webrtc::TimeStretch Class Reference

#include <time_stretch.h>

Inheritance diagram for webrtc::TimeStretch:

Public Types
enum	ReturnCodes {   kSuccess = 0, kSuccessLowEnergy = 1, kNoStretch = 2, kError = -1,   kSuccess = 0, kSuccessLowEnergy = 1, kNoStretch = 2, kError = -1 }
enum	ReturnCodes {   kSuccess = 0, kSuccessLowEnergy = 1, kNoStretch = 2, kError = -1,   kSuccess = 0, kSuccessLowEnergy = 1, kNoStretch = 2, kError = -1 }

Public Member Functions
	TimeStretch (int sample_rate_hz, size_t num_channels, const BackgroundNoise &background_noise)
virtual	~TimeStretch ()
ReturnCodes	Process (const int16_t *input, size_t input_len, bool fast_mode, AudioMultiVector *output, size_t *length_change_samples)
	TimeStretch (int sample_rate_hz, size_t num_channels, const BackgroundNoise &background_noise)
virtual	~TimeStretch ()
ReturnCodes	Process (const int16_t *input, size_t input_len, bool fast_mode, AudioMultiVector *output, size_t *length_change_samples)

Protected Member Functions
virtual void	SetParametersForPassiveSpeech (size_t input_length, int16_t *best_correlation, size_t *peak_index) const =0
virtual 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 =0
virtual void	SetParametersForPassiveSpeech (size_t input_length, int16_t *best_correlation, size_t *peak_index) const =0
virtual 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 =0

Protected Attributes
const int	sample_rate_hz_
const int	fs_mult_
const size_t	num_channels_
const size_t	master_channel_
const BackgroundNoise &	background_noise_
int16_t	max_input_value_
int16_t	downsampled_input_ [kDownsampledLen]
int16_t	auto_correlation_ [kCorrelationLen+1]

Static Protected Attributes
static const size_t	kCorrelationLen = 50
static const size_t	kLogCorrelationLen = 6
static const size_t	kMinLag = 10
static const size_t	kMaxLag = 60
static const size_t	kDownsampledLen = kCorrelationLen + kMaxLag
static const int	kCorrelationThreshold = 14746

Member Enumeration Documentation

ReturnCodes [1/2]

enum webrtc::TimeStretch::ReturnCodes

Enumerator
kSuccess
kSuccessLowEnergy
kNoStretch
kError
kSuccess
kSuccessLowEnergy
kNoStretch
kError

ReturnCodes [2/2]

enum webrtc::TimeStretch::ReturnCodes

Enumerator
kSuccess
kSuccessLowEnergy
kNoStretch
kError
kSuccess
kSuccessLowEnergy
kNoStretch
kError

Constructor & Destructor Documentation

TimeStretch() [1/2]

webrtc::TimeStretch::TimeStretch ( int  sample_rate_hz, size_t  num_channels, const BackgroundNoise &  background_noise  )

inline

~TimeStretch() [1/2]

virtual webrtc::TimeStretch::~TimeStretch ( )

inlinevirtual

TimeStretch() [2/2]

webrtc::TimeStretch::TimeStretch ( int  sample_rate_hz, size_t  num_channels, const BackgroundNoise &  background_noise  )

inline

~TimeStretch() [2/2]

virtual webrtc::TimeStretch::~TimeStretch ( )

inlinevirtual

Member Function Documentation

CheckCriteriaAndStretch() [1/2]

virtual ReturnCodes webrtc::TimeStretch::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

protectedpure virtual

Implemented in webrtc::PreemptiveExpand, webrtc::PreemptiveExpand, webrtc::Accelerate, and webrtc::Accelerate.

CheckCriteriaAndStretch() [2/2]

virtual ReturnCodes webrtc::TimeStretch::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

protectedpure virtual

Implemented in webrtc::PreemptiveExpand, webrtc::PreemptiveExpand, webrtc::Accelerate, and webrtc::Accelerate.

Process() [1/2]

ReturnCodes webrtc::TimeStretch::Process	(	const int16_t *	input,
		size_t	input_len,
		bool	fast_mode,
		AudioMultiVector *	output,
		size_t *	length_change_samples
	)

Process() [2/2]

TimeStretch::ReturnCodes webrtc::TimeStretch::Process	(	const int16_t *	input,
		size_t	input_len,
		bool	fast_mode,
		AudioMultiVector *	output,
		size_t *	length_change_samples
	)

SetParametersForPassiveSpeech() [1/2]

virtual void webrtc::TimeStretch::SetParametersForPassiveSpeech ( size_t  input_length, int16_t *  best_correlation, size_t *  peak_index  ) const

protectedpure virtual

Implemented in webrtc::PreemptiveExpand, webrtc::PreemptiveExpand, webrtc::Accelerate, and webrtc::Accelerate.

SetParametersForPassiveSpeech() [2/2]

virtual void webrtc::TimeStretch::SetParametersForPassiveSpeech ( size_t  input_length, int16_t *  best_correlation, size_t *  peak_index  ) const

protectedpure virtual

Implemented in webrtc::PreemptiveExpand, webrtc::PreemptiveExpand, webrtc::Accelerate, and webrtc::Accelerate.

Member Data Documentation

auto_correlation_

int16_t webrtc::TimeStretch::auto_correlation_

protected

background_noise_

const BackgroundNoise & webrtc::TimeStretch::background_noise_

protected

downsampled_input_

int16_t webrtc::TimeStretch::downsampled_input_

protected

fs_mult_

const int webrtc::TimeStretch::fs_mult_

protected

kCorrelationLen

static const size_t webrtc::TimeStretch::kCorrelationLen = 50

staticprotected

kCorrelationThreshold

static const int webrtc::TimeStretch::kCorrelationThreshold = 14746

staticprotected

kDownsampledLen

static const size_t webrtc::TimeStretch::kDownsampledLen = kCorrelationLen + kMaxLag

staticprotected

kLogCorrelationLen

static const size_t webrtc::TimeStretch::kLogCorrelationLen = 6

staticprotected

kMaxLag

static const size_t webrtc::TimeStretch::kMaxLag = 60

staticprotected

kMinLag

static const size_t webrtc::TimeStretch::kMinLag = 10

staticprotected

master_channel_

const size_t webrtc::TimeStretch::master_channel_

protected

max_input_value_

int16_t webrtc::TimeStretch::max_input_value_

protected

num_channels_

const size_t webrtc::TimeStretch::num_channels_

protected

sample_rate_hz_

const int webrtc::TimeStretch::sample_rate_hz_

protected

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The documentation for this class was generated from the following files:

• DerivedData/WebKit/Build/Products/Debug/usr/local/include/webrtc/modules/audio_coding/neteq/time_stretch.h
• Source/ThirdParty/libwebrtc/Source/webrtc/modules/audio_coding/neteq/time_stretch.cc