[theora-dev] YUV Format

[illiminable]

I posted this the other day... but it didn't get delivered...

-------------------------------------------------------------------
I'm getting stuck into a theora decoder for directshow... i was just wondering if someone could give me some info.

What output format does theora use ?

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwmt/html/YUVFormats.asp

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/directx9_c/directx/htm/yuvvideosubtypes.asp

Heres the list i haev to work from... could someone tell me which of these it is ?

Best i can tell it's YUV12 ?

So can someone confirm the following... each component is 8 bits.

I have an array of y data.

and it is an array [0..y_height] of arrays [0..y_width]

ie... an array of horizontal lines ?

And the uv data is an array [0..uv_height] of arrays [0..uv_width*2]

where data goes
UVUVUVUVUVUV........ (width uv_width*2 or uv_width lots of UV)
UVUV.....
.
.
.
(uv_height lines)

Is this correct ? Or is the actual byte width of the UV lines actually uv_width ? ie one UV component is shared over the y components.

So if this is the yuv data from my file
Pack No  : 11
Y Width  : 352
Y Height : 288
Y Stride : -384
UV Width : 176
UV Height : 144
UV Stride : -192 

the memory allocated to the y buffer = 352 * 288
the memory allocated to the uv buffer = 176 * 2 * 144 or is it 176 * 144 ????

Thanks !

Zen.

<p><p><p>--- >8 ----
List archives:  http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To unsubscribe from this list, send a message to 'theora-dev-request at xiph.org'
containing only the word 'unsubscribe' in the body.  No subject is needed.
Unsubscribe messages sent to the list will be ignored/filtered.