From 5ca3d855a2639d2ca8d39e6fb804f1c10803d3c8 Mon Sep 17 00:00:00 2001
From: Ilya Lavrenov <ilya.lavrenov@itseez.com>
Date: Sun, 13 Apr 2014 16:14:04 +0400
Subject: [PATCH] cv::transpose inplace

---
 modules/core/src/matrix.cpp | 67 +++++++++++++++++++++++++++----------
 1 file changed, 49 insertions(+), 18 deletions(-)

diff --git a/modules/core/src/matrix.cpp b/modules/core/src/matrix.cpp
index 5b39a21c62..9b4d859e9f 100644
--- a/modules/core/src/matrix.cpp
+++ b/modules/core/src/matrix.cpp
@@ -3019,24 +3019,50 @@ void cv::transpose( InputArray _src, OutputArray _dst )
         return;
     }
 
-#if defined(HAVE_IPP) && !defined(HAVE_IPP_ICV_ONLY)
+#if defined HAVE_IPP && !defined HAVE_IPP_ICV_ONLY
     typedef IppStatus (CV_STDCALL * ippiTranspose)(const void * pSrc, int srcStep, void * pDst, int dstStep, IppiSize roiSize);
-    ippiTranspose ippFunc =
-    type == CV_8UC1 ? (ippiTranspose)ippiTranspose_8u_C1R :
-    type == CV_8UC3 ? (ippiTranspose)ippiTranspose_8u_C3R :
-    type == CV_8UC4 ? (ippiTranspose)ippiTranspose_8u_C4R :
-    type == CV_16UC1 ? (ippiTranspose)ippiTranspose_16u_C1R :
-    type == CV_16UC3 ? (ippiTranspose)ippiTranspose_16u_C3R :
-    type == CV_16UC4 ? (ippiTranspose)ippiTranspose_16u_C4R :
-    type == CV_16SC1 ? (ippiTranspose)ippiTranspose_16s_C1R :
-    type == CV_16SC3 ? (ippiTranspose)ippiTranspose_16s_C3R :
-    type == CV_16SC4 ? (ippiTranspose)ippiTranspose_16s_C4R :
-    type == CV_32SC1 ? (ippiTranspose)ippiTranspose_32s_C1R :
-    type == CV_32SC3 ? (ippiTranspose)ippiTranspose_32s_C3R :
-    type == CV_32SC4 ? (ippiTranspose)ippiTranspose_32s_C4R :
-    type == CV_32FC1 ? (ippiTranspose)ippiTranspose_32f_C1R :
-    type == CV_32FC3 ? (ippiTranspose)ippiTranspose_32f_C3R :
-    type == CV_32FC4 ? (ippiTranspose)ippiTranspose_32f_C4R : 0;
+    typedef IppStatus (CV_STDCALL * ippiTransposeI)(const void * pSrcDst, int srcDstStep, IppiSize roiSize);
+    ippiTranspose ippFunc = 0;
+    ippiTransposeI ippFuncI = 0;
+
+    if (dst.data == src.data && dst.cols == dst.rows)
+    {
+        ippFuncI =
+            type == CV_8UC1 ? (ippiTransposeI)ippiTranspose_8u_C1IR :
+            type == CV_8UC3 ? (ippiTransposeI)ippiTranspose_8u_C3IR :
+            type == CV_8UC4 ? (ippiTransposeI)ippiTranspose_8u_C4IR :
+            type == CV_16UC1 ? (ippiTransposeI)ippiTranspose_16u_C1IR :
+            type == CV_16UC3 ? (ippiTransposeI)ippiTranspose_16u_C3IR :
+            type == CV_16UC4 ? (ippiTransposeI)ippiTranspose_16u_C4IR :
+            type == CV_16SC1 ? (ippiTransposeI)ippiTranspose_16s_C1IR :
+            type == CV_16SC3 ? (ippiTransposeI)ippiTranspose_16s_C3IR :
+            type == CV_16SC4 ? (ippiTransposeI)ippiTranspose_16s_C4IR :
+            type == CV_32SC1 ? (ippiTransposeI)ippiTranspose_32s_C1IR :
+            type == CV_32SC3 ? (ippiTransposeI)ippiTranspose_32s_C3IR :
+            type == CV_32SC4 ? (ippiTransposeI)ippiTranspose_32s_C4IR :
+            type == CV_32FC1 ? (ippiTransposeI)ippiTranspose_32f_C1IR :
+            type == CV_32FC3 ? (ippiTransposeI)ippiTranspose_32f_C3IR :
+            type == CV_32FC4 ? (ippiTransposeI)ippiTranspose_32f_C4IR : 0;
+    }
+    else
+    {
+        ippFunc =
+            type == CV_8UC1 ? (ippiTranspose)ippiTranspose_8u_C1R :
+            type == CV_8UC3 ? (ippiTranspose)ippiTranspose_8u_C3R :
+            type == CV_8UC4 ? (ippiTranspose)ippiTranspose_8u_C4R :
+            type == CV_16UC1 ? (ippiTranspose)ippiTranspose_16u_C1R :
+            type == CV_16UC3 ? (ippiTranspose)ippiTranspose_16u_C3R :
+            type == CV_16UC4 ? (ippiTranspose)ippiTranspose_16u_C4R :
+            type == CV_16SC1 ? (ippiTranspose)ippiTranspose_16s_C1R :
+            type == CV_16SC3 ? (ippiTranspose)ippiTranspose_16s_C3R :
+            type == CV_16SC4 ? (ippiTranspose)ippiTranspose_16s_C4R :
+            type == CV_32SC1 ? (ippiTranspose)ippiTranspose_32s_C1R :
+            type == CV_32SC3 ? (ippiTranspose)ippiTranspose_32s_C3R :
+            type == CV_32SC4 ? (ippiTranspose)ippiTranspose_32s_C4R :
+            type == CV_32FC1 ? (ippiTranspose)ippiTranspose_32f_C1R :
+            type == CV_32FC3 ? (ippiTranspose)ippiTranspose_32f_C3R :
+            type == CV_32FC4 ? (ippiTranspose)ippiTranspose_32f_C4R : 0;
+    }
 
     IppiSize roiSize = { src.cols, src.rows };
     if (ippFunc != 0)
@@ -3045,7 +3071,12 @@ void cv::transpose( InputArray _src, OutputArray _dst )
             return;
         setIppErrorStatus();
     }
-#endif
+    else if (ippFuncI != 0)
+    {
+        if (ippFuncI(dst.data, (int)dst.step, roiSize) >= 0)
+            return;
+        setIppErrorStatus();
+    }
 
     if( dst.data == src.data )
     {