Added old abandoned version of k9copy

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/k9copy@1091546 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 1861 insertions, 0 deletions

diff --git a/libdvdnav/vm.c b/libdvdnav/vm.c
new file mode 100644
index 0000000..dbebafa
--- /dev/null
+++ b/libdvdnav/vm.c
@@ -0,0 +1,1861 @@
+/*
+ * Copyright (C) 2000, 2001 H�an Hjort
+ * Copyright (C) 2001 Rich Wareham <richwareham@users.sourceforge.net>
+ *               2002-2004 the dvdnav project
+ * 
+ * This file is part of libdvdnav, a DVD navigation library. It is modified
+ * from a file originally part of the Ogle DVD player.
+ * 
+ * libdvdnav is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * libdvdnav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ *
+ * $Id: vm.c,v 1.32 2004/12/20 19:27:20 mroi Exp $
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <assert.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include "dvdread.h"
+
+#include "dvdnav_internal.h"
+
+#ifdef _MSC_VER
+#include <io.h>   /* read() */
+#endif /* _MSC_VER */
+
+/*
+#define STRICT
+*/
+
+/* Local prototypes */
+
+/* get_XYZ returns a value.
+ * set_XYZ sets state using passed parameters.
+ *         returns success/failure.
+ */
+
+/* Play */
+static link_t play_PGC(vm_t *vm);
+static link_t play_PGC_PG(vm_t *vm, int pgN);
+static link_t play_PGC_post(vm_t *vm);
+static link_t play_PG(vm_t *vm);
+static link_t play_Cell(vm_t *vm);
+static link_t play_Cell_post(vm_t *vm);
+
+/* Process link - returns 1 if a hop has been performed */
+static int process_command(vm_t *vm,link_t link_values);
+
+/* Set */
+static int  set_TT(vm_t *vm, int tt);
+static int  set_PTT(vm_t *vm, int tt, int ptt);
+static int  set_VTS_TT(vm_t *vm, int vtsN, int vts_ttn);
+static int  set_VTS_PTT(vm_t *vm, int vtsN, int vts_ttn, int part);
+static int  set_FP_PGC(vm_t *vm);
+static int  set_MENU(vm_t *vm, int menu);
+static int  set_PGCN(vm_t *vm, int pgcN);
+static int  set_PGN(vm_t *vm); /* Set PGN based on (vm->state).CellN */
+static void set_RSMinfo(vm_t *vm, int cellN, int blockN);
+
+/* Get */
+static int get_TT(vm_t *vm, int vtsN, int vts_ttn);
+static int get_ID(vm_t *vm, int id);
+static int get_PGCN(vm_t *vm);
+
+static pgcit_t* get_MENU_PGCIT(vm_t *vm, ifo_handle_t *h, uint16_t lang);
+static pgcit_t* get_PGCIT(vm_t *vm);
+
+
+/* Helper functions */
+
+#ifdef TRACE
+static void vm_print_current_domain_state(vm_t *vm) {
+  switch((vm->state).domain) {
+    case VTS_DOMAIN:
+      fprintf(MSG_OUT, "libdvdnav: Video Title Domain: -\n");
+      break;
+
+    case VTSM_DOMAIN:
+      fprintf(MSG_OUT, "libdvdnav: Video Title Menu Domain: -\n");
+      break;
+
+    case VMGM_DOMAIN:
+      fprintf(MSG_OUT, "libdvdnav: Video Manager Menu Domain: -\n");
+      break;
+
+    case FP_DOMAIN: 
+      fprintf(MSG_OUT, "libdvdnav: First Play Domain: -\n");
+      break;
+
+    default:
+      fprintf(MSG_OUT, "libdvdnav: Unknown Domain: -\n");
+      break;
+  }
+  fprintf(MSG_OUT, "libdvdnav: VTS:%d PGC:%d PG:%u CELL:%u BLOCK:%u VTS_TTN:%u TTN:%u TT_PGCN:%u\n", 
+                   (vm->state).vtsN,
+                   get_PGCN(vm),
+                   (vm->state).pgN,
+                   (vm->state).cellN,
+                   (vm->state).blockN,
+                   (vm->state).VTS_TTN_REG,
+                   (vm->state).TTN_REG,
+                   (vm->state).TT_PGCN_REG);
+}
+#endif
+
+static void dvd_read_name(char *name, const char *device) {
+    /* Because we are compiling with _FILE_OFFSET_BITS=64
+     * all off_t are 64bit.
+     */
+    off_t off;
+    int fd, i;
+    uint8_t data[DVD_VIDEO_LB_LEN];
+
+    /* Read DVD name */
+    fd = open(device, O_RDONLY);
+    if (fd > 0) { 
+      off = lseek( fd, 32 * (off_t) DVD_VIDEO_LB_LEN, SEEK_SET );
+      if( off == ( 32 * (off_t) DVD_VIDEO_LB_LEN ) ) {
+        off = read( fd, data, DVD_VIDEO_LB_LEN ); 
+        close(fd);
+        if (off == ( (off_t) DVD_VIDEO_LB_LEN )) {
+          fprintf(MSG_OUT, "libdvdnav: DVD Title: ");
+          for(i=25; i < 73; i++ ) {
+            if((data[i] == 0)) break;
+            if((data[i] > 32) && (data[i] < 127)) {
+              fprintf(MSG_OUT, "%c", data[i]);
+            } else {
+              fprintf(MSG_OUT, " ");
+            }
+          }
+          strncpy(name, &data[25], 48);
+          name[48] = 0;
+          fprintf(MSG_OUT, "\nlibdvdnav: DVD Serial Number: ");
+          for(i=73; i < 89; i++ ) {
+            if((data[i] == 0)) break;
+            if((data[i] > 32) && (data[i] < 127)) {
+              fprintf(MSG_OUT, "%c", data[i]);
+            } else {
+              fprintf(MSG_OUT, " ");
+            } 
+          }
+          fprintf(MSG_OUT, "\nlibdvdnav: DVD Title (Alternative): ");
+          for(i=89; i < 128; i++ ) {
+            if((data[i] == 0)) break;
+            if((data[i] > 32) && (data[i] < 127)) {
+              fprintf(MSG_OUT, "%c", data[i]);
+            } else {
+              fprintf(MSG_OUT, " ");
+            }
+          }
+          fprintf(MSG_OUT, "\n");
+        } else {
+          fprintf(MSG_OUT, "libdvdnav: Can't read name block. Probably not a DVD-ROM device.\n");
+        }
+      } else {
+        fprintf(MSG_OUT, "libdvdnav: Can't seek to block %u\n", 32 );
+      }
+      close(fd);
+    } else {
+    fprintf(MSG_OUT, "NAME OPEN FAILED\n");
+  }
+}
+
+static int ifoOpenNewVTSI(vm_t *vm, dvd_reader_t *dvd, int vtsN) {
+  if((vm->state).vtsN == vtsN) {
+    return 1; /*  We alread have it */
+  }
+  
+  if(vm->vtsi != NULL)
+    ifoClose(vm->vtsi);
+  
+  vm->vtsi = ifoOpenVTSI(dvd, vtsN);
+  if(vm->vtsi == NULL) {
+    fprintf(MSG_OUT, "libdvdnav: ifoOpenVTSI failed\n");
+    return 0;
+  }
+  if(!ifoRead_VTS_PTT_SRPT(vm->vtsi)) {
+    fprintf(MSG_OUT, "libdvdnav: ifoRead_VTS_PTT_SRPT failed\n");
+    return 0;
+  }
+  if(!ifoRead_PGCIT(vm->vtsi)) {
+    fprintf(MSG_OUT, "libdvdnav: ifoRead_PGCIT failed\n");
+    return 0;
+  }
+  if(!ifoRead_PGCI_UT(vm->vtsi)) {
+    fprintf(MSG_OUT, "libdvdnav: ifoRead_PGCI_UT failed\n");
+    return 0;
+  }
+  if(!ifoRead_VOBU_ADMAP(vm->vtsi)) {
+    fprintf(MSG_OUT, "libdvdnav: ifoRead_VOBU_ADMAP vtsi failed\n");
+    return 0;
+  }
+  if(!ifoRead_TITLE_VOBU_ADMAP(vm->vtsi)) {
+    fprintf(MSG_OUT, "libdvdnav: ifoRead_TITLE_VOBU_ADMAP vtsi failed\n");
+    return 0;
+  }
+  (vm->state).vtsN = vtsN;
+  
+  return 1;
+}
+
+
+/* Initialisation & Destruction */
+
+vm_t* vm_new_vm() {
+  return (vm_t*)calloc(sizeof(vm_t), sizeof(char));
+}
+
+void vm_free_vm(vm_t *vm) {
+  vm_stop(vm);
+  free(vm);
+}
+
+
+/* IFO Access */
+
+ifo_handle_t *vm_get_vmgi(vm_t *vm) {
+  return vm->vmgi;
+}
+
+ifo_handle_t *vm_get_vtsi(vm_t *vm) {
+  return vm->vtsi;
+}
+
+
+/* Reader Access */
+
+dvd_reader_t *vm_get_dvd_reader(vm_t *vm) {
+  return vm->dvd;
+}
+
+
+/* Basic Handling */
+
+int vm_start(vm_t *vm) {
+  /* Set pgc to FP (First Play) pgc */
+  set_FP_PGC(vm);
+  process_command(vm, play_PGC(vm));
+  return !vm->stopped;
+}
+
+void vm_stop(vm_t *vm) {
+  if(vm->vmgi) {
+    ifoClose(vm->vmgi);
+    vm->vmgi=NULL;
+  }
+  if(vm->vtsi) {
+    ifoClose(vm->vtsi);
+    vm->vtsi=NULL;
+  }
+  if(vm->dvd) {
+     if (!vm->openedDvd)
+    	DVDClose(vm->dvd);
+    vm->dvd=NULL;
+  }
+  vm->stopped = 1;
+}
+ 
+int vm_reset(vm_t *vm, const char *dvdroot) {
+  /*  Setup State */
+  memset((vm->state).registers.SPRM, 0, sizeof((vm->state).registers.SPRM));
+  memset((vm->state).registers.GPRM, 0, sizeof((vm->state).registers.GPRM));
+  memset((vm->state).registers.GPRM_mode, 0, sizeof((vm->state).registers.GPRM_mode));
+  memset((vm->state).registers.GPRM_mode, 0, sizeof((vm->state).registers.GPRM_mode));
+  memset((vm->state).registers.GPRM_time, 0, sizeof((vm->state).registers.GPRM_time));
+  (vm->state).registers.SPRM[0]  = ('e'<<8)|'n'; /* Player Menu Languange code */
+  (vm->state).AST_REG            = 15;           /* 15 why? */
+  (vm->state).SPST_REG           = 62;           /* 62 why? */
+  (vm->state).AGL_REG            = 1;
+  (vm->state).TTN_REG            = 1;
+  (vm->state).VTS_TTN_REG        = 1;
+  /* (vm->state).TT_PGCN_REG        = 0 */
+  (vm->state).PTTN_REG           = 1;
+  (vm->state).HL_BTNN_REG        = 1 << 10;
+  (vm->state).PTL_REG            = 15;           /* Parental Level */
+  (vm->state).registers.SPRM[12] = ('U'<<8)|'S'; /* Parental Management Country Code */
+  (vm->state).registers.SPRM[16] = ('e'<<8)|'n'; /* Initial Language Code for Audio */
+  (vm->state).registers.SPRM[18] = ('e'<<8)|'n'; /* Initial Language Code for Spu */
+  (vm->state).registers.SPRM[20] = 0x1;          /* Player Regional Code Mask. Region free! */
+  (vm->state).registers.SPRM[14] = 0x100;        /* Try Pan&Scan */
+   
+  (vm->state).pgN                = 0;
+  (vm->state).cellN              = 0;
+  (vm->state).cell_restart       = 0;
+
+  (vm->state).domain             = FP_DOMAIN;
+  (vm->state).rsm_vtsN           = 0;
+  (vm->state).rsm_cellN          = 0;
+  (vm->state).rsm_blockN         = 0;
+  
+  (vm->state).vtsN               = -1;
+  
+  if (vm->dvd && dvdroot) {
+    /* a new dvd device has been requested */
+    vm_stop(vm);
+  }
+
+  if (!vm->dvd) {	
+    if (vm->openedDvd)   /*JMP we use the dvd opened by copy*/
+	vm->dvd=vm->openedDvd;
+    else 
+        vm->dvd = DVDOpen(dvdroot);
+    if(!vm->dvd) {
+      fprintf(MSG_OUT, "libdvdnav: vm: faild to open/read the DVD\n");
+      return 0;
+    }
+    dvd_read_name(vm->dvd_name, dvdroot);
+    vm->map  = remap_loadmap(vm->dvd_name);
+    vm->vmgi = ifoOpenVMGI(vm->dvd);
+    if(!vm->vmgi) {
+      fprintf(MSG_OUT, "libdvdnav: vm: faild to read VIDEO_TS.IFO\n");
+      return 0;
+    }
+    if(!ifoRead_FP_PGC(vm->vmgi)) {
+      fprintf(MSG_OUT, "libdvdnav: vm: ifoRead_FP_PGC failed\n");
+      return 0;
+    }
+    if(!ifoRead_TT_SRPT(vm->vmgi)) {
+      fprintf(MSG_OUT, "libdvdnav: vm: ifoRead_TT_SRPT failed\n");
+      return 0;
+    }
+    if(!ifoRead_PGCI_UT(vm->vmgi)) {
+      fprintf(MSG_OUT, "libdvdnav: vm: ifoRead_PGCI_UT failed\n");
+      return 0;
+    }
+    if(!ifoRead_PTL_MAIT(vm->vmgi)) {
+      fprintf(MSG_OUT, "libdvdnav: vm: ifoRead_PTL_MAIT failed\n");
+      /* return 0; Not really used for now.. */
+    }
+    if(!ifoRead_VTS_ATRT(vm->vmgi)) {
+      fprintf(MSG_OUT, "libdvdnav: vm: ifoRead_VTS_ATRT failed\n");
+      /* return 0; Not really used for now.. */
+    }
+    if(!ifoRead_VOBU_ADMAP(vm->vmgi)) {
+      fprintf(MSG_OUT, "libdvdnav: vm: ifoRead_VOBU_ADMAP vgmi failed\n");
+      /* return 0; Not really used for now.. */
+    }
+    /* ifoRead_TXTDT_MGI(vmgi); Not implemented yet */
+  }
+  if (vm->vmgi) {
+    int i, mask;
+    fprintf(MSG_OUT, "libdvdnav: DVD disk reports itself with Region mask 0x%08x. Regions:",
+      vm->vmgi->vmgi_mat->vmg_category);
+    for (i = 1, mask = 1; i <= 8; i++, mask <<= 1)
+      if (((vm->vmgi->vmgi_mat->vmg_category >> 16) & mask) == 0)
+        fprintf(MSG_OUT, " %d", i);
+    fprintf(MSG_OUT, "\n");
+  }
+  return 1;
+}
+
+
+/* copying and merging */
+
+vm_t *vm_new_copy(vm_t *source) {
+  vm_t *target = vm_new_vm();
+  int vtsN;
+  int pgcN = get_PGCN(source);
+  int pgN  = (source->state).pgN;
+  
+  assert(pgcN);
+  
+  memcpy(target, source, sizeof(vm_t));
+  
+  /* open a new vtsi handle, because the copy might switch to another VTS */
+  target->vtsi = NULL;
+  vtsN = (target->state).vtsN;
+  if (vtsN > 0) {
+    (target->state).vtsN = 0;
+    if (!ifoOpenNewVTSI(target, target->dvd, vtsN))
+      assert(0);
+  
+    /* restore pgc pointer into the new vtsi */
+    if (!set_PGCN(target, pgcN))
+      assert(0);
+    (target->state).pgN = pgN;
+  }
+  
+  return target;
+}
+
+void vm_merge(vm_t *target, vm_t *source) {
+  if(target->vtsi)
+    ifoClose(target->vtsi);
+  memcpy(target, source, sizeof(vm_t));
+  memset(source, 0, sizeof(vm_t));
+}
+
+void vm_free_copy(vm_t *vm) {
+  if(vm->vtsi)
+    ifoClose(vm->vtsi);
+  free(vm);
+}
+
+
+/* regular playback */
+
+void vm_position_get(vm_t *vm, vm_position_t *position) {
+  position->button = (vm->state).HL_BTNN_REG >> 10;
+  position->vts = (vm->state).vtsN; 
+  position->domain = (vm->state).domain; 
+  position->spu_channel = (vm->state).SPST_REG;
+  position->audio_channel = (vm->state).AST_REG;
+  position->angle_channel = (vm->state).AGL_REG;
+  position->hop_channel = vm->hop_channel; /* Increases by one on each hop */
+  position->cell = (vm->state).cellN;
+  position->cell_restart = (vm->state).cell_restart;
+  position->cell_start = (vm->state).pgc->cell_playback[(vm->state).cellN - 1].first_sector;
+  position->still = (vm->state).pgc->cell_playback[(vm->state).cellN - 1].still_time;
+  position->block = (vm->state).blockN;
+
+  /* handle PGC stills at PGC end */
+  if ((vm->state).cellN == (vm->state).pgc->nr_of_cells)
+    position->still += (vm->state).pgc->still_time;
+  /* still already determined */
+  if (position->still)
+    return;
+  /* This is a rough fix for some strange still situations on some strange DVDs.
+   * There are discs (like the German "Back to the Future" RC2) where the only
+   * indication of a still is a cell playback time higher than the time the frames
+   * in this cell actually take to play (like 1 frame with 1 minute playback time).
+   * On the said BTTF disc, for these cells last_sector and last_vobu_start_sector
+   * are equal and the cells are very short, so we abuse these conditions to
+   * detect such discs. I consider these discs broken, so the fix is somewhat
+   * broken, too. */
+  if (((vm->state).pgc->cell_playback[(vm->state).cellN - 1].last_sector ==
+       (vm->state).pgc->cell_playback[(vm->state).cellN - 1].last_vobu_start_sector) &&
+      ((vm->state).pgc->cell_playback[(vm->state).cellN - 1].last_sector -
+       (vm->state).pgc->cell_playback[(vm->state).cellN - 1].first_sector < 1024)) {
+    int time;
+    int size = (vm->state).pgc->cell_playback[(vm->state).cellN - 1].last_sector -
+	       (vm->state).pgc->cell_playback[(vm->state).cellN - 1].first_sector;
+    time  = ((vm->state).pgc->cell_playback[(vm->state).cellN - 1].playback_time.hour   >> 4  ) * 36000;
+    time += ((vm->state).pgc->cell_playback[(vm->state).cellN - 1].playback_time.hour   & 0x0f) * 3600;
+    time += ((vm->state).pgc->cell_playback[(vm->state).cellN - 1].playback_time.minute >> 4  ) * 600;
+    time += ((vm->state).pgc->cell_playback[(vm->state).cellN - 1].playback_time.minute & 0x0f) * 60;
+    time += ((vm->state).pgc->cell_playback[(vm->state).cellN - 1].playback_time.second >> 4  ) * 10;
+    time += ((vm->state).pgc->cell_playback[(vm->state).cellN - 1].playback_time.second & 0x0f) * 1;
+    if (!time || size / time > 30)
+      /* datarate is too high, it might be a very short, but regular cell */
+      return;
+    if (time > 0xff) time = 0xff;
+    position->still = time;
+  }
+}
+
+void vm_get_next_cell(vm_t *vm) {
+  process_command(vm, play_Cell_post(vm));
+}
+
+
+/* Jumping */
+
+int vm_jump_pg(vm_t *vm, int pg) {
+  (vm->state).pgN = pg;
+  process_command(vm, play_PG(vm));
+  return 1;
+}
+
+int vm_jump_cell_block(vm_t *vm, int cell, int block) {
+  (vm->state).cellN = cell;
+  process_command(vm, play_Cell(vm));
+  /* play_Cell can jump to a different cell in case of angles */
+  if ((vm->state).cellN == cell)
+    (vm->state).blockN = block;
+  return 1;
+}
+
+int vm_jump_title_part(vm_t *vm, int title, int part) {
+  link_t link;
+  
+  if(!set_PTT(vm, title, part))
+    return 0;
+  /* Some DVDs do not want us to jump directly into a title and have
+   * PGC pre commands taking us back to some menu. Since we do not like that,
+   * we do not execute PGC pre commands that would do a jump. */
+  /* process_command(vm, play_PGC_PG(vm, (vm->state).pgN)); */
+  link = play_PGC_PG(vm, (vm->state).pgN);
+  if (link.command != PlayThis)
+    /* jump occured -> ignore it and play the PG anyway */
+    process_command(vm, play_PG(vm));
+  else
+    process_command(vm, link);
+  return 1;
+}
+
+int vm_jump_top_pg(vm_t *vm) {
+  process_command(vm, play_PG(vm));
+  return 1;
+}
+
+int vm_jump_next_pg(vm_t *vm) {
+  if((vm->state).pgN >= (vm->state).pgc->nr_of_programs) {
+    /* last program -> move to TailPGC */
+    process_command(vm, play_PGC_post(vm));
+    return 1;
+  } else {
+    vm_jump_pg(vm, (vm->state).pgN + 1);
+    return 1;
+  }
+}
+
+int vm_jump_prev_pg(vm_t *vm) {
+  if ((vm->state).pgN <= 1) {
+    /* first program -> move to last program of previous PGC */
+    if ((vm->state).pgc->prev_pgc_nr && set_PGCN(vm, (vm->state).pgc->prev_pgc_nr)) {
+      process_command(vm, play_PGC(vm));
+      vm_jump_pg(vm, (vm->state).pgc->nr_of_programs);
+      return 1;
+    }
+    return 0;
+  } else {
+    vm_jump_pg(vm, (vm->state).pgN - 1);
+    return 1;
+  }
+}
+
+int vm_jump_up(vm_t *vm) {
+  if((vm->state).pgc->goup_pgc_nr && set_PGCN(vm, (vm->state).pgc->goup_pgc_nr)) {
+    process_command(vm, play_PGC(vm));
+    return 1;
+  }
+  return 0;
+}
+
+int vm_jump_menu(vm_t *vm, DVDMenuID_t menuid) {
+  domain_t old_domain = (vm->state).domain;
+  
+  switch ((vm->state).domain) {
+  case VTS_DOMAIN:
+    set_RSMinfo(vm, 0, (vm->state).blockN);
+    /* FALL THROUGH */
+  case VTSM_DOMAIN:
+  case VMGM_DOMAIN:
+    switch(menuid) {
+    case DVD_MENU_Title:
+    case DVD_MENU_Escape:
+      (vm->state).domain = VMGM_DOMAIN;
+      break;
+    case DVD_MENU_Root:
+    case DVD_MENU_Subpicture:
+    case DVD_MENU_Audio:
+    case DVD_MENU_Angle:
+    case DVD_MENU_Part:
+      (vm->state).domain = VTSM_DOMAIN;
+      break;
+    }
+    if(get_PGCIT(vm) && set_MENU(vm, menuid)) {
+      process_command(vm, play_PGC(vm));
+      return 1;  /* Jump */
+    } else {
+      (vm->state).domain = old_domain;
+    }
+    break;
+  case FP_DOMAIN: /* FIXME XXX $$$ What should we do here? */
+    break;
+  }
+  
+  return 0;
+}
+
+int vm_jump_resume(vm_t *vm) {
+  link_t link_values = { LinkRSM, 0, 0, 0 };
+
+  if (!(vm->state).rsm_vtsN) /* Do we have resume info? */
+    return 0;
+  if (!process_command(vm, link_values))
+    return 0;
+  return 1;
+}
+
+int vm_exec_cmd(vm_t *vm, vm_cmd_t *cmd) {
+  link_t link_values;
+  
+  if(vmEval_CMD(cmd, 1, &(vm->state).registers, &link_values))
+    return process_command(vm, link_values);
+  else
+    return 0; /*  It updated some state thats all... */
+}
+
+
+/* getting information */
+
+int vm_get_current_menu(vm_t *vm, int *menuid) {
+  pgcit_t* pgcit;
+  int pgcn;
+  pgcn = (vm->state).pgcN;
+  pgcit = get_PGCIT(vm);
+  *menuid = pgcit->pgci_srp[pgcn - 1].entry_id & 0xf ;
+  return 1;
+}
+
+int vm_get_current_title_part(vm_t *vm, int *title_result, int *part_result) {
+  vts_ptt_srpt_t *vts_ptt_srpt;
+  int title, part = 0, vts_ttn;
+  int found;
+  int16_t pgcN, pgN;
+
+  vts_ptt_srpt = vm->vtsi->vts_ptt_srpt;
+  pgcN = get_PGCN(vm);
+  pgN = vm->state.pgN;
+
+  found = 0;
+  for (vts_ttn = 0; (vts_ttn < vts_ptt_srpt->nr_of_srpts) && !found; vts_ttn++) {
+    for (part = 0; (part < vts_ptt_srpt->title[vts_ttn].nr_of_ptts) && !found; part++) {
+      if (vts_ptt_srpt->title[vts_ttn].ptt[part].pgcn == pgcN) {
+	if (vts_ptt_srpt->title[vts_ttn].ptt[part].pgn  == pgN) {
+	  found = 1;
+          break;
+	}
+	if (part > 0 && vts_ptt_srpt->title[vts_ttn].ptt[part].pgn > pgN &&
+	    vts_ptt_srpt->title[vts_ttn].ptt[part - 1].pgn < pgN) {
+	  part--;
+	  found = 1;
+	  break;
+	}
+      }
+    }
+    if (found) break;
+  }
+  vts_ttn++;
+  part++;
+  
+  if (!found) {
+    fprintf(MSG_OUT, "libdvdnav: chapter NOT FOUND!\n");
+    return 0;
+  }
+
+  title = get_TT(vm, vm->state.vtsN, vts_ttn);
+
+#ifdef TRACE
+  if (title) {
+    fprintf(MSG_OUT, "libdvdnav: ************ this chapter FOUND!\n");
+    fprintf(MSG_OUT, "libdvdnav: VTS_PTT_SRPT - Title %3i part %3i: PGC: %3i PG: %3i\n",
+             title, part,
+             vts_ptt_srpt->title[vts_ttn-1].ptt[part-1].pgcn ,
+             vts_ptt_srpt->title[vts_ttn-1].ptt[part-1].pgn );
+  }
+#endif
+  *title_result = title;
+  *part_result = part;
+  return 1;
+}
+
+/* Return the substream id for 'logical' audio stream audioN.
+ * 0 <= audioN < 8
+ */
+int vm_get_audio_stream(vm_t *vm, int audioN) {
+  int streamN = -1;
+
+  if((vm->state).domain != VTS_DOMAIN)
+    audioN = 0;
+  
+  if(audioN < 8) {
+    /* Is there any control info for this logical stream */ 
+    if((vm->state).pgc->audio_control[audioN] & (1<<15)) {
+      streamN = ((vm->state).pgc->audio_control[audioN] >> 8) & 0x07;  
+    }
+  }
+  
+  if((vm->state).domain != VTS_DOMAIN && streamN == -1)
+    streamN = 0;
+  
+  /* FIXME: Should also check in vtsi/vmgi status what kind of stream
+   * it is (ac3/lpcm/dts/sdds...) to find the right (sub)stream id */
+  return streamN;
+}
+
+/* Return the substream id for 'logical' subpicture stream subpN and given mode.
+ * 0 <= subpN < 32
+ * mode == 0 - widescreen
+ * mode == 1 - letterbox
+ * mode == 2 - pan&scan
+ */
+int vm_get_subp_stream(vm_t *vm, int subpN, int mode) {
+  int streamN = -1;
+  int source_aspect = vm_get_video_aspect(vm);
+  
+  if((vm->state).domain != VTS_DOMAIN)
+    subpN = 0;
+  
+  if(subpN < 32) { /* a valid logical stream */
+    /* Is this logical stream present */ 
+    if((vm->state).pgc->subp_control[subpN] & (1<<31)) {
+      if(source_aspect == 0) /* 4:3 */	     
+	streamN = ((vm->state).pgc->subp_control[subpN] >> 24) & 0x1f;  
+      if(source_aspect == 3) /* 16:9 */
+        switch (mode) {
+	case 0:
+	  streamN = ((vm->state).pgc->subp_control[subpN] >> 16) & 0x1f;
+	  break;
+	case 1:
+	  streamN = ((vm->state).pgc->subp_control[subpN] >> 8) & 0x1f;
+	  break;
+	case 2:
+	  streamN = (vm->state).pgc->subp_control[subpN] & 0x1f;
+	}
+    }
+  }
+  
+  if((vm->state).domain != VTS_DOMAIN && streamN == -1)
+    streamN = 0;
+
+  /* FIXME: Should also check in vtsi/vmgi status what kind of stream it is. */
+  return streamN;
+}
+
+int vm_get_audio_active_stream(vm_t *vm) {
+  int audioN;
+  int streamN;
+  audioN = (vm->state).AST_REG ;
+  streamN = vm_get_audio_stream(vm, audioN);
+  
+  /* If no such stream, then select the first one that exists. */
+  if(streamN == -1) {
+    for(audioN = 0; audioN < 8; audioN++) {
+      if((vm->state).pgc->audio_control[audioN] & (1<<15)) {
+        if ((streamN = vm_get_audio_stream(vm, audioN)) >= 0)
+          break;
+      }
+    }
+  }
+
+  return streamN;
+}
+
+int vm_get_subp_active_stream(vm_t *vm, int mode) {
+  int subpN;
+  int streamN;
+  subpN = (vm->state).SPST_REG & ~0x40;
+  streamN = vm_get_subp_stream(vm, subpN, mode);
+  
+  /* If no such stream, then select the first one that exists. */
+  if(streamN == -1) {
+    for(subpN = 0; subpN < 32; subpN++) {
+      if((vm->state).pgc->subp_control[subpN] & (1<<31)) {
+        if ((streamN = vm_get_subp_stream(vm, subpN, mode)) >= 0)
+          break;
+      }
+    }
+  }
+
+  if((vm->state).domain == VTS_DOMAIN && !((vm->state).SPST_REG & 0x40))
+    /* Bit 7 set means hide, and only let Forced display show */
+    return (streamN | 0x80);
+  else
+    return streamN;
+}
+
+void vm_get_angle_info(vm_t *vm, int *current, int *num_avail) {
+  *num_avail = 1;
+  *current = 1;
+  
+  if((vm->state).domain == VTS_DOMAIN) {
+    title_info_t *title;
+    /* TTN_REG does not allways point to the correct title.. */
+    if((vm->state).TTN_REG > vm->vmgi->tt_srpt->nr_of_srpts)
+      return;
+    title = &vm->vmgi->tt_srpt->title[(vm->state).TTN_REG - 1];
+    if(title->title_set_nr != (vm->state).vtsN || 
+       title->vts_ttn != (vm->state).VTS_TTN_REG)
+      return; 
+    *num_avail = title->nr_of_angles;
+    *current = (vm->state).AGL_REG;
+  }
+}
+
+#if 0
+/* currently unused */
+void vm_get_audio_info(vm_t *vm, int *current, int *num_avail) {
+  switch ((vm->state).domain) {
+  case VTS_DOMAIN:
+    *num_avail = vm->vtsi->vtsi_mat->nr_of_vts_audio_streams;
+    *current = (vm->state).AST_REG;
+    break;
+  case VTSM_DOMAIN:
+    *num_avail = vm->vtsi->vtsi_mat->nr_of_vtsm_audio_streams; /*  1 */
+    *current = 1;
+    break;
+  case VMGM_DOMAIN:
+  case FP_DOMAIN:
+    *num_avail = vm->vmgi->vmgi_mat->nr_of_vmgm_audio_streams; /*  1 */
+    *current = 1;
+    break;
+  }
+}
+
+/* currently unused */
+void vm_get_subp_info(vm_t *vm, int *current, int *num_avail) {
+  switch ((vm->state).domain) {
+  case VTS_DOMAIN:
+    *num_avail = vm->vtsi->vtsi_mat->nr_of_vts_subp_streams;
+    *current = (vm->state).SPST_REG;
+    break;
+  case VTSM_DOMAIN:
+    *num_avail = vm->vtsi->vtsi_mat->nr_of_vtsm_subp_streams; /*  1 */
+    *current = 0x41;
+    break;
+  case VMGM_DOMAIN:
+  case FP_DOMAIN:
+    *num_avail = vm->vmgi->vmgi_mat->nr_of_vmgm_subp_streams; /*  1 */
+    *current = 0x41;
+    break;
+  }
+}
+
+/* currently unused */
+void vm_get_video_res(vm_t *vm, int *width, int *height) {
+  video_attr_t attr = vm_get_video_attr(vm);
+  
+  if(attr.video_format != 0) 
+    *height = 576;
+  else
+    *height = 480;
+  switch(attr.picture_size) {
+  case 0:
+    *width = 720;
+    break;
+  case 1:
+    *width = 704;
+    break;
+  case 2:
+    *width = 352;
+    break;
+  case 3:
+    *width = 352;
+    *height /= 2;
+    break;
+  }
+}
+#endif
+
+int vm_get_video_aspect(vm_t *vm) {
+  int aspect = vm_get_video_attr(vm).display_aspect_ratio;
+  
+  assert(aspect == 0 || aspect == 3);
+  (vm->state).registers.SPRM[14] &= ~(0x3 << 10);
+  (vm->state).registers.SPRM[14] |= aspect << 10;
+  
+  return aspect;
+}
+
+int vm_get_video_scale_permission(vm_t *vm) {
+  return vm_get_video_attr(vm).permitted_df;
+}
+
+video_attr_t vm_get_video_attr(vm_t *vm) {
+  switch ((vm->state).domain) {
+  case VTS_DOMAIN:
+    return vm->vtsi->vtsi_mat->vts_video_attr;
+  case VTSM_DOMAIN:
+    return vm->vtsi->vtsi_mat->vtsm_video_attr;
+  case VMGM_DOMAIN:
+  case FP_DOMAIN:
+    return vm->vmgi->vmgi_mat->vmgm_video_attr;
+  default:
+    abort();
+  }
+}
+
+audio_attr_t vm_get_audio_attr(vm_t *vm, int streamN) {
+  switch ((vm->state).domain) {
+  case VTS_DOMAIN:
+    return vm->vtsi->vtsi_mat->vts_audio_attr[streamN];
+  case VTSM_DOMAIN:
+    return vm->vtsi->vtsi_mat->vtsm_audio_attr;
+  case VMGM_DOMAIN:
+  case FP_DOMAIN:
+    return vm->vmgi->vmgi_mat->vmgm_audio_attr;
+  default:
+    abort();
+  }
+}
+
+subp_attr_t vm_get_subp_attr(vm_t *vm, int streamN) {
+  switch ((vm->state).domain) {
+  case VTS_DOMAIN:
+    return vm->vtsi->vtsi_mat->vts_subp_attr[streamN];
+  case VTSM_DOMAIN:
+    return vm->vtsi->vtsi_mat->vtsm_subp_attr;
+  case VMGM_DOMAIN:
+  case FP_DOMAIN:
+    return vm->vmgi->vmgi_mat->vmgm_subp_attr;
+  default:
+    abort();
+  }
+}
+
+
+/* Playback control */
+
+static link_t play_PGC(vm_t *vm) {
+  link_t link_values;
+  
+#ifdef TRACE
+  fprintf(MSG_OUT, "libdvdnav: play_PGC:");
+  if((vm->state).domain != FP_DOMAIN) {
+    fprintf(MSG_OUT, " (vm->state).pgcN (%i)\n", get_PGCN(vm));
+  } else {
+    fprintf(MSG_OUT, " first_play_pgc\n");
+  }
+#endif
+
+  /* This must be set before the pre-commands are executed because they
+   * might contain a CallSS that will save resume state */
+
+  /* FIXME: This may be only a temporary fix for something... */
+  (vm->state).pgN = 1;
+  (vm->state).cellN = 0;
+  (vm->state).blockN = 0;
+
+  /* eval -> updates the state and returns either 
+     - some kind of jump (Jump(TT/SS/VTS_TTN/CallSS/link C/PG/PGC/PTTN)
+     - just play video i.e first PG
+       (This is what happens if you fall of the end of the pre_cmds)
+     - or an error (are there more cases?) */
+  if((vm->state).pgc->command_tbl && (vm->state).pgc->command_tbl->nr_of_pre) {
+    if(vmEval_CMD((vm->state).pgc->command_tbl->pre_cmds, 
+		  (vm->state).pgc->command_tbl->nr_of_pre, 
+		  &(vm->state).registers, &link_values)) {
+      /*  link_values contains the 'jump' return value */
+      return link_values;
+    } else {
+#ifdef TRACE
+      fprintf(MSG_OUT, "libdvdnav: PGC pre commands didn't do a Jump, Link or Call\n");
+#endif
+    }
+  }
+  return play_PG(vm);
+}  
+
+static link_t play_PGC_PG(vm_t *vm, int pgN) {    
+  link_t link_values;
+  
+#ifdef TRACE
+  fprintf(MSG_OUT, "libdvdnav: play_PGC_PG:");
+  if((vm->state).domain != FP_DOMAIN) {
+    fprintf(MSG_OUT, " (vm->state).pgcN (%i)\n", get_PGCN(vm));
+  } else {
+    fprintf(MSG_OUT, " first_play_pgc\n");
+  }
+#endif
+
+  /*  This must be set before the pre-commands are executed because they
+   *  might contain a CallSS that will save resume state */
+
+  /* FIXME: This may be only a temporary fix for something... */
+  (vm->state).pgN = pgN;
+  (vm->state).cellN = 0;
+  (vm->state).blockN = 0;
+
+  /* eval -> updates the state and returns either 
+     - some kind of jump (Jump(TT/SS/VTS_TTN/CallSS/link C/PG/PGC/PTTN)
+     - just play video i.e first PG
+       (This is what happens if you fall of the end of the pre_cmds)
+     - or an error (are there more cases?) */
+  if((vm->state).pgc->command_tbl && (vm->state).pgc->command_tbl->nr_of_pre) {
+    if(vmEval_CMD((vm->state).pgc->command_tbl->pre_cmds, 
+		  (vm->state).pgc->command_tbl->nr_of_pre, 
+		  &(vm->state).registers, &link_values)) {
+      /*  link_values contains the 'jump' return value */
+      return link_values;
+    } else {
+#ifdef TRACE
+      fprintf(MSG_OUT, "libdvdnav: PGC pre commands didn't do a Jump, Link or Call\n");
+#endif
+    }
+  }
+  return play_PG(vm);
+}  
+
+static link_t play_PGC_post(vm_t *vm) {
+  link_t link_values;
+
+#ifdef TRACE
+  fprintf(MSG_OUT, "libdvdnav: play_PGC_post:\n");
+#endif
+  
+  /* eval -> updates the state and returns either 
+     - some kind of jump (Jump(TT/SS/VTS_TTN/CallSS/link C/PG/PGC/PTTN)
+     - just go to next PGC
+       (This is what happens if you fall of the end of the post_cmds)
+     - or an error (are there more cases?) */
+  if((vm->state).pgc->command_tbl && (vm->state).pgc->command_tbl->nr_of_post &&
+     vmEval_CMD((vm->state).pgc->command_tbl->post_cmds,
+		(vm->state).pgc->command_tbl->nr_of_post, 
+		&(vm->state).registers, &link_values)) {
+    return link_values;
+  }
+  
+#ifdef TRACE
+  fprintf(MSG_OUT, "libdvdnav: ** Fell of the end of the pgc, continuing in NextPGC\n");
+#endif
+  /* Should end up in the STOP_DOMAIN if next_pgc is 0. */
+  if(!set_PGCN(vm, (vm->state).pgc->next_pgc_nr)) {
+    link_values.command = Exit;
+    return link_values;
+  }
+  return play_PGC(vm);
+}
+
+static link_t play_PG(vm_t *vm) {
+#ifdef TRACE
+  fprintf(MSG_OUT, "libdvdnav: play_PG: (vm->state).pgN (%i)\n", (vm->state).pgN);
+#endif
+  
+  assert((vm->state).pgN > 0);
+  if((vm->state).pgN > (vm->state).pgc->nr_of_programs) {
+#ifdef TRACE
+    fprintf(MSG_OUT, "libdvdnav: play_PG: (vm->state).pgN (%i) > pgc->nr_of_programs (%i)\n", 
+	    (vm->state).pgN, (vm->state).pgc->nr_of_programs );
+#endif
+    assert((vm->state).pgN == (vm->state).pgc->nr_of_programs + 1); 
+    return play_PGC_post(vm);
+  }
+  
+  (vm->state).cellN = (vm->state).pgc->program_map[(vm->state).pgN - 1];
+  
+  return play_Cell(vm);
+}
+
+static link_t play_Cell(vm_t *vm) {
+  static const link_t play_this = {PlayThis, /* Block in Cell */ 0, 0, 0};
+
+#ifdef TRACE
+  fprintf(MSG_OUT, "libdvdnav: play_Cell: (vm->state).cellN (%i)\n", (vm->state).cellN);
+#endif
+  
+  assert((vm->state).cellN > 0);
+  if((vm->state).cellN > (vm->state).pgc->nr_of_cells) {
+#ifdef TRACE
+    fprintf(MSG_OUT, "libdvdnav: (vm->state).cellN (%i) > pgc->nr_of_cells (%i)\n", 
+	    (vm->state).cellN, (vm->state).pgc->nr_of_cells );
+#endif
+    assert((vm->state).cellN == (vm->state).pgc->nr_of_cells + 1); 
+    return play_PGC_post(vm);
+  }
+  
+  /* Multi angle/Interleaved */
+  switch((vm->state).pgc->cell_playback[(vm->state).cellN - 1].block_mode) {
+  case 0: /*  Normal */
+    assert((vm->state).pgc->cell_playback[(vm->state).cellN - 1].block_type == 0);
+    break;
+  case 1: /*  The first cell in the block */
+    switch((vm->state).pgc->cell_playback[(vm->state).cellN - 1].block_type) {
+    case 0: /*  Not part of a block */
+      assert(0);
+      break;
+    case 1: /*  Angle block */
+      /* Loop and check each cell instead? So we don't get outside the block? */
+      (vm->state).cellN += (vm->state).AGL_REG - 1;
+#ifdef STRICT
+      assert((vm->state).cellN <= (vm->state).pgc->nr_of_cells);
+      assert((vm->state).pgc->cell_playback[(vm->state).cellN - 1].block_mode != 0);
+      assert((vm->state).pgc->cell_playback[(vm->state).cellN - 1].block_type == 1);
+#else
+      if (!((vm->state).cellN <= (vm->state).pgc->nr_of_cells) ||
+          !((vm->state).pgc->cell_playback[(vm->state).cellN - 1].block_mode != 0) ||
+	  !((vm->state).pgc->cell_playback[(vm->state).cellN - 1].block_type == 1)) {
+	fprintf(MSG_OUT, "libdvdnav: Invalid angle block\n");
+	(vm->state).cellN -= (vm->state).AGL_REG - 1;
+      }
+#endif
+      break;
+    case 2: /*  ?? */
+    case 3: /*  ?? */
+    default:
+      fprintf(MSG_OUT, "libdvdnav: Invalid? Cell block_mode (%d), block_type (%d)\n",
+	      (vm->state).pgc->cell_playback[(vm->state).cellN - 1].block_mode,
+	      (vm->state).pgc->cell_playback[(vm->state).cellN - 1].block_type);
+      assert(0);
+    }
+    break;
+  case 2: /*  Cell in the block */
+  case 3: /*  Last cell in the block */
+  /* These might perhaps happen for RSM or LinkC commands? */
+  default:
+    fprintf(MSG_OUT, "libdvdnav: Cell is in block but did not enter at first cell!\n");
+  }
+  
+  /* Updates (vm->state).pgN and PTTN_REG */
+  if(!set_PGN(vm)) {
+    /* Should not happen */
+    assert(0);
+    return play_PGC_post(vm);
+  }
+  (vm->state).cell_restart++;
+  (vm->state).blockN = 0;
+#ifdef TRACE
+  fprintf(MSG_OUT, "libdvdnav: Cell should restart here\n");
+#endif
+  return play_this;
+}
+
+static link_t play_Cell_post(vm_t *vm) {
+  cell_playback_t *cell;
+  
+#ifdef TRACE
+  fprintf(MSG_OUT, "libdvdnav: play_Cell_post: (vm->state).cellN (%i)\n", (vm->state).cellN);
+#endif
+  
+  cell = &(vm->state).pgc->cell_playback[(vm->state).cellN - 1];
+  
+  /* Still time is already taken care of before we get called. */
+  
+  /* Deal with a Cell command, if any */
+  if(cell->cell_cmd_nr != 0) {
+    link_t link_values;
+    
+/*  These asserts are now not needed.
+ *  Some DVDs have no cell commands listed in the PGC,
+ *  but the Cell itself points to a cell command that does not exist.
+ *  For this situation, just ignore the cell command and continue.
+ *
+ *  assert((vm->state).pgc->command_tbl != NULL);
+ *  assert((vm->state).pgc->command_tbl->nr_of_cell >= cell->cell_cmd_nr);
+ */
+
+    if ((vm->state).pgc->command_tbl != NULL &&
+        (vm->state).pgc->command_tbl->nr_of_cell >= cell->cell_cmd_nr) {
+#ifdef TRACE
+      fprintf(MSG_OUT, "libdvdnav: Cell command present, executing\n");
+#endif
+      if(vmEval_CMD(&(vm->state).pgc->command_tbl->cell_cmds[cell->cell_cmd_nr - 1], 1,
+		    &(vm->state).registers, &link_values)) {
+        return link_values;
+      } else {
+#ifdef TRACE
+        fprintf(MSG_OUT, "libdvdnav: Cell command didn't do a Jump, Link or Call\n");
+#endif
+      }
+    } else {
+#ifdef TRACE
+      fprintf(MSG_OUT, "libdvdnav: Invalid Cell command\n");
+#endif
+    }
+  }
+  
+  /* Where to continue after playing the cell... */
+  /* Multi angle/Interleaved */
+  switch((vm->state).pgc->cell_playback[(vm->state).cellN - 1].block_mode) {
+  case 0: /*  Normal */
+    assert((vm->state).pgc->cell_playback[(vm->state).cellN - 1].block_type == 0);
+    (vm->state).cellN++;
+    break;
+  case 1: /*  The first cell in the block */
+  case 2: /*  A cell in the block */
+  case 3: /*  The last cell in the block */
+  default:
+    switch((vm->state).pgc->cell_playback[(vm->state).cellN - 1].block_type) {
+    case 0: /*  Not part of a block */
+      assert(0);
+      break;
+    case 1: /*  Angle block */
+      /* Skip the 'other' angles */
+      (vm->state).cellN++;
+      while((vm->state).cellN <= (vm->state).pgc->nr_of_cells &&
+	    (vm->state).pgc->cell_playback[(vm->state).cellN - 1].block_mode >= 2) {
+	(vm->state).cellN++;
+      }
+      break;
+    case 2: /*  ?? */
+    case 3: /*  ?? */
+    default:
+      fprintf(MSG_OUT, "libdvdnav: Invalid? Cell block_mode (%d), block_type (%d)\n",
+	      (vm->state).pgc->cell_playback[(vm->state).cellN - 1].block_mode,
+	      (vm->state).pgc->cell_playback[(vm->state).cellN - 1].block_type);
+      assert(0);
+    }
+    break;
+  }
+  
+  /* Figure out the correct pgN for the new cell */ 
+  if(!set_PGN(vm)) {
+#ifdef TRACE
+    fprintf(MSG_OUT, "libdvdnav: last cell in this PGC\n");
+#endif
+    return play_PGC_post(vm);
+  }
+  return play_Cell(vm);
+}
+
+
+/* link processing */
+
+static int process_command(vm_t *vm, link_t link_values) {
+  
+  while(link_values.command != PlayThis) {
+    
+#ifdef TRACE
+    fprintf(MSG_OUT, "libdvdnav: Before printout starts:\n");
+    vm_print_link(link_values);
+    fprintf(MSG_OUT, "libdvdnav: Link values %i %i %i %i\n", link_values.command, 
+	    link_values.data1, link_values.data2, link_values.data3);
+    vm_print_current_domain_state(vm);
+    fprintf(MSG_OUT, "libdvdnav: Before printout ends.\n");
+#endif
+    
+    switch(link_values.command) {
+    case LinkNoLink:
+      /* BUTTON number:data1 */
+      if(link_values.data1 != 0)
+	(vm->state).HL_BTNN_REG = link_values.data1 << 10;
+      return 0;  /* no actual jump */
+
+    case LinkTopC:
+      /* Restart playing from the beginning of the current Cell. */
+      /* BUTTON number:data1 */
+      if(link_values.data1 != 0)
+	(vm->state).HL_BTNN_REG = link_values.data1 << 10;
+      link_values = play_Cell(vm);
+      break;
+    case LinkNextC:
+      /* Link to Next Cell */
+      /* BUTTON number:data1 */
+      if(link_values.data1 != 0)
+	(vm->state).HL_BTNN_REG = link_values.data1 << 10;
+      (vm->state).cellN += 1;
+      link_values = play_Cell(vm);
+      break;
+    case LinkPrevC:
+      /* Link to Previous Cell */
+      /* BUTTON number:data1 */
+      if(link_values.data1 != 0)
+	(vm->state).HL_BTNN_REG = link_values.data1 << 10;
+      assert((vm->state).cellN > 1);
+      (vm->state).cellN -= 1;
+      link_values = play_Cell(vm);
+      break;
+      
+    case LinkTopPG:
+      /* Link to Top of current Program */
+      /* BUTTON number:data1 */
+      if(link_values.data1 != 0)
+	(vm->state).HL_BTNN_REG = link_values.data1 << 10;
+      link_values = play_PG(vm);
+      break;
+    case LinkNextPG:
+      /* Link to Next Program */
+      /* BUTTON number:data1 */
+      if(link_values.data1 != 0)
+	(vm->state).HL_BTNN_REG = link_values.data1 << 10;
+      (vm->state).pgN += 1;
+      link_values = play_PG(vm);
+      break;
+    case LinkPrevPG:
+      /* Link to Previous Program */
+      /* BUTTON number:data1 */
+      if(link_values.data1 != 0)
+	(vm->state).HL_BTNN_REG = link_values.data1 << 10;
+      assert((vm->state).pgN > 1);
+      (vm->state).pgN -= 1;
+      link_values = play_PG(vm);
+      break;
+
+    case LinkTopPGC:
+      /* Restart playing from beginning of current Program Chain */
+      /* BUTTON number:data1 */
+      if(link_values.data1 != 0)
+	(vm->state).HL_BTNN_REG = link_values.data1 << 10;
+      link_values = play_PGC(vm);
+      break;
+    case LinkNextPGC:
+      /* Link to Next Program Chain */
+      /* BUTTON number:data1 */
+      if(link_values.data1 != 0)
+	(vm->state).HL_BTNN_REG = link_values.data1 << 10;
+      assert((vm->state).pgc->next_pgc_nr != 0);
+      if(set_PGCN(vm, (vm->state).pgc->next_pgc_nr))
+	link_values = play_PGC(vm);
+      else
+	link_values.command = Exit;
+      break;
+    case LinkPrevPGC:
+      /* Link to Previous Program Chain */
+      /* BUTTON number:data1 */
+      if(link_values.data1 != 0)
+	(vm->state).HL_BTNN_REG = link_values.data1 << 10;
+      assert((vm->state).pgc->prev_pgc_nr != 0);
+      if(set_PGCN(vm, (vm->state).pgc->prev_pgc_nr))
+	link_values = play_PGC(vm);
+      else
+	link_values.command = Exit;
+      break;
+    case LinkGoUpPGC:
+      /* Link to GoUp Program Chain */
+      /* BUTTON number:data1 */
+      if(link_values.data1 != 0)
+	(vm->state).HL_BTNN_REG = link_values.data1 << 10;
+      assert((vm->state).pgc->goup_pgc_nr != 0);
+      if(set_PGCN(vm, (vm->state).pgc->goup_pgc_nr))
+	link_values = play_PGC(vm);
+      else
+	link_values.command = Exit;
+      break;
+    case LinkTailPGC:
+      /* Link to Tail of Program Chain */
+      /* BUTTON number:data1 */
+      if(link_values.data1 != 0)
+	(vm->state).HL_BTNN_REG = link_values.data1 << 10;
+      link_values = play_PGC_post(vm);
+    break;
+
+    case LinkRSM:
+      {
+	/* Link to Resume point */
+	int i;
+	
+	/* Check and see if there is any rsm info!! */
+	if (!(vm->state).rsm_vtsN) {
+	  fprintf(MSG_OUT, "libdvdnav: trying to resume without any resume info set\n");
+	  link_values.command = Exit;
+	  break;
+	}
+	
+	(vm->state).domain = VTS_DOMAIN;
+	if (!ifoOpenNewVTSI(vm, vm->dvd, (vm->state).rsm_vtsN))
+	  assert(0);
+	set_PGCN(vm, (vm->state).rsm_pgcN);
+	
+	/* These should never be set in SystemSpace and/or MenuSpace */ 
+	/* (vm->state).TTN_REG = rsm_tt; ?? */
+	/* (vm->state).TT_PGCN_REG = (vm->state).rsm_pgcN; ?? */
+	for(i = 0; i < 5; i++) {
+	  (vm->state).registers.SPRM[4 + i] = (vm->state).rsm_regs[i];
+	}
+	
+	if(link_values.data1 != 0)
+	  (vm->state).HL_BTNN_REG = link_values.data1 << 10;
+	
+	if((vm->state).rsm_cellN == 0) {
+	  assert((vm->state).cellN); /*  Checking if this ever happens */
+	  (vm->state).pgN = 1;
+	  link_values = play_PG(vm);
+	} else { 
+	  /* (vm->state).pgN = ?? this gets the right value in set_PGN() below */
+	  (vm->state).cellN = (vm->state).rsm_cellN;
+	  link_values.command = PlayThis;
+	  link_values.data1 = (vm->state).rsm_blockN & 0xffff;
+	  link_values.data2 = (vm->state).rsm_blockN >> 16;
+	  if(!set_PGN(vm)) {
+	    /* Were at the end of the PGC, should not happen for a RSM */
+	    assert(0);
+	    link_values.command = LinkTailPGC;
+	    link_values.data1 = 0;  /* No button */
+	  }
+	}
+      }
+      break;
+    case LinkPGCN:
+      /* Link to Program Chain Number:data1 */
+      if(!set_PGCN(vm, link_values.data1))
+	assert(0);
+      link_values = play_PGC(vm);
+      break;
+    case LinkPTTN:
+      /* Link to Part of current Title Number:data1 */
+      /* BUTTON number:data2 */
+      /* PGC Pre-Commands are not executed */
+      assert((vm->state).domain == VTS_DOMAIN);
+      if(link_values.data2 != 0)
+	(vm->state).HL_BTNN_REG = link_values.data2 << 10;
+      if(!set_VTS_PTT(vm, (vm->state).vtsN, (vm->state).VTS_TTN_REG, link_values.data1))
+	assert(0);
+      link_values = play_PG(vm);
+      break;
+    case LinkPGN:
+      /* Link to Program Number:data1 */
+      /* BUTTON number:data2 */
+      if(link_values.data2 != 0)
+	(vm->state).HL_BTNN_REG = link_values.data2 << 10;
+      /* Update any other state, PTTN perhaps? */
+      (vm->state).pgN = link_values.data1;
+      link_values = play_PG(vm);
+      break;
+    case LinkCN:
+      /* Link to Cell Number:data1 */
+      /* BUTTON number:data2 */
+      if(link_values.data2 != 0)
+	(vm->state).HL_BTNN_REG = link_values.data2 << 10;
+      /* Update any other state, pgN, PTTN perhaps? */
+      (vm->state).cellN = link_values.data1;
+      link_values = play_Cell(vm);
+      break;
+      
+    case Exit:
+      vm->stopped = 1;
+      return 0;
+      
+    case JumpTT:
+      /* Jump to VTS Title Domain */
+      /* Only allowed from the First Play domain(PGC) */
+      /* or the Video Manager domain (VMG) */
+      /* Stop SPRM9 Timer */
+      /* Set SPRM1 and SPRM2 */
+      assert((vm->state).domain == VMGM_DOMAIN || (vm->state).domain == FP_DOMAIN); /* ?? */
+      if(set_TT(vm, link_values.data1))
+        link_values = play_PGC(vm);
+      else
+	link_values.command = Exit;
+      break;
+    case JumpVTS_TT:
+      /* Jump to Title:data1 in same VTS Title Domain */
+      /* Only allowed from the VTS Menu Domain(VTSM) */
+      /* or the Video Title Set Domain(VTS) */
+      /* Stop SPRM9 Timer */
+      /* Set SPRM1 and SPRM2 */
+      assert((vm->state).domain == VTSM_DOMAIN || (vm->state).domain == VTS_DOMAIN); /* ?? */
+      if(!set_VTS_TT(vm, (vm->state).vtsN, link_values.data1))
+	assert(0);
+      link_values = play_PGC(vm);
+      break;
+    case JumpVTS_PTT:
+      /* Jump to Part:data2 of Title:data1 in same VTS Title Domain */
+      /* Only allowed from the VTS Menu Domain(VTSM) */
+      /* or the Video Title Set Domain(VTS) */
+      /* Stop SPRM9 Timer */
+      /* Set SPRM1 and SPRM2 */
+      assert((vm->state).domain == VTSM_DOMAIN || (vm->state).domain == VTS_DOMAIN); /* ?? */
+      if(!set_VTS_PTT(vm, (vm->state).vtsN, link_values.data1, link_values.data2))
+	assert(0);
+      link_values = play_PGC_PG(vm, (vm->state).pgN);
+      break;
+      
+    case JumpSS_FP:
+      /* Jump to First Play Domain */
+      /* Only allowed from the VTS Menu Domain(VTSM) */
+      /* or the Video Manager domain (VMG) */
+      /* Stop SPRM9 Timer and any GPRM counters */
+      assert((vm->state).domain == VMGM_DOMAIN || (vm->state).domain == VTSM_DOMAIN); /* ?? */
+      if (!set_FP_PGC(vm))
+	assert(0);
+      link_values = play_PGC(vm);
+      break;
+    case JumpSS_VMGM_MENU:
+      /* Jump to Video Manger domain - Title Menu:data1 or any PGC in VMG */
+      /* Allowed from anywhere except the VTS Title domain */
+      /* Stop SPRM9 Timer and any GPRM counters */
+      assert((vm->state).domain != VTS_DOMAIN); /* ?? */
+      (vm->state).domain = VMGM_DOMAIN;
+      if(!set_MENU(vm, link_values.data1))
+	assert(0);
+      link_values = play_PGC(vm);
+      break;
+    case JumpSS_VTSM:
+      /* Jump to a menu in Video Title domain, */
+      /* or to a Menu is the current VTS */
+      /* Stop SPRM9 Timer and any GPRM counters */
+      /* ifoOpenNewVTSI:data1 */
+      /* VTS_TTN_REG:data2 */
+      /* get_MENU:data3 */ 
+      if(link_values.data1 != 0) {
+	if (link_values.data1 != (vm->state).vtsN) {
+	  /* the normal case */
+	  assert((vm->state).domain == VMGM_DOMAIN || (vm->state).domain == FP_DOMAIN); /* ?? */
+	  (vm->state).domain = VTSM_DOMAIN;
+	  if (!ifoOpenNewVTSI(vm, vm->dvd, link_values.data1))  /* Also sets (vm->state).vtsN */
+	    assert(0);
+	} else {
+	  /* This happens on some discs like "Captain Scarlet & the Mysterons" or
+	   * the German RC2 of "Anatomie" in VTSM. */
+	  assert((vm->state).domain == VTSM_DOMAIN ||
+	    (vm->state).domain == VMGM_DOMAIN || (vm->state).domain == FP_DOMAIN); /* ?? */
+	  (vm->state).domain = VTSM_DOMAIN;
+	}
+      } else {
+	/*  This happens on 'The Fifth Element' region 2. */
+	assert((vm->state).domain == VTSM_DOMAIN);
+      }
+      /*  I don't know what title is supposed to be used for. */
+      /*  Alien or Aliens has this != 1, I think. */
+      /* assert(link_values.data2 == 1); */
+      (vm->state).VTS_TTN_REG = link_values.data2;
+      /* TTN_REG (SPRM4), VTS_TTN_REG (SPRM5), TT_PGCN_REG (SPRM6) are linked, */
+      /* so if one changes, the others must change to match it. */
+      (vm->state).TTN_REG     = get_TT(vm, (vm->state).vtsN, (vm->state).VTS_TTN_REG);
+      if(!set_MENU(vm, link_values.data3))
+	assert(0);
+      link_values = play_PGC(vm);
+      break;
+    case JumpSS_VMGM_PGC:
+      /* set_PGCN:data1 */
+      /* Stop SPRM9 Timer and any GPRM counters */
+      assert((vm->state).domain != VTS_DOMAIN); /* ?? */
+      (vm->state).domain = VMGM_DOMAIN;
+      if(!set_PGCN(vm, link_values.data1))
+	assert(0);
+      link_values = play_PGC(vm);
+      break;
+      
+    case CallSS_FP:
+      /* set_RSMinfo:data1 */
+      assert((vm->state).domain == VTS_DOMAIN); /* ?? */
+      /* Must be called before domain is changed */
+      set_RSMinfo(vm, link_values.data1, /* We dont have block info */ 0);
+      set_FP_PGC(vm);
+      link_values = play_PGC(vm);
+      break;
+    case CallSS_VMGM_MENU:
+      /* set_MENU:data1 */ 
+      /* set_RSMinfo:data2 */
+      assert((vm->state).domain == VTS_DOMAIN); /* ?? */
+      /* Must be called before domain is changed */
+      set_RSMinfo(vm, link_values.data2, /* We dont have block info */ 0);      
+      (vm->state).domain = VMGM_DOMAIN;
+      if(!set_MENU(vm, link_values.data1))
+	assert(0);
+      link_values = play_PGC(vm);
+      break;
+    case CallSS_VTSM:
+      /* set_MENU:data1 */ 
+      /* set_RSMinfo:data2 */
+      assert((vm->state).domain == VTS_DOMAIN); /* ?? */
+      /* Must be called before domain is changed */
+      set_RSMinfo(vm, link_values.data2, /* We dont have block info */ 0);
+      (vm->state).domain = VTSM_DOMAIN;
+      if(!set_MENU(vm, link_values.data1))
+	assert(0);
+      link_values = play_PGC(vm);
+      break;
+    case CallSS_VMGM_PGC:
+      /* set_PGC:data1 */
+      /* set_RSMinfo:data2 */
+      assert((vm->state).domain == VTS_DOMAIN); /* ?? */
+      /* Must be called before domain is changed */
+      set_RSMinfo(vm, link_values.data2, /* We dont have block info */ 0);
+      (vm->state).domain = VMGM_DOMAIN;
+      if(!set_PGCN(vm, link_values.data1))
+	assert(0);
+      link_values = play_PGC(vm);
+      break;
+    case PlayThis:
+      /* Should never happen. */
+      assert(0);
+      break;
+    }
+
+#ifdef TRACE
+    fprintf(MSG_OUT, "libdvdnav: After printout starts:\n");
+    vm_print_current_domain_state(vm);
+    fprintf(MSG_OUT, "libdvdnav: After printout ends.\n");
+#endif
+    
+  }
+  (vm->state).blockN = link_values.data1 | (link_values.data2 << 16);
+  return 1;
+}
+
+
+/* Set functions */
+
+static int set_TT(vm_t *vm, int tt) {  
+  return set_PTT(vm, tt, 1);
+}
+
+static int set_PTT(vm_t *vm, int tt, int ptt) {
+  assert(tt <= vm->vmgi->tt_srpt->nr_of_srpts);
+  return set_VTS_PTT(vm, vm->vmgi->tt_srpt->title[tt - 1].title_set_nr,
+		     vm->vmgi->tt_srpt->title[tt - 1].vts_ttn, ptt);
+}
+
+static int set_VTS_TT(vm_t *vm, int vtsN, int vts_ttn) {
+  return set_VTS_PTT(vm, vtsN, vts_ttn, 1);
+}
+
+static int set_VTS_PTT(vm_t *vm, int vtsN, int vts_ttn, int part) {
+  int pgcN, pgN, res;
+  
+  (vm->state).domain = VTS_DOMAIN;
+
+  if (vtsN != (vm->state).vtsN)
+    if (!ifoOpenNewVTSI(vm, vm->dvd, vtsN))  /* Also sets (vm->state).vtsN */
+      return 0;
+  
+  if ((vts_ttn < 1) || (vts_ttn > vm->vtsi->vts_ptt_srpt->nr_of_srpts) ||
+      (part < 1) || (part > vm->vtsi->vts_ptt_srpt->title[vts_ttn - 1].nr_of_ptts) ) {
+    return 0;
+  }
+  
+  pgcN = vm->vtsi->vts_ptt_srpt->title[vts_ttn - 1].ptt[part - 1].pgcn;
+  pgN = vm->vtsi->vts_ptt_srpt->title[vts_ttn - 1].ptt[part - 1].pgn;
+ 
+  (vm->state).TT_PGCN_REG = pgcN;
+  (vm->state).PTTN_REG    = part;
+  (vm->state).TTN_REG     = get_TT(vm, vtsN, vts_ttn);
+  assert( (vm->state.TTN_REG) != 0 );
+  (vm->state).VTS_TTN_REG = vts_ttn;
+  (vm->state).vtsN        = vtsN;  /* Not sure about this one. We can get to it easily from TTN_REG */
+  /* Any other registers? */
+  
+  res = set_PGCN(vm, pgcN);   /* This clobber's state.pgN (sets it to 1), but we don't want clobbering here. */
+  (vm->state).pgN = pgN;
+  return res;
+}
+
+static int set_FP_PGC(vm_t *vm) {  
+  (vm->state).domain = FP_DOMAIN;
+  if (!vm->vmgi->first_play_pgc) {
+    return set_PGCN(vm, 1);
+  }
+  (vm->state).pgc = vm->vmgi->first_play_pgc;
+  (vm->state).pgcN = vm->vmgi->vmgi_mat->first_play_pgc;
+  return 1;
+}
+
+
+static int set_MENU(vm_t *vm, int menu) {
+  assert((vm->state).domain == VMGM_DOMAIN || (vm->state).domain == VTSM_DOMAIN);
+  return set_PGCN(vm, get_ID(vm, menu));
+}
+
+static int set_PGCN(vm_t *vm, int pgcN) {
+  pgcit_t *pgcit;
+  
+  pgcit = get_PGCIT(vm);
+  assert(pgcit != NULL);  /* ?? Make this return -1 instead */
+
+  if(pgcN < 1 || pgcN > pgcit->nr_of_pgci_srp) {
+#ifdef TRACE
+    fprintf(MSG_OUT, "libdvdnav:  ** No such pgcN = %d\n", pgcN);
+#endif
+    return 0;
+  }
+  
+  (vm->state).pgc = pgcit->pgci_srp[pgcN - 1].pgc;
+  (vm->state).pgcN = pgcN;
+  (vm->state).pgN = 1;
+ 
+  if((vm->state).domain == VTS_DOMAIN)
+    (vm->state).TT_PGCN_REG = pgcN;
+
+  return 1;
+}
+
+/* Figure out the correct pgN from the cell and update (vm->state). */ 
+static int set_PGN(vm_t *vm) {
+  int new_pgN = 0;
+  
+  while(new_pgN < (vm->state).pgc->nr_of_programs 
+	&& (vm->state).cellN >= (vm->state).pgc->program_map[new_pgN])
+    new_pgN++;
+  
+  if(new_pgN == (vm->state).pgc->nr_of_programs) /* We are at the last program */
+    if((vm->state).cellN > (vm->state).pgc->nr_of_cells)
+      return 0; /* We are past the last cell */
+  
+  (vm->state).pgN = new_pgN;
+  
+  if((vm->state).domain == VTS_DOMAIN) {
+    playback_type_t *pb_ty;
+    if((vm->state).TTN_REG > vm->vmgi->tt_srpt->nr_of_srpts)
+      return 0; /* ?? */
+    pb_ty = &vm->vmgi->tt_srpt->title[(vm->state).TTN_REG - 1].pb_ty;
+    if(pb_ty->multi_or_random_pgc_title == /* One_Sequential_PGC_Title */ 0) {
+      int dummy, part;
+      vm_get_current_title_part(vm, &dummy, &part);
+      (vm->state).PTTN_REG = part;
+    } else {
+      /* FIXME: Handle RANDOM or SHUFFLE titles. */
+      fprintf(MSG_OUT, "libdvdnav: RANDOM or SHUFFLE titles are NOT handled yet.\n");
+    }
+  }
+  return 1;
+}
+
+/* Must be called before domain is changed (set_PGCN()) */
+static void set_RSMinfo(vm_t *vm, int cellN, int blockN) {
+  int i;
+  
+  if(cellN) {
+    (vm->state).rsm_cellN = cellN;
+    (vm->state).rsm_blockN = blockN;
+  } else {
+    (vm->state).rsm_cellN = (vm->state).cellN;
+    (vm->state).rsm_blockN = blockN;
+  }
+  (vm->state).rsm_vtsN = (vm->state).vtsN;
+  (vm->state).rsm_pgcN = get_PGCN(vm);
+  
+  /* assert((vm->state).rsm_pgcN == (vm->state).TT_PGCN_REG);  for VTS_DOMAIN */
+  
+  for(i = 0; i < 5; i++) {
+    (vm->state).rsm_regs[i] = (vm->state).registers.SPRM[4 + i];
+  }
+}
+
+
+/* Get functions */
+
+/* Searches the TT tables, to find the current TT.
+ * returns the current TT.
+ * returns 0 if not found.
+ */
+static int get_TT(vm_t *vm, int vtsN, int vts_ttn) {
+  int i;
+  int tt=0;
+
+  for(i = 1; i <= vm->vmgi->tt_srpt->nr_of_srpts; i++) {
+    if( vm->vmgi->tt_srpt->title[i - 1].title_set_nr == vtsN && 
+        vm->vmgi->tt_srpt->title[i - 1].vts_ttn == vts_ttn) {
+      tt=i;
+      break;
+    }
+  }
+  return tt;
+}
+
+/* Search for entry_id match of the PGC Category in the current VTS PGCIT table.
+ * Return pgcN based on entry_id match.
+ */
+static int get_ID(vm_t *vm, int id) {
+  int pgcN, i;
+  pgcit_t *pgcit;
+  
+  /* Relies on state to get the correct pgcit. */
+  pgcit = get_PGCIT(vm);
+  assert(pgcit != NULL);
+#ifdef TRACE
+  fprintf(MSG_OUT, "libdvdnav: ** Searching for menu (0x%x) entry PGC\n", id);
+#endif
+
+  /* Force high bit set. */
+  id |=0x80;
+
+  /* Get menu/title */
+  for(i = 0; i < pgcit->nr_of_pgci_srp; i++) {
+    if( (pgcit->pgci_srp[i].entry_id) == id) {
+      pgcN = i + 1;
+#ifdef TRACE
+      fprintf(MSG_OUT, "libdvdnav: Found menu.\n");
+#endif
+      return pgcN;
+    }
+  }
+#ifdef TRACE
+  fprintf(MSG_OUT, "libdvdnav: ** No such id/menu (0x%02x) entry PGC\n", id & 0x7f);
+  for(i = 0; i < pgcit->nr_of_pgci_srp; i++) {
+    if ( (pgcit->pgci_srp[i].entry_id & 0x80) == 0x80) {
+      fprintf(MSG_OUT, "libdvdnav: Available menus: 0x%x\n",
+                     pgcit->pgci_srp[i].entry_id & 0x7f);
+    }
+  }
+#endif
+  return 0; /*  error */
+}
+
+/* FIXME: we have a pgcN member in the vm's state now, so this should be obsolete */
+static int get_PGCN(vm_t *vm) {
+  pgcit_t *pgcit;
+  int pgcN = 1;
+
+  pgcit = get_PGCIT(vm);
+  
+  if (pgcit) {
+    while(pgcN <= pgcit->nr_of_pgci_srp) {
+      if(pgcit->pgci_srp[pgcN - 1].pgc == (vm->state).pgc) {
+	assert((vm->state).pgcN == pgcN);
+	return pgcN;
+      }
+      pgcN++;
+    }
+  }
+  fprintf(MSG_OUT, "libdvdnav: get_PGCN failed. Was trying to find pgcN in domain %d\n", 
+         (vm->state).domain);
+  return 0; /*  error */
+}
+
+static pgcit_t* get_MENU_PGCIT(vm_t *vm, ifo_handle_t *h, uint16_t lang) {
+  int i;
+  
+  if(h == NULL || h->pgci_ut == NULL) {
+    fprintf(MSG_OUT, "libdvdnav: *** pgci_ut handle is NULL ***\n");
+    return NULL; /*  error? */
+  }
+  
+  i = 0;
+  while(i < h->pgci_ut->nr_of_lus
+	&& h->pgci_ut->lu[i].lang_code != lang)
+    i++;
+  if(i == h->pgci_ut->nr_of_lus) {
+    fprintf(MSG_OUT, "libdvdnav: Language '%c%c' not found, using '%c%c' instead\n",
+	    (char)(lang >> 8), (char)(lang & 0xff),
+ 	    (char)(h->pgci_ut->lu[0].lang_code >> 8),
+	    (char)(h->pgci_ut->lu[0].lang_code & 0xff));
+    fprintf(MSG_OUT, "libdvdnav: Menu Languages available: ");
+    for(i = 0; i < h->pgci_ut->nr_of_lus; i++) {
+      fprintf(MSG_OUT, "%c%c ",
+ 	    (char)(h->pgci_ut->lu[i].lang_code >> 8),
+	    (char)(h->pgci_ut->lu[i].lang_code & 0xff));
+    }
+    fprintf(MSG_OUT, "\n");
+    i = 0; /*  error? */
+  }
+  
+  return h->pgci_ut->lu[i].pgcit;
+}
+
+/* Uses state to decide what to return */
+static pgcit_t* get_PGCIT(vm_t *vm) {
+  pgcit_t *pgcit;
+  
+  switch ((vm->state).domain) {
+  case VTS_DOMAIN:
+    pgcit = vm->vtsi->vts_pgcit;
+    break;
+  case VTSM_DOMAIN:
+    pgcit = get_MENU_PGCIT(vm, vm->vtsi, (vm->state).registers.SPRM[0]);
+    break;
+  case VMGM_DOMAIN:
+  case FP_DOMAIN:
+    pgcit = get_MENU_PGCIT(vm, vm->vmgi, (vm->state).registers.SPRM[0]);
+    break;
+  default:
+    abort();
+  }
+  
+  return pgcit;
+}
+
+
+/* Debug functions */
+
+#ifdef TRACE
+void vm_position_print(vm_t *vm, vm_position_t *position) {
+  fprintf(MSG_OUT, "libdvdnav: But=%x Spu=%x Aud=%x Ang=%x Hop=%x vts=%x dom=%x cell=%x cell_restart=%x cell_start=%x still=%x block=%x\n",
+  position->button,
+  position->spu_channel,
+  position->audio_channel,
+  position->angle_channel,
+  position->hop_channel,
+  position->vts,
+  position->domain,
+  position->cell,
+  position->cell_restart,
+  position->cell_start,
+  position->still,
+  position->block);
+}
+#endif
+