从HDMI捕获音频帧IN端口 [英] Capturing audio frames from HDMI IN port

问题描述

我有一个根深蒂固的GoogleTV海信拥有HDMI IN和OUT端口。

I have a rooted HiSense GoogleTV which has HDMI IN and OUT ports.

我想要做的就是记录约10秒从HDMI IN音频（从机顶盒）的。我是新来这一点，所以请多多包涵。

What I want to do is to record about 10 secs of the audio from the HDMI IN (from the set-top box). I am new to this, so please bear with me.

1. 这是可能做到这一点植根设备上？

1. Is this possible to do this on a rooted device?

请问HDMI数据获取HDMI IN解密后（由于HDCP）和重新加密之前，通过HDMI引出了呢？

Does the HDMI data get decrypted (due to HDCP) after the HDMI IN and re-encrypted before it is routed out via HDMI out?

如果我是尽量争取在常规的Linux机器的音频帧，应该怎么做呢？我应该考虑哪些组件？我无法找到一个描述低层次的体系结构和细节上的HDMI IN信号如何被发送到HDMI OUT的任何文件。

If I were to try to capture the audio frames on a regular Linux box, how should I go about it? What components should I look into? I cannot find any documentation that describes the low level architecture and details on how the HDMI IN signal gets routed to HDMI OUT.

您可以请指向Android框架code，实际上确实从HDMI此路由在到了呢？基本上，要理解的从HDMI在转印到OUT期间所发生的音频信号的流动。

Can you please point to the Android framework code that actually does this routing from HDMI In to OUT? Basically, want to understand the flow of what happens to the audio signal during the transfer from the HDMI IN to the OUT.

我不知道如果我的问题是有意义的，但我希望你能给我我应该在哪里开始一些指针。

I am not sure if my questions make sense, but I hope you can give me some pointers on where I should start.

推荐答案

简短的回答：不可能的。直通完全从机器人通过可信视频路径的SOC隔离。你需要一个认证的SOC供应商得到信号附近的任何地方。

Short answer: Not possible. The pass-through is completely isolated from android via the Trusted Video Path SOCs. You need to be a certified SOC provider to get anywhere near the signal.

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