using UnityEngine;
using UnityEngine.Audio;
namespace OVR
{
//-------------------------------------------------------------------------
// Types
//-------------------------------------------------------------------------
public enum EmitterChannel {
None = -1,
Reserved = 0, // plays on the single reserved emitter
Any // queues to the next available emitter
}
[System.Serializable]
public class MixerSnapshot {
public AudioMixerSnapshot snapshot = null;
public float transitionTime = 0.25f;
}
/*
-----------------------
GameManager Sound Routines
-----------------------
*/
public partial class AudioManager : MonoBehaviour {
public enum Fade {
In,
Out
}
private float audioMaxFallOffDistanceSqr = 25.0f * 25.0f; // past this distance, sounds are ignored for the local player
private SoundEmitter[] soundEmitters = null; // pool of sound emitters to play sounds through
private FastList<SoundEmitter> playingEmitters = new FastList<SoundEmitter>();
private FastList<SoundEmitter> nextFreeEmitters = new FastList<SoundEmitter>();
private MixerSnapshot currentSnapshot = null;
static private GameObject soundEmitterParent = null; // parent object for the sound emitters
static private Transform staticListenerPosition = null; // play position for regular 2D sounds
static private bool showPlayingEmitterCount = false;
static private bool forceShowEmitterCount = false;
static private bool soundEnabled = true;
static public bool SoundEnabled { get { return soundEnabled; } }
static readonly AnimationCurve defaultReverbZoneMix = new AnimationCurve( new Keyframe[2] { new Keyframe( 0f, 1.0f ), new Keyframe( 1f, 1f ) } );
// Calculate the maximum number of emitters that can be running at one time.
static private int CalculateMaxEmittersSize() {
return theAudioManager.maxSoundEmitters + (int)EmitterChannel.Any;
}
// Verify if this index is valid
static private bool ValidateEmitterIndex(int index) {
return index > -1 && index < CalculateMaxEmittersSize();
}
/*
-----------------------
InitializeSoundSystem()
initialize persistent sound emitter objects that live across scene loads
-----------------------
*/
void InitializeSoundSystem() {
int bufferLength = 960;
int numBuffers = 4;
AudioSettings.GetDSPBufferSize( out bufferLength, out numBuffers );
if ( Application.isPlaying ) {
Debug.Log( "[AudioManager] Audio Sample Rate: " + AudioSettings.outputSampleRate );
Debug.Log( "[AudioManager] Audio Buffer Length: " + bufferLength + " Size: " + numBuffers );
}
// find the audio listener for playing regular 2D sounds
AudioListener audioListenerObject = GameObject.FindObjectOfType<AudioListener>() as AudioListener;
if ( audioListenerObject == null ) {
Debug.LogError( "[AudioManager] Missing AudioListener object! Add one to the scene." );
} else {
staticListenerPosition = audioListenerObject.transform;
}
// we allocate maxSoundEmitters + reserved channels
soundEmitters = new SoundEmitter[CalculateMaxEmittersSize()];
// see if the sound emitters have already been created, if so, nuke it, it shouldn't exist in the scene upon load
soundEmitterParent = GameObject.Find( "__SoundEmitters__" );
if ( soundEmitterParent != null ) {
// delete any sound emitters hanging around
Destroy( soundEmitterParent );
}
// create them all
soundEmitterParent = new GameObject( "__SoundEmitters__" );
for ( int i = 0; i < CalculateMaxEmittersSize(); i++ ) {
GameObject emitterObject = new GameObject( "SoundEmitter_" + i );
emitterObject.transform.parent = soundEmitterParent.transform;
emitterObject.transform.position = Vector3.zero;
// don't ever save this to the scene
emitterObject.hideFlags = HideFlags.DontSaveInEditor;
// add the sound emitter components
soundEmitters[i] = emitterObject.AddComponent<SoundEmitter>();
soundEmitters[i].SetDefaultParent( soundEmitterParent.transform );
soundEmitters[i].SetChannel( i );
soundEmitters[i].Stop();
// save off the original index
soundEmitters[i].originalIdx = i;
}
// reset the free emitter lists
ResetFreeEmitters();
soundEmitterParent.hideFlags = HideFlags.DontSaveInEditor;
audioMaxFallOffDistanceSqr = audioMaxFallOffDistance * audioMaxFallOffDistance;
}
/*
-----------------------
UpdateFreeEmitters()
-----------------------
*/
void UpdateFreeEmitters() {
if ( verboseLogging ) {
if ( Input.GetKeyDown( KeyCode.A ) ) {
forceShowEmitterCount = !forceShowEmitterCount;
}
if ( forceShowEmitterCount ) {
showPlayingEmitterCount = true;
}
}
// display playing emitter count when the sound system is overwhelmed
int total = 0, veryLow = 0, low = 0, def = 0, high = 0, veryHigh = 0;
// find emitters that are done playing and add them to the nextFreeEmitters list
for ( int i = 0; i < playingEmitters.size; ) {
if ( playingEmitters[i] == null ) {
Debug.LogError( "[AudioManager] ERROR: playingEmitters list had a null emitter! Something nuked a sound emitter!!!" );
playingEmitters.RemoveAtFast( i );
return;
}
if ( !playingEmitters[i].IsPlaying() ) {
// add to the free list and remove from the playing list
if ( verboseLogging ) {
if ( nextFreeEmitters.Contains( playingEmitters[i] ) ) {
Debug.LogError( "[AudioManager] ERROR: playing sound emitter already in the free emitters list!" );
}
}
playingEmitters[i].Stop();
nextFreeEmitters.Add( playingEmitters[i] );
playingEmitters.RemoveAtFast( i );
continue;
}
// debugging/profiling
if ( verboseLogging && showPlayingEmitterCount ) {
total++;
switch ( playingEmitters[i].priority ) {
case SoundPriority.VeryLow: veryLow++; break;
case SoundPriority.Low: low++; break;
case SoundPriority.Default: def++; break;
case SoundPriority.High: high++; break;
case SoundPriority.VeryHigh: veryHigh++; break;
}
}
i++;
}
if ( verboseLogging && showPlayingEmitterCount ) {
Debug.LogWarning( string.Format( "[AudioManager] Playing sounds: Total {0} | VeryLow {1} | Low {2} | Default {3} | High {4} | VeryHigh {5} | Free {6}", Fmt( total ), Fmt( veryLow ), Fmt( low ), Fmt( def ), Fmt( high ), Fmt( veryHigh ), FmtFree( nextFreeEmitters.Count ) ) );
showPlayingEmitterCount = false;
}
}
/*
-----------------------
Fmt()
-----------------------
*/
string Fmt( int count ) {
float t = count / (float)theAudioManager.maxSoundEmitters;
if ( t < 0.5f ) {
return "<color=green>" + count.ToString() + "</color>";
} else if ( t < 0.7 ) {
return "<color=yellow>" + count.ToString() + "</color>";
} else {
return "<color=red>" + count.ToString() + "</color>";
}
}
/*
-----------------------
FmtFree()
-----------------------
*/
string FmtFree( int count ) {
float t = count / (float)theAudioManager.maxSoundEmitters;
if ( t < 0.2f ) {
return "<color=red>" + count.ToString() + "</color>";
} else if ( t < 0.3 ) {
return "<color=yellow>" + count.ToString() + "</color>";
} else {
return "<color=green>" + count.ToString() + "</color>";
}
}
/*
-----------------------
OnPreSceneLoad()
-----------------------
*/
void OnPreSceneLoad() {
// move any attached sounds back to the sound emitters parent before changing levels so they don't get destroyed
Debug.Log( "[AudioManager] OnPreSceneLoad cleanup" );
for ( int i = 0; i < soundEmitters.Length; i++ ) {
soundEmitters[i].Stop();
soundEmitters[i].ResetParent( soundEmitterParent.transform );
}
// reset our emitter lists
ResetFreeEmitters();
}
/*
-----------------------
ResetFreeEmitters()
-----------------------
*/
void ResetFreeEmitters() {
nextFreeEmitters.Clear();
playingEmitters.Clear();
for ( int i = (int)EmitterChannel.Any; i < soundEmitters.Length; i++ ) {
nextFreeEmitters.Add( soundEmitters[i] );
}
}
/*
-----------------------
FadeOutSoundChannel()
utility function to fade out a playing sound channel
-----------------------
*/
static public void FadeOutSoundChannel( int channel, float delaySecs, float fadeTime ) {
theAudioManager.soundEmitters[channel].FadeOutDelayed( delaySecs, fadeTime );
}
/*
-----------------------
StopSound()
-----------------------
*/
static public bool StopSound( int idx, bool fadeOut = true, bool stopReserved = false ) {
if ( !stopReserved && ( idx == (int)EmitterChannel.Reserved ) ) {
return false;
}
if ( !fadeOut ) {
theAudioManager.soundEmitters[idx].Stop();
}
else {
theAudioManager.soundEmitters[idx].FadeOut( theAudioManager.soundFxFadeSecs );
}
return true;
}
/*
-----------------------
FadeInSound()
-----------------------
*/
public static void FadeInSound( int idx, float fadeTime, float volume ) {
theAudioManager.soundEmitters[idx].FadeIn( fadeTime, volume );
}
/*
-----------------------
FadeInSound()
-----------------------
*/
public static void FadeInSound( int idx, float fadeTime ) {
theAudioManager.soundEmitters[idx].FadeIn( fadeTime );
}
/*
-----------------------
FadeOutSound()
-----------------------
*/
public static void FadeOutSound( int idx, float fadeTime ) {
theAudioManager.soundEmitters[idx].FadeOut( fadeTime );
}
/*
-----------------------
StopAllSounds()
-----------------------
*/
public static void StopAllSounds( bool fadeOut, bool stopReserved = false ) {
for ( int i = 0; i < theAudioManager.soundEmitters.Length; i++ ) {
StopSound( i, fadeOut, stopReserved );
}
}
/*
-----------------------
MuteAllSounds()
-----------------------
*/
public void MuteAllSounds( bool mute, bool muteReserved = false ) {
for ( int i = 0; i < soundEmitters.Length; i++ ) {
if ( !muteReserved && ( i == (int)EmitterChannel.Reserved ) ) {
continue;
}
soundEmitters[i].audioSource.mute = true;
}
}
/*
-----------------------
UnMuteAllSounds()
-----------------------
*/
public void UnMuteAllSounds( bool unmute, bool unmuteReserved = false ) {
for ( int i = 0; i < soundEmitters.Length; i++ ) {
if ( !unmuteReserved && ( i == (int)EmitterChannel.Reserved ) ) {
continue;
}
if ( soundEmitters[i].audioSource.isPlaying ) {
soundEmitters[i].audioSource.mute = false;
}
}
}
/*
-----------------------
GetEmitterEndTime()
-----------------------
*/
static public float GetEmitterEndTime( int idx ) {
return theAudioManager.soundEmitters[idx].endPlayTime;
}
/*
-----------------------
SetEmitterTime()
-----------------------
*/
static public float SetEmitterTime( int idx, float time ) {
return theAudioManager.soundEmitters[idx].time = time;
}
/*
-----------------------
PlaySound()
-----------------------
*/
static public int PlaySound( AudioClip clip, float volume, EmitterChannel src = EmitterChannel.Any, float delay = 0.0f, float pitchVariance = 1.0f, bool loop = false ) {
if ( !SoundEnabled ) {
return -1;
}
return PlaySoundAt( ( staticListenerPosition != null ) ? staticListenerPosition.position : Vector3.zero, clip, volume, src, delay, pitchVariance, loop );
}
/*
-----------------------
FindFreeEmitter()
-----------------------
*/
static private int FindFreeEmitter( EmitterChannel src, SoundPriority priority ) {
// default to the reserved emitter
SoundEmitter next = theAudioManager.soundEmitters[0];
if ( src == EmitterChannel.Any ) {
// pull from the free emitter list if possible
if ( theAudioManager.nextFreeEmitters.size > 0 ) {
// return the first in the list
next = theAudioManager.nextFreeEmitters[0];
// remove it from the free list
theAudioManager.nextFreeEmitters.RemoveAtFast( 0 );
} else {
// no free emitters available so pull from the lowest priority sound
if ( priority == SoundPriority.VeryLow ) {
// skip low priority sounds
return -1;
} else {
// find a playing emitter that has a lower priority than what we're requesting
// TODO - we could first search for Very Low, then Low, etc ... TBD if it's worth the effort
next = theAudioManager.playingEmitters.Find( item => item != null && item.priority < priority );
if ( next == null ) {
// last chance to find a free emitter
if ( priority < SoundPriority.Default ) {
// skip sounds less than the default priority
if ( theAudioManager.verboseLogging ) {
Debug.LogWarning( "[AudioManager] skipping sound " + priority );
}
return -1;
} else {
// grab a default priority emitter so that we don't cannabalize a high priority sound
next = theAudioManager.playingEmitters.Find( item => item != null && item.priority <= SoundPriority.Default ); ;
}
}
if ( next != null ) {
if ( theAudioManager.verboseLogging ) {
Debug.LogWarning( "[AudioManager] cannabalizing " + next.originalIdx + " Time: " + Time.time );
}
// remove it from the playing list
next.Stop();
theAudioManager.playingEmitters.RemoveFast( next );
}
}
}
}
if ( next == null ) {
Debug.LogError( "[AudioManager] ERROR - absolutely couldn't find a free emitter! Priority = " + priority + " TOO MANY PlaySound* calls!" );
showPlayingEmitterCount = true;
return -1;
}
return next.originalIdx;
}
/*
-----------------------
PlaySound()
-----------------------
*/
static public int PlaySound( SoundFX soundFX, EmitterChannel src = EmitterChannel.Any, float delay = 0.0f ) {
if ( !SoundEnabled ) {
return -1;
}
return PlaySoundAt( ( staticListenerPosition != null ) ? staticListenerPosition.position : Vector3.zero, soundFX, src, delay );
}
/*
-----------------------
PlaySoundAt()
-----------------------
*/
static public int PlaySoundAt( Vector3 position, SoundFX soundFX, EmitterChannel src = EmitterChannel.Any, float delay = 0.0f, float volumeOverride = 1.0f, float pitchMultiplier = 1.0f ) {
if ( !SoundEnabled ) {
return -1;
}
AudioClip clip = soundFX.GetClip();
if ( clip == null ) {
return -1;
}
// check the distance from the local player and ignore sounds out of range
if ( staticListenerPosition != null ) {
float distFromListener = ( staticListenerPosition.position - position ).sqrMagnitude;
if ( distFromListener > theAudioManager.audioMaxFallOffDistanceSqr ) {
return -1;
}
if ( distFromListener > soundFX.MaxFalloffDistSquared ) {
return -1;
}
}
// check max playing sounds
if ( soundFX.ReachedGroupPlayLimit() ) {
if ( theAudioManager.verboseLogging ) {
Debug.Log( "[AudioManager] PlaySoundAt() with " + soundFX.name + " skipped due to group play limit" );
}
return -1;
}
int idx = FindFreeEmitter( src, soundFX.priority );
if ( idx == -1 ) {
// no free emitters - should only happen on very low priority sounds
return -1;
}
SoundEmitter emitter = theAudioManager.soundEmitters[idx];
// make sure to detach the emitter from a previous parent
emitter.ResetParent( soundEmitterParent.transform );
emitter.gameObject.SetActive( true );
// set up the sound emitter
AudioSource audioSource = emitter.audioSource;
ONSPAudioSource osp = emitter.osp;
audioSource.enabled = true;
audioSource.volume = Mathf.Clamp01( Mathf.Clamp01( theAudioManager.volumeSoundFX * soundFX.volume ) * volumeOverride * soundFX.GroupVolumeOverride );
audioSource.pitch = soundFX.GetPitch() * pitchMultiplier;
audioSource.time = 0.0f;
audioSource.spatialBlend = 1.0f;
audioSource.rolloffMode = soundFX.falloffCurve;
if ( soundFX.falloffCurve == AudioRolloffMode.Custom ) {
audioSource.SetCustomCurve( AudioSourceCurveType.CustomRolloff, soundFX.volumeFalloffCurve );
}
audioSource.SetCustomCurve( AudioSourceCurveType.ReverbZoneMix, soundFX.reverbZoneMix );
audioSource.dopplerLevel = 0;
audioSource.clip = clip;
audioSource.spread = soundFX.spread;
audioSource.loop = soundFX.looping;
audioSource.mute = false;
audioSource.minDistance = soundFX.falloffDistance.x;
audioSource.maxDistance = soundFX.falloffDistance.y;
audioSource.outputAudioMixerGroup = soundFX.GetMixerGroup( AudioManager.EmitterGroup );
// set the play time so we can check when sounds are done
emitter.endPlayTime = Time.time + clip.length + delay;
// cache the default volume for fading
emitter.defaultVolume = audioSource.volume;
// sound priority
emitter.priority = soundFX.priority;
// reset this
emitter.onFinished = null;
// update the sound group limits
emitter.SetPlayingSoundGroup( soundFX.Group );
// add to the playing list
if ( src == EmitterChannel.Any ) {
theAudioManager.playingEmitters.AddUnique( emitter );
}
// OSP properties
if ( osp != null ) {
osp.EnableSpatialization = soundFX.ospProps.enableSpatialization;
osp.EnableRfl = theAudioManager.enableSpatializedFastOverride || soundFX.ospProps.useFastOverride ? true : false;
osp.Gain = soundFX.ospProps.gain;
osp.UseInvSqr = soundFX.ospProps.enableInvSquare;
osp.Near = soundFX.ospProps.invSquareFalloff.x;
osp.Far = soundFX.ospProps.invSquareFalloff.y;
audioSource.spatialBlend = (soundFX.ospProps.enableSpatialization) ? 1.0f : 0.8f;
// make sure to set the properties in the audio source before playing
osp.SetParameters(ref audioSource);
}
audioSource.transform.position = position;
if ( theAudioManager.verboseLogging ) {
Debug.Log( "[AudioManager] PlaySoundAt() channel = " + idx + " soundFX = " + soundFX.name + " volume = " + emitter.volume + " Delay = " + delay + " time = " + Time.time + "\n" );
}
// play the sound
if ( delay > 0f ) {
audioSource.PlayDelayed( delay );
} else {
audioSource.Play();
}
return idx;
}
/*
-----------------------
PlayRandomSoundAt()
-----------------------
*/
static public int PlayRandomSoundAt( Vector3 position, AudioClip[] clips, float volume, EmitterChannel src = EmitterChannel.Any, float delay = 0.0f, float pitch = 1.0f, bool loop = false ) {
if ( ( clips == null ) || ( clips.Length == 0 ) ) {
return -1;
}
int idx = Random.Range( 0, clips.Length );
return PlaySoundAt( position, clips[idx], volume, src, delay, pitch, loop );
}
/*
-----------------------
PlaySoundAt()
-----------------------
*/
static public int PlaySoundAt( Vector3 position, AudioClip clip, float volume = 1.0f, EmitterChannel src = EmitterChannel.Any, float delay = 0.0f, float pitch = 1.0f, bool loop = false ) {
if ( !SoundEnabled ) {
return -1;
}
if ( clip == null ) {
return -1;
}
// check the distance from the local player and ignore sounds out of range
if ( staticListenerPosition != null ) {
if ( ( staticListenerPosition.position - position ).sqrMagnitude > theAudioManager.audioMaxFallOffDistanceSqr ) {
// no chance of being heard
return -1;
}
}
int idx = FindFreeEmitter( src, 0 );
if ( idx == -1 ) {
// no free emitters - should only happen on very low priority sounds
return -1;
}
SoundEmitter emitter = theAudioManager.soundEmitters[idx];
// make sure to detach the emitter from a previous parent
emitter.ResetParent( soundEmitterParent.transform );
emitter.gameObject.SetActive( true );
// set up the sound emitter
AudioSource audioSource = emitter.audioSource;
ONSPAudioSource osp = emitter.osp;
audioSource.enabled = true;
audioSource.volume = Mathf.Clamp01( theAudioManager.volumeSoundFX * volume );
audioSource.pitch = pitch;
audioSource.spatialBlend = 0.8f;
audioSource.rolloffMode = AudioRolloffMode.Linear;
audioSource.SetCustomCurve( AudioSourceCurveType.ReverbZoneMix, defaultReverbZoneMix );
audioSource.dopplerLevel = 0.0f;
audioSource.clip = clip;
audioSource.spread = 0.0f;
audioSource.loop = loop;
audioSource.mute = false;
audioSource.minDistance = theAudioManager.audioMinFallOffDistance;
audioSource.maxDistance = theAudioManager.audioMaxFallOffDistance;
audioSource.outputAudioMixerGroup = AudioManager.EmitterGroup;
// set the play time so we can check when sounds are done
emitter.endPlayTime = Time.time + clip.length + delay;
// cache the default volume for fading
emitter.defaultVolume = audioSource.volume;
// default priority
emitter.priority = 0;
// reset this
emitter.onFinished = null;
// update the sound group limits
emitter.SetPlayingSoundGroup( null );
// add to the playing list
if ( src == EmitterChannel.Any ) {
theAudioManager.playingEmitters.AddUnique( emitter );
}
// disable spatialization (by default for regular AudioClips)
if ( osp != null ) {
osp.EnableSpatialization = false;
}
audioSource.transform.position = position;
if ( theAudioManager.verboseLogging ) {
Debug.Log( "[AudioManager] PlaySoundAt() channel = " + idx + " clip = " + clip.name + " volume = " + emitter.volume + " Delay = " + delay + " time = " + Time.time + "\n" );
}
// play the sound
if ( delay > 0f ) {
audioSource.PlayDelayed( delay );
} else {
audioSource.Play();
}
return idx;
}
/*
-----------------------
SetOnFinished()
-----------------------
*/
public static void SetOnFinished( int emitterIdx, System.Action onFinished ) {
if ( ValidateEmitterIndex(emitterIdx) ) {
theAudioManager.soundEmitters[emitterIdx].SetOnFinished( onFinished );
}
}
/*
-----------------------
SetOnFinished()
-----------------------
*/
public static void SetOnFinished( int emitterIdx, System.Action<object> onFinished, object obj ) {
if ( ValidateEmitterIndex(emitterIdx) ) {
theAudioManager.soundEmitters[emitterIdx].SetOnFinished( onFinished, obj );
}
}
/*
-----------------------
AttachSoundToParent()
-----------------------
*/
public static void AttachSoundToParent( int idx, Transform parent ) {
if ( theAudioManager.verboseLogging ) {
string parentName = parent.name;
if ( parent.parent != null ) {
parentName = parent.parent.name + "/" + parentName;
}
Debug.Log( "[AudioManager] ATTACHING INDEX " + idx + " to " + parentName );
}
theAudioManager.soundEmitters[idx].ParentTo( parent );
}
/*
-----------------------
DetachSoundFromParent()
-----------------------
*/
public static void DetachSoundFromParent( int idx ) {
if ( theAudioManager.verboseLogging ) {
Debug.Log( "[AudioManager] DETACHING INDEX " + idx );
}
theAudioManager.soundEmitters[idx].DetachFromParent();
}
/*
-----------------------
DetachSoundsFromParent()
-----------------------
*/
public static void DetachSoundsFromParent( SoundEmitter[] emitters, bool stopSounds = true ) {
if ( emitters == null ) {
return;
}
foreach ( SoundEmitter emitter in emitters ) {
if ( emitter.defaultParent != null ) {
if ( stopSounds ) {
emitter.Stop();
}
emitter.DetachFromParent();
// make sure it's active
emitter.gameObject.SetActive( true );
} else {
if ( stopSounds ) {
emitter.Stop();
}
}
}
}
/*
-----------------------
SetEmitterMixerGroup()
-----------------------
*/
public static void SetEmitterMixerGroup( int idx, AudioMixerGroup mixerGroup ) {
if ( ( theAudioManager != null ) && ( idx > -1 ) ) {
theAudioManager.soundEmitters[idx].SetAudioMixer( mixerGroup );
}
}
/*
-----------------------
GetActiveSnapshot()
-----------------------
*/
public static MixerSnapshot GetActiveSnapshot() {
return ( theAudioManager != null ) ? theAudioManager.currentSnapshot : null;
}
/*
-----------------------
SetCurrentSnapshot()
-----------------------
*/
public static void SetCurrentSnapshot( MixerSnapshot mixerSnapshot ) {
#if UNITY_EDITOR
if ( mixerSnapshot == null || mixerSnapshot.snapshot == null ) {
Debug.LogError( "[AudioManager] ERROR setting empty mixer snapshot!" );
} else {
Debug.Log( "[AudioManager] Setting audio mixer snapshot: " + ( ( mixerSnapshot != null && mixerSnapshot.snapshot != null ) ? mixerSnapshot.snapshot.name : "None" ) + " Time: " + Time.time );
}
#endif
if ( theAudioManager != null ) {
if ( ( mixerSnapshot != null ) && ( mixerSnapshot.snapshot != null ) ) {
mixerSnapshot.snapshot.TransitionTo( mixerSnapshot.transitionTime );
} else {
mixerSnapshot = null;
}
theAudioManager.currentSnapshot = mixerSnapshot;
}
}
/*
-----------------------
BlendWithCurrentSnapshot()
-----------------------
*/
public static void BlendWithCurrentSnapshot( MixerSnapshot blendSnapshot, float weight, float blendTime = 0.0f ) {
if ( theAudioManager != null ) {
if ( theAudioManager.audioMixer == null ) {
Debug.LogWarning( "[AudioManager] can't call BlendWithCurrentSnapshot if the audio mixer is not set!" );
return;
}
if ( blendTime == 0.0f ) {
blendTime = Time.deltaTime;
}
if ( ( theAudioManager.currentSnapshot != null ) && (theAudioManager.currentSnapshot.snapshot != null ) ) {
if ( ( blendSnapshot != null ) && ( blendSnapshot.snapshot != null ) ) {
weight = Mathf.Clamp01( weight );
if ( weight == 0.0f ) {
// revert to the default snapshot
theAudioManager.currentSnapshot.snapshot.TransitionTo( blendTime );
} else {
AudioMixerSnapshot[] snapshots = new AudioMixerSnapshot[] { theAudioManager.currentSnapshot.snapshot, blendSnapshot.snapshot };
float[] weights = new float[] { 1.0f - weight, weight };
theAudioManager.audioMixer.TransitionToSnapshots( snapshots, weights, blendTime );
}
}
}
}
}
}
} // namespace OVR
