ref: 12ee845ee71fd6634d5784e0ab924ccda17c8b32
dir: /vp8/common/entropymode.c/
/*
* 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.
*/
#include "entropymode.h"
#include "entropy.h"
#include "vpx_mem/vpx_mem.h"
static const unsigned int kf_y_mode_cts[VP8_YMODES] = { 1607, 915, 812, 811, 5455};
static const unsigned int y_mode_cts [VP8_YMODES] = { 8080, 1908, 1582, 1007, 5874};
static const unsigned int uv_mode_cts [VP8_UV_MODES] = { 59483, 13605, 16492, 4230};
static const unsigned int kf_uv_mode_cts[VP8_UV_MODES] = { 5319, 1904, 1703, 674};
static const unsigned int bmode_cts[VP8_BINTRAMODES] =
{
43891, 17694, 10036, 3920, 3363, 2546, 5119, 3221, 2471, 1723
};
int vp8_mv_cont(const int_mv *l, const int_mv *a)
{
int lez = (l->as_int == 0);
int aez = (a->as_int == 0);
int lea = (l->as_int == a->as_int);
if (lea && lez)
return SUBMVREF_LEFT_ABOVE_ZED;
if (lea)
return SUBMVREF_LEFT_ABOVE_SAME;
if (aez)
return SUBMVREF_ABOVE_ZED;
if (lez)
return SUBMVREF_LEFT_ZED;
return SUBMVREF_NORMAL;
}
static const vp8_prob sub_mv_ref_prob [VP8_SUBMVREFS-1] = { 180, 162, 25};
const vp8_prob vp8_sub_mv_ref_prob2 [SUBMVREF_COUNT][VP8_SUBMVREFS-1] =
{
{ 147, 136, 18 },
{ 106, 145, 1 },
{ 179, 121, 1 },
{ 223, 1 , 34 },
{ 208, 1 , 1 }
};
vp8_mbsplit vp8_mbsplits [VP8_NUMMBSPLITS] =
{
{
0, 0, 0, 0,
0, 0, 0, 0,
1, 1, 1, 1,
1, 1, 1, 1,
},
{
0, 0, 1, 1,
0, 0, 1, 1,
0, 0, 1, 1,
0, 0, 1, 1,
},
{
0, 0, 1, 1,
0, 0, 1, 1,
2, 2, 3, 3,
2, 2, 3, 3,
},
{
0, 1, 2, 3,
4, 5, 6, 7,
8, 9, 10, 11,
12, 13, 14, 15,
},
};
const int vp8_mbsplit_count [VP8_NUMMBSPLITS] = { 2, 2, 4, 16};
const vp8_prob vp8_mbsplit_probs [VP8_NUMMBSPLITS-1] = { 110, 111, 150};
/* Array indices are identical to previously-existing INTRAMODECONTEXTNODES. */
const vp8_tree_index vp8_bmode_tree[18] = /* INTRAMODECONTEXTNODE value */
{
-B_DC_PRED, 2, /* 0 = DC_NODE */
-B_TM_PRED, 4, /* 1 = TM_NODE */
-B_VE_PRED, 6, /* 2 = VE_NODE */
8, 12, /* 3 = COM_NODE */
-B_HE_PRED, 10, /* 4 = HE_NODE */
-B_RD_PRED, -B_VR_PRED, /* 5 = RD_NODE */
-B_LD_PRED, 14, /* 6 = LD_NODE */
-B_VL_PRED, 16, /* 7 = VL_NODE */
-B_HD_PRED, -B_HU_PRED /* 8 = HD_NODE */
};
/* Again, these trees use the same probability indices as their
explicitly-programmed predecessors. */
const vp8_tree_index vp8_ymode_tree[8] =
{
-DC_PRED, 2,
4, 6,
-V_PRED, -H_PRED,
-TM_PRED, -B_PRED
};
const vp8_tree_index vp8_kf_ymode_tree[8] =
{
-B_PRED, 2,
4, 6,
-DC_PRED, -V_PRED,
-H_PRED, -TM_PRED
};
const vp8_tree_index vp8_uv_mode_tree[6] =
{
-DC_PRED, 2,
-V_PRED, 4,
-H_PRED, -TM_PRED
};
const vp8_tree_index vp8_mbsplit_tree[6] =
{
-3, 2,
-2, 4,
-0, -1
};
const vp8_tree_index vp8_mv_ref_tree[8] =
{
-ZEROMV, 2,
-NEARESTMV, 4,
-NEARMV, 6,
-NEWMV, -SPLITMV
};
const vp8_tree_index vp8_sub_mv_ref_tree[6] =
{
-LEFT4X4, 2,
-ABOVE4X4, 4,
-ZERO4X4, -NEW4X4
};
struct vp8_token_struct vp8_bmode_encodings [VP8_BINTRAMODES];
struct vp8_token_struct vp8_ymode_encodings [VP8_YMODES];
struct vp8_token_struct vp8_kf_ymode_encodings [VP8_YMODES];
struct vp8_token_struct vp8_uv_mode_encodings [VP8_UV_MODES];
struct vp8_token_struct vp8_mbsplit_encodings [VP8_NUMMBSPLITS];
struct vp8_token_struct vp8_mv_ref_encoding_array [VP8_MVREFS];
struct vp8_token_struct vp8_sub_mv_ref_encoding_array [VP8_SUBMVREFS];
const vp8_tree_index vp8_small_mvtree [14] =
{
2, 8,
4, 6,
-0, -1,
-2, -3,
10, 12,
-4, -5,
-6, -7
};
struct vp8_token_struct vp8_small_mvencodings [8];
void vp8_init_mbmode_probs(VP8_COMMON *x)
{
unsigned int bct [VP8_YMODES] [2]; /* num Ymodes > num UV modes */
vp8_tree_probs_from_distribution(
VP8_YMODES, vp8_ymode_encodings, vp8_ymode_tree,
x->fc.ymode_prob, bct, y_mode_cts,
256, 1
);
vp8_tree_probs_from_distribution(
VP8_YMODES, vp8_kf_ymode_encodings, vp8_kf_ymode_tree,
x->kf_ymode_prob, bct, kf_y_mode_cts,
256, 1
);
vp8_tree_probs_from_distribution(
VP8_UV_MODES, vp8_uv_mode_encodings, vp8_uv_mode_tree,
x->fc.uv_mode_prob, bct, uv_mode_cts,
256, 1
);
vp8_tree_probs_from_distribution(
VP8_UV_MODES, vp8_uv_mode_encodings, vp8_uv_mode_tree,
x->kf_uv_mode_prob, bct, kf_uv_mode_cts,
256, 1
);
vpx_memcpy(x->fc.sub_mv_ref_prob, sub_mv_ref_prob, sizeof(sub_mv_ref_prob));
}
static void intra_bmode_probs_from_distribution(
vp8_prob p [VP8_BINTRAMODES-1],
unsigned int branch_ct [VP8_BINTRAMODES-1] [2],
const unsigned int events [VP8_BINTRAMODES]
)
{
vp8_tree_probs_from_distribution(
VP8_BINTRAMODES, vp8_bmode_encodings, vp8_bmode_tree,
p, branch_ct, events,
256, 1
);
}
void vp8_default_bmode_probs(vp8_prob p [VP8_BINTRAMODES-1])
{
unsigned int branch_ct [VP8_BINTRAMODES-1] [2];
intra_bmode_probs_from_distribution(p, branch_ct, bmode_cts);
}
void vp8_kf_default_bmode_probs(vp8_prob p [VP8_BINTRAMODES] [VP8_BINTRAMODES] [VP8_BINTRAMODES-1])
{
unsigned int branch_ct [VP8_BINTRAMODES-1] [2];
int i = 0;
do
{
int j = 0;
do
{
intra_bmode_probs_from_distribution(
p[i][j], branch_ct, vp8_kf_default_bmode_counts[i][j]);
}
while (++j < VP8_BINTRAMODES);
}
while (++i < VP8_BINTRAMODES);
}
void vp8_entropy_mode_init()
{
vp8_tokens_from_tree(vp8_bmode_encodings, vp8_bmode_tree);
vp8_tokens_from_tree(vp8_ymode_encodings, vp8_ymode_tree);
vp8_tokens_from_tree(vp8_kf_ymode_encodings, vp8_kf_ymode_tree);
vp8_tokens_from_tree(vp8_uv_mode_encodings, vp8_uv_mode_tree);
vp8_tokens_from_tree(vp8_mbsplit_encodings, vp8_mbsplit_tree);
vp8_tokens_from_tree_offset(vp8_mv_ref_encoding_array,
vp8_mv_ref_tree, NEARESTMV);
vp8_tokens_from_tree_offset(vp8_sub_mv_ref_encoding_array,
vp8_sub_mv_ref_tree, LEFT4X4);
vp8_tokens_from_tree(vp8_small_mvencodings, vp8_small_mvtree);
}