OpusMultiStreamAudioEncoder Class Reference

Encoder for Opus multistream audio. Supports up to 255 channels by combining multiple Opus streams into a single packet. Each fully encoded frame is written to the output stream. More...

#include <CodecOpusMultiStream.h>

Inheritance diagram for OpusMultiStreamAudioEncoder:

Public Member Functions
	OpusMultiStreamAudioEncoder ()=default
	OpusMultiStreamAudioEncoder (Print &out)
AudioInfo	audioInfo () override
	provides the actual input AudioInfo
virtual AudioInfo	audioInfoOut ()
bool	begin () override
virtual bool	begin (AudioInfo info)
bool	begin (OpusMultiStreamEncoderSettings settings)
OpusMultiStreamEncoderSettings &	config ()
OpusMultiStreamEncoderSettings &	defaultConfig ()
void	end () override
virtual uint32_t	frameDurationUs ()
	Optional rtsp function: provide the frame duration in microseconds.
int	frameSizeSamples ()
bool	isOpen ()
int	lookaheadSamples ()
const char *	mime () override
	Provides the mime type of the encoded result.
	operator bool () override
int	pendingSamples ()
uint16_t	samplesPerFrame ()
	Optional rtsp function: provide samples per the frame.
void	setAudioInfo (AudioInfo from) override
	Defines the sample rate, number of channels and bits per sample.
void	setOutput (Print &out_stream) override
	Default output assignment (encoders may override to store Print reference)
size_t	write (const uint8_t *data, size_t len) override

Protected Member Functions
void	encodeByte (uint8_t data)
void	encodeFrame ()
int	getFrameSizeSamples (int sampling_rate)
bool	settings ()
void	writeBlocking (Print *out, uint8_t *data, size_t len)

Protected Attributes
OpusMultiStreamEncoderSettings	cfg
OpusMSEncoder *	enc = nullptr
Vector< uint8_t >	frame {0}
int	frame_pos = 0
AudioInfo	info
bool	is_open = false
Print *	p_print = nullptr
Vector< uint8_t >	packet {0}

Detailed Description

Encoder for Opus multistream audio. Supports up to 255 channels by combining multiple Opus streams into a single packet. Each fully encoded frame is written to the output stream.

Warning

The decoder needs a lot of stack space: SET_LOOP_TASK_STACK_SIZE(16 * 1024);

Depends on https://github.com/pschatzmann/arduino-libopus.git

Author

Phil Schatzmann

Copyright

GPLv3

Constructor & Destructor Documentation

OpusMultiStreamAudioEncoder() [1/2]

OpusMultiStreamAudioEncoder ( )

default

OpusMultiStreamAudioEncoder() [2/2]

OpusMultiStreamAudioEncoder ( Print &  out )

inline

Member Function Documentation

audioInfo()

AudioInfo audioInfo ( )

inlineoverridevirtualinherited

provides the actual input AudioInfo

Implements AudioInfoSupport.

Reimplemented in CodecNOP, MP3EncoderShine, BinaryContainerEncoder, and MP3ParserEncoder.

audioInfoOut()

virtual AudioInfo audioInfoOut ( )

inlinevirtualinherited

provides the actual output AudioInfo: this is usually the same as audioInfo() unless we use a transforming stream

Reimplemented in MP3EncoderShine, PureDataStream, PWMAudioOutput< PWMDriverT >, ChannelFormatConverterStreamT< T >, ChannelFormatConverterStream, NumberFormatConverterStreamT< TFrom, TTo >, NumberFormatConverterStream, FormatConverterStream, Pipeline, ResampleStream, and ResampleStreamT< TInterpolator >.

begin() [1/3]

bool begin ( )

inlineoverridevirtual

Implements AudioWriter.

begin() [2/3]

virtual bool begin ( AudioInfo  info )

inlinevirtualinherited

Reimplemented in OpusOggEncoder, OggContainerEncoder, DecoderBasic, AudioDecoder, AACEncoderFDK, AACEncoderVO, OggContainerDecoder, and MetaDataFilterEncoder.

begin() [3/3]

bool begin ( OpusMultiStreamEncoderSettings  settings )

inline

config()

OpusMultiStreamEncoderSettings & config ( )

inline

defaultConfig()

OpusMultiStreamEncoderSettings & defaultConfig ( )

inline

encodeByte()

void encodeByte ( uint8_t  data )

inlineprotected

encodeFrame()

void encodeFrame ( )

inlineprotected

end()

void end ( )

inlineoverridevirtual

Implements AudioWriter.

frameDurationUs()

virtual uint32_t frameDurationUs ( )

inlinevirtualinherited

Optional rtsp function: provide the frame duration in microseconds.

Reimplemented in ADPCMEncoder, MP3EncoderShine, OpusOggEncoder, MP3ParserEncoder, and MetaDataFilterEncoder.

frameSizeSamples()

int frameSizeSamples ( )

inline

getFrameSizeSamples()

int getFrameSizeSamples ( int  sampling_rate )

inlineprotected

isOpen()

bool isOpen ( )

inline

lookaheadSamples()

int lookaheadSamples ( )

inline

mime()

const char * mime ( )

inlineoverridevirtual

Provides the mime type of the encoded result.

Implements AudioEncoder.

operator bool()

operator bool ( )

inlineoverridevirtual

Implements AudioWriter.

pendingSamples()

int pendingSamples ( )

inline

samplesPerFrame()

uint16_t samplesPerFrame ( )

inlinevirtual

Optional rtsp function: provide samples per the frame.

Reimplemented from AudioEncoder.

setAudioInfo()

void setAudioInfo ( AudioInfo  from )

inlineoverridevirtual

Defines the sample rate, number of channels and bits per sample.

Reimplemented from AudioEncoder.

setOutput()

void setOutput ( Print &  out_stream )

inlineoverridevirtual

Default output assignment (encoders may override to store Print reference)

Reimplemented from AudioEncoder.

settings()

bool settings ( )

inlineprotected

write()

size_t write ( const uint8_t *  data, size_t  len  )

inlineoverridevirtual

Implements AudioWriter.

writeBlocking()

void writeBlocking ( Print *  out, uint8_t *  data, size_t  len  )

inlineprotectedinherited

Member Data Documentation

cfg

OpusMultiStreamEncoderSettings cfg

protected

enc

OpusMSEncoder* enc = nullptr

protected

frame

Vector<uint8_t> frame {0}

protected

frame_pos

int frame_pos = 0

protected

info

AudioInfo info

protectedinherited

is_open

bool is_open = false

protected

p_print

Print* p_print = nullptr

protected

packet

Vector<uint8_t> packet {0}

protected

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

• src/AudioTools/AudioCodecs/CodecOpusMultiStream.h