public static void Update()
{
if (system == null)
{
return;
}
// Update sound
if (channel != null)
{
FMOD.MODE mode = FMOD.MODE.DEFAULT;
channel.getMode(ref mode);
if ((mode & FMOD.MODE._3D) == FMOD.MODE._3D)
{
FMOD.VECTOR pos; pos.x = 0.0f; pos.y = 0.0f; pos.z = 0.0f;
FMOD.VECTOR vel; vel.x = 0.0f; vel.y = 0.0f; vel.z = 0.0f;
channel.get3DAttributes(ref pos, ref vel);
float distance = (float)Math.Sqrt((double)(pos.x * pos.x + pos.y * pos.y));
float minDist = 0.0f, maxDist = 1000.0f;
channel.get3DMinMaxDistance(ref minDist, ref maxDist);
float distRatio = distance / maxDist;
if (ignorefod == false)
{
// Set direct and reverb occlusion
float direct = 1.0f - GetDistanceRatioValue(CONTROLTYPE.DIRECT, distRatio);
float reverb = 1.0f - GetDistanceRatioValue(CONTROLTYPE.REVERB, distRatio);
channel.set3DOcclusion(direct, reverb);
// Set lowpass
FMOD.DSP head = null;
channel.getDSPHead(ref head);
if (head != null)
{
int inputs = 0;
head.getNumInputs(ref inputs);
for (int i = 0; i < inputs; i++)
{
FMOD.DSP dsp = null;
FMOD.DSPConnection dspcon = null;
head.getInput(i, ref dsp, ref dspcon);
if (dsp == null)
{
continue;
}
FMOD.DSP_TYPE type = FMOD.DSP_TYPE.UNKNOWN;
dsp.getType(ref type);
if (type == FMOD.DSP_TYPE.LOWPASS_SIMPLE)
{
float hrtf = 1.0f;
FMOD.VECTOR dir;
dir.x = pos.x;
dir.y = pos.y;
dir.z = 0.0f;
float length = (float)Math.Sqrt((double)(dir.x * dir.x + dir.y * dir.y));
if (length > 0.0001f)
{
length = 1.0f / length;
dir.x *= length;
dir.y *= length;
float _angle = (float)Math.Acos((double)dir.y);
hrtf = 1.0f - HRTFDATA.Scale * Math.Min(1.0f, Math.Max(0.0f, (_angle - HRTFDATA.MinAngle) / (HRTFDATA.MaxAngle - HRTFDATA.MinAngle)));
}
float lowpass = 21990.0f * GetDistanceRatioValue(CONTROLTYPE.LOWPASS, distRatio) * hrtf + 10.0f;
dsp.setParameter((int)FMOD.DSP_LOWPASS_SIMPLE.CUTOFF, lowpass);
break;
}
}
}
// Set pan level
float panlevel = GetDistanceRatioValue(CONTROLTYPE.PANLEVEL, distRatio);
channel.set3DPanLevel(panlevel);
}
else
{
channel.set3DPanLevel(0.0f);
}
}
}
system.update();
}
private void Form1_Load(object sender, System.EventArgs e)
{
uint version = 0;
FMOD.RESULT result;
FMOD.DSPConnection dspconnectiontemp = null;
/*
* Create a System object and initialize.
*/
result = FMOD.Factory.System_Create(ref system);
ERRCHECK(result);
result = system.getVersion(ref version);
ERRCHECK(result);
if (version < FMOD.VERSION.number)
{
MessageBox.Show("Error! You are using an old version of FMOD " + version.ToString("X") + ". This program requires " + FMOD.VERSION.number.ToString("X") + ".");
Application.Exit();
}
result = system.init(32, FMOD.INITFLAGS.NORMAL, (IntPtr)null);
ERRCHECK(result);
result = system.createSound("../../../../../examples/media/drumloop.wav", FMOD.MODE.SOFTWARE | FMOD.MODE.LOOP_NORMAL, ref sound);
ERRCHECK(result);
result = system.playSound(FMOD.CHANNELINDEX.FREE, sound, false, ref channel);
ERRCHECK(result);
/*
* Create the DSP effects.
*/
result = system.createDSPByType(FMOD.DSP_TYPE.LOWPASS, ref dsplowpass);
ERRCHECK(result);
result = system.createDSPByType(FMOD.DSP_TYPE.CHORUS, ref dspchorus);
ERRCHECK(result);
/*
* Connect up the DSP network
*/
/*
* When a sound is played, a subnetwork is set up in the DSP network which looks like this.
* Wavetable is the drumloop sound, and it feeds its data from right to left.
*
* [DSPHEAD]<------------[DSPCHANNELMIXER]
*/
result = system.getDSPHead(ref dsphead);
ERRCHECK(result);
result = dsphead.getInput(0, ref dspchannelmixer, ref dspconnectiontemp);
ERRCHECK(result);
/*
* Now disconnect channeldsp head from wavetable to look like this.
*
* [DSPHEAD] [DSPCHANNELMIXER]
*/
result = dsphead.disconnectFrom(dspchannelmixer);
ERRCHECK(result);
/*
* Now connect the 2 effects to channeldsp head.
*
* [DSPLOWPASS]
* /
* [DSPHEAD] [DSPCHANNELMIXER]
\
\ [DSPCHORUS]
*/
result = dsphead.addInput(dsplowpass, ref dsplowpassconnection);
ERRCHECK(result);
result = dsphead.addInput(dspchorus, ref dspchorusconnection);
ERRCHECK(result);
/*
* Now connect the wavetable to the 2 effects
*
* [DSPLOWPASS]
* / \
* [DSPHEAD] [DSPCHANNELMIXER]
\ /
\ [DSPCHORUS]
*/
result = dsplowpass.addInput(dspchannelmixer, ref dspconnectiontemp);
ERRCHECK(result);
result = dspchorus.addInput(dspchannelmixer, ref dspconnectiontemp);
ERRCHECK(result);
/*
* Now the drumloop will be twice as loud, because it is being split into 2, then recombined at the end.
* What we really want is to only feed the dspchannelmixer->dsplowpass through the left speaker, and
* dspchannelmixer->dspchorus to the right speaker.
* We can do that simply by setting the pan, or speaker levels of the connections.
*
* [DSPLOWPASS]
* /1,0 \
* [DSPHEAD] [DSPCHANNELMIXER]
\0,1 /
* [DSPCHORUS]
*/
{
float[] leftinputon = { 1.0f, 0.0f };
float[] rightinputon = { 0.0f, 1.0f };
float[] inputsoff = { 0.0f, 0.0f };
result = dsplowpassconnection.setLevels(FMOD.SPEAKER.FRONT_LEFT, leftinputon, 2);
ERRCHECK(result);
result = dsplowpassconnection.setLevels(FMOD.SPEAKER.FRONT_RIGHT, inputsoff, 2);
ERRCHECK(result);
result = dsplowpassconnection.setLevels(FMOD.SPEAKER.FRONT_LEFT, inputsoff, 2);
ERRCHECK(result);
result = dsplowpassconnection.setLevels(FMOD.SPEAKER.FRONT_RIGHT, rightinputon, 2);
ERRCHECK(result);
}
result = dsplowpass.setBypass(true);
result = dspchorus.setBypass(true);
result = dsplowpass.setActive(true);
result = dspchorus.setActive(true);
}