1 files changed, 48 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx_dsp/vpx_filter.h b/media/libvpx/libvpx/vpx_dsp/vpx_filter.h
new file mode 100644
index 0000000000..0cddcb6991
--- /dev/null
+++ b/media/libvpx/libvpx/vpx_dsp/vpx_filter.h
@@ -0,0 +1,48 @@
+/*
+ *  Copyright (c) 2015 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 VPX_VPX_DSP_VPX_FILTER_H_
+#define VPX_VPX_DSP_VPX_FILTER_H_
+
+#include <assert.h>
+#include "vpx/vpx_integer.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 int16_t InterpKernel[SUBPEL_TAPS];
+
+static INLINE int vpx_get_filter_taps(const int16_t *const filter) {
+  assert(filter[3] != 128);
+  if (filter[0] | filter[7]) {
+    return 8;
+  }
+  if (filter[1] | filter[6]) {
+    return 6;
+  }
+  if (filter[2] | filter[5]) {
+    return 4;
+  }
+  return 2;
+}
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // VPX_VPX_DSP_VPX_FILTER_H_