#### 本章主要内容 - 详细分析AudioTrack。 - 详细分析AudioFlinger。 - 详细分析AudioPolicyService。 #### 本章涉及的源代码文件名及位置 下面是本章分析的源码文件名及其位置。 - AudioTrack.java `framework/base/media/java/com/android/media/AudioTrack.java` - android_media_track.cpp `framework/base/core/jni/android_media_track.cpp` - MemoryHeapBase `framework/base/libs/binder/MemoryHeapBase.cpp` - MemoryBase.h `framework/base/include/binder/MemoryBase.h` - AudioTrack.cpp `framework/base/libmedia/AudioTrack.cpp` - audio_track_cblk_t声明 `framework/base/include/private/media/AudioTrackShared.h` - audio_track_cblk_t定义 `framework/base/media/libmedia/AudioTrack.cpp` - Main_MediaServer.cpp `framework/base/media/mediaserver/Main_MediaServer.cpp` - AudioFlinger.cpp `framework/base/libs/audioFlinger/AudioFlinger.cpp` - AudioHardwareInterface.h `hardware/libhardware_legacy/include/hardware_legacy/AudioHardwareInterface.h` - AudioMixer.cpp `framework/base/libs/audioflinger/AudioMixer.cpp` - AudioSystem.h `framework/base/include/media/AudioSystem.h` - AudioSystem.cpp `framework/base/media/libmedia/AudioSystem.cpp` - AudioPolicyInterface.h `hardware/libhardware_legacy/include/hardware_legacy` - AudioPolicyManagerBase.cpp `framework/base/libs/audioflinger/AudioPolicyManagerBase.cpp` - AudioService.java `framework/base/media/java/com/android/media/AudioService.java` - Android_media_AudioSystem.cpp `framework/base/core/Jni/Android_media_AudioSystem.cpp`