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first pass on optimization of nif parsing functions from the file stream

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pull/298/head^2
7 years ago
parent 8c6a8ca48d
commit c72aa19d6d
3 changed files with 151 additions and 153 deletions
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2
components/files/constrainedfilestream.cpp
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@ -8,7 +8,7 @@
namespace
{
// somewhat arbitrary though 64KB buffers didn't seem to improve performance any
const size_t sBufferSize = 4096;
const size_t sBufferSize = 8192;
}
namespace Files

132
components/nif/nifstream.cpp
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@ -6,138 +6,8 @@ namespace Nif
{
//Private functions
uint8_t NIFStream::read_byte()
{
uint8_t byte;
inp->read((char*)&byte, 1);
return byte;
}
uint16_t NIFStream::read_le16()
{
uint8_t buffer[2];
inp->read((char*)buffer, 2);
return buffer[0] | (buffer[1]<<8);
}
uint32_t NIFStream::read_le32()
{
uint8_t buffer[4];
inp->read((char*)buffer, 4);
return buffer[0] | (buffer[1]<<8) | (buffer[2]<<16) | (buffer[3]<<24);
}
float NIFStream::read_le32f()
{
union {
uint32_t i;
float f;
} u = { read_le32() };
return u.f;
}
//Public functions
osg::Vec2f NIFStream::getVector2()
{
osg::Vec2f vec;
for(size_t i = 0;i < 2;i++)
vec._v[i] = getFloat();
return vec;
}
osg::Vec3f NIFStream::getVector3()
{
osg::Vec3f vec;
for(size_t i = 0;i < 3;i++)
vec._v[i] = getFloat();
return vec;
}
osg::Vec4f NIFStream::getVector4()
{
osg::Vec4f vec;
for(size_t i = 0;i < 4;i++)
vec._v[i] = getFloat();
return vec;
}
Matrix3 NIFStream::getMatrix3()
{
Matrix3 mat;
for(size_t i = 0;i < 3;i++)
{
for(size_t j = 0;j < 3;j++)
mat.mValues[i][j] = getFloat();
}
return mat;
}
osg::Quat NIFStream::getQuaternion()
{
osg::Quat quat;
quat.w() = getFloat();
quat.x() = getFloat();
quat.y() = getFloat();
quat.z() = getFloat();
return quat;
}
Transformation NIFStream::getTrafo()
{
Transformation t;
t.pos = getVector3();
t.rotation = getMatrix3();
t.scale = getFloat();
return t;
}
std::string NIFStream::getString(size_t length)
{
std::vector<char> str (length+1, 0);
inp->read(&str[0], length);
return &str[0];
}
std::string NIFStream::getString()
{
size_t size = read_le32();
return getString(size);
}
std::string NIFStream::getVersionString()
{
std::string result;
std::getline(*inp, result);
return result;
}
void NIFStream::getUShorts(std::vector<unsigned short> &vec, size_t size)
{
vec.resize(size);
for(size_t i = 0;i < vec.size();i++)
vec[i] = getUShort();
}
void NIFStream::getFloats(std::vector<float> &vec, size_t size)
{
vec.resize(size);
for(size_t i = 0;i < vec.size();i++)
vec[i] = getFloat();
}
void NIFStream::getVector2s(std::vector<osg::Vec2f> &vec, size_t size)
{
vec.resize(size);
for(size_t i = 0;i < vec.size();i++)
vec[i] = getVector2();
}
void NIFStream::getVector3s(std::vector<osg::Vec3f> &vec, size_t size)
{
vec.resize(size);
for(size_t i = 0;i < vec.size();i++)
vec[i] = getVector3();
}
void NIFStream::getVector4s(std::vector<osg::Vec4f> &vec, size_t size)
{
vec.resize(size);
for(size_t i = 0;i < vec.size();i++)
vec[i] = getVector4();
}
void NIFStream::getQuaternions(std::vector<osg::Quat> &quat, size_t size)
{
quat.resize(size);
for(size_t i = 0;i < quat.size();i++)
quat[i] = getQuaternion();
}
//Public functions
}

170
components/nif/nifstream.hpp
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@ -2,7 +2,7 @@
#ifndef OPENMW_COMPONENTS_NIF_NIFSTREAM_HPP
#define OPENMW_COMPONENTS_NIF_NIFSTREAM_HPP
#include <xmmintrin.h>
#include <cassert>
#include <stdint.h>
#include <stdexcept>
@ -26,10 +26,44 @@ class NIFStream {
/// Input stream
Files::IStreamPtr inp;
uint8_t read_byte();
uint16_t read_le16();
uint32_t read_le32();
float read_le32f();
uint8_t read_byte() {
uint8_t byte;
inp->read((char*)&byte, 1);
return byte;
}
uint16_t read_le16() {
alignas(2) uint8_t buffer[2];
inp->read((char*)buffer, 2);
return static_cast<uint16_t>(*((uint16_t*)buffer));
}
uint32_t read_le32() {
alignas(4) uint8_t buffer[4];
inp->read((char*)buffer, 4);
return static_cast<uint32_t>(*((uint32_t*)buffer));
}
uint64_t read_le64() {
alignas(8) uint8_t buffer[8];
inp->read((char*)buffer, 8);
return static_cast<uint64_t>(*((uint64_t*)buffer));
}
__m128 read_le96() {
alignas(8) uint8_t buffer[16];
inp->read((char*)buffer, 12);
return static_cast<__m128>(*((__m128*)buffer));
}
__m128 read_le128() {
alignas(16) uint8_t buffer[16];
inp->read((char*)buffer, 16);
return static_cast<__m128>(*((__m128*)buffer));
}
float read_le32f() {
union {
uint32_t i;
float f;
} u = { read_le32() };
return u.f;
}
public:
@ -46,26 +80,120 @@ public:
unsigned int getUInt() { return read_le32(); }
float getFloat() { return read_le32f(); }
osg::Vec2f getVector2();
osg::Vec3f getVector3();
osg::Vec4f getVector4();
Matrix3 getMatrix3();
osg::Quat getQuaternion();
Transformation getTrafo();
osg::Vec2f getVector2() {
union {
uint64_t i;
float f[2];
} u = { read_le64() };
osg::Vec2f vec;
for (size_t i = 0;i < 2;i++)
vec._v[i] = u.f[i];
return vec;
}
osg::Vec3f getVector3() {
union {
__m128 i;
float f[4];
} u = { read_le96() };
osg::Vec3f vec;
for (size_t i = 0;i < 3;i++)
vec._v[i] = u.f[i];
return vec;
}
osg::Vec4f getVector4() {
union {
__m128 i;
float f[4];
} u = { read_le128() };
osg::Vec4f vec;
for (size_t i = 0;i < 4;i++)
vec._v[i] = u.f[i];
return vec;
}
Matrix3 getMatrix3() {
Matrix3 mat;
alignas(16) union {
float f[9];
uint8_t buffer[36];
} u;
inp->read((char*)u.buffer, 36);
for (size_t i = 0;i < 3;i++)
{
for (size_t j = 0;j < 3;j++)
mat.mValues[i][j] = u.f[3*i+j];
}
return mat;
}
osg::Quat getQuaternion() {
union {
__m128 i;
float f[4];
} u = { read_le128() };
osg::Quat quat;
quat.w() = u.f[0];
quat.x() = u.f[1];
quat.y() = u.f[2];
quat.z() = u.f[3];
return quat;
}
Transformation getTrafo() {
Transformation t;
t.pos = getVector3();
t.rotation = getMatrix3();
t.scale = getFloat();
return t;
}
///Read in a string of the given length
std::string getString(size_t length);
std::string getString(size_t length) {
std::vector<char> str(length + 1, 0);
inp->read(&str[0], length);
return &str[0];
}
///Read in a string of the length specified in the file
std::string getString();
std::string getString() {
size_t size = read_le32();
return getString(size);
}
///This is special since the version string doesn't start with a number, and ends with "\n"
std::string getVersionString();
void getUShorts(std::vector<unsigned short> &vec, size_t size);
void getFloats(std::vector<float> &vec, size_t size);
void getVector2s(std::vector<osg::Vec2f> &vec, size_t size);
void getVector3s(std::vector<osg::Vec3f> &vec, size_t size);
void getVector4s(std::vector<osg::Vec4f> &vec, size_t size);
void getQuaternions(std::vector<osg::Quat> &quat, size_t size);
std::string getVersionString() {
std::string result;
std::getline(*inp, result);
return result;
}
void getUShorts(std::vector<unsigned short> &vec, size_t size) {
vec.resize(size);
for (size_t i = 0;i < vec.size();i++)
vec[i] = getUShort();
}
void getFloats(std::vector<float> &vec, size_t size) {
vec.resize(size);
for (size_t i = 0;i < vec.size();i++)
vec[i] = getFloat();
}
void getVector2s(std::vector<osg::Vec2f> &vec, size_t size) {
vec.resize(size);
for (size_t i = 0;i < vec.size();i++)
vec[i] = getVector2();
}
void getVector3s(std::vector<osg::Vec3f> &vec, size_t size) {
vec.resize(size);
for (size_t i = 0;i < vec.size();i++)
vec[i] = getVector3();
}
void getVector4s(std::vector<osg::Vec4f> &vec, size_t size) {
vec.resize(size);
for (size_t i = 0;i < vec.size();i++)
vec[i] = getVector4();
}
void getQuaternions(std::vector<osg::Quat> &quat, size_t size) {
quat.resize(size);
for (size_t i = 0;i < quat.size();i++)
quat[i] = getQuaternion();
}
};
}

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