#973: if the input height is odd, libyuv will round up, we round down…

….. so we need more padding

git-svn-id: https://xpra.org/svn/Xpra/trunk@12303 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/xpra/codecs/csc_libyuv/colorspace_converter.pyx

@@ -210,10 +210,11 @@ cdef class ColorspaceConverter:
             self.out_stride[i]  = roundup(self.out_width[i], MEMALIGN_ALIGNMENT)
             self.out_size[i]    = self.out_stride[i] * self.out_height[i]
             self.out_offsets[i] = self.out_buffer_size
-            #add one extra line to height so we can access a full rowstride at a time,
+            #add two extra lines to height so we can access two rowstrides at a time,
             #no matter where we start to read on the last line
             #and round up to memalign each plane:
-            self.out_buffer_size += roundupl(self.out_size[i] + self.out_stride[i], MEMALIGN_ALIGNMENT)
+            #(why two and not just one? libyuv will do this for input data with odd height)
+            self.out_buffer_size += roundupl(self.out_size[i] + 2*self.out_stride[i], MEMALIGN_ALIGNMENT)
             if self.scaling:
                 self.scaled_width[i]    = dst_width // xdiv
                 self.scaled_height[i]   = dst_height // ydiv