OpusAudioEncoder Class Reference

Encode for Opus audio. More...

#include <CodecOpus.h>

Inheritance diagram for OpusAudioEncoder:

Public Member Functions
	OpusAudioEncoder (Print &out)
AudioInfo	audioInfo () override
	provides the actual input AudioInfo
virtual AudioInfo	audioInfoOut ()
bool	begin () override
	starts the processing using the actual OpusAudioInfo
virtual bool	begin (AudioInfo info)
bool	begin (OpusEncoderSettings settings)
OpusEncoderSettings &	config ()
	Provides access to the configuration.
OpusEncoderSettings &	defaultConfig ()
void	end () override
	stops the processing
virtual uint32_t	frameDurationUs ()
	Optional rtsp function: provide the frame duration in microseconds.
bool	isOpen ()
const char *	mime () override
	Provides "audio/pcm".
	operator bool () override
virtual uint16_t	samplesPerFrame ()
	Optional rtsp function: provide samples per the frame.
void	setAudioInfo (AudioInfo from) override
	We actually do nothing with this.
void	setOutput (Print &out_stream) override
	Defines the output Stream.
size_t	write (const uint8_t *data, size_t len) override
	Writes PCM data to be encoded as Opus.

Protected Member Functions
void	encodeByte (uint8_t data)
void	encodeFrame ()
int	getFrameSizeSamples (int sampling_rate)
	Returns the frame size in samples.
bool	settings ()
void	writeBlocking (Print *out, uint8_t *data, size_t len)

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

Detailed Description

Encode for Opus audio.

Depends on https://github.com/pschatzmann/arduino-libopus.git Please note that each fully encoded frame is written to the output stream.

Author

Phil Schatzmann

Copyright

GPLv3

Member Function Documentation

audioInfo()

AudioInfo audioInfo ( )

inlineoverridevirtualinherited

provides the actual input AudioInfo

Implements AudioInfoSupport.

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

begin() [1/2]

bool begin ( )

inlineoverridevirtual

starts the processing using the actual OpusAudioInfo

Implements AudioWriter.

begin() [2/2]

virtual bool begin ( AudioInfo  info )

inlinevirtualinherited

Reimplemented in AACEncoderFDK.

end()

void end ( )

inlineoverridevirtual

stops the processing

Implements AudioWriter.

frameDurationUs()

virtual uint32_t frameDurationUs ( )

inlinevirtualinherited

Optional rtsp function: provide the frame duration in microseconds.

Reimplemented in ADPCMEncoder, OpusOggEncoder, MP3ParserEncoder, and MetaDataFilterEncoder.

mime()

const char * mime ( )

inlineoverridevirtual

Provides "audio/pcm".

Implements AudioEncoder.

operator bool()

operator bool ( )

inlineoverridevirtual

Implements AudioWriter.

samplesPerFrame()

virtual uint16_t samplesPerFrame ( )

inlinevirtualinherited

Optional rtsp function: provide samples per the frame.

Reimplemented in MP3ParserEncoder, and MetaDataFilterEncoder.

setAudioInfo()

void setAudioInfo ( AudioInfo  from )

inlineoverridevirtual

We actually do nothing with this.

Reimplemented from AudioEncoder.

setOutput()

void setOutput ( Print &  out_stream )

inlineoverridevirtual

Defines the output Stream.

Reimplemented from AudioEncoder.

write()

size_t write ( const uint8_t *  data, size_t  len  )

inlineoverridevirtual

Writes PCM data to be encoded as Opus.

Implements AudioWriter.

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

• src/AudioTools/AudioCodecs/CodecOpus.h