VolumeControl< N > Class Template Reference

#include <Audio/VolumeControl.hpp>

Detailed Description

template<uint8_t N>
class VolumeControl< N >

A class for controlling the volume of AudioMixer4 objects using a potentiometer.

Template Parameters

N	The number of mixers.

Examples

1.Volume-Controlled-USB-DAC.ino, and 2.VU-Meter-OLED-USB-DAC.ino.

Definition at line 23 of file VolumeControl.hpp.

Inheritance diagram for VolumeControl< N >:

Collaboration diagram for VolumeControl< N >:

Enabling and disabling updatables
void	enable ()
	Enable this updatable: insert it into the linked list of instances, so it gets updated automatically.
void	disable ()
	Disable this updatable: remove it from the linked list of instances, so it no longer gets updated automatically.
bool	isEnabled () const
	Check if this updatable is enabled.
void	moveDown ()
	Move down this element in the list.

Main initialization and updating methods
static void	beginAll ()
	Begin all enabled instances of this class.
static void	updateAll ()
	Update all enabled instances of this class.

Public Member Functions
	VolumeControl (const Array< AudioMixer4 *, N > &mixers, pin_t analogPin, float maxGain=1.0)
	Create a new VolumeControl object.
void	update () override
	Read the potentiometer value, and adjust the gain of the mixers.
void	begin () override
	Initialize.
void	map (MappingFunction fn)
	Specify a mapping function that is applied to the raw analog value before setting the volume.
void	invert ()
	Invert the analog value.

Protected Attributes
Updatable< NormalUpdatable > *	next
Updatable< NormalUpdatable > *	previous

Static Protected Attributes
static DoublyLinkedList< Updatable< NormalUpdatable > >	updatables

Private Attributes
Array< AudioMixer4 *, N >	mixers
AH::FilteredAnalog	filteredAnalog
const float	maxGain

Constructor & Destructor Documentation

VolumeControl()

template<uint8_t N>

VolumeControl ( const Array< AudioMixer4 *, N > & mixers, pin_t analogPin, float maxGain = 1.0 )

inline

Create a new VolumeControl object.

Parameters

mixers	An array of pointers to audio mixers. Only the pointers are saved, so the mixers should outlive this object.
analogPin	The analog pin with the potentiometer connected.
maxGain	The maximum gain for the mixers.

Definition at line 37 of file VolumeControl.hpp.

Member Function Documentation

update()

template<uint8_t N>

void update ( )

inlineoverridevirtual

Read the potentiometer value, and adjust the gain of the mixers.

Implements Updatable< T >.

Examples

1.Volume-Controlled-USB-DAC.ino.

Definition at line 44 of file VolumeControl.hpp.

begin()

template<uint8_t N>

void begin ( )

inlineoverridevirtual

Initialize.

Implements Updatable< T >.

Examples

1.Volume-Controlled-USB-DAC.ino.

Definition at line 56 of file VolumeControl.hpp.

map()

template<uint8_t N>

void map ( MappingFunction fn )

inline

Specify a mapping function that is applied to the raw analog value before setting the volume.

Parameters

fn	A function pointer to the mapping function. This function should take the filtered analog value of \( 16 - \mathrm{ANALOG\_FILTER\_SHIFT\_FACTOR} \) bits as a parameter, and should return a value in the same range.

See also

FilteredAnalog::map

Definition at line 70 of file VolumeControl.hpp.

invert()

template<uint8_t N>

void invert ( )

inline

Invert the analog value.

Definition at line 73 of file VolumeControl.hpp.

beginAll()

template<class T = NormalUpdatable>

void beginAll ( )

inlinestaticinherited

Begin all enabled instances of this class.

See also

begin()

Definition at line 182 of file Updatable.hpp.

updateAll()

template<class T = NormalUpdatable>

void updateAll ( )

inlinestaticinherited

Update all enabled instances of this class.

See also

update()

Definition at line 186 of file Updatable.hpp.

enable()

void enable ( )

inlineinherited

Enable this updatable: insert it into the linked list of instances, so it gets updated automatically.

Definition at line 96 of file Updatable.hpp.

disable()

void disable ( )

inlineinherited

Disable this updatable: remove it from the linked list of instances, so it no longer gets updated automatically.

Definition at line 106 of file Updatable.hpp.

isEnabled()

bool isEnabled ( ) const

inlineinherited

Check if this updatable is enabled.

Note

Assumes that the updatable is not added to a different linked list by the user.

Definition at line 120 of file Updatable.hpp.

moveDown()

void moveDown ( )

inlineinherited

Move down this element in the list.

Definition at line 147 of file Updatable.hpp.

Member Data Documentation

mixers

template<uint8_t N>

Array<AudioMixer4 *, N> mixers

private

Definition at line 76 of file VolumeControl.hpp.

filteredAnalog

template<uint8_t N>

AH::FilteredAnalog filteredAnalog

private

Definition at line 77 of file VolumeControl.hpp.

maxGain

template<uint8_t N>

const float maxGain

private

Definition at line 78 of file VolumeControl.hpp.

updatables

DoublyLinkedList<Updatable< NormalUpdatable >> updatables

staticprotectedinherited

Definition at line 152 of file Updatable.hpp.

next

Updatable< NormalUpdatable >* next

protectedinherited

Definition at line 320 of file LinkedList.hpp.

previous

Updatable< NormalUpdatable >* previous

protectedinherited

Definition at line 321 of file LinkedList.hpp.

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

• VolumeControl.hpp