// ========================================================================== // Class Implementation : COXJPEGCodec // ========================================================================== // Source file : OXJPGCod.cpp // Version: 9.3 // This software along with its related components, documentation and files ("The Libraries") // is © 1994-2007 The Code Project (1612916 Ontario Limited) and use of The Libraries is // governed by a software license agreement ("Agreement"). Copies of the Agreement are // available at The Code Project (www.codeproject.com), as part of the package you downloaded // to obtain this file, or directly from our office. For a copy of the license governing // this software, you may contact us at legalaffairs@codeproject.com, or by calling 416-849-8900. // ////////////////////////////////////////////////////////////////////////// #include "stdafx.h" #include "OXJPGCod.h" #include "OXJPGExp.h" // Special exception handling #include "UTBStrOp.h" #ifdef _DEBUG #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif #define new DEBUG_NEW #ifndef EXIT_FAILURE /* define exit() codes if not provided */ #define EXIT_FAILURE 1 #endif /* * Create the message string table. * We do this from the master message list in jerror.h by re-reading * jerror.h with a suitable definition for macro JMESSAGE. * The message table is made an external symbol just in case any applications * want to refer to it directly. */ #ifdef NEED_SHORT_EXTERNAL_NAMES #define jpeg_std_message_table jMsgTable #endif #define JMESSAGE(code,string) string , LPCTSTR const jpeg_std_message_table[] = { #include "jerror.h" NULL }; ///////////////////////////////////////////////////////////////////////////// // Definition of static members CMapPtrToPtr COXJPEGCodec::m_RunningCodecsMap; // Data members ------------------------------------------------------------- // protected: // CFile* m_pGraphFile; // --- // private: // Member functions --------------------------------------------------------- // public: COXJPEGCodec::COXJPEGCodec() { } #ifdef _DEBUG void COXJPEGCodec::Dump(CDumpContext& dc) const { CObject::Dump(dc); dc << TEXT("\nm_sWarnings : ") << m_sWarnings; void* pKey; void* pObject; POSITION pos = m_RunningCodecsMap.GetStartPosition(); while (pos != NULL) { m_RunningCodecsMap.GetNextAssoc(pos, pKey, pObject); dc << TEXT("\nItem in map :") << (void*)pKey << TEXT("-->")<< (void*)pObject << TEXT("\n"); } } void COXJPEGCodec::AssertValid() const { CObject::AssertValid(); } #endif COXJPEGCodec::~COXJPEGCodec() { } /* * Error exit handler: must not return to caller. * * Applications may override this if they want to get control back after * an error. Typically one would longjmp somewhere instead of exiting. * The setjmp buffer can be made a private field within an expanded error * handler object. Note that the info needed to generate an error message * is stored in the error object, so you can generate the message now or * later, at your convenience. * You should make sure that the JPEG object is cleaned up (with jpeg_abort * or jpeg_destroy) at some point. */ void COXJPEGCodec::error_exit (j_common_ptr cinfo) { void* pErrorCodec = NULL; m_RunningCodecsMap.Lookup(cinfo, pErrorCodec); if (pErrorCodec != NULL) ((COXJPEGCodec*)pErrorCodec)->ProcessError(cinfo); } /* * Actual output of an error or trace message. * Applications may override this method to send JPEG messages somewhere * other than stderr. */ void COXJPEGCodec::output_message(j_common_ptr cinfo) { void* pErrorCodec = NULL; m_RunningCodecsMap.Lookup(cinfo, pErrorCodec); if (pErrorCodec != NULL) ((COXJPEGCodec*)pErrorCodec)->OutputMessage(cinfo); } /* * Decide whether to emit a trace or warning message. * msg_level is one of: * -1: recoverable corrupt-data warning, may want to abort. * 0: important advisory messages (always display to user). * 1: first level of tracing detail. * 2,3,...: successively more detailed tracing messages. * An application might override this method if it wanted to abort on warnings * or change the policy about which messages to display. */ void COXJPEGCodec::emit_message(j_common_ptr cinfo, int msg_level) { void* pErrorCodec = NULL; m_RunningCodecsMap.Lookup(cinfo, pErrorCodec); if (pErrorCodec != NULL) ((COXJPEGCodec*)pErrorCodec)->EmitMessage(cinfo, msg_level); } /* * Format a message string for the most recent JPEG error or message. * The message is stored into buffer, which should be at least JMSG_LENGTH_MAX * characters. Note that no '\n' character is added to the string. * Few applications should need to override this method. */ void COXJPEGCodec::format_message(j_common_ptr cinfo, TCHAR* buffer) { void* pErrorCodec = NULL; m_RunningCodecsMap.Lookup(cinfo, pErrorCodec); if (pErrorCodec != NULL) ((COXJPEGCodec*)pErrorCodec)->FormatMessage(cinfo, buffer); } /* * Reset error state variables at start of a new image. * This is called during compression startup to reset trace/error * processing to default state, without losing any application-specific * method pointers. An application might possibly want to override * this method if it has additional error processing state. */ void COXJPEGCodec::reset_error_mgr(j_common_ptr cinfo) { void* pErrorCodec = NULL; m_RunningCodecsMap.Lookup(cinfo, pErrorCodec); if (pErrorCodec != NULL) ((COXJPEGCodec*)pErrorCodec)->ResetError(cinfo); } /* * Fill in the standard error-handling methods in a jpeg_error_mgr object. * Typical call is: * struct jpeg_compress_struct cinfo; * struct jpeg_error_mgr err; * * cinfo.err = jpeg_std_error(&err); * after which the application may override some of the methods. */ BOOL COXJPEGCodec::SetJPEGErrorHandling(struct jpeg_error_mgr* err) { err->error_exit = error_exit; err->emit_message = emit_message; err->output_message = output_message; err->format_message = format_message; err->reset_error_mgr = reset_error_mgr; err->trace_level = 0; /* default = no tracing */ err->num_warnings = 0; /* no warnings emitted yet */ err->msg_code = 0; /* may be useful as a flag for "no error" */ /* Initialize message table pointers */ err->jpeg_message_table = jpeg_std_message_table; err->last_jpeg_message = (int) JMSG_LASTMSGCODE - 1; err->addon_message_table = NULL; err->first_addon_message = 0; /* for safety */ err->last_addon_message = 0; return TRUE; } void COXJPEGCodec::OutputMessage(j_common_ptr cinfo) { TCHAR buffer[JMSG_LENGTH_MAX]; /* Create the message */ FormatMessage(cinfo, buffer); /* TRACE out in debug */ TRACE1("%s\n", buffer); m_sWarnings += ( CString(buffer) + CString("\n") ); return; } void COXJPEGCodec::ProcessError(j_common_ptr cinfo) { // Clean the map m_RunningCodecsMap.RemoveKey(cinfo); /* Always display the message */ OutputMessage(cinfo); /* Let the memory manager delete any temp files before we die */ jpeg_destroy(cinfo); TCHAR buffer[JMSG_LENGTH_MAX]; /* Create the message */ FormatMessage(cinfo, buffer); THROW(new COXJPEGException(cinfo->err->msg_code, buffer)); } void COXJPEGCodec::EmitMessage(j_common_ptr cinfo, int msg_level) { struct jpeg_error_mgr* err = cinfo->err; if (msg_level < 0) { /* It's a warning message. Since corrupt files may generate many warnings, * the policy implemented here is to show only the first warning, * unless trace_level >= 3. */ if (err->num_warnings == 0 || err->trace_level >= 3) OutputMessage(cinfo); /* Always count warnings in num_warnings. */ err->num_warnings++; } else { /* It's a trace message. Show it if trace_level >= msg_level. */ if (err->trace_level >= msg_level) OutputMessage(cinfo); } } void COXJPEGCodec::FormatMessage(j_common_ptr cinfo, LPTSTR buffer) { struct jpeg_error_mgr * err = cinfo->err; int msg_code = err->msg_code; LPCTSTR msgtext = NULL; LPCTSTR msgptr; TCHAR ch; jpeg_boolean isstring; /* Look up message string in proper table */ if (msg_code > 0 && msg_code <= err->last_jpeg_message) { msgtext = err->jpeg_message_table[msg_code]; } else if (err->addon_message_table != NULL && msg_code >= err->first_addon_message && msg_code <= err->last_addon_message) { msgtext = err->addon_message_table[msg_code - err->first_addon_message]; } /* Defend against bogus message number */ if (msgtext == NULL) { err->msg_parm.i[0] = msg_code; msgtext = err->jpeg_message_table[0]; } /* Check for string parameter, as indicated by %s in the message text */ isstring = FALSE; msgptr = msgtext; while ((ch = *msgptr++) != '\0') { if (ch == '%') { if (*msgptr == 's') isstring = TRUE; break; } } /* Format the message into the passed buffer */ if (isstring) UTBStr::stprintf(buffer, 2048, msgtext, err->msg_parm.s); else UTBStr::stprintf(buffer, 2048, msgtext, err->msg_parm.i[0], err->msg_parm.i[1], err->msg_parm.i[2], err->msg_parm.i[3], err->msg_parm.i[4], err->msg_parm.i[5], err->msg_parm.i[6], err->msg_parm.i[7]); } void COXJPEGCodec::ResetError(j_common_ptr cinfo) { cinfo->err->num_warnings = 0; /* trace_level is not reset since it is an application-supplied parameter */ cinfo->err->msg_code = 0; /* may be useful as a flag for "no error" */ m_sWarnings.Empty(); } ///////////////////////////////////////////////////////////////////////////