class Audio

Audio class

Public Methods

	Audio () Constructor. Set initial variable values.
int	get_num_channels (void) Return the number of channels.
int	get_SR (void) Return the sample rate.
void	init_afile (void) Set sample rate and number of channels.
void	init_audio (void) Connect to audio server. Create sample actor for sound playback.
void	jump_song (float spot) Jump to the current "time" in the sound sample
void	kill_audio (void) Kill the sound server and delete the sample actor.
double	play_audio (void) Start the sound sample playing and send a message that the simulation has begun

Private Fields

int	afile_num_channels
int	afile_SR
float	aSampleActor
int	audio_connected
char*	name
char*	path
const double	PLAY_LATENCY_ESTIMATE Lag time between sound trigger and sound start
float	sound

Audio()

Constructor. Set initial variable values.

void init_audio(void)

Connect to audio server. Create sample actor for sound playback.

void init_afile(void)

Set sample rate and number of channels.

double play_audio(void)

Start the sound sample playing and send a message that the simulation has begun

void jump_song(float spot)

Jump to the current "time" in the sound sample. Function is called every few frames to keep the audio and video synchronized.

Parameters:

spot - The time in seconds since the graphics have begun. Sound will jump "spot" seconds into the audio file. *

void kill_audio(void)

Kill the sound server and delete the sample actor.

int get_SR(void)

Return the sample rate.

int get_num_channels(void)

Return the number of channels.

const double PLAY_LATENCY_ESTIMATE

Lag time between sound trigger and sound start

int afile_SR

int afile_num_channels

float aSampleActor

float sound

int audio_connected

char* path

char* name

alphabetic index hierarchy of classes

M4cave Sound Visualization

Contacts

• Hans Kaper, kaper@mcs.anl.gov
• Sever Tipei, s-tipei@uiuc.edu
• Elizabeth Wiebel, wiebep@sncac.snc.edu

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