1 /*
2  * Copyright (C) 2015 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 #pragma once
18 
19 #include <RoutingStrategy.h>
20 #include <hardware/audio_effect.h>
21 #include <utils/KeyedVector.h>
22 #include <utils/RefBase.h>
23 #include <utils/Errors.h>
24 
25 namespace android {
26 
27 
28 class EffectDescriptor : public RefBase
29 {
30 public:
31     status_t dump(int fd);
32 
33     int mIo;                // io the effect is attached to
34     routing_strategy mStrategy; // routing strategy the effect is associated to
35     int mSession;               // audio session the effect is on
36     effect_descriptor_t mDesc;  // effect descriptor
37     bool mEnabled;              // enabled state: CPU load being used or not
38 };
39 
40 class EffectDescriptorCollection : public KeyedVector<int, sp<EffectDescriptor> >
41 {
42 public:
43     EffectDescriptorCollection();
44 
45     status_t registerEffect(const effect_descriptor_t *desc, audio_io_handle_t io,
46                             uint32_t strategy, int session, int id);
47     status_t unregisterEffect(int id);
48     status_t setEffectEnabled(int id, bool enabled);
49     uint32_t getMaxEffectsCpuLoad() const;
50     uint32_t getMaxEffectsMemory() const;
51     bool isNonOffloadableEffectEnabled();
52 
53     status_t dump(int fd);
54 
55 private:
56     status_t setEffectEnabled(const sp<EffectDescriptor> &effectDesc, bool enabled);
57 
58     uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects
59     uint32_t mTotalEffectsMemory;  // current memory used by effects
60 
61     /**
62      * Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units
63      */
64     static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000;
65     /**
66      * Maximum memory allocated to audio effects in KB
67      */
68     static const uint32_t MAX_EFFECTS_MEMORY = 512;
69 };
70 
71 }; // namespace android
72