android_GenericMediaPlayer.h revision 85edd878a30caa535b0267d8d6e61b4ccc0d5fd0 
1/*
2 * Copyright (C) 2011 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_GENERICMEDIAPLAYER_H__
18#define __ANDROID_GENERICMEDIAPLAYER_H__
19
20#include "android_GenericPlayer.h"
21
22#include <binder/IServiceManager.h>
23#include <surfaceflinger/Surface.h>
24#include <gui/ISurfaceTexture.h>
25
26
27//--------------------------------------------------------------------------------------------------
28namespace android {
29
30class GenericMediaPlayer;
31class MediaPlayerNotificationClient : public BnMediaPlayerClient
32{
33public:
34    MediaPlayerNotificationClient(GenericMediaPlayer* gmp);
35    virtual ~MediaPlayerNotificationClient();
36
37    // IMediaPlayerClient implementation
38    virtual void notify(int msg, int ext1, int ext2, const Parcel *obj);
39
40    // Call before enqueuing a prepare event
41    void beforePrepare();
42
43    // Call after enqueueing the prepare event; returns true if the prepare
44    // completed successfully, or false if it completed unsuccessfully
45    bool blockUntilPlayerPrepared();
46
47private:
48    Mutex mLock;
49    GenericMediaPlayer* mGenericMediaPlayer;
50    Condition mPlayerPreparedCondition;
51    enum {
52        PREPARE_NOT_STARTED,
53        PREPARE_IN_PROGRESS,
54        PREPARE_COMPLETED_SUCCESSFULLY,
55        PREPARE_COMPLETED_UNSUCCESSFULLY
56    } mPlayerPrepared;
57};
58
59
60//--------------------------------------------------------------------------------------------------
61class GenericMediaPlayer : public GenericPlayer
62{
63public:
64
65    GenericMediaPlayer(const AudioPlayback_Parameters* params, bool hasVideo);
66    virtual ~GenericMediaPlayer();
67
68    virtual void preDestroy();
69
70    // overridden from GenericPlayer
71    virtual void getPositionMsec(int* msec); // ANDROID_UNKNOWN_TIME if unknown
72
73    virtual void setVideoSurface(const sp<Surface> &surface);
74    virtual void setVideoSurfaceTexture(const sp<ISurfaceTexture> &surfaceTexture);
75
76protected:
77    friend class MediaPlayerNotificationClient;
78
79    // Async event handlers (called from GenericPlayer's event loop)
80    virtual void onPrepare();
81    virtual void onPlay();
82    virtual void onPause();
83    virtual void onSeek(const sp<AMessage> &msg);
84    virtual void onLoop(const sp<AMessage> &msg);
85    virtual void onSeekComplete();
86    virtual void onVolumeUpdate();
87    virtual void onBufferingUpdate(const sp<AMessage> &msg);
88    virtual void onAttachAuxEffect(const sp<AMessage> &msg);
89    virtual void onSetAuxEffectSendLevel(const sp<AMessage> &msg);
90
91    bool mHasVideo;
92    int32_t mSeekTimeMsec;
93
94    sp<Surface> mVideoSurface;
95    sp<ISurfaceTexture> mVideoSurfaceTexture;
96
97    sp<IMediaPlayer> mPlayer;
98    // Receives Android MediaPlayer events from mPlayer
99    sp<MediaPlayerNotificationClient> mPlayerClient;
100
101    // Return a reference to the media player service, or LOGE and return NULL after retries fail
102    static const sp<IMediaPlayerService> getMediaPlayerService() {
103        return IMediaDeathNotifier::getMediaPlayerService();
104    }
105
106private:
107    DISALLOW_EVIL_CONSTRUCTORS(GenericMediaPlayer);
108    void afterMediaPlayerPreparedSuccessfully();
109
110    Mutex mPlayerPreparedLock;          // protects mPlayerPrepared
111    sp<IMediaPlayer> mPlayerPrepared;   // non-NULL if MediaPlayer exists and prepared, write once
112    void getPlayerPrepared(sp<IMediaPlayer> &playerPrepared);   // safely read mPlayerPrepared
113
114};
115
116} // namespace android
117
118#endif /* __ANDROID_GENERICMEDIAPLAYER_H__ */
119