* Support for Topfield .rec recordings. It's MPEG-TS with an exceptionally...

* Support for Topfield .rec recordings. It's MPEG-TS with an exceptionally large (1MB) header in front of it.
  I tried adding the info in the header to meta, but the existing documention seems incorrect or at least incomplete. Instead we just accept the start of the header as identifying a MPEG-TS file, and skipping the header.

  BTW this header is again an example of very bad format design. It is using fixed length strings, for which the used buffers clearly are not null'ed before written with new information. As such i was able to determine which programs were running before this program was recorded :D
  Also a PID printed to a field was clearly not printed to null'ed memory, causing an invalid (too high) PID number to be in the field. You'd think the least someone could do when designing something like this, would be to analyze a hexdump of your own custom header.

modules/demux/ts.c

@@ -365,6 +365,7 @@ static void              IODFree( iod_descriptor_t * );
 #define TS_PACKET_SIZE_192 192
 #define TS_PACKET_SIZE_204 204
 #define TS_PACKET_SIZE_MAX 204
+#define TS_TOPFIELD_HEADER 1320
 
 /*****************************************************************************
  * Open
@@ -381,25 +382,42 @@ static int Open( vlc_object_t *p_this )
     ts_pid_t    *pat;
     char        *psz_mode;
     vlc_bool_t   b_append;
+    vlc_bool_t   b_topfield = VLC_FALSE;
 
     vlc_value_t  val;
 
     if( stream_Peek( p_demux->s, &p_peek, TS_PACKET_SIZE_MAX ) <
         TS_PACKET_SIZE_MAX ) return VLC_EGENERIC;
 
+    if( p_peek[0] == 'T' && p_peek[1] == 'F' &&
+        p_peek[2] == 'r' && p_peek[3] == 'c' )
+    {
+        b_topfield = VLC_TRUE;
+        msg_Dbg( p_demux, "this is a topfield file" );
+    }
+
     /* Search first sync byte */
     for( i_sync = 0; i_sync < TS_PACKET_SIZE_MAX; i_sync++ )
     {
         if( p_peek[i_sync] == 0x47 ) break;
     }
-    if( i_sync >= TS_PACKET_SIZE_MAX )
+    if( i_sync >= TS_PACKET_SIZE_MAX && !b_topfield )
     {
         if( strcmp( p_demux->psz_demux, "ts" ) ) return VLC_EGENERIC;
         msg_Warn( p_demux, "this does not look like a TS stream, continuing" );
     }
 
+    if( b_topfield )
+    {
+        /* Read the entire Topfield header */
+        i_peek = TS_TOPFIELD_HEADER;
+    }
+    else
+    {
         /* Check next 3 sync bytes */
         i_peek = TS_PACKET_SIZE_MAX * 3 + i_sync + 1;
+    }
+    
     if( ( stream_Peek( p_demux->s, &p_peek, i_peek ) ) < i_peek )
     {
         msg_Err( p_demux, "cannot peek" );
@@ -427,6 +445,73 @@ static int Open( vlc_object_t *p_this )
     {
         i_packet_size = TS_PACKET_SIZE_188;
     }
+    else if( b_topfield )
+    {
+        i_packet_size = TS_PACKET_SIZE_188;
+#if 0
+        /* I used the TF5000PVR 2004 Firmware .doc header documentation, 
+         * http://www.i-topfield.com/data/product/firmware/Structure%20of%20Recorded%20File%20in%20TF5000PVR%20(Feb%2021%202004).doc
+         * but after the filename the offsets seem to be incorrect.  - DJ */
+        int i_duration, i_name;
+        char *psz_name = malloc(25);
+        char *psz_event_name;
+        char *psz_event_text = malloc(130);
+        char *psz_ext_text = malloc(1025);
+
+        // 2 bytes version Uimsbf (4,5)
+        // 2 bytes reserved (6,7)
+        // 2 bytes duration in minutes Uimsbf (8,9(
+        i_duration = (int) (p_peek[8] << 8) | p_peek[9];
+        msg_Dbg( p_demux, "Topfield recording length: +/- %d minutes", i_duration);
+        // 2 bytes service number in channel list (10, 11)
+        // 2 bytes service type Bslbf 0=TV 1=Radio Bslb (12, 13)
+        // 4 bytes of reserved + tuner info (14,15,16,17)
+        // 2 bytes of Service ID  Bslbf (18,19)
+        // 2 bytes of PMT PID  Uimsbf (20,21)
+        // 2 bytes of PCR PID  Uimsbf (22,23)
+        // 2 bytes of Video PID  Uimsbf (24,25)
+        // 2 bytes of Audio PID  Uimsbf (26,27)
+        // 24 bytes filename Bslbf
+        memcpy( psz_name, &p_peek[28], 24 );
+        psz_name[24] = '\0';
+        msg_Dbg( p_demux, "recordingname=%s", psz_name );
+        // 1 byte of sat index Uimsbf  (52)
+        // 3 bytes (1 bit of polarity Bslbf +23 bits reserved)
+        // 4 bytes of freq. Uimsbf (56,57,58,59)
+        // 2 bytes of symbol rate Uimsbf (60,61)
+        // 2 bytes of TS stream ID Uimsbf (62,63)
+        // 4 bytes reserved 
+        // 2 bytes reserved
+        // 2 bytes duration Uimsbf (70,71)
+        //i_duration = (int) (p_peek[70] << 8) | p_peek[71];
+        //msg_Dbg( p_demux, "Topfield 2nd duration field: +/- %d minutes", i_duration);
+        // 4 bytes EventID Uimsbf (72-75)
+        // 8 bytes of Start and End time info (76-83)
+        // 1 byte reserved (84)
+        // 1 byte event name length Uimsbf (89)
+        i_name = (int)(p_peek[89]&~0x81);
+        msg_Dbg( p_demux, "event name length = %d", i_name);
+        psz_event_name = malloc( i_name+1 );
+        // 1 byte parental rating (90)
+        // 129 bytes of event text
+        memcpy( psz_event_name, &p_peek[91], i_name );
+        psz_event_name[i_name] = '\0';
+        memcpy( psz_event_text, &p_peek[91+i_name], 129-i_name );
+        psz_event_text[129-i_name] = '\0';
+        msg_Dbg( p_demux, "event name=%s", psz_event_name );
+        msg_Dbg( p_demux, "event text=%s", psz_event_text );
+        // 12 bytes reserved (220)
+        // 6 bytes reserved
+        // 2 bytes Event Text Length Uimsbf
+        // 4 bytes EventID Uimsbf
+        // FIXME We just have 613 bytes. not enough for this entire text
+        // 1024 bytes Extended Event Text Bslbf
+        memcpy( psz_ext_text, p_peek+372, 1024 );
+        psz_ext_text[1024] = '\0';
+        msg_Dbg( p_demux, "extended event text=%s", psz_ext_text );
+        // 52 bytes reserved Bslbf
+#endif
+    }
     else
     {
         msg_Warn( p_demux, "TS module discarded (lost sync)" );