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谷歌官方关于systrace 的介绍.Analyzing UI Performance with Systrace In this document Overview Generating a Trace Analyzing a Trace Inspecting Frames Investigating Alerts Tracing Application Code See also

我一直对Looper和loopthread 感兴趣,看到audio中也有looper的身影. 不觉得就写点什么.

// This section re-defines new output device constants from AudioSystem, because the AudioSystem // class is not used by other parts of the framework, which instead use definitions and methods

/** * The implementation of the volume manager service. *  * This implementation focuses on delivering a responsive UI. Most methods are * asynchronous to external calls. For example, the task

耳机接线图2008-12-05 23:09有一根铜色的线是共用的接地线，耳机和话筒用同一根地线。一般红色和深绿色的是耳机的两个声道，另外的一根就是耳麦话筒的线 ，话筒只有两根接点.耳机麦克风一般有两个接口的，绿色的接声卡上的音频

http://www.cnblogs.com/mcodec/articles/1780598.html感谢该博客的主人！H264解码器源码，移植ffmpeg中的H264解码部分到Android，深度删减优化，在模拟器(320x480)中验证通过

bool AudioPolicyService::isStreamActiveRemotely(audio_stream_type_t stream, uint32_t inPastMs) const{ if (uint32_t(stream) >= AUDIO_STREAM_PUBLIC_CNT) { return false; } if (mAudio

从AudioFlinger 开始看起. AudioFlinger::openOutput   方法 调用  thread = openOutput_l  ,在这个里面,// ----------------------------------------------------------------------------sp AudioFlinger::openOutput_l

frameworks/base/core/java/android/hardware/ICamera.aidl/** @hide */interface ICamera{ /** * Keep up-to-date with frameworks/av/include/camera/ICamera.h */ void disconnect();}icame