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libbluray/src/libbluray/bdnav/index_parse.c

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/*
* This file is part of libbluray
* Copyright (C) 2010-2017 Petri Hintukainen <phintuka@users.sourceforge.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include "index_parse.h"
#include "extdata_parse.h"
#include "bdmv_parse.h"
#include "disc/disc.h"
#include "file/file.h"
#include "util/bits.h"
#include "util/logging.h"
#include "util/macro.h"
#include "util/strutl.h"
#include <stdlib.h>
#include <string.h>
static int _parse_hdmv_obj(BITSTREAM *bs, INDX_HDMV_OBJ *hdmv)
{
hdmv->playback_type = bs_read(bs, 2);
bs_skip(bs, 14);
hdmv->id_ref = bs_read(bs, 16);
bs_skip(bs, 32);
if (hdmv->playback_type != indx_hdmv_playback_type_movie &&
hdmv->playback_type != indx_hdmv_playback_type_interactive) {
BD_DEBUG(DBG_NAV | DBG_CRIT, "index.bdmv: invalid HDMV playback type %d\n", hdmv->playback_type);
}
return 1;
}
static int _parse_bdj_obj(BITSTREAM *bs, INDX_BDJ_OBJ *bdj)
{
bdj->playback_type = bs_read(bs, 2);
bs_skip(bs, 14);
bs_read_string(bs, bdj->name, 5);
bs_skip(bs, 8);
if (bdj->playback_type != indx_bdj_playback_type_movie &&
bdj->playback_type != indx_bdj_playback_type_interactive) {
BD_DEBUG(DBG_NAV | DBG_CRIT, "index.bdmv: invalid BD-J playback type %d\n", bdj->playback_type);
}
return 1;
}
static int _parse_playback_obj(BITSTREAM *bs, INDX_PLAY_ITEM *obj)
{
obj->object_type = bs_read(bs, 2);
bs_skip(bs, 30);
switch (obj->object_type) {
case indx_object_type_hdmv:
return _parse_hdmv_obj(bs, &obj->hdmv);
case indx_object_type_bdj:
return _parse_bdj_obj(bs, &obj->bdj);
}
BD_DEBUG(DBG_NAV | DBG_CRIT, "index.bdmv: unknown object type %d\n", obj->object_type);
return 0;
}
static int _parse_index(BITSTREAM *bs, INDX_ROOT *index)
{
uint32_t index_len, i;
index_len = bs_read(bs, 32);
/* TODO: check if goes to extension data area */
if ((bs_end(bs) - bs_pos(bs))/8 < (int64_t)index_len) {
BD_DEBUG(DBG_NAV | DBG_CRIT, "index.bdmv: invalid index_len %d !\n", index_len);
return 0;
}
if (!_parse_playback_obj(bs, &index->first_play) ||
!_parse_playback_obj(bs, &index->top_menu)) {
return 0;
}
index->num_titles = bs_read(bs, 16);
if (!index->num_titles) {
/* no "normal" titles - check for first play and top menu */
if ((index->first_play.object_type == indx_object_type_hdmv && index->first_play.hdmv.id_ref == 0xffff) &&
(index->top_menu.object_type == indx_object_type_hdmv && index->top_menu.hdmv.id_ref == 0xffff)) {
BD_DEBUG(DBG_CRIT, "empty index\n");
return 0;
}
return 1;
}
index->titles = calloc(index->num_titles, sizeof(INDX_TITLE));
if (!index->titles) {
BD_DEBUG(DBG_CRIT, "out of memory\n");
return 0;
}
if (bs_avail(bs)/(12*8) < index->num_titles) {
BD_DEBUG(DBG_HDMV|DBG_CRIT, "index.bdmv: unexpected EOF\n");
return 0;
}
for (i = 0; i < index->num_titles; i++) {
index->titles[i].object_type = bs_read(bs, 2);
index->titles[i].access_type = bs_read(bs, 2);
bs_skip(bs, 28);
switch (index->titles[i].object_type) {
case indx_object_type_hdmv:
if (!_parse_hdmv_obj(bs, &index->titles[i].hdmv))
return 0;
break;
case indx_object_type_bdj:
if (!_parse_bdj_obj(bs, &index->titles[i].bdj))
return 0;
break;
default:
BD_DEBUG(DBG_NAV | DBG_CRIT, "index.bdmv: unknown object type %d (#%d)\n", index->titles[i].object_type, i);
return 0;
}
}
return 1;
}
static int _parse_app_info(BITSTREAM *bs, INDX_APP_INFO *app_info)
{
uint32_t len;
if (bs_seek_byte(bs, 40) < 0) {
return 0;
}
len = bs_read(bs, 32);
if (len != 34) {
BD_DEBUG(DBG_NAV, "index.bdmv app_info length is %d, expected 34 !\n", len);
}
bs_skip(bs, 1);
app_info->initial_output_mode_preference = bs_read(bs, 1);
app_info->content_exist_flag = bs_read(bs, 1);
bs_skip(bs, 5);
app_info->video_format = bs_read(bs, 4);
app_info->frame_rate = bs_read(bs, 4);
bs_read_bytes(bs, app_info->user_data, 32);
return 1;
}
#define INDX_SIG1 ('I' << 24 | 'N' << 16 | 'D' << 8 | 'X')
static int _parse_header(BITSTREAM *bs,
uint32_t *index_start, uint32_t *extension_data_start,
uint32_t *indx_version)
{
if (!bdmv_parse_header(bs, INDX_SIG1, indx_version)) {
return 0;
}
*index_start = bs_read(bs, 32);
*extension_data_start = bs_read(bs, 32);
return 1;
}
static int _parse_indx_extension_hevc(BITSTREAM *bs, INDX_ROOT *index)
{
uint32_t len;
unsigned unk0, unk1, unk2, unk3, unk4, unk5;
len = bs_read(bs, 32);
if (len < 8) {
BD_DEBUG(DBG_NAV | DBG_CRIT, "index.bdmv: unsupported extension 3.1 length (%d)\n", len);
return 0;
}
index->disc_type = bs_read(bs, 4);
unk0 = bs_read(bs, 3);
index->exist_4k_flag = bs_read(bs, 1);
unk1 = bs_read(bs, 8);
unk2 = bs_read(bs, 3);
index->hdrplus_flag = bs_read(bs, 1);
unk3 = bs_read(bs, 1);
index->dv_flag = bs_read(bs, 1);
index->hdr_flags = bs_read(bs, 2);
unk4 = bs_read(bs, 8);
unk5 = bs_read(bs, 32);
BD_DEBUG(DBG_NAV, "UHD disc type: %d, 4k: %d, HDR: %d, HDR10+: %d, Dolby Vision: %d\n",
index->disc_type, index->exist_4k_flag, index->hdr_flags, index->hdrplus_flag, index->dv_flag);
if (unk0 | unk1 | unk2 | unk3 | unk4 | unk5) {
BD_DEBUG(DBG_CRIT|DBG_NAV,
"index.bdmv: unknown data in extension 3.1: "
"0x%01x 0x%02x 0x%01x 0x%01x 0x%02x 0x%08x\n", unk0, unk1, unk2, unk3, unk4, unk5);
}
return 1;
}
static int
_parse_indx_extension(BITSTREAM *bits, int id1, int id2, void *handle)
{
INDX_ROOT *index = (INDX_ROOT *)handle;
(void)bits;
if (id1 == 3) {
if (id2 == 1) {
return _parse_indx_extension_hevc(bits, index);
}
}
BD_DEBUG(DBG_NAV | DBG_CRIT, "_parse_indx_extension(): unknown extension %d.%d\n", id1, id2);
return 0;
}
static INDX_ROOT *_indx_parse(BD_FILE_H *fp)
{
BITSTREAM bs;
INDX_ROOT *index;
uint32_t indexes_start, extension_data_start;
if (bs_init(&bs, fp) < 0) {
BD_DEBUG(DBG_NAV, "index.bdmv: read error\n");
return NULL;
}
index = calloc(1, sizeof(INDX_ROOT));
if (!index) {
BD_DEBUG(DBG_CRIT, "out of memory\n");
return NULL;
}
if (!_parse_header(&bs, &indexes_start, &extension_data_start, &index->indx_version) ||
!_parse_app_info(&bs, &index->app_info)) {
indx_free(&index);
return NULL;
}
if (bs_seek_byte(&bs, indexes_start) < 0) {
indx_free(&index);
return NULL;
}
if (!_parse_index(&bs, index)) {
indx_free(&index);
return NULL;
}
if (extension_data_start) {
bdmv_parse_extension_data(&bs,
extension_data_start,
_parse_indx_extension,
index);
}
return index;
}
static INDX_ROOT *_indx_get(BD_DISC *disc, const char *path)
{
BD_FILE_H *fp;
INDX_ROOT *index;
fp = disc_open_path(disc, path);
if (!fp) {
return NULL;
}
index = _indx_parse(fp);
file_close(fp);
return index;
}
INDX_ROOT *indx_get(BD_DISC *disc)
{
INDX_ROOT *index;
index = _indx_get(disc, "BDMV" DIR_SEP "index.bdmv");
if (!index) {
/* try backup */
index = _indx_get(disc, "BDMV" DIR_SEP "BACKUP" DIR_SEP "index.bdmv");
}
return index;
}
void indx_free(INDX_ROOT **p)
{
if (p && *p) {
X_FREE((*p)->titles);
X_FREE(*p);
}
}
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