Video Playback and Compositor Authors: jamesr@chromium.org, danakj@chromium.org The Chromium compositor has support for video playback to support offloading work to the GPU and displaying video frames while the main thread is blocked.  There are a fe…

For Developers‎ > ‎Design Documents‎ > ‎ Audio / Video Playback Interested in helping out?  Check out our bugs!  New to Chromium?  GoodFirstBug is your friend! Filing a new bug: Template  Documentation:   - HTMLAudioElement   - HTMLMediaElement   - …

Chromium站点上有个大致的框图.描写叙述了Chromium的video在各个平台 - 包含Android - 上是怎样使用硬件资源来做视频编解码加速的: 而依据Android Kitkat上的Chromium代码分析,HTML5 video播放硬件加速,终于是使用MediaCodec.java来利用本地native的硬件资源来做video视频播放加速的. Chromium的MediaPlayer或称MediaFramework, 首先是HTMLMediaElement调用一个MediaPl…

在Android上,預設的多媒體框架(multimedia framework)是OpenCORE. OpenCORE的優點是兼顧了跨平台的移植性,而且已經過多方驗證,所以相對來說較為穩定:但是其缺點是過於龐大複雜,需要耗費相當多的時間去維護.從 Android 2.0開始,Google引進了架構稍為簡潔的Stagefright,並且有逐漸取代OpenCORE的趨勢 (註1). [圖1] Stagefright在Android多媒體架構中的位置. [圖2] Stagefright所涵蓋的模組 (…

Compositor Thread Architecture <jamesr, enne, vangelis, nduca> @chromium.org Goals The main render thread is a pretty scary place. This is where HTML, CSS, Javascript and pretty much everything on the web platform runs... or originates. It routinely…

HW Video Acceleration in Chrom{e,ium}{,OS} Ami Fischman <fischman@chromium.org> Status as of 2014/06/06: Up-to-date (could use some more details) Introduction Design Implementation Details Current Status Decode Encode Results Introduction Video dec…

GPU Accelerated Compositing in Chrome Tom Wiltzius, Vangelis Kokkevis & the Chrome Graphics team updated May 2014 This code is changing due to Slimming Paint and thus there may be large changes in the future. Note also that some class names may have…

Introduction Video decode (e.g. YouTube playback) and encode (e.g. video chat applications) are some of the most complex compute operations on the modern web.  Moving these operations from software running on general-purpose CPUs to dedicated hardwar…

原创文章.转载请以链接形式注明原始出处为http://blog.csdn.net/hongbomin/article/details/40799167. 摘要:Google近期公布的Android L平台在图形渲染方面有一项重要的改进,它引入了一个专门的线程用于运行渲染工作.UI线程负责生成的显示列表(DisplayList),而新引入的渲染线程负责重放(playback)这个显示列表绘制终于的内容,为了支持Android L系统新的渲染模型,Chromium WebView在渲染模型方面也作了…

摘要:Chromium于GPU多个流程架构的同意GPUclient这将是这次访问的同时GPU维修,和GPUclient这之间可能存在数据依赖性.因此必须提供一个同步机制,以确保GPU订购业务.本文讨论了下一个多进程架构GPUclient之间的同步,而同步点(SyncPoint). GPU进程架构等基本概念 我们知道,Chromium是一个多进程架构的软件系统.出于安全和稳定性方面的考虑,Chromium有个专门的进程(或者线程)和GPU设备进行交互,运行GL操作,也就是说,不论什么一条GL命令都…