/// <summary>
/// Builds a image header.
/// </summary>
/// <param name="profile">A <see cref="DeviceProfile"/>.</param>
/// <param name="container">The container.</param>
/// <param name="width">Optional width.</param>
/// <param name="height">Optional height.</param>
/// <param name="isDirectStream">True if the image is via direct stream.</param>
/// <param name="orgPn">Optional organisation.</param>
/// <returns>A string representation.</returns>
public static string BuildImageHeader(
DeviceProfile profile,
string container,
int?width,
int?height,
bool isDirectStream,
string?orgPn = null)
{
if (profile == null)
{
throw new ArgumentNullException(nameof(profile));
}
string orgOp = ";DLNA.ORG_OP=" + DlnaMaps.GetImageOrgOpValue();
// 0 = native, 1 = transcoded
var orgCi = isDirectStream ? ";DLNA.ORG_CI=0" : ";DLNA.ORG_CI=1";
const DlnaFlags FlagValue = DlnaFlags.BackgroundTransferMode |
DlnaFlags.InteractiveTransferMode |
DlnaFlags.DlnaV15;
string dlnaflags = string.Format(
CultureInfo.InvariantCulture,
";DLNA.ORG_FLAGS={0}",
DlnaMaps.FlagsToString(FlagValue));
if (string.IsNullOrEmpty(orgPn))
{
var mediaProfile = profile.GetImageMediaProfile(
container,
width,
height);
orgPn = mediaProfile?.OrgPn;
if (string.IsNullOrEmpty(orgPn))
{
orgPn = GetImageOrgPnValue(container, width, height);
}
}
if (string.IsNullOrEmpty(orgPn))
{
return(orgOp.TrimStart(';') + orgCi + dlnaflags);
}
return("DLNA.ORG_PN=" + orgPn + orgOp + orgCi + dlnaflags);
}
