fix cv crash (#7674)

Author: lxwlaq

lite/utils/cv/image_convert.cc

@@ -453,9 +453,11 @@ inline void nv12_to_bgr(const uint8_t* src, uint8_t* dst, int srcw, int srch) {
       g3 = g3 < 0 ? 0 : (g3 > 255) ? 255 : g3;
       b3 = b3 < 0 ? 0 : (b3 > 255) ? 255 : b3;
 
-      *ptr_bgr1++ = b1;
-      *ptr_bgr1++ = g1;
-      *ptr_bgr1++ = r1;
+      if (j + 1 < srcw) {
+        *ptr_bgr1++ = b1;
+        *ptr_bgr1++ = g1;
+        *ptr_bgr1++ = r1;
+      }
 
       *ptr_bgr2++ = b2;
       *ptr_bgr2++ = g2;
@@ -465,9 +467,11 @@ inline void nv12_to_bgr(const uint8_t* src, uint8_t* dst, int srcw, int srch) {
       ptr_y2 += 2;
       ptr_vu += 2;
 
-      *ptr_bgr2++ = b3;
-      *ptr_bgr2++ = g3;
-      *ptr_bgr2++ = r3;
+      if (j + 1 < srcw) {
+        *ptr_bgr2++ = b3;
+        *ptr_bgr2++ = g3;
+        *ptr_bgr2++ = r3;
+      }
     }
   }
   delete[] zerobuf;
@@ -788,9 +792,11 @@ inline void nv21_to_bgr(const uint8_t* src, uint8_t* dst, int srcw, int srch) {
       g3 = g3 < 0 ? 0 : (g3 > 255) ? 255 : g3;
       b3 = b3 < 0 ? 0 : (b3 > 255) ? 255 : b3;
 
-      *ptr_bgr1++ = b1;
-      *ptr_bgr1++ = g1;
-      *ptr_bgr1++ = r1;
+      if (j + 1 < srcw) {
+        *ptr_bgr1++ = b1;
+        *ptr_bgr1++ = g1;
+        *ptr_bgr1++ = r1;
+      }
 
       *ptr_bgr2++ = b2;
       *ptr_bgr2++ = g2;
@@ -800,9 +806,11 @@ inline void nv21_to_bgr(const uint8_t* src, uint8_t* dst, int srcw, int srch) {
       ptr_y2 += 2;
       ptr_vu += 2;
 
-      *ptr_bgr2++ = b3;
-      *ptr_bgr2++ = g3;
-      *ptr_bgr2++ = r3;
+      if (j + 1 < srcw) {
+        *ptr_bgr2++ = b3;
+        *ptr_bgr2++ = g3;
+        *ptr_bgr2++ = r3;
+      }
     }
   }
   delete[] zerobuf;
@@ -1128,10 +1136,12 @@ inline void nv12_to_bgra(const uint8_t* src, uint8_t* dst, int srcw, int srch) {
       g3 = g3 < 0 ? 0 : (g3 > 255) ? 255 : g3;
       b3 = b3 < 0 ? 0 : (b3 > 255) ? 255 : b3;
 
-      *ptr_bgr1++ = b1;
-      *ptr_bgr1++ = g1;
-      *ptr_bgr1++ = r1;
-      *ptr_bgr1++ = 255;
+      if (j + 1 < srcw) {
+        *ptr_bgr1++ = b1;
+        *ptr_bgr1++ = g1;
+        *ptr_bgr1++ = r1;
+        *ptr_bgr1++ = 255;
+      }
 
       *ptr_bgr2++ = b2;
       *ptr_bgr2++ = g2;
@@ -1142,10 +1152,12 @@ inline void nv12_to_bgra(const uint8_t* src, uint8_t* dst, int srcw, int srch) {
       ptr_y2 += 2;
       ptr_vu += 2;
 
-      *ptr_bgr2++ = b3;
-      *ptr_bgr2++ = g3;
-      *ptr_bgr2++ = r3;
-      *ptr_bgr2++ = 255;
+      if (j + 1 < srcw) {
+        *ptr_bgr2++ = b3;
+        *ptr_bgr2++ = g3;
+        *ptr_bgr2++ = r3;
+        *ptr_bgr2++ = 255;
+      }
     }
   }
   delete[] zerobuf;
@@ -1471,10 +1483,12 @@ inline void nv21_to_bgra(const uint8_t* src, uint8_t* dst, int srcw, int srch) {
       g3 = g3 < 0 ? 0 : (g3 > 255) ? 255 : g3;
       b3 = b3 < 0 ? 0 : (b3 > 255) ? 255 : b3;
 
-      *ptr_bgr1++ = b1;
-      *ptr_bgr1++ = g1;
-      *ptr_bgr1++ = r1;
-      *ptr_bgr1++ = 255;
+      if (j + 1 < srcw) {
+        *ptr_bgr1++ = b1;
+        *ptr_bgr1++ = g1;
+        *ptr_bgr1++ = r1;
+        *ptr_bgr1++ = 255;
+      }
 
       *ptr_bgr2++ = b2;
       *ptr_bgr2++ = g2;
@@ -1485,10 +1499,12 @@ inline void nv21_to_bgra(const uint8_t* src, uint8_t* dst, int srcw, int srch) {
       ptr_y2 += 2;
       ptr_vu += 2;
 
-      *ptr_bgr2++ = b3;
-      *ptr_bgr2++ = g3;
-      *ptr_bgr2++ = r3;
-      *ptr_bgr2++ = 255;
+      if (j + 1 < srcw) {
+        *ptr_bgr2++ = b3;
+        *ptr_bgr2++ = g3;
+        *ptr_bgr2++ = r3;
+        *ptr_bgr2++ = 255;
+      }
     }
   }
   delete[] zerobuf;