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authorMathieu Malaterre <mathieu.malaterre@gmail.com>2012-09-28 08:11:41 +0000
committerMathieu Malaterre <mathieu.malaterre@gmail.com>2012-09-28 08:11:41 +0000
commitd518970039a19a2a9b6d2bdd592cc88a43897bbb (patch)
tree57bac2cf7e63e9352228231062763baac627563c /src/lib/openjp2/bio.h
parent8363a6ab1e031bb4b2e40a92e56efd40fdab1aa1 (diff)
[trunk] Start FolderReorgProposal task
Update issue 177
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+/*
+ * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
+ * Copyright (c) 2002-2007, Professor Benoit Macq
+ * Copyright (c) 2001-2003, David Janssens
+ * Copyright (c) 2002-2003, Yannick Verschueren
+ * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
+ * Copyright (c) 2005, Herve Drolon, FreeImage Team
+ * 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.
+ */
+
+#ifndef __BIO_H
+#define __BIO_H
+
+#include <stddef.h> /* ptrdiff_t */
+
+/**
+@file bio.h
+@brief Implementation of an individual bit input-output (BIO)
+
+The functions in BIO.C have for goal to realize an individual bit input - output.
+*/
+
+/** @defgroup BIO BIO - Individual bit input-output stream */
+/*@{*/
+
+/**
+Individual bit input-output stream (BIO)
+*/
+typedef struct opj_bio {
+ /** pointer to the start of the buffer */
+ OPJ_BYTE *start;
+ /** pointer to the end of the buffer */
+ OPJ_BYTE *end;
+ /** pointer to the present position in the buffer */
+ OPJ_BYTE *bp;
+ /** temporary place where each byte is read or written */
+ OPJ_UINT32 buf;
+ /** coder : number of bits free to write. decoder : number of bits read */
+ int ct;
+} opj_bio_t;
+
+/** @name Exported functions */
+/*@{*/
+/* ----------------------------------------------------------------------- */
+/**
+Create a new BIO handle
+@return Returns a new BIO handle if successful, returns NULL otherwise
+*/
+opj_bio_t* opj_bio_create(void);
+/**
+Destroy a previously created BIO handle
+@param bio BIO handle to destroy
+*/
+void opj_bio_destroy(opj_bio_t *bio);
+/**
+Number of bytes written.
+@param bio BIO handle
+@return Returns the number of bytes written
+*/
+ptrdiff_t bio_numbytes(opj_bio_t *bio);
+/**
+Init encoder
+@param bio BIO handle
+@param bp Output buffer
+@param len Output buffer length
+*/
+void bio_init_enc(opj_bio_t *bio, unsigned char *bp, int len);
+/**
+Init decoder
+@param bio BIO handle
+@param bp Input buffer
+@param len Input buffer length
+*/
+void bio_init_dec(opj_bio_t *bio, unsigned char *bp, int len);
+/**
+Write bits
+@param bio BIO handle
+@param v Value of bits
+@param n Number of bits to write
+*/
+void bio_write(opj_bio_t *bio, int v, int n);
+/**
+Read bits
+@param bio BIO handle
+@param n Number of bits to read
+@return Returns the corresponding read number
+*/
+int bio_read(opj_bio_t *bio, int n);
+/**
+Flush bits
+@param bio BIO handle
+@return Returns 1 if successful, returns 0 otherwise
+*/
+int bio_flush(opj_bio_t *bio);
+/**
+Passes the ending bits (coming from flushing)
+@param bio BIO handle
+@return Returns 1 if successful, returns 0 otherwise
+*/
+int bio_inalign(opj_bio_t *bio);
+/* ----------------------------------------------------------------------- */
+/*@}*/
+
+/*@}*/
+
+#endif /* __BIO_H */
+