$NetBSD$

Fix build with png-1.5.

--- lavtools/png2yuv.c.orig	2007-11-08 17:31:50.000000000 +0000
+++ lavtools/png2yuv.c
@@ -78,6 +78,8 @@ png_structp png_ptr;
 png_infop info_ptr, end_info;
 uint8_t *raw0, *raw1, *raw2;  /* buffer for RGB first, and then Y/Cb/Cr planes of decoded PNG */
 
+static int png_row_number = 0;
+
 /*
  * The User Interface parts 
  */
@@ -240,9 +242,13 @@ static void parse_commandline(int argc, 
     }
 }
 
+void read_row_callback(png_structp ptr, png_uint_32 row, int pass)
+{
+  png_row_number++;
+}
+
 void png_separation(png_structp png_ptr, png_row_infop row_info, png_bytep data)
 {
-  int row_nr = png_ptr->row_number; // internal variable ? 
   int i, width = row_info->width; 
   int new_width = sh_param->new_width;
 
@@ -256,28 +262,28 @@ void png_separation(png_structp png_ptr,
    */
 
   //mjpeg_debug("PNG YUV transformation callback; color_type is %d row_number %d\n", 
-  //	 row_info->color_type, row_nr);
+  //	 row_info->color_type, png_row_number);
 
   if(row_info->color_type == PNG_COLOR_TYPE_GRAY) // only Z available
     {
-      //mjpeg_debug("Grayscale to YUV, row %d", row_nr);
+      //mjpeg_debug("Grayscale to YUV, row %d", png_row_number);
       for (i = 0; i < width; i++)
 	{
-	  raw0[i + row_nr * new_width] = data[i];
-	  raw1[i + row_nr * new_width] = data[i];
-	  raw2[i + row_nr * new_width] = data[i];
+	  raw0[i + png_row_number * new_width] = data[i];
+	  raw1[i + png_row_number * new_width] = data[i];
+	  raw2[i + png_row_number * new_width] = data[i];
 	}
       return;
     }
 
   if(row_info->color_type == PNG_COLOR_TYPE_RGB) // Z and Alpha available
     {
-      //mjpeg_info("RGB to YUV, row %d", row_nr);
+      //mjpeg_info("RGB to YUV, row %d", png_row_number);
       for (i = 0; i < width; i++)
 	{
-	  raw0[i + row_nr * new_width] = data[i*3];
-	  raw1[i + row_nr * new_width] = data[i*3 + 1];
-	  raw2[i + row_nr * new_width] = data[i*3 + 2];
+	  raw0[i + png_row_number * new_width] = data[i*3];
+	  raw1[i + png_row_number * new_width] = data[i*3 + 1];
+	  raw2[i + png_row_number * new_width] = data[i*3 + 2];
 	}
       return;
     }
@@ -352,8 +358,10 @@ int decode_png(const char *pngname, int 
       return -1;
     }
   
-  if (process)
+  if (process) {
+    png_set_read_status_fn(png_ptr, read_row_callback);
     png_set_read_user_transform_fn(png_ptr, png_separation);
+  }
   png_read_png(png_ptr, info_ptr, PNG_TRANSFORM_STRIP_16 | PNG_TRANSFORM_STRIP_ALPHA, NULL);
   
   if (png_get_IHDR(png_ptr, info_ptr, &param->width, &param->height, &bit_depth,
@@ -402,7 +410,7 @@ int decode_png(const char *pngname, int 
     }
   png_read_end(png_ptr, info_ptr);
 #endif  
-  if (setjmp(png_ptr->jmpbuf)) {
+  if (setjmp(png_jmpbuf(png_ptr))) {
     png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
     return 2;
     }