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(
32 SLAndroidAcousticEchoCancellationItf self,
33 SLboolean enabled)
34 {
35 SL_ENTER_INTERFACE
36
37 IAndroidAcousticEchoCancellation *thiz = (IAndroidAcousticEchoCancellation *) self;
38 interface_lock_exclusive(thiz);
39 thiz->mEnabled = (SLboolean) enabled;
40 if (NO_ECHOCANCEL(thiz)) {
41 result = SL_RESULT_CONTROL_LOST;
42 } else {
43 android::status_t status = thiz->mAECEffect->setEnabled((bool) thiz->mEnabled);
44 result = android_fx_statusToResult(status);
45 }
46 interface_unlock_exclusive(thiz);
47
48 SL_LEAVE_INTERFACE
49 }
50
IAndroidAcousticEchoCancellation_IsEnabled(SLAndroidAcousticEchoCancellationItf self,SLboolean * pEnabled)51 static SLresult IAndroidAcousticEchoCancellation_IsEnabled(
52 SLAndroidAcousticEchoCancellationItf self,
53 SLboolean *pEnabled)
54 {
55 SL_ENTER_INTERFACE
56
57 if (NULL == pEnabled) {
58 result = SL_RESULT_PARAMETER_INVALID;
59 } else {
60 IAndroidAcousticEchoCancellation *thiz = (IAndroidAcousticEchoCancellation *) self;
61 interface_lock_exclusive(thiz);
62 if (NO_ECHOCANCEL(thiz)) {
63 result = SL_RESULT_CONTROL_LOST;
64 } else {
65 *pEnabled = (SLboolean) thiz->mAECEffect->getEnabled();
66 result = SL_RESULT_SUCCESS;
67 }
68 interface_unlock_exclusive(thiz);
69 }
70
71 SL_LEAVE_INTERFACE
72 }
73
IAndroidAcousticEchoCancellation_IsAvailable(SLAndroidAcousticEchoCancellationItf self,SLboolean * pEnabled)74 SLresult IAndroidAcousticEchoCancellation_IsAvailable(SLAndroidAcousticEchoCancellationItf self,
75 SLboolean *pEnabled)
76 {
77 SL_ENTER_INTERFACE
78
79 *pEnabled = false;
80
81 uint32_t numEffects = 0;
82 int ret = EffectQueryNumberEffects(&numEffects);
83 if (ret != 0) {
84 ALOGE("IAndroidAcousticEchoCancellation_IsAvailable() error %d querying number of effects",
85 ret);
86 result = SL_RESULT_FEATURE_UNSUPPORTED;
87 } else {
88 ALOGV("EffectQueryNumberEffects() numEffects=%d", numEffects);
89
90 effect_descriptor_t fxDesc;
91 for (uint32_t i = 0 ; i < numEffects ; i++) {
92 if (EffectQueryEffect(i, &fxDesc) == 0) {
93 ALOGV("effect %d is called %s", i, fxDesc.name);
94 if (memcmp(&fxDesc.type, SL_IID_ANDROIDACOUSTICECHOCANCELLATION,
95 sizeof(effect_uuid_t)) == 0) {
96 ALOGI("found effect \"%s\" from %s", fxDesc.name, fxDesc.implementor);
97 *pEnabled = true;
98 break;
99 }
100 }
101 }
102 result = SL_RESULT_SUCCESS;
103 }
104 SL_LEAVE_INTERFACE
105 }
106
107 static const struct SLAndroidAcousticEchoCancellationItf_ IAndroidAcousticEchoCancellation_Itf = {
108 IAndroidAcousticEchoCancellation_SetEnabled,
109 IAndroidAcousticEchoCancellation_IsEnabled,
110 IAndroidAcousticEchoCancellation_IsAvailable
111 };
112
IAndroidAcousticEchoCancellation_init(void * self)113 void IAndroidAcousticEchoCancellation_init(void *self)
114 {
115 IAndroidAcousticEchoCancellation *thiz = (IAndroidAcousticEchoCancellation *) self;
116 thiz->mItf = &IAndroidAcousticEchoCancellation_Itf;
117 thiz->mEnabled = SL_BOOLEAN_FALSE;
118 memset(&thiz->mAECDescriptor, 0, sizeof(effect_descriptor_t));
119 // placement new (explicit constructor)
120 (void) new (&thiz->mAECEffect) android::sp<android::AudioEffect>();
121 }
122
IAndroidAcousticEchoCancellation_deinit(void * self)123 void IAndroidAcousticEchoCancellation_deinit(void *self)
124 {
125 IAndroidAcousticEchoCancellation *thiz = (IAndroidAcousticEchoCancellation *) self;
126 // explicit destructor
127 thiz->mAECEffect.~sp();
128 }
129
IAndroidAcousticEchoCancellation_Expose(void * self)130 bool IAndroidAcousticEchoCancellation_Expose(void *self)
131 {
132 IAndroidAcousticEchoCancellation *thiz = (IAndroidAcousticEchoCancellation *) self;
133 if (!android_fx_initEffectDescriptor(SL_IID_ANDROIDACOUSTICECHOCANCELLATION,
134 &thiz->mAECDescriptor)) {
135 SL_LOGE("Acoustic Echo Cancellation initialization failed.");
136 return false;
137 }
138 return true;
139 }
140