MediaPlayerService.h revision 7ee8ac94bb1a724a481a7cddf10ce63d35df6296
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; 38class MediaRecorderClient; 39 40#define CALLBACK_ANTAGONIZER 0 41#if CALLBACK_ANTAGONIZER 42class Antagonizer { 43public: 44 Antagonizer(notify_callback_f cb, void* client); 45 void start() { mActive = true; } 46 void stop() { mActive = false; } 47 void kill(); 48private: 49 static const int interval; 50 Antagonizer(); 51 static int callbackThread(void* cookie); 52 Mutex mLock; 53 Condition mCondition; 54 bool mExit; 55 bool mActive; 56 void* mClient; 57 notify_callback_f mCb; 58}; 59#endif 60 61class MediaPlayerService : public BnMediaPlayerService 62{ 63 class Client; 64 65 class AudioOutput : public MediaPlayerBase::AudioSink 66 { 67 public: 68 AudioOutput(); 69 virtual ~AudioOutput(); 70 71 virtual bool ready() const { return mTrack != NULL; } 72 virtual bool realtime() const { return true; } 73 virtual ssize_t bufferSize() const; 74 virtual ssize_t frameCount() const; 75 virtual ssize_t channelCount() const; 76 virtual ssize_t frameSize() const; 77 virtual uint32_t latency() const; 78 virtual float msecsPerFrame() const; 79 80 virtual status_t open( 81 uint32_t sampleRate, int channelCount, 82 int format, int bufferCount, 83 AudioCallback cb, void *cookie); 84 85 virtual void start(); 86 virtual ssize_t write(const void* buffer, size_t size); 87 virtual void stop(); 88 virtual void flush(); 89 virtual void pause(); 90 virtual void close(); 91 void setAudioStreamType(int streamType) { mStreamType = streamType; } 92 void setVolume(float left, float right); 93 virtual status_t dump(int fd, const Vector<String16>& args) const; 94 95 static bool isOnEmulator(); 96 static int getMinBufferCount(); 97 private: 98 static void setMinBufferCount(); 99 static void CallbackWrapper( 100 int event, void *me, void *info); 101 102 AudioTrack* mTrack; 103 AudioCallback mCallback; 104 void * mCallbackCookie; 105 int mStreamType; 106 float mLeftVolume; 107 float mRightVolume; 108 float mMsecsPerFrame; 109 uint32_t mLatency; 110 111 static bool mIsOnEmulator; 112 static int mMinBufferCount; // 12 for emulator; otherwise 4 113 114 public: // visualization hack support 115 uint32_t mNumFramesWritten; 116 void snoopWrite(const void*, size_t); 117 }; 118 119 class AudioCache : public MediaPlayerBase::AudioSink 120 { 121 public: 122 AudioCache(const char* name); 123 virtual ~AudioCache() {} 124 125 virtual bool ready() const { return (mChannelCount > 0) && (mHeap->getHeapID() > 0); } 126 virtual bool realtime() const { return false; } 127 virtual ssize_t bufferSize() const { return frameSize() * mFrameCount; } 128 virtual ssize_t frameCount() const { return mFrameCount; } 129 virtual ssize_t channelCount() const { return (ssize_t)mChannelCount; } 130 virtual ssize_t frameSize() const { return ssize_t(mChannelCount * ((mFormat == AudioSystem::PCM_16_BIT)?sizeof(int16_t):sizeof(u_int8_t))); } 131 virtual uint32_t latency() const; 132 virtual float msecsPerFrame() const; 133 134 virtual status_t open( 135 uint32_t sampleRate, int channelCount, int format, 136 int bufferCount = 1, 137 AudioCallback cb = NULL, void *cookie = NULL); 138 139 virtual void start() {} 140 virtual ssize_t write(const void* buffer, size_t size); 141 virtual void stop() {} 142 virtual void flush() {} 143 virtual void pause() {} 144 virtual void close() {} 145 void setAudioStreamType(int streamType) {} 146 void setVolume(float left, float right) {} 147 uint32_t sampleRate() const { return mSampleRate; } 148 uint32_t format() const { return (uint32_t)mFormat; } 149 size_t size() const { return mSize; } 150 status_t wait(); 151 152 sp<IMemoryHeap> getHeap() const { return mHeap; } 153 154 static void notify(void* cookie, int msg, int ext1, int ext2); 155 virtual status_t dump(int fd, const Vector<String16>& args) const; 156 157 private: 158 AudioCache(); 159 160 Mutex mLock; 161 Condition mSignal; 162 sp<MemoryHeapBase> mHeap; 163 float mMsecsPerFrame; 164 uint16_t mChannelCount; 165 uint16_t mFormat; 166 ssize_t mFrameCount; 167 uint32_t mSampleRate; 168 uint32_t mSize; 169 int mError; 170 bool mCommandComplete; 171 }; 172 173public: 174 static void instantiate(); 175 176 // IMediaPlayerService interface 177 virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid); 178 void removeMediaRecorderClient(wp<MediaRecorderClient> client); 179 virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid); 180 181 // House keeping for media player clients 182 virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url); 183 virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length); 184 virtual sp<IMemory> decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat); 185 virtual sp<IMemory> decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat); 186 virtual sp<IMemory> snoop(); 187 virtual sp<IOMX> getOMX(); 188 189 virtual status_t dump(int fd, const Vector<String16>& args); 190 191 void removeClient(wp<Client> client); 192 193 194private: 195 196 class Client : public BnMediaPlayer { 197 198 // IMediaPlayer interface 199 virtual void disconnect(); 200 virtual status_t setVideoSurface(const sp<ISurface>& surface); 201 virtual status_t prepareAsync(); 202 virtual status_t start(); 203 virtual status_t stop(); 204 virtual status_t pause(); 205 virtual status_t isPlaying(bool* state); 206 virtual status_t seekTo(int msec); 207 virtual status_t getCurrentPosition(int* msec); 208 virtual status_t getDuration(int* msec); 209 virtual status_t reset(); 210 virtual status_t setAudioStreamType(int type); 211 virtual status_t setLooping(int loop); 212 virtual status_t setVolume(float leftVolume, float rightVolume); 213 virtual status_t invoke(const Parcel& request, Parcel *reply); 214 virtual status_t setMetadataFilter(const Parcel& filter); 215 virtual status_t getMetadata(bool update_only, 216 bool apply_filter, 217 Parcel *reply); 218 219 sp<MediaPlayerBase> createPlayer(player_type playerType); 220 status_t setDataSource(const char *url); 221 status_t setDataSource(int fd, int64_t offset, int64_t length); 222 static void notify(void* cookie, int msg, int ext1, int ext2); 223 224 pid_t pid() const { return mPid; } 225 virtual status_t dump(int fd, const Vector<String16>& args) const; 226 227 private: 228 friend class MediaPlayerService; 229 Client( const sp<MediaPlayerService>& service, 230 pid_t pid, 231 int32_t connId, 232 const sp<IMediaPlayerClient>& client); 233 Client(); 234 virtual ~Client(); 235 236 void deletePlayer(); 237 238 sp<MediaPlayerBase> getPlayer() const { Mutex::Autolock lock(mLock); return mPlayer; } 239 240 241 242 // @param type Of the metadata to be tested. 243 // @return true if the metadata should be dropped according to 244 // the filters. 245 bool shouldDropMetadata(media::Metadata::Type type) const; 246 247 // Add a new element to the set of metadata updated. Noop if 248 // the element exists already. 249 // @param type Of the metadata to be recorded. 250 void addNewMetadataUpdate(media::Metadata::Type type); 251 252 mutable Mutex mLock; 253 sp<MediaPlayerBase> mPlayer; 254 sp<MediaPlayerService> mService; 255 sp<IMediaPlayerClient> mClient; 256 sp<AudioOutput> mAudioOutput; 257 pid_t mPid; 258 status_t mStatus; 259 bool mLoop; 260 int32_t mConnId; 261 262 // Metadata filters. 263 media::Metadata::Filter mMetadataAllow; // protected by mLock 264 media::Metadata::Filter mMetadataDrop; // protected by mLock 265 266 // Metadata updated. For each MEDIA_INFO_METADATA_UPDATE 267 // notification we try to update mMetadataUpdated which is a 268 // set: no duplicate. 269 // getMetadata clears this set. 270 media::Metadata::Filter mMetadataUpdated; // protected by mLock 271 272#if CALLBACK_ANTAGONIZER 273 Antagonizer* mAntagonizer; 274#endif 275 }; 276 277// ---------------------------------------------------------------------------- 278 279 MediaPlayerService(); 280 virtual ~MediaPlayerService(); 281 282 mutable Mutex mLock; 283 SortedVector< wp<Client> > mClients; 284 SortedVector< wp<MediaRecorderClient> > mMediaRecorderClients; 285 int32_t mNextConnId; 286 sp<IOMX> mOMX; 287}; 288 289// ---------------------------------------------------------------------------- 290 291}; // namespace android 292 293#endif // ANDROID_MEDIAPLAYERSERVICE_H 294