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 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: MediaPlayerDeathNotifier(const sp<MediaPlayerNotificationClient> playerClient)63 MediaPlayerDeathNotifier(const sp<MediaPlayerNotificationClient> playerClient) : 64 mPlayerClient(playerClient) { 65 } 66 died()67 void died() { 68 mPlayerClient->notify(MEDIA_ERROR, MEDIA_ERROR_SERVER_DIED, 0, NULL); 69 } 70 71 protected: ~MediaPlayerDeathNotifier()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 getMediaPlayerService()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