AMRWB Class Reference

AMR Wideband codec implementation. More...

#include <AMRWB.h>

Inheritance diagram for AMRWB:

Collaboration diagram for AMRWB:

Public Types
enum class	Mode {   WB_6_60 = 0 , WB_8_85 , WB_12_65 , WB_14_25 ,   WB_15_85 , WB_18_25 , WB_19_85 , WB_23_05 ,   WB_23_85 }
	Available encoding modes for AMR-WB.

Public Member Functions
	~AMRWB () override
	Destructor.
void	setMode (Mode mode)
	Set encoding mode. More...
Mode	getMode () const
	Get current encoding mode. More...
int	encode (const int16_t *pcmSamples, size_t sampleCount, uint8_t *amrData, size_t amrBufferSize) override
	Encode PCM samples to AMR-WB format. More...
int	decode (const uint8_t *amrData, size_t amrSize, int16_t *pcmSamples, size_t maxSampleCount) override
	Decode AMR-WB data to PCM samples. More...
int	getSampleRate () const override
	Get sample rate (16000 Hz for AMR-WB) More...
int	getFrameSizeSamples () override
	Get frame size in samples (320 for AMR-WB) More...
int	getEncodedFrameSizeBytes () override
	Get the size in bytes for one encoded frame in current mode. More...

Additional Inherited Members
Protected Attributes inherited from AMRCodec
bool	isInitialized = false

Detailed Description

AMR Wideband codec implementation.

Member Function Documentation

decode()

int AMRWB::decode ( const uint8_t *  amrData, size_t  amrSize, int16_t *  pcmSamples, size_t  maxSampleCount  )

inlineoverridevirtual

Decode AMR-WB data to PCM samples.

Parameters

amrData	AMR encoded data
amrSize	Size of AMR data in bytes
pcmSamples	Output buffer for PCM samples
maxSampleCount	Maximum capacity of output buffer

Returns

Number of decoded samples written

Implements AMRCodec.

encode()

int AMRWB::encode ( const int16_t *  pcmSamples, size_t  sampleCount, uint8_t *  amrData, size_t  amrBufferSize  )

inlineoverridevirtual

Encode PCM samples to AMR-WB format.

Parameters

pcmSamples	Input PCM samples (320 samples = 20ms at 16kHz)
sampleCount	Number of input samples
amrData	Buffer to store encoded AMR data
amrBufferSize	Size of the AMR buffer in bytes

Returns

Number of bytes written to amrData

Implements AMRCodec.

getEncodedFrameSizeBytes()

int AMRWB::getEncodedFrameSizeBytes ( )

inlineoverridevirtual

Get the size in bytes for one encoded frame in current mode.

Returns

Bytes per frame

Implements AMRCodec.

getFrameSizeSamples()

int AMRWB::getFrameSizeSamples ( )

inlineoverridevirtual

Get frame size in samples (320 for AMR-WB)

Returns

Frame size in samples

Implements AMRCodec.

getMode()

Mode AMRWB::getMode ( ) const

inline

Get current encoding mode.

Returns

Current mode

getSampleRate()

int AMRWB::getSampleRate ( ) const

inlineoverridevirtual

Get sample rate (16000 Hz for AMR-WB)

Returns

Sample rate in Hz

Implements AMRCodec.

setMode()

void AMRWB::setMode ( Mode  mode )

inline

Set encoding mode.

Parameters

mode	Desired encoding mode

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

• src/AMRWB.h