| /* |
| * 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_AOM_DSP_ENTCODE_H_ |
| #define AOM_AOM_DSP_ENTCODE_H_ |
| |
| #include <limits.h> |
| #include <stddef.h> |
| #include "av1/common/odintrin.h" |
| #include "aom_dsp/prob.h" |
| |
| #define EC_PROB_SHIFT 6 |
| #define EC_MIN_PROB 4 // must be <= (1<<EC_PROB_SHIFT)/16 |
| |
| /*OPT: od_ec_window must be at least 32 bits, but if you have fast arithmetic |
| on a larger type, you can speed up the decoder by using it here.*/ |
| typedef uint32_t od_ec_window; |
| |
| /*The size in bits of od_ec_window.*/ |
| #define OD_EC_WINDOW_SIZE ((int)sizeof(od_ec_window) * CHAR_BIT) |
| |
| /*The resolution of fractional-precision bit usage measurements, i.e., |
| 3 => 1/8th bits.*/ |
| #define OD_BITRES (3) |
| |
| #define OD_ICDF AOM_ICDF |
| |
| /*See entcode.c for further documentation.*/ |
| |
| OD_WARN_UNUSED_RESULT uint32_t od_ec_tell_frac(uint32_t nbits_total, |
| uint32_t rng); |
| |
| #endif // AOM_AOM_DSP_ENTCODE_H_ |