mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-14 14:20:45 +01:00
665174fdbb
Running clang-format with chromium's style guide. The goal is n-fold: * providing consistency and readability (that's what code guidelines are for) * preventing noise with presubmit checks and git cl format * building on the previous point: making it easier to automatically fix format issues * you name it Please consider using git-hyper-blame to ignore this commit. Bug: webrtc:9340 Change-Id: I694567c4cdf8cee2860958cfe82bfaf25848bb87 Reviewed-on: https://webrtc-review.googlesource.com/81185 Reviewed-by: Patrik Höglund <phoglund@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23660}
86 lines
3.5 KiB
C++
86 lines
3.5 KiB
C++
/*
|
|
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#ifndef MODULES_AUDIO_CODING_NETEQ_PREEMPTIVE_EXPAND_H_
|
|
#define MODULES_AUDIO_CODING_NETEQ_PREEMPTIVE_EXPAND_H_
|
|
|
|
#include <assert.h>
|
|
|
|
#include "modules/audio_coding/neteq/audio_multi_vector.h"
|
|
#include "modules/audio_coding/neteq/time_stretch.h"
|
|
#include "rtc_base/constructormagic.h"
|
|
#include "typedefs.h" // NOLINT(build/include)
|
|
|
|
namespace webrtc {
|
|
|
|
// Forward declarations.
|
|
class BackgroundNoise;
|
|
|
|
// This class implements the PreemptiveExpand operation. Most of the work is
|
|
// done in the base class TimeStretch, which is shared with the Accelerate
|
|
// operation. In the PreemptiveExpand class, the operations that are specific to
|
|
// PreemptiveExpand are implemented.
|
|
class PreemptiveExpand : public TimeStretch {
|
|
public:
|
|
PreemptiveExpand(int sample_rate_hz,
|
|
size_t num_channels,
|
|
const BackgroundNoise& background_noise,
|
|
size_t overlap_samples)
|
|
: TimeStretch(sample_rate_hz, num_channels, background_noise),
|
|
old_data_length_per_channel_(0),
|
|
overlap_samples_(overlap_samples) {}
|
|
|
|
// This method performs the actual PreemptiveExpand operation. The samples are
|
|
// read from |input|, of length |input_length| elements, and are written to
|
|
// |output|. The number of samples added through time-stretching is
|
|
// is provided in the output |length_change_samples|. The method returns
|
|
// the outcome of the operation as an enumerator value.
|
|
ReturnCodes Process(const int16_t* pw16_decoded,
|
|
size_t len,
|
|
size_t old_data_len,
|
|
AudioMultiVector* output,
|
|
size_t* length_change_samples);
|
|
|
|
protected:
|
|
// Sets the parameters |best_correlation| and |peak_index| to suitable
|
|
// values when the signal contains no active speech.
|
|
void SetParametersForPassiveSpeech(size_t input_length,
|
|
int16_t* best_correlation,
|
|
size_t* peak_index) const override;
|
|
|
|
// Checks the criteria for performing the time-stretching operation and,
|
|
// if possible, performs the time-stretching.
|
|
ReturnCodes CheckCriteriaAndStretch(const int16_t* input,
|
|
size_t input_length,
|
|
size_t peak_index,
|
|
int16_t best_correlation,
|
|
bool active_speech,
|
|
bool /*fast_mode*/,
|
|
AudioMultiVector* output) const override;
|
|
|
|
private:
|
|
size_t old_data_length_per_channel_;
|
|
size_t overlap_samples_;
|
|
|
|
RTC_DISALLOW_COPY_AND_ASSIGN(PreemptiveExpand);
|
|
};
|
|
|
|
struct PreemptiveExpandFactory {
|
|
PreemptiveExpandFactory() {}
|
|
virtual ~PreemptiveExpandFactory() {}
|
|
|
|
virtual PreemptiveExpand* Create(int sample_rate_hz,
|
|
size_t num_channels,
|
|
const BackgroundNoise& background_noise,
|
|
size_t overlap_samples) const;
|
|
};
|
|
|
|
} // namespace webrtc
|
|
#endif // MODULES_AUDIO_CODING_NETEQ_PREEMPTIVE_EXPAND_H_
|