dvdread.c: fix the title duration & time reports

modules/access/dvdread.c

@@ -300,6 +300,44 @@ static void Close( vlc_object_t *p_this )
     free( p_sys );
 }
 
+static int64_t dvdtime_to_time( dvd_time_t *dtime, uint8_t still_time )
+{
+/* Macro to convert Binary Coded Decimal to Decimal */
+#define BCD2D(__x__) (((__x__ & 0xf0) >> 4) * 10 + (__x__ & 0x0f))
+
+    double f_fps, f_ms;
+    int64_t i_micro_second = 0;
+
+    if (still_time == 0 || still_time == 0xFF)
+    {
+        i_micro_second += (int64_t)(BCD2D(dtime->hour)) * 60 * 60 * 1000000;
+        i_micro_second += (int64_t)(BCD2D(dtime->minute)) * 60 * 1000000;
+        i_micro_second += (int64_t)(BCD2D(dtime->second)) * 1000000;
+
+        switch((dtime->frame_u & 0xc0) >> 6) 
+        {
+        case 1:
+            f_fps = 25.0;
+            break;
+        case 3:
+            f_fps = 29.97;
+            break;
+        default:
+            f_fps = 2500.0;
+            break;
+        }
+        f_ms = BCD2D(dtime->frame_u&0x3f) * 1000.0 / f_fps;
+        i_micro_second += (int64_t)(f_ms * 1000.0);
+    }
+    else
+    {
+        i_micro_second = still_time;
+        i_micro_second = (int64_t)((double)i_micro_second * 1000000.0);
+    }
+    
+    return i_micro_second;
+}
+
 /*****************************************************************************
  * Control:
  *****************************************************************************/
@@ -347,10 +385,10 @@ static int Control( demux_t *p_demux, int i_query, va_list args )
 
         case DEMUX_GET_LENGTH:
             pi64 = (int64_t*)va_arg( args, int64_t * );
-            if( p_sys->i_mux_rate > 0 )
+            if (p_demux->info.i_title >= 0 && p_demux->info.i_title < p_sys->i_titles)
             {
-                *pi64 = (int64_t)1000000 * DVD_VIDEO_LB_LEN *
-                        p_sys->i_title_blocks / 50 / p_sys->i_mux_rate;
+                *pi64 = dvdtime_to_time( &p_sys->p_cur_pgc->playback_time, 0 );
+                p_sys->i_mux_rate = p_sys->i_title_blocks * DVD_VIDEO_LB_LEN / (*pi64 / 20000);
                 return VLC_SUCCESS;
             }
             *pi64 = 0;
@@ -571,7 +609,7 @@ static int DemuxBlock( demux_t *p_demux, uint8_t *pkt, int i_pkt )
             if( !ps_pkt_parse_pack( p_pkt, &i_scr, &i_mux_rate ) )
             {
                 es_out_Control( p_demux->out, ES_OUT_SET_PCR, i_scr );
-                if( i_mux_rate > 0 ) p_sys->i_mux_rate = i_mux_rate;
+/*                if( i_mux_rate > 0 ) p_sys->i_mux_rate = i_mux_rate;*/
             }
             block_Release( p_pkt );
             break;