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libdvdnav-master.tar.gz/src/vm/vmget.c Changed

libdvdnav-master.tar.gz/src/vm/vmget.c.orig Added

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+/*
+ * Copyright (C) 2000, 2001 Håkan 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 libdvdnav; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <assert.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <dvdread/nav_types.h>
+#include <dvdread/ifo_types.h>
+#include <dvdread/ifo_read.h>
+#include "dvdnav/dvdnav.h"
+
+#include "decoder.h"
+#include "vm.h"
+#include "getset.h"
+#include "dvdnav_internal.h"
+
+/* 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);
+  if(pgcit==NULL) return 0;
+  *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 != DVD_DOMAIN_VTSTitle)
+    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 != DVD_DOMAIN_VTSTitle && 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 != DVD_DOMAIN_VTSTitle)
+    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 != DVD_DOMAIN_VTSTitle && 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 == DVD_DOMAIN_VTSTitle && !((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 == DVD_DOMAIN_VTSTitle) {
+    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 DVD_DOMAIN_VTSTitle:
+    *num_avail = vm->vtsi->vtsi_mat->nr_of_vts_audio_streams;
+    *current = (vm->state).AST_REG;
+    break;
+  case DVD_DOMAIN_VTSMenu:
+    *num_avail = vm->vtsi->vtsi_mat->nr_of_vtsm_audio_streams; /*  1 */
+    *current = 1;
+    break;
+  case DVD_DOMAIN_VMGM:
+  case DVD_DOMAIN_FirstPlay:
+    *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 DVD_DOMAIN_VTSTitle:
+    *num_avail = vm->vtsi->vtsi_mat->nr_of_vts_subp_streams;
+    *current = (vm->state).SPST_REG;
+    break;
+  case DVD_DOMAIN_VTSMenu:
+    *num_avail = vm->vtsi->vtsi_mat->nr_of_vtsm_subp_streams; /*  1 */
+    *current = 0x41;
+    break;
+  case DVD_DOMAIN_VMGM:
+  case DVD_DOMAIN_FirstPlay:
+    *num_avail = vm->vmgi->vmgi_mat->nr_of_vmgm_subp_streams; /*  1 */
+    *current = 0x41;
+    break;
+  }
+}
+#endif
+
+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;
+  }
+}
+
+int vm_get_video_aspect(vm_t *vm) {
+  int aspect = vm_get_video_attr(vm).display_aspect_ratio;
+
+  if(aspect != 0 && aspect != 3) {
+    fprintf(MSG_OUT, "libdvdnav: display aspect ratio is unexpected: %d!\n", aspect);
+    return -1;
+  }
+
+  (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 DVD_DOMAIN_VTSTitle:
+    return vm->vtsi->vtsi_mat->vts_video_attr;
+  case DVD_DOMAIN_VTSMenu:
+    return vm->vtsi->vtsi_mat->vtsm_video_attr;
+  case DVD_DOMAIN_VMGM:
+  case DVD_DOMAIN_FirstPlay:
+    return vm->vmgi->vmgi_mat->vmgm_video_attr;
+  default:
+    assert(0);
+  }
+}
+
+audio_attr_t vm_get_audio_attr(vm_t *vm, int streamN) {
+  switch ((vm->state).domain) {
+  case DVD_DOMAIN_VTSTitle:
+    return vm->vtsi->vtsi_mat->vts_audio_attr[streamN];
+  case DVD_DOMAIN_VTSMenu:
+    return vm->vtsi->vtsi_mat->vtsm_audio_attr;
+  case DVD_DOMAIN_VMGM:
+  case DVD_DOMAIN_FirstPlay:
+    return vm->vmgi->vmgi_mat->vmgm_audio_attr;
+  default:
+    assert(0);
+  }
+}
+
+subp_attr_t vm_get_subp_attr(vm_t *vm, int streamN) {
+  switch ((vm->state).domain) {
+  case DVD_DOMAIN_VTSTitle:
+    return vm->vtsi->vtsi_mat->vts_subp_attr[streamN];
+  case DVD_DOMAIN_VTSMenu:
+    return vm->vtsi->vtsi_mat->vtsm_subp_attr;
+  case DVD_DOMAIN_VMGM:
+  case DVD_DOMAIN_FirstPlay:
+    return vm->vmgi->vmgi_mat->vmgm_subp_attr;
+  default:
+    assert(0);
+  }
+}

Changes of Revision 99