MediaPlayerService.h revision 2db8455d8f4468a637109d31f319ce02d9d743ec 
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#include <ui/SurfaceComposerClient.h>
29
30#include <media/IMediaPlayerService.h>
31#include <media/MediaPlayerInterface.h>
32#include <media/Metadata.h>
33
34namespace android {
35
36class IMediaRecorder;
37class IMediaMetadataRetriever;
38class IOMX;
39class MediaRecorderClient;
40
41#define CALLBACK_ANTAGONIZER 0
42#if CALLBACK_ANTAGONIZER
43class Antagonizer {
44public:
45    Antagonizer(notify_callback_f cb, void* client);
46    void start() { mActive = true; }
47    void stop() { mActive = false; }
48    void kill();
49private:
50    static const int interval;
51    Antagonizer();
52    static int callbackThread(void* cookie);
53    Mutex               mLock;
54    Condition           mCondition;
55    bool                mExit;
56    bool                mActive;
57    void*               mClient;
58    notify_callback_f   mCb;
59};
60#endif
61
62class MediaPlayerService : public BnMediaPlayerService
63{
64    class Client;
65
66    class AudioOutput : public MediaPlayerBase::AudioSink
67    {
68    public:
69                                AudioOutput();
70        virtual                 ~AudioOutput();
71
72        virtual bool            ready() const { return mTrack != NULL; }
73        virtual bool            realtime() const { return true; }
74        virtual ssize_t         bufferSize() const;
75        virtual ssize_t         frameCount() const;
76        virtual ssize_t         channelCount() const;
77        virtual ssize_t         frameSize() const;
78        virtual uint32_t        latency() const;
79        virtual float           msecsPerFrame() const;
80        virtual status_t        getPosition(uint32_t *position);
81
82        virtual status_t        open(
83                uint32_t sampleRate, int channelCount,
84                int format, int bufferCount,
85                AudioCallback cb, void *cookie);
86
87        virtual void            start();
88        virtual ssize_t         write(const void* buffer, size_t size);
89        virtual void            stop();
90        virtual void            flush();
91        virtual void            pause();
92        virtual void            close();
93                void            setAudioStreamType(int streamType) { mStreamType = streamType; }
94                void            setVolume(float left, float right);
95        virtual status_t        dump(int fd, const Vector<String16>& args) const;
96
97        static bool             isOnEmulator();
98        static int              getMinBufferCount();
99    private:
100        static void             setMinBufferCount();
101        static void             CallbackWrapper(
102                int event, void *me, void *info);
103
104        AudioTrack*             mTrack;
105        AudioCallback           mCallback;
106        void *                  mCallbackCookie;
107        int                     mStreamType;
108        float                   mLeftVolume;
109        float                   mRightVolume;
110        float                   mMsecsPerFrame;
111        uint32_t                mLatency;
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
176public:
177    static  void                instantiate();
178
179    // IMediaPlayerService interface
180    virtual sp<IMediaRecorder>  createMediaRecorder(pid_t pid);
181    void    removeMediaRecorderClient(wp<MediaRecorderClient> client);
182    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid);
183
184    // House keeping for media player clients
185    virtual sp<IMediaPlayer>    create(
186            pid_t pid, const sp<IMediaPlayerClient>& client, const char* url,
187            const KeyedVector<String8, String8> *headers);
188
189    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length);
190    virtual sp<IMemory>         decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
191    virtual sp<IMemory>         decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
192    virtual sp<IMemory>         snoop();
193    virtual sp<IOMX>            getOMX();
194
195    virtual status_t            dump(int fd, const Vector<String16>& args);
196
197            void                removeClient(wp<Client> client);
198
199
200private:
201
202    class Client : public BnMediaPlayer {
203
204        // IMediaPlayer interface
205        virtual void            disconnect();
206        virtual status_t        setVideoSurface(const sp<ISurface>& surface);
207        virtual status_t        prepareAsync();
208        virtual status_t        start();
209        virtual status_t        stop();
210        virtual status_t        pause();
211        virtual status_t        isPlaying(bool* state);
212        virtual status_t        seekTo(int msec);
213        virtual status_t        getCurrentPosition(int* msec);
214        virtual status_t        getDuration(int* msec);
215        virtual status_t        reset();
216        virtual status_t        setAudioStreamType(int type);
217        virtual status_t        setLooping(int loop);
218        virtual status_t        setVolume(float leftVolume, float rightVolume);
219        virtual status_t        invoke(const Parcel& request, Parcel *reply);
220        virtual status_t        setMetadataFilter(const Parcel& filter);
221        virtual status_t        getMetadata(bool update_only,
222                                            bool apply_filter,
223                                            Parcel *reply);
224
225        sp<MediaPlayerBase>     createPlayer(player_type playerType);
226
227                status_t        setDataSource(
228                        const char *url,
229                        const KeyedVector<String8, String8> *headers);
230
231                status_t        setDataSource(int fd, int64_t offset, int64_t length);
232        static  void            notify(void* cookie, int msg, int ext1, int ext2);
233
234                pid_t           pid() const { return mPid; }
235        virtual status_t        dump(int fd, const Vector<String16>& args) const;
236
237    private:
238        friend class MediaPlayerService;
239                                Client( const sp<MediaPlayerService>& service,
240                                        pid_t pid,
241                                        int32_t connId,
242                                        const sp<IMediaPlayerClient>& client);
243                                Client();
244        virtual                 ~Client();
245
246                void            deletePlayer();
247
248        sp<MediaPlayerBase>     getPlayer() const { Mutex::Autolock lock(mLock); return mPlayer; }
249
250
251
252        // @param type Of the metadata to be tested.
253        // @return true if the metadata should be dropped according to
254        //              the filters.
255        bool shouldDropMetadata(media::Metadata::Type type) const;
256
257        // Add a new element to the set of metadata updated. Noop if
258        // the element exists already.
259        // @param type Of the metadata to be recorded.
260        void addNewMetadataUpdate(media::Metadata::Type type);
261
262        mutable     Mutex                       mLock;
263                    sp<MediaPlayerBase>         mPlayer;
264                    sp<MediaPlayerService>      mService;
265                    sp<IMediaPlayerClient>      mClient;
266                    sp<AudioOutput>             mAudioOutput;
267                    pid_t                       mPid;
268                    status_t                    mStatus;
269                    bool                        mLoop;
270                    int32_t                     mConnId;
271
272        // Metadata filters.
273        media::Metadata::Filter mMetadataAllow;  // protected by mLock
274        media::Metadata::Filter mMetadataDrop;  // protected by mLock
275
276        // Metadata updated. For each MEDIA_INFO_METADATA_UPDATE
277        // notification we try to update mMetadataUpdated which is a
278        // set: no duplicate.
279        // getMetadata clears this set.
280        media::Metadata::Filter mMetadataUpdated;  // protected by mLock
281
282#if CALLBACK_ANTAGONIZER
283                    Antagonizer*                mAntagonizer;
284#endif
285    };
286
287// ----------------------------------------------------------------------------
288
289                            MediaPlayerService();
290    virtual                 ~MediaPlayerService();
291
292    mutable     Mutex                       mLock;
293                SortedVector< wp<Client> >  mClients;
294                SortedVector< wp<MediaRecorderClient> > mMediaRecorderClients;
295                int32_t                     mNextConnId;
296                sp<IOMX>                    mOMX;
297};
298
299// ----------------------------------------------------------------------------
300
301}; // namespace android
302
303#endif // ANDROID_MEDIAPLAYERSERVICE_H
304