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a6f10c9181
Differential Revision: https://phabricator.services.mozilla.com/D6206 --HG-- rename : third_party/aom/aom_ports/ppc.h => third_party/aom/aom_dsp/x86/sum_squares_sse2.h rename : third_party/aom/av1/decoder/obu.h => third_party/aom/av1/common/obu_util.h rename : third_party/aom/build/make/ios-Info.plist => third_party/aom/build/cmake/ios-Info.plist rename : third_party/aom/build/make/iosbuild.sh => third_party/aom/build/cmake/iosbuild.sh rename : third_party/aom/build/make/rtcd.pl => third_party/aom/build/cmake/rtcd.pl rename : third_party/aom/common/y4menc.h => third_party/aom/common/rawenc.h extra : moz-landing-system : lando
86 lines
2.7 KiB
C
86 lines
2.7 KiB
C
/*
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* Copyright (c) 2001-2016, Alliance for Open Media. All rights reserved
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#ifndef AOM_AOM_DSP_ENTENC_H_
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#define AOM_AOM_DSP_ENTENC_H_
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#include <stddef.h>
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#include "aom_dsp/entcode.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct od_ec_enc od_ec_enc;
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#define OD_MEASURE_EC_OVERHEAD (0)
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/*The entropy encoder context.*/
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struct od_ec_enc {
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/*Buffered output.
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This contains only the raw bits until the final call to od_ec_enc_done(),
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where all the arithmetic-coded data gets prepended to it.*/
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unsigned char *buf;
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/*The size of the buffer.*/
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uint32_t storage;
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/*A buffer for output bytes with their associated carry flags.*/
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uint16_t *precarry_buf;
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/*The size of the pre-carry buffer.*/
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uint32_t precarry_storage;
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/*The offset at which the next entropy-coded byte will be written.*/
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uint32_t offs;
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/*The low end of the current range.*/
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od_ec_window low;
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/*The number of values in the current range.*/
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uint16_t rng;
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/*The number of bits of data in the current value.*/
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int16_t cnt;
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/*Nonzero if an error occurred.*/
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int error;
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#if OD_MEASURE_EC_OVERHEAD
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double entropy;
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int nb_symbols;
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#endif
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};
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/*See entenc.c for further documentation.*/
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void od_ec_enc_init(od_ec_enc *enc, uint32_t size) OD_ARG_NONNULL(1);
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void od_ec_enc_reset(od_ec_enc *enc) OD_ARG_NONNULL(1);
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void od_ec_enc_clear(od_ec_enc *enc) OD_ARG_NONNULL(1);
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void od_ec_encode_bool_q15(od_ec_enc *enc, int val, unsigned f_q15)
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OD_ARG_NONNULL(1);
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void od_ec_encode_cdf_q15(od_ec_enc *enc, int s, const uint16_t *cdf, int nsyms)
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OD_ARG_NONNULL(1) OD_ARG_NONNULL(3);
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void od_ec_enc_bits(od_ec_enc *enc, uint32_t fl, unsigned ftb)
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OD_ARG_NONNULL(1);
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void od_ec_enc_patch_initial_bits(od_ec_enc *enc, unsigned val, int nbits)
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OD_ARG_NONNULL(1);
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OD_WARN_UNUSED_RESULT unsigned char *od_ec_enc_done(od_ec_enc *enc,
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uint32_t *nbytes)
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OD_ARG_NONNULL(1) OD_ARG_NONNULL(2);
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OD_WARN_UNUSED_RESULT int od_ec_enc_tell(const od_ec_enc *enc)
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OD_ARG_NONNULL(1);
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OD_WARN_UNUSED_RESULT uint32_t od_ec_enc_tell_frac(const od_ec_enc *enc)
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OD_ARG_NONNULL(1);
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void od_ec_enc_checkpoint(od_ec_enc *dst, const od_ec_enc *src);
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void od_ec_enc_rollback(od_ec_enc *dst, const od_ec_enc *src);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // AOM_AOM_DSP_ENTENC_H_
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