Live TV must be switched in VDR main thread (fixes #568).

HISTORY

@@ -1,6 +1,7 @@
 VDR Plugin 'streamdev' Revision History
 ---------------------------------------
  
+- live TV must be switched in VDR main thread
 - return value of streamdev-clients cDevice::NumProvidedSystems() now
   configurable in plugin setup
 

server/connection.c

@@ -8,11 +8,60 @@
 #include "common.h"
 
 #include <vdr/tools.h>
+#include <vdr/thread.h>
 #include <vdr/transfer.h>
 #include <string.h>
 #include <stdarg.h>
 #include <errno.h>
 
+class cSwitchLive {
+private:
+	cMutex         mutex;
+	cCondWait      switched;
+	cDevice        *device;
+	const cChannel *channel;
+public:
+	cDevice* Switch(cDevice *Device, const cChannel *Channel);
+	void Switch(void);
+	cSwitchLive(void);
+};
+
+cSwitchLive::cSwitchLive(): device(NULL), channel(NULL)
+{
+}
+
+cDevice* cSwitchLive::Switch(cDevice *Device, const cChannel *Channel)
+{
+	mutex.Lock();
+	device = Device;
+	channel = Channel;
+	mutex.Unlock();
+	switched.Wait();
+	return device;
+}
+
+void cSwitchLive::Switch(void)
+{
+	mutex.Lock();
+	if (channel && device) {
+		cDevice::SetAvoidDevice(device);
+		if (!Channels.SwitchTo(cDevice::CurrentChannel())) {
+			if (StreamdevServerSetup.SuspendMode == smAlways) {
+				Channels.SwitchTo(channel->Number());
+				Skins.Message(mtInfo, tr("Streaming active"));
+			}
+			else {
+				esyslog("streamdev: Can't receive channel %d (%s) from device %d. Moving live TV to other device failed (PrimaryDevice=%d, ActualDevice=%d)", channel->Number(), channel->Name(), device->CardIndex(), cDevice::PrimaryDevice()->CardIndex(), cDevice::ActualDevice()->CardIndex());
+				device = NULL;
+			}
+		}
+		// make sure we don't come in here next time
+		channel = NULL;
+		switched.Signal();
+	}
+	mutex.Unlock();
+}
+
 cServerConnection::cServerConnection(const char *Protocol, int Type):
 		cTBSocket(Type),
 		m_Protocol(Protocol),
@@ -22,10 +71,12 @@ cServerConnection::cServerConnection(const char *Protocol, int Type):
 		m_WriteBytes(0),
 		m_WriteIndex(0)
 {
+	m_SwitchLive = new cSwitchLive();
 }
 
 cServerConnection::~cServerConnection() 
 {
+	delete m_SwitchLive;
 }
 
 const cChannel* cServerConnection::ChannelFromString(const char *String, int *Apid, int *Dpid) {
@@ -302,34 +353,7 @@ cDevice *cServerConnection::GetDevice(const cChannel *Channel, int Priority)
 			&& UsedByLiveTV(device)) {
 		// now we would have to switch away live tv...let's see if live tv
 		// can be handled by another device
-#if VDRVERSNUM >= 10516
+		device = m_SwitchLive->Switch(device, Channel);
-		cDevice::SetAvoidDevice(device);
-		if (!Channels.SwitchTo(cDevice::CurrentChannel())) {
-			if (StreamdevServerSetup.SuspendMode == smAlways) {
-				Channels.SwitchTo(Channel->Number());
-				Skins.QueueMessage(mtInfo, tr("Streaming active"));
-			}
-			else {
-				dsyslog("streamdev: GetDevice: Live TV not suspended");
-				device = NULL;
-			}
-		}
-#else
-		const cChannel *current = Channels.GetByNumber(cDevice::CurrentChannel());
-		cDevice *newdev = current ? CheckDevice(current, 0, true, device) : NULL;
-		if (newdev) {
-			dsyslog("streamdev: GetDevice: Trying to move live TV to device %d", newdev->CardIndex());
-			newdev->SwitchChannel(current, true);
-		}
-		else if (StreamdevServerSetup.SuspendMode == smAlways) {
-			Channels.SwitchTo(Channel->Number());
-			Skins.QueueMessage(mtInfo, tr("Streaming active"));
-		}
-		else {
-			dsyslog("streamdev: GetDevice: Live TV not suspended");
-			device = NULL;
-		}
-#endif
 	}
 
 	if (!device) {
@@ -371,3 +395,8 @@ bool cServerConnection::ProvidesChannel(const cChannel *Channel, int Priority)
 	}
 	return device;
 }
+
+void cServerConnection::MainThreadHook()
+{
+	m_SwitchLive->Switch();
+}

server/connection.h

@@ -15,6 +15,7 @@ typedef std::pair<std::string,std::string> tStrStr;
 
 class cChannel;
 class cDevice;
+class cSwitchLive;
 
 /* Basic capabilities of a straight text-based protocol, most functions
    virtual to support more complicated protocols */
@@ -33,6 +34,8 @@ private:
 	uint        m_WriteBytes;
 	uint        m_WriteIndex;
 
+	cSwitchLive *m_SwitchLive;
+
 	tStrStrMap  m_Headers;
 
 	/* Check if a device would be available for transfering the given
@@ -108,6 +111,9 @@ public:
 	/* Test if a call to GetDevice would return a usable device. */
 	bool ProvidesChannel(const cChannel *Channel, int Priority);
 
+	/* Do things which must be done in VDR's main loop */
+	void MainThreadHook();
+
 	virtual void Flushed(void) {}
 
 	virtual void Detach(void) = 0;

server/server.c

@@ -121,7 +121,9 @@ void cStreamdevServer::Action(void)
 				cServerConnection *client = c->Accept();
 				if (!client)
 					continue;
+				Lock();
 				m_Clients.Add(client);
+				Unlock();
 
 				if (m_Clients.Count() > StreamdevServerSetup.MaxClients) {
 					esyslog("streamdev: too many clients, rejecting %s:%d",
@@ -153,17 +155,21 @@ void cStreamdevServer::Action(void)
 				isyslog("streamdev: closing streamdev connection to %s:%d", 
 				        s->RemoteIp().c_str(), s->RemotePort());
 				s->Close();
+				Lock();
 				m_Clients.Del(s);
+				Unlock();
 			}
 			s = next;
 		}
 	}
 	
+	Lock();
 	while (m_Clients.Count() > 0) {
 		cServerConnection *s = m_Clients.First();
 		s->Close();
 		m_Clients.Del(s);
 	}
+	Unlock();
 
 	while (m_Servers.Count() > 0) {
 		cServerComponent *c = m_Servers.First();
@@ -171,3 +177,10 @@ void cStreamdevServer::Action(void)
 		m_Servers.Del(c);
 	}
 }
+
+void cStreamdevServer::MainThreadHook(void) 
+{
+	cThreadLock lock(m_Instance);
+	for (cServerConnection *s = m_Clients.First(); s; s = m_Clients.Next(s))
+		s->MainThreadHook();
+}

server/server.h

@@ -36,6 +36,7 @@ public:
 	static void Initialize(void);
 	static void Destruct(void);
 	static bool Active(void);
+	static void MainThreadHook(void);
 };
 
 inline bool cStreamdevServer::Active(void) 

server/streamdev-server.c

@@ -130,6 +130,11 @@ cOsdObject *cPluginStreamdevServer::MainMenuAction(void)
 	return NULL;
 }
 
+void cPluginStreamdevServer::MainThreadHook(void)
+{
+	cStreamdevServer::MainThreadHook();
+}
+
 cMenuSetupPage *cPluginStreamdevServer::SetupMenu(void) 
 {
 	return new cStreamdevServerMenuSetupPage;

server/streamdev-server.h

@@ -26,6 +26,7 @@ public:
 	virtual cString Active(void);
 	virtual const char *MainMenuEntry(void);
 	virtual cOsdObject *MainMenuAction(void);
+	virtual void MainThreadHook(void);
 	virtual cMenuSetupPage *SetupMenu(void);
 	virtual bool SetupParse(const char *Name, const char *Value);
 };