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-rwxr-xr-xlibopenjp3d/bio.c189
1 files changed, 0 insertions, 189 deletions
diff --git a/libopenjp3d/bio.c b/libopenjp3d/bio.c
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--- a/libopenjp3d/bio.c
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-/*
- * Copyright (c) 2001-2003, David Janssens
- * Copyright (c) 2002-2003, Yannick Verschueren
- * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
- * Copyright (c) 2005, Herve 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;
-}
-
-/* MOD antonin */
-static int bio_getbit(opj_bio_t *bio) {
-/* DOM */
- 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;
-}