182 lines
5 KiB
C
182 lines
5 KiB
C
/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved.
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#ifndef AOM_AV1_COMMON_ENTROPY_H_
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#define AOM_AV1_COMMON_ENTROPY_H_
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#include "config/aom_config.h"
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#include "aom/aom_integer.h"
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#include "aom_dsp/prob.h"
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#include "av1/common/common.h"
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#include "av1/common/common_data.h"
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#include "av1/common/enums.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define TOKEN_CDF_Q_CTXS 4
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#define TXB_SKIP_CONTEXTS 13
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#define EOB_COEF_CONTEXTS 9
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#define SIG_COEF_CONTEXTS_2D 26
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#define SIG_COEF_CONTEXTS_1D 16
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#define SIG_COEF_CONTEXTS_EOB 4
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#define SIG_COEF_CONTEXTS (SIG_COEF_CONTEXTS_2D + SIG_COEF_CONTEXTS_1D)
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#define COEFF_BASE_CONTEXTS (SIG_COEF_CONTEXTS)
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#define DC_SIGN_CONTEXTS 3
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#define BR_TMP_OFFSET 12
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#define BR_REF_CAT 4
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#define LEVEL_CONTEXTS 21
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#define NUM_BASE_LEVELS 2
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#define BR_CDF_SIZE (4)
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#define COEFF_BASE_RANGE (4 * (BR_CDF_SIZE - 1))
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#define COEFF_CONTEXT_BITS 3
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#define COEFF_CONTEXT_MASK ((1 << COEFF_CONTEXT_BITS) - 1)
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#define MAX_BASE_BR_RANGE (COEFF_BASE_RANGE + NUM_BASE_LEVELS + 1)
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#define BASE_CONTEXT_POSITION_NUM 12
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enum {
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TX_CLASS_2D = 0,
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TX_CLASS_HORIZ = 1,
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TX_CLASS_VERT = 2,
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TX_CLASSES = 3,
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} UENUM1BYTE(TX_CLASS);
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#define DCT_MAX_VALUE 16384
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#define DCT_MAX_VALUE_HIGH10 65536
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#define DCT_MAX_VALUE_HIGH12 262144
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/* Coefficients are predicted via a 3-dimensional probability table indexed on
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* REF_TYPES, COEF_BANDS and COEF_CONTEXTS. */
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#define REF_TYPES 2 // intra=0, inter=1
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struct AV1Common;
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struct frame_contexts;
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void av1_reset_cdf_symbol_counters(struct frame_contexts *fc);
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void av1_default_coef_probs(struct AV1Common *cm);
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void av1_init_mode_probs(struct frame_contexts *fc);
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struct frame_contexts;
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typedef char ENTROPY_CONTEXT;
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static inline int combine_entropy_contexts(ENTROPY_CONTEXT a,
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ENTROPY_CONTEXT b) {
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return (a != 0) + (b != 0);
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}
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static inline int get_entropy_context(TX_SIZE tx_size, const ENTROPY_CONTEXT *a,
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const ENTROPY_CONTEXT *l) {
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ENTROPY_CONTEXT above_ec = 0, left_ec = 0;
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switch (tx_size) {
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case TX_4X4:
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above_ec = a[0] != 0;
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left_ec = l[0] != 0;
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break;
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case TX_4X8:
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above_ec = a[0] != 0;
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left_ec = !!*(const uint16_t *)l;
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break;
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case TX_8X4:
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above_ec = !!*(const uint16_t *)a;
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left_ec = l[0] != 0;
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break;
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case TX_8X16:
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above_ec = !!*(const uint16_t *)a;
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left_ec = !!*(const uint32_t *)l;
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break;
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case TX_16X8:
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above_ec = !!*(const uint32_t *)a;
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left_ec = !!*(const uint16_t *)l;
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break;
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case TX_16X32:
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above_ec = !!*(const uint32_t *)a;
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left_ec = !!*(const uint64_t *)l;
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break;
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case TX_32X16:
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above_ec = !!*(const uint64_t *)a;
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left_ec = !!*(const uint32_t *)l;
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break;
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case TX_8X8:
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above_ec = !!*(const uint16_t *)a;
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left_ec = !!*(const uint16_t *)l;
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break;
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case TX_16X16:
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above_ec = !!*(const uint32_t *)a;
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left_ec = !!*(const uint32_t *)l;
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break;
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case TX_32X32:
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above_ec = !!*(const uint64_t *)a;
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left_ec = !!*(const uint64_t *)l;
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break;
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case TX_64X64:
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above_ec = !!(*(const uint64_t *)a | *(const uint64_t *)(a + 8));
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left_ec = !!(*(const uint64_t *)l | *(const uint64_t *)(l + 8));
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break;
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case TX_32X64:
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above_ec = !!*(const uint64_t *)a;
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left_ec = !!(*(const uint64_t *)l | *(const uint64_t *)(l + 8));
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break;
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case TX_64X32:
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above_ec = !!(*(const uint64_t *)a | *(const uint64_t *)(a + 8));
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left_ec = !!*(const uint64_t *)l;
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break;
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case TX_4X16:
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above_ec = a[0] != 0;
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left_ec = !!*(const uint32_t *)l;
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break;
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case TX_16X4:
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above_ec = !!*(const uint32_t *)a;
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left_ec = l[0] != 0;
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break;
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case TX_8X32:
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above_ec = !!*(const uint16_t *)a;
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left_ec = !!*(const uint64_t *)l;
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break;
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case TX_32X8:
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above_ec = !!*(const uint64_t *)a;
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left_ec = !!*(const uint16_t *)l;
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break;
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case TX_16X64:
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above_ec = !!*(const uint32_t *)a;
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left_ec = !!(*(const uint64_t *)l | *(const uint64_t *)(l + 8));
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break;
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case TX_64X16:
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above_ec = !!(*(const uint64_t *)a | *(const uint64_t *)(a + 8));
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left_ec = !!*(const uint32_t *)l;
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break;
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default: assert(0 && "Invalid transform size."); break;
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}
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return combine_entropy_contexts(above_ec, left_ec);
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}
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static inline TX_SIZE get_txsize_entropy_ctx(TX_SIZE txsize) {
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return (TX_SIZE)((txsize_sqr_map[txsize] + txsize_sqr_up_map[txsize] + 1) >>
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1);
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}
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // AOM_AV1_COMMON_ENTROPY_H_
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