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info about h and tpel

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Originally committed as revision 2639 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2003-12-30 19:19:45 +00:00
parent bb198e198a
commit 7d67aa9b0f
2 changed files with 6 additions and 1 deletions
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3
doc/optimization.txt
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@ -60,6 +60,9 @@ qpel{8,16}_mc??_old_c / *pixels{8,16}_l4
just used to workaround a bug in old libavcodec encoder
dont optimze them
tpel_mc_func {put,avg}_tpel_pixels_tab
used only for SVQ3, so only optimze them if u need fast SVQ3 decoding
add_bytes/diff_bytes
for huffyuv only, optimize if u want a faster ff-huffyuv codec

4
libavcodec/dsputil.h
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@ -79,6 +79,7 @@ void clear_blocks_c(DCTELEM *blocks);
/* add and put pixel (decoding) */
// blocksizes for op_pixels_func are 8x4,8x8 16x8 16x16
//h for op_pixels_func is limited to {width/2, width} but never larger than 16 and never smaller then 4
typedef void (*op_pixels_func)(uint8_t *block/*align width (8 or 16)*/, const uint8_t *pixels/*align 1*/, int line_size, int h);
typedef void (*tpel_mc_func)(uint8_t *block/*align width (8 or 16)*/, const uint8_t *pixels/*align 1*/, int line_size, int w, int h);
typedef void (*qpel_mc_func)(uint8_t *dst/*align width (8 or 16)*/, uint8_t *src/*align 1*/, int stride);
@ -109,7 +110,8 @@ static void a(uint8_t *block, const uint8_t *pixels, int line_size, int h){\
}
/* motion estimation */
// h is limited to {width/2, width, 2*width} but never larger than 16 and never smaller then 2
// allthough currently h<4 is not used as functions with width <8 are not used and neither implemented
typedef int (*me_cmp_func)(void /*MpegEncContext*/ *s, uint8_t *blk1/*align width (8 or 16)*/, uint8_t *blk2/*align 1*/, int line_size, int h)/* __attribute__ ((const))*/;