APTXEncoder Class Reference

Encoder for OpenAptx - Depends on https://github.com/pschatzmann/libopenaptx. More...

#include <CodecAPTX.h>

Inheritance diagram for APTXEncoder:

Public Member Functions
	APTXEncoder (bool isHd=false)
AudioInfo	audioInfo () override
	provides the actual input AudioInfo
virtual AudioInfo	audioInfoOut ()
bool	begin ()
virtual bool	begin (AudioInfo info)
virtual void	end ()
virtual uint32_t	frameDurationUs ()
	Optional rtsp function: provide the frame duration in microseconds.
virtual int	frameSize ()
virtual const char *	mime ()
	Provides the mime type of the encoded result.
	operator bool ()
virtual uint16_t	samplesPerFrame ()
	Optional rtsp function: provide samples per the frame.
virtual void	setAudioInfo (AudioInfo info)
	Defines the input AudioInfo.
virtual void	setOutput (Print &out_stream)
	Default output assignment (encoders may override to store Print reference)
virtual size_t	write (const uint8_t *data, size_t len)

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

Protected Attributes
struct aptx_context *	ctx = nullptr
AudioInfo	info
Vector< int24_t >	input_buffer {4 * 2}
int	input_pos = 0
bool	is_hd
Vector< uint8_t >	output_buffer
int	output_pos = 0
Print *	p_print = nullptr

Detailed Description

Encoder for OpenAptx - Depends on https://github.com/pschatzmann/libopenaptx.

Author

Phil Schatzmann

Copyright

GPLv3

Constructor & Destructor Documentation

APTXEncoder()

APTXEncoder ( bool  isHd = false )

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, ResampleStreamT< TInterpolator >, and SupportedRatesStream.

begin() [1/2]

bool begin ( )

inlinevirtual

Implements AudioWriter.

begin() [2/2]

virtual bool begin ( AudioInfo  info )

inlinevirtualinherited

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

end()

virtual void end ( )

inlinevirtual

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.

frameSize()

virtual int frameSize ( )

inlinevirtualinherited

Optional rtsp function: provide the encoded size (in bytes) of one frame, once known (e.g. after the encoder has seen real data). Lets an RTSPFormat size its RTP fragments to match one frame instead of a fixed guess, so throughput actually tracks frameDurationUs() - a fragment size covering several frames' worth of bytes sent at one-frame timing overruns real-time bandwidth and, over UDP (no flow control), causes packet loss. Returns 0 if not yet known/not applicable (fixed-frame-size codecs have no need to override this).

Reimplemented in ADPCMEncoder, EncoderALAC, AMRNBEncoder, AMRWBEncoder, and MP3ParserEncoder.

mime()

virtual const char * mime ( )

inlinevirtual

Provides the mime type of the encoded result.

Implements AudioEncoder.

operator bool()

operator bool ( )

inlinevirtual

Implements AudioWriter.

samplesPerFrame()

virtual uint16_t samplesPerFrame ( )

inlinevirtualinherited

Optional rtsp function: provide samples per the frame.

Reimplemented in OpusAudioEncoder, OpusMultiStreamAudioEncoder, MP3EncoderShine, MP3ParserEncoder, and MetaDataFilterEncoder.

setAudioInfo()

virtual void setAudioInfo ( AudioInfo  info )

inlinevirtual

Defines the input AudioInfo.

Implements AudioWriter.

setOutput()

virtual void setOutput ( Print &  out_stream )

inlinevirtual

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

Reimplemented from AudioEncoder.

write()

virtual size_t write ( const uint8_t *  data, size_t  len  )

inlinevirtual

Implements AudioWriter.

writeBlocking()

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

inlineprotectedinherited

Member Data Documentation

ctx

struct aptx_context* ctx = nullptr

protected

info

AudioInfo info

protectedinherited

input_buffer

Vector<int24_t> input_buffer {4 * 2}

protected

input_pos

int input_pos = 0

protected

is_hd

bool is_hd

protected

output_buffer

Vector<uint8_t> output_buffer

protected

output_pos

int output_pos = 0

protected

p_print

Print* p_print = nullptr

protected

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

• src/AudioTools/AudioCodecs/CodecAPTX.h