AACDecoderHelix Class Reference

AAC Decoder using libhelix: https://github.com/pschatzmann/arduino-libhelix This is basically just a simple wrapper to provide AudioInfo and AudioInfoSupport. More...

#include <CodecAACHelix.h>

Inheritance diagram for AACDecoderHelix:

Public Member Functions
	AACDecoderHelix (Print &out_stream)
	Construct a new AACDecoderMini object. More...
	AACDecoderHelix (Print &out_stream, AudioInfoSupport &bi)
	Construct a new AACDecoderMini object. The decoded output will go to the print object. More...
	~AACDecoderHelix ()
	Destroy the AACDecoderMini object.
virtual void	addNotifyAudioChange (AudioInfoSupport &bi)
	Adds target to be notified about audio changes.
AudioInfo	audioInfo () override
	provides the actual input AudioInfo
virtual _AACFrameInfo	audioInfoEx ()
virtual AudioInfo	audioInfoOut ()
	provides the actual output AudioInfo: this is usually the same as audioInfo() unless we use a transforming stream
bool	begin () override
	Starts the processing.
virtual bool	begin (AudioInfo info) override
virtual void	clearNotifyAudioChange ()
	Deletes all change notify subscriptions.
virtual void	end () override
	Releases the reserved memory.
void	flush ()
bool	isNotifyActive ()
	Checks if the automatic AudioInfo update is active.
virtual bool	isResultPCM ()
	Returns true to indicate that the decoding result is PCM data.
size_t	maxFrameSize ()
	Provides the maximum frame size - this is allocated on the heap and you can reduce the heap size my minimizing this value.
size_t	maxPCMSize ()
	Provides the maximum pwm buffer size - this is allocated on the heap and you can reduce the heap size my minimizing this value.
virtual	operator bool () override
	checks if the class is active
virtual bool	removeNotifyAudioChange (AudioInfoSupport &bi)
	Removes a target in order not to be notified about audio changes.
void	setAudioInfo (AudioInfo info) override
	for most decoders this is not needed
void	setAudioInfoNotifications (bool active)
void	setMaxFrameSize (size_t len)
	Define your optimized maximum frame size.
void	setMaxPCMSize (size_t len)
	Define your optimized maximum pwm buffer size.
void	setNotifyActive (bool flag)
	Deactivate/Reactivate automatic AudioInfo updates: (default is active)
virtual void	setOutput (AudioOutput &out_stream)
	Defines where the decoded result is written to.
virtual void	setOutput (AudioStream &out_stream)
	Defines where the decoded result is written to.
virtual void	setOutput (Print &out_stream)
	Defines the output Stream.
size_t	write (const uint8_t *data, size_t len) override
	Write AAC data to decoder.

Static Public Member Functions
static void	infoCallback (_AACFrameInfo &i, void *ref)
	notifies the subscriber about a change

Public Attributes
int	id
	custom id to be used by application

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

Protected Attributes
libhelix::AACDecoderHelix *	aac =nullptr
AudioInfo	info
bool	info_notifications_active = true
bool	is_notify_active = true
Vector< AudioInfoSupport * >	notify_vector
Print *	p_print = nullptr

Detailed Description

AAC Decoder using libhelix: https://github.com/pschatzmann/arduino-libhelix This is basically just a simple wrapper to provide AudioInfo and AudioInfoSupport.

Author

Phil Schatzmann

Copyright

GPLv3

Constructor & Destructor Documentation

AACDecoderHelix() [1/2]

AACDecoderHelix ( Print &  out_stream )

inline

Construct a new AACDecoderMini object.

Parameters

out_stream

AACDecoderHelix() [2/2]

AACDecoderHelix ( Print &  out_stream, AudioInfoSupport &  bi  )

inline

Construct a new AACDecoderMini object. The decoded output will go to the print object.

Parameters

out_stream
bi

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

• src/AudioTools/AudioCodecs/CodecAACHelix.h