Lua: Add new callback playing_changed for playing status changes

Signed-off-by: Jean-Philippe André <jpeg@videolan.org>

include/vlc_extensions.h

@@ -75,6 +75,7 @@ enum
     EXTENSION_TRIGGER,        /**< arg1: extension_t* */
     EXTENSION_TRIGGER_MENU,   /**< arg1: extension_t*, int (uint16_t) */
     EXTENSION_SET_INPUT,      /**< arg1: extension_t*, arg2 (input_thread_t) */
+    EXTENSION_PLAYING_CHANGED, /**< arg1: extension_t*, arg2 int( playing status ) */
 };
 
 /**
@@ -153,6 +154,13 @@ static inline int extension_SetInput( extensions_manager_t *p_mgr,
     return extension_Control( p_mgr, EXTENSION_SET_INPUT, p_ext, p_input );
 }
 
+static inline int extension_PlayingChanged( extensions_manager_t *p_mgr,
+                                            extension_t *p_ext,
+                                            int state )
+{
+    return extension_Control( p_mgr, EXTENSION_PLAYING_CHANGED, p_ext, state );
+}
+
 /** Can this extension only be triggered but not activated?
     Not compatible with HasMenu */
 #define extension_TriggerOnly( mgr, ext ) \

modules/misc/lua/extension.c

@@ -43,12 +43,14 @@ static const luaL_Reg p_reg[] =
 #define EXT_TRIGGER_ONLY      (1 << 1)   ///< Hook: trigger. Not activable
 #define EXT_INPUT_LISTENER    (1 << 2)   ///< Hook: input_changed
 #define EXT_META_LISTENER     (1 << 3)   ///< Hook: meta_changed
+#define EXT_PLAYING_LISTENER  (1 << 4)   ///< Hook: status_changed
 
 const char* const ppsz_capabilities[] = {
     "menu",
     "trigger",
     "input-listener",
     "meta-listener",
+    "playing-listener",
     NULL
 };
 
@@ -529,7 +531,18 @@ static int Control( extensions_manager_t *p_mgr, int i_control, va_list args )
             UnlockExtension( p_ext );
             break;
         }
-
+        case EXTENSION_PLAYING_CHANGED:
+        {
+            extension_t *p_ext;
+            p_ext = ( extension_t* ) va_arg( args, extension_t* );
+            assert( p_ext->psz_name != NULL );
+            i = ( int ) va_arg( args, int );
+            if( p_ext->p_sys->i_capabilities & EXT_PLAYING_LISTENER )
+            {
+                PushCommand( p_ext, CMD_PLAYING_CHANGED, i );
+            }
+            break;
+        }
         default:
             msg_Warn( p_mgr, "Control '%d' not yet implemented in Extension",
                       i_control );

modules/misc/lua/extension.h

@@ -39,6 +39,7 @@ TYPEDEF_ARRAY( extension_t, array_extension_t );
 #define CMD_SET_INPUT   6    /* No arg. Just signal current input changed */
 #define CMD_UPDATE_META 7    /* No arg. Just signal current input item meta
                               * changed */
+#define CMD_PLAYING_CHANGED 8 /* Arg1 = int*, New playing status  */
 
 //Data types
 typedef enum

modules/misc/lua/extension_thread.c

@@ -122,6 +122,7 @@ static void FreeCommands( struct command_t *command )
             break;
 
         case CMD_TRIGGERMENU:
+        case CMD_PLAYING_CHANGED:
             free( command->data[0] ); // Arg1 is int*, to free
             break;
 
@@ -228,6 +229,19 @@ int __PushCommand( extension_t *p_ext,  bool b_unique, int i_command,
                 cmd->data[0] = pi;
             }
             break;
+        case CMD_PLAYING_CHANGED:
+            {
+                int *pi = malloc( sizeof( int ) );
+                if( !pi )
+                {
+                    free( cmd );
+                    vlc_mutex_unlock( &p_ext->p_sys->command_lock );
+                    return VLC_ENOMEM;
+                }
+                *pi = va_arg( args, int );
+                cmd->data[0] = pi;
+            }
+            break;
         case CMD_CLOSE:
         case CMD_SET_INPUT:
         case CMD_UPDATE_META:
@@ -362,6 +376,13 @@ static void* Run( void *data )
                         break;
                     }
 
+                    case CMD_PLAYING_CHANGED:
+                    {
+                        lua_ExecuteFunction( p_mgr, p_ext, "playing_changed",
+                                LUA_NUM, *((int *)cmd->data[0]), LUA_END );
+                        break;
+                    }
+
                     default:
                     {
                         msg_Dbg( p_mgr, "Unknown command in extension command queue: %d",