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 /* Acoustic Echo Cancellation implementation */
18 #include "sles_allinclusive.h"
19
20 #include <media/EffectsFactoryApi.h>
21
22 #include <audio_effects/effect_aec.h>
23
24 /**
25 * returns true if this interface is not associated with an initialized AEC effect
26 */
NO_ECHOCANCEL(IAndroidAcousticEchoCancellation * v)27 static inline bool NO_ECHOCANCEL(IAndroidAcousticEchoCancellation* v) {
28 return (v->mAECEffect == 0);
29 }
30
IAndroidAcousticEchoCancellation_SetEnabled(SLAndroidAcousticEchoCancellationItf self,SLboolean enabled)31 static SLresult IAndroidAcousticEchoCancellation_SetEnabled(SLAndroidAcousticEchoCancellationItf self,
32 SLboolean enabled)
33 {
34 SL_ENTER_INTERFACE
35
36 IAndroidAcousticEchoCancellation *thiz = (IAndroidAcousticEchoCancellation *) self;
37 interface_lock_exclusive(thiz);
38 thiz->mEnabled = (SLboolean) enabled;
39 if (NO_ECHOCANCEL(thiz)) {
40 result = SL_RESULT_CONTROL_LOST;
41 } else {
42 android::status_t status = thiz->mAECEffect->setEnabled((bool) thiz->mEnabled);
43 result = android_fx_statusToResult(status);
44 }
45 interface_unlock_exclusive(thiz);
46
47 SL_LEAVE_INTERFACE
48 }
49
IAndroidAcousticEchoCancellation_IsEnabled(SLAndroidAcousticEchoCancellationItf self,SLboolean * pEnabled)50 static SLresult IAndroidAcousticEchoCancellation_IsEnabled(SLAndroidAcousticEchoCancellationItf self,
51 SLboolean *pEnabled)
52 {
53 SL_ENTER_INTERFACE
54
55 if (NULL == pEnabled) {
56 result = SL_RESULT_PARAMETER_INVALID;
57 } else {
58 IAndroidAcousticEchoCancellation *thiz = (IAndroidAcousticEchoCancellation *) self;
59 interface_lock_exclusive(thiz);
60 SLboolean enabled = thiz->mEnabled;
61 if (NO_ECHOCANCEL(thiz)) {
62 result = SL_RESULT_CONTROL_LOST;
63 } else {
64 *pEnabled = (SLboolean) thiz->mAECEffect->getEnabled();
65 result = SL_RESULT_SUCCESS;
66 }
67 interface_unlock_exclusive(thiz);
68 }
69
70 SL_LEAVE_INTERFACE
71 }
72
IAndroidAcousticEchoCancellation_IsAvailable(SLAndroidAcousticEchoCancellationItf self,SLboolean * pEnabled)73 SLresult IAndroidAcousticEchoCancellation_IsAvailable(SLAndroidAcousticEchoCancellationItf self,
74 SLboolean *pEnabled)
75 {
76 SL_ENTER_INTERFACE
77
78 *pEnabled = false;
79
80 uint32_t numEffects = 0;
81 int ret = EffectQueryNumberEffects(&numEffects);
82 if (ret != 0) {
83 ALOGE("IAndroidAcousticEchoCancellation_IsAvailable() error %d querying number of effects",
84 ret);
85 result = SL_RESULT_FEATURE_UNSUPPORTED;
86 } else {
87 ALOGV("EffectQueryNumberEffects() numEffects=%d", numEffects);
88
89 effect_descriptor_t fxDesc;
90 for (uint32_t i = 0 ; i < numEffects ; i++) {
91 if (EffectQueryEffect(i, &fxDesc) == 0) {
92 ALOGV("effect %d is called %s", i, fxDesc.name);
93 if (memcmp(&fxDesc.type, SL_IID_ANDROIDACOUSTICECHOCANCELLATION,
94 sizeof(effect_uuid_t)) == 0) {
95 ALOGI("found effect \"%s\" from %s", fxDesc.name, fxDesc.implementor);
96 *pEnabled = true;
97 break;
98 }
99 }
100 }
101 result = SL_RESULT_SUCCESS;
102 }
103 SL_LEAVE_INTERFACE
104 }
105
106 static const struct SLAndroidAcousticEchoCancellationItf_ IAndroidAcousticEchoCancellation_Itf = {
107 IAndroidAcousticEchoCancellation_SetEnabled,
108 IAndroidAcousticEchoCancellation_IsEnabled,
109 IAndroidAcousticEchoCancellation_IsAvailable
110 };
111
IAndroidAcousticEchoCancellation_init(void * self)112 void IAndroidAcousticEchoCancellation_init(void *self)
113 {
114 IAndroidAcousticEchoCancellation *thiz = (IAndroidAcousticEchoCancellation *) self;
115 thiz->mItf = &IAndroidAcousticEchoCancellation_Itf;
116 thiz->mEnabled = SL_BOOLEAN_FALSE;
117 memset(&thiz->mAECDescriptor, 0, sizeof(effect_descriptor_t));
118 // placement new (explicit constructor)
119 (void) new (&thiz->mAECEffect) android::sp<android::AudioEffect>();
120 }
121
IAndroidAcousticEchoCancellation_deinit(void * self)122 void IAndroidAcousticEchoCancellation_deinit(void *self)
123 {
124 IAndroidAcousticEchoCancellation *thiz = (IAndroidAcousticEchoCancellation *) self;
125 // explicit destructor
126 thiz->mAECEffect.~sp();
127 }
128
IAndroidAcousticEchoCancellation_Expose(void * self)129 bool IAndroidAcousticEchoCancellation_Expose(void *self)
130 {
131 IAndroidAcousticEchoCancellation *thiz = (IAndroidAcousticEchoCancellation *) self;
132 if (!android_fx_initEffectDescriptor(SL_IID_ANDROIDACOUSTICECHOCANCELLATION,
133 &thiz->mAECDescriptor)) {
134 SL_LOGE("Acoustic Echo Cancellation initialization failed.");
135 return false;
136 }
137 return true;
138 }
139