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-rw-r--r--media/libvpx/vp8/common/entropymv.h52
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diff --git a/media/libvpx/vp8/common/entropymv.h b/media/libvpx/vp8/common/entropymv.h
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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 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_