ref: 623e988addfa8add7a21c69aa893ba42f7d5236e
dir: /vp8/common/entropymv.h/
/* * 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 VP8_COMMON_ENTROPYMV_H_ #define VP8_COMMON_ENTROPYMV_H_ #include "treecoder.h" #ifdef __cplusplus extern "C" { #endif enum { mv_max = 1023, /* max absolute value of a MV component */ MVvals = (2 * mv_max) + 1, /* # possible values "" */ mvfp_max = 255, /* max absolute value of a full pixel MV component */ MVfpvals = (2 * mvfp_max) +1, /* # possible full pixel MV values */ mvlong_width = 10, /* Large MVs have 9 bit magnitudes */ mvnum_short = 8, /* magnitudes 0 through 7 */ /* 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]; #ifdef __cplusplus } // extern "C" #endif #endif // VP8_COMMON_ENTROPYMV_H_