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 */
27static inline bool NO_AUTOGAIN(IAndroidAutomaticGainControl* v) {
28    return (v->mAGCEffect == 0);
29}
30
31SLresult 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
50SLresult 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        if (NO_AUTOGAIN(thiz)) {
61            result = SL_RESULT_CONTROL_LOST;
62        } else {
63            *pEnabled = (SLboolean) thiz->mAGCEffect->getEnabled();
64            result = SL_RESULT_SUCCESS;
65        }
66        interface_unlock_exclusive(thiz);
67    }
68    SL_LEAVE_INTERFACE
69}
70
71SLresult IAndroidAutomaticGainControl_IsAvailable(SLAndroidAutomaticGainControlItf self,
72                                                  SLboolean *pEnabled)
73{
74    SL_ENTER_INTERFACE
75
76   *pEnabled = false;
77
78    uint32_t numEffects = 0;
79    int ret = EffectQueryNumberEffects(&numEffects);
80    if (ret != 0) {
81        ALOGE("IAndroidAutomaticGainControl_IsAvailable() error %d querying number of effects",
82              ret);
83        result = SL_RESULT_FEATURE_UNSUPPORTED;
84   } else {
85        ALOGV("EffectQueryNumberEffects() numEffects=%d", numEffects);
86
87        effect_descriptor_t fxDesc;
88        for (uint32_t i = 0 ; i < numEffects ; i++) {
89            if (EffectQueryEffect(i, &fxDesc) == 0) {
90                ALOGV("effect %d is called %s", i, fxDesc.name);
91                if (memcmp(&fxDesc.type, SL_IID_ANDROIDAUTOMATICGAINCONTROL,
92                           sizeof(effect_uuid_t)) == 0) {
93                    ALOGI("found effect \"%s\" from %s", fxDesc.name, fxDesc.implementor);
94                    *pEnabled = true;
95                    break;
96                }
97            }
98        }
99        result = SL_RESULT_SUCCESS;
100    }
101    SL_LEAVE_INTERFACE
102}
103
104static const struct SLAndroidAutomaticGainControlItf_ IAndroidAutomaticGainControl_Itf = {
105    IAndroidAutomaticGainControl_SetEnabled,
106    IAndroidAutomaticGainControl_IsEnabled,
107    IAndroidAutomaticGainControl_IsAvailable
108};
109
110void IAndroidAutomaticGainControl_init(void *self)
111{
112    IAndroidAutomaticGainControl *thiz = (IAndroidAutomaticGainControl *) self;
113    thiz->mItf = &IAndroidAutomaticGainControl_Itf;
114    thiz->mEnabled = SL_BOOLEAN_FALSE;
115    memset(&thiz->mAGCDescriptor, 0, sizeof(effect_descriptor_t));
116    // placement new (explicit constructor)
117    (void) new (&thiz->mAGCEffect) android::sp<android::AudioEffect>();
118}
119
120void IAndroidAutomaticGainControl_deinit(void *self)
121{
122    IAndroidAutomaticGainControl *thiz = (IAndroidAutomaticGainControl *) self;
123    // explicit destructor
124    thiz->mAGCEffect.~sp();
125}
126
127bool IAndroidAutomaticGainControl_Expose(void *self)
128{
129    IAndroidAutomaticGainControl *thiz = (IAndroidAutomaticGainControl *) self;
130    if (!android_fx_initEffectDescriptor(SL_IID_ANDROIDAUTOMATICGAINCONTROL,
131                                         &thiz->mAGCDescriptor)) {
132        SL_LOGE("Automatic Gain Control initialization failed.");
133        return false;
134    }
135    return true;
136}
137