📄 postprocess_template.c
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/*
* Copyright (C) 2001-2002 Michael Niedermayer (michaelni@gmx.at)
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file postprocess_template.c
* mmx/mmx2/3dnow postprocess code.
*/
#ifdef ARCH_X86_64
# define REGa rax
# define REGc rcx
# define REGd rdx
# define REG_a "rax"
# define REG_c "rcx"
# define REG_d "rdx"
# define REG_SP "rsp"
# define ALIGN_MASK "$0xFFFFFFFFFFFFFFF8"
#else
# define REGa eax
# define REGc ecx
# define REGd edx
# define REG_a "eax"
# define REG_c "ecx"
# define REG_d "edx"
# define REG_SP "esp"
# define ALIGN_MASK "$0xFFFFFFF8"
#endif
#undef PAVGB
#undef PMINUB
#undef PMAXUB
#ifdef HAVE_MMX2
#define REAL_PAVGB(a,b) "pavgb " #a ", " #b " \n\t"
#elif defined (HAVE_3DNOW)
#define REAL_PAVGB(a,b) "pavgusb " #a ", " #b " \n\t"
#endif
#define PAVGB(a,b) REAL_PAVGB(a,b)
#ifdef HAVE_MMX2
#define PMINUB(a,b,t) "pminub " #a ", " #b " \n\t"
#elif defined (HAVE_MMX)
#define PMINUB(b,a,t) \
"movq " #a ", " #t " \n\t"\
"psubusb " #b ", " #t " \n\t"\
"psubb " #t ", " #a " \n\t"
#endif
#ifdef HAVE_MMX2
#define PMAXUB(a,b) "pmaxub " #a ", " #b " \n\t"
#elif defined (HAVE_MMX)
#define PMAXUB(a,b) \
"psubusb " #a ", " #b " \n\t"\
"paddb " #a ", " #b " \n\t"
#endif
//FIXME? |255-0| = 1 (should not be a problem ...)
#ifdef HAVE_MMX
/**
* Check if the middle 8x8 Block in the given 8x16 block is flat
*/
static inline int RENAME(vertClassify)(uint8_t src[], int stride, PPContext *c){
int numEq= 0, dcOk;
src+= stride*4; // src points to begin of the 8x8 Block
asm volatile(
"movq %0, %%mm7 \n\t"
"movq %1, %%mm6 \n\t"
: : "m" (c->mmxDcOffset[c->nonBQP]), "m" (c->mmxDcThreshold[c->nonBQP])
);
asm volatile(
"lea (%2, %3), %%"REG_a" \n\t"
// 0 1 2 3 4 5 6 7 8 9
// %1 eax eax+%2 eax+2%2 %1+4%2 ecx ecx+%2 ecx+2%2 %1+8%2 ecx+4%2
"movq (%2), %%mm0 \n\t"
"movq (%%"REG_a"), %%mm1 \n\t"
"movq %%mm0, %%mm3 \n\t"
"movq %%mm0, %%mm4 \n\t"
PMAXUB(%%mm1, %%mm4)
PMINUB(%%mm1, %%mm3, %%mm5)
"psubb %%mm1, %%mm0 \n\t" // mm0 = differnece
"paddb %%mm7, %%mm0 \n\t"
"pcmpgtb %%mm6, %%mm0 \n\t"
"movq (%%"REG_a",%3), %%mm2 \n\t"
PMAXUB(%%mm2, %%mm4)
PMINUB(%%mm2, %%mm3, %%mm5)
"psubb %%mm2, %%mm1 \n\t"
"paddb %%mm7, %%mm1 \n\t"
"pcmpgtb %%mm6, %%mm1 \n\t"
"paddb %%mm1, %%mm0 \n\t"
"movq (%%"REG_a", %3, 2), %%mm1 \n\t"
PMAXUB(%%mm1, %%mm4)
PMINUB(%%mm1, %%mm3, %%mm5)
"psubb %%mm1, %%mm2 \n\t"
"paddb %%mm7, %%mm2 \n\t"
"pcmpgtb %%mm6, %%mm2 \n\t"
"paddb %%mm2, %%mm0 \n\t"
"lea (%%"REG_a", %3, 4), %%"REG_a" \n\t"
"movq (%2, %3, 4), %%mm2 \n\t"
PMAXUB(%%mm2, %%mm4)
PMINUB(%%mm2, %%mm3, %%mm5)
"psubb %%mm2, %%mm1 \n\t"
"paddb %%mm7, %%mm1 \n\t"
"pcmpgtb %%mm6, %%mm1 \n\t"
"paddb %%mm1, %%mm0 \n\t"
"movq (%%"REG_a"), %%mm1 \n\t"
PMAXUB(%%mm1, %%mm4)
PMINUB(%%mm1, %%mm3, %%mm5)
"psubb %%mm1, %%mm2 \n\t"
"paddb %%mm7, %%mm2 \n\t"
"pcmpgtb %%mm6, %%mm2 \n\t"
"paddb %%mm2, %%mm0 \n\t"
"movq (%%"REG_a", %3), %%mm2 \n\t"
PMAXUB(%%mm2, %%mm4)
PMINUB(%%mm2, %%mm3, %%mm5)
"psubb %%mm2, %%mm1 \n\t"
"paddb %%mm7, %%mm1 \n\t"
"pcmpgtb %%mm6, %%mm1 \n\t"
"paddb %%mm1, %%mm0 \n\t"
"movq (%%"REG_a", %3, 2), %%mm1 \n\t"
PMAXUB(%%mm1, %%mm4)
PMINUB(%%mm1, %%mm3, %%mm5)
"psubb %%mm1, %%mm2 \n\t"
"paddb %%mm7, %%mm2 \n\t"
"pcmpgtb %%mm6, %%mm2 \n\t"
"paddb %%mm2, %%mm0 \n\t"
"psubusb %%mm3, %%mm4 \n\t"
" \n\t"
#ifdef HAVE_MMX2
"pxor %%mm7, %%mm7 \n\t"
"psadbw %%mm7, %%mm0 \n\t"
#else
"movq %%mm0, %%mm1 \n\t"
"psrlw $8, %%mm0 \n\t"
"paddb %%mm1, %%mm0 \n\t"
"movq %%mm0, %%mm1 \n\t"
"psrlq $16, %%mm0 \n\t"
"paddb %%mm1, %%mm0 \n\t"
"movq %%mm0, %%mm1 \n\t"
"psrlq $32, %%mm0 \n\t"
"paddb %%mm1, %%mm0 \n\t"
#endif
"movq %4, %%mm7 \n\t" // QP,..., QP
"paddusb %%mm7, %%mm7 \n\t" // 2QP ... 2QP
"psubusb %%mm7, %%mm4 \n\t" // Diff <= 2QP -> 0
"packssdw %%mm4, %%mm4 \n\t"
"movd %%mm0, %0 \n\t"
"movd %%mm4, %1 \n\t"
: "=r" (numEq), "=r" (dcOk)
: "r" (src), "r" ((long)stride), "m" (c->pQPb)
: "%"REG_a
);
numEq= (-numEq) &0xFF;
if(numEq > c->ppMode.flatnessThreshold){
if(dcOk) return 0;
else return 1;
}else{
return 2;
}
}
#endif //HAVE_MMX
/**
* Do a vertical low pass filter on the 8x16 block (only write to the 8x8 block in the middle)
* using the 9-Tap Filter (1,1,2,2,4,2,2,1,1)/16
*/
#ifndef HAVE_ALTIVEC
static inline void RENAME(doVertLowPass)(uint8_t *src, int stride, PPContext *c)
{
#if defined (HAVE_MMX2) || defined (HAVE_3DNOW)
src+= stride*3;
asm volatile( //"movv %0 %1 %2\n\t"
"movq %2, %%mm0 \n\t" // QP,..., QP
"pxor %%mm4, %%mm4 \n\t"
"movq (%0), %%mm6 \n\t"
"movq (%0, %1), %%mm5 \n\t"
"movq %%mm5, %%mm1 \n\t"
"movq %%mm6, %%mm2 \n\t"
"psubusb %%mm6, %%mm5 \n\t"
"psubusb %%mm1, %%mm2 \n\t"
"por %%mm5, %%mm2 \n\t" // ABS Diff of lines
"psubusb %%mm0, %%mm2 \n\t" // diff <= QP -> 0
"pcmpeqb %%mm4, %%mm2 \n\t" // diff <= QP -> FF
"pand %%mm2, %%mm6 \n\t"
"pandn %%mm1, %%mm2 \n\t"
"por %%mm2, %%mm6 \n\t"// First Line to Filter
"movq (%0, %1, 8), %%mm5 \n\t"
"lea (%0, %1, 4), %%"REG_a" \n\t"
"lea (%0, %1, 8), %%"REG_c" \n\t"
"sub %1, %%"REG_c" \n\t"
"add %1, %0 \n\t" // %0 points to line 1 not 0
"movq (%0, %1, 8), %%mm7 \n\t"
"movq %%mm5, %%mm1 \n\t"
"movq %%mm7, %%mm2 \n\t"
"psubusb %%mm7, %%mm5 \n\t"
"psubusb %%mm1, %%mm2 \n\t"
"por %%mm5, %%mm2 \n\t" // ABS Diff of lines
"psubusb %%mm0, %%mm2 \n\t" // diff <= QP -> 0
"pcmpeqb %%mm4, %%mm2 \n\t" // diff <= QP -> FF
"pand %%mm2, %%mm7 \n\t"
"pandn %%mm1, %%mm2 \n\t"
"por %%mm2, %%mm7 \n\t" // First Line to Filter
// 1 2 3 4 5 6 7 8
// %0 %0+%1 %0+2%1 eax %0+4%1 eax+2%1 ecx eax+4%1
// 6 4 2 2 1 1
// 6 4 4 2
// 6 8 2
"movq (%0, %1), %%mm0 \n\t" // 1
"movq %%mm0, %%mm1 \n\t" // 1
PAVGB(%%mm6, %%mm0) //1 1 /2
PAVGB(%%mm6, %%mm0) //3 1 /4
"movq (%0, %1, 4), %%mm2 \n\t" // 1
"movq %%mm2, %%mm5 \n\t" // 1
PAVGB((%%REGa), %%mm2) // 11 /2
PAVGB((%0, %1, 2), %%mm2) // 211 /4
"movq %%mm2, %%mm3 \n\t" // 211 /4
"movq (%0), %%mm4 \n\t" // 1
PAVGB(%%mm4, %%mm3) // 4 211 /8
PAVGB(%%mm0, %%mm3) //642211 /16
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