763 lines
22 KiB
C++
763 lines
22 KiB
C++
/*
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* Copyright (c) 2007, Digital Signal Processing Laboratory, Università degli studi di Perugia (UPG), Italy
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/////////////////////////////////////////////////////////////////////////////
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// Name: imagmj2.cpp
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// Purpose: wxImage Motion JPEG 2000 file format handler
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// Author: Giuseppe Baruffa - based on imagjpeg.cpp, Vaclav Slavik
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// RCS-ID: $Id: imagmj2.cpp,v 0.00 2007/02/18 23:59:00 MW Exp $
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// Copyright: (c) Giuseppe Baruffa
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#if wxUSE_IMAGE && wxUSE_LIBOPENJPEG
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#include "imagmj2.h"
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#ifndef WX_PRECOMP
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#include "wx/log.h"
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#include "wx/app.h"
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#include "wx/intl.h"
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#include "wx/bitmap.h"
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#include "wx/module.h"
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#endif
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#include "libopenjpeg/openjpeg.h"
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#include "wx/filefn.h"
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#include "wx/wfstream.h"
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// ----------------------------------------------------------------------------
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// types
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// ----------------------------------------------------------------------------
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//-----------------------------------------------------------------------------
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// wxMJ2Handler
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//-----------------------------------------------------------------------------
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IMPLEMENT_DYNAMIC_CLASS(wxMJ2Handler,wxImageHandler)
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#if wxUSE_STREAMS
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//------------- JPEG 2000 Data Source Manager
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#define J2K_CFMT 0
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#define JP2_CFMT 1
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#define JPT_CFMT 2
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#define MJ2_CFMT 3
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#define PXM_DFMT 0
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#define PGX_DFMT 1
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#define BMP_DFMT 2
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#define YUV_DFMT 3
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#define MAX_MESSAGE_LEN 200
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/* sample error callback expecting a FILE* client object */
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void mj2_error_callback(const char *msg, void *client_data) {
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int message_len = strlen(msg) - 1;
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if (msg[message_len] != '\n')
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message_len = MAX_MESSAGE_LEN;
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#ifndef __WXGTK__
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wxMutexGuiEnter();
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#endif /* __WXGTK__ */
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wxLogMessage(wxT("[ERROR] %.*s"), message_len, msg);
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#ifndef __WXGTK__
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wxMutexGuiLeave();
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#endif /* __WXGTK__ */
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}
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/* sample warning callback expecting a FILE* client object */
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void mj2_warning_callback(const char *msg, void *client_data) {
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int message_len = strlen(msg) - 1;
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if (msg[message_len] != '\n')
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message_len = MAX_MESSAGE_LEN;
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#ifndef __WXGTK__
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wxMutexGuiEnter();
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#endif /* __WXGTK__ */
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wxLogMessage(wxT("[WARNING] %.*s"), message_len, msg);
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#ifndef __WXGTK__
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wxMutexGuiLeave();
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#endif /* __WXGTK__ */
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}
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/* sample debug callback expecting no client object */
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void mj2_info_callback(const char *msg, void *client_data) {
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int message_len = strlen(msg) - 1;
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if (msg[message_len] != '\n')
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message_len = MAX_MESSAGE_LEN;
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#ifndef __WXGTK__
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wxMutexGuiEnter();
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#endif /* __WXGTK__ */
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wxLogMessage(wxT("[INFO] %.*s"), message_len, msg);
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#ifndef __WXGTK__
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wxMutexGuiLeave();
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#endif /* __WXGTK__ */
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}
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/* macro functions */
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/* From little endian to big endian, 2 and 4 bytes */
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#define BYTE_SWAP2(X) ((X & 0x00FF) << 8) | ((X & 0xFF00) >> 8)
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#define BYTE_SWAP4(X) ((X & 0x000000FF) << 24) | ((X & 0x0000FF00) << 8) | ((X & 0x00FF0000) >> 8) | ((X & 0xFF000000) >> 24)
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#define BYTE_SWAP8(X) ((X & 0x00000000000000FF) << 56) | ((X & 0x000000000000FF00) << 40) | \
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((X & 0x0000000000FF0000) << 24) | ((X & 0x00000000FF000000) << 8) | \
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((X & 0x000000FF00000000) >> 8) | ((X & 0x0000FF0000000000) >> 24) | \
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((X & 0x00FF000000000000) >> 40) | ((X & 0xFF00000000000000) >> 56)
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/* From codestream to int values */
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#define STREAM_TO_UINT32(C, P) (((unsigned long int) (C)[(P) + 0] << 24) + \
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((unsigned long int) (C)[(P) + 1] << 16) + \
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((unsigned long int) (C)[(P) + 2] << 8) + \
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((unsigned long int) (C)[(P) + 3] << 0))
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#define STREAM_TO_UINT16(C, P) (((unsigned long int) (C)[(P) + 0] << 8) + \
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((unsigned long int) (C)[(P) + 1] << 0))
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/* defines */
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#define SHORT_DESCR_LEN 32
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#define LONG_DESCR_LEN 256
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/* enumeration for file formats */
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#define J2FILENUM 4
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typedef enum {
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JP2_FILE,
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J2K_FILE,
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MJ2_FILE,
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UNK_FILE
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} my_j2filetype;
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/* enumeration for the box types */
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#define J2BOXNUM 23
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typedef enum {
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FILE_BOX,
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JP_BOX,
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FTYP_BOX,
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JP2H_BOX,
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IHDR_BOX,
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COLR_BOX,
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JP2C_BOX,
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JP2I_BOX,
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XML_BOX,
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UUID_BOX,
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UINF_BOX,
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MOOV_BOX,
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MVHD_BOX,
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TRAK_BOX,
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TKHD_BOX,
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MDIA_BOX,
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MINF_BOX,
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STBL_BOX,
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STSD_BOX,
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MJP2_BOX,
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MDAT_BOX,
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ANY_BOX,
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UNK_BOX
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} my_j2boxtype;
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/* jp2 family box signatures */
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#define FILE_SIGN ""
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#define JP_SIGN "jP\040\040"
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#define FTYP_SIGN "ftyp"
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#define JP2H_SIGN "jp2h"
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#define IHDR_SIGN "ihdr"
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#define COLR_SIGN "colr"
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#define JP2C_SIGN "jp2c"
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#define JP2I_SIGN "jp2i"
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#define XML_SIGN "xml\040"
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#define UUID_SIGN "uuid"
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#define UINF_SIGN "uinf"
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#define MOOV_SIGN "moov"
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#define MVHD_SIGN "mvhd"
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#define TRAK_SIGN "trak"
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#define TKHD_SIGN "tkhd"
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#define MDIA_SIGN "mdia"
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#define MINF_SIGN "minf"
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#define VMHD_SIGN "vmhd"
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#define STBL_SIGN "stbl"
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#define STSD_SIGN "stsd"
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#define MJP2_SIGN "mjp2"
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#define MDAT_SIGN "mdat"
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#define ANY_SIGN ""
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#define UNK_SIGN ""
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/* the box structure itself */
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struct my_boxdef {
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char value[5]; /* hexadecimal value/string*/
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char name[SHORT_DESCR_LEN]; /* short description */
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char descr[LONG_DESCR_LEN]; /* long description */
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int sbox; /* is it a superbox? */
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int req[J2FILENUM]; /* mandatory box */
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my_j2boxtype ins; /* contained in box... */
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};
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/* the possible boxes */
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struct my_boxdef j2box[] =
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{
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/* sign */ {FILE_SIGN,
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/* short */ "placeholder for nothing",
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/* long */ "Nothing to say",
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/* sbox */ 0,
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/* req */ {1, 1, 1},
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/* ins */ FILE_BOX},
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/* sign */ {JP_SIGN,
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/* short */ "JPEG 2000 Signature box",
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/* long */ "This box uniquely identifies the file as being part of the JPEG 2000 family of files",
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/* sbox */ 0,
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/* req */ {1, 1, 1},
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/* ins */ FILE_BOX},
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/* sign */ {FTYP_SIGN,
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/* short */ "File Type box",
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/* long */ "This box specifies file type, version and compatibility information, including specifying if this file "
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"is a conforming JP2 file or if it can be read by a conforming JP2 reader",
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/* sbox */ 0,
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/* req */ {1, 1, 1},
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/* ins */ FILE_BOX},
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/* sign */ {JP2H_SIGN,
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/* short */ "JP2 Header box",
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/* long */ "This box contains a series of boxes that contain header-type information about the file",
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/* sbox */ 1,
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/* req */ {1, 1, 1},
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/* ins */ FILE_BOX},
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/* sign */ {IHDR_SIGN,
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/* short */ "Image Header box",
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/* long */ "This box specifies the size of the image and other related fields",
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/* sbox */ 0,
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/* req */ {1, 1, 1},
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/* ins */ JP2H_BOX},
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/* sign */ {COLR_SIGN,
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/* short */ "Colour Specification box",
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/* long */ "This box specifies the colourspace of the image",
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/* sbox */ 0,
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/* req */ {1, 1, 1},
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/* ins */ JP2H_BOX},
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/* sign */ {JP2C_SIGN,
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/* short */ "Contiguous Codestream box",
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/* long */ "This box contains the codestream as defined by Annex A",
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/* sbox */ 0,
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/* req */ {1, 1, 1},
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/* ins */ FILE_BOX},
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/* sign */ {JP2I_SIGN,
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/* short */ "Intellectual Property box",
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/* long */ "This box contains intellectual property information about the image",
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/* sbox */ 0,
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/* req */ {0, 0, 0},
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/* ins */ FILE_BOX},
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/* sign */ {XML_SIGN,
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/* short */ "XML box",
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/* long */ "This box provides a tool by which vendors can add XML formatted information to a JP2 file",
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/* sbox */ 0,
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/* req */ {0, 0, 0},
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/* ins */ FILE_BOX},
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/* sign */ {UUID_SIGN,
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/* short */ "UUID box",
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/* long */ "This box provides a tool by which vendors can add additional information to a file "
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"without risking conflict with other vendors",
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/* sbox */ 0,
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/* req */ {0, 0, 0},
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/* ins */ FILE_BOX},
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/* sign */ {UINF_SIGN,
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/* short */ "UUID Info box",
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/* long */ "This box provides a tool by which a vendor may provide access to additional information associated with a UUID",
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/* sbox */ 0,
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/* req */ {0, 0, 0},
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/* ins */ FILE_BOX},
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/* sign */ {MOOV_SIGN,
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/* short */ "Movie box",
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/* long */ "This box contains the media data. In video tracks, this box would contain JPEG2000 video frames",
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/* sbox */ 1,
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/* req */ {1, 1, 1},
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/* ins */ FILE_BOX},
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/* sign */ {MVHD_SIGN,
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/* short */ "Movie Header box",
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/* long */ "This box defines overall information which is media-independent, and relevant to the entire presentation "
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"considered as a whole",
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/* sbox */ 0,
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/* req */ {1, 1, 1},
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/* ins */ MOOV_BOX},
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/* sign */ {TRAK_SIGN,
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/* short */ "Track box",
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/* long */ "This is a container box for a single track of a presentation. A presentation may consist of one or more tracks",
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/* sbox */ 1,
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/* req */ {1, 1, 1},
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/* ins */ MOOV_BOX},
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/* sign */ {TKHD_SIGN,
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/* short */ "Track Header box",
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/* long */ "This box specifies the characteristics of a single track. Exactly one Track Header Box is contained in a track",
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/* sbox */ 0,
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/* req */ {1, 1, 1},
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/* ins */ TRAK_BOX},
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/* sign */ {MDIA_SIGN,
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/* short */ "Media box",
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/* long */ "The media declaration container contains all the objects which declare information about the media data "
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"within a track",
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/* sbox */ 1,
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/* req */ {1, 1, 1},
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/* ins */ TRAK_BOX},
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/* sign */ {MINF_SIGN,
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/* short */ "Media Information box",
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/* long */ "This box contains all the objects which declare characteristic information of the media in the track",
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/* sbox */ 1,
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/* req */ {1, 1, 1},
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/* ins */ MDIA_BOX},
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/* sign */ {STBL_SIGN,
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/* short */ "Sample Table box",
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/* long */ "The sample table contains all the time and data indexing of the media samples in a track",
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/* sbox */ 1,
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/* req */ {1, 1, 1},
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/* ins */ MINF_BOX},
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/* sign */ {STSD_SIGN,
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/* short */ "Sample Description box",
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/* long */ "The sample description table gives detailed information about the coding type used, and any initialization "
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"information needed for that coding",
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/* sbox */ 0,
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/* req */ {1, 1, 1},
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/* ins */ MINF_BOX},
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/* sign */ {MJP2_SIGN,
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/* short */ "MJP2 Sample Description box",
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/* long */ "The MJP2 sample description table gives detailed information about the coding type used, and any initialization "
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"information needed for that coding",
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/* sbox */ 0,
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/* req */ {1, 1, 1},
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/* ins */ MINF_BOX},
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/* sign */ {MDAT_SIGN,
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/* short */ "Media Data box",
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/* long */ "The meta-data for a presentation is stored in the single Movie Box which occurs at the top-level of a file",
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/* sbox */ 1,
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/* req */ {1, 1, 1},
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/* ins */ FILE_BOX},
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/* sign */ {ANY_SIGN,
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/* short */ "Any box",
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/* long */ "All the existing boxes",
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/* sbox */ 0,
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/* req */ {0, 0, 0},
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/* ins */ FILE_BOX},
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/* sign */ {UNK_SIGN,
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/* short */ "Unknown Type box",
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/* long */ "The signature is not recognised to be that of an existing box",
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/* sbox */ 0,
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/* req */ {0, 0, 0},
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/* ins */ ANY_BOX}
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};
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/* declaration */
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int
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my_box_handler_function(my_j2boxtype boxtype, wxInputStream& stream, unsigned long int filepoint, unsigned long int filelimit, int level,
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char *scansign, unsigned long int *scanpoint);
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#ifdef __WXMSW__
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typedef unsigned __int64 int8byte;
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#endif // __WXMSW__
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#ifdef __WXGTK__
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typedef unsigned long long int8byte;
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#endif // __WXGTK__
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/* internal mini-search for a box signature */
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int
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my_jpeg2000parse(wxInputStream& stream, unsigned long int filepoint, unsigned long int filelimit, int level,
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char *scansign, unsigned long int *scanpoint)
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{
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unsigned long int LBox = 0x00000000;
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//int LBox_read;
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char TBox[5] = "\0\0\0\0";
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//int TBox_read;
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int8byte XLBox = 0x0000000000000000;
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//int XLBox_read;
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unsigned long int box_length = 0;
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int last_box = 0, box_num = 0;
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int box_type = ANY_BOX;
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unsigned char /*onebyte[1], twobytes[2],*/ fourbytes[4];
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int box_number = 0;
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/* cycle all over the file */
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box_num = 0;
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last_box = 0;
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while (!last_box) {
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/* do not exceed file limit */
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if (filepoint >= filelimit)
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return (0);
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/* seek on file */
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if (stream.SeekI(filepoint, wxFromStart) == wxInvalidOffset)
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return (-1);
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/* read the mandatory LBox, 4 bytes */
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if (!stream.Read(fourbytes, 4)) {
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(wxT("Problem reading LBox from the file (file ended?)"));
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return -1;
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};
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LBox = STREAM_TO_UINT32(fourbytes, 0);
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/* read the mandatory TBox, 4 bytes */
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if (!stream.Read(TBox, 4)) {
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wxLogError(wxT("Problem reading TBox from the file (file ended?)"));
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return -1;
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};
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/* look if scansign is got */
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if ((scansign != NULL) && (memcmp(TBox, scansign, 4) == 0)) {
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/* hack/exploit */
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// stop as soon as you find the level-th codebox
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if (box_number == level) {
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memcpy(scansign, " ", 4);
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*scanpoint = filepoint;
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return (0);
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} else
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box_number++;
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};
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/* determine the box type */
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for (box_type = JP_BOX; box_type < UNK_BOX; box_type++)
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if (memcmp(TBox, j2box[box_type].value, 4) == 0)
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break;
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/* read the optional XLBox, 8 bytes */
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if (LBox == 1) {
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if (!stream.Read(&XLBox, 8)) {
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wxLogError(wxT("Problem reading XLBox from the file (file ended?)"));
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return -1;
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};
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box_length = (unsigned long int) BYTE_SWAP8(XLBox);
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} else if (LBox == 0x00000000) {
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/* last box in file */
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last_box = 1;
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box_length = filelimit - filepoint;
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} else
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box_length = LBox;
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/* go deep in the box */
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my_box_handler_function((my_j2boxtype) box_type, stream, (LBox == 1) ? (filepoint + 16) : (filepoint + 8), filepoint + box_length, level,
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scansign, scanpoint);
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/* if it's a superbox go inside it */
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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;
|
|
|
|
// 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(dinfo, cio);
|
|
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
|