1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/menus.c	Thu Nov 12 23:26:25 2009 -0800
     1.3 @@ -0,0 +1,281 @@
     1.4 +/*
     1.5 + * Copyright (C) 2003 by the libdvdnav project
     1.6 + *
     1.7 + * This file is part of libdvdnav, a DVD navigation library.
     1.8 + *
     1.9 + * libdvdnav is free software; you can redistribute it and/or modify
    1.10 + * it under the terms of the GNU General Public License as published by
    1.11 + * the Free Software Foundation; either version 2 of the License, or
    1.12 + * (at your option) any later version.
    1.13 + *
    1.14 + * libdvdnav is distributed in the hope that it will be useful,
    1.15 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.16 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.17 + * GNU General Public License for more details.
    1.18 + *
    1.19 + * You should have received a copy of the GNU General Public License
    1.20 + * along with this program; if not, write to the Free Software
    1.21 + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
    1.22 + *
    1.23 + * $Id: menus.c 1135 2008-09-06 21:55:51Z rathann $
    1.24 + *
    1.25 + */
    1.26 +
    1.27 +#include <stdio.h>
    1.28 +#include <unistd.h>
    1.29 +#include <inttypes.h>
    1.30 +#include <sys/types.h>
    1.31 +#include <sys/stat.h>
    1.32 +#include <fcntl.h>
    1.33 +#include "dvd_types.h"
    1.34 +#include <dvdread/dvd_reader.h>
    1.35 +#include <dvdread/nav_types.h>
    1.36 +#include <dvdread/ifo_types.h> /* For vm_cmd_t */
    1.37 +#include "dvdnav.h"
    1.38 +#include "dvdnav_events.h"
    1.39 +
    1.40 +/* shall we use libdvdnav's read ahead cache? */
    1.41 +#define DVD_READ_CACHE 1
    1.42 +
    1.43 +/* which is the default language for menus/audio/subpictures? */
    1.44 +#define DVD_LANGUAGE "en"
    1.45 +
    1.46 +#ifdef WIN32
    1.47 +#define S_IRWXG 0
    1.48 +#endif
    1.49 +
    1.50 +int main(int argc, char **argv) {
    1.51 +  dvdnav_t *dvdnav;
    1.52 +  uint8_t mem[DVD_VIDEO_LB_LEN];
    1.53 +  int finished = 0;
    1.54 +  int output_fd = 0;
    1.55 +  int dump = 0, tt_dump = 0;
    1.56 +
    1.57 +  /* open dvdnav handle */
    1.58 +  printf("Opening DVD...\n");
    1.59 +  if (dvdnav_open(&dvdnav, "/dev/dvd") != DVDNAV_STATUS_OK) {
    1.60 +    printf("Error on dvdnav_open\n");
    1.61 +    return 1;
    1.62 +  }
    1.63 +
    1.64 +  /* set read ahead cache usage */
    1.65 +  if (dvdnav_set_readahead_flag(dvdnav, DVD_READ_CACHE) != DVDNAV_STATUS_OK) {
    1.66 +    printf("Error on dvdnav_set_readahead_flag: %s\n", dvdnav_err_to_string(dvdnav));
    1.67 +    return 2;
    1.68 +  }
    1.69 +
    1.70 +  /* set the language */
    1.71 +  if (dvdnav_menu_language_select(dvdnav, DVD_LANGUAGE) != DVDNAV_STATUS_OK ||
    1.72 +      dvdnav_audio_language_select(dvdnav, DVD_LANGUAGE) != DVDNAV_STATUS_OK ||
    1.73 +      dvdnav_spu_language_select(dvdnav, DVD_LANGUAGE) != DVDNAV_STATUS_OK) {
    1.74 +    printf("Error on setting languages: %s\n", dvdnav_err_to_string(dvdnav));
    1.75 +    return 2;
    1.76 +  }
    1.77 +
    1.78 +  /* set the PGC positioning flag to have position information relatively to the
    1.79 +   * whole feature instead of just relatively to the current chapter */
    1.80 +  if (dvdnav_set_PGC_positioning_flag(dvdnav, 1) != DVDNAV_STATUS_OK) {
    1.81 +    printf("Error on dvdnav_set_PGC_positioning_flag: %s\n", dvdnav_err_to_string(dvdnav));
    1.82 +    return 2;
    1.83 +  }
    1.84 +
    1.85 +
    1.86 +  /* the read loop which regularly calls dvdnav_get_next_block
    1.87 +   * and handles the returned events */
    1.88 +  printf("Reading...\n");
    1.89 +  while (!finished) {
    1.90 +    int result, event, len;
    1.91 +    uint8_t *buf = mem;
    1.92 +
    1.93 +    /* the main reading function */
    1.94 +#if DVD_READ_CACHE
    1.95 +    result = dvdnav_get_next_cache_block(dvdnav, &buf, &event, &len);
    1.96 +#else
    1.97 +    result = dvdnav_get_next_block(dvdnav, buf, &event, &len);
    1.98 +#endif
    1.99 +
   1.100 +    if (result == DVDNAV_STATUS_ERR) {
   1.101 +      printf("Error getting next block: %s\n", dvdnav_err_to_string(dvdnav));
   1.102 +      return 3;
   1.103 +    }
   1.104 +
   1.105 +    switch (event) {
   1.106 +    case DVDNAV_BLOCK_OK:
   1.107 +      /* We have received a regular block of the currently playing MPEG stream.
   1.108 +       * A real player application would now pass this block through demuxing
   1.109 +       * and decoding. We simply write it to disc here. */
   1.110 +
   1.111 +      if (!output_fd) {
   1.112 +	printf("Opening output...\n");
   1.113 +	output_fd = open("libdvdnav.mpg", O_CREAT | O_WRONLY, S_IRWXU | S_IRWXG);
   1.114 +	if (output_fd == -1) {
   1.115 +	  printf("Error opening output\n");
   1.116 +	  return 4;
   1.117 +	}
   1.118 +      }
   1.119 +
   1.120 +      if (dump || tt_dump)
   1.121 +	write(output_fd, buf, len);
   1.122 +
   1.123 +      break;
   1.124 +    case DVDNAV_NOP:
   1.125 +      /* Nothing to do here. */
   1.126 +      break;
   1.127 +    case DVDNAV_STILL_FRAME:
   1.128 +      /* We have reached a still frame. A real player application would wait
   1.129 +       * the amount of time specified by the still's length while still handling
   1.130 +       * user input to make menus and other interactive stills work.
   1.131 +       * A length of 0xff means an indefinite still which has to be skipped
   1.132 +       * indirectly by some user interaction. */
   1.133 +      {
   1.134 +	dvdnav_still_event_t *still_event = (dvdnav_still_event_t *)buf;
   1.135 +	if (still_event->length < 0xff)
   1.136 +	  printf("Skipping %d seconds of still frame\n", still_event->length);
   1.137 +	else
   1.138 +	  printf("Skipping indefinite length still frame\n");
   1.139 +	dvdnav_still_skip(dvdnav);
   1.140 +      }
   1.141 +      break;
   1.142 +    case DVDNAV_WAIT:
   1.143 +      /* We have reached a point in DVD playback, where timing is critical.
   1.144 +       * Player application with internal fifos can introduce state
   1.145 +       * inconsistencies, because libdvdnav is always the fifo's length
   1.146 +       * ahead in the stream compared to what the application sees.
   1.147 +       * Such applications should wait until their fifos are empty
   1.148 +       * when they receive this type of event. */
   1.149 +      printf("Skipping wait condition\n");
   1.150 +      dvdnav_wait_skip(dvdnav);
   1.151 +      break;
   1.152 +    case DVDNAV_SPU_CLUT_CHANGE:
   1.153 +      /* Player applications should pass the new colour lookup table to their
   1.154 +       * SPU decoder */
   1.155 +      break;
   1.156 +    case DVDNAV_SPU_STREAM_CHANGE:
   1.157 +      /* Player applications should inform their SPU decoder to switch channels */
   1.158 +      break;
   1.159 +    case DVDNAV_AUDIO_STREAM_CHANGE:
   1.160 +      /* Player applications should inform their audio decoder to switch channels */
   1.161 +      break;
   1.162 +    case DVDNAV_HIGHLIGHT:
   1.163 +      /* Player applications should inform their overlay engine to highlight the
   1.164 +       * given button */
   1.165 +      {
   1.166 +	dvdnav_highlight_event_t *highlight_event = (dvdnav_highlight_event_t *)buf;
   1.167 +	printf("Selected button %d\n", highlight_event->buttonN);
   1.168 +      }
   1.169 +      break;
   1.170 +    case DVDNAV_VTS_CHANGE:
   1.171 +      /* Some status information like video aspect and video scale permissions do
   1.172 +       * not change inside a VTS. Therefore this event can be used to query such
   1.173 +       * information only when necessary and update the decoding/displaying
   1.174 +       * accordingly. */
   1.175 +      break;
   1.176 +    case DVDNAV_CELL_CHANGE:
   1.177 +      /* Some status information like the current Title and Part numbers do not
   1.178 +       * change inside a cell. Therefore this event can be used to query such
   1.179 +       * information only when necessary and update the decoding/displaying
   1.180 +       * accordingly. */
   1.181 +      {
   1.182 +	int32_t tt = 0, ptt = 0;
   1.183 +	uint32_t pos, len;
   1.184 +	char input = '\0';
   1.185 +
   1.186 +	dvdnav_current_title_info(dvdnav, &tt, &ptt);
   1.187 +	dvdnav_get_position(dvdnav, &pos, &len);
   1.188 +	printf("Cell change: Title %d, Chapter %d\n", tt, ptt);
   1.189 +	printf("At position %.0f%% inside the feature\n", 100 * (double)pos / (double)len);
   1.190 +
   1.191 +	dump = 0;
   1.192 +	if (tt_dump && tt != tt_dump)
   1.193 +	  tt_dump = 0;
   1.194 +
   1.195 +	if (!dump && !tt_dump) {
   1.196 +	  fflush(stdin);
   1.197 +	  while ((input != 'a') && (input != 's') && (input != 'q') && (input != 't')) {
   1.198 +	    printf("(a)ppend cell to output\n(s)kip cell\nappend until end of (t)itle\n(q)uit\n");
   1.199 +	    scanf("%c", &input);
   1.200 +	  }
   1.201 +
   1.202 +	  switch (input) {
   1.203 +	  case 'a':
   1.204 +	    dump = 1;
   1.205 +	    break;
   1.206 +	  case 't':
   1.207 +	    tt_dump = tt;
   1.208 +	    break;
   1.209 +	  case 'q':
   1.210 +	    finished = 1;
   1.211 +	  }
   1.212 +	}
   1.213 +      }
   1.214 +      break;
   1.215 +    case DVDNAV_NAV_PACKET:
   1.216 +      /* A NAV packet provides PTS discontinuity information, angle linking information and
   1.217 +       * button definitions for DVD menus. Angles are handled completely inside libdvdnav.
   1.218 +       * For the menus to work, the NAV packet information has to be passed to the overlay
   1.219 +       * engine of the player so that it knows the dimensions of the button areas. */
   1.220 +      {
   1.221 +	pci_t *pci;
   1.222 +
   1.223 +	/* Applications with fifos should not use these functions to retrieve NAV packets,
   1.224 +	 * they should implement their own NAV handling, because the packet you get from these
   1.225 +	 * functions will already be ahead in the stream which can cause state inconsistencies.
   1.226 +	 * Applications with fifos should therefore pass the NAV packet through the fifo
   1.227 +	 * and decoding pipeline just like any other data. */
   1.228 +	pci = dvdnav_get_current_nav_pci(dvdnav);
   1.229 +	dvdnav_get_current_nav_dsi(dvdnav);
   1.230 +
   1.231 +	if(pci->hli.hl_gi.btn_ns > 0) {
   1.232 +	  int button;
   1.233 +
   1.234 +	  printf("Found %i DVD menu buttons...\n", pci->hli.hl_gi.btn_ns);
   1.235 +
   1.236 +	  for (button = 0; button < pci->hli.hl_gi.btn_ns; button++) {
   1.237 +	    btni_t *btni = &(pci->hli.btnit[button]);
   1.238 +	    printf("Button %i top-left @ (%i,%i), bottom-right @ (%i,%i)\n",
   1.239 +		    button + 1, btni->x_start, btni->y_start,
   1.240 +		    btni->x_end, btni->y_end);
   1.241 +	  }
   1.242 +
   1.243 +	  button = 0;
   1.244 +	  while ((button <= 0) || (button > pci->hli.hl_gi.btn_ns)) {
   1.245 +	    printf("Which button (1 to %i): ", pci->hli.hl_gi.btn_ns);
   1.246 +	    scanf("%i", &button);
   1.247 +	  }
   1.248 +
   1.249 +	  printf("Selecting button %i...\n", button);
   1.250 +	  /* This is the point where applications with fifos have to hand in a NAV packet
   1.251 +	   * which has traveled through the fifos. See the notes above. */
   1.252 +	  dvdnav_button_select_and_activate(dvdnav, pci, button);
   1.253 +	}
   1.254 +      }
   1.255 +      break;
   1.256 +    case DVDNAV_HOP_CHANNEL:
   1.257 +      /* This event is issued whenever a non-seamless operation has been executed.
   1.258 +       * Applications with fifos should drop the fifos content to speed up responsiveness. */
   1.259 +      break;
   1.260 +    case DVDNAV_STOP:
   1.261 +      /* Playback should end here. */
   1.262 +      {
   1.263 +	finished = 1;
   1.264 +      }
   1.265 +      break;
   1.266 +    default:
   1.267 +      printf("Unknown event (%i)\n", event);
   1.268 +      finished = 1;
   1.269 +      break;
   1.270 +    }
   1.271 +#if DVD_READ_CACHE
   1.272 +    dvdnav_free_cache_block(dvdnav, buf);
   1.273 +#endif
   1.274 +  }
   1.275 +
   1.276 +  /* destroy dvdnav handle */
   1.277 +  if (dvdnav_close(dvdnav) != DVDNAV_STATUS_OK) {
   1.278 +    printf("Error on dvdnav_close: %s\n", dvdnav_err_to_string(dvdnav));
   1.279 +    return 5;
   1.280 +  }
   1.281 +  close(output_fd);
   1.282 +
   1.283 +  return 0;
   1.284 +}