media/libeffects/factory/EffectsFactory.c - LeafOS-Project/android_frameworks_av - Gitiles

 /*
  * 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.
  */

 #define LOG_TAG "EffectsFactory"
 //#define LOG_NDEBUG 0

 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>

 #include <cutils/properties.h>
 #include <log/log.h>

 #include <media/EffectsFactoryApi.h>

 #include "EffectsConfigLoader.h"
 #include "EffectsFactoryState.h"
 #include "EffectsXmlConfigLoader.h"

 #include "EffectsFactory.h"

 static list_elem_t *gEffectList; // list of effect_entry_t: all currently created effects
 static uint32_t gNumEffects;         // total number number of effects
 static list_elem_t *gCurLib;    // current library in enumeration process
 static list_elem_t *gCurEffect; // current effect in enumeration process
 static uint32_t gCurEffectIdx;       // current effect index in enumeration process
 /** Number of elements skipped during the effects configuration loading.
  *  -1 if the config loader failed
  *  -2 if config load was skipped
  */
 static ssize_t gConfigNbElemSkipped = -2;

 static int gInitDone; // true is global initialization has been preformed
 static int gCanQueryEffect; // indicates that call to EffectQueryEffect() is valid, i.e. that the list of effects
                           // was not modified since last call to EffectQueryNumberEffects()
 /////////////////////////////////////////////////
 //      Local functions prototypes
 /////////////////////////////////////////////////

 static int init();
 static void resetEffectEnumeration();
 static uint32_t updateNumEffects();
 // To search a subeffect in the gSubEffectList
 static int findSubEffect(const effect_uuid_t *uuid,
                lib_entry_t **lib,
                effect_descriptor_t **desc);

 /////////////////////////////////////////////////
 //      Effect Control Interface functions
 /////////////////////////////////////////////////

 int Effect_Process(effect_handle_t self, audio_buffer_t *inBuffer, audio_buffer_t *outBuffer)
 {
     int ret = init();
     if (ret < 0) {
         return ret;
     }
     effect_entry_t *fx = (effect_entry_t *)self;
     pthread_mutex_lock(&gLibLock);
     if (fx->lib == NULL) {
         pthread_mutex_unlock(&gLibLock);
         return -EPIPE;
     }
     pthread_mutex_lock(&fx->lib->lock);
     pthread_mutex_unlock(&gLibLock);

     ret = (*fx->subItfe)->process(fx->subItfe, inBuffer, outBuffer);
     pthread_mutex_unlock(&fx->lib->lock);
     return ret;
 }

 int Effect_Command(effect_handle_t self,
                    uint32_t cmdCode,
                    uint32_t cmdSize,
                    void *pCmdData,
                    uint32_t *replySize,
                    void *pReplyData)
 {
     int ret = init();
     if (ret < 0) {
         return ret;
     }
     effect_entry_t *fx = (effect_entry_t *)self;
     pthread_mutex_lock(&gLibLock);
     if (fx->lib == NULL) {
         pthread_mutex_unlock(&gLibLock);
         return -EPIPE;
     }
     pthread_mutex_lock(&fx->lib->lock);
     pthread_mutex_unlock(&gLibLock);

     ret = (*fx->subItfe)->command(fx->subItfe, cmdCode, cmdSize, pCmdData, replySize, pReplyData);
     pthread_mutex_unlock(&fx->lib->lock);
     return ret;
 }

 int Effect_GetDescriptor(effect_handle_t self,
                          effect_descriptor_t *desc)
 {
     int ret = init();
     if (ret < 0) {
         return ret;
     }
     effect_entry_t *fx = (effect_entry_t *)self;
     pthread_mutex_lock(&gLibLock);
     if (fx->lib == NULL) {
         pthread_mutex_unlock(&gLibLock);
         return -EPIPE;
     }
     pthread_mutex_lock(&fx->lib->lock);
     pthread_mutex_unlock(&gLibLock);

     ret = (*fx->subItfe)->get_descriptor(fx->subItfe, desc);
     pthread_mutex_unlock(&fx->lib->lock);
     return ret;
 }

 int Effect_ProcessReverse(effect_handle_t self, audio_buffer_t *inBuffer, audio_buffer_t *outBuffer)
 {
     int ret = init();
     if (ret < 0) {
         return ret;
     }
     effect_entry_t *fx = (effect_entry_t *)self;
     pthread_mutex_lock(&gLibLock);
     if (fx->lib == NULL) {
         pthread_mutex_unlock(&gLibLock);
         return -EPIPE;
     }
     pthread_mutex_lock(&fx->lib->lock);
     pthread_mutex_unlock(&gLibLock);

     if ((*fx->subItfe)->process_reverse != NULL) {
         ret = (*fx->subItfe)->process_reverse(fx->subItfe, inBuffer, outBuffer);
     } else {
         ret = -ENOSYS;
     }
     pthread_mutex_unlock(&fx->lib->lock);
     return ret;
 }


 const struct effect_interface_s gInterface = {
         Effect_Process,
         Effect_Command,
         Effect_GetDescriptor,
         NULL
 };

 const struct effect_interface_s gInterfaceWithReverse = {
         Effect_Process,
         Effect_Command,
         Effect_GetDescriptor,
         Effect_ProcessReverse
 };

 /////////////////////////////////////////////////
 //      Effect Factory Interface functions
 /////////////////////////////////////////////////

 int EffectQueryNumberEffects(uint32_t *pNumEffects)
 {
     int ret = init();
     if (ret < 0) {
         return ret;
     }
     if (pNumEffects == NULL) {
         return -EINVAL;
     }

     pthread_mutex_lock(&gLibLock);
     *pNumEffects = gNumEffects;
     gCanQueryEffect = 1;
     pthread_mutex_unlock(&gLibLock);
     ALOGV("EffectQueryNumberEffects(): %d", *pNumEffects);
     return ret;
 }

 int EffectQueryEffect(uint32_t index, effect_descriptor_t *pDescriptor)
 {
     int ret = init();
     if (ret < 0) {
         return ret;
     }
     if (pDescriptor == NULL ||
         index >= gNumEffects) {
         return -EINVAL;
     }
     if (gCanQueryEffect == 0) {
         return -ENOSYS;
     }

     pthread_mutex_lock(&gLibLock);
     ret = -ENOENT;
     if (index < gCurEffectIdx) {
         resetEffectEnumeration();
     }
     while (gCurLib) {
         if (gCurEffect) {
             if (index == gCurEffectIdx) {
                 *pDescriptor = *(effect_descriptor_t *)gCurEffect->object;
                 ret = 0;
                 break;
             } else {
                 gCurEffect = gCurEffect->next;
                 gCurEffectIdx++;
             }
         } else {
             gCurLib = gCurLib->next;
             gCurEffect = ((lib_entry_t *)gCurLib->object)->effects;
         }
     }

 #if (LOG_NDEBUG == 0)
     char str[512];
     dumpEffectDescriptor(pDescriptor, str, sizeof(str), 0 /* indent */);
     ALOGV("EffectQueryEffect() desc:%s", str);
 #endif
     pthread_mutex_unlock(&gLibLock);
     return ret;
 }

 int EffectGetDescriptor(const effect_uuid_t *uuid, effect_descriptor_t *pDescriptor)
 {
     lib_entry_t *l = NULL;
     effect_descriptor_t *d = NULL;

     int ret = init();
     if (ret < 0) {
         return ret;
     }
     if (pDescriptor == NULL || uuid == NULL) {
         return -EINVAL;
     }
     pthread_mutex_lock(&gLibLock);
     ret = findEffect(NULL, uuid, &l, &d);
     if (ret == 0) {
         *pDescriptor = *d;
     }
     pthread_mutex_unlock(&gLibLock);
     return ret;
 }

 int doEffectCreate(const effect_uuid_t *uuid, int32_t sessionId, int32_t ioId, int32_t deviceId,
         effect_handle_t *pHandle)
 {
     list_elem_t *e = gLibraryList;
     lib_entry_t *l = NULL;
     effect_descriptor_t *d = NULL;
     effect_handle_t itfe;
     effect_entry_t *fx;
     int ret;

     if (uuid == NULL || pHandle == NULL) {
         return -EINVAL;
     }

     ALOGV("EffectCreate() UUID: %08X-%04X-%04X-%04X-%02X%02X%02X%02X%02X%02X\n",
           uuid->timeLow, uuid->timeMid, uuid->timeHiAndVersion,
           uuid->clockSeq, uuid->node[0], uuid->node[1], uuid->node[2],
           uuid->node[3], uuid->node[4], uuid->node[5]);

     ret = init();

     if (ret < 0) {
         ALOGW("EffectCreate() init error: %d", ret);
         return ret;
     }

     pthread_mutex_lock(&gLibLock);

     ret = findEffect(NULL, uuid, &l, &d);
     if (ret < 0) {
         // Sub effects are not associated with the library->effects,
         // so, findEffect will fail. Search for the effect in gSubEffectList.
         ret = findSubEffect(uuid, &l, &d);
         if (ret < 0) {
             goto exit;
         }
     }

     // create effect in library
     if (sessionId == AUDIO_SESSION_DEVICE) {
         if (l->desc->version >= EFFECT_LIBRARY_API_VERSION_3_1) {
             ALOGI("EffectCreate() create_effect_3_1");
             ret = l->desc->create_effect_3_1(uuid, sessionId, ioId, deviceId, &itfe);
         } else {
             ALOGE("EffectCreate() cannot create device effect on library with API version < 3.1");
             ret = -ENOSYS;
         }
     } else {
         ALOGI("EffectCreate() create_effect");
         ret = l->desc->create_effect(uuid, sessionId, ioId, &itfe);
     }

     if (ret != 0) {
         ALOGW("EffectCreate() library %s: could not create fx %s, error %d", l->name, d->name, ret);
         goto exit;
     }

     // add entry to effect list
     fx = (effect_entry_t *)malloc(sizeof(effect_entry_t));
     fx->subItfe = itfe;
     if ((*itfe)->process_reverse != NULL) {
         fx->itfe = (struct effect_interface_s *)&gInterfaceWithReverse;
         ALOGV("EffectCreate() gInterfaceWithReverse");
     }   else {
         fx->itfe = (struct effect_interface_s *)&gInterface;
         ALOGV("EffectCreate() gInterface");
     }
     fx->lib = l;

     e = (list_elem_t *)malloc(sizeof(list_elem_t));
     e->object = fx;
     e->next = gEffectList;
     gEffectList = e;

     *pHandle = (effect_handle_t)fx;

     ALOGV("EffectCreate() created entry %p with sub itfe %p in library %s", *pHandle, itfe, l->name);

 exit:
     pthread_mutex_unlock(&gLibLock);
     return ret;
 }

 int EffectCreate(const effect_uuid_t *uuid, int32_t sessionId, int32_t ioId,
         effect_handle_t *pHandle) {
     return doEffectCreate(uuid, sessionId, ioId, AUDIO_PORT_HANDLE_NONE, pHandle);
 }

 int EffectCreateOnDevice(const effect_uuid_t *uuid, int32_t deviceId, int32_t ioId,
         effect_handle_t *pHandle) {
     return doEffectCreate(uuid, AUDIO_SESSION_DEVICE, ioId, deviceId, pHandle);
 }

 int EffectRelease(effect_handle_t handle)
 {
     effect_entry_t *fx;
     list_elem_t *e1;
     list_elem_t *e2;

     int ret = init();
     if (ret < 0) {
         return ret;
     }

     // remove effect from effect list
     pthread_mutex_lock(&gLibLock);
     e1 = gEffectList;
     e2 = NULL;
     while (e1) {
         if (e1->object == handle) {
             if (e2) {
                 e2->next = e1->next;
             } else {
                 gEffectList = e1->next;
             }
             fx = (effect_entry_t *)e1->object;
             free(e1);
             break;
         }
         e2 = e1;
         e1 = e1->next;
     }
     if (e1 == NULL) {
         ret = -ENOENT;
         goto exit;
     }

     // release effect in library
     if (fx->lib == NULL) {
         ALOGW("EffectRelease() fx %p library already unloaded", handle);
     } else {
         pthread_mutex_lock(&fx->lib->lock);
         fx->lib->desc->release_effect(fx->subItfe);
         pthread_mutex_unlock(&fx->lib->lock);
     }
     free(fx);

 exit:
     pthread_mutex_unlock(&gLibLock);
     return ret;
 }

 int EffectIsNullUuid(const effect_uuid_t *uuid)
 {
     if (memcmp(uuid, EFFECT_UUID_NULL, sizeof(effect_uuid_t))) {
         return 0;
     }
     return 1;
 }

 // Function to get the sub effect descriptors of the effect whose uuid
 // is pointed by the first argument. It searches the gSubEffectList for the
 // matching uuid and then copies the corresponding sub effect descriptors
 // to the inout param
 int EffectGetSubEffects(const effect_uuid_t *uuid, sub_effect_entry_t **pSube,
                         size_t size)
 {
    ALOGV("EffectGetSubEffects() UUID: %08X-%04X-%04X-%04X-%02X%02X%02X%02X%02X"
           "%02X\n",uuid->timeLow, uuid->timeMid, uuid->timeHiAndVersion,
           uuid->clockSeq, uuid->node[0], uuid->node[1],uuid->node[2],
           uuid->node[3],uuid->node[4],uuid->node[5]);

    // Check if the size of the desc buffer is large enough for 2 subeffects
    if ((uuid == NULL) || (pSube == NULL) || (size < 2)) {
        ALOGW("NULL pointer or insufficient memory. Cannot query subeffects");
        return -EINVAL;
    }
    int ret = init();
    if (ret < 0)
       return ret;
    list_sub_elem_t *e = gSubEffectList;
    sub_effect_entry_t *subeffect;
    effect_descriptor_t *d;
    int count = 0;
    while (e != NULL) {
        d = (effect_descriptor_t*)e->object;
        if (memcmp(uuid, &d->uuid, sizeof(effect_uuid_t)) == 0) {
            ALOGV("EffectGetSubEffects: effect found in the list");
            list_elem_t *subefx = e->sub_elem;
            while (subefx != NULL) {
                subeffect = (sub_effect_entry_t*)subefx->object;
                pSube[count++] = subeffect;
                subefx = subefx->next;
            }
            ALOGV("EffectGetSubEffects end - copied the sub effect structures");
            return count;
        }
        e = e->next;
    }
    return -ENOENT;
 }
 /////////////////////////////////////////////////
 //      Local functions
 /////////////////////////////////////////////////

 int init() {
     if (gInitDone) {
         return 0;
     }

     // ignore effects or not?
     const bool ignoreFxConfFiles = property_get_bool(PROPERTY_IGNORE_EFFECTS, false);

     pthread_mutex_init(&gLibLock, NULL);

     if (ignoreFxConfFiles) {
         ALOGI("Audio effects in configuration files will be ignored");
     } else {
         gConfigNbElemSkipped = EffectLoadXmlEffectConfig(NULL);
         if (gConfigNbElemSkipped < 0) {
             ALOGW("Failed to load XML effect configuration, fallback to .conf");
             EffectLoadEffectConfig();
         } else if (gConfigNbElemSkipped > 0) {
             ALOGE("Effect config is partially invalid, skipped %zd elements", gConfigNbElemSkipped);
         }
     }

     updateNumEffects();
     gInitDone = 1;
     ALOGV("init() done");
     return 0;
 }

 // Searches the sub effect matching to the specified uuid
 // in the gSubEffectList. It gets the lib_entry_t for
 // the matched sub_effect . Used in EffectCreate of sub effects
 int findSubEffect(const effect_uuid_t *uuid,
                lib_entry_t **lib,
                effect_descriptor_t **desc)
 {
     list_sub_elem_t *e = gSubEffectList;
     list_elem_t *subefx;
     sub_effect_entry_t *effect;
     lib_entry_t *l = NULL;
     effect_descriptor_t *d = NULL;
     int found = 0;
     int ret = 0;

     if (uuid == NULL)
         return -EINVAL;

     while (e != NULL && !found) {
         subefx = (list_elem_t*)(e->sub_elem);
         while (subefx != NULL) {
             effect = (sub_effect_entry_t*)subefx->object;
             l = (lib_entry_t *)effect->lib;
             d = (effect_descriptor_t *)effect->object;
             if (memcmp(&d->uuid, uuid, sizeof(effect_uuid_t)) == 0) {
                 ALOGV("uuid matched");
                 found = 1;
                 break;
             }
             subefx = subefx->next;
         }
         e = e->next;
     }
     if (!found) {
         ALOGV("findSubEffect() effect not found");
         ret = -ENOENT;
     } else {
         ALOGV("findSubEffect() found effect: %s in lib %s", d->name, l->name);
         *lib = l;
         if (desc != NULL) {
             *desc = d;
         }
     }
     return ret;
 }

 void resetEffectEnumeration()
 {
     gCurLib = gLibraryList;
     gCurEffect = NULL;
     if (gCurLib) {
         gCurEffect = ((lib_entry_t *)gCurLib->object)->effects;
     }
     gCurEffectIdx = 0;
 }

 uint32_t updateNumEffects() {
     list_elem_t *e;
     uint32_t cnt = 0;

     resetEffectEnumeration();

     e = gLibraryList;
     while (e) {
         lib_entry_t *l = (lib_entry_t *)e->object;
         list_elem_t *efx = l->effects;
         while (efx) {
             cnt++;
             efx = efx->next;
         }
         e = e->next;
     }
     gNumEffects = cnt;
     gCanQueryEffect = 0;
     return cnt;
 }

 int EffectDumpEffects(int fd) {
     char s[512];

     list_elem_t *fe = gLibraryFailedList;
     lib_failed_entry_t *fl = NULL;

     dprintf(fd, "Libraries NOT loaded:\n");

     while (fe) {
         fl = (lib_failed_entry_t *)fe->object;
         dprintf(fd, " Library %s\n", fl->name);
         dprintf(fd, "  path: %s\n", fl->path);
         fe = fe->next;
     }

     list_elem_t *e = gLibraryList;
     lib_entry_t *l = NULL;
     effect_descriptor_t *d = NULL;
     int ret = 0;

     dprintf(fd, "Libraries loaded:\n");
     while (e) {
         l = (lib_entry_t *)e->object;
         list_elem_t *efx = l->effects;
         dprintf(fd, " Library %s\n", l->name);
         dprintf(fd, "  path: %s\n", l->path);
         if (!efx) {
             dprintf(fd, "  (no effects)\n");
         }
         while (efx) {
             d = (effect_descriptor_t *)efx->object;
             dumpEffectDescriptor(d, s, sizeof(s), 2);
             dprintf(fd, "%s", s);
             efx = efx->next;
         }
         e = e->next;
     }

     e = gSkippedEffects;
     if (e) {
         dprintf(fd, "Skipped effects\n");
         while(e) {
             d = (effect_descriptor_t *)e->object;
             dumpEffectDescriptor(d, s, sizeof(s), 2 /* indent */);
             dprintf(fd, "%s", s);
             e = e->next;
         }
     }
     switch (gConfigNbElemSkipped) {
     case -2:
         dprintf(fd, "Effect configuration loading skipped.\n");
         break;
     case -1:
         dprintf(fd, "XML effect configuration failed to load.\n");
         break;
     case 0:
         dprintf(fd, "XML effect configuration loaded successfully.\n");
         break;
     default:
         dprintf(fd, "XML effect configuration partially loaded, skipped %zd elements.\n",
                 gConfigNbElemSkipped);
     }
     return ret;
 }
	/*
	* 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.
	*/

	#define LOG_TAG "EffectsFactory"
	//#define LOG_NDEBUG 0

	#include <stdlib.h>
	#include <string.h>
	#include <unistd.h>

	#include <cutils/properties.h>
	#include <log/log.h>

	#include <media/EffectsFactoryApi.h>

	#include "EffectsConfigLoader.h"
	#include "EffectsFactoryState.h"
	#include "EffectsXmlConfigLoader.h"

	#include "EffectsFactory.h"

	static list_elem_t *gEffectList; // list of effect_entry_t: all currently created effects
	static uint32_t gNumEffects; // total number number of effects
	static list_elem_t *gCurLib; // current library in enumeration process
	static list_elem_t *gCurEffect; // current effect in enumeration process
	static uint32_t gCurEffectIdx; // current effect index in enumeration process
	/** Number of elements skipped during the effects configuration loading.
	* -1 if the config loader failed
	* -2 if config load was skipped
	*/
	static ssize_t gConfigNbElemSkipped = -2;

	static int gInitDone; // true is global initialization has been preformed
	static int gCanQueryEffect; // indicates that call to EffectQueryEffect() is valid, i.e. that the list of effects
	// was not modified since last call to EffectQueryNumberEffects()
	/////////////////////////////////////////////////
	// Local functions prototypes
	/////////////////////////////////////////////////

	static int init();
	static void resetEffectEnumeration();
	static uint32_t updateNumEffects();
	// To search a subeffect in the gSubEffectList
	static int findSubEffect(const effect_uuid_t *uuid,
	lib_entry_t **lib,
	effect_descriptor_t **desc);

	/////////////////////////////////////////////////
	// Effect Control Interface functions
	/////////////////////////////////////////////////

	int Effect_Process(effect_handle_t self, audio_buffer_t inBuffer, audio_buffer_t outBuffer)
	{
	int ret = init();
	if (ret < 0) {
	return ret;
	}
	effect_entry_t fx = (effect_entry_t )self;
	pthread_mutex_lock(&gLibLock);
	if (fx->lib == NULL) {
	pthread_mutex_unlock(&gLibLock);
	return -EPIPE;
	}
	pthread_mutex_lock(&fx->lib->lock);
	pthread_mutex_unlock(&gLibLock);

	ret = (*fx->subItfe)->process(fx->subItfe, inBuffer, outBuffer);
	pthread_mutex_unlock(&fx->lib->lock);
	return ret;
	}

	int Effect_Command(effect_handle_t self,
	uint32_t cmdCode,
	uint32_t cmdSize,
	void *pCmdData,
	uint32_t *replySize,
	void *pReplyData)
	{
	int ret = init();
	if (ret < 0) {
	return ret;
	}
	effect_entry_t fx = (effect_entry_t )self;
	pthread_mutex_lock(&gLibLock);
	if (fx->lib == NULL) {
	pthread_mutex_unlock(&gLibLock);
	return -EPIPE;
	}
	pthread_mutex_lock(&fx->lib->lock);
	pthread_mutex_unlock(&gLibLock);

	ret = (*fx->subItfe)->command(fx->subItfe, cmdCode, cmdSize, pCmdData, replySize, pReplyData);
	pthread_mutex_unlock(&fx->lib->lock);
	return ret;
	}

	int Effect_GetDescriptor(effect_handle_t self,
	effect_descriptor_t *desc)
	{
	int ret = init();
	if (ret < 0) {
	return ret;
	}
	effect_entry_t fx = (effect_entry_t )self;
	pthread_mutex_lock(&gLibLock);
	if (fx->lib == NULL) {
	pthread_mutex_unlock(&gLibLock);
	return -EPIPE;
	}
	pthread_mutex_lock(&fx->lib->lock);
	pthread_mutex_unlock(&gLibLock);

	ret = (*fx->subItfe)->get_descriptor(fx->subItfe, desc);
	pthread_mutex_unlock(&fx->lib->lock);
	return ret;
	}

	int Effect_ProcessReverse(effect_handle_t self, audio_buffer_t inBuffer, audio_buffer_t outBuffer)
	{
	int ret = init();
	if (ret < 0) {
	return ret;
	}
	effect_entry_t fx = (effect_entry_t )self;
	pthread_mutex_lock(&gLibLock);
	if (fx->lib == NULL) {
	pthread_mutex_unlock(&gLibLock);
	return -EPIPE;
	}
	pthread_mutex_lock(&fx->lib->lock);
	pthread_mutex_unlock(&gLibLock);

	if ((*fx->subItfe)->process_reverse != NULL) {
	ret = (*fx->subItfe)->process_reverse(fx->subItfe, inBuffer, outBuffer);
	} else {
	ret = -ENOSYS;
	}
	pthread_mutex_unlock(&fx->lib->lock);
	return ret;
	}


	const struct effect_interface_s gInterface = {
	Effect_Process,
	Effect_Command,
	Effect_GetDescriptor,
	NULL
	};

	const struct effect_interface_s gInterfaceWithReverse = {
	Effect_Process,
	Effect_Command,
	Effect_GetDescriptor,
	Effect_ProcessReverse
	};

	/////////////////////////////////////////////////
	// Effect Factory Interface functions
	/////////////////////////////////////////////////

	int EffectQueryNumberEffects(uint32_t *pNumEffects)
	{
	int ret = init();
	if (ret < 0) {
	return ret;
	}
	if (pNumEffects == NULL) {
	return -EINVAL;
	}

	pthread_mutex_lock(&gLibLock);
	*pNumEffects = gNumEffects;
	gCanQueryEffect = 1;
	pthread_mutex_unlock(&gLibLock);
	ALOGV("EffectQueryNumberEffects(): %d", *pNumEffects);
	return ret;
	}

	int EffectQueryEffect(uint32_t index, effect_descriptor_t *pDescriptor)
	{
	int ret = init();
	if (ret < 0) {
	return ret;
	}
	if (pDescriptor == NULL \|\|
	index >= gNumEffects) {
	return -EINVAL;
	}
	if (gCanQueryEffect == 0) {
	return -ENOSYS;
	}

	pthread_mutex_lock(&gLibLock);
	ret = -ENOENT;
	if (index < gCurEffectIdx) {
	resetEffectEnumeration();
	}
	while (gCurLib) {
	if (gCurEffect) {
	if (index == gCurEffectIdx) {
	pDescriptor = (effect_descriptor_t *)gCurEffect->object;
	ret = 0;
	break;
	} else {
	gCurEffect = gCurEffect->next;
	gCurEffectIdx++;
	}
	} else {
	gCurLib = gCurLib->next;
	gCurEffect = ((lib_entry_t *)gCurLib->object)->effects;
	}
	}

	#if (LOG_NDEBUG == 0)
	char str[512];
	dumpEffectDescriptor(pDescriptor, str, sizeof(str), 0 /* indent */);
	ALOGV("EffectQueryEffect() desc:%s", str);
	#endif
	pthread_mutex_unlock(&gLibLock);
	return ret;
	}

	int EffectGetDescriptor(const effect_uuid_t uuid, effect_descriptor_t pDescriptor)
	{
	lib_entry_t *l = NULL;
	effect_descriptor_t *d = NULL;

	int ret = init();
	if (ret < 0) {
	return ret;
	}
	if (pDescriptor == NULL \|\| uuid == NULL) {
	return -EINVAL;
	}
	pthread_mutex_lock(&gLibLock);
	ret = findEffect(NULL, uuid, &l, &d);
	if (ret == 0) {
	pDescriptor = d;
	}
	pthread_mutex_unlock(&gLibLock);
	return ret;
	}

	int doEffectCreate(const effect_uuid_t *uuid, int32_t sessionId, int32_t ioId, int32_t deviceId,
	effect_handle_t *pHandle)
	{
	list_elem_t *e = gLibraryList;
	lib_entry_t *l = NULL;
	effect_descriptor_t *d = NULL;
	effect_handle_t itfe;
	effect_entry_t *fx;
	int ret;

	if (uuid == NULL \|\| pHandle == NULL) {
	return -EINVAL;
	}

	ALOGV("EffectCreate() UUID: %08X-%04X-%04X-%04X-%02X%02X%02X%02X%02X%02X\n",
	uuid->timeLow, uuid->timeMid, uuid->timeHiAndVersion,
	uuid->clockSeq, uuid->node[0], uuid->node[1], uuid->node[2],
	uuid->node[3], uuid->node[4], uuid->node[5]);

	ret = init();

	if (ret < 0) {
	ALOGW("EffectCreate() init error: %d", ret);
	return ret;
	}

	pthread_mutex_lock(&gLibLock);

	ret = findEffect(NULL, uuid, &l, &d);
	if (ret < 0) {
	// Sub effects are not associated with the library->effects,
	// so, findEffect will fail. Search for the effect in gSubEffectList.
	ret = findSubEffect(uuid, &l, &d);
	if (ret < 0) {
	goto exit;
	}
	}

	// create effect in library
	if (sessionId == AUDIO_SESSION_DEVICE) {
	if (l->desc->version >= EFFECT_LIBRARY_API_VERSION_3_1) {
	ALOGI("EffectCreate() create_effect_3_1");
	ret = l->desc->create_effect_3_1(uuid, sessionId, ioId, deviceId, &itfe);
	} else {
	ALOGE("EffectCreate() cannot create device effect on library with API version < 3.1");
	ret = -ENOSYS;
	}
	} else {
	ALOGI("EffectCreate() create_effect");
	ret = l->desc->create_effect(uuid, sessionId, ioId, &itfe);
	}

	if (ret != 0) {
	ALOGW("EffectCreate() library %s: could not create fx %s, error %d", l->name, d->name, ret);
	goto exit;
	}

	// add entry to effect list
	fx = (effect_entry_t *)malloc(sizeof(effect_entry_t));
	fx->subItfe = itfe;
	if ((*itfe)->process_reverse != NULL) {
	fx->itfe = (struct effect_interface_s *)&gInterfaceWithReverse;
	ALOGV("EffectCreate() gInterfaceWithReverse");
	} else {
	fx->itfe = (struct effect_interface_s *)&gInterface;
	ALOGV("EffectCreate() gInterface");
	}
	fx->lib = l;

	e = (list_elem_t *)malloc(sizeof(list_elem_t));
	e->object = fx;
	e->next = gEffectList;
	gEffectList = e;

	*pHandle = (effect_handle_t)fx;

	ALOGV("EffectCreate() created entry %p with sub itfe %p in library %s", *pHandle, itfe, l->name);

	exit:
	pthread_mutex_unlock(&gLibLock);
	return ret;
	}

	int EffectCreate(const effect_uuid_t *uuid, int32_t sessionId, int32_t ioId,
	effect_handle_t *pHandle) {
	return doEffectCreate(uuid, sessionId, ioId, AUDIO_PORT_HANDLE_NONE, pHandle);
	}

	int EffectCreateOnDevice(const effect_uuid_t *uuid, int32_t deviceId, int32_t ioId,
	effect_handle_t *pHandle) {
	return doEffectCreate(uuid, AUDIO_SESSION_DEVICE, ioId, deviceId, pHandle);
	}

	int EffectRelease(effect_handle_t handle)
	{
	effect_entry_t *fx;
	list_elem_t *e1;
	list_elem_t *e2;

	int ret = init();
	if (ret < 0) {
	return ret;
	}

	// remove effect from effect list
	pthread_mutex_lock(&gLibLock);
	e1 = gEffectList;
	e2 = NULL;
	while (e1) {
	if (e1->object == handle) {
	if (e2) {
	e2->next = e1->next;
	} else {
	gEffectList = e1->next;
	}
	fx = (effect_entry_t *)e1->object;
	free(e1);
	break;
	}
	e2 = e1;
	e1 = e1->next;
	}
	if (e1 == NULL) {
	ret = -ENOENT;
	goto exit;
	}

	// release effect in library
	if (fx->lib == NULL) {
	ALOGW("EffectRelease() fx %p library already unloaded", handle);
	} else {
	pthread_mutex_lock(&fx->lib->lock);
	fx->lib->desc->release_effect(fx->subItfe);
	pthread_mutex_unlock(&fx->lib->lock);
	}
	free(fx);

	exit:
	pthread_mutex_unlock(&gLibLock);
	return ret;
	}

	int EffectIsNullUuid(const effect_uuid_t *uuid)
	{
	if (memcmp(uuid, EFFECT_UUID_NULL, sizeof(effect_uuid_t))) {
	return 0;
	}
	return 1;
	}

	// Function to get the sub effect descriptors of the effect whose uuid
	// is pointed by the first argument. It searches the gSubEffectList for the
	// matching uuid and then copies the corresponding sub effect descriptors
	// to the inout param
	int EffectGetSubEffects(const effect_uuid_t uuid, sub_effect_entry_t *pSube,
	size_t size)
	{
	ALOGV("EffectGetSubEffects() UUID: %08X-%04X-%04X-%04X-%02X%02X%02X%02X%02X"
	"%02X\n",uuid->timeLow, uuid->timeMid, uuid->timeHiAndVersion,
	uuid->clockSeq, uuid->node[0], uuid->node[1],uuid->node[2],
	uuid->node[3],uuid->node[4],uuid->node[5]);

	// Check if the size of the desc buffer is large enough for 2 subeffects
	if ((uuid == NULL) \|\| (pSube == NULL) \|\| (size < 2)) {
	ALOGW("NULL pointer or insufficient memory. Cannot query subeffects");
	return -EINVAL;
	}
	int ret = init();
	if (ret < 0)
	return ret;
	list_sub_elem_t *e = gSubEffectList;
	sub_effect_entry_t *subeffect;
	effect_descriptor_t *d;
	int count = 0;
	while (e != NULL) {
	d = (effect_descriptor_t*)e->object;
	if (memcmp(uuid, &d->uuid, sizeof(effect_uuid_t)) == 0) {
	ALOGV("EffectGetSubEffects: effect found in the list");
	list_elem_t *subefx = e->sub_elem;
	while (subefx != NULL) {
	subeffect = (sub_effect_entry_t*)subefx->object;
	pSube[count++] = subeffect;
	subefx = subefx->next;
	}
	ALOGV("EffectGetSubEffects end - copied the sub effect structures");
	return count;
	}
	e = e->next;
	}
	return -ENOENT;
	}
	/////////////////////////////////////////////////
	// Local functions
	/////////////////////////////////////////////////

	int init() {
	if (gInitDone) {
	return 0;
	}

	// ignore effects or not?
	const bool ignoreFxConfFiles = property_get_bool(PROPERTY_IGNORE_EFFECTS, false);

	pthread_mutex_init(&gLibLock, NULL);

	if (ignoreFxConfFiles) {
	ALOGI("Audio effects in configuration files will be ignored");
	} else {
	gConfigNbElemSkipped = EffectLoadXmlEffectConfig(NULL);
	if (gConfigNbElemSkipped < 0) {
	ALOGW("Failed to load XML effect configuration, fallback to .conf");
	EffectLoadEffectConfig();
	} else if (gConfigNbElemSkipped > 0) {
	ALOGE("Effect config is partially invalid, skipped %zd elements", gConfigNbElemSkipped);
	}
	}

	updateNumEffects();
	gInitDone = 1;
	ALOGV("init() done");
	return 0;
	}

	// Searches the sub effect matching to the specified uuid
	// in the gSubEffectList. It gets the lib_entry_t for
	// the matched sub_effect . Used in EffectCreate of sub effects
	int findSubEffect(const effect_uuid_t *uuid,
	lib_entry_t **lib,
	effect_descriptor_t **desc)
	{
	list_sub_elem_t *e = gSubEffectList;
	list_elem_t *subefx;
	sub_effect_entry_t *effect;
	lib_entry_t *l = NULL;
	effect_descriptor_t *d = NULL;
	int found = 0;
	int ret = 0;

	if (uuid == NULL)
	return -EINVAL;

	while (e != NULL && !found) {
	subefx = (list_elem_t*)(e->sub_elem);
	while (subefx != NULL) {
	effect = (sub_effect_entry_t*)subefx->object;
	l = (lib_entry_t *)effect->lib;
	d = (effect_descriptor_t *)effect->object;
	if (memcmp(&d->uuid, uuid, sizeof(effect_uuid_t)) == 0) {
	ALOGV("uuid matched");
	found = 1;
	break;
	}
	subefx = subefx->next;
	}
	e = e->next;
	}
	if (!found) {
	ALOGV("findSubEffect() effect not found");
	ret = -ENOENT;
	} else {
	ALOGV("findSubEffect() found effect: %s in lib %s", d->name, l->name);
	*lib = l;
	if (desc != NULL) {
	*desc = d;
	}
	}
	return ret;
	}

	void resetEffectEnumeration()
	{
	gCurLib = gLibraryList;
	gCurEffect = NULL;
	if (gCurLib) {
	gCurEffect = ((lib_entry_t *)gCurLib->object)->effects;
	}
	gCurEffectIdx = 0;
	}

	uint32_t updateNumEffects() {
	list_elem_t *e;
	uint32_t cnt = 0;

	resetEffectEnumeration();

	e = gLibraryList;
	while (e) {
	lib_entry_t l = (lib_entry_t )e->object;
	list_elem_t *efx = l->effects;
	while (efx) {
	cnt++;
	efx = efx->next;
	}
	e = e->next;
	}
	gNumEffects = cnt;
	gCanQueryEffect = 0;
	return cnt;
	}

	int EffectDumpEffects(int fd) {
	char s[512];

	list_elem_t *fe = gLibraryFailedList;
	lib_failed_entry_t *fl = NULL;

	dprintf(fd, "Libraries NOT loaded:\n");

	while (fe) {
	fl = (lib_failed_entry_t *)fe->object;
	dprintf(fd, " Library %s\n", fl->name);
	dprintf(fd, " path: %s\n", fl->path);
	fe = fe->next;
	}

	list_elem_t *e = gLibraryList;
	lib_entry_t *l = NULL;
	effect_descriptor_t *d = NULL;
	int ret = 0;

	dprintf(fd, "Libraries loaded:\n");
	while (e) {
	l = (lib_entry_t *)e->object;
	list_elem_t *efx = l->effects;
	dprintf(fd, " Library %s\n", l->name);
	dprintf(fd, " path: %s\n", l->path);
	if (!efx) {
	dprintf(fd, " (no effects)\n");
	}
	while (efx) {
	d = (effect_descriptor_t *)efx->object;
	dumpEffectDescriptor(d, s, sizeof(s), 2);
	dprintf(fd, "%s", s);
	efx = efx->next;
	}
	e = e->next;
	}

	e = gSkippedEffects;
	if (e) {
	dprintf(fd, "Skipped effects\n");
	while(e) {
	d = (effect_descriptor_t *)e->object;
	dumpEffectDescriptor(d, s, sizeof(s), 2 /* indent */);
	dprintf(fd, "%s", s);
	e = e->next;
	}
	}
	switch (gConfigNbElemSkipped) {
	case -2:
	dprintf(fd, "Effect configuration loading skipped.\n");
	break;
	case -1:
	dprintf(fd, "XML effect configuration failed to load.\n");
	break;
	case 0:
	dprintf(fd, "XML effect configuration loaded successfully.\n");
	break;
	default:
	dprintf(fd, "XML effect configuration partially loaded, skipped %zd elements.\n",
	gConfigNbElemSkipped);
	}
	return ret;
	}