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      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 <gui/IGraphicBufferProducer.h>
     24 
     25 
     26 //--------------------------------------------------------------------------------------------------
     27 namespace android {
     28 
     29 class GenericMediaPlayer;
     30 class MediaPlayerNotificationClient : public BnMediaPlayerClient
     31 {
     32 public:
     33     explicit MediaPlayerNotificationClient(GenericMediaPlayer* gmp);
     34 
     35     // IMediaPlayerClient implementation
     36     virtual void notify(int msg, int ext1, int ext2, const Parcel *obj);
     37 
     38     // Call before enqueuing a prepare event
     39     void beforePrepare();
     40 
     41     // Call after enqueueing the prepare event; returns true if the prepare
     42     // completed successfully, or false if it completed unsuccessfully
     43     bool blockUntilPlayerPrepared();
     44 
     45 protected:
     46     virtual ~MediaPlayerNotificationClient();
     47 
     48 private:
     49     const wp<GenericMediaPlayer> mGenericMediaPlayer;
     50     Mutex mLock;                        // protects mPlayerPrepared
     51     Condition mPlayerPreparedCondition; // signalled when mPlayerPrepared is changed
     52     enum {
     53         PREPARE_NOT_STARTED,
     54         PREPARE_IN_PROGRESS,
     55         PREPARE_COMPLETED_SUCCESSFULLY,
     56         PREPARE_COMPLETED_UNSUCCESSFULLY
     57     } mPlayerPrepared;
     58 };
     59 
     60 
     61 class MediaPlayerDeathNotifier : public IMediaDeathNotifier {
     62 public:
     63     explicit MediaPlayerDeathNotifier(const sp<MediaPlayerNotificationClient>& playerClient) :
     64         mPlayerClient(playerClient) {
     65     }
     66 
     67     void died() {
     68         mPlayerClient->notify(MEDIA_ERROR, MEDIA_ERROR_SERVER_DIED, 0, NULL);
     69     }
     70 
     71 protected:
     72     virtual ~MediaPlayerDeathNotifier() { }
     73 
     74 private:
     75     const sp<MediaPlayerNotificationClient> mPlayerClient;
     76 };
     77 
     78 
     79 //--------------------------------------------------------------------------------------------------
     80 class GenericMediaPlayer : public GenericPlayer
     81 {
     82 public:
     83 
     84     GenericMediaPlayer(const AudioPlayback_Parameters* params, bool hasVideo);
     85     virtual ~GenericMediaPlayer();
     86 
     87     virtual void preDestroy();
     88 
     89     // overridden from GenericPlayer
     90     virtual void getPositionMsec(int* msec); // ANDROID_UNKNOWN_TIME if unknown
     91 
     92     virtual void setVideoSurfaceTexture(const sp<IGraphicBufferProducer> &bufferProducer);
     93 
     94     virtual void setPlaybackRate(int32_t ratePermille);
     95 
     96 protected:
     97     friend class MediaPlayerNotificationClient;
     98 
     99     // Async event handlers (called from GenericPlayer's event loop)
    100     virtual void onPrepare();
    101     virtual void onPlay();
    102     virtual void onPause();
    103     virtual void onSeek(const sp<AMessage> &msg);
    104     virtual void onLoop(const sp<AMessage> &msg);
    105     virtual void onSeekComplete();
    106     virtual void onVolumeUpdate();
    107     virtual void onBufferingUpdate(const sp<AMessage> &msg);
    108     virtual void onAttachAuxEffect(const sp<AMessage> &msg);
    109     virtual void onSetAuxEffectSendLevel(const sp<AMessage> &msg);
    110 
    111     const bool mHasVideo;   // const allows MediaPlayerNotificationClient::notify to safely access
    112     int32_t mSeekTimeMsec;
    113 
    114     sp<IGraphicBufferProducer> mVideoSurfaceTexture;
    115 
    116     // only safe to access from within Realize and looper
    117     sp<IMediaPlayer> mPlayer;
    118     // Receives Android MediaPlayer events from mPlayer
    119     const sp<MediaPlayerNotificationClient> mPlayerClient;
    120 
    121     // Receives notifications about death of media.player service
    122     const sp<MediaPlayerDeathNotifier> mPlayerDeathNotifier;
    123 
    124     // Return a reference to the media player service, or ALOGE and return NULL after retries fail
    125     static const sp<IMediaPlayerService> getMediaPlayerService() {
    126         return IMediaDeathNotifier::getMediaPlayerService();
    127     }
    128 
    129 private:
    130     DISALLOW_EVIL_CONSTRUCTORS(GenericMediaPlayer);
    131     void afterMediaPlayerPreparedSuccessfully();
    132 
    133 protected:  // FIXME temporary
    134     Mutex mPreparedPlayerLock;          // protects mPreparedPlayer
    135     sp<IMediaPlayer> mPreparedPlayer;   // non-NULL if MediaPlayer exists and prepared, write once
    136 private:
    137     void getPreparedPlayer(sp<IMediaPlayer> &preparedPlayer);   // safely read mPreparedPlayer
    138 
    139 };
    140 
    141 } // namespace android
    142 
    143 // is the specified URI a known distant protocol?
    144 bool isDistantProtocol(const char *uri);
    145 
    146 #endif /* __ANDROID_GENERICMEDIAPLAYER_H__ */
    147