demux: smooth: patch moof sequence with sequence number

regression after 1a7915a5

modules/demux/smooth/mp4/IndexReader.cpp

@@ -36,12 +36,18 @@ IndexReader::IndexReader(vlc_object_t *obj)
 {
 }
 
-bool IndexReader::parseIndex(block_t *p_block, BaseRepresentation *rep)
+bool IndexReader::parseIndex(block_t *p_block, BaseRepresentation *rep, uint64_t sequence)
 {
     if(!rep || !parseBlock(p_block))
         return false;
 
-    /* Do track ID fixup */
+    /* Fixup moof sequence as they do not monotonically increase
+       nor provide a way to have moof time on implicit discontinuity */
+    const MP4_Box_t *mfhd_box = MP4_BoxGet( rootbox, "moof/mfhd" );
+    if( mfhd_box )
+        SetDWBE( &p_block->p_buffer[mfhd_box->i_pos + 8 + 4], sequence );
+
+    /* Do track ID fixup, must match track #1 */
     const MP4_Box_t *tfhd_box = MP4_BoxGet( rootbox, "moof/traf/tfhd" );
     if ( tfhd_box )
         SetDWBE( &p_block->p_buffer[tfhd_box->i_pos + 8 + 4], 0x01 );

modules/demux/smooth/mp4/IndexReader.hpp

@@ -41,7 +41,7 @@ namespace smooth
         {
             public:
                 IndexReader(vlc_object_t *);
-                bool parseIndex(block_t *, BaseRepresentation *);
+                bool parseIndex(block_t *, BaseRepresentation *, uint64_t);
         };
     }
 }

modules/demux/smooth/playlist/SmoothSegment.cpp

@@ -49,7 +49,7 @@ void SmoothSegmentChunk::onDownload(block_t **pp_block)
         return;
 
     IndexReader br(rep->getPlaylist()->getVLCObject());
-    br.parseIndex(*pp_block, rep);
+    br.parseIndex(*pp_block, rep, sequence);
 
     /* If timeshift depth is present, we use it for expiring segments
        as we never update playlist itself */