MediaPlayerService.h revision 5b65c7043dada0c89d3a941742666ac40ea35746 
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        // TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround
112        static const uint32_t   kAudioVideoDelayMs;
113        static bool             mIsOnEmulator;
114        static int              mMinBufferCount;  // 12 for emulator; otherwise 4
115
116        public: // visualization hack support
117        uint32_t                mNumFramesWritten;
118    };
119
120    class AudioCache : public MediaPlayerBase::AudioSink
121    {
122    public:
123                                AudioCache(const char* name);
124        virtual                 ~AudioCache() {}
125
126        virtual bool            ready() const { return (mChannelCount > 0) && (mHeap->getHeapID() > 0); }
127        virtual bool            realtime() const { return false; }
128        virtual ssize_t         bufferSize() const { return frameSize() * mFrameCount; }
129        virtual ssize_t         frameCount() const { return mFrameCount; }
130        virtual ssize_t         channelCount() const { return (ssize_t)mChannelCount; }
131        virtual ssize_t         frameSize() const { return ssize_t(mChannelCount * ((mFormat == AudioSystem::PCM_16_BIT)?sizeof(int16_t):sizeof(u_int8_t))); }
132        virtual uint32_t        latency() const;
133        virtual float           msecsPerFrame() const;
134
135        virtual status_t        open(
136                uint32_t sampleRate, int channelCount, int format,
137                int bufferCount = 1,
138                AudioCallback cb = NULL, void *cookie = NULL);
139
140        virtual void            start() {}
141        virtual ssize_t         write(const void* buffer, size_t size);
142        virtual void            stop() {}
143        virtual void            flush() {}
144        virtual void            pause() {}
145        virtual void            close() {}
146                void            setAudioStreamType(int streamType) {}
147                void            setVolume(float left, float right) {}
148                uint32_t        sampleRate() const { return mSampleRate; }
149                uint32_t        format() const { return (uint32_t)mFormat; }
150                size_t          size() const { return mSize; }
151                status_t        wait();
152
153                sp<IMemoryHeap> getHeap() const { return mHeap; }
154
155        static  void            notify(void* cookie, int msg, int ext1, int ext2);
156        virtual status_t        dump(int fd, const Vector<String16>& args) const;
157
158    private:
159                                AudioCache();
160
161        Mutex               mLock;
162        Condition           mSignal;
163        sp<MemoryHeapBase>  mHeap;
164        float               mMsecsPerFrame;
165        uint16_t            mChannelCount;
166        uint16_t            mFormat;
167        ssize_t             mFrameCount;
168        uint32_t            mSampleRate;
169        uint32_t            mSize;
170        int                 mError;
171        bool                mCommandComplete;
172    };
173
174public:
175    static  void                instantiate();
176
177    // IMediaPlayerService interface
178    virtual sp<IMediaRecorder>  createMediaRecorder(pid_t pid);
179    void    removeMediaRecorderClient(wp<MediaRecorderClient> client);
180    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid);
181
182    // House keeping for media player clients
183    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url);
184    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length);
185    virtual sp<IMemory>         decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
186    virtual sp<IMemory>         decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
187    virtual sp<IMemory>         snoop();
188    virtual sp<IOMX>            getOMX();
189
190    virtual status_t            dump(int fd, const Vector<String16>& args);
191
192            void                removeClient(wp<Client> client);
193
194
195private:
196
197    class Client : public BnMediaPlayer {
198
199        // IMediaPlayer interface
200        virtual void            disconnect();
201        virtual status_t        setVideoSurface(const sp<ISurface>& surface);
202        virtual status_t        prepareAsync();
203        virtual status_t        start();
204        virtual status_t        stop();
205        virtual status_t        pause();
206        virtual status_t        isPlaying(bool* state);
207        virtual status_t        seekTo(int msec);
208        virtual status_t        getCurrentPosition(int* msec);
209        virtual status_t        getDuration(int* msec);
210        virtual status_t        reset();
211        virtual status_t        setAudioStreamType(int type);
212        virtual status_t        setLooping(int loop);
213        virtual status_t        setVolume(float leftVolume, float rightVolume);
214        virtual status_t        invoke(const Parcel& request, Parcel *reply);
215        virtual status_t        setMetadataFilter(const Parcel& filter);
216        virtual status_t        getMetadata(bool update_only,
217                                            bool apply_filter,
218                                            Parcel *reply);
219
220        sp<MediaPlayerBase>     createPlayer(player_type playerType);
221                status_t        setDataSource(const char *url);
222                status_t        setDataSource(int fd, int64_t offset, int64_t length);
223        static  void            notify(void* cookie, int msg, int ext1, int ext2);
224
225                pid_t           pid() const { return mPid; }
226        virtual status_t        dump(int fd, const Vector<String16>& args) const;
227
228    private:
229        friend class MediaPlayerService;
230                                Client( const sp<MediaPlayerService>& service,
231                                        pid_t pid,
232                                        int32_t connId,
233                                        const sp<IMediaPlayerClient>& client);
234                                Client();
235        virtual                 ~Client();
236
237                void            deletePlayer();
238
239        sp<MediaPlayerBase>     getPlayer() const { Mutex::Autolock lock(mLock); return mPlayer; }
240
241
242
243        // @param type Of the metadata to be tested.
244        // @return true if the metadata should be dropped according to
245        //              the filters.
246        bool shouldDropMetadata(media::Metadata::Type type) const;
247
248        // Add a new element to the set of metadata updated. Noop if
249        // the element exists already.
250        // @param type Of the metadata to be recorded.
251        void addNewMetadataUpdate(media::Metadata::Type type);
252
253        mutable     Mutex                       mLock;
254                    sp<MediaPlayerBase>         mPlayer;
255                    sp<MediaPlayerService>      mService;
256                    sp<IMediaPlayerClient>      mClient;
257                    sp<AudioOutput>             mAudioOutput;
258                    pid_t                       mPid;
259                    status_t                    mStatus;
260                    bool                        mLoop;
261                    int32_t                     mConnId;
262
263        // Metadata filters.
264        media::Metadata::Filter mMetadataAllow;  // protected by mLock
265        media::Metadata::Filter mMetadataDrop;  // protected by mLock
266
267        // Metadata updated. For each MEDIA_INFO_METADATA_UPDATE
268        // notification we try to update mMetadataUpdated which is a
269        // set: no duplicate.
270        // getMetadata clears this set.
271        media::Metadata::Filter mMetadataUpdated;  // protected by mLock
272
273#if CALLBACK_ANTAGONIZER
274                    Antagonizer*                mAntagonizer;
275#endif
276    };
277
278// ----------------------------------------------------------------------------
279
280                            MediaPlayerService();
281    virtual                 ~MediaPlayerService();
282
283    mutable     Mutex                       mLock;
284                SortedVector< wp<Client> >  mClients;
285                SortedVector< wp<MediaRecorderClient> > mMediaRecorderClients;
286                int32_t                     mNextConnId;
287                sp<IOMX>                    mOMX;
288};
289
290// ----------------------------------------------------------------------------
291
292}; // namespace android
293
294#endif // ANDROID_MEDIAPLAYERSERVICE_H
295