android


Android MediaBox framebuffer format


I'm trying to read Android framebuffer directly on two devices (both rooted).
First device is phone. And I have success with it. Android 4.2.
Framebuffer Raw has BGRA-format, and it is very simple to parse it.
framebuffer_phone dump
Second device is media box on Mali GPU and Android 6.0.
And I have problem with it. Framebuffer fomat seems compressed or something like this.
framebuffer_mediabox dump
I spend several weeks trying to decode it, but no success.
May be it is native Mali framebuffer compression feature (AFBC)?
I know, that screencap may convert dev/graphics/fb0 to png. And screencap on mediabox works perfect, but I can't decode Raw fb0 data.
Please, help me to understand compression/encode method of second file (framebuffer_mediabox dump).
I use hex-editor to open booth files and their structures is absolutely different.

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