public async Task OnTimeUpdateEventHandler(double value)
{
PlayerState.CurrentTime = TimeSpan.FromSeconds(value);
await OnTimeUpdated.InvokeAsync(PlayerState);
StateHasChanged();
}
/// <summary>
/// Processes a 4A "Clock-time and date" frame 0b01000
/// </summary>
private void ProcessFramePayload_ClockTime(RDSFrame frame)
{
//Read julian day code
uint dayCode = (uint)((frame.c >> 1) & 0b0111111111111111);
dayCode |= (uint)(((frame.b >> (HEADER_OFFSET - 4)) & 0b0000000000000011) << 15);
//Decode day code according to Annex G of the linked document
//This is in UTC
int year = (int)((dayCode - 15078.2f) / 365.25f);
int month = (int)((dayCode - 14956.1f - (int)(year * 365.25f)) / 30.6001f);
int day = (int)dayCode - 14956 - ((int)(year * 365.25f)) - ((int)(month * 30.6001f));
int k;
if (month == 14 || month == 15)
{
k = 1;
}
else
{
k = 0;
}
year += 1900 + k;
month -= 1 - (k * 12);
//Get the hour
int localHour = ((frame.d >> 12) & 0b0000000000001111);
localHour |= ((frame.c & 0b0000000000000001) << 4);
//Get the minute
int localMinute = ((frame.d >> 6) & 0b0000000000111111);
//Get the local time offset, in half hours. Also calculate the sign
int localOffsetParts = (frame.d & 0b0000000000011111);
if ((frame.d & 0b0000000000100000) != 0)
{
localOffsetParts = -localOffsetParts;
}
DateTime time;
TimeSpan localOffset;
DateTime localTime;
try
{
//Create a UTC DateTime from the UTC portion
time = new DateTime(year, month, day, 0, 0, 0, 0, DateTimeKind.Local);
//Convert the local hour and minute to a TimeSpan we'll save
localOffset = new TimeSpan(0, 30 * localOffsetParts, 0);
//Convert to local time
localTime = time.AddMinutes((localHour * 60) + (localOffsetParts * 30) + localMinute);
} catch
{
//Ignore. If this was a corrupted RDS frame, this would've thrown an exception
return;
}
//Set
this.timeLast = localTime;
this.timeOffset = localOffset;
this.timeComplete = true;
//Send event
OnTimeUpdated?.Invoke(this, localTime, localOffset);
}