libvpx: Add VP9 decoder.

source/libvpx/vp9/encoder/vp9_tokenize.h

+/*
+ *  Copyright (c) 2010 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_ENCODER_VP9_TOKENIZE_H_
+#define VP9_ENCODER_VP9_TOKENIZE_H_
+
+#include "vp9/common/vp9_entropy.h"
+#include "vp9/encoder/vp9_block.h"
+
+void vp9_tokenize_initialize();
+
+typedef struct {
+  short Token;
+  short Extra;
+} TOKENVALUE;
+
+typedef struct {
+  const vp9_prob *context_tree;
+  short           Extra;
+  unsigned char   Token;
+  unsigned char   skip_eob_node;
+} TOKENEXTRA;
+
+extern int vp9_mby_is_skippable_4x4(MACROBLOCKD *xd, int has_y2_block);
+extern int vp9_mbuv_is_skippable_4x4(MACROBLOCKD *xd);
+extern int vp9_mby_is_skippable_8x8(MACROBLOCKD *xd, int has_y2_block);
+extern int vp9_mbuv_is_skippable_8x8(MACROBLOCKD *xd);
+extern int vp9_mby_is_skippable_16x16(MACROBLOCKD *xd);
+
+struct VP9_COMP;
+
+extern void vp9_tokenize_mb(struct VP9_COMP *cpi, MACROBLOCKD *xd,
+                            TOKENEXTRA **t, int dry_run);
+
+extern void vp9_stuff_mb(struct VP9_COMP *cpi, MACROBLOCKD *xd,
+                         TOKENEXTRA **t, int dry_run);
+
+extern void vp9_fix_contexts(MACROBLOCKD *xd);
+
+#ifdef ENTROPY_STATS
+void init_context_counters();
+void print_context_counters();
+
+extern INT64 context_counters[BLOCK_TYPES][COEF_BANDS]
+                             [PREV_COEF_CONTEXTS][MAX_ENTROPY_TOKENS];
+extern INT64 context_counters_8x8[BLOCK_TYPES_8X8][COEF_BANDS]
+                                 [PREV_COEF_CONTEXTS][MAX_ENTROPY_TOKENS];
+extern INT64 context_counters_16x16[BLOCK_TYPES_16X16][COEF_BANDS]
+                                   [PREV_COEF_CONTEXTS][MAX_ENTROPY_TOKENS];
+#endif
+
+extern const int *vp9_dct_value_cost_ptr;
+/* TODO: The Token field should be broken out into a separate char array to
+ *  improve cache locality, since it's needed for costing when the rest of the
+ *  fields are not.
+ */
+extern const TOKENVALUE *vp9_dct_value_tokens_ptr;
+
+#endif  /* tokenize_h */