block_framer.h (1816B)
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 <cstddef> 15 #include <vector> 16 17 #include "api/array_view.h" 18 #include "modules/audio_processing/aec3/block.h" 19 20 namespace webrtc { 21 22 // Class for producing frames consisting of 2 subframes of 80 samples each 23 // from 64 sample blocks. The class is designed to work together with the 24 // FrameBlocker class which performs the reverse conversion. Used together with 25 // that, this class produces output frames are the same rate as frames are 26 // received by the FrameBlocker class. Note that the internal buffers will 27 // overrun if any other rate of packets insertion is used. 28 class BlockFramer { 29 public: 30 BlockFramer(size_t num_bands, size_t num_channels); 31 ~BlockFramer(); 32 BlockFramer(const BlockFramer&) = delete; 33 BlockFramer& operator=(const BlockFramer&) = delete; 34 35 // Adds a 64 sample block into the data that will form the next output frame. 36 void InsertBlock(const Block& block); 37 // Adds a 64 sample block and extracts an 80 sample subframe. 38 void InsertBlockAndExtractSubFrame( 39 const Block& block, 40 std::vector<std::vector<ArrayView<float>>>* sub_frame); 41 42 private: 43 const size_t num_bands_; 44 const size_t num_channels_; 45 std::vector<std::vector<std::vector<float>>> buffer_; 46 }; 47 } // namespace webrtc 48 49 #endif // MODULES_AUDIO_PROCESSING_AEC3_BLOCK_FRAMER_H_