| /* |
| * Copyright (c) 2021, Alliance for Open Media. All rights reserved |
| * |
| * This source code is subject to the terms of the BSD 3-Clause Clear License |
| * and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear |
| * License was not distributed with this source code in the LICENSE file, you |
| * can obtain it at aomedia.org/license/software-license/bsd-3-c-c/. 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 |
| * aomedia.org/license/patent-license/. |
| */ |
| |
| #ifndef AOM_AV1_COMMON_ENTROPY_H_ |
| #define AOM_AV1_COMMON_ENTROPY_H_ |
| |
| #include "config/aom_config.h" |
| |
| #include "aom/aom_integer.h" |
| #include "aom_dsp/prob.h" |
| |
| #include "av1/common/common.h" |
| #include "av1/common/common_data.h" |
| #include "av1/common/enums.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #define TOKEN_CDF_Q_CTXS 4 |
| |
| #if CONFIG_CONTEXT_DERIVATION |
| #define CROSS_COMPONENT_CONTEXTS 3 |
| #define V_TXB_SKIP_CONTEXTS 12 |
| #define V_TXB_SKIP_CONTEXT_OFFSET 6 |
| #endif // CONFIG_CONTEXT_DERIVATION |
| |
| #define TXB_SKIP_CONTEXTS 20 |
| |
| #define IDTX_SIGN_CONTEXTS 9 |
| #define IDTX_SIG_COEF_CONTEXTS 14 |
| #define IDTX_LEVEL_CONTEXTS 14 |
| |
| #define EOB_COEF_CONTEXTS 9 |
| #define SIG_COEF_CONTEXTS_BOB 3 |
| |
| #define EOB_MAX_SYMS 11 |
| |
| #define COEFF_BASE_PH_CONTEXTS 5 |
| #define COEFF_BR_PH_CONTEXTS 7 |
| |
| // Number of coefficient coding contexts for the low-frequency region |
| // for 2D and 1D transforms |
| #define LF_SIG_COEF_CONTEXTS_2D 21 |
| #define LF_SIG_COEF_CONTEXTS_1D 12 |
| #define LF_SIG_COEF_CONTEXTS (LF_SIG_COEF_CONTEXTS_2D + LF_SIG_COEF_CONTEXTS_1D) |
| #define LF_LEVEL_CONTEXTS 14 // low-range contexts |
| |
| // Number of coefficient coding contexts for the higher-frequency default region |
| // for 2D and 1D transforms |
| #define SIG_COEF_CONTEXTS_2D 20 |
| #define SIG_COEF_CONTEXTS SIG_COEF_CONTEXTS_2D // base range contexts |
| #define LEVEL_CONTEXTS 7 // low range contexts |
| |
| #define SIG_COEF_CONTEXTS_EOB 4 // context count for the EOB coefficient |
| |
| // Number of symbols for base range coding in low-frequency region |
| #define LF_BASE_SYMBOLS 6 |
| #define LF_NUM_BASE_LEVELS (LF_BASE_SYMBOLS - 2) |
| #define LF_MAX_BASE_BR_RANGE (COEFF_BASE_RANGE + LF_NUM_BASE_LEVELS + 1) |
| |
| // Limits to determine the low-frequency region for coefficient coding. |
| #define LF_2D_LIM 4 // row + column limit |
| #define LF_2D_LIM_UV 1 // row + column limit for chroma |
| #define LF_RC_LIM 2 // row or column limit |
| #define LF_RC_LIM_UV 1 // row or column limit for chroma |
| |
| #define COEFF_BASE_CONTEXTS (SIG_COEF_CONTEXTS) |
| #define DC_SIGN_CONTEXTS 3 |
| |
| #define BR_TMP_OFFSET 12 |
| #define BR_REF_CAT 4 |
| |
| #define NUM_BASE_LEVELS 2 |
| |
| #define BR_CDF_SIZE (4) |
| #define COEFF_BASE_RANGE (4 * (BR_CDF_SIZE - 1)) |
| |
| #define COEFF_CONTEXT_BITS 3 |
| #define COEFF_CONTEXT_MASK ((1 << COEFF_CONTEXT_BITS) - 1) |
| #define MAX_BASE_BR_RANGE (COEFF_BASE_RANGE + NUM_BASE_LEVELS + 1) |
| |
| #define BASE_CONTEXT_POSITION_NUM 12 |
| |
| enum { |
| TX_CLASS_2D = 0, |
| TX_CLASS_HORIZ = 1, |
| TX_CLASS_VERT = 2, |
| TX_CLASSES = 3, |
| } UENUM1BYTE(TX_CLASS); |
| |
| #define DCT_MAX_VALUE 16384 |
| #define DCT_MAX_VALUE_HIGH10 65536 |
| #define DCT_MAX_VALUE_HIGH12 262144 |
| |
| /* Coefficients are predicted via a 3-dimensional probability table indexed on |
| * REF_TYPES, COEF_BANDS and COEF_CONTEXTS. */ |
| #define REF_TYPES 2 // intra=0, inter=1 |
| |
| struct AV1Common; |
| struct frame_contexts; |
| void av1_reset_cdf_symbol_counters(struct frame_contexts *fc); |
| void av1_default_coef_probs(struct AV1Common *cm); |
| |
| struct frame_contexts; |
| |
| typedef char ENTROPY_CONTEXT; |
| |
| static INLINE int combine_entropy_contexts(ENTROPY_CONTEXT a, |
| ENTROPY_CONTEXT b) { |
| return (a != 0) + (b != 0); |
| } |
| |
| static INLINE ENTROPY_CONTEXT get_entropy_context_1d(const ENTROPY_CONTEXT *ctx, |
| int size) { |
| switch (size) { |
| case 4: return ctx[0] != 0; |
| case 8: |
| #if CONFIG_EXT_RECUR_PARTITIONS |
| return ctx[0] != 0 || ctx[1] != 0; |
| #else |
| return !!*(const uint16_t *)ctx; |
| #endif // CONFIG_EXT_RECUR_PARTITIONS |
| case 16: |
| #if CONFIG_EXT_RECUR_PARTITIONS |
| return ctx[0] != 0 || ctx[1] != 0 || ctx[2] != 0 || ctx[3] != 0; |
| #else |
| return !!*(const uint32_t *)ctx; |
| #endif // CONFIG_EXT_RECUR_PARTITIONS |
| case 32: |
| #if CONFIG_EXT_RECUR_PARTITIONS |
| return !!(*(const uint16_t *)ctx | *(const uint16_t *)(ctx + 2) | |
| *(const uint16_t *)(ctx + 4) | *(const uint16_t *)(ctx + 6)); |
| #else |
| return !!*(const uint64_t *)ctx; |
| #endif // CONFIG_EXT_RECUR_PARTITIONS |
| case 64: return !!(*(const uint64_t *)ctx | *(const uint64_t *)(ctx + 8)); |
| default: assert(0 && "Invalid transform 1d size."); break; |
| } |
| |
| return 0; |
| } |
| |
| static INLINE int get_entropy_context(TX_SIZE tx_size, const ENTROPY_CONTEXT *a, |
| const ENTROPY_CONTEXT *l) { |
| assert(tx_size < TX_SIZES_ALL); |
| const int txw = tx_size_wide[tx_size]; |
| const int txh = tx_size_high[tx_size]; |
| ENTROPY_CONTEXT above_ec = 0, left_ec = 0; |
| |
| above_ec = get_entropy_context_1d(a, txw); |
| left_ec = get_entropy_context_1d(l, txh); |
| return combine_entropy_contexts(above_ec, left_ec); |
| } |
| |
| static INLINE TX_SIZE get_txsize_entropy_ctx(TX_SIZE txsize) { |
| return (TX_SIZE)((txsize_sqr_map[txsize] + txsize_sqr_up_map[txsize] + 1) >> |
| 1); |
| } |
| |
| #if CONFIG_EOB_POS_LUMA |
| #define EOB_PLANE_CTXS 3 |
| |
| static INLINE int get_eob_plane_ctx(int plane, int is_inter) { |
| return plane ? 2 : is_inter; |
| } |
| #endif // CONFIG_EOB_POS_LUMA |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #endif // AOM_AV1_COMMON_ENTROPY_H_ |