_SPLITTING_FILTER_H_