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48a05ceccd
ffmpeg/postproc/swscale.c
Michael Niedermayer 48a05ceccd oops 
Originally committed as revision 3137 to svn://svn.mplayerhq.hu/mplayer/trunk/postproc
2001-11-26 02:20:51 +00:00

246 lines
7.7 KiB
C
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// Software scaling and colorspace conversion routines for MPlayer
// Orginal C implementation by A'rpi/ESP-team <arpi@thot.banki.hu>
// current version mostly by Michael Niedermayer (michaelni@gmx.at)
// the parts written by michael are under GNU GPL
#include <inttypes.h>
#include <string.h>
#include "../config.h"
#include "swscale.h"
#include "../cpudetect.h"
#undef MOVNTQ
#undef PAVGB
//#undef HAVE_MMX2
//#undef HAVE_MMX
//#undef ARCH_X86
#define DITHER1XBPP
int fullUVIpol=0;
//disables the unscaled height version
int allwaysIpol=0;
#define RET 0xC3 //near return opcode
/*
NOTES
known BUGS with known cause (no bugreports please!, but patches are welcome :) )
horizontal MMX2 scaler reads 1-7 samples too much (might cause a sig11)
Supported output formats BGR15 BGR16 BGR24 BGR32
BGR15 & BGR16 MMX verions support dithering
Special versions: fast Y 1:1 scaling (no interpolation in y direction)
TODO
more intelligent missalignment avoidance for the horizontal scaler
bicubic scaler
dither in C
change the distance of the u & v buffer
how to differenciate between x86 an C at runtime ?! (using C for now)
*/
#define ABS(a) ((a) > 0 ? (a) : (-(a)))
#define MIN(a,b) ((a) > (b) ? (b) : (a))
#define MAX(a,b) ((a) < (b) ? (b) : (a))
#ifdef ARCH_X86
#define CAN_COMPILE_X86_ASM
#endif
#ifdef CAN_COMPILE_X86_ASM
static uint64_t __attribute__((aligned(8))) yCoeff= 0x2568256825682568LL;
static uint64_t __attribute__((aligned(8))) vrCoeff= 0x3343334333433343LL;
static uint64_t __attribute__((aligned(8))) ubCoeff= 0x40cf40cf40cf40cfLL;
static uint64_t __attribute__((aligned(8))) vgCoeff= 0xE5E2E5E2E5E2E5E2LL;
static uint64_t __attribute__((aligned(8))) ugCoeff= 0xF36EF36EF36EF36ELL;
static uint64_t __attribute__((aligned(8))) bF8= 0xF8F8F8F8F8F8F8F8LL;
static uint64_t __attribute__((aligned(8))) bFC= 0xFCFCFCFCFCFCFCFCLL;
static uint64_t __attribute__((aligned(8))) w400= 0x0400040004000400LL;
static uint64_t __attribute__((aligned(8))) w80= 0x0080008000800080LL;
static uint64_t __attribute__((aligned(8))) w10= 0x0010001000100010LL;
static uint64_t __attribute__((aligned(8))) bm00001111=0x00000000FFFFFFFFLL;
static uint64_t __attribute__((aligned(8))) bm00000111=0x0000000000FFFFFFLL;
static uint64_t __attribute__((aligned(8))) bm11111000=0xFFFFFFFFFF000000LL;
static volatile uint64_t __attribute__((aligned(8))) b5Dither;
static volatile uint64_t __attribute__((aligned(8))) g5Dither;
static volatile uint64_t __attribute__((aligned(8))) g6Dither;
static volatile uint64_t __attribute__((aligned(8))) r5Dither;
static uint64_t __attribute__((aligned(8))) dither4[2]={
0x0103010301030103LL,
0x0200020002000200LL,};
static uint64_t __attribute__((aligned(8))) dither8[2]={
0x0602060206020602LL,
0x0004000400040004LL,};
static uint64_t __attribute__((aligned(8))) b16Mask= 0x001F001F001F001FLL;
static uint64_t __attribute__((aligned(8))) g16Mask= 0x07E007E007E007E0LL;
static uint64_t __attribute__((aligned(8))) r16Mask= 0xF800F800F800F800LL;
static uint64_t __attribute__((aligned(8))) b15Mask= 0x001F001F001F001FLL;
static uint64_t __attribute__((aligned(8))) g15Mask= 0x03E003E003E003E0LL;
static uint64_t __attribute__((aligned(8))) r15Mask= 0x7C007C007C007C00LL;
static uint64_t __attribute__((aligned(8))) M24A= 0x00FF0000FF0000FFLL;
static uint64_t __attribute__((aligned(8))) M24B= 0xFF0000FF0000FF00LL;
static uint64_t __attribute__((aligned(8))) M24C= 0x0000FF0000FF0000LL;
static uint64_t __attribute__((aligned(8))) temp0;
static uint64_t __attribute__((aligned(8))) asm_yalpha1;
static uint64_t __attribute__((aligned(8))) asm_uvalpha1;
// temporary storage for 4 yuv lines:
// 16bit for now (mmx likes it more compact)
static uint16_t __attribute__((aligned(8))) pix_buf_y[4][2048];
static uint16_t __attribute__((aligned(8))) pix_buf_uv[2][2048*2];
#else
static uint16_t pix_buf_y[4][2048];
static uint16_t pix_buf_uv[2][2048*2];
#endif
// clipping helper table for C implementations:
static unsigned char clip_table[768];
static unsigned short clip_table16b[768];
static unsigned short clip_table16g[768];
static unsigned short clip_table16r[768];
static unsigned short clip_table15b[768];
static unsigned short clip_table15g[768];
static unsigned short clip_table15r[768];
// yuv->rgb conversion tables:
static int yuvtab_2568[256];
static int yuvtab_3343[256];
static int yuvtab_0c92[256];
static int yuvtab_1a1e[256];
static int yuvtab_40cf[256];
#ifdef CAN_COMPILE_X86_ASM
static uint8_t funnyYCode[10000];
static uint8_t funnyUVCode[10000];
#endif
static int canMMX2BeUsed=0;
#ifdef CAN_COMPILE_X86_ASM
void in_asm_used_var_warning_killer()
{
int i= yCoeff+vrCoeff+ubCoeff+vgCoeff+ugCoeff+bF8+bFC+w400+w80+w10+
bm00001111+bm00000111+bm11111000+b16Mask+g16Mask+r16Mask+b15Mask+g15Mask+r15Mask+temp0+asm_yalpha1+ asm_uvalpha1+
M24A+M24B+M24C;
if(i) i=0;
}
#endif
//Note: we have C, X86, MMX, MMX2, 3DNOW version therse no 3DNOW+MMX2 one
//Plain C versions
#undef HAVE_MMX
#undef HAVE_MMX2
#undef HAVE_3DNOW
#undef ARCH_X86
#define RENAME(a) a ## _C
#include "swscale_template.c"
#ifdef CAN_COMPILE_X86_ASM
//X86 versions
/*
#undef RENAME
#undef HAVE_MMX
#undef HAVE_MMX2
#undef HAVE_3DNOW
#define ARCH_X86
#define RENAME(a) a ## _X86
#include "swscale_template.c"
*/
//MMX versions
#undef RENAME
#define HAVE_MMX
#undef HAVE_MMX2
#undef HAVE_3DNOW
#define ARCH_X86
#define RENAME(a) a ## _MMX
#include "swscale_template.c"
//MMX2 versions
#undef RENAME
#define HAVE_MMX
#define HAVE_MMX2
#undef HAVE_3DNOW
#define ARCH_X86
#define RENAME(a) a ## _MMX2
#include "swscale_template.c"
//3DNOW versions
#undef RENAME
#define HAVE_MMX
#undef HAVE_MMX2
#define HAVE_3DNOW
#define ARCH_X86
#define RENAME(a) a ## _3DNow
#include "swscale_template.c"
#endif //CAN_COMPILE_X86_ASM
// minor note: the HAVE_xyz is messed up after that line so dont use it
// *** bilinear scaling and yuv->rgb or yuv->yuv conversion of yv12 slices:
// *** Note: it's called multiple times while decoding a frame, first time y==0
// *** Designed to upscale, but may work for downscale too.
// s_xinc = (src_width << 16) / dst_width
// s_yinc = (src_height << 16) / dst_height
// switching the cpu type during a sliced drawing can have bad effects, like sig11
void SwScale_YV12slice(unsigned char* srcptr[],int stride[], int y, int h,
uint8_t* dstptr[], int dststride, int dstw, int dstbpp,
unsigned int s_xinc,unsigned int s_yinc){
// scaling factors:
//static int s_yinc=(vo_dga_src_height<<16)/vo_dga_vp_height;
//static int s_xinc=(vo_dga_src_width<<8)/vo_dga_vp_width;
#ifdef CAN_COMPILE_X86_ASM
// ordered per speed fasterst first
if(gCpuCaps.hasMMX2)
SwScale_YV12slice_MMX2(srcptr, stride, y, h, dstptr, dststride, dstw, dstbpp, s_xinc, s_yinc);
else if(gCpuCaps.has3DNow)
SwScale_YV12slice_3DNow(srcptr, stride, y, h, dstptr, dststride, dstw, dstbpp, s_xinc, s_yinc);
else if(gCpuCaps.hasMMX)
SwScale_YV12slice_MMX(srcptr, stride, y, h, dstptr, dststride, dstw, dstbpp, s_xinc, s_yinc);
else
SwScale_YV12slice_C(srcptr, stride, y, h, dstptr, dststride, dstw, dstbpp, s_xinc, s_yinc);
#else
SwScale_YV12slice_C(srcptr, stride, y, h, dstptr, dststride, dstw, dstbpp, s_xinc, s_yinc);
#endif
}
void SwScale_Init(){
// generating tables:
int i;
for(i=0;i<256;i++){
clip_table[i]=0;
clip_table[i+256]=i;
clip_table[i+512]=255;
yuvtab_2568[i]=(0x2568*(i-16))+(256<<13);
yuvtab_3343[i]=0x3343*(i-128);
yuvtab_0c92[i]=-0x0c92*(i-128);
yuvtab_1a1e[i]=-0x1a1e*(i-128);
yuvtab_40cf[i]=0x40cf*(i-128);
}
for(i=0; i<768; i++)
{
int v= clip_table[i];
clip_table16b[i]= v>>3;
clip_table16g[i]= (v<<3)&0x07E0;
clip_table16r[i]= (v<<8)&0xF800;
clip_table15b[i]= v>>3;
clip_table15g[i]= (v<<2)&0x03E0;
clip_table15r[i]= (v<<7)&0x7C00;
}
}
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