libvpx: Add VP9 decoder.

source/libvpx/vp9/common/vp9_pred_common.h

+/*
+ *  Copyright (c) 2012 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.
+ */
+
+#include "vp9/common/vp9_type_aliases.h"
+#include "vp9/common/vp9_onyxc_int.h"
+#include "vp9/common/vp9_blockd.h"
+
+#ifndef VP9_COMMON_VP9_PRED_COMMON_H_
+#define VP9_COMMON_VP9_PRED_COMMON_H_
+
+
+// Predicted items
+typedef enum {
+  PRED_SEG_ID = 0,               // Segment identifier
+  PRED_REF = 1,
+  PRED_COMP = 2,
+  PRED_MBSKIP = 3,
+  PRED_SWITCHABLE_INTERP = 4
+} PRED_ID;
+
+extern unsigned char vp9_get_pred_context(const VP9_COMMON *const cm,
+                                          const MACROBLOCKD *const xd,
+                                          PRED_ID pred_id);
+
+extern vp9_prob vp9_get_pred_prob(const VP9_COMMON *const cm,
+                                  const MACROBLOCKD *const xd,
+                                  PRED_ID pred_id);
+
+extern const vp9_prob *vp9_get_pred_probs(const VP9_COMMON *const cm,
+                                          const MACROBLOCKD *const xd,
+                                          PRED_ID pred_id);
+
+extern unsigned char vp9_get_pred_flag(const MACROBLOCKD *const xd,
+                                       PRED_ID pred_id);
+
+extern void vp9_set_pred_flag(MACROBLOCKD *const xd,
+                              PRED_ID pred_id,
+                              unsigned char pred_flag);
+
+
+extern unsigned char vp9_get_pred_mb_segid(const VP9_COMMON *const cm,
+                                           const MACROBLOCKD *const xd,
+                                           int MbIndex);
+
+extern MV_REFERENCE_FRAME vp9_get_pred_ref(const VP9_COMMON *const cm,
+                                       const MACROBLOCKD *const xd);
+extern void vp9_compute_mod_refprobs(VP9_COMMON *const cm);
+
+#endif /* __INC_PRED_COMMON_H__ */