* include/vlc_block.h, modules/codec/libmpeg2.c: re-added the discontinuity flag in block_t and re-enabled the discontinuity gestion in the libmpeg2 codec.
* include/vlc_block_helper.h: implemented bytestream reading helper functions for chained blocks.
* modules/codec/a52.c: modified to use the bytestream reading functions.
  The flexibility added by these functions makes the code simpler and better at detecting synchro code emulations.

include/vlc_block.h

@@ -2,7 +2,7 @@
  * vlc_block.h: Data blocks management functions
  *****************************************************************************
  * Copyright (C) 2003 VideoLAN
- * $Id: vlc_block.h,v 1.2 2003/09/02 20:19:25 gbazin Exp $
+ * $Id: vlc_block.h,v 1.3 2003/09/30 20:23:03 gbazin Exp $
  *
  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
  *
@@ -38,6 +38,8 @@ struct block_t
     mtime_t     i_pts;
     mtime_t     i_dts;
 
+    vlc_bool_t  b_discontinuity; /* only temporary */
+
     int         i_buffer;
     uint8_t     *p_buffer;
 

modules/codec/libmpeg2.c

@@ -2,7 +2,7 @@
  * libmpeg2.c: mpeg2 video decoder module making use of libmpeg2.
  *****************************************************************************
  * Copyright (C) 1999-2001 VideoLAN
- * $Id: libmpeg2.c,v 1.27 2003/09/03 10:23:17 gbazin Exp $
+ * $Id: libmpeg2.c,v 1.28 2003/09/30 20:23:03 gbazin Exp $
  *
  * Authors: Gildas Bazin <gbazin@netcourrier.com>
  *          Christophe Massiot <massiot@via.ecp.fr>
@@ -193,12 +193,11 @@ static int RunDecoder( decoder_t *p_dec, block_t *p_block )
                 return VLC_SUCCESS;
             }
 
-#if 0
-                if( p_pes->b_discontinuity && p_sys->p_synchro 
+            if( p_block->b_discontinuity && p_sys->p_synchro 
                 && p_sys->p_info->sequence->width != (unsigned)-1 )
             {
                 vout_SynchroReset( p_sys->p_synchro );
-                    if ( p_sys->p_info->current_fbuf != NULL
+                if( p_sys->p_info->current_fbuf != NULL
                     && p_sys->p_info->current_fbuf->id != NULL )
                 {
                     p_sys->b_garbage_pic = 1;
@@ -232,7 +231,6 @@ static int RunDecoder( decoder_t *p_dec, block_t *p_block )
                     vout_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
                 }
             }
-#endif
 
             if( p_block->i_pts )
             {