[Theora-dev] frame_height, height, y_height etc...

[illiminable]

Actually... let me try again... this is my current understanding...

 //mTheoraInfo values
 //==================
 //width, height     - /16 up rounded values, size of the outer frame
 //frame_width, frame_height  - size of the inner picture region
 //offset_x      - Distance at bottom left from outer frame to inner picture 
<= width - frame_width
 //offset_y      - Distance at bottom left from outer frame to inner picture 
<= height - frame_height

 //mYUV values
 //=============================
 //y_stride      - Equal to the /16 up rounded wdith values
 //y_width      - Equal to the /16 up rounded wdith values
 //uv_stride      - Equal to *half* the /16 up rounded width values
 //uv_width      - Equal to *half* the /16 up rounded wdith values
 //y_height      - Equal to the /16 up rounded height value
 //uv_height      - Equal to *half* the /16 up rounded height value
 //y        - Buffer of size y_stride*y_height (/16 up rounded values)
 //u,v       - Buffers each *quarter* the size of the y buffer (/16 up 
rounded values)


----- Original Message ----- 
From: "illiminable" <ogg at illiminable.com>
To: <theora-dev at xiph.org>
Sent: Monday, December 20, 2004 8:00 PM
Subject: [Theora-dev] frame_height, height, y_height etc...


> I'd previously been working on the assumption that the frame_height was 
> the height of the inner picture region... and height was the height of the 
> outer frame.
>
> Then upon readnig the spec... where it calls the outer part the frame and 
> the inner part the picture region... i assumed i'd made a mistake and that 
> frame_width is actually >= width in the theorainfo structure... ie 
> frame_width is the size of the frame and width is the size of the picture 
> inside the frame.
>
> So now i'm completely confused.
>
> Could someone please clarify if the following is correct...
>
> theorainfo.frame_width  = width of the inner picture region
> theorainfo.width = width of the outer frame
> yuvbuffer.y_stride = theorainfo.width = width of the outer frame
> yuvbuffer.y_width = theorainfo.frame_width = width of the inner picture 
> region
>
> ???
>
>
> Cheers,
>
> Zen.
>
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