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112 lines
4.1 KiB
C
112 lines
4.1 KiB
C
#ifndef BITSTREAM_H_
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#define BITSTREAM_H_
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/*****************************************************************************
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* This file is part of uvg266 VVC encoder.
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*
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* Copyright (c) 2021, Tampere University, ITU/ISO/IEC, project contributors
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* * Neither the name of the Tampere University or ITU/ISO/IEC nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* INCLUDING NEGLIGENCE OR OTHERWISE ARISING IN ANY WAY OUT OF THE USE OF THIS
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****************************************************************************/
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/**
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* \ingroup CABAC
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* \file
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* Appending bits into an Annex-B coded bitstream.
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*/
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#include "global.h" // IWYU pragma: keep
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#include "uvg266.h"
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/**
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* A stream of bits.
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*/
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typedef struct bitstream_t
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{
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/// \brief Total number of complete bytes.
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uint32_t len;
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/// \brief Pointer to the first chunk, or NULL.
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uvg_data_chunk *first;
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/// \brief Pointer to the last chunk, or NULL.
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uvg_data_chunk *last;
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/// \brief The incomplete byte.
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uint8_t data;
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/// \brief Number of bits in the incomplete byte.
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uint8_t cur_bit;
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uint8_t zerocount;
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} bitstream_t;
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typedef struct
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{
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uint8_t len;
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uint32_t value;
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} bit_table_t;
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void uvg_bitstream_init(bitstream_t * stream);
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uvg_data_chunk * uvg_bitstream_alloc_chunk();
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uvg_data_chunk * uvg_bitstream_take_chunks(bitstream_t *stream);
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void uvg_bitstream_free_chunks(uvg_data_chunk *chunk);
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void uvg_bitstream_finalize(bitstream_t * stream);
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uint64_t uvg_bitstream_tell(const bitstream_t * stream);
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void uvg_bitstream_writebyte(bitstream_t *stream, uint8_t byte);
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void uvg_bitstream_move(bitstream_t *dst, bitstream_t *src);
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void uvg_bitstream_clear(bitstream_t *stream);
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void uvg_bitstream_put(bitstream_t *stream, uint32_t data, uint8_t bits);
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void uvg_bitstream_put_byte(bitstream_t *const stream, const uint32_t data);
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void uvg_bitstream_put_ue(bitstream_t *stream, uint32_t data);
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void uvg_bitstream_put_se(bitstream_t *stream, int32_t data);
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void uvg_bitstream_add_rbsp_trailing_bits(bitstream_t *stream);
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void uvg_bitstream_align(bitstream_t *stream);
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void uvg_bitstream_align_zero(bitstream_t *stream);
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/* In debug mode print out some extra info */
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#ifdef VERBOSE
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/* Counter to keep up with bits written */
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#define WRITE_U(stream, data, bits, name) { printf("%-50s u(%d) : %d\n", name,bits,data); uvg_bitstream_put(stream,data,bits);}
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#define WRITE_UE(stream, data, name) { printf("%-50s ue(v): %d\n", name,data); uvg_bitstream_put_ue(stream,data);}
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#define WRITE_SE(stream, data, name) { printf("%-50s se(v): %d\n", name,data); uvg_bitstream_put_se(stream,(data));}
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#else
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#define WRITE_U(stream, data, bits, name) { uvg_bitstream_put(stream,data,bits); }
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#define WRITE_UE(stream, data, name) { uvg_bitstream_put_ue(stream,data); }
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#define WRITE_SE(stream, data, name) { uvg_bitstream_put_se(stream,data); }
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#endif
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#endif
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