Line data    Source code

       1             : /*
       2             :  *  Copyright (c) 2016 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_PROCESSING_AEC3_FRAME_BLOCKER_H_
      12             : #define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_FRAME_BLOCKER_H_
      13             : 
      14             : #include <stddef.h>
      15             : #include <vector>
      16             : 
      17             : #include "webrtc/base/array_view.h"
      18             : #include "webrtc/base/constructormagic.h"
      19             : #include "webrtc/modules/audio_processing/aec3/aec3_constants.h"
      20             : 
      21             : namespace webrtc {
      22             : 
      23             : // Class for producing 64 sample multiband blocks from frames consisting of 1 or
      24             : // 2 subframes of 80 samples.
      25           0 : class FrameBlocker {
      26             :  public:
      27             :   explicit FrameBlocker(size_t num_bands);
      28             :   ~FrameBlocker();
      29             :   // Inserts one 80 sample multiband subframe from the multiband frame and
      30             :   // extracts one 64 sample multiband block.
      31             :   void InsertSubFrameAndExtractBlock(
      32             :       const std::vector<rtc::ArrayView<float>>& sub_frame,
      33             :       std::vector<std::vector<float>>* block);
      34             :   // Reports whether a multiband block of 64 samples is available for
      35             :   // extraction.
      36             :   bool IsBlockAvailable() const;
      37             :   // Extracts a multiband block of 64 samples.
      38             :   void ExtractBlock(std::vector<std::vector<float>>* block);
      39             : 
      40             :  private:
      41             :   const size_t num_bands_;
      42             :   std::vector<std::vector<float>> buffer_;
      43             : 
      44             :   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(FrameBlocker);
      45             : };
      46             : }  // namespace webrtc
      47             : 
      48             : #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_FRAME_BLOCKER_H_