基于Webkit的移动浏览器对终端硬件设备调用的增强

发布时间：2018-11-11 10:17

【摘要】：随着云计算与移动互联网技术快速发展,Web应用也迎来了快速增长。不同于移动操作系统的原生应用(Native Applications),Web应用拥有跨平台的良好特性。而移动浏览器,是“云端”面向移动用户的重要平台和入口,是进入Web应用时代的重要一环。近年来,移动Web应用与原生应用的差距主要体现在硬件的调用能力上。由于原生应用更加靠近移动操作系统底层,在开发和运行过程中有更多的调用终端硬件设备的方式。为了使Web应用在功能和性能上有着对应的增强,一些企业和组织提出了一些开源的移动浏览器架构,通过底层系统层面的一些实现,使移动浏览器调用硬件设备的能力得以增强。基于以上背景,本文基于当下流行的Webkit移动浏览器内核,提出了三种调用终端硬件设备的增强实现。第一种实现是对WebKit内核单点组件的增强。单点组件是由唯一硬件设备支持的调用方式。本文借鉴了 Android移动操作系统硬件驱动的实现,提出了组件设计原则、实现方案,实现了 Webkit内核中三种增强方法。同时在实验验证过程中,完成了与原生应用在关键参数上的比较。第二种实现是WebKit内核复合组件性能的一种增强。复合组件是指一个功能组件需要多个硬件设备配合使用,这是在单点组件增强的基础上,引入了硬件之间调度配合的工作。本文提出了复合组件的设计原则、实现方案。实现中,针对两种主要的硬件设备操作——摄像头视频采集与显示屏渲染画面,提出一种联合优化方案,利用动态缓存策略,实现了复合组件的性能的增强。第三种实现是Webkit内核平台应用接口的性能的一种增强。这里的平台应用接口是相对于组件更加偏应用的概念,可以控制组件之间的操作达到性能优化之类的效果。本文以WebRTC为场景用例,研究了信息处理和信息传输之间的瓶颈关系。并实现了平台应用接口完成对WebRTC过程中自适应调整。经过实验测试和结果对比,本文中提出的基于Webkit的移动浏览器对终端硬件设备调用的三种实现方式,相较于原有的移动浏览器内核功能上有一定的增强。为Web应用的多样性和性能提供了更好的支撑。
[Abstract]:With the rapid development of cloud computing and mobile Internet technology, Web applications have also ushered in a rapid growth. Native (Native Applications), Web applications, unlike mobile operating systems, have good cross-platform features. Mobile browser is an important platform and entry for mobile users in the cloud, and it is an important part of Web application era. In recent years, the gap between mobile Web applications and native applications is mainly reflected in the ability of hardware transfer. Since native applications are closer to the bottom of the mobile operating system, there are more ways to call terminal hardware devices during development and operation. In order to enhance the function and performance of Web application, some enterprises and organizations put forward some open source mobile browser architecture, which can be implemented at the bottom system level. Enhances the ability of mobile browsers to invoke hardware devices. Based on the above background, this paper proposes three enhanced implementation of calling terminal hardware devices based on the popular Webkit mobile browser kernel. The first implementation is an enhancement of the single-point component of the WebKit kernel. A single-point component is a invocation supported by a unique hardware device. This paper draws lessons from the implementation of hardware driver of Android mobile operating system, puts forward the principle of component design and implementation scheme, and realizes three kinds of enhancement methods in Webkit kernel. At the same time, in the process of experimental verification, the comparison of key parameters with native application is completed. The second implementation is an enhancement of the performance of WebKit kernel composite components. Composite component is that a functional component needs more than one hardware device to cooperate with each other, which is based on the enhancement of single point component, and introduces the work of scheduling and coordination between hardware. In this paper, the design principle and implementation scheme of composite components are put forward. In the implementation, a joint optimization scheme is proposed for two main hardware devices, camera video capture and display screen rendering, and the performance of composite components is enhanced by using dynamic buffer strategy. The third implementation is an enhancement of the performance of the Webkit kernel platform application interface. The platform application interface here is a more application-oriented concept than the component, which can control the operation between components to achieve the effect of performance optimization. Taking WebRTC as a scenario case, the bottleneck relationship between information processing and information transmission is studied in this paper. The platform application interface is implemented to adjust WebRTC adaptively. After the experimental test and the result comparison, the three implementation methods of the mobile browser based on Webkit for calling the terminal hardware device are proposed in this paper, compared with the original mobile browser kernel, the function of the mobile browser kernel is enhanced to a certain extent. It provides a better support for the diversity and performance of Web applications.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP393.092

【相似文献】