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/*
* 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"
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];
#if CONFIG_HIGH_PRECISION_MV
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];
#endif /* CONFIG_HIGH_PRECISION_MV */
extern const vp8_tree_index vp8_small_mvtree[];
extern struct vp8_token_struct vp8_small_mvencodings [8];
#if CONFIG_HIGH_PRECISION_MV
extern const vp8_tree_index vp8_small_mvtree_hp[];
extern struct vp8_token_struct vp8_small_mvencodings_hp [16];
#endif
void vp8_entropy_mv_init();
#endif
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