1 /*
2  * Copyright (C) 2017 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 #ifndef __ANDROID_PLAYER_BASE_H__
18 #define __ANDROID_PLAYER_BASE_H__
19 
20 #include <audiomanager/AudioManager.h>
21 #include <audiomanager/IAudioManager.h>
22 
23 #include "android/media/BnPlayer.h"
24 
25 namespace android {
26 
27 class PlayerBase : public ::android::media::BnPlayer
28 {
29 public:
30     explicit PlayerBase();
31     virtual ~PlayerBase() override;
32 
33     virtual void destroy() = 0;
34 
35     //IPlayer implementation
36     virtual binder::Status start() override;
37     virtual binder::Status pause() override;
38     virtual binder::Status stop() override;
39     virtual binder::Status setVolume(float vol) override;
40     virtual binder::Status setPan(float pan) override;
41     virtual binder::Status setStartDelayMs(int32_t delayMs) override;
42     virtual binder::Status applyVolumeShaper(
43             const media::VolumeShaper::Configuration& configuration,
44             const media::VolumeShaper::Operation& operation) override;
45 
46             status_t startWithStatus();
47             status_t pauseWithStatus();
48             status_t stopWithStatus();
49 
50             //FIXME temporary method while some player state is outside of this class
51             void reportEvent(player_state_t event);
52 
53 protected:
54 
55             void init(player_type_t playerType, audio_usage_t usage);
56             void baseDestroy();
57 
58     //IPlayer methods handlers for derived classes
playerStart()59     virtual status_t playerStart()  { return NO_ERROR; }
playerPause()60     virtual status_t playerPause()  { return NO_ERROR; }
playerStop()61     virtual status_t playerStop()  { return NO_ERROR; }
playerSetVolume()62     virtual status_t playerSetVolume()  { return NO_ERROR; }
63 
64     // mutex for IPlayer volume and pan, and player-specific volume
65     Mutex mSettingsLock;
66 
67     // volume multipliers coming from the IPlayer volume and pan controls
68     float mPanMultiplierL, mPanMultiplierR;
69     float mVolumeMultiplierL, mVolumeMultiplierR;
70 
71 private:
72             // report events to AudioService
73             void servicePlayerEvent(player_state_t event);
74             void serviceReleasePlayer();
75 
76     // native interface to AudioService
77     android::sp<android::IAudioManager> mAudioManager;
78 
79     // player interface ID, uniquely identifies the player in the system
80     audio_unique_id_t mPIId;
81 
82     // Mutex for state reporting
83     Mutex mPlayerStateLock;
84     player_state_t mLastReportedEvent;
85 };
86 
87 } // namespace android
88 
89 #endif /* __ANDROID_PLAYER_BASE_H__ */
90