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_TRACK_PLAYER_BASE_H__
18 #define __ANDROID_TRACK_PLAYER_BASE_H__
19 
20 #include <media/AudioTrack.h>
21 #include <media/PlayerBase.h>
22 
23 namespace android {
24 
25 class TrackPlayerBase : public PlayerBase
26 {
27 public:
28     explicit TrackPlayerBase();
29     virtual ~TrackPlayerBase();
30 
31             void init(AudioTrack* pat, player_type_t playerType, audio_usage_t usage);
32     virtual void destroy();
33 
34     //IPlayer implementation
35     virtual binder::Status applyVolumeShaper(
36             const media::VolumeShaper::Configuration& configuration,
37             const media::VolumeShaper::Operation& operation);
38 
39     //FIXME move to protected field, so far made public to minimize changes to AudioTrack logic
40     sp<AudioTrack> mAudioTrack;
41 
42             void setPlayerVolume(float vl, float vr);
43 
44 protected:
45 
46     //PlayerBase virtuals
47     virtual status_t playerStart();
48     virtual status_t playerPause();
49     virtual status_t playerStop();
50     virtual status_t playerSetVolume();
51 
52 private:
53             void doDestroy();
54             status_t doSetVolume();
55 
56     // volume coming from the player volume API
57     float mPlayerVolumeL, mPlayerVolumeR;
58 };
59 
60 } // namespace android
61 
62 #endif /* __ANDROID_TRACK_PLAYER_BASE_H__ */
63