/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* OpenSL ES private and global functions not associated with an interface or class */
#include "sles_allinclusive.h"
/** \brief Return true if the specified interface exists and has been initialized for this object.
* Returns false if the class does not support this kind of interface, or the class supports the
* interface but this particular object has not had the interface exposed at object creation time
* or by DynamicInterface::AddInterface. Note that the return value is not affected by whether
* the application has requested access to the interface with Object::GetInterface. Assumes on
* entry that the object is locked for either shared or exclusive access.
*/
bool IsInterfaceInitialized(IObject *thiz, unsigned MPH)
{
assert(NULL != thiz);
assert( /* (MPH_MIN <= MPH) && */ (MPH < (unsigned) MPH_MAX));
const ClassTable *clazz = thiz->mClass;
assert(NULL != clazz);
int index;
if (0 > (index = clazz->mMPH_to_index[MPH])) {
return false;
}
assert(MAX_INDEX >= clazz->mInterfaceCount);
assert(clazz->mInterfaceCount > (unsigned) index);
switch (thiz->mInterfaceStates[index]) {
case INTERFACE_EXPOSED:
case INTERFACE_ADDED:
return true;
default:
return false;
}
}
/** \brief Map an IObject to it's "object ID" (which is really a class ID) */
SLuint32 IObjectToObjectID(IObject *thiz)
{
assert(NULL != thiz);
// Note this returns the OpenSL ES object ID in preference to the OpenMAX AL if both available
const ClassTable *clazz = thiz->mClass;
assert(NULL != clazz);
SLuint32 id = clazz->mSLObjectID;
if (!id) {
id = clazz->mXAObjectID;
}
return id;
}
/** \brief Acquire a strong reference to an object.
* Check that object has the specified "object ID" (which is really a class ID) and is in the
* realized state. If so, then acquire a strong reference to it and return true.
* Otherwise return false.
*/
SLresult AcquireStrongRef(IObject *object, SLuint32 expectedObjectID)
{
if (NULL == object) {
return SL_RESULT_PARAMETER_INVALID;
}
// NTH additional validity checks on address here
SLresult result;
object_lock_exclusive(object);
SLuint32 actualObjectID = IObjectToObjectID(object);
if (expectedObjectID != actualObjectID) {
SL_LOGE("object %p has object ID %u but expected %u", object, actualObjectID,
expectedObjectID);
result = SL_RESULT_PARAMETER_INVALID;
} else if (SL_OBJECT_STATE_REALIZED != object->mState) {
SL_LOGE("object %p with object ID %u is not realized", object, actualObjectID);
result = SL_RESULT_PRECONDITIONS_VIOLATED;
} else {
++object->mStrongRefCount;
result = SL_RESULT_SUCCESS;
}
object_unlock_exclusive(object);
return result;
}
/** \brief Release a strong reference to an object.
* Entry condition: the object is locked.
* Exit condition: the object is unlocked.
* Finishes the destroy if needed.
*/
void ReleaseStrongRefAndUnlockExclusive(IObject *object)
{
#ifdef USE_DEBUG
assert(pthread_equal(pthread_self(), object->mOwner));
#endif
assert(0 < object->mStrongRefCount);
if ((0 == --object->mStrongRefCount) && (SL_OBJECT_STATE_DESTROYING == object->mState)) {
// FIXME do the destroy here - merge with IDestroy
// but can't do this until we move Destroy to the sync thread
// as Destroy is now a blocking operation, and to avoid a race
} else {
object_unlock_exclusive(object);
}
}
/** \brief Release a strong reference to an object.
* Entry condition: the object is unlocked.
* Exit condition: the object is unlocked.
* Finishes the destroy if needed.
*/
void ReleaseStrongRef(IObject *object)
{
assert(NULL != object);
object_lock_exclusive(object);
ReleaseStrongRefAndUnlockExclusive(object);
}
/** \brief Convert POSIX pthread error code to OpenSL ES result code */
SLresult err_to_result(int err)
{
if (EAGAIN == err || ENOMEM == err) {
return SL_RESULT_RESOURCE_ERROR;
}
if (0 != err) {
return SL_RESULT_INTERNAL_ERROR;
}
return SL_RESULT_SUCCESS;
}
/** \brief Check the interface IDs passed into a Create operation */
SLresult checkInterfaces(const ClassTable *clazz, SLuint32 numInterfaces,
const SLInterfaceID *pInterfaceIds, const SLboolean *pInterfaceRequired,
unsigned *pExposedMask, unsigned *pRequiredMask)
{
assert(NULL != clazz && NULL != pExposedMask);
// Initially no interfaces are exposed
unsigned exposedMask = 0;
unsigned requiredMask = 0;
const struct iid_vtable *interfaces = clazz->mInterfaces;
SLuint32 interfaceCount = clazz->mInterfaceCount;
SLuint32 i;
// Expose all implicit interfaces
for (i = 0; i < interfaceCount; ++i) {
switch (interfaces[i].mInterface) {
case INTERFACE_IMPLICIT:
case INTERFACE_IMPLICIT_PREREALIZE:
// there must be an initialization hook present
if (NULL != MPH_init_table[interfaces[i].mMPH].mInit) {
exposedMask |= 1 << i;
}
break;
case INTERFACE_EXPLICIT:
case INTERFACE_DYNAMIC:
case INTERFACE_UNAVAILABLE:
case INTERFACE_EXPLICIT_PREREALIZE:
break;
default:
assert(false);
break;
}
}
if (0 < numInterfaces) {
if (NULL == pInterfaceIds || NULL == pInterfaceRequired) {
return SL_RESULT_PARAMETER_INVALID;
}
bool anyRequiredButUnsupported = false;
// Loop for each requested interface
for (i = 0; i < numInterfaces; ++i) {
SLInterfaceID iid = pInterfaceIds[i];
if (NULL == iid) {
return SL_RESULT_PARAMETER_INVALID;
}
SLboolean isRequired = pInterfaceRequired[i];
int MPH, index;
if ((0 > (MPH = IID_to_MPH(iid))) ||
// there must be an initialization hook present
(NULL == MPH_init_table[MPH].mInit) ||
(0 > (index = clazz->mMPH_to_index[MPH])) ||
(INTERFACE_UNAVAILABLE == interfaces[index].mInterface)) {
// Here if interface was not found, or is not available for this object type
if (isRequired) {
// Application said it required the interface, so give up
SL_LOGE("class %s interface %u required but unavailable MPH=%d",
clazz->mName, i, MPH);
anyRequiredButUnsupported = true;
}
// Application said it didn't really need the interface, so ignore with warning
SL_LOGW("class %s interface %u requested but unavailable MPH=%d",
clazz->mName, i, MPH);
continue;
}
if (isRequired) {
requiredMask |= (1 << index);
}
// The requested interface was both found and available, so expose it
exposedMask |= (1 << index);
// Note that we ignore duplicate requests, including equal and aliased IDs
}
if (anyRequiredButUnsupported) {
return SL_RESULT_FEATURE_UNSUPPORTED;
}
}
*pExposedMask = exposedMask;
if (NULL != pRequiredMask) {
*pRequiredMask = requiredMask;
}
return SL_RESULT_SUCCESS;
}
/* Interface initialization hooks */
extern void
I3DCommit_init(void *),
I3DDoppler_init(void *),
I3DGrouping_init(void *),
I3DLocation_init(void *),
I3DMacroscopic_init(void *),
I3DSource_init(void *),
IAndroidAcousticEchoCancellation_init(void *),
IAndroidAutomaticGainControl_init(void *),
IAndroidConfiguration_init(void *),
IAndroidEffect_init(void *),
IAndroidEffectCapabilities_init(void *),
IAndroidEffectSend_init(void *),
IAndroidBufferQueue_init(void *),
IAudioDecoderCapabilities_init(void *),
IAudioEncoder_init(void *),
IAudioEncoderCapabilities_init(void *),
IAudioIODeviceCapabilities_init(void *),
IBassBoost_init(void *),
IBufferQueue_init(void *),
IDeviceVolume_init(void *),
IDynamicInterfaceManagement_init(void *),
IDynamicSource_init(void *),
IEffectSend_init(void *),
IEngine_init(void *),
IEngineCapabilities_init(void *),
IEnvironmentalReverb_init(void *),
IEqualizer_init(void *),
ILEDArray_init(void *),
IMIDIMessage_init(void *),
IMIDIMuteSolo_init(void *),
IMIDITempo_init(void *),
IMIDITime_init(void *),
IMetadataExtraction_init(void *),
IMetadataTraversal_init(void *),
IMuteSolo_init(void *),
IAndroidNoiseSuppression_init(void *),
IObject_init(void *),
IOutputMix_init(void *),
IOutputMixExt_init(void *),
IPitch_init(void *),
IPlay_init(void *),
IPlaybackRate_init(void *),
IPrefetchStatus_init(void *),
IPresetReverb_init(void *),
IRatePitch_init(void *),
IRecord_init(void *),
ISeek_init(void *),
IThreadSync_init(void *),
IVibra_init(void *),
IVirtualizer_init(void *),
IVisualization_init(void *),
IVolume_init(void *);
extern void
I3DGrouping_deinit(void *),
IAndroidAcousticEchoCancellation_deinit(void *),
IAndroidAutomaticGainControl_deinit(void *),
IAndroidEffect_deinit(void *),
IAndroidEffectCapabilities_deinit(void *),
IAndroidBufferQueue_deinit(void *),
IAndroidNoiseSuppression_deinit(void*),
IBassBoost_deinit(void *),
IBufferQueue_deinit(void *),
IEngine_deinit(void *),
IEnvironmentalReverb_deinit(void *),
IEqualizer_deinit(void *),
IObject_deinit(void *),
IPresetReverb_deinit(void *),
IThreadSync_deinit(void *),
IVirtualizer_deinit(void *),
IAndroidConfiguration_deinit(void *);
extern bool
IAndroidAcousticEchoCancellation_Expose(void *),
IAndroidAutomaticGainControl_Expose(void *),
IAndroidEffectCapabilities_Expose(void *),
IAndroidNoiseSuppression_Expose(void *),
IBassBoost_Expose(void *),
IEnvironmentalReverb_Expose(void *),
IEqualizer_Expose(void *),
IPresetReverb_Expose(void *),
IVirtualizer_Expose(void *);
extern void
IXAEngine_init(void *),
IStreamInformation_init(void*),
IVideoDecoderCapabilities_init(void *);
extern void
IXAEngine_deinit(void *),
IStreamInformation_deinit(void *),
IVideoDecoderCapabilities_deinit(void *);
extern bool
IVideoDecoderCapabilities_expose(void *);
#if !(USE_PROFILES & USE_PROFILES_MUSIC)
#define IDynamicSource_init NULL
#define IMetadataTraversal_init NULL
#define IVisualization_init NULL
#endif
#if !(USE_PROFILES & USE_PROFILES_GAME)
#define I3DCommit_init NULL
#define I3DDoppler_init NULL
#define I3DGrouping_init NULL
#define I3DLocation_init NULL
#define I3DMacroscopic_init NULL
#define I3DSource_init NULL
#define IMIDIMessage_init NULL
#define IMIDIMuteSolo_init NULL
#define IMIDITempo_init NULL
#define IMIDITime_init NULL
#define IPitch_init NULL
#define IRatePitch_init NULL
#define I3DGrouping_deinit NULL
#endif
#if !(USE_PROFILES & USE_PROFILES_BASE)
#define IAudioDecoderCapabilities_init NULL
#define IAudioEncoderCapabilities_init NULL
#define IAudioEncoder_init NULL
#define IAudioIODeviceCapabilities_init NULL
#define IDeviceVolume_init NULL
#define IEngineCapabilities_init NULL
#define IThreadSync_init NULL
#define IThreadSync_deinit NULL
#endif
#if !(USE_PROFILES & USE_PROFILES_OPTIONAL)
#define ILEDArray_init NULL
#define IVibra_init NULL
#endif
#ifndef ANDROID
#define IAndroidConfiguration_init NULL
#define IAndroidConfiguration_deinit NULL
#define IAndroidEffect_init NULL
#define IAndroidEffectCapabilities_init NULL
#define IAndroidEffectSend_init NULL
#define IAndroidEffect_deinit NULL
#define IAndroidEffectCapabilities_deinit NULL
#define IAndroidEffectCapabilities_Expose NULL
#define IAndroidBufferQueue_init NULL
#define IStreamInformation_init NULL
#define IAndroidBufferQueue_deinit NULL
#define IStreamInformation_deinit NULL
#endif
#ifndef USE_OUTPUTMIXEXT
#define IOutputMixExt_init NULL
#endif
/*static*/ const struct MPH_init MPH_init_table[MPH_MAX] = {
{ /* MPH_3DCOMMIT, */ I3DCommit_init, NULL, NULL, NULL, NULL },
{ /* MPH_3DDOPPLER, */ I3DDoppler_init, NULL, NULL, NULL, NULL },
{ /* MPH_3DGROUPING, */ I3DGrouping_init, NULL, I3DGrouping_deinit, NULL, NULL },
{ /* MPH_3DLOCATION, */ I3DLocation_init, NULL, NULL, NULL, NULL },
{ /* MPH_3DMACROSCOPIC, */ I3DMacroscopic_init, NULL, NULL, NULL, NULL },
{ /* MPH_3DSOURCE, */ I3DSource_init, NULL, NULL, NULL, NULL },
{ /* MPH_AUDIODECODERCAPABILITIES, */ IAudioDecoderCapabilities_init, NULL, NULL, NULL, NULL },
{ /* MPH_AUDIOENCODER, */ IAudioEncoder_init, NULL, NULL, NULL, NULL },
{ /* MPH_AUDIOENCODERCAPABILITIES, */ IAudioEncoderCapabilities_init, NULL, NULL, NULL, NULL },
{ /* MPH_AUDIOIODEVICECAPABILITIES, */ IAudioIODeviceCapabilities_init, NULL, NULL, NULL,
NULL },
{ /* MPH_BASSBOOST, */ IBassBoost_init, NULL, IBassBoost_deinit, IBassBoost_Expose, NULL },
{ /* MPH_BUFFERQUEUE, */ IBufferQueue_init, NULL, IBufferQueue_deinit, NULL, NULL },
{ /* MPH_DEVICEVOLUME, */ IDeviceVolume_init, NULL, NULL, NULL, NULL },
{ /* MPH_DYNAMICINTERFACEMANAGEMENT, */ IDynamicInterfaceManagement_init, NULL, NULL, NULL,
NULL },
{ /* MPH_DYNAMICSOURCE, */ IDynamicSource_init, NULL, NULL, NULL, NULL },
{ /* MPH_EFFECTSEND, */ IEffectSend_init, NULL, NULL, NULL, NULL },
{ /* MPH_ENGINE, */ IEngine_init, NULL, IEngine_deinit, NULL, NULL },
{ /* MPH_ENGINECAPABILITIES, */ IEngineCapabilities_init, NULL, NULL, NULL, NULL },
{ /* MPH_ENVIRONMENTALREVERB, */ IEnvironmentalReverb_init, NULL, IEnvironmentalReverb_deinit,
IEnvironmentalReverb_Expose, NULL },
{ /* MPH_EQUALIZER, */ IEqualizer_init, NULL, IEqualizer_deinit, IEqualizer_Expose, NULL },
{ /* MPH_LED, */ ILEDArray_init, NULL, NULL, NULL, NULL },
{ /* MPH_METADATAEXTRACTION, */ IMetadataExtraction_init, NULL, NULL, NULL, NULL },
{ /* MPH_METADATATRAVERSAL, */ IMetadataTraversal_init, NULL, NULL, NULL, NULL },
{ /* MPH_MIDIMESSAGE, */ IMIDIMessage_init, NULL, NULL, NULL, NULL },
{ /* MPH_MIDITIME, */ IMIDITime_init, NULL, NULL, NULL, NULL },
{ /* MPH_MIDITEMPO, */ IMIDITempo_init, NULL, NULL, NULL, NULL },
{ /* MPH_MIDIMUTESOLO, */ IMIDIMuteSolo_init, NULL, NULL, NULL, NULL },
{ /* MPH_MUTESOLO, */ IMuteSolo_init, NULL, NULL, NULL, NULL },
{ /* MPH_NULL, */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_OBJECT, */ IObject_init, NULL, IObject_deinit, NULL, NULL },
{ /* MPH_OUTPUTMIX, */ IOutputMix_init, NULL, NULL, NULL, NULL },
{ /* MPH_PITCH, */ IPitch_init, NULL, NULL, NULL, NULL },
{ /* MPH_PLAY, */ IPlay_init, NULL, NULL, NULL, NULL },
{ /* MPH_PLAYBACKRATE, */ IPlaybackRate_init, NULL, NULL, NULL, NULL },
{ /* MPH_PREFETCHSTATUS, */ IPrefetchStatus_init, NULL, NULL, NULL, NULL },
{ /* MPH_PRESETREVERB, */ IPresetReverb_init, NULL, IPresetReverb_deinit,
IPresetReverb_Expose, NULL },
{ /* MPH_RATEPITCH, */ IRatePitch_init, NULL, NULL, NULL, NULL },
{ /* MPH_RECORD, */ IRecord_init, NULL, NULL, NULL, NULL },
{ /* MPH_SEEK, */ ISeek_init, NULL, NULL, NULL, NULL },
{ /* MPH_THREADSYNC, */ IThreadSync_init, NULL, IThreadSync_deinit, NULL, NULL },
{ /* MPH_VIBRA, */ IVibra_init, NULL, NULL, NULL, NULL },
{ /* MPH_VIRTUALIZER, */ IVirtualizer_init, NULL, IVirtualizer_deinit, IVirtualizer_Expose,
NULL },
{ /* MPH_VISUALIZATION, */ IVisualization_init, NULL, NULL, NULL, NULL },
{ /* MPH_VOLUME, */ IVolume_init, NULL, NULL, NULL, NULL },
// Wilhelm desktop extended interfaces
{ /* MPH_OUTPUTMIXEXT, */ IOutputMixExt_init, NULL, NULL, NULL, NULL },
// Android API level 9 extended interfaces
{ /* MPH_ANDROIDEFFECT */ IAndroidEffect_init, NULL, IAndroidEffect_deinit, NULL, NULL },
{ /* MPH_ANDROIDEFFECTCAPABILITIES */ IAndroidEffectCapabilities_init, NULL,
IAndroidEffectCapabilities_deinit, IAndroidEffectCapabilities_Expose, NULL },
{ /* MPH_ANDROIDEFFECTSEND */ IAndroidEffectSend_init, NULL, NULL, NULL, NULL },
{ /* MPH_ANDROIDCONFIGURATION */ IAndroidConfiguration_init, NULL, IAndroidConfiguration_deinit,
NULL, NULL },
{ /* MPH_ANDROIDSIMPLEBUFFERQUEUE */ IBufferQueue_init /* alias */, NULL, NULL, NULL, NULL },
// Android API level 10 extended interfaces
{ /* MPH_ANDROIDBUFFERQUEUESOURCE */ IAndroidBufferQueue_init, NULL, IAndroidBufferQueue_deinit,
NULL, NULL },
// OpenMAX AL 1.0.1 interfaces
{ /* MPH_XAAUDIODECODERCAPABILITIES */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAAUDIOENCODER */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAAUDIOENCODERCAPABILITIES */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAAUDIOIODEVICECAPABILITIES */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XACAMERA */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XACAMERACAPABILITIES */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XACONFIGEXTENSION */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XADEVICEVOLUME */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XADYNAMICINTERFACEMANAGEMENT 59 */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XADYNAMICSOURCE */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAENGINE */ IXAEngine_init, NULL, IXAEngine_deinit, NULL, NULL },
{ /* MPH_XAEQUALIZER */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAIMAGECONTROLS */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAIMAGEDECODERCAPABILITIES */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAIMAGEEFFECTS */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAIMAGEENCODER */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAIMAGEENCODERCAPABILITIES */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XALED */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAMETADATAEXTRACTION */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAMETADATAINSERTION */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAMETADATATRAVERSAL */ NULL, NULL, NULL, NULL, NULL },
// { /* MPH_XANULL */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAOBJECT */ IObject_init, NULL, IObject_deinit, NULL, NULL },
{ /* MPH_XAOUTPUTMIX */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAPLAY */ IPlay_init, NULL, NULL, NULL, NULL },
{ /* MPH_XAPLAYBACKRATE */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAPREFETCHSTATUS, */ IPrefetchStatus_init, NULL, NULL, NULL, NULL },
{ /* MPH_XARADIO */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XARDS */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XARECORD */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XASEEK */ ISeek_init, NULL, NULL, NULL, NULL },
{ /* MPH_XASNAPSHOT */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XASTREAMINFORMATION */ IStreamInformation_init, NULL, IStreamInformation_deinit,
NULL, NULL },
{ /* MPH_XATHREADSYNC */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAVIBRA */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAVIDEODECODERCAPABILITIES */ IVideoDecoderCapabilities_init, NULL,
IVideoDecoderCapabilities_deinit, IVideoDecoderCapabilities_expose, NULL },
{ /* MPH_XAVIDEOENCODER */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAVIDEOENCODERCAPABILITIES */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAVIDEOPOSTPROCESSING */ NULL, NULL, NULL, NULL, NULL },
{ /* MPH_XAVOLUME, */ IVolume_init, NULL, NULL, NULL, NULL },
{ /* MPH_ANDROIDACOUSTICECHOCANCELLATION, */ IAndroidAcousticEchoCancellation_init, NULL,
IAndroidAcousticEchoCancellation_deinit, IAndroidAcousticEchoCancellation_Expose,
NULL },
{ /* MPH_ANDROIDAUTOMATICGAINCONTROL, */ IAndroidAutomaticGainControl_init, NULL,
IAndroidAutomaticGainControl_deinit, IAndroidAutomaticGainControl_Expose, NULL },
{ /* MPH_ANDROIDNOISESUPPRESSION, */ IAndroidNoiseSuppression_init, NULL,
IAndroidNoiseSuppression_deinit, IAndroidNoiseSuppression_Expose, NULL },
};
/** \brief Construct a new instance of the specified class, exposing selected interfaces */
IObject *construct(const ClassTable *clazz, unsigned exposedMask, SLEngineItf engine)
{
IObject *thiz;
// Do not change this to malloc; we depend on the object being memset to zero
thiz = (IObject *) calloc(1, clazz->mSize);
if (NULL != thiz) {
SL_LOGV("construct %s at %p", clazz->mName, thiz);
unsigned lossOfControlMask = 0;
// a NULL engine means we are constructing the engine
IEngine *thisEngine = (IEngine *) engine;
if (NULL == thisEngine) {
// thisEngine = &((CEngine *) thiz)->mEngine;
thiz->mEngine = (CEngine *) thiz;
} else {
thiz->mEngine = (CEngine *) thisEngine->mThis;
interface_lock_exclusive(thisEngine);
if (MAX_INSTANCE <= thisEngine->mInstanceCount) {
SL_LOGE("Too many objects");
interface_unlock_exclusive(thisEngine);
free(thiz);
return NULL;
}
// pre-allocate a pending slot, but don't assign bit from mInstanceMask yet
++thisEngine->mInstanceCount;
assert(((unsigned) ~0) != thisEngine->mInstanceMask);
interface_unlock_exclusive(thisEngine);
// const, no lock needed
if (thisEngine->mLossOfControlGlobal) {
lossOfControlMask = ~0;
}
}
thiz->mLossOfControlMask = lossOfControlMask;
thiz->mClass = clazz;
const struct iid_vtable *x = clazz->mInterfaces;
SLuint8 *interfaceStateP = thiz->mInterfaceStates;
SLuint32 index;
for (index = 0; index < clazz->mInterfaceCount; ++index, ++x, exposedMask >>= 1) {
SLuint8 state;
// initialize all interfaces with init hooks, even if not exposed
const struct MPH_init *mi = &MPH_init_table[x->mMPH];
VoidHook init = mi->mInit;
if (NULL != init) {
void *self = (char *) thiz + x->mOffset;
// IObject does not have an mThis, so [1] is not always defined
if (index) {
((IObject **) self)[1] = thiz;
}
// call the initialization hook
(*init)(self);
// IObject does not require a call to GetInterface
if (index) {
// This trickery invalidates the v-table until GetInterface
((size_t *) self)[0] ^= ~0;
}
// if interface is exposed, also call the optional expose hook
BoolHook expose;
state = (exposedMask & 1) && ((NULL == (expose = mi->mExpose)) || (*expose)(self)) ?
INTERFACE_EXPOSED : INTERFACE_INITIALIZED;
// FIXME log or report to application if an expose hook on a
// required explicit interface fails at creation time
} else {
state = INTERFACE_UNINITIALIZED;
}
*interfaceStateP++ = state;
}
// note that the new object is not yet published; creator must call IObject_Publish
}
return thiz;
}