132 lines
4.2 KiB
C
132 lines
4.2 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef __INC_ENTROPYMV_H
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#define __INC_ENTROPYMV_H
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#include "treecoder.h"
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#include "vpx_config.h"
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#include "blockd.h"
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struct VP8Common;
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void vp8_entropy_mv_init();
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void vp8_init_mv_probs(struct VP8Common *cm);
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void vp8_adapt_mv_probs(struct VP8Common *cm);
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void vp8_adapt_nmv_probs(struct VP8Common *cm, int usehp);
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void vp8_lower_mv_precision(MV *mv);
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int vp8_use_nmv_hp(const MV *ref);
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#define VP8_NMV_UPDATE_PROB 255
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//#define MV_GROUP_UPDATE
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#define LOW_PRECISION_MV_UPDATE /* Use 7 bit forward update */
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/* Symbols for coding which components are zero jointly */
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#define MV_JOINTS 4
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typedef enum {
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MV_JOINT_ZERO = 0, /* Zero vector */
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MV_JOINT_HNZVZ = 1, /* Vert zero, hor nonzero */
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MV_JOINT_HZVNZ = 2, /* Hor zero, vert nonzero */
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MV_JOINT_HNZVNZ = 3, /* Both components nonzero */
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} MV_JOINT_TYPE;
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extern const vp8_tree_index vp8_mv_joint_tree[2 * MV_JOINTS - 2];
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extern struct vp8_token_struct vp8_mv_joint_encodings [MV_JOINTS];
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/* Symbols for coding magnitude class of nonzero components */
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#define MV_CLASSES 8
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typedef enum {
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MV_CLASS_0 = 0, /* (0, 2] integer pel */
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MV_CLASS_1 = 1, /* (2, 4] integer pel */
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MV_CLASS_2 = 2, /* (4, 8] integer pel */
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MV_CLASS_3 = 3, /* (8, 16] integer pel */
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MV_CLASS_4 = 4, /* (16, 32] integer pel */
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MV_CLASS_5 = 5, /* (32, 64] integer pel */
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MV_CLASS_6 = 6, /* (64, 128] integer pel */
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MV_CLASS_7 = 7, /* (128, 256] integer pel */
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} MV_CLASS_TYPE;
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extern const vp8_tree_index vp8_mv_class_tree[2 * MV_CLASSES - 2];
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extern struct vp8_token_struct vp8_mv_class_encodings [MV_CLASSES];
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#define CLASS0_BITS 1 /* bits at integer precision for class 0 */
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#define CLASS0_SIZE (1 << CLASS0_BITS)
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#define MV_OFFSET_BITS (MV_CLASSES + CLASS0_BITS - 2)
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#define MV_MAX_BITS (MV_CLASSES + CLASS0_BITS + 2)
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#define MV_MAX ((1 << MV_MAX_BITS) - 1)
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#define MV_VALS ((MV_MAX << 1) + 1)
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extern const vp8_tree_index vp8_mv_class0_tree[2 * CLASS0_SIZE - 2];
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extern struct vp8_token_struct vp8_mv_class0_encodings[CLASS0_SIZE];
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extern const vp8_tree_index vp8_mv_fp_tree[2 * 4 - 2];
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extern struct vp8_token_struct vp8_mv_fp_encodings[4];
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typedef struct {
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vp8_prob sign;
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vp8_prob classes[MV_CLASSES - 1];
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vp8_prob class0[CLASS0_SIZE - 1];
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vp8_prob bits[MV_OFFSET_BITS];
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vp8_prob class0_fp[CLASS0_SIZE][4 - 1];
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vp8_prob fp[4 - 1];
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vp8_prob class0_hp;
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vp8_prob hp;
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} nmv_component;
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typedef struct {
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vp8_prob joints[MV_JOINTS - 1];
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nmv_component comps[2];
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} nmv_context;
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MV_JOINT_TYPE vp8_get_mv_joint(MV mv);
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MV_CLASS_TYPE vp8_get_mv_class(int z, int *offset);
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int vp8_get_mv_mag(MV_CLASS_TYPE c, int offset);
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typedef struct {
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unsigned int mvcount[MV_VALS];
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unsigned int sign[2];
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unsigned int classes[MV_CLASSES];
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unsigned int class0[CLASS0_SIZE];
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unsigned int bits[MV_OFFSET_BITS][2];
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unsigned int class0_fp[CLASS0_SIZE][4];
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unsigned int fp[4];
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unsigned int class0_hp[2];
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unsigned int hp[2];
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} nmv_component_counts;
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typedef struct {
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unsigned int joints[MV_JOINTS];
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nmv_component_counts comps[2];
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} nmv_context_counts;
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void vp8_increment_nmv(const MV *mv, const MV *ref, nmv_context_counts *mvctx,
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int usehp);
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extern const nmv_context vp8_default_nmv_context;
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void vp8_counts_to_nmv_context(
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nmv_context_counts *NMVcount,
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nmv_context *prob,
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int usehp,
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unsigned int (*branch_ct_joint)[2],
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unsigned int (*branch_ct_sign)[2],
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unsigned int (*branch_ct_classes)[MV_CLASSES - 1][2],
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unsigned int (*branch_ct_class0)[CLASS0_SIZE - 1][2],
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unsigned int (*branch_ct_bits)[MV_OFFSET_BITS][2],
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unsigned int (*branch_ct_class0_fp)[CLASS0_SIZE][4 - 1][2],
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unsigned int (*branch_ct_fp)[4 - 1][2],
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unsigned int (*branch_ct_class0_hp)[2],
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unsigned int (*branch_ct_hp)[2]);
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#endif
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