Added 'Service' functions to the plugin interface

CONTRIBUTORS

@@ -1262,6 +1262,7 @@ Udo Richter <udo_richter@gmx.de>
  for fixing handling 'page down' after it was broken in version 1.3.26
  for suggesting a fix for an out-of-bounds memory access with audio language ids
  for reporting a problem with cRemux in a single thread
+ for adding 'Service' functions to the plugin interface
 
 Sven Kreiensen <svenk@kammer.uni-hannover.de>
  for his help in keeping 'channels.conf.terr' up to date

HISTORY

@@ -3711,3 +3711,5 @@ Video Disk Recorder Revision History
   one, or a timer on such a channel hits right after starting VDR.
 - Fixed cVideoRepacker to better handle errors in data (thanks to Reinhard Nissl).
 - Fixed cDvbTuner to avoid lockups on NPTL systems (thanks to Marcel Wiesweg).
+- Added 'Service' functions to the plugin interface (thanks to Udo Richter).
+  See PLUGINS.html, section "Custom services" for details.

PLUGINS.html

@@ -9,23 +9,23 @@
 <center><b>Version 1.3</b></center>
 <p>
 <center>
-Copyright &copy; 2004 Klaus Schmidinger<br>
+Copyright &copy; 2005 Klaus Schmidinger<br>
 <a href="mailto:kls@cadsoft.de">kls@cadsoft.de</a><br>
 <a href="http://www.cadsoft.de/vdr">www.cadsoft.de/vdr</a>
 </center>
 <p>
-<!--X1.3.18--><table width=100%><tr><td bgcolor=#0000AA>&nbsp;</td><td width=100%>
+<!--X1.3.19--><table width=100%><tr><td bgcolor=#0000AA>&nbsp;</td><td width=100%>
-Important modifications introduced in version 1.3.18 are marked like this.
-<!--X1.3.18--></td></tr></table>
-<!--X1.3.19--><table width=100%><tr><td bgcolor=#00AA00>&nbsp;</td><td width=100%>
 Important modifications introduced in version 1.3.19 are marked like this.
 <!--X1.3.19--></td></tr></table>
-<!--X1.3.20--><table width=100%><tr><td bgcolor=#AA0000>&nbsp;</td><td width=100%>
+<!--X1.3.20--><table width=100%><tr><td bgcolor=#00AA00>&nbsp;</td><td width=100%>
 Important modifications introduced in version 1.3.20 are marked like this.
 <!--X1.3.20--></td></tr></table>
-<!--X1.3.21--><table width=100%><tr><td bgcolor=#FF0000>&nbsp;</td><td width=100%>
+<!--X1.3.21--><table width=100%><tr><td bgcolor=#AA0000>&nbsp;</td><td width=100%>
 Important modifications introduced in version 1.3.21 are marked like this.
 <!--X1.3.21--></td></tr></table>
+<!--X1.3.30--><table width=100%><tr><td bgcolor=#FF0000>&nbsp;</td><td width=100%>
+Important modifications introduced in version 1.3.30 are marked like this.
+<!--X1.3.30--></td></tr></table>
 <p>
 VDR provides an easy to use plugin interface that allows additional functionality
 to be added to the program by implementing a dynamically loadable library file.
@@ -58,7 +58,7 @@ structures and allows it to hook itself into specific areas to perform special a
 <li><a href="#Command line arguments">Command line arguments</a>
 <li><a href="#Command line help">Command line help</a>
 <li><a href="#Getting started">Getting started</a>
-<!--X1.3.20--><table width=100%><tr><td bgcolor=#AA0000>&nbsp;</td><td width=100%>
+<!--X1.3.20--><table width=100%><tr><td bgcolor=#00AA00>&nbsp;</td><td width=100%>
 <li><a href="#Shutting down">Shutting down</a>
 <!--X1.3.20--></td></tr></table>
 <li><a href="#Main menu entry">Main menu entry</a>
@@ -68,6 +68,9 @@ structures and allows it to hook itself into specific areas to perform special a
 <li><a href="#The Setup menu">The Setup menu</a>
 <li><a href="#Configuration files">Configuration files</a>
 <li><a href="#Internationalization">Internationalization</a>
+<!--X1.3.30--><table width=100%><tr><td bgcolor=#FF0000>&nbsp;</td><td width=100%>
+<li><a href="#Custom services">Custom services</a>
+<!--X1.3.30--></td></tr></table>
 <li><a href="#Loading plugins into VDR">Loading plugins into VDR</a>
 <li><a href="#Building the distribution package">Building the distribution package</a>
 </ul>
@@ -81,7 +84,7 @@ structures and allows it to hook itself into specific areas to perform special a
 <li><a href="#Skins">Skins</a>
 <li><a href="#Themes">Themes</a>
 <li><a href="#Devices">Devices</a>
-<!--X1.3.21--><table width=100%><tr><td bgcolor=#FF0000>&nbsp;</td><td width=100%>
+<!--X1.3.21--><table width=100%><tr><td bgcolor=#AA0000>&nbsp;</td><td width=100%>
 <li><a href="#Audio">Audio</a>
 <!--X1.3.21--></td></tr></table>
 <li><a href="#Remote Control">Remote Control</a>
@@ -308,7 +311,7 @@ since VDR, for instance, has to create the plugin objects in order to get their
 command line help - and after that immediately destroys them again.
 <p>
 The <b>destructor</b> has to clean up any data created by the plugin.
-<!--X1.3.20--><table width=100%><tr><td bgcolor=#AA0000>&nbsp;</td><td width=100%>
+<!--X1.3.20--><table width=100%><tr><td bgcolor=#00AA00>&nbsp;</td><td width=100%>
 Any threads the plugin may have created shall be stopped in the
 <a href="#Shutting down"><tt>Stop()</tt></a> function.
 <!--X1.3.20--></td></tr></table>
@@ -506,7 +509,7 @@ VDR to exit.
 If the plugin doesn't implement any background functionality or internationalized
 texts, it doesn't need to implement either of these functions.
 
-<!--X1.3.20--><table width=100%><tr><td bgcolor=#AA0000>&nbsp;</td><td width=100%>
+<!--X1.3.20--><table width=100%><tr><td bgcolor=#00AA00>&nbsp;</td><td width=100%>
 <a name="Shutting down"><hr><h2>Shutting down</h2>
 
 <center><i><b>Stop it, right there!</b></i></center><p>
@@ -866,6 +869,77 @@ Texts are first searched for in the <i>Phrases</i> registered for this plugin (i
 and then in the global VDR texts. So a plugin can make use of texts defined by the
 core VDR code.
 
+<!--X1.3.30--><table width=100%><tr><td bgcolor=#FF0000>&nbsp;</td><td width=100%>
+<a name="Custom services"><hr><h2>Custom services</h2>
+
+<center><i><b>What can I do for you?</b></i></center><p>
+
+In some situations, two plugins may want to communicate directly, talking about things
+that VDR doesn't handle itself. For example, a plugin may want to use features
+that some other plugin offers, or it may want to inform other plugins about important
+things it does. To receive requests or messages, a plugin can implement the
+following function:
+
+<p><table><tr><td bgcolor=#F0F0F0><pre>
+virtual bool Service(const char *Id, void *Data = NULL);
+</pre></td></tr></table><p>
+
+<tt>Id</tt> is a unique identification string that identifies the service protocol.
+To avoid collisions, the string should contain a service name, the plugin name (unless
+the service is not related to a single plugin) and a protocol version number.
+<tt>Data</tt> points to a custom data structure or is <tt>NULL</tt> to detect whether
+the plugin supports this service. For each id string there should be a specification
+that describes the format of the data structure, and any change to the format should 
+be reflected by a change of the id string.
+<p>
+The function shall return <i>true</i> for any service id string it handles, and <i>false</i>
+otherwise. The function shall not perform any actions as long as <tt>Data</tt> is
+<tt>NULL</tt>. The plugins have to agreee in which situations the service
+may be called, for example whether the service may be called from every thread, or
+just from the main thread. A possible implementation could look like this:
+
+<p><table><tr><td bgcolor=#F0F0F0><pre>
+struct Hello_SetGreetingTime_v1_0 {
+  int NewGreetingTime;
+  };
+
+bool cPluginHello::Service(const char *Id, void *Data)
+{
+  if (strcmp(Id, "Hello-SetGreetingTime-v1.0") == 0) {
+     if (Data == NULL)
+        return true;
+     GreetingTime = ((Hello_SetGreetingTime_v1_0*)Data)-&gt;NewGreetingTime;
+     return true;
+     }
+  return false;
+}
+</pre></td></tr></table><p>
+
+<p>
+To send messages to, or request services from a specific plugin, one plugin can directly
+call another plugin's service function:
+
+<p><table><tr><td bgcolor=#F0F0F0><pre>
+Hello_SetGreetingTime_v1_0 hellodata;
+hellodata.NewGreetingTime = 3;
+cPlugin *Plugin = cPluginManager::GetPlugin("hello");
+if (Plugin)
+   Plugin-&gt;Service("Hello-SetGreetingTime-v1.0", &gt;hellodata);
+</pre></td></tr></table><p>
+
+To send messages to, or request services from some plugin that offers the protocol, a
+plugin can call the function <tt>cPluginManager::CallFirstService()</tt>. This function
+will send the request to the first plugin that supports this service protocol. The
+function returns a pointer to the plugin that handled the request, or <tt>NULL</tt>
+if no plugin handled the request.
+<p>
+To send a messages to all plugins, a plugin can call the function
+<tt>cPluginManager::CallAllServices()</tt>. This function will send the request to
+all plugins that support this service protocol. The function returns <tt>true</tt> if
+any plugin handled the request, or <tt>false</tt> if no plugin handled the request.
+
+<!--X1.3.30--></td></tr></table>
+
 <a name="Loading plugins into VDR"><hr><h2>Loading plugins into VDR</h2>
 
 <center><i><b>Saddling up!</b></i></center><p>
@@ -1046,7 +1120,6 @@ public:
 Take a look at the files <tt>player.h</tt> and <tt>dvbplayer.c</tt> to see how VDR implements
 its own player for the VDR recordings.
 <p>
-<!--X1.3.18--><table width=100%><tr><td bgcolor=#0000AA>&nbsp;</td><td width=100%>
 To play the actual data, the player needs to call its member function
 
 <p><table><tr><td bgcolor=#F0F0F0><pre>
@@ -1060,7 +1133,6 @@ is attached to. There are no prerequisites regarding the length or alignment of
 individual block of data. The sum of all blocks must simply result in the
 desired data stream, and it must be delivered fast enough so that the
 DVB device doesn't run out of data.
-<!--X1.3.18--></td></tr></table>
 To avoid busy loops the player should call its member function
 
 <p><table><tr><td bgcolor=#F0F0F0><pre>
@@ -1069,7 +1141,6 @@ bool DevicePoll(cPoller &amp;Poller, int TimeoutMs = 0);
 
 to determine whether the device is ready for further data.
 <p>
-<!--X1.3.18--><table width=100%><tr><td bgcolor=#0000AA>&nbsp;</td><td width=100%>
 By default all audio track handling is done by the device a player is
 attached to.
 If the player can provide more than a single audio track, and has special
@@ -1088,7 +1159,6 @@ bool DeviceSetAvailableTrack(eTrackType Type, int Index, uint16_t Id, const char
 </pre></td></tr></table><p>
 
 See <tt>device.h</tt> for details about the parameters for track handling.
-<!--X1.3.18--></td></tr></table>
 <p>
 The second part needed here is a control object that receives user input from the main
 program loop and reacts on this by telling the player what to do:
@@ -1206,7 +1276,7 @@ public:
   };
 
 cMyReceiver::cMyReceiver(int Pid)
-<!--X1.3.19--><table width=100%><tr><td bgcolor=#00AA00>&nbsp;</td><td width=100%>
+<!--X1.3.19--><table width=100%><tr><td bgcolor=#0000AA>&nbsp;</td><td width=100%>
 :cReceiver(0, -1, Pid)
 <!--X1.3.19--></td></tr></table>
 {
@@ -1384,9 +1454,7 @@ public:
   virtual cSkinDisplayMenu *DisplayMenu(void);
   virtual cSkinDisplayReplay *DisplayReplay(bool ModeOnly);
   virtual cSkinDisplayVolume *DisplayVolume(void);
-<!--X1.3.18--><table width=100%><tr><td bgcolor=#0000AA>&nbsp;</td><td width=100%>
   virtual cSkinDisplayMessage *DisplayTrack(int NumTracks, const char * const *Tracks);
-<!--X1.3.18--></td></tr></table>
   virtual cSkinDisplayMessage *DisplayMessage(void);
   };
 </pre></td></tr></table><p>
@@ -1513,13 +1581,11 @@ repectively.
 If the device can provide more than a single audio track, it can implement the
 following function to make them available:
 
-<!--X1.3.18--><table width=100%><tr><td bgcolor=#0000AA>&nbsp;</td><td width=100%>
 <p><table><tr><td bgcolor=#F0F0F0><pre>
 virtual void SetAudioTrackDevice(eTrackType Type);
 virtual int GetAudioChannelDevice(void);
 virtual void SetAudioChannelDevice(int AudioChannel);
 </pre></td></tr></table><p>
-<!--X1.3.18--></td></tr></table>
 
 <p>
 <b>Recording</b>
@@ -1669,7 +1735,7 @@ private:
   virtual void Action(void);
 public:
   cMyAudio(void);
-<!--X1.3.21--><table width=100%><tr><td bgcolor=#FF0000>&nbsp;</td><td width=100%>
+<!--X1.3.21--><table width=100%><tr><td bgcolor=#AA0000>&nbsp;</td><td width=100%>
   virtual void Play(const uchar *Data, int Length, uchar Id);
 <!--X1.3.21--></td></tr></table>
   virtual void Mute(bool On);

PLUGINS/src/servicedemo/COPYING

@@ -0,0 +1,340 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+                       59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
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+
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+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.

PLUGINS/src/servicedemo/HISTORY

@@ -0,0 +1,6 @@
+VDR Plugin 'servicedemo' Revision History
+-----------------------------------------
+
+2005-08-21: Version 0.1.1
+
+- Initial revision.

PLUGINS/src/servicedemo/Makefile

@@ -0,0 +1,87 @@
+#
+# Makefile for a Video Disk Recorder plugin
+#
+# $Id: Makefile 1.1 2005/08/21 10:43:12 kls Exp $
+
+# The official name of this plugin.
+# This name will be used in the '-P...' option of VDR to load the plugin.
+# By default the main source file also carries this name.
+#
+PLUGIN1 = svccli
+PLUGIN2 = svcsvr
+
+### The version number of this plugin (taken from the main source file):
+
+VERSION = $(shell grep 'static const char \*VERSION *=' $(PLUGIN1).c | awk '{ print $$6 }' | sed -e 's/[";]//g')
+
+### The C++ compiler and options:
+
+CXX      ?= g++
+CXXFLAGS ?= -O2 -Wall -Woverloaded-virtual
+
+### The directory environment:
+
+DVBDIR = ../../../../DVB
+VDRDIR = ../../..
+LIBDIR = ../../lib
+TMPDIR = /tmp
+
+### Allow user defined options to overwrite defaults:
+
+-include $(VDRDIR)/Make.config
+
+### The version number of VDR (taken from VDR's "config.h"):
+
+VDRVERSION = $(shell grep 'define VDRVERSION ' $(VDRDIR)/config.h | awk '{ print $$3 }' | sed -e 's/"//g')
+
+### The name of the distribution archive:
+
+ARCHIVE = svcintf-$(VERSION)
+PACKAGE = vdr-$(ARCHIVE)
+
+### Includes and Defines (add further entries here):
+
+INCLUDES += -I$(VDRDIR)/include -I$(DVBDIR)/include
+
+DEFINES += -D_GNU_SOURCE -DPLUGIN_NAME_I18N='"$(PLUGIN)"'
+
+### The object files (add further files here):
+
+OBJS = $(PLUGIN1).o $(PLUGIN2).o
+
+### Implicit rules:
+
+%.o: %.c
+	$(CXX) $(CXXFLAGS) -c $(DEFINES) $(INCLUDES) $<
+
+# Dependencies:
+
+MAKEDEP = g++ -MM -MG
+DEPFILE = .dependencies
+$(DEPFILE): Makefile
+	@$(MAKEDEP) $(DEFINES) $(INCLUDES) $(OBJS:%.o=%.c) > $@
+
+-include $(DEPFILE)
+
+### Targets:
+
+all: libvdr-$(PLUGIN1).so libvdr-$(PLUGIN2).so
+
+libvdr-$(PLUGIN1).so: $(PLUGIN1).o
+	$(CXX) $(CXXFLAGS) -shared $(PLUGIN1).o -o $@
+	@cp $@ $(LIBDIR)/$@.$(VDRVERSION)
+
+libvdr-$(PLUGIN2).so: $(PLUGIN2).o
+	$(CXX) $(CXXFLAGS) -shared $(PLUGIN2).o -o $@
+	@cp $@ $(LIBDIR)/$@.$(VDRVERSION)
+
+dist: clean
+	@-rm -rf $(TMPDIR)/$(ARCHIVE)
+	@mkdir $(TMPDIR)/$(ARCHIVE)
+	@cp -a * $(TMPDIR)/$(ARCHIVE)
+	@tar czf $(PACKAGE).tgz -C $(TMPDIR) $(ARCHIVE)
+	@-rm -rf $(TMPDIR)/$(ARCHIVE)
+	@echo Distribution package created as $(PACKAGE).tgz
+
+clean:
+	@-rm -f $(OBJS) $(DEPFILE) *.so *.tgz core* *~

PLUGINS/src/servicedemo/README

@@ -0,0 +1,16 @@
+This is a "plugin" for the Video Disk Recorder (VDR).
+
+Written by:                  Udo Richter <udo_richter@gmx.de>
+
+Project's homepage:          www.cadsoft.de/vdr
+
+Latest version available at: www.cadsoft.de/vdr
+
+See the file COPYING for license information.
+
+Description:
+
+Demonstration of how plugins can communicate with each other.
+
+Run VDR with '-Psvcsvr -Psvccli' and select the main menu
+option "Service demo" to run the demo.

PLUGINS/src/servicedemo/svccli.c

@@ -0,0 +1,90 @@
+/*
+ * svccli.c: Sample service client plugin
+ *
+ * See the README file for copyright information and how to reach the author.
+ *
+ * $Id: svccli.c 1.1 2005/08/21 10:44:29 kls Exp $
+ */
+
+#include <stdlib.h>
+#include <vdr/interface.h>
+#include <vdr/plugin.h>
+
+static const char *VERSION        = "0.1.1";
+static const char *DESCRIPTION    = "Service demo client";
+static const char *MAINMENUENTRY  = "Service demo";
+
+class cPluginSvcCli : public cPlugin {
+public:
+  virtual const char *Version(void) { return VERSION; }
+  virtual const char *Description(void) { return DESCRIPTION; }
+  virtual const char *MainMenuEntry(void) { return MAINMENUENTRY; }
+  virtual cOsdObject *MainMenuAction(void);
+  virtual bool Service(const char *Id, void *Data);
+  };
+
+struct ReportBoredPlugin_v1_0 {
+  cPlugin *BoredPlugin;
+  };
+
+struct AddService_v1_0 {
+  int a, b;
+  int sum;
+  };
+
+// --- cPluginSvcCli ----------------------------------------------------------
+
+cOsdObject *cPluginSvcCli::MainMenuAction(void)
+{
+  char s[128];
+  cPlugin *p;
+
+  // Inform server plugin that we are bored
+  // (directed communication)
+  ReportBoredPlugin_v1_0 rbp;
+  rbp.BoredPlugin = this;
+  p = cPluginManager::GetPlugin("svcsvr");
+  if (p)
+     p->Service("ReportBoredPlugin-v1.0", &rbp);
+
+  // See if any plugin can add
+  // (detect capability)
+  p = cPluginManager::CallFirstService("AddService-v1.0", NULL);
+  if (p) {
+     snprintf(s, sizeof(s), "Plugin %s can add", p->Name());
+     Interface->Confirm(s);
+     }
+
+  // Perform add
+  // (use general service)
+  AddService_v1_0 adds;
+  adds.a = 1;
+  adds.b = 1;
+  if (cPluginManager::CallFirstService("AddService-v1.0", &adds)) {
+     snprintf(s, sizeof(s), "Plugin thinks that 1+1=%i", adds.sum);
+     Interface->Confirm(s);
+     }
+
+  // Inform other plugins that we are bored
+  // (broadcast)
+  rbp.BoredPlugin = this;
+  cPluginManager::CallAllServices("ReportBoredPlugin-v1.0", &rbp);
+
+  return NULL;
+}
+
+bool cPluginSvcCli::Service(const char *Id, void *Data)
+{
+  if (strcmp(Id, "ReportBoredPlugin-v1.0") == 0) {
+     if (Data) {
+        ReportBoredPlugin_v1_0 *rbp = (ReportBoredPlugin_v1_0*)Data;
+        char s[128];
+        snprintf(s, sizeof(s), "Plugin %s informed client that it is bored.", rbp->BoredPlugin->Name());
+        Interface->Confirm(s);
+        }
+     return true;
+     }
+  return false;
+}
+
+VDRPLUGINCREATOR(cPluginSvcCli); // Don't touch this!

PLUGINS/src/servicedemo/svcsvr.c

@@ -0,0 +1,57 @@
+/*
+ * svcsvr.c: Sample service server plugin
+ *
+ * See the README file for copyright information and how to reach the author.
+ *
+ * $Id: svcsvr.c 1.1 2005/08/21 10:44:24 kls Exp $
+ */
+
+#include <stdlib.h>
+#include <vdr/interface.h>
+#include <vdr/plugin.h>
+
+static const char *VERSION        = "0.1.1";
+static const char *DESCRIPTION    = "Service demo server";
+
+class cPluginSvcSvr : public cPlugin {
+public:
+  virtual const char *Version(void) { return VERSION; }
+  virtual const char *Description(void) { return DESCRIPTION; }
+  virtual bool Service(const char *Id, void *Data);
+  };
+
+struct ReportBoredPlugin_v1_0 {
+  cPlugin *BoredPlugin;
+  };
+
+struct AddService_v1_0 {
+  int a, b;
+  int sum;
+  };
+
+// --- cPluginSvcSvr ----------------------------------------------------------
+
+bool cPluginSvcSvr::Service(const char *Id, void *Data)
+{
+  if (strcmp(Id,"ReportBoredPlugin-v1.0") == 0) {
+     if (Data) {
+        ReportBoredPlugin_v1_0 *rbp = (ReportBoredPlugin_v1_0*)Data;
+        char s[128];
+        snprintf(s, sizeof(s), "Plugin %s informed server that it is bored.", rbp->BoredPlugin->Name());
+        Interface->Confirm(s);
+        }
+     return true;
+     }
+
+  if (strcmp(Id,"AddService-v1.0") == 0) {
+     if (Data) {
+        AddService_v1_0 *data = (AddService_v1_0*)Data;
+        data->sum = data->a + data->b;
+        }
+     return true;
+     }
+
+  return false;
+}
+
+VDRPLUGINCREATOR(cPluginSvcSvr); // Don't touch this!

newplugin

@@ -12,7 +12,7 @@
 # See the main source file 'vdr.c' for copyright information and
 # how to reach the author.
 #
-# $Id: newplugin 1.18 2005/01/30 13:50:05 kls Exp $
+# $Id: newplugin 1.19 2005/08/21 09:32:08 kls Exp $
 
 $PLUGIN_NAME = $ARGV[0] || die "Usage: newplugin <name>\n";
 
@@ -170,6 +170,7 @@ public:
   virtual cOsdObject *MainMenuAction(void);
   virtual cMenuSetupPage *SetupMenu(void);
   virtual bool SetupParse(const char *Name, const char *Value);
+  virtual bool Service(const char *Id, void *Data = NULL);
   };
 
 cPlugin${PLUGIN_CLASS}::cPlugin$PLUGIN_CLASS(void)
@@ -236,6 +237,12 @@ bool cPlugin${PLUGIN_CLASS}::SetupParse(const char *Name, const char *Value)
   return false;
 }
 
+bool cPlugin${PLUGIN_CLASS}::Service(const char *Id, void *Data)
+{
+  // Handle custom service requests from other plugins
+  return false;
+}
+
 VDRPLUGINCREATOR(cPlugin$PLUGIN_CLASS); // Don't touch this!
 };
 

plugin.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: plugin.c 1.13 2005/01/30 14:05:20 kls Exp $
+ * $Id: plugin.c 1.14 2005/08/21 09:35:28 kls Exp $
  */
 
 #include "plugin.h"
@@ -99,6 +99,11 @@ void cPlugin::SetupStore(const char *Name, int Value)
   Setup.Store(Name, Value, this->Name());
 }
 
+bool cPlugin::Service(const char *Id, void *Data)
+{
+  return false;
+}
+
 void cPlugin::RegisterI18n(const tI18nPhrase * const Phrases)
 {
   I18nRegister(Phrases, Name());
@@ -372,6 +377,31 @@ cPlugin *cPluginManager::GetPlugin(const char *Name)
   return NULL;
 }
 
+cPlugin *cPluginManager::CallFirstService(const char *Id, void *Data)
+{
+  if (pluginManager) {
+     for (cDll *dll = pluginManager->dlls.First(); dll; dll = pluginManager->dlls.Next(dll)) {
+         cPlugin *p = dll->Plugin();
+         if (p && p->Service(Id, Data))
+            return p;
+         }
+     }
+  return NULL;
+}
+
+bool cPluginManager::CallAllServices(const char *Id, void *Data)
+{
+  bool found=false;
+  if (pluginManager) {
+     for (cDll *dll = pluginManager->dlls.First(); dll; dll = pluginManager->dlls.Next(dll)) {
+         cPlugin *p = dll->Plugin();
+         if (p && p->Service(Id, Data))
+            found = true;
+         }
+     }
+  return found;
+}
+
 void cPluginManager::StopPlugins(void)
 {
   for (cDll *dll = dlls.Last(); dll; dll = dlls.Prev(dll)) {

plugin.h

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: plugin.h 1.8 2005/01/30 14:03:48 kls Exp $
+ * $Id: plugin.h 1.9 2005/08/21 09:32:08 kls Exp $
  */
 
 #ifndef __PLUGIN_H
@@ -50,6 +50,8 @@ public:
 
   void RegisterI18n(const tI18nPhrase * const Phrases);
 
+  virtual bool Service(const char *Id, void *Data = NULL);
+
   static void SetConfigDirectory(const char *Dir);
   static const char *ConfigDirectory(const char *PluginName = NULL);
   };
@@ -88,6 +90,8 @@ public:
   static bool HasPlugins(void);
   static cPlugin *GetPlugin(int Index);
   static cPlugin *GetPlugin(const char *Name);
+  static cPlugin *CallFirstService(const char *Id, void *Data = NULL);
+  static bool CallAllServices(const char *Id, void *Data = NULL);
   void StopPlugins(void);
   void Shutdown(void);
   };