MediaPlayerService.h revision 7a8b0ed6419e57dd8b41d3806893d63d3df91aab 
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
33#include <system/audio.h>
34
35namespace android {
36
37class AudioTrack;
38class IMediaRecorder;
39class IMediaMetadataRetriever;
40class IOMX;
41class MediaRecorderClient;
42
43#define CALLBACK_ANTAGONIZER 0
44#if CALLBACK_ANTAGONIZER
45class Antagonizer {
46public:
47    Antagonizer(notify_callback_f cb, void* client);
48    void start() { mActive = true; }
49    void stop() { mActive = false; }
50    void kill();
51private:
52    static const int interval;
53    Antagonizer();
54    static int callbackThread(void* cookie);
55    Mutex               mLock;
56    Condition           mCondition;
57    bool                mExit;
58    bool                mActive;
59    void*               mClient;
60    notify_callback_f   mCb;
61};
62#endif
63
64class MediaPlayerService : public BnMediaPlayerService
65{
66    class Client;
67
68    class AudioOutput : public MediaPlayerBase::AudioSink
69    {
70    public:
71                                AudioOutput(int sessionId);
72        virtual                 ~AudioOutput();
73
74        virtual bool            ready() const { return mTrack != NULL; }
75        virtual bool            realtime() const { return true; }
76        virtual ssize_t         bufferSize() const;
77        virtual ssize_t         frameCount() const;
78        virtual ssize_t         channelCount() const;
79        virtual ssize_t         frameSize() const;
80        virtual uint32_t        latency() const;
81        virtual float           msecsPerFrame() const;
82        virtual status_t        getPosition(uint32_t *position);
83        virtual int             getSessionId();
84
85        virtual status_t        open(
86                uint32_t sampleRate, int channelCount,
87                audio_format_t format, int bufferCount,
88                AudioCallback cb, void *cookie);
89
90        virtual void            start();
91        virtual ssize_t         write(const void* buffer, size_t size);
92        virtual void            stop();
93        virtual void            flush();
94        virtual void            pause();
95        virtual void            close();
96                void            setAudioStreamType(audio_stream_type_t streamType) { mStreamType = streamType; }
97                void            setVolume(float left, float right);
98        virtual status_t        setPlaybackRatePermille(int32_t ratePermille);
99                status_t        setAuxEffectSendLevel(float level);
100                status_t        attachAuxEffect(int effectId);
101        virtual status_t        dump(int fd, const Vector<String16>& args) const;
102
103        static bool             isOnEmulator();
104        static int              getMinBufferCount();
105    private:
106        static void             setMinBufferCount();
107        static void             CallbackWrapper(
108                int event, void *me, void *info);
109
110        AudioTrack*             mTrack;
111        AudioCallback           mCallback;
112        void *                  mCallbackCookie;
113        audio_stream_type_t     mStreamType;
114        float                   mLeftVolume;
115        float                   mRightVolume;
116        int32_t                 mPlaybackRatePermille;
117        uint32_t                mSampleRateHz; // sample rate of the content, as set in open()
118        float                   mMsecsPerFrame;
119        uint32_t                mLatency;
120        int                     mSessionId;
121        float                   mSendLevel;
122        int                     mAuxEffectId;
123        static bool             mIsOnEmulator;
124        static int              mMinBufferCount;  // 12 for emulator; otherwise 4
125
126    };
127
128    class AudioCache : public MediaPlayerBase::AudioSink
129    {
130    public:
131                                AudioCache(const char* name);
132        virtual                 ~AudioCache() {}
133
134        virtual bool            ready() const { return (mChannelCount > 0) && (mHeap->getHeapID() > 0); }
135        virtual bool            realtime() const { return false; }
136        virtual ssize_t         bufferSize() const { return frameSize() * mFrameCount; }
137        virtual ssize_t         frameCount() const { return mFrameCount; }
138        virtual ssize_t         channelCount() const { return (ssize_t)mChannelCount; }
139        virtual ssize_t         frameSize() const { return ssize_t(mChannelCount * ((mFormat == AUDIO_FORMAT_PCM_16_BIT)?sizeof(int16_t):sizeof(u_int8_t))); }
140        virtual uint32_t        latency() const;
141        virtual float           msecsPerFrame() const;
142        virtual status_t        getPosition(uint32_t *position);
143        virtual int             getSessionId();
144
145        virtual status_t        open(
146                uint32_t sampleRate, int channelCount, audio_format_t format,
147                int bufferCount = 1,
148                AudioCallback cb = NULL, void *cookie = NULL);
149
150        virtual void            start();
151        virtual ssize_t         write(const void* buffer, size_t size);
152        virtual void            stop();
153        virtual void            flush() {}
154        virtual void            pause() {}
155        virtual void            close() {}
156                void            setAudioStreamType(audio_stream_type_t streamType) {}
157                void            setVolume(float left, float right) {}
158        virtual status_t        setPlaybackRatePermille(int32_t ratePermille) { return INVALID_OPERATION; }
159                uint32_t        sampleRate() const { return mSampleRate; }
160                audio_format_t  format() const { return mFormat; }
161                size_t          size() const { return mSize; }
162                status_t        wait();
163
164                sp<IMemoryHeap> getHeap() const { return mHeap; }
165
166        static  void            notify(void* cookie, int msg,
167                                       int ext1, int ext2, const Parcel *obj);
168        virtual status_t        dump(int fd, const Vector<String16>& args) const;
169
170    private:
171                                AudioCache();
172
173        Mutex               mLock;
174        Condition           mSignal;
175        sp<MemoryHeapBase>  mHeap;
176        float               mMsecsPerFrame;
177        uint16_t            mChannelCount;
178        audio_format_t      mFormat;
179        ssize_t             mFrameCount;
180        uint32_t            mSampleRate;
181        uint32_t            mSize;
182        int                 mError;
183        bool                mCommandComplete;
184
185        sp<Thread>          mCallbackThread;
186    };
187
188public:
189    static  void                instantiate();
190
191    // IMediaPlayerService interface
192    virtual sp<IMediaRecorder>  createMediaRecorder(pid_t pid);
193    void    removeMediaRecorderClient(wp<MediaRecorderClient> client);
194    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid);
195
196    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, int audioSessionId);
197
198    virtual sp<IMemory>         decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat);
199    virtual sp<IMemory>         decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat);
200    virtual sp<IOMX>            getOMX();
201
202    virtual status_t            dump(int fd, const Vector<String16>& args);
203
204            void                removeClient(wp<Client> client);
205
206    // For battery usage tracking purpose
207    struct BatteryUsageInfo {
208        // how many streams are being played by one UID
209        int     refCount;
210        // a temp variable to store the duration(ms) of audio codecs
211        // when we start a audio codec, we minus the system time from audioLastTime
212        // when we pause it, we add the system time back to the audioLastTime
213        // so after the pause, audioLastTime = pause time - start time
214        // if multiple audio streams are played (or recorded), then audioLastTime
215        // = the total playing time of all the streams
216        int32_t audioLastTime;
217        // when all the audio streams are being paused, we assign audioLastTime to
218        // this variable, so this value could be provided to the battery app
219        // in the next pullBatteryData call
220        int32_t audioTotalTime;
221
222        int32_t videoLastTime;
223        int32_t videoTotalTime;
224    };
225    KeyedVector<int, BatteryUsageInfo>    mBatteryData;
226
227    enum {
228        SPEAKER,
229        OTHER_AUDIO_DEVICE,
230        SPEAKER_AND_OTHER,
231        NUM_AUDIO_DEVICES
232    };
233
234    struct BatteryAudioFlingerUsageInfo {
235        int refCount; // how many audio streams are being played
236        int deviceOn[NUM_AUDIO_DEVICES]; // whether the device is currently used
237        int32_t lastTime[NUM_AUDIO_DEVICES]; // in ms
238        // totalTime[]: total time of audio output devices usage
239        int32_t totalTime[NUM_AUDIO_DEVICES]; // in ms
240    };
241
242    // This varialble is used to record the usage of audio output device
243    // for battery app
244    BatteryAudioFlingerUsageInfo mBatteryAudio;
245
246    // Collect info of the codec usage from media player and media recorder
247    virtual void                addBatteryData(uint32_t params);
248    // API for the Battery app to pull the data of codecs usage
249    virtual status_t            pullBatteryData(Parcel* reply);
250private:
251
252    class Client : public BnMediaPlayer {
253
254        // IMediaPlayer interface
255        virtual void            disconnect();
256        virtual status_t        setVideoSurfaceTexture(
257                                        const sp<ISurfaceTexture>& surfaceTexture);
258        virtual status_t        prepareAsync();
259        virtual status_t        start();
260        virtual status_t        stop();
261        virtual status_t        pause();
262        virtual status_t        isPlaying(bool* state);
263        virtual status_t        seekTo(int msec);
264        virtual status_t        getCurrentPosition(int* msec);
265        virtual status_t        getDuration(int* msec);
266        virtual status_t        reset();
267        virtual status_t        setAudioStreamType(audio_stream_type_t type);
268        virtual status_t        setLooping(int loop);
269        virtual status_t        setVolume(float leftVolume, float rightVolume);
270        virtual status_t        invoke(const Parcel& request, Parcel *reply);
271        virtual status_t        setMetadataFilter(const Parcel& filter);
272        virtual status_t        getMetadata(bool update_only,
273                                            bool apply_filter,
274                                            Parcel *reply);
275        virtual status_t        setAuxEffectSendLevel(float level);
276        virtual status_t        attachAuxEffect(int effectId);
277        virtual status_t        setParameter(int key, const Parcel &request);
278        virtual status_t        getParameter(int key, Parcel *reply);
279
280        sp<MediaPlayerBase>     createPlayer(player_type playerType);
281
282        virtual status_t        setDataSource(
283                        const char *url,
284                        const KeyedVector<String8, String8> *headers);
285
286        virtual status_t        setDataSource(int fd, int64_t offset, int64_t length);
287
288        virtual status_t        setDataSource(const sp<IStreamSource> &source);
289
290        static  void            notify(void* cookie, int msg,
291                                       int ext1, int ext2, const Parcel *obj);
292
293                pid_t           pid() const { return mPid; }
294        virtual status_t        dump(int fd, const Vector<String16>& args) const;
295
296                int             getAudioSessionId() { return mAudioSessionId; }
297
298    private:
299        friend class MediaPlayerService;
300                                Client( const sp<MediaPlayerService>& service,
301                                        pid_t pid,
302                                        int32_t connId,
303                                        const sp<IMediaPlayerClient>& client,
304                                        int audioSessionId,
305                                        uid_t uid);
306                                Client();
307        virtual                 ~Client();
308
309                void            deletePlayer();
310
311        sp<MediaPlayerBase>     getPlayer() const { Mutex::Autolock lock(mLock); return mPlayer; }
312
313
314
315        // @param type Of the metadata to be tested.
316        // @return true if the metadata should be dropped according to
317        //              the filters.
318        bool shouldDropMetadata(media::Metadata::Type type) const;
319
320        // Add a new element to the set of metadata updated. Noop if
321        // the element exists already.
322        // @param type Of the metadata to be recorded.
323        void addNewMetadataUpdate(media::Metadata::Type type);
324
325        // Disconnect from the currently connected ANativeWindow.
326        void disconnectNativeWindow();
327
328        mutable     Mutex                       mLock;
329                    sp<MediaPlayerBase>         mPlayer;
330                    sp<MediaPlayerService>      mService;
331                    sp<IMediaPlayerClient>      mClient;
332                    sp<AudioOutput>             mAudioOutput;
333                    pid_t                       mPid;
334                    status_t                    mStatus;
335                    bool                        mLoop;
336                    int32_t                     mConnId;
337                    int                         mAudioSessionId;
338                    uid_t                       mUID;
339                    sp<ANativeWindow>           mConnectedWindow;
340                    sp<IBinder>                 mConnectedWindowBinder;
341
342        // Metadata filters.
343        media::Metadata::Filter mMetadataAllow;  // protected by mLock
344        media::Metadata::Filter mMetadataDrop;  // protected by mLock
345
346        // Metadata updated. For each MEDIA_INFO_METADATA_UPDATE
347        // notification we try to update mMetadataUpdated which is a
348        // set: no duplicate.
349        // getMetadata clears this set.
350        media::Metadata::Filter mMetadataUpdated;  // protected by mLock
351
352#if CALLBACK_ANTAGONIZER
353                    Antagonizer*                mAntagonizer;
354#endif
355    };
356
357// ----------------------------------------------------------------------------
358
359                            MediaPlayerService();
360    virtual                 ~MediaPlayerService();
361
362    mutable     Mutex                       mLock;
363                SortedVector< wp<Client> >  mClients;
364                SortedVector< wp<MediaRecorderClient> > mMediaRecorderClients;
365                int32_t                     mNextConnId;
366                sp<IOMX>                    mOMX;
367};
368
369// ----------------------------------------------------------------------------
370
371}; // namespace android
372
373#endif // ANDROID_MEDIAPLAYERSERVICE_H
374