156 lines
4.5 KiB
C
Executable File
156 lines
4.5 KiB
C
Executable File
/*
|
|
* Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
|
|
* Copyright (c) 2002-2007, Professor Benoit Macq
|
|
* Copyright (c) 2002-2003, Yannick Verschueren
|
|
* 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.
|
|
*/
|
|
|
|
#include "opj_includes.h"
|
|
|
|
/*
|
|
* Read the information contains in VBAS [JPP/JPT stream message header]
|
|
* Store information (7 bits) in value
|
|
*
|
|
*/
|
|
unsigned int jpt_read_VBAS_info(opj_cio_t *cio, unsigned int value) {
|
|
unsigned char elmt;
|
|
|
|
elmt = cio_read(cio, 1);
|
|
while ((elmt >> 7) == 1) {
|
|
value = (value << 7);
|
|
value |= (elmt & 0x7f);
|
|
elmt = cio_read(cio, 1);
|
|
}
|
|
value = (value << 7);
|
|
value |= (elmt & 0x7f);
|
|
|
|
return value;
|
|
}
|
|
|
|
/*
|
|
* Initialize the value of the message header structure
|
|
*
|
|
*/
|
|
void jpt_init_msg_header(opj_jpt_msg_header_t * header) {
|
|
header->Id = 0; /* In-class Identifier */
|
|
header->last_byte = 0; /* Last byte information */
|
|
header->Class_Id = 0; /* Class Identifier */
|
|
header->CSn_Id = 0; /* CSn : index identifier */
|
|
header->Msg_offset = 0; /* Message offset */
|
|
header->Msg_length = 0; /* Message length */
|
|
header->Layer_nb = 0; /* Auxiliary for JPP case */
|
|
}
|
|
|
|
/*
|
|
* Re-initialize the value of the message header structure
|
|
*
|
|
* Only parameters always present in message header
|
|
*
|
|
*/
|
|
void jpt_reinit_msg_header(opj_jpt_msg_header_t * header) {
|
|
header->Id = 0; /* In-class Identifier */
|
|
header->last_byte = 0; /* Last byte information */
|
|
header->Msg_offset = 0; /* Message offset */
|
|
header->Msg_length = 0; /* Message length */
|
|
}
|
|
|
|
/*
|
|
* Read the message header for a JPP/JPT - stream
|
|
*
|
|
*/
|
|
void jpt_read_msg_header(opj_common_ptr cinfo, opj_cio_t *cio, opj_jpt_msg_header_t *header) {
|
|
unsigned char elmt, Class = 0, CSn = 0;
|
|
jpt_reinit_msg_header(header);
|
|
|
|
/* ------------- */
|
|
/* VBAS : Bin-ID */
|
|
/* ------------- */
|
|
elmt = cio_read(cio, 1);
|
|
|
|
/* See for Class and CSn */
|
|
switch ((elmt >> 5) & 0x03) {
|
|
case 0:
|
|
opj_event_msg(cinfo, EVT_ERROR, "Forbidden value encounter in message header !!\n");
|
|
break;
|
|
case 1:
|
|
Class = 0;
|
|
CSn = 0;
|
|
break;
|
|
case 2:
|
|
Class = 1;
|
|
CSn = 0;
|
|
break;
|
|
case 3:
|
|
Class = 1;
|
|
CSn = 1;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* see information on bits 'c' [p 10 : A.2.1 general, ISO/IEC FCD 15444-9] */
|
|
if (((elmt >> 4) & 0x01) == 1)
|
|
header->last_byte = 1;
|
|
|
|
/* In-class identifier */
|
|
header->Id |= (elmt & 0x0f);
|
|
if ((elmt >> 7) == 1)
|
|
header->Id = jpt_read_VBAS_info(cio, header->Id);
|
|
|
|
/* ------------ */
|
|
/* VBAS : Class */
|
|
/* ------------ */
|
|
if (Class == 1) {
|
|
header->Class_Id = 0;
|
|
header->Class_Id = jpt_read_VBAS_info(cio, header->Class_Id);
|
|
}
|
|
|
|
/* ---------- */
|
|
/* VBAS : CSn */
|
|
/* ---------- */
|
|
if (CSn == 1) {
|
|
header->CSn_Id = 0;
|
|
header->CSn_Id = jpt_read_VBAS_info(cio, header->CSn_Id);
|
|
}
|
|
|
|
/* ----------------- */
|
|
/* VBAS : Msg_offset */
|
|
/* ----------------- */
|
|
header->Msg_offset = jpt_read_VBAS_info(cio, header->Msg_offset);
|
|
|
|
/* ----------------- */
|
|
/* VBAS : Msg_length */
|
|
/* ----------------- */
|
|
header->Msg_length = jpt_read_VBAS_info(cio, header->Msg_length);
|
|
|
|
/* ---------- */
|
|
/* VBAS : Aux */
|
|
/* ---------- */
|
|
if ((header->Class_Id & 0x01) == 1) {
|
|
header->Layer_nb = 0;
|
|
header->Layer_nb = jpt_read_VBAS_info(cio, header->Layer_nb);
|
|
}
|
|
}
|