Extract XMP from JPG or TIF Image File

Extracts the XMP metadata from a JPG or TIF image file.

void XmpExtract(void)
    {
    // Load a JPG with embedded XMP metadata and extract to a .xml file.
    // Also works with TIF image files.
    CkXmp xmp;
    xmp.UnlockComponent("anything for 30-day trial");

    bool success = xmp.LoadAppFile("ChilkatXmpDude1.jpg");
    if (!success)
	{
	xmp.SaveLastError("lastError.txt");
	return;
	}

    int numXmp = xmp.get_NumEmbedded();
    printf("Number of embedded XMP documents = %d\n",numXmp);

    // Get the 1st XMP metadata document contained within the JPG.
    // (It is unusual to have more than a single XMP embedded in a JPG or TIFF)
    CkXml *xml = xmp.GetEmbedded(0);
    if (!xml)
	{
	printf("XMP not found!\n");
	return;
	}

    xml->SaveXml("embeddedXmp.xml");

	delete xml;
	
    return;
    }