header for swscale.c

git-svn-id: file:///var/local/repositories/mplayer/trunk/postproc@2218 b3059339-0415-0410-9bf9-f77b7e298cf2

swscale.h

+
+// *** bilinear scaling and yuv->rgb conversion of yv12 slices:
+// *** Note: it's called multiple times while decoding a frame, first time y==0
+// *** Designed to upscale, but may work for downscale too.
+// s_xinc = (src_width << 8) / dst_width
+// s_yinc = (src_height << 16) / dst_height
+void SwScale_YV12slice_brg24(unsigned char* srcptr[],int stride[], int y, int h,
+			     unsigned char* dstptr, int dststride, int dstw, int dstbpp,
+			     unsigned int s_xinc,unsigned int s_yinc);
+
+// generating tables
+void SwScale_Init();