/** * 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 "alMain.h" #include "AL/al.h" #include "AL/alc.h" #include "alError.h" #include "alSource.h" #include "alBuffer.h" #include "alThunk.h" #include "alAuxEffectSlot.h" static ALvoid InitSourceParams(ALCcontext *Context, ALsource *pSource); static ALboolean GetSourceOffset(ALsource *pSource, ALenum eName, ALfloat *pflOffset, ALuint updateSize); static ALvoid ApplyOffset(ALsource *pSource, ALboolean bUpdateContext); static ALint GetByteOffset(ALsource *pSource); ALAPI ALvoid ALAPIENTRY alGenSources(ALsizei n,ALuint *sources) { ALCcontext *Context; ALCdevice *Device; ALsizei i=0; Context = GetContextSuspended(); if(!Context) return; if(n > 0) { Device = Context->Device; // Check that enough memory has been allocted in the 'sources' array for n Sources if(!IsBadWritePtr((void*)sources, n * sizeof(ALuint))) { // Check that the requested number of sources can be generated if((Context->SourceCount + n) <= Device->MaxNoOfSources) { ALsource **list = &Context->Source; while(*list) list = &(*list)->next; // Add additional sources to the list (Source->next points to the location for the next Source structure) while(i < n) { *list = calloc(1, sizeof(ALsource)); if(!(*list)) { alDeleteSources(i, sources); alSetError(AL_OUT_OF_MEMORY); break; } sources[i] = (ALuint)ALTHUNK_ADDENTRY(*list); (*list)->source = sources[i]; InitSourceParams(Context, *list); Context->SourceCount++; i++; list = &(*list)->next; } } else { // Not enough resources to create the Sources alSetError(AL_INVALID_VALUE); } } else { // Bad pointer alSetError(AL_INVALID_VALUE); } } ProcessContext(Context); } ALAPI ALvoid ALAPIENTRY alDeleteSources(ALsizei n, const ALuint *sources) { ALCcontext *Context; ALCdevice *Device; ALsource *ALSource; ALsource **list; ALsizei i, j; ALbufferlistitem *ALBufferList; ALboolean bSourcesValid = AL_TRUE; Context = GetContextSuspended(); if(!Context) return; if(n >= 0) { Device = Context->Device; // Check that all Sources are valid (and can therefore be deleted) for (i = 0; i < n; i++) { if (!alIsSource(sources[i])) { alSetError(AL_INVALID_NAME); bSourcesValid = AL_FALSE; break; } } if(bSourcesValid) { // All Sources are valid, and can be deleted for(i = 0; i < n; i++) { // Recheck that the Source is valid, because there could be duplicated Source names if(alIsSource(sources[i])) { ALSource = (ALsource*)ALTHUNK_LOOKUPENTRY(sources[i]); alSourceStop((ALuint)ALSource->source); // For each buffer in the source's queue, decrement its reference counter and remove it while (ALSource->queue != NULL) { ALBufferList = ALSource->queue; // Decrement buffer's reference counter if(ALBufferList->buffer != NULL) ALBufferList->buffer->refcount--; // Update queue to point to next element in list ALSource->queue = ALBufferList->next; // Release memory allocated for buffer list item free(ALBufferList); } for(j = 0;j < MAX_SENDS;++j) { if(ALSource->Send[j].Slot) ALSource->Send[j].Slot->refcount--; ALSource->Send[j].Slot = NULL; } // Decrement Source count Context->SourceCount--; // Remove Source from list of Sources list = &Context->Source; while(*list && *list != ALSource) list = &(*list)->next; if(*list) *list = (*list)->next; ALTHUNK_REMOVEENTRY(ALSource->source); memset(ALSource,0,sizeof(ALsource)); free(ALSource); } } } } else alSetError(AL_INVALID_VALUE); ProcessContext(Context); } ALAPI ALboolean ALAPIENTRY alIsSource(ALuint source) { ALboolean result=AL_FALSE; ALCcontext *Context; ALsource *Source; Context = GetContextSuspended(); if(!Context) return AL_FALSE; // To determine if this is a valid Source name, look through the list of generated Sources Source = Context->Source; while(Source) { if(Source->source == source) { result = AL_TRUE; break; } Source = Source->next; } ProcessContext(Context); return result; } ALAPI ALvoid ALAPIENTRY alSourcef(ALuint source, ALenum eParam, ALfloat flValue) { ALCcontext *pContext; ALsource *pSource; pContext = GetContextSuspended(); if(!pContext) return; if(alIsSource(source)) { pSource = (ALsource*)ALTHUNK_LOOKUPENTRY(source); switch(eParam) { case AL_PITCH: if(flValue >= 0.0f) { pSource->flPitch = flValue; if(pSource->flPitch < 0.001f) pSource->flPitch = 0.001f; } else alSetError(AL_INVALID_VALUE); break; case AL_CONE_INNER_ANGLE: if(flValue >= 0.0f && flValue <= 360.0f) pSource->flInnerAngle = flValue; else alSetError(AL_INVALID_VALUE); break; case AL_CONE_OUTER_ANGLE: if(flValue >= 0.0f && flValue <= 360.0f) pSource->flOuterAngle = flValue; else alSetError(AL_INVALID_VALUE); break; case AL_GAIN: if(flValue >= 0.0f) pSource->flGain = flValue; else alSetError(AL_INVALID_VALUE); break; case AL_MAX_DISTANCE: if(flValue >= 0.0f) pSource->flMaxDistance = flValue; else alSetError(AL_INVALID_VALUE); break; case AL_ROLLOFF_FACTOR: if(flValue >= 0.0f) pSource->flRollOffFactor = flValue; else alSetError(AL_INVALID_VALUE); break; case AL_REFERENCE_DISTANCE: if(flValue >= 0.0f) pSource->flRefDistance = flValue; else alSetError(AL_INVALID_VALUE); break; case AL_MIN_GAIN: if(flValue >= 0.0f && flValue <= 1.0f) pSource->flMinGain = flValue; else alSetError(AL_INVALID_VALUE); break; case AL_MAX_GAIN: if(flValue >= 0.0f && flValue <= 1.0f) pSource->flMaxGain = flValue; else alSetError(AL_INVALID_VALUE); break; case AL_CONE_OUTER_GAIN: if(flValue >= 0.0f && flValue <= 1.0f) pSource->flOuterGain = flValue; else alSetError(AL_INVALID_VALUE); break; case AL_CONE_OUTER_GAINHF: if(flValue >= 0.0f && flValue <= 1.0f) pSource->OuterGainHF = flValue; else alSetError(AL_INVALID_VALUE); break; case AL_AIR_ABSORPTION_FACTOR: if(flValue >= 0.0f && flValue <= 10.0f) pSource->AirAbsorptionFactor = flValue; else alSetError(AL_INVALID_VALUE); break; case AL_ROOM_ROLLOFF_FACTOR: if(flValue >= 0.0f && flValue <= 10.0f) pSource->RoomRolloffFactor = flValue; else alSetError(AL_INVALID_VALUE); break; case AL_DOPPLER_FACTOR: if(flValue >= 0.0f && flValue <= 1.0f) pSource->DopplerFactor = flValue; else alSetError(AL_INVALID_VALUE); break; case AL_SEC_OFFSET: case AL_SAMPLE_OFFSET: case AL_BYTE_OFFSET: if(flValue >= 0.0f) { pSource->lOffsetType = eParam; // Store Offset (convert Seconds into Milliseconds) if(eParam == AL_SEC_OFFSET) pSource->lOffset = (ALint)(flValue * 1000.0f); else pSource->lOffset = (ALint)flValue; if ((pSource->state == AL_PLAYING) || (pSource->state == AL_PAUSED)) ApplyOffset(pSource, AL_TRUE); } else alSetError(AL_INVALID_VALUE); break; default: alSetError(AL_INVALID_ENUM); break; } } else { // Invalid Source Name alSetError(AL_INVALID_NAME); } ProcessContext(pContext); } ALAPI ALvoid ALAPIENTRY alSource3f(ALuint source, ALenum eParam, ALfloat flValue1,ALfloat flValue2,ALfloat flValue3) { ALCcontext *pContext; ALsource *pSource; pContext = GetContextSuspended(); if(!pContext) return; if(alIsSource(source)) { pSource = (ALsource*)ALTHUNK_LOOKUPENTRY(source); switch(eParam) { case AL_POSITION: pSource->vPosition[0] = flValue1; pSource->vPosition[1] = flValue2; pSource->vPosition[2] = flValue3; break; case AL_VELOCITY: pSource->vVelocity[0] = flValue1; pSource->vVelocity[1] = flValue2; pSource->vVelocity[2] = flValue3; break; case AL_DIRECTION: pSource->vOrientation[0] = flValue1; pSource->vOrientation[1] = flValue2; pSource->vOrientation[2] = flValue3; break; default: alSetError(AL_INVALID_ENUM); break; } } else alSetError(AL_INVALID_NAME); ProcessContext(pContext); } ALAPI ALvoid ALAPIENTRY alSourcefv(ALuint source, ALenum eParam, const ALfloat *pflValues) { ALCcontext *pContext; pContext = GetContextSuspended(); if(!pContext) return; if(pflValues) { if(alIsSource(source)) { switch(eParam) { case AL_PITCH: case AL_CONE_INNER_ANGLE: case AL_CONE_OUTER_ANGLE: case AL_GAIN: case AL_MAX_DISTANCE: case AL_ROLLOFF_FACTOR: case AL_REFERENCE_DISTANCE: case AL_MIN_GAIN: case AL_MAX_GAIN: case AL_CONE_OUTER_GAIN: case AL_CONE_OUTER_GAINHF: case AL_SEC_OFFSET: case AL_SAMPLE_OFFSET: case AL_BYTE_OFFSET: case AL_AIR_ABSORPTION_FACTOR: case AL_ROOM_ROLLOFF_FACTOR: alSourcef(source, eParam, pflValues[0]); break; case AL_POSITION: case AL_VELOCITY: case AL_DIRECTION: alSource3f(source, eParam, pflValues[0], pflValues[1], pflValues[2]); break; default: alSetError(AL_INVALID_ENUM); break; } } else alSetError(AL_INVALID_NAME); } else alSetError(AL_INVALID_VALUE); ProcessContext(pContext); } ALAPI ALvoid ALAPIENTRY alSourcei(ALuint source,ALenum eParam,ALint lValue) { ALCcontext *pContext; ALsource *pSource; ALbufferlistitem *pALBufferListItem; ALuint i; pContext = GetContextSuspended(); if(!pContext) return; if(alIsSource(source)) { pSource = (ALsource*)ALTHUNK_LOOKUPENTRY(source); switch(eParam) { case AL_MAX_DISTANCE: case AL_ROLLOFF_FACTOR: case AL_REFERENCE_DISTANCE: alSourcef(source, eParam, (ALfloat)lValue); break; case AL_SOURCE_RELATIVE: if(lValue == AL_FALSE || lValue == AL_TRUE) pSource->bHeadRelative = (ALboolean)lValue; else alSetError(AL_INVALID_VALUE); break; case AL_CONE_INNER_ANGLE: if(lValue >= 0 && lValue <= 360) pSource->flInnerAngle = (float)lValue; else alSetError(AL_INVALID_VALUE); break; case AL_CONE_OUTER_ANGLE: if(lValue >= 0 && lValue <= 360) pSource->flOuterAngle = (float)lValue; else alSetError(AL_INVALID_VALUE); break; case AL_LOOPING: if(lValue == AL_FALSE || lValue == AL_TRUE) { pSource->bLooping = (ALboolean)lValue; pALBufferListItem = pSource->queue; for(i = 0;pALBufferListItem != NULL;i++) { if(lValue == AL_FALSE && i <= pSource->BuffersPlayed) pALBufferListItem->bufferstate = PROCESSED; else pALBufferListItem->bufferstate = PENDING; pALBufferListItem = pALBufferListItem->next; } } else alSetError(AL_INVALID_VALUE); break; case AL_BUFFER: if(pSource->state == AL_STOPPED || pSource->state == AL_INITIAL) { if(alIsBuffer(lValue)) { ALbuffer *buffer = NULL; // Remove all elements in the queue while(pSource->queue != NULL) { pALBufferListItem = pSource->queue; pSource->queue = pALBufferListItem->next; // Decrement reference counter for buffer if(pALBufferListItem->buffer) pALBufferListItem->buffer->refcount--; // Release memory for buffer list item free(pALBufferListItem); // Decrement the number of buffers in the queue pSource->BuffersInQueue--; } // Add the buffer to the queue (as long as it is NOT the NULL buffer) if(lValue != 0) { buffer = (ALbuffer*)(ALTHUNK_LOOKUPENTRY(lValue)); // Source is now in STATIC mode pSource->lSourceType = AL_STATIC; // Add the selected buffer to the queue pALBufferListItem = malloc(sizeof(ALbufferlistitem)); pALBufferListItem->buffer = buffer; pALBufferListItem->bufferstate = PENDING; pALBufferListItem->flag = 0; pALBufferListItem->next = NULL; pSource->queue = pALBufferListItem; pSource->BuffersInQueue = 1; // Increment reference counter for buffer buffer->refcount++; } else { // Source is now in UNDETERMINED mode pSource->lSourceType = AL_UNDETERMINED; pSource->BuffersPlayed = 0; } // Update AL_BUFFER parameter pSource->Buffer = buffer; } else alSetError(AL_INVALID_VALUE); } else alSetError(AL_INVALID_OPERATION); break; case AL_SOURCE_STATE: // Query only alSetError(AL_INVALID_OPERATION); break; case AL_SEC_OFFSET: case AL_SAMPLE_OFFSET: case AL_BYTE_OFFSET: if(lValue >= 0) { pSource->lOffsetType = eParam; // Store Offset (convert Seconds into Milliseconds) if(eParam == AL_SEC_OFFSET) pSource->lOffset = lValue * 1000; else pSource->lOffset = lValue; if(pSource->state == AL_PLAYING || pSource->state == AL_PAUSED) ApplyOffset(pSource, AL_TRUE); } else alSetError(AL_INVALID_VALUE); break; case AL_DIRECT_FILTER: if(alIsFilter(lValue)) { ALfilter *filter = (ALfilter*)ALTHUNK_LOOKUPENTRY(lValue); if(!filter) { pSource->DirectFilter.type = AL_FILTER_NULL; pSource->DirectFilter.filter = 0; } else memcpy(&pSource->DirectFilter, filter, sizeof(*filter)); } else alSetError(AL_INVALID_VALUE); break; case AL_DIRECT_FILTER_GAINHF_AUTO: if(lValue == AL_TRUE || lValue == AL_FALSE) pSource->DryGainHFAuto = lValue; else alSetError(AL_INVALID_VALUE); break; case AL_AUXILIARY_SEND_FILTER_GAIN_AUTO: if(lValue == AL_TRUE || lValue == AL_FALSE) pSource->WetGainAuto = lValue; else alSetError(AL_INVALID_VALUE); break; case AL_AUXILIARY_SEND_FILTER_GAINHF_AUTO: if(lValue == AL_TRUE || lValue == AL_FALSE) pSource->WetGainHFAuto = lValue; else alSetError(AL_INVALID_VALUE); break; case AL_DISTANCE_MODEL: if(lValue == AL_NONE || lValue == AL_INVERSE_DISTANCE || lValue == AL_INVERSE_DISTANCE_CLAMPED || lValue == AL_LINEAR_DISTANCE || lValue == AL_LINEAR_DISTANCE_CLAMPED || lValue == AL_EXPONENT_DISTANCE || lValue == AL_EXPONENT_DISTANCE_CLAMPED) pSource->DistanceModel = lValue; else alSetError(AL_INVALID_VALUE); break; default: alSetError(AL_INVALID_ENUM); break; } } else alSetError(AL_INVALID_NAME); ProcessContext(pContext); } ALAPI void ALAPIENTRY alSource3i(ALuint source, ALenum eParam, ALint lValue1, ALint lValue2, ALint lValue3) { ALCcontext *pContext; pContext = GetContextSuspended(); if(!pContext) return; if(alIsSource(source)) { ALsource *pSource = (ALsource*)ALTHUNK_LOOKUPENTRY(source); ALCdevice *Device = pContext->Device; switch (eParam) { case AL_POSITION: case AL_VELOCITY: case AL_DIRECTION: alSource3f(source, eParam, (ALfloat)lValue1, (ALfloat)lValue2, (ALfloat)lValue3); break; case AL_AUXILIARY_SEND_FILTER: if((ALuint)lValue2 < Device->NumAuxSends && (lValue1 == 0 || alIsAuxiliaryEffectSlot(lValue1)) && alIsFilter(lValue3)) { ALeffectslot *ALEffectSlot = (ALeffectslot*)ALTHUNK_LOOKUPENTRY(lValue1); ALfilter *ALFilter = (ALfilter*)ALTHUNK_LOOKUPENTRY(lValue3); /* Release refcount on the previous slot, and add one for * the new slot */ if(pSource->Send[lValue2].Slot) pSource->Send[lValue2].Slot->refcount--; pSource->Send[lValue2].Slot = ALEffectSlot; if(pSource->Send[lValue2].Slot) pSource->Send[lValue2].Slot->refcount++; if(!ALFilter) { /* Disable filter */ pSource->Send[lValue2].WetFilter.type = 0; pSource->Send[lValue2].WetFilter.filter = 0; } else memcpy(&pSource->Send[lValue2].WetFilter, ALFilter, sizeof(*ALFilter)); } else alSetError(AL_INVALID_VALUE); break; default: alSetError(AL_INVALID_ENUM); break; } } else alSetError(AL_INVALID_NAME); ProcessContext(pContext); } ALAPI void ALAPIENTRY alSourceiv(ALuint source, ALenum eParam, const ALint* plValues) { ALCcontext *pContext; pContext = GetContextSuspended(); if(!pContext) return; if(plValues) { if(alIsSource(source)) { switch(eParam) { case AL_SOURCE_RELATIVE: case AL_CONE_INNER_ANGLE: case AL_CONE_OUTER_ANGLE: case AL_LOOPING: case AL_BUFFER: case AL_SOURCE_STATE: case AL_SEC_OFFSET: case AL_SAMPLE_OFFSET: case AL_BYTE_OFFSET: case AL_MAX_DISTANCE: case AL_ROLLOFF_FACTOR: case AL_REFERENCE_DISTANCE: case AL_DIRECT_FILTER: case AL_DIRECT_FILTER_GAINHF_AUTO: case AL_AUXILIARY_SEND_FILTER_GAIN_AUTO: case AL_AUXILIARY_SEND_FILTER_GAINHF_AUTO: case AL_DISTANCE_MODEL: alSourcei(source, eParam, plValues[0]); break; case AL_POSITION: case AL_VELOCITY: case AL_DIRECTION: case AL_AUXILIARY_SEND_FILTER: alSource3i(source, eParam, plValues[0], plValues[1], plValues[2]); break; default: alSetError(AL_INVALID_ENUM); break; } } else alSetError(AL_INVALID_NAME); } else alSetError(AL_INVALID_VALUE); ProcessContext(pContext); } ALAPI ALvoid ALAPIENTRY alGetSourcef(ALuint source, ALenum eParam, ALfloat *pflValue) { ALCcontext *pContext; ALsource *pSource; ALfloat flOffset[2]; pContext = GetContextSuspended(); if(!pContext) return; if(pflValue) { if(alIsSource(source)) { pSource = (ALsource*)ALTHUNK_LOOKUPENTRY(source); switch(eParam) { case AL_PITCH: *pflValue = pSource->flPitch; break; case AL_GAIN: *pflValue = pSource->flGain; break; case AL_MIN_GAIN: *pflValue = pSource->flMinGain; break; case AL_MAX_GAIN: *pflValue = pSource->flMaxGain; break; case AL_MAX_DISTANCE: *pflValue = pSource->flMaxDistance; break; case AL_ROLLOFF_FACTOR: *pflValue = pSource->flRollOffFactor; break; case AL_CONE_OUTER_GAIN: *pflValue = pSource->flOuterGain; break; case AL_CONE_OUTER_GAINHF: *pflValue = pSource->OuterGainHF; break; case AL_SEC_OFFSET: case AL_SAMPLE_OFFSET: case AL_BYTE_OFFSET: if(GetSourceOffset(pSource, eParam, flOffset, pContext->Device->UpdateSize)) *pflValue = flOffset[0]; else alSetError(AL_INVALID_OPERATION); break; case AL_SEC_RW_OFFSETS_EXT: case AL_SAMPLE_RW_OFFSETS_EXT: case AL_BYTE_RW_OFFSETS_EXT: if(GetSourceOffset(pSource, eParam, flOffset, pContext->Device->UpdateSize)) { pflValue[0] = flOffset[0]; pflValue[1] = flOffset[1]; } else alSetError(AL_INVALID_OPERATION); break; case AL_CONE_INNER_ANGLE: *pflValue = pSource->flInnerAngle; break; case AL_CONE_OUTER_ANGLE: *pflValue = pSource->flOuterAngle; break; case AL_REFERENCE_DISTANCE: *pflValue = pSource->flRefDistance; break; case AL_AIR_ABSORPTION_FACTOR: *pflValue = pSource->AirAbsorptionFactor; break; case AL_ROOM_ROLLOFF_FACTOR: *pflValue = pSource->RoomRolloffFactor; break; case AL_DOPPLER_FACTOR: *pflValue = pSource->DopplerFactor; break; default: alSetError(AL_INVALID_ENUM); break; } } else alSetError(AL_INVALID_NAME); } else alSetError(AL_INVALID_VALUE); ProcessContext(pContext); } ALAPI ALvoid ALAPIENTRY alGetSource3f(ALuint source, ALenum eParam, ALfloat* pflValue1, ALfloat* pflValue2, ALfloat* pflValue3) { ALCcontext *pContext; ALsource *pSource; pContext = GetContextSuspended(); if(!pContext) return; if(pflValue1 && pflValue2 && pflValue3) { if(alIsSource(source)) { pSource = (ALsource*)ALTHUNK_LOOKUPENTRY(source); switch(eParam) { case AL_POSITION: *pflValue1 = pSource->vPosition[0]; *pflValue2 = pSource->vPosition[1]; *pflValue3 = pSource->vPosition[2]; break; case AL_VELOCITY: *pflValue1 = pSource->vVelocity[0]; *pflValue2 = pSource->vVelocity[1]; *pflValue3 = pSource->vVelocity[2]; break; case AL_DIRECTION: *pflValue1 = pSource->vOrientation[0]; *pflValue2 = pSource->vOrientation[1]; *pflValue3 = pSource->vOrientation[2]; break; default: alSetError(AL_INVALID_ENUM); break; } } else alSetError(AL_INVALID_NAME); } else alSetError(AL_INVALID_VALUE); ProcessContext(pContext); } ALAPI ALvoid ALAPIENTRY alGetSourcefv(ALuint source, ALenum eParam, ALfloat *pflValues) { ALCcontext *pContext; ALsource *pSource; pContext = GetContextSuspended(); if(!pContext) return; if(pflValues) { if(alIsSource(source)) { pSource = (ALsource*)ALTHUNK_LOOKUPENTRY(source); switch(eParam) { case AL_PITCH: case AL_GAIN: case AL_MIN_GAIN: case AL_MAX_GAIN: case AL_MAX_DISTANCE: case AL_ROLLOFF_FACTOR: case AL_DOPPLER_FACTOR: case AL_CONE_OUTER_GAIN: case AL_SEC_OFFSET: case AL_SAMPLE_OFFSET: case AL_BYTE_OFFSET: case AL_CONE_INNER_ANGLE: case AL_CONE_OUTER_ANGLE: case AL_REFERENCE_DISTANCE: case AL_CONE_OUTER_GAINHF: case AL_AIR_ABSORPTION_FACTOR: case AL_ROOM_ROLLOFF_FACTOR: alGetSourcef(source, eParam, pflValues); break; case AL_POSITION: pflValues[0] = pSource->vPosition[0]; pflValues[1] = pSource->vPosition[1]; pflValues[2] = pSource->vPosition[2]; break; case AL_VELOCITY: pflValues[0] = pSource->vVelocity[0]; pflValues[1] = pSource->vVelocity[1]; pflValues[2] = pSource->vVelocity[2]; break; case AL_DIRECTION: pflValues[0] = pSource->vOrientation[0]; pflValues[1] = pSource->vOrientation[1]; pflValues[2] = pSource->vOrientation[2]; break; default: alSetError(AL_INVALID_ENUM); break; } } else alSetError(AL_INVALID_NAME); } else alSetError(AL_INVALID_VALUE); ProcessContext(pContext); } ALAPI ALvoid ALAPIENTRY alGetSourcei(ALuint source, ALenum eParam, ALint *plValue) { ALCcontext *pContext; ALsource *pSource; ALfloat flOffset[2]; pContext = GetContextSuspended(); if(!pContext) return; if(plValue) { if(alIsSource(source)) { pSource = (ALsource*)ALTHUNK_LOOKUPENTRY(source); switch(eParam) { case AL_MAX_DISTANCE: *plValue = (ALint)pSource->flMaxDistance; break; case AL_ROLLOFF_FACTOR: *plValue = (ALint)pSource->flRollOffFactor; break; case AL_REFERENCE_DISTANCE: *plValue = (ALint)pSource->flRefDistance; break; case AL_SOURCE_RELATIVE: *plValue = pSource->bHeadRelative; break; case AL_CONE_INNER_ANGLE: *plValue = (ALint)pSource->flInnerAngle; break; case AL_CONE_OUTER_ANGLE: *plValue = (ALint)pSource->flOuterAngle; break; case AL_LOOPING: *plValue = pSource->bLooping; break; case AL_BUFFER: *plValue = (pSource->Buffer ? pSource->Buffer->buffer : 0); break; case AL_SOURCE_STATE: *plValue = pSource->state; break; case AL_BUFFERS_QUEUED: *plValue = pSource->BuffersInQueue; break; case AL_BUFFERS_PROCESSED: if(pSource->bLooping) { /* Buffers on a looping source are in a perpetual state * of PENDING, so don't report any as PROCESSED */ *plValue = 0; } else *plValue = pSource->BuffersPlayed; break; case AL_SOURCE_TYPE: *plValue = pSource->lSourceType; break; case AL_SEC_OFFSET: case AL_SAMPLE_OFFSET: case AL_BYTE_OFFSET: if(GetSourceOffset(pSource, eParam, flOffset, pContext->Device->UpdateSize)) *plValue = (ALint)flOffset[0]; else alSetError(AL_INVALID_OPERATION); break; case AL_SEC_RW_OFFSETS_EXT: case AL_SAMPLE_RW_OFFSETS_EXT: case AL_BYTE_RW_OFFSETS_EXT: if(GetSourceOffset(pSource, eParam, flOffset, pContext->Device->UpdateSize)) { plValue[0] = (ALint)flOffset[0]; plValue[1] = (ALint)flOffset[1]; } else alSetError(AL_INVALID_OPERATION); break; case AL_DIRECT_FILTER: *plValue = pSource->DirectFilter.filter; break; case AL_DIRECT_FILTER_GAINHF_AUTO: *plValue = pSource->DryGainHFAuto; break; case AL_AUXILIARY_SEND_FILTER_GAIN_AUTO: *plValue = pSource->WetGainAuto; break; case AL_AUXILIARY_SEND_FILTER_GAINHF_AUTO: *plValue = pSource->WetGainHFAuto; break; case AL_DOPPLER_FACTOR: *plValue = (ALint)pSource->DopplerFactor; break; case AL_DISTANCE_MODEL: *plValue = pSource->DistanceModel; break; default: alSetError(AL_INVALID_ENUM); break; } } else alSetError(AL_INVALID_NAME); } else alSetError(AL_INVALID_VALUE); ProcessContext(pContext); } ALAPI void ALAPIENTRY alGetSource3i(ALuint source, ALenum eParam, ALint* plValue1, ALint* plValue2, ALint* plValue3) { ALCcontext *pContext; ALsource *pSource; pContext = GetContextSuspended(); if(!pContext) return; if(plValue1 && plValue2 && plValue3) { if(alIsSource(source)) { pSource = (ALsource*)ALTHUNK_LOOKUPENTRY(source); switch(eParam) { case AL_POSITION: *plValue1 = (ALint)pSource->vPosition[0]; *plValue2 = (ALint)pSource->vPosition[1]; *plValue3 = (ALint)pSource->vPosition[2]; break; case AL_VELOCITY: *plValue1 = (ALint)pSource->vVelocity[0]; *plValue2 = (ALint)pSource->vVelocity[1]; *plValue3 = (ALint)pSource->vVelocity[2]; break; case AL_DIRECTION: *plValue1 = (ALint)pSource->vOrientation[0]; *plValue2 = (ALint)pSource->vOrientation[1]; *plValue3 = (ALint)pSource->vOrientation[2]; break; default: alSetError(AL_INVALID_ENUM); break; } } else alSetError(AL_INVALID_NAME); } else alSetError(AL_INVALID_VALUE); ProcessContext(pContext); } ALAPI void ALAPIENTRY alGetSourceiv(ALuint source, ALenum eParam, ALint* plValues) { ALCcontext *pContext; ALsource *pSource; pContext = GetContextSuspended(); if(!pContext) return; if(plValues) { if(alIsSource(source)) { pSource = (ALsource*)ALTHUNK_LOOKUPENTRY(source); switch(eParam) { case AL_SOURCE_RELATIVE: case AL_CONE_INNER_ANGLE: case AL_CONE_OUTER_ANGLE: case AL_LOOPING: case AL_BUFFER: case AL_SOURCE_STATE: case AL_BUFFERS_QUEUED: case AL_BUFFERS_PROCESSED: case AL_SEC_OFFSET: case AL_SAMPLE_OFFSET: case AL_BYTE_OFFSET: case AL_MAX_DISTANCE: case AL_ROLLOFF_FACTOR: case AL_DOPPLER_FACTOR: case AL_REFERENCE_DISTANCE: case AL_SOURCE_TYPE: case AL_DIRECT_FILTER: case AL_DIRECT_FILTER_GAINHF_AUTO: case AL_AUXILIARY_SEND_FILTER_GAIN_AUTO: case AL_AUXILIARY_SEND_FILTER_GAINHF_AUTO: case AL_DISTANCE_MODEL: alGetSourcei(source, eParam, plValues); break; case AL_POSITION: plValues[0] = (ALint)pSource->vPosition[0]; plValues[1] = (ALint)pSource->vPosition[1]; plValues[2] = (ALint)pSource->vPosition[2]; break; case AL_VELOCITY: plValues[0] = (ALint)pSource->vVelocity[0]; plValues[1] = (ALint)pSource->vVelocity[1]; plValues[2] = (ALint)pSource->vVelocity[2]; break; case AL_DIRECTION: plValues[0] = (ALint)pSource->vOrientation[0]; plValues[1] = (ALint)pSource->vOrientation[1]; plValues[2] = (ALint)pSource->vOrientation[2]; break; default: alSetError(AL_INVALID_ENUM); break; } } else alSetError(AL_INVALID_NAME); } else alSetError(AL_INVALID_VALUE); ProcessContext(pContext); } ALAPI ALvoid ALAPIENTRY alSourcePlay(ALuint source) { alSourcePlayv(1, &source); return; } ALAPI ALvoid ALAPIENTRY alSourcePlayv(ALsizei n, const ALuint *pSourceList) { ALCcontext *pContext; ALsource *pSource; ALbufferlistitem *ALBufferList; ALboolean bSourcesValid = AL_TRUE; ALboolean bPlay; ALsizei i, j; pContext = GetContextSuspended(); if(!pContext) return; if(pSourceList) { // Check that all the Sources are valid for(i = 0; i < n; i++) { if(!alIsSource(pSourceList[i])) { alSetError(AL_INVALID_NAME); bSourcesValid = AL_FALSE; break; } } if(bSourcesValid) { for(i = 0; i < n; i++) { // Assume Source won't need to play bPlay = AL_FALSE; pSource = (ALsource*)ALTHUNK_LOOKUPENTRY(pSourceList[i]); // Check that there is a queue containing at least one non-null, non zero length AL Buffer ALBufferList = pSource->queue; while(ALBufferList) { if(ALBufferList->buffer != NULL && ALBufferList->buffer->size) { bPlay = AL_TRUE; break; } ALBufferList = ALBufferList->next; } if (bPlay) { for(j = 0;j < OUTPUTCHANNELS;j++) pSource->DryGains[j] = 0.0f; for(j = 0;j < MAX_SENDS;j++) pSource->WetGains[j] = 0.0f; if(pSource->state != AL_PAUSED) { pSource->state = AL_PLAYING; pSource->position = 0; pSource->position_fraction = 0; pSource->BuffersPlayed = 0; pSource->Buffer = pSource->queue->buffer; // Make sure all the Buffers in the queue are marked as PENDING ALBufferList = pSource->queue; while(ALBufferList) { ALBufferList->bufferstate = PENDING; ALBufferList = ALBufferList->next; } } else pSource->state = AL_PLAYING; // Check if an Offset has been set if(pSource->lOffset) ApplyOffset(pSource, AL_FALSE); if(pSource->BuffersPlayed == 0 && pSource->position == 0 && pSource->position_fraction == 0) pSource->FirstStart = AL_TRUE; else pSource->FirstStart = AL_FALSE; // If device is disconnected, go right to stopped if(!pContext->Device->Connected) { pSource->state = AL_STOPPED; pSource->BuffersPlayed = pSource->BuffersInQueue; ALBufferList = pSource->queue; while(ALBufferList != NULL) { ALBufferList->bufferstate = PROCESSED; ALBufferList = ALBufferList->next; } pSource->position = 0; pSource->position_fraction = 0; } } else { // If there is a queue (must all be NULL or Zero length Buffers) mark them all as processed ALBufferList = pSource->queue; while(ALBufferList) { ALBufferList->bufferstate = PROCESSED; ALBufferList = ALBufferList->next; } pSource->BuffersPlayed = pSource->BuffersInQueue; } } } } else { // sources is a NULL pointer alSetError(AL_INVALID_VALUE); } ProcessContext(pContext); } ALAPI ALvoid ALAPIENTRY alSourcePause(ALuint source) { alSourcePausev(1, &source); return; } ALAPI ALvoid ALAPIENTRY alSourcePausev(ALsizei n, const ALuint *sources) { ALCcontext *Context; ALsource *Source; ALsizei i; ALboolean bSourcesValid = AL_TRUE; Context = GetContextSuspended(); if(!Context) return; if(sources) { // Check all the Sources are valid for(i=0;istate == AL_PLAYING) Source->state = AL_PAUSED; } } } else { // sources is a NULL pointer alSetError(AL_INVALID_VALUE); } ProcessContext(Context); } ALAPI ALvoid ALAPIENTRY alSourceStop(ALuint source) { alSourceStopv(1, &source); return; } ALAPI ALvoid ALAPIENTRY alSourceStopv(ALsizei n, const ALuint *sources) { ALCcontext *Context; ALsource *Source; ALsizei i; ALbufferlistitem *ALBufferListItem; ALboolean bSourcesValid = AL_TRUE; Context = GetContextSuspended(); if(!Context) return; if(sources) { // Check all the Sources are valid for(i = 0;i < n;i++) { if(!alIsSource(sources[i])) { alSetError(AL_INVALID_NAME); bSourcesValid = AL_FALSE; break; } } if(bSourcesValid) { for(i = 0;i < n;i++) { Source = (ALsource*)ALTHUNK_LOOKUPENTRY(sources[i]); if(Source->state != AL_INITIAL) { Source->state = AL_STOPPED; Source->BuffersPlayed = Source->BuffersInQueue; ALBufferListItem = Source->queue; while(ALBufferListItem != NULL) { ALBufferListItem->bufferstate = PROCESSED; ALBufferListItem = ALBufferListItem->next; } } Source->lOffset = 0; } } } else { // sources is a NULL pointer alSetError(AL_INVALID_VALUE); } ProcessContext(Context); } ALAPI ALvoid ALAPIENTRY alSourceRewind(ALuint source) { alSourceRewindv(1, &source); return; } ALAPI ALvoid ALAPIENTRY alSourceRewindv(ALsizei n, const ALuint *sources) { ALCcontext *Context; ALsource *Source; ALsizei i; ALbufferlistitem *ALBufferListItem; ALboolean bSourcesValid = AL_TRUE; Context = GetContextSuspended(); if(!Context) return; if(sources) { // Check all the Sources are valid for(i = 0;i < n;i++) { if(!alIsSource(sources[i])) { alSetError(AL_INVALID_NAME); bSourcesValid = AL_FALSE; break; } } if(bSourcesValid) { for(i = 0;i < n;i++) { Source = (ALsource*)ALTHUNK_LOOKUPENTRY(sources[i]); if(Source->state != AL_INITIAL) { Source->state = AL_INITIAL; Source->position = 0; Source->position_fraction = 0; Source->BuffersPlayed = 0; ALBufferListItem = Source->queue; while(ALBufferListItem != NULL) { ALBufferListItem->bufferstate = PENDING; ALBufferListItem = ALBufferListItem->next; } if(Source->queue) Source->Buffer = Source->queue->buffer; } Source->lOffset = 0; } } } else { // sources is a NULL pointer alSetError(AL_INVALID_VALUE); } ProcessContext(Context); } ALAPI ALvoid ALAPIENTRY alSourceQueueBuffers( ALuint source, ALsizei n, const ALuint* buffers ) { ALCcontext *Context; ALsource *ALSource; ALsizei i; ALbufferlistitem *ALBufferList; ALbufferlistitem *ALBufferListStart; ALint iFrequency; ALint iFormat; ALboolean bBuffersValid = AL_TRUE; if (n == 0) return; Context = GetContextSuspended(); if(!Context) return; // Check that all buffers are valid or zero and that the source is valid // Check that this is a valid source if(alIsSource(source)) { ALSource = (ALsource*)ALTHUNK_LOOKUPENTRY(source); // Check that this is not a STATIC Source if(ALSource->lSourceType != AL_STATIC) { iFrequency = -1; iFormat = -1; // Check existing Queue (if any) for a valid Buffers and get its frequency and format ALBufferList = ALSource->queue; while(ALBufferList) { if (ALBufferList->buffer) { iFrequency = ALBufferList->buffer->frequency; iFormat = ALBufferList->buffer->format; break; } ALBufferList = ALBufferList->next; } for(i = 0; i < n; i++) { ALbuffer *buffer; if(!alIsBuffer(buffers[i])) { alSetError(AL_INVALID_NAME); bBuffersValid = AL_FALSE; break; } if(!buffers[i]) continue; buffer = (ALbuffer*)ALTHUNK_LOOKUPENTRY(buffers[i]); if(iFrequency == -1 && iFormat == -1) { iFrequency = buffer->frequency; iFormat = buffer->format; } else if(iFrequency != buffer->frequency || iFormat != buffer->format) { alSetError(AL_INVALID_OPERATION); bBuffersValid = AL_FALSE; break; } } if(bBuffersValid) { ALbuffer *buffer = NULL; // Change Source Type ALSource->lSourceType = AL_STREAMING; if(buffers[0]) buffer = (ALbuffer*)ALTHUNK_LOOKUPENTRY(buffers[0]); // All buffers are valid - so add them to the list ALBufferListStart = malloc(sizeof(ALbufferlistitem)); ALBufferListStart->buffer = buffer; ALBufferListStart->bufferstate = PENDING; ALBufferListStart->flag = 0; ALBufferListStart->next = NULL; // Increment reference counter for buffer if(buffer) buffer->refcount++; ALBufferList = ALBufferListStart; for(i = 1; i < n; i++) { if(buffers[i]) buffer = (ALbuffer*)ALTHUNK_LOOKUPENTRY(buffers[i]); ALBufferList->next = malloc(sizeof(ALbufferlistitem)); ALBufferList->next->buffer = buffer; ALBufferList->next->bufferstate = PENDING; ALBufferList->next->flag = 0; ALBufferList->next->next = NULL; // Increment reference counter for buffer if(buffer) buffer->refcount++; ALBufferList = ALBufferList->next; } if(ALSource->queue == NULL) { ALSource->queue = ALBufferListStart; // Update Current Buffer ALSource->Buffer = ALBufferListStart->buffer; } else { // Find end of queue ALBufferList = ALSource->queue; while(ALBufferList->next != NULL) ALBufferList = ALBufferList->next; ALBufferList->next = ALBufferListStart; } // Update number of buffers in queue ALSource->BuffersInQueue += n; } } else { // Invalid Source Type (can't queue on a Static Source) alSetError(AL_INVALID_OPERATION); } } else { // Invalid Source Name alSetError(AL_INVALID_NAME); } ProcessContext(Context); } // Implementation assumes that n is the number of buffers to be removed from the queue and buffers is // an array of buffer IDs that are to be filled with the names of the buffers removed ALAPI ALvoid ALAPIENTRY alSourceUnqueueBuffers( ALuint source, ALsizei n, ALuint* buffers ) { ALCcontext *Context; ALsource *ALSource; ALsizei i; ALbufferlistitem *ALBufferList; ALboolean bBuffersProcessed; if (n == 0) return; bBuffersProcessed = AL_TRUE; Context = GetContextSuspended(); if(!Context) return; if(alIsSource(source)) { ALSource = (ALsource*)ALTHUNK_LOOKUPENTRY(source); // Check that all 'n' buffers have been processed ALBufferList = ALSource->queue; for(i = 0; i < n; i++) { if(ALBufferList != NULL && ALBufferList->bufferstate == PROCESSED) { ALBufferList = ALBufferList->next; } else { bBuffersProcessed = AL_FALSE; break; } } // If all 'n' buffers have been processed, remove them from the queue if(bBuffersProcessed) { for(i = 0; i < n; i++) { ALBufferList = ALSource->queue; ALSource->queue = ALBufferList->next; // Record name of buffer buffers[i] = ALBufferList->buffer->buffer; // Decrement buffer reference counter if(ALBufferList->buffer) ALBufferList->buffer->refcount--; // Release memory for buffer list item free(ALBufferList); ALSource->BuffersInQueue--; } if(ALSource->state != AL_PLAYING) { if(ALSource->queue) ALSource->Buffer = ALSource->queue->buffer; else ALSource->Buffer = NULL; } if((ALuint)n > ALSource->BuffersPlayed) ALSource->BuffersPlayed = 0; else ALSource->BuffersPlayed -= n; } else { // Some buffers can't be unqueue because they have not been processed alSetError(AL_INVALID_VALUE); } } else { // Invalid Source Name alSetError(AL_INVALID_NAME); } ProcessContext(Context); } static ALvoid InitSourceParams(ALCcontext *Context, ALsource *pSource) { pSource->flInnerAngle = 360.0f; pSource->flOuterAngle = 360.0f; pSource->flPitch = 1.0f; pSource->vPosition[0] = 0.0f; pSource->vPosition[1] = 0.0f; pSource->vPosition[2] = 0.0f; pSource->vOrientation[0] = 0.0f; pSource->vOrientation[1] = 0.0f; pSource->vOrientation[2] = 0.0f; pSource->vVelocity[0] = 0.0f; pSource->vVelocity[1] = 0.0f; pSource->vVelocity[2] = 0.0f; pSource->flRefDistance = 1.0f; pSource->flMaxDistance = FLT_MAX; pSource->flRollOffFactor = 1.0f; pSource->bLooping = AL_FALSE; pSource->flGain = 1.0f; pSource->flMinGain = 0.0f; pSource->flMaxGain = 1.0f; pSource->flOuterGain = 0.0f; pSource->OuterGainHF = 1.0f; pSource->DryGainHFAuto = AL_TRUE; pSource->WetGainAuto = AL_TRUE; pSource->WetGainHFAuto = AL_TRUE; pSource->AirAbsorptionFactor = 0.0f; pSource->RoomRolloffFactor = 0.0f; pSource->DopplerFactor = 1.0f; pSource->DistanceModel = Context->DistanceModel; pSource->state = AL_INITIAL; pSource->lSourceType = AL_UNDETERMINED; pSource->Buffer = NULL; } /* GetSourceOffset Gets the current playback position in the given Source, in the appropriate format (Bytes, Samples or MilliSeconds) The offset is relative to the start of the queue (not the start of the current buffer) */ static ALboolean GetSourceOffset(ALsource *pSource, ALenum eName, ALfloat *pflOffset, ALuint updateSize) { ALbufferlistitem *pBufferList; ALbuffer *pBuffer; ALfloat flBufferFreq; ALint lChannels; ALint readPos, writePos; ALenum eOriginalFormat; ALboolean bReturn = AL_TRUE; ALint lTotalBufferDataSize; if((pSource->state == AL_PLAYING || pSource->state == AL_PAUSED) && pSource->Buffer) { pBuffer = pSource->Buffer; // Get Current Buffer Size and frequency (in milliseconds) flBufferFreq = (ALfloat)pBuffer->frequency; eOriginalFormat = pBuffer->eOriginalFormat; lChannels = aluChannelsFromFormat(pBuffer->format); // Get Current BytesPlayed readPos = pSource->position * lChannels * 2; // NOTE : This is the byte offset into the *current* buffer // Add byte length of any processed buffers in the queue pBufferList = pSource->queue; while(pBufferList && pBufferList->bufferstate == PROCESSED) { readPos += pBufferList->buffer->size; pBufferList = pBufferList->next; } if(pSource->state == AL_PLAYING) writePos = readPos + (updateSize * lChannels * 2); else writePos = readPos; lTotalBufferDataSize = 0; pBufferList = pSource->queue; while (pBufferList) { if (pBufferList->buffer) lTotalBufferDataSize += pBufferList->buffer->size; pBufferList = pBufferList->next; } if (pSource->bLooping) { if(readPos < 0) readPos = 0; else readPos %= lTotalBufferDataSize; if(writePos < 0) writePos = 0; else writePos %= lTotalBufferDataSize; } else { // Clamp BytesPlayed to within 0 and lTotalBufferDataSize if(readPos < 0) readPos = 0; else if(readPos > lTotalBufferDataSize) readPos = lTotalBufferDataSize; if(writePos < 0) writePos = 0; else if(writePos > lTotalBufferDataSize) writePos = lTotalBufferDataSize; } switch (eName) { case AL_SEC_OFFSET: case AL_SEC_RW_OFFSETS_EXT: pflOffset[0] = (ALfloat)readPos / (lChannels * 2.0f * flBufferFreq); pflOffset[1] = (ALfloat)writePos / (lChannels * 2.0f * flBufferFreq); break; case AL_SAMPLE_OFFSET: case AL_SAMPLE_RW_OFFSETS_EXT: pflOffset[0] = (ALfloat)(readPos / (lChannels * 2)); pflOffset[1] = (ALfloat)(writePos / (lChannels * 2)); break; case AL_BYTE_OFFSET: case AL_BYTE_RW_OFFSETS_EXT: // Take into account the original format of the Buffer if ((eOriginalFormat == AL_FORMAT_MONO_IMA4) || (eOriginalFormat == AL_FORMAT_STEREO_IMA4)) { // Round down to nearest ADPCM block pflOffset[0] = (ALfloat)((readPos / (65 * 2 * lChannels)) * 36 * lChannels); if(pSource->state == AL_PLAYING) { // Round up to nearest ADPCM block pflOffset[1] = (ALfloat)(((writePos + (65 * 2 * lChannels) - 1) / (65 * 2 * lChannels)) * 36 * lChannels); } else pflOffset[1] = pflOffset[0]; } else if (eOriginalFormat == AL_FORMAT_REAR8) { pflOffset[0] = (ALfloat)(readPos >> 2); pflOffset[1] = (ALfloat)(writePos >> 2); } else if (eOriginalFormat == AL_FORMAT_REAR16) { pflOffset[0] = (ALfloat)(readPos >> 1); pflOffset[1] = (ALfloat)(writePos >> 1); } else if (aluBytesFromFormat(eOriginalFormat) == 1) { pflOffset[0] = (ALfloat)(readPos >> 1); pflOffset[1] = (ALfloat)(writePos >> 1); } else if (aluBytesFromFormat(eOriginalFormat) == 4) { pflOffset[0] = (ALfloat)(readPos << 1); pflOffset[1] = (ALfloat)(writePos << 1); } else { pflOffset[0] = (ALfloat)readPos; pflOffset[1] = (ALfloat)writePos; } break; } } else { pflOffset[0] = 0.0f; pflOffset[1] = 0.0f; } return bReturn; } /* ApplyOffset Apply a playback offset to the Source. This function will update the queue (to correctly mark buffers as 'pending' or 'processed' depending upon the new offset. */ static void ApplyOffset(ALsource *pSource, ALboolean bUpdateContext) { ALbufferlistitem *pBufferList; ALbuffer *pBuffer; ALint lBufferSize, lTotalBufferSize; ALint lByteOffset; // Get true byte offset lByteOffset = GetByteOffset(pSource); // If this is a valid offset apply it if (lByteOffset != -1) { // Sort out the queue (pending and processed states) pBufferList = pSource->queue; lTotalBufferSize = 0; pSource->BuffersPlayed = 0; while (pBufferList) { pBuffer = pBufferList->buffer; lBufferSize = pBuffer ? pBuffer->size : 0; if ((lTotalBufferSize + lBufferSize) <= lByteOffset) { // Offset is past this buffer so increment BuffersPlayed and if the Source is NOT looping // update the state to PROCESSED pSource->BuffersPlayed++; if (!pSource->bLooping) pBufferList->bufferstate = PROCESSED; } else if (lTotalBufferSize <= lByteOffset) { // Offset is within this buffer pBufferList->bufferstate = PENDING; // Set Current Buffer pSource->Buffer = pBufferList->buffer; // SW Mixer Positions are in Samples pSource->position = (lByteOffset - lTotalBufferSize) / aluBytesFromFormat(pBuffer->format) / aluChannelsFromFormat(pBuffer->format); } else { // Offset is before this buffer, so mark as pending pBufferList->bufferstate = PENDING; } // Increment the TotalBufferSize lTotalBufferSize += lBufferSize; // Move on to next buffer in the Queue pBufferList = pBufferList->next; } } else { if (bUpdateContext) alSetError(AL_INVALID_VALUE); } // Clear Offset pSource->lOffset = 0; } /* GetByteOffset Returns the 'true' byte offset into the Source's queue (from the Sample, Byte or Millisecond offset supplied by the application). This takes into account the fact that the buffer format may have been modifed by AL (e.g 8bit samples are converted to 16bit) */ static ALint GetByteOffset(ALsource *pSource) { ALbuffer *pBuffer = NULL; ALbufferlistitem *pBufferList; ALfloat flBufferFreq; ALint lChannels; ALint lByteOffset = -1; ALint lTotalBufferDataSize; // Find the first non-NULL Buffer in the Queue pBufferList = pSource->queue; while (pBufferList) { if (pBufferList->buffer) { pBuffer = pBufferList->buffer; break; } pBufferList = pBufferList->next; } if (pBuffer) { flBufferFreq = ((ALfloat)pBuffer->frequency); lChannels = aluChannelsFromFormat(pBuffer->format); // Determine the ByteOffset (and ensure it is block aligned) switch (pSource->lOffsetType) { case AL_BYTE_OFFSET: // Take into consideration the original format if ((pBuffer->eOriginalFormat == AL_FORMAT_MONO_IMA4) || (pBuffer->eOriginalFormat == AL_FORMAT_STEREO_IMA4)) { // Round down to nearest ADPCM block lByteOffset = (pSource->lOffset / (36 * lChannels)) * 36 * lChannels; // Multiply by compression rate lByteOffset = (ALint)(3.6111f * (ALfloat)lByteOffset); lByteOffset -= (lByteOffset % (lChannels * 2)); } else if (pBuffer->eOriginalFormat == AL_FORMAT_REAR8) { lByteOffset = pSource->lOffset * 4; lByteOffset -= (lByteOffset % (lChannels * 2)); } else if (pBuffer->eOriginalFormat == AL_FORMAT_REAR16) { lByteOffset = pSource->lOffset * 2; lByteOffset -= (lByteOffset % (lChannels * 2)); } else if (aluBytesFromFormat(pBuffer->eOriginalFormat) == 1) { lByteOffset = pSource->lOffset * 2; lByteOffset -= (lByteOffset % (lChannels * 2)); } else if (aluBytesFromFormat(pBuffer->eOriginalFormat) == 4) { lByteOffset = pSource->lOffset / 2; lByteOffset -= (lByteOffset % (lChannels * 2)); } else { lByteOffset = pSource->lOffset; lByteOffset -= (lByteOffset % (lChannels * 2)); } break; case AL_SAMPLE_OFFSET: lByteOffset = pSource->lOffset * lChannels * 2; break; case AL_SEC_OFFSET: // Note - lOffset is internally stored as Milliseconds lByteOffset = (ALint)(pSource->lOffset * lChannels * 2.0f * flBufferFreq / 1000.0f); lByteOffset -= (lByteOffset % (lChannels * 2)); break; } lTotalBufferDataSize = 0; pBufferList = pSource->queue; while (pBufferList) { if (pBufferList->buffer) lTotalBufferDataSize += pBufferList->buffer->size; pBufferList = pBufferList->next; } // Finally, if the ByteOffset is beyond the length of all the buffers in the queue, return -1 if (lByteOffset >= lTotalBufferDataSize) lByteOffset = -1; } return lByteOffset; } ALvoid ReleaseALSources(ALCcontext *Context) { while(Context->Source) { ALsource *temp = Context->Source; Context->Source = Context->Source->next; // Release source structure ALTHUNK_REMOVEENTRY(temp->source); memset(temp, 0, sizeof(ALsource)); free(temp); } Context->SourceCount = 0; }