/* * 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 __INC_ENTROPYMV_H #define __INC_ENTROPYMV_H #include "treecoder.h" #include "vpx_config.h" #include "blockd.h" struct VP8Common; void vp8_entropy_mv_init(); void vp8_init_mv_probs(struct VP8Common *cm); void vp8_adapt_mv_probs(struct VP8Common *cm); #if CONFIG_NEWMVENTROPY void vp8_adapt_nmv_probs(struct VP8Common *cm, int usehp); void vp8_lower_mv_precision(MV *mv); int vp8_use_nmv_hp(const MV *ref); #define VP8_NMV_UPDATE_PROB 255 //#define MV_GROUP_UPDATE #define LOW_PRECISION_MV_UPDATE /* Use 7 bit forward update */ /* Symbols for coding which components are zero jointly */ #define MV_JOINTS 4 typedef enum { MV_JOINT_ZERO = 0, /* Zero vector */ MV_JOINT_HNZVZ = 1, /* Vert zero, hor nonzero */ MV_JOINT_HZVNZ = 2, /* Hor zero, vert nonzero */ MV_JOINT_HNZVNZ = 3, /* Both components nonzero */ } MV_JOINT_TYPE; extern const vp8_tree_index vp8_mv_joint_tree[2 * MV_JOINTS - 2]; extern struct vp8_token_struct vp8_mv_joint_encodings [MV_JOINTS]; /* Symbols for coding magnitude class of nonzero components */ #define MV_CLASSES 8 typedef enum { MV_CLASS_0 = 0, /* (0, 2] integer pel */ MV_CLASS_1 = 1, /* (2, 4] integer pel */ MV_CLASS_2 = 2, /* (4, 8] integer pel */ MV_CLASS_3 = 3, /* (8, 16] integer pel */ MV_CLASS_4 = 4, /* (16, 32] integer pel */ MV_CLASS_5 = 5, /* (32, 64] integer pel */ MV_CLASS_6 = 6, /* (64, 128] integer pel */ MV_CLASS_7 = 7, /* (128, 256] integer pel */ } MV_CLASS_TYPE; extern const vp8_tree_index vp8_mv_class_tree[2 * MV_CLASSES - 2]; extern struct vp8_token_struct vp8_mv_class_encodings [MV_CLASSES]; #define CLASS0_BITS 1 /* bits at integer precision for class 0 */ #define CLASS0_SIZE (1 << CLASS0_BITS) #define MV_OFFSET_BITS (MV_CLASSES + CLASS0_BITS - 2) #define MV_MAX_BITS (MV_CLASSES + CLASS0_BITS + 2) #define MV_MAX ((1 << MV_MAX_BITS) - 1) #define MV_VALS ((MV_MAX << 1) + 1) extern const vp8_tree_index vp8_mv_class0_tree[2 * CLASS0_SIZE - 2]; extern struct vp8_token_struct vp8_mv_class0_encodings[CLASS0_SIZE]; extern const vp8_tree_index vp8_mv_fp_tree[2 * 4 - 2]; extern struct vp8_token_struct vp8_mv_fp_encodings[4]; typedef struct { vp8_prob sign; vp8_prob classes[MV_CLASSES - 1]; vp8_prob class0[CLASS0_SIZE - 1]; vp8_prob bits[MV_OFFSET_BITS]; vp8_prob class0_fp[CLASS0_SIZE][4 - 1]; vp8_prob fp[4 - 1]; vp8_prob class0_hp; vp8_prob hp; } nmv_component; typedef struct { vp8_prob joints[MV_JOINTS - 1]; nmv_component comps[2]; } nmv_context; MV_JOINT_TYPE vp8_get_mv_joint(MV mv); MV_CLASS_TYPE vp8_get_mv_class(int z, int *offset); int vp8_get_mv_mag(MV_CLASS_TYPE c, int offset); typedef struct { unsigned int mvcount[MV_VALS]; unsigned int sign[2]; unsigned int classes[MV_CLASSES]; unsigned int class0[CLASS0_SIZE]; unsigned int bits[MV_OFFSET_BITS][2]; unsigned int class0_fp[CLASS0_SIZE][4]; unsigned int fp[4]; unsigned int class0_hp[2]; unsigned int hp[2]; } nmv_component_counts; typedef struct { unsigned int joints[MV_JOINTS]; nmv_component_counts comps[2]; } nmv_context_counts; void vp8_increment_nmv(const MV *mv, const MV *ref, nmv_context_counts *mvctx, int usehp); extern const nmv_context vp8_default_nmv_context; void vp8_counts_to_nmv_context( nmv_context_counts *NMVcount, nmv_context *prob, int usehp, unsigned int (*branch_ct_joint)[2], unsigned int (*branch_ct_sign)[2], unsigned int (*branch_ct_classes)[MV_CLASSES - 1][2], unsigned int (*branch_ct_class0)[CLASS0_SIZE - 1][2], unsigned int (*branch_ct_bits)[MV_OFFSET_BITS][2], unsigned int (*branch_ct_class0_fp)[CLASS0_SIZE][4 - 1][2], unsigned int (*branch_ct_fp)[4 - 1][2], unsigned int (*branch_ct_class0_hp)[2], unsigned int (*branch_ct_hp)[2]); #else /* CONFIG_NEWMVENTROPY */ enum { mv_max = 1023, /* max absolute value of a MV component */ MVvals = (2 * mv_max) + 1, /* # possible values "" */ mvlong_width = 10, /* Large MVs have 9 bit magnitudes */ mvnum_short = 8, /* magnitudes 0 through 7 */ mvnum_short_bits = 3, /* number of bits for short mvs */ mvfp_max = 255, /* max absolute value of a full pixel MV component */ MVfpvals = (2 * mvfp_max) + 1, /* # possible full pixel MV values */ /* probability offsets for coding each MV component */ mvpis_short = 0, /* short (<= 7) vs long (>= 8) */ MVPsign, /* sign for non-zero */ MVPshort, /* 8 short values = 7-position tree */ MVPbits = MVPshort + mvnum_short - 1, /* mvlong_width long value bits */ MVPcount = MVPbits + mvlong_width /* (with independent probabilities) */ }; typedef struct mv_context { vp8_prob prob[MVPcount]; /* often come in row, col pairs */ } MV_CONTEXT; extern const MV_CONTEXT vp8_mv_update_probs[2], vp8_default_mv_context[2]; enum { mv_max_hp = 2047, /* max absolute value of a MV component */ MVvals_hp = (2 * mv_max_hp) + 1, /* # possible values "" */ mvlong_width_hp = 11, /* Large MVs have 9 bit magnitudes */ mvnum_short_hp = 16, /* magnitudes 0 through 15 */ mvnum_short_bits_hp = 4, /* number of bits for short mvs */ mvfp_max_hp = 255, /* max absolute value of a full pixel MV component */ MVfpvals_hp = (2 * mvfp_max_hp) + 1, /* # possible full pixel MV values */ /* probability offsets for coding each MV component */ mvpis_short_hp = 0, /* short (<= 7) vs long (>= 8) */ MVPsign_hp, /* sign for non-zero */ MVPshort_hp, /* 8 short values = 7-position tree */ MVPbits_hp = MVPshort_hp + mvnum_short_hp - 1, /* mvlong_width long value bits */ MVPcount_hp = MVPbits_hp + mvlong_width_hp /* (with independent probabilities) */ }; typedef struct mv_context_hp { vp8_prob prob[MVPcount_hp]; /* often come in row, col pairs */ } MV_CONTEXT_HP; extern const MV_CONTEXT_HP vp8_mv_update_probs_hp[2], vp8_default_mv_context_hp[2]; extern const vp8_tree_index vp8_small_mvtree[]; extern struct vp8_token_struct vp8_small_mvencodings [8]; extern const vp8_tree_index vp8_small_mvtree_hp[]; extern struct vp8_token_struct vp8_small_mvencodings_hp [16]; #endif /* CONFIG_NEWMVENTROPY */ #endif