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, 1093 insertions, 0 deletions

diff --git a/libdvdnav/dvdnav.c b/libdvdnav/dvdnav.c
new file mode 100644
index 0000000..00ffd7d
--- /dev/null
+++ b/libdvdnav/dvdnav.c
@@ -0,0 +1,1093 @@
+/* 
+ * Copyright (C) 2000 Rich Wareham <[email protected]>
+ * 
+ * This file is part of libdvdnav, a DVD navigation library.
+ * 
+ * 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: dvdnav.c,v 1.34 2005/10/15 14:04:05 jcdutton Exp $
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+/*
+#define LOG_DEBUG
+*/
+#include "common.h"
+#include "dvdnav_internal.h"
+#include "read_cache.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/time.h>
+
+#include "remap.h"
+#include "dvdread.h"
+
+static dvdnav_status_t dvdnav_clear(dvdnav_t * this) {
+  /* clear everything except file, vm, mutex, readahead */
+
+  if (this->file) DVDCloseFile(this->file);
+  this->file = NULL;
+
+  memset(&this->pci,0,sizeof(this->pci));
+  memset(&this->dsi,0,sizeof(this->dsi));
+  this->last_cmd_nav_lbn = SRI_END_OF_CELL;
+
+  /* Set initial values of flags */
+  this->position_current.still = 0;
+  this->skip_still = 0;
+  this->sync_wait = 0;
+  this->sync_wait_skip = 0;
+  this->spu_clut_changed = 0;
+  this->started = 0;
+
+  dvdnav_read_cache_clear(this->cache);
+  
+  return DVDNAV_STATUS_OK;
+} 
+
+
+dvdnav_status_t dvdnav_open(dvdnav_t** dest, const char *path,dvd_reader_t *dvd) {
+  dvdnav_t *this;
+  struct timeval time;
+  
+  /* Create a new structure */
+  fprintf(MSG_OUT, "libdvdnav: Using dvdnav version %s from http://xine.sf.net\n", VERSION);
+
+  (*dest) = NULL;
+  this = (dvdnav_t*)malloc(sizeof(dvdnav_t));
+  if(!this)
+    return DVDNAV_STATUS_ERR;
+  memset(this, 0, (sizeof(dvdnav_t) ) ); /* Make sure this structure is clean */
+ 
+  pthread_mutex_init(&this->vm_lock, NULL);
+  /* Initialise the error string */
+  printerr("");
+
+  /* Initialise the VM */
+  this->vm = vm_new_vm();
+  if(!this->vm) {
+    printerr("Error initialising the DVD VM.");
+    pthread_mutex_destroy(&this->vm_lock);
+    free(this);
+    return DVDNAV_STATUS_ERR;
+  }
+  this->vm->openedDvd=dvd;
+  if(!vm_reset(this->vm, path)) {
+    printerr("Error starting the VM / opening the DVD device.");
+    pthread_mutex_destroy(&this->vm_lock);
+    vm_free_vm(this->vm);
+    free(this);
+    return DVDNAV_STATUS_ERR;
+  }
+
+  /* Set the path. FIXME: Is a deep copy 'right' */
+  strncpy(this->path, path, MAX_PATH_LEN);
+
+  /* Pre-open and close a file so that the CSS-keys are cached. */
+  this->file = DVDOpenFile(vm_get_dvd_reader(this->vm), 0, DVD_READ_MENU_VOBS);
+    
+  /* Start the read-ahead cache. */
+  this->cache = dvdnav_read_cache_new(this);
+
+  /* Seed the random numbers. So that the DVD VM Command rand()
+   * gives a different start value each time a DVD is played. */
+  gettimeofday(&time, NULL);
+  srand(time.tv_usec);
+ 
+  dvdnav_clear(this);
+ 
+  (*dest) = this;
+  return DVDNAV_STATUS_OK;
+}
+
+
+
+dvdnav_status_t dvdnav_close(dvdnav_t *this) {
+
+#ifdef LOG_DEBUG
+  fprintf(MSG_OUT, "libdvdnav: close:called\n");
+#endif
+
+  if(!this) {
+    printerr("Passed a NULL pointer.");
+    return DVDNAV_STATUS_ERR;
+  }
+
+  if (this->file) {
+    DVDCloseFile(this->file);
+#ifdef LOG_DEBUG
+    fprintf(MSG_OUT, "libdvdnav: close:file closing\n");
+#endif
+    this->file = NULL;
+  }
+
+  /* Free the VM */
+  if(this->vm)
+    vm_free_vm(this->vm);
+
+  pthread_mutex_destroy(&this->vm_lock);
+
+  /* We leave the final freeing of the entire structure to the cache,
+   * because we don't know, if there are still buffers out in the wild,
+   * that must return first. */
+  if(this->cache)
+    dvdnav_read_cache_free(this->cache);
+  else
+    free(this);
+  
+  return DVDNAV_STATUS_OK;
+}
+
+dvdnav_status_t dvdnav_reset(dvdnav_t *this) {
+  dvdnav_status_t result;
+
+#ifdef LOG_DEBUG
+  fprintf(MSG_OUT, "libdvdnav: reset:called\n");
+#endif
+
+  if(!this) {
+    printerr("Passed a NULL pointer.");
+    return DVDNAV_STATUS_ERR;
+  }
+
+  pthread_mutex_lock(&this->vm_lock); 
+
+#ifdef LOG_DEBUG
+  fprintf(MSG_OUT, "libdvdnav: reseting vm\n");
+#endif
+  if(!vm_reset(this->vm, NULL)) {
+    printerr("Error restarting the VM.");
+    pthread_mutex_unlock(&this->vm_lock); 
+    return DVDNAV_STATUS_ERR;
+  }
+#ifdef LOG_DEBUG
+  fprintf(MSG_OUT, "libdvdnav: clearing dvdnav\n");
+#endif
+  result = dvdnav_clear(this);
+
+  pthread_mutex_unlock(&this->vm_lock); 
+  return result;
+}
+
+dvdnav_status_t dvdnav_path(dvdnav_t *this, const char** path) {
+
+  if(!this || !path) {
+    printerr("Passed a NULL pointer.");
+    return DVDNAV_STATUS_ERR;
+  }
+
+  (*path) = this->path;
+
+  return DVDNAV_STATUS_OK;
+}
+
+const char* dvdnav_err_to_string(dvdnav_t *this) {
+  
+  if(!this)
+    return "Hey! You gave me a NULL pointer you naughty person!";
+  
+  return this->err_str;
+}
+
+/* converts a dvd_time_t to PTS ticks */
+int64_t dvdnav_convert_time(dvd_time_t *time) {
+  int64_t result;
+  int64_t frames;
+  
+  result  = (time->hour    >> 4  ) * 10 * 60 * 60 * 90000;
+  result += (time->hour    & 0x0f)      * 60 * 60 * 90000;
+  result += (time->minute  >> 4  )      * 10 * 60 * 90000;
+  result += (time->minute  & 0x0f)           * 60 * 90000;
+  result += (time->second  >> 4  )           * 10 * 90000;
+  result += (time->second  & 0x0f)                * 90000;
+  
+  frames  = ((time->frame_u & 0x30) >> 4) * 10;
+  frames += ((time->frame_u & 0x0f)     )     ;
+  
+  if (time->frame_u & 0x80)
+    result += frames * 3000;
+  else
+    result += frames * 3600;
+  
+  return result;
+}
+
+/*
+ * Returns 1 if block contains NAV packet, 0 otherwise.
+ * Processes said NAV packet if present.
+ *
+ * Most of the code in here is copied from xine's MPEG demuxer
+ * so any bugs which are found in that should be corrected here also.
+ */
+static int32_t dvdnav_decode_packet(dvdnav_t *this, uint8_t *p, dsi_t *nav_dsi, pci_t *nav_pci) {
+  int32_t        bMpeg1 = 0;
+  uint32_t       nHeaderLen;
+  uint32_t       nPacketLen;
+  uint32_t       nStreamID;
+
+  if (p[3] == 0xBA) { /* program stream pack header */
+    int32_t nStuffingBytes;
+
+    bMpeg1 = (p[4] & 0x40) == 0;
+
+    if (bMpeg1) {
+      p += 12;
+    } else { /* mpeg2 */
+      nStuffingBytes = p[0xD] & 0x07;
+      p += 14 + nStuffingBytes;
+    }
+  }
+
+  if (p[3] == 0xbb) { /* program stream system header */
+    nHeaderLen = (p[4] << 8) | p[5];
+    p += 6 + nHeaderLen;
+  }
+
+  /* we should now have a PES packet here */
+  if (p[0] || p[1] || (p[2] != 1)) {
+    fprintf(MSG_OUT, "libdvdnav: demux error! %02x %02x %02x (should be 0x000001) \n",p[0],p[1],p[2]);
+    return 0;
+  }
+
+  nPacketLen = p[4] << 8 | p[5];
+  nStreamID  = p[3];
+
+  nHeaderLen = 6;
+  p += nHeaderLen;
+
+  if (nStreamID == 0xbf) { /* Private stream 2 */
+#if 0
+    int32_t i;
+    fprintf(MSG_OUT, "libdvdnav: nav packet=%u\n",p-p_start-6);
+    for(i=0;i<80;i++)
+      fprintf(MSG_OUT, "%02x ",p[i-6]);
+    fprintf(MSG_OUT, "\n");
+#endif
+
+    if(p[0] == 0x00) {
+      navRead_PCI(nav_pci, p+1);
+    }
+
+    p += nPacketLen;
+
+    /* We should now have a DSI packet. */
+    if(p[6] == 0x01) {
+      nPacketLen = p[4] << 8 | p[5];
+      p += 6;
+      navRead_DSI(nav_dsi, p+1);
+    } 
+
+    return 1;
+  }
+  return 0;
+}
+
+/* DSI is used for most angle stuff. 
+ * PCI is used for only non-seemless angle stuff
+ */ 
+static int32_t dvdnav_get_vobu(dvdnav_t *this, dsi_t *nav_dsi, pci_t *nav_pci, dvdnav_vobu_t *vobu) {
+  uint32_t next;
+  int32_t angle, num_angle;
+
+  vobu->vobu_start = nav_dsi->dsi_gi.nv_pck_lbn; /* Absolute offset from start of disk */
+  vobu->vobu_length = nav_dsi->dsi_gi.vobu_ea; /* Relative offset from vobu_start */
+     
+  /*
+   * If we're not at the end of this cell, we can determine the next
+   * VOBU to display using the VOBU_SRI information section of the
+   * DSI.  Using this value correctly follows the current angle,
+   * avoiding the doubled scenes in The Matrix, and makes our life
+   * really happy.
+   *
+   * vobu_next is an offset value, 0x3fffffff = SRI_END_OF_CELL
+   * DVDs are about 6 Gigs, which is only up to 0x300000 blocks
+   * Should really assert if bit 31 != 1
+   */
+  
+#if 0
+  /* Old code -- may still be useful one day */
+  if(nav_dsi->vobu_sri.next_vobu != SRI_END_OF_CELL ) {
+    vobu->vobu_next = ( nav_dsi->vobu_sri.next_vobu & 0x3fffffff );
+  } else {
+    vobu->vobu_next = vobu->vobu_length;
+  }
+#else
+  /* Relative offset from vobu_start */
+  vobu->vobu_next = ( nav_dsi->vobu_sri.next_vobu & 0x3fffffff );
+#endif
+  
+  vm_get_angle_info(this->vm, &angle, &num_angle);
+
+  /* FIMXE: The angle reset doesn't work for some reason for the moment */
+#if 0
+  if((num_angle < angle) && (angle != 1)) {
+    fprintf(MSG_OUT, "libdvdnav: angle ends!\n");
+    
+    /* This is to switch back to angle one when we
+     * finish with angles. */
+    dvdnav_angle_change(this, 1);
+  } 
+#endif
+
+  if(num_angle != 0) {
+    
+    if((next = nav_pci->nsml_agli.nsml_agl_dsta[angle-1]) != 0) {
+      if((next & 0x3fffffff) != 0) {
+	if(next & 0x80000000)
+	  vobu->vobu_next = - (int32_t)(next & 0x3fffffff);
+	else
+	  vobu->vobu_next = + (int32_t)(next & 0x3fffffff);
+      }
+    } else if((next = nav_dsi->sml_agli.data[angle-1].address) != 0) {
+      vobu->vobu_length = nav_dsi->sml_pbi.ilvu_ea;
+      
+      if((next & 0x80000000) && (next != 0x7fffffff))
+	vobu->vobu_next =  - (int32_t)(next & 0x3fffffff);
+      else
+	vobu->vobu_next =  + (int32_t)(next & 0x3fffffff);
+    }
+  }
+
+  return 1;
+}
+
+/*
+ * These are the main get_next_block function which actually get the media stream video and audio etc.
+ *
+ * There are two versions: The second one is using the zero-copy read ahead cache and therefore
+ * hands out pointers targetting directly into the cache.
+ * The first one uses a memcopy to fill this cache block into the application provided memory.
+ * The benefit of this first one is that no special memory management is needed. The application is
+ * the only one responsible of allocating and freeing the memory associated with the pointer.
+ * The drawback is the additional memcopy.
+ */
+
+dvdnav_status_t dvdnav_get_next_block(dvdnav_t *this, uint8_t *buf,
+				      int32_t *event, int32_t *len) {
+  unsigned char *block;
+  dvdnav_status_t status;
+  
+  block = buf;
+  status = dvdnav_get_next_cache_block(this, &block, event, len);
+  if (status == DVDNAV_STATUS_OK && block != buf) {
+    /* we received a block from the cache, copy it, so we can give it back */
+    memcpy(buf, block, DVD_VIDEO_LB_LEN);
+    dvdnav_free_cache_block(this, block);
+  }
+  return status;
+}
+ 
+dvdnav_status_t dvdnav_get_next_cache_block(dvdnav_t *this, uint8_t **buf,
+					    int32_t *event, int32_t *len) {
+  dvd_state_t *state;
+  int32_t result;
+
+  if(!this || !event || !len || !buf || !*buf) {
+    printerr("Passed a NULL pointer.");
+    return DVDNAV_STATUS_ERR;
+  }
+
+  pthread_mutex_lock(&this->vm_lock);
+  
+  if(!this->started) {
+    /* Start the VM */
+    if (!vm_start(this->vm)) {
+      printerr("Encrypted or faulty DVD");
+      return DVDNAV_STATUS_ERR;
+    }
+    this->started = 1;
+  }
+
+  state = &(this->vm->state);
+  (*event) = DVDNAV_NOP;
+  (*len) = 0;
+ 
+  /* Check the STOP flag */
+  if(this->vm->stopped) {
+    vm_stop(this->vm);
+    (*event) = DVDNAV_STOP;
+    this->started = 0;
+    pthread_mutex_unlock(&this->vm_lock); 
+    return DVDNAV_STATUS_OK;
+  }
+
+  vm_position_get(this->vm, &this->position_next);
+  
+#ifdef LOG_DEBUG
+  fprintf(MSG_OUT, "libdvdnav: POS-NEXT ");
+  vm_position_print(this->vm, &this->position_next);
+  fprintf(MSG_OUT, "libdvdnav: POS-CUR  ");
+  vm_position_print(this->vm, &this->position_current);
+#endif
+
+  /* did we hop? */
+  if(this->position_current.hop_channel != this->position_next.hop_channel) {
+    (*event) = DVDNAV_HOP_CHANNEL;
+#ifdef LOG_DEBUG
+    fprintf(MSG_OUT, "libdvdnav: HOP_CHANNEL\n");
+#endif
+    if (this->position_next.hop_channel - this->position_current.hop_channel >= HOP_SEEK) {
+      int32_t num_angles = 0, current;
+      
+      /* we seeked -> check for multiple angles */
+      vm_get_angle_info(this->vm, &current, &num_angles);
+      if (num_angles > 1) {
+        int32_t result, block;
+	/* we have to skip the first VOBU when seeking in a multiangle feature,
+	 * because it might belong to the wrong angle */
+	block = this->position_next.cell_start + this->position_next.block;
+	result = dvdnav_read_cache_block(this->cache, block, 1, buf);
+	if(result <= 0) {
+	  printerr("Error reading NAV packet.");
+	  pthread_mutex_unlock(&this->vm_lock); 
+	  return DVDNAV_STATUS_ERR;
+	}
+	/* Decode nav into pci and dsi. Then get next VOBU info. */
+	if(!dvdnav_decode_packet(this, *buf, &this->dsi, &this->pci)) {
+	  printerr("Expected NAV packet but none found.");
+	  pthread_mutex_unlock(&this->vm_lock); 
+	  return DVDNAV_STATUS_ERR;
+	}
+	dvdnav_get_vobu(this, &this->dsi, &this->pci, &this->vobu);
+	/* skip to next, if there is a next */
+	if (this->vobu.vobu_next != SRI_END_OF_CELL) {
+	  this->vobu.vobu_start += this->vobu.vobu_next;
+	  this->vobu.vobu_next   = 0;
+	}
+	/* update VM state */
+	this->vm->state.blockN = this->vobu.vobu_start - this->position_next.cell_start;
+      }
+    }
+    this->position_current.hop_channel = this->position_next.hop_channel;
+    /* update VOBU info */
+    this->vobu.vobu_start  = this->position_next.cell_start + this->position_next.block;
+    this->vobu.vobu_next   = 0;
+    /* Make blockN == vobu_length to do expected_nav */
+    this->vobu.vobu_length = 0;
+    this->vobu.blockN      = 0;
+    this->sync_wait        = 0;
+    pthread_mutex_unlock(&this->vm_lock); 
+    return DVDNAV_STATUS_OK;
+  }
+
+  /* Check the HIGHLIGHT flag */
+  if(this->position_current.button != this->position_next.button) {
+    dvdnav_highlight_event_t *hevent = (dvdnav_highlight_event_t *)*buf;
+
+    (*event) = DVDNAV_HIGHLIGHT;
+#ifdef LOG_DEBUG
+    fprintf(MSG_OUT, "libdvdnav: HIGHLIGHT\n");
+#endif
+    (*len) = sizeof(dvdnav_highlight_event_t);
+    hevent->display = 1;
+    hevent->buttonN = this->position_next.button;
+    this->position_current.button = this->position_next.button;
+    pthread_mutex_unlock(&this->vm_lock); 
+    return DVDNAV_STATUS_OK;
+  }
+  
+  /* Check the WAIT flag */
+  if(this->sync_wait) {
+    (*event) = DVDNAV_WAIT;
+#ifdef LOG_DEBUG
+    fprintf(MSG_OUT, "libdvdnav: WAIT\n");
+#endif
+    (*len) = 0;
+    pthread_mutex_unlock(&this->vm_lock);
+    return DVDNAV_STATUS_OK;
+  }
+
+  /* Check to see if we need to change the currently opened VOB */
+  if((this->position_current.vts != this->position_next.vts) || 
+     (this->position_current.domain != this->position_next.domain)) {
+    dvd_read_domain_t domain;
+    int32_t vtsN;
+    dvdnav_vts_change_event_t *vts_event = (dvdnav_vts_change_event_t *)*buf;
+    
+    if(this->file) {
+      DVDCloseFile(this->file);
+      this->file = NULL;
+    }
+
+    vts_event->old_vtsN = this->position_current.vts;
+    vts_event->old_domain = this->position_current.domain;
+     
+    /* Use the DOMAIN to find whether to open menu or title VOBs */
+    switch(this->position_next.domain) {
+    case FP_DOMAIN:
+    case VMGM_DOMAIN:
+      domain = DVD_READ_MENU_VOBS;
+      vtsN = 0;
+      break;
+    case VTSM_DOMAIN:
+      domain = DVD_READ_MENU_VOBS;
+      vtsN = this->position_next.vts; 
+      break;
+    case VTS_DOMAIN:
+      domain = DVD_READ_TITLE_VOBS;
+      vtsN = this->position_next.vts; 
+      break;
+    default:
+      printerr("Unknown domain when changing VTS.");
+      pthread_mutex_unlock(&this->vm_lock); 
+      return DVDNAV_STATUS_ERR;
+    }
+    
+    this->position_current.vts = this->position_next.vts; 
+    this->position_current.domain = this->position_next.domain;
+    dvdnav_read_cache_clear(this->cache);
+    this->file = DVDOpenFile(vm_get_dvd_reader(this->vm), vtsN, domain);
+    vts_event->new_vtsN = this->position_next.vts; 
+    vts_event->new_domain = this->position_next.domain; 
+
+    /* If couldn't open the file for some reason, moan */
+    if(this->file == NULL) {
+      printerrf("Error opening vtsN=%i, domain=%i.", vtsN, domain);
+      pthread_mutex_unlock(&this->vm_lock); 
+      return DVDNAV_STATUS_ERR;
+    }
+
+    /* File opened successfully so return a VTS change event */
+    (*event) = DVDNAV_VTS_CHANGE;
+#ifdef LOG_DEBUG
+    fprintf(MSG_OUT, "libdvdnav: VTS_CHANGE\n");
+#endif
+    (*len) = sizeof(dvdnav_vts_change_event_t);
+
+    this->spu_clut_changed = 1;
+    this->position_current.cell = -1; /* Force an update */
+    this->position_current.spu_channel = -1; /* Force an update */
+    this->position_current.audio_channel = -1; /* Force an update */;
+     
+    pthread_mutex_unlock(&this->vm_lock); 
+    return DVDNAV_STATUS_OK;
+  }
+
+  /* Check if the cell changed */  
+  if( (this->position_current.cell != this->position_next.cell) ||
+      (this->position_current.cell_restart != this->position_next.cell_restart) ||
+      (this->position_current.cell_start != this->position_next.cell_start) ) {
+    dvdnav_cell_change_event_t *cell_event = (dvdnav_cell_change_event_t *)*buf;
+    int32_t first_cell_nr, last_cell_nr, i;
+    dvd_state_t *state = &this->vm->state;
+    
+    (*event) = DVDNAV_CELL_CHANGE;
+#ifdef LOG_DEBUG
+    fprintf(MSG_OUT, "libdvdnav: CELL_CHANGE\n");
+#endif
+    (*len) = sizeof(dvdnav_cell_change_event_t);
+    
+    cell_event->cellN = state->cellN;
+    cell_event->pgN   = state->pgN;
+    cell_event->cell_length =
+      dvdnav_convert_time(&state->pgc->cell_playback[state->cellN-1].playback_time);
+
+    cell_event->pg_length = 0;
+    /* Find start cell of program. */
+    first_cell_nr = state->pgc->program_map[state->pgN-1];
+    /* Find end cell of program */
+    if(state->pgN < state->pgc->nr_of_programs)
+      last_cell_nr = state->pgc->program_map[state->pgN] - 1;
+    else
+      last_cell_nr = state->pgc->nr_of_cells;
+    for (i = first_cell_nr; i <= last_cell_nr; i++)
+      cell_event->pg_length +=
+        dvdnav_convert_time(&state->pgc->cell_playback[i - 1].playback_time);
+    cell_event->pgc_length = dvdnav_convert_time(&state->pgc->playback_time);
+
+    cell_event->cell_start = 0;
+    for (i = 1; i < state->cellN; i++)
+      cell_event->cell_start +=
+        dvdnav_convert_time(&state->pgc->cell_playback[i - 1].playback_time);
+
+    cell_event->pg_start = 0;
+    for (i = 1; i < state->pgc->program_map[state->pgN-1]; i++)
+      cell_event->pg_start +=
+        dvdnav_convert_time(&state->pgc->cell_playback[i - 1].playback_time);
+
+    this->position_current.cell         = this->position_next.cell;
+    this->position_current.cell_restart = this->position_next.cell_restart;
+    this->position_current.cell_start   = this->position_next.cell_start;
+    this->position_current.block        = this->position_next.block;
+    
+    /* vobu info is used for mid cell resumes */
+    this->vobu.vobu_start               = this->position_next.cell_start + this->position_next.block;
+    this->vobu.vobu_next                = 0;
+    /* Make blockN == vobu_length to do expected_nav */
+    this->vobu.vobu_length = 0;
+    this->vobu.blockN      = 0;
+    
+    /* update the spu palette at least on PGC changes */
+    this->spu_clut_changed = 1;
+    this->position_current.spu_channel = -1; /* Force an update */
+    this->position_current.audio_channel = -1; /* Force an update */
+
+    pthread_mutex_unlock(&this->vm_lock); 
+    return DVDNAV_STATUS_OK;
+  }
+ 
+  /* has the CLUT changed? */
+  if(this->spu_clut_changed) {
+    (*event) = DVDNAV_SPU_CLUT_CHANGE;
+#ifdef LOG_DEBUG
+    fprintf(MSG_OUT, "libdvdnav: SPU_CLUT_CHANGE\n");
+#endif
+    (*len) = 16 * sizeof(uint32_t);
+    memcpy(*buf, &(state->pgc->palette), 16 * sizeof(uint32_t));
+    this->spu_clut_changed = 0;
+    pthread_mutex_unlock(&this->vm_lock); 
+    return DVDNAV_STATUS_OK;
+  }
+
+  /* has the SPU channel changed? */  
+  if(this->position_current.spu_channel != this->position_next.spu_channel) {
+    dvdnav_spu_stream_change_event_t *stream_change = (dvdnav_spu_stream_change_event_t *)*buf;
+
+    (*event) = DVDNAV_SPU_STREAM_CHANGE;
+#ifdef LOG_DEBUG
+    fprintf(MSG_OUT, "libdvdnav: SPU_STREAM_CHANGE\n");
+#endif
+    (*len) = sizeof(dvdnav_spu_stream_change_event_t);
+    stream_change->physical_wide      = vm_get_subp_active_stream(this->vm, 0);
+    stream_change->physical_letterbox = vm_get_subp_active_stream(this->vm, 1);
+    stream_change->physical_pan_scan  = vm_get_subp_active_stream(this->vm, 2);
+    this->position_current.spu_channel = this->position_next.spu_channel;
+#ifdef LOG_DEBUG
+    fprintf(MSG_OUT, "libdvdnav: SPU_STREAM_CHANGE stream_id_wide=%d\n",stream_change->physical_wide);
+    fprintf(MSG_OUT, "libdvdnav: SPU_STREAM_CHANGE stream_id_letterbox=%d\n",stream_change->physical_letterbox);
+    fprintf(MSG_OUT, "libdvdnav: SPU_STREAM_CHANGE stream_id_pan_scan=%d\n",stream_change->physical_pan_scan);
+    fprintf(MSG_OUT, "libdvdnav: SPU_STREAM_CHANGE returning DVDNAV_STATUS_OK\n");
+#endif
+    pthread_mutex_unlock(&this->vm_lock); 
+    return DVDNAV_STATUS_OK;
+  }
+
+  /* has the audio channel changed? */  
+  if(this->position_current.audio_channel != this->position_next.audio_channel) {
+    dvdnav_audio_stream_change_event_t *stream_change = (dvdnav_audio_stream_change_event_t *)*buf;
+    
+    (*event) = DVDNAV_AUDIO_STREAM_CHANGE;
+#ifdef LOG_DEBUG
+    fprintf(MSG_OUT, "libdvdnav: AUDIO_STREAM_CHANGE\n");
+#endif
+    (*len) = sizeof(dvdnav_audio_stream_change_event_t);
+    stream_change->physical = vm_get_audio_active_stream( this->vm );
+    this->position_current.audio_channel = this->position_next.audio_channel;
+#ifdef LOG_DEBUG
+    fprintf(MSG_OUT, "libdvdnav: AUDIO_STREAM_CHANGE stream_id=%d returning DVDNAV_STATUS_OK\n",stream_change->physical);
+#endif
+    pthread_mutex_unlock(&this->vm_lock); 
+    return DVDNAV_STATUS_OK;
+  }
+     
+  /* Check the STILLFRAME flag */
+  if(this->position_current.still != 0) {
+    dvdnav_still_event_t *still_event = (dvdnav_still_event_t *)*buf;
+
+    (*event) = DVDNAV_STILL_FRAME;
+#ifdef LOG_DEBUG
+    fprintf(MSG_OUT, "libdvdnav: STILL_FRAME\n");
+#endif
+    (*len) = sizeof(dvdnav_still_event_t);
+    still_event->length = this->position_current.still;
+    pthread_mutex_unlock(&this->vm_lock); 
+    return DVDNAV_STATUS_OK;
+  }
+
+  /* Have we reached the end of a VOBU? */
+  if (this->vobu.blockN >= this->vobu.vobu_length) {
+
+    /* Have we reached the end of a cell? */
+    if(this->vobu.vobu_next == SRI_END_OF_CELL) {
+      /* End of Cell from NAV DSI info */
+#ifdef LOG_DEBUG
+      fprintf(MSG_OUT, "libdvdnav: Still set to %x\n", this->position_next.still);
+#endif
+      this->position_current.still = this->position_next.still;
+
+      /* we are about to leave a cell, so a lot of state changes could occur;
+       * under certain conditions, the application should get in sync with us before this,
+       * otherwise it might show stills or menus too shortly */
+      if ((this->position_current.still || this->pci.hli.hl_gi.hli_ss) && !this->sync_wait_skip) {
+        this->sync_wait = 1;
+      } else {
+	if( this->position_current.still == 0 || this->skip_still ) {
+	  /* no active cell still -> get us to the next cell */
+	  vm_get_next_cell(this->vm);
+	  this->position_current.still = 0; /* still gets activated at end of cell */
+	  this->skip_still = 0;
+	  this->sync_wait_skip = 0;
+	}
+      }
+      /* handle related state changes in next iteration */
+      (*event) = DVDNAV_NOP;
+      (*len) = 0;
+      pthread_mutex_unlock(&this->vm_lock); 
+      return DVDNAV_STATUS_OK;
+    }
+
+    /* Perform remapping jump if necessary (this is always a 
+     * VOBU boundary). */
+    if (this->vm->map) {
+      this->vobu.vobu_next = remap_block( this->vm->map,
+        this->vm->state.domain, this->vm->state.TTN_REG,
+        this->vm->state.pgN,
+        this->vobu.vobu_start, this->vobu.vobu_next);
+    }
+
+    /* at the start of the next VOBU -> expecting NAV packet */
+    result = dvdnav_read_cache_block(this->cache, this->vobu.vobu_start + this->vobu.vobu_next, 1, buf);
+
+    if(result <= 0) {
+      printerr("Error reading NAV packet.");
+      pthread_mutex_unlock(&this->vm_lock); 
+      return DVDNAV_STATUS_ERR;
+    }
+    /* Decode nav into pci and dsi. Then get next VOBU info. */
+    if(!dvdnav_decode_packet(this, *buf, &this->dsi, &this->pci)) {
+      printerr("Expected NAV packet but none found.");
+      pthread_mutex_unlock(&this->vm_lock); 
+      return DVDNAV_STATUS_ERR;
+    }
+    /* We need to update the vm state->blockN with which VOBU we are in.
+     * This is so RSM resumes to the VOBU level and not just the CELL level.
+     */
+    this->vm->state.blockN = this->vobu.vobu_start - this->position_current.cell_start;
+
+    dvdnav_get_vobu(this, &this->dsi, &this->pci, &this->vobu); 
+    this->vobu.blockN = 0;
+    /* Give the cache a hint about the size of next VOBU.
+     * This improves pre-caching, because the VOBU will almost certainly be read entirely.
+     */
+    dvdnav_pre_cache_blocks(this->cache, this->vobu.vobu_start+1, this->vobu.vobu_length+1);
+    
+    /* release NAV menu filter, when we reach the same NAV packet again */
+    if (this->last_cmd_nav_lbn == this->pci.pci_gi.nv_pck_lbn)
+      this->last_cmd_nav_lbn = SRI_END_OF_CELL;
+    
+    /* Successfully got a NAV packet */
+    (*event) = DVDNAV_NAV_PACKET;
+#ifdef LOG_DEBUG
+    fprintf(MSG_OUT, "libdvdnav: NAV_PACKET\n");
+#endif
+    (*len) = 2048; 
+    pthread_mutex_unlock(&this->vm_lock); 
+    return DVDNAV_STATUS_OK;
+  }
+  
+  /* If we've got here, it must just be a normal block. */
+  if(!this->file) {
+    printerr("Attempting to read without opening file.");
+    pthread_mutex_unlock(&this->vm_lock); 
+    return DVDNAV_STATUS_ERR;
+  }
+
+  this->vobu.blockN++;
+  result = dvdnav_read_cache_block(this->cache, this->vobu.vobu_start + this->vobu.blockN, 1, buf);
+  if(result <= 0) {
+    printerr("Error reading from DVD.");
+    pthread_mutex_unlock(&this->vm_lock); 
+    return DVDNAV_STATUS_ERR;
+  }
+  (*event) = DVDNAV_BLOCK_OK;
+  (*len) = 2048;
+
+  pthread_mutex_unlock(&this->vm_lock); 
+  return DVDNAV_STATUS_OK;
+}
+
+dvdnav_status_t dvdnav_get_title_string(dvdnav_t *this, const char **title_str) {
+  
+  if(!this || !title_str) {
+    printerr("Passed a NULL pointer.");
+    return DVDNAV_STATUS_ERR;
+  }
+
+  (*title_str) = this->vm->dvd_name;
+  return DVDNAV_STATUS_OK;
+}
+
+uint8_t dvdnav_get_video_aspect(dvdnav_t *this) {
+  uint8_t         retval;
+  
+  if(!this) {
+    printerr("Passed a NULL pointer.");
+    return -1;
+  }
+  if(!this->started) {
+    printerr("Virtual DVD machine not started.");
+    return -1;
+  }
+
+  pthread_mutex_lock(&this->vm_lock);
+  retval = (uint8_t)vm_get_video_aspect(this->vm);
+  pthread_mutex_unlock(&this->vm_lock);
+  
+  return retval;
+}
+
+uint8_t dvdnav_get_video_scale_permission(dvdnav_t *this) {
+  uint8_t         retval;
+  
+  if(!this) {
+    printerr("Passed a NULL pointer.");
+    return -1;
+  }
+  if(!this->started) {
+    printerr("Virtual DVD machine not started.");
+    return -1;
+  }
+  
+  pthread_mutex_lock(&this->vm_lock);
+  retval = (uint8_t)vm_get_video_scale_permission(this->vm);
+  pthread_mutex_unlock(&this->vm_lock);
+  
+  return retval;
+}
+
+uint16_t dvdnav_audio_stream_to_lang(dvdnav_t *this, uint8_t stream) {
+  audio_attr_t  attr;
+  
+  if(!this) {
+    printerr("Passed a NULL pointer.");
+    return -1;
+  }
+  if(!this->started) {
+    printerr("Virtual DVD machine not started.");
+    return -1;
+  }
+  
+  pthread_mutex_lock(&this->vm_lock); 
+  attr = vm_get_audio_attr(this->vm, stream);
+  pthread_mutex_unlock(&this->vm_lock); 
+  
+  if(attr.lang_type != 1)
+    return 0xffff;
+  
+  return attr.lang_code;
+}
+
+uint16_t dvdnav_spu_stream_to_lang(dvdnav_t *this, uint8_t stream) {
+  subp_attr_t  attr;
+  
+  if(!this) {
+    printerr("Passed a NULL pointer.");
+    return -1;
+  }
+  if(!this->started) {
+    printerr("Virtual DVD machine not started.");
+    return -1;
+  }
+  
+  pthread_mutex_lock(&this->vm_lock); 
+  attr = vm_get_subp_attr(this->vm, stream);
+  pthread_mutex_unlock(&this->vm_lock); 
+  
+  if(attr.type != 1)
+    return 0xffff;
+  
+  return attr.lang_code;
+}
+
+int8_t dvdnav_get_audio_logical_stream(dvdnav_t *this, uint8_t audio_num) {
+  int8_t       retval;
+  
+  if(!this) {
+    printerr("Passed a NULL pointer.");
+    return -1;
+  }
+  if(!this->started) {
+    printerr("Virtual DVD machine not started.");
+    return -1;
+  }
+  
+  pthread_mutex_lock(&this->vm_lock);
+  if (!this->vm->state.pgc) {
+    printerr("No current PGC.");
+    pthread_mutex_unlock(&this->vm_lock); 
+    return -1;
+  }
+  retval = vm_get_audio_stream(this->vm, audio_num);
+  pthread_mutex_unlock(&this->vm_lock); 
+
+  return retval;
+}
+
+int8_t dvdnav_get_spu_logical_stream(dvdnav_t *this, uint8_t subp_num) {
+  int8_t       retval;
+
+  if(!this) {
+    printerr("Passed a NULL pointer.");
+    return -1;
+  }
+  if(!this->started) {
+    printerr("Virtual DVD machine not started.");
+    return -1;
+  }
+
+  pthread_mutex_lock(&this->vm_lock);
+  if (!this->vm->state.pgc) {
+    printerr("No current PGC.");
+    pthread_mutex_unlock(&this->vm_lock); 
+    return -1;
+  }
+  retval = vm_get_subp_stream(this->vm, subp_num, 0);
+  pthread_mutex_unlock(&this->vm_lock);
+
+  return retval;
+}
+
+int8_t dvdnav_get_active_audio_stream(dvdnav_t *this) {
+  int8_t        retval;
+
+  if(!this) {
+    printerr("Passed a NULL pointer.");
+    return -1;
+  }
+  if(!this->started) {
+    printerr("Virtual DVD machine not started.");
+    return -1;
+  }
+  
+  pthread_mutex_lock(&this->vm_lock); 
+  if (!this->vm->state.pgc) {
+    printerr("No current PGC.");
+    pthread_mutex_unlock(&this->vm_lock); 
+    return -1;
+  }
+  retval = vm_get_audio_active_stream(this->vm);
+  pthread_mutex_unlock(&this->vm_lock); 
+  
+  return retval;
+}
+
+int8_t dvdnav_get_active_spu_stream(dvdnav_t *this) {
+  int8_t        retval;
+
+  if(!this) {
+    printerr("Passed a NULL pointer.");
+    return -1;
+  }
+  if(!this->started) {
+    printerr("Virtual DVD machine not started.");
+    return -1;
+  }
+  
+  pthread_mutex_lock(&this->vm_lock); 
+  if (!this->vm->state.pgc) {
+    printerr("No current PGC.");
+    pthread_mutex_unlock(&this->vm_lock); 
+    return -1;
+  }
+  retval = vm_get_subp_active_stream(this->vm, 0);
+  pthread_mutex_unlock(&this->vm_lock); 
+  
+  return retval;
+}
+
+static int8_t dvdnav_is_domain(dvdnav_t *this, domain_t domain) {
+  int8_t        retval;
+  
+  if(!this) {
+    printerr("Passed a NULL pointer.");
+    return -1;
+  }
+  if(!this->started) {
+    printerr("Virtual DVD machine not started.");
+    return -1;
+  }
+  
+  pthread_mutex_lock(&this->vm_lock);
+  retval = (this->vm->state.domain == domain);
+  pthread_mutex_unlock(&this->vm_lock);
+  
+  return retval;
+}
+
+/* First Play domain. (Menu) */
+int8_t dvdnav_is_domain_fp(dvdnav_t *this) {
+  return dvdnav_is_domain(this, FP_DOMAIN);
+}
+/* Video management Menu domain. (Menu) */
+int8_t dvdnav_is_domain_vmgm(dvdnav_t *this) {
+  return dvdnav_is_domain(this, VMGM_DOMAIN);
+}
+/* Video Title Menu domain (Menu) */
+int8_t dvdnav_is_domain_vtsm(dvdnav_t *this) {
+  return dvdnav_is_domain(this, VTSM_DOMAIN);
+}
+/* Video Title domain (playing movie). */
+int8_t dvdnav_is_domain_vts(dvdnav_t *this) { 
+  return dvdnav_is_domain(this, VTS_DOMAIN);
+}
+
+/* Generally delegate angle information handling to VM */
+dvdnav_status_t dvdnav_angle_change(dvdnav_t *this, int32_t angle) {
+  int32_t num, current;
+  
+  if(!this) {
+    printerr("Passed a NULL pointer.");
+    return DVDNAV_STATUS_ERR;
+  }
+
+  pthread_mutex_lock(&this->vm_lock);
+  vm_get_angle_info(this->vm, &current, &num);
+  /* Set angle SPRM if valid */
+  if((angle > 0) && (angle <= num)) {
+    this->vm->state.AGL_REG = angle;
+  } else {
+    printerr("Passed an invalid angle number.");
+    pthread_mutex_unlock(&this->vm_lock);
+    return DVDNAV_STATUS_ERR;
+  }
+  pthread_mutex_unlock(&this->vm_lock);
+
+  return DVDNAV_STATUS_OK;
+}
+
+dvdnav_status_t dvdnav_get_angle_info(dvdnav_t *this, int32_t *current_angle,
+				      int32_t *number_of_angles) {
+  if(!this || !current_angle || !number_of_angles) {
+    printerr("Passed a NULL pointer.");
+    return DVDNAV_STATUS_ERR;
+  }
+
+  pthread_mutex_lock(&this->vm_lock);
+  vm_get_angle_info(this->vm, current_angle, number_of_angles);
+  pthread_mutex_unlock(&this->vm_lock);
+
+  return DVDNAV_STATUS_OK;
+}
+
+pci_t* dvdnav_get_current_nav_pci(dvdnav_t *this) {
+  if(!this) return 0;
+  return &this->pci;
+}
+
+dsi_t* dvdnav_get_current_nav_dsi(dvdnav_t *this) {
+  if(!this) return 0;
+  return &this->dsi;
+}
+
+uint32_t dvdnav_get_next_still_flag(dvdnav_t *this) {
+  if(!this) return -1;
+  return this->position_next.still;
+}
+