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48 lines
1.7 KiB
C
48 lines
1.7 KiB
C
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/*
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* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_AUDIO_PROCESSING_AEC3_BLOCK_FRAMER_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_BLOCK_FRAMER_H_
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#include <vector>
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#include "api/array_view.h"
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#include "modules/audio_processing/aec3/aec3_common.h"
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#include "rtc_base/constructormagic.h"
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namespace webrtc {
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// Class for producing frames consisting of 1 or 2 subframes of 80 samples each
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// from 64 sample blocks. The class is designed to work together with the
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// FrameBlocker class which performs the reverse conversion. Used together with
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// that, this class produces output frames are the same rate as frames are
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// received by the FrameBlocker class. Note that the internal buffers will
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// overrun if any other rate of packets insertion is used.
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class BlockFramer {
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public:
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explicit BlockFramer(size_t num_bands);
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~BlockFramer();
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// Adds a 64 sample block into the data that will form the next output frame.
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void InsertBlock(const std::vector<std::vector<float>>& block);
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// Adds a 64 sample block and extracts an 80 sample subframe.
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void InsertBlockAndExtractSubFrame(
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const std::vector<std::vector<float>>& block,
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std::vector<rtc::ArrayView<float>>* sub_frame);
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private:
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const size_t num_bands_;
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std::vector<std::vector<float>> buffer_;
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RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(BlockFramer);
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_BLOCK_FRAMER_H_
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