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 #include <vector> 16 17 #include "api/array_view.h" 18 #include "modules/audio_processing/aec3/aec3_common.h" 19 #include "rtc_base/constructormagic.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 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 // MODULES_AUDIO_PROCESSING_AEC3_FRAME_BLOCKER_H_ 49