Done :
- ported the alsa plugin to the news vlc module API
- cosmetic changes

To do :
- check if it works with the latest alsa release
- add features ... prepare for 4 or more speakers

Makefile.in

@@ -506,7 +506,7 @@ lib/dsp.so: $(PLUGIN_DSP)
 	$(CC) $(PCFLAGS) -shared -o $@ $^
 
 lib/alsa.so: $(PLUGIN_ALSA)
-	$(CC) $(PCFLAGS) -shared -o $@ $^
+	$(CC) $(PCFLAGS) -shared -o $@ $^ -lasound
 
 lib/null.so: $(PLUGIN_NULL)
 	$(CC) $(PCFLAGS) -shared -o $@ $^

plugins/alsa/alsa.c

 /*****************************************************************************
- * dsp.c : OSS /dev/dsp plugin for vlc
+ * alsa.c : alsa plugin for vlc
  *****************************************************************************
  * Copyright (C) 2000 VideoLAN
  *
@@ -21,81 +21,99 @@
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  *****************************************************************************/
 
+#define MODULE_NAME alsa
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+
 #include "defs.h"
 
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/asoundlib.h>                                    /* for alsa :) */
+#include <linux/asound.h>
 #include <fcntl.h>
 #include <stdlib.h>                                      /* malloc(), free() */
-// #include <unistd.h>                                            /* close() */
 
 #include "config.h"
 #include "common.h"                                     /* boolean_t, byte_t */
 #include "threads.h"
 #include "mtime.h"
 #include "tests.h"
-#include "plugins.h"
 
 #include "interface.h"
-#include "audio_output.h"
-#include "video.h"
-#include "video_output.h"
 
 #include "main.h"
 
+#include "modules.h"
+#include "modules_inner.h"
 
 /*****************************************************************************
- * Exported prototypes
+ * Build configuration tree.
  *****************************************************************************/
-static void aout_GetPlugin( p_aout_thread_t p_aout );
+MODULE_CONFIG_START
+    ADD_COMMENT( "Yeah, alsa rocks !" )
+MODULE_CONFIG_END     
 
-/* Audio output */
-int     aout_AlsaOpen         ( aout_thread_t *p_aout );
-int     aout_AlsaSetFormat    ( aout_thread_t *p_aout );
-long    aout_AlsaGetBufInfo   ( aout_thread_t *p_aout, long l_buffer_info );
-void    aout_AlsaPlay         ( aout_thread_t *p_aout, byte_t *buffer,
-                               int i_size );
-void    aout_AlsaClose        ( aout_thread_t *p_aout );
+/*****************************************************************************
+ * Capabilities defined in the other files.
+ *****************************************************************************/
+extern void aout_getfunctions( function_list_t * p_function_list );
 
 /*****************************************************************************
- * GetConfig: get the plugin structure and configuration
+ * InitModule: get the module structure and configuration.
+ *****************************************************************************
+ * We have to fill psz_name, psz_longname and psz_version. These variables
+ * will be strdup()ed later by the main application because the module can
+ * be unloaded later to save memory, and we want to be able to access this
+ * data even after the module has been unloaded.
  *****************************************************************************/
-plugin_info_t * GetConfig( void )
+int InitModule( module_t * p_module )
 {
-    plugin_info_t * p_info = (plugin_info_t *) malloc( sizeof(plugin_info_t) );
-
-    p_info->psz_name    = "Alsa plugin";
-    p_info->psz_version = VERSION;
-    p_info->psz_author  = "the VideoLAN team <vlc@videolan.org>";
-
-    p_info->aout_GetPlugin = aout_GetPlugin;
-    p_info->vout_GetPlugin = NULL;
-    p_info->intf_GetPlugin = NULL;
-    p_info->yuv_GetPlugin  = NULL;
-
-
-    /* TODO : test if alsa is available */
-    p_info->i_score = 0x100;
+    p_module->psz_name = MODULE_STRING;
+    p_module->psz_longname = "Alsa audio module";
+    p_module->psz_version = VERSION;
+    p_module->i_capabilities =  MODULE_CAPABILITY_NULL
+                                | MODULE_CAPABILITY_AOUT;
+    return( 0 );
+}
+    
 
-    /* If this plugin was requested, score it higher */
-    if( TestMethod( AOUT_METHOD_VAR, "alsa" ) )
+/*****************************************************************************
+ * ActivateModule: set the module to an usable state.
+ *****************************************************************************
+ * This function fills the capability functions and the configuration
+ * structure. Once ActivateModule() has been called, the i_usage can
+ * be set to 0 and calls to NeedModule() be made to increment it. To unload
+ * the module, one has to wait until i_usage == 0 and call DeactivateModule().
+ *****************************************************************************/
+int ActivateModule( module_t * p_module )
+{
+    p_module->p_functions = malloc( sizeof( module_functions_t ) );
+    if( p_module->p_functions == NULL )
     {
-        p_info->i_score += 0x200;
+        return( -1 );
     }
 
-    return( p_info );
+    aout_getfunctions( &p_module->p_functions->aout );
+    
+    p_module->p_config = p_config;
+    
+    return( 0 );
 }
 
+
 /*****************************************************************************
- * Following functions are only called through the p_info structure
+ * DeactivateModule: make sure the module can be unloaded.
+ *****************************************************************************
+ * This function must only be called when i_usage == 0. If it successfully
+ * returns, i_usage can be set to -1 and the module unloaded. Be careful to
+ * lock usage_lock during the whole process.
  *****************************************************************************/
-
-static void aout_GetPlugin( p_aout_thread_t p_aout )
+int DeactivateModule( module_t * p_module )
 {
-    p_aout->p_open        = aout_AlsaOpen;
-    p_aout->p_setformat   = aout_AlsaSetFormat;
-    p_aout->p_getbufinfo  = aout_AlsaGetBufInfo;
-    p_aout->p_play        = aout_AlsaPlay;
-    p_aout->p_close       = aout_AlsaClose;
+        free( p_module->p_functions );
+
+            return( 0 );
 }