public override void Activation(MHEngine engine)
{
if (m_fRunning)
{
return;
}
base.Activation(engine);
// We're supposed to apply Activation to each of the "items" but it isn't clear
// exactly what that means. Assume it means each of the visibles.
for (int i = 0; i < m_TokenGrpItems.Size; i++)
{
MHObjectRef pObject = m_TokenGrpItems.GetAt(i).Object;
// The object reference may be the null reference.
// Worse: it seems that sometimes in BBC's MHEG the reference simply doesn't exist.
if (pObject.IsSet())
{
try
{
engine.FindObject(m_TokenGrpItems.GetAt(i).Object).Activation(engine);
} catch (MHEGException) {}
}
}
engine.EventTriggered(this, EventTokenMovedTo, new MHUnion(m_nTokenPosition));
m_fRunning = true;
engine.EventTriggered(this, EventIsRunning);
}
protected void TransferToken(int newPos, MHEngine engine)
{
if (newPos != m_nTokenPosition)
{
engine.EventTriggered(this, EventTokenMovedFrom, new MHUnion(m_nTokenPosition));
m_nTokenPosition = newPos;
engine.EventTriggered(this, EventTokenMovedTo, new MHUnion(m_nTokenPosition));
}
}
public override void ContentArrived(byte[] data, MHEngine engine)
{
Region updateArea = GetVisibleArea(); // If there's any content already we have to redraw it.
if (m_pContent == null)
{
return; // Shouldn't happen.
}
int nCHook = m_nContentHook;
if (nCHook == 0)
{
nCHook = engine.GetDefaultBitmapCHook();
}
// TODO: What if we can't convert it?
if (nCHook == 4)
{ // PNG.
m_pContent.CreateFromPNG(data);
}
else if (nCHook == 2)
{ // MPEG I-frame.
m_pContent.CreateFromMPEG(data);
}
else
{
throw new MHEGException("Unknown bitmap content hook " + nCHook);
}
updateArea.Union(GetVisibleArea()); // Redraw this bitmap.
engine.Redraw(updateArea); // Mark for redrawing
// Now signal that the content is available.
engine.EventTriggered(this, EventContentAvailable);
}
public override void ContentArrived(byte[] data, MHEngine engine)
{
CreateContent(data, engine);
// Now signal that the content is available.
engine.EventTriggered(this, EventContentAvailable);
m_NeedsRedraw = true;
}
// Actions implemented
public override void TestVariable(int nOp, MHUnion parm, MHEngine engine)
{
parm.CheckType(MHUnion.U_String);
int nRes = m_Value.Compare(parm.String);
bool fRes = false;
switch (nOp)
{
case TC_Equal: fRes = (nRes == 0); break;
case TC_NotEqual: fRes = (nRes != 0); break;
/* case TC_Less: fRes = (m_nValue < parm.Int); break;
* case TC_LessOrEqual: fRes = (m_nValue <= parm.Int); break;
* case TC_Greater: fRes = (m_nValue > parm.Int); break;
* case TC_GreaterOrEqual: fRes = (m_nValue >= parm.Int); break;*/
default: throw new MHEGException("Invalid comparison for string"); // Shouldn't ever happen
}
MHOctetString sample1 = new MHOctetString(m_Value, 0, 10);
MHOctetString sample2 = new MHOctetString(parm.String, 0, 10);
Logging.Log(Logging.MHLogDetail, "Comparison " + TestToString(nOp) + " between " + sample1.Printable()
+ " and " + sample2.Printable() + " => " + (fRes ? "true" : "false"));
engine.EventTriggered(this, EventTestEvent, new MHUnion(fRes));
}
// Actions implemented
public override void TestVariable(int nOp, MHUnion parm, MHEngine engine)
{
parm.CheckType(MHUnion.U_Int);
bool fRes = false;
switch (nOp)
{
case TC_Equal: fRes = (m_nValue == parm.Int); break;
case TC_NotEqual: fRes = (m_nValue != parm.Int); break;
case TC_Less: fRes = (m_nValue < parm.Int); break;
case TC_LessOrEqual: fRes = (m_nValue <= parm.Int); break;
case TC_Greater: fRes = (m_nValue > parm.Int); break;
case TC_GreaterOrEqual: fRes = (m_nValue >= parm.Int); break;
default: throw new MHEGException("Invalid comparison for int"); // Shouldn't ever happen
}
Logging.Log(Logging.MHLogDetail, "Comparison " + TestToString(nOp) + " between " + m_nValue
+ " and " + parm.Int + " => " + (fRes ? "true" : "false"));
engine.EventTriggered(this, EventTestEvent, new MHUnion(fRes));
}
// The MHEG corrigendum allows SetData to be targeted to a stream so
// the content ref could change while the stream is playing.
// Not currently handled.
public override void ContentPreparation(MHEngine engine)
{
engine.EventTriggered(this, EventContentAvailable); // Perhaps test for the streams being available?
for (int i = 0; i < m_Multiplex.Size; i++)
{
m_Multiplex.GetAt(i).SetStreamRef(m_ContentRef);
}
}
public override void Activation(MHEngine engine)
{
if (RunningStatus)
{
return;
}
base.Activation(engine);
engine.EventTriggered(this, EventIsRunning);
}
public override void Activation(MHEngine engine)
{
if (RunningStatus) return;
base.Activation(engine);
m_fRunning = true;
engine.Redraw(GetVisibleArea()); // Display the visible.
engine.EventTriggered(this, EventIsRunning);
}
public override void Deactivation(MHEngine engine)
{
if (!RunningStatus)
{
return;
}
engine.EventTriggered(this, EventTokenMovedFrom, new MHUnion(m_nTokenPosition));
base.Deactivation(engine);
}
public override void Activation(MHEngine engine)
{
if (m_fRunning)
{
return;
}
base.Activation(engine);
m_fRunning = true;
engine.EventTriggered(this, EventIsRunning);
}
public void Deselect(int nIndex, MHEngine engine)
{
MHListItem pListItem = m_ItemList[nIndex - 1];
if (pListItem == null || !pListItem.Selected)
{
return; // Ignore if not selected.
}
pListItem.Selected = false;
engine.EventTriggered(this, EventItemDeselected, new MHUnion(nIndex));
}
public override void Perform(MHEngine engine)
{
// The target is always the current scene so we ignore it here.
MHObjectRef target = new MHObjectRef();
MHObjectRef source = new MHObjectRef();
m_Target.GetValue(target, engine); // TODO: Check this is the scene?
m_EventSource.GetValue(source, engine);
// Generate the event.
if (m_EventData.Type == MHParameter.P_Null)
{
engine.EventTriggered(engine.FindObject(source), m_EventType);
}
else
{
MHUnion data = new MHUnion();
data.GetValueFrom(m_EventData, engine);
engine.EventTriggered(engine.FindObject(source), m_EventType, data);
}
}
public override void ContentPreparation(MHEngine engine)
{
if (m_ContentType == IN_IncludedContent)
{
// Included content is there - generate ContentAvailable.
engine.EventTriggered(this, EventContentAvailable);
}
else if (m_ContentType == IN_ReferencedContent)
{
// We are requesting external content
engine.CancelExternalContentRequest(this);
engine.RequestExternalContent(this);
}
}
public override void Activation(MHEngine engine)
{
if (RunningStatus)
{
return;
}
base.Activation(engine);
if (m_fRestarting) // Set by Quit
{
engine.AddActions(m_OnRestart);
engine.RunActions();
}
engine.EventTriggered(this, EventIsRunning);
}
// Actions implemented
public override void TestVariable(int nOp, MHUnion parm, MHEngine engine)
{
parm.CheckType(MHUnion.U_ContentRef);
bool fRes = false;
switch (nOp)
{
case TC_Equal: fRes = m_Value.Equal(parm.ContentRef, engine); break;
case TC_NotEqual: fRes = !m_Value.Equal(parm.ContentRef, engine); break;
default: throw new MHEGException("Invalid comparison for Content ref");
}
engine.EventTriggered(this, EventTestEvent, new MHUnion(fRes));
}
public override void Activation(MHEngine engine)
{
if (m_fRunning)
{
return;
}
base.Activation(engine);
// Start playing all active stream components.
for (int i = 0; i < m_Multiplex.Size; i++)
{
m_Multiplex.GetAt(i).BeginPlaying(engine);
}
m_fRunning = true;
engine.EventTriggered(this, EventIsRunning);
}
public override void TestVariable(int nOp, MHUnion parm, MHEngine engine)
{
parm.CheckType(MHUnion.U_Bool);
bool fRes = false;
switch (nOp)
{
case TC_Equal: fRes = m_fValue == parm.Bool; break;
case TC_NotEqual: fRes = m_fValue != parm.Bool; break;
default: throw new MHEGException("Invalid comparison for bool");
}
Logging.Log(Logging.MHLogDetail, "Comparison " + TestToString(nOp) + " between " + (m_fValue ? "true" : "false")
+ " and " + (parm.Bool ? "true" : "false") + " => " + (fRes ? "true" : "false"));
engine.EventTriggered(this, EventTestEvent, new MHUnion(fRes));
}
public void Select(int nIndex, MHEngine engine)
{
MHListItem pListItem = m_ItemList[nIndex - 1];
if (pListItem == null || pListItem.Selected)
{
return; // Ignore if already selected.
}
if (!m_fMultipleSelection)
{
// Deselect any existing selections.
for (int i = 0; i < (int)m_ItemList.Count; i++)
{
if (m_ItemList[i].Selected)
{
Deselect(i + 1, engine);
}
}
}
pListItem.Selected = true;
engine.EventTriggered(this, EventItemSelected, new MHUnion(nIndex));
}
// Activation for Audio is defined in the corrigendum
public override void Activation(MHEngine engine)
{
if (m_fRunning)
{
return;
}
base.Activation(engine);
// Beginning presentation is started by the Stream object.
m_fRunning = true;
engine.EventTriggered(this, EventIsRunning);
if (m_fStreamPlaying && m_streamContentRef.IsSet())
{
string stream = "";
MHOctetString str = m_streamContentRef.ContentRef;
if (str.Size != 0)
{
stream = str.ToString();
}
engine.GetContext().BeginAudio(stream, m_nComponentTag);
}
}
// Checks the timers and fires any relevant events. Returns the millisecs to the
// next event or zero if there aren't any.
public int CheckTimers(MHEngine engine)
{
TimeSpan currentTime = MHTimer.getCurrentTimeSpan(); // Get current time
int nMSecs = 0;
List <MHTimer> executedTimers = new List <MHTimer>();
for (int i = 0; i < m_Timers.Count; i++)
{
MHTimer timer = m_Timers[i];
// Use <= rather than < here so we fire timers with zero time immediately.
if (timer.PositionTimeSpan <= currentTime)
{
// If the time has passed trigger the event and remove the timer from the queue.
engine.EventTriggered(this, EventTimerFired, new MHUnion(timer.Identifier));
executedTimers.Add(timer); // Add to list of executed timers which are removed later
}
else
{
// This has not yet expired. Set "nMSecs" to the earliest time we have.
int nMSecsToGo = timer.PositionTimeSpan.Subtract(currentTime).Milliseconds;
if (nMSecs == 0 || nMSecsToGo < nMSecs)
{
nMSecs = nMSecsToGo;
}
}
}
// Remove all executed timers
for (int i = 0; i < executedTimers.Count; i++)
{
MHTimer timer = executedTimers[i];
m_Timers.Remove(timer);
}
return(nMSecs);
}
public void Update(MHEngine engine)
{
if (m_ItemList.Count == 0)
{ // Special cases when the list becomes empty
if (m_fFirstItemDisplayed)
{
m_fFirstItemDisplayed = false;
engine.EventTriggered(this, EventFirstItemPresented, new MHUnion(false));
}
if (m_fLastItemDisplayed)
{
m_fLastItemDisplayed = false;
engine.EventTriggered(this, EventLastItemPresented, new MHUnion(false));
}
}
else
{ // Usual case.
int i = -1;
foreach (MHListItem p in m_ItemList)
{
i++;
MHRoot pVis = p.Visible;
int nCell = i + 1 - m_nFirstItem; // Which cell does this item map onto?
if (nCell >= 0 && nCell < m_Positions.Size)
{
if (i == 0 && !m_fFirstItemDisplayed)
{
m_fFirstItemDisplayed = true;
engine.EventTriggered(this, EventFirstItemPresented, new MHUnion(true));
}
if (i == (int)m_ItemList.Count - 1 && !m_fLastItemDisplayed)
{
m_fLastItemDisplayed = true;
engine.EventTriggered(this, EventLastItemPresented, new MHUnion(true));
}
pVis.SetPosition(m_Positions.GetAt(i - m_nFirstItem + 1).X, m_Positions.GetAt(i - m_nFirstItem + 1).Y, engine);
if (!pVis.RunningStatus)
{
pVis.Activation(engine);
}
}
else
{
if (i == 0 && m_fFirstItemDisplayed)
{
m_fFirstItemDisplayed = false;
engine.EventTriggered(this, EventFirstItemPresented, new MHUnion(false));
}
if (i == (int)m_ItemList.Count - 1 && m_fLastItemDisplayed)
{
m_fLastItemDisplayed = false;
engine.EventTriggered(this, EventLastItemPresented, new MHUnion(false));
}
if (pVis.RunningStatus)
{
pVis.Deactivation(engine); pVis.ResetPosition();
}
}
}
}
// Generate the HeadItems and TailItems events. Even in the MHEG corrigendum this is unclear.
// I'm not at all sure this is right.
if (m_nLastFirstItem != m_nFirstItem)
{
engine.EventTriggered(this, EventHeadItems, new MHUnion(m_nFirstItem));
}
if (m_nLastCount - m_nLastFirstItem != (int)m_ItemList.Count - m_nFirstItem)
{
engine.EventTriggered(this, EventTailItems, new MHUnion(m_ItemList.Count - m_nFirstItem));
}
m_nLastCount = m_ItemList.Count;
m_nLastFirstItem = m_nFirstItem;
}
public override void CallProgram(bool fIsFork, MHObjectRef success, MHSequence <MHParameter> args, MHEngine engine)
{
if (!m_fAvailable)
{
Preparation(engine);
}
if (m_fRunning)
{
return; // Strictly speaking there should be only one instance of a program running at a time.
}
Activation(engine);
Logging.Log(Logging.MHLogDetail, "Calling program " + m_Name.Printable());
try
{
// Run the code.
if (m_Name.ToString().Equals("GCD"))
{
// GetCurrentDate - returns local time.
GetCurrentDate(success, args, engine);
}
else if (m_Name.ToString().Equals("FDa"))
{
// FormatDate
FormatDate(success, args, engine);
}
else if (m_Name.ToString().Equals("GDW"))
{
// GetDayOfWeek - returns the day of week that the date occurred on.
GetDayOfWeek(success, args, engine);
}
else if (m_Name.ToString().Equals("Rnd"))
{
// Random
Random(success, args, engine);
}
else if (m_Name.ToString().Equals("CTC"))
{
// CastToContentRef
CastToContentRef(success, args, engine);
}
else if (m_Name.ToString().Equals("CTO"))
{
// CastToObjectRef
CastToObjectRef(success, args, engine);
}
else if (m_Name.ToString().Equals("GSL"))
{
// GetStringLength
GetStringLength(success, args, engine);
}
else if (m_Name.ToString().Equals("GSS"))
{
// GetSubString
GetSubString(success, args, engine);
}
else if (m_Name.ToString().Equals("SSS"))
{
// SearchSubString
SearchSubString(success, args, engine);
}
else if (m_Name.ToString().Equals("SES"))
{
// SearchAndExtractSubString
SearchAndExtractSubString(success, args, engine);
}
else if (m_Name.ToString().Equals("GSI"))
{
// SI_GetServiceIndex
SI_GetServiceIndex(success, args, engine);
}
else if (m_Name.ToString().Equals("TIn"))
{
// SI_TuneIndex - Fork not allowed
SI_TuneIndex(success, args, engine);
}
else if (m_Name.ToString().Equals("TII"))
{
// SI_TuneIndexInfo
SI_TuneIndexInfo(success, args, engine);
}
else if (m_Name.ToString().Equals("BSI"))
{
// SI_GetBasicSI
SI_GetBasicSI(success, args, engine);
}
else if (m_Name.ToString().Equals("GBI"))
{
// GetBootInfo
GetBootInfo(success, args, engine);
}
else if (m_Name.ToString().Equals("CCR"))
{
// CheckContentRef
CheckContentRef(success, args, engine);
}
else if (m_Name.ToString().Equals("CGR"))
{
// CheckGroupIDRef
CheckGroupIDRef(success, args, engine);
}
else if (m_Name.ToString().Equals("VTG"))
{
// VideoToGraphics
VideoToGraphics(success, args, engine);
}
else if (m_Name.ToString().Equals("SWA"))
{
// SetWidescreenAlignment
SetWidescreenAlignment(success, args, engine);
}
else if (m_Name.ToString().Equals("GDA"))
{
// GetDisplayAspectRatio
GetDisplayAspectRatio(success, args, engine);
}
else if (m_Name.ToString().Equals("CIS"))
{
// CI_SendMessage
CI_SendMessage(success, args, engine);
}
else if (m_Name.ToString().Equals("SSM"))
{
// SetSubtitleMode
SetSubtitleMode(success, args, engine);
}
else if (m_Name.ToString().Equals("WAI"))
{
// WhoAmI
WhoAmI(success, args, engine);
}
else if (m_Name.ToString().Equals("DBG"))
{
// Debug - optional
Debug(success, args, engine);
}
else
{
Logging.Assert(false);
}
}
catch (MHEGException)
{
// If something went wrong set the succeeded flag to false
SetSuccessFlag(success, false, engine);
// And continue on. In particular we need to deactivate.
}
Deactivation(engine);
// At the moment we always treat Fork as Call. If we do get a Fork we should signal that we're done.
if (fIsFork)
{
engine.EventTriggered(this, EventAsyncStopped);
}
}
public override void ContentPreparation(MHEngine engine)
{
// Pretend it's available.
engine.EventTriggered(this, EventContentAvailable);
}
