/** * 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 "alListener.h" #include "alAuxEffectSlot.h" #include "alu.h" #include "bs2b.h" static __inline ALfloat aluF2F(ALfloat Value) { return Value; } static __inline ALshort aluF2S(ALfloat Value) { ALint i; if(Value <= -1.0f) i = -32768; else if(Value >= 1.0f) i = 32767; else i = (ALint)(Value*32767.0f); return ((ALshort)i); } static __inline ALubyte aluF2UB(ALfloat Value) { ALshort i = aluF2S(Value); return (i>>8)+128; } static __inline ALfloat point32(ALfloat val1, ALfloat val2, ALint frac) { return val1; (void)val2; (void)frac; } static __inline ALfloat lerp32(ALfloat val1, ALfloat val2, ALint frac) { return val1 + ((val2-val1)*(frac * (1.0f/(1<DryBuffer; \ ClickRemoval = Device->ClickRemoval; \ PendingClicks = Device->PendingClicks; \ DryFilter = &Source->Params.iirFilter; \ for(i = 0;i < OUTPUTCHANNELS;i++) \ DrySend[i] = Source->Params.DryGains[i]; \ \ if(j == 0) \ { \ value = sampler##S(Data.p##S[pos], Data.p##S[pos+1], frac); \ \ value = lpFilter4PC(DryFilter, 0, value); \ ClickRemoval[FRONT_LEFT] -= value*DrySend[FRONT_LEFT]; \ ClickRemoval[FRONT_RIGHT] -= value*DrySend[FRONT_RIGHT]; \ ClickRemoval[SIDE_LEFT] -= value*DrySend[SIDE_LEFT]; \ ClickRemoval[SIDE_RIGHT] -= value*DrySend[SIDE_RIGHT]; \ ClickRemoval[BACK_LEFT] -= value*DrySend[BACK_LEFT]; \ ClickRemoval[BACK_RIGHT] -= value*DrySend[BACK_RIGHT]; \ ClickRemoval[FRONT_CENTER] -= value*DrySend[FRONT_CENTER]; \ ClickRemoval[BACK_CENTER] -= value*DrySend[BACK_CENTER]; \ } \ for(BufferIdx = 0;BufferIdx < BufferSize;BufferIdx++) \ { \ /* First order interpolator */ \ value = sampler##S(Data.p##S[pos], Data.p##S[pos+1], frac); \ \ /* Direct path final mix buffer and panning */ \ value = lpFilter4P(DryFilter, 0, value); \ DryBuffer[j][FRONT_LEFT] += value*DrySend[FRONT_LEFT]; \ DryBuffer[j][FRONT_RIGHT] += value*DrySend[FRONT_RIGHT]; \ DryBuffer[j][SIDE_LEFT] += value*DrySend[SIDE_LEFT]; \ DryBuffer[j][SIDE_RIGHT] += value*DrySend[SIDE_RIGHT]; \ DryBuffer[j][BACK_LEFT] += value*DrySend[BACK_LEFT]; \ DryBuffer[j][BACK_RIGHT] += value*DrySend[BACK_RIGHT]; \ DryBuffer[j][FRONT_CENTER] += value*DrySend[FRONT_CENTER]; \ DryBuffer[j][BACK_CENTER] += value*DrySend[BACK_CENTER]; \ \ frac += increment; \ pos += frac>>FRACTIONBITS; \ frac &= FRACTIONMASK; \ j++; \ } \ if(j == SamplesToDo) \ { \ ALuint p = pos; \ ALuint f = frac; \ if(p >= LoopEnd) \ { \ ALuint64 pos64 = pos; \ pos64 <<= FRACTIONBITS; \ pos64 += frac; \ pos64 -= increment; \ p = pos64>>FRACTIONBITS; \ f = pos64&FRACTIONMASK; \ } \ value = sampler##S(Data.p##S[p], Data.p##S[p+1], f); \ \ value = lpFilter4PC(DryFilter, 0, value); \ PendingClicks[FRONT_LEFT] += value*DrySend[FRONT_LEFT]; \ PendingClicks[FRONT_RIGHT] += value*DrySend[FRONT_RIGHT]; \ PendingClicks[SIDE_LEFT] += value*DrySend[SIDE_LEFT]; \ PendingClicks[SIDE_RIGHT] += value*DrySend[SIDE_RIGHT]; \ PendingClicks[BACK_LEFT] += value*DrySend[BACK_LEFT]; \ PendingClicks[BACK_RIGHT] += value*DrySend[BACK_RIGHT]; \ PendingClicks[FRONT_CENTER] += value*DrySend[FRONT_CENTER]; \ PendingClicks[BACK_CENTER] += value*DrySend[BACK_CENTER]; \ } \ \ for(out = 0;out < MAX_SENDS;out++) \ { \ ALfloat WetSend; \ ALfloat *WetBuffer; \ ALfloat *WetClickRemoval; \ ALfloat *WetPendingClicks; \ FILTER *WetFilter; \ \ if(!Source->Send[out].Slot || \ Source->Send[out].Slot->effect.type == AL_EFFECT_NULL) \ continue; \ \ WetSend = Source->Params.WetGains[out]; \ WetBuffer = Source->Send[out].Slot->WetBuffer; \ WetClickRemoval = Source->Send[out].Slot->ClickRemoval; \ WetPendingClicks = Source->Send[out].Slot->PendingClicks; \ WetFilter = &Source->Params.Send[out].iirFilter; \ \ pos = DataPosInt; \ frac = DataPosFrac; \ j -= BufferSize; \ \ if(j == 0) \ { \ value = sampler##S(Data.p##S[pos], Data.p##S[pos+1], frac); \ \ value = lpFilter2PC(WetFilter, 0, value); \ WetClickRemoval[0] -= value*WetSend; \ } \ for(BufferIdx = 0;BufferIdx < BufferSize;BufferIdx++) \ { \ /* First order interpolator */ \ value = sampler##S(Data.p##S[pos], Data.p##S[pos+1], frac); \ \ /* Room path final mix buffer and panning */ \ value = lpFilter2P(WetFilter, 0, value); \ WetBuffer[j] += value*WetSend; \ \ frac += increment; \ pos += frac>>FRACTIONBITS; \ frac &= FRACTIONMASK; \ j++; \ } \ if(j == SamplesToDo) \ { \ ALuint p = pos; \ ALuint f = frac; \ if(p >= LoopEnd) \ { \ ALuint64 pos64 = pos; \ pos64 <<= FRACTIONBITS; \ pos64 += frac; \ pos64 -= increment; \ p = pos64>>FRACTIONBITS; \ f = pos64&FRACTIONMASK; \ } \ value = sampler##S(Data.p##S[p], Data.p##S[p+1], f); \ \ value = lpFilter2PC(WetFilter, 0, value); \ WetPendingClicks[0] += value*WetSend; \ } \ } \ DataPosInt = pos; \ DataPosFrac = frac; \ } while(0) #define DO_MIX_STEREO(S,sampler) do { \ const ALfloat scaler = 1.0f/Channels; \ ALfloat (*DryBuffer)[OUTPUTCHANNELS]; \ ALfloat *ClickRemoval, *PendingClicks; \ ALuint pos = DataPosInt; \ ALuint frac = DataPosFrac; \ ALfloat DrySend[OUTPUTCHANNELS]; \ FILTER *DryFilter; \ ALuint BufferIdx; \ ALuint i, out; \ ALfloat value; \ \ DryBuffer = Device->DryBuffer; \ ClickRemoval = Device->ClickRemoval; \ PendingClicks = Device->PendingClicks; \ DryFilter = &Source->Params.iirFilter; \ for(i = 0;i < OUTPUTCHANNELS;i++) \ DrySend[i] = Source->Params.DryGains[i]; \ \ if(j == 0) \ { \ for(i = 0;i < Channels;i++) \ { \ value = sampler##S(Data.p##S[pos*Channels + i], \ Data.p##S[(pos+1)*Channels + i], frac); \ \ value = lpFilter2PC(DryFilter, chans[i]*2, value); \ ClickRemoval[chans[i+0]] -= value*DrySend[chans[i+0]]; \ ClickRemoval[chans[i+2]] -= value*DrySend[chans[i+2]]; \ ClickRemoval[chans[i+4]] -= value*DrySend[chans[i+4]]; \ } \ } \ for(BufferIdx = 0;BufferIdx < BufferSize;BufferIdx++) \ { \ for(i = 0;i < Channels;i++) \ { \ value = sampler##S(Data.p##S[pos*Channels + i], \ Data.p##S[(pos+1)*Channels + i], frac); \ \ value = lpFilter2P(DryFilter, chans[i]*2, value); \ DryBuffer[j][chans[i+0]] += value*DrySend[chans[i+0]]; \ DryBuffer[j][chans[i+2]] += value*DrySend[chans[i+2]]; \ DryBuffer[j][chans[i+4]] += value*DrySend[chans[i+4]]; \ } \ \ frac += increment; \ pos += frac>>FRACTIONBITS; \ frac &= FRACTIONMASK; \ j++; \ } \ if(j == SamplesToDo) \ { \ ALuint p = pos; \ ALuint f = frac; \ if(p >= LoopEnd) \ { \ ALuint64 pos64 = pos; \ pos64 <<= FRACTIONBITS; \ pos64 += frac; \ pos64 -= increment; \ p = pos64>>FRACTIONBITS; \ f = pos64&FRACTIONMASK; \ } \ for(i = 0;i < Channels;i++) \ { \ value = sampler##S(Data.p##S[p*Channels + i], \ Data.p##S[(p+1)*Channels + i], f); \ \ value = lpFilter2PC(DryFilter, chans[i]*2, value); \ PendingClicks[chans[i+0]] += value*DrySend[chans[i+0]]; \ PendingClicks[chans[i+2]] += value*DrySend[chans[i+2]]; \ PendingClicks[chans[i+4]] += value*DrySend[chans[i+4]]; \ } \ } \ \ for(out = 0;out < MAX_SENDS;out++) \ { \ ALfloat WetSend; \ ALfloat *WetBuffer; \ ALfloat *WetClickRemoval; \ ALfloat *WetPendingClicks; \ FILTER *WetFilter; \ \ if(!Source->Send[out].Slot || \ Source->Send[out].Slot->effect.type == AL_EFFECT_NULL) \ continue; \ \ WetSend = Source->Params.WetGains[out]; \ WetBuffer = Source->Send[out].Slot->WetBuffer; \ WetClickRemoval = Source->Send[out].Slot->ClickRemoval; \ WetPendingClicks = Source->Send[out].Slot->PendingClicks; \ WetFilter = &Source->Params.Send[out].iirFilter; \ \ pos = DataPosInt; \ frac = DataPosFrac; \ j -= BufferSize; \ \ if(j == 0) \ { \ for(i = 0;i < Channels;i++) \ { \ value = sampler##S(Data.p##S[pos*Channels + i], \ Data.p##S[(pos+1)*Channels + i], frac); \ \ value = lpFilter1PC(WetFilter, chans[i], value); \ WetClickRemoval[0] -= value*WetSend * scaler; \ } \ } \ for(BufferIdx = 0;BufferIdx < BufferSize;BufferIdx++) \ { \ for(i = 0;i < Channels;i++) \ { \ value = sampler##S(Data.p##S[pos*Channels + i], \ Data.p##S[(pos+1)*Channels + i], frac); \ \ value = lpFilter1P(WetFilter, chans[i], value); \ WetBuffer[j] += value*WetSend * scaler; \ } \ \ frac += increment; \ pos += frac>>FRACTIONBITS; \ frac &= FRACTIONMASK; \ j++; \ } \ if(j == SamplesToDo) \ { \ ALuint p = pos; \ ALuint f = frac; \ if(p >= LoopEnd) \ { \ ALuint64 pos64 = pos; \ pos64 <<= FRACTIONBITS; \ pos64 += frac; \ pos64 -= increment; \ p = pos64>>FRACTIONBITS; \ f = pos64&FRACTIONMASK; \ } \ for(i = 0;i < Channels;i++) \ { \ value = sampler##S(Data.p##S[p*Channels + i], \ Data.p##S[(p+1)*Channels + i], f); \ \ value = lpFilter1PC(WetFilter, chans[i], value); \ WetPendingClicks[0] += value*WetSend * scaler; \ } \ } \ } \ DataPosInt = pos; \ DataPosFrac = frac; \ } while(0) #define DO_MIX_MC(S,sampler) do { \ const ALfloat scaler = 1.0f/Channels; \ ALfloat (*DryBuffer)[OUTPUTCHANNELS]; \ ALfloat *ClickRemoval, *PendingClicks; \ ALuint pos = DataPosInt; \ ALuint frac = DataPosFrac; \ ALfloat DrySend[OUTPUTCHANNELS]; \ FILTER *DryFilter; \ ALuint BufferIdx; \ ALuint i, out; \ ALfloat value; \ \ DryBuffer = Device->DryBuffer; \ ClickRemoval = Device->ClickRemoval; \ PendingClicks = Device->PendingClicks; \ DryFilter = &Source->Params.iirFilter; \ for(i = 0;i < OUTPUTCHANNELS;i++) \ DrySend[i] = Source->Params.DryGains[i]; \ \ if(j == 0) \ { \ for(i = 0;i < Channels;i++) \ { \ value = sampler##S(Data.p##S[pos*Channels + i], \ Data.p##S[(pos+1)*Channels + i], frac); \ \ value = lpFilter2PC(DryFilter, chans[i]*2, value); \ ClickRemoval[chans[i]] -= value*DrySend[chans[i]]; \ } \ } \ for(BufferIdx = 0;BufferIdx < BufferSize;BufferIdx++) \ { \ for(i = 0;i < Channels;i++) \ { \ value = sampler##S(Data.p##S[pos*Channels + i], \ Data.p##S[(pos+1)*Channels + i], frac); \ \ value = lpFilter2P(DryFilter, chans[i]*2, value); \ DryBuffer[j][chans[i]] += value*DrySend[chans[i]]; \ } \ \ frac += increment; \ pos += frac>>FRACTIONBITS; \ frac &= FRACTIONMASK; \ j++; \ } \ if(j == SamplesToDo) \ { \ ALuint p = pos; \ ALuint f = frac; \ if(p >= LoopEnd) \ { \ ALuint64 pos64 = pos; \ pos64 <<= FRACTIONBITS; \ pos64 += frac; \ pos64 -= increment; \ p = pos64>>FRACTIONBITS; \ f = pos64&FRACTIONMASK; \ } \ for(i = 0;i < Channels;i++) \ { \ value = sampler##S(Data.p##S[p*Channels + i], \ Data.p##S[(p+1)*Channels + i], f); \ \ value = lpFilter2PC(DryFilter, chans[i]*2, value); \ PendingClicks[chans[i]] += value*DrySend[chans[i]]; \ } \ } \ \ for(out = 0;out < MAX_SENDS;out++) \ { \ ALfloat WetSend; \ ALfloat *WetBuffer; \ ALfloat *WetClickRemoval; \ ALfloat *WetPendingClicks; \ FILTER *WetFilter; \ \ if(!Source->Send[out].Slot || \ Source->Send[out].Slot->effect.type == AL_EFFECT_NULL) \ continue; \ \ WetSend = Source->Params.WetGains[out]; \ WetBuffer = Source->Send[out].Slot->WetBuffer; \ WetClickRemoval = Source->Send[out].Slot->ClickRemoval; \ WetPendingClicks = Source->Send[out].Slot->PendingClicks; \ WetFilter = &Source->Params.Send[out].iirFilter; \ \ pos = DataPosInt; \ frac = DataPosFrac; \ j -= BufferSize; \ \ if(j == 0) \ { \ for(i = 0;i < Channels;i++) \ { \ value = sampler##S(Data.p##S[pos*Channels + i], \ Data.p##S[(pos+1)*Channels + i], frac); \ \ value = lpFilter1PC(WetFilter, chans[i], value); \ WetClickRemoval[0] -= value*WetSend * scaler; \ } \ } \ for(BufferIdx = 0;BufferIdx < BufferSize;BufferIdx++) \ { \ for(i = 0;i < Channels;i++) \ { \ value = sampler##S(Data.p##S[pos*Channels + i], \ Data.p##S[(pos+1)*Channels + i], frac); \ \ value = lpFilter1P(WetFilter, chans[i], value); \ WetBuffer[j] += value*WetSend * scaler; \ } \ \ frac += increment; \ pos += frac>>FRACTIONBITS; \ frac &= FRACTIONMASK; \ j++; \ } \ if(j == SamplesToDo) \ { \ ALuint p = pos; \ ALuint f = frac; \ if(p >= LoopEnd) \ { \ ALuint64 pos64 = pos; \ pos64 <<= FRACTIONBITS; \ pos64 += frac; \ pos64 -= increment; \ p = pos64>>FRACTIONBITS; \ f = pos64&FRACTIONMASK; \ } \ for(i = 0;i < Channels;i++) \ { \ value = sampler##S(Data.p##S[p*Channels + i], \ Data.p##S[(p+1)*Channels + i], f); \ \ value = lpFilter1PC(WetFilter, chans[i], value); \ WetPendingClicks[0] += value*WetSend * scaler; \ } \ } \ } \ DataPosInt = pos; \ DataPosFrac = frac; \ } while(0) #define MIX_MONO(S) do { \ switch(Source->Resampler) \ { \ case POINT_RESAMPLER: \ DO_MIX_MONO(S,point); break; \ case LINEAR_RESAMPLER: \ DO_MIX_MONO(S,lerp); break; \ case COSINE_RESAMPLER: \ DO_MIX_MONO(S,cos_lerp); break; \ case RESAMPLER_MIN: \ case RESAMPLER_MAX: \ break; \ } \ } while(0) #define MIX_STEREO(S) do { \ const int chans[] = { \ FRONT_LEFT, FRONT_RIGHT, \ SIDE_LEFT, SIDE_RIGHT, \ BACK_LEFT, BACK_RIGHT \ }; \ \ switch(Source->Resampler) \ { \ case POINT_RESAMPLER: \ DO_MIX_STEREO(S,point); break; \ case LINEAR_RESAMPLER: \ DO_MIX_STEREO(S,lerp); break; \ case COSINE_RESAMPLER: \ DO_MIX_STEREO(S,cos_lerp); break; \ case RESAMPLER_MIN: \ case RESAMPLER_MAX: \ break; \ } \ } while(0) #define MIX_MC(S,...) do { \ const int chans[] = { __VA_ARGS__ }; \ \ switch(Source->Resampler) \ { \ case POINT_RESAMPLER: \ DO_MIX_MC(S,point); break; \ case LINEAR_RESAMPLER: \ DO_MIX_MC(S,lerp); break; \ case COSINE_RESAMPLER: \ DO_MIX_MC(S,cos_lerp); break; \ case RESAMPLER_MIN: \ case RESAMPLER_MAX: \ break; \ } \ } while(0) #define MIX(S) do { \ if(Channels == 1) /* Mono */ \ MIX_MONO(S); \ else if(Channels == 2) /* Stereo */ \ MIX_STEREO(S); \ else if(Channels == 4) /* Quad */ \ MIX_MC(S, FRONT_LEFT, FRONT_RIGHT, \ BACK_LEFT, BACK_RIGHT); \ else if(Channels == 6) /* 5.1 */ \ MIX_MC(S, FRONT_LEFT, FRONT_RIGHT, \ FRONT_CENTER, LFE, \ BACK_LEFT, BACK_RIGHT); \ else if(Channels == 7) /* 6.1 */ \ MIX_MC(S, FRONT_LEFT, FRONT_RIGHT, \ FRONT_CENTER, LFE, \ BACK_CENTER, \ SIDE_LEFT, SIDE_RIGHT); \ else if(Channels == 8) /* 7.1 */ \ MIX_MC(S, FRONT_LEFT, FRONT_RIGHT, \ FRONT_CENTER, LFE, \ BACK_LEFT, BACK_RIGHT, \ SIDE_LEFT, SIDE_RIGHT); \ } while(0) ALvoid MixSource(ALsource *Source, ALCdevice *Device, ALuint SamplesToDo) { ALbufferlistitem *BufferListItem; ALint64 DataSize64,DataPos64; ALint increment; ALuint DataPosInt, DataPosFrac; ALuint BuffersPlayed; ALboolean Looping; ALenum State; ALuint i, j; /* Get source info */ State = Source->state; BuffersPlayed = Source->BuffersPlayed; DataPosInt = Source->position; DataPosFrac = Source->position_fraction; Looping = Source->bLooping; /* Get fixed point step */ increment = Source->Params.Step; /* Get current buffer queue item */ BufferListItem = Source->queue; for(i = 0;i < BuffersPlayed;i++) BufferListItem = BufferListItem->next; j = 0; do { const ALbuffer *ALBuffer; union { ALfloat *p32; ALshort *p16; ALubyte *p8; } Data = { NULL }; ALuint DataSize = 0; ALuint LoopStart = 0; ALuint LoopEnd = 0; ALuint Channels, Bytes; ALuint BufferSize; /* Get buffer info */ if((ALBuffer=BufferListItem->buffer) != NULL) { Data.p8 = ALBuffer->data; DataSize = ALBuffer->size; DataSize /= aluFrameSizeFromFormat(ALBuffer->format); Channels = aluChannelsFromFormat(ALBuffer->format); Bytes = aluBytesFromFormat(ALBuffer->format); LoopStart = 0; LoopEnd = DataSize; if(Looping && Source->lSourceType == AL_STATIC) { /* If current pos is beyond the loop range, do not loop */ if(DataPosInt >= LoopEnd) Looping = AL_FALSE; else { LoopStart = ALBuffer->LoopStart; LoopEnd = ALBuffer->LoopEnd; } } } 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.p8[DataSize*Channels*Bytes], NextBuf->data, ulExtraSamples); } } else if(Looping) { ALbuffer *NextBuf = Source->queue->buffer; if(NextBuf && NextBuf->size) { ALint ulExtraSamples = BUFFER_PADDING*Channels*Bytes; ulExtraSamples = min(NextBuf->size, ulExtraSamples); memcpy(&Data.p8[DataSize*Channels*Bytes], &((ALubyte*)NextBuf->data)[LoopStart*Channels*Bytes], ulExtraSamples); } } else memset(&Data.p8[DataSize*Channels*Bytes], 0, (BUFFER_PADDING*Channels*Bytes)); /* 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)); if(Bytes == 4) /* 32-bit float */ MIX(32); else if(Bytes == 2) /* signed 16-bit */ MIX(16); skipmix: /* Handle looping sources */ if(DataPosInt >= LoopEnd) { if(BufferListItem->next) { BufferListItem = BufferListItem->next; BuffersPlayed++; DataPosInt -= DataSize; } else if(Looping) { BufferListItem = Source->queue; BuffersPlayed = 0; if(Source->lSourceType == AL_STATIC) DataPosInt = ((DataPosInt-LoopStart)%(LoopEnd-LoopStart)) + LoopStart; else DataPosInt -= DataSize; } else { State = AL_STOPPED; BufferListItem = Source->queue; BuffersPlayed = Source->BuffersInQueue; DataPosInt = 0; DataPosFrac = 0; } } } while(State == AL_PLAYING && j < SamplesToDo); /* Update source info */ Source->state = State; Source->BuffersPlayed = BuffersPlayed; Source->position = DataPosInt; Source->position_fraction = DataPosFrac; Source->Buffer = BufferListItem->buffer; } ALvoid aluMixData(ALCdevice *device, ALvoid *buffer, ALsizei size) { ALuint SamplesToDo; ALeffectslot *ALEffectSlot; ALCcontext **ctx, **ctx_end; ALsource **src, **src_end; 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 while(size > 0) { /* Setup variables */ SamplesToDo = min(size, BUFFERSIZE); /* Clear mixing buffer */ memset(device->DryBuffer, 0, SamplesToDo*OUTPUTCHANNELS*sizeof(ALfloat)); SuspendContext(NULL); ctx = device->Contexts; ctx_end = ctx + device->NumContexts; while(ctx != ctx_end) { SuspendContext(*ctx); src = (*ctx)->ActiveSources; src_end = src + (*ctx)->ActiveSourceCount; while(src != src_end) { if((*src)->state != AL_PLAYING) { --((*ctx)->ActiveSourceCount); *src = *(--src_end); continue; } if((*src)->NeedsUpdate) { ALsource_Update(*src, *ctx); (*src)->NeedsUpdate = AL_FALSE; } ALsource_Mix(*src, device, SamplesToDo); src++; } /* effect slot processing */ for(e = 0;e < (*ctx)->EffectSlotMap.size;e++) { ALEffectSlot = (*ctx)->EffectSlotMap.array[e].value; for(i = 0;i < SamplesToDo;i++) { ALEffectSlot->ClickRemoval[0] -= ALEffectSlot->ClickRemoval[0] / 256.0f; ALEffectSlot->WetBuffer[i] += ALEffectSlot->ClickRemoval[0]; } for(i = 0;i < 1;i++) { ALEffectSlot->ClickRemoval[i] += ALEffectSlot->PendingClicks[i]; ALEffectSlot->PendingClicks[i] = 0.0f; } ALEffect_Process(ALEffectSlot->EffectState, ALEffectSlot, SamplesToDo, ALEffectSlot->WetBuffer, device->DryBuffer); for(i = 0;i < SamplesToDo;i++) ALEffectSlot->WetBuffer[i] = 0.0f; } ProcessContext(*ctx); ctx++; } device->SamplesPlayed += SamplesToDo; ProcessContext(NULL); //Post processing loop for(i = 0;i < SamplesToDo;i++) { for(c = 0;c < OUTPUTCHANNELS;c++) { device->ClickRemoval[c] -= device->ClickRemoval[c] / 256.0f; device->DryBuffer[i][c] += device->ClickRemoval[c]; } } for(i = 0;i < OUTPUTCHANNELS;i++) { device->ClickRemoval[i] += device->PendingClicks[i]; device->PendingClicks[i] = 0.0f; } switch(device->Format) { #define DO_WRITE(T, func, N, ...) do { \ const Channel chans[] = { \ __VA_ARGS__ \ }; \ ALfloat (*DryBuffer)[OUTPUTCHANNELS] = device->DryBuffer; \ ALfloat (*Matrix)[OUTPUTCHANNELS] = device->ChannelMatrix; \ const ALuint *ChanMap = device->DevChannels; \ \ for(i = 0;i < SamplesToDo;i++) \ { \ for(j = 0;j < N;j++) \ { \ samp = 0.0f; \ for(c = 0;c < OUTPUTCHANNELS;c++) \ samp += DryBuffer[i][c] * Matrix[c][chans[j]]; \ ((T*)buffer)[ChanMap[chans[j]]] = func(samp); \ } \ buffer = ((T*)buffer) + N; \ } \ } while(0) #define CHECK_WRITE_FORMAT(bits, T, func) \ case AL_FORMAT_MONO##bits: \ DO_WRITE(T, func, 1, FRONT_CENTER); \ break; \ case AL_FORMAT_STEREO##bits: \ if(device->Bs2b) \ { \ ALfloat (*DryBuffer)[OUTPUTCHANNELS] = device->DryBuffer; \ ALfloat (*Matrix)[OUTPUTCHANNELS] = device->ChannelMatrix; \ const ALuint *ChanMap = device->DevChannels; \ \ 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); \ ((T*)buffer)[ChanMap[FRONT_LEFT]] = func(samples[0]); \ ((T*)buffer)[ChanMap[FRONT_RIGHT]] = func(samples[1]); \ buffer = ((T*)buffer) + 2; \ } \ } \ else \ DO_WRITE(T, func, 2, FRONT_LEFT, FRONT_RIGHT); \ break; \ case AL_FORMAT_QUAD##bits: \ DO_WRITE(T, func, 4, FRONT_LEFT, FRONT_RIGHT, \ BACK_LEFT, BACK_RIGHT); \ break; \ case AL_FORMAT_51CHN##bits: \ DO_WRITE(T, func, 6, FRONT_LEFT, FRONT_RIGHT, \ FRONT_CENTER, LFE, \ BACK_LEFT, BACK_RIGHT); \ break; \ case AL_FORMAT_61CHN##bits: \ DO_WRITE(T, func, 7, FRONT_LEFT, FRONT_RIGHT, \ FRONT_CENTER, LFE, BACK_CENTER, \ SIDE_LEFT, SIDE_RIGHT); \ break; \ case AL_FORMAT_71CHN##bits: \ DO_WRITE(T, func, 8, FRONT_LEFT, FRONT_RIGHT, \ FRONT_CENTER, LFE, \ BACK_LEFT, BACK_RIGHT, \ SIDE_LEFT, SIDE_RIGHT); \ 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 #undef DO_WRITE default: break; } size -= SamplesToDo; } #if defined(HAVE_FESETROUND) fesetround(fpuState); #elif defined(HAVE__CONTROLFP) _controlfp(fpuState, 0xfffff); #endif }