diff options
Diffstat (limited to 'libopenjpeg/bio.c')
| -rw-r--r-- | libopenjpeg/bio.c | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/libopenjpeg/bio.c b/libopenjpeg/bio.c deleted file mode 100644 index 45e875f1..00000000 --- a/libopenjpeg/bio.c +++ /dev/null @@ -1,194 +0,0 @@ -/* - * Copyright (c) 2001-2002, David Janssens - * Copyright (c) 2003, Yannick Verschueren - * Copyright (c) 2003, 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 "bio.h" -#include <stdio.h> -#include <setjmp.h> - -static unsigned char *bio_start; /* pointer to the start of the buffer */ -static unsigned char *bio_end; /* pointer to the end of the buffer */ -static unsigned char *bio_bp; /* pointer to the present position in the buffer */ -static unsigned int bio_buf; /* temporary place where each byte is read or written */ -static int bio_ct; /* coder : number of bits free to write // decoder : number of bits read */ - -extern jmp_buf j2k_error; - -/* - * Number of bytes written. - */ -int bio_numbytes() -{ - return bio_bp - bio_start; -} - -/* - * Init encoder. - * - * bp : Output buffer - * len : Output buffer length - */ -void bio_init_enc(unsigned char *bp, int len) -{ - bio_start = bp; - bio_end = bp + len; - bio_bp = bp; - bio_buf = 0; - bio_ct = 8; -} - -/* - * Init decoder. - * - * bp : Input buffer - * len : Input buffer length - */ -void bio_init_dec(unsigned char *bp, int len) -{ - bio_start = bp; - bio_end = bp + len; - bio_bp = bp; - bio_buf = 0; - bio_ct = 0; -} - -/* - * Write byte. --> function modified to eliminate longjmp !!! - * - */ -int bio_byteout() -{ - 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; -} - -/* - * Read byte. --> function modified to eliminate longjmp !! - * - */ -int bio_bytein() -{ - 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; -} - -/* - * Write bit. - * - * b : Bit to write (0 or 1) - */ -void bio_putbit(int b) -{ - if (bio_ct == 0) { - bio_byteout(); - } - bio_ct--; - bio_buf |= b << bio_ct; -} - -/* - * Read bit. - * - */ -int bio_getbit() -{ - if (bio_ct == 0) { - bio_bytein(); - } - bio_ct--; - return (bio_buf >> bio_ct) & 1; -} - -/* - * Write bits. - * - * v : Value of bits - * n : Number of bits to write - */ -void bio_write(int v, int n) -{ - int i; - for (i = n - 1; i >= 0; i--) { - bio_putbit((v >> i) & 1); - } -} - -/* - * Read bits. - * - * n : Number of bits to read - */ -int bio_read(int n) -{ - int i, v; - v = 0; - for (i = n - 1; i >= 0; i--) { - v += bio_getbit() << i; - } - return v; -} - -/* - * Flush bits. Modified to eliminate longjmp !! - * - */ -int bio_flush() -{ - bio_ct = 0; - if (bio_byteout()) - return 1; - if (bio_ct == 7) { - bio_ct = 0; - - if (bio_byteout()) - return 1; - } - return 0; -} - -/* - * Passes the ending bits (coming from flushing) - */ -int bio_inalign() -{ - bio_ct = 0; - if ((bio_buf & 0xff) == 0xff) { - if (bio_bytein()) - return 1; - bio_ct = 0; - } - return 0; -} |