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* plain bugs
* fix VIS IDCT code (handling of nonprogressive frame pictures)
* things we dont implement yet
* more verbose error reporting
* export MC information (for XvMC or for error resilience)
* export quantizer information (for postprocessing filters)
* dont crash on bad streams, make sure we can resync after a while
* possible chunk buffer overflow while reading bits
* synchronization stuff (play at correct speed)
* IDCT precision with sparse matrixes
* sparc IDCT optimizations
* support for still pictures (decode before receiving next startcode !)
* structural optimizations
* do yuv per sub-slice (probably big speed boost)
* try different memory arrangements for pictures (yuyv, stride, ...)
* once we have sync, call draw_frame before decoding I or P not after
* local optimizations
* put most common fields at start of decoder_t structure
* fix code that uses multiples of the stride (use preshifted value ?)
* avoid 8-bit accesses particularly on alpha
* use 64-bit shift register for parsing on 64-bit arches
* use restrict (__restrict__) pointers: int * restrict p;
* try feig IDCT ?
* review the use of static inline functions
* improve MMX motion comp inner routines
* optimize IDCT for very sparse input matrixes ?
* optimize startcode search loop ?
* bit parsing / DCT parsing optimizations
* clean up
* clean up header file usage
* clean up yuv2rgb for interlaced pictures (handling of uv)
* clean up decoder_t structure (some variables should be local ?)
* clean up slice_init
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