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- /*
- * Copyright (c) 2017, 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_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_
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