frame_blocker.h (1634B)
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/block.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<ArrayView<float>>>& sub_frame, 36 Block* 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(Block* 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_