40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
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/* Copyright (C) 2001-2019 Artifex Software, Inc.
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All Rights Reserved.
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This software is provided AS-IS with no warranty, either express or
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implied.
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This software is distributed under license and may not be copied,
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modified or distributed except as expressly authorized under the terms
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of the license contained in the file LICENSE in this distribution.
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Refer to licensing information at http://www.artifex.com or contact
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Artifex Software, Inc., 1305 Grant Avenue - Suite 200, Novato,
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CA 94945, U.S.A., +1(415)492-9861, for further information.
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*/
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/*
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jbig2dec
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*/
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#ifndef _JBIG2_ARITH_H
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#define _JBIG2_ARITH_H
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typedef struct _Jbig2ArithState Jbig2ArithState;
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/* An arithmetic coding context is stored as a single byte, with the
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index in the low order 7 bits (actually only 6 are used), and the
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MPS in the top bit. */
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typedef unsigned char Jbig2ArithCx;
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/* allocate and initialize a new arithmetic coding state */
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Jbig2ArithState *jbig2_arith_new(Jbig2Ctx *ctx, Jbig2WordStream *ws);
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/* decode a bit */
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bool jbig2_arith_decode(Jbig2ArithState *as, Jbig2ArithCx *pcx, int *code);
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/* returns true if the end of the data stream has been reached (for sanity checks) */
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bool jbig2_arith_has_reached_marker(Jbig2ArithState *as);
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#endif /* _JBIG2_ARITH_H */
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