| /* |
| * 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. |
| */ |
| |
| #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 |
| |
| #define TXB_SKIP_CONTEXTS 13 |
| |
| #define EOB_COEF_CONTEXTS 9 |
| |
| #define SIG_COEF_CONTEXTS_2D 26 |
| #define SIG_COEF_CONTEXTS_1D 16 |
| #define SIG_COEF_CONTEXTS_EOB 4 |
| #define SIG_COEF_CONTEXTS (SIG_COEF_CONTEXTS_2D + SIG_COEF_CONTEXTS_1D) |
| |
| #define COEFF_BASE_CONTEXTS (SIG_COEF_CONTEXTS) |
| #define DC_SIGN_CONTEXTS 3 |
| |
| #define BR_TMP_OFFSET 12 |
| #define BR_REF_CAT 4 |
| #define LEVEL_CONTEXTS 21 |
| |
| #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); |
| void av1_init_mode_probs(struct frame_contexts *fc); |
| |
| 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 int get_entropy_context(TX_SIZE tx_size, const ENTROPY_CONTEXT *a, |
| const ENTROPY_CONTEXT *l) { |
| ENTROPY_CONTEXT above_ec = 0, left_ec = 0; |
| |
| switch (tx_size) { |
| case TX_4X4: |
| above_ec = a[0] != 0; |
| left_ec = l[0] != 0; |
| break; |
| case TX_4X8: |
| above_ec = a[0] != 0; |
| left_ec = !!*(const uint16_t *)l; |
| break; |
| case TX_8X4: |
| above_ec = !!*(const uint16_t *)a; |
| left_ec = l[0] != 0; |
| break; |
| case TX_8X16: |
| above_ec = !!*(const uint16_t *)a; |
| left_ec = !!*(const uint32_t *)l; |
| break; |
| case TX_16X8: |
| above_ec = !!*(const uint32_t *)a; |
| left_ec = !!*(const uint16_t *)l; |
| break; |
| case TX_16X32: |
| above_ec = !!*(const uint32_t *)a; |
| left_ec = !!*(const uint64_t *)l; |
| break; |
| case TX_32X16: |
| above_ec = !!*(const uint64_t *)a; |
| left_ec = !!*(const uint32_t *)l; |
| break; |
| case TX_8X8: |
| above_ec = !!*(const uint16_t *)a; |
| left_ec = !!*(const uint16_t *)l; |
| break; |
| case TX_16X16: |
| above_ec = !!*(const uint32_t *)a; |
| left_ec = !!*(const uint32_t *)l; |
| break; |
| case TX_32X32: |
| above_ec = !!*(const uint64_t *)a; |
| left_ec = !!*(const uint64_t *)l; |
| break; |
| case TX_64X64: |
| above_ec = !!(*(const uint64_t *)a | *(const uint64_t *)(a + 8)); |
| left_ec = !!(*(const uint64_t *)l | *(const uint64_t *)(l + 8)); |
| break; |
| case TX_32X64: |
| above_ec = !!*(const uint64_t *)a; |
| left_ec = !!(*(const uint64_t *)l | *(const uint64_t *)(l + 8)); |
| break; |
| case TX_64X32: |
| above_ec = !!(*(const uint64_t *)a | *(const uint64_t *)(a + 8)); |
| left_ec = !!*(const uint64_t *)l; |
| break; |
| case TX_4X16: |
| above_ec = a[0] != 0; |
| left_ec = !!*(const uint32_t *)l; |
| break; |
| case TX_16X4: |
| above_ec = !!*(const uint32_t *)a; |
| left_ec = l[0] != 0; |
| break; |
| case TX_8X32: |
| above_ec = !!*(const uint16_t *)a; |
| left_ec = !!*(const uint64_t *)l; |
| break; |
| case TX_32X8: |
| above_ec = !!*(const uint64_t *)a; |
| left_ec = !!*(const uint16_t *)l; |
| break; |
| case TX_16X64: |
| above_ec = !!*(const uint32_t *)a; |
| left_ec = !!(*(const uint64_t *)l | *(const uint64_t *)(l + 8)); |
| break; |
| case TX_64X16: |
| above_ec = !!(*(const uint64_t *)a | *(const uint64_t *)(a + 8)); |
| left_ec = !!*(const uint32_t *)l; |
| break; |
| default: assert(0 && "Invalid transform size."); break; |
| } |
| 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); |
| } |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #endif // AOM_AV1_COMMON_ENTROPY_H_ |