black 	-> nothing!  blocked on audio, not decoding video
blue	-> blocked on audio, decoding video
green 	-> blocked on video, decoding video
l.gray	-> loading, not decoding video
l.green	-> loading and decoding video

7816 samp/sec
/  4 frames/sec
1954 samp/frame

126  cycle/sample
* 1954 samp/frame
246204 cycle/frame

;H2O v1.0
;0	.word width	;image width (ambiguous)
;2	.word height	;#rasters in image
;4	.word frames	;#images in file
;6	.word tBase	;#audio samples per video timestamp unit
;CIFF v1.0 is not (directly) expandable from H2Ov1.0
;	.byte[4]	;codec 4 char code
;0	.word width	;image width
;2	.word height	;#rasters in image
;4	.dword frames	;#images in file
;8	.word tBase	;#audio samples per video timestamp unit
;10	.byte pad	;#padding rasters at top
;11	.byte pixType	;width of pixel, 1='thin' VDC normal,
;			 2='square' (VIC-II hi-res/ECM or VDC double-width),
;			 4='fat' (VIC-II multi-color)

lastSmp	;#samples at start of current video field (changes every 'main' IRQ)
nxtFts	;#samples per video timestamp unit (from file header)
delSmp	;#samples per video field (set at init, based on NTSC/PAL)
vTndx	;current time index
