注：此前已经写了一系列分析MediaInfo源代码的文章，列表如下：
MediaInfo源代码分析 1：整体结构
MediaInfo源代码分析 2：API函数
MediaInfo源代码分析 3：Open()函数
MediaInfo源代码分析 4：Inform()函数
MediaInfo源代码分析 5：JPEG解析代码分析
===================
我们来看一下MediaInfo中的Open()函数的内部调用过程
首先open函数封装了MediaInfo_Internal类中的open()函数
//打开文件
size_t MediaInfo::Open(const String &File_Name_)
{
//封装了一层
return Internal->Open(File_Name_);
}
查看一下MediaInfo_Internal类中的open()函数的源代码：
//打开文件
size_t MediaInfo_Internal::Open(const String &File_Name_)
{
Close();
CS.Enter();
MEDIAINFO_DEBUG_CONFIG_TEXT(Debug+=__T("Open, File=");Debug+=Ztring(File_Name_).c_str();)
//清空文件列表
Config.File_Names.clear();
if (Config.File_FileNameFormat_Get()==__T("CSV"))
{
Config.File_Names.Separator_Set(0, __T(","));
Config.File_Names.Write(File_Name_);
}
//添加文件名到文件名列表
else if (!File_Name_.empty())
Config.File_Names.push_back(File_Name_);
if (Config.File_Names.empty())
{
CS.Leave();
return 0;
}
Config.File_Names_Pos=1;
CS.Leave();
//Parsing
//解析
if (BlockMethod==1)
{
if (!IsInThread) //If already created, the routine will read the new files
{
Run();
IsInThread=true;
}
return 0;
}
else
{
Entry(); //Normal parsing
return Count_Get(Stream_General);
}
}
在打开之前首先调用Close()进行清理，将文件路径添加到一个列表（实际上是一个Vector）中，调用Entry()进行解析。
查看一下Entry()函数的源代码：
//解析函数
void MediaInfo_Internal::Entry()
{
CS.Enter();
MEDIAINFO_DEBUG_CONFIG_TEXT(Debug+=__T("Entry");)
Config.State_Set(0);
CS.Leave();
//解析文件名（是否包含MMS？）
//需要libmms
if ((Config.File_Names[0].size()>=6
&& Config.File_Names[0][0]==__T('m')
&& Config.File_Names[0][1]==__T('m')
&& Config.File_Names[0][2]==__T('s')
&& Config.File_Names[0][3]==__T(':')
&& Config.File_Names[0][4]==__T('/')
&& Config.File_Names[0][5]==__T('/'))
|| (Config.File_Names[0].size()>=7
&& Config.File_Names[0][0]==__T('m')
&& Config.File_Names[0][1]==__T('m')
&& Config.File_Names[0][2]==__T('s')
&& Config.File_Names[0][3]==__T('h')
&& Config.File_Names[0][4]==__T(':')
&& Config.File_Names[0][5]==__T('/')
&& Config.File_Names[0][6]==__T('/')))
#if defined(MEDIAINFO_LIBMMS_YES)
Reader_libmms().Format_Test(this, Config.File_Names[0]);
#else //MEDIAINFO_LIBMMS_YES
{
#if MEDIAINFO_EVENTS
struct MediaInfo_Event_Log_0 Event;
Event.EventCode=MediaInfo_EventCode_Create(MediaInfo_Parser_None, MediaInfo_Event_Log, 0);
Event.Type=0xC0;
Event.Severity=0xFF;
Event.MessageCode=0;
Event.MessageStringU=L"Libmms cupport is disabled due to compilation options";
Event.MessageStringA="Libmms cupport is disabled due to compilation options";
MediaInfoLib::Config.Event_Send((const int8u*)&Event, sizeof(MediaInfo_Event_Log_0));
#endif //MEDIAINFO_EVENTS
}
#endif //MEDIAINFO_LIBMMS_YES
//是否包含网络协议？（标记为://）
//需要使用libcurl - the multiprotocol file transfer library
else if (Config.File_Names[0].find(__T("://"))!=string::npos)
#if defined(MEDIAINFO_LIBCURL_YES)
{
CS.Enter();
if (Reader)
{
CS.Leave();
return; //There is a problem
}
Reader=new Reader_libcurl();
CS.Leave();
Reader->Format_Test(this, Config.File_Names[0]);
#if MEDIAINFO_NEXTPACKET
if (Config.NextPacket_Get())
return;
#endif //MEDIAINFO_NEXTPACKET
}
#else //MEDIAINFO_LIBCURL_YES
{
#if MEDIAINFO_EVENTS
struct MediaInfo_Event_Log_0 Event;
Event.EventCode=MediaInfo_EventCode_Create(MediaInfo_Parser_None, MediaInfo_Event_Log, 0);
Event.Type=0xC0;
Event.Severity=0xFF;
Event.MessageCode=0;
Event.MessageStringU=L"Libcurl support is disabled due to compilation options";
Event.MessageStringA="Libcurl support is disabled due to compilation options";
MediaInfoLib::Config.Event_Send((const int8u*)&Event, sizeof(MediaInfo_Event_Log_0));
#endif //MEDIAINFO_EVENTS
}
#endif //MEDIAINFO_LIBCURL_YES
#if defined(MEDIAINFO_DIRECTORY_YES)
else if (Dir::Exists(Config.File_Names[0]))
Reader_Directory().Format_Test(this, Config.File_Names[0]);
#endif //MEDIAINFO_DIRECTORY_YES
//是普通文件，并且文件存在
#if defined(MEDIAINFO_FILE_YES)
else if (File::Exists(Config.File_Names[0]))
{
#if defined(MEDIAINFO_REFERENCES_YES)
string Dxw;
if (Config.File_CheckSideCarFiles_Get() && !Config.File_IsReferenced_Get())
{
//Zenlib中竟然包含专用于文件名操作的类！
FileName Test(Config.File_Names[0]);
//获得小写的文件名后缀
Ztring FileExtension=Test.Extension_Get();
FileExtension.MakeLowerCase();
//逐个比较（这些都是文本文件的后缀）
if (FileExtension!=__T("dfxp"))
{
Test.Extension_Set(__T("dfxp"));
if (File::Exists(Test))
Dxw+=" \r\n"
" \r\n");
Config.File_FileNameFormat_Set(__T("Dxw"));
}
}
//为空
if (Dxw.empty())
{
CS.Enter();
if (Reader)
{
CS.Leave();
return; //There is a problem
}
Reader=new Reader_File();
CS.Leave();
//测试格式
Reader->Format_Test(this, Config.File_Names[0]);
}
else
{
//初始化Buffer
Open_Buffer_Init(Dxw.size(), FileName(Config.File_Names[0]).Path_Get()+PathSeparator+FileName(Config.File_Names[0]).Name_Get());
Open_Buffer_Continue((const int8u*)Dxw.c_str(), Dxw.size());
Open_Buffer_Finalize();
}
#else //defined(MEDIAINFO_REFERENCES_YES)
CS.Enter();
if (Reader)
{
CS.Leave();
return; //There is a problem
}
Reader=new Reader_File();
CS.Leave();
Reader->Format_Test(this, Config.File_Names[0]);
#endif //defined(MEDIAINFO_REFERENCES_YES)
#if MEDIAINFO_NEXTPACKET
if (Config.NextPacket_Get())
return;
#endif //MEDIAINFO_NEXTPACKET
}
#endif //MEDIAINFO_FILE_YES
CS.Enter();
Config.State_Set(1);
CS.Leave();
}
我们可以看出，MediaInfo支持流媒体协议作为输入源（例如mms），但前提是要使用相应的库（libmms，或者libcurl）。它会首先查找文件路径中有没有“://”，判断是否是流媒体输入。
大多数情况下，我们使用本地文件路径作为输入源。这是我们就进入了代码中“#if defined(MEDIAINFO_FILE_YES) "部分下面的代码。具体每块代码的左右都写在代码注释中了，不再细说。最后使用 Reader_File的Format_Test()测试输入文件的格式。
看一下Reader_File的Format_Test()的源代码：
//用于测试文件格式
size_t Reader_File::Format_Test(MediaInfo_Internal* MI, String File_Name)
{
//std::cout<Open_Buffer_Init((int64u)-1, File_Name);
if (Format_Test_PerParser(MI, File_Name))
return 1;
return 0; //There is a problem
*/
//Get the Extension
//文件后缀
Ztring Extension=FileName::Extension_Get(File_Name);
Extension.MakeLowerCase();
//Search the theorical format from extension
InfoMap &FormatList=MediaInfoLib::Config.Format_Get();
InfoMap::iterator Format=FormatList.end();
if (!MI->Config.File_ForceParser_Get().empty())
Format=FormatList.find(MI->Config.File_ForceParser_Get());
if (Format==FormatList.end())
{
Format=FormatList.begin();
while (Format!=FormatList.end())
{
const Ztring &Extensions=FormatList.Get(Format->first, InfoFormat_Extensions);
if (Extensions.find(Extension)!=Error)
{
if(Extension.size()==Extensions.size())
break; //Only one extenion in the list
if(Extensions.find(Extension+__T(" "))!=Error
|| Extensions.find(__T(" ")+Extension)!=Error)
break;
}
++Format;
}
}
if (Format!=FormatList.end())
{
const Ztring &Parser=Format->second(InfoFormat_Parser);
if (MI->SelectFromExtension(Parser))
{
//Test the theorical format
if (Format_Test_PerParser(MI, File_Name)>0)
return 1;
}
}
//遍历所有支持格式，测试格式
size_t ToReturn=MI->ListFormats(File_Name);
return ToReturn;
}
可以看出，最后遍历了所有支持的格式，试图找出合适的格式。
最后我们看一下ListFormats()函数，用于找出匹配的格式。
由代码可见，遍历测试每一种支持的格式。
int MediaInfo_Internal::ListFormats(const String &File_Name)
{
// Multiple
// 看看这些格式都是否支持
//从上往下遍历
//如果遇到某一格式，返回值为1，便不再进行
//否则就进行下一个，直到遍历完
#if defined(MEDIAINFO_BDAV_YES)
delete Info; Info=new File_MpegTs(); ((File_MpegTs*)Info)->BDAV_Size=4; if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_BDMV_YES)
delete Info; Info=new File_Bdmv(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_CDXA_YES)
delete Info; Info=new File_Cdxa(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_DCP_YES)
delete Info; Info=new File_Dcp(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_DVDIF_YES)
delete Info; Info=new File_DvDif(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_DVDV_YES)
delete Info; Info=new File_Dvdv(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_DXW_YES)
delete Info; Info=new File_Dxw(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_FLV_YES)
//检测
delete Info; Info=new File_Flv(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_GXF_YES)
delete Info; Info=new File_Gxf(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_HLS_YES)
delete Info; Info=new File_Hls(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_IBI_YES)
delete Info; Info=new File_Ibi(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_ISM_YES)
delete Info; Info=new File_Ism(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_IVF_YES)
delete Info; Info=new File_Ivf(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_LXF_YES)
delete Info; Info=new File_Lxf(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_MK_YES)
delete Info; Info=new File_Mk(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_MPEG4_YES)
delete Info; Info=new File_Mpeg4(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_MPEGPS_YES)
delete Info; Info=new File_MpegPs(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_MPEGTS_YES)
delete Info; Info=new File_MpegTs(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_MPLI_YES)
delete Info; Info=new File_Mpli(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_MXF_YES)
delete Info; Info=new File_Mxf(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_NUT_YES)
delete Info; Info=new File_Nut(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_OGG_YES)
delete Info; Info=new File_Ogg(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_P2_YES)
delete Info; Info=new File_P2_Clip(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_PMP_YES)
delete Info; Info=new File_Pmp(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_RIFF_YES)
delete Info; Info=new File_Riff(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_RM_YES)
delete Info; Info=new File_Rm(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_SEQUENCEINFO_YES)
delete Info; Info=new File_SequenceInfo(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_SKM_YES)
delete Info; Info=new File_Skm(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_SWF_YES)
delete Info; Info=new File_Swf(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_TSP_YES)
delete Info; Info=new File_MpegTs(); ((File_MpegTs*)Info)->TSP_Size=16; if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_WM_YES)
delete Info; Info=new File_Wm(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_XDCAM_YES)
delete Info; Info=new File_Xdcam_Clip(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_DPG_YES)
delete Info; Info=new File_Dpg(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
// Video
#if defined(MEDIAINFO_AVC_YES)
delete Info; Info=new File_Avc(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_HEVC_YES)
delete Info; Info=new File_Hevc(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_AVSV_YES)
delete Info; Info=new File_AvsV(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_DIRAC_YES)
delete Info; Info=new File_Dirac(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_FLIC_YES)
delete Info; Info=new File_Flic(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_H263_YES)
delete Info; Info=new File_H263(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_MPEG4V_YES)
delete Info; Info=new File_Mpeg4v(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_MPEGV_YES)
delete Info; Info=new File_Mpegv(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_VC1_YES)
delete Info; Info=new File_Vc1(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_VC3_YES)
delete Info; Info=new File_Vc3(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_Y4M_YES)
delete Info; Info=new File_Y4m(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
// Audio
#if defined(MEDIAINFO_AAC_YES)
delete Info; Info=new File_Aac(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_AC3_YES)
delete Info; Info=new File_Ac3(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_SMPTEST0337_YES)
delete Info; Info=new File_SmpteSt0337(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_ALS_YES)
delete Info; Info=new File_Als(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_AMR_YES)
delete Info; Info=new File_Amr(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_AMV_YES)
delete Info; Info=new File_Amv(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_APE_YES)
delete Info; Info=new File_Ape(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_AU_YES)
delete Info; Info=new File_Au(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_DTS_YES)
delete Info; Info=new File_Dts(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
// Too many false-positives
// #if defined(MEDIAINFO_DOLBYE_YES)
// delete Info; Info=new File_DolbyE(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
// #endif
#if defined(MEDIAINFO_FLAC_YES)
delete Info; Info=new File_Flac(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_IT_YES)
delete Info; Info=new File_ImpulseTracker(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_LA_YES)
delete Info; Info=new File_La(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_MIDI_YES)
delete Info; Info=new File_Midi(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_MOD_YES)
delete Info; Info=new File_Module(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_MPC_YES)
delete Info; Info=new File_Mpc(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_MPCSV8_YES)
delete Info; Info=new File_MpcSv8(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_MPEGA_YES)
delete Info; Info=new File_Mpega(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_RKAU_YES)
delete Info; Info=new File_Rkau(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_TAK_YES)
delete Info; Info=new File_Tak(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_S3M_YES)
delete Info; Info=new File_ScreamTracker3(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_TTA_YES)
delete Info; Info=new File_Tta(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_TWINVQ_YES)
delete Info; Info=new File_TwinVQ(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_WVPK_YES)
delete Info; Info=new File_Wvpk(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_XM_YES)
delete Info; Info=new File_ExtendedModule(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
// Text
#if defined(MEDIAINFO_N19_YES)
delete Info; Info=new File_N19(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_SCC_YES)
delete Info; Info=new File_Scc(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_SUBRIP_YES)
delete Info; Info=new File_SubRip(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_TTML_YES)
delete Info; Info=new File_Ttml(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_OTHERTEXT_YES)
delete Info; Info=new File_OtherText(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
// Image
#if defined(MEDIAINFO_BMP_YES)
delete Info; Info=new File_Bmp(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_DPX_YES)
delete Info; Info=new File_Dpx(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_GIF_YES)
delete Info; Info=new File_Gif(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_ICO_YES)
delete Info; Info=new File_Ico(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_JPEG_YES)
delete Info; Info=new File_Jpeg(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_PCX_YES)
delete Info; Info=new File_Pcx(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_PNG_YES)
delete Info; Info=new File_Png(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_PSD_YES)
delete Info; Info=new File_Psd(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_TIFF_YES)
delete Info; Info=new File_Tiff(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_TGA_YES)
delete Info; Info=new File_Tga(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
// Archive
#if defined(MEDIAINFO_ACE_YES)
delete Info; Info=new File_Ace(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_7Z_YES)
delete Info; Info=new File_7z(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_BZIP2_YES)
delete Info; Info=new File_Bzip2(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_ELF_YES)
delete Info; Info=new File_Elf(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_GZIP_YES)
delete Info; Info=new File_Gzip(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_ISO9660_YES)
delete Info; Info=new File_Iso9660(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_MZ_YES)
delete Info; Info=new File_Mz(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_RAR_YES)
delete Info; Info=new File_Rar(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_TAR_YES)
delete Info; Info=new File_Tar(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
#if defined(MEDIAINFO_ZIP_YES)
delete Info; Info=new File_Zip(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
// Other
#if !defined(MEDIAINFO_OTHER_NO)
delete Info; Info=new File_Other(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
#endif
// Default (empty)
delete Info; Info=new File_Unknown(); if (((Reader_File*)Reader)->Format_Test_PerParser(this, File_Name)>0) return 1;
return 0;
}
至此Open()函数的分析完毕。