MediaPlayerService.h revision a64c8c79af1a15911c55306d83a797fa50969f77 
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/Vector.h>
27#include <ui/SurfaceComposerClient.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;
38
39#define CALLBACK_ANTAGONIZER 0
40#if CALLBACK_ANTAGONIZER
41class Antagonizer {
42public:
43    Antagonizer(notify_callback_f cb, void* client);
44    void start() { mActive = true; }
45    void stop() { mActive = false; }
46    void kill();
47private:
48    static const int interval;
49    Antagonizer();
50    static int callbackThread(void* cookie);
51    Mutex               mLock;
52    Condition           mCondition;
53    bool                mExit;
54    bool                mActive;
55    void*               mClient;
56    notify_callback_f   mCb;
57};
58#endif
59
60class MediaPlayerService : public BnMediaPlayerService
61{
62    class Client;
63
64    class AudioOutput : public MediaPlayerBase::AudioSink
65    {
66    public:
67                                AudioOutput();
68        virtual                 ~AudioOutput();
69
70        virtual bool            ready() const { return mTrack != NULL; }
71        virtual bool            realtime() const { return true; }
72        virtual ssize_t         bufferSize() const;
73        virtual ssize_t         frameCount() const;
74        virtual ssize_t         channelCount() const;
75        virtual ssize_t         frameSize() const;
76        virtual uint32_t        latency() const;
77        virtual float           msecsPerFrame() const;
78
79        virtual status_t        open(
80                uint32_t sampleRate, int channelCount,
81                int format, int bufferCount,
82                AudioCallback cb, void *cookie);
83
84        virtual void            start();
85        virtual ssize_t         write(const void* buffer, size_t size);
86        virtual void            stop();
87        virtual void            flush();
88        virtual void            pause();
89        virtual void            close();
90                void            setAudioStreamType(int streamType) { mStreamType = streamType; }
91                void            setVolume(float left, float right);
92        virtual status_t        dump(int fd, const Vector<String16>& args) const;
93
94        static bool             isOnEmulator();
95        static int              getMinBufferCount();
96    private:
97        static void             setMinBufferCount();
98        static void             CallbackWrapper(
99                int event, void *me, void *info);
100
101        AudioTrack*             mTrack;
102        AudioCallback           mCallback;
103        void *                  mCallbackCookie;
104        int                     mStreamType;
105        float                   mLeftVolume;
106        float                   mRightVolume;
107        float                   mMsecsPerFrame;
108        uint32_t                mLatency;
109
110        // TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround
111        static const uint32_t   kAudioVideoDelayMs;
112        static bool             mIsOnEmulator;
113        static int              mMinBufferCount;  // 12 for emulator; otherwise 4
114
115    };
116
117    class AudioCache : public MediaPlayerBase::AudioSink
118    {
119    public:
120                                AudioCache(const char* name);
121        virtual                 ~AudioCache() {}
122
123        virtual bool            ready() const { return (mChannelCount > 0) && (mHeap->getHeapID() > 0); }
124        virtual bool            realtime() const { return false; }
125        virtual ssize_t         bufferSize() const { return frameSize() * mFrameCount; }
126        virtual ssize_t         frameCount() const { return mFrameCount; }
127        virtual ssize_t         channelCount() const { return (ssize_t)mChannelCount; }
128        virtual ssize_t         frameSize() const { return ssize_t(mChannelCount * ((mFormat == AudioSystem::PCM_16_BIT)?sizeof(int16_t):sizeof(u_int8_t))); }
129        virtual uint32_t        latency() const;
130        virtual float           msecsPerFrame() const;
131
132        virtual status_t        open(
133                uint32_t sampleRate, int channelCount, int format,
134                int bufferCount = 1,
135                AudioCallback cb = NULL, void *cookie = NULL);
136
137        virtual void            start() {}
138        virtual ssize_t         write(const void* buffer, size_t size);
139        virtual void            stop() {}
140        virtual void            flush() {}
141        virtual void            pause() {}
142        virtual void            close() {}
143                void            setAudioStreamType(int streamType) {}
144                void            setVolume(float left, float right) {}
145                uint32_t        sampleRate() const { return mSampleRate; }
146                uint32_t        format() const { return (uint32_t)mFormat; }
147                size_t          size() const { return mSize; }
148                status_t        wait();
149
150                sp<IMemoryHeap> getHeap() const { return mHeap; }
151
152        static  void            notify(void* cookie, int msg, int ext1, int ext2);
153        virtual status_t        dump(int fd, const Vector<String16>& args) const;
154
155    private:
156                                AudioCache();
157
158        Mutex               mLock;
159        Condition           mSignal;
160        sp<MemoryHeapBase>  mHeap;
161        float               mMsecsPerFrame;
162        uint16_t            mChannelCount;
163        uint16_t            mFormat;
164        ssize_t             mFrameCount;
165        uint32_t            mSampleRate;
166        uint32_t            mSize;
167        int                 mError;
168        bool                mCommandComplete;
169    };
170
171public:
172    static  void                instantiate();
173
174    // IMediaPlayerService interface
175    virtual sp<IMediaRecorder>  createMediaRecorder(pid_t pid);
176    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid);
177
178    // House keeping for media player clients
179    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url);
180    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length);
181    virtual sp<IMemory>         decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
182    virtual sp<IMemory>         decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
183    virtual sp<IOMX>            createOMX();
184
185    virtual status_t            dump(int fd, const Vector<String16>& args);
186
187            void                removeClient(wp<Client> client);
188
189
190private:
191
192    class Client : public BnMediaPlayer {
193
194        // IMediaPlayer interface
195        virtual void            disconnect();
196        virtual status_t        setVideoSurface(const sp<ISurface>& surface);
197        virtual status_t        prepareAsync();
198        virtual status_t        start();
199        virtual status_t        stop();
200        virtual status_t        pause();
201        virtual status_t        isPlaying(bool* state);
202        virtual status_t        seekTo(int msec);
203        virtual status_t        getCurrentPosition(int* msec);
204        virtual status_t        getDuration(int* msec);
205        virtual status_t        reset();
206        virtual status_t        setAudioStreamType(int type);
207        virtual status_t        setLooping(int loop);
208        virtual status_t        setVolume(float leftVolume, float rightVolume);
209        virtual status_t        invoke(const Parcel& request, Parcel *reply);
210        virtual status_t        setMetadataFilter(const Parcel& filter);
211        virtual status_t        getMetadata(bool update_only,
212                                            bool apply_filter,
213                                            Parcel *reply);
214
215        sp<MediaPlayerBase>     createPlayer(player_type playerType);
216                status_t        setDataSource(const char *url);
217                status_t        setDataSource(int fd, int64_t offset, int64_t length);
218        static  void            notify(void* cookie, int msg, int ext1, int ext2);
219
220                pid_t           pid() const { return mPid; }
221        virtual status_t        dump(int fd, const Vector<String16>& args) const;
222
223    private:
224        friend class MediaPlayerService;
225                                Client( const sp<MediaPlayerService>& service,
226                                        pid_t pid,
227                                        int32_t connId,
228                                        const sp<IMediaPlayerClient>& client);
229                                Client();
230        virtual                 ~Client();
231
232                void            deletePlayer();
233
234        sp<MediaPlayerBase>     getPlayer() const { Mutex::Autolock lock(mLock); return mPlayer; }
235
236
237
238        // @param type Of the metadata to be tested.
239        // @return true if the metadata should be dropped according to
240        //              the filters.
241        bool shouldDropMetadata(media::Metadata::Type type) const;
242
243        // Add a new element to the set of metadata updated. Noop if
244        // the element exists already.
245        // @param type Of the metadata to be recorded.
246        void addNewMetadataUpdate(media::Metadata::Type type);
247
248        mutable     Mutex                       mLock;
249                    sp<MediaPlayerBase>         mPlayer;
250                    sp<MediaPlayerService>      mService;
251                    sp<IMediaPlayerClient>      mClient;
252                    sp<AudioOutput>             mAudioOutput;
253                    pid_t                       mPid;
254                    status_t                    mStatus;
255                    bool                        mLoop;
256                    int32_t                     mConnId;
257
258        // Metadata filters.
259        media::Metadata::Filter mMetadataAllow;  // protected by mLock
260        media::Metadata::Filter mMetadataDrop;  // protected by mLock
261
262        // Metadata updated. For each MEDIA_INFO_METADATA_UPDATE
263        // notification we try to update mMetadataUpdated which is a
264        // set: no duplicate.
265        // getMetadata clears this set.
266        media::Metadata::Filter mMetadataUpdated;  // protected by mLock
267
268#if CALLBACK_ANTAGONIZER
269                    Antagonizer*                mAntagonizer;
270#endif
271    };
272
273// ----------------------------------------------------------------------------
274
275                            MediaPlayerService();
276    virtual                 ~MediaPlayerService();
277
278    mutable     Mutex                       mLock;
279                SortedVector< wp<Client> >  mClients;
280                int32_t                     mNextConnId;
281};
282
283// ----------------------------------------------------------------------------
284
285}; // namespace android
286
287#endif // ANDROID_MEDIAPLAYERSERVICE_H
288