MediaPlayerService.h revision 20111aa043c5f404472bc63b90bc5aad906b1101 
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/SortedVector.h>
27#include <utils/Vector.h>
28#include <ui/SurfaceComposerClient.h>
29
30#include <media/IMediaPlayerService.h>
31#include <media/MediaPlayerInterface.h>
32
33namespace android {
34typedef int32_t MetadataType;
35
36class IMediaRecorder;
37class IMediaMetadataRetriever;
38class IOMX;
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    };
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    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid);
178
179    // House keeping for media player clients
180    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url);
181    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length);
182    virtual sp<IMemory>         decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
183    virtual sp<IMemory>         decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
184    virtual sp<IOMX>            createOMX();
185
186    virtual status_t            dump(int fd, const Vector<String16>& args);
187
188            void                removeClient(wp<Client> client);
189
190
191private:
192
193    class Client : public BnMediaPlayer {
194
195        // IMediaPlayer interface
196        virtual void            disconnect();
197        virtual status_t        setVideoSurface(const sp<ISurface>& surface);
198        virtual status_t        prepareAsync();
199        virtual status_t        start();
200        virtual status_t        stop();
201        virtual status_t        pause();
202        virtual status_t        isPlaying(bool* state);
203        virtual status_t        seekTo(int msec);
204        virtual status_t        getCurrentPosition(int* msec);
205        virtual status_t        getDuration(int* msec);
206        virtual status_t        reset();
207        virtual status_t        setAudioStreamType(int type);
208        virtual status_t        setLooping(int loop);
209        virtual status_t        setVolume(float leftVolume, float rightVolume);
210        virtual status_t        invoke(const Parcel& request, Parcel *reply);
211        virtual status_t        setMetadataFilter(const Parcel& filter);
212        virtual status_t        getMetadata(bool update_only,
213                                            bool apply_filter,
214                                            Parcel *reply);
215
216        sp<MediaPlayerBase>     createPlayer(player_type playerType);
217                status_t        setDataSource(const char *url);
218                status_t        setDataSource(int fd, int64_t offset, int64_t length);
219        static  void            notify(void* cookie, int msg, int ext1, int ext2);
220
221                pid_t           pid() const { return mPid; }
222        virtual status_t        dump(int fd, const Vector<String16>& args) const;
223
224    private:
225        friend class MediaPlayerService;
226                                Client( const sp<MediaPlayerService>& service,
227                                        pid_t pid,
228                                        int32_t connId,
229                                        const sp<IMediaPlayerClient>& client);
230                                Client();
231        virtual                 ~Client();
232
233                void            deletePlayer();
234
235        sp<MediaPlayerBase>     getPlayer() const { Mutex::Autolock lock(mLock); return mPlayer; }
236
237
238
239        // @param type Of the metadata to be tested.
240        // @return true if the metadata should be dropped according to
241        //              the filters.
242        bool shouldDropMetadata(MetadataType type) const;
243
244        // Add a new element to the set of metadata updated. Noop if
245        // the element exists already.
246        // @param type Of the metadata to be recorded.
247        void addNewMetadataUpdate(MetadataType type);
248
249        mutable     Mutex                       mLock;
250                    sp<MediaPlayerBase>         mPlayer;
251                    sp<MediaPlayerService>      mService;
252                    sp<IMediaPlayerClient>      mClient;
253                    sp<AudioOutput>             mAudioOutput;
254                    pid_t                       mPid;
255                    status_t                    mStatus;
256                    bool                        mLoop;
257                    int32_t                     mConnId;
258
259        // Metadata filters.
260        SortedVector<int32_t>       mMetadataAllow;  // protected by mLock
261        SortedVector<int32_t>       mMetadataDrop;  // protected by mLock
262
263        // Metadata updated. For each MEDIA_INFO_METADATA_UPDATE
264        // notification we try to update mMetadataUpdated which is a
265        // set: no duplicate.
266        // getMetadata clears this set.
267        SortedVector<int32_t>       mMetadataUpdated;  // protected by mLock
268
269#if CALLBACK_ANTAGONIZER
270                    Antagonizer*                mAntagonizer;
271#endif
272    };
273
274// ----------------------------------------------------------------------------
275
276                            MediaPlayerService();
277    virtual                 ~MediaPlayerService();
278
279    mutable     Mutex                       mLock;
280                SortedVector< wp<Client> >  mClients;
281                int32_t                     mNextConnId;
282};
283
284// ----------------------------------------------------------------------------
285
286}; // namespace android
287
288#endif // ANDROID_MEDIAPLAYERSERVICE_H
289