* modules/access/vcd/vcd.*: added entry points support (sort of

    chapters).
  * modules/gui/gtk/gtk_callbacks.c: added some locks to the
    navigation functions

modules/access/vcd/vcd.h

@@ -2,7 +2,7 @@
  * vcd.h: thread structure of the VCD plugin
  *****************************************************************************
  * Copyright (C) 1999-2001 VideoLAN
- * $Id: vcd.h,v 1.2 2002/10/15 19:56:59 gbazin Exp $
+ * $Id: vcd.h,v 1.3 2002/11/06 15:41:29 jobi Exp $
  *
  * Author: Johan Bilien <jobi@via.ecp.fr>
  *
@@ -29,11 +29,56 @@
 #define VCD_SECTOR_SIZE 2352
 /* size of a CD sector */
 #define CD_SECTOR_SIZE 2048
+/* sector containing the entry points */
+#define VCD_ENTRIES_SECTOR 151
+
+/*****************************************************************************
+ * Misc. Macros
+ *****************************************************************************/
+/* LBA = msf.frame + 75 * ( msf.second + 60 * msf.minute ) */
+#define MSF_TO_LBA(min, sec, frame) ((int)frame + 75 * (sec + 60 * min))
+/* LBA = msf.frame + 75 * ( msf.second - 2 + 60 * msf.minute ) */
+#define MSF_TO_LBA2(min, sec, frame) ((int)frame + 75 * (sec -2 + 60 * min))
+/* Converts BCD to Binary data */
+#define BCD_TO_BIN(i) \
+    ((uint8_t)(0xf & (uint8_t)i)+((uint8_t)10*((uint8_t)i >> 4)))
 
 #ifndef VCDDEV_T
 typedef struct vcddev_s vcddev_t;
 #endif
 
+/*****************************************************************************
+ * structure to store minute/second/frame locations
+ *****************************************************************************/
+typedef struct msf_s
+{
+    uint8_t minute;
+    uint8_t second;
+    uint8_t frame;
+} msf_t;
+
+
+/*****************************************************************************
+ * entries_sect structure: the sector containing entry points
+ *****************************************************************************/
+typedef struct entries_sect_s
+{
+    uint8_t psz_id[8];                              /* "ENTRYVCD" */
+    uint8_t i_version;                              /* 0x02 VCD2.0
+                                                       0x01 SVCD  */
+    uint8_t i_sys_prof_tag;                         /* 0x01 if VCD1.1
+                                                       0x00 else */
+    uint16_t i_entries_nb;                          /* entries number <= 500 */
+
+    struct
+    {
+        uint8_t i_track;                            /* track number */
+        msf_t   msf;                                /* msf location
+                                                       (in BCD format) */
+    } entry[500];
+    uint8_t zeros[36];                              /* should be 0x00 */
+} entries_sect_t;
+
 /*****************************************************************************
  * Prototypes
  *****************************************************************************/

modules/gui/gtk/gtk_callbacks.c

@@ -2,7 +2,7 @@
  * gtk_callbacks.c : Callbacks for the Gtk+ plugin.
  *****************************************************************************
  * Copyright (C) 2000, 2001 VideoLAN
- * $Id: gtk_callbacks.c,v 1.3 2002/09/30 11:05:39 sam Exp $
+ * $Id: gtk_callbacks.c,v 1.4 2002/11/06 15:41:29 jobi Exp $
  *
  * Authors: Samuel Hocevar <sam@zoy.org>
  *          Stphane Borel <stef@via.ecp.fr>
@@ -217,11 +217,13 @@ void GtkTitlePrev( GtkButton * button, gpointer user_data )
 
     p_intf = GtkGetIntf( button );
 
+    vlc_mutex_lock( &p_intf->p_sys->p_input->stream.stream_lock );
     i_id = p_intf->p_sys->p_input->stream.p_selected_area->i_id - 1;
 
     if( i_id >= 0 )
     {
         p_area = p_intf->p_sys->p_input->stream.pp_areas[i_id];
+        vlc_mutex_unlock( &p_intf->p_sys->p_input->stream.stream_lock );
         input_ChangeArea( p_intf->p_sys->p_input, (input_area_t*)p_area );
 
         input_SetStatus( p_intf->p_sys->p_input, INPUT_STATUS_PLAY );
@@ -229,8 +231,8 @@ void GtkTitlePrev( GtkButton * button, gpointer user_data )
         p_intf->p_sys->b_title_update = 1;
         vlc_mutex_lock( &p_intf->p_sys->p_input->stream.stream_lock );
         GtkSetupMenus( p_intf );
-        vlc_mutex_unlock( &p_intf->p_sys->p_input->stream.stream_lock );
     }
+    vlc_mutex_unlock( &p_intf->p_sys->p_input->stream.stream_lock );
 }
 
 
@@ -241,11 +243,13 @@ void GtkTitleNext( GtkButton * button, gpointer user_data )
     int             i_id;
 
     p_intf = GtkGetIntf( button );
+    vlc_mutex_lock( &p_intf->p_sys->p_input->stream.stream_lock );
     i_id = p_intf->p_sys->p_input->stream.p_selected_area->i_id + 1;
 
     if( i_id < p_intf->p_sys->p_input->stream.i_area_nb )
     {
         p_area = p_intf->p_sys->p_input->stream.pp_areas[i_id];   
+        vlc_mutex_unlock( &p_intf->p_sys->p_input->stream.stream_lock );
         input_ChangeArea( p_intf->p_sys->p_input, (input_area_t*)p_area );
 
         input_SetStatus( p_intf->p_sys->p_input, INPUT_STATUS_PLAY );
@@ -253,8 +257,8 @@ void GtkTitleNext( GtkButton * button, gpointer user_data )
         p_intf->p_sys->b_title_update = 1;
         vlc_mutex_lock( &p_intf->p_sys->p_input->stream.stream_lock );
         GtkSetupMenus( p_intf );
-        vlc_mutex_unlock( &p_intf->p_sys->p_input->stream.stream_lock );
     }
+    vlc_mutex_unlock( &p_intf->p_sys->p_input->stream.stream_lock );
 }
 
 
@@ -264,20 +268,22 @@ void GtkChapterPrev( GtkButton * button, gpointer user_data )
     input_area_t *  p_area;
 
     p_intf = GtkGetIntf( button );
+    vlc_mutex_lock( &p_intf->p_sys->p_input->stream.stream_lock );
     p_area = p_intf->p_sys->p_input->stream.p_selected_area;
 
     if( p_area->i_part > 0 )
     {
         p_area->i_part--;
+        vlc_mutex_unlock( &p_intf->p_sys->p_input->stream.stream_lock );
         input_ChangeArea( p_intf->p_sys->p_input, (input_area_t*)p_area );
+        vlc_mutex_lock( &p_intf->p_sys->p_input->stream.stream_lock );
  
         input_SetStatus( p_intf->p_sys->p_input, INPUT_STATUS_PLAY );
 
         p_intf->p_sys->b_chapter_update = 1;
-        vlc_mutex_lock( &p_intf->p_sys->p_input->stream.stream_lock );
         GtkSetupMenus( p_intf );
-        vlc_mutex_unlock( &p_intf->p_sys->p_input->stream.stream_lock );
     }
+    vlc_mutex_unlock( &p_intf->p_sys->p_input->stream.stream_lock );
 }
 
 
@@ -287,20 +293,23 @@ void GtkChapterNext( GtkButton * button, gpointer user_data )
     input_area_t *  p_area;
 
     p_intf = GtkGetIntf( button );
+    vlc_mutex_lock( &p_intf->p_sys->p_input->stream.stream_lock );
     p_area = p_intf->p_sys->p_input->stream.p_selected_area;
 
     if( p_area->i_part < p_area->i_part_nb )
     {
         p_area->i_part++;
+        vlc_mutex_unlock( &p_intf->p_sys->p_input->stream.stream_lock );
         input_ChangeArea( p_intf->p_sys->p_input, (input_area_t*)p_area );
+        vlc_mutex_lock( &p_intf->p_sys->p_input->stream.stream_lock );
 
         input_SetStatus( p_intf->p_sys->p_input, INPUT_STATUS_PLAY );
 
         p_intf->p_sys->b_chapter_update = 1;
         vlc_mutex_lock( &p_intf->p_sys->p_input->stream.stream_lock );
         GtkSetupMenus( p_intf );
-        vlc_mutex_unlock( &p_intf->p_sys->p_input->stream.stream_lock );
     }
+    vlc_mutex_unlock( &p_intf->p_sys->p_input->stream.stream_lock );
 }
 
 /****************************************************************************