MediaPlayerService.h revision da7581b7b61b84f15e8d671c86fd117c322b009e 
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    };
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        virtual status_t        getPosition(uint32_t *position);
133
134        virtual status_t        open(
135                uint32_t sampleRate, int channelCount, int format,
136                int bufferCount = 1,
137                AudioCallback cb = NULL, void *cookie = NULL);
138
139        virtual void            start();
140        virtual ssize_t         write(const void* buffer, size_t size);
141        virtual void            stop();
142        virtual void            flush() {}
143        virtual void            pause() {}
144        virtual void            close() {}
145                void            setAudioStreamType(int streamType) {}
146                void            setVolume(float left, float right) {}
147                uint32_t        sampleRate() const { return mSampleRate; }
148                uint32_t        format() const { return (uint32_t)mFormat; }
149                size_t          size() const { return mSize; }
150                status_t        wait();
151
152                sp<IMemoryHeap> getHeap() const { return mHeap; }
153
154        static  void            notify(void* cookie, int msg, int ext1, int ext2);
155        virtual status_t        dump(int fd, const Vector<String16>& args) const;
156
157    private:
158                                AudioCache();
159
160        Mutex               mLock;
161        Condition           mSignal;
162        sp<MemoryHeapBase>  mHeap;
163        float               mMsecsPerFrame;
164        uint16_t            mChannelCount;
165        uint16_t            mFormat;
166        ssize_t             mFrameCount;
167        uint32_t            mSampleRate;
168        uint32_t            mSize;
169        int                 mError;
170        bool                mCommandComplete;
171
172        sp<Thread>          mCallbackThread;
173    };
174
175public:
176    static  void                instantiate();
177
178    // IMediaPlayerService interface
179    virtual sp<IMediaRecorder>  createMediaRecorder(pid_t pid);
180    void    removeMediaRecorderClient(wp<MediaRecorderClient> client);
181    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid);
182
183    // House keeping for media player clients
184    virtual sp<IMediaPlayer>    create(
185            pid_t pid, const sp<IMediaPlayerClient>& client, const char* url,
186            const KeyedVector<String8, String8> *headers, int audioSessionId);
187
188    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length, int audioSessionId);
189    virtual sp<IMemory>         decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
190    virtual sp<IMemory>         decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
191    virtual sp<IOMX>            getOMX();
192
193    virtual status_t            dump(int fd, const Vector<String16>& args);
194
195            void                removeClient(wp<Client> client);
196
197
198private:
199
200    class Client : public BnMediaPlayer {
201
202        // IMediaPlayer interface
203        virtual void            disconnect();
204        virtual status_t        setVideoSurface(const sp<ISurface>& surface);
205        virtual status_t        prepareAsync();
206        virtual status_t        start();
207        virtual status_t        stop();
208        virtual status_t        pause();
209        virtual status_t        isPlaying(bool* state);
210        virtual status_t        seekTo(int msec);
211        virtual status_t        getCurrentPosition(int* msec);
212        virtual status_t        getDuration(int* msec);
213        virtual status_t        reset();
214        virtual status_t        setAudioStreamType(int type);
215        virtual status_t        setLooping(int loop);
216        virtual status_t        setVolume(float leftVolume, float rightVolume);
217        virtual status_t        invoke(const Parcel& request, Parcel *reply);
218        virtual status_t        setMetadataFilter(const Parcel& filter);
219        virtual status_t        getMetadata(bool update_only,
220                                            bool apply_filter,
221                                            Parcel *reply);
222        virtual status_t        suspend();
223        virtual status_t        resume();
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                int             getAudioSessionId() { return mAudioSessionId; }
238
239    private:
240        friend class MediaPlayerService;
241                                Client( const sp<MediaPlayerService>& service,
242                                        pid_t pid,
243                                        int32_t connId,
244                                        const sp<IMediaPlayerClient>& client,
245                                        int audioSessionId);
246                                Client();
247        virtual                 ~Client();
248
249                void            deletePlayer();
250
251        sp<MediaPlayerBase>     getPlayer() const { Mutex::Autolock lock(mLock); return mPlayer; }
252
253
254
255        // @param type Of the metadata to be tested.
256        // @return true if the metadata should be dropped according to
257        //              the filters.
258        bool shouldDropMetadata(media::Metadata::Type type) const;
259
260        // Add a new element to the set of metadata updated. Noop if
261        // the element exists already.
262        // @param type Of the metadata to be recorded.
263        void addNewMetadataUpdate(media::Metadata::Type type);
264
265        mutable     Mutex                       mLock;
266                    sp<MediaPlayerBase>         mPlayer;
267                    sp<MediaPlayerService>      mService;
268                    sp<IMediaPlayerClient>      mClient;
269                    sp<AudioOutput>             mAudioOutput;
270                    pid_t                       mPid;
271                    status_t                    mStatus;
272                    bool                        mLoop;
273                    int32_t                     mConnId;
274                    int                         mAudioSessionId;
275
276        // Metadata filters.
277        media::Metadata::Filter mMetadataAllow;  // protected by mLock
278        media::Metadata::Filter mMetadataDrop;  // protected by mLock
279
280        // Metadata updated. For each MEDIA_INFO_METADATA_UPDATE
281        // notification we try to update mMetadataUpdated which is a
282        // set: no duplicate.
283        // getMetadata clears this set.
284        media::Metadata::Filter mMetadataUpdated;  // protected by mLock
285
286#if CALLBACK_ANTAGONIZER
287                    Antagonizer*                mAntagonizer;
288#endif
289    };
290
291// ----------------------------------------------------------------------------
292
293                            MediaPlayerService();
294    virtual                 ~MediaPlayerService();
295
296    mutable     Mutex                       mLock;
297                SortedVector< wp<Client> >  mClients;
298                SortedVector< wp<MediaRecorderClient> > mMediaRecorderClients;
299                int32_t                     mNextConnId;
300                sp<IOMX>                    mOMX;
301};
302
303// ----------------------------------------------------------------------------
304
305}; // namespace android
306
307#endif // ANDROID_MEDIAPLAYERSERVICE_H
308