Ticket #10019: 0009-freemheg-Add-InteractionChannel-streaming-from-netwo.patch

mythtv/libs/libmythfreemheg/Actions.cpp

@@ -44 +44 @@
 class MHUnimplementedAction: public MHElemAction
 {
   public:
-    MHUnimplementedAction(int nTag): MHElemAction("")
+    MHUnimplementedAction(int nTag): MHElemAction(""), m_nTag(nTag)
     {
-        m_nTag = nTag;
+        MHLOG(MHLogWarning, QString("WARN Unimplemented action %1").arg(m_nTag) );
     }
     virtual void Initialise(MHParseNode *, MHEngine *) {}
     virtual void PrintMe(FILE *fd, int /*nTabs*/) const
@@ -297 +297 @@
                 pAction = new MHUnimplementedAction(pElemAction->GetTagNo());
                 break; // Stream
             case C_SET_COUNTER_POSITION:
-                pAction = new MHUnimplementedAction(pElemAction->GetTagNo());
+                pAction = new MHSetCounterPosition;
                 break; // Stream
             case C_SET_COUNTER_TRIGGER:
                 pAction = new MHUnimplementedAction(pElemAction->GetTagNo());
@@ -357 +357 @@
                 pAction = new MHSetSliderValue;
                 break;
             case C_SET_SPEED:
-                pAction = new MHUnimplementedAction(pElemAction->GetTagNo());
+                pAction = new MHSetSpeed;
                 break; // ?
             case C_SET_TIMER:
                 pAction = new MHSetTimer;
@@ -442 +442 @@
                 pAction = new MHSetSliderParameters;
                 break;
 
+            // Added in ETSI ES 202 184 V2.1.1 (2010-01)
+            case C_GET_COUNTER_POSITION: // Stream position
+                pAction = new MHGetCounterPosition;
+                break;
+            case C_GET_COUNTER_MAX_POSITION: // Stream total size
+                pAction = new MHGetCounterMaxPosition;
+                break;
+
             default:
-                MHLOG(MHLogWarning, QString("Unknown action %1").arg(pElemAction->GetTagNo()));
+                MHLOG(MHLogWarning, QString("WARN Unknown action %1").arg(pElemAction->GetTagNo()));
                 // Future proofing: ignore any actions that we don't know about.
                 // Obviously these can only arise in the binary coding.
                 pAction = NULL;

mythtv/libs/libmythfreemheg/BaseClasses.cpp

@@ -588 +588 @@
     }
     else
     {
+        // LVR - Hmm I don't think this is right. Should be: ref.Copy(m_Indirect);
+        // But it's used in several places so workaround in Stream::MHActionGenericObjectRefFix
         MHUnion result;
         MHRoot *pBase = engine->FindObject(m_Indirect);
         pBase->GetVariableValue(result, engine);

mythtv/libs/libmythfreemheg/BaseClasses.h

@@ -184 +184 @@
 {
   public:
     MHObjectRef *GetReference(); // Return the indirect reference or fail if it's direct
-protected:
     bool    m_fIsDirect;
+protected:
     MHObjectRef m_Indirect;
 };
 

mythtv/libs/libmythfreemheg/Engine.cpp

@@ -32 +32 @@
 #include "Logging.h"
 #include "freemheg.h"
 #include "Visible.h"  // For MHInteractible
+#include "Stream.h"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -111 +112 @@
 
             if (! Launch(startObj))
             {
-                MHLOG(MHLogWarning, "MHEG engine auto-boot failed");
+                MHLOG(MHLogNotifications, "NOTE Engine auto-boot failed");
                 return -1;
             }
         }
@@ -242 +243 @@
     return pRes;
 }
 
-// Launch and Spawn
-bool MHEngine::Launch(const MHObjectRef &target, bool fIsSpawn)
+// Determine protocol for a file
+enum EProtocol { kProtoUnknown, kProtoDSM, kProtoCI, kProtoHTTP, kProtoHybrid };
+static EProtocol PathProtocol(const QString& csPath)
 {
-    QString csPath = GetPathName(target.m_GroupId); // Get path relative to root.
+    if (csPath.isEmpty() || csPath.startsWith("DSM:") || csPath.startsWith("~"))
+        return kProtoDSM;
+    if (csPath.startsWith("hybrid:"))
+        return kProtoHybrid;
+    if (csPath.startsWith("http:") || csPath.startsWith("https:"))
+        return kProtoHTTP;
+    if (csPath.startsWith("CI:"))
+        return kProtoCI;
 
-    if (csPath.length() == 0)
-    {
-        return false;    // No file name.
-    }
+    int firstColon = csPath.indexOf(':'), firstSlash = csPath.indexOf('/');
+    if (firstColon > 0 && firstSlash > 0 && firstColon < firstSlash)
+        return kProtoUnknown;
+
+    return kProtoDSM;
+}
 
+// Launch and Spawn
+bool MHEngine::Launch(const MHObjectRef &target, bool fIsSpawn)
+{
     if (m_fInTransition)
     {
-        MHLOG(MHLogWarning, "Launch during transition - ignoring");
+        MHLOG(MHLogWarning, "WARN Launch during transition - ignoring");
         return false;
     }
 
-    QByteArray text;
+    if (target.m_GroupId.Size() == 0) return false; // No file name.
+    QString csPath = GetPathName(target.m_GroupId); // Get path relative to root.
 
     // Check that the file exists before we commit to the transition.
     // This may block if we cannot be sure whether the object is present.
+    QByteArray text;
     if (! m_Context->GetCarouselData(csPath, text))
     {
-        if (CurrentApp())
-        {
-            EventTriggered(CurrentApp(), EventEngineEvent, 2);    // GroupIDRefError
-        }
-
+        if (!m_fBooting)
+            EngineEvent(2); // GroupIDRefError
         return false;
     }
 
@@ -351 +364 @@
 {
     if (m_fInTransition)
     {
-        MHLOG(MHLogWarning, "Quit during transition - ignoring");
+        MHLOG(MHLogWarning, "WARN Quit during transition - ignoring");
         return;
     }
 
@@ -395 +408 @@
     if (m_fInTransition)
     {
         // TransitionTo is not allowed in OnStartUp or OnCloseDown actions.
-        MHLOG(MHLogWarning, "TransitionTo during transition - ignoring");
+        MHLOG(MHLogWarning, "WARN TransitionTo during transition - ignoring");
         return;
     }
 
@@ -405 +418 @@
     }
 
     QString csPath = GetPathName(target.m_GroupId);
-    QByteArray text;
 
     // Check that the file exists before we commit to the transition.
-    if (! m_Context->GetCarouselData(csPath, text))
-    {
-        EventTriggered(CurrentApp(), EventEngineEvent, 2); // GroupIDRefError
+    // This may block if we cannot be sure whether the object is present.
+    QByteArray text;
+    if (! m_Context->GetCarouselData(csPath, text)) {
+        EngineEvent(2); // GroupIDRefError
         return;
     }
 
@@ -482 +495 @@
     m_Interacting = 0;
 
     // Switch to the new scene.
-    CurrentApp()->m_pCurrentScene = (MHScene *) pProgram;
+    CurrentApp()->m_pCurrentScene = static_cast< MHScene* >(pProgram);
     SetInputRegister(CurrentScene()->m_nEventReg);
     m_redrawRegion = QRegion(0, 0, CurrentScene()->m_nSceneCoordX, CurrentScene()->m_nSceneCoordY); // Redraw the whole screen
 
@@ -504 +517 @@
 // Create a canonical path name.  The rules are given in the UK MHEG document.
 QString MHEngine::GetPathName(const MHOctetString &str)
 {
-    QString csPath;
-
-    if (str.Size() != 0)
-    {
-        csPath = QString::fromUtf8((const char *)str.Bytes(), str.Size());
-    }
-
-    if (csPath.left(4) == "DSM:")
-    {
-        csPath = csPath.mid(4);    // Remove DSM:
-    }
-
-    // If it has any other prefix this isn't a request for a carousel object.
-    int firstColon = csPath.indexOf(':'), firstSlash = csPath.indexOf('/');
-
-    if (firstColon > 0 && firstSlash > 0 && firstColon < firstSlash)
-    {
+    if (str.Size() == 0)
         return QString();
-    }
 
-    if (csPath.left(1) == "~")
+    QString csPath = QString::fromUtf8((const char *)str.Bytes(), str.Size());
+    switch (PathProtocol(csPath))
     {
-        csPath = csPath.mid(1);    // Remove ~
+    default:
+    case kProtoUnknown:
+    case kProtoHybrid:
+    case kProtoHTTP:
+    case kProtoCI:
+        return csPath;
+    case kProtoDSM:
+        break;
     }
 
-    // Ignore "CI://"
-    if (csPath.left(2) != "//")   //
+    if (csPath.startsWith("DSM:"))
+        csPath = csPath.mid(4); // Remove DSM:
+    else if (csPath.startsWith("~"))
+        csPath = csPath.mid(1); // Remove ~
+    if (!csPath.startsWith("//"))
     {
         // Add the current application's path name
         if (CurrentApp())
@@ -589 +596 @@
         // an object that may or may not exist at a particular time.
         // Another case was a call to CallActionSlot with an object reference variable
         // that had been initialised to zero.
-        MHLOG(MHLogWarning, QString("Reference %1 not found").arg(oRef.m_nObjectNo));
+        MHLOG(MHLogWarning, QString("WARN Reference %1 not found").arg(oRef.m_nObjectNo));
         throw "FindObject failed";
     }
 
@@ -609 +616 @@
         {
             if ((__mhlogoptions & MHLogActions) && __mhlogStream != 0)   // Debugging
             {
-                fprintf(__mhlogStream, "Action - ");
+                fprintf(__mhlogStream, "[freemheg] Action - ");
                 pAction->PrintMe(__mhlogStream, 0);
                 fflush(__mhlogStream);
             }
@@ -670 +677 @@
         case EventUserInput:
         case EventFocusMoved: // UK MHEG.  Generated by HyperText class
         case EventSliderValueChanged: // UK MHEG.  Generated by Slider class
+        default:
         {
             // Asynchronous events.  Add to the event queue.
             MHAsynchEvent *pEvent = new MHAsynchEvent;
@@ -678 +686 @@
             pEvent->eventData = evData;
             m_EventQueue.enqueue(pEvent);
         }
+        break;
     }
 }
 
@@ -921 +930 @@
         case 101: // Green
         case 102: // Yellow
         case 103: // Blue
+        case 300: // EPG
             EventTriggered(pScene, EventEngineEvent, nCode);
             break;
     }
@@ -939 +949 @@
 
 void MHEngine::EngineEvent(int nCode)
 {
-    EventTriggered(CurrentApp(), EventEngineEvent, nCode);
+    if (CurrentApp())
+        EventTriggered(CurrentApp(), EventEngineEvent, nCode);
+    else if (!m_fBooting)
+        MHLOG(MHLogWarning, QString("WARN EngineEvent %1 but no app").arg(nCode));
+}
+
+void MHEngine::StreamStarted(MHStream *stream, bool bStarted)
+{
+    EventTriggered(stream, bStarted ? EventStreamPlaying : EventStreamStopped);
 }
 
 // Called by an ingredient wanting external content.
@@ -954 +972 @@
 
     // Remove any existing content requests for this ingredient.
     CancelExternalContentRequest(pRequester);
-    QString csPath = GetPathName(pRequester->m_ContentRef.m_ContentRef);
-
-    // Is this actually a carousel object?  It could be a stream.  We should deal
-    // with that separately.
-    if (csPath.isEmpty())
-    {
-        MHLOG(MHLogWarning, "RequestExternalContent empty path");
-        return;
-    }
 
-    QByteArray text;
-
-    if (m_Context->CheckCarouselObject(csPath) && m_Context->GetCarouselData(csPath, text))
+    QString csPath = GetPathName(pRequester->m_ContentRef.m_ContentRef);
+    if (m_Context->CheckCarouselObject(csPath))
     {
         // Available now - pass it to the ingredient.
-        pRequester->ContentArrived((const unsigned char *)text.data(), text.size(), this);
+        QByteArray text;
+        if (m_Context->GetCarouselData(csPath, text))
+        {
+            // If the content is not recognized catch the exception and continue
+            try
+            {
+                pRequester->ContentArrived((const unsigned char *)text.data(), text.size(), this);
+            }
+            catch (char const *)
+            {}
+        }
+        else
+        {
+            MHLOG(MHLogWarning, QString("WARN No file content %1 <= %2")
+                .arg(pRequester->m_ObjectReference.Printable()).arg(csPath));
+            if (kProtoHTTP == PathProtocol(csPath))
+                EngineEvent(203); // 203=RemoteNetworkError if 404 reply
+            EngineEvent(3); // ContentRefError
+        }
     }
     else
     {
         // Need to record this and check later.
-        MHLOG(MHLogLinks, QString("RequestExternalContent %1 pending").arg(csPath));
+        MHLOG(MHLogNotifications, QString("Waiting for %1 <= %2")
+            .arg(pRequester->m_ObjectReference.Printable()).arg(csPath.left(128)) );
         MHExternContent *pContent = new MHExternContent;
         pContent->m_FileName = csPath;
         pContent->m_pRequester = pRequester;
@@ -995 +1022 @@
 
         if (pContent->m_pRequester == pRequester)
         {
-            delete pContent;
+            MHLOG(MHLogNotifications, QString("Cancelled wait for %1")
+                .arg(pRequester->m_ObjectReference.Printable()) );
             it = m_ExternContentTable.erase(it);
+            delete pContent;
             return;
         }
         else
@@ -1009 +1038 @@
 // See if we can satisfy any of the outstanding requests.
 void MHEngine::CheckContentRequests()
 {
-    QList<MHExternContent *>::iterator it = m_ExternContentTable.begin();
-    MHExternContent *pContent;
-
+    QList<MHExternContent*>::iterator it = m_ExternContentTable.begin();
     while (it != m_ExternContentTable.end())
     {
-        pContent = *it;
-        QByteArray text;
-
-        if (m_Context->CheckCarouselObject(pContent->m_FileName) &&
-            m_Context->GetCarouselData(pContent->m_FileName, text))
+        MHExternContent *pContent = *it;
+        if (m_Context->CheckCarouselObject(pContent->m_FileName))
         {
-            // If the content is not recognized catch the exception and continue
-            try
+            // Remove from the list.
+            it = m_ExternContentTable.erase(it);
+
+            QByteArray text;
+            if (m_Context->GetCarouselData(pContent->m_FileName, text))
             {
-                MHLOG(MHLogLinks, QString("CheckContentRequests %1 arrived")
-                      .arg(pContent->m_FileName));
-                pContent->m_pRequester->ContentArrived((const unsigned char *)text.data(),
-                                                       text.size(), this);
+                MHLOG(MHLogNotifications, QString("Received %1 len %2")
+                    .arg(pContent->m_pRequester->m_ObjectReference.Printable())
+                    .arg(text.size()) );
+                // If the content is not recognized catch the exception and continue
+                try
+                {
+                    pContent->m_pRequester->ContentArrived(
+                        (const unsigned char *)text.data(), text.size(), this);
+                }
+                catch (char const *)
+                {}
             }
-            catch (char const *)
+            else
             {
+                MHLOG(MHLogWarning, QString("WARN No file content %1 <= %2")
+                    .arg(pContent->m_pRequester->m_ObjectReference.Printable())
+                    .arg(pContent->m_FileName));
+                if (kProtoHTTP == PathProtocol(pContent->m_FileName))
+                    EngineEvent(203); // 203=RemoteNetworkError if 404 reply
+                EngineEvent(3); // ContentRefError
             }
 
-            // Remove from the list.
             delete pContent;
-            it = m_ExternContentTable.erase(it);
         }
         else if (pContent->m_time.elapsed() > 60000) // TODO Get this from carousel
         {
-            MHLOG(MHLogWarning, QString("CheckContentRequests %1 timed out")
-                  .arg(pContent->m_FileName));
-            delete pContent;
+            // Remove from the list.
             it = m_ExternContentTable.erase(it);
-            EventTriggered(CurrentApp(), EventEngineEvent, 3); // ContentRefError
+
+            MHLOG(MHLogWarning, QString("WARN File timed out %1 <= %2")
+                .arg(pContent->m_pRequester->m_ObjectReference.Printable())
+                .arg(pContent->m_FileName));
+
+            if (kProtoHTTP == PathProtocol(pContent->m_FileName))
+                EngineEvent(203); // 203=RemoteNetworkError if 404 reply
+            EngineEvent(3); // ContentRefError
+
+            delete pContent;
         }
         else
         {
@@ -1121 +1166 @@
     QString csFeat = QString::fromUtf8((const char *)feature.Bytes(), feature.Size());
     QStringList strings = csFeat.split(QRegExp("[\\(\\,\\)]"));
 
+    MHLOG(MHLogNotifications, "NOTE GetEngineSupport " + csFeat);
+
     if (strings[0] == "ApplicationStacking" || strings[0] == "ASt")
     {
         return true;
@@ -1241 +1288 @@
     // We support bitmaps that are partially off screen (don't we?)
     if (strings[0] == "BitmapDecodeOffset" || strings[0] == "BDO")
     {
-        if (strings.count() >= 3 && strings[1] == "10" && (strings[2] == "0" || strings[2] == "1"))
+        if (strings.count() >= 3 && strings[1] == "2" && (strings[2] == "0" || strings[2] == "1"))
+        {
+            return true;
+        }
+        else if (strings.count() >= 2 && (strings[1] == "4" || strings[1] == "6"))
         {
             return true;
         }
@@ -1285 +1336 @@
         }
     }
 
+    // InteractionChannelExtension.
+    if (strings[0] == "ICProfile" || strings[0] == "ICP") {
+        if (strings.count() != 2) return false;
+        if (strings[1] == "0")
+            return true; // // InteractionChannelExtension.
+        if (strings[1] == "1")
+            return false; // ICStreamingExtension.
+        return false;
+    }
+
     // Otherwise return false.
     return false;
 }
@@ -1442 +1503 @@
 void __mhlog(QString logtext)
 {
     QByteArray tmp = logtext.toAscii();
-    fprintf(__mhlogStream, "%s\n", tmp.constData());
+    fprintf(__mhlogStream, "[freemheg] %s\n", tmp.constData());
 }
 
 // Called from the user of the library to set the logging.

mythtv/libs/libmythfreemheg/Engine.h

@@ -117 +117 @@
     // Generate a UserAction event i.e. a key press.
     virtual void GenerateUserAction(int nCode);
     virtual void EngineEvent(int nCode);
+    virtual void StreamStarted(MHStream*, bool bStarted);
 
     // Called from an ingredient to request a load of external content.
     void RequestExternalContent(MHIngredient *pRequester);

mythtv/libs/libmythfreemheg/Presentable.h

@@ -43 +43 @@
     virtual void Stop(MHEngine *engine);
 
     // Additional actions for stream components.
-    virtual void SetStreamRef(MHEngine *, const MHContentRef &) {}
     virtual void BeginPlaying(MHEngine *) {}
     virtual void StopPlaying(MHEngine *) {}
 };

mythtv/libs/libmythfreemheg/Programs.cpp

@@ -29 +29 @@
 #include "Logging.h"
 #include "freemheg.h"
 
+#include <QStringList>
 #include <sys/timeb.h>
 #ifdef __FreeBSD__
 #include <sys/time.h>
@@ -138 +139 @@
     return un.m_nIntVal;
 }
 
+// Return a bool value.  May throw an exception if it isn't the correct type.
+static bool GetBool(MHParameter *parm, MHEngine *engine)
+{
+    MHUnion un;
+    un.GetValueFrom(*parm, engine);
+    un.CheckType(MHUnion::U_Bool);
+    return un.m_fBoolVal;
+}
+
 // Extract a string value.
 static void GetString(MHParameter *parm, MHOctetString &str, MHEngine *engine)
 {
@@ -738 +748 @@
         else if (m_Name.Equal("SSM"))   // SetSubtitleMode
         {
             // Enable or disable subtitles in addition to MHEG.
-            MHERROR("SetSubtitleMode ResidentProgram is not implemented");
+            if (args.Size() == 1) {
+                bool status = GetBool(args.GetAt(0), engine);
+                MHLOG(MHLogNotifications, QString("NOTE SetSubtitleMode %1")
+                    .arg(status ? "enabled" : "disabled"));
+                // TODO Notify player
+                SetSuccessFlag(success, true, engine);
+            }
+            else SetSuccessFlag(success, false, engine);
         }
 
         else if (m_Name.Equal("WAI"))   // WhoAmI
@@ -798 +815 @@
 
         else if (m_Name.Equal("SBI"))   // SetBroadcastInterrupt
         {
-            // Required for InteractionChannelExtension
+            // Required for NativeApplicationExtension
             // En/dis/able program interruptions e.g. green button
-            MHERROR("SetBroadcastInterrupt ResidentProgram is not implemented");
+            if (args.Size() == 1) {
+                bool status = GetBool(args.GetAt(0), engine);
+                MHLOG(MHLogNotifications, QString("NOTE SetBroadcastInterrupt %1")
+                    .arg(status ? "enabled" : "disabled"));
+                // Nothing todo at present
+                SetSuccessFlag(success, true, engine);
+            }
+            else SetSuccessFlag(success, false, engine);
         }
 
-        else if (m_Name.Equal("GIS"))   // GetICStatus
-        {
-            // Required for NativeApplicationExtension
-            MHERROR("GetICStatus ResidentProgram is not implemented");
+        // InteractionChannelExtension
+        else if (m_Name.Equal("GIS")) { // GetICStatus
+            if (args.Size() == 1)
+            {
+                int ICstatus = engine->GetContext()->GetICStatus();
+                MHLOG(MHLogNotifications, "NOTE InteractionChannel " + QString(
+                    ICstatus == 0 ? "active" : ICstatus == 1 ? "inactive" :
+                    ICstatus == 2 ? "disabled" : "undefined"));
+                engine->FindObject(*(args.GetAt(0)->GetReference()))->SetVariableValue(ICstatus);
+                SetSuccessFlag(success, true, engine);
+            }
+            else SetSuccessFlag(success, false, engine);
+        }
+        else if (m_Name.Equal("RDa")) { // ReturnData
+            if (args.Size() >= 3)
+            {
+                MHOctetString string;
+                GetString(args.GetAt(0), string, engine);
+                QString url = QString::fromUtf8((const char *)string.Bytes(), string.Size());
+
+                // Variable name/value pairs
+                QStringList params;
+                int i = 1;
+                for (; i + 2 < args.Size(); i += 2)
+                {
+                    GetString(args.GetAt(i), string, engine);
+                    QString name = QString::fromUtf8((const char *)string.Bytes(), string.Size());
+                    QString val;
+                    MHUnion un;
+                    un.GetValueFrom(*(args.GetAt(i+1)), engine);
+                    switch (un.m_Type) {
+                    case MHUnion::U_Int:
+                        val = QString::number(un.m_nIntVal);
+                        break;
+                    case MHParameter::P_Bool:
+                        val = un.m_fBoolVal ? "true" : "false";
+                        break;
+                    case MHParameter::P_String:
+                        val = QString::fromUtf8((const char*)un.m_StrVal.Bytes(), un.m_StrVal.Size());
+                        break;
+                    case MHParameter::P_ObjRef:
+                        val = un.m_ObjRefVal.Printable();
+                        break;
+                    case MHParameter::P_ContentRef:
+                        val = un.m_ContentRefVal.Printable();
+                        break;
+                    case MHParameter::P_Null:
+                        val = "<NULL>";
+                        break;
+                    default:
+                        val = QString("<type %1>").arg(un.m_Type);
+                        break;
+                    }
+                    params += name + "=" + val;
+                }
+                // TODO
+                MHLOG(MHLogNotifications, "NOTE ReturnData '" + url + "' { " + params.join(" ") + " }");
+                // HTTP response code, 0= none
+                engine->FindObject(*(args.GetAt(i)->GetReference()))->SetVariableValue(0);
+                // HTTP response data
+                string = "";
+                engine->FindObject(*(args.GetAt(i+1)->GetReference()))->SetVariableValue(string);
+                SetSuccessFlag(success, false, engine);
+            }
+            else SetSuccessFlag(success, false, engine);
+        }
+        else if (m_Name.Equal("SHF")) { // SetHybridFileSystem
+            if (args.Size() == 2)
+            {
+                MHOctetString string;
+                GetString(args.GetAt(0), string, engine);
+                QString str = QString::fromUtf8((const char *)string.Bytes(), string.Size());
+                GetString(args.GetAt(1), string, engine);
+                QString str2 = QString::fromUtf8((const char *)string.Bytes(), string.Size());
+                // TODO
+                MHLOG(MHLogNotifications, QString("NOTE SetHybridFileSystem %1=%2")
+                    .arg(str).arg(str2));
+                SetSuccessFlag(success, false, engine);
+            }
+            else SetSuccessFlag(success, false, engine);
         }
 
         else
@@ -908 +1008 @@
         m_Parameters.GetAt(i)->PrintMe(fd, 0);
     }
 
-    fprintf(fd, " )\n");
+    fprintf(fd, " )");
 }
 
 void MHCall::Perform(MHEngine *engine)

mythtv/libs/libmythfreemheg/Root.cpp

@@ -44 +44 @@
 // An action was attempted on an object of a class which doesn't support this.
 void MHRoot::InvalidAction(const char *actionName)
 {
-    MHLOG(MHLogWarning, QString("Action \"%1\" is not understood by class \"%2\"").arg(actionName).arg(ClassName()));
+    MHLOG(MHLogWarning, QString("WARN Action \"%1\" is not understood by class \"%2\"").arg(actionName).arg(ClassName()));
     throw "Invalid Action";
 }
 

mythtv/libs/libmythfreemheg/Root.h

@@ -175 +175 @@
     virtual void ScaleVideo(int /*xScale*/, int /*yScale*/, MHEngine *) { InvalidAction("ScaleVideo"); }
     virtual void SetVideoDecodeOffset(int /*newXOffset*/, int /*newYOffset*/, MHEngine *) { InvalidAction("SetVideoDecodeOffset"); }
     virtual void GetVideoDecodeOffset(MHRoot * /*pXOffset*/, MHRoot * /*pYOffset*/, MHEngine *) { InvalidAction("GetVideoDecodeOffset"); }
+    virtual void GetCounterPosition(MHRoot * /*pPos*/, MHEngine *) { InvalidAction("GetCounterPosition"); }
+    virtual void GetCounterMaxPosition(MHRoot * /*pPos*/, MHEngine *) { InvalidAction("GetCounterMaxPosition"); }
+    virtual void SetCounterPosition(int /*pos*/, MHEngine *) { InvalidAction("SetCounterPosition"); }
+    virtual void SetSpeed(int /*speed 0=stop*/, MHEngine *) { InvalidAction("SetSpeed"); }
 
     // Actions on Interactibles.
     virtual void SetInteractionStatus(bool /*newStatus*/, MHEngine *) { InvalidAction("SetInteractionStatus"); }

mythtv/libs/libmythfreemheg/Stream.cpp

@@ -65 +65 @@
                 m_Multiplex.Append(pRtGraph);
                 pRtGraph->Initialise(pItem, engine);
             }
-
-            // Ignore unknown items
+            else
+            {
+                // Ignore unknown items
+                MHLOG(MHLogWarning, QString("WARN unknown stream type %1")
+                    .arg(pItem->GetTagNo()));
+            }
         }
     }
 
@@ -158 +162 @@
     MHPresentable::Activation(engine);
 
     // Start playing all active stream components.
-    for (int i = 0; i < m_Multiplex.Size(); i++)
-    {
-        m_Multiplex.GetAt(i)->BeginPlaying(engine);
-    }
-
+    BeginPlaying(engine);
+    // subclasses are responsible for setting m_fRunning and generating IsRunning.
     m_fRunning = true;
     engine->EventTriggered(this, EventIsRunning);
 }
@@ -174 +175 @@
         return;
     }
 
-    // Stop playing all active Stream components
-    for (int i = 0; i < m_Multiplex.Size(); i++)
-    {
-        m_Multiplex.GetAt(i)->StopPlaying(engine);
-    }
-
     MHPresentable::Deactivation(engine);
+    StopPlaying(engine);
 }
 
 // The MHEG corrigendum allows SetData to be targeted to a stream so
@@ -188 +184 @@
 void MHStream::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(engine, m_ContentRef);
-    }
+    if (m_fRunning)
+        BeginPlaying(engine);
 }
 
-// TODO: Generate StreamPlaying and StreamStopped events.  These are supposed
-// to be generated as the first and last frames are displayed.
-
 // Return an object if there is a matching component.
 MHRoot *MHStream::FindByObjectNo(int n)
 {
@@ -219 +209 @@
     return NULL;
 }
 
+void MHStream::BeginPlaying(MHEngine *engine)
+{
+    QString stream;
+    MHOctetString &str = m_ContentRef.m_ContentRef;
+    if (str.Size() != 0) stream = QString::fromUtf8((const char *)str.Bytes(), str.Size());
+    if ( !engine->GetContext()->BeginStream(stream, this))
+        engine->EventTriggered(this, EventEngineEvent, 204); // StreamRefError
+
+    // Start playing all active stream components.
+    for (int i = 0; i < m_Multiplex.Size(); i++)
+        m_Multiplex.GetAt(i)->BeginPlaying(engine);
+
+    //engine->EventTriggered(this, EventStreamPlaying);
+}
+
+void MHStream::StopPlaying(MHEngine *engine)
+{
+    // Stop playing all active Stream components
+    for (int i = 0; i < m_Multiplex.Size(); i++)
+        m_Multiplex.GetAt(i)->StopPlaying(engine);
+    engine->GetContext()->EndStream();
+    engine->EventTriggered(this, EventStreamStopped);
+}
+
+void MHStream::GetCounterPosition(MHRoot *pResult, MHEngine *engine)
+{
+    // StreamCounterUnits (mS)
+    pResult->SetVariableValue((int)engine->GetContext()->GetStreamPos());
+}
+
+void MHStream::GetCounterMaxPosition(MHRoot *pResult, MHEngine *engine)
+{
+    // StreamCounterUnits (mS)
+    pResult->SetVariableValue((int)engine->GetContext()->GetStreamMaxPos());
+}
+
+void MHStream::SetCounterPosition(int pos, MHEngine *engine)
+{
+    // StreamCounterUnits (mS)
+    engine->GetContext()->SetStreamPos(pos);
+}
+
+void MHStream::SetSpeed(int speed, MHEngine *engine)
+{
+    engine->GetContext()->StreamPlay(speed);
+}
+
 MHAudio::MHAudio()
 {
     m_nComponentTag = 0;
@@ -275 +312 @@
     m_fRunning = true;
     engine->EventTriggered(this, EventIsRunning);
 
-    if (m_fStreamPlaying && m_streamContentRef.IsSet())
-    {
-        QString stream;
-        MHOctetString &str = m_streamContentRef.m_ContentRef;
-
-        if (str.Size() != 0)
-        {
-            stream = QString::fromUtf8((const char *)str.Bytes(), str.Size());
-        }
-
-        engine->GetContext()->BeginAudio(stream, m_nComponentTag);
-    }
+    if (m_fStreamPlaying)
+        engine->GetContext()->BeginAudio(m_nComponentTag);
 }
 
 // Deactivation for Audio is defined in the corrigendum
@@ -308 +335 @@
     MHPresentable::Deactivation(engine);
 }
 
-void MHAudio::SetStreamRef(MHEngine *engine, const MHContentRef &cr)
-{
-    m_streamContentRef.Copy(cr);
-
-    if (m_fStreamPlaying)
-    {
-        BeginPlaying(engine);
-    }
-}
-
 void MHAudio::BeginPlaying(MHEngine *engine)
 {
     m_fStreamPlaying = true;
-
-    if (m_fRunning && m_streamContentRef.IsSet())
-    {
-        QString stream;
-        MHOctetString &str = m_streamContentRef.m_ContentRef;
-
-        if (str.Size() != 0)
-        {
-            stream = QString::fromUtf8((const char *)str.Bytes(), str.Size());
-        }
-
-        engine->GetContext()->BeginAudio(stream, m_nComponentTag);
-    }
+    if (m_fRunning)
+        engine->GetContext()->BeginAudio(m_nComponentTag);
 }
 
 void MHAudio::StopPlaying(MHEngine *engine)
@@ -491 +497 @@
     }
 
     MHVisible::Activation(engine);
-
-    if (m_fStreamPlaying && m_streamContentRef.IsSet())
-    {
-        QString stream;
-        MHOctetString &str = m_streamContentRef.m_ContentRef;
-
-        if (str.Size() != 0)
-        {
-            stream = QString::fromUtf8((const char *)str.Bytes(), str.Size());
-        }
-
-        engine->GetContext()->BeginVideo(stream, m_nComponentTag);
-    }
+    if (m_fStreamPlaying)
+        engine->GetContext()->BeginVideo(m_nComponentTag);
 }
 
 void MHVideo::Deactivation(MHEngine *engine)
@@ -521 +516 @@
     }
 }
 
-void MHVideo::SetStreamRef(MHEngine *engine, const MHContentRef &cr)
-{
-    m_streamContentRef.Copy(cr);
-
-    if (m_fStreamPlaying)
-    {
-        BeginPlaying(engine);
-    }
-}
-
 void MHVideo::BeginPlaying(MHEngine *engine)
 {
     m_fStreamPlaying = true;
-
-    if (m_fRunning && m_streamContentRef.IsSet())
-    {
-        QString stream;
-        MHOctetString &str = m_streamContentRef.m_ContentRef;
-
-        if (str.Size() != 0)
-        {
-            stream = QString::fromUtf8((const char *)str.Bytes(), str.Size());
-        }
-
-        engine->GetContext()->BeginVideo(stream, m_nComponentTag);
-    }
+    if (m_fRunning)
+        engine->GetContext()->BeginVideo(m_nComponentTag);
 }
 
 void MHVideo::StopPlaying(MHEngine *engine)
@@ -581 +555 @@
     MHVisible::PrintMe(fd, nTabs);
     //
 }
+
+// Fix for MHActionGenericObjectRef
+void MHActionGenericObjectRefFix::Perform(MHEngine *engine)
+{
+    MHObjectRef ref;
+    if (m_RefObject.m_fIsDirect)
+        m_RefObject.GetValue(ref, engine);
+    else
+        ref.Copy(*m_RefObject.GetReference());
+    CallAction(engine, Target(engine), engine->FindObject(ref));
+}

mythtv/libs/libmythfreemheg/Stream.h

@@ -44 +44 @@
     virtual void ContentPreparation(MHEngine *engine);
 
     virtual MHRoot *FindByObjectNo(int n);
+
+    virtual void BeginPlaying(MHEngine *engine);
+    virtual void StopPlaying(MHEngine *engine);
+
+    // Actions
+    virtual void GetCounterPosition(MHRoot *, MHEngine *);
+    virtual void GetCounterMaxPosition(MHRoot *, MHEngine *);
+    virtual void SetCounterPosition(int /*pos*/, MHEngine *);
+    virtual void SetSpeed(int, MHEngine *engine);
+
   protected:
     MHOwnPtrSequence <MHPresentable> m_Multiplex;
     enum Storage { ST_Mem = 1, ST_Stream = 2 } m_nStorage;
@@ -62 +72 @@
     virtual void Activation(MHEngine *engine);
     virtual void Deactivation(MHEngine *engine);
 
-    virtual void SetStreamRef(MHEngine *, const MHContentRef &);
     virtual void BeginPlaying(MHEngine *engine);
     virtual void StopPlaying(MHEngine *engine);
 
@@ -71 +80 @@
     int m_nOriginalVol;
 
     bool m_fStreamPlaying;
-    MHContentRef m_streamContentRef;
 };
 
 class MHVideo : public MHVisible  
@@ -97 +105 @@
     virtual void SetVideoDecodeOffset(int newXOffset, int newYOffset, MHEngine *);
     virtual void GetVideoDecodeOffset(MHRoot *pXOffset, MHRoot *pYOffset, MHEngine *);
 
-    virtual void SetStreamRef(MHEngine *, const MHContentRef &);
     virtual void BeginPlaying(MHEngine *engine);
     virtual void StopPlaying(MHEngine *engine);
 
@@ -109 +116 @@
     int     m_nDecodeWidth, m_nDecodeHeight;
 
     bool m_fStreamPlaying;
-    MHContentRef m_streamContentRef;
 };
 
 // Real-time graphics - not needed for UK MHEG.
@@ -146 +152 @@
     virtual void CallAction(MHEngine *engine, MHRoot *pTarget, MHRoot *pArg1, MHRoot *pArg2) { pTarget->GetVideoDecodeOffset(pArg1, pArg2, engine); }
 };
 
+class MHActionGenericObjectRefFix: public MHActionGenericObjectRef
+{
+public:
+    MHActionGenericObjectRefFix(const char *name) : MHActionGenericObjectRef(name) {}
+    virtual void Perform(MHEngine *engine);
+};
+
+class MHGetCounterPosition: public MHActionGenericObjectRefFix
+{
+public:
+    MHGetCounterPosition(): MHActionGenericObjectRefFix(":GetCounterPosition")  {}
+    virtual void CallAction(MHEngine *engine, MHRoot *pTarget, MHRoot *pArg)
+        { pTarget->GetCounterPosition(pArg, engine); }
+};
+
+class MHGetCounterMaxPosition: public MHActionGenericObjectRefFix
+{
+public:
+    MHGetCounterMaxPosition(): MHActionGenericObjectRefFix(":GetCounterMaxPosition")  {}
+    virtual void CallAction(MHEngine *engine, MHRoot *pTarget, MHRoot *pArg)
+        { pTarget->GetCounterMaxPosition(pArg, engine); }
+};
+
+class MHSetCounterPosition: public MHActionInt
+{
+public:
+    MHSetCounterPosition(): MHActionInt(":SetCounterPosition")  {}
+    virtual void CallAction(MHEngine *engine, MHRoot *pTarget, int nArg)
+        { pTarget->SetCounterPosition(nArg, engine); }
+};
+
+
+class MHSetSpeed: public MHElemAction
+{
+    typedef MHElemAction base;
+public:
+    MHSetSpeed(): base(":SetSpeed") {}
+    virtual void Initialise(MHParseNode *p, MHEngine *engine) {
+        //printf("SetSpeed Initialise args: "); p->PrintMe(stdout);
+        base::Initialise(p, engine);
+        MHParseNode *pn = p->GetArgN(1);
+        if (pn->m_nNodeType == MHParseNode::PNSeq) pn = pn->GetArgN(0);
+        m_Argument.Initialise(pn, engine);
+    }
+    virtual void Perform(MHEngine *engine) {
+        Target(engine)->SetSpeed(m_Argument.GetValue(engine), engine);
+    }
+protected:
+    virtual void PrintArgs(FILE *fd, int) const { m_Argument.PrintMe(fd, 0); }
+    MHGenericInteger m_Argument;
+};
+
 
 #endif

mythtv/libs/libmythfreemheg/freemheg.h

@@ -22 +22 @@
 #if !defined(FREEMHEG_H)
 #define FREEMHEG_H
 
+#include <QtGlobal>
+#include <QString>
+#include <QByteArray>
 #include <QRegion>
+#include <QRect>
+#include <QSize>
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -32 +37 @@
 class MHBitmapDisplay;
 class MHContext;
 class MHEG;
+class MHStream;
 
 // Called to create a new instance of the module.
 extern MHEG *MHCreateEngine(MHContext *context);
@@ -51 +57 @@
     // Generate a UserAction event i.e. a key press.
     virtual void GenerateUserAction(int nCode) = 0;
     virtual void EngineEvent(int) = 0;
+    virtual void StreamStarted(MHStream*, bool bStarted = true) = 0;
 };
 
 // Logging control
@@ -128 +135 @@
     // the m_stopped condition if we have.
     virtual bool CheckStop(void) = 0;
 
-    // Begin playing audio from the specified stream
-    virtual bool BeginAudio(const QString &stream, int tag) = 0;
+    // Begin playing the specified stream
+    virtual bool BeginStream(const QString &str, MHStream* notify = 0) = 0;
+    // Stop playing stream
+    virtual void EndStream() = 0;
+    // Begin playing audio component
+    virtual bool BeginAudio(int tag) = 0;
     // Stop playing audio
-    virtual void StopAudio(void) = 0;
-    // Begin displaying video from the specified stream
-    virtual bool BeginVideo(const QString &stream, int tag) = 0;
+    virtual void StopAudio() = 0;
+    // Begin displaying video component
+    virtual bool BeginVideo(int tag) = 0;
     // Stop displaying video
-    virtual void StopVideo(void) = 0;
+    virtual void StopVideo() = 0;
+    // Get current stream position in mS, -1 if unknown
+    virtual long GetStreamPos() = 0;
+    // Get current stream size in mS, -1 if unknown
+    virtual long GetStreamMaxPos() = 0;
+    // Set current stream position in mS
+    virtual long SetStreamPos(long) = 0;
+    // Play or pause a stream
+    virtual void StreamPlay(bool play = true) = 0;
 
     // Get the context id strings.
     virtual const char *GetReceiverId(void) = 0;
     virtual const char *GetDSMCCId(void) = 0;
+
+    // InteractionChannel
+    virtual int GetICStatus() = 0; // 0= Active, 1= Inactive, 2= Disabled
 };
 
 // Dynamic Line Art objects record a sequence of drawing actions.

mythtv/libs/libmythtv/libmythtv.pro

@@ -390 +390 @@
         SOURCES += dsmcc.cpp                dsmcccache.cpp
         SOURCES += dsmccbiop.cpp            dsmccobjcarousel.cpp
 
+         # MHEG interaction channel
+        HEADERS += mhegic.h                 netstream.h
+        SOURCES += mhegic.cpp               netstream.cpp
+
         # MHEG/MHI stuff
         HEADERS += interactivetv.h          mhi.h
         SOURCES += interactivetv.cpp        mhi.cpp

new file mythtv/libs/libmythtv/mhegic.cpp

@@ +1 @@
+/* MHEG Interaction Channel
+ * Copyright 2011 Lawrence Rust <lvr at softsystem dot co dot uk>
+ */
+#include "mhegic.h"
+
+// C/C++ lib
+#include <cstdlib>
+using std::getenv;
+
+// Qt
+#include <QByteArray>
+#include <QMutexLocker>
+#include <QNetworkRequest>
+#include <QStringList>
+#include <QScopedPointer>
+#include <QApplication>
+
+// Myth
+#include "netstream.h"
+#include "mythlogging.h"
+
+#define LOC QString("[mhegic] ")
+
+
+MHInteractionChannel::MHInteractionChannel(QObject* parent) : QObject(parent)
+{
+    setObjectName("MHInteractionChannel");
+    moveToThread(&NAMThread::manager());
+}
+
+// virtual
+MHInteractionChannel::~MHInteractionChannel()
+{
+    QMutexLocker locker(&m_mutex);
+    for ( map_t::iterator it = m_pending.begin(); it != m_pending.end(); ++it)
+        (*it)->deleteLater();
+    for ( map_t::iterator it = m_finished.begin(); it != m_finished.end(); ++it)
+        (*it)->deleteLater();
+}
+
+// Get network status
+// static
+MHInteractionChannel::EStatus MHInteractionChannel::status()
+{
+    if (!NetStream::isAvailable())
+    {
+        LOG(VB_MHEG, LOG_INFO, LOC + "WARN network is unavailable");
+        return kInactive;
+    }
+
+    // TODO get this from mythdb
+    QStringList opts = QString(getenv("MYTHMHEG")).split(':');
+    if (opts.contains("noice", Qt::CaseInsensitive))
+        return kDisabled;
+    else if (opts.contains("ice", Qt::CaseInsensitive))
+        return kActive;
+    else // Default
+        return kActive;
+}
+
+static inline bool isCached(const QString& csPath)
+{
+    return NetStream::GetLastModified(csPath).isValid();
+}
+
+// Is a file ready to read?
+bool MHInteractionChannel::CheckFile(const QString& csPath)
+{
+    QMutexLocker locker(&m_mutex);
+
+    // Is it complete?
+    if (m_finished.contains(csPath))
+        return true;
+
+    // Is it pending?
+    if (m_pending.contains(csPath))
+        return false; // It's pending so unavailable
+
+    // Is it in the cache?
+    if (isCached(csPath))
+        return true; // It's cached
+
+    // Queue a request
+    LOG(VB_MHEG, LOG_DEBUG, LOC + QString("CheckFile queue %1").arg(csPath));
+    QScopedPointer< NetStream > p(new NetStream(csPath));
+    if (!p || !p->IsOpen())
+    {
+        LOG(VB_MHEG, LOG_WARNING, LOC + QString("CheckFile failed %1").arg(csPath) );
+        return false;
+    }
+
+    connect(p.data(), SIGNAL(Finished(QObject*)), this, SLOT(slotFinished(QObject*)) );
+    m_pending.insert(csPath, p.take());
+
+    return false; // It's now pending so unavailable
+}
+
+// Read a file. -1= error, 0= OK, 1= not ready
+MHInteractionChannel::EResult
+MHInteractionChannel::GetFile(const QString &csPath, QByteArray &data)
+{
+    QMutexLocker locker(&m_mutex);
+
+    // Is it pending?
+    if (m_pending.contains(csPath))
+        return kPending;
+
+    // Is it complete?
+    QScopedPointer< NetStream > p(m_finished.take(csPath));
+    if (p)
+    {
+        if (p->GetError() == QNetworkReply::NoError)
+        {
+            data = p->ReadAll();
+            LOG(VB_MHEG, LOG_DEBUG, LOC + QString("GetFile finished %1").arg(csPath) );
+            return kSuccess;
+        }
+
+        LOG(VB_MHEG, LOG_WARNING, LOC + QString("GetFile failed %1").arg(csPath) );
+        return kError;
+    }
+
+    // Is it in the cache?
+    if (isCached(csPath))
+    {
+        LOG(VB_MHEG, LOG_DEBUG, LOC + QString("GetFile cache read %1").arg(csPath) );
+
+        NetStream req(csPath, NetStream::kAlwaysCache);
+        if (req.WaitTillFinished(3000) && req.GetError() == QNetworkReply::NoError)
+        {
+            data = req.ReadAll();
+            LOG(VB_MHEG, LOG_DEBUG, LOC + QString("GetFile cache read %1 bytes %2")
+                .arg(data.size()).arg(csPath) );
+            return kSuccess;
+        }
+
+        LOG(VB_MHEG, LOG_WARNING, LOC + QString("GetFile cache read failed %1").arg(csPath) );
+        //return kError;
+        // Retry
+    }
+
+    // Queue a download
+    LOG(VB_MHEG, LOG_DEBUG, LOC + QString("GetFile queue %1").arg(csPath) );
+    p.reset(new NetStream(csPath));
+    if (!p || !p->IsOpen())
+    {
+        LOG(VB_MHEG, LOG_WARNING, LOC + QString("GetFile failed %1").arg(csPath) );
+        return kError;
+    }
+
+    connect(p.data(), SIGNAL(Finished(QObject*)), this, SLOT(slotFinished(QObject*)) );
+    m_pending.insert(csPath, p.take());
+
+    return kPending;
+}
+
+// signal from NetStream
+void MHInteractionChannel::slotFinished(QObject *obj)
+{
+    NetStream* p = dynamic_cast< NetStream* >(obj);
+    if (!p)
+        return;
+
+    QString url = p->Url().toString();
+
+    if (p->GetError() == QNetworkReply::NoError)
+    {
+        LOG(VB_MHEG, LOG_DEBUG, LOC + QString("Finished %1").arg(url) );
+    }
+    else
+    {
+        LOG(VB_MHEG, LOG_WARNING, LOC + QString("Finished %1").arg(p->GetErrorString()) );
+    }
+
+    p->disconnect();
+
+    QMutexLocker locker(&m_mutex);
+
+    m_pending.remove(url);
+    m_finished.insert(url, p);
+}
+
+/* End of file */

new file mythtv/libs/libmythtv/mhegic.h

@@ +1 @@
+/* MHEG Interaction Channel
+ * Copyright 2011 Lawrence Rust <lvr at softsystem dot co dot uk>
+ */
+#ifndef MHEGIC_H
+#define MHEGIC_H
+
+#include <QObject>
+#include <QString>
+#include <QMutex>
+#include <QHash>
+
+class QByteArray;
+class NetStream;
+
+class MHInteractionChannel : public QObject
+{
+    Q_OBJECT
+    Q_DISABLE_COPY(MHInteractionChannel)
+
+public:
+    MHInteractionChannel(QObject* parent = 0);
+    virtual ~MHInteractionChannel();
+
+    // Properties
+public:
+    // Get network status
+    enum EStatus { kActive = 0, kInactive, kDisabled };
+    static EStatus status();
+
+    // Operations
+public:
+    // Is a file ready to read?
+    bool CheckFile(const QString &url);
+    // Read a file
+    enum EResult { kError = -1, kSuccess = 0, kPending };
+    EResult GetFile(const QString &url, QByteArray &data);
+
+    // Implementation
+private slots:
+    // NetStream signals
+    void slotFinished(QObject*);
+
+private:
+    mutable QMutex m_mutex;
+    typedef QHash< QString, NetStream* > map_t;
+    map_t m_pending; // Pending requests
+    map_t m_finished; // Completed requests
+};
+
+#endif /* ndef MHEGIC_H */

mythtv/libs/libmythtv/mhi.cpp

@@ +1 @@
+#include "mhi.h"
+
 #include <unistd.h>
 
 #include <QRegion>
 #include <QBitArray>
 #include <QVector>
+#include <QUrl>
 
-#include "mhi.h"
 #include "interactivescreen.h"
 #include "mythpainter.h"
 #include "mythimage.h"
@@ -358 +360 @@
 // Called by the engine to check for the presence of an object in the carousel.
 bool MHIContext::CheckCarouselObject(QString objectPath)
 {
+    if (objectPath.startsWith("http:") || objectPath.startsWith("https:"))
+    {
+        // TODO verify access to server in carousel file auth.servers
+        // TODO use TLS cert from carousel auth.tls.<x>
+        return m_ic.CheckFile(objectPath);
+    }
+
     QStringList path = objectPath.split(QChar('/'), QString::SkipEmptyParts);
     QByteArray result; // Unused
     int res = m_dsmcc->GetDSMCCObject(path, result);
@@ -367 +376 @@
 // Called by the engine to request data from the carousel.
 bool MHIContext::GetCarouselData(QString objectPath, QByteArray &result)
 {
+    bool const isIC = objectPath.startsWith("http:") || objectPath.startsWith("https:");
+
     // Get the path components.  The string will normally begin with "//"
     // since this is an absolute path but that will be removed by split.
     QStringList path = objectPath.split(QChar('/'), QString::SkipEmptyParts);
@@ -375 +386 @@
     // the result.
 
     QMutexLocker locker(&m_runLock);
+    bool bReported = false;
     QTime t; t.start();
     while (!m_stop)
     {
         locker.unlock();
 
-        int res = m_dsmcc->GetDSMCCObject(path, result);
-        if (res == 0)
-            return true; // Found it
-        else if (res < 0)
-            return false; // Not there.
-        else if (t.elapsed() > 60000) // TODO get this from carousel info
-            return false; // Not there.
+        if (isIC)
+        {
+            // TODO verify access to server in carousel file auth.servers
+            // TODO use TLS cert from carousel file auth.tls.<x>
+            switch (m_ic.GetFile(objectPath, result))
+            {
+            case MHInteractionChannel::kSuccess:
+                if (bReported)
+                    LOG(VB_MHEG, LOG_INFO, QString("[mhi] Received %1").arg(objectPath));
+                return true;
+            case MHInteractionChannel::kError:
+                if (bReported)
+                    LOG(VB_MHEG, LOG_INFO, QString("[mhi] Not found %1").arg(objectPath));
+                return false;
+            case MHInteractionChannel::kPending:
+                break;
+            }
+        }
+        else
+        {
+            int res = m_dsmcc->GetDSMCCObject(path, result);
+            if (res == 0)
+            {
+                if (bReported)
+                    LOG(VB_MHEG, LOG_INFO, QString("[mhi] Received %1").arg(objectPath));
+                return true; // Found it
+            }
+            else if (res < 0)
+            {
+                if (bReported)
+                    LOG(VB_MHEG, LOG_INFO, QString("[mhi] Not found %1").arg(objectPath));
+                return false; // Not there.
+            }
+        }
+
+        if (t.elapsed() > 60000) // TODO get this from carousel info
+             return false; // Not there.
         // Otherwise we block.
-        // Process DSMCC packets then block for a second or until we receive
+        if (!bReported)
+        {
+            bReported = true;
+            LOG(VB_MHEG, LOG_INFO, QString("[mhi] Waiting for %1").arg(objectPath));
+        }
+        // Process DSMCC packets then block for a while or until we receive
         // some more packets.  We should eventually find out if this item is
         // present.
         ProcessDSMCCQueue();
 
         locker.relock();
-        if (!m_stop)
-            m_engine_wait.wait(locker.mutex(), 1000);
+        m_engine_wait.wait(locker.mutex(), 300);
     }
     return false; // Stop has been set.  Say the object isn't present.
 }
 
-// Called from tv_play when a key is pressed.
-// If it is one in the current profile we queue it for the engine
-// and return true otherwise we return false.
-bool MHIContext::OfferKey(QString key)
+// Mapping from key name & UserInput register to UserInput EventData
+class MHKeyLookup
 {
-    int action = 0;
-    QMutexLocker locker(&m_keyLock);
+    typedef QPair< QString, int /*UserInput register*/ > key_t;
+
+public:
+    MHKeyLookup();
+
+    int Find(const QString &name, int reg) const
+        { return m_map.value(key_t(name,reg), 0); }
 
+private:
+    void key(const QString &name, int code, int r1,
+        int r2=0, int r3=0, int r4=0, int r5=0, int r6=0, int r7=0, int r8=0, int r9=0);
+
+    QHash<key_t,int /*EventData*/ > m_map;
+};
+
+void MHKeyLookup::key(const QString &name, int code, int r1,
+    int r2, int r3, int r4, int r5, int r6, int r7, int r8, int r9)
+{
+    m_map.insert(key_t(name,r1), code);
+    if (r2 > 0) 
+        m_map.insert(key_t(name,r2), code);
+    if (r3 > 0) 
+        m_map.insert(key_t(name,r3), code);
+    if (r4 > 0) 
+        m_map.insert(key_t(name,r4), code);
+    if (r5 > 0) 
+        m_map.insert(key_t(name,r5), code);
+    if (r6 > 0) 
+        m_map.insert(key_t(name,r6), code);
+    if (r7 > 0) 
+        m_map.insert(key_t(name,r7), code);
+    if (r8 > 0) 
+        m_map.insert(key_t(name,r8), code);
+    if (r9 > 0) 
+        m_map.insert(key_t(name,r9), code);
+}
+
+MHKeyLookup::MHKeyLookup()
+{
     // This supports the UK and NZ key profile registers.
     // The UK uses 3, 4 and 5 and NZ 13, 14 and 15.  These are
     // similar but the NZ profile also provides an EPG key.
+    // ETSI ES 202 184 V2.2.1 (2011-03) adds group 6 for ICE.
+    // The BBC use group 7 for ICE
+    key(ACTION_UP,           1, 4,5,6,7,14,15);
+    key(ACTION_DOWN,         2, 4,5,6,7,14,15);
+    key(ACTION_LEFT,         3, 4,5,6,7,14,15);
+    key(ACTION_RIGHT,        4, 4,5,6,7,14,15);
+    key(ACTION_0,            5, 4,6,7,14);
+    key(ACTION_1,            6, 4,6,7,14);
+    key(ACTION_2,            7, 4,6,7,14);
+    key(ACTION_3,            8, 4,6,7,14);
+    key(ACTION_4,            9, 4,6,7,14);
+    key(ACTION_5,           10, 4,6,7,14);
+    key(ACTION_6,           11, 4,6,7,14);
+    key(ACTION_7,           12, 4,6,7,14);
+    key(ACTION_8,           13, 4,6,7,14);
+    key(ACTION_9,           14, 4,6,7,14);
+    key(ACTION_SELECT,      15, 4,5,6,7,14,15);
+    key(ACTION_TEXTEXIT,    16, 3,4,5,6,7,13,14,15); // 16= Cancel
+    // 17= help
+    // 18..99 reserved by DAVIC
+    key(ACTION_MENURED,    100, 3,4,5,6,7,13,14,15);
+    key(ACTION_MENUGREEN,  101, 3,4,5,6,7,13,14,15);
+    key(ACTION_MENUYELLOW, 102, 3,4,5,6,7,13,14,15);
+    key(ACTION_MENUBLUE,   103, 3,4,5,6,7,13,14,15);
+    key(ACTION_MENUTEXT,   104, 3,4,5,6,7);
+    key(ACTION_MENUTEXT,   105, 13,14,15); // NB from original Myth code
+    // 105..119 reserved for future spec
+    key(ACTION_STOP,       120, 6,7);
+    key(ACTION_PLAY,       121, 6,7);
+    key(ACTION_PAUSE,      122, 6,7);
+    key(ACTION_JUMPFFWD,   123, 6,7); // 123= Skip Forward
+    key(ACTION_JUMPRWND,   124, 6,7); // 124= Skip Back
+#if 0 // These conflict with left & right
+    key(ACTION_SEEKFFWD,   125, 6,7); // 125= Fast Forward
+    key(ACTION_SEEKRWND,   126, 6,7); // 126= Rewind
+#endif
+    key(ACTION_PLAYBACK,   127, 6,7);
+    // 128..256 reserved for future spec
+    // 257..299 vendor specific
+    key(ACTION_MENUEPG,    300, 13,14,15);
+    // 301.. Vendor specific
+}
 
-    if (key == ACTION_UP)
-    {
-        if (m_keyProfile == 4 || m_keyProfile == 5 ||
-            m_keyProfile == 14 || m_keyProfile == 15)
-            action = 1;
-    }
-    else if (key == ACTION_DOWN)
-    {
-        if (m_keyProfile == 4 || m_keyProfile == 5 ||
-            m_keyProfile == 14 || m_keyProfile == 15)
-            action = 2;
-    }
-    else if (key == ACTION_LEFT)
-    {
-        if (m_keyProfile == 4 || m_keyProfile == 5 ||
-            m_keyProfile == 14 || m_keyProfile == 15)
-            action = 3;
-    }
-    else if (key == ACTION_RIGHT)
-    {
-        if (m_keyProfile == 4 || m_keyProfile == 5 ||
-            m_keyProfile == 14 || m_keyProfile == 15)
-            action = 4;
-    }
-    else if (key == ACTION_0 || key == ACTION_1 || key == ACTION_2 ||
-             key == ACTION_3 || key == ACTION_4 || key == ACTION_5 ||
-             key == ACTION_6 || key == ACTION_7 || key == ACTION_8 ||
-             key == ACTION_9)
-    {
-        if (m_keyProfile == 4 || m_keyProfile == 14)
-            action = key.toInt() + 5;
-    }
-    else if (key == ACTION_SELECT)
-    {
-        if (m_keyProfile == 4 || m_keyProfile == 5 ||
-            m_keyProfile == 14 || m_keyProfile == 15)
-            action = 15;
-    }
-    else if (key == ACTION_TEXTEXIT)
-        action = 16;
-    else if (key == ACTION_MENURED)
-        action = 100;
-    else if (key == ACTION_MENUGREEN)
-        action = 101;
-    else if (key == ACTION_MENUYELLOW)
-        action = 102;
-    else if (key == ACTION_MENUBLUE)
-        action = 103;
-    else if (key == ACTION_MENUTEXT)
-        action = m_keyProfile > 12 ? 105 : 104;
-    else if (key == ACTION_MENUEPG)
-        action = m_keyProfile > 12 ? 300 : 0;
-
-    if (action != 0)
-    {
-        m_keyQueue.enqueue(action);
-        LOG(VB_GENERAL, LOG_INFO, QString("Adding MHEG key %1:%2:%3").arg(key)
-                .arg(action).arg(m_keyQueue.size()));
-        locker.unlock();
-        QMutexLocker locker2(&m_runLock);
-        m_engine_wait.wakeAll();
-        return true;
-    }
-
-    return false;
+// Called from tv_play when a key is pressed.
+// If it is one in the current profile we queue it for the engine
+// and return true otherwise we return false.
+bool MHIContext::OfferKey(QString key)
+{
+    static const MHKeyLookup s_keymap;
+    int action = s_keymap.Find(key, m_keyProfile);
+    if (action == 0)
+        return false;
+ 
+    LOG(VB_GENERAL, LOG_INFO, QString("[mhi] Adding MHEG key %1:%2:%3")
+        .arg(key).arg(action).arg(m_keyQueue.size()) );
+    { QMutexLocker locker(&m_keyLock);
+    m_keyQueue.enqueue(action);}
+    QMutexLocker locker2(&m_runLock);
+    m_engine_wait.wakeAll();
+    return true;
 }
 
 void MHIContext::Reinit(const QRect &display)
@@ -491 +565 @@
 
 void MHIContext::SetInputRegister(int num)
 {
+    LOG(VB_MHEG, LOG_INFO, QString("[mhi] SetInputRegister %1").arg(num));
     QMutexLocker locker(&m_keyLock);
     m_keyQueue.clear();
     m_keyProfile = num;
 }
 
+int MHIContext::GetICStatus()
+{
+   // 0= Active, 1= Inactive, 2= Disabled
+    return m_ic.status();
+}
 
 // Called by the video player to redraw the image.
 void MHIContext::UpdateOSD(InteractiveScreen *osdWindow,
@@ -700 +780 @@
             nResult = query.value(0).toInt();
     }
     else if (str == "rec://svc/cur")
-        nResult = m_currentStream;
+        nResult = m_currentStream > 0 ? m_currentStream : m_currentChannel;
     else if (str == "rec://svc/def")
         nResult = m_currentChannel;
     else if (str.startsWith("rec://"))
@@ -716 +796 @@
 bool MHIContext::GetServiceInfo(int channelId, int &netId, int &origNetId,
                                 int &transportId, int &serviceId)
 {
-    LOG(VB_MHEG, LOG_INFO, QString("[mhi] GetServiceInfo %1").arg(channelId));
     MSqlQuery query(MSqlQuery::InitCon());
     query.prepare("SELECT networkid, transportid, serviceid "
                   "FROM channel, dtv_multiplex "
@@ -729 +808 @@
         origNetId = netId; // We don't have this in the database.
         transportId = query.value(1).toInt();
         serviceId = query.value(2).toInt();
+        LOG(VB_MHEG, LOG_INFO, QString("[mhi] GetServiceInfo %1 => NID=%2 TID=%3 SID=%4")
+            .arg(channelId).arg(netId).arg(transportId).arg(serviceId));
         return true;
     }
-    else return false;
+
+    LOG(VB_MHEG, LOG_WARNING, QString("[mhi] GetServiceInfo %1 failed").arg(channelId));
+    return false;
 }
 
 bool MHIContext::TuneTo(int channel, int tuneinfo)
 {
-    LOG(VB_MHEG, LOG_INFO, QString("[mhi] TuneTo %1 0x%2")
-        .arg(channel).arg(tuneinfo,0,16));
-
     if (!m_isLive)
+    {
+        LOG(VB_MHEG, LOG_WARNING, QString("[mhi] Can't TuneTo %1 0x%2 while not live")
+            .arg(channel).arg(tuneinfo,0,16));
         return false; // Can't tune if this is a recording.
+    }
 
+    LOG(VB_GENERAL, LOG_INFO, QString("[mhi] TuneTo %1 0x%2")
+        .arg(channel).arg(tuneinfo,0,16));
     m_tuneinfo.append(tuneinfo);
 
     // Post an event requesting a channel change.
@@ -754 +840 @@
     return true;
 }
 
-// Begin playing audio from the specified stream
-bool MHIContext::BeginAudio(const QString &stream, int tag)
+
+// Begin playing the specified stream
+bool MHIContext::BeginStream(const QString &stream, MHStream *notify)
 {
-    LOG(VB_MHEG, LOG_INFO, QString("[mhi] BeginAudio %1 %2").arg(stream).arg(tag));
+    LOG(VB_MHEG, LOG_INFO, QString("[mhi] BeginStream %1 0x%2")
+        .arg(stream).arg((quintptr)notify,0,16));
+
+    m_audioTag = -1;
+    m_videoTag = -1;
+    m_notify = notify;
+
+    if (stream.startsWith("http://") || stream.startsWith("https://"))
+    {
+        m_currentStream = -1;
+
+        // The url is sometimes only http:// during stream startup
+        if (QUrl(stream).authority().isEmpty())
+            return false;
+
+        return m_parent->GetNVP()->SetStream(stream);
+    }
 
     int chan = GetChannelIndex(stream);
     if (chan < 0)
         return false;
-
+    if (VERBOSE_LEVEL_CHECK(VB_MHEG, LOG_ANY))
+    {
+        int netId, origNetId, transportId, serviceId;
+        GetServiceInfo(chan, netId, origNetId, transportId, serviceId);
+    }
+ 
     if (chan != m_currentStream)
     {
-        // We have to tune to the channel where the audio is to be found.
+        // We have to tune to the channel where the stream is to be found.
         // Because the audio and video are both components of an MHEG stream
         // they will both be on the same channel.
         m_currentStream = chan;
-        m_audioTag = tag;
         return TuneTo(chan, kTuneKeepChnl|kTuneQuietly|kTuneKeepApp);
     }
+ 
+    return true;
+}
 
-    if (tag < 0)
-        return true; // Leave it at the default.
-    else if (m_parent->GetNVP())
-        return m_parent->GetNVP()->SetAudioByComponentTag(tag);
-    else
+void MHIContext::EndStream()
+{
+    LOG(VB_MHEG, LOG_INFO, QString("[mhi] EndStream 0x%1")
+        .arg((quintptr)m_notify,0,16) );
+
+    m_notify = 0;
+    (void)m_parent->GetNVP()->SetStream(QString());
+}
+
+// Callback from MythPlayer when a stream starts or stops
+bool MHIContext::StreamStarted(bool bStarted)
+{
+    if (!m_engine || !m_notify)
         return false;
+
+    LOG(VB_MHEG, LOG_INFO, QString("[mhi] Stream 0x%1 %2")
+        .arg((quintptr)m_notify,0,16).arg(bStarted ? "started" : "stopped"));
+
+    m_engine->StreamStarted(m_notify, bStarted);
+    if (!bStarted)
+        m_notify = 0;
+    return m_currentStream == -1; // Return true if it's an http stream
 }
 
+// Begin playing audio
+bool MHIContext::BeginAudio(int tag)
+{
+    LOG(VB_MHEG, LOG_INFO, QString("[mhi] BeginAudio %1").arg(tag));
+
+    if (tag < 0)
+        return true; // Leave it at the default.
+
+    m_audioTag = tag;
+    if (m_parent->GetNVP())
+        return m_parent->GetNVP()->SetAudioByComponentTag(tag);
+    return false;
+ }
+ 
 // Stop playing audio
-void MHIContext::StopAudio(void)
+void MHIContext::StopAudio()
 {
     // Do nothing at the moment.
 }
-
+ 
 // Begin displaying video from the specified stream
-bool MHIContext::BeginVideo(const QString &stream, int tag)
+bool MHIContext::BeginVideo(int tag)
 {
-    LOG(VB_MHEG, LOG_INFO, QString("[mhi] BeginVideo %1 %2").arg(stream).arg(tag));
+    LOG(VB_MHEG, LOG_INFO, QString("[mhi] BeginVideo %1").arg(tag));
 
-    int chan = GetChannelIndex(stream);
-    if (chan < 0)
-        return false;
-    if (chan != m_currentStream)
-    {
-        // We have to tune to the channel where the video is to be found.
-        m_currentStream = chan;
-        m_videoTag = tag;
-        return TuneTo(chan, kTuneKeepChnl|kTuneQuietly|kTuneKeepApp);
-    }
     if (tag < 0)
         return true; // Leave it at the default.
-    else if (m_parent->GetNVP())
+ 
+    m_videoTag = tag;
+    if (m_parent->GetNVP())
         return m_parent->GetNVP()->SetVideoByComponentTag(tag);
-
     return false;
 }
-
-// Stop displaying video
-void MHIContext::StopVideo(void)
+ 
+ // Stop displaying video
+void MHIContext::StopVideo()
 {
     // Do nothing at the moment.
 }
+ 
+// Get current stream position, -1 if unknown
+long MHIContext::GetStreamPos()
+{
+    return m_parent->GetNVP() ? m_parent->GetNVP()->GetStreamPos() : -1;
+}
+
+// Get current stream size, -1 if unknown
+long MHIContext::GetStreamMaxPos()
+{
+    return m_parent->GetNVP() ? m_parent->GetNVP()->GetStreamMaxPos() : -1;
+}
+
+// Set current stream position
+long MHIContext::SetStreamPos(long pos)
+{
+    return m_parent->GetNVP() ? m_parent->GetNVP()->SetStreamPos(pos) : -1;
+}
+
+// Play or pause a stream
+void MHIContext::StreamPlay(bool play)
+{
+    if (m_parent->GetNVP())
+        m_parent->GetNVP()->StreamPlay(play);
+}
 
 // Create a new object to draw dynamic line art.
 MHDLADisplay *MHIContext::CreateDynamicLineArt(
@@ -866 +1022 @@
 // and usually that will be the same as the origin of the bounding
 // box (clipRect).
 void MHIContext::DrawImage(int x, int y, const QRect &clipRect,
-                           const QImage &qImage)
+                           const QImage &qImage, bool bScaled /* = false */)
 {
     if (qImage.isNull())
         return;
 
     QRect imageRect(x, y, qImage.width(), qImage.height());
-    QRect displayRect = QRect(clipRect.x(), clipRect.y(),
-                              clipRect.width(), clipRect.height()) & imageRect;
+    QRect displayRect = clipRect & imageRect;
 
-    if (displayRect == imageRect) // No clipping required
+    if (bScaled || displayRect == imageRect) // No clipping required
     {
         QImage q_scaled =
             qImage.scaled(
@@ -889 +1044 @@
     else if (!displayRect.isEmpty())
     { // We must clip the image.
         QImage clipped = qImage.convertToFormat(QImage::Format_ARGB32)
-            .copy(displayRect.x() - x, displayRect.y() - y,
-                  displayRect.width(), displayRect.height());
+            .copy(displayRect.translated(-x, -y));
         QImage q_scaled =
             clipped.scaled(
                 SCALED_X(displayRect.width()),
@@ -1470 +1624 @@
                 tiledImage.setPixel(i, j, m_image.pixel(i % m_image.width(), j % m_image.height()));
             }
         }
-        m_parent->DrawImage(rect.x(), rect.y(), rect, tiledImage);
+        m_parent->DrawImage(rect.x(), rect.y(), rect, tiledImage, true);
     }
     else
     {
-        m_parent->DrawImage(x, y, rect, m_image);
+        // NB THe BBC expects bitmaps to be scaled, not clipped
+        m_parent->DrawImage(x, y, rect, m_image, true);
     }
 }
 

mythtv/libs/libmythtv/mhi.h

@@ -21 +21 @@
 #include "../libmythfreemheg/freemheg.h"
 #include "interactivetv.h"
 #include "dsmcc.h"
+#include "mhegic.h"
 #include "mythcontext.h"
 #include "mythdbcon.h"
 #include "mythdeque.h"
@@ -99 +100 @@
     virtual void DrawBackground(const QRegion &reg);
     virtual void DrawVideo(const QRect &videoRect, const QRect &displayRect);
 
-    void DrawImage(int x, int y, const QRect &rect, const QImage &image);
+    void DrawImage(int x, int y, const QRect &rect, const QImage &image, bool bScaled = false);
 
     virtual int GetChannelIndex(const QString &str);
     /// Get netId etc from the channel index.
@@ -107 +108 @@
                                 int &transportId, int &serviceId);
     virtual bool TuneTo(int channel, int tuneinfo);
 
-    /// Begin playing audio from the specified stream
-    virtual bool BeginAudio(const QString &stream, int tag);
+    /// Begin playing the specified stream
+    virtual bool BeginStream(const QString &str, MHStream* notify);
+    virtual void EndStream();
+    // Called when the stream starts or stops
+    bool StreamStarted(bool bStarted = true);
+    /// Begin playing audio
+    virtual bool BeginAudio(int tag);
     /// Stop playing audio
-    virtual void StopAudio(void);
-    /// Begin displaying video from the specified stream
-    virtual bool BeginVideo(const QString &stream, int tag);
+    virtual void StopAudio();
+    /// Begin displaying video
+    virtual bool BeginVideo(int tag);
     /// Stop displaying video
-    virtual void StopVideo(void);
+    virtual void StopVideo();
+    // Get current stream position, -1 if unknown
+    virtual long GetStreamPos();
+    // Get current stream size, -1 if unknown
+    virtual long GetStreamMaxPos();
+    // Set current stream position
+    virtual long SetStreamPos(long);
+    // Play or pause a stream
+    virtual void StreamPlay(bool);
 
     // Get the context id strings.  The format of these strings is specified
     // by the UK MHEG profile.
@@ -123 +137 @@
     virtual const char *GetDSMCCId(void)
         { return "DSMMYT001"; } // DSMCC version.
 
+    // InteractionChannel
+    virtual int GetICStatus(); // 0= Active, 1= Inactive, 2= Disabled
+
     // Operations used by the display classes
     // Add an item to the display vector
     void AddToDisplay(const QImage &image, int x, int y);
@@ -150 +167 @@
     QMutex           m_dsmccLock;
     MythDeque<DSMCCPacket*> m_dsmccQueue;
 
+    MHInteractionChannel m_ic;  // Interaction channel
+    MHStream        *m_notify;
+
     QMutex           m_keyLock;
     MythDeque<int>   m_keyQueue;
     int              m_keyProfile;

new file mythtv/libs/libmythtv/netstream.cpp

@@ +1 @@
+/* Network stream
+ * Copyright 2011 Lawrence Rust <lvr at softsystem dot co dot uk>
+ */
+#include "netstream.h"
+
+// C/C++ lib
+#include <cstdlib>
+using std::getenv;
+#include <cstddef>
+
+// Qt
+#include <QNetworkAccessManager>
+#include <QNetworkRequest>
+#include <QNetworkReply>
+#include <QNetworkProxy>
+#include <QNetworkDiskCache>
+#include <QSslConfiguration>
+#include <QSslError>
+#include <QSslSocket>
+#include <QUrl>
+#include <QThread>
+#include <QMutexLocker>
+#include <QEvent>
+#include <QCoreApplication>
+#include <QAtomicInt>
+#include <QMetaType> // qRegisterMetaType
+#include <QDesktopServices>
+#include <QScopedPointer>
+
+// Myth
+#include "mythlogging.h"
+#include "mythcorecontext.h"
+#include "mythdirs.h"
+
+
+/*
+ * Constants
+ */
+#define LOC "[netstream] "
+
+
+/*
+ * Private data
+ */
+static QAtomicInt s_nRequest(1); // Unique NetStream request ID
+static QMutex s_mtx; // Guard local static data e.g. NAMThread singleton
+
+
+/*
+ * Private types
+ */
+// Custom event posted to NAMThread
+class NetStreamEvent : public QEvent
+{
+public:
+    NetStreamEvent(int id, const QNetworkRequest &req) :
+        QEvent(QEvent::User),
+        m_id(id),
+        m_req(req),
+        m_bCancelled(false)
+    { }
+
+    const int m_id;
+    const QNetworkRequest m_req;
+    volatile bool m_bCancelled;
+};
+
+
+/**
+ * Network streaming request
+ */
+NetStream::NetStream(const QUrl &url, EMode mode /*= kPreferCache*/) :
+    m_id(s_nRequest.fetchAndAddRelaxed(1)),
+    m_state(kClosed),
+    m_event(0),
+    m_reply(0),
+    m_nRedirections(0)
+{
+    setObjectName("NetStream " + url.toString());
+
+    m_request.setAttribute(QNetworkRequest::CacheLoadControlAttribute,
+        mode == kAlwaysCache ? QNetworkRequest::AlwaysCache :
+        mode == kPreferCache ? QNetworkRequest::PreferCache :
+        mode == kNeverCache ? QNetworkRequest::AlwaysNetwork :
+            QNetworkRequest::PreferNetwork );
+
+    // Receive requestStarted signals from NAMThread when it processes a NetStreamEvent
+    connect(&NAMThread::manager(), SIGNAL(requestStarted(int, QNetworkReply*)),
+        this, SLOT(slotRequestStarted(int, QNetworkReply*)), Qt::DirectConnection );
+
+    QMutexLocker locker(&m_mutex);
+
+    if (Request(url))
+        m_state = kPending;
+}
+
+// virtual
+NetStream::~NetStream()
+{
+    Abort();
+
+    QMutexLocker locker(&m_mutex);
+
+    if (m_reply)
+    {
+        m_reply->disconnect();
+        m_reply->deleteLater();
+        m_reply = 0;
+    }
+}
+
+static inline QString Source(const QNetworkRequest &request)
+{
+    switch (request.attribute(QNetworkRequest::CacheLoadControlAttribute).toInt())
+    {
+    case QNetworkRequest::AlwaysCache: return "cache";
+    case QNetworkRequest::PreferCache: return "cache-preferred";
+    case QNetworkRequest::PreferNetwork: return "net-preferred";
+    case QNetworkRequest::AlwaysNetwork: return "net";
+    }
+    return "unknown";
+}
+
+static inline QString Source(QNetworkReply* reply)
+{
+    return reply->attribute(QNetworkRequest::SourceIsFromCacheAttribute).toBool() ?
+        "cache" : "host";
+}
+
+// Send request to the network manager
+// Caller must hold m_mutex
+bool NetStream::Request(const QUrl& url)
+{
+    if (!IsSupported(url))
+    {
+        LOG(VB_GENERAL, LOG_WARNING, LOC +
+            QString("(%1) Request unsupported URL: %2")
+            .arg(m_id).arg(url.toString()) );
+        return false;
+    }
+
+    if (m_event)
+    {
+        LOG(VB_GENERAL, LOG_ERR, LOC +
+            QString("(%1) Can't Request while pending").arg(m_id) );
+        return false;
+    }
+
+    if (m_reply)
+    {
+        m_reply->disconnect();
+        m_reply->deleteLater();
+        m_reply = 0;
+    }
+
+    m_request.setUrl(url);
+
+    const QByteArray ua("User-Agent");
+    if (!m_request.hasRawHeader(ua))
+        m_request.setRawHeader(ua, "UK-MHEG/2 MYT001/001 MHGGNU/001");
+
+#ifndef QT_NO_OPENSSL
+#if 1 // The BBC use a self certified cert so don't verify it
+    if (m_request.url().scheme() == "https")
+    {
+        // TODO use cert from carousel auth.tls.<x>
+        QSslConfiguration ssl(QSslConfiguration::defaultConfiguration());
+        ssl.setPeerVerifyMode(QSslSocket::VerifyNone);
+        m_request.setSslConfiguration(ssl);
+    }
+#endif
+#endif
+
+    LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) Requesting %2 from %3")
+        .arg(m_id).arg(m_request.url().toString()).arg(Source(m_request)) );
+    m_event = new NetStreamEvent(m_id, m_request);
+    NAMThread::PostEvent(m_event);
+    return true;
+}
+
+// signal from NAMThread manager that a request has been started
+void NetStream::slotRequestStarted(int id, QNetworkReply *reply)
+{
+    QMutexLocker locker(&m_mutex);
+
+    if (m_id != id)
+        return;
+
+    m_event = 0; // Event is no longer valid
+
+    if (!m_reply)
+    {
+        LOG(VB_FILE, LOG_DEBUG, LOC + QString("(%1) Started").arg(m_id) );
+
+        m_reply = reply;
+        m_state = kStarted;
+
+        reply->setReadBufferSize(4*1024*1024L); // 0= unlimited, 1MB => 4secs @ 1.5Mbps
+
+        // NB The following signals must be Qt::DirectConnection 'cos this slot
+        // was connected Qt::DirectConnection so the current thread is NAMThread
+
+        // QNetworkReply signals
+        connect(reply, SIGNAL(finished()), this, SLOT(slotFinished()), Qt::DirectConnection );
+#ifndef QT_NO_OPENSSL
+        connect(reply, SIGNAL(sslErrors(const QList<QSslError> &)), this,
+            SLOT(slotSslErrors(const QList<QSslError> &)), Qt::DirectConnection );
+#endif
+        // QIODevice signals
+        connect(reply, SIGNAL(readyRead()), this, SLOT(slotReadyRead()), Qt::DirectConnection );
+    }
+    else
+        LOG(VB_GENERAL, LOG_ERR, LOC +
+            QString("(%1) Started but m_reply not NULL").arg(m_id));
+}
+
+// signal from QNetworkReply
+void NetStream::slotReadyRead()
+{
+    QMutexLocker locker(&m_mutex);
+
+    if (m_reply)
+    {
+        LOG(VB_FILE, LOG_DEBUG, LOC + QString("(%1) Ready %2 bytes")
+            .arg(m_id).arg(m_reply->bytesAvailable()) );
+        if (m_state < kReady)
+            m_state = kReady;
+
+        locker.unlock();
+        emit ReadyRead(this);
+        locker.relock();
+
+        m_ready.wakeAll();
+    }
+    else
+        LOG(VB_GENERAL, LOG_ERR, LOC +
+            QString("(%1) ReadyRead but m_reply = NULL").arg(m_id));
+}
+
+// signal from QNetworkReply
+void NetStream::slotFinished()
+{
+    QMutexLocker locker(&m_mutex);
+
+    if (m_reply)
+    {
+        QNetworkReply::NetworkError error = m_reply->error();
+        if (QNetworkReply::NoError == error)
+        {
+            // Check for a re-direct
+            QUrl url = m_reply->attribute(
+                QNetworkRequest::RedirectionTargetAttribute).toUrl();
+            if (!url.isValid())
+            {
+                m_state = kFinished;
+            }
+            else if (m_nRedirections++ > 0)
+            {
+                LOG(VB_FILE, LOG_WARNING, LOC + QString("(%1) Too many redirections")
+                    .arg(m_id));
+                m_state = kFinished;
+            }
+            else if ((url = m_request.url().resolved(url)) == m_request.url())
+            {
+                LOG(VB_FILE, LOG_WARNING, LOC + QString("(%1) Redirection loop to %2")
+                    .arg(m_id).arg(url.toString()) );
+                m_state = kFinished;
+            }
+            else
+            {
+                LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) Redirecting").arg(m_id));
+                m_state = Request(url) ? kPending : kFinished;
+            }
+        }
+        else
+        {
+            LOG(VB_FILE, LOG_WARNING, LOC + QString("(%1) Error: %2")
+                .arg(m_id).arg(m_reply->errorString()) );
+            m_state = kFinished;
+        }
+
+        if (m_state == kFinished)
+        {
+            LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) Finished %2 bytes from %3")
+                .arg(m_id).arg(ContentLength()).arg(Source(m_reply)) );
+
+            locker.unlock();
+            emit Finished(this);
+            locker.relock();
+
+            m_finished.wakeAll();
+        }
+    }
+    else
+        LOG(VB_GENERAL, LOG_ERR, LOC + QString("(%1) Finished but m_reply = NULL")
+            .arg(m_id));
+}
+
+#ifndef QT_NO_OPENSSL
+// signal from QNetworkReply
+void NetStream::slotSslErrors(const QList<QSslError> &errors)
+{
+    QMutexLocker locker(&m_mutex);
+
+    if (m_reply)
+    {
+        bool bIgnore = true;
+        Q_FOREACH(const QSslError &e, errors)
+        {
+            LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) SSL error %2: ")
+                .arg(m_id).arg(e.error()) + e.errorString() );
+            switch (e.error())
+            {
+#if 1 // The BBC use a self certified cert
+            case QSslError::SelfSignedCertificateInChain:
+                break;
+#endif
+            default:
+                bIgnore = false;
+                break;
+            }
+        }
+
+        if (bIgnore)
+        {
+            LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) SSL errors ignored").arg(m_id));
+            m_reply->ignoreSslErrors(errors);
+        }
+    }
+    else
+        LOG(VB_GENERAL, LOG_ERR, LOC +
+            QString("(%1) SSL error but m_reply = NULL").arg(m_id) );
+}
+#endif
+
+
+/**
+ * RingBuffer interface
+ */
+// static
+bool NetStream::IsSupported(const QUrl &url)
+{
+    return url.isValid() &&
+        (url.scheme() == "http" || url.scheme() == "https") &&
+        !url.authority().isEmpty() &&
+        !url.path().isEmpty();
+}
+
+bool NetStream::IsOpen() const
+{
+    QMutexLocker locker(&m_mutex);
+    return m_state > kClosed;
+}
+
+void NetStream::Abort()
+{
+    QMutexLocker locker(&m_mutex);
+
+    if (m_event)
+    {
+        LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) Cancelled").arg(m_id) );
+        m_event->m_bCancelled = true;
+        m_event = 0;
+    }
+
+    if (m_reply && m_reply->isRunning())
+    {
+        LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) Abort").arg(m_id) );
+        locker.unlock();
+        m_reply->abort();
+        locker.relock();
+    }
+
+    m_state = kFinished;
+}
+
+int NetStream::safe_read(void *data, unsigned sz, unsigned millisecs /* = 0 */)
+{
+    QTime t; t.start();
+    QMutexLocker locker(&m_mutex);
+
+    if (!m_reply)
+        return -1;
+
+    qint64 avail;
+    while ((avail = m_reply->bytesAvailable()) < sz && m_state < kFinished)
+    {
+        unsigned elapsed = t.elapsed();
+        if (elapsed >= millisecs)
+            break;
+        m_ready.wait(&m_mutex, millisecs - elapsed);
+    }
+
+    avail = m_reply->read(reinterpret_cast< char* >(data), sz);
+    if (avail <= 0)
+        return m_state >= kFinished ? 0 : -1; // 0= EOF
+
+    return (int)avail;
+}
+
+qlonglong NetStream::Seek(qlonglong pos)
+{
+    LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) Seek %2").arg(m_id).arg(pos) );
+
+    QMutexLocker locker(&m_mutex);
+
+    if (!m_reply)
+        return -1;
+
+    if (!m_reply->seek(pos))
+    {
+        LOG(VB_FILE, LOG_WARNING, LOC + QString("(%1) Seek %2 failed")
+            .arg(m_id).arg(pos) );
+        return -1;
+    }
+
+    return pos;
+}
+
+qlonglong NetStream::GetReadPosition() const
+{
+    QMutexLocker locker(&m_mutex);
+
+    if (!m_reply)
+        return -1;
+
+    return m_reply->pos();
+}
+
+// Caller must hold m_mutex
+qlonglong NetStream::ContentLength() const
+{
+    if (!m_reply)
+        return -1;
+
+    bool ok;
+    qlonglong len = m_reply->header(QNetworkRequest::ContentLengthHeader)
+        .toLongLong(&ok);
+    return ok ? len : m_reply->bytesAvailable();
+}
+
+qlonglong NetStream::GetSize() const
+{
+    QMutexLocker locker(&m_mutex);
+    return ContentLength();
+}
+
+/**
+ * Synchronous interface
+ */
+bool NetStream::WaitTillReady(unsigned long time)
+{
+    QMutexLocker locker(&m_mutex);
+
+    QTime t; t.start();
+    while (m_state < kReady)
+    {
+        unsigned elapsed = t.elapsed();
+        if (elapsed > time)
+            return false;
+
+        m_ready.wait(&m_mutex, time - elapsed);
+    }
+
+    return true;
+}
+
+bool NetStream::WaitTillFinished(unsigned long time)
+{
+    QMutexLocker locker(&m_mutex);
+
+    QTime t; t.start();
+    while (m_state < kFinished)
+    {
+        unsigned elapsed = t.elapsed();
+        if (elapsed > time)
+            return false;
+
+        m_finished.wait(&m_mutex, time - elapsed);
+    }
+
+    return true;
+}
+
+QNetworkReply::NetworkError NetStream::GetError() const
+{
+    QMutexLocker locker(&m_mutex);
+    return !m_reply ? QNetworkReply::OperationCanceledError : m_reply->error();
+}
+
+QString NetStream::GetErrorString() const
+{
+    QMutexLocker locker(&m_mutex);
+    return !m_reply ? "Operation cancelled" : m_reply->errorString();
+}
+
+qlonglong NetStream::BytesAvailable() const
+{
+    QMutexLocker locker(&m_mutex);
+    return m_reply ? m_reply->bytesAvailable() : 0;
+}
+
+QByteArray NetStream::ReadAll()
+{
+    QMutexLocker locker(&m_mutex);
+    return m_reply ? m_reply->readAll() : QByteArray();
+}
+
+/**
+ * Asynchronous interface
+ */
+bool NetStream::isStarted() const
+{
+    QMutexLocker locker(&m_mutex);
+    return m_state >= kStarted;
+}
+
+bool NetStream::isReady() const
+{
+    QMutexLocker locker(&m_mutex);
+    return m_state >= kReady;
+}
+
+bool NetStream::isFinished() const
+{
+    QMutexLocker locker(&m_mutex);
+    return m_state >= kFinished;
+}
+
+/**
+ * Public helpers
+ */
+// static
+bool NetStream::isAvailable()
+{
+    return NAMThread::isAvailable();
+}
+
+// Time when URI was last written to cache or invalid if not cached.
+// static
+QDateTime NetStream::GetLastModified(const QString &url)
+{
+    return NAMThread::GetLastModified(url);
+}
+
+
+/**
+ * NetworkAccessManager event loop thread
+ */
+//static
+NAMThread & NAMThread::manager()
+{
+    QMutexLocker locker(&s_mtx);
+
+    // Singleton
+    static NAMThread thread;
+    thread.start();
+    return thread;
+}
+
+NAMThread::NAMThread() : m_bQuit(false), m_nam(0)
+{
+    setObjectName("NAMThread");
+
+#ifndef QT_NO_OPENSSL
+    // This ought to be done by the Qt lib but isn't in 4.7
+    //Q_DECLARE_METATYPE(QList<QSslError>)
+    qRegisterMetaType< QList<QSslError> >();
+#endif
+}
+
+// virtual
+NAMThread::~NAMThread()
+{
+    QMutexLocker locker(&m_mutex);
+    delete m_nam;
+}
+
+// virtual
+void NAMThread::run()
+{
+    LOG(VB_MHEG, LOG_INFO, LOC "NAMThread starting");
+
+    m_nam = new QNetworkAccessManager();
+    m_nam->setObjectName("NetStream NAM");
+
+    // Setup cache
+    QScopedPointer<QNetworkDiskCache> cache(new QNetworkDiskCache());
+    cache->setCacheDirectory(
+        QDesktopServices::storageLocation(QDesktopServices::CacheLocation) );
+    m_nam->setCache(cache.take());
+
+    // Setup a network proxy e.g. for TOR: socks://localhost:9050
+    // TODO get this from mythdb
+    QString proxy(getenv("MYTHMHEG_PROXY"));
+    if (!proxy.isEmpty())
+    {
+        QUrl url(proxy, QUrl::TolerantMode);
+        QNetworkProxy::ProxyType type =
+            url.scheme().isEmpty() ? QNetworkProxy::HttpProxy :
+            url.scheme() == "socks" ? QNetworkProxy::Socks5Proxy :
+            url.scheme() == "http" ? QNetworkProxy::HttpProxy :
+            url.scheme() == "https" ? QNetworkProxy::HttpProxy :
+            url.scheme() == "cache" ? QNetworkProxy::HttpCachingProxy :
+            url.scheme() == "ftp" ? QNetworkProxy::FtpCachingProxy :
+            QNetworkProxy::NoProxy;
+        if (QNetworkProxy::NoProxy != type)
+        {
+            LOG(VB_MHEG, LOG_INFO, LOC "Using proxy: " + proxy);
+            m_nam->setProxy(QNetworkProxy(
+                type, url.host(), url.port(), url.userName(), url.password() ));
+        }
+        else
+        {
+            LOG(VB_MHEG, LOG_ERR, LOC + QString("Unknown proxy type %1")
+                .arg(url.scheme()) );
+        }
+    }
+
+    // Quit when main app quits
+    connect(QCoreApplication::instance(), SIGNAL(aboutToQuit()), this, SLOT(quit()) );
+
+    m_running.release();
+
+    while(!m_bQuit)
+    {
+        // Process NAM events
+        QCoreApplication::processEvents();
+
+        QMutexLocker locker(&m_mutex);
+        m_work.wait(&m_mutex, 100);
+        while (!m_workQ.isEmpty())
+        {
+            QScopedPointer< QEvent > ev(m_workQ.dequeue());
+            locker.unlock();
+            NewRequest(ev.data());
+        }
+    }
+
+    m_running.acquire();
+
+    delete m_nam;
+    m_nam = 0;
+
+    LOG(VB_MHEG, LOG_INFO, LOC "NAMThread stopped");
+}
+
+// slot
+void NAMThread::quit()
+{
+    m_bQuit = true;
+    QThread::quit();
+}
+
+// static
+void NAMThread::PostEvent(QEvent *event)
+{
+    NAMThread &m = manager();
+    QMutexLocker locker(&m.m_mutex);
+    m.m_workQ.enqueue(event);
+}
+
+bool NAMThread::NewRequest(QEvent *event)
+{
+    NetStreamEvent *p = dynamic_cast< NetStreamEvent* >(event);
+    if (!p)
+    {
+        LOG(VB_GENERAL, LOG_ERR, LOC "Invalid NetStreamEvent");
+        return false;
+    }
+
+    if (!p->m_bCancelled)
+    {
+        LOG(VB_FILE, LOG_DEBUG, LOC "get " + p->m_id );
+        QNetworkReply *reply = m_nam->get(p->m_req);
+        emit requestStarted(p->m_id, reply);
+    }
+    else
+        LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) NetStreamEvent cancelled").arg(p->m_id) );
+    return true;
+}
+
+// static
+bool NAMThread::isAvailable()
+{
+    NAMThread &m = manager();
+
+    if (!m.m_running.tryAcquire(1, 3000))
+        return false;
+
+    m.m_running.release();
+
+    QMutexLocker locker(&m.m_mutex);
+
+    if (!m.m_nam)
+        return false;
+
+    switch (m.m_nam->networkAccessible())
+    {
+    case QNetworkAccessManager::Accessible: return true;
+    case QNetworkAccessManager::NotAccessible: return false;
+    case QNetworkAccessManager::UnknownAccessibility: return true;
+    }
+    return false;
+}
+
+// Time when URI was last written to cache or invalid if not cached.
+// static
+QDateTime NAMThread::GetLastModified(const QString &url)
+{
+    NAMThread &m = manager();
+
+    QMutexLocker locker(&m.m_mutex);
+
+    if (!m.m_nam)
+        return QDateTime(); // Invalid
+
+    QAbstractNetworkCache *cache = m.m_nam->cache();
+    if (!cache)
+        return QDateTime(); // Invalid
+
+    QNetworkCacheMetaData meta = cache->metaData(QUrl(url));
+    if (!meta.isValid())
+    {
+        LOG(VB_FILE, LOG_DEBUG, LOC + QString("GetLastModified('%1') not in cache")
+            .arg(url));
+        return QDateTime(); // Invalid
+    }
+
+    // Check if expired
+    QDateTime const now(QDateTime::currentDateTime()); // local time
+    QDateTime expire = meta.expirationDate();
+    if (expire.isValid() && expire.toLocalTime() < now)
+    {
+        LOG(VB_FILE, LOG_INFO, LOC + QString("GetLastModified('%1') past expiration %2")
+            .arg(url).arg(expire.toString()));
+        return QDateTime(); // Invalid
+    }
+
+    // Get time URI was modified (Last-Modified header)  NB this may be invalid
+    QDateTime lastMod = meta.lastModified();
+
+    QNetworkCacheMetaData::RawHeaderList headers = meta.rawHeaders();
+    Q_FOREACH(const QNetworkCacheMetaData::RawHeader &h, headers)
+    {
+        // RFC 1123 date format: Thu, 01 Dec 1994 16:00:00 GMT
+        static const char kszFormat[] = "ddd, dd MMM yyyy HH:mm:ss 'GMT'";
+
+        QString const first(h.first.toLower());
+        if (first == "cache-control")
+        {
+            QString const second(h.second.toLower());
+            if (second == "no-cache" || second == "no-store")
+            {
+                LOG(VB_FILE, LOG_INFO, LOC +
+                    QString("GetLastModified('%1') Cache-Control disabled").arg(url));
+                cache->remove(QUrl(url));
+                return QDateTime(); // Invalid
+            }
+        }
+        else if (first == "date")
+        {
+            QDateTime d = QDateTime::fromString(h.second, kszFormat);
+            if (!d.isValid())
+            {
+                LOG(VB_GENERAL, LOG_WARNING, LOC +
+                    QString("GetLastModified invalid Date header '%1'")
+                    .arg(h.second.constData()));
+                continue;
+            }
+            d.setTimeSpec(Qt::UTC);
+            lastMod = d;
+        }
+    }
+
+    LOG(VB_FILE, LOG_DEBUG, LOC + QString("GetLastModified('%1') last modified %2")
+        .arg(url).arg(lastMod.toString()));
+    return lastMod;
+}
+
+/* End of file */

new file mythtv/libs/libmythtv/netstream.h

@@ +1 @@
+/* Network stream
+ * Copyright 2011 Lawrence Rust <lvr at softsystem dot co dot uk>
+ */
+#ifndef NETSTREAM_H
+#define NETSTREAM_H
+
+#include <QList>
+#include <QString>
+#include <QByteArray>
+#include <QObject>
+#include <QMutex>
+#include <QSemaphore>
+#include <QThread>
+#include <QNetworkRequest>
+#include <QNetworkReply>
+#include <QSslError>
+#include <QWaitCondition>
+#include <QQueue>
+#include <QDateTime>
+
+class QUrl;
+class QNetworkAccessManager;
+class NetStreamEvent;
+
+
+/**
+ * Stream content from a URI
+ */
+class NetStream : public QObject
+{
+    Q_OBJECT
+    Q_DISABLE_COPY(NetStream)
+
+public:
+    enum EMode { kNeverCache, kPreferCache, kAlwaysCache };
+    NetStream(const QUrl &, EMode mode = kPreferCache);
+    virtual ~NetStream();
+
+public:
+    // RingBuffer interface
+    static bool IsSupported(const QUrl &);
+    bool IsOpen() const;
+    void Abort();
+    int safe_read(void *data, unsigned size, unsigned millisecs = 0);
+    qlonglong Seek(qlonglong);
+    qlonglong GetReadPosition() const;
+    qlonglong GetSize() const;
+
+    // Properties
+    QUrl Url() const { return m_request.url(); }
+
+    // Synchronous interface
+    bool WaitTillReady(unsigned long millisecs);
+    bool WaitTillFinished(unsigned long millisecs);
+    QNetworkReply::NetworkError GetError() const;
+    QString GetErrorString() const;
+    qlonglong BytesAvailable() const;
+    QByteArray ReadAll();
+
+    // Async interface
+    bool isStarted() const;
+    bool isReady() const;
+    bool isFinished() const;
+
+signals:
+    void ReadyRead(QObject*);
+    void Finished(QObject*);
+
+public:
+    // Time when a URI was last written to cache or invalid if not cached.
+    static QDateTime GetLastModified(const QString &url);
+    // Is the network accessible
+    static bool isAvailable();
+
+    // Implementation
+private slots:
+    // NAMThread signals
+    void slotRequestStarted(int, QNetworkReply *);
+    // QNetworkReply signals
+    void slotFinished();
+#ifndef QT_NO_OPENSSL
+    void slotSslErrors(const QList<QSslError> & errors);
+#endif
+    // QIODevice signals
+    void slotReadyRead();
+
+private:
+    bool Request(const QUrl &);
+    qlonglong ContentLength() const;
+
+    const int m_id; // Unique request ID
+
+    mutable QMutex m_mutex; // Protects r/w access to the following data
+    QNetworkRequest m_request;
+    enum { kClosed, kPending, kStarted, kReady, kFinished } m_state;
+    NetStreamEvent* m_event;
+    QNetworkReply* m_reply;
+    int m_nRedirections;
+    QWaitCondition m_ready;
+    QWaitCondition m_finished;
+};
+
+
+/**
+ * Thread to process NetStream requests
+ */
+class NAMThread : public QThread
+{
+    Q_OBJECT
+    Q_DISABLE_COPY(NAMThread)
+
+    // Use manager() to create
+    NAMThread();
+
+public:
+    static NAMThread & manager(); // Singleton
+    virtual ~NAMThread();
+
+    static void PostEvent(QEvent *);
+
+    static bool isAvailable(); // is network usable
+    static QDateTime GetLastModified(const QString &url);
+
+signals:
+     void requestStarted(int, QNetworkReply *);
+
+    // Implementation
+protected:
+    virtual void run(); // QThread override
+    bool NewRequest(QEvent *);
+
+private slots:
+    void quit();
+
+private:
+    volatile bool m_bQuit;
+    QSemaphore m_running;
+    mutable QMutex m_mutex; // Protects r/w access to the following data
+    QNetworkAccessManager *m_nam;
+    QQueue< QEvent * > m_workQ;
+    QWaitCondition m_work;
+};
+
+#endif /* ndef NETSTREAM_H */