internal bool INTERNAL_update()
{
// If we're not running, save some instructions...
if (!INTERNAL_timer.IsRunning)
{
return(true);
}
elapsedFrames += 1;
// User control updates
if (INTERNAL_data.IsUserControlled)
{
string varName = INTERNAL_data.UserControlVariable;
if (INTERNAL_userControlledPlaying &&
(INTERNAL_baseEngine.INTERNAL_isGlobalVariable(varName) ?
!MathHelper.WithinEpsilon(INTERNAL_controlledValue, INTERNAL_baseEngine.GetGlobalVariable(varName)) :
!MathHelper.WithinEpsilon(INTERNAL_controlledValue, GetVariable(INTERNAL_data.UserControlVariable))))
{
// TODO: Crossfading
foreach (SoundEffectInstance sfi in INTERNAL_instancePool)
{
sfi.Stop();
sfi.Dispose();
}
INTERNAL_instancePool.Clear();
INTERNAL_instanceVolumes.Clear();
INTERNAL_instancePitches.Clear();
INTERNAL_rpcTrackVolumes.Clear();
INTERNAL_rpcTrackPitches.Clear();
if (!INTERNAL_calculateNextSound())
{
// Nothing to play, bail.
return(true);
}
INTERNAL_activeSound.InitializeClips();
INTERNAL_timer.Stop();
INTERNAL_timer.Reset();
INTERNAL_timer.Start();
}
if (INTERNAL_activeSound == null)
{
return(INTERNAL_userControlledPlaying);
}
}
// Trigger events for each track
foreach (XACTClipInstance clip in INTERNAL_activeSound.Clips)
{
// Play events when the timestamp has been hit.
for (int i = 0; i < clip.Events.Count; i += 1)
{
EventInstance evt = clip.Events[i];
if (!evt.Played &&
INTERNAL_timer.ElapsedMilliseconds > evt.Timestamp)
{
evt.Apply(
this,
null,
INTERNAL_timer.ElapsedMilliseconds / 1000.0f
);
}
}
}
// Clear out sound effect instances as they finish
for (int i = 0; i < INTERNAL_instancePool.Count; i += 1)
{
if (INTERNAL_instancePool[i].State == SoundState.Stopped)
{
// Get the event that spawned this instance...
PlayWaveEventInstance evtInstance =
INTERNAL_playWaveEventBySound[INTERNAL_instancePool[i]];
double prevVolume = INTERNAL_instanceVolumes[i];
short prevPitch = INTERNAL_instancePitches[i];
// Then delete all the guff
INTERNAL_playWaveEventBySound.Remove(INTERNAL_instancePool[i]);
INTERNAL_instancePool[i].Dispose();
INTERNAL_instancePool.RemoveAt(i);
INTERNAL_instanceVolumes.RemoveAt(i);
INTERNAL_instancePitches.RemoveAt(i);
INTERNAL_rpcTrackVolumes.RemoveAt(i);
INTERNAL_rpcTrackPitches.RemoveAt(i);
// Increment the loop counter, try to get another loop
evtInstance.LoopCount += 1;
PlayWave(evtInstance, prevVolume, prevPitch);
// Removed a wave, have to step back...
i -= 1;
}
}
// Fade in/out
float fadePerc = 1.0f;
if (INTERNAL_fadeMode != FadeMode.None)
{
if (INTERNAL_fadeMode == FadeMode.FadeOut)
{
if (INTERNAL_category.crossfadeType == CrossfadeType.Linear)
{
fadePerc = (
INTERNAL_fadeEnd -
(
INTERNAL_timer.ElapsedMilliseconds -
INTERNAL_fadeStart
)
) / (float)INTERNAL_fadeEnd;
}
else
{
throw new NotImplementedException("Unhandled CrossfadeType!");
}
if (fadePerc <= 0.0f)
{
Stop(AudioStopOptions.Immediate);
INTERNAL_fadeMode = FadeMode.None;
return(false);
}
}
else if (INTERNAL_fadeMode == FadeMode.FadeIn)
{
if (INTERNAL_category.crossfadeType == CrossfadeType.Linear)
{
fadePerc = INTERNAL_timer.ElapsedMilliseconds / (float)INTERNAL_fadeEnd;
}
else
{
throw new NotImplementedException("Unhandled CrossfadeType!");
}
if (fadePerc > 1.0f)
{
fadePerc = 1.0f;
INTERNAL_fadeMode = FadeMode.None;
}
}
else if (INTERNAL_fadeMode == FadeMode.ReleaseRpc)
{
float releasePerc = (
INTERNAL_timer.ElapsedMilliseconds -
INTERNAL_fadeStart
) / (float)INTERNAL_maxRpcReleaseTime;
if (releasePerc > 1.0f)
{
Stop(AudioStopOptions.Immediate);
INTERNAL_fadeMode = FadeMode.None;
return(false);
}
}
else
{
throw new NotImplementedException("Unsupported FadeMode!");
}
}
// If everything has been played and finished, we're done here.
if (INTERNAL_instancePool.Count == 0)
{
bool allPlayed = true;
foreach (XACTClipInstance clipInstance in INTERNAL_activeSound.Clips)
{
foreach (EventInstance evt in clipInstance.Events)
{
if (!evt.Played)
{
allPlayed = false;
break;
}
}
}
if (allPlayed)
{
// If this is managed, we're done completely.
if (INTERNAL_isManaged)
{
Dispose();
}
else
{
KillCue();
}
if (INTERNAL_userControlledPlaying)
{
// We're "still" "playing" right now...
return(true);
}
IsStopped = true;
return(false);
}
}
// RPC updates
float rpcVolume = 0.0f;
float rpcPitch = 0.0f;
float hfGain = 1.0f;
float lfGain = 1.0f;
for (int i = 0; i < INTERNAL_activeSound.Sound.RPCCodes.Count; i += 1)
{
// Are we processing an RPC targeting the sound itself rather than a track?
bool isSoundRpc = i == 0 && INTERNAL_activeSound.Sound.HasSoundRpcs;
// If there is an RPC targeting the sound instance itself, it is handled in rpcVolume/rpcPitch, and the first track is at i-1.
int trackRpcIndex = INTERNAL_activeSound.Sound.HasSoundRpcs ? i - 1 : i;
// If this RPC Code is for a track that is not active yet, we have nothing to do.
if (trackRpcIndex >= INTERNAL_instancePool.Count)
{
// FIXME: This presumes that tracks start in order, which doesn't have to be true.
break;
}
if (!isSoundRpc)
{
INTERNAL_rpcTrackVolumes[trackRpcIndex] = 0.0f;
INTERNAL_rpcTrackPitches[trackRpcIndex] = 0.0f;
}
foreach (uint curCode in INTERNAL_activeSound.Sound.RPCCodes[i])
{
RPC curRPC = INTERNAL_baseEngine.INTERNAL_getRPC(curCode);
float result;
if (!INTERNAL_baseEngine.INTERNAL_isGlobalVariable(curRPC.Variable))
{
float variableValue;
if (curRPC.Variable.Equals("AttackTime"))
{
PlayWaveEvent playWaveEvent =
(PlayWaveEvent)INTERNAL_activeSound.Sound.INTERNAL_clips[trackRpcIndex].Events[0];
long elapsedFromPlay = INTERNAL_timer.ElapsedMilliseconds
- playWaveEvent.Timestamp;
variableValue = elapsedFromPlay;
}
else if (curRPC.Variable.Equals("ReleaseTime"))
{
if (INTERNAL_fadeMode == FadeMode.ReleaseRpc)
{
long elapsedFromStop = INTERNAL_timer.ElapsedMilliseconds - INTERNAL_fadeStart;
variableValue = elapsedFromStop;
}
else
{
variableValue = 0.0f;
}
}
else
{
variableValue = GetVariable(curRPC.Variable);
}
result = curRPC.CalculateRPC(variableValue);
}
else
{
// It's a global variable we're looking for!
result = curRPC.CalculateRPC(
INTERNAL_baseEngine.GetGlobalVariable(
curRPC.Variable
)
);
}
if (curRPC.Parameter == RPCParameter.Volume)
{
// If this RPC targets the sound instance itself then apply to the dedicated variable.
if (isSoundRpc)
{
rpcVolume += result;
}
else
{
INTERNAL_rpcTrackVolumes[trackRpcIndex] += result;
}
}
else if (curRPC.Parameter == RPCParameter.Pitch)
{
float pitch = result;
if (isSoundRpc)
{
rpcPitch += pitch;
}
else
{
INTERNAL_rpcTrackPitches[trackRpcIndex] += pitch;
}
}
else if (curRPC.Parameter == RPCParameter.FilterFrequency)
{
// FIXME: Just listening to the last RPC!
float hf = result / 20000.0f;
float lf = 1.0f - hf;
if (isSoundRpc)
{
hfGain = hf;
lfGain = lf;
}
else
{
throw new NotImplementedException("Per-track filter RPCs!");
}
}
else
{
throw new NotImplementedException(
"RPC Parameter Type: " + curRPC.Parameter.ToString()
);
}
}
}
// Sound effect instance updates
for (int i = 0; i < INTERNAL_instancePool.Count; i += 1)
{
/* The final volume should be the combination of the
* authored volume, category volume, RPC sound/track
* volumes, event volumes, and fade.
*/
INTERNAL_instancePool[i].Volume = XACTCalculator.CalculateAmplitudeRatio(
INTERNAL_instanceVolumes[i] +
rpcVolume +
INTERNAL_rpcTrackVolumes[i] +
eventVolume
) * INTERNAL_category.INTERNAL_volume.Value * fadePerc;
/* The final pitch should be the combination of the
* authored pitch, RPC sound/track pitches, and event
* pitch.
*
* XACT uses -1200 to 1200 (+/- 12 semitones),
* XNA uses -1.0f to 1.0f (+/- 1 octave).
*/
INTERNAL_instancePool[i].Pitch = (
INTERNAL_instancePitches[i] +
rpcPitch +
INTERNAL_rpcTrackPitches[i] +
eventPitch
) / 1200.0f;
/* The final filter is determined by the instance's filter type,
* in addition to our calculation of the HF/LF gain values.
*/
byte fType = INTERNAL_instancePool[i].FilterType;
if (fType == 0xFF)
{
// No-op, no filter!
}
else if (fType == 0)
{
INTERNAL_instancePool[i].INTERNAL_applyLowPassFilter(hfGain);
}
else if (fType == 1)
{
INTERNAL_instancePool[i].INTERNAL_applyHighPassFilter(lfGain);
}
else if (fType == 2)
{
INTERNAL_instancePool[i].INTERNAL_applyBandPassFilter(hfGain, lfGain);
}
else
{
throw new InvalidOperationException("Unhandled filter type!");
}
// Update 3D position, if applicable
if (INTERNAL_isPositional)
{
INTERNAL_instancePool[i].Apply3D(
INTERNAL_listener,
INTERNAL_emitter
);
}
}
return(true);
}