michael@0: /*
michael@0:  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
michael@0:  *
michael@0:  *  Use of this source code is governed by a BSD-style license
michael@0:  *  that can be found in the LICENSE file in the root of the source
michael@0:  *  tree. An additional intellectual property rights grant can be found
michael@0:  *  in the file PATENTS.  All contributing project authors may
michael@0:  *  be found in the AUTHORS file in the root of the source tree.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #ifndef __INC_ENTROPYMV_H
michael@0: #define __INC_ENTROPYMV_H
michael@0: 
michael@0: #include "treecoder.h"
michael@0: 
michael@0: enum
michael@0: {
michael@0:     mv_max  = 1023,              /* max absolute value of a MV component */
michael@0:     MVvals = (2 * mv_max) + 1,   /* # possible values "" */
michael@0:     mvfp_max  = 255,              /* max absolute value of a full pixel MV component */
michael@0:     MVfpvals = (2 * mvfp_max) +1, /* # possible full pixel MV values */
michael@0: 
michael@0:     mvlong_width = 10,       /* Large MVs have 9 bit magnitudes */
michael@0:     mvnum_short = 8,         /* magnitudes 0 through 7 */
michael@0: 
michael@0:     /* probability offsets for coding each MV component */
michael@0: 
michael@0:     mvpis_short = 0,         /* short (<= 7) vs long (>= 8) */
michael@0:     MVPsign,                /* sign for non-zero */
michael@0:     MVPshort,               /* 8 short values = 7-position tree */
michael@0: 
michael@0:     MVPbits = MVPshort + mvnum_short - 1, /* mvlong_width long value bits */
michael@0:     MVPcount = MVPbits + mvlong_width    /* (with independent probabilities) */
michael@0: };
michael@0: 
michael@0: typedef struct mv_context
michael@0: {
michael@0:     vp8_prob prob[MVPcount];  /* often come in row, col pairs */
michael@0: } MV_CONTEXT;
michael@0: 
michael@0: extern const MV_CONTEXT vp8_mv_update_probs[2], vp8_default_mv_context[2];
michael@0: 
michael@0: #endif