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
18#ifndef ANDROID_AUDIO_POLICY_H
19#define ANDROID_AUDIO_POLICY_H
20
21#include <system/audio.h>
22#include <system/audio_policy.h>
23#include <binder/Parcel.h>
24#include <utils/String8.h>
25#include <utils/Vector.h>
26
27namespace android {
28
29// Keep in sync with AudioMix.java, AudioMixingRule.java, AudioPolicyConfig.java
30#define RULE_EXCLUSION_MASK 0x8000
31#define RULE_MATCH_ATTRIBUTE_USAGE           0x1
32#define RULE_MATCH_ATTRIBUTE_CAPTURE_PRESET (0x1 << 1)
33#define RULE_MATCH_UID                      (0x1 << 2)
34#define RULE_EXCLUDE_ATTRIBUTE_USAGE  (RULE_EXCLUSION_MASK|RULE_MATCH_ATTRIBUTE_USAGE)
35#define RULE_EXCLUDE_ATTRIBUTE_CAPTURE_PRESET \
36                                      (RULE_EXCLUSION_MASK|RULE_MATCH_ATTRIBUTE_CAPTURE_PRESET)
37#define RULE_EXCLUDE_UID              (RULE_EXCLUSION_MASK|RULE_MATCH_UID)
38
39#define MIX_TYPE_INVALID (-1)
40#define MIX_TYPE_PLAYERS 0
41#define MIX_TYPE_RECORDERS 1
42
43// definition of the different events that can be reported on a dynamic policy from
44//   AudioSystem's implementation of the AudioPolicyClient interface
45// keep in sync with AudioSystem.java
46#define DYNAMIC_POLICY_EVENT_MIX_STATE_UPDATE 0
47
48#define MIX_STATE_DISABLED (-1)
49#define MIX_STATE_IDLE 0
50#define MIX_STATE_MIXING 1
51
52#define MIX_ROUTE_FLAG_RENDER 0x1
53#define MIX_ROUTE_FLAG_LOOP_BACK (0x1 << 1)
54#define MIX_ROUTE_FLAG_ALL (MIX_ROUTE_FLAG_RENDER | MIX_ROUTE_FLAG_LOOP_BACK)
55
56#define MAX_MIXES_PER_POLICY 10
57#define MAX_CRITERIA_PER_MIX 20
58
59class AudioMixMatchCriterion {
60public:
61    AudioMixMatchCriterion() {}
62    AudioMixMatchCriterion(audio_usage_t usage, audio_source_t source, uint32_t rule);
63
64    status_t readFromParcel(Parcel *parcel);
65    status_t writeToParcel(Parcel *parcel) const;
66
67    union {
68        audio_usage_t   mUsage;
69        audio_source_t  mSource;
70        uid_t           mUid;
71    } mValue;
72    uint32_t        mRule;
73};
74
75class AudioMix {
76public:
77    // flag on an AudioMix indicating the activity on this mix (IDLE, MIXING)
78    //   must be reported through the AudioPolicyClient interface
79    static const uint32_t kCbFlagNotifyActivity = 0x1;
80
81    AudioMix() {}
82    AudioMix(Vector<AudioMixMatchCriterion> criteria, uint32_t mixType, audio_config_t format,
83             uint32_t routeFlags, String8 registrationId, uint32_t flags) :
84        mCriteria(criteria), mMixType(mixType), mFormat(format),
85        mRouteFlags(routeFlags), mDeviceAddress(registrationId), mCbFlags(flags){}
86
87    status_t readFromParcel(Parcel *parcel);
88    status_t writeToParcel(Parcel *parcel) const;
89
90    Vector<AudioMixMatchCriterion> mCriteria;
91    uint32_t        mMixType;
92    audio_config_t  mFormat;
93    uint32_t        mRouteFlags;
94    audio_devices_t mDeviceType;
95    String8         mDeviceAddress;
96    uint32_t        mCbFlags; // flags indicating which callbacks to use, see kCbFlag*
97};
98
99
100// definitions for audio recording configuration updates
101// which update type is reported
102#define RECORD_CONFIG_EVENT_NONE -1
103#define RECORD_CONFIG_EVENT_START 1
104#define RECORD_CONFIG_EVENT_STOP  0
105
106}; // namespace android
107
108#endif  // ANDROID_AUDIO_POLICY_H
109