声道切换演示程序(新增波形显示功能源码) 主要演示了调用系统接口IMpegAudioDecoder来切换声道和利用SampleGrabber取音频缓冲数据来复制声道达到声道切换。 此种方式切换声道可以支持各种媒体格式，只要媒体文件有两个声道就行了，还有利用SampleGrabber还可以取得视频数据，即SampleGrabber可以取得任何的类型的Sample。 利用本演示还可以实现音效（EQ）和波形显示的功能，只要对音频数据进行相关的处理就行了。 -chan

rtbuf.c is an implementation of a buffering scheme using the POSIX realtime features. Its aim is to provide smooth playback of MPEG audio streams even on a very heavily loaded machine. It uses many advanced features of the operating system: -

This implementation creates three processes: - The command line parse/control process. It runs continuously as root. - The MPEG decode/playback process. It revokes root rights as soon as it has enabled the realtime features, to minimize the ri