diff options
Diffstat (limited to 'media/libvpx/libvpx/vp8/common/entropy.c')
| -rw-r--r-- | media/libvpx/libvpx/vp8/common/entropy.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vp8/common/entropy.c b/media/libvpx/libvpx/vp8/common/entropy.c new file mode 100644 index 0000000000..fc4a3539fd --- /dev/null +++ b/media/libvpx/libvpx/vp8/common/entropy.c @@ -0,0 +1,147 @@ +/* + * 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 "entropy.h" +#include "blockd.h" +#include "onyxc_int.h" +#include "vpx_mem/vpx_mem.h" + +#include "coefupdateprobs.h" + +DECLARE_ALIGNED(16, const unsigned char, vp8_norm[256]) = { + 0, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 +}; + +DECLARE_ALIGNED(16, const unsigned char, + vp8_coef_bands[16]) = { 0, 1, 2, 3, 6, 4, 5, 6, + 6, 6, 6, 6, 6, 6, 6, 7 }; + +DECLARE_ALIGNED(16, const unsigned char, + vp8_prev_token_class[MAX_ENTROPY_TOKENS]) = { + 0, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 0 +}; + +DECLARE_ALIGNED(16, const int, vp8_default_zig_zag1d[16]) = { + 0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15, +}; + +DECLARE_ALIGNED(16, const short, + vp8_default_inv_zig_zag[16]) = { 1, 2, 6, 7, 3, 5, 8, 13, + 4, 9, 12, 14, 10, 11, 15, 16 }; + +/* vp8_default_zig_zag_mask generated with: + + void vp8_init_scan_order_mask() + { + int i; + + for (i = 0; i < 16; ++i) + { + vp8_default_zig_zag_mask[vp8_default_zig_zag1d[i]] = 1 << i; + } + + } +*/ +DECLARE_ALIGNED(16, const short, vp8_default_zig_zag_mask[16]) = { + 1, 2, 32, 64, 4, 16, 128, 4096, 8, 256, 2048, 8192, 512, 1024, 16384, -32768 +}; + +const int vp8_mb_feature_data_bits[MB_LVL_MAX] = { 7, 6 }; + +/* Array indices are identical to previously-existing CONTEXT_NODE indices */ +/* corresponding _CONTEXT_NODEs */ +/* clang-format off */ +const vp8_tree_index vp8_coef_tree[22] = { + -DCT_EOB_TOKEN, 2, /* 0 = EOB */ + -ZERO_TOKEN, 4, /* 1 = ZERO */ + -ONE_TOKEN, 6, /* 2 = ONE */ + 8, 12, /* 3 = LOW_VAL */ + -TWO_TOKEN, 10, /* 4 = TWO */ + -THREE_TOKEN, -FOUR_TOKEN, /* 5 = THREE */ + 14, 16, /* 6 = HIGH_LOW */ + -DCT_VAL_CATEGORY1, -DCT_VAL_CATEGORY2, /* 7 = CAT_ONE */ + 18, 20, /* 8 = CAT_THREEFOUR */ + -DCT_VAL_CATEGORY3, -DCT_VAL_CATEGORY4, /* 9 = CAT_THREE */ + -DCT_VAL_CATEGORY5, -DCT_VAL_CATEGORY6 /* 10 = CAT_FIVE */ +}; +/* clang-format on */ + +/* vp8_coef_encodings generated with: + vp8_tokens_from_tree(vp8_coef_encodings, vp8_coef_tree); +*/ +vp8_token vp8_coef_encodings[MAX_ENTROPY_TOKENS] = { + { 2, 2 }, { 6, 3 }, { 28, 5 }, { 58, 6 }, { 59, 6 }, { 60, 6 }, + { 61, 6 }, { 124, 7 }, { 125, 7 }, { 126, 7 }, { 127, 7 }, { 0, 1 } +}; + +/* Trees for extra bits. Probabilities are constant and + do not depend on previously encoded bits */ + +static const vp8_prob Pcat1[] = { 159 }; +static const vp8_prob Pcat2[] = { 165, 145 }; +static const vp8_prob Pcat3[] = { 173, 148, 140 }; +static const vp8_prob Pcat4[] = { 176, 155, 140, 135 }; +static const vp8_prob Pcat5[] = { 180, 157, 141, 134, 130 }; +static const vp8_prob Pcat6[] = { 254, 254, 243, 230, 196, 177, + 153, 140, 133, 130, 129 }; + +/* tree index tables generated with: + + void init_bit_tree(vp8_tree_index *p, int n) { + int i = 0; + + while (++i < n) { + p[0] = p[1] = i << 1; + p += 2; + } + + p[0] = p[1] = 0; + } + + void init_bit_trees() { + init_bit_tree(cat1, 1); + init_bit_tree(cat2, 2); + init_bit_tree(cat3, 3); + init_bit_tree(cat4, 4); + init_bit_tree(cat5, 5); + init_bit_tree(cat6, 11); + } +*/ + +static const vp8_tree_index cat1[2] = { 0, 0 }; +static const vp8_tree_index cat2[4] = { 2, 2, 0, 0 }; +static const vp8_tree_index cat3[6] = { 2, 2, 4, 4, 0, 0 }; +static const vp8_tree_index cat4[8] = { 2, 2, 4, 4, 6, 6, 0, 0 }; +static const vp8_tree_index cat5[10] = { 2, 2, 4, 4, 6, 6, 8, 8, 0, 0 }; +static const vp8_tree_index cat6[22] = { 2, 2, 4, 4, 6, 6, 8, 8, + 10, 10, 12, 12, 14, 14, 16, 16, + 18, 18, 20, 20, 0, 0 }; + +const vp8_extra_bit_struct vp8_extra_bits[12] = { + { 0, 0, 0, 0 }, { 0, 0, 0, 1 }, { 0, 0, 0, 2 }, + { 0, 0, 0, 3 }, { 0, 0, 0, 4 }, { cat1, Pcat1, 1, 5 }, + { cat2, Pcat2, 2, 7 }, { cat3, Pcat3, 3, 11 }, { cat4, Pcat4, 4, 19 }, + { cat5, Pcat5, 5, 35 }, { cat6, Pcat6, 11, 67 }, { 0, 0, 0, 0 } +}; + +#include "default_coef_probs.h" + +void vp8_default_coef_probs(VP8_COMMON *pc) { + memcpy(pc->fc.coef_probs, default_coef_probs, sizeof(default_coef_probs)); +} |