MediaPlayerService.h revision 342e9cf388cceb807def720e40e8b0a217f4bcaa
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 virtual status_t getPosition(uint32_t *position); 80 81 virtual status_t open( 82 uint32_t sampleRate, int channelCount, 83 int format, int bufferCount, 84 AudioCallback cb, void *cookie); 85 86 virtual void start(); 87 virtual ssize_t write(const void* buffer, size_t size); 88 virtual void stop(); 89 virtual void flush(); 90 virtual void pause(); 91 virtual void close(); 92 void setAudioStreamType(int streamType) { mStreamType = streamType; } 93 void setVolume(float left, float right); 94 virtual status_t dump(int fd, const Vector<String16>& args) const; 95 96 static bool isOnEmulator(); 97 static int getMinBufferCount(); 98 private: 99 static void setMinBufferCount(); 100 static void CallbackWrapper( 101 int event, void *me, void *info); 102 103 AudioTrack* mTrack; 104 AudioCallback mCallback; 105 void * mCallbackCookie; 106 int mStreamType; 107 float mLeftVolume; 108 float mRightVolume; 109 float mMsecsPerFrame; 110 uint32_t mLatency; 111 112 static bool mIsOnEmulator; 113 static int mMinBufferCount; // 12 for emulator; otherwise 4 114 115 public: // visualization hack support 116 uint32_t mNumFramesWritten; 117 void snoopWrite(const void*, size_t); 118 }; 119 120 class AudioCache : public MediaPlayerBase::AudioSink 121 { 122 public: 123 AudioCache(const char* name); 124 virtual ~AudioCache() {} 125 126 virtual bool ready() const { return (mChannelCount > 0) && (mHeap->getHeapID() > 0); } 127 virtual bool realtime() const { return false; } 128 virtual ssize_t bufferSize() const { return frameSize() * mFrameCount; } 129 virtual ssize_t frameCount() const { return mFrameCount; } 130 virtual ssize_t channelCount() const { return (ssize_t)mChannelCount; } 131 virtual ssize_t frameSize() const { return ssize_t(mChannelCount * ((mFormat == AudioSystem::PCM_16_BIT)?sizeof(int16_t):sizeof(u_int8_t))); } 132 virtual uint32_t latency() const; 133 virtual float msecsPerFrame() const; 134 virtual status_t getPosition(uint32_t *position); 135 136 virtual status_t open( 137 uint32_t sampleRate, int channelCount, int format, 138 int bufferCount = 1, 139 AudioCallback cb = NULL, void *cookie = NULL); 140 141 virtual void start() {} 142 virtual ssize_t write(const void* buffer, size_t size); 143 virtual void stop() {} 144 virtual void flush() {} 145 virtual void pause() {} 146 virtual void close() {} 147 void setAudioStreamType(int streamType) {} 148 void setVolume(float left, float right) {} 149 uint32_t sampleRate() const { return mSampleRate; } 150 uint32_t format() const { return (uint32_t)mFormat; } 151 size_t size() const { return mSize; } 152 status_t wait(); 153 154 sp<IMemoryHeap> getHeap() const { return mHeap; } 155 156 static void notify(void* cookie, int msg, int ext1, int ext2); 157 virtual status_t dump(int fd, const Vector<String16>& args) const; 158 159 private: 160 AudioCache(); 161 162 Mutex mLock; 163 Condition mSignal; 164 sp<MemoryHeapBase> mHeap; 165 float mMsecsPerFrame; 166 uint16_t mChannelCount; 167 uint16_t mFormat; 168 ssize_t mFrameCount; 169 uint32_t mSampleRate; 170 uint32_t mSize; 171 int mError; 172 bool mCommandComplete; 173 }; 174 175public: 176 static void instantiate(); 177 178 // IMediaPlayerService interface 179 virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid); 180 void removeMediaRecorderClient(wp<MediaRecorderClient> client); 181 virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid); 182 183 // House keeping for media player clients 184 virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url); 185 virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length); 186 virtual sp<IMemory> decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat); 187 virtual sp<IMemory> decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat); 188 virtual sp<IMemory> snoop(); 189 virtual sp<IOMX> getOMX(); 190 191 virtual status_t dump(int fd, const Vector<String16>& args); 192 193 void removeClient(wp<Client> client); 194 195 196private: 197 198 class Client : public BnMediaPlayer { 199 200 // IMediaPlayer interface 201 virtual void disconnect(); 202 virtual status_t setVideoSurface(const sp<ISurface>& surface); 203 virtual status_t prepareAsync(); 204 virtual status_t start(); 205 virtual status_t stop(); 206 virtual status_t pause(); 207 virtual status_t isPlaying(bool* state); 208 virtual status_t seekTo(int msec); 209 virtual status_t getCurrentPosition(int* msec); 210 virtual status_t getDuration(int* msec); 211 virtual status_t reset(); 212 virtual status_t setAudioStreamType(int type); 213 virtual status_t setLooping(int loop); 214 virtual status_t setVolume(float leftVolume, float rightVolume); 215 virtual status_t invoke(const Parcel& request, Parcel *reply); 216 virtual status_t setMetadataFilter(const Parcel& filter); 217 virtual status_t getMetadata(bool update_only, 218 bool apply_filter, 219 Parcel *reply); 220 221 sp<MediaPlayerBase> createPlayer(player_type playerType); 222 status_t setDataSource(const char *url); 223 status_t setDataSource(int fd, int64_t offset, int64_t length); 224 static void notify(void* cookie, int msg, int ext1, int ext2); 225 226 pid_t pid() const { return mPid; } 227 virtual status_t dump(int fd, const Vector<String16>& args) const; 228 229 private: 230 friend class MediaPlayerService; 231 Client( const sp<MediaPlayerService>& service, 232 pid_t pid, 233 int32_t connId, 234 const sp<IMediaPlayerClient>& client); 235 Client(); 236 virtual ~Client(); 237 238 void deletePlayer(); 239 240 sp<MediaPlayerBase> getPlayer() const { Mutex::Autolock lock(mLock); return mPlayer; } 241 242 243 244 // @param type Of the metadata to be tested. 245 // @return true if the metadata should be dropped according to 246 // the filters. 247 bool shouldDropMetadata(media::Metadata::Type type) const; 248 249 // Add a new element to the set of metadata updated. Noop if 250 // the element exists already. 251 // @param type Of the metadata to be recorded. 252 void addNewMetadataUpdate(media::Metadata::Type type); 253 254 mutable Mutex mLock; 255 sp<MediaPlayerBase> mPlayer; 256 sp<MediaPlayerService> mService; 257 sp<IMediaPlayerClient> mClient; 258 sp<AudioOutput> mAudioOutput; 259 pid_t mPid; 260 status_t mStatus; 261 bool mLoop; 262 int32_t mConnId; 263 264 // Metadata filters. 265 media::Metadata::Filter mMetadataAllow; // protected by mLock 266 media::Metadata::Filter mMetadataDrop; // protected by mLock 267 268 // Metadata updated. For each MEDIA_INFO_METADATA_UPDATE 269 // notification we try to update mMetadataUpdated which is a 270 // set: no duplicate. 271 // getMetadata clears this set. 272 media::Metadata::Filter mMetadataUpdated; // protected by mLock 273 274#if CALLBACK_ANTAGONIZER 275 Antagonizer* mAntagonizer; 276#endif 277 }; 278 279// ---------------------------------------------------------------------------- 280 281 MediaPlayerService(); 282 virtual ~MediaPlayerService(); 283 284 mutable Mutex mLock; 285 SortedVector< wp<Client> > mClients; 286 SortedVector< wp<MediaRecorderClient> > mMediaRecorderClients; 287 int32_t mNextConnId; 288 sp<IOMX> mOMX; 289}; 290 291// ---------------------------------------------------------------------------- 292 293}; // namespace android 294 295#endif // ANDROID_MEDIAPLAYERSERVICE_H 296