frame_blocker.h - mozsearch

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/*

 *  Copyright (c) 2016 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_AEC3_FRAME_BLOCKER_H_

#define MODULES_AUDIO_PROCESSING_AEC3_FRAME_BLOCKER_H_

#include <stddef.h>

#include <vector>

#include "api/array_view.h"

#include "modules/audio_processing/aec3/aec3_common.h"

#include "modules/audio_processing/aec3/block.h"

namespace webrtc {

// Class for producing 64 sample multiband blocks from frames consisting of 2

// subframes of 80 samples.

class FrameBlocker {

 public:

  FrameBlocker(size_t num_bands, size_t num_channels);

  ~FrameBlocker();

  FrameBlocker(const FrameBlocker&) = delete;

  FrameBlocker& operator=(const FrameBlocker&) = delete;

  // Inserts one 80 sample multiband subframe from the multiband frame and

  // extracts one 64 sample multiband block.

  void InsertSubFrameAndExtractBlock(

      const std::vector<std::vector<rtc::ArrayView<float>>>& sub_frame,

      Block* block);

  // Reports whether a multiband block of 64 samples is available for

  // extraction.

  bool IsBlockAvailable() const;

  // Extracts a multiband block of 64 samples.

  void ExtractBlock(Block* block);

 private:

  const size_t num_bands_;

  const size_t num_channels_;

  std::vector<std::vector<std::vector<float>>> buffer_;

};

}  // namespace webrtc

#endif  // MODULES_AUDIO_PROCESSING_AEC3_FRAME_BLOCKER_H_