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Diffstat (limited to 'media/libaom/src/av1/common/entropy.h')
| -rw-r--r-- | media/libaom/src/av1/common/entropy.h | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/media/libaom/src/av1/common/entropy.h b/media/libaom/src/av1/common/entropy.h new file mode 100644 index 000000000..991692c2f --- /dev/null +++ b/media/libaom/src/av1/common/entropy.h @@ -0,0 +1,181 @@ +/* + * 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 6 +#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 + +typedef enum TX_CLASS { + TX_CLASS_2D = 0, + TX_CLASS_HORIZ = 1, + TX_CLASS_VERT = 2, + TX_CLASSES = 3, +} 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 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_ |