public void PlayPrepare(string fileName)
{
try
{
var filePath = _Storage.GetPath(fileName);
var url = NSUrl.FromFilename(filePath);
if (_Player == null)
{
_Player = new AVPlayer();
}
if (_PlayerItem != null)
{
_Player.RemoveTimeObserver(_TimeChanged); // for skipping 1-2 extra triggering for new item creation code below
CleanPlayerItem();
}
PlayerReady = false;
_Asset = AVAsset.FromUrl(url);
_PlayerItem = new AVPlayerItem(_Asset);
_PlayerItem.AddObserver(this, _status, NSKeyValueObservingOptions.Initial | NSKeyValueObservingOptions.New, _Player.Handle);
_PlayerItem.AddObserver(this, _error, NSKeyValueObservingOptions.Initial | NSKeyValueObservingOptions.New, _Player.Handle);
_Player.ReplaceCurrentItemWithPlayerItem(_PlayerItem);
_Player.Rate = 1;
_Player.Pause(); // HACK: stop autoplaying after recording
_TimeChanged = _Player.AddPeriodicTimeObserver(new CMTime(1, 1), DispatchQueue.MainQueue, time => {
// skip restart event
if (_isRestart)
{
_isRestart = false;
return;
}
if (_PlayerItem != null && _PlayerItem.Duration != CMTime.Indefinite)
{
var stopped = time == _PlayerItem.Duration;
PlaybackStatus?.Invoke(this, new PlaybackEventArgs {
CurrentTime = time.Seconds,
Duration = _PlayerItem.Duration.Seconds,
Stopped = stopped
});
if (stopped)
{
_isRestart = true;
_Player.Seek(CMTime.Zero);
}
}
});
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(string.Format("*** AudioService.PlayPrepare - Exception: {0}", ex));
}
}
private void PlaybackMediaEnded(MediaPlayer sender, object args)
{
_playbackTimer.Stop();
PlaybackStatus?.Invoke(this, new PlaybackEventArgs {
Stopped = true,
CurrentTime = sender.PlaybackSession.NaturalDuration.TotalSeconds,
Duration = sender.PlaybackSession.NaturalDuration.TotalSeconds
});
}
private void PlaybackMediaOpened(MediaPlayer sender, object args)
{
PlayerReady = true;
PlaybackStatus?.Invoke(this, new PlaybackEventArgs {
Stopped = true,
CurrentTime = 0,
Duration = sender.PlaybackSession.NaturalDuration.TotalSeconds,
IsNew = true
});
PlayerStatus?.Invoke(this, new EventArgs());
}
private void PlaybackMediaFailed(MediaPlayer sender, MediaPlayerFailedEventArgs args)
{
_playbackTimer.Stop();
PlayerReady = false;
PlaybackStatus?.Invoke(this, new PlaybackEventArgs {
Stopped = true,
Duration = 0,
CurrentTime = 0,
HasError = true
});
}
private void PlaybackStateChanged(MediaPlayer sender, object args)
{
if (!PlayerReady)
{
return;
}
PlaybackStatus.Invoke(this, new PlaybackEventArgs {
Stopped = sender.PlaybackSession.PlaybackState != MediaPlaybackState.Playing && sender.PlaybackSession.PlaybackState != MediaPlaybackState.Paused,
CurrentTime = sender.PlaybackSession.Position.TotalSeconds,
Duration = sender.PlaybackSession.NaturalDuration.TotalSeconds
});
}
public override void ObserveValue(NSString keyPath, NSObject ofObject, NSDictionary change, IntPtr context)
{
var path = keyPath.ToString();
System.Diagnostics.Debug.WriteLine(string.Format("*** AudioService.ObserveValue - Value change: {0} = {1}", keyPath, change.ToString()));
if (path.Equals(_status))
{
if (_Player.Status == AVPlayerStatus.ReadyToPlay)
{
if (!PlayerReady)
{
PlayerReady = _PlayerItem.Duration != CMTime.Indefinite;
if (PlayerReady)
{
PlaybackStatus?.Invoke(this, new PlaybackEventArgs {
CurrentTime = 0,
Duration = _PlayerItem.Duration.Seconds,
Stopped = true,
IsNew = true
});
PlayerStatus?.Invoke(this, new EventArgs());
}
}
}
}
else if (path.Equals(_error))
{
if (_Player.Error != null)
{
PlayerReady = false;
PlaybackStatus?.Invoke(this, new PlaybackEventArgs {
CurrentTime = 0, Duration = 0, Stopped = true, HasError = true
});
PlayerStatus?.Invoke(this, new EventArgs());
}
}
}
protected virtual void OnPlaybackStatus(PlaybackEngine.PlaybackStatusEventArgs e) => PlaybackStatus?.Invoke(this, e);