AudioSession.h revision 599c758b258cc5da0dba9b530425381facc37d77 
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 <system/audio.h>
20#include <utils/Errors.h>
21#include <utils/RefBase.h>
22#include <utils/Errors.h>
23#include <utils/KeyedVector.h>
24
25namespace android {
26
27class AudioSession : public RefBase
28{
29public:
30    AudioSession(audio_session_t session,
31                 audio_source_t inputSource,
32                 audio_format_t format,
33                 uint32_t sampleRate,
34                 audio_channel_mask_t channelMask,
35                 audio_input_flags_t flags,
36                 uid_t uid,
37                 bool isSoundTrigger);
38
39    status_t dump(int fd, int spaces, int index) const;
40
41    audio_session_t session() const { return mSession; }
42    audio_source_t inputSource()const { return mInputSource; }
43    audio_format_t format() const { return mFormat; }
44    uint32_t sampleRate() const { return mSampleRate; }
45    audio_channel_mask_t channelMask() const { return mChannelMask; }
46    audio_input_flags_t flags() const { return mFlags; }
47    uid_t uid() const { return mUid; }
48    bool matches(const sp<AudioSession> &other) const;
49    bool isSoundTrigger() const { return mIsSoundTrigger; }
50    uint32_t openCount() const { return mOpenCount; } ;
51    uint32_t activeCount() const { return mActiveCount; } ;
52
53    uint32_t changeOpenCount(int delta);
54    uint32_t changeActiveCount(int delta);
55
56private:
57    const audio_session_t mSession;
58    const audio_source_t mInputSource;
59    const audio_format_t mFormat;
60    const uint32_t mSampleRate;
61    const audio_channel_mask_t mChannelMask;
62    const audio_input_flags_t mFlags;
63    const uid_t mUid;
64    bool  mIsSoundTrigger;
65    uint32_t  mOpenCount;
66    uint32_t  mActiveCount;
67};
68
69class AudioSessionCollection :
70    public DefaultKeyedVector<audio_session_t, sp<AudioSession> >
71{
72public:
73    status_t addSession(audio_session_t session,
74                             const sp<AudioSession>& audioSession);
75
76    status_t removeSession(audio_session_t session);
77
78    uint32_t getOpenCount() const;
79
80    AudioSessionCollection getActiveSessions() const;
81    bool hasActiveSession() const;
82    bool isSourceActive(audio_source_t source) const;
83
84    status_t dump(int fd, int spaces) const;
85};
86
87}; // namespace android
88