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opencv/modules/core/src/hal_internal.cpp
luz.paz fcc7d8dd4e Fix modules/ typos 
Found using `codespell -q 3 -S ./3rdparty -L activ,amin,ang,atleast,childs,dof,endwhile,halfs,hist,iff,nd,od,uint`

backporting of commit: ec43292e1e
2019-08-16 17:34:29 +03:00

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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
// Copyright (C) 2013, OpenCV Foundation, all rights reserved.
// Copyright (C) 2015, Itseez Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
#include "hal_internal.hpp"
#ifdef HAVE_LAPACK
#include <complex.h>
#include "opencv_lapack.h"
#include <cmath>
#include <algorithm>
#include <typeinfo>
#include <limits>
#include <complex>
#include <vector>
#define HAL_GEMM_SMALL_COMPLEX_MATRIX_THRESH 100
#define HAL_GEMM_SMALL_MATRIX_THRESH 100
#define HAL_SVD_SMALL_MATRIX_THRESH 25
#define HAL_QR_SMALL_MATRIX_THRESH 30
#define HAL_LU_SMALL_MATRIX_THRESH 100
#define HAL_CHOLESKY_SMALL_MATRIX_THRESH 100
//lapack stores matrices in column-major order so transposing is needed everywhere
template <typename fptype> static inline void
transpose_square_inplace(fptype *src, size_t src_ld, size_t m)
{
for(size_t i = 0; i < m - 1; i++)
for(size_t j = i + 1; j < m; j++)
std::swap(src[j*src_ld + i], src[i*src_ld + j]);
}
template <typename fptype> static inline void
transpose(const fptype *src, size_t src_ld, fptype* dst, size_t dst_ld, size_t m, size_t n)
{
for(size_t i = 0; i < m; i++)
for(size_t j = 0; j < n; j++)
dst[j*dst_ld + i] = src[i*src_ld + j];
}
template <typename fptype> static inline void
copy_matrix(const fptype *src, size_t src_ld, fptype* dst, size_t dst_ld, size_t m, size_t n)
{
for(size_t i = 0; i < m; i++)
for(size_t j = 0; j < n; j++)
dst[i*dst_ld + j] = src[i*src_ld + j];
}
template <typename fptype> static inline void
set_value(fptype *dst, size_t dst_ld, fptype value, size_t m, size_t n)
{
for(size_t i = 0; i < m; i++)
for(size_t j = 0; j < n; j++)
dst[i*dst_ld + j] = value;
}
template <typename fptype> static inline int
lapack_LU(fptype* a, size_t a_step, int m, fptype* b, size_t b_step, int n, int* info)
{
int lda = (int)(a_step / sizeof(fptype)), sign = 0;
int* piv = new int[m];
transpose_square_inplace(a, lda, m);
if(b)
{
if(n == 1 && b_step == sizeof(fptype))
{
if(typeid(fptype) == typeid(float))
sgesv_(&m, &n, (float*)a, &lda, piv, (float*)b, &m, info);
else if(typeid(fptype) == typeid(double))
dgesv_(&m, &n, (double*)a, &lda, piv, (double*)b, &m, info);
}
else
{
int ldb = (int)(b_step / sizeof(fptype));
fptype* tmpB = new fptype[m*n];
transpose(b, ldb, tmpB, m, m, n);
if(typeid(fptype) == typeid(float))
sgesv_(&m, &n, (float*)a, &lda, piv, (float*)tmpB, &m, info);
else if(typeid(fptype) == typeid(double))
dgesv_(&m, &n, (double*)a, &lda, piv, (double*)tmpB, &m, info);
transpose(tmpB, m, b, ldb, n, m);
delete[] tmpB;
}
}
else
{
if(typeid(fptype) == typeid(float))
sgetrf_(&m, &m, (float*)a, &lda, piv, info);
else if(typeid(fptype) == typeid(double))
dgetrf_(&m, &m, (double*)a, &lda, piv, info);
}
if(*info == 0)
{
for(int i = 0; i < m; i++)
sign ^= piv[i] != i + 1;
*info = sign ? -1 : 1;
}
else
*info = 0; //in opencv LU function zero means error
delete[] piv;
return CV_HAL_ERROR_OK;
}
template <typename fptype> static inline int
lapack_Cholesky(fptype* a, size_t a_step, int m, fptype* b, size_t b_step, int n, bool* info)
{
int lapackStatus = 0;
int lda = (int)(a_step / sizeof(fptype));
char L[] = {'L', '\0'};
if(b)
{
if(n == 1 && b_step == sizeof(fptype))
{
if(typeid(fptype) == typeid(float))
sposv_(L, &m, &n, (float*)a, &lda, (float*)b, &m, &lapackStatus);
else if(typeid(fptype) == typeid(double))
dposv_(L, &m, &n, (double*)a, &lda, (double*)b, &m, &lapackStatus);
}
else
{
int ldb = (int)(b_step / sizeof(fptype));
fptype* tmpB = new fptype[m*n];
transpose(b, ldb, tmpB, m, m, n);
if(typeid(fptype) == typeid(float))
sposv_(L, &m, &n, (float*)a, &lda, (float*)tmpB, &m, &lapackStatus);
else if(typeid(fptype) == typeid(double))
dposv_(L, &m, &n, (double*)a, &lda, (double*)tmpB, &m, &lapackStatus);
transpose(tmpB, m, b, ldb, n, m);
delete[] tmpB;
}
}
else
{
if(typeid(fptype) == typeid(float))
spotrf_(L, &m, (float*)a, &lda, &lapackStatus);
else if(typeid(fptype) == typeid(double))
dpotrf_(L, &m, (double*)a, &lda, &lapackStatus);
}
if(lapackStatus == 0) *info = true;
else *info = false; //in opencv Cholesky function false means error
return CV_HAL_ERROR_OK;
}
template <typename fptype> static inline int
lapack_SVD(fptype* a, size_t a_step, fptype *w, fptype* u, size_t u_step, fptype* vt, size_t v_step, int m, int n, int flags, int* info)
{
int lda = (int)(a_step / sizeof(fptype));
int ldv = (int)(v_step / sizeof(fptype));
int ldu = (int)(u_step / sizeof(fptype));
int lwork = -1;
int* iworkBuf = new int[8*std::min(m, n)];
fptype work1 = 0;
//A already transposed and m>=n
char mode[] = { ' ', '\0'};
if(flags & CV_HAL_SVD_NO_UV)
{
ldv = 1;
mode[0] = 'N';
}
else if((flags & CV_HAL_SVD_SHORT_UV) && (flags & CV_HAL_SVD_MODIFY_A)) //short SVD, U stored in a
mode[0] = 'O';
else if((flags & CV_HAL_SVD_SHORT_UV) && !(flags & CV_HAL_SVD_MODIFY_A)) //short SVD, U stored in u if m>=n
mode[0] = 'S';
else if(flags & CV_HAL_SVD_FULL_UV) //full SVD, U stored in u or in a
mode[0] = 'A';
if((flags & CV_HAL_SVD_MODIFY_A) && (flags & CV_HAL_SVD_FULL_UV)) //U stored in a
{
u = new fptype[m*m];
ldu = m;
}
if(typeid(fptype) == typeid(float))
sgesdd_(mode, &m, &n, (float*)a, &lda, (float*)w, (float*)u, &ldu, (float*)vt, &ldv, (float*)&work1, &lwork, iworkBuf, info);
else if(typeid(fptype) == typeid(double))
dgesdd_(mode, &m, &n, (double*)a, &lda, (double*)w, (double*)u, &ldu, (double*)vt, &ldv, (double*)&work1, &lwork, iworkBuf, info);
lwork = (int)round(work1); //optimal buffer size
fptype* buffer = new fptype[lwork + 1];
if(typeid(fptype) == typeid(float))
sgesdd_(mode, &m, &n, (float*)a, &lda, (float*)w, (float*)u, &ldu, (float*)vt, &ldv, (float*)buffer, &lwork, iworkBuf, info);
else if(typeid(fptype) == typeid(double))
dgesdd_(mode, &m, &n, (double*)a, &lda, (double*)w, (double*)u, &ldu, (double*)vt, &ldv, (double*)buffer, &lwork, iworkBuf, info);
if(!(flags & CV_HAL_SVD_NO_UV))
transpose_square_inplace(vt, ldv, n);
if((flags & CV_HAL_SVD_MODIFY_A) && (flags & CV_HAL_SVD_FULL_UV))
{
for(int i = 0; i < m; i++)
for(int j = 0; j < m; j++)
a[i*lda + j] = u[i*m + j];
delete[] u;
}
delete[] iworkBuf;
delete[] buffer;
return CV_HAL_ERROR_OK;
}
template <typename fptype> static inline int
lapack_QR(fptype* a, size_t a_step, int m, int n, int k, fptype* b, size_t b_step, fptype* dst, int* info)
{
int lda = (int)(a_step / sizeof(fptype));
char mode[] = { 'N', '\0' };
if(m < n)
return CV_HAL_ERROR_NOT_IMPLEMENTED;
std::vector<fptype> tmpAMemHolder;
fptype* tmpA;
int ldtmpA;
if (m == n)
{
transpose_square_inplace(a, lda, m);
tmpA = a;
ldtmpA = lda;
}
else
{
tmpAMemHolder.resize(m*n);
tmpA = &tmpAMemHolder.front();
ldtmpA = m;
transpose(a, lda, tmpA, m, m, n);
}
int lwork = -1;
fptype work1 = 0.;
if (b)
{
if (k == 1 && b_step == sizeof(fptype))
{
if (typeid(fptype) == typeid(float))
sgels_(mode, &m, &n, &k, (float*)tmpA, &ldtmpA, (float*)b, &m, (float*)&work1, &lwork, info);
else if (typeid(fptype) == typeid(double))
dgels_(mode, &m, &n, &k, (double*)tmpA, &ldtmpA, (double*)b, &m, (double*)&work1, &lwork, info);
lwork = cvRound(work1); //optimal buffer size
std::vector<fptype> workBufMemHolder(lwork + 1);
fptype* buffer = &workBufMemHolder.front();
if (typeid(fptype) == typeid(float))
sgels_(mode, &m, &n, &k, (float*)tmpA, &ldtmpA, (float*)b, &m, (float*)buffer, &lwork, info);
else if (typeid(fptype) == typeid(double))
dgels_(mode, &m, &n, &k, (double*)tmpA, &ldtmpA, (double*)b, &m, (double*)buffer, &lwork, info);
}
else
{
std::vector<fptype> tmpBMemHolder(m*k);
fptype* tmpB = &tmpBMemHolder.front();
int ldb = (int)(b_step / sizeof(fptype));
transpose(b, ldb, tmpB, m, m, k);
if (typeid(fptype) == typeid(float))
sgels_(mode, &m, &n, &k, (float*)tmpA, &ldtmpA, (float*)tmpB, &m, (float*)&work1, &lwork, info);
else if (typeid(fptype) == typeid(double))
dgels_(mode, &m, &n, &k, (double*)tmpA, &ldtmpA, (double*)tmpB, &m, (double*)&work1, &lwork, info);
lwork = cvRound(work1); //optimal buffer size
std::vector<fptype> workBufMemHolder(lwork + 1);
fptype* buffer = &workBufMemHolder.front();
if (typeid(fptype) == typeid(float))
sgels_(mode, &m, &n, &k, (float*)tmpA, &ldtmpA, (float*)tmpB, &m, (float*)buffer, &lwork, info);
else if (typeid(fptype) == typeid(double))
dgels_(mode, &m, &n, &k, (double*)tmpA, &ldtmpA, (double*)tmpB, &m, (double*)buffer, &lwork, info);
transpose(tmpB, m, b, ldb, k, m);
}
}
else
{
if (typeid(fptype) == typeid(float))
sgeqrf_(&m, &n, (float*)tmpA, &ldtmpA, (float*)dst, (float*)&work1, &lwork, info);
else if (typeid(fptype) == typeid(double))
dgeqrf_(&m, &n, (double*)tmpA, &ldtmpA, (double*)dst, (double*)&work1, &lwork, info);
lwork = cvRound(work1); //optimal buffer size
std::vector<fptype> workBufMemHolder(lwork + 1);
fptype* buffer = &workBufMemHolder.front();
if (typeid(fptype) == typeid(float))
sgeqrf_(&m, &n, (float*)tmpA, &ldtmpA, (float*)dst, (float*)buffer, &lwork, info);
else if (typeid(fptype) == typeid(double))
dgeqrf_(&m, &n, (double*)tmpA, &ldtmpA, (double*)dst, (double*)buffer, &lwork, info);
}
if (m == n)
transpose_square_inplace(a, lda, m);
else
transpose(tmpA, m, a, lda, n, m);
if (*info != 0)
*info = 0;
else
*info = 1;
return CV_HAL_ERROR_OK;
}
template <typename fptype> static inline int
lapack_gemm(const fptype *src1, size_t src1_step, const fptype *src2, size_t src2_step, fptype alpha,
const fptype *src3, size_t src3_step, fptype beta, fptype *dst, size_t dst_step, int a_m, int a_n, int d_n, int flags)
{
int ldsrc1 = (int)(src1_step / sizeof(fptype));
int ldsrc2 = (int)(src2_step / sizeof(fptype));
int ldsrc3 = (int)(src3_step / sizeof(fptype));
int lddst = (int)(dst_step / sizeof(fptype));
int c_m, c_n, d_m;
CBLAS_TRANSPOSE transA, transB;
if(flags & CV_HAL_GEMM_2_T)
{
transB = CblasTrans;
if(flags & CV_HAL_GEMM_1_T )
{
d_m = a_n;
}
else
{
d_m = a_m;
}
}
else
{
transB = CblasNoTrans;
if(flags & CV_HAL_GEMM_1_T )
{
d_m = a_n;
}
else
{
d_m = a_m;
}
}
if(flags & CV_HAL_GEMM_3_T)
{
c_m = d_n;
c_n = d_m;
}
else
{
c_m = d_m;
c_n = d_n;
}
if(flags & CV_HAL_GEMM_1_T )
{
transA = CblasTrans;
std::swap(a_n, a_m);
}
else
{
transA = CblasNoTrans;
}
if(src3 != dst && beta != 0.0 && src3_step != 0) {
if(flags & CV_HAL_GEMM_3_T)
transpose(src3, ldsrc3, dst, lddst, c_m, c_n);
else
copy_matrix(src3, ldsrc3, dst, lddst, c_m, c_n);
}
else if (src3 == dst && (flags & CV_HAL_GEMM_3_T)) //actually transposing C in this case done by openCV
return CV_HAL_ERROR_NOT_IMPLEMENTED;
else if(src3_step == 0 && beta != 0.0)
set_value(dst, lddst, (fptype)0.0, d_m, d_n);
if(typeid(fptype) == typeid(float))
cblas_sgemm(CblasRowMajor, transA, transB, a_m, d_n, a_n, (float)alpha, (float*)src1, ldsrc1, (float*)src2, ldsrc2, (float)beta, (float*)dst, lddst);
else if(typeid(fptype) == typeid(double))
cblas_dgemm(CblasRowMajor, transA, transB, a_m, d_n, a_n, (double)alpha, (double*)src1, ldsrc1, (double*)src2, ldsrc2, (double)beta, (double*)dst, lddst);
return CV_HAL_ERROR_OK;
}
template <typename fptype> static inline int
lapack_gemm_c(const fptype *src1, size_t src1_step, const fptype *src2, size_t src2_step, fptype alpha,
const fptype *src3, size_t src3_step, fptype beta, fptype *dst, size_t dst_step, int a_m, int a_n, int d_n, int flags)
{
int ldsrc1 = (int)(src1_step / sizeof(std::complex<fptype>));
int ldsrc2 = (int)(src2_step / sizeof(std::complex<fptype>));
int ldsrc3 = (int)(src3_step / sizeof(std::complex<fptype>));
int lddst = (int)(dst_step / sizeof(std::complex<fptype>));
int c_m, c_n, d_m;
CBLAS_TRANSPOSE transA, transB;
std::complex<fptype> cAlpha(alpha, 0.0);
std::complex<fptype> cBeta(beta, 0.0);
if(flags & CV_HAL_GEMM_2_T)
{
transB = CblasTrans;
if(flags & CV_HAL_GEMM_1_T )
{
d_m = a_n;
}
else
{
d_m = a_m;
}
}
else
{
transB = CblasNoTrans;
if(flags & CV_HAL_GEMM_1_T )
{
d_m = a_n;
}
else
{
d_m = a_m;
}
}
if(flags & CV_HAL_GEMM_3_T)
{
c_m = d_n;
c_n = d_m;
}
else
{
c_m = d_m;
c_n = d_n;
}
if(flags & CV_HAL_GEMM_1_T )
{
transA = CblasTrans;
std::swap(a_n, a_m);
}
else
{
transA = CblasNoTrans;
}
if(src3 != dst && beta != 0.0 && src3_step != 0) {
if(flags & CV_HAL_GEMM_3_T)
transpose((std::complex<fptype>*)src3, ldsrc3, (std::complex<fptype>*)dst, lddst, c_m, c_n);
else
copy_matrix((std::complex<fptype>*)src3, ldsrc3, (std::complex<fptype>*)dst, lddst, c_m, c_n);
}
else if (src3 == dst && (flags & CV_HAL_GEMM_3_T)) //actually transposing C in this case done by openCV
return CV_HAL_ERROR_NOT_IMPLEMENTED;
else if(src3_step == 0 && beta != 0.0)
set_value((std::complex<fptype>*)dst, lddst, std::complex<fptype>(0.0, 0.0), d_m, d_n);
if(typeid(fptype) == typeid(float))
cblas_cgemm(CblasRowMajor, transA, transB, a_m, d_n, a_n, (float*)reinterpret_cast<fptype(&)[2]>(cAlpha), (float*)src1, ldsrc1, (float*)src2, ldsrc2, (float*)reinterpret_cast<fptype(&)[2]>(cBeta), (float*)dst, lddst);
else if(typeid(fptype) == typeid(double))
cblas_zgemm(CblasRowMajor, transA, transB, a_m, d_n, a_n, (double*)reinterpret_cast<fptype(&)[2]>(cAlpha), (double*)src1, ldsrc1, (double*)src2, ldsrc2, (double*)reinterpret_cast<fptype(&)[2]>(cBeta), (double*)dst, lddst);
return CV_HAL_ERROR_OK;
}
int lapack_LU32f(float* a, size_t a_step, int m, float* b, size_t b_step, int n, int* info)
{
if(m < HAL_LU_SMALL_MATRIX_THRESH)
return CV_HAL_ERROR_NOT_IMPLEMENTED;
return lapack_LU(a, a_step, m, b, b_step, n, info);
}
int lapack_LU64f(double* a, size_t a_step, int m, double* b, size_t b_step, int n, int* info)
{
if(m < HAL_LU_SMALL_MATRIX_THRESH)
return CV_HAL_ERROR_NOT_IMPLEMENTED;
return lapack_LU(a, a_step, m, b, b_step, n, info);
}
int lapack_Cholesky32f(float* a, size_t a_step, int m, float* b, size_t b_step, int n, bool *info)
{
if(m < HAL_CHOLESKY_SMALL_MATRIX_THRESH)
return CV_HAL_ERROR_NOT_IMPLEMENTED;
return lapack_Cholesky(a, a_step, m, b, b_step, n, info);
}
int lapack_Cholesky64f(double* a, size_t a_step, int m, double* b, size_t b_step, int n, bool *info)
{
if(m < HAL_CHOLESKY_SMALL_MATRIX_THRESH)
return CV_HAL_ERROR_NOT_IMPLEMENTED;
return lapack_Cholesky(a, a_step, m, b, b_step, n, info);
}
int lapack_SVD32f(float* a, size_t a_step, float *w, float* u, size_t u_step, float* vt, size_t v_step, int m, int n, int flags)
{
if(m < HAL_SVD_SMALL_MATRIX_THRESH)
return CV_HAL_ERROR_NOT_IMPLEMENTED;
int info;
return lapack_SVD(a, a_step, w, u, u_step, vt, v_step, m, n, flags, &info);
}
int lapack_SVD64f(double* a, size_t a_step, double *w, double* u, size_t u_step, double* vt, size_t v_step, int m, int n, int flags)
{
if(m < HAL_SVD_SMALL_MATRIX_THRESH)
return CV_HAL_ERROR_NOT_IMPLEMENTED;
int info;
return lapack_SVD(a, a_step, w, u, u_step, vt, v_step, m, n, flags, &info);
}
int lapack_QR32f(float* src1, size_t src1_step, int m, int n, int k, float* src2, size_t src2_step, float* dst, int* info)
{
if (m < HAL_QR_SMALL_MATRIX_THRESH)
return CV_HAL_ERROR_NOT_IMPLEMENTED;
return lapack_QR(src1, src1_step, m, n, k, src2, src2_step, dst, info);
}
int lapack_QR64f(double* src1, size_t src1_step, int m, int n, int k, double* src2, size_t src2_step, double* dst, int* info)
{
if (m < HAL_QR_SMALL_MATRIX_THRESH)
return CV_HAL_ERROR_NOT_IMPLEMENTED;
return lapack_QR(src1, src1_step, m, n, k, src2, src2_step, dst, info);
}
int lapack_gemm32f(const float *src1, size_t src1_step, const float *src2, size_t src2_step, float alpha,
const float *src3, size_t src3_step, float beta, float *dst, size_t dst_step, int m, int n, int k, int flags)
{
if(m < HAL_GEMM_SMALL_MATRIX_THRESH)
return CV_HAL_ERROR_NOT_IMPLEMENTED;
return lapack_gemm(src1, src1_step, src2, src2_step, alpha, src3, src3_step, beta, dst, dst_step, m, n, k, flags);
}
int lapack_gemm64f(const double *src1, size_t src1_step, const double *src2, size_t src2_step, double alpha,
const double *src3, size_t src3_step, double beta, double *dst, size_t dst_step, int m, int n, int k, int flags)
{
if(m < HAL_GEMM_SMALL_MATRIX_THRESH)
return CV_HAL_ERROR_NOT_IMPLEMENTED;
return lapack_gemm(src1, src1_step, src2, src2_step, alpha, src3, src3_step, beta, dst, dst_step, m, n, k, flags);
}
int lapack_gemm32fc(const float *src1, size_t src1_step, const float *src2, size_t src2_step, float alpha,
const float *src3, size_t src3_step, float beta, float *dst, size_t dst_step, int m, int n, int k, int flags)
{
if(m < HAL_GEMM_SMALL_COMPLEX_MATRIX_THRESH)
return CV_HAL_ERROR_NOT_IMPLEMENTED;
return lapack_gemm_c(src1, src1_step, src2, src2_step, alpha, src3, src3_step, beta, dst, dst_step, m, n, k, flags);
}
int lapack_gemm64fc(const double *src1, size_t src1_step, const double *src2, size_t src2_step, double alpha,
const double *src3, size_t src3_step, double beta, double *dst, size_t dst_step, int m, int n, int k, int flags)
{
if(m < HAL_GEMM_SMALL_COMPLEX_MATRIX_THRESH)
return CV_HAL_ERROR_NOT_IMPLEMENTED;
return lapack_gemm_c(src1, src1_step, src2, src2_step, alpha, src3, src3_step, beta, dst, dst_step, m, n, k, flags);
}
#endif //HAVE_LAPACK
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