X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=src%2Fgdcmopenjpeg%2Flibopenjpeg%2Fbio.c;h=3dfd7cf7ac58969c379c5283cd386960db99bc7d;hb=48215bafde3d6955d9cd60e074f6d6832ea9752f;hp=5bcfda372cc3b007462228437940b8f22a3a3340;hpb=bef3bec50f674640783aed3d3c4cbcdd3fb919d7;p=gdcm.git diff --git a/src/gdcmopenjpeg/libopenjpeg/bio.c b/src/gdcmopenjpeg/libopenjpeg/bio.c index 5bcfda37..3dfd7cf7 100644 --- a/src/gdcmopenjpeg/libopenjpeg/bio.c +++ b/src/gdcmopenjpeg/libopenjpeg/bio.c @@ -1,186 +1,186 @@ -/* - * Copyright (c) 2001-2003, David Janssens - * Copyright (c) 2002-2003, Yannick Verschueren - * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe - * Copyright (c) 2005, Hervé Drolon, FreeImage Team - * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include "opj_includes.h" - -/** @defgroup BIO BIO - Individual bit input-output stream */ -/*@{*/ - -/** @name Local static functions */ -/*@{*/ - -/** -Write a bit -@param bio BIO handle -@param b Bit to write (0 or 1) -*/ -static void bio_putbit(opj_bio_t *bio, int b); -/** -Read a bit -@param bio BIO handle -@return Returns the read bit -*/ -static int bio_getbit(opj_bio_t *bio); -/** -Write a byte -@param bio BIO handle -@return Returns 0 if successful, returns 1 otherwise -*/ -static int bio_byteout(opj_bio_t *bio); -/** -Read a byte -@param bio BIO handle -@return Returns 0 if successful, returns 1 otherwise -*/ -static int bio_bytein(opj_bio_t *bio); - -/*@}*/ - -/*@}*/ - -/* -========================================================== - local functions -========================================================== -*/ - -static int bio_byteout(opj_bio_t *bio) { - bio->buf = (bio->buf << 8) & 0xffff; - bio->ct = bio->buf == 0xff00 ? 7 : 8; - if (bio->bp >= bio->end) { - return 1; - } - *bio->bp++ = bio->buf >> 8; - return 0; -} - -static int bio_bytein(opj_bio_t *bio) { - bio->buf = (bio->buf << 8) & 0xffff; - bio->ct = bio->buf == 0xff00 ? 7 : 8; - if (bio->bp >= bio->end) { - return 1; - } - bio->buf |= *bio->bp++; - return 0; -} - -static void bio_putbit(opj_bio_t *bio, int b) { - if (bio->ct == 0) { - bio_byteout(bio); - } - bio->ct--; - bio->buf |= b << bio->ct; -} - -static int bio_getbit(opj_bio_t *bio) { - if (bio->ct == 0) { - bio_bytein(bio); - } - bio->ct--; - return (bio->buf >> bio->ct) & 1; -} - -/* -========================================================== - Bit Input/Output interface -========================================================== -*/ - -opj_bio_t* bio_create() { - opj_bio_t *bio = (opj_bio_t*)opj_malloc(sizeof(opj_bio_t)); - return bio; -} - -void bio_destroy(opj_bio_t *bio) { - if(bio) { - opj_free(bio); - } -} - -int bio_numbytes(opj_bio_t *bio) { - return (bio->bp - bio->start); -} - -void bio_init_enc(opj_bio_t *bio, unsigned char *bp, int len) { - bio->start = bp; - bio->end = bp + len; - bio->bp = bp; - bio->buf = 0; - bio->ct = 8; -} - -void bio_init_dec(opj_bio_t *bio, unsigned char *bp, int len) { - bio->start = bp; - bio->end = bp + len; - bio->bp = bp; - bio->buf = 0; - bio->ct = 0; -} - -void bio_write(opj_bio_t *bio, int v, int n) { - int i; - for (i = n - 1; i >= 0; i--) { - bio_putbit(bio, (v >> i) & 1); - } -} - -int bio_read(opj_bio_t *bio, int n) { - int i, v; - v = 0; - for (i = n - 1; i >= 0; i--) { - v += bio_getbit(bio) << i; - } - return v; -} - -int bio_flush(opj_bio_t *bio) { - bio->ct = 0; - if (bio_byteout(bio)) { - return 1; - } - if (bio->ct == 7) { - bio->ct = 0; - if (bio_byteout(bio)) { - return 1; - } - } - return 0; -} - -int bio_inalign(opj_bio_t *bio) { - bio->ct = 0; - if ((bio->buf & 0xff) == 0xff) { - if (bio_bytein(bio)) { - return 1; - } - bio->ct = 0; - } - return 0; -} +/* + * Copyright (c) 2001-2003, David Janssens + * Copyright (c) 2002-2003, Yannick Verschueren + * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe + * Copyright (c) 2005, Hervé Drolon, FreeImage Team + * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include "opj_includes.h" + +/** @defgroup BIO BIO - Individual bit input-output stream */ +/*@{*/ + +/** @name Local static functions */ +/*@{*/ + +/** +Write a bit +@param bio BIO handle +@param b Bit to write (0 or 1) +*/ +static void bio_putbit(opj_bio_t *bio, int b); +/** +Read a bit +@param bio BIO handle +@return Returns the read bit +*/ +static int bio_getbit(opj_bio_t *bio); +/** +Write a byte +@param bio BIO handle +@return Returns 0 if successful, returns 1 otherwise +*/ +static int bio_byteout(opj_bio_t *bio); +/** +Read a byte +@param bio BIO handle +@return Returns 0 if successful, returns 1 otherwise +*/ +static int bio_bytein(opj_bio_t *bio); + +/*@}*/ + +/*@}*/ + +/* +========================================================== + local functions +========================================================== +*/ + +static int bio_byteout(opj_bio_t *bio) { + bio->buf = (bio->buf << 8) & 0xffff; + bio->ct = bio->buf == 0xff00 ? 7 : 8; + if (bio->bp >= bio->end) { + return 1; + } + *bio->bp++ = bio->buf >> 8; + return 0; +} + +static int bio_bytein(opj_bio_t *bio) { + bio->buf = (bio->buf << 8) & 0xffff; + bio->ct = bio->buf == 0xff00 ? 7 : 8; + if (bio->bp >= bio->end) { + return 1; + } + bio->buf |= *bio->bp++; + return 0; +} + +static void bio_putbit(opj_bio_t *bio, int b) { + if (bio->ct == 0) { + bio_byteout(bio); + } + bio->ct--; + bio->buf |= b << bio->ct; +} + +static int bio_getbit(opj_bio_t *bio) { + if (bio->ct == 0) { + bio_bytein(bio); + } + bio->ct--; + return (bio->buf >> bio->ct) & 1; +} + +/* +========================================================== + Bit Input/Output interface +========================================================== +*/ + +opj_bio_t* bio_create() { + opj_bio_t *bio = (opj_bio_t*)opj_malloc(sizeof(opj_bio_t)); + return bio; +} + +void bio_destroy(opj_bio_t *bio) { + if(bio) { + opj_free(bio); + } +} + +int bio_numbytes(opj_bio_t *bio) { + return (bio->bp - bio->start); +} + +void bio_init_enc(opj_bio_t *bio, unsigned char *bp, int len) { + bio->start = bp; + bio->end = bp + len; + bio->bp = bp; + bio->buf = 0; + bio->ct = 8; +} + +void bio_init_dec(opj_bio_t *bio, unsigned char *bp, int len) { + bio->start = bp; + bio->end = bp + len; + bio->bp = bp; + bio->buf = 0; + bio->ct = 0; +} + +void bio_write(opj_bio_t *bio, int v, int n) { + int i; + for (i = n - 1; i >= 0; i--) { + bio_putbit(bio, (v >> i) & 1); + } +} + +int bio_read(opj_bio_t *bio, int n) { + int i, v; + v = 0; + for (i = n - 1; i >= 0; i--) { + v += bio_getbit(bio) << i; + } + return v; +} + +int bio_flush(opj_bio_t *bio) { + bio->ct = 0; + if (bio_byteout(bio)) { + return 1; + } + if (bio->ct == 7) { + bio->ct = 0; + if (bio_byteout(bio)) { + return 1; + } + } + return 0; +} + +int bio_inalign(opj_bio_t *bio) { + bio->ct = 0; + if ((bio->buf & 0xff) == 0xff) { + if (bio_bytein(bio)) { + return 1; + } + bio->ct = 0; + } + return 0; +}