MediaPlayerService.h revision 7b5eb023f8d87cca6d830ae6c11c6aadbe02aca8 
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.h>
22#include <utils/KeyedVector.h>
23#include <ui/SurfaceComposerClient.h>
24
25#include <media/IMediaPlayerService.h>
26#include <media/MediaPlayerInterface.h>
27
28namespace android {
29
30class IMediaRecorder;
31class IMediaMetadataRetriever;
32
33#define CALLBACK_ANTAGONIZER 0
34#if CALLBACK_ANTAGONIZER
35class Antagonizer {
36public:
37    Antagonizer(notify_callback_f cb, void* client);
38    void start() { mActive = true; }
39    void stop() { mActive = false; }
40    void kill();
41private:
42    static const int interval;
43    Antagonizer();
44    static int callbackThread(void* cookie);
45    Mutex               mLock;
46    Condition           mCondition;
47    bool                mExit;
48    bool                mActive;
49    void*               mClient;
50    notify_callback_f   mCb;
51};
52#endif
53
54class MediaPlayerService : public BnMediaPlayerService
55{
56    class Client;
57
58    class AudioOutput : public MediaPlayerBase::AudioSink
59    {
60    public:
61                                AudioOutput();
62        virtual                 ~AudioOutput();
63
64        virtual bool            ready() const { return mTrack != NULL; }
65        virtual bool            realtime() const { return true; }
66        virtual ssize_t         bufferSize() const;
67        virtual ssize_t         frameCount() const;
68        virtual ssize_t         channelCount() const;
69        virtual ssize_t         frameSize() const;
70        virtual uint32_t        latency() const;
71        virtual float           msecsPerFrame() const;
72        virtual status_t        open(uint32_t sampleRate, int channelCount, int format, int bufferCount=4);
73        virtual void            start();
74        virtual ssize_t         write(const void* buffer, size_t size);
75        virtual void            stop();
76        virtual void            flush();
77        virtual void            pause();
78        virtual void            close();
79                void            setAudioStreamType(int streamType) { mStreamType = streamType; }
80                void            setVolume(float left, float right);
81        virtual status_t        dump(int fd, const Vector<String16>& args) const;
82
83        static bool             isOnEmulator();
84        static int              getMinBufferCount();
85    private:
86        static void             setMinBufferCount();
87
88        AudioTrack*             mTrack;
89        int                     mStreamType;
90        float                   mLeftVolume;
91        float                   mRightVolume;
92        float                   mMsecsPerFrame;
93        uint32_t                mLatency;
94
95        // TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround
96        static const uint32_t   kAudioVideoDelayMs;
97        static bool             mIsOnEmulator;
98        static int              mMinBufferCount;  // 12 for emulator; otherwise 4
99
100    };
101
102    class AudioCache : public MediaPlayerBase::AudioSink
103    {
104    public:
105                                AudioCache(const char* name);
106        virtual                 ~AudioCache() {}
107
108        virtual bool            ready() const { return (mChannelCount > 0) && (mHeap->getHeapID() > 0); }
109        virtual bool            realtime() const { return false; }
110        virtual ssize_t         bufferSize() const { return frameSize() * mFrameCount; }
111        virtual ssize_t         frameCount() const { return mFrameCount; }
112        virtual ssize_t         channelCount() const { return (ssize_t)mChannelCount; }
113        virtual ssize_t         frameSize() const { return ssize_t(mChannelCount * ((mFormat == AudioSystem::PCM_16_BIT)?sizeof(int16_t):sizeof(u_int8_t))); }
114        virtual uint32_t        latency() const;
115        virtual float           msecsPerFrame() const;
116        virtual status_t        open(uint32_t sampleRate, int channelCount, int format, int bufferCount=1);
117        virtual void            start() {}
118        virtual ssize_t         write(const void* buffer, size_t size);
119        virtual void            stop() {}
120        virtual void            flush() {}
121        virtual void            pause() {}
122        virtual void            close() {}
123                void            setAudioStreamType(int streamType) {}
124                void            setVolume(float left, float right) {}
125                uint32_t        sampleRate() const { return mSampleRate; }
126                uint32_t        format() const { return (uint32_t)mFormat; }
127                size_t          size() const { return mSize; }
128                status_t        wait();
129
130                sp<IMemoryHeap> getHeap() const { return mHeap; }
131
132        static  void            notify(void* cookie, int msg, int ext1, int ext2);
133        virtual status_t        dump(int fd, const Vector<String16>& args) const;
134
135    private:
136                                AudioCache();
137
138        Mutex               mLock;
139        Condition           mSignal;
140        sp<MemoryHeapBase>  mHeap;
141        float               mMsecsPerFrame;
142        uint16_t            mChannelCount;
143        uint16_t			mFormat;
144        ssize_t             mFrameCount;
145        uint32_t            mSampleRate;
146        uint32_t            mSize;
147        int                 mError;
148        bool                mCommandComplete;
149    };
150
151public:
152    static  void                instantiate();
153
154    // IMediaPlayerService interface
155    virtual sp<IMediaRecorder>  createMediaRecorder(pid_t pid);
156    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid);
157
158    // House keeping for media player clients
159    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url);
160    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length);
161    virtual sp<IMemory>         decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
162    virtual sp<IMemory>         decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat);
163
164    virtual status_t            dump(int fd, const Vector<String16>& args);
165
166            void                removeClient(wp<Client> client);
167
168private:
169
170    class Client : public BnMediaPlayer {
171
172        // IMediaPlayer interface
173        virtual void            disconnect();
174        virtual status_t        setVideoSurface(const sp<ISurface>& surface);
175        virtual status_t        prepareAsync();
176        virtual status_t        start();
177        virtual status_t        stop();
178        virtual status_t        pause();
179        virtual status_t        isPlaying(bool* state);
180        virtual status_t        seekTo(int msec);
181        virtual status_t        getCurrentPosition(int* msec);
182        virtual status_t        getDuration(int* msec);
183        virtual status_t        reset();
184        virtual status_t        setAudioStreamType(int type);
185        virtual status_t        setLooping(int loop);
186        virtual status_t        setVolume(float leftVolume, float rightVolume);
187
188        sp<MediaPlayerBase>     createPlayer(player_type playerType);
189                status_t        setDataSource(const char *url);
190                status_t        setDataSource(int fd, int64_t offset, int64_t length);
191        static  void            notify(void* cookie, int msg, int ext1, int ext2);
192
193                pid_t           pid() const { return mPid; }
194        virtual status_t        dump(int fd, const Vector<String16>& args) const;
195
196    private:
197        friend class MediaPlayerService;
198                                Client( const sp<MediaPlayerService>& service,
199                                        pid_t pid,
200                                        int32_t connId,
201                                        const sp<IMediaPlayerClient>& client);
202                                Client();
203        virtual                 ~Client();
204
205                void            deletePlayer();
206
207        sp<MediaPlayerBase>     getPlayer() const { Mutex::Autolock lock(mLock); return mPlayer; }
208
209        mutable     Mutex                       mLock;
210                    sp<MediaPlayerBase>         mPlayer;
211                    sp<MediaPlayerService>      mService;
212                    sp<IMediaPlayerClient>      mClient;
213                    sp<AudioOutput>             mAudioOutput;
214                    pid_t                       mPid;
215                    status_t                    mStatus;
216                    bool                        mLoop;
217                    int32_t                     mConnId;
218#if CALLBACK_ANTAGONIZER
219                    Antagonizer*                mAntagonizer;
220#endif
221    };
222
223// ----------------------------------------------------------------------------
224
225                            MediaPlayerService();
226    virtual                 ~MediaPlayerService();
227
228    mutable     Mutex                       mLock;
229                SortedVector< wp<Client> >  mClients;
230                int32_t                     mNextConnId;
231};
232
233// ----------------------------------------------------------------------------
234
235}; // namespace android
236
237#endif // ANDROID_MEDIAPLAYERSERVICE_H
238
239