# HG changeset patch # User paulo@thepaulopc # Date 1258097185 28800 # Node ID 7e8d91fad6c7304f5a8e8dae98c3df752ed8fdea copy menus.c from examples/ in libdvdnav-4.1.3 diff -r 000000000000 -r 7e8d91fad6c7 menus.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/menus.c Thu Nov 12 23:26:25 2009 -0800 @@ -0,0 +1,281 @@ +/* + * Copyright (C) 2003 by the libdvdnav project + * + * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + * + * $Id: menus.c 1135 2008-09-06 21:55:51Z rathann $ + * + */ + +#include +#include +#include +#include +#include +#include +#include "dvd_types.h" +#include +#include +#include /* For vm_cmd_t */ +#include "dvdnav.h" +#include "dvdnav_events.h" + +/* shall we use libdvdnav's read ahead cache? */ +#define DVD_READ_CACHE 1 + +/* which is the default language for menus/audio/subpictures? */ +#define DVD_LANGUAGE "en" + +#ifdef WIN32 +#define S_IRWXG 0 +#endif + +int main(int argc, char **argv) { + dvdnav_t *dvdnav; + uint8_t mem[DVD_VIDEO_LB_LEN]; + int finished = 0; + int output_fd = 0; + int dump = 0, tt_dump = 0; + + /* open dvdnav handle */ + printf("Opening DVD...\n"); + if (dvdnav_open(&dvdnav, "/dev/dvd") != DVDNAV_STATUS_OK) { + printf("Error on dvdnav_open\n"); + return 1; + } + + /* set read ahead cache usage */ + if (dvdnav_set_readahead_flag(dvdnav, DVD_READ_CACHE) != DVDNAV_STATUS_OK) { + printf("Error on dvdnav_set_readahead_flag: %s\n", dvdnav_err_to_string(dvdnav)); + return 2; + } + + /* set the language */ + if (dvdnav_menu_language_select(dvdnav, DVD_LANGUAGE) != DVDNAV_STATUS_OK || + dvdnav_audio_language_select(dvdnav, DVD_LANGUAGE) != DVDNAV_STATUS_OK || + dvdnav_spu_language_select(dvdnav, DVD_LANGUAGE) != DVDNAV_STATUS_OK) { + printf("Error on setting languages: %s\n", dvdnav_err_to_string(dvdnav)); + return 2; + } + + /* set the PGC positioning flag to have position information relatively to the + * whole feature instead of just relatively to the current chapter */ + if (dvdnav_set_PGC_positioning_flag(dvdnav, 1) != DVDNAV_STATUS_OK) { + printf("Error on dvdnav_set_PGC_positioning_flag: %s\n", dvdnav_err_to_string(dvdnav)); + return 2; + } + + + /* the read loop which regularly calls dvdnav_get_next_block + * and handles the returned events */ + printf("Reading...\n"); + while (!finished) { + int result, event, len; + uint8_t *buf = mem; + + /* the main reading function */ +#if DVD_READ_CACHE + result = dvdnav_get_next_cache_block(dvdnav, &buf, &event, &len); +#else + result = dvdnav_get_next_block(dvdnav, buf, &event, &len); +#endif + + if (result == DVDNAV_STATUS_ERR) { + printf("Error getting next block: %s\n", dvdnav_err_to_string(dvdnav)); + return 3; + } + + switch (event) { + case DVDNAV_BLOCK_OK: + /* We have received a regular block of the currently playing MPEG stream. + * A real player application would now pass this block through demuxing + * and decoding. We simply write it to disc here. */ + + if (!output_fd) { + printf("Opening output...\n"); + output_fd = open("libdvdnav.mpg", O_CREAT | O_WRONLY, S_IRWXU | S_IRWXG); + if (output_fd == -1) { + printf("Error opening output\n"); + return 4; + } + } + + if (dump || tt_dump) + write(output_fd, buf, len); + + break; + case DVDNAV_NOP: + /* Nothing to do here. */ + break; + case DVDNAV_STILL_FRAME: + /* We have reached a still frame. A real player application would wait + * the amount of time specified by the still's length while still handling + * user input to make menus and other interactive stills work. + * A length of 0xff means an indefinite still which has to be skipped + * indirectly by some user interaction. */ + { + dvdnav_still_event_t *still_event = (dvdnav_still_event_t *)buf; + if (still_event->length < 0xff) + printf("Skipping %d seconds of still frame\n", still_event->length); + else + printf("Skipping indefinite length still frame\n"); + dvdnav_still_skip(dvdnav); + } + break; + case DVDNAV_WAIT: + /* We have reached a point in DVD playback, where timing is critical. + * Player application with internal fifos can introduce state + * inconsistencies, because libdvdnav is always the fifo's length + * ahead in the stream compared to what the application sees. + * Such applications should wait until their fifos are empty + * when they receive this type of event. */ + printf("Skipping wait condition\n"); + dvdnav_wait_skip(dvdnav); + break; + case DVDNAV_SPU_CLUT_CHANGE: + /* Player applications should pass the new colour lookup table to their + * SPU decoder */ + break; + case DVDNAV_SPU_STREAM_CHANGE: + /* Player applications should inform their SPU decoder to switch channels */ + break; + case DVDNAV_AUDIO_STREAM_CHANGE: + /* Player applications should inform their audio decoder to switch channels */ + break; + case DVDNAV_HIGHLIGHT: + /* Player applications should inform their overlay engine to highlight the + * given button */ + { + dvdnav_highlight_event_t *highlight_event = (dvdnav_highlight_event_t *)buf; + printf("Selected button %d\n", highlight_event->buttonN); + } + break; + case DVDNAV_VTS_CHANGE: + /* Some status information like video aspect and video scale permissions do + * not change inside a VTS. Therefore this event can be used to query such + * information only when necessary and update the decoding/displaying + * accordingly. */ + break; + case DVDNAV_CELL_CHANGE: + /* Some status information like the current Title and Part numbers do not + * change inside a cell. Therefore this event can be used to query such + * information only when necessary and update the decoding/displaying + * accordingly. */ + { + int32_t tt = 0, ptt = 0; + uint32_t pos, len; + char input = '\0'; + + dvdnav_current_title_info(dvdnav, &tt, &ptt); + dvdnav_get_position(dvdnav, &pos, &len); + printf("Cell change: Title %d, Chapter %d\n", tt, ptt); + printf("At position %.0f%% inside the feature\n", 100 * (double)pos / (double)len); + + dump = 0; + if (tt_dump && tt != tt_dump) + tt_dump = 0; + + if (!dump && !tt_dump) { + fflush(stdin); + while ((input != 'a') && (input != 's') && (input != 'q') && (input != 't')) { + printf("(a)ppend cell to output\n(s)kip cell\nappend until end of (t)itle\n(q)uit\n"); + scanf("%c", &input); + } + + switch (input) { + case 'a': + dump = 1; + break; + case 't': + tt_dump = tt; + break; + case 'q': + finished = 1; + } + } + } + break; + case DVDNAV_NAV_PACKET: + /* A NAV packet provides PTS discontinuity information, angle linking information and + * button definitions for DVD menus. Angles are handled completely inside libdvdnav. + * For the menus to work, the NAV packet information has to be passed to the overlay + * engine of the player so that it knows the dimensions of the button areas. */ + { + pci_t *pci; + + /* Applications with fifos should not use these functions to retrieve NAV packets, + * they should implement their own NAV handling, because the packet you get from these + * functions will already be ahead in the stream which can cause state inconsistencies. + * Applications with fifos should therefore pass the NAV packet through the fifo + * and decoding pipeline just like any other data. */ + pci = dvdnav_get_current_nav_pci(dvdnav); + dvdnav_get_current_nav_dsi(dvdnav); + + if(pci->hli.hl_gi.btn_ns > 0) { + int button; + + printf("Found %i DVD menu buttons...\n", pci->hli.hl_gi.btn_ns); + + for (button = 0; button < pci->hli.hl_gi.btn_ns; button++) { + btni_t *btni = &(pci->hli.btnit[button]); + printf("Button %i top-left @ (%i,%i), bottom-right @ (%i,%i)\n", + button + 1, btni->x_start, btni->y_start, + btni->x_end, btni->y_end); + } + + button = 0; + while ((button <= 0) || (button > pci->hli.hl_gi.btn_ns)) { + printf("Which button (1 to %i): ", pci->hli.hl_gi.btn_ns); + scanf("%i", &button); + } + + printf("Selecting button %i...\n", button); + /* This is the point where applications with fifos have to hand in a NAV packet + * which has traveled through the fifos. See the notes above. */ + dvdnav_button_select_and_activate(dvdnav, pci, button); + } + } + break; + case DVDNAV_HOP_CHANNEL: + /* This event is issued whenever a non-seamless operation has been executed. + * Applications with fifos should drop the fifos content to speed up responsiveness. */ + break; + case DVDNAV_STOP: + /* Playback should end here. */ + { + finished = 1; + } + break; + default: + printf("Unknown event (%i)\n", event); + finished = 1; + break; + } +#if DVD_READ_CACHE + dvdnav_free_cache_block(dvdnav, buf); +#endif + } + + /* destroy dvdnav handle */ + if (dvdnav_close(dvdnav) != DVDNAV_STATUS_OK) { + printf("Error on dvdnav_close: %s\n", dvdnav_err_to_string(dvdnav)); + return 5; + } + close(output_fd); + + return 0; +}