1 files changed, 50 insertions, 0 deletions
diff --git a/media/libvpx/vp9/common/vp9_filter.h b/media/libvpx/vp9/common/vp9_filter.h
new file mode 100644
index 000000000..808a270fa
--- /dev/null
+++ b/media/libvpx/vp9/common/vp9_filter.h
@@ -0,0 +1,50 @@
+/*
+ *  Copyright (c) 2011 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef VP9_COMMON_VP9_FILTER_H_
+#define VP9_COMMON_VP9_FILTER_H_
+
+#include "./vpx_config.h"
+#include "vpx/vpx_integer.h"
+#include "vpx_ports/mem.h"
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define FILTER_BITS 7
+
+#define SUBPEL_BITS 4
+#define SUBPEL_MASK ((1 << SUBPEL_BITS) - 1)
+#define SUBPEL_SHIFTS (1 << SUBPEL_BITS)
+#define SUBPEL_TAPS 8
+
+typedef enum {
+  EIGHTTAP = 0,
+  EIGHTTAP_SMOOTH = 1,
+  EIGHTTAP_SHARP = 2,
+  SWITCHABLE_FILTERS = 3, /* Number of switchable filters */
+  BILINEAR = 3,
+  // The codec can operate in four possible inter prediction filter mode:
+  // 8-tap, 8-tap-smooth, 8-tap-sharp, and switching between the three.
+  SWITCHABLE_FILTER_CONTEXTS = SWITCHABLE_FILTERS + 1,
+  SWITCHABLE = 4  /* should be the last one */
+} INTERP_FILTER;
+
+typedef int16_t InterpKernel[SUBPEL_TAPS];
+
+const InterpKernel *vp9_get_interp_kernel(INTERP_FILTER filter);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // VP9_COMMON_VP9_FILTER_H_