diff --git a/CONTRIBUTORS b/CONTRIBUTORS index 2eaec61a..a4942419 100644 --- a/CONTRIBUTORS +++ b/CONTRIBUTORS @@ -1262,6 +1262,7 @@ Udo Richter 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 for his help in keeping 'channels.conf.terr' up to date diff --git a/HISTORY b/HISTORY index 9406d6c8..601dbad4 100644 --- a/HISTORY +++ b/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. diff --git a/PLUGINS.html b/PLUGINS.html index 111b545a..9cc53153 100644 --- a/PLUGINS.html +++ b/PLUGINS.html @@ -9,23 +9,23 @@
Version 1.3

-Copyright © 2004 Klaus Schmidinger
+Copyright © 2005 Klaus Schmidinger
kls@cadsoft.de
www.cadsoft.de/vdr

-
  -Important modifications introduced in version 1.3.18 are marked like this. -
-
  +
  Important modifications introduced in version 1.3.19 are marked like this.
-
  +
  Important modifications introduced in version 1.3.20 are marked like this.
-
  +
  Important modifications introduced in version 1.3.21 are marked like this.
+
  +Important modifications introduced in version 1.3.30 are marked like this. +

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

  • Command line arguments
  • Command line help
  • Getting started -
      +
     
  • Shutting down
  • Main menu entry @@ -68,6 +68,9 @@ structures and allows it to hook itself into specific areas to perform special a
  • The Setup menu
  • Configuration files
  • Internationalization +
      +
  • Custom services +
  • Loading plugins into VDR
  • Building the distribution package @@ -81,7 +84,7 @@ structures and allows it to hook itself into specific areas to perform special a
  • Skins
  • Themes
  • Devices -
      +
     
  • Audio
  • Remote Control @@ -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.

    The destructor has to clean up any data created by the plugin. -
      +
      Any threads the plugin may have created shall be stopped in the Stop() function.
    @@ -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. -
      +
     

    Shutting down

    Stop it, right there!

    @@ -866,6 +869,77 @@ Texts are first searched for in the Phrases 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. +
      +

    Custom services

    + +
    What can I do for you?

    + +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: + +

    +virtual bool Service(const char *Id, void *Data = NULL);
+

    + +Id 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. +Data points to a custom data structure or is NULL 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. +

    +The function shall return true for any service id string it handles, and false +otherwise. The function shall not perform any actions as long as Data is +NULL. 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: + +

    +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)->NewGreetingTime;
+     return true;
+     }
+  return false;
+}
+

    + +

    +To send messages to, or request services from a specific plugin, one plugin can directly +call another plugin's service function: + +

    +Hello_SetGreetingTime_v1_0 hellodata;
+hellodata.NewGreetingTime = 3;
+cPlugin *Plugin = cPluginManager::GetPlugin("hello");
+if (Plugin)
+   Plugin->Service("Hello-SetGreetingTime-v1.0", >hellodata);
+

    + +To send messages to, or request services from some plugin that offers the protocol, a +plugin can call the function cPluginManager::CallFirstService(). 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 NULL +if no plugin handled the request. +

    +To send a messages to all plugins, a plugin can call the function +cPluginManager::CallAllServices(). This function will send the request to +all plugins that support this service protocol. The function returns true if +any plugin handled the request, or false if no plugin handled the request. + +

    +

    Loading plugins into VDR

    Saddling up!

    @@ -1046,7 +1120,6 @@ public: Take a look at the files player.h and dvbplayer.c to see how VDR implements its own player for the VDR recordings.

    -
      To play the actual data, the player needs to call its member function 

    @@ -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.
-
    To avoid busy loops the player should call its member function 

    @@ -1069,7 +1141,6 @@ bool DevicePoll(cPoller &Poller, int TimeoutMs = 0);
 
 to determine whether the device is ready for further data.
 
    
-
     
 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
 
    
 
 See device.h for details about the parameters for track handling.
-

    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) -
      +
      :cReceiver(0, -1, Pid)
    { @@ -1384,9 +1454,7 @@ public: virtual cSkinDisplayMenu *DisplayMenu(void); virtual cSkinDisplayReplay *DisplayReplay(bool ModeOnly); virtual cSkinDisplayVolume *DisplayVolume(void); -
      virtual cSkinDisplayMessage *DisplayTrack(int NumTracks, const char * const *Tracks); -
    virtual cSkinDisplayMessage *DisplayMessage(void); };

    @@ -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: -
      

     virtual void SetAudioTrackDevice(eTrackType Type);
 virtual int GetAudioChannelDevice(void);
 virtual void SetAudioChannelDevice(int AudioChannel);

    -

    Recording @@ -1669,7 +1735,7 @@ private: virtual void Action(void); public: cMyAudio(void); -
      +
      virtual void Play(const uchar *Data, int Length, uchar Id);
    virtual void Mute(bool On); diff --git a/PLUGINS/src/servicedemo/COPYING b/PLUGINS/src/servicedemo/COPYING new file mode 100644 index 00000000..5b6e7c66 --- /dev/null +++ b/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. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. 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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. + + , 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. diff --git a/PLUGINS/src/servicedemo/HISTORY b/PLUGINS/src/servicedemo/HISTORY new file mode 100644 index 00000000..16a0c430 --- /dev/null +++ b/PLUGINS/src/servicedemo/HISTORY @@ -0,0 +1,6 @@ +VDR Plugin 'servicedemo' Revision History +----------------------------------------- + +2005-08-21: Version 0.1.1 + +- Initial revision. diff --git a/PLUGINS/src/servicedemo/Makefile b/PLUGINS/src/servicedemo/Makefile new file mode 100644 index 00000000..a7678fff --- /dev/null +++ b/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* *~ diff --git a/PLUGINS/src/servicedemo/README b/PLUGINS/src/servicedemo/README new file mode 100644 index 00000000..16dfbfb6 --- /dev/null +++ b/PLUGINS/src/servicedemo/README @@ -0,0 +1,16 @@ +This is a "plugin" for the Video Disk Recorder (VDR). + +Written by: Udo Richter + +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. diff --git a/PLUGINS/src/servicedemo/svccli.c b/PLUGINS/src/servicedemo/svccli.c new file mode 100644 index 00000000..9a4ed444 --- /dev/null +++ b/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 +#include +#include + +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! diff --git a/PLUGINS/src/servicedemo/svcsvr.c b/PLUGINS/src/servicedemo/svcsvr.c new file mode 100644 index 00000000..7aff2b98 --- /dev/null +++ b/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 +#include +#include + +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! diff --git a/newplugin b/newplugin index 4a92159d..8badddfb 100755 --- a/newplugin +++ b/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 = $ARGV[0] || die "Usage: newplugin \n"; @@ -170,6 +170,7 @@ public: virtual cOsdObject *MainMenuAction(void); virtual cMenuSetupPage *SetupMenu(void); virtual bool SetupParse(const char *Name, const char *Value); + virtual bool Service(const char *Id, void *Data = NULL); }; cPlugin${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! }; diff --git a/plugin.c b/plugin.c index b7ebf372..8a316cc0 100644 --- a/plugin.c +++ b/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)) { diff --git a/plugin.h b/plugin.h index 3d56b175..3befbbba 100644 --- a/plugin.h +++ b/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); };