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Graph.cs
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Graph.cs
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using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Windows.Forms;
using DirectShowLib;
using System.Runtime.InteropServices;
using System.IO;
namespace gep
{
class Graph : IDisposable
{
List<Filter> filters = new List<Filter>();
DynArray2<int> field = new DynArray2<int>(); //density for each cell
public DynArray2<int> ownersmap = new DynArray2<int>(); //for connections
List<PinConnection> connections = new List<PinConnection>();
List<Filter> selectedFilters = new List<Filter>();
PinConnection selectedConnection;
IGraphBuilder graphBuilder;
DsROTEntry rot_entry;
GraphForm myform;
IMediaControl mediaControl;
IMediaSeeking mediaSeeking;
IMediaEvent mediaEvent;
int cellSize = 16;
History history = new History();
Dictionary<string, Point> filter_positions = new Dictionary<string, Point>(); //uniq name => pos
public int cellsize
{
get { return cellSize; }
set {
cellSize = value;
foreach (Filter f in filters)
{
f.RepositionPins();
f.Coords = f.Coords;//recalc rect
}
Filter.namefont = new Font("Arial", cellSize / 2);
Pin.pinfont = new Font("Arial", cellSize / 2);
}
}
public GraphForm Form { get { return myform; } }
bool isFromRot;
bool disconnecting = false; //we're just disconnecting from ROT
public bool IsFromRot { get { return isFromRot; } }
public Graph(GraphForm gf)
{
myform = gf;
isFromRot = false;
graphBuilder = (IGraphBuilder)new FilterGraph();
rot_entry = new DsROTEntry(graphBuilder);
mediaControl = (IMediaControl)graphBuilder;
mediaSeeking = (IMediaSeeking)graphBuilder;
mediaEvent = (IMediaEvent)graphBuilder;
}
public Graph(GraphForm gf, IGraphBuilder gb) //for remote graphs
{
myform = gf;
graphBuilder = gb;
isFromRot = true;
mediaControl = (IMediaControl)graphBuilder;
mediaSeeking = (IMediaSeeking)graphBuilder;
mediaEvent = (IMediaEvent)graphBuilder;
ReloadGraph();
}
public void ReloadGraph()
{
ReloadFilters();
LayoutFiltersAndPaths();
}
public void LayoutFiltersAndPaths()
{
log("layout filters and paths..");
LayoutFilters();
if (!Program.mainform.autoArrange)
LayoutFiltersManual();
RecalcPaths();
log("layout filters: done");
}
public List<Filter> SelectedFilters
{
get { return selectedFilters; }
//set { selectedFilter = value; }
}
public void SelectFilter(Filter f, bool select)
{
if (select)
{
if (!selectedFilters.Contains(f))
selectedFilters.Add(f);
selectedConnection = null;
} else
selectedFilters.Remove(f);
}
public void ClearFiltersSelection()
{
selectedFilters.Clear();
selectedConnection = null;
}
public PinConnection SelectedConnection
{
get { return selectedConnection; }
set { selectedConnection = value; }
}
public void Draw(Graphics g, Point viewpoint)
{
foreach (Filter f in filters)
f.Draw(g, viewpoint);
foreach (PinConnection con in connections)
if (con != selectedConnection)
con.Draw(g, false, viewpoint);
if (selectedConnection != null)
selectedConnection.Draw(g, true, viewpoint);
}
public void AddFilter(FilterProps fp, Point? desired_pos) //create new IBaseFilter, add it to DS graph and this graph
{
Filter f;
try
{
f = new Filter(fp);
int hr = graphBuilder.AddFilter(f.BaseFilter, fp.Name);
DsError.ThrowExceptionForHR(hr);
}
catch (COMException e)
{
ShowCOMException(e, "Error creating filter " + fp.Name);
return;
}
catch (Exception e)
{
MessageBox.Show(e.Message, "Error adding filter");
return;
}
string srcfn = null, dstfn = null;
if ((f.BaseFilter as IFileSourceFilter) != null)
srcfn = f.ChooseSrcFileName();
if ((f.BaseFilter as IFileSinkFilter) != null)
dstfn = f.ChooseDstFileName();
AddFilterHere(f, true, desired_pos);
history.AddFilter(fp, f.Name, srcfn, dstfn, f);
}
void AddFilterHere(Filter f, bool recalcPaths, Point? desired_pos)
{
f.JoinGraph(this, false);
if (desired_pos == null)
f.Coords = FindPlaceForFilter(f);
else
{
f.Coords = desired_pos.Value;
f.Coords = FindNearPlaceForFilter(f, f.Coords);
}
filters.Add(f);
PlaceFilter(f, true);
if (recalcPaths)
RecalcPaths();
}
public void RemoveFilter(Filter f, bool recalcPaths)
{
try
{
if (f.sampleGrabberForm != null)
f.sampleGrabberForm.Close(); //deletes callback and links to the SG form
if (!disconnecting)
{
f.BaseFilter.Stop();
int hr = graphBuilder.RemoveFilter(f.BaseFilter);
DsError.ThrowExceptionForHR(hr);
}
f.ReleaseBaseFilter();
}
catch (COMException e)
{
ShowCOMException(e, "Error removing filter " + f.Name);
return;
}
catch (Exception e)
{
MessageBox.Show(e.Message, "Exception caught while removing filter "+f.Name);
return;
}
Form.StopAnimation(f);
foreach (Pin p in f.Pins)
Form.StopAnimation(p);
history.RemoveFilter(f.Name);
PlaceFilter(f, false);
f.JoinGraph(null, disconnecting);
filters.Remove(f);
if (recalcPaths)
RecalcPaths();
}
public AMMediaType SampleGrabberMediaType(string realname)
{
Filter flt = filters.Find(delegate(Filter f) { return f.Name == realname; });
if (flt != null && flt.BaseFilter!=null && flt.BaseFilter is ISampleGrabber)
{
ISampleGrabber isg = (ISampleGrabber)flt.BaseFilter;
AMMediaType mt = new AMMediaType();
if (isg.GetConnectedMediaType(mt) >= 0)
return mt;
}
return null;
}
public Filter FilterInPoint(Point point)
{
foreach (Filter f in filters)
if (f.Rect.Contains(point))
return f;
return null;
}
public void PlaceFilter(Filter f, bool put) //put=true - mark its space on field, put=false - cleat
{
int val = put ? 10000 : 0;
field.FillRect(f.Coords.X, f.Coords.Y, f.boxsize.X, f.boxsize.Y, val);
}
public bool CanPlaceFilter(Point place, Filter f, int xborder, int yborder)
{
if (place.X-xborder < 0 || place.Y-yborder < 0) return false;
for (int y = -yborder; y < f.boxsize.Y+yborder; y++)
for (int x = -xborder; x < f.boxsize.X+xborder; x++)
if (field[x + place.X, y + place.Y] >= 10000)
return false;
return true;
}
public bool CanPlaceFilter(Point place, Filter f)
{
return CanPlaceFilter(place, f, 0, 0);
}
protected void Connect(Pin outpin, Pin inpin) //ipins must be already connected
{
PinConnection con = new PinConnection(outpin, inpin);
List<ConStep> path = CalcPath(outpin, inpin, con.ID);
con.path = path;
connections.Add(con);
history.ConnectIfNew(outpin, inpin, con);
}
public void Connect(Pin outpin, Pin inpin, bool intelligent)
{
try
{
FilterGraphTools.ConnectFilters(graphBuilder, outpin.IPin, inpin.IPin, intelligent);
}
catch (COMException e)
{
ShowCOMException(e, "Can't connect pins");
return;
}
catch (Exception e)
{
MessageBox.Show(e.Message, "Exception caught while connecting pins");
return;
}
if (intelligent)
ReloadGraph();
else
{
Connect(outpin, inpin);
history.CommitAdded();
inpin.Filter.ReloadPins();
outpin.Filter.ReloadPins();
}
}
public void RemoveConnection(PinConnection con, bool recalcPaths)
{
if (con == null)
return;
Form.StopAnimation(con);
history.RemoveConnection(con.pins[0], con.pins[1]);
con.Disconnect(true);
connections.Remove(con);
if (recalcPaths)
RecalcPaths();
}
public void RecalcPaths()
{
//clear field
Point gsz = GetGraphSize();
field.FillRect(0, 0, gsz.X, gsz.Y, 0);
ownersmap.FillRect(0, 0, gsz.X, gsz.Y, 0);
//recalc
foreach (Filter f in filters)
PlaceFilter(f, true);
foreach (PinConnection con in connections)
con.path = CalcPath(con.pins[0], con.pins[1], con.ID);
}
public Point GetGraphSize()
{
int mx = 0, my = 0;
foreach (Filter f in filters)
{
int x = f.Coords.X + f.boxsize.X;
mx = Math.Max(mx, x);
int y = f.Coords.Y + f.boxsize.Y;
my = Math.Max(my, y);
}
mx += 10; my += 10;
return new Point(mx, my);
}
public Point GetRealGraphSize()
{
Point sz = GetGraphSize();
sz.X -= 10; sz.Y -= 10;
foreach(PinConnection con in connections)
foreach (ConStep st in con.path)
{
sz.X = Math.Max(sz.X, st.x);
sz.Y = Math.Max(sz.Y, st.y);
}
return sz;
}
int[,] cost;
int[,] dirs;
PriorityQueue<Point> changed;
Point pdst;
public List<ConStep> CalcPath(Pin outpin, Pin inpin, int con_id)
{
Point gsz = GetGraphSize();
int mx = gsz.X, my = gsz.Y;
//calc graph field size
cost = new int[mx, my];
dirs = new int[mx, my];
//get pins coords
Point psrc = new Point(outpin.Filter.Coords.X + outpin.Filter.boxsize.X,
outpin.Filter.Coords.Y + outpin.Rect.Top / cellsize);
pdst = new Point(inpin.Filter.Coords.X-1,
inpin.Filter.Coords.Y + inpin.Rect.Top / cellsize);
//make path field
changed = new PriorityQueue<Point>();//Queue<Point>();
cost[psrc.X, psrc.Y] = 1;
dirs[psrc.X, psrc.Y] = 2;
changed.Enqueue(psrc,1);
Point p;
while (changed.Count > 0)
{
p = changed.Dequeue().Value;
if (p == pdst)
break;
int x = p.X, y = p.Y;
int c = cost[x, y];
if (p.X>0)
CheckPath(p.X - 1, p.Y, c, 0);
if (p.X < mx-1)
CheckPath(p.X + 1, p.Y, c, 2);
if (p.Y > 0)
CheckPath(p.X, p.Y - 1, c+1, 3);
if (p.Y < my - 1)
CheckPath(p.X, p.Y + 1, c+1, 1);
}
//make path
p = pdst;
List<ConStep> path = new List<ConStep>();
int cd = 2;
// 43
// 56
while (true)
{
int nd = dirs[p.X, p.Y], d = 0;
if (cd == 0 && nd == 0) d = 2;
if (cd == 0 && nd == 1) d = 4;
if (cd == 0 && nd == 2) d = 0;
if (cd == 0 && nd == 3) d = 5;
if (cd == 1 && nd == 0) d = 6;
if (cd == 1 && nd == 1) d = 1;
if (cd == 1 && nd == 2) d = 5;
if (cd == 1 && nd == 3) d = 0;
if (cd == 2 && nd == 0) d = 0;
if (cd == 2 && nd == 1) d = 3;
if (cd == 2 && nd == 2) d = 2;
if (cd == 2 && nd == 3) d = 6;
if (cd == 3 && nd == 0) d = 3;
if (cd == 3 && nd == 1) d = 0;
if (cd == 3 && nd == 2) d = 4;
if (cd == 3 && nd == 3) d = 1;
if (d == 0)
break;
ConStep cs = new ConStep();
cs.x = p.X; cs.y = p.Y; cs.dir = d;
path.Add(cs);
field[p.X, p.Y] += 100;
ownersmap[p.X, p.Y] = con_id;
if (p == psrc)
break;
if (nd == 0) p.X++;
if (nd == 2) p.X--;
if (nd == 3) p.Y++;
if (nd == 1) p.Y--;
cd = nd;
}
changed = null; cost = null; //dirs = null;
return path;
}
void CheckPath(int x, int y, int c, int dir)
{
int c1 = c + field[x, y] + 1 + Math.Abs(pdst.X - x) + Math.Abs(pdst.Y - y);
if (cost[x, y] == 0)
{
cost[x, y] = c1;
dirs[x, y] = dir;
Point p1 = new Point(x, y);
changed.Enqueue(p1, c1);
}
}
public void SelectConnection(int con_id)
{
foreach(PinConnection con in connections)
if (con.ID == con_id)
{
SelectedConnection = con;
AMMediaType mt = new AMMediaType();
con.pins[0].IPin.ConnectionMediaType(mt);
MediaTypeProps mtp = MediaTypeProps.CreateMTProps(mt); //new MediaTypeProps(mt);
Program.mainform.propform.SetObject(mtp);
break;
}
}
public PinConnection ConnectionWithID(int con_id)
{
foreach (PinConnection con in connections)
if (con.ID == con_id)
return con;
return null;
}
string logfname = Application.StartupPath + "gep_log.txt";
void log(string s)
{
if (!Program.DoLog) return;
using (StreamWriter w = File.AppendText(logfname))
{
w.WriteLine(s);
}
}
public void RenderFile(string filename)
{
logfname = filename.Substring(0, filename.LastIndexOf('\\') + 1) + "gep_log.txt";
RenderSomething(filename, "Can't render file ");
}
public void RenderURL(string url)
{
RenderSomething(url, "Can't render URL ");
}
void RenderSomething(string filename, string errmsg)
{
try {
log("graphBuilder.RenderFile " + filename);
int hr = graphBuilder.RenderFile(filename, null);
DsError.ThrowExceptionForHR(hr);
log("RenderFile ok");
}
catch (COMException e)
{
ShowCOMException(e, errmsg + filename);
return;
}
catch (Exception e)
{
MessageBox.Show(e.Message, errmsg + filename);
return;
}
ReloadGraph();
log("Rendering done.");
}
public void AddSourceFilter(string filename)
{
try
{
IBaseFilter ifilter;
int hr = graphBuilder.AddSourceFilter(filename, filename, out ifilter);
DsError.ThrowExceptionForHR(hr);
}
catch (COMException e)
{
ShowCOMException(e, "Can't add source filter for " + filename);
return;
}
catch (Exception e)
{
MessageBox.Show(e.Message, "Can't add source filter for " + filename);
return;
}
ReloadGraph();
}
public void RenderPin(Pin pin)
{
try
{
int hr = graphBuilder.Render(pin.IPin);
DsError.ThrowExceptionForHR(hr);
}
catch (COMException e)
{
ShowCOMException(e, "Can't render pin");
return;
}
catch (Exception e)
{
MessageBox.Show(e.Message, "Error while rendering pin");
return;
}
ReloadGraph();
}
public void ReloadFilters()
{
log("reload filters..");
IEnumFilters ef;
ClearFiltersSelection();
ClearConnections();
filter_positions.Clear();
foreach (Filter f in filters)
filter_positions.Add(f.Name, f.Coords);
filters.Clear();
log("reload_filters 1");
try
{
int hr = graphBuilder.EnumFilters(out ef);
DsError.ThrowExceptionForHR(hr);
IBaseFilter[] fs = new IBaseFilter[1];
IntPtr fetched = Marshal.AllocHGlobal(4);
while ((hr = ef.Next(1, fs, fetched)) == 0)
{
log("reload_filters 2");
FilterInfo fi;
fs[0].QueryFilterInfo(out fi);
log("reload_filters: "+fi.achName);
Filter ff = FindFilterByName(fi.achName);
if (ff == null) //not found
{
ff = new Filter(fs[0]);
AddFilterHere(ff, false, null);
history.AddFilterIfNew(ff.filterProps, ff.Name, ff.srcFileName, ff.dstFileName, ff);
} else
ff.ReloadPins();
log("reload_filters 3");
foreach (Pin pin in ff.Pins)
{
log("reload_filters 4: "+pin.Name);
IPin ip = pin.IPin, connected_ipin;
hr = ip.ConnectedTo(out connected_ipin);
if (hr != 0) continue;
PinInfo cpi;
connected_ipin.QueryPinInfo(out cpi);
FilterInfo cfi;
cpi.filter.QueryFilterInfo(out cfi);
Filter connected_filter = FindFilterByName(cfi.achName);
if (connected_filter != null)
{
Pin cp = connected_filter.FindPinByName(connected_filter.Name + "." + cpi.name);
if (cp != null)
{
string con_uniqname = (pin.Direction == PinDirection.Input) ?
cp.UniqName + "-" + pin.UniqName : pin.UniqName + "-" + cp.UniqName;
PinConnection con = FindConnectionByName(con_uniqname);
if (con == null)
if (pin.Direction == PinDirection.Input)
Connect(cp, pin);
else
Connect(pin, cp);
}
}
DsUtils.FreePinInfo(cpi);
}
}
Marshal.FreeHGlobal(fetched);
if (hr < 0)
DsError.ThrowExceptionForHR(hr);
}
catch (COMException e)
{
ShowCOMException(e, "Error while enumerating filters in the graph");
return;
}
/*catch (Exception e)
{
MessageBox.Show(e.Message, "Error while enumerating filters in the graph");
return;
}*/
log("reload_filters: almost done");
history.CommitAdded();
log("reload_filters: done");
}
public Filter FindFilterByName(string name)
{
return filters.Find(delegate(Filter t) { return t.OrgName == name; });
}
PinConnection FindConnectionByName(string name)
{
return connections.Find(delegate(PinConnection c) { return c.UniqName == name; });
}
void ClearConnections()
{
foreach (PinConnection con in connections)
con.Disconnect(false);
connections.Clear();
}
public void LayoutFilters()
{
DynArray<List<Filter>> grid = new DynArray<List<Filter>>();
DynArray<int> colWidths = new DynArray<int>();
int maxst = 0;
foreach (Filter flt in filters)
{
int st = Math.Max(flt.Stage, 0);
maxst = Math.Max(maxst, st);
Filterz.rch.EnsureInited();
if (grid[st] == null)
grid[st] = new List<Filter>();
grid[st].Add(flt);
colWidths[st] = Math.Max(colWidths[st], flt.boxsize.X);
flt.PropagateWeight();
PlaceFilter(flt, false);
}
DynArray<int> Xs = new DynArray<int>();
int x = 1;
for(int i=1; i<=maxst; i++)
{
Xs[i] = x;
x += colWidths[i] + 2;
int y = 1;
if (grid[i] != null)
{
grid[i].Sort(delegate(Filter a, Filter b) { return a.weight - b.weight; });
for (int j = 0; j < grid[i].Count; j++)
{
grid[i][j].Coords = new Point(Xs[i], y);
PlaceFilter(grid[i][j], true);
y += grid[i][j].boxsize.Y + 1;
}
}
}
}
void LayoutFiltersManual() //must be called after LayoutFilters
{
foreach (Filter f in filters)
PlaceFilter(f, false);
Point pos;
foreach (Filter f in filters)
if (filter_positions.TryGetValue(f.Name, out pos))
{
f.Coords = pos;
PlaceFilter(f, true);
}
foreach (Filter f in filters)
if (!filter_positions.TryGetValue(f.Name, out pos))
{
f.Coords = FindNearPlaceForFilter(f, f.Coords);
PlaceFilter(f, true);
}
}
Point FindPlaceForFilter(Filter f)
{
Point bestplace = new Point(1, 1);
if (f.HasFreePins(PinDirection.Input))
{
int maxd = 10000;
foreach (Filter ft in filters)
if (ft.HasFreePins(PinDirection.Output))
{
Point place = ft.Coords;
place.X += ft.boxsize.X + 2;
place = FindNearPlaceForFilter(f, place);
//while (!CanPlaceFilter(place, f))
// place.X++;
if (place.X + place.Y < maxd)
{
bestplace = place;
maxd = place.X + place.Y;
}
}
//if (maxd < 10000) //found something
// bestplace.X += 2;
}
else
bestplace = FindNearPlaceForFilter(f, bestplace);
while (!CanPlaceFilter(bestplace, f)) {
while (!CanPlaceFilter(bestplace, f))
bestplace.Y++;
bestplace.Y++;
}
return bestplace;
}
Point FindNearPlaceForFilter(Filter f, Point orgpos)
{
if (CanPlaceFilter(orgpos, f))
return orgpos;
for (int r = 1; r < 99; r++)
{
for (int x = -r; x < r; x++)
{
Point p = new Point(orgpos.X + x, orgpos.Y - r);
if (CanPlaceFilter(p, f, 2, 1)) return p;
}
for (int y = -r; y < r; y++)
{
Point p = new Point(orgpos.X + r, orgpos.Y + y);
if (CanPlaceFilter(p, f, 2, 1)) return p;
}
for (int x = r-1; x >= -r; x--)
{
Point p = new Point(orgpos.X + x, orgpos.Y + r);
if (CanPlaceFilter(p, f, 2, 1)) return p;
}
for (int y = r-1; y >= -r; y--)
{
Point p = new Point(orgpos.X - r, orgpos.Y + y);
if (CanPlaceFilter(p, f, 2, 1)) return p;
}
}
return orgpos;
}
public static string GuidToString(Guid g)
{
return "{" + g.ToString().ToUpperInvariant()+ "}";
}
public static void ShowCOMException(COMException e, string message)
{
MessageBox.Show(e.ErrorCode.ToString("X") + ": " + e.Message, message, MessageBoxButtons.OK, MessageBoxIcon.Error);
}
public static void CheckHR(int hr, string action)
{
try { DsError.ThrowExceptionForHR(hr); }
catch (COMException e) {
throw new COMException(e.Message + "\n\nin\n" + action, e.ErrorCode);
}
}
public void SaveGraph(string filename)
{
try
{
FilterGraphTools.SaveGraphFile(graphBuilder, filename);
}
catch (COMException e)
{
ShowCOMException(e, "Error saving graph "+filename);
}
catch (Exception e)
{
MessageBox.Show(e.Message, "Exception saving graph " + filename);
}
}
public delegate void on_graph_load();
public bool LoadGraph(string filename, on_graph_load onload)
{
try
{
Clear();
FilterGraphTools.LoadGraphFile(graphBuilder, filename);
onload();
ReloadGraph();
return true;
}
catch (COMException e)
{
ShowCOMException(e, "Error loading graph " + filename);
}
catch (Exception e)
{
MessageBox.Show(e.Message, "Can't load graph");
}
return false;
}
public void Clear() //clears selection, filters and connections, removing filters from DS graph
{
if (!disconnecting) Stop();
ClearFiltersSelection();
selectedFilters.AddRange(filters);
foreach (Filter f in selectedFilters)
RemoveFilter(f, false);
ClearFiltersSelection();
}
public void Close() //release all objects
{
disconnecting = isFromRot;
Clear();
mediaControl = null;
mediaSeeking = null;
mediaEvent = null;
//Marshal.FreeHGlobal(evpar1);
//Marshal.FreeHGlobal(evpar2);
Marshal.ReleaseComObject(graphBuilder);
graphBuilder = null;
if (rot_entry != null)
{
rot_entry.Dispose();
rot_entry = null;
}
GC.Collect();
}
/// <summary> release everything. </summary>
public void Dispose()
{
GC.SuppressFinalize(this);
//Close();
}
~Graph()
{
Dispose();
}
public void Run()
{
try
{
int hr = mediaControl.Run();
DsError.ThrowExceptionForHR(hr);
}
catch (COMException e)
{
ShowCOMException(e, "Can't run the graph");
}
catch (Exception e)
{
MessageBox.Show(e.Message, "Exception caught while running the graph");
}
}
public void Pause()
{
try
{
int hr = mediaControl.Pause();
DsError.ThrowExceptionForHR(hr);
}
catch (COMException e)
{
ShowCOMException(e, "Can't pause the graph");
}
catch (Exception e)
{
MessageBox.Show(e.Message, "Exception caught while pausing the graph");
}
}
public void Stop()
{
try
{
int hr = mediaControl.Stop();
DsError.ThrowExceptionForHR(hr);
}
catch (COMException e)
{
ShowCOMException(e, "Can't stop the graph");
}
catch (Exception e)
{
MessageBox.Show(e.Message, "Error while stopping the graph");
}
}
static string RefTimeToString(long rt)
{
StringBuilder sb = new StringBuilder();
long totsec = rt / 10000000;
long ssec = (rt / 100000) % 100;
long sec = totsec % 60;
long min = (totsec / 60) % 60;
long hr = totsec / 3600;
if (hr > 0)
sb.AppendFormat("{0}:",hr);
if (hr > 0 || min > 0)
sb.AppendFormat("{0:D2}:", min);
sb.AppendFormat("{0:D2},{1:D2}", sec, ssec);
return sb.ToString();
}
public void UpdateState() //called from timer once a second
{
try
{
if (mediaControl != null)
{
FilterState fs;
if (mediaControl.GetState(200, out fs) >= 0)
state = fs.ToString();
}
if (mediaSeeking != null)
{
mediaSeeking.GetPositions(out currentPosition, out totalDuration);
positions = RefTimeToString(currentPosition) + " / " + RefTimeToString(totalDuration);
}
foreach (Filter f in filters)
f.UpdateState();
}
catch
{ }
}
string state;
public string State { get { return state; } }
string positions; //"00,50 / 13,42"
public string Positions { get { return positions; } }
long currentPosition=0, totalDuration=0;
public long Position
{
get { return currentPosition; }
set
{
if (mediaSeeking != null)
{
currentPosition = value;
mediaSeeking.SetPositions(currentPosition, AMSeekingSeekingFlags.AbsolutePositioning, totalDuration, AMSeekingSeekingFlags.AbsolutePositioning);
}
}
}
public long Duration { get { return totalDuration; } }
private bool useClock = true;
public bool UseClock
{
get { return useClock; }
set
{
if (value)
{
graphBuilder.SetDefaultSyncSource();
useClock = true;
}
else
{
try
{
IMediaFilter imf = (IMediaFilter)graphBuilder;
int hr = imf.SetSyncSource(null);
DsError.ThrowExceptionForHR(hr);
useClock = false;
}
catch (COMException e)
{
ShowCOMException(e, "Exception caught when setting clock to NULL");
}