1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libvpx/vp8/common/entropymv.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,44 @@
1.4 +/*
1.5 + * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license
1.8 + * that can be found in the LICENSE file in the root of the source
1.9 + * tree. An additional intellectual property rights grant can be found
1.10 + * in the file PATENTS. All contributing project authors may
1.11 + * be found in the AUTHORS file in the root of the source tree.
1.12 + */
1.13 +
1.14 +
1.15 +#ifndef __INC_ENTROPYMV_H
1.16 +#define __INC_ENTROPYMV_H
1.17 +
1.18 +#include "treecoder.h"
1.19 +
1.20 +enum
1.21 +{
1.22 + mv_max = 1023, /* max absolute value of a MV component */
1.23 + MVvals = (2 * mv_max) + 1, /* # possible values "" */
1.24 + mvfp_max = 255, /* max absolute value of a full pixel MV component */
1.25 + MVfpvals = (2 * mvfp_max) +1, /* # possible full pixel MV values */
1.26 +
1.27 + mvlong_width = 10, /* Large MVs have 9 bit magnitudes */
1.28 + mvnum_short = 8, /* magnitudes 0 through 7 */
1.29 +
1.30 + /* probability offsets for coding each MV component */
1.31 +
1.32 + mvpis_short = 0, /* short (<= 7) vs long (>= 8) */
1.33 + MVPsign, /* sign for non-zero */
1.34 + MVPshort, /* 8 short values = 7-position tree */
1.35 +
1.36 + MVPbits = MVPshort + mvnum_short - 1, /* mvlong_width long value bits */
1.37 + MVPcount = MVPbits + mvlong_width /* (with independent probabilities) */
1.38 +};
1.39 +
1.40 +typedef struct mv_context
1.41 +{
1.42 + vp8_prob prob[MVPcount]; /* often come in row, col pairs */
1.43 +} MV_CONTEXT;
1.44 +
1.45 +extern const MV_CONTEXT vp8_mv_update_probs[2], vp8_default_mv_context[2];
1.46 +
1.47 +#endif
