AudioConvert Class Reference

#include <libmythtv/audio/audioconvert.h>

Collaboration diagram for AudioConvert:

Public Member Functions
	AudioConvert (AudioFormat in, AudioFormat out)
virtual	~AudioConvert ()
int	Process (void *out, const void *in, int bytes, bool noclip=false)
	Process Parameters: out : destination buffer where converted samples will be copied in : source buffer bytes: size in bytes of source buffer. More...
AudioFormat	Out (void)
AudioFormat	In (void)
bool	operator== (const AudioConvert &rhs) const
bool	operator!= (const AudioConvert &rhs) const
void	DeinterleaveSamples (int channels, uint8_t *output, const uint8_t *input, int data_size)
void	InterleaveSamples (int channels, uint8_t *output, const uint8_t *const *input, int data_size)
void	InterleaveSamples (int channels, uint8_t *output, const uint8_t *input, int data_size)

Static Public Member Functions
static int	toFloat (AudioFormat format, void *out, const void *in, int bytes)
	Convert integer samples to floats. More...
static int	fromFloat (AudioFormat format, void *out, const void *in, int bytes)
	Convert float samples to integers. More...
static void	MonoToStereo (void *dst, const void *src, int samples)
	Convert a mono stream to stereo by copying and interleaving samples. More...
static void	DeinterleaveSamples (AudioFormat format, int channels, uint8_t *output, const uint8_t *input, int data_size)
	Deinterleave input samples Deinterleave audio samples and compact them. More...
static void	InterleaveSamples (AudioFormat format, int channels, uint8_t *output, const uint8_t *const *input, int data_size)
	Interleave input samples Planar audio is contained in array of pointers Interleave audio samples (convert from planar format) More...
static void	InterleaveSamples (AudioFormat format, int channels, uint8_t *output, const uint8_t *input, int data_size)
	Interleave input samples Interleave audio samples (convert from planar format) More...

Private Attributes
AudioConvertInternal *	m_ctx {nullptr}
AudioFormat	m_in
AudioFormat	m_out

Detailed Description

Definition at line 32 of file audioconvert.h.

Constructor & Destructor Documentation

AudioConvert()

AudioConvert::AudioConvert ( AudioFormat  in, AudioFormat  out  )

inline

Definition at line 36 of file audioconvert.h.

~AudioConvert()

AudioConvert::~AudioConvert ( )

virtual

Definition at line 645 of file audioconvert.cpp.

Member Function Documentation

DeinterleaveSamples() [1/2]

void AudioConvert::DeinterleaveSamples ( AudioFormat  format, int  channels, uint8_t *  output, const uint8_t *  input, int  data_size  )

static

Deinterleave input samples Deinterleave audio samples and compact them.

Definition at line 765 of file audioconvert.cpp.

DeinterleaveSamples() [2/2]

void AudioConvert::DeinterleaveSamples	(	int	channels,
		uint8_t *	output,
		const uint8_t *	input,
		int	data_size
	)

Definition at line 879 of file audioconvert.cpp.

Referenced by DeinterleaveSamples(), AudioOutputDigitalEncoder::Encode(), and MythAVFormatWriter::WriteAudioFrame().

fromFloat()

int AudioConvert::fromFloat ( AudioFormat  format, void *  out, const void *  in, int  bytes  )

static

Convert float samples to integers.

Consumes 'bytes' bytes from in and returns the numer of bytes written to out

Definition at line 555 of file audioconvert.cpp.

Referenced by AudioOutputDigitalEncoder::Encode(), AudioOutputBase::GetAudioData(), and Process().

In()

AudioFormat AudioConvert::In ( void  )

inline

Definition at line 50 of file audioconvert.h.

InterleaveSamples() [1/4]

void AudioConvert::InterleaveSamples ( AudioFormat  format, int  channels, uint8_t *  output, const uint8_t *const *  input, int  data_size  )

static

Interleave input samples Planar audio is contained in array of pointers Interleave audio samples (convert from planar format)

Definition at line 834 of file audioconvert.cpp.

InterleaveSamples() [2/4]

void AudioConvert::InterleaveSamples ( AudioFormat  format, int  channels, uint8_t *  output, const uint8_t *  input, int  data_size  )

static

Interleave input samples Interleave audio samples (convert from planar format)

Definition at line 860 of file audioconvert.cpp.

InterleaveSamples() [3/4]

void AudioConvert::InterleaveSamples	(	int	channels,
		uint8_t *	output,
		const uint8_t *const *	input,
		int	data_size
	)

Definition at line 886 of file audioconvert.cpp.

Referenced by AudioOutput::DecodeAudio(), and InterleaveSamples().

InterleaveSamples() [4/4]

void AudioConvert::InterleaveSamples	(	int	channels,
		uint8_t *	output,
		const uint8_t *	input,
		int	data_size
	)

Definition at line 893 of file audioconvert.cpp.

MonoToStereo()

void AudioConvert::MonoToStereo ( void *  dst, const void *  src, int  samples  )

static

Convert a mono stream to stereo by copying and interleaving samples.

Definition at line 731 of file audioconvert.cpp.

Referenced by AudioOutputBase::CopyWithUpmix().

operator!=()

bool AudioConvert::operator!= ( const AudioConvert &  rhs ) const

inline

Definition at line 54 of file audioconvert.h.

operator==()

bool AudioConvert::operator== ( const AudioConvert &  rhs ) const

inline

Definition at line 52 of file audioconvert.h.

Out()

AudioFormat AudioConvert::Out ( void  )

inline

Definition at line 49 of file audioconvert.h.

Referenced by AudioOutput::DecodeAudio().

Process()

int AudioConvert::Process	(	void *	out,
		const void *	in,
		int	bytes,
		bool	noclip = false
	)

Process Parameters: out : destination buffer where converted samples will be copied in : source buffer bytes: size in bytes of source buffer.

Convert samples from one format to another.

Return Value: size in bytes of samples converted or <= 0 if error

Consumes 'bytes' bytes from in and returns the numer of bytes written to out return negative number if error

Definition at line 657 of file audioconvert.cpp.

Referenced by AudioOutput::DecodeAudio().

toFloat()

int AudioConvert::toFloat ( AudioFormat  format, void *  out, const void *  in, int  bytes  )

static

Convert integer samples to floats.

Consumes 'bytes' bytes from in and returns the numer of bytes written to out

Definition at line 525 of file audioconvert.cpp.

Referenced by AudioOutputBase::AddData(), Process(), and MythAVFormatWriter::WriteAudioFrame().

Member Data Documentation

m_ctx

AudioConvertInternal* AudioConvert::m_ctx {nullptr}

private

Definition at line 81 of file audioconvert.h.

Referenced by Process(), and ~AudioConvert().

m_in

AudioFormat AudioConvert::m_in

private

Definition at line 82 of file audioconvert.h.

Referenced by DeinterleaveSamples(), InterleaveSamples(), operator!=(), operator==(), and Process().

m_out

AudioFormat AudioConvert::m_out

private

Definition at line 82 of file audioconvert.h.

Referenced by operator!=(), operator==(), and Process().

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

• mythtv/libs/libmythtv/audio/audioconvert.h
• mythtv/libs/libmythtv/audio/audioconvert.cpp