paulo@0: /*
paulo@0:  * Copyright (C) 2003 by the libdvdnav project
paulo@0:  *
paulo@0:  * This file is part of libdvdnav, a DVD navigation library.
paulo@0:  *
paulo@0:  * libdvdnav is free software; you can redistribute it and/or modify
paulo@0:  * it under the terms of the GNU General Public License as published by
paulo@0:  * the Free Software Foundation; either version 2 of the License, or
paulo@0:  * (at your option) any later version.
paulo@0:  *
paulo@0:  * libdvdnav is distributed in the hope that it will be useful,
paulo@0:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
paulo@0:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
paulo@0:  * GNU General Public License for more details.
paulo@0:  *
paulo@0:  * You should have received a copy of the GNU General Public License
paulo@0:  * along with this program; if not, write to the Free Software
paulo@0:  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
paulo@0:  *
paulo@0:  * $Id: menus.c 1135 2008-09-06 21:55:51Z rathann $
paulo@0:  *
paulo@0:  */
paulo@0: 
paulo@0: #include <stdio.h>
paulo@0: #include <unistd.h>
paulo@0: #include <inttypes.h>
paulo@0: #include <sys/types.h>
paulo@0: #include <sys/stat.h>
paulo@0: #include <fcntl.h>
paulo@0: #include "dvd_types.h"
paulo@0: #include <dvdread/dvd_reader.h>
paulo@0: #include <dvdread/nav_types.h>
paulo@0: #include <dvdread/ifo_types.h> /* For vm_cmd_t */
paulo@0: #include "dvdnav.h"
paulo@0: #include "dvdnav_events.h"
paulo@0: 
paulo@0: /* shall we use libdvdnav's read ahead cache? */
paulo@0: #define DVD_READ_CACHE 1
paulo@0: 
paulo@0: /* which is the default language for menus/audio/subpictures? */
paulo@0: #define DVD_LANGUAGE "en"
paulo@0: 
paulo@0: #ifdef WIN32
paulo@0: #define S_IRWXG 0
paulo@0: #endif
paulo@0: 
paulo@0: int main(int argc, char **argv) {
paulo@0:   dvdnav_t *dvdnav;
paulo@0:   uint8_t mem[DVD_VIDEO_LB_LEN];
paulo@0:   int finished = 0;
paulo@0:   int output_fd = 0;
paulo@0:   int dump = 0, tt_dump = 0;
paulo@0: 
paulo@0:   /* open dvdnav handle */
paulo@0:   printf("Opening DVD...\n");
paulo@0:   if (dvdnav_open(&dvdnav, "/dev/dvd") != DVDNAV_STATUS_OK) {
paulo@0:     printf("Error on dvdnav_open\n");
paulo@0:     return 1;
paulo@0:   }
paulo@0: 
paulo@0:   /* set read ahead cache usage */
paulo@0:   if (dvdnav_set_readahead_flag(dvdnav, DVD_READ_CACHE) != DVDNAV_STATUS_OK) {
paulo@0:     printf("Error on dvdnav_set_readahead_flag: %s\n", dvdnav_err_to_string(dvdnav));
paulo@0:     return 2;
paulo@0:   }
paulo@0: 
paulo@0:   /* set the language */
paulo@0:   if (dvdnav_menu_language_select(dvdnav, DVD_LANGUAGE) != DVDNAV_STATUS_OK ||
paulo@0:       dvdnav_audio_language_select(dvdnav, DVD_LANGUAGE) != DVDNAV_STATUS_OK ||
paulo@0:       dvdnav_spu_language_select(dvdnav, DVD_LANGUAGE) != DVDNAV_STATUS_OK) {
paulo@0:     printf("Error on setting languages: %s\n", dvdnav_err_to_string(dvdnav));
paulo@0:     return 2;
paulo@0:   }
paulo@0: 
paulo@0:   /* set the PGC positioning flag to have position information relatively to the
paulo@0:    * whole feature instead of just relatively to the current chapter */
paulo@0:   if (dvdnav_set_PGC_positioning_flag(dvdnav, 1) != DVDNAV_STATUS_OK) {
paulo@0:     printf("Error on dvdnav_set_PGC_positioning_flag: %s\n", dvdnav_err_to_string(dvdnav));
paulo@0:     return 2;
paulo@0:   }
paulo@0: 
paulo@0: 
paulo@0:   /* the read loop which regularly calls dvdnav_get_next_block
paulo@0:    * and handles the returned events */
paulo@0:   printf("Reading...\n");
paulo@0:   while (!finished) {
paulo@0:     int result, event, len;
paulo@0:     uint8_t *buf = mem;
paulo@0: 
paulo@0:     /* the main reading function */
paulo@0: #if DVD_READ_CACHE
paulo@0:     result = dvdnav_get_next_cache_block(dvdnav, &buf, &event, &len);
paulo@0: #else
paulo@0:     result = dvdnav_get_next_block(dvdnav, buf, &event, &len);
paulo@0: #endif
paulo@0: 
paulo@0:     if (result == DVDNAV_STATUS_ERR) {
paulo@0:       printf("Error getting next block: %s\n", dvdnav_err_to_string(dvdnav));
paulo@0:       return 3;
paulo@0:     }
paulo@0: 
paulo@0:     switch (event) {
paulo@0:     case DVDNAV_BLOCK_OK:
paulo@0:       /* We have received a regular block of the currently playing MPEG stream.
paulo@0:        * A real player application would now pass this block through demuxing
paulo@0:        * and decoding. We simply write it to disc here. */
paulo@0: 
paulo@0:       if (!output_fd) {
paulo@0: 	printf("Opening output...\n");
paulo@0: 	output_fd = open("libdvdnav.mpg", O_CREAT | O_WRONLY, S_IRWXU | S_IRWXG);
paulo@0: 	if (output_fd == -1) {
paulo@0: 	  printf("Error opening output\n");
paulo@0: 	  return 4;
paulo@0: 	}
paulo@0:       }
paulo@0: 
paulo@0:       if (dump || tt_dump)
paulo@0: 	write(output_fd, buf, len);
paulo@0: 
paulo@0:       break;
paulo@0:     case DVDNAV_NOP:
paulo@0:       /* Nothing to do here. */
paulo@0:       break;
paulo@0:     case DVDNAV_STILL_FRAME:
paulo@0:       /* We have reached a still frame. A real player application would wait
paulo@0:        * the amount of time specified by the still's length while still handling
paulo@0:        * user input to make menus and other interactive stills work.
paulo@0:        * A length of 0xff means an indefinite still which has to be skipped
paulo@0:        * indirectly by some user interaction. */
paulo@0:       {
paulo@0: 	dvdnav_still_event_t *still_event = (dvdnav_still_event_t *)buf;
paulo@0: 	if (still_event->length < 0xff)
paulo@0: 	  printf("Skipping %d seconds of still frame\n", still_event->length);
paulo@0: 	else
paulo@0: 	  printf("Skipping indefinite length still frame\n");
paulo@0: 	dvdnav_still_skip(dvdnav);
paulo@0:       }
paulo@0:       break;
paulo@0:     case DVDNAV_WAIT:
paulo@0:       /* We have reached a point in DVD playback, where timing is critical.
paulo@0:        * Player application with internal fifos can introduce state
paulo@0:        * inconsistencies, because libdvdnav is always the fifo's length
paulo@0:        * ahead in the stream compared to what the application sees.
paulo@0:        * Such applications should wait until their fifos are empty
paulo@0:        * when they receive this type of event. */
paulo@0:       printf("Skipping wait condition\n");
paulo@0:       dvdnav_wait_skip(dvdnav);
paulo@0:       break;
paulo@0:     case DVDNAV_SPU_CLUT_CHANGE:
paulo@0:       /* Player applications should pass the new colour lookup table to their
paulo@0:        * SPU decoder */
paulo@0:       break;
paulo@0:     case DVDNAV_SPU_STREAM_CHANGE:
paulo@0:       /* Player applications should inform their SPU decoder to switch channels */
paulo@0:       break;
paulo@0:     case DVDNAV_AUDIO_STREAM_CHANGE:
paulo@0:       /* Player applications should inform their audio decoder to switch channels */
paulo@0:       break;
paulo@0:     case DVDNAV_HIGHLIGHT:
paulo@0:       /* Player applications should inform their overlay engine to highlight the
paulo@0:        * given button */
paulo@0:       {
paulo@0: 	dvdnav_highlight_event_t *highlight_event = (dvdnav_highlight_event_t *)buf;
paulo@0: 	printf("Selected button %d\n", highlight_event->buttonN);
paulo@0:       }
paulo@0:       break;
paulo@0:     case DVDNAV_VTS_CHANGE:
paulo@0:       /* Some status information like video aspect and video scale permissions do
paulo@0:        * not change inside a VTS. Therefore this event can be used to query such
paulo@0:        * information only when necessary and update the decoding/displaying
paulo@0:        * accordingly. */
paulo@0:       break;
paulo@0:     case DVDNAV_CELL_CHANGE:
paulo@0:       /* Some status information like the current Title and Part numbers do not
paulo@0:        * change inside a cell. Therefore this event can be used to query such
paulo@0:        * information only when necessary and update the decoding/displaying
paulo@0:        * accordingly. */
paulo@0:       {
paulo@0: 	int32_t tt = 0, ptt = 0;
paulo@0: 	uint32_t pos, len;
paulo@0: 	char input = '\0';
paulo@0: 
paulo@0: 	dvdnav_current_title_info(dvdnav, &tt, &ptt);
paulo@0: 	dvdnav_get_position(dvdnav, &pos, &len);
paulo@0: 	printf("Cell change: Title %d, Chapter %d\n", tt, ptt);
paulo@0: 	printf("At position %.0f%% inside the feature\n", 100 * (double)pos / (double)len);
paulo@0: 
paulo@0: 	dump = 0;
paulo@0: 	if (tt_dump && tt != tt_dump)
paulo@0: 	  tt_dump = 0;
paulo@0: 
paulo@0: 	if (!dump && !tt_dump) {
paulo@0: 	  fflush(stdin);
paulo@0: 	  while ((input != 'a') && (input != 's') && (input != 'q') && (input != 't')) {
paulo@0: 	    printf("(a)ppend cell to output\n(s)kip cell\nappend until end of (t)itle\n(q)uit\n");
paulo@0: 	    scanf("%c", &input);
paulo@0: 	  }
paulo@0: 
paulo@0: 	  switch (input) {
paulo@0: 	  case 'a':
paulo@0: 	    dump = 1;
paulo@0: 	    break;
paulo@0: 	  case 't':
paulo@0: 	    tt_dump = tt;
paulo@0: 	    break;
paulo@0: 	  case 'q':
paulo@0: 	    finished = 1;
paulo@0: 	  }
paulo@0: 	}
paulo@0:       }
paulo@0:       break;
paulo@0:     case DVDNAV_NAV_PACKET:
paulo@0:       /* A NAV packet provides PTS discontinuity information, angle linking information and
paulo@0:        * button definitions for DVD menus. Angles are handled completely inside libdvdnav.
paulo@0:        * For the menus to work, the NAV packet information has to be passed to the overlay
paulo@0:        * engine of the player so that it knows the dimensions of the button areas. */
paulo@0:       {
paulo@0: 	pci_t *pci;
paulo@0: 
paulo@0: 	/* Applications with fifos should not use these functions to retrieve NAV packets,
paulo@0: 	 * they should implement their own NAV handling, because the packet you get from these
paulo@0: 	 * functions will already be ahead in the stream which can cause state inconsistencies.
paulo@0: 	 * Applications with fifos should therefore pass the NAV packet through the fifo
paulo@0: 	 * and decoding pipeline just like any other data. */
paulo@0: 	pci = dvdnav_get_current_nav_pci(dvdnav);
paulo@0: 	dvdnav_get_current_nav_dsi(dvdnav);
paulo@0: 
paulo@0: 	if(pci->hli.hl_gi.btn_ns > 0) {
paulo@0: 	  int button;
paulo@0: 
paulo@0: 	  printf("Found %i DVD menu buttons...\n", pci->hli.hl_gi.btn_ns);
paulo@0: 
paulo@0: 	  for (button = 0; button < pci->hli.hl_gi.btn_ns; button++) {
paulo@0: 	    btni_t *btni = &(pci->hli.btnit[button]);
paulo@0: 	    printf("Button %i top-left @ (%i,%i), bottom-right @ (%i,%i)\n",
paulo@0: 		    button + 1, btni->x_start, btni->y_start,
paulo@0: 		    btni->x_end, btni->y_end);
paulo@0: 	  }
paulo@0: 
paulo@0: 	  button = 0;
paulo@0: 	  while ((button <= 0) || (button > pci->hli.hl_gi.btn_ns)) {
paulo@0: 	    printf("Which button (1 to %i): ", pci->hli.hl_gi.btn_ns);
paulo@0: 	    scanf("%i", &button);
paulo@0: 	  }
paulo@0: 
paulo@0: 	  printf("Selecting button %i...\n", button);
paulo@0: 	  /* This is the point where applications with fifos have to hand in a NAV packet
paulo@0: 	   * which has traveled through the fifos. See the notes above. */
paulo@0: 	  dvdnav_button_select_and_activate(dvdnav, pci, button);
paulo@0: 	}
paulo@0:       }
paulo@0:       break;
paulo@0:     case DVDNAV_HOP_CHANNEL:
paulo@0:       /* This event is issued whenever a non-seamless operation has been executed.
paulo@0:        * Applications with fifos should drop the fifos content to speed up responsiveness. */
paulo@0:       break;
paulo@0:     case DVDNAV_STOP:
paulo@0:       /* Playback should end here. */
paulo@0:       {
paulo@0: 	finished = 1;
paulo@0:       }
paulo@0:       break;
paulo@0:     default:
paulo@0:       printf("Unknown event (%i)\n", event);
paulo@0:       finished = 1;
paulo@0:       break;
paulo@0:     }
paulo@0: #if DVD_READ_CACHE
paulo@0:     dvdnav_free_cache_block(dvdnav, buf);
paulo@0: #endif
paulo@0:   }
paulo@0: 
paulo@0:   /* destroy dvdnav handle */
paulo@0:   if (dvdnav_close(dvdnav) != DVDNAV_STATUS_OK) {
paulo@0:     printf("Error on dvdnav_close: %s\n", dvdnav_err_to_string(dvdnav));
paulo@0:     return 5;
paulo@0:   }
paulo@0:   close(output_fd);
paulo@0: 
paulo@0:   return 0;
paulo@0: }