NAME
SoAudioDevice -
The SoAudioDevice class is used to control an audio device.
The SoAudioDevice class is responsible for initialization of an audio
device, as well as enabling and disabling sound. It is a singleton
class.
SYNOPSIS
#include <Inventor/misc/SoAudioDevice.h>
Public Member Functions
SbBool init (const SbString &devicetype, const SbString &devicename)
SbBool enable ()
void disable ()
SbBool isEnabled ()
SbBool haveSound ()
void setGain (float gain)
void mute (SbBool mute=1)
Static Public Member Functions
static SoAudioDevice * instance ()
Detailed Description
The SoAudioDevice class is used to control an audio device.
The SoAudioDevice class is responsible for initialization of an audio
device, as well as enabling and disabling sound. It is a singleton
class.
The application programmer does not need to use this class directly, as
audio support is enabled by default, and the default settings are
reasonable.
Coin uses OpenAL (http://www.openal.org/,
http://developer.soundblaster.com [Games section]) to render audio.
OpenAL should work with any soundcard, and on most modern operating
systems (including Unix, Linux, IRIX, *BSD, Mac OS X and Microsoft
Windows). 2 speaker output is always available, and on some OS and
soundcard combinations, more advanced speaker configurations are
supported. On Microsoft Windows, OpenAL can use DirectSound3D to render
audio, thus supporting any speaker configuration the current
DirectSound3D driver supports. Configuring speakers are done through
the soundcard driver, and is transparent to both Coin and OpenAL.
Member Function Documentation
SoAudioDevice * SoAudioDevice::instance () [static] Returns a pointer to
the SoAudioDevice class, which is a singleton.
SbBool SoAudioDevice::init (const SbString & devicetype, const SbString &
devicename) Initializes the audio device. Currently, the only supported
devicetype is ’OpenAL’. The supported devicename depends on the OS and
on installed soundcards and drivers. On Microsoft Windows, supported
device names are ’DirectSound3D’, ’DirectSound’, and ’MMSYSTEM’. See
OpenAL documentation (available from http://www.openal.org/) for
further information.
The application programmer may override the default setting by calling
this method with the wanted device type and name.
The user can also control which devicename OpenAL uses by setting the
COIN_SOUND_DRIVER_NAME environment variable. On Microsoft Windows, the
default driver name is ’DirectSound3D’, which should normally be what
the user wants.
SbBool SoAudioDevice::enable () Enables sound
void SoAudioDevice::disable () Disables sound. Effectively silencing all
audio output.
SbBool SoAudioDevice::isEnabled (void) Returns TRUE if audio is enabled.
SbBool SoAudioDevice::haveSound () returns true if the audio device has
been initialized successfully.
Author
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