upnp_tv_device.c

来自「基于LINUX/UNIX的UPN库,是智能家具的用的底层库.」· C语言 代码 · 共 2,039 行 · 第 1/5 页

                          OUT IXML_Document ** out,
                          OUT char **errorString )
{

    return IncrementContrast( 1, in, out, errorString );
}

/******************************************************************************
 * TvDeviceDecreaseContrast
 *
 * Description: 
 *      Decrease the contrast.
 *
 * Parameters:
 *          
 *    IXML_Document * in -  action request document
 *    IXML_Document **out - action result document
 *    char **errorString - errorString (in case action was unsuccessful)
 *
 *****************************************************************************/
int
TvDeviceDecreaseContrast( IXML_Document * in,
                          IXML_Document ** out,
                          char **errorString )
{
    return IncrementContrast( -1, in, out, errorString );
}

/******************************************************************************
 * TvDeviceSetBrightness
 *
 * Description: 
 *       Change the brightness, update the TvDevice picture service
 *       state table, and notify all subscribed control points of the
 *       updated state.
 *
 * Parameters:
 *   brightness -- The brightness value to change to.
 *
 *****************************************************************************/
int
TvDeviceSetBrightness( IN IXML_Document * in,
                       OUT IXML_Document ** out,
                       OUT char **errorString )
{

    char *value = NULL;
    int brightness = -1;

    ( *out ) = NULL;
    ( *errorString ) = NULL;

    if( !( value = SampleUtil_GetFirstDocumentItem( in, "Brightness" ) ) ) {
        ( *errorString ) = "Invalid Brightness";
        return UPNP_E_INVALID_PARAM;
    }

    brightness = atoi( value );

    if( brightness < MIN_BRIGHTNESS || brightness > MAX_BRIGHTNESS ) {
        SampleUtil_Print( "error: can't change to brightness %d\n",
                          brightness );
        ( *errorString ) = "Invalid Brightness";
        return UPNP_E_INVALID_PARAM;
    }

    /*
       Vendor-specific code to set the volume goes here 
     */

    if( TvDeviceSetServiceTableVar( TV_SERVICE_PICTURE,
                                    TV_PICTURE_BRIGHTNESS, value ) ) {
        if( UpnpAddToActionResponse( out, "SetBrightness",
                                     TvServiceType[TV_SERVICE_PICTURE],
                                     "NewBrightness",
                                     value ) != UPNP_E_SUCCESS ) {
            ( *out ) = NULL;
            ( *errorString ) = "Internal Error";
            free( value );
            return UPNP_E_INTERNAL_ERROR;
        }
        free( value );
        return UPNP_E_SUCCESS;
    } else {
        free( value );
        ( *errorString ) = "Internal Error";
        return UPNP_E_INTERNAL_ERROR;
    }

}

/******************************************************************************
 * IncrementBrightness
 *
 * Description: 
 *       Increment the brightness.  Read the current brightness from the state
 *       table, add the increment, and then change the brightness.
 *
 * Parameters:
 *   incr -- The increment by which to change the brightness.
 *   
 *    IXML_Document * in -  action request document
 *    IXML_Document **out - action result document
 *    char **errorString - errorString (in case action was unsuccessful)
 *****************************************************************************/
int
IncrementBrightness( IN int incr,
                     IN IXML_Document * in,
                     OUT IXML_Document ** out,
                     OUT char **errorString )
{
    int curbrightness,
      newbrightness;
    char *actionName = NULL;
    char value[TV_MAX_VAL_LEN];

    if( incr > 0 ) {
        actionName = "IncreaseBrightness";
    } else {
        actionName = "DecreaseBrightness";
    }

    ithread_mutex_lock( &TVDevMutex );
    curbrightness = atoi( tv_service_table[TV_SERVICE_PICTURE].
                          VariableStrVal[TV_PICTURE_BRIGHTNESS] );
    ithread_mutex_unlock( &TVDevMutex );

    newbrightness = curbrightness + incr;

    if( newbrightness < MIN_BRIGHTNESS || newbrightness > MAX_BRIGHTNESS ) {
        SampleUtil_Print( "error: can't change to brightness %d\n",
                          newbrightness );
        ( *errorString ) = "Invalid Brightness";
        return UPNP_E_INVALID_PARAM;
    }

    /*
       Vendor-specific code to set the channel goes here 
     */

    sprintf( value, "%d", newbrightness );

    if( TvDeviceSetServiceTableVar( TV_SERVICE_PICTURE,
                                    TV_PICTURE_BRIGHTNESS, value ) ) {
        if( UpnpAddToActionResponse( out, actionName,
                                     TvServiceType[TV_SERVICE_PICTURE],
                                     "Brightness",
                                     value ) != UPNP_E_SUCCESS ) {
            ( *out ) = NULL;
            ( *errorString ) = "Internal Error";
            return UPNP_E_INTERNAL_ERROR;
        }
        return UPNP_E_SUCCESS;
    } else {
        ( *errorString ) = "Internal Error";
        return UPNP_E_INTERNAL_ERROR;
    }
}

/******************************************************************************
 * TvDeviceIncreaseBrightness
 *
 * Description: 
 *       Increase brightness.
 *
 * Parameters:
 *
 *    IXML_Document * in -  action request document
 *    IXML_Document **out - action result document
 *    char **errorString - errorString (in case action was unsuccessful)
 *
 *****************************************************************************/
int
TvDeviceIncreaseBrightness( IN IXML_Document * in,
                            OUT IXML_Document ** out,
                            OUT char **errorString )
{
    return IncrementBrightness( 1, in, out, errorString );
}

/******************************************************************************
 * TvDeviceDecreaseBrightness
 *
 * Description: 
 *       Decrease brightnesss.
 *
 * Parameters:
 *    IXML_Document * in -  action request document
 *    IXML_Document **out - action result document
 *    char **errorString - errorString (in case action was unsuccessful)
 *
 *****************************************************************************/
int
TvDeviceDecreaseBrightness( IN IXML_Document * in,
                            OUT IXML_Document ** out,
                            OUT char **errorString )
{
    return IncrementBrightness( -1, in, out, errorString );
}

/******************************************************************************
 * TvDeviceCallbackEventHandler
 *
 * Description: 
 *       The callback handler registered with the SDK while registering
 *       root device.  Dispatches the request to the appropriate procedure
 *       based on the value of EventType. The four requests handled by the 
 *       device are: 
 *                   1) Event Subscription requests.  
 *                   2) Get Variable requests. 
 *                   3) Action requests.
 *
 * Parameters:
 *
 *   EventType -- The type of callback event
 *   Event -- Data structure containing event data
 *   Cookie -- Optional data specified during callback registration
 *
 *****************************************************************************/
int
TvDeviceCallbackEventHandler( Upnp_EventType EventType,
                              void *Event,
                              void *Cookie )
{

    switch ( EventType ) {

        case UPNP_EVENT_SUBSCRIPTION_REQUEST:

            TvDeviceHandleSubscriptionRequest( ( struct
                                                 Upnp_Subscription_Request
                                                 * )Event );
            break;

        case UPNP_CONTROL_GET_VAR_REQUEST:
            TvDeviceHandleGetVarRequest( ( struct Upnp_State_Var_Request
                                           * )Event );
            break;

        case UPNP_CONTROL_ACTION_REQUEST:
            TvDeviceHandleActionRequest( ( struct Upnp_Action_Request * )
                                         Event );
            break;

            /*
               ignore these cases, since this is not a control point 
             */
        case UPNP_DISCOVERY_ADVERTISEMENT_ALIVE:
        case UPNP_DISCOVERY_SEARCH_RESULT:
        case UPNP_DISCOVERY_SEARCH_TIMEOUT:
        case UPNP_DISCOVERY_ADVERTISEMENT_BYEBYE:
        case UPNP_CONTROL_ACTION_COMPLETE:
        case UPNP_CONTROL_GET_VAR_COMPLETE:
        case UPNP_EVENT_RECEIVED:
        case UPNP_EVENT_RENEWAL_COMPLETE:
        case UPNP_EVENT_SUBSCRIBE_COMPLETE:
        case UPNP_EVENT_UNSUBSCRIBE_COMPLETE:
            break;

        default:
            SampleUtil_Print
                ( "Error in TvDeviceCallbackEventHandler: unknown event type %d\n",
                  EventType );
    }

    /*
       Print a summary of the event received 
     */
    SampleUtil_PrintEvent( EventType, Event );

    return ( 0 );
}

/******************************************************************************
 * TvDeviceStop
 *
 * Description: 
 *       Stops the device. Uninitializes the sdk. 
 *
 * Parameters:
 *
 *****************************************************************************/
int
TvDeviceStop()
{
    UpnpUnRegisterRootDevice( device_handle );
    UpnpFinish();
    SampleUtil_Finish();
    ithread_mutex_destroy( &TVDevMutex );
    return UPNP_E_SUCCESS;
}

/******************************************************************************
 * TvDeviceStart
 *
 * Description: 
 *      Initializes the UPnP Sdk, registers the device, and sends out 
 *      advertisements.  
 *
 * Parameters:
 *
 *   ip_address - ip address to initialize the sdk (may be NULL)
 *                if null, then the first non null loopback address is used.
 *   port       - port number to initialize the sdk (may be 0)
 *                if zero, then a random number is used.
 *   desc_doc_name - name of description document.
 *                   may be NULL. Default is tvcombodesc.xml
 *   web_dir_path  - path of web directory.
 *                   may be NULL. Default is ./web (for Linux) or ../tvdevice/web
 *                   for windows.
 *   pfun          - print function to use.  
 *
 *****************************************************************************/
int
TvDeviceStart( char *ip_address,
               unsigned short port,
               char *desc_doc_name,
               char *web_dir_path,
               print_string pfun )
{
    int ret = UPNP_E_SUCCESS;

    char desc_doc_url[DESC_URL_SIZE];

    ithread_mutex_init( &TVDevMutex, NULL );

    SampleUtil_Initialize( pfun );

    SampleUtil_Print(
        "Initializing UPnP Sdk with\n"
        "\tipaddress = %s port = %u\n",
        ip_address, port );

    if( ( ret = UpnpInit( ip_address, port ) ) != UPNP_E_SUCCESS ) {
        SampleUtil_Print( "Error with UpnpInit -- %d\n", ret );
        UpnpFinish();
        return ret;
    }

    if( ip_address == NULL ) {
        ip_address = UpnpGetServerIpAddress();
    }

    if( port == 0 ) {
        port = UpnpGetServerPort();
    }

    SampleUtil_Print(
        "UPnP Initialized\n"
	"\tipaddress= %s port = %u\n",
        ip_address, port );

    if( desc_doc_name == NULL ) {
        desc_doc_name = "tvcombodesc.xml";
    }

    if( web_dir_path == NULL ) {
        web_dir_path = DEFAULT_WEB_DIR;
    }

    snprintf( desc_doc_url, DESC_URL_SIZE, "http://%s:%d/%s", ip_address,
              port, desc_doc_name );

    SampleUtil_Print( "Specifying the webserver root directory -- %s\n",
                      web_dir_path );
    if( ( ret =
          UpnpSetWebServerRootDir( web_dir_path ) ) != UPNP_E_SUCCESS ) {
        SampleUtil_Print
            ( "Error specifying webserver root directory -- %s: %d\n",
              web_dir_path, ret );
        UpnpFinish();
        return ret;
    }

    SampleUtil_Print(
        "Registering the RootDevice\n"
        "\t with desc_doc_url: %s\n",
        desc_doc_url );

    if( ( ret = UpnpRegisterRootDevice( desc_doc_url,
                                        TvDeviceCallbackEventHandler,
                                        &device_handle, &device_handle ) )
        != UPNP_E_SUCCESS ) {
        SampleUtil_Print( "Error registering the rootdevice : %d\n", ret );
        UpnpFinish();
        return ret;
    } else {
        SampleUtil_Print(
            "RootDevice Registered\n"
            "Initializing State Table\n");
        TvDeviceStateTableInit( desc_doc_url );
        SampleUtil_Print("State Table Initialized\n");

        if( ( ret =
              UpnpSendAdvertisement( device_handle, default_advr_expire ) )
            != UPNP_E_SUCCESS ) {
            SampleUtil_Print( "Error sending advertisements : %d\n", ret );
            UpnpFinish();
            return ret;
        }

        SampleUtil_Print("Advertisements Sent\n");
    }
    return UPNP_E_SUCCESS;
}