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_BLOCK_FRAMER_H_ 12 #define MODULES_AUDIO_PROCESSING_AEC3_BLOCK_FRAMER_H_ 13 14 #include <vector> 15 16 #include "api/array_view.h" 17 #include "modules/audio_processing/aec3/aec3_common.h" 18 19 namespace webrtc { 20 21 // Class for producing frames consisting of 2 subframes of 80 samples each 22 // from 64 sample blocks. The class is designed to work together with the 23 // FrameBlocker class which performs the reverse conversion. Used together with 24 // that, this class produces output frames are the same rate as frames are 25 // received by the FrameBlocker class. Note that the internal buffers will 26 // overrun if any other rate of packets insertion is used. 27 class BlockFramer { 28 public: 29 BlockFramer(size_t num_bands, size_t num_channels); 30 ~BlockFramer(); 31 BlockFramer(const BlockFramer&) = delete; 32 BlockFramer& operator=(const BlockFramer&) = delete; 33 34 // Adds a 64 sample block into the data that will form the next output frame. 35 void InsertBlock(const std::vector<std::vector<std::vector<float>>>& block); 36 // Adds a 64 sample block and extracts an 80 sample subframe. 37 void InsertBlockAndExtractSubFrame( 38 const std::vector<std::vector<std::vector<float>>>& block, 39 std::vector<std::vector<rtc::ArrayView<float>>>* sub_frame); 40 41 private: 42 const size_t num_bands_; 43 const size_t num_channels_; 44 std::vector<std::vector<std::vector<float>>> buffer_; 45 }; 46 } // namespace webrtc 47 48 #endif // MODULES_AUDIO_PROCESSING_AEC3_BLOCK_FRAMER_H_ 49