MediaPlayerService.h revision 10dbb8e97e7a81ca4867663b5517f048820b3094 
1/*
2**
3** Copyright 2008, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#ifndef ANDROID_MEDIAPLAYERSERVICE_H
19#define ANDROID_MEDIAPLAYERSERVICE_H
20
21#include <utils/Log.h>
22#include <utils/threads.h>
23#include <utils/List.h>
24#include <utils/Errors.h>
25#include <utils/KeyedVector.h>
26#include <utils/Vector.h>
27#include <ui/SurfaceComposerClient.h>
28
29#include <media/IMediaPlayerService.h>
30#include <media/MediaPlayerInterface.h>
31#include <media/Metadata.h>
32
33namespace android {
34
35class IMediaRecorder;
36class IMediaMetadataRetriever;
37class IOMX;
38
39#define CALLBACK_ANTAGONIZER 0
40#if CALLBACK_ANTAGONIZER
41class Antagonizer {
42public:
43    Antagonizer(notify_callback_f cb, void* client);
44    void start() { mActive = true; }
45    void stop() { mActive = false; }
46    void kill();
47private:
48    static const int interval;
49    Antagonizer();
50    static int callbackThread(void* cookie);
51    Mutex               mLock;
52    Condition           mCondition;
53    bool                mExit;
54    bool                mActive;
55    void*               mClient;
56    notify_callback_f   mCb;
57};
58#endif
59
60class MediaPlayerService : public BnMediaPlayerService
61{
62    class Client;
63
64    class AudioOutput : public MediaPlayerBase::AudioSink
65    {
66    public:
67                                AudioOutput();
68        virtual                 ~AudioOutput();
69
70        virtual bool            ready() const { return mTrack != NULL; }
71        virtual bool            realtime() const { return true; }
72        virtual ssize_t         bufferSize() const;
73        virtual ssize_t         frameCount() const;
74        virtual ssize_t         channelCount() const;
75        virtual ssize_t         frameSize() const;
76        virtual uint32_t        latency() const;
77        virtual float           msecsPerFrame() const;
78
79        virtual status_t        open(
80                uint32_t sampleRate, int channelCount,
81                int format, int bufferCount,
82                AudioCallback cb, void *cookie);
83
84        virtual void            start();
85        virtual ssize_t         write(const void* buffer, size_t size);
86        virtual void            stop();
87        virtual void            flush();
88        virtual void            pause();
89        virtual void            close();
90                void            setAudioStreamType(int streamType) { mStreamType = streamType; }
91                void            setVolume(float left, float right);
92        virtual status_t        dump(int fd, const Vector<String16>& args) const;
93
94        static bool             isOnEmulator();
95        static int              getMinBufferCount();
96    private:
97        static void             setMinBufferCount();
98        static void             CallbackWrapper(
99                int event, void *me, void *info);
100
101        AudioTrack*             mTrack;
102        AudioCallback           mCallback;
103        void *                  mCallbackCookie;
104        int                     mStreamType;
105        float                   mLeftVolume;
106        float                   mRightVolume;
107        float                   mMsecsPerFrame;
108        uint32_t                mLatency;
109
110        // TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround
111        static const uint32_t   kAudioVideoDelayMs;
112        static bool             mIsOnEmulator;
113        static int              mMinBufferCount;  // 12 for emulator; otherwise 4
114
115        public: // visualization hack support
116        uint32_t                mNumFramesWritten;
117    };
118
119    class AudioCache : public MediaPlayerBase::AudioSink
120    {
121    public:
122                                AudioCache(const char* name);
123        virtual                 ~AudioCache() {}
124
125        virtual bool            ready() const { return (mChannelCount > 0) && (mHeap->getHeapID() > 0); }
126        virtual bool            realtime() const { return false; }
127        virtual ssize_t         bufferSize() const { return frameSize() * mFrameCount; }
128        virtual ssize_t         frameCount() const { return mFrameCount; }
129        virtual ssize_t         channelCount() const { return (ssize_t)mChannelCount; }
130        virtual ssize_t         frameSize() const { return ssize_t(mChannelCount * ((mFormat == AudioSystem::PCM_16_BIT)?sizeof(int16_t):sizeof(u_int8_t))); }
131        virtual uint32_t        latency() const;
132        virtual float           msecsPerFrame() const;
133
134        virtual status_t        open(
135                uint32_t sampleRate, int channelCount, int format,
136                int bufferCount = 1,
137                AudioCallback cb = NULL, void *cookie = NULL);
138
139        virtual void            start() {}
140        virtual ssize_t         write(const void* buffer, size_t size);
141        virtual void            stop() {}
142        virtual void            flush() {}
143        virtual void            pause() {}
144        virtual void            close() {}
145                void            setAudioStreamType(int streamType) {}
146                void            setVolume(float left, float right) {}
147                uint32_t        sampleRate() const { return mSampleRate; }
148                uint32_t        format() const { return (uint32_t)mFormat; }
149                size_t          size() const { return mSize; }
150                status_t        wait();
151
152                sp<IMemoryHeap> getHeap() const { return mHeap; }
153
154        static  void            notify(void* cookie, int msg, int ext1, int ext2);
155        virtual status_t        dump(int fd, const Vector<String16>& args) const;
156
157    private:
158                                AudioCache();
159
160        Mutex               mLock;
161        Condition           mSignal;
162        sp<MemoryHeapBase>  mHeap;
163        float               mMsecsPerFrame;
164        uint16_t            mChannelCount;
165        uint16_t            mFormat;
166        ssize_t             mFrameCount;
167        uint32_t            mSampleRate;
168        uint32_t            mSize;
169        int                 mError;
170        bool                mCommandComplete;
171    };
172
173public:
174    static  void                instantiate();
175
176    // IMediaPlayerService interface
177    virtual sp<IMediaRecorder>  createMediaRecorder(pid_t pid);
178    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid);
179
180    // House keeping for media player clients
181    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url);
182    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length);
183    virtual sp<IMemory>         decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
184    virtual sp<IMemory>         decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
185    virtual sp<IMemory>         snoop();
186    virtual sp<IOMX>            createOMX();
187
188    virtual status_t            dump(int fd, const Vector<String16>& args);
189
190            void                removeClient(wp<Client> client);
191
192
193private:
194
195    class Client : public BnMediaPlayer {
196
197        // IMediaPlayer interface
198        virtual void            disconnect();
199        virtual status_t        setVideoSurface(const sp<ISurface>& surface);
200        virtual status_t        prepareAsync();
201        virtual status_t        start();
202        virtual status_t        stop();
203        virtual status_t        pause();
204        virtual status_t        isPlaying(bool* state);
205        virtual status_t        seekTo(int msec);
206        virtual status_t        getCurrentPosition(int* msec);
207        virtual status_t        getDuration(int* msec);
208        virtual status_t        reset();
209        virtual status_t        setAudioStreamType(int type);
210        virtual status_t        setLooping(int loop);
211        virtual status_t        setVolume(float leftVolume, float rightVolume);
212        virtual status_t        invoke(const Parcel& request, Parcel *reply);
213        virtual status_t        setMetadataFilter(const Parcel& filter);
214        virtual status_t        getMetadata(bool update_only,
215                                            bool apply_filter,
216                                            Parcel *reply);
217
218        sp<MediaPlayerBase>     createPlayer(player_type playerType);
219                status_t        setDataSource(const char *url);
220                status_t        setDataSource(int fd, int64_t offset, int64_t length);
221        static  void            notify(void* cookie, int msg, int ext1, int ext2);
222
223                pid_t           pid() const { return mPid; }
224        virtual status_t        dump(int fd, const Vector<String16>& args) const;
225
226    private:
227        friend class MediaPlayerService;
228                                Client( const sp<MediaPlayerService>& service,
229                                        pid_t pid,
230                                        int32_t connId,
231                                        const sp<IMediaPlayerClient>& client);
232                                Client();
233        virtual                 ~Client();
234
235                void            deletePlayer();
236
237        sp<MediaPlayerBase>     getPlayer() const { Mutex::Autolock lock(mLock); return mPlayer; }
238
239
240
241        // @param type Of the metadata to be tested.
242        // @return true if the metadata should be dropped according to
243        //              the filters.
244        bool shouldDropMetadata(media::Metadata::Type type) const;
245
246        // Add a new element to the set of metadata updated. Noop if
247        // the element exists already.
248        // @param type Of the metadata to be recorded.
249        void addNewMetadataUpdate(media::Metadata::Type type);
250
251        mutable     Mutex                       mLock;
252                    sp<MediaPlayerBase>         mPlayer;
253                    sp<MediaPlayerService>      mService;
254                    sp<IMediaPlayerClient>      mClient;
255                    sp<AudioOutput>             mAudioOutput;
256                    pid_t                       mPid;
257                    status_t                    mStatus;
258                    bool                        mLoop;
259                    int32_t                     mConnId;
260
261        // Metadata filters.
262        media::Metadata::Filter mMetadataAllow;  // protected by mLock
263        media::Metadata::Filter mMetadataDrop;  // protected by mLock
264
265        // Metadata updated. For each MEDIA_INFO_METADATA_UPDATE
266        // notification we try to update mMetadataUpdated which is a
267        // set: no duplicate.
268        // getMetadata clears this set.
269        media::Metadata::Filter mMetadataUpdated;  // protected by mLock
270
271#if CALLBACK_ANTAGONIZER
272                    Antagonizer*                mAntagonizer;
273#endif
274    };
275
276// ----------------------------------------------------------------------------
277
278                            MediaPlayerService();
279    virtual                 ~MediaPlayerService();
280
281    mutable     Mutex                       mLock;
282                SortedVector< wp<Client> >  mClients;
283                int32_t                     mNextConnId;
284};
285
286// ----------------------------------------------------------------------------
287
288}; // namespace android
289
290#endif // ANDROID_MEDIAPLAYERSERVICE_H
291