1 files changed, 49 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vp8/common/entropymv.h b/media/libvpx/libvpx/vp8/common/entropymv.h
new file mode 100644
index 0000000000..40039f5b2c
--- /dev/null
+++ b/media/libvpx/libvpx/vp8/common/entropymv.h
@@ -0,0 +1,49 @@
+/*
+ *  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 VPX_VP8_COMMON_ENTROPYMV_H_
+#define VPX_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  // VPX_VP8_COMMON_ENTROPYMV_H_