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-rw-r--r--third_party/aom/av1/encoder/subexp.c164
1 files changed, 0 insertions, 164 deletions
diff --git a/third_party/aom/av1/encoder/subexp.c b/third_party/aom/av1/encoder/subexp.c
deleted file mode 100644
index dc96d712a..000000000
--- a/third_party/aom/av1/encoder/subexp.c
+++ /dev/null
@@ -1,164 +0,0 @@
-/*
- * Copyright (c) 2016, Alliance for Open Media. All rights reserved
- *
- * This source code is subject to the terms of the BSD 2 Clause License and
- * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
- * was not distributed with this source code in the LICENSE file, you can
- * obtain it at www.aomedia.org/license/software. If the Alliance for Open
- * Media Patent License 1.0 was not distributed with this source code in the
- * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
- */
-#include "aom_dsp/bitwriter.h"
-
-#include "av1/common/common.h"
-#include "av1/common/entropy.h"
-#include "av1/encoder/cost.h"
-#include "av1/encoder/subexp.h"
-
-static const uint8_t update_bits[255] = {
- 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6,
- 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 8, 8, 8, 8, 8, 8,
- 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
- 8, 8, 8, 8, 8, 8, 8, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
- 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
- 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
- 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11,
- 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
- 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
- 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
- 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
- 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
- 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
- 11, 11, 11, 11, 11, 11, 11, 0,
-};
-#define MIN_DELP_BITS 5
-
-static int recenter_nonneg(int v, int m) {
- if (v > (m << 1))
- return v;
- else if (v >= m)
- return ((v - m) << 1);
- else
- return ((m - v) << 1) - 1;
-}
-
-static int remap_prob(int v, int m) {
- int i;
- static const uint8_t map_table[MAX_PROB - 1] = {
- // generated by:
- // map_table[j] = split_index(j, MAX_PROB - 1, MODULUS_PARAM);
- 20, 21, 22, 23, 24, 25, 0, 26, 27, 28, 29, 30, 31, 32, 33,
- 34, 35, 36, 37, 1, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
- 48, 49, 2, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,
- 3, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 4, 74,
- 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 5, 86, 87, 88,
- 89, 90, 91, 92, 93, 94, 95, 96, 97, 6, 98, 99, 100, 101, 102,
- 103, 104, 105, 106, 107, 108, 109, 7, 110, 111, 112, 113, 114, 115, 116,
- 117, 118, 119, 120, 121, 8, 122, 123, 124, 125, 126, 127, 128, 129, 130,
- 131, 132, 133, 9, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144,
- 145, 10, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 11,
- 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 12, 170, 171,
- 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 13, 182, 183, 184, 185,
- 186, 187, 188, 189, 190, 191, 192, 193, 14, 194, 195, 196, 197, 198, 199,
- 200, 201, 202, 203, 204, 205, 15, 206, 207, 208, 209, 210, 211, 212, 213,
- 214, 215, 216, 217, 16, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227,
- 228, 229, 17, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241,
- 18, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 19,
- };
- v--;
- m--;
- if ((m << 1) <= MAX_PROB)
- i = recenter_nonneg(v, m) - 1;
- else
- i = recenter_nonneg(MAX_PROB - 1 - v, MAX_PROB - 1 - m) - 1;
-
- i = map_table[i];
- return i;
-}
-
-static int prob_diff_update_cost(aom_prob newp, aom_prob oldp) {
- int delp = remap_prob(newp, oldp);
- return update_bits[delp] << AV1_PROB_COST_SHIFT;
-}
-
-static void encode_uniform(aom_writer *w, int v) {
- const int l = 8;
- const int m = (1 << l) - 190;
- if (v < m) {
- aom_write_literal(w, v, l - 1);
- } else {
- aom_write_literal(w, m + ((v - m) >> 1), l - 1);
- aom_write_literal(w, (v - m) & 1, 1);
- }
-}
-
-static INLINE int write_bit_gte(aom_writer *w, int word, int test) {
- aom_write_literal(w, word >= test, 1);
- return word >= test;
-}
-
-static void encode_term_subexp(aom_writer *w, int word) {
- if (!write_bit_gte(w, word, 16)) {
- aom_write_literal(w, word, 4);
- } else if (!write_bit_gte(w, word, 32)) {
- aom_write_literal(w, word - 16, 4);
- } else if (!write_bit_gte(w, word, 64)) {
- aom_write_literal(w, word - 32, 5);
- } else {
- encode_uniform(w, word - 64);
- }
-}
-
-void av1_write_prob_diff_update(aom_writer *w, aom_prob newp, aom_prob oldp) {
- const int delp = remap_prob(newp, oldp);
- encode_term_subexp(w, delp);
-}
-
-int av1_prob_diff_update_savings_search(const unsigned int *ct, aom_prob oldp,
- aom_prob *bestp, aom_prob upd,
- int probwt) {
- const uint32_t old_b = cost_branch256(ct, oldp);
- int bestsavings = 0;
- aom_prob newp, bestnewp = oldp;
- const int step = *bestp > oldp ? -1 : 1;
- const int upd_cost = av1_cost_one(upd) - av1_cost_zero(upd);
-
- if (old_b > (uint32_t)upd_cost + (MIN_DELP_BITS << AV1_PROB_COST_SHIFT)) {
- for (newp = *bestp; newp != oldp; newp += step) {
- const int new_b = cost_branch256(ct, newp);
- const int update_b = prob_diff_update_cost(newp, oldp) + upd_cost;
- const int savings = (int)((int64_t)old_b - new_b - update_b * probwt);
- if (savings > bestsavings) {
- bestsavings = savings;
- bestnewp = newp;
- }
- }
- }
- *bestp = bestnewp;
- return bestsavings;
-}
-
-void av1_cond_prob_diff_update(aom_writer *w, aom_prob *oldp,
- const unsigned int ct[2], int probwt) {
- const aom_prob upd = DIFF_UPDATE_PROB;
- aom_prob newp = get_binary_prob(ct[0], ct[1]);
- const int savings =
- av1_prob_diff_update_savings_search(ct, *oldp, &newp, upd, probwt);
- assert(newp >= 1);
- if (savings > 0) {
- aom_write(w, 1, upd);
- av1_write_prob_diff_update(w, newp, *oldp);
- *oldp = newp;
- } else {
- aom_write(w, 0, upd);
- }
-}
-
-int av1_cond_prob_diff_update_savings(aom_prob *oldp, const unsigned int ct[2],
- int probwt) {
- const aom_prob upd = DIFF_UPDATE_PROB;
- aom_prob newp = get_binary_prob(ct[0], ct[1]);
- const int savings =
- av1_prob_diff_update_savings_search(ct, *oldp, &newp, upd, probwt);
- return savings;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-26 21:57:42 +0000