/** * 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 ALdouble point32(const ALfloat *vals, ALint step, ALint frac) { return vals[0]; (void)step; (void)frac; } static __inline ALdouble lerp32(const ALfloat *vals, ALint step, ALint frac) { return lerp(vals[0], vals[step], frac * (1.0/FRACTIONONE)); } static __inline ALdouble cubic32(const ALfloat *vals, ALint step, ALint frac) { return cubic(vals[-step], vals[0], vals[step], vals[step+step], frac * (1.0/FRACTIONONE)); } static __inline ALdouble point16(const ALshort *vals, ALint step, ALint frac) { return vals[0] * (1.0/32767.0); (void)step; (void)frac; } static __inline ALdouble lerp16(const ALshort *vals, ALint step, ALint frac) { return lerp(vals[0], vals[step], frac * (1.0/FRACTIONONE)) * (1.0/32767.0); } static __inline ALdouble cubic16(const ALshort *vals, ALint step, ALint frac) { return cubic(vals[-step], vals[0], vals[step], vals[step+step], frac * (1.0/FRACTIONONE)) * (1.0/32767.0); } static __inline ALdouble point8(const ALubyte *vals, ALint step, ALint frac) { return (vals[0]-128.0) * (1.0/127.0); (void)step; (void)frac; } static __inline ALdouble lerp8(const ALubyte *vals, ALint step, ALint frac) { return (lerp(vals[0], vals[step], frac * (1.0/FRACTIONONE))-128.0) * (1.0/127.0); } static __inline ALdouble cubic8(const ALubyte *vals, ALint step, ALint frac) { return (cubic(vals[-step], vals[0], vals[step], vals[step+step], frac * (1.0/FRACTIONONE))-128.0) * (1.0/127.0); } #define DECL_TEMPLATE(T, sampler) \ static void Mix_##T##_1_##sampler(ALsource *Source, ALCdevice *Device, \ const T *data, ALuint *DataPosInt, ALuint *DataPosFrac, \ ALuint OutPos, ALuint SamplesToDo, ALuint BufferSize) \ { \ ALfloat (*DryBuffer)[MAXCHANNELS]; \ ALfloat *ClickRemoval, *PendingClicks; \ ALuint pos, frac; \ ALfloat DrySend[MAXCHANNELS]; \ FILTER *DryFilter; \ ALuint BufferIdx; \ ALuint increment; \ ALuint out, c; \ ALfloat value; \ \ increment = Source->Params.Step; \ \ DryBuffer = Device->DryBuffer; \ ClickRemoval = Device->ClickRemoval; \ PendingClicks = Device->PendingClicks; \ DryFilter = &Source->Params.iirFilter; \ for(c = 0;c < MAXCHANNELS;c++) \ DrySend[c] = Source->Params.DryGains[0][c]; \ \ pos = 0; \ frac = *DataPosFrac; \ \ if(OutPos == 0) \ { \ value = sampler(data+pos, 1, frac); \ \ value = lpFilter4PC(DryFilter, 0, value); \ for(c = 0;c < MAXCHANNELS;c++) \ ClickRemoval[c] -= value*DrySend[c]; \ } \ for(BufferIdx = 0;BufferIdx < BufferSize;BufferIdx++) \ { \ /* First order interpolator */ \ value = sampler(data+pos, 1, frac); \ \ /* Direct path final mix buffer and panning */ \ value = lpFilter4P(DryFilter, 0, value); \ for(c = 0;c < MAXCHANNELS;c++) \ DryBuffer[OutPos][c] += value*DrySend[c]; \ \ frac += increment; \ pos += frac>>FRACTIONBITS; \ frac &= FRACTIONMASK; \ OutPos++; \ } \ if(OutPos == SamplesToDo) \ { \ value = sampler(data+pos, 1, frac); \ \ value = lpFilter4PC(DryFilter, 0, value); \ for(c = 0;c < MAXCHANNELS;c++) \ PendingClicks[c] += value*DrySend[c]; \ } \ \ for(out = 0;out < Device->NumAuxSends;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; \ \ WetBuffer = Source->Send[out].Slot->WetBuffer; \ WetClickRemoval = Source->Send[out].Slot->ClickRemoval; \ WetPendingClicks = Source->Send[out].Slot->PendingClicks; \ WetFilter = &Source->Params.Send[out].iirFilter; \ WetSend = Source->Params.Send[out].WetGain; \ \ pos = 0; \ frac = *DataPosFrac; \ OutPos -= BufferSize; \ \ if(OutPos == 0) \ { \ value = sampler(data+pos, 1, frac); \ \ value = lpFilter2PC(WetFilter, 0, value); \ WetClickRemoval[0] -= value*WetSend; \ } \ for(BufferIdx = 0;BufferIdx < BufferSize;BufferIdx++) \ { \ /* First order interpolator */ \ value = sampler(data+pos, 1, frac); \ \ /* Room path final mix buffer and panning */ \ value = lpFilter2P(WetFilter, 0, value); \ WetBuffer[OutPos] += value*WetSend; \ \ frac += increment; \ pos += frac>>FRACTIONBITS; \ frac &= FRACTIONMASK; \ OutPos++; \ } \ if(OutPos == SamplesToDo) \ { \ value = sampler(data+pos, 1, frac); \ \ value = lpFilter2PC(WetFilter, 0, value); \ WetPendingClicks[0] += value*WetSend; \ } \ } \ *DataPosInt += pos; \ *DataPosFrac = frac; \ } DECL_TEMPLATE(ALfloat, point32) DECL_TEMPLATE(ALfloat, lerp32) DECL_TEMPLATE(ALfloat, cubic32) DECL_TEMPLATE(ALshort, point16) DECL_TEMPLATE(ALshort, lerp16) DECL_TEMPLATE(ALshort, cubic16) DECL_TEMPLATE(ALubyte, point8) DECL_TEMPLATE(ALubyte, lerp8) DECL_TEMPLATE(ALubyte, cubic8) #undef DECL_TEMPLATE #define DECL_TEMPLATE(T, chnct, sampler) \ static void Mix_##T##_##chnct##_##sampler(ALsource *Source, ALCdevice *Device,\ const T *data, ALuint *DataPosInt, ALuint *DataPosFrac, \ ALuint OutPos, ALuint SamplesToDo, ALuint BufferSize) \ { \ const ALuint Channels = chnct; \ const ALfloat scaler = 1.0f/chnct; \ ALfloat (*DryBuffer)[MAXCHANNELS]; \ ALfloat *ClickRemoval, *PendingClicks; \ ALuint pos, frac; \ ALfloat DrySend[chnct][MAXCHANNELS]; \ FILTER *DryFilter; \ ALuint BufferIdx; \ ALuint increment; \ ALuint i, out, c; \ ALfloat value; \ \ increment = Source->Params.Step; \ \ DryBuffer = Device->DryBuffer; \ ClickRemoval = Device->ClickRemoval; \ PendingClicks = Device->PendingClicks; \ DryFilter = &Source->Params.iirFilter; \ for(i = 0;i < Channels;i++) \ { \ for(c = 0;c < MAXCHANNELS;c++) \ DrySend[i][c] = Source->Params.DryGains[i][c]; \ } \ \ pos = 0; \ frac = *DataPosFrac; \ \ if(OutPos == 0) \ { \ for(i = 0;i < Channels;i++) \ { \ value = sampler(data + pos*Channels + i, Channels, frac); \ \ value = lpFilter2PC(DryFilter, i*2, value); \ for(c = 0;c < MAXCHANNELS;c++) \ ClickRemoval[c] -= value*DrySend[i][c]; \ } \ } \ for(BufferIdx = 0;BufferIdx < BufferSize;BufferIdx++) \ { \ for(i = 0;i < Channels;i++) \ { \ value = sampler(data + pos*Channels + i, Channels, frac); \ \ value = lpFilter2P(DryFilter, i*2, value); \ for(c = 0;c < MAXCHANNELS;c++) \ DryBuffer[OutPos][c] += value*DrySend[i][c]; \ } \ \ frac += increment; \ pos += frac>>FRACTIONBITS; \ frac &= FRACTIONMASK; \ OutPos++; \ } \ if(OutPos == SamplesToDo) \ { \ for(i = 0;i < Channels;i++) \ { \ value = sampler(data + pos*Channels + i, Channels, frac); \ \ value = lpFilter2PC(DryFilter, i*2, value); \ for(c = 0;c < MAXCHANNELS;c++) \ PendingClicks[c] += value*DrySend[i][c]; \ } \ } \ \ for(out = 0;out < Device->NumAuxSends;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; \ \ WetBuffer = Source->Send[out].Slot->WetBuffer; \ WetClickRemoval = Source->Send[out].Slot->ClickRemoval; \ WetPendingClicks = Source->Send[out].Slot->PendingClicks; \ WetFilter = &Source->Params.Send[out].iirFilter; \ WetSend = Source->Params.Send[out].WetGain; \ \ pos = 0; \ frac = *DataPosFrac; \ OutPos -= BufferSize; \ \ if(OutPos == 0) \ { \ for(i = 0;i < Channels;i++) \ { \ value = sampler(data + pos*Channels + i, Channels, frac); \ \ value = lpFilter1PC(WetFilter, i, value); \ WetClickRemoval[0] -= value*WetSend * scaler; \ } \ } \ for(BufferIdx = 0;BufferIdx < BufferSize;BufferIdx++) \ { \ for(i = 0;i < Channels;i++) \ { \ value = sampler(data + pos*Channels + i, Channels, frac); \ \ value = lpFilter1P(WetFilter, i, value); \ WetBuffer[OutPos] += value*WetSend * scaler; \ } \ \ frac += increment; \ pos += frac>>FRACTIONBITS; \ frac &= FRACTIONMASK; \ OutPos++; \ } \ if(OutPos == SamplesToDo) \ { \ for(i = 0;i < Channels;i++) \ { \ value = sampler(data + pos*Channels + i, Channels, frac); \ \ value = lpFilter1PC(WetFilter, i, value); \ WetPendingClicks[0] += value*WetSend * scaler; \ } \ } \ } \ *DataPosInt += pos; \ *DataPosFrac = frac; \ } DECL_TEMPLATE(ALfloat, 2, point32) DECL_TEMPLATE(ALfloat, 2, lerp32) DECL_TEMPLATE(ALfloat, 2, cubic32) DECL_TEMPLATE(ALshort, 2, point16) DECL_TEMPLATE(ALshort, 2, lerp16) DECL_TEMPLATE(ALshort, 2, cubic16) DECL_TEMPLATE(ALubyte, 2, point8) DECL_TEMPLATE(ALubyte, 2, lerp8) DECL_TEMPLATE(ALubyte, 2, cubic8) DECL_TEMPLATE(ALfloat, 4, point32) DECL_TEMPLATE(ALfloat, 4, lerp32) DECL_TEMPLATE(ALfloat, 4, cubic32) DECL_TEMPLATE(ALshort, 4, point16) DECL_TEMPLATE(ALshort, 4, lerp16) DECL_TEMPLATE(ALshort, 4, cubic16) DECL_TEMPLATE(ALubyte, 4, point8) DECL_TEMPLATE(ALubyte, 4, lerp8) DECL_TEMPLATE(ALubyte, 4, cubic8) DECL_TEMPLATE(ALfloat, 6, point32) DECL_TEMPLATE(ALfloat, 6, lerp32) DECL_TEMPLATE(ALfloat, 6, cubic32) DECL_TEMPLATE(ALshort, 6, point16) DECL_TEMPLATE(ALshort, 6, lerp16) DECL_TEMPLATE(ALshort, 6, cubic16) DECL_TEMPLATE(ALubyte, 6, point8) DECL_TEMPLATE(ALubyte, 6, lerp8) DECL_TEMPLATE(ALubyte, 6, cubic8) DECL_TEMPLATE(ALfloat, 7, point32) DECL_TEMPLATE(ALfloat, 7, lerp32) DECL_TEMPLATE(ALfloat, 7, cubic32) DECL_TEMPLATE(ALshort, 7, point16) DECL_TEMPLATE(ALshort, 7, lerp16) DECL_TEMPLATE(ALshort, 7, cubic16) DECL_TEMPLATE(ALubyte, 7, point8) DECL_TEMPLATE(ALubyte, 7, lerp8) DECL_TEMPLATE(ALubyte, 7, cubic8) DECL_TEMPLATE(ALfloat, 8, point32) DECL_TEMPLATE(ALfloat, 8, lerp32) DECL_TEMPLATE(ALfloat, 8, cubic32) DECL_TEMPLATE(ALshort, 8, point16) DECL_TEMPLATE(ALshort, 8, lerp16) DECL_TEMPLATE(ALshort, 8, cubic16) DECL_TEMPLATE(ALubyte, 8, point8) DECL_TEMPLATE(ALubyte, 8, lerp8) DECL_TEMPLATE(ALubyte, 8, cubic8) #undef DECL_TEMPLATE #define DECL_TEMPLATE(T, sampler) \ static void Mix_##T##_##sampler(ALsource *Source, ALCdevice *Device, \ enum FmtChannels FmtChannels, \ const ALvoid *Data, ALuint *DataPosInt, ALuint *DataPosFrac, \ ALuint OutPos, ALuint SamplesToDo, ALuint BufferSize) \ { \ switch(FmtChannels) \ { \ case FmtMono: \ Mix_##T##_1_##sampler(Source, Device, Data, DataPosInt, DataPosFrac, \ OutPos, SamplesToDo, BufferSize); \ break; \ case FmtStereo: \ case FmtRear: \ Mix_##T##_2_##sampler(Source, Device, Data, DataPosInt, DataPosFrac, \ OutPos, SamplesToDo, BufferSize); \ break; \ case FmtQuad: \ Mix_##T##_4_##sampler(Source, Device, Data, DataPosInt, DataPosFrac, \ OutPos, SamplesToDo, BufferSize); \ break; \ case FmtX51: \ Mix_##T##_6_##sampler(Source, Device, Data, DataPosInt, DataPosFrac, \ OutPos, SamplesToDo, BufferSize); \ break; \ case FmtX61: \ Mix_##T##_7_##sampler(Source, Device, Data, DataPosInt, DataPosFrac, \ OutPos, SamplesToDo, BufferSize); \ break; \ case FmtX71: \ Mix_##T##_8_##sampler(Source, Device, Data, DataPosInt, DataPosFrac, \ OutPos, SamplesToDo, BufferSize); \ break; \ } \ } DECL_TEMPLATE(ALfloat, point32) DECL_TEMPLATE(ALfloat, lerp32) DECL_TEMPLATE(ALfloat, cubic32) DECL_TEMPLATE(ALshort, point16) DECL_TEMPLATE(ALshort, lerp16) DECL_TEMPLATE(ALshort, cubic16) DECL_TEMPLATE(ALubyte, point8) DECL_TEMPLATE(ALubyte, lerp8) DECL_TEMPLATE(ALubyte, cubic8) #undef DECL_TEMPLATE #define DECL_TEMPLATE(sampler) \ static void Mix_##sampler(ALsource *Source, ALCdevice *Device, \ enum FmtChannels FmtChannels, enum FmtType FmtType, \ const ALvoid *Data, ALuint *DataPosInt, ALuint *DataPosFrac, \ ALuint OutPos, ALuint SamplesToDo, ALuint BufferSize) \ { \ switch(FmtType) \ { \ case FmtUByte: \ Mix_ALubyte_##sampler##8(Source, Device, FmtChannels, \ Data, DataPosInt, DataPosFrac, \ OutPos, SamplesToDo, BufferSize); \ break; \ \ case FmtShort: \ Mix_ALshort_##sampler##16(Source, Device, FmtChannels, \ Data, DataPosInt, DataPosFrac, \ OutPos, SamplesToDo, BufferSize); \ break; \ \ case FmtFloat: \ Mix_ALfloat_##sampler##32(Source, Device, FmtChannels, \ Data, DataPosInt, DataPosFrac, \ OutPos, SamplesToDo, BufferSize); \ break; \ } \ } DECL_TEMPLATE(point) DECL_TEMPLATE(lerp) DECL_TEMPLATE(cubic) #undef DECL_TEMPLATE ALvoid MixSource(ALsource *Source, ALCdevice *Device, ALuint SamplesToDo) { ALbufferlistitem *BufferListItem; ALuint DataPosInt, DataPosFrac; enum FmtChannels FmtChannels; enum FmtType FmtType; ALuint BuffersPlayed; ALboolean Looping; ALuint increment; resampler_t Resampler; ALenum State; ALuint OutPos; ALuint FrameSize; ALint64 DataSize64; ALuint i; /* Get source info */ State = Source->state; BuffersPlayed = Source->BuffersPlayed; DataPosInt = Source->position; DataPosFrac = Source->position_fraction; Looping = Source->bLooping; increment = Source->Params.Step; Resampler = (increment == FRACTIONONE) ? POINT_RESAMPLER : Source->Resampler; /* Get buffer info */ FrameSize = 0; FmtChannels = FmtMono; FmtType = FmtUByte; BufferListItem = Source->queue; for(i = 0;i < Source->BuffersInQueue;i++) { const ALbuffer *ALBuffer; if((ALBuffer=BufferListItem->buffer) != NULL) { FmtChannels = ALBuffer->FmtChannels; FmtType = ALBuffer->FmtType; FrameSize = FrameSizeFromFmt(FmtChannels, FmtType); break; } BufferListItem = BufferListItem->next; } /* Get current buffer queue item */ BufferListItem = Source->queue; for(i = 0;i < BuffersPlayed;i++) BufferListItem = BufferListItem->next; OutPos = 0; do { const ALuint BufferPrePadding = ResamplerPrePadding[Resampler]; const ALuint BufferPadding = ResamplerPadding[Resampler]; ALubyte StackData[STACK_DATA_SIZE]; ALubyte *SrcData = StackData; ALuint SrcDataSize = 0; ALuint BufferSize; /* Figure out how many buffer bytes will be needed */ DataSize64 = SamplesToDo-OutPos+1; DataSize64 *= increment; DataSize64 += DataPosFrac+FRACTIONMASK; DataSize64 >>= FRACTIONBITS; DataSize64 += BufferPadding+BufferPrePadding; DataSize64 *= FrameSize; BufferSize = min(DataSize64, STACK_DATA_SIZE); BufferSize -= BufferSize%FrameSize; if(Source->lSourceType == AL_STATIC) { const ALbuffer *ALBuffer = Source->Buffer; const ALubyte *Data = ALBuffer->data; ALuint DataSize; ALuint pos; /* If current pos is beyond the loop range, do not loop */ if(Looping == AL_FALSE || DataPosInt >= (ALuint)ALBuffer->LoopEnd) { Looping = AL_FALSE; if(DataPosInt >= BufferPrePadding) pos = (DataPosInt-BufferPrePadding)*FrameSize; else { DataSize = (BufferPrePadding-DataPosInt)*FrameSize; DataSize = min(BufferSize, DataSize); memset(&SrcData[SrcDataSize], (FmtType==FmtUByte)?0x80:0, DataSize); SrcDataSize += DataSize; BufferSize -= DataSize; pos = 0; } /* Copy what's left to play in the source buffer, and clear the * rest of the temp buffer */ DataSize = ALBuffer->size - pos; DataSize = min(BufferSize, DataSize); memcpy(&SrcData[SrcDataSize], &Data[pos], DataSize); SrcDataSize += DataSize; BufferSize -= DataSize; memset(&SrcData[SrcDataSize], (FmtType==FmtUByte)?0x80:0, BufferSize); SrcDataSize += BufferSize; BufferSize -= BufferSize; } else { ALuint LoopStart = ALBuffer->LoopStart; ALuint LoopEnd = ALBuffer->LoopEnd; if(DataPosInt >= LoopStart) { pos = DataPosInt-LoopStart; while(pos < BufferPrePadding) pos += LoopEnd-LoopStart; pos -= BufferPrePadding; pos += LoopStart; pos *= FrameSize; } else if(DataPosInt >= BufferPrePadding) pos = (DataPosInt-BufferPrePadding)*FrameSize; else { DataSize = (BufferPrePadding-DataPosInt)*FrameSize; DataSize = min(BufferSize, DataSize); memset(&SrcData[SrcDataSize], (FmtType==FmtUByte)?0x80:0, DataSize); SrcDataSize += DataSize; BufferSize -= DataSize; pos = 0; } /* Copy what's left of this loop iteration, then copy repeats * of the loop section */ DataSize = LoopEnd*FrameSize - pos; DataSize = min(BufferSize, DataSize); memcpy(&SrcData[SrcDataSize], &Data[pos], DataSize); SrcDataSize += DataSize; BufferSize -= DataSize; DataSize = (LoopEnd-LoopStart) * FrameSize; while(BufferSize > 0) { DataSize = min(BufferSize, DataSize); memcpy(&SrcData[SrcDataSize], &Data[LoopStart*FrameSize], DataSize); SrcDataSize += DataSize; BufferSize -= DataSize; } } } else { /* Crawl the buffer queue to fill in the temp buffer */ ALbufferlistitem *BufferListIter = BufferListItem; ALuint pos; if(DataPosInt >= BufferPrePadding) pos = (DataPosInt-BufferPrePadding)*FrameSize; else { pos = (BufferPrePadding-DataPosInt)*FrameSize; while(pos > 0) { if(!BufferListIter->prev && !Looping) { ALuint DataSize = min(BufferSize, pos); memset(&SrcData[SrcDataSize], (FmtType==FmtUByte)?0x80:0, DataSize); SrcDataSize += DataSize; BufferSize -= DataSize; pos = 0; break; } if(BufferListIter->prev) BufferListIter = BufferListIter->prev; else { while(BufferListIter->next) BufferListIter = BufferListIter->next; } if(BufferListIter->buffer) { if((ALuint)BufferListIter->buffer->size > pos) { pos = BufferListIter->buffer->size - pos; break; } pos -= BufferListIter->buffer->size; } } } while(BufferListIter && BufferSize > 0) { const ALbuffer *ALBuffer; if((ALBuffer=BufferListIter->buffer) != NULL) { const ALubyte *Data = ALBuffer->data; ALuint DataSize = ALBuffer->size; /* Skip the data already played */ if(DataSize <= pos) pos -= DataSize; else { Data += pos; DataSize -= pos; pos -= pos; DataSize = min(BufferSize, DataSize); memcpy(&SrcData[SrcDataSize], Data, DataSize); SrcDataSize += DataSize; BufferSize -= DataSize; } } BufferListIter = BufferListIter->next; if(!BufferListIter && Looping) BufferListIter = Source->queue; else if(!BufferListIter) { memset(&SrcData[SrcDataSize], (FmtType==FmtUByte)?0x80:0, BufferSize); SrcDataSize += BufferSize; BufferSize -= BufferSize; } } } /* Figure out how many samples we can mix. */ DataSize64 = SrcDataSize / FrameSize; DataSize64 -= BufferPadding+BufferPrePadding; DataSize64 <<= FRACTIONBITS; DataSize64 -= increment; DataSize64 -= DataPosFrac; BufferSize = (ALuint)((DataSize64+(increment-1)) / increment); BufferSize = min(BufferSize, (SamplesToDo-OutPos)); SrcData += BufferPrePadding*FrameSize; switch(Resampler) { case POINT_RESAMPLER: Mix_point(Source, Device, FmtChannels, FmtType, SrcData, &DataPosInt, &DataPosFrac, OutPos, SamplesToDo, BufferSize); break; case LINEAR_RESAMPLER: Mix_lerp(Source, Device, FmtChannels, FmtType, SrcData, &DataPosInt, &DataPosFrac, OutPos, SamplesToDo, BufferSize); break; case CUBIC_RESAMPLER: Mix_cubic(Source, Device, FmtChannels, FmtType, SrcData, &DataPosInt, &DataPosFrac, OutPos, SamplesToDo, BufferSize); break; case RESAMPLER_MIN: case RESAMPLER_MAX: break; } OutPos += BufferSize; /* Handle looping sources */ while(1) { const ALbuffer *ALBuffer; ALuint DataSize = 0; ALuint LoopStart = 0; ALuint LoopEnd = 0; if((ALBuffer=BufferListItem->buffer) != NULL) { DataSize = ALBuffer->size / FrameSize; LoopStart = ALBuffer->LoopStart; LoopEnd = ALBuffer->LoopEnd; if(LoopEnd > DataPosInt) break; } if(Looping && Source->lSourceType == AL_STATIC) { BufferListItem = Source->queue; DataPosInt = ((DataPosInt-LoopStart)%(LoopEnd-LoopStart)) + LoopStart; break; } if(DataSize > DataPosInt) break; if(BufferListItem->next) { BufferListItem = BufferListItem->next; BuffersPlayed++; } else if(Looping) { BufferListItem = Source->queue; BuffersPlayed = 0; } else { State = AL_STOPPED; BufferListItem = Source->queue; BuffersPlayed = Source->BuffersInQueue; DataPosInt = 0; DataPosFrac = 0; break; } DataPosInt -= DataSize; } } while(State == AL_PLAYING && OutPos < SamplesToDo); /* Update source info */ Source->state = State; Source->BuffersPlayed = BuffersPlayed; Source->position = DataPosInt; Source->position_fraction = DataPosFrac; Source->Buffer = BufferListItem->buffer; }