141 строка
4.1 KiB
C
141 строка
4.1 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 VP9_COMMON_VP9_ENTROPYMV_H_
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#define VP9_COMMON_VP9_ENTROPYMV_H_
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#include "./vpx_config.h"
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#include "vpx_dsp/prob.h"
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#include "vp9/common/vp9_mv.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct VP9Common;
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void vp9_init_mv_probs(struct VP9Common *cm);
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void vp9_adapt_mv_probs(struct VP9Common *cm, int usehp);
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// Integer pel reference mv threshold for use of high-precision 1/8 mv
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#define COMPANDED_MVREF_THRESH 8
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static INLINE int use_mv_hp(const MV *ref) {
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return (abs(ref->row) >> 3) < COMPANDED_MVREF_THRESH &&
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(abs(ref->col) >> 3) < COMPANDED_MVREF_THRESH;
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}
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#define MV_UPDATE_PROB 252
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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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static INLINE int mv_joint_vertical(MV_JOINT_TYPE type) {
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return type == MV_JOINT_HZVNZ || type == MV_JOINT_HNZVNZ;
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}
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static INLINE int mv_joint_horizontal(MV_JOINT_TYPE type) {
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return type == MV_JOINT_HNZVZ || type == MV_JOINT_HNZVNZ;
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}
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/* Symbols for coding magnitude class of nonzero components */
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#define MV_CLASSES 11
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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_8 = 8, /* (256, 512] integer pel */
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MV_CLASS_9 = 9, /* (512, 1024] integer pel */
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MV_CLASS_10 = 10, /* (1024,2048] integer pel */
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} MV_CLASS_TYPE;
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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_FP_SIZE 4
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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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#define MV_IN_USE_BITS 14
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#define MV_UPP ((1 << MV_IN_USE_BITS) - 1)
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#define MV_LOW (-(1 << MV_IN_USE_BITS))
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extern const vpx_tree_index vp9_mv_joint_tree[];
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extern const vpx_tree_index vp9_mv_class_tree[];
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extern const vpx_tree_index vp9_mv_class0_tree[];
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extern const vpx_tree_index vp9_mv_fp_tree[];
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typedef struct {
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vpx_prob sign;
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vpx_prob classes[MV_CLASSES - 1];
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vpx_prob class0[CLASS0_SIZE - 1];
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vpx_prob bits[MV_OFFSET_BITS];
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vpx_prob class0_fp[CLASS0_SIZE][MV_FP_SIZE - 1];
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vpx_prob fp[MV_FP_SIZE - 1];
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vpx_prob class0_hp;
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vpx_prob hp;
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} nmv_component;
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typedef struct {
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vpx_prob joints[MV_JOINTS - 1];
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nmv_component comps[2];
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} nmv_context;
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static INLINE MV_JOINT_TYPE vp9_get_mv_joint(const MV *mv) {
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if (mv->row == 0) {
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return mv->col == 0 ? MV_JOINT_ZERO : MV_JOINT_HNZVZ;
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} else {
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return mv->col == 0 ? MV_JOINT_HZVNZ : MV_JOINT_HNZVNZ;
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}
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}
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MV_CLASS_TYPE vp9_get_mv_class(int z, int *offset);
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typedef struct {
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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][MV_FP_SIZE];
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unsigned int fp[MV_FP_SIZE];
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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 vp9_inc_mv(const MV *mv, nmv_context_counts *mvctx);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // VP9_COMMON_VP9_ENTROPYMV_H_
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