]> git.sesse.net Git - vlc/blobdiff - modules/demux/mkv.cpp
mkv.cpp: handle missing linked segments (seg->missing->seg)
[vlc] / modules / demux / mkv.cpp
index 438a0f0853e956380d7e777c19329cfaf2a7ed0a..6513c8e3b33c8392be898a7566fa86fc2630a7b9 100644 (file)
@@ -56,6 +56,7 @@
 #include "ebml/EbmlStream.h"
 #include "ebml/EbmlContexts.h"
 #include "ebml/EbmlVoid.h"
+#include "ebml/EbmlVersion.h"
 #include "ebml/StdIOCallback.h"
 
 #include "matroska/KaxAttachments.h"
@@ -92,6 +93,8 @@ extern "C" {
 #define MATROSKA_COMPRESSION_NONE 0
 #define MATROSKA_COMPRESSION_ZLIB 1
 
+#define MKVD_TIMECODESCALE 1000000
+
 /**
  * What's between a directory and a filename?
  */
@@ -118,7 +121,15 @@ vlc_module_begin();
     set_category( CAT_INPUT );
     set_subcategory( SUBCAT_INPUT_DEMUX );
 
-    add_bool( "mkv-seek-percent", 1, NULL,
+    add_bool( "mkv-use-ordered-chapters", 1, NULL,
+            N_("Ordered chapters"),
+            N_("Play chapters in the specified order as specified in the file"), VLC_TRUE );
+
+    add_bool( "mkv-use-chapter-codec", 1, NULL,
+            N_("Chapter codecs"),
+            N_("Use chapter codecs found in the file"), VLC_TRUE );
+
+    add_bool( "mkv-seek-percent", 0, NULL,
             N_("Seek based on percent not time"),
             N_("Seek based on percent not time"), VLC_TRUE );
 
@@ -182,12 +193,12 @@ block_t *block_zlib_decompress( vlc_object_t *p_this, block_t *p_in_block ) {
 /**
  * Helper function to print the mkv parse tree
  */
-static void MkvTree( demux_t *p_this, int i_level, char *psz_format, ... )
+static void MkvTree( demux_t & demuxer, int i_level, char *psz_format, ... )
 {
     va_list args;
     if( i_level > 9 )
     {
-        msg_Err( p_this, "too deep tree" );
+        msg_Err( &demuxer, "too deep tree" );
         return;
     }
     va_start( args, psz_format );
@@ -197,7 +208,7 @@ static void MkvTree( demux_t *p_this, int i_level, char *psz_format, ... )
     psz_foo2[ 4 * i_level ] = '+';
     psz_foo2[ 4 * i_level + 1 ] = ' ';
     strcpy( &psz_foo2[ 4 * i_level + 2 ], psz_format );
-    __msg_GenericVa( VLC_OBJECT(p_this), VLC_MSG_DBG, "mkv", psz_foo2, args );
+    __msg_GenericVa( VLC_OBJECT(&demuxer), VLC_MSG_DBG, "mkv", psz_foo2, args );
     free( psz_foo2 );
     va_end( args );
 }
@@ -232,6 +243,7 @@ class EbmlParser
 
     void Up( void );
     void Down( void );
+    void Reset( void );
     EbmlElement *Get( void );
     void        Keep( void );
 
@@ -263,12 +275,12 @@ static vlc_fourcc_t __GetFOURCC( uint8_t *p )
  *****************************************************************************/
 typedef struct
 {
-    vlc_bool_t  b_default;
-    vlc_bool_t  b_enabled;
-    int         i_number;
+    vlc_bool_t   b_default;
+    vlc_bool_t   b_enabled;
+    unsigned int i_number;
 
-    int         i_extra_data;
-    uint8_t     *p_extra_data;
+    int          i_extra_data;
+    uint8_t      *p_extra_data;
 
     char         *psz_codec;
 
@@ -287,6 +299,7 @@ typedef struct
 
     /* hack : it's for seek */
     vlc_bool_t      b_search_keyframe;
+    vlc_bool_t      b_silent;
 
     /* informative */
     char         *psz_codec_name;
@@ -362,43 +375,87 @@ public:
     bool                        b_ordered;
 };
 
-class demux_sys_t
+class demux_sys_t;
+
+class matroska_segment_t
 {
 public:
-    demux_sys_t()
-        :in(NULL)
-        ,es(NULL)
-        ,ep(NULL)
-        ,i_timescale(0)
-        ,f_duration(0.0)
-        ,i_track(0)
-        ,track(NULL)
-        ,i_cues_position(0)
-        ,i_chapters_position(0)
-        ,i_tags_position(0)
-        ,segment(NULL)
+    matroska_segment_t( demux_sys_t & demuxer, EbmlStream & estream )
+        :segment(NULL)
+        ,es(estream)
+        ,i_timescale(MKVD_TIMECODESCALE)
+        ,f_duration(-1.0)
+        ,i_cues_position(-1)
+        ,i_chapters_position(-1)
+        ,i_tags_position(-1)
         ,cluster(NULL)
-        ,i_pts(0)
-        ,i_start_pts(0)
-        ,i_chapter_time(0)
-        ,b_cues(false)
+        ,i_start_pos(0)
+        ,b_cues(VLC_FALSE)
         ,i_index(0)
-        ,i_index_max(0)
-        ,index(NULL)
+        ,i_index_max(1024)
         ,psz_muxing_application(NULL)
         ,psz_writing_application(NULL)
         ,psz_segment_filename(NULL)
         ,psz_title(NULL)
         ,psz_date_utc(NULL)
-        ,meta(NULL)
-        ,title(NULL)
-        ,i_current_edition(0)
+        ,i_current_edition(-1)
         ,psz_current_chapter(NULL)
-    {}
+        ,sys(demuxer)
+        ,ep(NULL)
+        ,b_preloaded(false)
+    {
+        index = (mkv_index_t*)malloc( sizeof( mkv_index_t ) * i_index_max );
+    }
+
+    ~matroska_segment_t()
+    {
+        for( size_t i_track = 0; i_track < tracks.size(); i_track++ )
+        {
+#define tk  tracks[i_track]
+            if( tk->fmt.psz_description )
+            {
+                free( tk->fmt.psz_description );
+            }
+            if( tk->psz_codec )
+            {
+                free( tk->psz_codec );
+            }
+            if( tk->fmt.psz_language )
+            {
+                free( tk->fmt.psz_language );
+            }
+            delete tk;
+#undef tk
+        }
+        
+        if( psz_writing_application )
+        {
+            free( psz_writing_application );
+        }
+        if( psz_muxing_application )
+        {
+            free( psz_muxing_application );
+        }
+        if( psz_segment_filename )
+        {
+            free( psz_segment_filename );
+        }
+        if( psz_title )
+        {
+            free( psz_title );
+        }
+        if( psz_date_utc )
+        {
+            free( psz_date_utc );
+        }
+        if ( index )
+            free( index );
+
+        delete ep;
+    }
 
-    vlc_stream_io_callback  *in;
-    EbmlStream              *es;
-    EbmlParser              *ep;
+    KaxSegment              *segment;
+    EbmlStream              & es;
 
     /* time scale */
     uint64_t                i_timescale;
@@ -407,22 +464,18 @@ public:
     float                   f_duration;
 
     /* all tracks */
-    int                     i_track;
-    mkv_track_t             *track;
+    std::vector<mkv_track_t*> tracks;
 
     /* from seekhead */
     int64_t                 i_cues_position;
     int64_t                 i_chapters_position;
     int64_t                 i_tags_position;
 
-    /* current data */
-    KaxSegment              *segment;
     KaxCluster              *cluster;
+    int64_t                 i_start_pos;
     KaxSegmentUID           segment_uid;
-
-    mtime_t                 i_pts;
-    mtime_t                 i_start_pts;
-    mtime_t                 i_chapter_time;
+    KaxPrevUID              prev_segment_uid;
+    KaxNextUID              next_segment_uid;
 
     vlc_bool_t              b_cues;
     int                     i_index;
@@ -436,181 +489,231 @@ public:
     char                    *psz_title;
     char                    *psz_date_utc;
 
+    std::vector<chapter_edition_t> editions;
+    int                            i_current_edition;
+    const chapter_item_t           *psz_current_chapter;
+
+    std::vector<KaxSegmentFamily>  families;
+    
+    demux_sys_t                    & sys;
+    EbmlParser                     *ep;
+    bool                           b_preloaded;
+
+    inline chapter_edition_t *Edition()
+    {
+        if ( i_current_edition >= 0 && size_t(i_current_edition) < editions.size() )
+            return &editions[i_current_edition];
+        return NULL;
+    }
+
+    bool Preload( );
+    bool PreloadFamily( const matroska_segment_t & segment );
+    void ParseInfo( EbmlElement *info );
+    void ParseChapters( EbmlElement *chapters );
+    void ParseSeekHead( EbmlElement *seekhead );
+    void ParseTracks( EbmlElement *tracks );
+    void ParseChapterAtom( int i_level, EbmlMaster *ca, chapter_item_t & chapters );
+    void ParseTrackEntry( EbmlMaster *m );
+    void IndexAppendCluster( KaxCluster *cluster );
+    void LoadCues( );
+    void LoadTags( );
+    void InformationCreate( );
+    int BlockGet( KaxBlock **pp_block, int64_t *pi_ref1, int64_t *pi_ref2, int64_t *pi_duration );
+    bool Select( mtime_t i_start_time );
+    void UnSelect( );
+    static bool CompareSegmentUIDs( const matroska_segment_t * item_a, const matroska_segment_t * item_b );
+};
+
+// class holding hard-linked segment together in the playback order
+class virtual_segment_t
+{
+public:
+    virtual_segment_t( matroska_segment_t *p_segment )
+        :i_current_segment(0)
+    {
+        linked_segments.push_back( p_segment );
+
+        AppendUID( p_segment->segment_uid );
+        AppendUID( p_segment->prev_segment_uid );
+        AppendUID( p_segment->next_segment_uid );
+    }
+
+    void Sort();
+    size_t AddSegment( matroska_segment_t *p_segment );
+    void PreloadLinked( );
+    float Duration( ) const;
+    void LoadCues( );
+
+    matroska_segment_t * Segment() const
+    {
+        if ( linked_segments.size() == 0 || i_current_segment >= linked_segments.size() )
+            return NULL;
+        return linked_segments[i_current_segment];
+    }
+
+    bool SelectNext()
+    {
+        if ( i_current_segment < linked_segments.size()-1 )
+        {
+            i_current_segment++;
+            return true;
+        }
+        return false;
+    }
+
+protected:
+    std::vector<matroska_segment_t*> linked_segments;
+    std::vector<const KaxSegmentUID> linked_uids;
+    size_t                           i_current_segment;
+
+    void                             AppendUID( const EbmlBinary & UID );
+};
+
+class matroska_stream_t
+{
+public:
+    matroska_stream_t( demux_sys_t & demuxer )
+        :p_in(NULL)
+        ,p_es(NULL)
+        ,sys(demuxer)
+    {}
+
+    ~matroska_stream_t()
+    {
+        delete p_in;
+        delete p_es;
+    }
+
+    IOCallback         *p_in;
+    EbmlStream         *p_es;
+
+    std::vector<matroska_segment_t*> segments;
+
+    demux_sys_t                      & sys;
+
+    void PreloadFamily( const matroska_segment_t & segment );
+};
+
+class demux_sys_t
+{
+public:
+    demux_sys_t( demux_t & demux )
+        :demuxer(demux)
+        ,i_pts(0)
+        ,i_start_pts(0)
+        ,i_chapter_time(0)
+        ,meta(NULL)
+        ,title(NULL)
+        ,p_current_segment(NULL)
+        ,f_duration(-1.0)
+    {}
+
+    ~demux_sys_t()
+    {
+        for (size_t i=0; i<streams.size(); i++)
+            delete streams[i];
+        for ( size_t i=0; i<opened_segments.size(); i++ )
+            delete opened_segments[i];
+    }
+
+    /* current data */
+    demux_t                 & demuxer;
+
+    mtime_t                 i_pts;
+    mtime_t                 i_start_pts;
+    mtime_t                 i_chapter_time;
+
     vlc_meta_t              *meta;
 
     input_title_t           *title;
 
-    std::vector<KaxSegmentFamily> families;
-    std::vector<KaxSegment*>      family_members;
-    
-    std::vector<chapter_edition_t> editions;
-    int                            i_current_edition;
-    const chapter_item_t           *psz_current_chapter;
+    std::vector<matroska_stream_t*>  streams;
+    std::vector<matroska_segment_t*> opened_segments;
+    virtual_segment_t                *p_current_segment;
+
+    /* duration of the stream */
+    float                   f_duration;
+
+    matroska_segment_t *FindSegment( const EbmlBinary & uid ) const;
+    void PreloadFamily( );
+    void PreloadLinked( matroska_segment_t *p_segment );
+    void PreparePlayback( );
+    matroska_stream_t *AnalyseAllSegmentsFound( EbmlStream *p_estream );
 };
 
 static int  Demux  ( demux_t * );
 static int  Control( demux_t *, int, va_list );
 static void Seek   ( demux_t *, mtime_t i_date, double f_percent, const chapter_item_t *psz_chapter );
 
-#define MKVD_TIMECODESCALE 1000000
-
 #define MKV_IS_ID( el, C ) ( EbmlId( (*el) ) == C::ClassInfos.GlobalId )
 
-static void IndexAppendCluster  ( demux_t *p_demux, KaxCluster *cluster );
 static char *UTF8ToStr          ( const UTFstring &u );
-static void LoadCues            ( demux_t * );
-static void InformationCreate  ( demux_t * );
-
-static void ParseInfo( demux_t *, EbmlElement *info );
-static void ParseTracks( demux_t *, EbmlElement *tracks );
-static void ParseSeekHead( demux_t *, EbmlElement *seekhead );
-static void ParseChapters( demux_t *, EbmlElement *chapters );
 
 /*****************************************************************************
  * Open: initializes matroska demux structures
  *****************************************************************************/
 static int Open( vlc_object_t * p_this )
 {
-    demux_t     *p_demux = (demux_t*)p_this;
-    demux_sys_t *p_sys;
-    uint8_t     *p_peek;
-    std::string  s_path, s_filename;
-    int          i_upper_lvl;
-    size_t       i;
-
-    int          i_track;
-
-    EbmlElement *el = NULL, *el1 = NULL;
+    demux_t            *p_demux = (demux_t*)p_this;
+    demux_sys_t        *p_sys;
+    matroska_stream_t  *p_stream;
+    matroska_segment_t *p_segment;
+    uint8_t            *p_peek;
+    std::string        s_path, s_filename;
+    vlc_stream_io_callback *p_io_callback;
+    EbmlStream         *p_io_stream;
 
     /* peek the begining */
-    if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 )
-    {
-        msg_Warn( p_demux, "cannot peek" );
-        return VLC_EGENERIC;
-    }
+    if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 ) return VLC_EGENERIC;
 
     /* is a valid file */
     if( p_peek[0] != 0x1a || p_peek[1] != 0x45 ||
-        p_peek[2] != 0xdf || p_peek[3] != 0xa3 )
-    {
-        msg_Warn( p_demux, "matroska module discarded "
-                           "(invalid header 0x%.2x%.2x%.2x%.2x)",
-                           p_peek[0], p_peek[1], p_peek[2], p_peek[3] );
-        return VLC_EGENERIC;
-    }
+        p_peek[2] != 0xdf || p_peek[3] != 0xa3 ) return VLC_EGENERIC;
 
     /* Set the demux function */
     p_demux->pf_demux   = Demux;
     p_demux->pf_control = Control;
-    p_demux->p_sys      = p_sys = new demux_sys_t;
-
-    p_sys->in = new vlc_stream_io_callback( p_demux->s );
-    p_sys->es = new EbmlStream( *p_sys->in );
-    p_sys->f_duration   = -1;
-    p_sys->i_timescale     = MKVD_TIMECODESCALE;
-    p_sys->i_track      = 0;
-    p_sys->track        = (mkv_track_t*)malloc( sizeof( mkv_track_t ) );
-    p_sys->i_pts   = 0;
-    p_sys->i_cues_position = -1;
-    p_sys->i_chapters_position = -1;
-    p_sys->i_tags_position = -1;
-
-    p_sys->b_cues       = VLC_FALSE;
-    p_sys->i_index      = 0;
-    p_sys->i_index_max  = 1024;
-    p_sys->index        = (mkv_index_t*)malloc( sizeof( mkv_index_t ) *
-                                                p_sys->i_index_max );
-
-    p_sys->psz_muxing_application = NULL;
-    p_sys->psz_writing_application = NULL;
-    p_sys->psz_segment_filename = NULL;
-    p_sys->psz_title = NULL;
-    p_sys->psz_date_utc = NULL;;
-    p_sys->meta = NULL;
-    p_sys->title = NULL;
-
-    if( p_sys->es == NULL )
+    p_demux->p_sys      = p_sys = new demux_sys_t( *p_demux );
+
+    p_io_callback = new vlc_stream_io_callback( p_demux->s );
+    p_io_stream = new EbmlStream( *p_io_callback );
+
+    if( p_io_stream == NULL )
     {
         msg_Err( p_demux, "failed to create EbmlStream" );
-        delete p_sys->in;
+        delete p_io_callback;
         delete p_sys;
         return VLC_EGENERIC;
     }
-    /* Find the EbmlHead element */
-    el = p_sys->es->FindNextID(EbmlHead::ClassInfos, 0xFFFFFFFFL);
-    if( el == NULL )
-    {
-        msg_Err( p_demux, "cannot find EbmlHead" );
-        goto error;
-    }
-    msg_Dbg( p_demux, "EbmlHead" );
-    /* skip it */
-    el->SkipData( *p_sys->es, el->Generic().Context );
-    delete el;
 
-    /* Find a segment */
-    el = p_sys->es->FindNextID( KaxSegment::ClassInfos, 0xFFFFFFFFL);
-    if( el == NULL )
+    p_stream = p_sys->AnalyseAllSegmentsFound( p_io_stream );
+    if( p_stream == NULL )
     {
         msg_Err( p_demux, "cannot find KaxSegment" );
         goto error;
     }
-    MkvTree( p_demux, 0, "Segment" );
-    p_sys->segment = (KaxSegment*)el;
-    p_sys->cluster = NULL;
+    p_sys->streams.push_back( p_stream );
 
-    p_sys->ep = new EbmlParser( p_sys->es, el );
+    p_stream->p_in = p_io_callback;
+    p_stream->p_es = p_io_stream;
 
-    while( ( el1 = p_sys->ep->Get() ) != NULL )
+    for (size_t i=0; i<p_stream->segments.size(); i++)
     {
-        if( MKV_IS_ID( el1, KaxInfo ) )
-        {
-            ParseInfo( p_demux, el1 );
-        }
-        else if( MKV_IS_ID( el1, KaxTracks ) )
-        {
-            ParseTracks( p_demux, el1 );
-        }
-        else if( MKV_IS_ID( el1, KaxSeekHead ) )
-        {
-            ParseSeekHead( p_demux, el1 );
-        }
-        else if( MKV_IS_ID( el1, KaxCues ) )
-        {
-            msg_Dbg( p_demux, "|   + Cues" );
-        }
-        else if( MKV_IS_ID( el1, KaxCluster ) )
-        {
-            msg_Dbg( p_demux, "|   + Cluster" );
-
-            p_sys->cluster = (KaxCluster*)el1;
+        p_stream->segments[i]->Preload();
+    }
 
-            p_sys->ep->Down();
-            /* stop parsing the stream */
-            break;
-        }
-        else if( MKV_IS_ID( el1, KaxAttachments ) )
-        {
-            msg_Dbg( p_demux, "|   + Attachments FIXME TODO (but probably never supported)" );
-        }
-        else if( MKV_IS_ID( el1, KaxChapters ) )
-        {
-            msg_Dbg( p_demux, "|   + Chapters" );
-            ParseChapters( p_demux, el1 );
-        }
-        else if( MKV_IS_ID( el1, KaxTag ) )
-        {
-            msg_Dbg( p_demux, "|   + Tags FIXME TODO" );
-        }
-        else
-        {
-            msg_Dbg( p_demux, "|   + Unknown (%s)", typeid(*el1).name() );
-        }
+    p_segment = p_stream->segments[0];
+    if( p_segment->cluster == NULL )
+    {
+        msg_Err( p_demux, "cannot find any cluster, damaged file ?" );
+        goto error;
     }
+    // reset the stream reading to the first cluster of the segment used
+    p_stream->p_in->setFilePointer( p_segment->cluster->GetElementPosition() );
 
     /* get the files from the same dir from the same family (based on p_demux->psz_path) */
-    /* _todo_ handle multi-segment files */
-    if (p_demux->psz_path[0] != '\0' && (!strcmp(p_demux->psz_access, "") || !strcmp(p_demux->psz_access, "")))
+    /* TODO handle multi-segment files */
+    if (p_demux->psz_path[0] != '\0' && !strcmp(p_demux->psz_access, ""))
     {
         // assume it's a regular file
         // get the directory path
@@ -639,7 +742,7 @@ static int Open( vlc_object_t * p_this )
                     s_filename = s_path + DIRECTORY_SEPARATOR + p_file_item->d_name;
 
                     if (!s_filename.compare(p_demux->psz_path))
-                        continue;
+                        continue; // don't reuse the original opened file
 
 #if defined(__GNUC__) && (__GNUC__ < 3)
                     if (!s_filename.compare("mkv", s_filename.length() - 3, 3) || 
@@ -650,96 +753,21 @@ static int Open( vlc_object_t * p_this )
 #endif
                     {
                         // test wether this file belongs to the our family
-                        bool b_keep_file_opened = false;
                         StdIOCallback *p_file_io = new StdIOCallback(s_filename.c_str(), MODE_READ);
-                        EbmlStream *p_stream = new EbmlStream(*p_file_io);
-                        EbmlElement *p_l0, *p_l1, *p_l2;
+                        EbmlStream *p_estream = new EbmlStream(*p_file_io);
 
-                        // verify the EBML Header
-                        p_l0 = p_stream->FindNextID(EbmlHead::ClassInfos, 0xFFFFFFFFL);
-                        if (p_l0 == NULL)
+                        p_stream = p_sys->AnalyseAllSegmentsFound( p_estream );
+                        if ( p_stream == NULL )
                         {
-                            delete p_stream;
+                            msg_Dbg( p_demux, "the file '%s' will not be used", s_filename.c_str() );
+                            delete p_estream;
                             delete p_file_io;
-                            continue;
                         }
-
-                        p_l0->SkipData(*p_stream, EbmlHead_Context);
-                        delete p_l0;
-
-                        // find all segments in this file
-                        p_l0 = p_stream->FindNextID(KaxSegment::ClassInfos, 0xFFFFFFFFL);
-                        if (p_l0 == NULL)
-                        {
-                            delete p_stream;
-                            delete p_file_io;
-                            continue;
-                        }
-
-                        i_upper_lvl = 0;
-
-                        while (p_l0 != 0)
-                        {
-                            if (EbmlId(*p_l0) == KaxSegment::ClassInfos.GlobalId)
-                            {
-                                EbmlParser  *ep;
-                                KaxSegmentUID *p_uid = NULL;
-
-                                ep = new EbmlParser(p_stream, p_l0);
-                                bool b_this_segment_matches = false;
-                                while ((p_l1 = ep->Get()))
-                                {
-                                    if (MKV_IS_ID(p_l1, KaxInfo))
-                                    {
-                                        // find the families of this segment
-                                        KaxInfo *p_info = static_cast<KaxInfo*>(p_l1);
-
-                                        p_info->Read(*p_stream, KaxInfo::ClassInfos.Context, i_upper_lvl, p_l2, true);
-                                        for( i = 0; i < p_info->ListSize() && !b_this_segment_matches; i++ )
-                                        {
-                                            EbmlElement *l = (*p_info)[i];
-
-                                            if( MKV_IS_ID( l, KaxSegmentUID ) )
-                                            {
-                                                p_uid = static_cast<KaxSegmentUID*>(l);
-                                                if (p_sys->segment_uid == *p_uid)
-                                                    break;
-                                            }
-                                            else if( MKV_IS_ID( l, KaxSegmentFamily ) )
-                                            {
-                                                KaxSegmentFamily *p_fam = static_cast<KaxSegmentFamily*>(l);
-                                                std::vector<KaxSegmentFamily>::iterator iter;
-                                                for( iter = p_sys->families.begin();
-                                                     iter != p_sys->families.end();
-                                                     iter++ )
-                                                {
-                                                    if( *iter == *p_fam )
-                                                    {
-                                                        b_this_segment_matches = true;
-                                                        break;
-                                                    }
-                                                }
-                                            }
-                                        }
-                                        break;
-                                    }
-                                }
-
-                                if (b_this_segment_matches)
-                                {
-                                    b_keep_file_opened = true;
-                                }
-                            }
-
-                            p_l0->SkipData(*p_stream, EbmlHead_Context);
-                            delete p_l0;
-                            p_l0 = p_stream->FindNextID(KaxSegment::ClassInfos, 0xFFFFFFFFL);
-                        }
-
-                        if (!b_keep_file_opened)
+                        else
                         {
-                            delete p_stream;
-                            delete p_file_io;
+                            p_stream->p_in = p_file_io;
+                            p_stream->p_es = p_estream;
+                            p_sys->streams.push_back( p_stream );
                         }
                     }
                 }
@@ -748,415 +776,80 @@ static int Open( vlc_object_t * p_this )
         }
     }
 
+    p_sys->PreloadFamily( );
+    p_sys->PreloadLinked( p_segment );
+    p_sys->PreparePlayback( );
 
-    if( p_sys->cluster == NULL )
+    if( !p_segment->b_cues || p_segment->i_index <= 0 )
     {
-        msg_Err( p_demux, "cannot find any cluster, damaged file ?" );
-        goto error;
-    }
+        msg_Warn( p_demux, "no cues/empty cues found->seek won't be precise" );
 
-    /* *** Load the cue if found *** */
-    if( p_sys->i_cues_position >= 0 )
-    {
-        vlc_bool_t b_seekable;
+        p_segment->IndexAppendCluster( p_segment->cluster );
 
-        stream_Control( p_demux->s, STREAM_CAN_FASTSEEK, &b_seekable );
-        if( b_seekable )
-        {
-            LoadCues( p_demux );
-        }
+        p_segment->b_cues = VLC_FALSE;
     }
 
-    if( !p_sys->b_cues || p_sys->i_index <= 0 )
+    /* add information */
+    p_segment->InformationCreate( );
+
+    if ( !p_segment->Select( 0 ) )
     {
-        msg_Warn( p_demux, "no cues/empty cues found->seek won't be precise" );
+        msg_Err( p_demux, "cannot use the segment" );
+        goto error;
+    }
+    
+    return VLC_SUCCESS;
 
-        IndexAppendCluster( p_demux, p_sys->cluster );
+error:
+    delete p_sys;
+    return VLC_EGENERIC;
+}
 
-        p_sys->b_cues = VLC_FALSE;
-    }
+/*****************************************************************************
+ * Close: frees unused data
+ *****************************************************************************/
+static void Close( vlc_object_t *p_this )
+{
+    demux_t     *p_demux = (demux_t*)p_this;
+    demux_sys_t *p_sys   = p_demux->p_sys;
 
-    /* add all es */
-    msg_Dbg( p_demux, "found %d es", p_sys->i_track );
-    for( i_track = 0; i_track < p_sys->i_track; i_track++ )
+    delete p_sys;
+}
+
+/*****************************************************************************
+ * Control:
+ *****************************************************************************/
+static int Control( demux_t *p_demux, int i_query, va_list args )
+{
+    demux_sys_t        *p_sys = p_demux->p_sys;
+    matroska_segment_t *p_segment = p_sys->p_current_segment->Segment();
+    int64_t     *pi64;
+    double      *pf, f;
+    int         i_skp;
+
+    vlc_meta_t **pp_meta;
+
+    switch( i_query )
     {
-#define tk  p_sys->track[i_track]
-        if( tk.fmt.i_cat == UNKNOWN_ES )
-        {
-            msg_Warn( p_demux, "invalid track[%d, n=%d]", i_track, tk.i_number );
-            tk.p_es = NULL;
-            continue;
-        }
+        case DEMUX_GET_META:
+            pp_meta = (vlc_meta_t**)va_arg( args, vlc_meta_t** );
+            *pp_meta = vlc_meta_Duplicate( p_sys->meta );
+            return VLC_SUCCESS;
 
-        if( !strcmp( tk.psz_codec, "V_MS/VFW/FOURCC" ) )
-        {
-            if( tk.i_extra_data < (int)sizeof( BITMAPINFOHEADER ) )
+        case DEMUX_GET_LENGTH:
+            pi64 = (int64_t*)va_arg( args, int64_t * );
+            if( p_sys->f_duration > 0.0 )
             {
-                msg_Err( p_demux, "missing/invalid BITMAPINFOHEADER" );
-                tk.fmt.i_codec = VLC_FOURCC( 'u', 'n', 'd', 'f' );
+                *pi64 = (int64_t)(p_sys->f_duration * 1000);
+                return VLC_SUCCESS;
             }
-            else
-            {
-                BITMAPINFOHEADER *p_bih = (BITMAPINFOHEADER*)tk.p_extra_data;
+            return VLC_EGENERIC;
 
-                tk.fmt.video.i_width = GetDWLE( &p_bih->biWidth );
-                tk.fmt.video.i_height= GetDWLE( &p_bih->biHeight );
-                tk.fmt.i_codec       = GetFOURCC( &p_bih->biCompression );
-
-                tk.fmt.i_extra       = GetDWLE( &p_bih->biSize ) - sizeof( BITMAPINFOHEADER );
-                if( tk.fmt.i_extra > 0 )
-                {
-                    tk.fmt.p_extra = malloc( tk.fmt.i_extra );
-                    memcpy( tk.fmt.p_extra, &p_bih[1], tk.fmt.i_extra );
-                }
-            }
-        }
-        else if( !strcmp( tk.psz_codec, "V_MPEG1" ) ||
-                 !strcmp( tk.psz_codec, "V_MPEG2" ) )
-        {
-            tk.fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'v' );
-        }
-        else if( !strncmp( tk.psz_codec, "V_MPEG4", 7 ) )
-        {
-            if( !strcmp( tk.psz_codec, "V_MPEG4/MS/V3" ) )
-            {
-                tk.fmt.i_codec = VLC_FOURCC( 'D', 'I', 'V', '3' );
-            }
-            else if( !strcmp( tk.psz_codec, "V_MPEG4/ISO/AVC" ) )
-            {
-                tk.fmt.i_codec = VLC_FOURCC( 'a', 'v', 'c', '1' );
-                tk.fmt.b_packetized = VLC_FALSE;
-                tk.fmt.i_extra = tk.i_extra_data;
-                tk.fmt.p_extra = malloc( tk.i_extra_data );
-                memcpy( tk.fmt.p_extra,tk.p_extra_data, tk.i_extra_data );
-            }
-            else
-            {
-                tk.fmt.i_codec = VLC_FOURCC( 'm', 'p', '4', 'v' );
-            }
-        }
-        else if( !strcmp( tk.psz_codec, "V_QUICKTIME" ) )
-        {
-            MP4_Box_t *p_box = (MP4_Box_t*)malloc( sizeof( MP4_Box_t ) );
-            stream_t *p_mp4_stream = stream_MemoryNew( VLC_OBJECT(p_demux),
-                                                       tk.p_extra_data,
-                                                       tk.i_extra_data );
-            MP4_ReadBoxCommon( p_mp4_stream, p_box );
-            MP4_ReadBox_sample_vide( p_mp4_stream, p_box );
-            tk.fmt.i_codec = p_box->i_type;
-            tk.fmt.video.i_width = p_box->data.p_sample_vide->i_width;
-            tk.fmt.video.i_height = p_box->data.p_sample_vide->i_height;
-            tk.fmt.i_extra = p_box->data.p_sample_vide->i_qt_image_description;
-            tk.fmt.p_extra = malloc( tk.fmt.i_extra );
-            memcpy( tk.fmt.p_extra, p_box->data.p_sample_vide->p_qt_image_description, tk.fmt.i_extra );
-            MP4_FreeBox_sample_vide( p_box );
-            stream_MemoryDelete( p_mp4_stream, VLC_TRUE );
-        }
-        else if( !strcmp( tk.psz_codec, "A_MS/ACM" ) )
-        {
-            if( tk.i_extra_data < (int)sizeof( WAVEFORMATEX ) )
-            {
-                msg_Err( p_demux, "missing/invalid WAVEFORMATEX" );
-                tk.fmt.i_codec = VLC_FOURCC( 'u', 'n', 'd', 'f' );
-            }
-            else
-            {
-                WAVEFORMATEX *p_wf = (WAVEFORMATEX*)tk.p_extra_data;
-
-                wf_tag_to_fourcc( GetWLE( &p_wf->wFormatTag ), &tk.fmt.i_codec, NULL );
-
-                tk.fmt.audio.i_channels   = GetWLE( &p_wf->nChannels );
-                tk.fmt.audio.i_rate = GetDWLE( &p_wf->nSamplesPerSec );
-                tk.fmt.i_bitrate    = GetDWLE( &p_wf->nAvgBytesPerSec ) * 8;
-                tk.fmt.audio.i_blockalign = GetWLE( &p_wf->nBlockAlign );;
-                tk.fmt.audio.i_bitspersample = GetWLE( &p_wf->wBitsPerSample );
-
-                tk.fmt.i_extra            = GetWLE( &p_wf->cbSize );
-                if( tk.fmt.i_extra > 0 )
-                {
-                    tk.fmt.p_extra = malloc( tk.fmt.i_extra );
-                    memcpy( tk.fmt.p_extra, &p_wf[1], tk.fmt.i_extra );
-                }
-            }
-        }
-        else if( !strcmp( tk.psz_codec, "A_MPEG/L3" ) ||
-                 !strcmp( tk.psz_codec, "A_MPEG/L2" ) ||
-                 !strcmp( tk.psz_codec, "A_MPEG/L1" ) )
-        {
-            tk.fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'a' );
-        }
-        else if( !strcmp( tk.psz_codec, "A_AC3" ) )
-        {
-            tk.fmt.i_codec = VLC_FOURCC( 'a', '5', '2', ' ' );
-        }
-        else if( !strcmp( tk.psz_codec, "A_DTS" ) )
-        {
-            tk.fmt.i_codec = VLC_FOURCC( 'd', 't', 's', ' ' );
-        }
-        else if( !strcmp( tk.psz_codec, "A_FLAC" ) )
-        {
-            tk.fmt.i_codec = VLC_FOURCC( 'f', 'l', 'a', 'c' );
-            tk.fmt.i_extra = tk.i_extra_data;
-            tk.fmt.p_extra = malloc( tk.i_extra_data );
-            memcpy( tk.fmt.p_extra,tk.p_extra_data, tk.i_extra_data );
-        }
-        else if( !strcmp( tk.psz_codec, "A_VORBIS" ) )
-        {
-            int i, i_offset = 1, i_size[3], i_extra;
-            uint8_t *p_extra;
-
-            tk.fmt.i_codec = VLC_FOURCC( 'v', 'o', 'r', 'b' );
-
-            /* Split the 3 headers */
-            if( tk.p_extra_data[0] != 0x02 )
-                msg_Err( p_demux, "invalid vorbis header" );
-
-            for( i = 0; i < 2; i++ )
-            {
-                i_size[i] = 0;
-                while( i_offset < tk.i_extra_data )
-                {
-                    i_size[i] += tk.p_extra_data[i_offset];
-                    if( tk.p_extra_data[i_offset++] != 0xff ) break;
-                }
-            }
-
-            i_size[0] = __MIN(i_size[0], tk.i_extra_data - i_offset);
-            i_size[1] = __MIN(i_size[1], tk.i_extra_data -i_offset -i_size[0]);
-            i_size[2] = tk.i_extra_data - i_offset - i_size[0] - i_size[1];
-
-            tk.fmt.i_extra = 3 * 2 + i_size[0] + i_size[1] + i_size[2];
-            tk.fmt.p_extra = malloc( tk.fmt.i_extra );
-            p_extra = (uint8_t *)tk.fmt.p_extra; i_extra = 0;
-            for( i = 0; i < 3; i++ )
-            {
-                *(p_extra++) = i_size[i] >> 8;
-                *(p_extra++) = i_size[i] & 0xFF;
-                memcpy( p_extra, tk.p_extra_data + i_offset + i_extra,
-                        i_size[i] );
-                p_extra += i_size[i];
-                i_extra += i_size[i];
-            }
-        }
-        else if( !strncmp( tk.psz_codec, "A_AAC/MPEG2/", strlen( "A_AAC/MPEG2/" ) ) ||
-                 !strncmp( tk.psz_codec, "A_AAC/MPEG4/", strlen( "A_AAC/MPEG4/" ) ) )
-        {
-            int i_profile, i_srate;
-            static unsigned int i_sample_rates[] =
-            {
-                    96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050,
-                        16000, 12000, 11025, 8000,  7350,  0,     0,     0
-            };
-
-            tk.fmt.i_codec = VLC_FOURCC( 'm', 'p', '4', 'a' );
-            /* create data for faad (MP4DecSpecificDescrTag)*/
-
-            if( !strcmp( &tk.psz_codec[12], "MAIN" ) )
-            {
-                i_profile = 0;
-            }
-            else if( !strcmp( &tk.psz_codec[12], "LC" ) )
-            {
-                i_profile = 1;
-            }
-            else if( !strcmp( &tk.psz_codec[12], "SSR" ) )
-            {
-                i_profile = 2;
-            }
-            else
-            {
-                i_profile = 3;
-            }
-
-            for( i_srate = 0; i_srate < 13; i_srate++ )
-            {
-                if( i_sample_rates[i_srate] == tk.fmt.audio.i_rate )
-                {
-                    break;
-                }
-            }
-            msg_Dbg( p_demux, "profile=%d srate=%d", i_profile, i_srate );
-
-            tk.fmt.i_extra = 2;
-            tk.fmt.p_extra = malloc( tk.fmt.i_extra );
-            ((uint8_t*)tk.fmt.p_extra)[0] = ((i_profile + 1) << 3) | ((i_srate&0xe) >> 1);
-            ((uint8_t*)tk.fmt.p_extra)[1] = ((i_srate & 0x1) << 7) | (tk.fmt.audio.i_channels << 3);
-        }
-        else if( !strcmp( tk.psz_codec, "A_PCM/INT/BIG" ) ||
-                 !strcmp( tk.psz_codec, "A_PCM/INT/LIT" ) ||
-                 !strcmp( tk.psz_codec, "A_PCM/FLOAT/IEEE" ) )
-        {
-            if( !strcmp( tk.psz_codec, "A_PCM/INT/BIG" ) )
-            {
-                tk.fmt.i_codec = VLC_FOURCC( 't', 'w', 'o', 's' );
-            }
-            else
-            {
-                tk.fmt.i_codec = VLC_FOURCC( 'a', 'r', 'a', 'w' );
-            }
-            tk.fmt.audio.i_blockalign = ( tk.fmt.audio.i_bitspersample + 7 ) / 8 * tk.fmt.audio.i_channels;
-        }
-        else if( !strcmp( tk.psz_codec, "A_TTA1" ) )
-        {
-            /* FIXME: support this codec */
-            msg_Err( p_demux, "TTA not supported yet[%d, n=%d]", i_track, tk.i_number );
-            tk.fmt.i_codec = VLC_FOURCC( 'u', 'n', 'd', 'f' );
-        }
-        else if( !strcmp( tk.psz_codec, "A_WAVPACK4" ) )
-        {
-            /* FIXME: support this codec */
-            msg_Err( p_demux, "Wavpack not supported yet[%d, n=%d]", i_track, tk.i_number );
-            tk.fmt.i_codec = VLC_FOURCC( 'u', 'n', 'd', 'f' );
-        }
-        else if( !strcmp( tk.psz_codec, "S_TEXT/UTF8" ) )
-        {
-            tk.fmt.i_codec = VLC_FOURCC( 's', 'u', 'b', 't' );
-            tk.fmt.subs.psz_encoding = strdup( "UTF-8" );
-        }
-        else if( !strcmp( tk.psz_codec, "S_TEXT/SSA" ) ||
-                 !strcmp( tk.psz_codec, "S_TEXT/ASS" ) ||
-                 !strcmp( tk.psz_codec, "S_SSA" ) ||
-                 !strcmp( tk.psz_codec, "S_ASS" ))
-        {
-            tk.fmt.i_codec = VLC_FOURCC( 's', 's', 'a', ' ' );
-            tk.fmt.subs.psz_encoding = strdup( "UTF-8" );
-        }
-        else if( !strcmp( tk.psz_codec, "S_VOBSUB" ) )
-        {
-            tk.fmt.i_codec = VLC_FOURCC( 's','p','u',' ' );
-            if( tk.i_extra_data )
-            {
-                char *p_start;
-                char *p_buf = (char *)malloc( tk.i_extra_data + 1);
-                memcpy( p_buf, tk.p_extra_data , tk.i_extra_data );
-                p_buf[tk.i_extra_data] = '\0';
-                
-                p_start = strstr( p_buf, "size:" );
-                if( sscanf( p_start, "size: %dx%d",
-                        &tk.fmt.subs.spu.i_original_frame_width, &tk.fmt.subs.spu.i_original_frame_height ) == 2 )
-                {
-                    msg_Dbg( p_demux, "original frame size vobsubs: %dx%d", tk.fmt.subs.spu.i_original_frame_width, tk.fmt.subs.spu.i_original_frame_height );
-                }
-                else
-                {
-                    msg_Warn( p_demux, "reading original frame size for vobsub failed" );
-                }
-                free( p_buf );
-            }
-        }
-        else if( !strcmp( tk.psz_codec, "B_VOBBTN" ) )
-        {
-            /* FIXME: support this codec */
-            msg_Err( p_demux, "Vob Buttons not supported yet[%d, n=%d]", i_track, tk.i_number );
-            tk.fmt.i_codec = VLC_FOURCC( 'u', 'n', 'd', 'f' );
-        }
-        else
-        {
-            msg_Err( p_demux, "unknow codec id=`%s'", tk.psz_codec );
-            tk.fmt.i_codec = VLC_FOURCC( 'u', 'n', 'd', 'f' );
-        }
-        if( tk.b_default )
-        {
-            tk.fmt.i_priority = 1000;
-        }
-
-        tk.p_es = es_out_Add( p_demux->out, &tk.fmt );
-#undef tk
-    }
-
-    /* add information */
-    InformationCreate( p_demux );
-
-    return VLC_SUCCESS;
-
-error:
-    delete p_sys->es;
-    delete p_sys->in;
-    delete p_sys;
-    return VLC_EGENERIC;
-}
-
-/*****************************************************************************
- * Close: frees unused data
- *****************************************************************************/
-static void Close( vlc_object_t *p_this )
-{
-    demux_t     *p_demux = (demux_t*)p_this;
-    demux_sys_t *p_sys   = p_demux->p_sys;
-    int         i_track;
-
-    for( i_track = 0; i_track < p_sys->i_track; i_track++ )
-    {
-#define tk  p_sys->track[i_track]
-        if( tk.fmt.psz_description )
-        {
-            free( tk.fmt.psz_description );
-        }
-        if( tk.psz_codec )
-        {
-            free( tk.psz_codec );
-        }
-        if( tk.fmt.psz_language )
-        {
-            free( tk.fmt.psz_language );
-        }
-#undef tk
-    }
-    free( p_sys->track );
-
-    if( p_sys->psz_writing_application  )
-    {
-        free( p_sys->psz_writing_application );
-    }
-    if( p_sys->psz_muxing_application  )
-    {
-        free( p_sys->psz_muxing_application );
-    }
-
-    delete p_sys->segment;
-
-    delete p_sys->ep;
-    delete p_sys->es;
-    delete p_sys->in;
-    delete p_sys;
-}
-
-/*****************************************************************************
- * Control:
- *****************************************************************************/
-static int Control( demux_t *p_demux, int i_query, va_list args )
-{
-    demux_sys_t *p_sys = p_demux->p_sys;
-    int64_t     *pi64;
-    double      *pf, f;
-    int         i_skp;
-    mtime_t     *i_sk_time;
-
-    vlc_meta_t **pp_meta;
-
-    switch( i_query )
-    {
-        case DEMUX_GET_META:
-            pp_meta = (vlc_meta_t**)va_arg( args, vlc_meta_t** );
-            *pp_meta = vlc_meta_Duplicate( p_sys->meta );
-            return VLC_SUCCESS;
-
-        case DEMUX_GET_LENGTH:
-            pi64 = (int64_t*)va_arg( args, int64_t * );
-            if( p_sys->f_duration > 0.0 )
-            {
-                *pi64 = (int64_t)(p_sys->f_duration * 1000);
-                return VLC_SUCCESS;
-            }
-            return VLC_EGENERIC;
-
-        case DEMUX_GET_POSITION:
-            pf = (double*)va_arg( args, double * );
-/*            if (p_sys->i_pts < p_sys->i_start_pts)
-                *pf = (double)p_sys->i_start_pts / (1000.0 * p_sys->f_duration);
-            else*/
-                *pf = (double)p_sys->i_pts / (1000.0 * p_sys->f_duration);
-            return VLC_SUCCESS;
+        case DEMUX_GET_POSITION:
+            pf = (double*)va_arg( args, double * );
+            if ( p_sys->f_duration > 0.0 )
+                *pf = (double)p_sys->i_pts / (1000.0 * p_sys->f_duration);
+            return VLC_SUCCESS;
 
         case DEMUX_SET_POSITION:
             f = (double)va_arg( args, double );
@@ -1165,10 +858,7 @@ static int Control( demux_t *p_demux, int i_query, va_list args )
 
         case DEMUX_GET_TIME:
             pi64 = (int64_t*)va_arg( args, int64_t * );
-/*            if (p_sys->i_pts < p_sys->i_start_pts)
-                *pi64 = p_sys->i_start_pts;
-            else*/
-                *pi64 = p_sys->i_pts;
+            *pi64 = p_sys->i_pts;
             return VLC_SUCCESS;
 
         case DEMUX_GET_TITLE_INFO:
@@ -1207,16 +897,6 @@ static int Control( demux_t *p_demux, int i_query, va_list args )
             }
             return VLC_EGENERIC;
 
-        case DEMUX_GET_SEEKPOINT_TIME:
-            i_skp = (int)va_arg( args, int );
-            i_sk_time = (mtime_t *)va_arg( args, mtime_t * );
-            if( p_sys->title && i_skp < p_sys->title->i_seekpoint)
-            {
-                *i_sk_time = p_sys->title->seekpoint[i_skp]->i_time_offset;
-                return VLC_SUCCESS;
-            }
-            return VLC_EGENERIC;
-
         case DEMUX_SET_TIME:
         case DEMUX_GET_FPS:
         default:
@@ -1224,10 +904,8 @@ static int Control( demux_t *p_demux, int i_query, va_list args )
     }
 }
 
-static int BlockGet( demux_t *p_demux, KaxBlock **pp_block, int64_t *pi_ref1, int64_t *pi_ref2, int64_t *pi_duration )
+int matroska_segment_t::BlockGet( KaxBlock **pp_block, int64_t *pi_ref1, int64_t *pi_ref2, int64_t *pi_duration )
 {
-    demux_sys_t *p_sys = p_demux->p_sys;
-
     *pp_block = NULL;
     *pi_ref1  = -1;
     *pi_ref2  = -1;
@@ -1237,19 +915,19 @@ static int BlockGet( demux_t *p_demux, KaxBlock **pp_block, int64_t *pi_ref1, in
         EbmlElement *el;
         int         i_level;
 
-        if( p_demux->b_die )
+        if( sys.demuxer.b_die )
         {
             return VLC_EGENERIC;
         }
 
-        el = p_sys->ep->Get();
-        i_level = p_sys->ep->GetLevel();
+        el = ep->Get();
+        i_level = ep->GetLevel();
 
         if( el == NULL && *pp_block != NULL )
         {
             /* update the index */
-#define idx p_sys->index[p_sys->i_index - 1]
-            if( p_sys->i_index > 0 && idx.i_time == -1 )
+#define idx index[i_index - 1]
+            if( i_index > 0 && idx.i_time == -1 )
             {
                 idx.i_time        = (*pp_block)->GlobalTimecode() / (mtime_t)1000;
                 idx.b_key         = *pi_ref1 == -1 ? VLC_TRUE : VLC_FALSE;
@@ -1260,12 +938,12 @@ static int BlockGet( demux_t *p_demux, KaxBlock **pp_block, int64_t *pi_ref1, in
 
         if( el == NULL )
         {
-            if( p_sys->ep->GetLevel() > 1 )
+            if( ep->GetLevel() > 1 )
             {
-                p_sys->ep->Up();
+                ep->Up();
                 continue;
             }
-            msg_Warn( p_demux, "EOF" );
+            msg_Warn( &sys.demuxer, "EOF" );
             return VLC_EGENERIC;
         }
 
@@ -1274,25 +952,31 @@ static int BlockGet( demux_t *p_demux, KaxBlock **pp_block, int64_t *pi_ref1, in
         {
             if( MKV_IS_ID( el, KaxCluster ) )
             {
-                p_sys->cluster = (KaxCluster*)el;
+                cluster = (KaxCluster*)el;
 
                 /* add it to the index */
-                if( p_sys->i_index == 0 ||
-                    ( p_sys->i_index > 0 && p_sys->index[p_sys->i_index - 1].i_position < (int64_t)p_sys->cluster->GetElementPosition() ) )
+                if( i_index == 0 ||
+                    ( i_index > 0 && index[i_index - 1].i_position < (int64_t)cluster->GetElementPosition() ) )
                 {
-                    IndexAppendCluster( p_demux, p_sys->cluster );
+                    IndexAppendCluster( cluster );
                 }
 
-                p_sys->ep->Down();
+                // reset silent tracks
+                for (size_t i=0; i<tracks.size(); i++)
+                {
+                    tracks[i]->b_silent = VLC_FALSE;
+                }
+
+                ep->Down();
             }
             else if( MKV_IS_ID( el, KaxCues ) )
             {
-                msg_Warn( p_demux, "find KaxCues FIXME" );
+                msg_Warn( &sys.demuxer, "find KaxCues FIXME" );
                 return VLC_EGENERIC;
             }
             else
             {
-                msg_Dbg( p_demux, "unknown (%s)", typeid( el ).name() );
+                msg_Dbg( &sys.demuxer, "unknown (%s)", typeid( el ).name() );
             }
         }
         else if( i_level == 2 )
@@ -1301,12 +985,16 @@ static int BlockGet( demux_t *p_demux, KaxBlock **pp_block, int64_t *pi_ref1, in
             {
                 KaxClusterTimecode &ctc = *(KaxClusterTimecode*)el;
 
-                ctc.ReadData( p_sys->es->I_O(), SCOPE_ALL_DATA );
-                p_sys->cluster->InitTimecode( uint64( ctc ), p_sys->i_timescale );
+                ctc.ReadData( es.I_O(), SCOPE_ALL_DATA );
+                cluster->InitTimecode( uint64( ctc ), i_timescale );
+            }
+            else if( MKV_IS_ID( el, KaxClusterSilentTracks ) )
+            {
+                ep->Down();
             }
             else if( MKV_IS_ID( el, KaxBlockGroup ) )
             {
-                p_sys->ep->Down();
+                ep->Down();
             }
         }
         else if( i_level == 3 )
@@ -1315,185 +1003,620 @@ static int BlockGet( demux_t *p_demux, KaxBlock **pp_block, int64_t *pi_ref1, in
             {
                 *pp_block = (KaxBlock*)el;
 
-                (*pp_block)->ReadData( p_sys->es->I_O() );
-                (*pp_block)->SetParent( *p_sys->cluster );
+                (*pp_block)->ReadData( es.I_O() );
+                (*pp_block)->SetParent( *cluster );
 
-                p_sys->ep->Keep();
+                ep->Keep();
             }
             else if( MKV_IS_ID( el, KaxBlockDuration ) )
             {
                 KaxBlockDuration &dur = *(KaxBlockDuration*)el;
 
-                dur.ReadData( p_sys->es->I_O() );
+                dur.ReadData( es.I_O() );
                 *pi_duration = uint64( dur );
             }
             else if( MKV_IS_ID( el, KaxReferenceBlock ) )
             {
                 KaxReferenceBlock &ref = *(KaxReferenceBlock*)el;
 
-                ref.ReadData( p_sys->es->I_O() );
+                ref.ReadData( es.I_O() );
                 if( *pi_ref1 == -1 )
                 {
-                    *pi_ref1 = int64( ref );
+                    *pi_ref1 = int64( ref );
+                }
+                else
+                {
+                    *pi_ref2 = int64( ref );
+                }
+            }
+            else if( MKV_IS_ID( el, KaxClusterSilentTrackNumber ) )
+            {
+                KaxClusterSilentTrackNumber &track_num = *(KaxClusterSilentTrackNumber*)el;
+                track_num.ReadData( es.I_O() );
+                // find the track
+                for (size_t i=0; i<tracks.size(); i++)
+                {
+                    if ( tracks[i]->i_number == uint32(track_num))
+                    {
+                        tracks[i]->b_silent = VLC_TRUE;
+                        break;
+                    }
+                }
+            }
+        }
+        else
+        {
+            msg_Err( &sys.demuxer, "invalid level = %d", i_level );
+            return VLC_EGENERIC;
+        }
+    }
+}
+
+static block_t *MemToBlock( demux_t *p_demux, uint8_t *p_mem, int i_mem)
+{
+    block_t *p_block;
+    if( !(p_block = block_New( p_demux, i_mem ) ) ) return NULL;
+    memcpy( p_block->p_buffer, p_mem, i_mem );
+    //p_block->i_rate = p_input->stream.control.i_rate;
+    return p_block;
+}
+
+static void BlockDecode( demux_t *p_demux, KaxBlock *block, mtime_t i_pts,
+                         mtime_t i_duration )
+{
+    demux_sys_t        *p_sys = p_demux->p_sys;
+    matroska_segment_t *p_segment = p_sys->p_current_segment->Segment();
+
+    size_t          i_track;
+    unsigned int    i;
+    vlc_bool_t      b;
+
+#define tk  p_segment->tracks[i_track]
+    for( i_track = 0; i_track < p_segment->tracks.size(); i_track++ )
+    {
+        if( tk->i_number == block->TrackNum() )
+        {
+            break;
+        }
+    }
+
+    if( i_track >= p_segment->tracks.size() )
+    {
+        msg_Err( p_demux, "invalid track number=%d", block->TrackNum() );
+        return;
+    }
+    if( tk->p_es == NULL )
+    {
+        msg_Err( p_demux, "unknown track number=%d", block->TrackNum() );
+        return;
+    }
+    if( i_pts < p_sys->i_start_pts && tk->fmt.i_cat == AUDIO_ES )
+    {
+        return; /* discard audio packets that shouldn't be rendered */
+    }
+
+    es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b );
+    if( !b )
+    {
+        tk->b_inited = VLC_FALSE;
+        return;
+    }
+
+    /* First send init data */
+    if( !tk->b_inited && tk->i_data_init > 0 )
+    {
+        block_t *p_init;
+
+        msg_Dbg( p_demux, "sending header (%d bytes)", tk->i_data_init );
+        p_init = MemToBlock( p_demux, tk->p_data_init, tk->i_data_init );
+        if( p_init ) es_out_Send( p_demux->out, tk->p_es, p_init );
+    }
+    tk->b_inited = VLC_TRUE;
+
+
+    for( i = 0; i < block->NumberFrames(); i++ )
+    {
+        block_t *p_block;
+        DataBuffer &data = block->GetBuffer(i);
+
+        p_block = MemToBlock( p_demux, data.Buffer(), data.Size() );
+
+        if( p_block == NULL )
+        {
+            break;
+        }
+
+#if defined(HAVE_ZLIB_H)
+        if( tk->i_compression_type )
+        {
+            p_block = block_zlib_decompress( VLC_OBJECT(p_demux), p_block );
+        }
+#endif
+
+        // TODO implement correct timestamping when B frames are used
+        if( tk->fmt.i_cat != VIDEO_ES )
+        {
+            p_block->i_dts = p_block->i_pts = i_pts;
+        }
+        else
+        {
+            p_block->i_dts = i_pts;
+            p_block->i_pts = 0;
+        }
+
+        if( tk->fmt.i_cat == SPU_ES && strcmp( tk->psz_codec, "S_VOBSUB" ) )
+        {
+            p_block->i_length = i_duration * 1000;
+        }
+msg_Warn( p_demux, "Sending block %d", p_block );
+        es_out_Send( p_demux->out, tk->p_es, p_block );
+
+        /* use time stamp only for first block */
+        i_pts = 0;
+    }
+
+#undef tk
+}
+
+matroska_stream_t *demux_sys_t::AnalyseAllSegmentsFound( EbmlStream *p_estream )
+{
+    int i_upper_lvl = 0;
+    size_t i;
+    EbmlElement *p_l0, *p_l1, *p_l2;
+    bool b_keep_stream = false, b_keep_segment;
+
+    // verify the EBML Header
+    p_l0 = p_estream->FindNextID(EbmlHead::ClassInfos, 0xFFFFFFFFL);
+    if (p_l0 == NULL)
+    {
+        return NULL;
+    }
+    p_l0->SkipData(*p_estream, EbmlHead_Context);
+    delete p_l0;
+
+    // find all segments in this file
+    p_l0 = p_estream->FindNextID(KaxSegment::ClassInfos, 0xFFFFFFFFL);
+    if (p_l0 == NULL)
+    {
+        return NULL;
+    }
+
+    matroska_stream_t *p_stream1 = new matroska_stream_t( *this );
+
+    while (p_l0 != 0)
+    {
+        if (EbmlId(*p_l0) == KaxSegment::ClassInfos.GlobalId)
+        {
+            EbmlParser  *ep;
+            matroska_segment_t *p_segment1 = new matroska_segment_t( *this, *p_estream );
+            b_keep_segment = false;
+
+            ep = new EbmlParser(p_estream, p_l0);
+            p_segment1->ep = ep;
+            p_segment1->segment = (KaxSegment*)p_l0;
+
+            while ((p_l1 = ep->Get()))
+            {
+                if (MKV_IS_ID(p_l1, KaxInfo))
+                {
+                    // find the families of this segment
+                    KaxInfo *p_info = static_cast<KaxInfo*>(p_l1);
+
+                    p_info->Read(*p_estream, KaxInfo::ClassInfos.Context, i_upper_lvl, p_l2, true);
+                    for( i = 0; i < p_info->ListSize(); i++ )
+                    {
+                        EbmlElement *l = (*p_info)[i];
+
+                        if( MKV_IS_ID( l, KaxSegmentUID ) )
+                        {
+                            KaxSegmentUID *p_uid = static_cast<KaxSegmentUID*>(l);
+                            b_keep_segment = (FindSegment( *p_uid ) == NULL);
+                            if ( !b_keep_segment )
+                                break; // this segment is already known
+                            opened_segments.push_back( p_segment1 );
+                            p_segment1->segment_uid = *( new KaxSegmentUID(*p_uid) );
+                        }
+                        else if( MKV_IS_ID( l, KaxPrevUID ) )
+                        {
+                            p_segment1->prev_segment_uid = *( new KaxPrevUID( *static_cast<KaxPrevUID*>(l) ) );
+                        }
+                        else if( MKV_IS_ID( l, KaxNextUID ) )
+                        {
+                            p_segment1->next_segment_uid = *( new KaxNextUID( *static_cast<KaxNextUID*>(l) ) );
+                        }
+                        else if( MKV_IS_ID( l, KaxSegmentFamily ) )
+                        {
+                            KaxSegmentFamily *p_fam = new KaxSegmentFamily( *static_cast<KaxSegmentFamily*>(l) );
+                            std::vector<KaxSegmentFamily>::iterator iter;
+                            p_segment1->families.push_back( *p_fam );
+                        }
+                    }
+                    break;
+                }
+            }
+            if ( b_keep_segment )
+            {
+                b_keep_stream = true;
+                p_stream1->segments.push_back( p_segment1 );
+            }
+            else
+                delete p_segment1;
+        }
+
+        p_l0->SkipData(*p_estream, EbmlHead_Context);
+        p_l0 = p_estream->FindNextID(KaxSegment::ClassInfos, 0xFFFFFFFFL);
+    }
+
+    if ( !b_keep_stream )
+    {
+        delete p_stream1;
+        p_stream1 = NULL;
+    }
+
+    return p_stream1;
+}
+
+bool matroska_segment_t::Select( mtime_t i_start_time )
+{
+    size_t i_track;
+
+    /* add all es */
+    msg_Dbg( &sys.demuxer, "found %d es", tracks.size() );
+    for( i_track = 0; i_track < tracks.size(); i_track++ )
+    {
+#define tk  tracks[i_track]
+        if( tk->fmt.i_cat == UNKNOWN_ES )
+        {
+            msg_Warn( &sys.demuxer, "invalid track[%d, n=%d]", i_track, tk->i_number );
+            tk->p_es = NULL;
+            continue;
+        }
+
+        if( !strcmp( tk->psz_codec, "V_MS/VFW/FOURCC" ) )
+        {
+            if( tk->i_extra_data < (int)sizeof( BITMAPINFOHEADER ) )
+            {
+                msg_Err( &sys.demuxer, "missing/invalid BITMAPINFOHEADER" );
+                tk->fmt.i_codec = VLC_FOURCC( 'u', 'n', 'd', 'f' );
+            }
+            else
+            {
+                BITMAPINFOHEADER *p_bih = (BITMAPINFOHEADER*)tk->p_extra_data;
+
+                tk->fmt.video.i_width = GetDWLE( &p_bih->biWidth );
+                tk->fmt.video.i_height= GetDWLE( &p_bih->biHeight );
+                tk->fmt.i_codec       = GetFOURCC( &p_bih->biCompression );
+
+                tk->fmt.i_extra       = GetDWLE( &p_bih->biSize ) - sizeof( BITMAPINFOHEADER );
+                if( tk->fmt.i_extra > 0 )
+                {
+                    tk->fmt.p_extra = malloc( tk->fmt.i_extra );
+                    memcpy( tk->fmt.p_extra, &p_bih[1], tk->fmt.i_extra );
+                }
+            }
+        }
+        else if( !strcmp( tk->psz_codec, "V_MPEG1" ) ||
+                 !strcmp( tk->psz_codec, "V_MPEG2" ) )
+        {
+            tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'v' );
+        }
+        else if( !strncmp( tk->psz_codec, "V_MPEG4", 7 ) )
+        {
+            if( !strcmp( tk->psz_codec, "V_MPEG4/MS/V3" ) )
+            {
+                tk->fmt.i_codec = VLC_FOURCC( 'D', 'I', 'V', '3' );
+            }
+            else if( !strcmp( tk->psz_codec, "V_MPEG4/ISO/AVC" ) )
+            {
+                tk->fmt.i_codec = VLC_FOURCC( 'a', 'v', 'c', '1' );
+                tk->fmt.b_packetized = VLC_FALSE;
+                tk->fmt.i_extra = tk->i_extra_data;
+                tk->fmt.p_extra = malloc( tk->i_extra_data );
+                memcpy( tk->fmt.p_extra,tk->p_extra_data, tk->i_extra_data );
+            }
+            else
+            {
+                tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', '4', 'v' );
+            }
+        }
+        else if( !strcmp( tk->psz_codec, "V_QUICKTIME" ) )
+        {
+            MP4_Box_t *p_box = (MP4_Box_t*)malloc( sizeof( MP4_Box_t ) );
+            stream_t *p_mp4_stream = stream_MemoryNew( VLC_OBJECT(&sys.demuxer),
+                                                       tk->p_extra_data,
+                                                       tk->i_extra_data );
+            MP4_ReadBoxCommon( p_mp4_stream, p_box );
+            MP4_ReadBox_sample_vide( p_mp4_stream, p_box );
+            tk->fmt.i_codec = p_box->i_type;
+            tk->fmt.video.i_width = p_box->data.p_sample_vide->i_width;
+            tk->fmt.video.i_height = p_box->data.p_sample_vide->i_height;
+            tk->fmt.i_extra = p_box->data.p_sample_vide->i_qt_image_description;
+            tk->fmt.p_extra = malloc( tk->fmt.i_extra );
+            memcpy( tk->fmt.p_extra, p_box->data.p_sample_vide->p_qt_image_description, tk->fmt.i_extra );
+            MP4_FreeBox_sample_vide( p_box );
+            stream_MemoryDelete( p_mp4_stream, VLC_TRUE );
+        }
+        else if( !strcmp( tk->psz_codec, "A_MS/ACM" ) )
+        {
+            if( tk->i_extra_data < (int)sizeof( WAVEFORMATEX ) )
+            {
+                msg_Err( &sys.demuxer, "missing/invalid WAVEFORMATEX" );
+                tk->fmt.i_codec = VLC_FOURCC( 'u', 'n', 'd', 'f' );
+            }
+            else
+            {
+                WAVEFORMATEX *p_wf = (WAVEFORMATEX*)tk->p_extra_data;
+
+                wf_tag_to_fourcc( GetWLE( &p_wf->wFormatTag ), &tk->fmt.i_codec, NULL );
+
+                tk->fmt.audio.i_channels   = GetWLE( &p_wf->nChannels );
+                tk->fmt.audio.i_rate = GetDWLE( &p_wf->nSamplesPerSec );
+                tk->fmt.i_bitrate    = GetDWLE( &p_wf->nAvgBytesPerSec ) * 8;
+                tk->fmt.audio.i_blockalign = GetWLE( &p_wf->nBlockAlign );;
+                tk->fmt.audio.i_bitspersample = GetWLE( &p_wf->wBitsPerSample );
+
+                tk->fmt.i_extra            = GetWLE( &p_wf->cbSize );
+                if( tk->fmt.i_extra > 0 )
+                {
+                    tk->fmt.p_extra = malloc( tk->fmt.i_extra );
+                    memcpy( tk->fmt.p_extra, &p_wf[1], tk->fmt.i_extra );
+                }
+            }
+        }
+        else if( !strcmp( tk->psz_codec, "A_MPEG/L3" ) ||
+                 !strcmp( tk->psz_codec, "A_MPEG/L2" ) ||
+                 !strcmp( tk->psz_codec, "A_MPEG/L1" ) )
+        {
+            tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'a' );
+        }
+        else if( !strcmp( tk->psz_codec, "A_AC3" ) )
+        {
+            tk->fmt.i_codec = VLC_FOURCC( 'a', '5', '2', ' ' );
+        }
+        else if( !strcmp( tk->psz_codec, "A_DTS" ) )
+        {
+            tk->fmt.i_codec = VLC_FOURCC( 'd', 't', 's', ' ' );
+        }
+        else if( !strcmp( tk->psz_codec, "A_FLAC" ) )
+        {
+            tk->fmt.i_codec = VLC_FOURCC( 'f', 'l', 'a', 'c' );
+            tk->fmt.i_extra = tk->i_extra_data;
+            tk->fmt.p_extra = malloc( tk->i_extra_data );
+            memcpy( tk->fmt.p_extra,tk->p_extra_data, tk->i_extra_data );
+        }
+        else if( !strcmp( tk->psz_codec, "A_VORBIS" ) )
+        {
+            int i, i_offset = 1, i_size[3], i_extra;
+            uint8_t *p_extra;
+
+            tk->fmt.i_codec = VLC_FOURCC( 'v', 'o', 'r', 'b' );
+
+            /* Split the 3 headers */
+            if( tk->p_extra_data[0] != 0x02 )
+                msg_Err( &sys.demuxer, "invalid vorbis header" );
+
+            for( i = 0; i < 2; i++ )
+            {
+                i_size[i] = 0;
+                while( i_offset < tk->i_extra_data )
+                {
+                    i_size[i] += tk->p_extra_data[i_offset];
+                    if( tk->p_extra_data[i_offset++] != 0xff ) break;
+                }
+            }
+
+            i_size[0] = __MIN(i_size[0], tk->i_extra_data - i_offset);
+            i_size[1] = __MIN(i_size[1], tk->i_extra_data -i_offset -i_size[0]);
+            i_size[2] = tk->i_extra_data - i_offset - i_size[0] - i_size[1];
+
+            tk->fmt.i_extra = 3 * 2 + i_size[0] + i_size[1] + i_size[2];
+            tk->fmt.p_extra = malloc( tk->fmt.i_extra );
+            p_extra = (uint8_t *)tk->fmt.p_extra; i_extra = 0;
+            for( i = 0; i < 3; i++ )
+            {
+                *(p_extra++) = i_size[i] >> 8;
+                *(p_extra++) = i_size[i] & 0xFF;
+                memcpy( p_extra, tk->p_extra_data + i_offset + i_extra,
+                        i_size[i] );
+                p_extra += i_size[i];
+                i_extra += i_size[i];
+            }
+        }
+        else if( !strncmp( tk->psz_codec, "A_AAC/MPEG2/", strlen( "A_AAC/MPEG2/" ) ) ||
+                 !strncmp( tk->psz_codec, "A_AAC/MPEG4/", strlen( "A_AAC/MPEG4/" ) ) )
+        {
+            int i_profile, i_srate;
+            static unsigned int i_sample_rates[] =
+            {
+                    96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050,
+                        16000, 12000, 11025, 8000,  7350,  0,     0,     0
+            };
+
+            tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', '4', 'a' );
+            /* create data for faad (MP4DecSpecificDescrTag)*/
+
+            if( !strcmp( &tk->psz_codec[12], "MAIN" ) )
+            {
+                i_profile = 0;
+            }
+            else if( !strcmp( &tk->psz_codec[12], "LC" ) )
+            {
+                i_profile = 1;
+            }
+            else if( !strcmp( &tk->psz_codec[12], "SSR" ) )
+            {
+                i_profile = 2;
+            }
+            else
+            {
+                i_profile = 3;
+            }
+
+            for( i_srate = 0; i_srate < 13; i_srate++ )
+            {
+                if( i_sample_rates[i_srate] == tk->fmt.audio.i_rate )
+                {
+                    break;
+                }
+            }
+            msg_Dbg( &sys.demuxer, "profile=%d srate=%d", i_profile, i_srate );
+
+            tk->fmt.i_extra = 2;
+            tk->fmt.p_extra = malloc( tk->fmt.i_extra );
+            ((uint8_t*)tk->fmt.p_extra)[0] = ((i_profile + 1) << 3) | ((i_srate&0xe) >> 1);
+            ((uint8_t*)tk->fmt.p_extra)[1] = ((i_srate & 0x1) << 7) | (tk->fmt.audio.i_channels << 3);
+        }
+        else if( !strcmp( tk->psz_codec, "A_PCM/INT/BIG" ) ||
+                 !strcmp( tk->psz_codec, "A_PCM/INT/LIT" ) ||
+                 !strcmp( tk->psz_codec, "A_PCM/FLOAT/IEEE" ) )
+        {
+            if( !strcmp( tk->psz_codec, "A_PCM/INT/BIG" ) )
+            {
+                tk->fmt.i_codec = VLC_FOURCC( 't', 'w', 'o', 's' );
+            }
+            else
+            {
+                tk->fmt.i_codec = VLC_FOURCC( 'a', 'r', 'a', 'w' );
+            }
+            tk->fmt.audio.i_blockalign = ( tk->fmt.audio.i_bitspersample + 7 ) / 8 * tk->fmt.audio.i_channels;
+        }
+        else if( !strcmp( tk->psz_codec, "A_TTA1" ) )
+        {
+            /* FIXME: support this codec */
+            msg_Err( &sys.demuxer, "TTA not supported yet[%d, n=%d]", i_track, tk->i_number );
+            tk->fmt.i_codec = VLC_FOURCC( 'u', 'n', 'd', 'f' );
+        }
+        else if( !strcmp( tk->psz_codec, "A_WAVPACK4" ) )
+        {
+            /* FIXME: support this codec */
+            msg_Err( &sys.demuxer, "Wavpack not supported yet[%d, n=%d]", i_track, tk->i_number );
+            tk->fmt.i_codec = VLC_FOURCC( 'u', 'n', 'd', 'f' );
+        }
+        else if( !strcmp( tk->psz_codec, "S_TEXT/UTF8" ) )
+        {
+            tk->fmt.i_codec = VLC_FOURCC( 's', 'u', 'b', 't' );
+            tk->fmt.subs.psz_encoding = strdup( "UTF-8" );
+        }
+        else if( !strcmp( tk->psz_codec, "S_TEXT/SSA" ) ||
+                 !strcmp( tk->psz_codec, "S_TEXT/ASS" ) ||
+                 !strcmp( tk->psz_codec, "S_SSA" ) ||
+                 !strcmp( tk->psz_codec, "S_ASS" ))
+        {
+            tk->fmt.i_codec = VLC_FOURCC( 's', 's', 'a', ' ' );
+            tk->fmt.subs.psz_encoding = strdup( "UTF-8" );
+        }
+        else if( !strcmp( tk->psz_codec, "S_VOBSUB" ) )
+        {
+            tk->fmt.i_codec = VLC_FOURCC( 's','p','u',' ' );
+            if( tk->i_extra_data )
+            {
+                char *p_start;
+                char *p_buf = (char *)malloc( tk->i_extra_data + 1);
+                memcpy( p_buf, tk->p_extra_data , tk->i_extra_data );
+                p_buf[tk->i_extra_data] = '\0';
+                
+                p_start = strstr( p_buf, "size:" );
+                if( sscanf( p_start, "size: %dx%d",
+                        &tk->fmt.subs.spu.i_original_frame_width, &tk->fmt.subs.spu.i_original_frame_height ) == 2 )
+                {
+                    msg_Dbg( &sys.demuxer, "original frame size vobsubs: %dx%d", tk->fmt.subs.spu.i_original_frame_width, tk->fmt.subs.spu.i_original_frame_height );
                 }
                 else
                 {
-                    *pi_ref2 = int64( ref );
+                    msg_Warn( &sys.demuxer, "reading original frame size for vobsub failed" );
                 }
+                free( p_buf );
             }
         }
+        else if( !strcmp( tk->psz_codec, "B_VOBBTN" ) )
+        {
+            /* FIXME: support this codec */
+            msg_Err( &sys.demuxer, "Vob Buttons not supported yet[%d, n=%d]", i_track, tk->i_number );
+            tk->fmt.i_codec = VLC_FOURCC( 'u', 'n', 'd', 'f' );
+        }
         else
         {
-            msg_Err( p_demux, "invalid level = %d", i_level );
-            return VLC_EGENERIC;
+            msg_Err( &sys.demuxer, "unknow codec id=`%s'", tk->psz_codec );
+            tk->fmt.i_codec = VLC_FOURCC( 'u', 'n', 'd', 'f' );
         }
-    }
-}
-
-static block_t *MemToBlock( demux_t *p_demux, uint8_t *p_mem, int i_mem)
-{
-    block_t *p_block;
-    if( !(p_block = block_New( p_demux, i_mem ) ) ) return NULL;
-    memcpy( p_block->p_buffer, p_mem, i_mem );
-    //p_block->i_rate = p_input->stream.control.i_rate;
-    return p_block;
-}
-
-static void BlockDecode( demux_t *p_demux, KaxBlock *block, mtime_t i_pts,
-                         mtime_t i_duration )
-{
-    demux_sys_t *p_sys = p_demux->p_sys;
-
-    int             i_track;
-    unsigned int    i;
-    vlc_bool_t      b;
-
-#define tk  p_sys->track[i_track]
-    for( i_track = 0; i_track < p_sys->i_track; i_track++ )
-    {
-        if( tk.i_number == block->TrackNum() )
+        if( tk->b_default )
         {
-            break;
+            tk->fmt.i_priority = 1000;
         }
-    }
 
-    if( i_track >= p_sys->i_track )
-    {
-        msg_Err( p_demux, "invalid track number=%d", block->TrackNum() );
-        return;
-    }
-    if( tk.p_es == NULL )
-    {
-        msg_Err( p_demux, "unknown track number=%d", block->TrackNum() );
-        return;
-    }
-    if( i_pts < p_sys->i_start_pts && tk.fmt.i_cat == AUDIO_ES )
-    {
-        return; /* discard audio packets that shouldn't be rendered */
-    }
+        tk->p_es = es_out_Add( sys.demuxer.out, &tk->fmt );
 
-    es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk.p_es, &b );
-    if( !b )
-    {
-        tk.b_inited = VLC_FALSE;
-        return;
+        es_out_Control( sys.demuxer.out, ES_OUT_SET_NEXT_DISPLAY_TIME, tk->p_es, i_start_time );
+#undef tk
     }
+    
+    sys.i_start_pts = i_start_time;
+    ep->Reset();
 
-    /* First send init data */
-    if( !tk.b_inited && tk.i_data_init > 0 )
-    {
-        block_t *p_init;
+    // reset the stream reading to the first cluster of the segment used
+    es.I_O().setFilePointer( i_start_pos );
 
-        msg_Dbg( p_demux, "sending header (%d bytes)", tk.i_data_init );
-        p_init = MemToBlock( p_demux, tk.p_data_init, tk.i_data_init );
-        if( p_init ) es_out_Send( p_demux->out, tk.p_es, p_init );
-    }
-    tk.b_inited = VLC_TRUE;
+    return true;
+}
 
+void matroska_segment_t::UnSelect( )
+{
+    size_t i_track;
 
-    for( i = 0; i < block->NumberFrames(); i++ )
+    for( i_track = 0; i_track < tracks.size(); i_track++ )
     {
-        block_t *p_block;
-        DataBuffer &data = block->GetBuffer(i);
-
-        p_block = MemToBlock( p_demux, data.Buffer(), data.Size() );
-
-        if( p_block == NULL )
-        {
-            break;
-        }
-
-#if defined(HAVE_ZLIB_H)
-        if( tk.i_compression_type )
-        {
-            p_block = block_zlib_decompress( VLC_OBJECT(p_demux), p_block );
-        }
-#endif
-
-        // TODO implement correct timestamping when B frames are used
-        if( tk.fmt.i_cat != VIDEO_ES )
-        {
-            p_block->i_dts = p_block->i_pts = i_pts;
-        }
-        else
-        {
-            p_block->i_dts = i_pts;
-            p_block->i_pts = 0;
-        }
-
-        if( tk.fmt.i_cat == SPU_ES && strcmp( tk.psz_codec, "S_VOBSUB" ) )
+#define tk  tracks[i_track]
+        if ( tk->p_es != NULL )
         {
-            p_block->i_length = i_duration * 1000;
+            es_out_Del( sys.demuxer.out, tk->p_es );
+            tk->p_es = NULL;
         }
-        es_out_Send( p_demux->out, tk.p_es, p_block );
-
-        /* use time stamp only for first block */
-        i_pts = 0;
-    }
-
 #undef tk
+    }
 }
 
 static void UpdateCurrentToChapter( demux_t & demux )
 {
     demux_sys_t & sys = *demux.p_sys;
+    matroska_segment_t *p_segment = sys.p_current_segment->Segment();
     const chapter_item_t *psz_curr_chapter;
 
     /* update current chapter/seekpoint */
-    if ( sys.editions.size())
+    if ( p_segment->editions.size())
     {
         /* 1st, we need to know in which chapter we are */
-        psz_curr_chapter = sys.editions[sys.i_current_edition].FindTimecode( sys.i_pts );
+        psz_curr_chapter = p_segment->editions[p_segment->i_current_edition].FindTimecode( sys.i_pts );
 
         /* we have moved to a new chapter */
-        if (sys.psz_current_chapter != NULL && psz_curr_chapter != NULL && sys.psz_current_chapter != psz_curr_chapter)
+        if (p_segment->psz_current_chapter != NULL && psz_curr_chapter != NULL && p_segment->psz_current_chapter != psz_curr_chapter)
         {
-            if (sys.psz_current_chapter->i_seekpoint_num != psz_curr_chapter->i_seekpoint_num && psz_curr_chapter->i_seekpoint_num > 0)
+            if (p_segment->psz_current_chapter->i_seekpoint_num != psz_curr_chapter->i_seekpoint_num && psz_curr_chapter->i_seekpoint_num > 0)
             {
                 demux.info.i_update |= INPUT_UPDATE_SEEKPOINT;
                 demux.info.i_seekpoint = psz_curr_chapter->i_seekpoint_num - 1;
             }
 
-            if (sys.editions[sys.i_current_edition].b_ordered )
+            if (p_segment->editions[p_segment->i_current_edition].b_ordered )
             {
                 /* TODO check if we need to silently seek to a new location in the stream (switch to another chapter) */
-                if (sys.psz_current_chapter->i_end_time != psz_curr_chapter->i_start_time)
+                if (p_segment->psz_current_chapter->i_end_time != psz_curr_chapter->i_start_time)
                     Seek(&demux, sys.i_pts, -1, psz_curr_chapter);
                 /* count the last duration time found for each track in a table (-1 not found, -2 silent) */
                 /* only seek after each duration >= end timecode of the current chapter */
             }
 
-//            sys.i_user_time = psz_curr_chapter->i_user_start_time - psz_curr_chapter->i_start_time;
-//            sys.i_start_pts = psz_curr_chapter->i_user_start_time;
+//            p_segment->i_user_time = psz_curr_chapter->i_user_start_time - psz_curr_chapter->i_start_time;
+//            p_segment->i_start_pts = psz_curr_chapter->i_user_start_time;
         }
-        sys.psz_current_chapter = psz_curr_chapter;
+        p_segment->psz_current_chapter = psz_curr_chapter;
     }
 }
 
 static void Seek( demux_t *p_demux, mtime_t i_date, double f_percent, const chapter_item_t *psz_chapter)
 {
-    demux_sys_t *p_sys = p_demux->p_sys;
-    mtime_t i_time_offset = 0;
+    demux_sys_t        *p_sys = p_demux->p_sys;
+    matroska_segment_t *p_segment = p_sys->p_current_segment->Segment();
+    mtime_t            i_time_offset = 0;
 
     KaxBlock    *block;
     int64_t     i_block_duration;
@@ -1502,7 +1625,7 @@ static void Seek( demux_t *p_demux, mtime_t i_date, double f_percent, const chap
 
     int         i_index = 0;
     int         i_track_skipping;
-    int         i_track;
+    size_t      i_track;
 
     msg_Dbg( p_demux, "seek request to "I64Fd" (%f%%)", i_date, f_percent );
     if( i_date < 0 && f_percent < 0 )
@@ -1516,12 +1639,12 @@ static void Seek( demux_t *p_demux, mtime_t i_date, double f_percent, const chap
         return;
     }
 
-    delete p_sys->ep;
-    p_sys->ep = new EbmlParser( p_sys->es, p_sys->segment );
-    p_sys->cluster = NULL;
+    delete p_segment->ep;
+    p_segment->ep = new EbmlParser( &p_segment->es, p_segment->segment );
+    p_segment->cluster = NULL;
 
     /* seek without index or without date */
-    if( f_percent >= 0 && (config_GetInt( p_demux, "mkv-seek-percent" ) || !p_sys->b_cues || i_date < 0 ))
+    if( f_percent >= 0 && (config_GetInt( p_demux, "mkv-seek-percent" ) || !p_segment->b_cues || i_date < 0 ))
     {
         if (p_sys->f_duration >= 0)
         {
@@ -1532,22 +1655,22 @@ static void Seek( demux_t *p_demux, mtime_t i_date, double f_percent, const chap
             int64_t i_pos = int64_t( f_percent * stream_Size( p_demux->s ) );
 
             msg_Dbg( p_demux, "inacurate way of seeking" );
-            for( i_index = 0; i_index < p_sys->i_index; i_index++ )
+            for( i_index = 0; i_index < p_segment->i_index; i_index++ )
             {
-                if( p_sys->index[i_index].i_position >= i_pos)
+                if( p_segment->index[i_index].i_position >= i_pos)
                 {
                     break;
                 }
             }
-            if( i_index == p_sys->i_index )
+            if( i_index == p_segment->i_index )
             {
                 i_index--;
             }
 
-            i_date = p_sys->index[i_index].i_time;
+            i_date = p_segment->index[i_index].i_time;
 
 #if 0
-            if( p_sys->index[i_index].i_position < i_pos )
+            if( p_segment->index[i_index].i_position < i_pos )
             {
                 EbmlElement *el;
 
@@ -1561,7 +1684,7 @@ static void Seek( demux_t *p_demux, mtime_t i_date, double f_percent, const chap
                         KaxCluster *cluster = (KaxCluster*)el;
 
                         /* add it to the index */
-                        IndexAppendCluster( p_demux, cluster );
+                        p_segment->IndexAppendCluster( cluster );
 
                         if( (int64_t)cluster->GetElementPosition() >= i_pos )
                         {
@@ -1579,24 +1702,24 @@ static void Seek( demux_t *p_demux, mtime_t i_date, double f_percent, const chap
     // find the actual time for an ordered edition
     if ( psz_chapter == NULL )
     {
-        if ( p_sys->editions.size() && p_sys->editions[p_sys->i_current_edition].b_ordered )
+        if ( p_segment->editions.size() && p_segment->editions[p_segment->i_current_edition].b_ordered )
         {
             /* 1st, we need to know in which chapter we are */
-            psz_chapter = p_sys->editions[p_sys->i_current_edition].FindTimecode( i_date );
+            psz_chapter = p_segment->editions[p_segment->i_current_edition].FindTimecode( i_date );
         }
     }
 
     if ( psz_chapter != NULL )
     {
-        p_sys->psz_current_chapter = psz_chapter;
+        p_segment->psz_current_chapter = psz_chapter;
         p_sys->i_chapter_time = i_time_offset = psz_chapter->i_user_start_time - psz_chapter->i_start_time;
         p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
         p_demux->info.i_seekpoint = psz_chapter->i_seekpoint_num - 1;
     }
 
-    for( ; i_index < p_sys->i_index; i_index++ )
+    for( ; i_index < p_segment->i_index; i_index++ )
     {
-        if( p_sys->index[i_index].i_time + i_time_offset > i_date )
+        if( p_segment->index[i_index].i_time + i_time_offset > i_date )
         {
             break;
         }
@@ -1608,11 +1731,11 @@ static void Seek( demux_t *p_demux, mtime_t i_date, double f_percent, const chap
     }
 
     msg_Dbg( p_demux, "seek got "I64Fd" (%d%%)",
-                p_sys->index[i_index].i_time,
-                (int)( 100 * p_sys->index[i_index].i_position /
+                p_segment->index[i_index].i_time,
+                (int)( 100 * p_segment->index[i_index].i_position /
                     stream_Size( p_demux->s ) ) );
 
-    p_sys->in->setFilePointer( p_sys->index[i_index].i_position,
+    p_segment->es.I_O().setFilePointer( p_segment->index[i_index].i_position,
                                 seek_beginning );
 
     p_sys->i_start_pts = i_date;
@@ -1620,31 +1743,31 @@ static void Seek( demux_t *p_demux, mtime_t i_date, double f_percent, const chap
     es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 
     /* now parse until key frame */
-#define tk  p_sys->track[i_track]
+#define tk  p_segment->tracks[i_track]
     i_track_skipping = 0;
-    for( i_track = 0; i_track < p_sys->i_track; i_track++ )
+    for( i_track = 0; i_track < p_segment->tracks.size(); i_track++ )
     {
-        if( tk.fmt.i_cat == VIDEO_ES )
+        if( tk->fmt.i_cat == VIDEO_ES )
         {
-            tk.b_search_keyframe = VLC_TRUE;
+            tk->b_search_keyframe = VLC_TRUE;
             i_track_skipping++;
         }
-        es_out_Control( p_demux->out, ES_OUT_SET_NEXT_DISPLAY_TIME, tk.p_es, i_date );
+        es_out_Control( p_demux->out, ES_OUT_SET_NEXT_DISPLAY_TIME, tk->p_es, i_date );
     }
 
 
     while( i_track_skipping > 0 )
     {
-        if( BlockGet( p_demux, &block, &i_block_ref1, &i_block_ref2, &i_block_duration ) )
+        if( p_segment->BlockGet( &block, &i_block_ref1, &i_block_ref2, &i_block_duration ) )
         {
             msg_Warn( p_demux, "cannot get block EOF?" );
 
             return;
         }
 
-        for( i_track = 0; i_track < p_sys->i_track; i_track++ )
+        for( i_track = 0; i_track < p_segment->tracks.size(); i_track++ )
         {
-            if( tk.i_number == block->TrackNum() )
+            if( tk->i_number == block->TrackNum() )
             {
                 break;
             }
@@ -1652,20 +1775,25 @@ static void Seek( demux_t *p_demux, mtime_t i_date, double f_percent, const chap
 
         p_sys->i_pts = p_sys->i_chapter_time + block->GlobalTimecode() / (mtime_t) 1000;
 
-        if( i_track < p_sys->i_track )
+        if( i_track < p_segment->tracks.size() )
         {
-            if( tk.fmt.i_cat == VIDEO_ES )
+            if( p_sys->i_pts >= p_sys->i_start_pts )
+            {
+                BlockDecode( p_demux, block, p_sys->i_pts, 0 );
+                i_track_skipping = 0;
+            }
+            else if( tk->fmt.i_cat == VIDEO_ES )
             {
-                if( i_block_ref1 == -1 && tk.b_search_keyframe )
+                if( i_block_ref1 == -1 && tk->b_search_keyframe )
                 {
-                    tk.b_search_keyframe = VLC_FALSE;
+                    tk->b_search_keyframe = VLC_FALSE;
                     i_track_skipping--;
                 }
-                if( !tk.b_search_keyframe )
+                if( !tk->b_search_keyframe )
                 {
                     BlockDecode( p_demux, block, p_sys->i_pts, 0 );
                 }
-            }
+            } 
         }
 
         delete block;
@@ -1680,8 +1808,10 @@ static void Seek( demux_t *p_demux, mtime_t i_date, double f_percent, const chap
  *****************************************************************************/
 static int Demux( demux_t *p_demux)
 {
-    demux_sys_t *p_sys = p_demux->p_sys;
-    int            i_block_count = 0;
+    demux_sys_t        *p_sys = p_demux->p_sys;
+    matroska_segment_t *p_segment = p_sys->p_current_segment->Segment();
+    if ( p_segment == NULL ) return 0;
+    int                i_block_count = 0;
 
     KaxBlock *block;
     int64_t i_block_duration;
@@ -1693,28 +1823,55 @@ static int Demux( demux_t *p_demux)
         if( p_sys->i_pts >= p_sys->i_start_pts  )
             UpdateCurrentToChapter( *p_demux );
         
-        if ( p_sys->editions.size() && p_sys->editions[p_sys->i_current_edition].b_ordered && p_sys->psz_current_chapter == NULL )
+        if ( p_segment->editions.size() && p_segment->editions[p_segment->i_current_edition].b_ordered && p_segment->psz_current_chapter == NULL )
         {
             /* nothing left to read in this ordered edition */
-            return 0;
+            if ( !p_sys->p_current_segment->SelectNext() )
+                return 0;
+            p_segment->UnSelect( );
+            
+            es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
+
+            /* switch to the next segment */
+            p_segment = p_sys->p_current_segment->Segment();
+            if ( !p_segment->Select( 0 ) )
+            {
+                msg_Err( p_demux, "Failed to select new segment" );
+                return 0;
+            }
+            continue;
         }
 
-        if( BlockGet( p_demux, &block, &i_block_ref1, &i_block_ref2, &i_block_duration ) )
+        if( p_segment->BlockGet( &block, &i_block_ref1, &i_block_ref2, &i_block_duration ) )
         {
-            if ( p_sys->editions.size() && p_sys->editions[p_sys->i_current_edition].b_ordered )
+            if ( p_segment->editions.size() && p_segment->editions[p_segment->i_current_edition].b_ordered )
             {
                 // check if there are more chapters to read
-                if ( p_sys->psz_current_chapter != NULL )
+                if ( p_segment->psz_current_chapter != NULL )
                 {
-                    p_sys->i_pts = p_sys->psz_current_chapter->i_user_end_time;
+                    p_sys->i_pts = p_segment->psz_current_chapter->i_user_end_time;
                     return 1;
                 }
 
                 return 0;
             }
             msg_Warn( p_demux, "cannot get block EOF?" );
+            p_segment->UnSelect( );
+            
+            es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 
-            return 0;
+            /* switch to the next segment */
+            if ( !p_sys->p_current_segment->SelectNext() )
+                // no more segments in this stream
+                return 0;
+            p_segment = p_sys->p_current_segment->Segment();
+            if ( !p_segment->Select( 0 ) )
+            {
+                msg_Err( p_demux, "Failed to select new segment" );
+                return 0;
+            }
+
+            continue;
         }
 
         p_sys->i_pts = p_sys->i_chapter_time + block->GlobalTimecode() / (mtime_t) 1000;
@@ -1861,6 +2018,23 @@ int EbmlParser::GetLevel( void )
     return mi_user_level;
 }
 
+void EbmlParser::Reset( void )
+{
+    while ( mi_level > 0)
+    {
+        delete m_el[mi_level];
+        m_el[mi_level] = NULL;
+        mi_level--;
+    }
+    mi_user_level = mi_level = 1;
+#if LIBEBML_VERSION >= 0x000704
+    // a little faster and cleaner
+    m_es->I_O().setFilePointer( static_cast<KaxSegment*>(m_el[0])->GetGlobalPosition(0) );
+#else
+    m_es->I_O().setFilePointer( m_el[0]->GetElementPosition() + m_el[0]->ElementSize(true) - m_el[0]->GetSize() );
+#endif
+}
+
 EbmlElement *EbmlParser::Get( void )
 {
     int i_ulev = 0;
@@ -1925,30 +2099,39 @@ EbmlElement *EbmlParser::Get( void )
  *  * InformationCreate : create all information, load tags if present
  *
  *****************************************************************************/
-static void LoadCues( demux_t *p_demux )
+void matroska_segment_t::LoadCues( )
 {
-    demux_sys_t *p_sys = p_demux->p_sys;
-    int64_t     i_sav_position = p_sys->in->getFilePointer();
+    int64_t     i_sav_position = es.I_O().getFilePointer();
     EbmlParser  *ep;
     EbmlElement *el, *cues;
 
-    msg_Dbg( p_demux, "loading cues" );
-    p_sys->in->setFilePointer( p_sys->i_cues_position, seek_beginning );
-    cues = p_sys->es->FindNextID( KaxCues::ClassInfos, 0xFFFFFFFFL);
+    /* *** Load the cue if found *** */
+    if( i_cues_position < 0 )
+        return;
+
+    vlc_bool_t b_seekable;
+
+    stream_Control( sys.demuxer.s, STREAM_CAN_FASTSEEK, &b_seekable );
+    if( !b_seekable )
+        return;
+
+    msg_Dbg( &sys.demuxer, "loading cues" );
+    es.I_O().setFilePointer( i_cues_position, seek_beginning );
+    cues = es.FindNextID( KaxCues::ClassInfos, 0xFFFFFFFFL);
 
     if( cues == NULL )
     {
-        msg_Err( p_demux, "cannot load cues (broken seekhead or file)" );
-        p_sys->in->setFilePointer( i_sav_position, seek_beginning );
+        msg_Err( &sys.demuxer, "cannot load cues (broken seekhead or file)" );
+        es.I_O().setFilePointer( i_sav_position, seek_beginning );
         return;
     }
 
-    ep = new EbmlParser( p_sys->es, cues );
+    ep = new EbmlParser( &es, cues );
     while( ( el = ep->Get() ) != NULL )
     {
         if( MKV_IS_ID( el, KaxCuePoint ) )
         {
-#define idx p_sys->index[p_sys->i_index]
+#define idx index[i_index]
 
             idx.i_track       = -1;
             idx.i_block_number= -1;
@@ -1963,9 +2146,9 @@ static void LoadCues( demux_t *p_demux )
                 {
                     KaxCueTime &ctime = *(KaxCueTime*)el;
 
-                    ctime.ReadData( p_sys->es->I_O() );
+                    ctime.ReadData( es.I_O() );
 
-                    idx.i_time = uint64( ctime ) * p_sys->i_timescale / (mtime_t)1000;
+                    idx.i_time = uint64( ctime ) * i_timescale / (mtime_t)1000;
                 }
                 else if( MKV_IS_ID( el, KaxCueTrackPositions ) )
                 {
@@ -1976,206 +2159,204 @@ static void LoadCues( demux_t *p_demux )
                         {
                             KaxCueTrack &ctrack = *(KaxCueTrack*)el;
 
-                            ctrack.ReadData( p_sys->es->I_O() );
+                            ctrack.ReadData( es.I_O() );
                             idx.i_track = uint16( ctrack );
                         }
                         else if( MKV_IS_ID( el, KaxCueClusterPosition ) )
                         {
                             KaxCueClusterPosition &ccpos = *(KaxCueClusterPosition*)el;
 
-                            ccpos.ReadData( p_sys->es->I_O() );
-                            idx.i_position = p_sys->segment->GetGlobalPosition( uint64( ccpos ) );
+                            ccpos.ReadData( es.I_O() );
+                            idx.i_position = segment->GetGlobalPosition( uint64( ccpos ) );
                         }
                         else if( MKV_IS_ID( el, KaxCueBlockNumber ) )
                         {
                             KaxCueBlockNumber &cbnum = *(KaxCueBlockNumber*)el;
 
-                            cbnum.ReadData( p_sys->es->I_O() );
+                            cbnum.ReadData( es.I_O() );
                             idx.i_block_number = uint32( cbnum );
                         }
                         else
                         {
-                            msg_Dbg( p_demux, "         * Unknown (%s)", typeid(*el).name() );
+                            msg_Dbg( &sys.demuxer, "         * Unknown (%s)", typeid(*el).name() );
                         }
                     }
                     ep->Up();
                 }
                 else
                 {
-                    msg_Dbg( p_demux, "     * Unknown (%s)", typeid(*el).name() );
+                    msg_Dbg( &sys.demuxer, "     * Unknown (%s)", typeid(*el).name() );
                 }
             }
             ep->Up();
 
 #if 0
-            msg_Dbg( p_demux, " * added time="I64Fd" pos="I64Fd
+            msg_Dbg( &sys.demuxer, " * added time="I64Fd" pos="I64Fd
                      " track=%d bnum=%d", idx.i_time, idx.i_position,
                      idx.i_track, idx.i_block_number );
 #endif
 
-            p_sys->i_index++;
-            if( p_sys->i_index >= p_sys->i_index_max )
+            i_index++;
+            if( i_index >= i_index_max )
             {
-                p_sys->i_index_max += 1024;
-                p_sys->index = (mkv_index_t*)realloc( p_sys->index, sizeof( mkv_index_t ) * p_sys->i_index_max );
+                i_index_max += 1024;
+                index = (mkv_index_t*)realloc( index, sizeof( mkv_index_t ) * i_index_max );
             }
 #undef idx
         }
         else
         {
-            msg_Dbg( p_demux, " * Unknown (%s)", typeid(*el).name() );
+            msg_Dbg( &sys.demuxer, " * Unknown (%s)", typeid(*el).name() );
         }
     }
     delete ep;
     delete cues;
 
-    p_sys->b_cues = VLC_TRUE;
+    b_cues = VLC_TRUE;
 
-    msg_Dbg( p_demux, "loading cues done." );
-    p_sys->in->setFilePointer( i_sav_position, seek_beginning );
+    msg_Dbg( &sys.demuxer, "loading cues done." );
+    es.I_O().setFilePointer( i_sav_position, seek_beginning );
 }
 
-static void LoadTags( demux_t *p_demux )
+void matroska_segment_t::LoadTags( )
 {
-    demux_sys_t *p_sys = p_demux->p_sys;
-    int64_t     i_sav_position = p_sys->in->getFilePointer();
+    int64_t     i_sav_position = es.I_O().getFilePointer();
     EbmlParser  *ep;
     EbmlElement *el, *tags;
 
-    msg_Dbg( p_demux, "loading tags" );
-    p_sys->in->setFilePointer( p_sys->i_tags_position, seek_beginning );
-    tags = p_sys->es->FindNextID( KaxTags::ClassInfos, 0xFFFFFFFFL);
+    msg_Dbg( &sys.demuxer, "loading tags" );
+    es.I_O().setFilePointer( i_tags_position, seek_beginning );
+    tags = es.FindNextID( KaxTags::ClassInfos, 0xFFFFFFFFL);
 
     if( tags == NULL )
     {
-        msg_Err( p_demux, "cannot load tags (broken seekhead or file)" );
-        p_sys->in->setFilePointer( i_sav_position, seek_beginning );
+        msg_Err( &sys.demuxer, "cannot load tags (broken seekhead or file)" );
+        es.I_O().setFilePointer( i_sav_position, seek_beginning );
         return;
     }
 
-    msg_Dbg( p_demux, "Tags" );
-    ep = new EbmlParser( p_sys->es, tags );
+    msg_Dbg( &sys.demuxer, "Tags" );
+    ep = new EbmlParser( &es, tags );
     while( ( el = ep->Get() ) != NULL )
     {
         if( MKV_IS_ID( el, KaxTag ) )
         {
-            msg_Dbg( p_demux, "+ Tag" );
+            msg_Dbg( &sys.demuxer, "+ Tag" );
             ep->Down();
             while( ( el = ep->Get() ) != NULL )
             {
                 if( MKV_IS_ID( el, KaxTagTargets ) )
                 {
-                    msg_Dbg( p_demux, "|   + Targets" );
+                    msg_Dbg( &sys.demuxer, "|   + Targets" );
                     ep->Down();
                     while( ( el = ep->Get() ) != NULL )
                     {
-                        msg_Dbg( p_demux, "|   |   + Unknown (%s)", typeid( *el ).name() );
+                        msg_Dbg( &sys.demuxer, "|   |   + Unknown (%s)", typeid( *el ).name() );
                     }
                     ep->Up();
                 }
                 else if( MKV_IS_ID( el, KaxTagGeneral ) )
                 {
-                    msg_Dbg( p_demux, "|   + General" );
+                    msg_Dbg( &sys.demuxer, "|   + General" );
                     ep->Down();
                     while( ( el = ep->Get() ) != NULL )
                     {
-                        msg_Dbg( p_demux, "|   |   + Unknown (%s)", typeid( *el ).name() );
+                        msg_Dbg( &sys.demuxer, "|   |   + Unknown (%s)", typeid( *el ).name() );
                     }
                     ep->Up();
                 }
                 else if( MKV_IS_ID( el, KaxTagGenres ) )
                 {
-                    msg_Dbg( p_demux, "|   + Genres" );
+                    msg_Dbg( &sys.demuxer, "|   + Genres" );
                     ep->Down();
                     while( ( el = ep->Get() ) != NULL )
                     {
-                        msg_Dbg( p_demux, "|   |   + Unknown (%s)", typeid( *el ).name() );
+                        msg_Dbg( &sys.demuxer, "|   |   + Unknown (%s)", typeid( *el ).name() );
                     }
                     ep->Up();
                 }
                 else if( MKV_IS_ID( el, KaxTagAudioSpecific ) )
                 {
-                    msg_Dbg( p_demux, "|   + Audio Specific" );
+                    msg_Dbg( &sys.demuxer, "|   + Audio Specific" );
                     ep->Down();
                     while( ( el = ep->Get() ) != NULL )
                     {
-                        msg_Dbg( p_demux, "|   |   + Unknown (%s)", typeid( *el ).name() );
+                        msg_Dbg( &sys.demuxer, "|   |   + Unknown (%s)", typeid( *el ).name() );
                     }
                     ep->Up();
                 }
                 else if( MKV_IS_ID( el, KaxTagImageSpecific ) )
                 {
-                    msg_Dbg( p_demux, "|   + Images Specific" );
+                    msg_Dbg( &sys.demuxer, "|   + Images Specific" );
                     ep->Down();
                     while( ( el = ep->Get() ) != NULL )
                     {
-                        msg_Dbg( p_demux, "|   |   + Unknown (%s)", typeid( *el ).name() );
+                        msg_Dbg( &sys.demuxer, "|   |   + Unknown (%s)", typeid( *el ).name() );
                     }
                     ep->Up();
                 }
                 else if( MKV_IS_ID( el, KaxTagMultiComment ) )
                 {
-                    msg_Dbg( p_demux, "|   + Multi Comment" );
+                    msg_Dbg( &sys.demuxer, "|   + Multi Comment" );
                 }
                 else if( MKV_IS_ID( el, KaxTagMultiCommercial ) )
                 {
-                    msg_Dbg( p_demux, "|   + Multi Commercial" );
+                    msg_Dbg( &sys.demuxer, "|   + Multi Commercial" );
                 }
                 else if( MKV_IS_ID( el, KaxTagMultiDate ) )
                 {
-                    msg_Dbg( p_demux, "|   + Multi Date" );
+                    msg_Dbg( &sys.demuxer, "|   + Multi Date" );
                 }
                 else if( MKV_IS_ID( el, KaxTagMultiEntity ) )
                 {
-                    msg_Dbg( p_demux, "|   + Multi Entity" );
+                    msg_Dbg( &sys.demuxer, "|   + Multi Entity" );
                 }
                 else if( MKV_IS_ID( el, KaxTagMultiIdentifier ) )
                 {
-                    msg_Dbg( p_demux, "|   + Multi Identifier" );
+                    msg_Dbg( &sys.demuxer, "|   + Multi Identifier" );
                 }
                 else if( MKV_IS_ID( el, KaxTagMultiLegal ) )
                 {
-                    msg_Dbg( p_demux, "|   + Multi Legal" );
+                    msg_Dbg( &sys.demuxer, "|   + Multi Legal" );
                 }
                 else if( MKV_IS_ID( el, KaxTagMultiTitle ) )
                 {
-                    msg_Dbg( p_demux, "|   + Multi Title" );
+                    msg_Dbg( &sys.demuxer, "|   + Multi Title" );
                 }
                 else
                 {
-                    msg_Dbg( p_demux, "|   + Unknown (%s)", typeid( *el ).name() );
+                    msg_Dbg( &sys.demuxer, "|   + Unknown (%s)", typeid( *el ).name() );
                 }
             }
             ep->Up();
         }
         else
         {
-            msg_Dbg( p_demux, "+ Unknown (%s)", typeid( *el ).name() );
+            msg_Dbg( &sys.demuxer, "+ Unknown (%s)", typeid( *el ).name() );
         }
     }
     delete ep;
     delete tags;
 
-    msg_Dbg( p_demux, "loading tags done." );
-    p_sys->in->setFilePointer( i_sav_position, seek_beginning );
+    msg_Dbg( &sys.demuxer, "loading tags done." );
+    es.I_O().setFilePointer( i_sav_position, seek_beginning );
 }
 
 /*****************************************************************************
- * ParseInfo:
+ * ParseSeekHead:
  *****************************************************************************/
-static void ParseSeekHead( demux_t *p_demux, EbmlElement *seekhead )
+void matroska_segment_t::ParseSeekHead( EbmlElement *seekhead )
 {
-    demux_sys_t *p_sys = p_demux->p_sys;
     EbmlElement *el;
     EbmlMaster  *m;
     unsigned int i;
     int i_upper_level = 0;
 
-    msg_Dbg( p_demux, "|   + Seek head" );
+    msg_Dbg( &sys.demuxer, "|   + Seek head" );
 
     /* Master elements */
     m = static_cast<EbmlMaster *>(seekhead);
-    m->Read( *p_sys->es, seekhead->Generic().Context, i_upper_level, el, true );
+    m->Read( es, seekhead->Generic().Context, i_upper_level, el, true );
 
     for( i = 0; i < m->ListSize(); i++ )
     {
@@ -2205,7 +2386,7 @@ static void ParseSeekHead( demux_t *p_demux, EbmlElement *seekhead )
                 }
                 else
                 {
-                    msg_Dbg( p_demux, "|   |   |   + Unknown (%s)", typeid(*l).name() );
+                    msg_Dbg( &sys.demuxer, "|   |   |   + Unknown (%s)", typeid(*l).name() );
                 }
             }
 
@@ -2213,46 +2394,43 @@ static void ParseSeekHead( demux_t *p_demux, EbmlElement *seekhead )
             {
                 if( id == KaxCues::ClassInfos.GlobalId )
                 {
-                    msg_Dbg( p_demux, "|   |   |   = cues at "I64Fd, i_pos );
-                    p_sys->i_cues_position = p_sys->segment->GetGlobalPosition( i_pos );
+                    msg_Dbg( &sys.demuxer, "|   |   |   = cues at "I64Fd, i_pos );
+                    i_cues_position = segment->GetGlobalPosition( i_pos );
                 }
                 else if( id == KaxChapters::ClassInfos.GlobalId )
                 {
-                    msg_Dbg( p_demux, "|   |   |   = chapters at "I64Fd, i_pos );
-                    p_sys->i_chapters_position = p_sys->segment->GetGlobalPosition( i_pos );
+                    msg_Dbg( &sys.demuxer, "|   |   |   = chapters at "I64Fd, i_pos );
+                    i_chapters_position = segment->GetGlobalPosition( i_pos );
                 }
                 else if( id == KaxTags::ClassInfos.GlobalId )
                 {
-                    msg_Dbg( p_demux, "|   |   |   = tags at "I64Fd, i_pos );
-                    p_sys->i_tags_position = p_sys->segment->GetGlobalPosition( i_pos );
+                    msg_Dbg( &sys.demuxer, "|   |   |   = tags at "I64Fd, i_pos );
+                    i_tags_position = segment->GetGlobalPosition( i_pos );
                 }
             }
         }
         else
         {
-            msg_Dbg( p_demux, "|   |   + Unknown (%s)", typeid(*l).name() );
+            msg_Dbg( &sys.demuxer, "|   |   + Unknown (%s)", typeid(*l).name() );
         }
     }
 }
 
 /*****************************************************************************
- * ParseTracks:
+ * ParseTrackEntry:
  *****************************************************************************/
-static void ParseTrackEntry( demux_t *p_demux, EbmlMaster *m )
+void matroska_segment_t::ParseTrackEntry( EbmlMaster *m )
 {
-    demux_sys_t *p_sys = p_demux->p_sys;
     unsigned int i;
 
     mkv_track_t *tk;
 
-    msg_Dbg( p_demux, "|   |   + Track Entry" );
+    msg_Dbg( &sys.demuxer, "|   |   + Track Entry" );
 
-    p_sys->i_track++;
-    p_sys->track = (mkv_track_t*)realloc( p_sys->track, sizeof( mkv_track_t ) * (p_sys->i_track + 1 ) );
+    tk = new mkv_track_t();
+    tracks.push_back( tk );
 
     /* Init the track */
-    tk = &p_sys->track[p_sys->i_track - 1];
-
     memset( tk, 0, sizeof( mkv_track_t ) );
 
     es_format_Init( &tk->fmt, UNKNOWN_ES, 0 );
@@ -2261,7 +2439,8 @@ static void ParseTrackEntry( demux_t *p_demux, EbmlMaster *m )
 
     tk->b_default = VLC_TRUE;
     tk->b_enabled = VLC_TRUE;
-    tk->i_number = p_sys->i_track - 1;
+    tk->b_silent = VLC_FALSE;
+    tk->i_number = tracks.size() - 1;
     tk->i_extra_data = 0;
     tk->p_extra_data = NULL;
     tk->psz_codec = NULL;
@@ -2288,13 +2467,13 @@ static void ParseTrackEntry( demux_t *p_demux, EbmlMaster *m )
             KaxTrackNumber &tnum = *(KaxTrackNumber*)l;
 
             tk->i_number = uint32( tnum );
-            msg_Dbg( p_demux, "|   |   |   + Track Number=%u", uint32( tnum ) );
+            msg_Dbg( &sys.demuxer, "|   |   |   + Track Number=%u", uint32( tnum ) );
         }
         else  if( MKV_IS_ID( l, KaxTrackUID ) )
         {
             KaxTrackUID &tuid = *(KaxTrackUID*)l;
 
-            msg_Dbg( p_demux, "|   |   |   + Track UID=%u",  uint32( tuid ) );
+            msg_Dbg( &sys.demuxer, "|   |   |   + Track UID=%u",  uint32( tuid ) );
         }
         else  if( MKV_IS_ID( l, KaxTrackType ) )
         {
@@ -2321,14 +2500,14 @@ static void ParseTrackEntry( demux_t *p_demux, EbmlMaster *m )
                     break;
             }
 
-            msg_Dbg( p_demux, "|   |   |   + Track Type=%s", psz_type );
+            msg_Dbg( &sys.demuxer, "|   |   |   + Track Type=%s", psz_type );
         }
 //        else  if( EbmlId( *l ) == KaxTrackFlagEnabled::ClassInfos.GlobalId )
 //        {
 //            KaxTrackFlagEnabled &fenb = *(KaxTrackFlagEnabled*)l;
 
 //            tk->b_enabled = uint32( fenb );
-//            msg_Dbg( p_demux, "|   |   |   + Track Enabled=%u",
+//            msg_Dbg( &sys.demuxer, "|   |   |   + Track Enabled=%u",
 //                     uint32( fenb )  );
 //        }
         else  if( MKV_IS_ID( l, KaxTrackFlagDefault ) )
@@ -2336,53 +2515,53 @@ static void ParseTrackEntry( demux_t *p_demux, EbmlMaster *m )
             KaxTrackFlagDefault &fdef = *(KaxTrackFlagDefault*)l;
 
             tk->b_default = uint32( fdef );
-            msg_Dbg( p_demux, "|   |   |   + Track Default=%u", uint32( fdef )  );
+            msg_Dbg( &sys.demuxer, "|   |   |   + Track Default=%u", uint32( fdef )  );
         }
         else  if( MKV_IS_ID( l, KaxTrackFlagLacing ) )
         {
             KaxTrackFlagLacing &lac = *(KaxTrackFlagLacing*)l;
 
-            msg_Dbg( p_demux, "|   |   |   + Track Lacing=%d", uint32( lac ) );
+            msg_Dbg( &sys.demuxer, "|   |   |   + Track Lacing=%d", uint32( lac ) );
         }
         else  if( MKV_IS_ID( l, KaxTrackMinCache ) )
         {
             KaxTrackMinCache &cmin = *(KaxTrackMinCache*)l;
 
-            msg_Dbg( p_demux, "|   |   |   + Track MinCache=%d", uint32( cmin ) );
+            msg_Dbg( &sys.demuxer, "|   |   |   + Track MinCache=%d", uint32( cmin ) );
         }
         else  if( MKV_IS_ID( l, KaxTrackMaxCache ) )
         {
             KaxTrackMaxCache &cmax = *(KaxTrackMaxCache*)l;
 
-            msg_Dbg( p_demux, "|   |   |   + Track MaxCache=%d", uint32( cmax ) );
+            msg_Dbg( &sys.demuxer, "|   |   |   + Track MaxCache=%d", uint32( cmax ) );
         }
         else  if( MKV_IS_ID( l, KaxTrackDefaultDuration ) )
         {
             KaxTrackDefaultDuration &defd = *(KaxTrackDefaultDuration*)l;
 
             tk->i_default_duration = uint64(defd);
-            msg_Dbg( p_demux, "|   |   |   + Track Default Duration="I64Fd, uint64(defd) );
+            msg_Dbg( &sys.demuxer, "|   |   |   + Track Default Duration="I64Fd, uint64(defd) );
         }
         else  if( MKV_IS_ID( l, KaxTrackTimecodeScale ) )
         {
             KaxTrackTimecodeScale &ttcs = *(KaxTrackTimecodeScale*)l;
 
             tk->f_timecodescale = float( ttcs );
-            msg_Dbg( p_demux, "|   |   |   + Track TimeCodeScale=%f", tk->f_timecodescale );
+            msg_Dbg( &sys.demuxer, "|   |   |   + Track TimeCodeScale=%f", tk->f_timecodescale );
         }
         else if( MKV_IS_ID( l, KaxTrackName ) )
         {
             KaxTrackName &tname = *(KaxTrackName*)l;
 
             tk->fmt.psz_description = UTF8ToStr( UTFstring( tname ) );
-            msg_Dbg( p_demux, "|   |   |   + Track Name=%s", tk->fmt.psz_description );
+            msg_Dbg( &sys.demuxer, "|   |   |   + Track Name=%s", tk->fmt.psz_description );
         }
         else  if( MKV_IS_ID( l, KaxTrackLanguage ) )
         {
             KaxTrackLanguage &lang = *(KaxTrackLanguage*)l;
 
             tk->fmt.psz_language = strdup( string( lang ).c_str() );
-            msg_Dbg( p_demux,
+            msg_Dbg( &sys.demuxer,
                      "|   |   |   + Track Language=`%s'", tk->fmt.psz_language );
         }
         else  if( MKV_IS_ID( l, KaxCodecID ) )
@@ -2390,7 +2569,7 @@ static void ParseTrackEntry( demux_t *p_demux, EbmlMaster *m )
             KaxCodecID &codecid = *(KaxCodecID*)l;
 
             tk->psz_codec = strdup( string( codecid ).c_str() );
-            msg_Dbg( p_demux, "|   |   |   + Track CodecId=%s", string( codecid ).c_str() );
+            msg_Dbg( &sys.demuxer, "|   |   |   + Track CodecId=%s", string( codecid ).c_str() );
         }
         else  if( MKV_IS_ID( l, KaxCodecPrivate ) )
         {
@@ -2402,25 +2581,25 @@ static void ParseTrackEntry( demux_t *p_demux, EbmlMaster *m )
                 tk->p_extra_data = (uint8_t*)malloc( tk->i_extra_data );
                 memcpy( tk->p_extra_data, cpriv.GetBuffer(), tk->i_extra_data );
             }
-            msg_Dbg( p_demux, "|   |   |   + Track CodecPrivate size="I64Fd, cpriv.GetSize() );
+            msg_Dbg( &sys.demuxer, "|   |   |   + Track CodecPrivate size="I64Fd, cpriv.GetSize() );
         }
         else if( MKV_IS_ID( l, KaxCodecName ) )
         {
             KaxCodecName &cname = *(KaxCodecName*)l;
 
             tk->psz_codec_name = UTF8ToStr( UTFstring( cname ) );
-            msg_Dbg( p_demux, "|   |   |   + Track Codec Name=%s", tk->psz_codec_name );
+            msg_Dbg( &sys.demuxer, "|   |   |   + Track Codec Name=%s", tk->psz_codec_name );
         }
         else if( MKV_IS_ID( l, KaxContentEncodings ) )
         {
             EbmlMaster *cencs = static_cast<EbmlMaster*>(l);
-            MkvTree( p_demux, 3, "Content Encodings" );
+            MkvTree( sys.demuxer, 3, "Content Encodings" );
             for( unsigned int i = 0; i < cencs->ListSize(); i++ )
             {
                 EbmlElement *l2 = (*cencs)[i];
                 if( MKV_IS_ID( l2, KaxContentEncoding ) )
                 {
-                    MkvTree( p_demux, 4, "Content Encoding" );
+                    MkvTree( sys.demuxer, 4, "Content Encoding" );
                     EbmlMaster *cenc = static_cast<EbmlMaster*>(l2);
                     for( unsigned int i = 0; i < cenc->ListSize(); i++ )
                     {
@@ -2428,29 +2607,29 @@ static void ParseTrackEntry( demux_t *p_demux, EbmlMaster *m )
                         if( MKV_IS_ID( l3, KaxContentEncodingOrder ) )
                         {
                             KaxContentEncodingOrder &encord = *(KaxContentEncodingOrder*)l3;
-                            MkvTree( p_demux, 5, "Order: %i", uint32( encord ) );
+                            MkvTree( sys.demuxer, 5, "Order: %i", uint32( encord ) );
                         }
                         else if( MKV_IS_ID( l3, KaxContentEncodingScope ) )
                         {
                             KaxContentEncodingScope &encscope = *(KaxContentEncodingScope*)l3;
-                            MkvTree( p_demux, 5, "Scope: %i", uint32( encscope ) );
+                            MkvTree( sys.demuxer, 5, "Scope: %i", uint32( encscope ) );
                         }
                         else if( MKV_IS_ID( l3, KaxContentEncodingType ) )
                         {
                             KaxContentEncodingType &enctype = *(KaxContentEncodingType*)l3;
-                            MkvTree( p_demux, 5, "Type: %i", uint32( enctype ) );
+                            MkvTree( sys.demuxer, 5, "Type: %i", uint32( enctype ) );
                         }
                         else if( MKV_IS_ID( l3, KaxContentCompression ) )
                         {
                             EbmlMaster *compr = static_cast<EbmlMaster*>(l3);
-                            MkvTree( p_demux, 5, "Content Compression" );
+                            MkvTree( sys.demuxer, 5, "Content Compression" );
                             for( unsigned int i = 0; i < compr->ListSize(); i++ )
                             {
                                 EbmlElement *l4 = (*compr)[i];
                                 if( MKV_IS_ID( l4, KaxContentCompAlgo ) )
                                 {
                                     KaxContentCompAlgo &compalg = *(KaxContentCompAlgo*)l4;
-                                    MkvTree( p_demux, 6, "Compression Algorithm: %i", uint32(compalg) );
+                                    MkvTree( sys.demuxer, 6, "Compression Algorithm: %i", uint32(compalg) );
                                     if( uint32( compalg ) == 0 )
                                     {
                                         tk->i_compression_type = MATROSKA_COMPRESSION_ZLIB;
@@ -2458,21 +2637,21 @@ static void ParseTrackEntry( demux_t *p_demux, EbmlMaster *m )
                                 }
                                 else
                                 {
-                                    MkvTree( p_demux, 6, "Unknown (%s)", typeid(*l4).name() );
+                                    MkvTree( sys.demuxer, 6, "Unknown (%s)", typeid(*l4).name() );
                                 }
                             }
                         }
 
                         else
                         {
-                            MkvTree( p_demux, 5, "Unknown (%s)", typeid(*l3).name() );
+                            MkvTree( sys.demuxer, 5, "Unknown (%s)", typeid(*l3).name() );
                         }
                     }
                     
                 }
                 else
                 {
-                    MkvTree( p_demux, 4, "Unknown (%s)", typeid(*l2).name() );
+                    MkvTree( sys.demuxer, 4, "Unknown (%s)", typeid(*l2).name() );
                 }
             }
                 
@@ -2482,40 +2661,40 @@ static void ParseTrackEntry( demux_t *p_demux, EbmlMaster *m )
 //            KaxCodecSettings &cset = *(KaxCodecSettings*)l;
 
 //            tk->psz_codec_settings = UTF8ToStr( UTFstring( cset ) );
-//            msg_Dbg( p_demux, "|   |   |   + Track Codec Settings=%s", tk->psz_codec_settings );
+//            msg_Dbg( &sys.demuxer, "|   |   |   + Track Codec Settings=%s", tk->psz_codec_settings );
 //        }
 //        else if( EbmlId( *l ) == KaxCodecInfoURL::ClassInfos.GlobalId )
 //        {
 //            KaxCodecInfoURL &ciurl = *(KaxCodecInfoURL*)l;
 
 //            tk->psz_codec_info_url = strdup( string( ciurl ).c_str() );
-//            msg_Dbg( p_demux, "|   |   |   + Track Codec Info URL=%s", tk->psz_codec_info_url );
+//            msg_Dbg( &sys.demuxer, "|   |   |   + Track Codec Info URL=%s", tk->psz_codec_info_url );
 //        }
 //        else if( EbmlId( *l ) == KaxCodecDownloadURL::ClassInfos.GlobalId )
 //        {
 //            KaxCodecDownloadURL &cdurl = *(KaxCodecDownloadURL*)l;
 
 //            tk->psz_codec_download_url = strdup( string( cdurl ).c_str() );
-//            msg_Dbg( p_demux, "|   |   |   + Track Codec Info URL=%s", tk->psz_codec_download_url );
+//            msg_Dbg( &sys.demuxer, "|   |   |   + Track Codec Info URL=%s", tk->psz_codec_download_url );
 //        }
 //        else if( EbmlId( *l ) == KaxCodecDecodeAll::ClassInfos.GlobalId )
 //        {
 //            KaxCodecDecodeAll &cdall = *(KaxCodecDecodeAll*)l;
 
-//            msg_Dbg( p_demux, "|   |   |   + Track Codec Decode All=%u <== UNUSED", uint8( cdall ) );
+//            msg_Dbg( &sys.demuxer, "|   |   |   + Track Codec Decode All=%u <== UNUSED", uint8( cdall ) );
 //        }
 //        else if( EbmlId( *l ) == KaxTrackOverlay::ClassInfos.GlobalId )
 //        {
 //            KaxTrackOverlay &tovr = *(KaxTrackOverlay*)l;
 
-//            msg_Dbg( p_demux, "|   |   |   + Track Overlay=%u <== UNUSED", uint32( tovr ) );
+//            msg_Dbg( &sys.demuxer, "|   |   |   + Track Overlay=%u <== UNUSED", uint32( tovr ) );
 //        }
         else  if( MKV_IS_ID( l, KaxTrackVideo ) )
         {
             EbmlMaster *tkv = static_cast<EbmlMaster*>(l);
             unsigned int j;
 
-            msg_Dbg( p_demux, "|   |   |   + Track Video" );
+            msg_Dbg( &sys.demuxer, "|   |   |   + Track Video" );
             tk->f_fps = 0.0;
 
             for( j = 0; j < tkv->ListSize(); j++ )
@@ -2525,13 +2704,13 @@ static void ParseTrackEntry( demux_t *p_demux, EbmlMaster *m )
 //                {
 //                    KaxVideoFlagInterlaced &fint = *(KaxVideoFlagInterlaced*)el4;
 
-//                    msg_Dbg( p_demux, "|   |   |   |   + Track Video Interlaced=%u", uint8( fint ) );
+//                    msg_Dbg( &sys.demuxer, "|   |   |   |   + Track Video Interlaced=%u", uint8( fint ) );
 //                }
 //                else if( EbmlId( *el4 ) == KaxVideoStereoMode::ClassInfos.GlobalId )
 //                {
 //                    KaxVideoStereoMode &stereo = *(KaxVideoStereoMode*)el4;
 
-//                    msg_Dbg( p_demux, "|   |   |   |   + Track Video Stereo Mode=%u", uint8( stereo ) );
+//                    msg_Dbg( &sys.demuxer, "|   |   |   |   + Track Video Stereo Mode=%u", uint8( stereo ) );
 //                }
 //                else
                 if( MKV_IS_ID( l, KaxVideoPixelWidth ) )
@@ -2539,67 +2718,69 @@ static void ParseTrackEntry( demux_t *p_demux, EbmlMaster *m )
                     KaxVideoPixelWidth &vwidth = *(KaxVideoPixelWidth*)l;
 
                     tk->fmt.video.i_width = uint16( vwidth );
-                    msg_Dbg( p_demux, "|   |   |   |   + width=%d", uint16( vwidth ) );
+                    msg_Dbg( &sys.demuxer, "|   |   |   |   + width=%d", uint16( vwidth ) );
                 }
                 else if( MKV_IS_ID( l, KaxVideoPixelHeight ) )
                 {
                     KaxVideoPixelWidth &vheight = *(KaxVideoPixelWidth*)l;
 
                     tk->fmt.video.i_height = uint16( vheight );
-                    msg_Dbg( p_demux, "|   |   |   |   + height=%d", uint16( vheight ) );
+                    msg_Dbg( &sys.demuxer, "|   |   |   |   + height=%d", uint16( vheight ) );
                 }
                 else if( MKV_IS_ID( l, KaxVideoDisplayWidth ) )
                 {
                     KaxVideoDisplayWidth &vwidth = *(KaxVideoDisplayWidth*)l;
 
                     tk->fmt.video.i_visible_width = uint16( vwidth );
-                    msg_Dbg( p_demux, "|   |   |   |   + display width=%d", uint16( vwidth ) );
+                    msg_Dbg( &sys.demuxer, "|   |   |   |   + display width=%d", uint16( vwidth ) );
                 }
                 else if( MKV_IS_ID( l, KaxVideoDisplayHeight ) )
                 {
                     KaxVideoDisplayWidth &vheight = *(KaxVideoDisplayWidth*)l;
 
                     tk->fmt.video.i_visible_height = uint16( vheight );
-                    msg_Dbg( p_demux, "|   |   |   |   + display height=%d", uint16( vheight ) );
+                    msg_Dbg( &sys.demuxer, "|   |   |   |   + display height=%d", uint16( vheight ) );
                 }
                 else if( MKV_IS_ID( l, KaxVideoFrameRate ) )
                 {
                     KaxVideoFrameRate &vfps = *(KaxVideoFrameRate*)l;
 
                     tk->f_fps = float( vfps );
-                    msg_Dbg( p_demux, "   |   |   |   + fps=%f", float( vfps ) );
+                    msg_Dbg( &sys.demuxer, "   |   |   |   + fps=%f", float( vfps ) );
                 }
 //                else if( EbmlId( *l ) == KaxVideoDisplayUnit::ClassInfos.GlobalId )
 //                {
 //                     KaxVideoDisplayUnit &vdmode = *(KaxVideoDisplayUnit*)l;
 
-//                    msg_Dbg( p_demux, "|   |   |   |   + Track Video Display Unit=%s",
+//                    msg_Dbg( &sys.demuxer, "|   |   |   |   + Track Video Display Unit=%s",
 //                             uint8( vdmode ) == 0 ? "pixels" : ( uint8( vdmode ) == 1 ? "centimeters": "inches" ) );
 //                }
 //                else if( EbmlId( *l ) == KaxVideoAspectRatio::ClassInfos.GlobalId )
 //                {
 //                    KaxVideoAspectRatio &ratio = *(KaxVideoAspectRatio*)l;
 
-//                    msg_Dbg( p_demux, "   |   |   |   + Track Video Aspect Ratio Type=%u", uint8( ratio ) );
+//                    msg_Dbg( &sys.demuxer, "   |   |   |   + Track Video Aspect Ratio Type=%u", uint8( ratio ) );
 //                }
 //                else if( EbmlId( *l ) == KaxVideoGamma::ClassInfos.GlobalId )
 //                {
 //                    KaxVideoGamma &gamma = *(KaxVideoGamma*)l;
 
-//                    msg_Dbg( p_demux, "   |   |   |   + fps=%f", float( gamma ) );
+//                    msg_Dbg( &sys.demuxer, "   |   |   |   + fps=%f", float( gamma ) );
 //                }
                 else
                 {
-                    msg_Dbg( p_demux, "|   |   |   |   + Unknown (%s)", typeid(*l).name() );
+                    msg_Dbg( &sys.demuxer, "|   |   |   |   + Unknown (%s)", typeid(*l).name() );
                 }
             }
+            if ( tk->fmt.video.i_visible_height && tk->fmt.video.i_visible_width )
+                tk->fmt.video.i_aspect = VOUT_ASPECT_FACTOR * tk->fmt.video.i_visible_width / tk->fmt.video.i_visible_height;
         }
         else  if( MKV_IS_ID( l, KaxTrackAudio ) )
         {
             EbmlMaster *tka = static_cast<EbmlMaster*>(l);
             unsigned int j;
 
-            msg_Dbg( p_demux, "|   |   |   + Track Audio" );
+            msg_Dbg( &sys.demuxer, "|   |   |   + Track Audio" );
 
             for( j = 0; j < tka->ListSize(); j++ )
             {
@@ -2610,49 +2791,51 @@ static void ParseTrackEntry( demux_t *p_demux, EbmlMaster *m )
                     KaxAudioSamplingFreq &afreq = *(KaxAudioSamplingFreq*)l;
 
                     tk->fmt.audio.i_rate = (int)float( afreq );
-                    msg_Dbg( p_demux, "|   |   |   |   + afreq=%d", tk->fmt.audio.i_rate );
+                    msg_Dbg( &sys.demuxer, "|   |   |   |   + afreq=%d", tk->fmt.audio.i_rate );
                 }
                 else if( MKV_IS_ID( l, KaxAudioChannels ) )
                 {
                     KaxAudioChannels &achan = *(KaxAudioChannels*)l;
 
                     tk->fmt.audio.i_channels = uint8( achan );
-                    msg_Dbg( p_demux, "|   |   |   |   + achan=%u", uint8( achan ) );
+                    msg_Dbg( &sys.demuxer, "|   |   |   |   + achan=%u", uint8( achan ) );
                 }
                 else if( MKV_IS_ID( l, KaxAudioBitDepth ) )
                 {
                     KaxAudioBitDepth &abits = *(KaxAudioBitDepth*)l;
 
                     tk->fmt.audio.i_bitspersample = uint8( abits );
-                    msg_Dbg( p_demux, "|   |   |   |   + abits=%u", uint8( abits ) );
+                    msg_Dbg( &sys.demuxer, "|   |   |   |   + abits=%u", uint8( abits ) );
                 }
                 else
                 {
-                    msg_Dbg( p_demux, "|   |   |   |   + Unknown (%s)", typeid(*l).name() );
+                    msg_Dbg( &sys.demuxer, "|   |   |   |   + Unknown (%s)", typeid(*l).name() );
                 }
             }
         }
         else
         {
-            msg_Dbg( p_demux, "|   |   |   + Unknown (%s)",
+            msg_Dbg( &sys.demuxer, "|   |   |   + Unknown (%s)",
                      typeid(*l).name() );
         }
     }
 }
 
-static void ParseTracks( demux_t *p_demux, EbmlElement *tracks )
+/*****************************************************************************
+ * ParseTracks:
+ *****************************************************************************/
+void matroska_segment_t::ParseTracks( EbmlElement *tracks )
 {
-    demux_sys_t *p_sys = p_demux->p_sys;
     EbmlElement *el;
     EbmlMaster  *m;
     unsigned int i;
     int i_upper_level = 0;
 
-    msg_Dbg( p_demux, "|   + Tracks" );
+    msg_Dbg( &sys.demuxer, "|   + Tracks" );
 
     /* Master elements */
     m = static_cast<EbmlMaster *>(tracks);
-    m->Read( *p_sys->es, tracks->Generic().Context, i_upper_level, el, true );
+    m->Read( es, tracks->Generic().Context, i_upper_level, el, true );
 
     for( i = 0; i < m->ListSize(); i++ )
     {
@@ -2660,11 +2843,11 @@ static void ParseTracks( demux_t *p_demux, EbmlElement *tracks )
 
         if( MKV_IS_ID( l, KaxTrackEntry ) )
         {
-            ParseTrackEntry( p_demux, static_cast<EbmlMaster *>(l) );
+            ParseTrackEntry( static_cast<EbmlMaster *>(l) );
         }
         else
         {
-            msg_Dbg( p_demux, "|   |   + Unknown (%s)", typeid(*l).name() );
+            msg_Dbg( &sys.demuxer, "|   |   + Unknown (%s)", typeid(*l).name() );
         }
     }
 }
@@ -2672,19 +2855,18 @@ static void ParseTracks( demux_t *p_demux, EbmlElement *tracks )
 /*****************************************************************************
  * ParseInfo:
  *****************************************************************************/
-static void ParseInfo( demux_t *p_demux, EbmlElement *info )
+void matroska_segment_t::ParseInfo( EbmlElement *info )
 {
-    demux_sys_t *p_sys = p_demux->p_sys;
     EbmlElement *el;
     EbmlMaster  *m;
     unsigned int i;
     int i_upper_level = 0;
 
-    msg_Dbg( p_demux, "|   + Information" );
+    msg_Dbg( &sys.demuxer, "|   + Information" );
 
     /* Master elements */
     m = static_cast<EbmlMaster *>(info);
-    m->Read( *p_sys->es, info->Generic().Context, i_upper_level, el, true );
+    m->Read( es, info->Generic().Context, i_upper_level, el, true );
 
     for( i = 0; i < m->ListSize(); i++ )
     {
@@ -2692,70 +2874,82 @@ static void ParseInfo( demux_t *p_demux, EbmlElement *info )
 
         if( MKV_IS_ID( l, KaxSegmentUID ) )
         {
-            p_sys->segment_uid = *(new KaxSegmentUID(*static_cast<KaxSegmentUID*>(l)));
+            segment_uid = *(new KaxSegmentUID(*static_cast<KaxSegmentUID*>(l)));
+
+            msg_Dbg( &sys.demuxer, "|   |   + UID=%d", *(uint32*)segment_uid.GetBuffer() );
+        }
+        else if( MKV_IS_ID( l, KaxPrevUID ) )
+        {
+            prev_segment_uid = *(new KaxPrevUID(*static_cast<KaxPrevUID*>(l)));
+
+            msg_Dbg( &sys.demuxer, "|   |   + PrevUID=%d", *(uint32*)prev_segment_uid.GetBuffer() );
+        }
+        else if( MKV_IS_ID( l, KaxNextUID ) )
+        {
+            next_segment_uid = *(new KaxNextUID(*static_cast<KaxNextUID*>(l)));
 
-            msg_Dbg( p_demux, "|   |   + UID=%d", *(uint32*)p_sys->segment_uid.GetBuffer() );
+            msg_Dbg( &sys.demuxer, "|   |   + NextUID=%d", *(uint32*)next_segment_uid.GetBuffer() );
         }
         else if( MKV_IS_ID( l, KaxTimecodeScale ) )
         {
             KaxTimecodeScale &tcs = *(KaxTimecodeScale*)l;
 
-            p_sys->i_timescale = uint64(tcs);
+            i_timescale = uint64(tcs);
 
-            msg_Dbg( p_demux, "|   |   + TimecodeScale="I64Fd,
-                     p_sys->i_timescale );
+            msg_Dbg( &sys.demuxer, "|   |   + TimecodeScale="I64Fd,
+                     i_timescale );
         }
         else if( MKV_IS_ID( l, KaxDuration ) )
         {
             KaxDuration &dur = *(KaxDuration*)l;
 
-            p_sys->f_duration = float(dur);
+            f_duration = float(dur);
 
-            msg_Dbg( p_demux, "|   |   + Duration=%f",
-                     p_sys->f_duration );
+            msg_Dbg( &sys.demuxer, "|   |   + Duration=%f",
+                     f_duration );
         }
         else if( MKV_IS_ID( l, KaxMuxingApp ) )
         {
             KaxMuxingApp &mapp = *(KaxMuxingApp*)l;
 
-            p_sys->psz_muxing_application = UTF8ToStr( UTFstring( mapp ) );
+            psz_muxing_application = UTF8ToStr( UTFstring( mapp ) );
 
-            msg_Dbg( p_demux, "|   |   + Muxing Application=%s",
-                     p_sys->psz_muxing_application );
+            msg_Dbg( &sys.demuxer, "|   |   + Muxing Application=%s",
+                     psz_muxing_application );
         }
         else if( MKV_IS_ID( l, KaxWritingApp ) )
         {
             KaxWritingApp &wapp = *(KaxWritingApp*)l;
 
-            p_sys->psz_writing_application = UTF8ToStr( UTFstring( wapp ) );
+            psz_writing_application = UTF8ToStr( UTFstring( wapp ) );
 
-            msg_Dbg( p_demux, "|   |   + Writing Application=%s",
-                     p_sys->psz_writing_application );
+            msg_Dbg( &sys.demuxer, "|   |   + Writing Application=%s",
+                     psz_writing_application );
         }
         else if( MKV_IS_ID( l, KaxSegmentFilename ) )
         {
             KaxSegmentFilename &sfn = *(KaxSegmentFilename*)l;
 
-            p_sys->psz_segment_filename = UTF8ToStr( UTFstring( sfn ) );
+            psz_segment_filename = UTF8ToStr( UTFstring( sfn ) );
 
-            msg_Dbg( p_demux, "|   |   + Segment Filename=%s",
-                     p_sys->psz_segment_filename );
+            msg_Dbg( &sys.demuxer, "|   |   + Segment Filename=%s",
+                     psz_segment_filename );
         }
         else if( MKV_IS_ID( l, KaxTitle ) )
         {
             KaxTitle &title = *(KaxTitle*)l;
 
-            p_sys->psz_title = UTF8ToStr( UTFstring( title ) );
+            psz_title = UTF8ToStr( UTFstring( title ) );
 
-            msg_Dbg( p_demux, "|   |   + Title=%s", p_sys->psz_title );
+            msg_Dbg( &sys.demuxer, "|   |   + Title=%s", psz_title );
         }
-        if( MKV_IS_ID( l, KaxSegmentFamily ) )
+        else if( MKV_IS_ID( l, KaxSegmentFamily ) )
         {
             KaxSegmentFamily *uid = static_cast<KaxSegmentFamily*>(l);
 
-            p_sys->families.push_back(*uid);
+            families.push_back(*uid);
 
-            msg_Dbg( p_demux, "|   |   + family=%d", *(uint32*)uid->GetBuffer() );
+            msg_Dbg( &sys.demuxer, "|   |   + family=%d", *(uint32*)uid->GetBuffer() );
         }
 #if defined( HAVE_GMTIME_R ) && !defined( SYS_DARWIN )
         else if( MKV_IS_ID( l, KaxDateUTC ) )
@@ -2771,35 +2965,34 @@ static void ParseInfo( demux_t *p_demux, EbmlElement *info )
                 asctime_r( &tmres, buffer ) )
             {
                 buffer[strlen( buffer)-1]= '\0';
-                p_sys->psz_date_utc = strdup( buffer );
-                msg_Dbg( p_demux, "|   |   + Date=%s", p_sys->psz_date_utc );
+                psz_date_utc = strdup( buffer );
+                msg_Dbg( &sys.demuxer, "|   |   + Date=%s", psz_date_utc );
             }
         }
 #endif
         else
         {
-            msg_Dbg( p_demux, "|   |   + Unknown (%s)", typeid(*l).name() );
+            msg_Dbg( &sys.demuxer, "|   |   + Unknown (%s)", typeid(*l).name() );
         }
     }
 
-    p_sys->f_duration *= p_sys->i_timescale / 1000000.0;
+    f_duration *= i_timescale / 1000000.0;
 }
 
 
 /*****************************************************************************
  * ParseChapterAtom
  *****************************************************************************/
-static void ParseChapterAtom( demux_t *p_demux, int i_level, EbmlMaster *ca, chapter_item_t & chapters )
+void matroska_segment_t::ParseChapterAtom( int i_level, EbmlMaster *ca, chapter_item_t & chapters )
 {
-    demux_sys_t *p_sys = p_demux->p_sys;
     unsigned int i;
 
-    if( p_sys->title == NULL )
+    if( sys.title == NULL )
     {
-        p_sys->title = vlc_input_title_New();
+        sys.title = vlc_input_title_New();
     }
 
-    msg_Dbg( p_demux, "|   |   |   + ChapterAtom (level=%d)", i_level );
+    msg_Dbg( &sys.demuxer, "|   |   |   + ChapterAtom (level=%d)", i_level );
     for( i = 0; i < ca->ListSize(); i++ )
     {
         EbmlElement *l = (*ca)[i];
@@ -2807,35 +3000,35 @@ static void ParseChapterAtom( demux_t *p_demux, int i_level, EbmlMaster *ca, cha
         if( MKV_IS_ID( l, KaxChapterUID ) )
         {
             chapters.i_uid = uint64_t(*(KaxChapterUID*)l);
-            msg_Dbg( p_demux, "|   |   |   |   + ChapterUID: %lld", chapters.i_uid );
+            msg_Dbg( &sys.demuxer, "|   |   |   |   + ChapterUID: %lld", chapters.i_uid );
         }
         else if( MKV_IS_ID( l, KaxChapterFlagHidden ) )
         {
             KaxChapterFlagHidden &flag =*(KaxChapterFlagHidden*)l;
             chapters.b_display_seekpoint = uint8( flag ) == 0;
 
-            msg_Dbg( p_demux, "|   |   |   |   + ChapterFlagHidden: %s", chapters.b_display_seekpoint ? "no":"yes" );
+            msg_Dbg( &sys.demuxer, "|   |   |   |   + ChapterFlagHidden: %s", chapters.b_display_seekpoint ? "no":"yes" );
         }
         else if( MKV_IS_ID( l, KaxChapterTimeStart ) )
         {
             KaxChapterTimeStart &start =*(KaxChapterTimeStart*)l;
             chapters.i_start_time = uint64( start ) / I64C(1000);
 
-            msg_Dbg( p_demux, "|   |   |   |   + ChapterTimeStart: %lld", chapters.i_start_time );
+            msg_Dbg( &sys.demuxer, "|   |   |   |   + ChapterTimeStart: %lld", chapters.i_start_time );
         }
         else if( MKV_IS_ID( l, KaxChapterTimeEnd ) )
         {
             KaxChapterTimeEnd &end =*(KaxChapterTimeEnd*)l;
             chapters.i_end_time = uint64( end ) / I64C(1000);
 
-            msg_Dbg( p_demux, "|   |   |   |   + ChapterTimeEnd: %lld", chapters.i_end_time );
+            msg_Dbg( &sys.demuxer, "|   |   |   |   + ChapterTimeEnd: %lld", chapters.i_end_time );
         }
         else if( MKV_IS_ID( l, KaxChapterDisplay ) )
         {
             EbmlMaster *cd = static_cast<EbmlMaster *>(l);
             unsigned int j;
 
-            msg_Dbg( p_demux, "|   |   |   |   + ChapterDisplay" );
+            msg_Dbg( &sys.demuxer, "|   |   |   |   + ChapterDisplay" );
             for( j = 0; j < cd->ListSize(); j++ )
             {
                 EbmlElement *l= (*cd)[j];
@@ -2850,28 +3043,28 @@ static void ParseChapterAtom( demux_t *p_demux, int i_level, EbmlMaster *ca, cha
                     chapters.psz_name += ' ';
                     chapters.psz_name += UTF8ToStr( UTFstring( name ) );
 
-                    msg_Dbg( p_demux, "|   |   |   |   |    + ChapterString '%s'", UTF8ToStr(UTFstring(name)) );
+                    msg_Dbg( &sys.demuxer, "|   |   |   |   |    + ChapterString '%s'", UTF8ToStr(UTFstring(name)) );
                 }
                 else if( MKV_IS_ID( l, KaxChapterLanguage ) )
                 {
                     KaxChapterLanguage &lang =*(KaxChapterLanguage*)l;
                     const char *psz = string( lang ).c_str();
 
-                    msg_Dbg( p_demux, "|   |   |   |   |    + ChapterLanguage '%s'", psz );
+                    msg_Dbg( &sys.demuxer, "|   |   |   |   |    + ChapterLanguage '%s'", psz );
                 }
                 else if( MKV_IS_ID( l, KaxChapterCountry ) )
                 {
                     KaxChapterCountry &ct =*(KaxChapterCountry*)l;
                     const char *psz = string( ct ).c_str();
 
-                    msg_Dbg( p_demux, "|   |   |   |   |    + ChapterCountry '%s'", psz );
+                    msg_Dbg( &sys.demuxer, "|   |   |   |   |    + ChapterCountry '%s'", psz );
                 }
             }
         }
         else if( MKV_IS_ID( l, KaxChapterAtom ) )
         {
             chapter_item_t new_sub_chapter;
-            ParseChapterAtom( p_demux, i_level+1, static_cast<EbmlMaster *>(l), new_sub_chapter );
+            ParseChapterAtom( i_level+1, static_cast<EbmlMaster *>(l), new_sub_chapter );
             new_sub_chapter.psz_parent = &chapters;
             chapters.sub_chapters.push_back( new_sub_chapter );
         }
@@ -2881,19 +3074,18 @@ static void ParseChapterAtom( demux_t *p_demux, int i_level, EbmlMaster *ca, cha
 /*****************************************************************************
  * ParseChapters:
  *****************************************************************************/
-static void ParseChapters( demux_t *p_demux, EbmlElement *chapters )
+void matroska_segment_t::ParseChapters( EbmlElement *chapters )
 {
-    demux_sys_t *p_sys = p_demux->p_sys;
     EbmlElement *el;
     EbmlMaster  *m;
     unsigned int i;
     int i_upper_level = 0;
     int i_default_edition = 0;
-    float f_duration;
+    float f_dur;
 
     /* Master elements */
     m = static_cast<EbmlMaster *>(chapters);
-    m->Read( *p_sys->es, chapters->Generic().Context, i_upper_level, el, true );
+    m->Read( es, chapters->Generic().Context, i_upper_level, el, true );
 
     for( i = 0; i < m->ListSize(); i++ )
     {
@@ -2905,7 +3097,7 @@ static void ParseChapters( demux_t *p_demux, EbmlElement *chapters )
             
             EbmlMaster *E = static_cast<EbmlMaster *>(l );
             unsigned int j;
-            msg_Dbg( p_demux, "|   |   + EditionEntry" );
+            msg_Dbg( &sys.demuxer, "|   |   + EditionEntry" );
             for( j = 0; j < E->ListSize(); j++ )
             {
                 EbmlElement *l = (*E)[j];
@@ -2913,7 +3105,7 @@ static void ParseChapters( demux_t *p_demux, EbmlElement *chapters )
                 if( MKV_IS_ID( l, KaxChapterAtom ) )
                 {
                     chapter_item_t new_sub_chapter;
-                    ParseChapterAtom( p_demux, 0, static_cast<EbmlMaster *>(l), new_sub_chapter );
+                    ParseChapterAtom( 0, static_cast<EbmlMaster *>(l), new_sub_chapter );
                     edition.chapters.push_back( new_sub_chapter );
                 }
                 else if( MKV_IS_ID( l, KaxEditionUID ) )
@@ -2922,112 +3114,111 @@ static void ParseChapters( demux_t *p_demux, EbmlElement *chapters )
                 }
                 else if( MKV_IS_ID( l, KaxEditionFlagOrdered ) )
                 {
-                    edition.b_ordered = uint8(*static_cast<KaxEditionFlagOrdered *>( l )) != 0;
+                    edition.b_ordered = config_GetInt( &sys.demuxer, "mkv-use-ordered-chapters" ) ? (uint8(*static_cast<KaxEditionFlagOrdered *>( l )) != 0) : 0;
                 }
                 else if( MKV_IS_ID( l, KaxEditionFlagDefault ) )
                 {
                     if (uint8(*static_cast<KaxEditionFlagDefault *>( l )) != 0)
-                        i_default_edition = p_sys->editions.size();
+                        i_default_edition = editions.size();
                 }
                 else
                 {
-                    msg_Dbg( p_demux, "|   |   |   + Unknown (%s)", typeid(*l).name() );
+                    msg_Dbg( &sys.demuxer, "|   |   |   + Unknown (%s)", typeid(*l).name() );
                 }
             }
-            p_sys->editions.push_back( edition );
+            editions.push_back( edition );
         }
         else
         {
-            msg_Dbg( p_demux, "|   |   + Unknown (%s)", typeid(*l).name() );
+            msg_Dbg( &sys.demuxer, "|   |   + Unknown (%s)", typeid(*l).name() );
         }
     }
 
-    for( i = 0; i < p_sys->editions.size(); i++ )
+    for( i = 0; i < editions.size(); i++ )
     {
-        p_sys->editions[i].RefreshChapters( *p_sys->title );
+        editions[i].RefreshChapters( *sys.title );
     }
     
-    p_sys->i_current_edition = i_default_edition;
+    i_current_edition = i_default_edition;
     
-    if ( p_sys->editions[i_default_edition].b_ordered )
+    if ( editions[i_default_edition].b_ordered )
     {
         /* update the duration of the segment according to the sum of all sub chapters */
-        f_duration = p_sys->editions[i_default_edition].Duration() / I64C(1000);
-        if (f_duration > 0.0)
-            p_sys->f_duration = f_duration;
+        f_dur = editions[i_default_edition].Duration() / I64C(1000);
+        if (f_dur > 0.0)
+            f_duration = f_dur;
     }
 }
 
 /*****************************************************************************
  * InformationCreate:
  *****************************************************************************/
-static void InformationCreate( demux_t *p_demux )
+void matroska_segment_t::InformationCreate( )
 {
-    demux_sys_t *p_sys = p_demux->p_sys;
-    int         i_track;
+    size_t      i_track;
 
-    p_sys->meta = vlc_meta_New();
+    sys.meta = vlc_meta_New();
 
-    if( p_sys->psz_title )
+    if( psz_title )
     {
-        vlc_meta_Add( p_sys->meta, VLC_META_TITLE, p_sys->psz_title );
+        vlc_meta_Add( sys.meta, VLC_META_TITLE, psz_title );
     }
-    if( p_sys->psz_date_utc )
+    if( psz_date_utc )
     {
-        vlc_meta_Add( p_sys->meta, VLC_META_DATE, p_sys->psz_date_utc );
+        vlc_meta_Add( sys.meta, VLC_META_DATE, psz_date_utc );
     }
-    if( p_sys->psz_segment_filename )
+    if( psz_segment_filename )
     {
-        vlc_meta_Add( p_sys->meta, _("Segment filename"), p_sys->psz_segment_filename );
+        vlc_meta_Add( sys.meta, _("Segment filename"), psz_segment_filename );
     }
-    if( p_sys->psz_muxing_application )
+    if( psz_muxing_application )
     {
-        vlc_meta_Add( p_sys->meta, _("Muxing application"), p_sys->psz_muxing_application );
+        vlc_meta_Add( sys.meta, _("Muxing application"), psz_muxing_application );
     }
-    if( p_sys->psz_writing_application )
+    if( psz_writing_application )
     {
-        vlc_meta_Add( p_sys->meta, _("Writing application"), p_sys->psz_writing_application );
+        vlc_meta_Add( sys.meta, _("Writing application"), psz_writing_application );
     }
 
-    for( i_track = 0; i_track < p_sys->i_track; i_track++ )
+    for( i_track = 0; i_track < tracks.size(); i_track++ )
     {
-        mkv_track_t *tk = &p_sys->track[i_track];
+        mkv_track_t *tk = tracks[i_track];
         vlc_meta_t *mtk = vlc_meta_New();
 
-        p_sys->meta->track = (vlc_meta_t**)realloc( p_sys->meta->track,
-                                                    sizeof( vlc_meta_t * ) * ( p_sys->meta->i_track + 1 ) );
-        p_sys->meta->track[p_sys->meta->i_track++] = mtk;
+        sys.meta->track = (vlc_meta_t**)realloc( sys.meta->track,
+                                                    sizeof( vlc_meta_t * ) * ( sys.meta->i_track + 1 ) );
+        sys.meta->track[sys.meta->i_track++] = mtk;
 
         if( tk->fmt.psz_description )
         {
-            vlc_meta_Add( p_sys->meta, VLC_META_DESCRIPTION, tk->fmt.psz_description );
+            vlc_meta_Add( sys.meta, VLC_META_DESCRIPTION, tk->fmt.psz_description );
         }
         if( tk->psz_codec_name )
         {
-            vlc_meta_Add( p_sys->meta, VLC_META_CODEC_NAME, tk->psz_codec_name );
+            vlc_meta_Add( sys.meta, VLC_META_CODEC_NAME, tk->psz_codec_name );
         }
         if( tk->psz_codec_settings )
         {
-            vlc_meta_Add( p_sys->meta, VLC_META_SETTING, tk->psz_codec_settings );
+            vlc_meta_Add( sys.meta, VLC_META_SETTING, tk->psz_codec_settings );
         }
         if( tk->psz_codec_info_url )
         {
-            vlc_meta_Add( p_sys->meta, VLC_META_CODEC_DESCRIPTION, tk->psz_codec_info_url );
+            vlc_meta_Add( sys.meta, VLC_META_CODEC_DESCRIPTION, tk->psz_codec_info_url );
         }
         if( tk->psz_codec_download_url )
         {
-            vlc_meta_Add( p_sys->meta, VLC_META_URL, tk->psz_codec_download_url );
+            vlc_meta_Add( sys.meta, VLC_META_URL, tk->psz_codec_download_url );
         }
     }
 
-    if( p_sys->i_tags_position >= 0 )
+    if( i_tags_position >= 0 )
     {
         vlc_bool_t b_seekable;
 
-        stream_Control( p_demux->s, STREAM_CAN_FASTSEEK, &b_seekable );
+        stream_Control( sys.demuxer.s, STREAM_CAN_FASTSEEK, &b_seekable );
         if( b_seekable )
         {
-            LoadTags( p_demux );
+            LoadTags( );
         }
     }
 }
@@ -3037,22 +3228,20 @@ static void InformationCreate( demux_t *p_demux )
  * Divers
  *****************************************************************************/
 
-static void IndexAppendCluster( demux_t *p_demux, KaxCluster *cluster )
+void matroska_segment_t::IndexAppendCluster( KaxCluster *cluster )
 {
-    demux_sys_t *p_sys = p_demux->p_sys;
-
-#define idx p_sys->index[p_sys->i_index]
+#define idx index[i_index]
     idx.i_track       = -1;
     idx.i_block_number= -1;
     idx.i_position    = cluster->GetElementPosition();
     idx.i_time        = -1;
     idx.b_key         = VLC_TRUE;
 
-    p_sys->i_index++;
-    if( p_sys->i_index >= p_sys->i_index_max )
+    i_index++;
+    if( i_index >= i_index_max )
     {
-        p_sys->i_index_max += 1024;
-        p_sys->index = (mkv_index_t*)realloc( p_sys->index, sizeof( mkv_index_t ) * p_sys->i_index_max );
+        i_index_max += 1024;
+        index = (mkv_index_t*)realloc( index, sizeof( mkv_index_t ) * i_index_max );
     }
 #undef idx
 }
@@ -3194,3 +3383,242 @@ const chapter_item_t *chapter_edition_t::FindTimecode( mtime_t i_user_timecode )
 
     return psz_result;
 }
+
+void demux_sys_t::PreloadFamily( )
+{
+/* family handling disabled  for the moment
+    matroska_stream_t *p_stream = Stream();
+    if ( p_stream )
+    {
+        matroska_segment_t *p_segment = p_stream->Segment();
+        if ( p_segment )
+        {
+            for (size_t i=0; i<streams.size(); i++)
+            {
+                streams[i]->PreloadFamily( *p_segment );
+            }
+        }
+    }
+*/
+}
+
+void matroska_stream_t::PreloadFamily( const matroska_segment_t & of_segment )
+{
+    for (size_t i=0; i<segments.size(); i++)
+    {
+        segments[i]->PreloadFamily( of_segment );
+    }
+}
+
+bool matroska_segment_t::PreloadFamily( const matroska_segment_t & of_segment )
+{
+    if ( b_preloaded )
+        return false;
+
+    for (size_t i=0; i<families.size(); i++)
+    {
+        for (size_t j=0; j<of_segment.families.size(); j++)
+        {
+            if ( families[i] == of_segment.families[j] )
+                return Preload( );
+        }
+    }
+
+    return false;
+}
+
+// preload all the linked segments for all preloaded segments
+void demux_sys_t::PreloadLinked( matroska_segment_t *p_segment )
+{
+    size_t i_preloaded, i;
+
+    delete p_current_segment;
+    p_current_segment = new virtual_segment_t( p_segment );
+
+    // fill our current virtual segment with all hard linked segments
+    do {
+        i_preloaded = 0;
+        for ( i=0; i< opened_segments.size(); i++ )
+        {
+            i_preloaded += p_current_segment->AddSegment( opened_segments[i] );
+        }
+    } while ( i_preloaded ); // worst case: will stop when all segments are found as linked
+
+    p_current_segment->Sort( );
+
+    p_current_segment->PreloadLinked( );
+}
+
+void demux_sys_t::PreparePlayback( )
+{
+    f_duration = p_current_segment->Duration();
+    p_current_segment->LoadCues();
+}
+
+bool matroska_segment_t::CompareSegmentUIDs( const matroska_segment_t * p_item_a, const matroska_segment_t * p_item_b )
+{
+    EbmlBinary * p_itema = (EbmlBinary *)(&p_item_a->segment_uid);
+    if ( *p_itema == p_item_b->prev_segment_uid )
+        return true;
+
+    p_itema = (EbmlBinary *)(&p_item_a->next_segment_uid);
+    if ( *p_itema == p_item_b->segment_uid )
+        return true;
+
+    if ( *p_itema == p_item_b->prev_segment_uid )
+        return true;
+
+    return false;
+}
+
+bool matroska_segment_t::Preload( )
+{
+    if ( b_preloaded )
+        return false;
+
+    EbmlElement *el = NULL;
+
+    ep->Reset();
+
+    while( ( el = ep->Get() ) != NULL )
+    {
+        if( MKV_IS_ID( el, KaxInfo ) )
+        {
+            ParseInfo( el );
+        }
+        else if( MKV_IS_ID( el, KaxTracks ) )
+        {
+            ParseTracks( el );
+        }
+        else if( MKV_IS_ID( el, KaxSeekHead ) )
+        {
+            ParseSeekHead( el );
+        }
+        else if( MKV_IS_ID( el, KaxCues ) )
+        {
+            msg_Dbg( &sys.demuxer, "|   + Cues" );
+        }
+        else if( MKV_IS_ID( el, KaxCluster ) )
+        {
+            msg_Dbg( &sys.demuxer, "|   + Cluster" );
+
+            cluster = (KaxCluster*)el;
+
+            i_start_pos = cluster->GetElementPosition();
+
+            ep->Down();
+            /* stop parsing the stream */
+            break;
+        }
+        else if( MKV_IS_ID( el, KaxAttachments ) )
+        {
+            msg_Dbg( &sys.demuxer, "|   + Attachments FIXME TODO (but probably never supported)" );
+        }
+        else if( MKV_IS_ID( el, KaxChapters ) )
+        {
+            msg_Dbg( &sys.demuxer, "|   + Chapters" );
+            ParseChapters( el );
+        }
+        else if( MKV_IS_ID( el, KaxTag ) )
+        {
+            msg_Dbg( &sys.demuxer, "|   + Tags FIXME TODO" );
+        }
+        else
+        {
+            msg_Dbg( &sys.demuxer, "|   + Unknown (%s)", typeid(*el).name() );
+        }
+    }
+
+    b_preloaded = true;
+
+    return true;
+}
+
+matroska_segment_t *demux_sys_t::FindSegment( const EbmlBinary & uid ) const
+{
+    for (size_t i=0; i<opened_segments.size(); i++)
+    {
+        if ( opened_segments[i]->segment_uid == uid )
+            return opened_segments[i];
+    }
+    return NULL;
+}
+
+void virtual_segment_t::Sort()
+{
+    // keep the current segment index
+    matroska_segment_t *p_segment = linked_segments[i_current_segment];
+
+    std::sort( linked_segments.begin(), linked_segments.end(), matroska_segment_t::CompareSegmentUIDs );
+
+    for ( i_current_segment=0; i_current_segment<linked_segments.size(); i_current_segment++)
+        if ( linked_segments[i_current_segment] == p_segment )
+            break;
+}
+
+size_t virtual_segment_t::AddSegment( matroska_segment_t *p_segment )
+{
+    size_t i;
+    // check if it's not already in here
+    for ( i=0; i<linked_segments.size(); i++ )
+    {
+        if ( p_segment->segment_uid == linked_segments[i]->segment_uid )
+            return 0;
+    }
+
+    // find possible mates
+    for ( i=0; i<linked_uids.size(); i++ )
+    {
+        if (   p_segment->segment_uid == linked_uids[i] 
+            || p_segment->prev_segment_uid == linked_uids[i] 
+            || p_segment->next_segment_uid == linked_uids[i] )
+        {
+            linked_segments.push_back( p_segment );
+
+            AppendUID( p_segment->prev_segment_uid );
+            AppendUID( p_segment->next_segment_uid );
+
+            return 1;
+        }
+    }
+    return 0;
+}
+
+void virtual_segment_t::PreloadLinked( )
+{
+    for ( size_t i=0; i<linked_segments.size(); i++ )
+    {
+        linked_segments[i]->Preload( );
+    }
+}
+
+float virtual_segment_t::Duration() const
+{
+    float f_duration = 0.0;
+    for ( size_t i=0; i<linked_segments.size(); i++ )
+    {
+        f_duration += linked_segments[i]->f_duration;
+    }
+    return f_duration;
+}
+
+void virtual_segment_t::LoadCues( )
+{
+    for ( size_t i=0; i<linked_segments.size(); i++ )
+    {
+        linked_segments[i]->LoadCues();
+    }
+}
+
+void virtual_segment_t::AppendUID( const EbmlBinary & UID )
+{
+    if ( UID.GetBuffer() == NULL )
+        return;
+
+    for (size_t i=0; i<linked_uids.size(); i++)
+    {
+        if ( UID == linked_uids[i] )
+            return;
+    }
+    linked_uids.push_back( *(KaxSegmentUID*)(&UID) );
+}