From e21d8654402fc9e35e9fe18c68da63ce5a731140 Mon Sep 17 00:00:00 2001 From: Giuseppe Baruffa Date: Thu, 31 Jan 2008 14:36:06 +0000 Subject: In opjviewer, unification of JPEG 2000 family handlers (*.jp2, *.mj2, *.j2k) in a single file --- OPJViewer/source/imagmj2.cpp | 771 ------------------------------------------- 1 file changed, 771 deletions(-) delete mode 100644 OPJViewer/source/imagmj2.cpp (limited to 'OPJViewer/source/imagmj2.cpp') diff --git a/OPJViewer/source/imagmj2.cpp b/OPJViewer/source/imagmj2.cpp deleted file mode 100644 index 83ed8e1d..00000000 --- a/OPJViewer/source/imagmj2.cpp +++ /dev/null @@ -1,771 +0,0 @@ -/* - * Copyright (c) 2007, Digital Signal Processing Laboratory, Università degli studi di Perugia (UPG), Italy - * 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. - */ -///////////////////////////////////////////////////////////////////////////// -// Name: imagmj2.cpp -// Purpose: wxImage Motion JPEG 2000 file format handler -// Author: Giuseppe Baruffa - based on imagjpeg.cpp, Vaclav Slavik -// RCS-ID: $Id: imagmj2.cpp,v 0.00 2007/02/18 23:59:00 MW Exp $ -// Copyright: (c) Giuseppe Baruffa -// Licence: wxWindows licence -///////////////////////////////////////////////////////////////////////////// - -// For compilers that support precompilation, includes "wx.h". -#include "wx/wxprec.h" - -#ifdef __BORLANDC__ - #pragma hdrstop -#endif - -#if wxUSE_IMAGE && wxUSE_LIBOPENJPEG - -#include "imagmj2.h" - -#ifndef WX_PRECOMP - #include "wx/log.h" - #include "wx/app.h" - #include "wx/intl.h" - #include "wx/bitmap.h" - #include "wx/module.h" -#endif - - -#include "libopenjpeg/openjpeg.h" - - -#include "wx/filefn.h" -#include "wx/wfstream.h" - -// ---------------------------------------------------------------------------- -// types -// ---------------------------------------------------------------------------- - - -//----------------------------------------------------------------------------- -// wxMJ2Handler -//----------------------------------------------------------------------------- - -IMPLEMENT_DYNAMIC_CLASS(wxMJ2Handler,wxImageHandler) - -#if wxUSE_STREAMS - -//------------- JPEG 2000 Data Source Manager - -#define J2K_CFMT 0 -#define JP2_CFMT 1 -#define JPT_CFMT 2 -#define MJ2_CFMT 3 -#define PXM_DFMT 0 -#define PGX_DFMT 1 -#define BMP_DFMT 2 -#define YUV_DFMT 3 - -#define MAX_MESSAGE_LEN 200 - -/* sample error callback expecting a FILE* client object */ -void mj2_error_callback(const char *msg, void *client_data) { - int message_len = strlen(msg) - 1; - if (msg[message_len] != '\n') - message_len = MAX_MESSAGE_LEN; -#ifndef __WXGTK__ - wxMutexGuiEnter(); -#endif /* __WXGTK__ */ - wxLogMessage(wxT("[ERROR] %.*s"), message_len, msg); -#ifndef __WXGTK__ - wxMutexGuiLeave(); -#endif /* __WXGTK__ */ -} - -/* sample warning callback expecting a FILE* client object */ -void mj2_warning_callback(const char *msg, void *client_data) { - int message_len = strlen(msg) - 1; - if (msg[message_len] != '\n') - message_len = MAX_MESSAGE_LEN; -#ifndef __WXGTK__ - wxMutexGuiEnter(); -#endif /* __WXGTK__ */ - wxLogMessage(wxT("[WARNING] %.*s"), message_len, msg); -#ifndef __WXGTK__ - wxMutexGuiLeave(); -#endif /* __WXGTK__ */ -} - -/* sample debug callback expecting no client object */ -void mj2_info_callback(const char *msg, void *client_data) { - int message_len = strlen(msg) - 1; - if (msg[message_len] != '\n') - message_len = MAX_MESSAGE_LEN; -#ifndef __WXGTK__ - wxMutexGuiEnter(); -#endif /* __WXGTK__ */ - wxLogMessage(wxT("[INFO] %.*s"), message_len, msg); -#ifndef __WXGTK__ - wxMutexGuiLeave(); -#endif /* __WXGTK__ */ -} - -/* macro functions */ -/* From little endian to big endian, 2 and 4 bytes */ -#define BYTE_SWAP2(X) ((X & 0x00FF) << 8) | ((X & 0xFF00) >> 8) -#define BYTE_SWAP4(X) ((X & 0x000000FF) << 24) | ((X & 0x0000FF00) << 8) | ((X & 0x00FF0000) >> 8) | ((X & 0xFF000000) >> 24) - -#ifdef __WXGTK__ -#define BYTE_SWAP8(X) ((X & 0x00000000000000FFULL) << 56) | ((X & 0x000000000000FF00ULL) << 40) | \ - ((X & 0x0000000000FF0000ULL) << 24) | ((X & 0x00000000FF000000ULL) << 8) | \ - ((X & 0x000000FF00000000ULL) >> 8) | ((X & 0x0000FF0000000000ULL) >> 24) | \ - ((X & 0x00FF000000000000ULL) >> 40) | ((X & 0xFF00000000000000ULL) >> 56) -#else -#define BYTE_SWAP8(X) ((X & 0x00000000000000FF) << 56) | ((X & 0x000000000000FF00) << 40) | \ - ((X & 0x0000000000FF0000) << 24) | ((X & 0x00000000FF000000) << 8) | \ - ((X & 0x000000FF00000000) >> 8) | ((X & 0x0000FF0000000000) >> 24) | \ - ((X & 0x00FF000000000000) >> 40) | ((X & 0xFF00000000000000) >> 56) -#endif - -/* From codestream to int values */ -#define STREAM_TO_UINT32(C, P) (((unsigned long int) (C)[(P) + 0] << 24) + \ - ((unsigned long int) (C)[(P) + 1] << 16) + \ - ((unsigned long int) (C)[(P) + 2] << 8) + \ - ((unsigned long int) (C)[(P) + 3] << 0)) - -#define STREAM_TO_UINT16(C, P) (((unsigned long int) (C)[(P) + 0] << 8) + \ - ((unsigned long int) (C)[(P) + 1] << 0)) - -/* defines */ -#define SHORT_DESCR_LEN 32 -#define LONG_DESCR_LEN 256 - -/* enumeration for file formats */ -#define J2FILENUM 4 -typedef enum { - - JP2_FILE, - J2K_FILE, - MJ2_FILE, - UNK_FILE - -} my_j2filetype; - -/* enumeration for the box types */ -#define J2BOXNUM 23 -typedef enum { - - FILE_BOX, - JP_BOX, - FTYP_BOX, - JP2H_BOX, - IHDR_BOX, - COLR_BOX, - JP2C_BOX, - JP2I_BOX, - XML_BOX, - UUID_BOX, - UINF_BOX, - MOOV_BOX, - MVHD_BOX, - TRAK_BOX, - TKHD_BOX, - MDIA_BOX, - MINF_BOX, - STBL_BOX, - STSD_BOX, - MJP2_BOX, - MDAT_BOX, - ANY_BOX, - UNK_BOX - -} my_j2boxtype; - -/* jp2 family box signatures */ -#define FILE_SIGN "" -#define JP_SIGN "jP\040\040" -#define FTYP_SIGN "ftyp" -#define JP2H_SIGN "jp2h" -#define IHDR_SIGN "ihdr" -#define COLR_SIGN "colr" -#define JP2C_SIGN "jp2c" -#define JP2I_SIGN "jp2i" -#define XML_SIGN "xml\040" -#define UUID_SIGN "uuid" -#define UINF_SIGN "uinf" -#define MOOV_SIGN "moov" -#define MVHD_SIGN "mvhd" -#define TRAK_SIGN "trak" -#define TKHD_SIGN "tkhd" -#define MDIA_SIGN "mdia" -#define MINF_SIGN "minf" -#define VMHD_SIGN "vmhd" -#define STBL_SIGN "stbl" -#define STSD_SIGN "stsd" -#define MJP2_SIGN "mjp2" -#define MDAT_SIGN "mdat" -#define ANY_SIGN "" -#define UNK_SIGN "" - -/* the box structure itself */ -struct my_boxdef { - - char value[5]; /* hexadecimal value/string*/ - char name[SHORT_DESCR_LEN]; /* short description */ - char descr[LONG_DESCR_LEN]; /* long description */ - int sbox; /* is it a superbox? */ - int req[J2FILENUM]; /* mandatory box */ - my_j2boxtype ins; /* contained in box... */ - -}; - -/* the possible boxes */ -struct my_boxdef j2box[] = -{ -/* sign */ {FILE_SIGN, -/* short */ "placeholder for nothing", -/* long */ "Nothing to say", -/* sbox */ 0, -/* req */ {1, 1, 1}, -/* ins */ FILE_BOX}, - -/* sign */ {JP_SIGN, -/* short */ "JPEG 2000 Signature box", -/* long */ "This box uniquely identifies the file as being part of the JPEG 2000 family of files", -/* sbox */ 0, -/* req */ {1, 1, 1}, -/* ins */ FILE_BOX}, - -/* sign */ {FTYP_SIGN, -/* short */ "File Type box", -/* long */ "This box specifies file type, version and compatibility information, including specifying if this file " - "is a conforming JP2 file or if it can be read by a conforming JP2 reader", -/* sbox */ 0, -/* req */ {1, 1, 1}, -/* ins */ FILE_BOX}, - -/* sign */ {JP2H_SIGN, -/* short */ "JP2 Header box", -/* long */ "This box contains a series of boxes that contain header-type information about the file", -/* sbox */ 1, -/* req */ {1, 1, 1}, -/* ins */ FILE_BOX}, - -/* sign */ {IHDR_SIGN, -/* short */ "Image Header box", -/* long */ "This box specifies the size of the image and other related fields", -/* sbox */ 0, -/* req */ {1, 1, 1}, -/* ins */ JP2H_BOX}, - -/* sign */ {COLR_SIGN, -/* short */ "Colour Specification box", -/* long */ "This box specifies the colourspace of the image", -/* sbox */ 0, -/* req */ {1, 1, 1}, -/* ins */ JP2H_BOX}, - -/* sign */ {JP2C_SIGN, -/* short */ "Contiguous Codestream box", -/* long */ "This box contains the codestream as defined by Annex A", -/* sbox */ 0, -/* req */ {1, 1, 1}, -/* ins */ FILE_BOX}, - -/* sign */ {JP2I_SIGN, -/* short */ "Intellectual Property box", -/* long */ "This box contains intellectual property information about the image", -/* sbox */ 0, -/* req */ {0, 0, 0}, -/* ins */ FILE_BOX}, - -/* sign */ {XML_SIGN, -/* short */ "XML box", -/* long */ "This box provides a tool by which vendors can add XML formatted information to a JP2 file", -/* sbox */ 0, -/* req */ {0, 0, 0}, -/* ins */ FILE_BOX}, - -/* sign */ {UUID_SIGN, -/* short */ "UUID box", -/* long */ "This box provides a tool by which vendors can add additional information to a file " - "without risking conflict with other vendors", -/* sbox */ 0, -/* req */ {0, 0, 0}, -/* ins */ FILE_BOX}, - -/* sign */ {UINF_SIGN, -/* short */ "UUID Info box", -/* long */ "This box provides a tool by which a vendor may provide access to additional information associated with a UUID", -/* sbox */ 0, -/* req */ {0, 0, 0}, -/* ins */ FILE_BOX}, - -/* sign */ {MOOV_SIGN, -/* short */ "Movie box", -/* long */ "This box contains the media data. In video tracks, this box would contain JPEG2000 video frames", -/* sbox */ 1, -/* req */ {1, 1, 1}, -/* ins */ FILE_BOX}, - -/* sign */ {MVHD_SIGN, -/* short */ "Movie Header box", -/* long */ "This box defines overall information which is media-independent, and relevant to the entire presentation " - "considered as a whole", -/* sbox */ 0, -/* req */ {1, 1, 1}, -/* ins */ MOOV_BOX}, - -/* sign */ {TRAK_SIGN, -/* short */ "Track box", -/* long */ "This is a container box for a single track of a presentation. A presentation may consist of one or more tracks", -/* sbox */ 1, -/* req */ {1, 1, 1}, -/* ins */ MOOV_BOX}, - -/* sign */ {TKHD_SIGN, -/* short */ "Track Header box", -/* long */ "This box specifies the characteristics of a single track. Exactly one Track Header Box is contained in a track", -/* sbox */ 0, -/* req */ {1, 1, 1}, -/* ins */ TRAK_BOX}, - -/* sign */ {MDIA_SIGN, -/* short */ "Media box", -/* long */ "The media declaration container contains all the objects which declare information about the media data " - "within a track", -/* sbox */ 1, -/* req */ {1, 1, 1}, -/* ins */ TRAK_BOX}, - -/* sign */ {MINF_SIGN, -/* short */ "Media Information box", -/* long */ "This box contains all the objects which declare characteristic information of the media in the track", -/* sbox */ 1, -/* req */ {1, 1, 1}, -/* ins */ MDIA_BOX}, - -/* sign */ {STBL_SIGN, -/* short */ "Sample Table box", -/* long */ "The sample table contains all the time and data indexing of the media samples in a track", -/* sbox */ 1, -/* req */ {1, 1, 1}, -/* ins */ MINF_BOX}, - -/* sign */ {STSD_SIGN, -/* short */ "Sample Description box", -/* long */ "The sample description table gives detailed information about the coding type used, and any initialization " - "information needed for that coding", -/* sbox */ 0, -/* req */ {1, 1, 1}, -/* ins */ MINF_BOX}, - -/* sign */ {MJP2_SIGN, -/* short */ "MJP2 Sample Description box", -/* long */ "The MJP2 sample description table gives detailed information about the coding type used, and any initialization " - "information needed for that coding", -/* sbox */ 0, -/* req */ {1, 1, 1}, -/* ins */ MINF_BOX}, - -/* sign */ {MDAT_SIGN, -/* short */ "Media Data box", -/* long */ "The meta-data for a presentation is stored in the single Movie Box which occurs at the top-level of a file", -/* sbox */ 1, -/* req */ {1, 1, 1}, -/* ins */ FILE_BOX}, - -/* sign */ {ANY_SIGN, -/* short */ "Any box", -/* long */ "All the existing boxes", -/* sbox */ 0, -/* req */ {0, 0, 0}, -/* ins */ FILE_BOX}, - -/* sign */ {UNK_SIGN, -/* short */ "Unknown Type box", -/* long */ "The signature is not recognised to be that of an existing box", -/* sbox */ 0, -/* req */ {0, 0, 0}, -/* ins */ ANY_BOX} - -}; - -/* declaration */ -int -my_box_handler_function(my_j2boxtype boxtype, wxInputStream& stream, unsigned long int filepoint, unsigned long int filelimit, int level, - char *scansign, unsigned long int *scanpoint); - -#ifdef __WXMSW__ -typedef unsigned __int64 int8byte; -#endif // __WXMSW__ - -#ifdef __WXGTK__ -typedef unsigned long long int8byte; -#endif // __WXGTK__ - -/* internal mini-search for a box signature */ -int -my_jpeg2000parse(wxInputStream& stream, unsigned long int filepoint, unsigned long int filelimit, int level, - char *scansign, unsigned long int *scanpoint) -{ - unsigned long int LBox = 0x00000000; - //int LBox_read; - char TBox[5] = "\0\0\0\0"; - //int TBox_read; - int8byte XLBox = 0x0000000000000000; - //int XLBox_read; - unsigned long int box_length = 0; - int last_box = 0, box_num = 0; - int box_type = ANY_BOX; - unsigned char /*onebyte[1], twobytes[2],*/ fourbytes[4]; - int box_number = 0; - - /* cycle all over the file */ - box_num = 0; - last_box = 0; - while (!last_box) { - - /* do not exceed file limit */ - if (filepoint >= filelimit) - return (0); - - /* seek on file */ - if (stream.SeekI(filepoint, wxFromStart) == wxInvalidOffset) - return (-1); - - /* read the mandatory LBox, 4 bytes */ - if (!stream.Read(fourbytes, 4)) { - (wxT("Problem reading LBox from the file (file ended?)")); - return -1; - }; - LBox = STREAM_TO_UINT32(fourbytes, 0); - - /* read the mandatory TBox, 4 bytes */ - if (!stream.Read(TBox, 4)) { - wxLogError(wxT("Problem reading TBox from the file (file ended?)")); - return -1; - }; - - /* look if scansign is got */ - if ((scansign != NULL) && (memcmp(TBox, scansign, 4) == 0)) { - /* hack/exploit */ - // stop as soon as you find the level-th codebox - if (box_number == level) { - memcpy(scansign, " ", 4); - *scanpoint = filepoint; - return (0); - } else - box_number++; - - }; - - - /* determine the box type */ - for (box_type = JP_BOX; box_type < UNK_BOX; box_type++) - if (memcmp(TBox, j2box[box_type].value, 4) == 0) - break; - - /* read the optional XLBox, 8 bytes */ - if (LBox == 1) { - - if (!stream.Read(&XLBox, 8)) { - wxLogError(wxT("Problem reading XLBox from the file (file ended?)")); - return -1; - }; - box_length = (unsigned long int) BYTE_SWAP8(XLBox); - - } else if (LBox == 0x00000000) { - - /* last box in file */ - last_box = 1; - box_length = filelimit - filepoint; - - } else - - box_length = LBox; - - - /* go deep in the box */ - my_box_handler_function((my_j2boxtype) box_type, stream, (LBox == 1) ? (filepoint + 16) : (filepoint + 8), filepoint + box_length, level, - scansign, scanpoint); - - /* if it's a superbox go inside it */ - if (j2box[box_type].sbox) - my_jpeg2000parse(stream, (LBox == 1) ? (filepoint + 16) : (filepoint + 8), filepoint + box_length, - level, scansign, scanpoint); - - /* increment box number and filepoint*/ - box_num++; - filepoint += box_length; - - }; - - /* all good */ - return (0); -} - -// search first contiguos codestream box in an mj2 file -unsigned long int -searchjp2c(wxInputStream& stream, unsigned long int fsize, int number) -{ - char scansign[] = "jp2c"; - unsigned long int scanpoint = 0L; - - wxLogMessage(wxT("MJ2: searching jp2c box... ")); - - /* do the parsing */ - if (my_jpeg2000parse(stream, 0, fsize, number, scansign, &scanpoint) < 0) - wxLogMessage(wxT("MJ2: Unrecoverable error during file parsing: stopping")); - - if (strcmp(scansign, " ")) - wxLogMessage(wxT("MJ2: not found")); - else { - - wxLogMessage(wxString::Format(wxT("MJ2: found at byte %d"), scanpoint)); - - }; - - - return (scanpoint); -} - -// search the jp2h box in the file -unsigned long int -searchjpegheaderbox(wxInputStream& stream, unsigned long int fsize) -{ - char scansign[] = "jp2h"; - unsigned long int scanpoint = 0L; - - wxLogMessage(wxT("MJ2: searching jp2h box... ")); - - /* do the parsing */ - if (my_jpeg2000parse(stream, 0, fsize, 0, scansign, &scanpoint) < 0) - wxLogMessage(wxT("Unrecoverable error during file parsing: stopping")); - - if (strcmp(scansign, " ")) - wxLogMessage(wxT("MJ2: not found")); - else - wxLogMessage(wxString::Format(wxT("MJ2: found at byte %d"), scanpoint)); - - return (scanpoint); -} - -/* handling functions */ -#define ITEM_PER_ROW 10 - -/* Box handler function */ -int -my_box_handler_function(my_j2boxtype boxtype, wxInputStream& stream, unsigned long int filepoint, unsigned long int filelimit, int level, - char *scansign, unsigned long int *scanpoint) -{ - switch (boxtype) { - - /* Sample Description box */ - case (STSD_BOX): - my_jpeg2000parse(stream, filepoint + 8, filelimit, level, scansign, scanpoint); - break; - - /* MJP2 Sample Description box */ - case (MJP2_BOX): - my_jpeg2000parse(stream, filepoint + 78, filelimit, level, scansign, scanpoint); - break; - - /* not yet implemented */ - default: - break; - - }; - - return (0); -} - -// the jP and ftyp parts of the header -#define my_jPheadSIZE 32 -unsigned char my_jPhead[my_jPheadSIZE] = { - 0x00, 0x00, 0x00, 0x0C, 'j', 'P', ' ', ' ', - 0x0D, 0x0A, 0x87, 0x0A, 0x00, 0x00, 0x00, 0x14, - 'f', 't', 'y', 'p', 'j', 'p', '2', ' ', - 0x00, 0x00, 0x00, 0x00, 'j', 'p', '2', ' ' -}; - -///////////////////////////////////////////////// -///////////////////////////////////////////////// - -// load the mj2 file format -bool wxMJ2Handler::LoadFile(wxImage *image, wxInputStream& stream, bool verbose, int index) -{ - opj_dparameters_t parameters; /* decompression parameters */ - opj_event_mgr_t event_mgr; /* event manager */ - opj_image_t *opjimage = NULL; - unsigned char *src = NULL; - unsigned char *ptr; - int file_length, jp2c_point, jp2h_point; - unsigned long int jp2hboxlen, jp2cboxlen; - opj_codestream_info_t cstr_info; /* Codestream information structure */ - - // destroy the image - image->Destroy(); - - /* handle to a decompressor */ - opj_dinfo_t* dinfo = NULL; - opj_cio_t *cio = NULL; - - /* configure the event callbacks (not required) */ - memset(&event_mgr, 0, sizeof(opj_event_mgr_t)); - event_mgr.error_handler = mj2_error_callback; - event_mgr.warning_handler = mj2_warning_callback; - event_mgr.info_handler = mj2_info_callback; - - /* set decoding parameters to default values */ - opj_set_default_decoder_parameters(¶meters); - - /* prepare parameters */ - strncpy(parameters.infile, "", sizeof(parameters.infile)-1); - strncpy(parameters.outfile, "", sizeof(parameters.outfile)-1); - parameters.decod_format = JP2_CFMT; - parameters.cod_format = BMP_DFMT; - if (m_reducefactor) - parameters.cp_reduce = m_reducefactor; - if (m_qualitylayers) - parameters.cp_layer = m_qualitylayers; - /*if (n_components) - parameters. = n_components;*/ - - /* JPWL only */ -#ifdef USE_JPWL - parameters.jpwl_exp_comps = m_expcomps; - parameters.jpwl_max_tiles = m_maxtiles; - parameters.jpwl_correct = m_enablejpwl; -#endif /* USE_JPWL */ - - /* get a decoder handle */ - dinfo = opj_create_decompress(CODEC_JP2); - - /* find length of the stream */ - stream.SeekI(0, wxFromEnd); - file_length = (int) stream.TellI(); - - /* search for the first codestream box and the movie header box */ - jp2c_point = searchjp2c(stream, file_length, m_framenum); - jp2h_point = searchjpegheaderbox(stream, file_length); - - // read the jp2h box and store it - stream.SeekI(jp2h_point, wxFromStart); - stream.Read(&jp2hboxlen, sizeof(unsigned long int)); - jp2hboxlen = BYTE_SWAP4(jp2hboxlen); - - // read the jp2c box and store it - stream.SeekI(jp2c_point, wxFromStart); - stream.Read(&jp2cboxlen, sizeof(unsigned long int)); - jp2cboxlen = BYTE_SWAP4(jp2cboxlen); - - // malloc memory source - src = (unsigned char *) malloc(my_jPheadSIZE + jp2hboxlen + jp2cboxlen); - - // copy the jP and ftyp - memcpy(src, my_jPhead, my_jPheadSIZE); - - // copy the jp2h - stream.SeekI(jp2h_point, wxFromStart); - stream.Read(&src[my_jPheadSIZE], jp2hboxlen); - - // copy the jp2c - stream.SeekI(jp2c_point, wxFromStart); - stream.Read(&src[my_jPheadSIZE + jp2hboxlen], jp2cboxlen); - - /* catch events using our callbacks and give a local context */ - opj_set_event_mgr((opj_common_ptr)dinfo, &event_mgr, stderr); - - /* setup the decoder decoding parameters using user parameters */ - opj_setup_decoder(dinfo, ¶meters); - - /* open a byte stream */ - cio = opj_cio_open((opj_common_ptr)dinfo, src, my_jPheadSIZE + jp2hboxlen + jp2cboxlen); - - /* decode the stream and fill the image structure */ - opjimage = opj_decode_with_info(dinfo, cio, &cstr_info); - if (!opjimage) { - wxMutexGuiEnter(); - wxLogError(wxT("MJ2: failed to decode image!")); - wxMutexGuiLeave(); - opj_destroy_decompress(dinfo); - opj_cio_close(cio); - free(src); - return false; - } - - /* close the byte stream */ - opj_cio_close(cio); - - /* common rendering method */ -#include "imagjpeg2000.cpp" - - wxMutexGuiEnter(); - wxLogMessage(wxT("MJ2: image loaded.")); - wxMutexGuiLeave(); - - /* close openjpeg structs */ - opj_destroy_decompress(dinfo); - opj_image_destroy(opjimage); - free(src); - - if (!image->Ok()) - return false; - else - return true; - -} - -// save the mj2 file format -bool wxMJ2Handler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbose ) -{ - wxLogError(wxT("MJ2: Couldn't save movie -> not implemented.")); - return false; -} - -#ifdef __VISUALC__ - #pragma warning(default:4611) -#endif /* VC++ */ - -// recognize the Motion JPEG 2000 starting box -bool wxMJ2Handler::DoCanRead( wxInputStream& stream ) -{ - unsigned char hdr[24]; - - if ( !stream.Read(hdr, WXSIZEOF(hdr)) ) - return false; - - return (hdr[0] == 0x00 && - hdr[1] == 0x00 && - hdr[2] == 0x00 && - hdr[3] == 0x0C && - hdr[4] == 0x6A && - hdr[5] == 0x50 && - hdr[6] == 0x20 && - hdr[7] == 0x20 && - hdr[20] == 0x6D && - hdr[21] == 0x6A && - hdr[22] == 0x70 && - hdr[23] == 0x32); -} - -#endif // wxUSE_STREAMS - -#endif // wxUSE_LIBOPENJPEG -- cgit v1.2.3