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 MODULES_AUDIO_PROCESSING_AEC3_FRAME_BLOCKER_H_
12 #define MODULES_AUDIO_PROCESSING_AEC3_FRAME_BLOCKER_H_
13 
14 #include <stddef.h>
15 
16 #include <vector>
17 
18 #include "api/array_view.h"
19 #include "modules/audio_processing/aec3/aec3_common.h"
20 
21 namespace webrtc {
22 
23 // Class for producing 64 sample multiband blocks from frames consisting of 2
24 // subframes of 80 samples.
25 class FrameBlocker {
26  public:
27   FrameBlocker(size_t num_bands, size_t num_channels);
28   ~FrameBlocker();
29   FrameBlocker(const FrameBlocker&) = delete;
30   FrameBlocker& operator=(const FrameBlocker&) = delete;
31 
32   // Inserts one 80 sample multiband subframe from the multiband frame and
33   // extracts one 64 sample multiband block.
34   void InsertSubFrameAndExtractBlock(
35       const std::vector<std::vector<rtc::ArrayView<float>>>& sub_frame,
36       std::vector<std::vector<std::vector<float>>>* block);
37   // Reports whether a multiband block of 64 samples is available for
38   // extraction.
39   bool IsBlockAvailable() const;
40   // Extracts a multiband block of 64 samples.
41   void ExtractBlock(std::vector<std::vector<std::vector<float>>>* block);
42 
43  private:
44   const size_t num_bands_;
45   const size_t num_channels_;
46   std::vector<std::vector<std::vector<float>>> buffer_;
47 };
48 }  // namespace webrtc
49 
50 #endif  // MODULES_AUDIO_PROCESSING_AEC3_FRAME_BLOCKER_H_
51