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      1 /*
      2  * Copyright (C) 2014 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 /* Automatic Gain Control implementation */
     18 #include "sles_allinclusive.h"
     19 
     20 #include <media/EffectsFactoryApi.h>
     21 
     22 #include <audio_effects/effect_agc.h>
     23 
     24 /**
     25  * returns true if this interface is not associated with an initialized AGC effect
     26  */
     27 static inline bool NO_AUTOGAIN(IAndroidAutomaticGainControl* v) {
     28     return (v->mAGCEffect == 0);
     29 }
     30 
     31 SLresult IAndroidAutomaticGainControl_SetEnabled(SLAndroidAutomaticGainControlItf self,
     32                                                  SLboolean enabled)
     33 {
     34     SL_ENTER_INTERFACE
     35 
     36     IAndroidAutomaticGainControl *thiz = (IAndroidAutomaticGainControl *) self;
     37     interface_lock_exclusive(thiz);
     38     thiz->mEnabled = (SLboolean) enabled;
     39     if (NO_AUTOGAIN(thiz)) {
     40         result = SL_RESULT_CONTROL_LOST;
     41     } else {
     42         android::status_t status = thiz->mAGCEffect->setEnabled((bool) thiz->mEnabled);
     43         result = android_fx_statusToResult(status);
     44     }
     45     interface_unlock_exclusive(thiz);
     46 
     47     SL_LEAVE_INTERFACE
     48 }
     49 
     50 SLresult IAndroidAutomaticGainControl_IsEnabled(SLAndroidAutomaticGainControlItf self,
     51                                                 SLboolean *pEnabled)
     52 {
     53     SL_ENTER_INTERFACE
     54 
     55     if (NULL == pEnabled) {
     56         result = SL_RESULT_PARAMETER_INVALID;
     57     } else {
     58         IAndroidAutomaticGainControl *thiz = (IAndroidAutomaticGainControl *) self;
     59         interface_lock_exclusive(thiz);
     60         SLboolean enabled = thiz->mEnabled;
     61         if (NO_AUTOGAIN(thiz)) {
     62             result = SL_RESULT_CONTROL_LOST;
     63         } else {
     64             *pEnabled = (SLboolean) thiz->mAGCEffect->getEnabled();
     65             result = SL_RESULT_SUCCESS;
     66         }
     67         interface_unlock_exclusive(thiz);
     68     }
     69     SL_LEAVE_INTERFACE
     70 }
     71 
     72 SLresult IAndroidAutomaticGainControl_IsAvailable(SLAndroidAutomaticGainControlItf self,
     73                                                   SLboolean *pEnabled)
     74 {
     75     SL_ENTER_INTERFACE
     76 
     77    *pEnabled = false;
     78 
     79     uint32_t numEffects = 0;
     80     int ret = EffectQueryNumberEffects(&numEffects);
     81     if (ret != 0) {
     82         ALOGE("IAndroidAutomaticGainControl_IsAvailable() error %d querying number of effects",
     83               ret);
     84         result = SL_RESULT_FEATURE_UNSUPPORTED;
     85    } else {
     86         ALOGV("EffectQueryNumberEffects() numEffects=%d", numEffects);
     87 
     88         effect_descriptor_t fxDesc;
     89         for (uint32_t i = 0 ; i < numEffects ; i++) {
     90             if (EffectQueryEffect(i, &fxDesc) == 0) {
     91                 ALOGV("effect %d is called %s", i, fxDesc.name);
     92                 if (memcmp(&fxDesc.type, SL_IID_ANDROIDAUTOMATICGAINCONTROL,
     93                            sizeof(effect_uuid_t)) == 0) {
     94                     ALOGI("found effect \"%s\" from %s", fxDesc.name, fxDesc.implementor);
     95                     *pEnabled = true;
     96                     break;
     97                 }
     98             }
     99         }
    100         result = SL_RESULT_SUCCESS;
    101     }
    102     SL_LEAVE_INTERFACE
    103 }
    104 
    105 static const struct SLAndroidAutomaticGainControlItf_ IAndroidAutomaticGainControl_Itf = {
    106     IAndroidAutomaticGainControl_SetEnabled,
    107     IAndroidAutomaticGainControl_IsEnabled,
    108     IAndroidAutomaticGainControl_IsAvailable
    109 };
    110 
    111 void IAndroidAutomaticGainControl_init(void *self)
    112 {
    113     IAndroidAutomaticGainControl *thiz = (IAndroidAutomaticGainControl *) self;
    114     thiz->mItf = &IAndroidAutomaticGainControl_Itf;
    115     thiz->mEnabled = SL_BOOLEAN_FALSE;
    116     memset(&thiz->mAGCDescriptor, 0, sizeof(effect_descriptor_t));
    117     // placement new (explicit constructor)
    118     (void) new (&thiz->mAGCEffect) android::sp<android::AudioEffect>();
    119 }
    120 
    121 void IAndroidAutomaticGainControl_deinit(void *self)
    122 {
    123     IAndroidAutomaticGainControl *thiz = (IAndroidAutomaticGainControl *) self;
    124     // explicit destructor
    125     thiz->mAGCEffect.~sp();
    126 }
    127 
    128 bool IAndroidAutomaticGainControl_Expose(void *self)
    129 {
    130     IAndroidAutomaticGainControl *thiz = (IAndroidAutomaticGainControl *) self;
    131     if (!android_fx_initEffectDescriptor(SL_IID_ANDROIDAUTOMATICGAINCONTROL,
    132                                          &thiz->mAGCDescriptor)) {
    133         SL_LOGE("Automatic Gain Control initialization failed.");
    134         return false;
    135     }
    136     return true;
    137 }
    138