codec: cc: flag blocks when packetized and ordered

avoids reordering and display delay

modules/codec/cc.c

@@ -311,6 +311,12 @@ static block_t *Pop( decoder_t *p_dec )
      * XXX it won't work with H264 which use non out of order B picture or MMCO
      */
 
+    if( p_sys->i_block && (p_sys->pp_block[0]->i_flags & BLOCK_FLAG_PRIVATE_MASK) )
+    {
+        p_sys->i_block--;
+        return p_sys->pp_block[0];
+    }
+
     /* Wait for a P and output all *previous* picture by pts order (for
      * hierarchical B frames) */
     if( p_sys->i_block <= 1 ||

modules/codec/cc.h

@@ -26,6 +26,8 @@
 
 #include <vlc_bits.h>
 
+#define BLOCK_FLAG_ORDERED_CAPTIONS (0x01 << BLOCK_FLAG_PRIVATE_SHIFT)
+
 /* CC have a maximum rate of 9600 bit/s (per field?) */
 #define CC_MAX_DATA_SIZE (2 * 3*600)
 enum

modules/demux/mp4/mp4.c

@@ -38,6 +38,7 @@
 #include <vlc_aout.h>
 #include <assert.h>
 #include <limits.h>
+#include "../codec/cc.h"
 
 /*****************************************************************************
  * Module descriptor
@@ -482,6 +483,7 @@ static block_t * MP4_EIA608_Convert( block_t * p_block )
 
     block_Release( p_block );
     p_newblock->i_buffer = i_copied;
+    p_newblock->i_flags = BLOCK_FLAG_ORDERED_CAPTIONS;
     return p_newblock;
 }