From cc07c64bdef46f4d25c2203e874f91ee94583f56 Mon Sep 17 00:00:00 2001 From: dan miller Date: Thu, 18 Oct 2007 08:29:49 +0000 Subject: one more time --- libraries/openjpeg-libsl/libopenjpeg/jpt.c | 155 +++++++++++++++++++++++++++++ 1 file changed, 155 insertions(+) create mode 100644 libraries/openjpeg-libsl/libopenjpeg/jpt.c (limited to 'libraries/openjpeg-libsl/libopenjpeg/jpt.c') diff --git a/libraries/openjpeg-libsl/libopenjpeg/jpt.c b/libraries/openjpeg-libsl/libopenjpeg/jpt.c new file mode 100644 index 0000000..a2566ea --- /dev/null +++ b/libraries/openjpeg-libsl/libopenjpeg/jpt.c @@ -0,0 +1,155 @@ +/* + * 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); + } +} -- cgit v1.1