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Diffstat (limited to 'vp8/common/entropymode.c')
| -rw-r--r-- | vp8/common/entropymode.c | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/vp8/common/entropymode.c b/vp8/common/entropymode.c new file mode 100644 index 000000000..7dc1acde0 --- /dev/null +++ b/vp8/common/entropymode.c @@ -0,0 +1,270 @@ +/* + * Copyright (c) 2010 The VP8 project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license and patent + * grant that can be found in the LICENSE file in the root of the source + * tree. 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 +}; + +typedef enum +{ + SUBMVREF_NORMAL, + SUBMVREF_LEFT_ZED, + SUBMVREF_ABOVE_ZED, + SUBMVREF_LEFT_ABOVE_SAME, + SUBMVREF_LEFT_ABOVE_ZED +} sumvfref_t; + +int vp8_mv_cont(const MV *l, const MV *a) +{ + int lez = (l->row == 0 && l->col == 0); + int aez = (a->row == 0 && a->col == 0); + int lea = (l->row == a->row && l->col == a->col); + + 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(VP8_MVREFENCODINGS, vp8_mv_ref_tree); + vp8_tokens_from_tree(VP8_SUBMVREFENCODINGS, vp8_sub_mv_ref_tree); + + vp8_tokens_from_tree(vp8_small_mvencodings, vp8_small_mvtree); +} |