MediaPlayerService.h revision 7d5b8a70c28c0d5746a600467b2887822dbff88e
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#include <ui/SurfaceComposerClient.h> 29 30#include <media/IMediaPlayerService.h> 31#include <media/MediaPlayerInterface.h> 32#include <media/Metadata.h> 33 34namespace android { 35 36class IMediaRecorder; 37class IMediaMetadataRetriever; 38class IOMX; 39class MediaRecorderClient; 40 41#define CALLBACK_ANTAGONIZER 0 42#if CALLBACK_ANTAGONIZER 43class Antagonizer { 44public: 45 Antagonizer(notify_callback_f cb, void* client); 46 void start() { mActive = true; } 47 void stop() { mActive = false; } 48 void kill(); 49private: 50 static const int interval; 51 Antagonizer(); 52 static int callbackThread(void* cookie); 53 Mutex mLock; 54 Condition mCondition; 55 bool mExit; 56 bool mActive; 57 void* mClient; 58 notify_callback_f mCb; 59}; 60#endif 61 62class MediaPlayerService : public BnMediaPlayerService 63{ 64 class Client; 65 66 class AudioOutput : public MediaPlayerBase::AudioSink 67 { 68 public: 69 AudioOutput(); 70 virtual ~AudioOutput(); 71 72 virtual bool ready() const { return mTrack != NULL; } 73 virtual bool realtime() const { return true; } 74 virtual ssize_t bufferSize() const; 75 virtual ssize_t frameCount() const; 76 virtual ssize_t channelCount() const; 77 virtual ssize_t frameSize() const; 78 virtual uint32_t latency() const; 79 virtual float msecsPerFrame() const; 80 virtual status_t getPosition(uint32_t *position); 81 82 virtual status_t open( 83 uint32_t sampleRate, int channelCount, 84 int format, int bufferCount, 85 AudioCallback cb, void *cookie); 86 87 virtual void start(); 88 virtual ssize_t write(const void* buffer, size_t size); 89 virtual void stop(); 90 virtual void flush(); 91 virtual void pause(); 92 virtual void close(); 93 void setAudioStreamType(int streamType) { mStreamType = streamType; } 94 void setVolume(float left, float right); 95 virtual status_t dump(int fd, const Vector<String16>& args) const; 96 97 static bool isOnEmulator(); 98 static int getMinBufferCount(); 99 private: 100 static void setMinBufferCount(); 101 static void CallbackWrapper( 102 int event, void *me, void *info); 103 104 AudioTrack* mTrack; 105 AudioCallback mCallback; 106 void * mCallbackCookie; 107 int mStreamType; 108 float mLeftVolume; 109 float mRightVolume; 110 float mMsecsPerFrame; 111 uint32_t mLatency; 112 113 static bool mIsOnEmulator; 114 static int mMinBufferCount; // 12 for emulator; otherwise 4 115 116 public: // visualization hack support 117 uint32_t mNumFramesWritten; 118 void snoopWrite(const void*, size_t); 119 }; 120 121 class AudioCache : public MediaPlayerBase::AudioSink 122 { 123 public: 124 AudioCache(const char* name); 125 virtual ~AudioCache() {} 126 127 virtual bool ready() const { return (mChannelCount > 0) && (mHeap->getHeapID() > 0); } 128 virtual bool realtime() const { return false; } 129 virtual ssize_t bufferSize() const { return frameSize() * mFrameCount; } 130 virtual ssize_t frameCount() const { return mFrameCount; } 131 virtual ssize_t channelCount() const { return (ssize_t)mChannelCount; } 132 virtual ssize_t frameSize() const { return ssize_t(mChannelCount * ((mFormat == AudioSystem::PCM_16_BIT)?sizeof(int16_t):sizeof(u_int8_t))); } 133 virtual uint32_t latency() const; 134 virtual float msecsPerFrame() const; 135 virtual status_t getPosition(uint32_t *position); 136 137 virtual status_t open( 138 uint32_t sampleRate, int channelCount, int format, 139 int bufferCount = 1, 140 AudioCallback cb = NULL, void *cookie = NULL); 141 142 virtual void start(); 143 virtual ssize_t write(const void* buffer, size_t size); 144 virtual void stop(); 145 virtual void flush() {} 146 virtual void pause() {} 147 virtual void close() {} 148 void setAudioStreamType(int streamType) {} 149 void setVolume(float left, float right) {} 150 uint32_t sampleRate() const { return mSampleRate; } 151 uint32_t format() const { return (uint32_t)mFormat; } 152 size_t size() const { return mSize; } 153 status_t wait(); 154 155 sp<IMemoryHeap> getHeap() const { return mHeap; } 156 157 static void notify(void* cookie, int msg, int ext1, int ext2); 158 virtual status_t dump(int fd, const Vector<String16>& args) const; 159 160 private: 161 AudioCache(); 162 163 Mutex mLock; 164 Condition mSignal; 165 sp<MemoryHeapBase> mHeap; 166 float mMsecsPerFrame; 167 uint16_t mChannelCount; 168 uint16_t mFormat; 169 ssize_t mFrameCount; 170 uint32_t mSampleRate; 171 uint32_t mSize; 172 int mError; 173 bool mCommandComplete; 174 175 sp<Thread> mCallbackThread; 176 }; 177 178public: 179 static void instantiate(); 180 181 // IMediaPlayerService interface 182 virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid); 183 void removeMediaRecorderClient(wp<MediaRecorderClient> client); 184 virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid); 185 186 // House keeping for media player clients 187 virtual sp<IMediaPlayer> create( 188 pid_t pid, const sp<IMediaPlayerClient>& client, const char* url, 189 const KeyedVector<String8, String8> *headers); 190 191 virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length); 192 virtual sp<IMemory> decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat); 193 virtual sp<IMemory> decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat); 194 virtual sp<IMemory> snoop(); 195 virtual sp<IOMX> getOMX(); 196 197 virtual status_t dump(int fd, const Vector<String16>& args); 198 199 void removeClient(wp<Client> client); 200 201 202private: 203 204 class Client : public BnMediaPlayer { 205 206 // IMediaPlayer interface 207 virtual void disconnect(); 208 virtual status_t setVideoSurface(const sp<ISurface>& surface); 209 virtual status_t prepareAsync(); 210 virtual status_t start(); 211 virtual status_t stop(); 212 virtual status_t pause(); 213 virtual status_t isPlaying(bool* state); 214 virtual status_t seekTo(int msec); 215 virtual status_t getCurrentPosition(int* msec); 216 virtual status_t getDuration(int* msec); 217 virtual status_t reset(); 218 virtual status_t setAudioStreamType(int type); 219 virtual status_t setLooping(int loop); 220 virtual status_t setVolume(float leftVolume, float rightVolume); 221 virtual status_t invoke(const Parcel& request, Parcel *reply); 222 virtual status_t setMetadataFilter(const Parcel& filter); 223 virtual status_t getMetadata(bool update_only, 224 bool apply_filter, 225 Parcel *reply); 226 227 sp<MediaPlayerBase> createPlayer(player_type playerType); 228 229 status_t setDataSource( 230 const char *url, 231 const KeyedVector<String8, String8> *headers); 232 233 status_t setDataSource(int fd, int64_t offset, int64_t length); 234 static void notify(void* cookie, int msg, int ext1, int ext2); 235 236 pid_t pid() const { return mPid; } 237 virtual status_t dump(int fd, const Vector<String16>& args) const; 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 Client(); 246 virtual ~Client(); 247 248 void deletePlayer(); 249 250 sp<MediaPlayerBase> getPlayer() const { Mutex::Autolock lock(mLock); return mPlayer; } 251 252 253 254 // @param type Of the metadata to be tested. 255 // @return true if the metadata should be dropped according to 256 // the filters. 257 bool shouldDropMetadata(media::Metadata::Type type) const; 258 259 // Add a new element to the set of metadata updated. Noop if 260 // the element exists already. 261 // @param type Of the metadata to be recorded. 262 void addNewMetadataUpdate(media::Metadata::Type type); 263 264 mutable Mutex mLock; 265 sp<MediaPlayerBase> mPlayer; 266 sp<MediaPlayerService> mService; 267 sp<IMediaPlayerClient> mClient; 268 sp<AudioOutput> mAudioOutput; 269 pid_t mPid; 270 status_t mStatus; 271 bool mLoop; 272 int32_t mConnId; 273 274 // Metadata filters. 275 media::Metadata::Filter mMetadataAllow; // protected by mLock 276 media::Metadata::Filter mMetadataDrop; // protected by mLock 277 278 // Metadata updated. For each MEDIA_INFO_METADATA_UPDATE 279 // notification we try to update mMetadataUpdated which is a 280 // set: no duplicate. 281 // getMetadata clears this set. 282 media::Metadata::Filter mMetadataUpdated; // protected by mLock 283 284#if CALLBACK_ANTAGONIZER 285 Antagonizer* mAntagonizer; 286#endif 287 }; 288 289// ---------------------------------------------------------------------------- 290 291 MediaPlayerService(); 292 virtual ~MediaPlayerService(); 293 294 mutable Mutex mLock; 295 SortedVector< wp<Client> > mClients; 296 SortedVector< wp<MediaRecorderClient> > mMediaRecorderClients; 297 int32_t mNextConnId; 298 sp<IOMX> mOMX; 299}; 300 301// ---------------------------------------------------------------------------- 302 303}; // namespace android 304 305#endif // ANDROID_MEDIAPLAYERSERVICE_H 306