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Framework for the doppler effect.

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Rok Mandeljc 2003-03-31 01:34:08 +00:00 committed by Alexandre Julliard
parent f6d22cec9e
commit ce7a2bab97
1 changed files with 46 additions and 7 deletions
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53
dlls/dsound/sound3d.c
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@ -67,6 +67,8 @@
/* default intensity level for human ears */
#define DEFAULT_INTENSITY 0.000000000001f
/* default velocity of sound in the air */
#define DEFAULT_VELOCITY 340
WINE_DEFAULT_DEBUG_CHANNEL(dsound3d);
@ -135,7 +137,7 @@ static inline D3DVALUE AngleBetweenVectorsDeg (LPD3DVECTOR a, LPD3DVECTOR b)
angle = acos(cos);
/* we now have angle in radians */
angle = RadToDeg(angle);
TRACE("angle between (%f,%f,%f) and (%f,%f,%f) = %f degrees\n", a->u1.x, a->u2.y, a->u3.z, b->u1.x, \
TRACE("angle between (%f,%f,%f) and (%f,%f,%f) = %f degrees\n", a->u1.x, a->u2.y, a->u3.z, b->u1.x,
b->u2.y, b->u3.z, angle);
return angle;
}
@ -150,7 +152,7 @@ static inline D3DVALUE AngleBetweenVectorsRad (LPD3DVECTOR a, LPD3DVECTOR b)
lb = VectorMagnitude (b);
cos = product/(la*lb);
angle = acos(cos);
TRACE("angle between (%f,%f,%f) and (%f,%f,%f) = %f radians\n", a->u1.x, a->u2.y, a->u3.z, b->u1.x, \
TRACE("angle between (%f,%f,%f) and (%f,%f,%f) = %f radians\n", a->u1.x, a->u2.y, a->u3.z, b->u1.x,
b->u2.y, b->u3.z, angle);
return angle;
}
@ -162,11 +164,22 @@ static inline D3DVECTOR VectorBetweenTwoPoints (LPD3DVECTOR a, LPD3DVECTOR b)
c.u1.x = b->u1.x - a->u1.x;
c.u2.y = b->u2.y - a->u2.y;
c.u3.z = b->u3.z - a->u3.z;
TRACE("A (%f,%f,%f), B (%f,%f,%f), AB = (%f,%f,%f)\n", a->u1.x, a->u2.y, a->u3.z, b->u1.x, b->u2.y, \
TRACE("A (%f,%f,%f), B (%f,%f,%f), AB = (%f,%f,%f)\n", a->u1.x, a->u2.y, a->u3.z, b->u1.x, b->u2.y,
b->u3.z, c.u1.x, c.u2.y, c.u3.z);
return c;
}
/* calculates the lenght of vector's projection on another vector */
static inline D3DVALUE ProjectVector (LPD3DVECTOR a, LPD3DVECTOR p)
{
D3DVALUE prod, result;
prod = ScalarProduct(a, p);
result = prod/VectorMagnitude(p);
TRACE("length projection of (%f,%f,%f) on (%f,%f,%f) = %f\n", a->u1.x, a->u2.y, a->u3.z, p->u1.x,
p->u2.y, p->u3.z, result);
return result;
}
/*******************************************************************************
* 3D Buffer and Listener mixing
*/
@ -186,6 +199,8 @@ static void WINAPI DSOUND_Mix3DBuffer(IDirectSound3DBufferImpl *ds3db)
/* panning related stuff */
D3DVALUE flAngle;
D3DVECTOR vLeft;
/* doppler shift related stuff */
D3DVALUE flFreq, flBufferVel, flListenerVel;
if (ds3db->dsb->dsound->listener == NULL)
return;
@ -271,6 +286,7 @@ static void WINAPI DSOUND_Mix3DBuffer(IDirectSound3DBufferImpl *ds3db)
TRACE("conning: Angle = %f deg; InsideConeAngle(/2) = %ld deg; OutsideConeAngle(/2) = %ld deg; ConeOutsideVolume = %ld => adjusting volume to %f\n",
flAngle, ds3db->ds3db.dwInsideConeAngle/2, ds3db->ds3db.dwOutsideConeAngle/2, ds3db->ds3db.lConeOutsideVolume, lVolume);
}
ds3db->dsb->volpan.lVolume = lVolume;
/* panning */
vDistance = VectorBetweenTwoPoints(&dsl->ds3dl.vPosition, &ds3db->ds3db.vPosition);
@ -279,12 +295,35 @@ static void WINAPI DSOUND_Mix3DBuffer(IDirectSound3DBufferImpl *ds3db)
/* for now, we'll use "linear formula" (which is probably incorrect); if someone has it in book, correct it */
ds3db->dsb->volpan.lPan = 10000*2*flAngle/M_PI - 10000;
TRACE("panning: Angle = %f rad, lPan = %ld\n", flAngle, ds3db->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(&dsl->ds3dl.vVelocity) == 0))
{
TRACE("doppler: Buffer and Listener don't have velocities\n");
}
else
{
/* calculate lenght of 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(&ds3db->ds3db.vVelocity, &vDistance);
/* calculate lenght 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(&dsl->ds3dl.vVelocity, &vDistance);
/* formula taken from Gianicoli D.: Physics, 4th edition: */
/* FIXME: replace ds3db->dsb->freq with appropriate frequency ! */
flFreq = ds3db->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, \
ds3db->dsb->freq, flFreq);
/* FIXME: replace following line with correct frequency setting ! */
ds3db->dsb->freq = flFreq;
}
#endif
/* at last, we got the desired volume */
ds3db->dsb->volpan.lVolume = lVolume;
ds3db->dsb->dsound->volpan.lVolume = lVolume;
/* time for remix */
DSOUND_RecalcVolPan (&ds3db->dsb->volpan);
DSOUND_ForceRemix (ds3db->dsb);
}