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Player.uno
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Player.uno
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using Uno;
using Uno.UX;
using Uno.Graphics;
using Uno.Math;
using Uno.Vector;
using Fuse;
using Fuse.Triggers;
using Fuse.Elements;
using Fuse.Controls;
using Fuse.Controls.Graphics;
using Fuse.Internal;
using Fuse.Nodes;
namespace GStreamer.Controls
{
public class Player : Panel
{
static readonly Selector StatusSelector = "Status";
static readonly Selector IsPlayingSelector = "IsPlaying";
static readonly Selector UriSelector = "Uri";
readonly Visual _visual = new Visual();
string _status;
public string Status
{
get { return _status; }
private set
{
if (_status == value)
return;
_status = value;
OnPropertyChanged(StatusSelector, this);
}
}
bool _isPlaying;
public bool IsPlaying
{
get { return _isPlaying; }
private set
{
if (_isPlaying == value)
return;
_isPlaying = value;
OnPropertyChanged(IsPlayingSelector, this);
}
}
string _uri;
public string Uri
{
get { return _uri; }
set
{
if (_uri == value)
return;
PlayUri(value);
}
}
public void PlayUri(string value)
{
_uri = value;
OnPropertyChanged(UriSelector, this);
}
public void Stop()
{
_visual.Clear("Stopped.");
}
protected override void OnRooted()
{
base.OnRooted();
Children.Add(_visual);
}
protected override void OnUnrooted()
{
RemoveAllChildren<Visual>();
base.OnUnrooted();
}
class Visual : ControlVisual<Player>, IVideoCallbacks
{
readonly SizingContainer _sizing = new SizingContainer();
IVideoPipeline _pipeline;
BusyTask _busyTask;
float2 _drawPosition;
float2 _drawSize;
float4 _uvClip;
protected override void Attach()
{
Control.AddPropertyListener(this);
PlayUri(Control.Uri);
}
protected override void Detach()
{
Control.RemovePropertyListener(this);
Clear();
}
public override void OnPropertyChanged(PropertyObject obj, Selector property)
{
if (property == UriSelector)
PlayUri(Control.Uri);
}
internal void PlayUri(string uri)
{
if (string.IsNullOrEmpty(uri))
{
Clear("No video stream.");
return;
}
OnLoading();
try
{
if defined(CPLUSPLUS)
{
_pipeline = new UriPipeline(this, uri);
UpdateManager.AddAction(Update);
}
else
{
throw new NotSupportedException("GStreamer is not available on this platform.");
}
}
catch (Exception e)
{
OnError(e);
}
}
internal void Clear(string status = null)
{
Control.Status = status;
Control.IsPlaying = false;
if (_pipeline == null)
return;
UpdateManager.RemoveAction(Update);
_pipeline.Dispose();
_pipeline = null;
InvalidateVisual();
}
void Update()
{
try
{
_pipeline.Update();
}
catch (Exception e)
{
OnError(e);
}
}
void OnError(Exception e)
{
Clear("Error: " + e.Message);
BusyTask.SetBusy(Control, ref _busyTask, BusyTaskActivity.Failed, e.Message);
Fuse.Diagnostics.UnknownException("Player", e, this);
}
void OnLoading()
{
Clear("Waiting for video to load...");
BusyTask.SetBusy(Control, ref _busyTask, BusyTaskActivity.Loading);
}
void IVideoCallbacks.OnReady()
{
if defined(!MOBILE)
Application.Current.Window.ClientSize = _pipeline.Size;
BusyTask.SetBusy(Control, ref _busyTask, BusyTaskActivity.None);
Control.Status = null;
Control.IsPlaying = true;
InvalidateLayout();
}
void IVideoCallbacks.OnFrameAvailable()
{
InvalidateVisual();
}
protected sealed override float2 OnArrangeMarginBox(float2 position, LayoutParams lp)
{
var size = base.OnArrangeMarginBox(position, lp);
if (_pipeline == null)
return size;
var videoSize = (float2) _pipeline.Size;
// Avoid division by zero
if (videoSize.X < 1 || size.X < 1 ||
videoSize.Y < 1 || size.Y < 1)
return size;
var videoAspect = videoSize.X / videoSize.Y;
var visualAspect = size.X / size.Y;
// Fill entire visual with video (rather than fit-to-box)
if (videoAspect > visualAspect)
{
_drawSize.X = videoSize.X * (size.Y / videoSize.Y);
_drawSize.Y = size.Y;
_drawPosition.X = (size.X - _drawSize.X) * .5f;
_drawPosition.Y = 0;
}
else
{
_drawSize.X = size.X;
_drawSize.Y = videoSize.Y * (size.X / videoSize.X);
_drawPosition.X = 0;
_drawPosition.Y = (size.Y - _drawSize.Y) * .5f;
}
// Clip to avoid drawing outside of the visual
_uvClip = _sizing.CalcClip(size, ref _drawPosition, ref _drawSize);
return size;
}
public sealed override void Draw(DrawContext dc)
{
if (_pipeline == null)
return;
var texture = _pipeline.Texture;
if (texture == null)
return;
DrawHelper.Instance.DrawClipped(dc, this, _drawPosition, _drawSize, texture, _uvClip);
}
}
}
}