Small changes in XML parser:

[libucw.git] / images / dup-cmp.c

diff --git a/images/dup-cmp.c b/images/dup-cmp.c
index 1bee7fa4f1c7c586923702536430747fb2272321..b71feaef9fa871fc4e4ff8675b593e956e9604ea 100644 (file)
--- a/images/dup-cmp.c
+++ b/images/dup-cmp.c
@@ -17,9 +17,6 @@
 
 #include <fcntl.h>
 
-static uns image_dup_ratio_threshold = 140;
-static uns image_dup_error_threshold = 100;
-
 static inline uns
 err (int a, int b)
 {
@@ -68,18 +65,18 @@ err_sum_transformed(byte *pos1, byte *pos2, uns cols, uns rows, int row_step_1,
 }
 
 static inline int
-aspect_ratio_test(uns cols1, uns rows1, uns cols2, uns rows2)
+aspect_ratio_test(struct image_dup_context *ctx, uns cols1, uns rows1, uns cols2, uns rows2)
 {
   DBG("aspect_ratio_test(cols1=%u rows1=%u cols2=%u rows2=%u)", cols1, rows1, cols2, rows2);
   uns r1 = cols1 * rows2;
   uns r2 = rows1 * cols2;
   return
-    r1 <= ((r2 * image_dup_ratio_threshold) >> 7) &&
-    r2 <= ((r1 * image_dup_ratio_threshold) >> 7);
+    r1 <= ((r2 * ctx->ratio_threshold) >> 7) &&
+    r2 <= ((r1 * ctx->ratio_threshold) >> 7);
 }
 
 static inline int
-average_compare(struct image_dup *dup1, struct image_dup *dup2)
+average_compare(struct image_dup_context *ctx, struct image_dup *dup1, struct image_dup *dup2)
 {
   byte *block1 = image_dup_block(dup1, 0, 0);
   byte *block2 = image_dup_block(dup2, 0, 0);
@@ -87,13 +84,14 @@ average_compare(struct image_dup *dup1, struct image_dup *dup2)
     err(block1[0], block2[0]) +
     err(block1[1], block2[1]) +
     err(block1[2], block2[2]);
-  return e <= image_dup_error_threshold;
+  return e <= ctx->error_threshold;
 }
 
 static int
-blocks_compare(struct image_dup *dup1, struct image_dup *dup2, uns tab_col, uns tab_row, uns trans)
+blocks_compare(struct image_dup_context *ctx, struct image_dup *dup1, struct image_dup *dup2, uns tab_col, uns tab_row, uns trans)
 {
   DBG("blocks_compare(tab_col=%d tab_row=%d trans=%d)", tab_col, tab_row, trans);
+  ctx->sum_pixels += 1 << (tab_col + tab_row);
   byte *block1 = image_dup_block(dup1, tab_col, tab_row);
   byte *block2;
   int col_step, row_step;
@@ -106,7 +104,8 @@ blocks_compare(struct image_dup *dup1, struct image_dup *dup2, uns tab_col, uns
       case 0: ;
        uns err = (err_sum(block1, block2, 1 << (tab_col + tab_row)) >> (tab_col + tab_row));
        DBG("average error=%d", err);
-       return err <= image_dup_error_threshold;
+       ctx->error = err;
+       return err <= ctx->error_threshold;
       case 1:
        col_step = -3;
        row_step = (3 << tab_col);
@@ -146,14 +145,18 @@ blocks_compare(struct image_dup *dup1, struct image_dup *dup2, uns tab_col, uns
     }
   uns err = (err_sum_transformed(block1, block2, (1 << tab_col), (1 << tab_row), (3 << tab_col), col_step, row_step) >> (tab_col + tab_row));
   DBG("average error=%d", err);
-  return err <= image_dup_error_threshold;
+  ctx->error = err;
+  return err <= ctx->error_threshold;
 }
 
 static int
-same_size_compare(struct image_dup *dup1, struct image_dup *dup2, uns trans)
+same_size_compare(struct image_dup_context *ctx, struct image_dup *dup1, struct image_dup *dup2, uns trans)
 {
-  struct image *img1 = dup1->image;
-  struct image *img2 = dup2->image;
+  struct image *img1 = &dup1->image;
+  struct image *img2 = &dup2->image;
+  if (!img1->pixels || !img2->pixels)
+    return 1;
+  ctx->sum_pixels += img1->cols * img1->rows;
   byte *block1 = img1->pixels;
   byte *block2 = img2->pixels;
   int col_step, row_step;
@@ -203,23 +206,25 @@ same_size_compare(struct image_dup *dup1, struct image_dup *dup2, uns trans)
     }
   uns err = (err_sum_transformed(block1, block2, img1->cols, img1->rows, img1->row_size, col_step, row_step) / ((u64)img1->cols * img1->rows));
   DBG("average error=%d", err);
-  return err <= image_dup_error_threshold;
+  ctx->error = err;
+  return err <= ctx->error_threshold;
 }
 
 uns
-image_dup_compare(struct image_dup *dup1, struct image_dup *dup2, uns flags)
+image_dup_compare(struct image_dup_context *ctx, struct image_dup *dup1, struct image_dup *dup2)
 {
-  DBG("image_dup_compare()");
-  if (!average_compare(dup1, dup2))
+  DBG("image_dup_compare(%p, %p)", dup1, dup2);
+  if (!average_compare(ctx, dup1, dup2))
     return 0;
-  struct image *img1 = dup1->image;
-  struct image *img2 = dup2->image;
+  struct image *img1 = &dup1->image;
+  struct image *img2 = &dup2->image;
+  uns flags = ctx->flags;
   if (flags & IMAGE_DUP_SCALE)
     {
       DBG("Scale support");
-      if (!aspect_ratio_test(img1->cols, img1->rows, img2->cols, img2->rows))
+      if (!aspect_ratio_test(ctx, img1->cols, img1->rows, img2->cols, img2->rows))
        flags &= ~0x0f;
-      if (!aspect_ratio_test(img1->cols, img1->rows, img2->rows, img2->cols))
+      if (!aspect_ratio_test(ctx, img1->cols, img1->rows, img2->rows, img2->cols))
        flags &= ~0xf0;
     }
   else
@@ -241,15 +246,17 @@ image_dup_compare(struct image_dup *dup1, struct image_dup *dup2, uns flags)
        if (flags & (1 << t))
          {
            DBG("Testing trans %d", t);
-            for (uns i = MAX(cols, rows); i--; )
+           uns i = MAX(cols, rows), depth = 1;
+            while (i--)
               {
+               depth++;
                uns col = MAX(0, (int)(cols - i));
                uns row = MAX(0, (int)(rows - i));
-               if (!blocks_compare(dup1, dup2, col, row, t))
+               if (!blocks_compare(ctx, dup1, dup2, col, row, t))
                  break;
                if (!i &&
                    (img1->cols != img2->cols || img1->rows != img2->rows ||
-                   same_size_compare(dup1, dup2, t)))
+                   same_size_compare(ctx, dup1, dup2, t)))
                  {
                    result |= 1 << t;
                    if (!(flags & IMAGE_DUP_WANT_ALL))
@@ -258,6 +265,7 @@ image_dup_compare(struct image_dup *dup1, struct image_dup *dup2, uns flags)
                      break;
                  }
              }
+           ctx->sum_depth += depth;
          }
     }
   if (flags & 0xf0)
@@ -268,15 +276,17 @@ image_dup_compare(struct image_dup *dup1, struct image_dup *dup2, uns flags)
        if (flags & (1 << t))
          {
            DBG("Testing trans %d", t);
-            for (uns i = MAX(cols, rows); i--; )
+           uns i = MAX(cols, rows), depth = 1;
+            while (i--)
               {
+               depth++;
                uns col = MAX(0, (int)(cols - i));
                uns row = MAX(0, (int)(rows - i));
-               if (!blocks_compare(dup1, dup2, col, row, t))
+               if (!blocks_compare(ctx, dup1, dup2, col, row, t))
                  break;
                if (!i &&
                    (img1->cols != img2->rows || img1->rows != img2->cols ||
-                   same_size_compare(dup1, dup2, t)) )
+                   same_size_compare(ctx, dup1, dup2, t)) )
                  {
                    result |= 1 << t;
                    if (!(flags & IMAGE_DUP_WANT_ALL))
@@ -285,6 +295,7 @@ image_dup_compare(struct image_dup *dup1, struct image_dup *dup2, uns flags)
                      break;
                  }
              }
+           ctx->sum_depth += depth;
          }
     }
   return result;