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7120742701
Now that we have moved WebRTC from src/webrtc to src/, common_types.h and typedefs.h are triggering a cpplint error. The cpplint complaint is: Include the directory when naming .h files [build/include] [4] This CL disables the error but we have to remove these two headers from the root directory. NOPRESUBMIT=true Bug: webrtc:5876 Change-Id: I08e1b69aadcc4b28ab83bf25e3819d135d41d333 Reviewed-on: https://webrtc-review.googlesource.com/1577 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@google.com> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19859}
120 lines
3.9 KiB
C++
120 lines
3.9 KiB
C++
/*
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* Copyright (c) 2013 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_TRANSIENT_TRANSIENT_SUPPRESSOR_H_
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#define MODULES_AUDIO_PROCESSING_TRANSIENT_TRANSIENT_SUPPRESSOR_H_
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#include <deque>
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#include <memory>
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#include <set>
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#include "rtc_base/gtest_prod_util.h"
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#include "typedefs.h" // NOLINT(build/include)
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namespace webrtc {
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class TransientDetector;
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// Detects transients in an audio stream and suppress them using a simple
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// restoration algorithm that attenuates unexpected spikes in the spectrum.
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class TransientSuppressor {
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public:
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TransientSuppressor();
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~TransientSuppressor();
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int Initialize(int sample_rate_hz, int detector_rate_hz, int num_channels);
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// Processes a |data| chunk, and returns it with keystrokes suppressed from
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// it. The float format is assumed to be int16 ranged. If there are more than
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// one channel, the chunks are concatenated one after the other in |data|.
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// |data_length| must be equal to |data_length_|.
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// |num_channels| must be equal to |num_channels_|.
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// A sub-band, ideally the higher, can be used as |detection_data|. If it is
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// NULL, |data| is used for the detection too. The |detection_data| is always
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// assumed mono.
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// If a reference signal (e.g. keyboard microphone) is available, it can be
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// passed in as |reference_data|. It is assumed mono and must have the same
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// length as |data|. NULL is accepted if unavailable.
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// This suppressor performs better if voice information is available.
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// |voice_probability| is the probability of voice being present in this chunk
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// of audio. If voice information is not available, |voice_probability| must
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// always be set to 1.
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// |key_pressed| determines if a key was pressed on this audio chunk.
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// Returns 0 on success and -1 otherwise.
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int Suppress(float* data,
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size_t data_length,
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int num_channels,
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const float* detection_data,
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size_t detection_length,
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const float* reference_data,
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size_t reference_length,
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float voice_probability,
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bool key_pressed);
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private:
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FRIEND_TEST_ALL_PREFIXES(TransientSuppressorTest,
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TypingDetectionLogicWorksAsExpectedForMono);
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void Suppress(float* in_ptr, float* spectral_mean, float* out_ptr);
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void UpdateKeypress(bool key_pressed);
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void UpdateRestoration(float voice_probability);
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void UpdateBuffers(float* data);
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void HardRestoration(float* spectral_mean);
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void SoftRestoration(float* spectral_mean);
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std::unique_ptr<TransientDetector> detector_;
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size_t data_length_;
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size_t detection_length_;
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size_t analysis_length_;
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size_t buffer_delay_;
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size_t complex_analysis_length_;
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int num_channels_;
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// Input buffer where the original samples are stored.
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std::unique_ptr<float[]> in_buffer_;
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std::unique_ptr<float[]> detection_buffer_;
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// Output buffer where the restored samples are stored.
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std::unique_ptr<float[]> out_buffer_;
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// Arrays for fft.
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std::unique_ptr<size_t[]> ip_;
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std::unique_ptr<float[]> wfft_;
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std::unique_ptr<float[]> spectral_mean_;
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// Stores the data for the fft.
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std::unique_ptr<float[]> fft_buffer_;
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std::unique_ptr<float[]> magnitudes_;
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const float* window_;
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std::unique_ptr<float[]> mean_factor_;
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float detector_smoothed_;
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int keypress_counter_;
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int chunks_since_keypress_;
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bool detection_enabled_;
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bool suppression_enabled_;
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bool use_hard_restoration_;
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int chunks_since_voice_change_;
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uint32_t seed_;
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bool using_reference_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_TRANSIENT_TRANSIENT_SUPPRESSOR_H_
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