MediaPlayerService.h revision 1d711f67ffb3ea73aca155537e0f21b444251158 
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;
38class MediaRecorderClient;
39
40#define CALLBACK_ANTAGONIZER 0
41#if CALLBACK_ANTAGONIZER
42class Antagonizer {
43public:
44    Antagonizer(notify_callback_f cb, void* client);
45    void start() { mActive = true; }
46    void stop() { mActive = false; }
47    void kill();
48private:
49    static const int interval;
50    Antagonizer();
51    static int callbackThread(void* cookie);
52    Mutex               mLock;
53    Condition           mCondition;
54    bool                mExit;
55    bool                mActive;
56    void*               mClient;
57    notify_callback_f   mCb;
58};
59#endif
60
61class MediaPlayerService : public BnMediaPlayerService
62{
63    class Client;
64
65    class AudioOutput : public MediaPlayerBase::AudioSink
66    {
67    public:
68                                AudioOutput();
69        virtual                 ~AudioOutput();
70
71        virtual bool            ready() const { return mTrack != NULL; }
72        virtual bool            realtime() const { return true; }
73        virtual ssize_t         bufferSize() const;
74        virtual ssize_t         frameCount() const;
75        virtual ssize_t         channelCount() const;
76        virtual ssize_t         frameSize() const;
77        virtual uint32_t        latency() const;
78        virtual float           msecsPerFrame() const;
79
80        virtual status_t        open(
81                uint32_t sampleRate, int channelCount,
82                int format, int bufferCount,
83                AudioCallback cb, void *cookie);
84
85        virtual void            start();
86        virtual ssize_t         write(const void* buffer, size_t size);
87        virtual void            stop();
88        virtual void            flush();
89        virtual void            pause();
90        virtual void            close();
91                void            setAudioStreamType(int streamType) { mStreamType = streamType; }
92                void            setVolume(float left, float right);
93        virtual status_t        dump(int fd, const Vector<String16>& args) const;
94
95        static bool             isOnEmulator();
96        static int              getMinBufferCount();
97    private:
98        static void             setMinBufferCount();
99        static void             CallbackWrapper(
100                int event, void *me, void *info);
101
102        AudioTrack*             mTrack;
103        AudioCallback           mCallback;
104        void *                  mCallbackCookie;
105        int                     mStreamType;
106        float                   mLeftVolume;
107        float                   mRightVolume;
108        float                   mMsecsPerFrame;
109        uint32_t                mLatency;
110
111        static bool             mIsOnEmulator;
112        static int              mMinBufferCount;  // 12 for emulator; otherwise 4
113
114        public: // visualization hack support
115        uint32_t                mNumFramesWritten;
116    };
117
118    class AudioCache : public MediaPlayerBase::AudioSink
119    {
120    public:
121                                AudioCache(const char* name);
122        virtual                 ~AudioCache() {}
123
124        virtual bool            ready() const { return (mChannelCount > 0) && (mHeap->getHeapID() > 0); }
125        virtual bool            realtime() const { return false; }
126        virtual ssize_t         bufferSize() const { return frameSize() * mFrameCount; }
127        virtual ssize_t         frameCount() const { return mFrameCount; }
128        virtual ssize_t         channelCount() const { return (ssize_t)mChannelCount; }
129        virtual ssize_t         frameSize() const { return ssize_t(mChannelCount * ((mFormat == AudioSystem::PCM_16_BIT)?sizeof(int16_t):sizeof(u_int8_t))); }
130        virtual uint32_t        latency() const;
131        virtual float           msecsPerFrame() const;
132
133        virtual status_t        open(
134                uint32_t sampleRate, int channelCount, int format,
135                int bufferCount = 1,
136                AudioCallback cb = NULL, void *cookie = NULL);
137
138        virtual void            start() {}
139        virtual ssize_t         write(const void* buffer, size_t size);
140        virtual void            stop() {}
141        virtual void            flush() {}
142        virtual void            pause() {}
143        virtual void            close() {}
144                void            setAudioStreamType(int streamType) {}
145                void            setVolume(float left, float right) {}
146                uint32_t        sampleRate() const { return mSampleRate; }
147                uint32_t        format() const { return (uint32_t)mFormat; }
148                size_t          size() const { return mSize; }
149                status_t        wait();
150
151                sp<IMemoryHeap> getHeap() const { return mHeap; }
152
153        static  void            notify(void* cookie, int msg, int ext1, int ext2);
154        virtual status_t        dump(int fd, const Vector<String16>& args) const;
155
156    private:
157                                AudioCache();
158
159        Mutex               mLock;
160        Condition           mSignal;
161        sp<MemoryHeapBase>  mHeap;
162        float               mMsecsPerFrame;
163        uint16_t            mChannelCount;
164        uint16_t            mFormat;
165        ssize_t             mFrameCount;
166        uint32_t            mSampleRate;
167        uint32_t            mSize;
168        int                 mError;
169        bool                mCommandComplete;
170    };
171
172public:
173    static  void                instantiate();
174
175    // IMediaPlayerService interface
176    virtual sp<IMediaRecorder>  createMediaRecorder(pid_t pid);
177    void    removeMediaRecorderClient(wp<MediaRecorderClient> client);
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>            getOMX();
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                SortedVector< wp<MediaRecorderClient> > mMediaRecorderClients;
284                int32_t                     mNextConnId;
285                sp<IOMX>                    mOMX;
286};
287
288// ----------------------------------------------------------------------------
289
290}; // namespace android
291
292#endif // ANDROID_MEDIAPLAYERSERVICE_H
293