| /* |
| * 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_BINARY_CODES_WRITER_H_ |
| #define AOM_AOM_DSP_BINARY_CODES_WRITER_H_ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #include <assert.h> |
| #include "config/aom_config.h" |
| |
| #include "aom/aom_integer.h" |
| #include "aom_dsp/bitwriter.h" |
| #include "aom_dsp/bitwriter_buffer.h" |
| |
| // Codes a symbol v in [-2^mag_bits, 2^mag_bits] |
| // mag_bits is number of bits for magnitude. The alphabet is of size |
| // 2 * 2^mag_bits + 1, symmetric around 0, where one bit is used to |
| // indicate 0 or non-zero, mag_bits bits are used to indicate magnitide |
| // and 1 more bit for the sign if non-zero. |
| void aom_write_primitive_symmetric(aom_writer *w, int16_t v, |
| unsigned int mag_bits); |
| |
| // Encodes a value v in [0, n-1] quasi-uniformly |
| void aom_write_primitive_quniform(aom_writer *w, uint16_t n, uint16_t v); |
| |
| // Finite subexponential code that codes a symbol v in [0, n-1] with parameter k |
| void aom_write_primitive_subexpfin(aom_writer *w, uint16_t n, uint16_t k, |
| uint16_t v); |
| |
| // Finite subexponential code that codes a symbol v in [0, n-1] with parameter k |
| // based on a reference ref also in [0, n-1]. |
| void aom_write_primitive_refsubexpfin(aom_writer *w, uint16_t n, uint16_t k, |
| uint16_t ref, uint16_t v); |
| |
| // Finite subexponential code that codes a symbol v in [-(n-1), n-1] with |
| // parameter k based on a reference ref also in [-(n-1), n-1]. |
| void aom_write_signed_primitive_refsubexpfin(aom_writer *w, uint16_t n, |
| uint16_t k, int16_t ref, |
| int16_t v); |
| |
| // Functions that counts bits for the above primitives |
| int aom_count_primitive_symmetric(int16_t v, unsigned int mag_bits); |
| int aom_count_primitive_quniform(uint16_t n, uint16_t v); |
| int aom_count_primitive_subexpfin(uint16_t n, uint16_t k, uint16_t v); |
| int aom_count_primitive_refsubexpfin(uint16_t n, uint16_t k, uint16_t ref, |
| uint16_t v); |
| int aom_count_signed_primitive_refsubexpfin(uint16_t n, uint16_t k, int16_t ref, |
| int16_t v); |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #endif // AOM_AOM_DSP_BINARY_CODES_WRITER_H_ |