diff options
Diffstat (limited to '')
-rw-r--r-- | third_party/aom/aom_dsp/binary_codes_writer.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/binary_codes_writer.h b/third_party/aom/aom_dsp/binary_codes_writer.h new file mode 100644 index 0000000000..5ec8662139 --- /dev/null +++ b/third_party/aom/aom_dsp/binary_codes_writer.h @@ -0,0 +1,65 @@ +/* + * 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_ |