void DSOUND_Calc3DBuffer(IDirectSoundBufferImpl *dsb)
{
/* volume, at which the sound will be played after all calcs. */
D3DVALUE lVolume = 0;
/* stuff for distance related stuff calc. */
D3DVECTOR vDistance;
D3DVALUE flDistance = 0;
/* panning related stuff */
D3DVALUE flAngle, flAngle2;
D3DVECTOR vLeft;
int i, num_main_speakers;
float a, ingain;
/* doppler shift related stuff */
TRACE("(%p)\n",dsb);
/* initial buffer volume */
lVolume = dsb->ds3db_lVolume;
switch (dsb->ds3db_ds3db.dwMode)
{
case DS3DMODE_DISABLE:
TRACE("3D processing disabled\n");
/* this one is here only to eliminate annoying warning message */
DSOUND_RecalcVolPan (&dsb->volpan);
return;
case DS3DMODE_NORMAL:
TRACE("Normal 3D processing mode\n");
/* we need to calculate distance between buffer and listener*/
vDistance = VectorBetweenTwoPoints(&dsb->device->ds3dl.vPosition, &dsb->ds3db_ds3db.vPosition);
flDistance = VectorMagnitude (&vDistance);
break;
case DS3DMODE_HEADRELATIVE:
TRACE("Head-relative 3D processing mode\n");
/* distance between buffer and listener is same as buffer's position */
vDistance = dsb->ds3db_ds3db.vPosition;
flDistance = VectorMagnitude (&vDistance);
break;
}
if (flDistance > dsb->ds3db_ds3db.flMaxDistance)
{
/* some apps don't want you to hear too distant sounds... */
if (dsb->dsbd.dwFlags & DSBCAPS_MUTE3DATMAXDISTANCE)
{
dsb->volpan.lVolume = DSBVOLUME_MIN;
DSOUND_RecalcVolPan (&dsb->volpan);
/* i guess mixing here would be a waste of power */
return;
}
else
flDistance = dsb->ds3db_ds3db.flMaxDistance;
}
if (flDistance < dsb->ds3db_ds3db.flMinDistance)
flDistance = dsb->ds3db_ds3db.flMinDistance;
/* attenuation proportional to the distance squared, converted to millibels as in lVolume*/
lVolume -= log10(flDistance/dsb->ds3db_ds3db.flMinDistance * flDistance/dsb->ds3db_ds3db.flMinDistance)*1000 * dsb->device->ds3dl.flRolloffFactor;
TRACE("dist. att: Distance = %f, MinDistance = %f => adjusting volume %d to %f\n", flDistance, dsb->ds3db_ds3db.flMinDistance, dsb->ds3db_lVolume, lVolume);
/* conning */
/* sometimes it happens that vConeOrientation vector = (0,0,0); in this case angle is "nan" and it's useless*/
if (dsb->ds3db_ds3db.vConeOrientation.x == 0 && dsb->ds3db_ds3db.vConeOrientation.y == 0 && dsb->ds3db_ds3db.vConeOrientation.z == 0)
{
TRACE("conning: cones not set\n");
}
else
{
D3DVECTOR vDistanceInv;
vDistanceInv.x = -vDistance.x;
vDistanceInv.y = -vDistance.y;
vDistanceInv.z = -vDistance.z;
/* calculate angle */
flAngle = AngleBetweenVectorsDeg(&dsb->ds3db_ds3db.vConeOrientation, &vDistanceInv);
/* if by any chance it happens that OutsideConeAngle = InsideConeAngle (that means that conning has no effect) */
if (dsb->ds3db_ds3db.dwInsideConeAngle != dsb->ds3db_ds3db.dwOutsideConeAngle)
{
/* my test show that for my way of calc., we need only half of angles */
DWORD dwInsideConeAngle = dsb->ds3db_ds3db.dwInsideConeAngle/2;
DWORD dwOutsideConeAngle = dsb->ds3db_ds3db.dwOutsideConeAngle/2;
if (dwOutsideConeAngle == dwInsideConeAngle)
++dwOutsideConeAngle;
/* full volume */
if (flAngle < dwInsideConeAngle)
flAngle = dwInsideConeAngle;
/* min (app defined) volume */
if (flAngle > dwOutsideConeAngle)
flAngle = dwOutsideConeAngle;
/* this probably isn't the right thing, but it's ok for the time being */
lVolume += ((flAngle - dwInsideConeAngle)/(dwOutsideConeAngle - dwInsideConeAngle)) * dsb->ds3db_ds3db.lConeOutsideVolume;
}
TRACE("conning: Angle = %f deg; InsideConeAngle(/2) = %d deg; OutsideConeAngle(/2) = %d deg; ConeOutsideVolume = %d => adjusting volume to %f\n",
flAngle, dsb->ds3db_ds3db.dwInsideConeAngle/2, dsb->ds3db_ds3db.dwOutsideConeAngle/2, dsb->ds3db_ds3db.lConeOutsideVolume, lVolume);
}
dsb->volpan.lVolume = lVolume;
ingain = pow(2.0, dsb->volpan.lVolume / 600.0) * 0xffff;
if (dsb->device->pwfx->nChannels == 1)
{
dsb->volpan.dwTotalAmpFactor[0] = ingain;
return;
}
/* panning */
if (vDistance.x == 0.0f && vDistance.y == 0.0f && vDistance.z == 0.0f)
flAngle = 0.0;
else
{
vLeft = VectorProduct(&dsb->device->ds3dl.vOrientFront, &dsb->device->ds3dl.vOrientTop);
/* To calculate angle to sound source we need to:
* 1) Get angle between vDistance and a plane on which angle to sound source should be 0.
* Such a plane is given by vectors vOrientFront and vOrientTop, and angle between vector
* and a plane equals to M_PI_2 - angle between vector and normal to this plane (vLeft in this case).
* 2) Determine if the source is behind or in front of us by calculating angle between vDistance
* and vOrientFront.
*/
flAngle = AngleBetweenVectorsRad(&vLeft, &vDistance);
flAngle2 = AngleBetweenVectorsRad(&dsb->device->ds3dl.vOrientFront, &vDistance);
if (flAngle2 > M_PI_2)
flAngle = -flAngle;
flAngle -= M_PI_2;
if (flAngle < -M_PI)
flAngle += 2*M_PI;
}
TRACE("panning: Angle = %f rad, lPan = %d\n", flAngle, dsb->volpan.lPan);
/* FIXME: Doppler Effect disabled since i have no idea which frequency to change and how to do it */
if(0)
{
D3DVALUE flFreq, flBufferVel, flListenerVel;
/* doppler shift*/
if (!VectorMagnitude(&dsb->ds3db_ds3db.vVelocity) && !VectorMagnitude(&dsb->device->ds3dl.vVelocity))
{
TRACE("doppler: Buffer and Listener don't have velocities\n");
}
else if (!(dsb->ds3db_ds3db.vVelocity.x == dsb->device->ds3dl.vVelocity.x &&
dsb->ds3db_ds3db.vVelocity.y == dsb->device->ds3dl.vVelocity.y &&
dsb->ds3db_ds3db.vVelocity.z == dsb->device->ds3dl.vVelocity.z))
{
/* calculate length of ds3db_ds3db.vVelocity component which causes Doppler Effect
NOTE: if buffer moves TOWARDS the listener, it's velocity component is NEGATIVE
if buffer moves AWAY from listener, it's velocity component is POSITIVE */
flBufferVel = ProjectVector(&dsb->ds3db_ds3db.vVelocity, &vDistance);
/* calculate length of ds3dl.vVelocity component which causes Doppler Effect
NOTE: if listener moves TOWARDS the buffer, it's velocity component is POSITIVE
if listener moves AWAY from buffer, it's velocity component is NEGATIVE */
flListenerVel = ProjectVector(&dsb->device->ds3dl.vVelocity, &vDistance);
/* formula taken from Gianicoli D.: Physics, 4th edition: */
/* FIXME: replace dsb->freq with appropriate frequency ! */
flFreq = dsb->freq * ((DEFAULT_VELOCITY + flListenerVel)/(DEFAULT_VELOCITY + flBufferVel));
TRACE("doppler: Buffer velocity (component) = %f, Listener velocity (component) = %f => Doppler shift: %d Hz -> %f Hz\n",
flBufferVel, flListenerVel, dsb->freq, flFreq);
/* FIXME: replace following line with correct frequency setting ! */
dsb->freq = flFreq;
DSOUND_RecalcFormat(dsb);
}
}
for (i = 0; i < dsb->device->pwfx->nChannels; i++)
dsb->volpan.dwTotalAmpFactor[i] = 0;
num_main_speakers = dsb->device->pwfx->nChannels;
if (dsb->device->lfe_channel != -1) {
dsb->volpan.dwTotalAmpFactor[dsb->device->lfe_channel] = ingain;
num_main_speakers--;
}
/* adapted from OpenAL's Alc/panning.c */
for (i = 0; i < num_main_speakers - 1; i++)
{
if(flAngle >= dsb->device->speaker_angles[i] && flAngle < dsb->device->speaker_angles[i+1])
{
/* Sound is between speakers i and i+1 */
a = (flAngle-dsb->device->speaker_angles[i]) / (dsb->device->speaker_angles[i+1]-dsb->device->speaker_angles[i]);
dsb->volpan.dwTotalAmpFactor[dsb->device->speaker_num[i]] = sqrtf(1.0f-a) * ingain;
dsb->volpan.dwTotalAmpFactor[dsb->device->speaker_num[i+1]] = sqrtf(a) * ingain;
return;
}
}
/* Sound is between last and first speakers */
if (flAngle < dsb->device->speaker_angles[0]) { flAngle += M_PI*2.0f; }
a = (flAngle-dsb->device->speaker_angles[i]) / (M_PI*2.0f + dsb->device->speaker_angles[0]-dsb->device->speaker_angles[i]);
dsb->volpan.dwTotalAmpFactor[dsb->device->speaker_num[i]] = sqrtf(1.0f-a) * ingain;
dsb->volpan.dwTotalAmpFactor[dsb->device->speaker_num[0]] = sqrtf(a) * ingain;
}
void DSOUND_Calc3DBuffer(IDirectSoundBufferImpl *dsb)
{
/* volume, at which the sound will be played after all calcs. */
D3DVALUE lVolume = 0;
/* stuff for distance related stuff calc. */
D3DVECTOR vDistance;
D3DVALUE flDistance = 0;
/* panning related stuff */
D3DVALUE flAngle;
D3DVECTOR vLeft;
/* doppler shift related stuff */
#if 0
D3DVALUE flFreq, flBufferVel, flListenerVel;
#endif
TRACE("(%p)\n",dsb);
/* initial buffer volume */
lVolume = dsb->ds3db_lVolume;
switch (dsb->ds3db_ds3db.dwMode)
{
case DS3DMODE_DISABLE:
TRACE("3D processing disabled\n");
/* this one is here only to eliminate annoying warning message */
DSOUND_RecalcVolPan (&dsb->volpan);
break;
case DS3DMODE_NORMAL:
TRACE("Normal 3D processing mode\n");
/* we need to calculate distance between buffer and listener*/
vDistance = VectorBetweenTwoPoints(&dsb->ds3db_ds3db.vPosition, &dsb->device->ds3dl.vPosition);
flDistance = VectorMagnitude (&vDistance);
break;
case DS3DMODE_HEADRELATIVE:
TRACE("Head-relative 3D processing mode\n");
/* distance between buffer and listener is same as buffer's position */
flDistance = VectorMagnitude (&dsb->ds3db_ds3db.vPosition);
break;
}
if (flDistance > dsb->ds3db_ds3db.flMaxDistance)
{
/* some apps don't want you to hear too distant sounds... */
if (dsb->dsbd.dwFlags & DSBCAPS_MUTE3DATMAXDISTANCE)
{
dsb->volpan.lVolume = DSBVOLUME_MIN;
DSOUND_RecalcVolPan (&dsb->volpan);
/* i guess mixing here would be a waste of power */
return;
}
else
flDistance = dsb->ds3db_ds3db.flMaxDistance;
}
if (flDistance < dsb->ds3db_ds3db.flMinDistance)
flDistance = dsb->ds3db_ds3db.flMinDistance;
/* attenuation proportional to the distance squared, converted to millibels as in lVolume*/
lVolume -= log10(flDistance/dsb->ds3db_ds3db.flMinDistance * flDistance/dsb->ds3db_ds3db.flMinDistance)*1000;
TRACE("dist. att: Distance = %f, MinDistance = %f => adjusting volume %d to %f\n", flDistance, dsb->ds3db_ds3db.flMinDistance, dsb->ds3db_lVolume, lVolume);
/* conning */
/* sometimes it happens that vConeOrientation vector = (0,0,0); in this case angle is "nan" and it's useless*/
if (dsb->ds3db_ds3db.vConeOrientation.x == 0 && dsb->ds3db_ds3db.vConeOrientation.y == 0 && dsb->ds3db_ds3db.vConeOrientation.z == 0)
{
TRACE("conning: cones not set\n");
}
else
{
/* calculate angle */
flAngle = AngleBetweenVectorsDeg(&dsb->ds3db_ds3db.vConeOrientation, &vDistance);
/* if by any chance it happens that OutsideConeAngle = InsideConeAngle (that means that conning has no effect) */
if (dsb->ds3db_ds3db.dwInsideConeAngle != dsb->ds3db_ds3db.dwOutsideConeAngle)
{
/* my test show that for my way of calc., we need only half of angles */
DWORD dwInsideConeAngle = dsb->ds3db_ds3db.dwInsideConeAngle/2;
DWORD dwOutsideConeAngle = dsb->ds3db_ds3db.dwOutsideConeAngle/2;
if (dwOutsideConeAngle == dwInsideConeAngle)
++dwOutsideConeAngle;
/* full volume */
if (flAngle < dwInsideConeAngle)
flAngle = dwInsideConeAngle;
/* min (app defined) volume */
if (flAngle > dwOutsideConeAngle)
flAngle = dwOutsideConeAngle;
/* this probably isn't the right thing, but it's ok for the time being */
lVolume += ((dsb->ds3db_ds3db.lConeOutsideVolume)/((dwOutsideConeAngle) - (dwInsideConeAngle))) * flAngle;
}
TRACE("conning: Angle = %f deg; InsideConeAngle(/2) = %d deg; OutsideConeAngle(/2) = %d deg; ConeOutsideVolume = %d => adjusting volume to %f\n",
flAngle, dsb->ds3db_ds3db.dwInsideConeAngle/2, dsb->ds3db_ds3db.dwOutsideConeAngle/2, dsb->ds3db_ds3db.lConeOutsideVolume, lVolume);
}
dsb->volpan.lVolume = lVolume;
/* panning */
if (dsb->device->ds3dl.vPosition.x == dsb->ds3db_ds3db.vPosition.x &&
dsb->device->ds3dl.vPosition.y == dsb->ds3db_ds3db.vPosition.y &&
dsb->device->ds3dl.vPosition.z == dsb->ds3db_ds3db.vPosition.z) {
dsb->volpan.lPan = 0;
flAngle = 0.0;
}
else
{
vDistance = VectorBetweenTwoPoints(&dsb->device->ds3dl.vPosition, &dsb->ds3db_ds3db.vPosition);
vLeft = VectorProduct(&dsb->device->ds3dl.vOrientFront, &dsb->device->ds3dl.vOrientTop);
flAngle = AngleBetweenVectorsRad(&vLeft, &vDistance);
/* for now, we'll use "linear formula" (which is probably incorrect); if someone has it in book, correct it */
dsb->volpan.lPan = 10000*2*flAngle/M_PI - 10000;
}
TRACE("panning: Angle = %f rad, lPan = %d\n", flAngle, dsb->volpan.lPan);
/* FIXME: Doppler Effect disabled since i have no idea which frequency to change and how to do it */
#if 0
/* doppler shift*/
if ((VectorMagnitude(&ds3db_ds3db.vVelocity) == 0) && (VectorMagnitude(&dsb->device->ds3dl.vVelocity) == 0))
{
TRACE("doppler: Buffer and Listener don't have velocities\n");
}
else if (ds3db_ds3db.vVelocity != dsb->device->ds3dl.vVelocity)
{
/* calculate length of ds3db_ds3db.vVelocity component which causes Doppler Effect
NOTE: if buffer moves TOWARDS the listener, it's velocity component is NEGATIVE
if buffer moves AWAY from listener, it's velocity component is POSITIVE */
flBufferVel = ProjectVector(&dsb->ds3db_ds3db.vVelocity, &vDistance);
/* calculate length of ds3dl.vVelocity component which causes Doppler Effect
NOTE: if listener moves TOWARDS the buffer, it's velocity component is POSITIVE
if listener moves AWAY from buffer, it's velocity component is NEGATIVE */
flListenerVel = ProjectVector(&dsb->device->ds3dl.vVelocity, &vDistance);
/* formula taken from Gianicoli D.: Physics, 4th edition: */
/* FIXME: replace dsb->freq with appropriate frequency ! */
flFreq = dsb->freq * ((DEFAULT_VELOCITY + flListenerVel)/(DEFAULT_VELOCITY + flBufferVel));
TRACE("doppler: Buffer velocity (component) = %lf, Listener velocity (component) = %lf => Doppler shift: %ld Hz -> %lf Hz\n", flBufferVel, flListenerVel,
dsb->freq, flFreq);
/* FIXME: replace following line with correct frequency setting ! */
dsb->freq = flFreq;
DSOUND_RecalcFormat(dsb);
DSOUND_MixToTemporary(dsb, 0, dsb->buflen);
}
#endif
/* time for remix */
DSOUND_RecalcVolPan(&dsb->volpan);
}
