AudioHardwareInterface.h defines the interface to the audio hardware abstraction layer. More...

Public Member Functions
virtual void	closeInputStream (AudioStreamIn *in)=0

virtual void	closeOutputStream (AudioStreamOut *out)=0

virtual status_t	dumpState (int fd, const Vector< String16 > &args)=0
	This method dumps the state of the audio hardware. More...

virtual size_t	getInputBufferSize (uint32_t sampleRate, int format, int channelCount)=0

virtual status_t	getMicMute (bool *state)=0

virtual String8	getParameters (const String8 &keys)=0

virtual status_t	initCheck ()=0
	check to see if the audio hardware interface has been initialized. More...

virtual AudioStreamIn *	openInputStream (uint32_t devices, int format, uint32_t channels, uint32_t sampleRate, status_t status, AudioSystem::audio_in_acoustics acoustics)=0
	This method creates and opens the audio hardware input stream. More...

virtual AudioStreamOut *	openOutputStream (uint32_t devices, int format=0, uint32_t channels=0, uint32_t sampleRate=0, status_t status=0)=0
	This method creates and opens the audio hardware output stream. More...

virtual status_t	setMasterVolume (float volume)=0
	set the audio volume for all audio activities other than voice call. More...

virtual status_t	setMicMute (bool state)=0

virtual status_t	setMode (int mode)=0
	setMode is called when the audio mode changes. More...

virtual status_t	setParameters (const String8 &keyValuePairs)=0

virtual status_t	setVoiceVolume (float volume)=0
	set the audio volume of a voice call. More...

virtual	~AudioHardwareInterface ()

Static Public Member Functions
static AudioHardwareInterface *	create ()

Protected Member Functions
virtual status_t	dump (int fd, const Vector< String16 > &args)=0

Detailed Description

AudioHardwareInterface.h defines the interface to the audio hardware abstraction layer.

The interface supports setting and getting parameters, selecting audio routing paths, and defining input and output streams.

AudioFlinger initializes the audio hardware and immediately opens an output stream. You can set Audio routing to output to handset, speaker, Bluetooth, or a headset.

The audio input stream is initialized when AudioFlinger is called to carry out a record operation.

Definition at line 191 of file AudioHardwareInterface.h.

Constructor & Destructor Documentation

virtual android_audio_legacy::AudioHardwareInterface::~AudioHardwareInterface ( )

inlinevirtual

Definition at line 194 of file AudioHardwareInterface.h.

Member Function Documentation

virtual void android_audio_legacy::AudioHardwareInterface::closeInputStream ( AudioStreamIn * in )

pure virtual

virtual void android_audio_legacy::AudioHardwareInterface::closeOutputStream ( AudioStreamOut * out )

pure virtual

static AudioHardwareInterface* android_audio_legacy::AudioHardwareInterface::create ( )

static

virtual status_t android_audio_legacy::AudioHardwareInterface::dump	(	int	fd,
		const Vector< String16 > &	args
	)

protectedpure virtual

virtual status_t android_audio_legacy::AudioHardwareInterface::dumpState	(	int	fd,
		const Vector< String16 > &	args
	)

pure virtual

This method dumps the state of the audio hardware.

virtual size_t android_audio_legacy::AudioHardwareInterface::getInputBufferSize	(	uint32_t	sampleRate,
		int	format,
		int	channelCount
	)

pure virtual

virtual status_t android_audio_legacy::AudioHardwareInterface::getMicMute ( bool * state )

pure virtual

virtual String8 android_audio_legacy::AudioHardwareInterface::getParameters ( const String8 & keys )

pure virtual

virtual status_t android_audio_legacy::AudioHardwareInterface::initCheck ( )

pure virtual

check to see if the audio hardware interface has been initialized.

return status based on values defined in include/utils/Errors.h

virtual AudioStreamIn* android_audio_legacy::AudioHardwareInterface::openInputStream	(	uint32_t	devices,
		int *	format,
		uint32_t *	channels,
		uint32_t *	sampleRate,
		status_t *	status,
		AudioSystem::audio_in_acoustics	acoustics
	)

pure virtual

This method creates and opens the audio hardware input stream.

virtual AudioStreamOut* android_audio_legacy::AudioHardwareInterface::openOutputStream	(	uint32_t	devices,
		int *	format = `0`,
		uint32_t *	channels = `0`,
		uint32_t *	sampleRate = `0`,
		status_t *	status = `0`
	)

pure virtual

This method creates and opens the audio hardware output stream.

virtual status_t android_audio_legacy::AudioHardwareInterface::setMasterVolume ( float volume )

pure virtual

set the audio volume for all audio activities other than voice call.

Range between 0.0 and 1.0. If any value other than NO_ERROR is returned, the software mixer will emulate this capability.

virtual status_t android_audio_legacy::AudioHardwareInterface::setMicMute ( bool state )

pure virtual

virtual status_t android_audio_legacy::AudioHardwareInterface::setMode ( int mode )

pure virtual

setMode is called when the audio mode changes.

NORMAL mode is for standard audio playback, RINGTONE when a ringtone is playing, and IN_CALL when a call is in progress.

virtual status_t android_audio_legacy::AudioHardwareInterface::setParameters ( const String8 & keyValuePairs )

pure virtual

virtual status_t android_audio_legacy::AudioHardwareInterface::setVoiceVolume ( float volume )

pure virtual

set the audio volume of a voice call.

Range is between 0.0 and 1.0

Public Member Functions

Static Public Member Functions

Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation