【转+翻译】An overview of Stagefright player

There is a new playback engine implemented by Google comes with Android 2.0 (i.e, Stagefright), which seems to be quite simple and straightforward compared with the OpenCORE solution.
伴随着Android2.0而来的是Google实现的一种新的播放引擎（例如：Stagefright）。比起OpenCORE的解决方案来，它似乎比较简单和直接。

MediaExtractor is responsible for retrieving track data and the corresponding meta data from the underlying file system or http stream;
MediaExtractor负责检索从底层文件系统或http流上来的音轨数据（track data）和相应的元数据；

Leveraging OMX for decoding: there are two OMX plugins currently, adapting to PV's software codec and vendor's hardware implementation respectively. And there is a local implementation of software codecs which encapsulates PV's decoder APIs directly;
用OMX来解码：目前有两个OMX插件，分别用来适配PV的软件codec和vendor的硬件codec。并且有一个本地软件codec的实现，他直接封装了PV的解码API；

AudioPlayer is responsible for rendering audio, it also provides the timebase for timing and A/V synchronization whenever audio track is present;
AudioPlayer负责播放音频，并且，只要有音轨（audio track）存在，它就为计时和AV同步来提供时基（timebase）；

Depending on which codec is picked, a local or remote render will be created for video rendering; and system clock is used as the timebase for video only playback;
播放视频时，一个本地的或远程的render将会被创建，这取决于我们选取哪种codec。与此同时，系统时钟会被用来作为视频播放的时基（timebase）；

AwesomePlayer works as the engine to coordinate the above modules, and is finally connected into android media framework through the adapter of StagefrightPlayer.
AwesomePlayer作为引擎来协调以上模块，并且最终通过StagefrightPlayer这个适配器来连接到Android的媒体框架
 



 
 
转自：（需要翻墙）
http://freepine.blogspot.com/2010/01/overview-of-stagefrighter-player.html