android_GenericMediaPlayer.h revision 241b9c06493479dc632a8851097c193b724a2b41 
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    const wp<GenericMediaPlayer> mGenericMediaPlayer;
49    Mutex mLock;                        // protects mPlayerPrepared
50    Condition mPlayerPreparedCondition; // signalled when mPlayerPrepared is changed
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 setVideoSurfaceTexture(const sp<ISurfaceTexture> &surfaceTexture);
74
75protected:
76    friend class MediaPlayerNotificationClient;
77
78    // Async event handlers (called from GenericPlayer's event loop)
79    virtual void onPrepare();
80    virtual void onPlay();
81    virtual void onPause();
82    virtual void onSeek(const sp<AMessage> &msg);
83    virtual void onLoop(const sp<AMessage> &msg);
84    virtual void onSeekComplete();
85    virtual void onVolumeUpdate();
86    virtual void onBufferingUpdate(const sp<AMessage> &msg);
87    virtual void onAttachAuxEffect(const sp<AMessage> &msg);
88    virtual void onSetAuxEffectSendLevel(const sp<AMessage> &msg);
89
90    const bool mHasVideo;   // const allows MediaPlayerNotificationClient::notify to safely access
91    int32_t mSeekTimeMsec;
92
93    sp<ISurfaceTexture> mVideoSurfaceTexture;
94
95    // only safe to access from within Realize and looper
96    sp<IMediaPlayer> mPlayer;
97    // Receives Android MediaPlayer events from mPlayer
98    const sp<MediaPlayerNotificationClient> mPlayerClient;
99
100    // Return a reference to the media player service, or LOGE and return NULL after retries fail
101    static const sp<IMediaPlayerService> getMediaPlayerService() {
102        return IMediaDeathNotifier::getMediaPlayerService();
103    }
104
105private:
106    DISALLOW_EVIL_CONSTRUCTORS(GenericMediaPlayer);
107    void afterMediaPlayerPreparedSuccessfully();
108
109protected:  // FIXME temporary
110    Mutex mPreparedPlayerLock;          // protects mPreparedPlayer
111    sp<IMediaPlayer> mPreparedPlayer;   // non-NULL if MediaPlayer exists and prepared, write once
112private:
113    void getPreparedPlayer(sp<IMediaPlayer> &preparedPlayer);   // safely read mPreparedPlayer
114
115};
116
117} // namespace android
118
119// is the specified URI a known distant protocol?
120bool isDistantProtocol(const char *uri);
121
122#endif /* __ANDROID_GENERICMEDIAPLAYER_H__ */
123