Game Environment - Beginning Android 3D Game Development - page 183

Listing 6-1. Sound Constructor
Sound(Context iContext, SoundPool Pool, int ResourceID)
{
m_SoundPool = Pool;
m_SoundIndex = m_SoundPool.load(iContext, ResourceID, 1);
}
In terms of playing back a sound, the left speaker volume output m_LeftVolume accepts the range
0 to 1.
float m_LeftVolume = 1;
The right speaker volume level m_RightVolume also accepts the range 0 to 1.
float m_RightVolume = 1;
In terms of the priority level for playback m_Priority (required if resources are limited), the higher the
number, the greater the priority.
int m_Priority = 1;
The variable m_Loop determines if the sound is looped or not. A negative value means the sound will
be looped forever. A positive number specifies the number of times to loop the sound. A 0 indicates
that there is no looping.
int m_Loop = 0;
The variable m_Rate determines the rate at which to play back the sound. A 1.0 would play the
sound back normally. A 2.0 would play back the sound at twice the rate as normal. The range
is 0.5 to 2.0.
float m_Rate = 1;
The PlaySound() function plays back the sound by calling the associated sound pool's play()
function with the index of the sound m_SoundIndex , along with parameters describing how you
should play the sound. By default, we play back the sound at full volume on the left and right
speakers at the normal rate, without any looping of the sound. (See Listing 6-2.)
Listing 6-2. Playing Back a Sound
void PlaySound()
{
/*
* soundID a soundID returned by the load() function
leftVolume left volume value (range = 0.0 to 1.0)
rightVolume right volume value (range = 0.0 to 1.0)
priority stream priority (0 = lowest priority)