MediaPlayerService.h revision 1d187f1a86855f5f0694d7ec30efc9833bf7c589
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 <ui/SurfaceComposerClient.h> 27 28#include <media/IMediaPlayerService.h> 29#include <media/MediaPlayerInterface.h> 30 31namespace android { 32 33class IMediaRecorder; 34class IMediaMetadataRetriever; 35 36#define CALLBACK_ANTAGONIZER 0 37#if CALLBACK_ANTAGONIZER 38class Antagonizer { 39public: 40 Antagonizer(notify_callback_f cb, void* client); 41 void start() { mActive = true; } 42 void stop() { mActive = false; } 43 void kill(); 44private: 45 static const int interval; 46 Antagonizer(); 47 static int callbackThread(void* cookie); 48 Mutex mLock; 49 Condition mCondition; 50 bool mExit; 51 bool mActive; 52 void* mClient; 53 notify_callback_f mCb; 54}; 55#endif 56 57class MediaPlayerService : public BnMediaPlayerService 58{ 59 class Client; 60 61 class AudioOutput : public MediaPlayerBase::AudioSink 62 { 63 public: 64 AudioOutput(); 65 virtual ~AudioOutput(); 66 67 virtual bool ready() const { return mTrack != NULL; } 68 virtual bool realtime() const { return true; } 69 virtual ssize_t bufferSize() const; 70 virtual ssize_t frameCount() const; 71 virtual ssize_t channelCount() const; 72 virtual ssize_t frameSize() const; 73 virtual uint32_t latency() const; 74 virtual float msecsPerFrame() const; 75 virtual status_t open(uint32_t sampleRate, int channelCount, int format, int bufferCount=4); 76 virtual void start(); 77 virtual ssize_t write(const void* buffer, size_t size); 78 virtual void stop(); 79 virtual void flush(); 80 virtual void pause(); 81 virtual void close(); 82 void setAudioStreamType(int streamType) { mStreamType = streamType; } 83 void setVolume(float left, float right); 84 virtual status_t dump(int fd, const Vector<String16>& args) const; 85 86 static bool isOnEmulator(); 87 static int getMinBufferCount(); 88 private: 89 static void setMinBufferCount(); 90 91 AudioTrack* mTrack; 92 int mStreamType; 93 float mLeftVolume; 94 float mRightVolume; 95 float mMsecsPerFrame; 96 uint32_t mLatency; 97 98 // TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround 99 static const uint32_t kAudioVideoDelayMs; 100 static bool mIsOnEmulator; 101 static int mMinBufferCount; // 12 for emulator; otherwise 4 102 103 }; 104 105 class AudioCache : public MediaPlayerBase::AudioSink 106 { 107 public: 108 AudioCache(const char* name); 109 virtual ~AudioCache() {} 110 111 virtual bool ready() const { return (mChannelCount > 0) && (mHeap->getHeapID() > 0); } 112 virtual bool realtime() const { return false; } 113 virtual ssize_t bufferSize() const { return frameSize() * mFrameCount; } 114 virtual ssize_t frameCount() const { return mFrameCount; } 115 virtual ssize_t channelCount() const { return (ssize_t)mChannelCount; } 116 virtual ssize_t frameSize() const { return ssize_t(mChannelCount * ((mFormat == AudioSystem::PCM_16_BIT)?sizeof(int16_t):sizeof(u_int8_t))); } 117 virtual uint32_t latency() const; 118 virtual float msecsPerFrame() const; 119 virtual status_t open(uint32_t sampleRate, int channelCount, int format, int bufferCount=1); 120 virtual void start() {} 121 virtual ssize_t write(const void* buffer, size_t size); 122 virtual void stop() {} 123 virtual void flush() {} 124 virtual void pause() {} 125 virtual void close() {} 126 void setAudioStreamType(int streamType) {} 127 void setVolume(float left, float right) {} 128 uint32_t sampleRate() const { return mSampleRate; } 129 uint32_t format() const { return (uint32_t)mFormat; } 130 size_t size() const { return mSize; } 131 status_t wait(); 132 133 sp<IMemoryHeap> getHeap() const { return mHeap; } 134 135 static void notify(void* cookie, int msg, int ext1, int ext2); 136 virtual status_t dump(int fd, const Vector<String16>& args) const; 137 138 private: 139 AudioCache(); 140 141 Mutex mLock; 142 Condition mSignal; 143 sp<MemoryHeapBase> mHeap; 144 float mMsecsPerFrame; 145 uint16_t mChannelCount; 146 uint16_t mFormat; 147 ssize_t mFrameCount; 148 uint32_t mSampleRate; 149 uint32_t mSize; 150 int mError; 151 bool mCommandComplete; 152 }; 153 154public: 155 static void instantiate(); 156 157 // IMediaPlayerService interface 158 virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid); 159 virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid); 160 161 // House keeping for media player clients 162 virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url); 163 virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length); 164 virtual sp<IMemory> decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat); 165 virtual sp<IMemory> decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat); 166 167 virtual status_t dump(int fd, const Vector<String16>& args); 168 169 void removeClient(wp<Client> client); 170 171private: 172 173 class Client : public BnMediaPlayer { 174 175 // IMediaPlayer interface 176 virtual void disconnect(); 177 virtual status_t setVideoSurface(const sp<ISurface>& surface); 178 virtual status_t prepareAsync(); 179 virtual status_t start(); 180 virtual status_t stop(); 181 virtual status_t pause(); 182 virtual status_t isPlaying(bool* state); 183 virtual status_t seekTo(int msec); 184 virtual status_t getCurrentPosition(int* msec); 185 virtual status_t getDuration(int* msec); 186 virtual status_t reset(); 187 virtual status_t setAudioStreamType(int type); 188 virtual status_t setLooping(int loop); 189 virtual status_t setVolume(float leftVolume, float rightVolume); 190 virtual status_t invoke(const Parcel& request, Parcel *reply); 191 192 sp<MediaPlayerBase> createPlayer(player_type playerType); 193 status_t setDataSource(const char *url); 194 status_t setDataSource(int fd, int64_t offset, int64_t length); 195 static void notify(void* cookie, int msg, int ext1, int ext2); 196 197 pid_t pid() const { return mPid; } 198 virtual status_t dump(int fd, const Vector<String16>& args) const; 199 200 private: 201 friend class MediaPlayerService; 202 Client( const sp<MediaPlayerService>& service, 203 pid_t pid, 204 int32_t connId, 205 const sp<IMediaPlayerClient>& client); 206 Client(); 207 virtual ~Client(); 208 209 void deletePlayer(); 210 211 sp<MediaPlayerBase> getPlayer() const { Mutex::Autolock lock(mLock); return mPlayer; } 212 213 mutable Mutex mLock; 214 sp<MediaPlayerBase> mPlayer; 215 sp<MediaPlayerService> mService; 216 sp<IMediaPlayerClient> mClient; 217 sp<AudioOutput> mAudioOutput; 218 pid_t mPid; 219 status_t mStatus; 220 bool mLoop; 221 int32_t mConnId; 222#if CALLBACK_ANTAGONIZER 223 Antagonizer* mAntagonizer; 224#endif 225 }; 226 227// ---------------------------------------------------------------------------- 228 229 MediaPlayerService(); 230 virtual ~MediaPlayerService(); 231 232 mutable Mutex mLock; 233 SortedVector< wp<Client> > mClients; 234 int32_t mNextConnId; 235}; 236 237// ---------------------------------------------------------------------------- 238 239}; // namespace android 240 241#endif // ANDROID_MEDIAPLAYERSERVICE_H 242