[FFmpeg-devel] [PATCH 03/N] RV30/40 Decoder - RV40 decoder

Diego Biurrun diego
Mon Dec 3 13:50:16 CET 2007


On Mon, Dec 03, 2007 at 09:17:20AM +0200, Kostya wrote:
> 
> /**
>  * @file rv40.c
>  * RV40 decoder.

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> /**
>  * Initialize all tables

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> /**
>  * Get stored dimension from bitstream

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>  * If the width/height is the standard one then it's coded as 3-bit index.
>  * Otherwise it is coded as escaped 8-bit portions.

If the width/height is the standard one then it is coded as a 3 bit index.
Otherwise it is coded as escaped 8 bit portions.

> /**
>  * Get encoded picture size - usually this is called from rv40_parse_slice_header

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> /**
>  * Decode 4x4 intra types array

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>             /* Coefficients are read using VLC chosen by prediction pattern
>              * First one (used for retrieving a pair of coefficients) is
>              * constructed from top, top right and left coefficients
>              * Second one (used for retrieving only one coefficient) is
>              * top + 10 * left

            /* Coefficients are read using the VLC chosen by the prediction
             * pattern. The first one (used for retrieving a pair of
             * coefficients) is constructed from the top, top right and
             * left coefficients. The second one (used for retrieving
             * only one coefficient) is top + 10 * left.

> /**
>  * Decode macroblock information

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> /**
>  * Initialize decoder

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Diego




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