MediaPlayerService.h revision a514bdb58b5de4986679f72b7204b4764f7a2778 
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(int sessionId);
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        int                     mSessionId;
112
113        static bool             mIsOnEmulator;
114        static int              mMinBufferCount;  // 12 for emulator; otherwise 4
115
116        public: // visualization hack support
117        uint32_t                mNumFramesWritten;
118        void                    snoopWrite(const void*, size_t);
119    };
120
121    class AudioCache : public MediaPlayerBase::AudioSink
122    {
123    public:
124                                AudioCache(const char* name);
125        virtual                 ~AudioCache() {}
126
127        virtual bool            ready() const { return (mChannelCount > 0) && (mHeap->getHeapID() > 0); }
128        virtual bool            realtime() const { return false; }
129        virtual ssize_t         bufferSize() const { return frameSize() * mFrameCount; }
130        virtual ssize_t         frameCount() const { return mFrameCount; }
131        virtual ssize_t         channelCount() const { return (ssize_t)mChannelCount; }
132        virtual ssize_t         frameSize() const { return ssize_t(mChannelCount * ((mFormat == AudioSystem::PCM_16_BIT)?sizeof(int16_t):sizeof(u_int8_t))); }
133        virtual uint32_t        latency() const;
134        virtual float           msecsPerFrame() const;
135        virtual status_t        getPosition(uint32_t *position);
136
137        virtual status_t        open(
138                uint32_t sampleRate, int channelCount, int format,
139                int bufferCount = 1,
140                AudioCallback cb = NULL, void *cookie = NULL);
141
142        virtual void            start();
143        virtual ssize_t         write(const void* buffer, size_t size);
144        virtual void            stop();
145        virtual void            flush() {}
146        virtual void            pause() {}
147        virtual void            close() {}
148                void            setAudioStreamType(int streamType) {}
149                void            setVolume(float left, float right) {}
150                uint32_t        sampleRate() const { return mSampleRate; }
151                uint32_t        format() const { return (uint32_t)mFormat; }
152                size_t          size() const { return mSize; }
153                status_t        wait();
154
155                sp<IMemoryHeap> getHeap() const { return mHeap; }
156
157        static  void            notify(void* cookie, int msg, int ext1, int ext2);
158        virtual status_t        dump(int fd, const Vector<String16>& args) const;
159
160    private:
161                                AudioCache();
162
163        Mutex               mLock;
164        Condition           mSignal;
165        sp<MemoryHeapBase>  mHeap;
166        float               mMsecsPerFrame;
167        uint16_t            mChannelCount;
168        uint16_t            mFormat;
169        ssize_t             mFrameCount;
170        uint32_t            mSampleRate;
171        uint32_t            mSize;
172        int                 mError;
173        bool                mCommandComplete;
174
175        sp<Thread>          mCallbackThread;
176    };
177
178public:
179    static  void                instantiate();
180
181    // IMediaPlayerService interface
182    virtual sp<IMediaRecorder>  createMediaRecorder(pid_t pid);
183    void    removeMediaRecorderClient(wp<MediaRecorderClient> client);
184    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid);
185
186    // House keeping for media player clients
187    virtual sp<IMediaPlayer>    create(
188            pid_t pid, const sp<IMediaPlayerClient>& client, const char* url,
189            const KeyedVector<String8, String8> *headers, int audioSessionId);
190
191    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length, int audioSessionId);
192    virtual sp<IMemory>         decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
193    virtual sp<IMemory>         decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
194    virtual sp<IMemory>         snoop();
195    virtual sp<IOMX>            getOMX();
196
197    virtual status_t            dump(int fd, const Vector<String16>& args);
198
199            void                removeClient(wp<Client> client);
200
201
202private:
203
204    class Client : public BnMediaPlayer {
205
206        // IMediaPlayer interface
207        virtual void            disconnect();
208        virtual status_t        setVideoSurface(const sp<ISurface>& surface);
209        virtual status_t        prepareAsync();
210        virtual status_t        start();
211        virtual status_t        stop();
212        virtual status_t        pause();
213        virtual status_t        isPlaying(bool* state);
214        virtual status_t        seekTo(int msec);
215        virtual status_t        getCurrentPosition(int* msec);
216        virtual status_t        getDuration(int* msec);
217        virtual status_t        reset();
218        virtual status_t        setAudioStreamType(int type);
219        virtual status_t        setLooping(int loop);
220        virtual status_t        setVolume(float leftVolume, float rightVolume);
221        virtual status_t        invoke(const Parcel& request, Parcel *reply);
222        virtual status_t        setMetadataFilter(const Parcel& filter);
223        virtual status_t        getMetadata(bool update_only,
224                                            bool apply_filter,
225                                            Parcel *reply);
226        virtual status_t        suspend();
227        virtual status_t        resume();
228
229        sp<MediaPlayerBase>     createPlayer(player_type playerType);
230
231                status_t        setDataSource(
232                        const char *url,
233                        const KeyedVector<String8, String8> *headers);
234
235                status_t        setDataSource(int fd, int64_t offset, int64_t length);
236        static  void            notify(void* cookie, int msg, int ext1, int ext2);
237
238                pid_t           pid() const { return mPid; }
239        virtual status_t        dump(int fd, const Vector<String16>& args) const;
240
241                int             getAudioSessionId() { return mAudioSessionId; }
242
243    private:
244        friend class MediaPlayerService;
245                                Client( const sp<MediaPlayerService>& service,
246                                        pid_t pid,
247                                        int32_t connId,
248                                        const sp<IMediaPlayerClient>& client,
249                                        int audioSessionId);
250                                Client();
251        virtual                 ~Client();
252
253                void            deletePlayer();
254
255        sp<MediaPlayerBase>     getPlayer() const { Mutex::Autolock lock(mLock); return mPlayer; }
256
257
258
259        // @param type Of the metadata to be tested.
260        // @return true if the metadata should be dropped according to
261        //              the filters.
262        bool shouldDropMetadata(media::Metadata::Type type) const;
263
264        // Add a new element to the set of metadata updated. Noop if
265        // the element exists already.
266        // @param type Of the metadata to be recorded.
267        void addNewMetadataUpdate(media::Metadata::Type type);
268
269        mutable     Mutex                       mLock;
270                    sp<MediaPlayerBase>         mPlayer;
271                    sp<MediaPlayerService>      mService;
272                    sp<IMediaPlayerClient>      mClient;
273                    sp<AudioOutput>             mAudioOutput;
274                    pid_t                       mPid;
275                    status_t                    mStatus;
276                    bool                        mLoop;
277                    int32_t                     mConnId;
278                    int                         mAudioSessionId;
279
280        // Metadata filters.
281        media::Metadata::Filter mMetadataAllow;  // protected by mLock
282        media::Metadata::Filter mMetadataDrop;  // protected by mLock
283
284        // Metadata updated. For each MEDIA_INFO_METADATA_UPDATE
285        // notification we try to update mMetadataUpdated which is a
286        // set: no duplicate.
287        // getMetadata clears this set.
288        media::Metadata::Filter mMetadataUpdated;  // protected by mLock
289
290#if CALLBACK_ANTAGONIZER
291                    Antagonizer*                mAntagonizer;
292#endif
293    };
294
295// ----------------------------------------------------------------------------
296
297                            MediaPlayerService();
298    virtual                 ~MediaPlayerService();
299
300    mutable     Mutex                       mLock;
301                SortedVector< wp<Client> >  mClients;
302                SortedVector< wp<MediaRecorderClient> > mMediaRecorderClients;
303                int32_t                     mNextConnId;
304                sp<IOMX>                    mOMX;
305};
306
307// ----------------------------------------------------------------------------
308
309}; // namespace android
310
311#endif // ANDROID_MEDIAPLAYERSERVICE_H
312