Index: third_party/libwebp/utils/filters.h |
diff --git a/third_party/libwebp/utils/filters.h b/third_party/libwebp/utils/filters.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..c5cdbd6deb84778f489ba069fd7780602d2df841 |
--- /dev/null |
+++ b/third_party/libwebp/utils/filters.h |
@@ -0,0 +1,54 @@ |
+// Copyright 2011 Google Inc. All Rights Reserved. |
+// |
+// This code is licensed under the same terms as WebM: |
+// Software License Agreement: http://www.webmproject.org/license/software/ |
+// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ |
+// ----------------------------------------------------------------------------- |
+// |
+// Spatial prediction using various filters |
+// |
+// Author: Urvang (urvang@google.com) |
+ |
+#ifndef WEBP_UTILS_FILTERS_H_ |
+#define WEBP_UTILS_FILTERS_H_ |
+ |
+#include "../webp/types.h" |
+ |
+#if defined(__cplusplus) || defined(c_plusplus) |
+extern "C" { |
+#endif |
+ |
+// Filters. |
+typedef enum { |
+ WEBP_FILTER_NONE = 0, |
+ WEBP_FILTER_HORIZONTAL, |
+ WEBP_FILTER_VERTICAL, |
+ WEBP_FILTER_GRADIENT, |
+ WEBP_FILTER_LAST = WEBP_FILTER_GRADIENT + 1, // end marker |
+ WEBP_FILTER_BEST, |
+ WEBP_FILTER_FAST |
+} WEBP_FILTER_TYPE; |
+ |
+typedef void (*WebPFilterFunc)(const uint8_t* in, int width, int height, |
+ int bpp, int stride, uint8_t* out); |
+ |
+// Filter the given data using the given predictor. |
+// 'in' corresponds to a 2-dimensional pixel array of size (stride * height) |
+// in raster order. |
+// 'bpp' is number of bytes per pixel, and |
+// 'stride' is number of bytes per scan line (with possible padding). |
+// 'out' should be pre-allocated. |
+extern const WebPFilterFunc WebPFilters[WEBP_FILTER_LAST]; |
+ |
+// Reconstruct the original data from the given filtered data. |
+extern const WebPFilterFunc WebPUnfilters[WEBP_FILTER_LAST]; |
+ |
+// Fast estimate of a potentially good filter. |
+extern WEBP_FILTER_TYPE EstimateBestFilter(const uint8_t* data, |
+ int width, int height, int stride); |
+ |
+#if defined(__cplusplus) || defined(c_plusplus) |
+} // extern "C" |
+#endif |
+ |
+#endif /* WEBP_UTILS_FILTERS_H_ */ |