C++ PLT_DeviceDataReference::IsNull方法代码示例

static bool FindDeviceWait(CUPnP* upnp, const char* uuid, PLT_DeviceDataReference& device)
{
    bool client_started = upnp->IsClientStarted();
    upnp->StartClient();

    // look for device in our list
    // (and wait for it to respond for 5 secs if we're just starting upnp client)
    NPT_TimeStamp watchdog;
    NPT_System::GetCurrentTimeStamp(watchdog);
    watchdog += 5.f;

    for (;;) {
        if (NPT_SUCCEEDED(upnp->m_MediaBrowser->FindServer(uuid, device)) && !device.IsNull())
            break;

        // fail right away if device not found and upnp client was already running
        if (client_started)
            return false;

        // otherwise check if we've waited long enough without success
        NPT_TimeStamp now;
        NPT_System::GetCurrentTimeStamp(now);
        if (now > watchdog)
            return false;

        // sleep a bit and try again
        NPT_System::Sleep(NPT_TimeInterval((double)1));
    }

    return !device.IsNull();
}

/*----------------------------------------------------------------------
|   PLT_DeviceData::SetDescription
+---------------------------------------------------------------------*/
NPT_Result
PLT_DeviceData::SetDescription(PLT_DeviceDataReference&      root_device,
                               NPT_TimeInterval              leasetime,
                               NPT_HttpUrl                   description_url,
                               const char*                   description, 
                               const NPT_HttpRequestContext& context)
{
    NPT_XmlParser       parser;
    NPT_XmlNode*        tree = NULL;
    NPT_Result          res;
    NPT_XmlElementNode* root = NULL;
    NPT_String          URLBase;
    
    // create new device if none passed
    if (root_device.IsNull()) {
        root_device = new PLT_DeviceData(description_url, "", leasetime);
    }
    
    res = parser.Parse(description, tree);
    NPT_CHECK_LABEL_SEVERE(res, cleanup);

    root = tree->AsElementNode();
    if (!root || 
        root->GetTag() != "root" || 
        !root->GetNamespace() || 
        *root->GetNamespace() != "urn:schemas-upnp-org:device-1-0") {
        NPT_LOG_INFO_1("root namespace is invalid: %s", 
            (root&&root->GetNamespace())?root->GetNamespace()->GetChars():"null");
        NPT_CHECK_LABEL_SEVERE(NPT_FAILURE, cleanup);
    }

    // look for optional URLBase element
    if (NPT_SUCCEEDED(PLT_XmlHelper::GetChildText(root, "URLBase", URLBase))) {
        NPT_HttpUrl url(URLBase);
		// Some devices like Connect360 try to be funny - not so
        if (url.GetHost().ToLowercase() == "localhost" ||
            url.GetHost().ToLowercase() == "127.0.0.1") {
            url.SetHost(context.GetRemoteAddress().GetIpAddress().ToString());
        }
        root_device->SetURLBase(url);
    } else {
        // No URLBase, derive from description url
        root_device->SetURLBase(description_url);
    }

    // at least one root device child element is required
    NPT_XmlElementNode* device;
    if (!(device = PLT_XmlHelper::GetChild(root, "device"))) {
        NPT_CHECK_LABEL_SEVERE(NPT_FAILURE, cleanup);
    }

    res = SetDescriptionDevice(root_device, device, context);

cleanup:
    // delete the tree
    delete tree;
    return res;
}

/*----------------------------------------------------------------------
|   PLT_MicroMediaController::HandleCmd_unmute
+---------------------------------------------------------------------*/
void
PLT_MicroMediaController::HandleCmd_unmute()
{
    PLT_DeviceDataReference device;
    GetCurMediaRenderer(device);
    if (!device.IsNull()) {
        SetMute(device, 0, "Master", false, NULL);
    }
}

/*----------------------------------------------------------------------
|   PLT_MicroMediaController::DoBrowse
+---------------------------------------------------------------------*/
NPT_Result
PLT_MicroMediaController::DoBrowse(const char* object_id, /* = NULL */
                                   bool        metadata  /* = false */)
{
    NPT_Result res = NPT_FAILURE;
    PLT_DeviceDataReference device;
    GetCurMediaServer(device);
    if (!device.IsNull()) {
        NPT_String cur_object_id;
        m_CurBrowseDirectoryStack.Peek(cur_object_id);

        // send off the browse packet and block
        res = BrowseSync(
            device,
            object_id?object_id:(const char*)cur_object_id,
            m_MostRecentBrowseResults,
            metadata);
    }

    return res;
}

static std::string LookupUPnPHost(const std::string& uuid)
{
#ifdef HAS_UPNP
  UPNP::CUPnP* upnp = UPNP::CUPnP::GetInstance();

  if (!upnp->IsClientStarted())
  {
    upnp->StartClient();

    upnpInitReady = CDateTime::GetCurrentDateTime() + CDateTimeSpan(0, 0, 0, 10);
  }

  PLT_SyncMediaBrowser* browser = upnp->m_MediaBrowser;

  PLT_DeviceDataReference device;

  if (browser && NPT_SUCCEEDED(browser->FindServer(uuid.c_str(), device)) && !device.IsNull())
    return (const char*)device->GetURLBase().GetHost();
#endif

  return "";
}

/*----------------------------------------------------------------------
|   CUPnPDirectory::GetDirectory
+---------------------------------------------------------------------*/
bool
CUPnPDirectory::GetDirectory(const CStdString& strPath, CFileItemList &items)
{
    CUPnP* upnp = CUPnP::GetInstance();

    /* upnp should never be cached, it has internal cache */
    items.SetCacheToDisc(CFileItemList::CACHE_NEVER);

    // start client if it hasn't been done yet
    bool client_started = upnp->IsClientStarted();
    upnp->StartClient();

    // We accept upnp://devuuid/[item_id/]
    NPT_String path = strPath.c_str();
    if (!path.StartsWith("upnp://", true)) {
        return false;
    }

    if (path.Compare("upnp://", true) == 0) {
        // root -> get list of devices
        const NPT_Lock<PLT_DeviceDataReferenceList>& devices = upnp->m_MediaBrowser->GetMediaServers();
        NPT_List<PLT_DeviceDataReference>::Iterator device = devices.GetFirstItem();
        while (device) {
            NPT_String name = (*device)->GetFriendlyName();
            NPT_String uuid = (*device)->GetUUID();

            CFileItemPtr pItem(new CFileItem((const char*)name));
            pItem->m_strPath = (const char*) "upnp://" + uuid + "/";
            pItem->m_bIsFolder = true;
            pItem->SetThumbnailImage((const char*)(*device)->GetIconUrl("image/jpeg"));

            items.Add(pItem);

            ++device;
        }
    } else {
        if (!path.EndsWith("/")) path += "/";

        // look for nextslash
        int next_slash = path.Find('/', 7);

        NPT_String uuid = (next_slash==-1)?path.SubString(7):path.SubString(7, next_slash-7);
        NPT_String object_id = (next_slash==-1)?"":path.SubString(next_slash+1);
        object_id.TrimRight("/");
        if (object_id.GetLength()) {
            CStdString tmp = (char*) object_id;
            CUtil::URLDecode(tmp);
            object_id = tmp;
        }

        // look for device in our list
        // (and wait for it to respond for 5 secs if we're just starting upnp client)
        NPT_TimeStamp watchdog;
        NPT_System::GetCurrentTimeStamp(watchdog);
        watchdog += 5.f;

        PLT_DeviceDataReference device;
        for (;;) {
            if (NPT_SUCCEEDED(upnp->m_MediaBrowser->FindServer(uuid, device)) && !device.IsNull())
                break;

            // fail right away if device not found and upnp client was already running
            if (client_started)
                goto failure;

            // otherwise check if we've waited long enough without success
            NPT_TimeStamp now;
            NPT_System::GetCurrentTimeStamp(now);
            if (now > watchdog)
                goto failure;

            // sleep a bit and try again
            NPT_System::Sleep(NPT_TimeInterval(1, 0));
        }

        // issue a browse request with object_id
        // if object_id is empty use "0" for root
        object_id = object_id.IsEmpty()?"0":object_id;

        // just a guess as to what types of files we want
        bool video = true;
        bool audio = true;
        bool image = true;
        m_strFileMask.TrimLeft("/");
        if (!m_strFileMask.IsEmpty()) {
            video = m_strFileMask.Find(".wmv") >= 0;
            audio = m_strFileMask.Find(".wma") >= 0;
            image = m_strFileMask.Find(".jpg") >= 0;
        }

        // special case for Windows Media Connect and WMP11 when looking for root
        // We can target which root subfolder we want based on directory mask
        if (object_id == "0" && ((device->GetFriendlyName().Find("Windows Media Connect", 0, true) >= 0) ||
                                 (device->m_ModelName == "Windows Media Player Sharing"))) {

            // look for a specific type to differentiate which folder we want
            if (audio && !video && !image) {
//.........这里部分代码省略.........

/*----------------------------------------------------------------------
|   CUPnPDirectory::GetFriendlyName
+---------------------------------------------------------------------*/
const char*
CUPnPDirectory::GetFriendlyName(const char* url)
{
    NPT_String path = url;
    if (!path.EndsWith("/")) path += "/";

    if (path.Left(7).Compare("upnp://", true) != 0) {
        return NULL;
    } else if (path.Compare("upnp://", true) == 0) {
        return "UPnP Media Servers (Auto-Discover)";
    }

    // look for nextslash
    int next_slash = path.Find('/', 7);
    if (next_slash == -1)
        return NULL;

    NPT_String uuid = path.SubString(7, next_slash-7);
    NPT_String object_id = path.SubString(next_slash+1, path.GetLength()-next_slash-2);

    if (!CUPnP::GetInstance()->IsClientStarted())
        return NULL;

    // look for device
    PLT_DeviceDataReference device;
    if (NPT_FAILED(CUPnP::GetInstance()->m_MediaBrowser->FindServer(uuid, device)) || device.IsNull())
        return NULL;

    return (const char*)device->GetFriendlyName();
}