libvpx: Add VP9 decoder.

source/libvpx/vp9/encoder/vp9_segmentation.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.
+ */
+
+
+#include "string.h"
+#include "vp9/common/vp9_blockd.h"
+#include "vp9/encoder/vp9_onyx_int.h"
+
+#ifndef VP9_ENCODER_VP9_SEGMENTATION_H_
+#define VP9_ENCODER_VP9_SEGMENTATION_H_
+
+extern void vp9_update_gf_useage_maps(VP9_COMP *cpi, VP9_COMMON *cm,
+                                      MACROBLOCK *x);
+
+extern void vp9_enable_segmentation(VP9_PTR ptr);
+extern void vp9_disable_segmentation(VP9_PTR ptr);
+
+// Valid values for a segment are 0 to 3
+// Segmentation map is arrange as [Rows][Columns]
+extern void vp9_set_segmentation_map(VP9_PTR ptr,
+                                     unsigned char *segmentation_map);
+
+// The values given for each segment can be either deltas (from the default
+// value chosen for the frame) or absolute values.
+//
+// Valid range for abs values is (0-127 for MB_LVL_ALT_Q), (0-63 for
+// SEGMENT_ALT_LF)
+// Valid range for delta values are (+/-127 for MB_LVL_ALT_Q), (+/-63 for
+// SEGMENT_ALT_LF)
+//
+// abs_delta = SEGMENT_DELTADATA (deltas) abs_delta = SEGMENT_ABSDATA (use
+// the absolute values given).
+//
+extern void vp9_set_segment_data(VP9_PTR ptr, signed char *feature_data,
+                                 unsigned char abs_delta);
+
+extern void vp9_choose_segmap_coding_method(VP9_COMP *cpi);
+
+#endif /* __INC_SEGMENTATION_H__ */