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// VirtualDub - Video processing and capture application
// System library component
// Copyright (C) 1998-2004 Avery Lee, All Rights Reserved.
//
// Beginning with 1.6.0, the VirtualDub system library is licensed
// differently than the remainder of VirtualDub. This particular file is
// thus licensed as follows (the "zlib" license):
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any
// damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must
// not claim that you wrote the original software. If you use this
// software in a product, an acknowledgment in the product
// documentation would be appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must
// not be misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source
// distribution.
#include "stdafx.h"
#include <malloc.h>
#include <windows.h>
#include <vd2/system/atomic.h>
#include <vd2/system/memory.h>
#include <vd2/system/cpuaccel.h>
void *VDAlignedMalloc(size_t n, unsigned alignment) {
return _aligned_malloc(n, alignment);
}
void VDAlignedFree(void *p) {
_aligned_free(p);
}
void *VDAlignedVirtualAlloc(size_t n) {
return VirtualAlloc(NULL, n, MEM_COMMIT, PAGE_READWRITE);
}
void VDAlignedVirtualFree(void *p) {
VirtualFree(p, 0, MEM_RELEASE);
}
void VDSwapMemoryScalar(void *p0, void *p1, size_t bytes) {
uint32 *dst0 = (uint32 *)p0;
uint32 *dst1 = (uint32 *)p1;
while(bytes >= 4) {
uint32 a = *dst0;
uint32 b = *dst1;
*dst0++ = b;
*dst1++ = a;
bytes -= 4;
}
char *dstb0 = (char *)dst0;
char *dstb1 = (char *)dst1;
while(bytes--) {
char a = *dstb0;
char b = *dstb1;
*dstb0++ = b;
*dstb1++ = a;
}
}
#if defined(VD_CPU_AMD64) || defined(VD_CPU_X86)
void VDSwapMemorySSE(void *p0, void *p1, size_t bytes) {
if (((uint32)(size_t)p0 | (uint32)(size_t)p1) & 15)
return VDSwapMemoryScalar(p0, p1, bytes);
__m128 *pv0 = (__m128 *)p0;
__m128 *pv1 = (__m128 *)p1;
size_t veccount = bytes >> 4;
if (veccount) {
do {
__m128 v0 = *pv0;
__m128 v1 = *pv1;
*pv0++ = v1;
*pv1++ = v0;
} while(--veccount);
}
uint32 left = bytes & 15;
if (left) {
uint8 *pb0 = (uint8 *)pv0;
uint8 *pb1 = (uint8 *)pv1;
do {
uint8 b0 = *pb0;
uint8 b1 = *pb1;
*pb0++ = b1;
*pb1++ = b0;
} while(--left);
}
}
#endif
void (__cdecl *VDSwapMemory)(void *p0, void *p1, size_t bytes) = VDSwapMemoryScalar;
void VDInvertMemory(void *p, unsigned bytes) {
char *dst = (char *)p;
if (!bytes)
return;
while((int)dst & 3) {
*dst = ~*dst;
++dst;
if (!--bytes)
return;
}
unsigned lcount = bytes >> 2;
if (lcount)
do {
*(long *)dst = ~*(long *)dst;
dst += 4;
} while(--lcount);
bytes &= 3;
while(bytes--) {
*dst = ~*dst;
++dst;
}
}
namespace {
uintptr VDGetSystemPageSizeW32() {
SYSTEM_INFO sysInfo;
GetSystemInfo(&sysInfo);
return sysInfo.dwPageSize;
}
uintptr VDGetSystemPageSize() {
static uintptr pageSize = VDGetSystemPageSizeW32();
return pageSize;
}
}
bool VDIsValidReadRegion(const void *p0, size_t bytes) {
if (!bytes)
return true;
if (!p0)
return false;
uintptr pageSize = VDGetSystemPageSize();
uintptr p = (uintptr)p0;
uintptr pLimit = p + (bytes-1);
__try {
for(;;) {
*(volatile char *)p;
if (pLimit - p < pageSize)
break;
p += pageSize;
}
} __except(1) {
return false;
}
return true;
}
bool VDIsValidWriteRegion(void *p0, size_t bytes) {
if (!bytes)
return true;
if (!p0)
return false;
// Note: Unlike IsValidWritePtr(), this is threadsafe.
uintptr pageSize = VDGetSystemPageSize();
uintptr p = (uintptr)p0;
uintptr pLimit = p + (bytes-1);
p &= ~(uintptr)3;
__try {
for(;;) {
VDAtomicInt::staticCompareExchange((volatile int *)p, 0xa5, 0xa5);
if (pLimit - p < pageSize)
break;
p += pageSize;
}
} __except(1) {
return false;
}
return true;
}
bool VDCompareRect(void *dst, ptrdiff_t dstpitch, const void *src, ptrdiff_t srcpitch, size_t w, size_t h) {
if (!w || !h)
return false;
do {
if (memcmp(dst, src, w))
return true;
dst = (char *)dst + dstpitch;
src = (const char *)src + srcpitch;
} while(--h);
return false;
}
const void *VDMemCheck8(const void *src, uint8 value, size_t count) {
if (count) {
const uint8 *src8 = (const uint8 *)src;
do {
if (*src8 != value)
return src8;
++src8;
} while(--count);
}
return NULL;
}
void VDMemset8(void *dst, uint8 value, size_t count) {
if (count) {
uint8 *dst2 = (uint8 *)dst;
do {
*dst2++ = value;
} while(--count);
}
}
void VDMemset16(void *dst, uint16 value, size_t count) {
if (count) {
uint16 *dst2 = (uint16 *)dst;
do {
*dst2++ = value;
} while(--count);
}
}
void VDMemset24(void *dst, uint32 value, size_t count) {
if (count) {
uint8 *dst2 = (uint8 *)dst;
uint8 c0 = (uint8)value;
uint8 c1 = (uint8)(value >> 8);
uint8 c2 = (uint8)(value >> 16);
do {
*dst2++ = c0;
*dst2++ = c1;
*dst2++ = c2;
} while(--count);
}
}
void VDMemset32(void *dst, uint32 value, size_t count) {
if (count) {
uint32 *dst2 = (uint32 *)dst;
do {
*dst2++ = value;
} while(--count);
}
}
void VDMemset64(void *dst, uint64 value, size_t count) {
if (count) {
uint64 *dst2 = (uint64 *)dst;
do {
*dst2++ = value;
} while(--count);
}
}
void VDMemset128(void *dst, const void *src0, size_t count) {
if (count) {
const uint32 *src = (const uint32 *)src0;
uint32 a0 = src[0];
uint32 a1 = src[1];
uint32 a2 = src[2];
uint32 a3 = src[3];
uint32 *dst2 = (uint32 *)dst;
do {
dst2[0] = a0;
dst2[1] = a1;
dst2[2] = a2;
dst2[3] = a3;
dst2 += 4;
} while(--count);
}
}
void VDMemsetPointer(void *dst, const void *value, size_t count) {
#if defined(_M_IX86)
VDMemset32(dst, (uint32)(size_t)value, count);
#elif defined(_M_AMD64)
VDMemset64(dst, (uint64)(size_t)value, count);
#else
#error Unknown pointer size
#endif
}
void VDMemset8Rect(void *dst, ptrdiff_t pitch, uint8 value, size_t w, size_t h) {
if (w>0 && h>0) {
do {
memset(dst, value, w);
dst = (char *)dst + pitch;
} while(--h);
}
}
void VDMemset16Rect(void *dst, ptrdiff_t pitch, uint16 value, size_t w, size_t h) {
if (w>0 && h>0) {
do {
VDMemset16(dst, value, w);
dst = (char *)dst + pitch;
} while(--h);
}
}
void VDMemset24Rect(void *dst, ptrdiff_t pitch, uint32 value, size_t w, size_t h) {
if (w>0 && h>0) {
do {
VDMemset24(dst, value, w);
dst = (char *)dst + pitch;
} while(--h);
}
}
void VDMemset32Rect(void *dst, ptrdiff_t pitch, uint32 value, size_t w, size_t h) {
if (w>0 && h>0) {
do {
VDMemset32(dst, value, w);
dst = (char *)dst + pitch;
} while(--h);
}
}
#if defined(_WIN32) && defined(_M_IX86)
extern "C" void __cdecl VDFastMemcpyPartialScalarAligned8(void *dst, const void *src, size_t bytes);
extern "C" void __cdecl VDFastMemcpyPartialMMX(void *dst, const void *src, size_t bytes);
extern "C" void __cdecl VDFastMemcpyPartialMMX2(void *dst, const void *src, size_t bytes);
extern "C" void __cdecl VDFastMemcpyPartialSSE2(void *dst, const void *src, size_t bytes);
void VDFastMemcpyPartialScalar(void *dst, const void *src, size_t bytes) {
if (!(((int)dst | (int)src | bytes) & 7))
VDFastMemcpyPartialScalarAligned8(dst, src, bytes);
else
memcpy(dst, src, bytes);
}
void VDFastMemcpyFinishScalar() {
}
void __cdecl VDFastMemcpyFinishMMX() {
__asm emms
}
void __cdecl VDFastMemcpyFinishMMX2() {
__asm emms
__asm sfence
}
void (__cdecl *VDFastMemcpyPartial)(void *dst, const void *src, size_t bytes) = VDFastMemcpyPartialScalar;
void (__cdecl *VDFastMemcpyFinish)() = VDFastMemcpyFinishScalar;
void VDFastMemcpyAutodetect() {
long exts = CPUGetEnabledExtensions();
// MPC custom code (begin)
if (exts & CPUF_SUPPORTS_SSE2) {
VDFastMemcpyPartial = VDFastMemcpyPartialSSE2;
VDFastMemcpyFinish = VDFastMemcpyFinishMMX2;
VDSwapMemory = VDSwapMemorySSE;
// MPC custom code (end)
} else if (exts & CPUF_SUPPORTS_SSE) {
VDFastMemcpyPartial = VDFastMemcpyPartialMMX2;
VDFastMemcpyFinish = VDFastMemcpyFinishMMX2;
VDSwapMemory = VDSwapMemorySSE;
} else if (exts & CPUF_SUPPORTS_INTEGER_SSE) {
VDFastMemcpyPartial = VDFastMemcpyPartialMMX2;
VDFastMemcpyFinish = VDFastMemcpyFinishMMX2;
VDSwapMemory = VDSwapMemoryScalar;
} else if (exts & CPUF_SUPPORTS_MMX) {
VDFastMemcpyPartial = VDFastMemcpyPartialMMX;
VDFastMemcpyFinish = VDFastMemcpyFinishMMX;
VDSwapMemory = VDSwapMemoryScalar;
} else {
VDFastMemcpyPartial = VDFastMemcpyPartialScalar;
VDFastMemcpyFinish = VDFastMemcpyFinishScalar;
VDSwapMemory = VDSwapMemoryScalar;
}
}
#else
void VDFastMemcpyPartial(void *dst, const void *src, size_t bytes) {
memcpy(dst, src, bytes);
}
void VDFastMemcpyFinish() {
}
void VDFastMemcpyAutodetect() {
}
#endif
void VDMemcpyRect(void *dst, ptrdiff_t dststride, const void *src, ptrdiff_t srcstride, size_t w, size_t h) {
if (w <= 0 || h <= 0)
return;
// MPC custom code (begin)
#ifdef _DEBUG
if (CPUGetEnabledExtensions() & CPUF_SUPPORTS_SSE2) {
_ASSERT(!(((UINT_PTR)dst | (UINT_PTR)src) & 0xF));
if (h > 1) {
_ASSERT(!((dststride | srcstride) & 0xF));
}
}
#endif
// MPC custom code (end)
if (w == srcstride && w == dststride)
VDFastMemcpyPartial(dst, src, w*h);
// MPC custom code (begin)
else if (w == -srcstride && w == -dststride)
VDFastMemcpyPartial((char *)dst + dststride * (h - 1), (char *)src + srcstride * (h - 1), w*h);
// MPC custom code (end)
else {
char *dst2 = (char *)dst;
const char *src2 = (const char *)src;
do {
VDFastMemcpyPartial(dst2, src2, w);
dst2 += dststride;
src2 += srcstride;
} while(--h);
}
VDFastMemcpyFinish();
}
bool VDMemcpyGuarded(void *dst, const void *src, size_t bytes) {
__try {
memcpy(dst, src, bytes);
} __except(GetExceptionCode() == STATUS_ACCESS_VIOLATION ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH) {
return false;
}
return true;
}
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