MediaPlayerService.h revision 3cf613507f1e2f7bd932d921a6e222e426fd3be4 
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/String8.h>
27#include <utils/Vector.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        virtual status_t        getPosition(uint32_t *position);
80
81        virtual status_t        open(
82                uint32_t sampleRate, int channelCount,
83                int format, int bufferCount,
84                AudioCallback cb, void *cookie);
85
86        virtual void            start();
87        virtual ssize_t         write(const void* buffer, size_t size);
88        virtual void            stop();
89        virtual void            flush();
90        virtual void            pause();
91        virtual void            close();
92                void            setAudioStreamType(int streamType) { mStreamType = streamType; }
93                void            setVolume(float left, float right);
94        virtual status_t        dump(int fd, const Vector<String16>& args) const;
95
96        static bool             isOnEmulator();
97        static int              getMinBufferCount();
98    private:
99        static void             setMinBufferCount();
100        static void             CallbackWrapper(
101                int event, void *me, void *info);
102
103        AudioTrack*             mTrack;
104        AudioCallback           mCallback;
105        void *                  mCallbackCookie;
106        int                     mStreamType;
107        float                   mLeftVolume;
108        float                   mRightVolume;
109        float                   mMsecsPerFrame;
110        uint32_t                mLatency;
111
112        static bool             mIsOnEmulator;
113        static int              mMinBufferCount;  // 12 for emulator; otherwise 4
114
115        public: // visualization hack support
116        uint32_t                mNumFramesWritten;
117        void                    snoopWrite(const void*, size_t);
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        virtual status_t        getPosition(uint32_t *position);
135
136        virtual status_t        open(
137                uint32_t sampleRate, int channelCount, int format,
138                int bufferCount = 1,
139                AudioCallback cb = NULL, void *cookie = NULL);
140
141        virtual void            start();
142        virtual ssize_t         write(const void* buffer, size_t size);
143        virtual void            stop();
144        virtual void            flush() {}
145        virtual void            pause() {}
146        virtual void            close() {}
147                void            setAudioStreamType(int streamType) {}
148                void            setVolume(float left, float right) {}
149                uint32_t        sampleRate() const { return mSampleRate; }
150                uint32_t        format() const { return (uint32_t)mFormat; }
151                size_t          size() const { return mSize; }
152                status_t        wait();
153
154                sp<IMemoryHeap> getHeap() const { return mHeap; }
155
156        static  void            notify(void* cookie, int msg, int ext1, int ext2);
157        virtual status_t        dump(int fd, const Vector<String16>& args) const;
158
159    private:
160                                AudioCache();
161
162        Mutex               mLock;
163        Condition           mSignal;
164        sp<MemoryHeapBase>  mHeap;
165        float               mMsecsPerFrame;
166        uint16_t            mChannelCount;
167        uint16_t            mFormat;
168        ssize_t             mFrameCount;
169        uint32_t            mSampleRate;
170        uint32_t            mSize;
171        int                 mError;
172        bool                mCommandComplete;
173
174        sp<Thread>          mCallbackThread;
175    };
176
177public:
178    static  void                instantiate();
179
180    // IMediaPlayerService interface
181    virtual sp<IMediaRecorder>  createMediaRecorder(pid_t pid);
182    void    removeMediaRecorderClient(wp<MediaRecorderClient> client);
183    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid);
184
185    // House keeping for media player clients
186    virtual sp<IMediaPlayer>    create(
187            pid_t pid, const sp<IMediaPlayerClient>& client, const char* url,
188            const KeyedVector<String8, String8> *headers);
189
190    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length);
191    virtual sp<IMemory>         decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
192    virtual sp<IMemory>         decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
193    virtual sp<IMemory>         snoop();
194    virtual sp<IOMX>            getOMX();
195
196    virtual status_t            dump(int fd, const Vector<String16>& args);
197
198            void                removeClient(wp<Client> client);
199
200
201private:
202
203    class Client : public BnMediaPlayer {
204
205        // IMediaPlayer interface
206        virtual void            disconnect();
207        virtual status_t        setVideoSurface(const sp<ISurface>& surface);
208        virtual status_t        prepareAsync();
209        virtual status_t        start();
210        virtual status_t        stop();
211        virtual status_t        pause();
212        virtual status_t        isPlaying(bool* state);
213        virtual status_t        seekTo(int msec);
214        virtual status_t        getCurrentPosition(int* msec);
215        virtual status_t        getDuration(int* msec);
216        virtual status_t        reset();
217        virtual status_t        setAudioStreamType(int type);
218        virtual status_t        setLooping(int loop);
219        virtual status_t        setVolume(float leftVolume, float rightVolume);
220        virtual status_t        invoke(const Parcel& request, Parcel *reply);
221        virtual status_t        setMetadataFilter(const Parcel& filter);
222        virtual status_t        getMetadata(bool update_only,
223                                            bool apply_filter,
224                                            Parcel *reply);
225
226        sp<MediaPlayerBase>     createPlayer(player_type playerType);
227
228                status_t        setDataSource(
229                        const char *url,
230                        const KeyedVector<String8, String8> *headers);
231
232                status_t        setDataSource(int fd, int64_t offset, int64_t length);
233        static  void            notify(void* cookie, int msg, int ext1, int ext2);
234
235                pid_t           pid() const { return mPid; }
236        virtual status_t        dump(int fd, const Vector<String16>& args) const;
237
238    private:
239        friend class MediaPlayerService;
240                                Client( const sp<MediaPlayerService>& service,
241                                        pid_t pid,
242                                        int32_t connId,
243                                        const sp<IMediaPlayerClient>& client);
244                                Client();
245        virtual                 ~Client();
246
247                void            deletePlayer();
248
249        sp<MediaPlayerBase>     getPlayer() const { Mutex::Autolock lock(mLock); return mPlayer; }
250
251
252
253        // @param type Of the metadata to be tested.
254        // @return true if the metadata should be dropped according to
255        //              the filters.
256        bool shouldDropMetadata(media::Metadata::Type type) const;
257
258        // Add a new element to the set of metadata updated. Noop if
259        // the element exists already.
260        // @param type Of the metadata to be recorded.
261        void addNewMetadataUpdate(media::Metadata::Type type);
262
263        mutable     Mutex                       mLock;
264                    sp<MediaPlayerBase>         mPlayer;
265                    sp<MediaPlayerService>      mService;
266                    sp<IMediaPlayerClient>      mClient;
267                    sp<AudioOutput>             mAudioOutput;
268                    pid_t                       mPid;
269                    status_t                    mStatus;
270                    bool                        mLoop;
271                    int32_t                     mConnId;
272
273        // Metadata filters.
274        media::Metadata::Filter mMetadataAllow;  // protected by mLock
275        media::Metadata::Filter mMetadataDrop;  // protected by mLock
276
277        // Metadata updated. For each MEDIA_INFO_METADATA_UPDATE
278        // notification we try to update mMetadataUpdated which is a
279        // set: no duplicate.
280        // getMetadata clears this set.
281        media::Metadata::Filter mMetadataUpdated;  // protected by mLock
282
283#if CALLBACK_ANTAGONIZER
284                    Antagonizer*                mAntagonizer;
285#endif
286    };
287
288// ----------------------------------------------------------------------------
289
290                            MediaPlayerService();
291    virtual                 ~MediaPlayerService();
292
293    mutable     Mutex                       mLock;
294                SortedVector< wp<Client> >  mClients;
295                SortedVector< wp<MediaRecorderClient> > mMediaRecorderClients;
296                int32_t                     mNextConnId;
297                sp<IOMX>                    mOMX;
298};
299
300// ----------------------------------------------------------------------------
301
302}; // namespace android
303
304#endif // ANDROID_MEDIAPLAYERSERVICE_H
305