Adobe AIR for TV入门指南

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"GettingStartedWithAdobeAIRForTV.pdf 是一份介绍如何使用Adobe AIR开发电视应用的用户指南。这份文档由Adobe Systems Incorporated于2010年发布，旨在为开发者提供在电视平台上创建交互式应用程序的基础知识。" 这篇文档详细介绍了Adobe AIR for TV的入门知识，Adobe AIR是一个跨平台的运行环境，允许开发者使用HTML、CSS和JavaScript或ActionScript (基于Flash) 开发桌面和移动应用，而这份指南则扩展了这一功能，将应用开发拓展到电视设备上。文档首先可能涵盖了安装和设置Adobe AIR开发环境，包括在电视设备上安装AIR运行时环境，以及开发者需要的开发工具，如Adobe Flash Builder或Flex SDK。此外，它可能指导开发者如何创建针对电视界面设计的用户界面，考虑到电视屏幕的特性，如更大的屏幕尺寸、遥控器输入和更远的观看距离。接着，文档可能深入讨论了针对电视优化的交互设计，例如使用大按钮和清晰的导航结构，以适应电视遥控器的操作。同时，可能会讲解如何利用Adobe AIR API来实现与电视硬件的互动，比如调用电视的媒体播放功能或者使用红外传感器。此外，文档可能会涉及测试和调试过程，如何在模拟器上预览应用，以及在真实电视设备上的部署策略。开发者可能会学到如何打包和签名应用程序，以确保它们能在电视设备上安全地运行。文档强调其受版权保护，仅供非商业用途的信息参考，并且遵循Creative Commons Attribution Non-Commercial 3.0 License条款。这意味着使用者可以复制、分发和传播该文档，但必须给予Adobe适当的归属，并通知任何使用者，该文档的使用受到这些条款的约束。 "GettingStartedWithAdobeAIRForTV.pdf"是电视应用开发者的一份宝贵资源，它提供了一个从零开始学习如何利用Adobe AIR技术为电视平台构建应用程序的全面教程。通过遵循这份指南，开发者能够掌握在电视上创建丰富、互动用户体验的技能。

GETTING STARTED WITH AIR FOR TV

Introducing Adobe AIR 2.5 for TV

Last updated 12/7/2010

The static, minimalist user interfaces that are the current standard for most home-entertainment devices and

programming sources are limited compared to the dynamic, feature-rich user experiences that AIR for TV

supports. AIR for TV uses a platform’s graphical hardware accelerators to provide a high-performance graphical

user interface for a 10-foot user experience. Such user interfaces are designed for a large television screen with user

input from a remote control device.

AIR for TV platform development

AIR for TV requires minimal effort to recompile on any Linux distribution that is based on version 2.6.x of the Linux

kernel. AIR for TV can be recompiled for most target platforms in a single working day. This effort does not require

extensive porting of C++ code or knowledge of AIR.

AIR for TV provides a streamlined C++ Application Programming Interface (API) that does not require knowledge

of AIR details. You can develop and build an AIR for TV platform for a target Linux operating system entirely in a

Linux environment. You can also use the C++ debugging tools in Microsoft Visual Studio 2008 Professional on a

Win32 environment to assist your development efforts.

The highly modular design of AIR for TV facilitates the replacement of any module with a minimum of effort. To use

hardware capabilities that are unique to your target platform, you replace a module provided by AIR for TV with one

that you create. For example, AIR for TV provides a module that processes On2 streaming video in software. You can

replace this module with one you provide that accesses your platform’s hardware accelerators for processing streaming

video.

Note: Sometimes replacing a provided module with a platform-specific module is a requirement to support certain

features.

AIR for TV capabilities

AIR for TV is AIR 2.5, optimized for hardware and software architectures of digital home electronics. AIR applications

that run on AIR for TV use the AIR application profile

TV or extendedTV.

AIR for TV also provides the following overall capabilities:

• AIR application content appears in an area of the screen known as the Stage.

• AIR for TV can run AIR applications installed on the local file system. The root SWF file (the starting SWF file) can

load additional SWF content from file://URLs or from http://URLs. You can also enable AIR for TV to allow SWF

content to load additional SWF files from https://URLs.

Note: AIR for TV supports only SWF content in AIR applications. The applications cannot contain HTML, JavaScript,

CSS, Ajax, or PDF content.

• You can create your own platform-specific driver that enables your AIR for TV platform to interact with hardware-

based functionality of your target platform. Typically, you create drivers to replace functionality that AIR for TV

provides in software with a hardware-based equivalent. For example, to use hardware accelerators for

decompressing and presenting video, you create a driver. The driver enables your AIR for TV platform to interact

with specific video-processing hardware. Support of some features, such as H.264 support and digital rights

management, require a platform-specific driver.

• AIR for TV supports H.264 by interacting with a platform-specific driver that uses the device hardware’s H.264

support. Typically, the device provides full 1080p HD video.

GETTING STARTED WITH AIR FOR TV

Introducing Adobe AIR 2.5 for TV

Last updated 12/7/2010

• AIR for TV supports SWF-embedded video, and video content delivered with the file:// or http:// protocols.

It also supports video content from Adobe Flash Media Server using the

rtmp://, rtmpt://, and rtmpe://

protocols.

• AIR for TV is tailored for the system-on-a-chip (SOC) that controls an HD TV. AIR for TV models its graphics and

video planes in a way that is a natural fit with HD video. AIR for TV supports the Sorenson, On2 VP6, and H.264

video codecs. It supports vector-based graphics, but AIR application developers are encouraged to use bitmap

graphics whenever possible for best performance on lower-end processors.

• For graphics rendering operations, AIR for TV supports 2-D hardware graphics engines that perform blit and fill

graphics operations.

Note: As a prerelease feature, AIR for TV also supports hardware acceleration of OpenGL ES 2.0 interfaces. That is,

you can create a graphics driver for your platform that uses OpenGL ES 2.0. However, use such a graphics driver only

for learning and development. Use it for a shippable product only with a future release of AIR for TV that fully

supports the feature.

• AIR for TV supports digital rights management using Flash Access 2.0 if a platform-specific driver for this purpose

is provided.

• You can develop and deploy ActionScript extensions for AIR for TV devices. These extensions allow AIR for TV

applications to use ActionScript to access functionality or code specific to a device.

• When AIR for TV runs an AIR application, the application runs in the AIR application sandbox. Like any AIR

application, files installed as part of the application load into the application sandbox. Any other files loaded by the

application have security restrictions corresponding to the restrictions specified by the regular Flash Player security

model. For more information, see

The AIR application sandbox in the ActionScript 3.0 Developer’s Guide.

However, AIR for TV restricts application access to the file system beyond the normal application sandbox

restrictions. These restrictions protect the target device’s file system. For more information, see Filesystem usage in

Optimizing and Integrating Adobe AIR for TV (PDF).

System requirements

The system that runs your product that uses AIR for TV is the target system. For example, a target system is the Linux-

based system-on-a-chip that controls a digital TV. The system you use to write C++ code and build an executable file

is the development system.

Target system requirements

The consumer electronics device that runs your AIR for TV platform must meet these minimum hardware

requirements:

Component Minimum Requirement

Processor 600 mHz or equivalent dedicated to Flash operation

Screen 1280 x 720 ARGB8888 graphics plane with minimum 30-fps hardware compositing

DirectFB or equivalent windowing system

Graphics 2-D hardware graphics engine that performs blit and fill graphics operations.

Memory 128-MB RAM that makes 32 MB available to each application instance

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