MediaPlayerService.h revision 273d098cc72a88c797d01c7dff0c1350f315f05f 
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 <ui/SurfaceComposerClient.h>
27
28#include <media/IMediaPlayerService.h>
29#include <media/MediaPlayerInterface.h>
30
31namespace android {
32
33class IMediaRecorder;
34class IMediaMetadataRetriever;
35
36#define CALLBACK_ANTAGONIZER 0
37#if CALLBACK_ANTAGONIZER
38class Antagonizer {
39public:
40    Antagonizer(notify_callback_f cb, void* client);
41    void start() { mActive = true; }
42    void stop() { mActive = false; }
43    void kill();
44private:
45    static const int interval;
46    Antagonizer();
47    static int callbackThread(void* cookie);
48    Mutex               mLock;
49    Condition           mCondition;
50    bool                mExit;
51    bool                mActive;
52    void*               mClient;
53    notify_callback_f   mCb;
54};
55#endif
56
57class MediaPlayerService : public BnMediaPlayerService
58{
59    class Client;
60
61    class AudioOutput : public MediaPlayerBase::AudioSink
62    {
63    public:
64                                AudioOutput();
65        virtual                 ~AudioOutput();
66
67        virtual bool            ready() const { return mTrack != NULL; }
68        virtual bool            realtime() const { return true; }
69        virtual ssize_t         bufferSize() const;
70        virtual ssize_t         frameCount() const;
71        virtual ssize_t         channelCount() const;
72        virtual ssize_t         frameSize() const;
73        virtual uint32_t        latency() const;
74        virtual float           msecsPerFrame() const;
75        virtual status_t        open(uint32_t sampleRate, int channelCount, int format, int bufferCount=4);
76        virtual void            start();
77        virtual ssize_t         write(const void* buffer, size_t size);
78        virtual void            stop();
79        virtual void            flush();
80        virtual void            pause();
81        virtual void            close();
82                void            setAudioStreamType(int streamType) { mStreamType = streamType; }
83                void            setVolume(float left, float right);
84        virtual status_t        dump(int fd, const Vector<String16>& args) const;
85
86        static bool             isOnEmulator();
87        static int              getMinBufferCount();
88    private:
89        static void             setMinBufferCount();
90
91        AudioTrack*             mTrack;
92        int                     mStreamType;
93        float                   mLeftVolume;
94        float                   mRightVolume;
95        float                   mMsecsPerFrame;
96        uint32_t                mLatency;
97
98        // TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround
99        static const uint32_t   kAudioVideoDelayMs;
100        static bool             mIsOnEmulator;
101        static int              mMinBufferCount;  // 12 for emulator; otherwise 4
102
103    };
104
105    class AudioCache : public MediaPlayerBase::AudioSink
106    {
107    public:
108                                AudioCache(const char* name);
109        virtual                 ~AudioCache() {}
110
111        virtual bool            ready() const { return (mChannelCount > 0) && (mHeap->getHeapID() > 0); }
112        virtual bool            realtime() const { return false; }
113        virtual ssize_t         bufferSize() const { return frameSize() * mFrameCount; }
114        virtual ssize_t         frameCount() const { return mFrameCount; }
115        virtual ssize_t         channelCount() const { return (ssize_t)mChannelCount; }
116        virtual ssize_t         frameSize() const { return ssize_t(mChannelCount * ((mFormat == AudioSystem::PCM_16_BIT)?sizeof(int16_t):sizeof(u_int8_t))); }
117        virtual uint32_t        latency() const;
118        virtual float           msecsPerFrame() const;
119        virtual status_t        open(uint32_t sampleRate, int channelCount, int format, int bufferCount=1);
120        virtual void            start() {}
121        virtual ssize_t         write(const void* buffer, size_t size);
122        virtual void            stop() {}
123        virtual void            flush() {}
124        virtual void            pause() {}
125        virtual void            close() {}
126                void            setAudioStreamType(int streamType) {}
127                void            setVolume(float left, float right) {}
128                uint32_t        sampleRate() const { return mSampleRate; }
129                uint32_t        format() const { return (uint32_t)mFormat; }
130                size_t          size() const { return mSize; }
131                status_t        wait();
132
133                sp<IMemoryHeap> getHeap() const { return mHeap; }
134
135        static  void            notify(void* cookie, int msg, int ext1, int ext2);
136        virtual status_t        dump(int fd, const Vector<String16>& args) const;
137
138    private:
139                                AudioCache();
140
141        Mutex               mLock;
142        Condition           mSignal;
143        sp<MemoryHeapBase>  mHeap;
144        float               mMsecsPerFrame;
145        uint16_t            mChannelCount;
146        uint16_t			mFormat;
147        ssize_t             mFrameCount;
148        uint32_t            mSampleRate;
149        uint32_t            mSize;
150        int                 mError;
151        bool                mCommandComplete;
152    };
153
154public:
155    static  void                instantiate();
156
157    // IMediaPlayerService interface
158    virtual sp<IMediaRecorder>  createMediaRecorder(pid_t pid);
159    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid);
160
161    // House keeping for media player clients
162    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url);
163    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length);
164    virtual sp<IMemory>         decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
165    virtual sp<IMemory>         decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
166
167    virtual status_t            dump(int fd, const Vector<String16>& args);
168
169            void                removeClient(wp<Client> client);
170
171private:
172
173    class Client : public BnMediaPlayer {
174
175        // IMediaPlayer interface
176        virtual void            disconnect();
177        virtual status_t        setVideoSurface(const sp<ISurface>& surface);
178        virtual status_t        prepareAsync();
179        virtual status_t        start();
180        virtual status_t        stop();
181        virtual status_t        pause();
182        virtual status_t        isPlaying(bool* state);
183        virtual status_t        seekTo(int msec);
184        virtual status_t        getCurrentPosition(int* msec);
185        virtual status_t        getDuration(int* msec);
186        virtual status_t        reset();
187        virtual status_t        setAudioStreamType(int type);
188        virtual status_t        setLooping(int loop);
189        virtual status_t        setVolume(float leftVolume, float rightVolume);
190
191        sp<MediaPlayerBase>     createPlayer(player_type playerType);
192                status_t        setDataSource(const char *url);
193                status_t        setDataSource(int fd, int64_t offset, int64_t length);
194        static  void            notify(void* cookie, int msg, int ext1, int ext2);
195
196                pid_t           pid() const { return mPid; }
197        virtual status_t        dump(int fd, const Vector<String16>& args) const;
198
199    private:
200        friend class MediaPlayerService;
201                                Client( const sp<MediaPlayerService>& service,
202                                        pid_t pid,
203                                        int32_t connId,
204                                        const sp<IMediaPlayerClient>& client);
205                                Client();
206        virtual                 ~Client();
207
208                void            deletePlayer();
209
210        sp<MediaPlayerBase>     getPlayer() const { Mutex::Autolock lock(mLock); return mPlayer; }
211
212        mutable     Mutex                       mLock;
213                    sp<MediaPlayerBase>         mPlayer;
214                    sp<MediaPlayerService>      mService;
215                    sp<IMediaPlayerClient>      mClient;
216                    sp<AudioOutput>             mAudioOutput;
217                    pid_t                       mPid;
218                    status_t                    mStatus;
219                    bool                        mLoop;
220                    int32_t                     mConnId;
221#if CALLBACK_ANTAGONIZER
222                    Antagonizer*                mAntagonizer;
223#endif
224    };
225
226// ----------------------------------------------------------------------------
227
228                            MediaPlayerService();
229    virtual                 ~MediaPlayerService();
230
231    mutable     Mutex                       mLock;
232                SortedVector< wp<Client> >  mClients;
233                int32_t                     mNextConnId;
234};
235
236// ----------------------------------------------------------------------------
237
238}; // namespace android
239
240#endif // ANDROID_MEDIAPLAYERSERVICE_H
241
242