MediaPlayerService.h revision 7b5eb023f8d87cca6d830ae6c11c6aadbe02aca8
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.h> 22#include <utils/KeyedVector.h> 23#include <ui/SurfaceComposerClient.h> 24 25#include <media/IMediaPlayerService.h> 26#include <media/MediaPlayerInterface.h> 27 28namespace android { 29 30class IMediaRecorder; 31class IMediaMetadataRetriever; 32 33#define CALLBACK_ANTAGONIZER 0 34#if CALLBACK_ANTAGONIZER 35class Antagonizer { 36public: 37 Antagonizer(notify_callback_f cb, void* client); 38 void start() { mActive = true; } 39 void stop() { mActive = false; } 40 void kill(); 41private: 42 static const int interval; 43 Antagonizer(); 44 static int callbackThread(void* cookie); 45 Mutex mLock; 46 Condition mCondition; 47 bool mExit; 48 bool mActive; 49 void* mClient; 50 notify_callback_f mCb; 51}; 52#endif 53 54class MediaPlayerService : public BnMediaPlayerService 55{ 56 class Client; 57 58 class AudioOutput : public MediaPlayerBase::AudioSink 59 { 60 public: 61 AudioOutput(); 62 virtual ~AudioOutput(); 63 64 virtual bool ready() const { return mTrack != NULL; } 65 virtual bool realtime() const { return true; } 66 virtual ssize_t bufferSize() const; 67 virtual ssize_t frameCount() const; 68 virtual ssize_t channelCount() const; 69 virtual ssize_t frameSize() const; 70 virtual uint32_t latency() const; 71 virtual float msecsPerFrame() const; 72 virtual status_t open(uint32_t sampleRate, int channelCount, int format, int bufferCount=4); 73 virtual void start(); 74 virtual ssize_t write(const void* buffer, size_t size); 75 virtual void stop(); 76 virtual void flush(); 77 virtual void pause(); 78 virtual void close(); 79 void setAudioStreamType(int streamType) { mStreamType = streamType; } 80 void setVolume(float left, float right); 81 virtual status_t dump(int fd, const Vector<String16>& args) const; 82 83 static bool isOnEmulator(); 84 static int getMinBufferCount(); 85 private: 86 static void setMinBufferCount(); 87 88 AudioTrack* mTrack; 89 int mStreamType; 90 float mLeftVolume; 91 float mRightVolume; 92 float mMsecsPerFrame; 93 uint32_t mLatency; 94 95 // TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround 96 static const uint32_t kAudioVideoDelayMs; 97 static bool mIsOnEmulator; 98 static int mMinBufferCount; // 12 for emulator; otherwise 4 99 100 }; 101 102 class AudioCache : public MediaPlayerBase::AudioSink 103 { 104 public: 105 AudioCache(const char* name); 106 virtual ~AudioCache() {} 107 108 virtual bool ready() const { return (mChannelCount > 0) && (mHeap->getHeapID() > 0); } 109 virtual bool realtime() const { return false; } 110 virtual ssize_t bufferSize() const { return frameSize() * mFrameCount; } 111 virtual ssize_t frameCount() const { return mFrameCount; } 112 virtual ssize_t channelCount() const { return (ssize_t)mChannelCount; } 113 virtual ssize_t frameSize() const { return ssize_t(mChannelCount * ((mFormat == AudioSystem::PCM_16_BIT)?sizeof(int16_t):sizeof(u_int8_t))); } 114 virtual uint32_t latency() const; 115 virtual float msecsPerFrame() const; 116 virtual status_t open(uint32_t sampleRate, int channelCount, int format, int bufferCount=1); 117 virtual void start() {} 118 virtual ssize_t write(const void* buffer, size_t size); 119 virtual void stop() {} 120 virtual void flush() {} 121 virtual void pause() {} 122 virtual void close() {} 123 void setAudioStreamType(int streamType) {} 124 void setVolume(float left, float right) {} 125 uint32_t sampleRate() const { return mSampleRate; } 126 uint32_t format() const { return (uint32_t)mFormat; } 127 size_t size() const { return mSize; } 128 status_t wait(); 129 130 sp<IMemoryHeap> getHeap() const { return mHeap; } 131 132 static void notify(void* cookie, int msg, int ext1, int ext2); 133 virtual status_t dump(int fd, const Vector<String16>& args) const; 134 135 private: 136 AudioCache(); 137 138 Mutex mLock; 139 Condition mSignal; 140 sp<MemoryHeapBase> mHeap; 141 float mMsecsPerFrame; 142 uint16_t mChannelCount; 143 uint16_t mFormat; 144 ssize_t mFrameCount; 145 uint32_t mSampleRate; 146 uint32_t mSize; 147 int mError; 148 bool mCommandComplete; 149 }; 150 151public: 152 static void instantiate(); 153 154 // IMediaPlayerService interface 155 virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid); 156 virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid); 157 158 // House keeping for media player clients 159 virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url); 160 virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length); 161 virtual sp<IMemory> decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat); 162 virtual sp<IMemory> decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat); 163 164 virtual status_t dump(int fd, const Vector<String16>& args); 165 166 void removeClient(wp<Client> client); 167 168private: 169 170 class Client : public BnMediaPlayer { 171 172 // IMediaPlayer interface 173 virtual void disconnect(); 174 virtual status_t setVideoSurface(const sp<ISurface>& surface); 175 virtual status_t prepareAsync(); 176 virtual status_t start(); 177 virtual status_t stop(); 178 virtual status_t pause(); 179 virtual status_t isPlaying(bool* state); 180 virtual status_t seekTo(int msec); 181 virtual status_t getCurrentPosition(int* msec); 182 virtual status_t getDuration(int* msec); 183 virtual status_t reset(); 184 virtual status_t setAudioStreamType(int type); 185 virtual status_t setLooping(int loop); 186 virtual status_t setVolume(float leftVolume, float rightVolume); 187 188 sp<MediaPlayerBase> createPlayer(player_type playerType); 189 status_t setDataSource(const char *url); 190 status_t setDataSource(int fd, int64_t offset, int64_t length); 191 static void notify(void* cookie, int msg, int ext1, int ext2); 192 193 pid_t pid() const { return mPid; } 194 virtual status_t dump(int fd, const Vector<String16>& args) const; 195 196 private: 197 friend class MediaPlayerService; 198 Client( const sp<MediaPlayerService>& service, 199 pid_t pid, 200 int32_t connId, 201 const sp<IMediaPlayerClient>& client); 202 Client(); 203 virtual ~Client(); 204 205 void deletePlayer(); 206 207 sp<MediaPlayerBase> getPlayer() const { Mutex::Autolock lock(mLock); return mPlayer; } 208 209 mutable Mutex mLock; 210 sp<MediaPlayerBase> mPlayer; 211 sp<MediaPlayerService> mService; 212 sp<IMediaPlayerClient> mClient; 213 sp<AudioOutput> mAudioOutput; 214 pid_t mPid; 215 status_t mStatus; 216 bool mLoop; 217 int32_t mConnId; 218#if CALLBACK_ANTAGONIZER 219 Antagonizer* mAntagonizer; 220#endif 221 }; 222 223// ---------------------------------------------------------------------------- 224 225 MediaPlayerService(); 226 virtual ~MediaPlayerService(); 227 228 mutable Mutex mLock; 229 SortedVector< wp<Client> > mClients; 230 int32_t mNextConnId; 231}; 232 233// ---------------------------------------------------------------------------- 234 235}; // namespace android 236 237#endif // ANDROID_MEDIAPLAYERSERVICE_H 238 239