mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-05-27 15:52:28 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Initial import

Browse source
This commit is contained in:
Justine Tunney 2020-06-15 07:18:57 -07:00
commit c91b3c5006
14915 changed files with 590219 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

28
dsp/core/c1331s.h Normal file
View file

@ -0,0 +1,28 @@
#ifndef COSMOPOLITAN_DSP_CORE_C1331S_H_
#define COSMOPOLITAN_DSP_CORE_C1331S_H_
#if !(__ASSEMBLER__ + __LINKER__ + 0)
/**
* Byte sized kernel for resampling difference samples in half.
*
* @define (1*(a-128)+3*(a-128)+3*(a-128)+1*(a-128))/(1+3+3+1)+128
* @see C1331(), Y420CbCr2RgbScale()
*/
forceinline pureconst artificial signed char C1331S(signed char al,
signed char bl,
signed char cl,
signed char dl) {
short ax, bx;
bx = bl;
bx += cl;
bx *= 3;
ax = al;
ax += dl;
ax += bx;
ax += 4;
ax >>= 3;
return ax;
}
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_DSP_CORE_C1331S_H_ */