vlccontrol.cpp

VLC Player Source Code

                {
                    libvlc_toggle_fullscreen(p_md, NULL);
                    libvlc_media_player_release(p_md);
                }
            }
        }
    }
    return result;
};

STDMETHODIMP VLCControl::get_Length(int *seconds)
{
    if( NULL == seconds )
        return E_POINTER;
    *seconds = 0;

    libvlc_instance_t* p_libvlc;
    HRESULT result = _p_instance->getVLC(&p_libvlc);
    if( SUCCEEDED(result) )
    {
        libvlc_exception_t ex;
        libvlc_exception_init(&ex);

        libvlc_media_player_t *p_md;
        p_md = libvlc_playlist_get_media_player(p_libvlc, &ex);
        if( ! libvlc_exception_raised(&ex) )
        {
            *seconds = (double)libvlc_media_player_get_length(p_md, &ex);
            libvlc_media_player_release(p_md);
            if( ! libvlc_exception_raised(&ex) )
            {
                return NOERROR;
            }
        }
        _p_instance->setErrorInfo(IID_IVLCControl,
                     libvlc_exception_get_message(&ex));
        libvlc_exception_clear(&ex);
        return E_FAIL;
    }
    return result;

};

STDMETHODIMP VLCControl::playFaster(void)
{
    int32_t rate = 2;

    HRESULT result = E_UNEXPECTED;
    if( !_p_instance->isRunning() )
        return result;

    libvlc_instance_t* p_libvlc;
    result = _p_instance->getVLC(&p_libvlc);
    if( SUCCEEDED(result) )
    {
        libvlc_exception_t ex;
        libvlc_exception_init(&ex);

        libvlc_media_player_t *p_md;
        p_md = libvlc_playlist_get_media_player(p_libvlc, &ex);
        if( ! libvlc_exception_raised(&ex) )
        {
            libvlc_media_player_set_rate(p_md, rate, &ex);
            libvlc_media_player_release(p_md);
            if( ! libvlc_exception_raised(&ex) )
            {
                return NOERROR;
            }
        }
        _p_instance->setErrorInfo(IID_IVLCControl,
                     libvlc_exception_get_message(&ex));
        libvlc_exception_clear(&ex);
        return E_FAIL;
    }
    return result;
};

STDMETHODIMP VLCControl::playSlower(void)
{
    float rate = 0.5;

    HRESULT result = E_UNEXPECTED;
    if( !_p_instance->isRunning() )
        return result;

    libvlc_instance_t* p_libvlc;
    result = _p_instance->getVLC(&p_libvlc);
    if( SUCCEEDED(result) )
    {
        libvlc_exception_t ex;
        libvlc_exception_init(&ex);

        libvlc_media_player_t *p_md;
        p_md = libvlc_playlist_get_media_player(p_libvlc, &ex);
        if( ! libvlc_exception_raised(&ex) )
        {
            libvlc_media_player_set_rate(p_md, rate, &ex);
            libvlc_media_player_release(p_md);
            if( ! libvlc_exception_raised(&ex) )
            {
                return NOERROR;
            }
        }
        _p_instance->setErrorInfo(IID_IVLCControl,
                     libvlc_exception_get_message(&ex));
        libvlc_exception_clear(&ex);
        return E_FAIL;
    }
    return result;
};

STDMETHODIMP VLCControl::get_Volume(int *volume)
{
    if( NULL == volume )
        return E_POINTER;

    *volume  = _p_instance->getVolume();
    return NOERROR;
};

STDMETHODIMP VLCControl::put_Volume(int volume)
{
    _p_instance->setVolume(volume);
    return NOERROR;
};

STDMETHODIMP VLCControl::toggleMute(void)
{
    libvlc_instance_t* p_libvlc;
    HRESULT result = _p_instance->getVLC(&p_libvlc);
    if( SUCCEEDED(result) )
    {
        libvlc_exception_t ex;
        libvlc_exception_init(&ex);

        libvlc_audio_toggle_mute(p_libvlc, &ex);
        if( libvlc_exception_raised(&ex) )
        {
            _p_instance->setErrorInfo(IID_IVLCControl,
                         libvlc_exception_get_message(&ex));
            libvlc_exception_clear(&ex);
            return E_FAIL;
        }
        return NOERROR;
    }
    return result;
};

STDMETHODIMP VLCControl::setVariable(BSTR name, VARIANT value)
{
    libvlc_instance_t* p_libvlc;
    HRESULT result = _p_instance->getVLC(&p_libvlc);
    if( SUCCEEDED(result) )
    {
        _p_instance->setErrorInfo(IID_IVLCControl,
            "setVariable() is an unsafe interface to use. "
            "It has been removed because of security implications." );
    }
    return E_FAIL;
};

STDMETHODIMP VLCControl::getVariable(BSTR name, VARIANT *value)
{
    libvlc_instance_t* p_libvlc;
    HRESULT result = _p_instance->getVLC(&p_libvlc);
    if( SUCCEEDED(result) )
    {
        _p_instance->setErrorInfo(IID_IVLCControl,
            "getVariable() is an unsafe interface to use. "
            "It has been removed because of security implications." );
    }
    return E_FAIL;
};

void VLCControl::FreeTargetOptions(char **cOptions, int cOptionCount)
{
    // clean up
    if( NULL != cOptions )
    {
        for( int pos=0; pos<cOptionCount; ++pos )
        {
            char *cOption = cOptions[pos];
            if( NULL != cOption )
                CoTaskMemFree(cOption);
            else
                break;
        }
        CoTaskMemFree(cOptions);
    }
};

static HRESULT parseStringOptions(int codePage, BSTR bstr, char*** cOptions, int *cOptionCount)
{
    HRESULT hr = E_INVALIDARG;
    if( SysStringLen(bstr) > 0 )
    {
        hr = E_OUTOFMEMORY;
        char *s = CStrFromBSTR(codePage, bstr);
        char *val = s;
        if( val )
        {
            long capacity = 16;
            char **options = (char **)CoTaskMemAlloc(capacity*sizeof(char *));
            if( options )
            {
                int nOptions = 0;

                char *end = val + strlen(val);
                while( val < end )
                {
                    // skip leading blanks
                    while( (val < end)
                        && ((*val == ' ' ) || (*val == '\t')) )
                        ++val;

                    char *start = val;
                    // skip till we get a blank character
                    while( (val < end)
                        && (*val != ' ' )
                        && (*val != '\t') )
                    {
                        char c = *(val++);
                        if( ('\'' == c) || ('"' == c) )
                        {
                            // skip till end of string
                            while( (val < end) && (*(val++) != c ) );
                        }
                    }

                    if( val > start )
                    {
                        if( nOptions == capacity )
                        {
                            capacity += 16;
                            char **moreOptions = (char **)CoTaskMemRealloc(options, capacity*sizeof(char*));
                            if( ! moreOptions )
                            {
                                /* failed to allocate more memory */
                                CoTaskMemFree(s);
                                /* return what we got so far */
                                *cOptionCount = nOptions;
                                *cOptions = options;
                                return NOERROR;
                            }
                            options = moreOptions;
                        }
                        *(val++) = '\0';
                        options[nOptions] = (char *)CoTaskMemAlloc(val-start);
                        if( options[nOptions] )
                        {
                            memcpy(options[nOptions], start, val-start);
                            ++nOptions;
                        }
                        else
                        {
                            /* failed to allocate memory */
                            CoTaskMemFree(s);
                            /* return what we got so far */
                            *cOptionCount = nOptions;
                            *cOptions = options;
                            return NOERROR;
                        }
                    }
                    else
                        // must be end of string
                        break;
                }
                *cOptionCount = nOptions;
                *cOptions = options;
                hr = NOERROR;
            }
            CoTaskMemFree(s);
        }
    }
    return hr;
}

HRESULT VLCControl::CreateTargetOptions(int codePage, VARIANT *options, char ***cOptions, int *cOptionCount)
{
    HRESULT hr = E_INVALIDARG;
    if( VT_ERROR == V_VT(options) )
    {
        if( DISP_E_PARAMNOTFOUND == V_ERROR(options) )
        {
            // optional parameter not set
            *cOptions = NULL;
            *cOptionCount = 0;
            return NOERROR;
        }
    }
    else if( (VT_EMPTY == V_VT(options)) || (VT_NULL == V_VT(options)) )
    {
        // null parameter
        *cOptions = NULL;
        *cOptionCount = 0;
        return NOERROR;
    }
    else if( VT_DISPATCH == V_VT(options) )
    {
        // if object is a collection, retrieve enumerator
        VARIANT colEnum;
        V_VT(&colEnum) = VT_UNKNOWN;
        hr = GetObjectProperty(V_DISPATCH(options), DISPID_NEWENUM, colEnum);
        if( SUCCEEDED(hr) )
        {
            IEnumVARIANT *enumVar;
            hr = V_UNKNOWN(&colEnum)->QueryInterface(IID_IEnumVARIANT, (LPVOID *)&enumVar);
            if( SUCCEEDED(hr) )
            {
                long pos = 0;
                long capacity = 16;
                VARIANT option;

                *cOptions = (char **)CoTaskMemAlloc(capacity*sizeof(char *));
                if( NULL != *cOptions )
                {
                    ZeroMemory(*cOptions, sizeof(char *)*capacity);
                    while( SUCCEEDED(hr) && (S_OK == enumVar->Next(1, &option, NULL)) )
                    {
                        if( VT_BSTR == V_VT(&option) )
                        {
                            char *cOption = CStrFromBSTR(codePage, V_BSTR(&option));
                            (*cOptions)[pos] = cOption;
                            if( NULL != cOption )
                            {
                                ++pos;
                                if( pos == capacity )
                                {
                                    char **moreOptions = (char **)CoTaskMemRealloc(*cOptions, (capacity+16)*sizeof(char *));
                                    if( NULL != moreOptions )
                                    {
                                        ZeroMemory(moreOptions+capacity, sizeof(char *)*16);
                                        capacity += 16;
                                        *cOptions = moreOptions;
                                    }
                                    else
                                        hr = E_OUTOFMEMORY;
                                }
                            }
                            else
                                hr = ( SysStringLen(V_BSTR(&option)) > 0 ) ?
                                    E_OUTOFMEMORY : E_INVALIDARG;
                        }
                        else
                            hr = E_INVALIDARG;

                        VariantClear(&option);
                    }
                    *cOptionCount = pos;
                    if( FAILED(hr) )
                    {
                        // free already processed elements
                        FreeTargetOptions(*cOptions, *cOptionCount);
                    }
                }
                else
                    hr = E_OUTOFMEMORY;

                enumVar->Release();
            }
        }