API di masterizzazione di CD di Windows

Question

Dobbiamo masterizzare i file su CD in modo programmatico in un'applicazione C\C++ Windows XP/Vista che stiamo sviluppando utilizzando Borlands Turbo C++.

Qual è il modo più semplice e migliore per farlo?Preferiremmo un'API Windows nativa (che non si basi su MFC) in modo da non fare affidamento su software/driver di terze parti, se disponibili.

Answer 1

Abbiamo utilizzato quanto segue:

Memorizza i file nella directory restituita da GetBurnPath, quindi scrivi utilizzando Burn.GetCDRecordableInfo viene utilizzato per verificare quando il CD è pronto.

#include <stdio.h>
#include <imapi.h>
#include <windows.h>

struct MEDIAINFO {
    BYTE nSessions;
    BYTE nLastTrack;
    ULONG nStartAddress;
    ULONG nNextWritable;
    ULONG nFreeBlocks;
};
//==============================================================================
//  Description:    CD burning on Windows XP
//==============================================================================
#define CSIDL_CDBURN_AREA               0x003b
SHSTDAPI_(BOOL) SHGetSpecialFolderPathA(HWND hwnd, LPSTR pszPath, int csidl, BOOL fCreate);
SHSTDAPI_(BOOL) SHGetSpecialFolderPathW(HWND hwnd, LPWSTR pszPath, int csidl, BOOL fCreate);
#ifdef UNICODE
#define SHGetSpecialFolderPath  SHGetSpecialFolderPathW
#else
#define SHGetSpecialFolderPath  SHGetSpecialFolderPathA
#endif
//==============================================================================
// Interface IDiscMaster
const IID IID_IDiscMaster = {0x520CCA62,0x51A5,0x11D3,{0x91,0x44,0x00,0x10,0x4B,0xA1,0x1C,0x5E}};
const CLSID CLSID_MSDiscMasterObj = {0x520CCA63,0x51A5,0x11D3,{0x91,0x44,0x00,0x10,0x4B,0xA1,0x1C,0x5E}};

typedef interface ICDBurn ICDBurn;
// Interface ICDBurn
const IID IID_ICDBurn =    {0x3d73a659,0xe5d0,0x4d42,{0xaf,0xc0,0x51,0x21,0xba,0x42,0x5c,0x8d}};
const CLSID CLSID_CDBurn = {0xfbeb8a05,0xbeee,0x4442,{0x80,0x4e,0x40,0x9d,0x6c,0x45,0x15,0xe9}};

MIDL_INTERFACE("3d73a659-e5d0-4d42-afc0-5121ba425c8d")
ICDBurn : public IUnknown
{
public:
    virtual HRESULT STDMETHODCALLTYPE GetRecorderDriveLetter(
        /* [size_is][out] */ LPWSTR pszDrive,
        /* [in] */ UINT cch) = 0;

    virtual HRESULT STDMETHODCALLTYPE Burn(
        /* [in] */ HWND hwnd) = 0;

    virtual HRESULT STDMETHODCALLTYPE HasRecordableDrive(
        /* [out] */ BOOL *pfHasRecorder) = 0;
};
//==============================================================================
//  Description:    Get burn pathname
//  Parameters:     pathname - must be at least MAX_PATH in size
//  Returns:        Non-zero for an error
//  Notes:          CoInitialize(0) must be called once in application
//==============================================================================
int GetBurnPath(char *path)
{
    ICDBurn* pICDBurn;
    int ret = 0;

    if (SUCCEEDED(CoCreateInstance(CLSID_CDBurn, NULL,CLSCTX_INPROC_SERVER,IID_ICDBurn,(LPVOID*)&pICDBurn))) {
        BOOL flag;
        if (pICDBurn->HasRecordableDrive(&flag) == S_OK) {
            if (SHGetSpecialFolderPath(0, path, CSIDL_CDBURN_AREA, 0)) {
                strcat(path, "\\");
            }
            else {
                ret = 1;
            }
        }
        else {
            ret = 2;
        }
        pICDBurn->Release();
    }
    else {
        ret = 3;
    }
    return ret;
}
//==============================================================================
//  Description:    Get CD pathname
//  Parameters:     pathname - must be at least 5 bytes in size
//  Returns:        Non-zero for an error
//  Notes:          CoInitialize(0) must be called once in application
//==============================================================================
int GetCDPath(char *path)
{
    ICDBurn* pICDBurn;
    int ret = 0;

    if (SUCCEEDED(CoCreateInstance(CLSID_CDBurn, NULL,CLSCTX_INPROC_SERVER,IID_ICDBurn,(LPVOID*)&pICDBurn))) {
        BOOL flag;
        WCHAR drive[5];
        if (pICDBurn->GetRecorderDriveLetter(drive, 4) == S_OK) {
            sprintf(path, "%S", drive);
        }
        else {
            ret = 1;
        }
        pICDBurn->Release();
    }
    else {
        ret = 3;
    }
    return ret;
}
//==============================================================================
//  Description:    Burn CD
//  Parameters:     None
//  Returns:        Non-zero for an error
//  Notes:          CoInitialize(0) must be called once in application
//==============================================================================
int Burn(void)
{
    ICDBurn* pICDBurn;
    int ret = 0;

    if (SUCCEEDED(CoCreateInstance(CLSID_CDBurn, NULL,CLSCTX_INPROC_SERVER,IID_ICDBurn,(LPVOID*)&pICDBurn))) {
        if (pICDBurn->Burn(NULL) != S_OK) {
            ret = 1;
        }
        pICDBurn->Release();
    }
    else {
        ret = 2;
    }
    return ret;
}
//==============================================================================
bool GetCDRecordableInfo(long *FreeSpaceSize)
{
    bool Result = false;
    IDiscMaster *idm = NULL;
    IDiscRecorder *idr = NULL;
    IEnumDiscRecorders *pEnumDiscRecorders = NULL;
    ULONG cnt;
    long type;
    long mtype;
    long mflags;
    MEDIAINFO mi;

    try {
        CoCreateInstance(CLSID_MSDiscMasterObj, 0, CLSCTX_ALL, IID_IDiscMaster, (void**)&idm);
        idm->Open();
        idm->EnumDiscRecorders(&pEnumDiscRecorders);
        pEnumDiscRecorders->Next(1, &idr, &cnt);
        pEnumDiscRecorders->Release();

        idr->OpenExclusive();
        idr->GetRecorderType(&type);
        idr->QueryMediaType(&mtype, &mflags);
        idr->QueryMediaInfo(&mi.nSessions, &mi.nLastTrack, &mi.nStartAddress, &mi.nNextWritable, &mi.nFreeBlocks);
        idr->Release();

        idm->Close();
        idm->Release();
        Result = true;
    }
    catch (...) {
        Result = false;
    }

    if (Result == true) {
        Result = false;
        if (mtype == 0) {
            //  No Media inserted
            Result = false;
        }
        else {
            if ((mflags & 0x04) == 0x04) {
                // Writable Media
                Result = true;
            }
            else {
                Result = false;
            }

            if (Result == true) {
                *FreeSpaceSize = (mi.nFreeBlocks * 2048);
            }
            else {
                *FreeSpaceSize = 0;
            }
        }
    }

    return Result;
}

Answer 2

Per completare la risposta accettata, abbiamo aggiunto questa funzione di supporto per modificare al volo la directory di masterizzazione in modo programmatico poiché questo era un nostro requisito.

typedef HMODULE (WINAPI * SHSETFOLDERPATHA)( int , HANDLE , DWORD , LPCTSTR );

int SetBurnPath( char * cpPath )
{
    SHSETFOLDERPATHA pSHSetFolderPath;
    HANDLE hShell = LoadLibraryA( "shell32.dll" );
    if( hShell == NULL )
        return -2;

    DWORD dwOrdinal = 0x00000000 + 231;

    pSHSetFolderPath = (SHSETFOLDERPATHA)GetProcAddress( hShell, (LPCSTR)dwOrdinal );
    if( pSHSetFolderPath == NULL )
        return -3;

    if( pSHSetFolderPath( CSIDL_CDBURN_AREA, NULL, 0, cpPath ) == S_OK )
        return 0;

    return -1;
}

Answer 3

Queste sono le informazioni per IMAPI nel sito MSDN http://msdn.microsoft.com/en-us/library/aa939967.aspx

Answer 4

Dovresti essere in grado di utilizzare l'interfaccia ICDBurn della shell.Ai tempi di XP MFC non aveva nemmeno lezioni per la masterizzazione di CD.Vedo se riesco a trovare qualche esempio per te, ma è da un po' che non lo guardo.