1 files changed, 111 insertions, 0 deletions
diff --git a/third_party/aom/av1/common/filter.h b/third_party/aom/av1/common/filter.h
new file mode 100644
index 000000000..693a46902
--- /dev/null
+++ b/third_party/aom/av1/common/filter.h
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AV1_COMMON_FILTER_H_
+#define AV1_COMMON_FILTER_H_
+
+#include "./aom_config.h"
+#include "aom/aom_integer.h"
+#include "aom_dsp/aom_filter.h"
+#include "aom_ports/mem.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define USE_TEMPORALFILTER_12TAP 1
+#define MAX_FILTER_TAP 12
+
+#define USE_12TAP_FILTER 0
+
+typedef enum {
+  EIGHTTAP_REGULAR,
+  EIGHTTAP_SMOOTH,
+  MULTITAP_SHARP,
+#if CONFIG_DUAL_FILTER
+  EIGHTTAP_SMOOTH2,
+#endif  // CONFIG_DUAL_FILTER
+  BILINEAR,
+#if CONFIG_DUAL_FILTER
+  EIGHTTAP_SHARP,
+  FILTER_REGULAR_UV,
+  FILTER_SMOOTH_UV,
+  FILTER_SHARP_UV,
+  FILTER_SMOOTH2_UV,
+#endif  // CONFIG_DUAL_FILTER
+  INTERP_FILTERS_ALL,
+  SWITCHABLE_FILTERS = BILINEAR,
+  SWITCHABLE = SWITCHABLE_FILTERS + 1, /* the last switchable one */
+  EXTRA_FILTERS = INTERP_FILTERS_ALL - SWITCHABLE_FILTERS,
+#if USE_TEMPORALFILTER_12TAP
+  TEMPORALFILTER_12TAP = SWITCHABLE_FILTERS + EXTRA_FILTERS,
+#endif
+} InterpFilter;
+
+#if CONFIG_DUAL_FILTER
+#define MAX_SUBPEL_TAPS 12
+#define LOG_SWITCHABLE_FILTERS \
+  3 /* (1 << LOG_SWITCHABLE_FILTERS) > SWITCHABLE_FILTERS */
+#define SWITCHABLE_FILTER_CONTEXTS ((SWITCHABLE_FILTERS + 1) * 4)
+#define INTER_FILTER_COMP_OFFSET (SWITCHABLE_FILTERS + 1)
+#define INTER_FILTER_DIR_OFFSET ((SWITCHABLE_FILTERS + 1) * 2)
+#else  // CONFIG_DUAL_FILTER
+#define LOG_SWITCHABLE_FILTERS \
+  2 /* (1 << LOG_SWITCHABLE_FILTERS) > SWITCHABLE_FILTERS */
+#define SWITCHABLE_FILTER_CONTEXTS (SWITCHABLE_FILTERS + 1)
+#endif  // CONFIG_DUAL_FILTER
+
+#if CONFIG_EXT_INTRA
+#if CONFIG_INTRA_INTERP
+typedef enum {
+  INTRA_FILTER_LINEAR,
+  INTRA_FILTER_8TAP,
+  INTRA_FILTER_8TAP_SHARP,
+  INTRA_FILTER_8TAP_SMOOTH,
+  INTRA_FILTERS,
+} INTRA_FILTER;
+
+extern const InterpKernel *av1_intra_filter_kernels[INTRA_FILTERS];
+#endif  // CONFIG_INTRA_INTERP
+#endif  // CONFIG_EXT_INTRA
+
+typedef struct InterpFilterParams {
+  const int16_t *filter_ptr;
+  uint16_t taps;
+  uint16_t subpel_shifts;
+  InterpFilter interp_filter;
+} InterpFilterParams;
+
+InterpFilterParams av1_get_interp_filter_params(
+    const InterpFilter interp_filter);
+
+const int16_t *av1_get_interp_filter_kernel(const InterpFilter interp_filter);
+
+static INLINE const int16_t *av1_get_interp_filter_subpel_kernel(
+    const InterpFilterParams filter_params, const int subpel) {
+  return filter_params.filter_ptr + filter_params.taps * subpel;
+}
+
+static INLINE int av1_is_interpolating_filter(
+    const InterpFilter interp_filter) {
+  const InterpFilterParams ip = av1_get_interp_filter_params(interp_filter);
+  return (ip.filter_ptr[ip.taps / 2 - 1] == 128);
+}
+
+#if CONFIG_DUAL_FILTER
+InterpFilter av1_get_plane_interp_filter(InterpFilter interp_filter, int plane);
+#endif
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // AV1_COMMON_FILTER_H_