VC++6.0实现的解码JP2000

		opj_dparameters_t parameters;	/* decompression parameters */
	opj_event_mgr_t event_mgr;		/* event manager */
	opj_image_t *image = NULL;
	FILE *fsrc = NULL;         // 源文件句柄
	unsigned char *src = NULL; // 存放源文件数据内存
	int file_length;           // 文件长度
	opj_dinfo_t* dinfo = NULL;	/* handle to a decompressor */
	opj_cio_t *cio = NULL;
//	opj_codestream_info_t cstr_info;  /* Codestream information structure */
//	char indexfilename[OPJ_PATH_LEN];	/* index file name */
//	char outfile[OPJ_PATH_LEN];

	// configure the event callbacks (not required) /
	memset(&event_mgr, 0, sizeof(opj_event_mgr_t));
//	event_mgr.error_handler = error_callback;
//	event_mgr.warning_handler = warning_callback;
//	event_mgr.info_handler = info_callback;

	// set decoding parameters to default values
	opj_set_default_decoder_parameters(?meters);

	image = NULL;

	CString fileName;
/////////////////////////////////////////////////////////////
	CFileDialog dlgFile(TRUE);
    CString title;
    CString strFilter, strDefault, strFilename;

    VERIFY(title.LoadString(AFX_IDS_OPENFILE));

    // 初始文件扩展名dat
    strFilter += "JP2 Files (*.jp2)";
    strFilter += (TCHAR)‘\0‘;
    strFilter += _T("*.jp2");
    strFilter += (TCHAR)‘\0‘;
    dlgFile.m_ofn.nMaxCustFilter++;

    CString allFilter;
    VERIFY(allFilter.LoadString(AFX_IDS_ALLFILTER));

    dlgFile.m_ofn.lpstrFilter = strFilter;
    dlgFile.m_ofn.lpstrTitle = title;
    dlgFile.m_ofn.lpstrFile = strFilename.GetBuffer(_MAX_PATH);
	dlgFile.m_ofn.lpstrInitialDir = "D:\\";

	// 显示文件选择对话框
    INT_PTR nResult = dlgFile.DoModal();

    // 如果文件打开则准备播放

    if (nResult == IDOK)
    {
		strFilename=dlgFile.GetPathName();
	   fileName = strFilename;
    }
    strFilename.ReleaseBuffer();
///////////////////////////////////////////////////////////////
	if(fileName != "")
	{
		fsrc = fopen(fileName, "rb");
		if (!fsrc)
			return ;
	}
	else
	{
		return;
	}
	// read the input file and put it in memory
	fseek(fsrc, 0, SEEK_END);
	file_length = ftell(fsrc);
	fseek(fsrc, 0, SEEK_SET);
	src = (unsigned char *) malloc(file_length);
	fread(src, 1, file_length, fsrc);
	fclose(fsrc);

	// decode the code-stream 

			// JPEG 2000 compressed image data
			// get a decoder handle
			dinfo = opj_create_decompress(CODEC_JP2);
			// 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 the current image and user parameters
			opj_setup_decoder(dinfo, ?meters);

			// open a byte stream
			cio = opj_cio_open((opj_common_ptr)dinfo, src, file_length);

			// decode the stream and fill the image structure
			image = opj_decode(dinfo, cio);
			if(!image)
			{
				//failed to decode image
				opj_destroy_decompress(dinfo);
				opj_cio_close(cio);
				return;
			}
			// close the byte stream
			opj_cio_close(cio);

	// free the memory containing the code-stream
	free(src);
	src = NULL;

	imagetoFile(image, "D:\\RGB.dat");//YUV422格式

	// free remaining structures
	if(dinfo)
		opj_destroy_decompress(dinfo);
// free codestream information structure
// if (*indexfilename)
//		opj_destroy_cstr_info(&cstr_info);
	// free image data structure
	opj_image_destroy(image);
	

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