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/*
* Copyright (C) 2000 Rich Wareham <richwareham@users.sourceforge.net>
*
* 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 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 <limits.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/time.h>
#include "dvd_types.h"
#include <dvdread/nav_types.h>
#include <dvdread/ifo_types.h>
#include "remap.h"
#include "vm/decoder.h"
#include "vm/vm.h"
#include "dvdnav.h"
#include "dvdnav_internal.h"
/*
#define LOG_DEBUG
*/
/* Searching API calls */
/* Scan the ADMAP for a particular block number. */
/* Return placed in vobu. */
/* Returns error status */
/* FIXME: Maybe need to handle seeking outside current cell. */
static dvdnav_status_t dvdnav_scan_admap(dvdnav_t *this, int32_t domain, uint32_t seekto_block, uint32_t *vobu) {
vobu_admap_t *admap = NULL;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: Seeking to target %u ...\n", seekto_block);
#endif
*vobu = -1;
/* Search through the VOBU_ADMAP for the nearest VOBU
* to the target block */
switch(domain) {
case FP_DOMAIN:
case VMGM_DOMAIN:
admap = this->vm->vmgi->menu_vobu_admap;
break;
case VTSM_DOMAIN:
admap = this->vm->vtsi->menu_vobu_admap;
break;
case VTS_DOMAIN:
admap = this->vm->vtsi->vts_vobu_admap;
break;
default:
fprintf(MSG_OUT, "libdvdnav: Error: Unknown domain for seeking.\n");
}
if(admap) {
uint32_t address = 0;
uint32_t vobu_start, next_vobu;
int admap_entries = (admap->last_byte + 1 - VOBU_ADMAP_SIZE)/VOBU_ADMAP_SIZE;
/* Search through ADMAP for best sector */
vobu_start = SRI_END_OF_CELL;
/* FIXME: Implement a faster search algorithm */
while(address < admap_entries) {
next_vobu = admap->vobu_start_sectors[address];
/* fprintf(MSG_OUT, "libdvdnav: Found block %u\n", next_vobu); */
if(vobu_start <= seekto_block && next_vobu > seekto_block)
break;
vobu_start = next_vobu;
address++;
}
*vobu = vobu_start;
return DVDNAV_STATUS_OK;
}
fprintf(MSG_OUT, "libdvdnav: admap not located\n");
return DVDNAV_STATUS_ERR;
}
/* FIXME: right now, this function does not use the time tables but interpolates
only the cell times */
dvdnav_status_t dvdnav_time_search(dvdnav_t *this,
uint64_t time) {
uint64_t target = time;
uint64_t length = 0;
uint32_t first_cell_nr, last_cell_nr, cell_nr;
int32_t found;
cell_playback_t *cell;
dvd_state_t *state;
if(this->position_current.still != 0) {
printerr("Cannot seek in a still frame.");
return DVDNAV_STATUS_ERR;
}
pthread_mutex_lock(&this->vm_lock);
state = &(this->vm->state);
if(!state->pgc) {
printerr("No current PGC.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
this->cur_cell_time = 0;
if (this->pgc_based) {
first_cell_nr = 1;
last_cell_nr = state->pgc->nr_of_cells;
} else {
/* 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;
}
found = 0;
for(cell_nr = first_cell_nr; (cell_nr <= last_cell_nr) && !found; cell_nr ++) {
cell = &(state->pgc->cell_playback[cell_nr-1]);
if(cell->block_type == BLOCK_TYPE_ANGLE_BLOCK && cell->block_mode != BLOCK_MODE_FIRST_CELL)
continue;
length = dvdnav_convert_time(&cell->playback_time);
if (target >= length) {
target -= length;
} else {
/* FIXME: there must be a better way than interpolation */
target = target * (cell->last_sector - cell->first_sector + 1) / length;
target += cell->first_sector;
found = 1;
break;
}
}
if(found) {
uint32_t vobu;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: Seeking to cell %i from choice of %i to %i\n",
cell_nr, first_cell_nr, last_cell_nr);
#endif
if (dvdnav_scan_admap(this, state->domain, target, &vobu) == DVDNAV_STATUS_OK) {
uint32_t start = state->pgc->cell_playback[cell_nr-1].first_sector;
if (vm_jump_cell_block(this->vm, cell_nr, vobu - start)) {
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: After cellN=%u blockN=%u target=%x vobu=%x start=%x\n" ,
state->cellN, state->blockN, target, vobu, start);
#endif
this->vm->hop_channel += HOP_SEEK;
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
}
}
fprintf(MSG_OUT, "libdvdnav: Error when seeking\n");
printerr("Error when seeking.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
dvdnav_status_t dvdnav_sector_search(dvdnav_t *this,
uint64_t offset, int32_t origin) {
uint32_t target = 0;
uint32_t length = 0;
uint32_t first_cell_nr, last_cell_nr, cell_nr;
int32_t found;
cell_playback_t *cell;
dvd_state_t *state;
dvdnav_status_t result;
if(this->position_current.still != 0) {
printerr("Cannot seek in a still frame.");
return DVDNAV_STATUS_ERR;
}
result = dvdnav_get_position(this, &target, &length);
if(!result) {
return DVDNAV_STATUS_ERR;
}
pthread_mutex_lock(&this->vm_lock);
state = &(this->vm->state);
if(!state->pgc) {
printerr("No current PGC.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: seeking to offset=%lu pos=%u length=%u\n", offset, target, length);
fprintf(MSG_OUT, "libdvdnav: Before cellN=%u blockN=%u\n", state->cellN, state->blockN);
#endif
switch(origin) {
case SEEK_SET:
if(offset >= length) {
printerr("Request to seek behind end.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
target = offset;
break;
case SEEK_CUR:
if(target + offset >= length) {
printerr("Request to seek behind end.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
target += offset;
break;
case SEEK_END:
if(length < offset) {
printerr("Request to seek before start.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
target = length - offset;
break;
default:
/* Error occured */
printerr("Illegal seek mode.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
this->cur_cell_time = 0;
if (this->pgc_based) {
first_cell_nr = 1;
last_cell_nr = state->pgc->nr_of_cells;
} else {
/* 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;
}
found = 0;
for(cell_nr = first_cell_nr; (cell_nr <= last_cell_nr) && !found; cell_nr ++) {
cell = &(state->pgc->cell_playback[cell_nr-1]);
if(cell->block_type == BLOCK_TYPE_ANGLE_BLOCK && cell->block_mode != BLOCK_MODE_FIRST_CELL)
continue;
length = cell->last_sector - cell->first_sector + 1;
if (target >= length) {
target -= length;
} else {
/* convert the target sector from Cell-relative to absolute physical sector */
target += cell->first_sector;
found = 1;
break;
}
}
if(found) {
uint32_t vobu;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: Seeking to cell %i from choice of %i to %i\n",
cell_nr, first_cell_nr, last_cell_nr);
#endif
if (dvdnav_scan_admap(this, state->domain, target, &vobu) == DVDNAV_STATUS_OK) {
int32_t start = state->pgc->cell_playback[cell_nr-1].first_sector;
if (vm_jump_cell_block(this->vm, cell_nr, vobu - start)) {
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: After cellN=%u blockN=%u target=%x vobu=%x start=%x\n" ,
state->cellN, state->blockN, target, vobu, start);
#endif
this->vm->hop_channel += HOP_SEEK;
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
}
}
fprintf(MSG_OUT, "libdvdnav: Error when seeking\n");
fprintf(MSG_OUT, "libdvdnav: FIXME: Implement seeking to location %u\n", target);
printerr("Error when seeking.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
dvdnav_status_t dvdnav_part_search(dvdnav_t *this, int32_t part) {
int32_t title, old_part;
if (dvdnav_current_title_info(this, &title, &old_part) == DVDNAV_STATUS_OK)
return dvdnav_part_play(this, title, part);
return DVDNAV_STATUS_ERR;
}
dvdnav_status_t dvdnav_prev_pg_search(dvdnav_t *this) {
pthread_mutex_lock(&this->vm_lock);
if(!this->vm->state.pgc) {
printerr("No current PGC.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: previous chapter\n");
#endif
if (!vm_jump_prev_pg(this->vm)) {
fprintf(MSG_OUT, "libdvdnav: previous chapter failed.\n");
printerr("Skip to previous chapter failed.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
this->cur_cell_time = 0;
this->position_current.still = 0;
this->vm->hop_channel++;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: previous chapter done\n");
#endif
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
dvdnav_status_t dvdnav_top_pg_search(dvdnav_t *this) {
pthread_mutex_lock(&this->vm_lock);
if(!this->vm->state.pgc) {
printerr("No current PGC.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: top chapter\n");
#endif
if (!vm_jump_top_pg(this->vm)) {
fprintf(MSG_OUT, "libdvdnav: top chapter failed.\n");
printerr("Skip to top chapter failed.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
this->cur_cell_time = 0;
this->position_current.still = 0;
this->vm->hop_channel++;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: top chapter done\n");
#endif
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
dvdnav_status_t dvdnav_next_pg_search(dvdnav_t *this) {
vm_t *try_vm;
pthread_mutex_lock(&this->vm_lock);
if(!this->vm->state.pgc) {
printerr("No current PGC.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: next chapter\n");
#endif
/* make a copy of current VM and try to navigate the copy to the next PG */
try_vm = vm_new_copy(this->vm);
if (!vm_jump_next_pg(try_vm) || try_vm->stopped) {
vm_free_copy(try_vm);
/* next_pg failed, try to jump at least to the next cell */
try_vm = vm_new_copy(this->vm);
vm_get_next_cell(try_vm);
if (try_vm->stopped) {
vm_free_copy(try_vm);
fprintf(MSG_OUT, "libdvdnav: next chapter failed.\n");
printerr("Skip to next chapter failed.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
}
this->cur_cell_time = 0;
/* merge changes on success */
vm_merge(this->vm, try_vm);
vm_free_copy(try_vm);
this->position_current.still = 0;
this->vm->hop_channel++;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: next chapter done\n");
#endif
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
dvdnav_status_t dvdnav_menu_call(dvdnav_t *this, DVDMenuID_t menu) {
vm_t *try_vm;
pthread_mutex_lock(&this->vm_lock);
if(!this->vm->state.pgc) {
printerr("No current PGC.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
this->cur_cell_time = 0;
/* make a copy of current VM and try to navigate the copy to the menu */
try_vm = vm_new_copy(this->vm);
if ( (menu == DVD_MENU_Escape) && (this->vm->state.domain != VTS_DOMAIN)) {
/* Try resume */
if (vm_jump_resume(try_vm) && !try_vm->stopped) {
/* merge changes on success */
vm_merge(this->vm, try_vm);
vm_free_copy(try_vm);
this->position_current.still = 0;
this->vm->hop_channel++;
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
}
if (menu == DVD_MENU_Escape) menu = DVD_MENU_Root;
if (vm_jump_menu(try_vm, menu) && !try_vm->stopped) {
/* merge changes on success */
vm_merge(this->vm, try_vm);
vm_free_copy(try_vm);
this->position_current.still = 0;
this->vm->hop_channel++;
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
} else {
vm_free_copy(try_vm);
printerr("No such menu or menu not reachable.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
}
dvdnav_status_t dvdnav_get_position(dvdnav_t *this, uint32_t *pos,
uint32_t *len) {
uint32_t cur_sector;
int32_t cell_nr, first_cell_nr, last_cell_nr;
cell_playback_t *cell;
dvd_state_t *state;
if(!this->started) {
printerr("Virtual DVD machine not started.");
return DVDNAV_STATUS_ERR;
}
pthread_mutex_lock(&this->vm_lock);
state = &(this->vm->state);
if(!state->pgc || this->vm->stopped) {
printerr("No current PGC.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
if (this->position_current.hop_channel != this->vm->hop_channel ||
this->position_current.domain != state->domain ||
this->position_current.vts != state->vtsN ||
this->position_current.cell_restart != state->cell_restart) {
printerr("New position not yet determined.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
/* Get current sector */
cur_sector = this->vobu.vobu_start + this->vobu.blockN;
if (this->pgc_based) {
first_cell_nr = 1;
last_cell_nr = state->pgc->nr_of_cells;
} else {
/* 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;
}
*pos = -1;
*len = 0;
for (cell_nr = first_cell_nr; cell_nr <= last_cell_nr; cell_nr++) {
cell = &(state->pgc->cell_playback[cell_nr-1]);
if (cell_nr == state->cellN) {
/* the current sector is in this cell,
* pos is length of PG up to here + sector's offset in this cell */
*pos = *len + cur_sector - cell->first_sector;
}
*len += cell->last_sector - cell->first_sector + 1;
}
assert((signed)*pos != -1);
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
dvdnav_status_t dvdnav_get_position_in_title(dvdnav_t *this,
uint32_t *pos,
uint32_t *len) {
uint32_t cur_sector;
uint32_t first_cell_nr;
uint32_t last_cell_nr;
cell_playback_t *first_cell;
cell_playback_t *last_cell;
dvd_state_t *state;
state = &(this->vm->state);
if(!state->pgc) {
printerr("No current PGC.");
return DVDNAV_STATUS_ERR;
}
/* Get current sector */
cur_sector = this->vobu.vobu_start + this->vobu.blockN;
/* Now find first and last cells in title. */
first_cell_nr = state->pgc->program_map[0];
first_cell = &(state->pgc->cell_playback[first_cell_nr-1]);
last_cell_nr = state->pgc->nr_of_cells;
last_cell = &(state->pgc->cell_playback[last_cell_nr-1]);
*pos = cur_sector - first_cell->first_sector;
*len = last_cell->last_sector - first_cell->first_sector;
return DVDNAV_STATUS_OK;
}
uint32_t dvdnav_describe_title_chapters(dvdnav_t *this, int32_t title, uint64_t **times, uint64_t *duration) {
int32_t retval=0;
uint16_t parts, i;
title_info_t *ptitle = NULL;
ptt_info_t *ptt = NULL;
ifo_handle_t *ifo;
pgc_t *pgc;
cell_playback_t *cell;
uint64_t length, *tmp=NULL;
*times = NULL;
*duration = 0;
pthread_mutex_lock(&this->vm_lock);
if(!this->vm->vmgi) {
printerr("Bad VM state or missing VTSI.");
goto fail;
}
if(!this->started) {
/* don't report an error but be nice */
vm_start(this->vm);
this->started = 1;
}
ifo = vm_get_title_ifo(this->vm, title);
if(!ifo || !ifo->vts_pgcit) {
printerr("Couldn't open IFO for chosen title, exit.");
goto fail;
}
ptitle = &this->vm->vmgi->tt_srpt->title[title-1];
parts = ptitle->nr_of_ptts;
ptt = ifo->vts_ptt_srpt->title[ptitle->vts_ttn-1].ptt;
tmp = calloc(1, sizeof(uint64_t)*parts);
if(!tmp)
goto fail;
length = 0;
for(i=0; i<parts; i++) {
uint32_t cellnr, endcellnr;
pgc = ifo->vts_pgcit->pgci_srp[ptt[i].pgcn-1].pgc;
if(ptt[i].pgn > pgc->nr_of_programs) {
printerr("WRONG part number.");
goto fail;
}
cellnr = pgc->program_map[ptt[i].pgn-1];
if(ptt[i].pgn < pgc->nr_of_programs)
endcellnr = pgc->program_map[ptt[i].pgn];
else
endcellnr = 0;
do {
cell = &pgc->cell_playback[cellnr-1];
if(!(cell->block_type == BLOCK_TYPE_ANGLE_BLOCK &&
cell->block_mode != BLOCK_MODE_FIRST_CELL
))
{
tmp[i] = length + dvdnav_convert_time(&cell->playback_time);
length = tmp[i];
}
cellnr++;
} while(cellnr < endcellnr);
}
*duration = length;
vm_ifo_close(ifo);
retval = parts;
*times = tmp;
fail:
pthread_mutex_unlock(&this->vm_lock);
if(!retval && tmp)
free(tmp);
return retval;
}