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-rw-r--r--media/libvpx/vp9/common/vp9_entropymv.h134
1 files changed, 134 insertions, 0 deletions
diff --git a/media/libvpx/vp9/common/vp9_entropymv.h b/media/libvpx/vp9/common/vp9_entropymv.h
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+++ b/media/libvpx/vp9/common/vp9_entropymv.h
@@ -0,0 +1,134 @@
+/*
+ * 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 VP9_COMMON_VP9_ENTROPYMV_H_
+#define VP9_COMMON_VP9_ENTROPYMV_H_
+
+#include "./vpx_config.h"
+
+#include "vp9/common/vp9_mv.h"
+#include "vp9/common/vp9_prob.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct VP9Common;
+
+void vp9_init_mv_probs(struct VP9Common *cm);
+
+void vp9_adapt_mv_probs(struct VP9Common *cm, int usehp);
+int vp9_use_mv_hp(const MV *ref);
+
+#define MV_UPDATE_PROB 252
+
+/* Symbols for coding which components are zero jointly */
+#define MV_JOINTS 4
+typedef enum {
+ MV_JOINT_ZERO = 0, /* Zero vector */
+ MV_JOINT_HNZVZ = 1, /* Vert zero, hor nonzero */
+ MV_JOINT_HZVNZ = 2, /* Hor zero, vert nonzero */
+ MV_JOINT_HNZVNZ = 3, /* Both components nonzero */
+} MV_JOINT_TYPE;
+
+static INLINE int mv_joint_vertical(MV_JOINT_TYPE type) {
+ return type == MV_JOINT_HZVNZ || type == MV_JOINT_HNZVNZ;
+}
+
+static INLINE int mv_joint_horizontal(MV_JOINT_TYPE type) {
+ return type == MV_JOINT_HNZVZ || type == MV_JOINT_HNZVNZ;
+}
+
+/* Symbols for coding magnitude class of nonzero components */
+#define MV_CLASSES 11
+typedef enum {
+ MV_CLASS_0 = 0, /* (0, 2] integer pel */
+ MV_CLASS_1 = 1, /* (2, 4] integer pel */
+ MV_CLASS_2 = 2, /* (4, 8] integer pel */
+ MV_CLASS_3 = 3, /* (8, 16] integer pel */
+ MV_CLASS_4 = 4, /* (16, 32] integer pel */
+ MV_CLASS_5 = 5, /* (32, 64] integer pel */
+ MV_CLASS_6 = 6, /* (64, 128] integer pel */
+ MV_CLASS_7 = 7, /* (128, 256] integer pel */
+ MV_CLASS_8 = 8, /* (256, 512] integer pel */
+ MV_CLASS_9 = 9, /* (512, 1024] integer pel */
+ MV_CLASS_10 = 10, /* (1024,2048] integer pel */
+} MV_CLASS_TYPE;
+
+#define CLASS0_BITS 1 /* bits at integer precision for class 0 */
+#define CLASS0_SIZE (1 << CLASS0_BITS)
+#define MV_OFFSET_BITS (MV_CLASSES + CLASS0_BITS - 2)
+#define MV_FP_SIZE 4
+
+#define MV_MAX_BITS (MV_CLASSES + CLASS0_BITS + 2)
+#define MV_MAX ((1 << MV_MAX_BITS) - 1)
+#define MV_VALS ((MV_MAX << 1) + 1)
+
+#define MV_IN_USE_BITS 14
+#define MV_UPP ((1 << MV_IN_USE_BITS) - 1)
+#define MV_LOW (-(1 << MV_IN_USE_BITS))
+
+extern const vp9_tree_index vp9_mv_joint_tree[];
+extern const vp9_tree_index vp9_mv_class_tree[];
+extern const vp9_tree_index vp9_mv_class0_tree[];
+extern const vp9_tree_index vp9_mv_fp_tree[];
+
+typedef struct {
+ vp9_prob sign;
+ vp9_prob classes[MV_CLASSES - 1];
+ vp9_prob class0[CLASS0_SIZE - 1];
+ vp9_prob bits[MV_OFFSET_BITS];
+ vp9_prob class0_fp[CLASS0_SIZE][MV_FP_SIZE - 1];
+ vp9_prob fp[MV_FP_SIZE - 1];
+ vp9_prob class0_hp;
+ vp9_prob hp;
+} nmv_component;
+
+typedef struct {
+ vp9_prob joints[MV_JOINTS - 1];
+ nmv_component comps[2];
+} nmv_context;
+
+static INLINE MV_JOINT_TYPE vp9_get_mv_joint(const MV *mv) {
+ if (mv->row == 0) {
+ return mv->col == 0 ? MV_JOINT_ZERO : MV_JOINT_HNZVZ;
+ } else {
+ return mv->col == 0 ? MV_JOINT_HZVNZ : MV_JOINT_HNZVNZ;
+ }
+}
+
+MV_CLASS_TYPE vp9_get_mv_class(int z, int *offset);
+int vp9_get_mv_mag(MV_CLASS_TYPE c, int offset);
+
+
+typedef struct {
+ unsigned int sign[2];
+ unsigned int classes[MV_CLASSES];
+ unsigned int class0[CLASS0_SIZE];
+ unsigned int bits[MV_OFFSET_BITS][2];
+ unsigned int class0_fp[CLASS0_SIZE][MV_FP_SIZE];
+ unsigned int fp[MV_FP_SIZE];
+ unsigned int class0_hp[2];
+ unsigned int hp[2];
+} nmv_component_counts;
+
+typedef struct {
+ unsigned int joints[MV_JOINTS];
+ nmv_component_counts comps[2];
+} nmv_context_counts;
+
+void vp9_inc_mv(const MV *mv, nmv_context_counts *mvctx);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // VP9_COMMON_VP9_ENTROPYMV_H_