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// VirtualDub - Video processing and capture application
// Copyright (C) 1998-2001 Avery Lee
//
// This program 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.
//
// This program 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 this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#include "stdafx.h"
void AvgLines8(BYTE* dst, DWORD h, DWORD pitch)
{
if (h <= 1) {
return;
}
BYTE* s = dst;
BYTE* d = dst + (h-2)*pitch;
for (; s < d; s += pitch*2) {
BYTE* tmp = s;
#ifndef _WIN64
if ((g_cpuid.m_flags & CCpuID::sse2) && !((DWORD)tmp&0xf) && !((DWORD)pitch&0xf)) {
__asm {
mov esi, tmp
mov ebx, pitch
mov ecx, ebx
shr ecx, 4
AvgLines8_sse2_loop:
movdqa xmm0, [esi]
pavgb xmm0, [esi+ebx*2]
movdqa [esi+ebx], xmm0
add esi, 16
dec ecx
jnz AvgLines8_sse2_loop
mov tmp, esi
}
for (ptrdiff_t i = pitch&7; i--; tmp++) {
tmp[pitch] = (tmp[0] + tmp[pitch<<1] + 1) >> 1;
}
} else if (g_cpuid.m_flags & CCpuID::mmx) {
__asm {
mov esi, tmp
mov ebx, pitch
mov ecx, ebx
shr ecx, 3
pxor mm7, mm7
AvgLines8_mmx_loop:
movq mm0, [esi]
movq mm1, mm0
punpcklbw mm0, mm7
punpckhbw mm1, mm7
movq mm2, [esi+ebx*2]
movq mm3, mm2
punpcklbw mm2, mm7
punpckhbw mm3, mm7
paddw mm0, mm2
psrlw mm0, 1
paddw mm1, mm3
psrlw mm1, 1
packuswb mm0, mm1
movq [esi+ebx], mm0
lea esi, [esi+8]
dec ecx
jnz AvgLines8_mmx_loop
mov tmp, esi
}
for (ptrdiff_t i = pitch&7; i--; tmp++) {
tmp[pitch] = (tmp[0] + tmp[pitch<<1] + 1) >> 1;
}
} else
#endif
{
for (ptrdiff_t i = pitch; i--; tmp++) {
tmp[pitch] = (tmp[0] + tmp[pitch<<1] + 1) >> 1;
}
}
}
if (!(h&1) && h >= 2) {
dst += (h-2)*pitch;
memcpy(dst + pitch, dst, pitch);
}
#ifndef _WIN64
__asm emms;
#endif
}
void AvgLines555(BYTE* dst, DWORD h, DWORD pitch)
{
if (h <= 1) {
return;
}
unsigned __int64 __0x03e003e003e003e0 = 0x03e003e003e003e0;
unsigned __int64 __0x001f001f001f001f = 0x001f001f001f001f;
BYTE* s = dst;
BYTE* d = dst + (h-2)*pitch;
for (; s < d; s += pitch*2) {
BYTE* tmp = s;
#ifndef _WIN64
__asm {
mov esi, tmp
mov ebx, pitch
mov ecx, ebx
shr ecx, 3
movq mm6, __0x03e003e003e003e0
movq mm7, __0x001f001f001f001f
AvgLines555_loop:
movq mm0, [esi]
movq mm1, mm0
movq mm2, mm0
psrlw mm0, 10 // red1 bits: mm0 = 001f001f001f001f
pand mm1, mm6 // green1 bits: mm1 = 03e003e003e003e0
pand mm2, mm7 // blue1 bits: mm2 = 001f001f001f001f
movq mm3, [esi+ebx*2]
movq mm4, mm3
movq mm5, mm3
psrlw mm3, 10 // red2 bits: mm3 = 001f001f001f001f
pand mm4, mm6 // green2 bits: mm4 = 03e003e003e003e0
pand mm5, mm7 // blue2 bits: mm5 = 001f001f001f001f
paddw mm0, mm3
psrlw mm0, 1 // (red1+red2)/2
psllw mm0, 10 // red bits at 7c007c007c007c00
paddw mm1, mm4
psrlw mm1, 1 // (green1+green2)/2
pand mm1, mm6 // green bits at 03e003e003e003e0
paddw mm2, mm5
psrlw mm2, 1 // (blue1+blue2)/2
// blue bits at 001f001f001f001f (no need to pand, lower bits were discareded)
por mm0, mm1
por mm0, mm2
movq [esi+ebx], mm0
lea esi, [esi+8]
dec ecx
jnz AvgLines555_loop
mov tmp, esi
}
#endif
for (ptrdiff_t i = (pitch&7)>>1; i--; tmp++) {
tmp[pitch] =
((((*tmp&0x7c00) + (tmp[pitch<<1]&0x7c00)) >> 1)&0x7c00)|
((((*tmp&0x03e0) + (tmp[pitch<<1]&0x03e0)) >> 1)&0x03e0)|
((((*tmp&0x001f) + (tmp[pitch<<1]&0x001f)) >> 1)&0x001f);
}
}
if (!(h&1) && h >= 2) {
dst += (h-2)*pitch;
memcpy(dst + pitch, dst, pitch);
}
#ifndef _WIN64
__asm emms;
#endif
}
void AvgLines565(BYTE* dst, DWORD h, DWORD pitch)
{
if (h <= 1) {
return;
}
unsigned __int64 __0x07e007e007e007e0 = 0x07e007e007e007e0;
unsigned __int64 __0x001f001f001f001f = 0x001f001f001f001f;
BYTE* s = dst;
BYTE* d = dst + (h-2)*pitch;
for (; s < d; s += pitch*2) {
WORD* tmp = (WORD*)s;
#ifndef _WIN64
__asm {
mov esi, tmp
mov ebx, pitch
mov ecx, ebx
shr ecx, 3
movq mm6, __0x07e007e007e007e0
movq mm7, __0x001f001f001f001f
AvgLines565_loop:
movq mm0, [esi]
movq mm1, mm0
movq mm2, mm0
psrlw mm0, 11 // red1 bits: mm0 = 001f001f001f001f
pand mm1, mm6 // green1 bits: mm1 = 07e007e007e007e0
pand mm2, mm7 // blue1 bits: mm2 = 001f001f001f001f
movq mm3, [esi+ebx*2]
movq mm4, mm3
movq mm5, mm3
psrlw mm3, 11 // red2 bits: mm3 = 001f001f001f001f
pand mm4, mm6 // green2 bits: mm4 = 07e007e007e007e0
pand mm5, mm7 // blue2 bits: mm5 = 001f001f001f001f
paddw mm0, mm3
psrlw mm0, 1 // (red1+red2)/2
psllw mm0, 11 // red bits at f800f800f800f800
paddw mm1, mm4
psrlw mm1, 1 // (green1+green2)/2
pand mm1, mm6 // green bits at 03e003e003e003e0
paddw mm2, mm5
psrlw mm2, 1 // (blue1+blue2)/2
// blue bits at 001f001f001f001f (no need to pand, lower bits were discareded)
por mm0, mm1
por mm0, mm2
movq [esi+ebx], mm0
lea esi, [esi+8]
dec ecx
jnz AvgLines565_loop
mov tmp, esi
}
#else
for (ptrdiff_t wd=(pitch>>3); wd--; tmp++) {
tmp[0] =
((((*tmp&0xf800) + (tmp[pitch<<1]&0xf800)) >> 1)&0xf800)|
((((*tmp&0x07e0) + (tmp[pitch<<1]&0x07e0)) >> 1)&0x07e0)|
((((*tmp&0x001f) + (tmp[pitch<<1]&0x001f)) >> 1)&0x001f);
}
#endif
for (ptrdiff_t i = (pitch&7)>>1; i--; tmp++) {
tmp[pitch] =
((((*tmp&0xf800) + (tmp[pitch<<1]&0xf800)) >> 1)&0xf800)|
((((*tmp&0x07e0) + (tmp[pitch<<1]&0x07e0)) >> 1)&0x07e0)|
((((*tmp&0x001f) + (tmp[pitch<<1]&0x001f)) >> 1)&0x001f);
}
}
if (!(h&1) && h >= 2) {
dst += (h-2)*pitch;
memcpy(dst + pitch, dst, pitch);
}
#ifndef _WIN64
__asm emms;
#endif
}
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