| /* |

| * 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_ |