/** * OpenAL cross platform audio library * Copyright (C) 1999-2007 by authors. * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. * Or go to http://www.gnu.org/copyleft/lgpl.html */ #include "config.h" #include #include #include #include #include #include "alMain.h" #include "AL/al.h" #include "AL/alc.h" #include "alSource.h" #include "alBuffer.h" #include "alThunk.h" #include "alListener.h" #include "alAuxEffectSlot.h" #include "alu.h" #include "bs2b.h" #define FRACTIONBITS 14 #define FRACTIONMASK ((1L<>8)+128; } static __inline ALvoid aluCrossproduct(const ALfloat *inVector1, const ALfloat *inVector2, ALfloat *outVector) { outVector[0] = inVector1[1]*inVector2[2] - inVector1[2]*inVector2[1]; outVector[1] = inVector1[2]*inVector2[0] - inVector1[0]*inVector2[2]; outVector[2] = inVector1[0]*inVector2[1] - inVector1[1]*inVector2[0]; } static __inline ALfloat aluDotproduct(const ALfloat *inVector1, const ALfloat *inVector2) { return inVector1[0]*inVector2[0] + inVector1[1]*inVector2[1] + inVector1[2]*inVector2[2]; } static __inline ALvoid aluNormalize(ALfloat *inVector) { ALfloat length, inverse_length; length = aluSqrt(aluDotproduct(inVector, inVector)); if(length != 0.0f) { inverse_length = 1.0f/length; inVector[0] *= inverse_length; inVector[1] *= inverse_length; inVector[2] *= inverse_length; } } static __inline ALvoid aluMatrixVector(ALfloat *vector,ALfloat w,ALfloat matrix[4][4]) { ALfloat temp[4] = { vector[0], vector[1], vector[2], w }; vector[0] = temp[0]*matrix[0][0] + temp[1]*matrix[1][0] + temp[2]*matrix[2][0] + temp[3]*matrix[3][0]; vector[1] = temp[0]*matrix[0][1] + temp[1]*matrix[1][1] + temp[2]*matrix[2][1] + temp[3]*matrix[3][1]; vector[2] = temp[0]*matrix[0][2] + temp[1]*matrix[1][2] + temp[2]*matrix[2][2] + temp[3]*matrix[3][2]; } static ALvoid SetSpeakerArrangement(const char *name, ALfloat SpeakerAngle[OUTPUTCHANNELS], Channel Speaker2Chan[OUTPUTCHANNELS], ALint chans) { char layout_str[256]; char *confkey, *next; char *sep, *end; Channel val; int i; strncpy(layout_str, GetConfigValue(NULL, name, ""), sizeof(layout_str)); layout_str[255] = 0; if(!layout_str[0]) return; next = confkey = layout_str; while(next && *next) { confkey = next; next = strchr(confkey, ','); if(next) { *next = 0; do { next++; } while(isspace(*next) || *next == ','); } sep = strchr(confkey, '='); if(!sep || confkey == sep) continue; end = sep - 1; while(isspace(*end) && end != confkey) end--; *(++end) = 0; if(strcmp(confkey, "fl") == 0 || strcmp(confkey, "front-left") == 0) val = FRONT_LEFT; else if(strcmp(confkey, "fr") == 0 || strcmp(confkey, "front-right") == 0) val = FRONT_RIGHT; else if(strcmp(confkey, "fc") == 0 || strcmp(confkey, "front-center") == 0) val = FRONT_CENTER; else if(strcmp(confkey, "bl") == 0 || strcmp(confkey, "back-left") == 0) val = BACK_LEFT; else if(strcmp(confkey, "br") == 0 || strcmp(confkey, "back-right") == 0) val = BACK_RIGHT; else if(strcmp(confkey, "bc") == 0 || strcmp(confkey, "back-center") == 0) val = BACK_CENTER; else if(strcmp(confkey, "sl") == 0 || strcmp(confkey, "side-left") == 0) val = SIDE_LEFT; else if(strcmp(confkey, "sr") == 0 || strcmp(confkey, "side-right") == 0) val = SIDE_RIGHT; else { AL_PRINT("Unknown speaker for %s: \"%s\"\n", name, confkey); continue; } *(sep++) = 0; while(isspace(*sep)) sep++; for(i = 0;i < chans;i++) { if(Speaker2Chan[i] == val) { long angle = strtol(sep, NULL, 10); if(angle >= -180 && angle <= 180) SpeakerAngle[i] = angle * M_PI/180.0f; else AL_PRINT("Invalid angle for speaker \"%s\": %ld\n", confkey, angle); break; } } } for(i = 0;i < chans;i++) { int min = i; int i2; for(i2 = i+1;i2 < chans;i2++) { if(SpeakerAngle[i2] < SpeakerAngle[min]) min = i2; } if(min != i) { ALfloat tmpf; Channel tmpc; tmpf = SpeakerAngle[i]; SpeakerAngle[i] = SpeakerAngle[min]; SpeakerAngle[min] = tmpf; tmpc = Speaker2Chan[i]; Speaker2Chan[i] = Speaker2Chan[min]; Speaker2Chan[min] = tmpc; } } } static __inline ALfloat aluLUTpos2Angle(ALint pos) { if(pos < QUADRANT_NUM) return aluAtan((ALfloat)pos / (ALfloat)(QUADRANT_NUM - pos)); if(pos < 2 * QUADRANT_NUM) return M_PI_2 + aluAtan((ALfloat)(pos - QUADRANT_NUM) / (ALfloat)(2 * QUADRANT_NUM - pos)); if(pos < 3 * QUADRANT_NUM) return aluAtan((ALfloat)(pos - 2 * QUADRANT_NUM) / (ALfloat)(3 * QUADRANT_NUM - pos)) - M_PI; return aluAtan((ALfloat)(pos - 3 * QUADRANT_NUM) / (ALfloat)(4 * QUADRANT_NUM - pos)) - M_PI_2; } ALvoid aluInitPanning(ALCdevice *Device) { ALfloat SpeakerAngle[OUTPUTCHANNELS]; Channel *Speaker2Chan; ALfloat Alpha, Theta; ALint pos, offset; ALuint s, s2; for(s = 0;s < OUTPUTCHANNELS;s++) { for(s2 = 0;s2 < OUTPUTCHANNELS;s2++) Device->ChannelMatrix[s][s2] = ((s==s2) ? 1.0f : 0.0f); } Speaker2Chan = Device->Speaker2Chan; switch(Device->Format) { case AL_FORMAT_MONO8: case AL_FORMAT_MONO16: case AL_FORMAT_MONO_FLOAT32: Device->DuplicateStereo = AL_FALSE; Device->ChannelMatrix[FRONT_LEFT][FRONT_CENTER] = aluSqrt(0.5); Device->ChannelMatrix[FRONT_RIGHT][FRONT_CENTER] = aluSqrt(0.5); Device->ChannelMatrix[SIDE_LEFT][FRONT_CENTER] = aluSqrt(0.5); Device->ChannelMatrix[SIDE_RIGHT][FRONT_CENTER] = aluSqrt(0.5); Device->ChannelMatrix[BACK_LEFT][FRONT_CENTER] = aluSqrt(0.5); Device->ChannelMatrix[BACK_RIGHT][FRONT_CENTER] = aluSqrt(0.5); Device->ChannelMatrix[BACK_CENTER][FRONT_CENTER] = 1.0f; Device->NumChan = 1; Speaker2Chan[0] = FRONT_CENTER; SpeakerAngle[0] = 0.0f * M_PI/180.0f; break; case AL_FORMAT_STEREO8: case AL_FORMAT_STEREO16: case AL_FORMAT_STEREO_FLOAT32: Device->DuplicateStereo = AL_FALSE; Device->ChannelMatrix[FRONT_CENTER][FRONT_LEFT] = aluSqrt(0.5); Device->ChannelMatrix[FRONT_CENTER][FRONT_RIGHT] = aluSqrt(0.5); Device->ChannelMatrix[SIDE_LEFT][FRONT_LEFT] = 1.0f; Device->ChannelMatrix[SIDE_RIGHT][FRONT_RIGHT] = 1.0f; Device->ChannelMatrix[BACK_LEFT][FRONT_LEFT] = 1.0f; Device->ChannelMatrix[BACK_RIGHT][FRONT_RIGHT] = 1.0f; Device->ChannelMatrix[BACK_CENTER][FRONT_LEFT] = aluSqrt(0.5); Device->ChannelMatrix[BACK_CENTER][FRONT_RIGHT] = aluSqrt(0.5); Device->NumChan = 2; Speaker2Chan[0] = FRONT_LEFT; Speaker2Chan[1] = FRONT_RIGHT; SpeakerAngle[0] = -90.0f * M_PI/180.0f; SpeakerAngle[1] = 90.0f * M_PI/180.0f; SetSpeakerArrangement("layout", SpeakerAngle, Speaker2Chan, Device->NumChan); break; case AL_FORMAT_QUAD8: case AL_FORMAT_QUAD16: case AL_FORMAT_QUAD32: Device->DuplicateStereo = GetConfigValueBool(NULL, "stereodup", 0); Device->ChannelMatrix[FRONT_CENTER][FRONT_LEFT] = aluSqrt(0.5); Device->ChannelMatrix[FRONT_CENTER][FRONT_RIGHT] = aluSqrt(0.5); Device->ChannelMatrix[SIDE_LEFT][FRONT_LEFT] = aluSqrt(0.5); Device->ChannelMatrix[SIDE_LEFT][BACK_LEFT] = aluSqrt(0.5); Device->ChannelMatrix[SIDE_RIGHT][FRONT_RIGHT] = aluSqrt(0.5); Device->ChannelMatrix[SIDE_RIGHT][BACK_RIGHT] = aluSqrt(0.5); Device->ChannelMatrix[BACK_CENTER][BACK_LEFT] = aluSqrt(0.5); Device->ChannelMatrix[BACK_CENTER][BACK_RIGHT] = aluSqrt(0.5); Device->NumChan = 4; Speaker2Chan[0] = BACK_LEFT; Speaker2Chan[1] = FRONT_LEFT; Speaker2Chan[2] = FRONT_RIGHT; Speaker2Chan[3] = BACK_RIGHT; SpeakerAngle[0] = -135.0f * M_PI/180.0f; SpeakerAngle[1] = -45.0f * M_PI/180.0f; SpeakerAngle[2] = 45.0f * M_PI/180.0f; SpeakerAngle[3] = 135.0f * M_PI/180.0f; SetSpeakerArrangement("layout", SpeakerAngle, Speaker2Chan, Device->NumChan); break; case AL_FORMAT_51CHN8: case AL_FORMAT_51CHN16: case AL_FORMAT_51CHN32: Device->DuplicateStereo = GetConfigValueBool(NULL, "stereodup", 0); Device->ChannelMatrix[SIDE_LEFT][FRONT_LEFT] = aluSqrt(0.5); Device->ChannelMatrix[SIDE_LEFT][BACK_LEFT] = aluSqrt(0.5); Device->ChannelMatrix[SIDE_RIGHT][FRONT_RIGHT] = aluSqrt(0.5); Device->ChannelMatrix[SIDE_RIGHT][BACK_RIGHT] = aluSqrt(0.5); Device->ChannelMatrix[BACK_CENTER][BACK_LEFT] = aluSqrt(0.5); Device->ChannelMatrix[BACK_CENTER][BACK_RIGHT] = aluSqrt(0.5); Device->NumChan = 5; Speaker2Chan[0] = BACK_LEFT; Speaker2Chan[1] = FRONT_LEFT; Speaker2Chan[2] = FRONT_CENTER; Speaker2Chan[3] = FRONT_RIGHT; Speaker2Chan[4] = BACK_RIGHT; SpeakerAngle[0] = -110.0f * M_PI/180.0f; SpeakerAngle[1] = -30.0f * M_PI/180.0f; SpeakerAngle[2] = 0.0f * M_PI/180.0f; SpeakerAngle[3] = 30.0f * M_PI/180.0f; SpeakerAngle[4] = 110.0f * M_PI/180.0f; SetSpeakerArrangement("layout", SpeakerAngle, Speaker2Chan, Device->NumChan); break; case AL_FORMAT_61CHN8: case AL_FORMAT_61CHN16: case AL_FORMAT_61CHN32: Device->DuplicateStereo = GetConfigValueBool(NULL, "stereodup", 0); Device->ChannelMatrix[BACK_LEFT][BACK_CENTER] = aluSqrt(0.5); Device->ChannelMatrix[BACK_LEFT][SIDE_LEFT] = aluSqrt(0.5); Device->ChannelMatrix[BACK_RIGHT][BACK_CENTER] = aluSqrt(0.5); Device->ChannelMatrix[BACK_RIGHT][SIDE_RIGHT] = aluSqrt(0.5); Device->NumChan = 6; Speaker2Chan[0] = SIDE_LEFT; Speaker2Chan[1] = FRONT_LEFT; Speaker2Chan[2] = FRONT_CENTER; Speaker2Chan[3] = FRONT_RIGHT; Speaker2Chan[4] = SIDE_RIGHT; Speaker2Chan[5] = BACK_CENTER; SpeakerAngle[0] = -90.0f * M_PI/180.0f; SpeakerAngle[1] = -30.0f * M_PI/180.0f; SpeakerAngle[2] = 0.0f * M_PI/180.0f; SpeakerAngle[3] = 30.0f * M_PI/180.0f; SpeakerAngle[4] = 90.0f * M_PI/180.0f; SpeakerAngle[5] = 180.0f * M_PI/180.0f; SetSpeakerArrangement("layout", SpeakerAngle, Speaker2Chan, Device->NumChan); break; case AL_FORMAT_71CHN8: case AL_FORMAT_71CHN16: case AL_FORMAT_71CHN32: Device->DuplicateStereo = GetConfigValueBool(NULL, "stereodup", 0); Device->ChannelMatrix[BACK_CENTER][BACK_LEFT] = aluSqrt(0.5); Device->ChannelMatrix[BACK_CENTER][BACK_RIGHT] = aluSqrt(0.5); Device->NumChan = 7; Speaker2Chan[0] = BACK_LEFT; Speaker2Chan[1] = SIDE_LEFT; Speaker2Chan[2] = FRONT_LEFT; Speaker2Chan[3] = FRONT_CENTER; Speaker2Chan[4] = FRONT_RIGHT; Speaker2Chan[5] = SIDE_RIGHT; Speaker2Chan[6] = BACK_RIGHT; SpeakerAngle[0] = -150.0f * M_PI/180.0f; SpeakerAngle[1] = -90.0f * M_PI/180.0f; SpeakerAngle[2] = -30.0f * M_PI/180.0f; SpeakerAngle[3] = 0.0f * M_PI/180.0f; SpeakerAngle[4] = 30.0f * M_PI/180.0f; SpeakerAngle[5] = 90.0f * M_PI/180.0f; SpeakerAngle[6] = 150.0f * M_PI/180.0f; SetSpeakerArrangement("layout", SpeakerAngle, Speaker2Chan, Device->NumChan); break; default: assert(0); } if(GetConfigValueBool(NULL, "scalemix", 0)) { ALfloat maxout = 1.0f; for(s = 0;s < OUTPUTCHANNELS;s++) { ALfloat out = 0.0f; for(s2 = 0;s2 < OUTPUTCHANNELS;s2++) out += Device->ChannelMatrix[s2][s]; maxout = __max(maxout, out); } maxout = 1.0f/maxout; for(s = 0;s < OUTPUTCHANNELS;s++) { for(s2 = 0;s2 < OUTPUTCHANNELS;s2++) Device->ChannelMatrix[s2][s] *= maxout; } } for(pos = 0; pos < LUT_NUM; pos++) { /* clear all values */ offset = OUTPUTCHANNELS * pos; for(s = 0; s < OUTPUTCHANNELS; s++) Device->PanningLUT[offset+s] = 0.0f; if(Device->NumChan == 1) { Device->PanningLUT[offset + Speaker2Chan[0]] = 1.0f; continue; } /* source angle */ Theta = aluLUTpos2Angle(pos); /* set panning values */ for(s = 0; s < Device->NumChan - 1; s++) { if(Theta >= SpeakerAngle[s] && Theta < SpeakerAngle[s+1]) { /* source between speaker s and speaker s+1 */ Alpha = M_PI_2 * (Theta-SpeakerAngle[s]) / (SpeakerAngle[s+1]-SpeakerAngle[s]); Device->PanningLUT[offset + Speaker2Chan[s]] = cos(Alpha); Device->PanningLUT[offset + Speaker2Chan[s+1]] = sin(Alpha); break; } } if(s == Device->NumChan - 1) { /* source between last and first speaker */ if(Theta < SpeakerAngle[0]) Theta += 2.0f * M_PI; Alpha = M_PI_2 * (Theta-SpeakerAngle[s]) / (2.0f * M_PI + SpeakerAngle[0]-SpeakerAngle[s]); Device->PanningLUT[offset + Speaker2Chan[s]] = cos(Alpha); Device->PanningLUT[offset + Speaker2Chan[0]] = sin(Alpha); } } } static ALvoid CalcNonAttnSourceParams(const ALCcontext *ALContext, ALsource *ALSource) { ALfloat SourceVolume,ListenerGain,MinVolume,MaxVolume; ALfloat DryGain, DryGainHF; ALfloat WetGain[MAX_SENDS]; ALfloat WetGainHF[MAX_SENDS]; ALint NumSends, Frequency; ALfloat cw; ALint i; //Get context properties NumSends = ALContext->Device->NumAuxSends; Frequency = ALContext->Device->Frequency; //Get listener properties ListenerGain = ALContext->Listener.Gain; //Get source properties SourceVolume = ALSource->flGain; MinVolume = ALSource->flMinGain; MaxVolume = ALSource->flMaxGain; //1. Multi-channel buffers always play "normal" ALSource->Params.Pitch = ALSource->flPitch; DryGain = SourceVolume; DryGain = __min(DryGain,MaxVolume); DryGain = __max(DryGain,MinVolume); DryGainHF = 1.0f; switch(ALSource->DirectFilter.type) { case AL_FILTER_LOWPASS: DryGain *= ALSource->DirectFilter.Gain; DryGainHF *= ALSource->DirectFilter.GainHF; break; } for(i = 0;i < OUTPUTCHANNELS;i++) ALSource->Params.DryGains[i] = DryGain * ListenerGain; for(i = 0;i < NumSends;i++) { WetGain[i] = SourceVolume; WetGain[i] = __min(WetGain[i],MaxVolume); WetGain[i] = __max(WetGain[i],MinVolume); WetGainHF[i] = 1.0f; switch(ALSource->Send[i].WetFilter.type) { case AL_FILTER_LOWPASS: WetGain[i] *= ALSource->Send[i].WetFilter.Gain; WetGainHF[i] *= ALSource->Send[i].WetFilter.GainHF; break; } ALSource->Params.WetGains[i] = WetGain[i] * ListenerGain; } for(i = NumSends;i < MAX_SENDS;i++) { ALSource->Params.WetGains[i] = 0.0f; WetGainHF[i] = 1.0f; } /* Update filter coefficients. Calculations based on the I3DL2 * spec. */ cw = cos(2.0*M_PI * LOWPASSFREQCUTOFF / Frequency); /* We use two chained one-pole filters, so we need to take the * square root of the squared gain, which is the same as the base * gain. */ ALSource->Params.iirFilter.coeff = lpCoeffCalc(DryGainHF, cw); for(i = 0;i < NumSends;i++) { /* We use a one-pole filter, so we need to take the squared gain */ ALfloat a = lpCoeffCalc(WetGainHF[i]*WetGainHF[i], cw); ALSource->Params.Send[i].iirFilter.coeff = a; } } static ALvoid CalcSourceParams(const ALCcontext *ALContext, ALsource *ALSource) { const ALCdevice *Device = ALContext->Device; ALfloat InnerAngle,OuterAngle,Angle,Distance,DryMix,OrigDist; ALfloat Direction[3],Position[3],SourceToListener[3]; ALfloat Velocity[3],ListenerVel[3]; ALfloat MinVolume,MaxVolume,MinDist,MaxDist,Rolloff,OuterGainHF; ALfloat ConeVolume,ConeHF,SourceVolume,ListenerGain; ALfloat DopplerFactor, DopplerVelocity, flSpeedOfSound; ALfloat Matrix[4][4]; ALfloat flAttenuation, effectiveDist; ALfloat RoomAttenuation[MAX_SENDS]; ALfloat MetersPerUnit; ALfloat RoomRolloff[MAX_SENDS]; ALfloat DryGainHF = 1.0f; ALfloat WetGain[MAX_SENDS]; ALfloat WetGainHF[MAX_SENDS]; ALfloat DirGain, AmbientGain; const ALfloat *SpeakerGain; ALfloat length; ALuint Frequency; ALint NumSends; ALint pos, s, i; ALfloat cw; for(i = 0;i < MAX_SENDS;i++) WetGainHF[i] = 1.0f; //Get context properties DopplerFactor = ALContext->DopplerFactor * ALSource->DopplerFactor; DopplerVelocity = ALContext->DopplerVelocity; flSpeedOfSound = ALContext->flSpeedOfSound; NumSends = Device->NumAuxSends; Frequency = Device->Frequency; //Get listener properties ListenerGain = ALContext->Listener.Gain; MetersPerUnit = ALContext->Listener.MetersPerUnit; memcpy(ListenerVel, ALContext->Listener.Velocity, sizeof(ALContext->Listener.Velocity)); //Get source properties SourceVolume = ALSource->flGain; memcpy(Position, ALSource->vPosition, sizeof(ALSource->vPosition)); memcpy(Direction, ALSource->vOrientation, sizeof(ALSource->vOrientation)); memcpy(Velocity, ALSource->vVelocity, sizeof(ALSource->vVelocity)); MinVolume = ALSource->flMinGain; MaxVolume = ALSource->flMaxGain; MinDist = ALSource->flRefDistance; MaxDist = ALSource->flMaxDistance; Rolloff = ALSource->flRollOffFactor; InnerAngle = ALSource->flInnerAngle; OuterAngle = ALSource->flOuterAngle; OuterGainHF = ALSource->OuterGainHF; //1. Translate Listener to origin (convert to head relative) if(ALSource->bHeadRelative==AL_FALSE) { ALfloat U[3],V[3],N[3]; // Build transform matrix memcpy(N, ALContext->Listener.Forward, sizeof(N)); // At-vector aluNormalize(N); // Normalized At-vector memcpy(V, ALContext->Listener.Up, sizeof(V)); // Up-vector aluNormalize(V); // Normalized Up-vector aluCrossproduct(N, V, U); // Right-vector aluNormalize(U); // Normalized Right-vector Matrix[0][0] = U[0]; Matrix[0][1] = V[0]; Matrix[0][2] = -N[0]; Matrix[0][3] = 0.0f; Matrix[1][0] = U[1]; Matrix[1][1] = V[1]; Matrix[1][2] = -N[1]; Matrix[1][3] = 0.0f; Matrix[2][0] = U[2]; Matrix[2][1] = V[2]; Matrix[2][2] = -N[2]; Matrix[2][3] = 0.0f; Matrix[3][0] = 0.0f; Matrix[3][1] = 0.0f; Matrix[3][2] = 0.0f; Matrix[3][3] = 1.0f; // Translate position Position[0] -= ALContext->Listener.Position[0]; Position[1] -= ALContext->Listener.Position[1]; Position[2] -= ALContext->Listener.Position[2]; // Transform source position and direction into listener space aluMatrixVector(Position, 1.0f, Matrix); aluMatrixVector(Direction, 0.0f, Matrix); // Transform source and listener velocity into listener space aluMatrixVector(Velocity, 0.0f, Matrix); aluMatrixVector(ListenerVel, 0.0f, Matrix); } else ListenerVel[0] = ListenerVel[1] = ListenerVel[2] = 0.0f; SourceToListener[0] = -Position[0]; SourceToListener[1] = -Position[1]; SourceToListener[2] = -Position[2]; aluNormalize(SourceToListener); aluNormalize(Direction); //2. Calculate distance attenuation Distance = aluSqrt(aluDotproduct(Position, Position)); OrigDist = Distance; flAttenuation = 1.0f; for(i = 0;i < NumSends;i++) { RoomAttenuation[i] = 1.0f; RoomRolloff[i] = ALSource->RoomRolloffFactor; if(ALSource->Send[i].Slot && (ALSource->Send[i].Slot->effect.type == AL_EFFECT_REVERB || ALSource->Send[i].Slot->effect.type == AL_EFFECT_EAXREVERB)) RoomRolloff[i] += ALSource->Send[i].Slot->effect.Reverb.RoomRolloffFactor; } switch(ALContext->SourceDistanceModel ? ALSource->DistanceModel : ALContext->DistanceModel) { case AL_INVERSE_DISTANCE_CLAMPED: Distance=__max(Distance,MinDist); Distance=__min(Distance,MaxDist); if(MaxDist < MinDist) break; //fall-through case AL_INVERSE_DISTANCE: if(MinDist > 0.0f) { if((MinDist + (Rolloff * (Distance - MinDist))) > 0.0f) flAttenuation = MinDist / (MinDist + (Rolloff * (Distance - MinDist))); for(i = 0;i < NumSends;i++) { if((MinDist + (RoomRolloff[i] * (Distance - MinDist))) > 0.0f) RoomAttenuation[i] = MinDist / (MinDist + (RoomRolloff[i] * (Distance - MinDist))); } } break; case AL_LINEAR_DISTANCE_CLAMPED: Distance=__max(Distance,MinDist); Distance=__min(Distance,MaxDist); if(MaxDist < MinDist) break; //fall-through case AL_LINEAR_DISTANCE: Distance=__min(Distance,MaxDist); if(MaxDist != MinDist) { flAttenuation = 1.0f - (Rolloff*(Distance-MinDist)/(MaxDist - MinDist)); for(i = 0;i < NumSends;i++) RoomAttenuation[i] = 1.0f - (RoomRolloff[i]*(Distance-MinDist)/(MaxDist - MinDist)); } break; case AL_EXPONENT_DISTANCE_CLAMPED: Distance=__max(Distance,MinDist); Distance=__min(Distance,MaxDist); if(MaxDist < MinDist) break; //fall-through case AL_EXPONENT_DISTANCE: if(Distance > 0.0f && MinDist > 0.0f) { flAttenuation = aluPow(Distance/MinDist, -Rolloff); for(i = 0;i < NumSends;i++) RoomAttenuation[i] = aluPow(Distance/MinDist, -RoomRolloff[i]); } break; case AL_NONE: break; } // Source Gain + Attenuation DryMix = SourceVolume * flAttenuation; for(i = 0;i < NumSends;i++) WetGain[i] = SourceVolume * RoomAttenuation[i]; effectiveDist = 0.0f; if(MinDist > 0.0f) effectiveDist = (MinDist/flAttenuation - MinDist)*MetersPerUnit; // Distance-based air absorption if(ALSource->AirAbsorptionFactor > 0.0f && effectiveDist > 0.0f) { ALfloat absorb; // Absorption calculation is done in dB absorb = (ALSource->AirAbsorptionFactor*AIRABSORBGAINDBHF) * effectiveDist; // Convert dB to linear gain before applying absorb = aluPow(10.0f, absorb/20.0f); DryGainHF *= absorb; } //3. Apply directional soundcones Angle = aluAcos(aluDotproduct(Direction,SourceToListener)) * 180.0f/M_PI; if(Angle >= InnerAngle && Angle <= OuterAngle) { ALfloat scale = (Angle-InnerAngle) / (OuterAngle-InnerAngle); ConeVolume = (1.0f+(ALSource->flOuterGain-1.0f)*scale); ConeHF = (1.0f+(OuterGainHF-1.0f)*scale); } else if(Angle > OuterAngle) { ConeVolume = (1.0f+(ALSource->flOuterGain-1.0f)); ConeHF = (1.0f+(OuterGainHF-1.0f)); } else { ConeVolume = 1.0f; ConeHF = 1.0f; } // Apply some high-frequency attenuation for sources behind the listener // NOTE: This should be aluDotproduct({0,0,-1}, ListenerToSource), however // that is equivalent to aluDotproduct({0,0,1}, SourceToListener), which is // the same as SourceToListener[2] Angle = aluAcos(SourceToListener[2]) * 180.0f/M_PI; // Sources within the minimum distance attenuate less if(OrigDist < MinDist) Angle *= OrigDist/MinDist; if(Angle > 90.0f) { ALfloat scale = (Angle-90.0f) / (180.1f-90.0f); // .1 to account for fp errors ConeHF *= 1.0f - (Device->HeadDampen*scale); } DryMix *= ConeVolume; if(ALSource->DryGainHFAuto) DryGainHF *= ConeHF; // Clamp to Min/Max Gain DryMix = __min(DryMix,MaxVolume); DryMix = __max(DryMix,MinVolume); for(i = 0;i < NumSends;i++) { ALeffectslot *Slot = ALSource->Send[i].Slot; if(!Slot || Slot->effect.type == AL_EFFECT_NULL) { ALSource->Params.WetGains[i] = 0.0f; WetGainHF[i] = 1.0f; continue; } if(Slot->AuxSendAuto) { if(ALSource->WetGainAuto) WetGain[i] *= ConeVolume; if(ALSource->WetGainHFAuto) WetGainHF[i] *= ConeHF; // Clamp to Min/Max Gain WetGain[i] = __min(WetGain[i],MaxVolume); WetGain[i] = __max(WetGain[i],MinVolume); if(Slot->effect.type == AL_EFFECT_REVERB || Slot->effect.type == AL_EFFECT_EAXREVERB) { /* Apply a decay-time transformation to the wet path, based on * the attenuation of the dry path. * * Using the approximate (effective) source to listener * distance, the initial decay of the reverb effect is * calculated and applied to the wet path. */ WetGain[i] *= aluPow(10.0f, effectiveDist / (SPEEDOFSOUNDMETRESPERSEC * Slot->effect.Reverb.DecayTime) * -60.0 / 20.0); WetGainHF[i] *= aluPow(10.0f, log10(Slot->effect.Reverb.AirAbsorptionGainHF) * ALSource->AirAbsorptionFactor * effectiveDist); } } else { /* If the slot's auxiliary send auto is off, the data sent to the * effect slot is the same as the dry path, sans filter effects */ WetGain[i] = DryMix; WetGainHF[i] = DryGainHF; } switch(ALSource->Send[i].WetFilter.type) { case AL_FILTER_LOWPASS: WetGain[i] *= ALSource->Send[i].WetFilter.Gain; WetGainHF[i] *= ALSource->Send[i].WetFilter.GainHF; break; } ALSource->Params.WetGains[i] = WetGain[i] * ListenerGain; } for(i = NumSends;i < MAX_SENDS;i++) { ALSource->Params.WetGains[i] = 0.0f; WetGainHF[i] = 1.0f; } // Apply filter gains and filters switch(ALSource->DirectFilter.type) { case AL_FILTER_LOWPASS: DryMix *= ALSource->DirectFilter.Gain; DryGainHF *= ALSource->DirectFilter.GainHF; break; } DryMix *= ListenerGain; // Calculate Velocity if(DopplerFactor != 0.0f) { ALfloat flVSS, flVLS; ALfloat flMaxVelocity = (DopplerVelocity * flSpeedOfSound) / DopplerFactor; flVSS = aluDotproduct(Velocity, SourceToListener); if(flVSS >= flMaxVelocity) flVSS = (flMaxVelocity - 1.0f); else if(flVSS <= -flMaxVelocity) flVSS = -flMaxVelocity + 1.0f; flVLS = aluDotproduct(ListenerVel, SourceToListener); if(flVLS >= flMaxVelocity) flVLS = (flMaxVelocity - 1.0f); else if(flVLS <= -flMaxVelocity) flVLS = -flMaxVelocity + 1.0f; ALSource->Params.Pitch = ALSource->flPitch * ((flSpeedOfSound * DopplerVelocity) - (DopplerFactor * flVLS)) / ((flSpeedOfSound * DopplerVelocity) - (DopplerFactor * flVSS)); } else ALSource->Params.Pitch = ALSource->flPitch; // Use energy-preserving panning algorithm for multi-speaker playback length = __max(OrigDist, MinDist); if(length > 0.0f) { ALfloat invlen = 1.0f/length; Position[0] *= invlen; Position[1] *= invlen; Position[2] *= invlen; } pos = aluCart2LUTpos(-Position[2], Position[0]); SpeakerGain = &Device->PanningLUT[OUTPUTCHANNELS * pos]; DirGain = aluSqrt(Position[0]*Position[0] + Position[2]*Position[2]); // elevation adjustment for directional gain. this sucks, but // has low complexity AmbientGain = 1.0/aluSqrt(Device->NumChan) * (1.0-DirGain); for(s = 0;s < OUTPUTCHANNELS;s++) ALSource->Params.DryGains[s] = 0.0f; for(s = 0;s < (ALsizei)Device->NumChan;s++) { Channel chan = Device->Speaker2Chan[s]; ALfloat gain = SpeakerGain[chan]*DirGain + AmbientGain; ALSource->Params.DryGains[chan] = DryMix * gain; } /* Update filter coefficients. */ cw = cos(2.0*M_PI * LOWPASSFREQCUTOFF / Frequency); /* Spatialized sources use four chained one-pole filters, so we need to * take the fourth root of the squared gain, which is the same as the * square root of the base gain. */ ALSource->Params.iirFilter.coeff = lpCoeffCalc(aluSqrt(DryGainHF), cw); for(i = 0;i < NumSends;i++) { /* The wet path uses two chained one-pole filters, so take the * base gain (square root of the squared gain) */ ALSource->Params.Send[i].iirFilter.coeff = lpCoeffCalc(WetGainHF[i], cw); } } static __inline ALfloat point(ALfloat val1, ALfloat val2, ALint frac) { return val1; (void)val2; (void)frac; } static __inline ALfloat lerp(ALfloat val1, ALfloat val2, ALint frac) { return val1 + ((val2-val1)*(frac * (1.0f/(1<Device->DuplicateStereo; DeviceFreq = ALContext->Device->Frequency; rampLength = DeviceFreq * MIN_RAMP_LENGTH / 1000; rampLength = max(rampLength, SamplesToDo); pos = 0; next_source: while(ALContext->ActiveSourceCount > pos) { ALsizei end; ALSource = ALContext->ActiveSources[pos]; if(ALSource->state == AL_PLAYING) break; end = --(ALContext->ActiveSourceCount); ALContext->ActiveSources[pos] = ALContext->ActiveSources[end]; } if(pos >= ALContext->ActiveSourceCount) return; /* Find buffer format */ Frequency = 0; Channels = 0; Bytes = 0; BufferListItem = ALSource->queue; while(BufferListItem != NULL) { ALbuffer *ALBuffer; if((ALBuffer=BufferListItem->buffer) != NULL) { Channels = aluChannelsFromFormat(ALBuffer->format); Bytes = aluBytesFromFormat(ALBuffer->format); Frequency = ALBuffer->frequency; break; } BufferListItem = BufferListItem->next; } if(ALSource->NeedsUpdate) { //Only apply 3D calculations for mono buffers if(Channels == 1) CalcSourceParams(ALContext, ALSource); else CalcNonAttnSourceParams(ALContext, ALSource); ALSource->NeedsUpdate = AL_FALSE; } /* Get source info */ Resampler = ALSource->Resampler; State = ALSource->state; BuffersPlayed = ALSource->BuffersPlayed; DataPosInt = ALSource->position; DataPosFrac = ALSource->position_fraction; Looping = ALSource->bLooping; /* Compute 18.14 fixed point step */ Pitch = (ALSource->Params.Pitch*Frequency) / DeviceFreq; if(Pitch > (float)MAX_PITCH) Pitch = (float)MAX_PITCH; increment = (ALint)(Pitch*(ALfloat)(1L<FirstStart) { for(i = 0;i < OUTPUTCHANNELS;i++) DrySend[i] = ALSource->Params.DryGains[i]; for(i = 0;i < MAX_SENDS;i++) WetSend[i] = ALSource->Params.WetGains[i]; } else { for(i = 0;i < OUTPUTCHANNELS;i++) DrySend[i] = ALSource->DryGains[i]; for(i = 0;i < MAX_SENDS;i++) WetSend[i] = ALSource->WetGains[i]; } DryFilter = &ALSource->Params.iirFilter; for(i = 0;i < MAX_SENDS;i++) { WetFilter[i] = &ALSource->Params.Send[i].iirFilter; WetBuffer[i] = (ALSource->Send[i].Slot ? ALSource->Send[i].Slot->WetBuffer : DummyBuffer); } /* Get current buffer queue item */ BufferListItem = ALSource->queue; for(i = 0;i < BuffersPlayed && BufferListItem;i++) BufferListItem = BufferListItem->next; j = 0; do { ALfloat *Data = NULL; ALuint LoopStart = 0; ALuint LoopEnd = 0; ALuint DataSize = 0; ALbuffer *ALBuffer; ALuint BufferSize; /* Get buffer info */ if((ALBuffer=BufferListItem->buffer) != NULL) { Data = ALBuffer->data; DataSize = ALBuffer->size; DataSize /= Channels * Bytes; LoopStart = ALBuffer->LoopStart; LoopEnd = ALBuffer->LoopEnd; } if(Looping && ALSource->lSourceType == AL_STATIC) { /* If current offset is beyond the loop range, do not loop */ if(DataPosInt >= LoopEnd) Looping = AL_FALSE; } if(!Looping || ALSource->lSourceType != AL_STATIC) { /* Non-looping and non-static sources ignore loop points */ LoopStart = 0; LoopEnd = DataSize; } if(DataPosInt >= DataSize) goto skipmix; if(BufferListItem->next) { ALbuffer *NextBuf = BufferListItem->next->buffer; if(NextBuf && NextBuf->size) { ALint ulExtraSamples = BUFFER_PADDING*Channels*Bytes; ulExtraSamples = min(NextBuf->size, ulExtraSamples); memcpy(&Data[DataSize*Channels], NextBuf->data, ulExtraSamples); } } else if(Looping) { ALbuffer *NextBuf = ALSource->queue->buffer; if(NextBuf && NextBuf->size) { ALint ulExtraSamples = BUFFER_PADDING*Channels*Bytes; ulExtraSamples = min(NextBuf->size, ulExtraSamples); memcpy(&Data[DataSize*Channels], &NextBuf->data[LoopStart*Channels], ulExtraSamples); } } else memset(&Data[DataSize*Channels], 0, (BUFFER_PADDING*Channels*Bytes)); /* Compute the gain steps for each output channel */ for(i = 0;i < OUTPUTCHANNELS;i++) dryGainStep[i] = (ALSource->Params.DryGains[i]-DrySend[i]) / rampLength; for(i = 0;i < MAX_SENDS;i++) wetGainStep[i] = (ALSource->Params.WetGains[i]-WetSend[i]) / rampLength; /* Figure out how many samples we can mix. */ DataSize64 = LoopEnd; DataSize64 <<= FRACTIONBITS; DataPos64 = DataPosInt; DataPos64 <<= FRACTIONBITS; DataPos64 += DataPosFrac; BufferSize = (ALuint)((DataSize64-DataPos64+(increment-1)) / increment); BufferSize = min(BufferSize, (SamplesToDo-j)); /* Actual sample mixing loops */ if(Channels == 1) /* Mono */ { #define DO_MIX(resampler) do { \ while(BufferSize--) \ { \ for(i = 0;i < OUTPUTCHANNELS;i++) \ DrySend[i] += dryGainStep[i]; \ for(i = 0;i < MAX_SENDS;i++) \ WetSend[i] += wetGainStep[i]; \ \ /* First order interpolator */ \ value = (resampler)(Data[DataPosInt], Data[DataPosInt+1], \ DataPosFrac); \ \ /* Direct path final mix buffer and panning */ \ outsamp = lpFilter4P(DryFilter, 0, value); \ DryBuffer[j][FRONT_LEFT] += outsamp*DrySend[FRONT_LEFT]; \ DryBuffer[j][FRONT_RIGHT] += outsamp*DrySend[FRONT_RIGHT]; \ DryBuffer[j][SIDE_LEFT] += outsamp*DrySend[SIDE_LEFT]; \ DryBuffer[j][SIDE_RIGHT] += outsamp*DrySend[SIDE_RIGHT]; \ DryBuffer[j][BACK_LEFT] += outsamp*DrySend[BACK_LEFT]; \ DryBuffer[j][BACK_RIGHT] += outsamp*DrySend[BACK_RIGHT]; \ DryBuffer[j][FRONT_CENTER] += outsamp*DrySend[FRONT_CENTER]; \ DryBuffer[j][BACK_CENTER] += outsamp*DrySend[BACK_CENTER]; \ \ /* Room path final mix buffer and panning */ \ for(i = 0;i < MAX_SENDS;i++) \ { \ outsamp = lpFilter2P(WetFilter[i], 0, value); \ WetBuffer[i][j] += outsamp*WetSend[i]; \ } \ \ DataPosFrac += increment; \ DataPosInt += DataPosFrac>>FRACTIONBITS; \ DataPosFrac &= FRACTIONMASK; \ j++; \ } \ } while(0) switch(Resampler) { case POINT_RESAMPLER: DO_MIX(point); break; case LINEAR_RESAMPLER: DO_MIX(lerp); break; case COSINE_RESAMPLER: DO_MIX(cos_lerp); break; case RESAMPLER_MIN: case RESAMPLER_MAX: break; } #undef DO_MIX } else if(Channels == 2 && DuplicateStereo) /* Stereo */ { const int chans[] = { FRONT_LEFT, FRONT_RIGHT }; const int chans2[] = { BACK_LEFT, SIDE_LEFT, BACK_RIGHT, SIDE_RIGHT }; const ALfloat scaler = 1.0f/Channels; const ALfloat dupscaler = aluSqrt(1.0f/3.0f); #define DO_MIX(resampler) do { \ while(BufferSize--) \ { \ for(i = 0;i < OUTPUTCHANNELS;i++) \ DrySend[i] += dryGainStep[i]; \ for(i = 0;i < MAX_SENDS;i++) \ WetSend[i] += wetGainStep[i]; \ \ for(i = 0;i < Channels;i++) \ { \ value = (resampler)(Data[DataPosInt*Channels + i], \ Data[(DataPosInt+1)*Channels + i], \ DataPosFrac); \ outsamp = lpFilter2P(DryFilter, chans[i]*2, value) * dupscaler; \ DryBuffer[j][chans[i]] += outsamp*DrySend[chans[i]]; \ DryBuffer[j][chans2[i*2+0]] += outsamp*DrySend[chans2[i*2+0]]; \ DryBuffer[j][chans2[i*2+1]] += outsamp*DrySend[chans2[i*2+1]]; \ for(out = 0;out < MAX_SENDS;out++) \ { \ outsamp = lpFilter1P(WetFilter[out], chans[i], value); \ WetBuffer[out][j] += outsamp*WetSend[out]*scaler; \ } \ } \ \ DataPosFrac += increment; \ DataPosInt += DataPosFrac>>FRACTIONBITS; \ DataPosFrac &= FRACTIONMASK; \ j++; \ } \ } while(0) switch(Resampler) { case POINT_RESAMPLER: DO_MIX(point); break; case LINEAR_RESAMPLER: DO_MIX(lerp); break; case COSINE_RESAMPLER: DO_MIX(cos_lerp); break; case RESAMPLER_MIN: case RESAMPLER_MAX: break; } #undef DO_MIX } else if(Channels == 2) /* Stereo */ { const int chans[] = { FRONT_LEFT, FRONT_RIGHT }; const ALfloat scaler = 1.0f/Channels; #define DO_MIX(resampler) do { \ while(BufferSize--) \ { \ for(i = 0;i < OUTPUTCHANNELS;i++) \ DrySend[i] += dryGainStep[i]; \ for(i = 0;i < MAX_SENDS;i++) \ WetSend[i] += wetGainStep[i]; \ \ for(i = 0;i < Channels;i++) \ { \ value = (resampler)(Data[DataPosInt*Channels + i], \ Data[(DataPosInt+1)*Channels + i], \ DataPosFrac); \ outsamp = lpFilter2P(DryFilter, chans[i]*2, value); \ DryBuffer[j][chans[i]] += outsamp*DrySend[chans[i]]; \ for(out = 0;out < MAX_SENDS;out++) \ { \ outsamp = lpFilter1P(WetFilter[out], chans[i], value); \ WetBuffer[out][j] += outsamp*WetSend[out]*scaler; \ } \ } \ \ DataPosFrac += increment; \ DataPosInt += DataPosFrac>>FRACTIONBITS; \ DataPosFrac &= FRACTIONMASK; \ j++; \ } \ } while(0) switch(Resampler) { case POINT_RESAMPLER: DO_MIX(point); break; case LINEAR_RESAMPLER: DO_MIX(lerp); break; case COSINE_RESAMPLER: DO_MIX(cos_lerp); break; case RESAMPLER_MIN: case RESAMPLER_MAX: break; } } else if(Channels == 4) /* Quad */ { const int chans[] = { FRONT_LEFT, FRONT_RIGHT, BACK_LEFT, BACK_RIGHT }; const ALfloat scaler = 1.0f/Channels; switch(Resampler) { case POINT_RESAMPLER: DO_MIX(point); break; case LINEAR_RESAMPLER: DO_MIX(lerp); break; case COSINE_RESAMPLER: DO_MIX(cos_lerp); break; case RESAMPLER_MIN: case RESAMPLER_MAX: break; } } else if(Channels == 6) /* 5.1 */ { const int chans[] = { FRONT_LEFT, FRONT_RIGHT, FRONT_CENTER, LFE, BACK_LEFT, BACK_RIGHT }; const ALfloat scaler = 1.0f/Channels; switch(Resampler) { case POINT_RESAMPLER: DO_MIX(point); break; case LINEAR_RESAMPLER: DO_MIX(lerp); break; case COSINE_RESAMPLER: DO_MIX(cos_lerp); break; case RESAMPLER_MIN: case RESAMPLER_MAX: break; } } else if(Channels == 7) /* 6.1 */ { const int chans[] = { FRONT_LEFT, FRONT_RIGHT, FRONT_CENTER, LFE, BACK_CENTER, SIDE_LEFT, SIDE_RIGHT }; const ALfloat scaler = 1.0f/Channels; switch(Resampler) { case POINT_RESAMPLER: DO_MIX(point); break; case LINEAR_RESAMPLER: DO_MIX(lerp); break; case COSINE_RESAMPLER: DO_MIX(cos_lerp); break; case RESAMPLER_MIN: case RESAMPLER_MAX: break; } } else if(Channels == 8) /* 7.1 */ { const int chans[] = { FRONT_LEFT, FRONT_RIGHT, FRONT_CENTER, LFE, BACK_LEFT, BACK_RIGHT, SIDE_LEFT, SIDE_RIGHT }; const ALfloat scaler = 1.0f/Channels; switch(Resampler) { case POINT_RESAMPLER: DO_MIX(point); break; case LINEAR_RESAMPLER: DO_MIX(lerp); break; case COSINE_RESAMPLER: DO_MIX(cos_lerp); break; case RESAMPLER_MIN: case RESAMPLER_MAX: break; } #undef DO_MIX } else /* Unknown? */ { for(i = 0;i < OUTPUTCHANNELS;i++) DrySend[i] += dryGainStep[i]*BufferSize; for(i = 0;i < MAX_SENDS;i++) WetSend[i] += wetGainStep[i]*BufferSize; while(BufferSize--) { DataPosFrac += increment; DataPosInt += DataPosFrac>>FRACTIONBITS; DataPosFrac &= FRACTIONMASK; j++; } } skipmix: /* Handle looping sources */ if(DataPosInt >= LoopEnd) { if(BuffersPlayed < (ALSource->BuffersInQueue-1)) { BufferListItem = BufferListItem->next; BuffersPlayed++; DataPosInt -= DataSize; } else if(Looping) { BufferListItem = ALSource->queue; BuffersPlayed = 0; if(ALSource->lSourceType == AL_STATIC) DataPosInt = ((DataPosInt-LoopStart)%(LoopEnd-LoopStart)) + LoopStart; else DataPosInt -= DataSize; } else { State = AL_STOPPED; BufferListItem = ALSource->queue; BuffersPlayed = ALSource->BuffersInQueue; DataPosInt = 0; DataPosFrac = 0; } } } while(State == AL_PLAYING && j < SamplesToDo); /* Update source info */ ALSource->state = State; ALSource->BuffersPlayed = BuffersPlayed; ALSource->position = DataPosInt; ALSource->position_fraction = DataPosFrac; ALSource->Buffer = BufferListItem->buffer; for(i = 0;i < OUTPUTCHANNELS;i++) ALSource->DryGains[i] = DrySend[i]; for(i = 0;i < MAX_SENDS;i++) ALSource->WetGains[i] = WetSend[i]; ALSource->FirstStart = AL_FALSE; if(ALSource->state == AL_PLAYING) pos++; goto next_source; } ALvoid aluMixData(ALCdevice *device, ALvoid *buffer, ALsizei size) { float (*DryBuffer)[OUTPUTCHANNELS]; ALfloat (*Matrix)[OUTPUTCHANNELS]; const ALuint *ChanMap; ALuint SamplesToDo; ALeffectslot *ALEffectSlot; ALCcontext *ALContext; ALfloat samp; int fpuState; ALuint i, j, c; ALsizei e; #if defined(HAVE_FESETROUND) fpuState = fegetround(); fesetround(FE_TOWARDZERO); #elif defined(HAVE__CONTROLFP) fpuState = _controlfp(0, 0); _controlfp(_RC_CHOP, _MCW_RC); #else (void)fpuState; #endif DryBuffer = device->DryBuffer; while(size > 0) { /* Setup variables */ SamplesToDo = min(size, BUFFERSIZE); /* Clear mixing buffer */ memset(DryBuffer, 0, SamplesToDo*OUTPUTCHANNELS*sizeof(ALfloat)); SuspendContext(NULL); for(c = 0;c < device->NumContexts;c++) { ALContext = device->Contexts[c]; SuspendContext(ALContext); MixSomeSources(ALContext, DryBuffer, SamplesToDo); /* effect slot processing */ for(e = 0;e < ALContext->EffectSlotMap.size;e++) { ALEffectSlot = ALContext->EffectSlotMap.array[e].value; if(ALEffectSlot->EffectState) ALEffect_Process(ALEffectSlot->EffectState, ALEffectSlot, SamplesToDo, ALEffectSlot->WetBuffer, DryBuffer); for(i = 0;i < SamplesToDo;i++) ALEffectSlot->WetBuffer[i] = 0.0f; } ProcessContext(ALContext); } device->SamplesPlayed += SamplesToDo; ProcessContext(NULL); //Post processing loop ChanMap = device->DevChannels; Matrix = device->ChannelMatrix; switch(device->Format) { #define CHECK_WRITE_FORMAT(bits, type, func) \ case AL_FORMAT_MONO##bits: \ for(i = 0;i < SamplesToDo;i++) \ { \ samp = 0.0f; \ for(c = 0;c < OUTPUTCHANNELS;c++) \ samp += DryBuffer[i][c] * Matrix[c][FRONT_CENTER]; \ ((type*)buffer)[ChanMap[FRONT_CENTER]] = (func)(samp); \ buffer = ((type*)buffer) + 1; \ } \ break; \ case AL_FORMAT_STEREO##bits: \ if(device->Bs2b) \ { \ for(i = 0;i < SamplesToDo;i++) \ { \ float samples[2] = { 0.0f, 0.0f }; \ for(c = 0;c < OUTPUTCHANNELS;c++) \ { \ samples[0] += DryBuffer[i][c]*Matrix[c][FRONT_LEFT]; \ samples[1] += DryBuffer[i][c]*Matrix[c][FRONT_RIGHT]; \ } \ bs2b_cross_feed(device->Bs2b, samples); \ ((type*)buffer)[ChanMap[FRONT_LEFT]] = (func)(samples[0]);\ ((type*)buffer)[ChanMap[FRONT_RIGHT]]= (func)(samples[1]);\ buffer = ((type*)buffer) + 2; \ } \ } \ else \ { \ for(i = 0;i < SamplesToDo;i++) \ { \ static const Channel chans[] = { \ FRONT_LEFT, FRONT_RIGHT \ }; \ for(j = 0;j < 2;j++) \ { \ samp = 0.0f; \ for(c = 0;c < OUTPUTCHANNELS;c++) \ samp += DryBuffer[i][c] * Matrix[c][chans[j]]; \ ((type*)buffer)[ChanMap[chans[j]]] = (func)(samp); \ } \ buffer = ((type*)buffer) + 2; \ } \ } \ break; \ case AL_FORMAT_QUAD##bits: \ for(i = 0;i < SamplesToDo;i++) \ { \ static const Channel chans[] = { \ FRONT_LEFT, FRONT_RIGHT, \ BACK_LEFT, BACK_RIGHT, \ }; \ for(j = 0;j < 4;j++) \ { \ samp = 0.0f; \ for(c = 0;c < OUTPUTCHANNELS;c++) \ samp += DryBuffer[i][c] * Matrix[c][chans[j]]; \ ((type*)buffer)[ChanMap[chans[j]]] = (func)(samp); \ } \ buffer = ((type*)buffer) + 4; \ } \ break; \ case AL_FORMAT_51CHN##bits: \ for(i = 0;i < SamplesToDo;i++) \ { \ static const Channel chans[] = { \ FRONT_LEFT, FRONT_RIGHT, \ FRONT_CENTER, LFE, \ BACK_LEFT, BACK_RIGHT, \ }; \ for(j = 0;j < 6;j++) \ { \ samp = 0.0f; \ for(c = 0;c < OUTPUTCHANNELS;c++) \ samp += DryBuffer[i][c] * Matrix[c][chans[j]]; \ ((type*)buffer)[ChanMap[chans[j]]] = (func)(samp); \ } \ buffer = ((type*)buffer) + 6; \ } \ break; \ case AL_FORMAT_61CHN##bits: \ for(i = 0;i < SamplesToDo;i++) \ { \ static const Channel chans[] = { \ FRONT_LEFT, FRONT_RIGHT, \ FRONT_CENTER, LFE, BACK_CENTER, \ SIDE_LEFT, SIDE_RIGHT, \ }; \ for(j = 0;j < 7;j++) \ { \ samp = 0.0f; \ for(c = 0;c < OUTPUTCHANNELS;c++) \ samp += DryBuffer[i][c] * Matrix[c][chans[j]]; \ ((type*)buffer)[ChanMap[chans[j]]] = (func)(samp); \ } \ buffer = ((type*)buffer) + 7; \ } \ break; \ case AL_FORMAT_71CHN##bits: \ for(i = 0;i < SamplesToDo;i++) \ { \ static const Channel chans[] = { \ FRONT_LEFT, FRONT_RIGHT, \ FRONT_CENTER, LFE, \ BACK_LEFT, BACK_RIGHT, \ SIDE_LEFT, SIDE_RIGHT \ }; \ for(j = 0;j < 8;j++) \ { \ samp = 0.0f; \ for(c = 0;c < OUTPUTCHANNELS;c++) \ samp += DryBuffer[i][c] * Matrix[c][chans[j]]; \ ((type*)buffer)[ChanMap[chans[j]]] = (func)(samp); \ } \ buffer = ((type*)buffer) + 8; \ } \ break; #define AL_FORMAT_MONO32 AL_FORMAT_MONO_FLOAT32 #define AL_FORMAT_STEREO32 AL_FORMAT_STEREO_FLOAT32 CHECK_WRITE_FORMAT(8, ALubyte, aluF2UB) CHECK_WRITE_FORMAT(16, ALshort, aluF2S) CHECK_WRITE_FORMAT(32, ALfloat, aluF2F) #undef AL_FORMAT_STEREO32 #undef AL_FORMAT_MONO32 #undef CHECK_WRITE_FORMAT default: break; } size -= SamplesToDo; } #if defined(HAVE_FESETROUND) fesetround(fpuState); #elif defined(HAVE__CONTROLFP) _controlfp(fpuState, 0xfffff); #endif } ALvoid aluHandleDisconnect(ALCdevice *device) { ALuint i; SuspendContext(NULL); for(i = 0;i < device->NumContexts;i++) { ALCcontext *Context = device->Contexts[i]; ALsource *source; ALsizei pos; SuspendContext(Context); for(pos = 0;pos < Context->SourceMap.size;pos++) { source = Context->SourceMap.array[pos].value; if(source->state == AL_PLAYING) { source->state = AL_STOPPED; source->BuffersPlayed = source->BuffersInQueue; source->position = 0; source->position_fraction = 0; } } ProcessContext(Context); } device->Connected = ALC_FALSE; ProcessContext(NULL); }