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/*
 * This file is part of libbluray
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 * Copyright (C) 2009-2010  Obliter0n
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 * Copyright (C) 2009-2010  John Stebbins
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 * Copyright (C) 2010       hpi1
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 *
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 * 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.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
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 *
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 * 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/>.
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 */

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#if HAVE_CONFIG_H
#include "config.h"
#endif

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#include "bluray.h"
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#include "register.h"
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#include "util/macro.h"
#include "util/logging.h"
#include "util/strutl.h"
#include "bdnav/navigation.h"
#include "bdnav/index_parse.h"
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#include "hdmv/hdmv_vm.h"
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#include "file/file.h"
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#ifdef DLOPEN_CRYPTO_LIBS
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#include "file/dl.h"
#endif
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#ifdef USING_BDJAVA
#include "bdj/bdj.h"
#endif
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#ifndef DLOPEN_CRYPTO_LIBS
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#include <libaacs/aacs.h>
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#include <libbdplus/bdplus.h>
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#endif
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#include <stdlib.h>
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#include <inttypes.h>
#include <string.h>
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typedef int     (*fptr_int)();
typedef int32_t (*fptr_int32)();
typedef void*   (*fptr_p_void)();
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#define MAX_EVENTS 31  /* 2^n - 1 */
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typedef struct bd_event_queue_s {
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    unsigned in;  /* next free slot */
    unsigned out; /* next event */
    BD_EVENT ev[MAX_EVENTS];
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} BD_EVENT_QUEUE;

typedef enum {
    title_undef = 0,
    title_hdmv,
    title_bdj,
} BD_TITLE_TYPE;

struct bluray {

    /* current disc */
    char           *device_path;
    INDX_ROOT      *index;
    NAV_TITLE_LIST *title_list;

    /* current playlist */
    NAV_TITLE      *title;
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    uint32_t       title_idx;
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    uint64_t       s_size;
    uint64_t       s_pos;

    /* current clip */
    NAV_CLIP       *clip;
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    BD_FILE_H      *fp;
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    uint64_t       clip_size;
    uint64_t       clip_block_pos;
    uint64_t       clip_pos;

    /* current aligned unit */
    uint8_t        int_buf[6144];
    uint16_t       int_buf_off;

    /* seamless angle change request */
    int            seamless_angle_change;
    uint32_t       angle_change_pkt;
    uint32_t       angle_change_time;
    unsigned       request_angle;

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    /* chapter tracking */
    uint32_t       next_chapter_start;

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    /* aacs */
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#ifdef DLOPEN_CRYPTO_LIBS
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    void           *h_libaacs;   // library handle
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#endif
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    void           *aacs;
    fptr_int       libaacs_decrypt_unit;

    /* BD+ */
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#ifdef DLOPEN_CRYPTO_LIBS
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    void           *h_libbdplus; // library handle
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#endif
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    void           *bdplus;
    fptr_int32     bdplus_seek;
    fptr_int32     bdplus_fixup;

    /* player state */
    BD_REGISTERS   *regs;       // player registers
    BD_EVENT_QUEUE *event_queue; // navigation mode event queue
    BD_TITLE_TYPE  title_type;  // type of current title (in navigation mode)

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    HDMV_VM        *hdmv_vm;
    uint8_t        hdmv_suspended;

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    void           *bdjava;
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};

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#ifdef DLOPEN_CRYPTO_LIBS
#    define DL_CALL(lib,func,param,...)             \
     do {                                           \
          fptr_p_void fptr = dl_dlsym(lib, #func);  \
          if (fptr) {                               \
              fptr(param, ##__VA_ARGS__);           \
          }                                         \
      } while (0)
#else
#    define DL_CALL(lib,func,param,...)         \
     func (param, ##__VA_ARGS__)
#endif

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/*
 * Navigation mode event queue
 */

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static void _init_event_queue(BLURAY *bd)
{
    if (!bd->event_queue) {
        bd->event_queue = calloc(1, sizeof(struct bd_event_queue_s));
    } else {
        memset(bd->event_queue, 0, sizeof(struct bd_event_queue_s));
    }
}

static int _get_event(BLURAY *bd, BD_EVENT *ev)
{
    struct bd_event_queue_s *eq = bd->event_queue;

    if (eq) {
        if (eq->in != eq->out) {
            *ev = eq->ev[eq->out];
            eq->out = (eq->out + 1) & MAX_EVENTS;
            return 1;
        }
    }

    ev->event = BD_EVENT_NONE;

    return 0;
}

static int _queue_event(BLURAY *bd, BD_EVENT ev)
{
    struct bd_event_queue_s *eq = bd->event_queue;

    if (eq) {
        unsigned new_in = (eq->in + 1) & MAX_EVENTS;

        if (new_in != eq->out) {
            eq->ev[eq->in] = ev;
            eq->in = new_in;
            return 0;
        }

        DEBUG(DBG_BLURAY|DBG_CRIT, "_queue_event(%d, %d): queue overflow !\n", ev.event, ev.param);
    }

    return -1;
}

/*
 *
 */

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static int _open_m2ts(BLURAY *bd)
{
    char *f_name;

    f_name = str_printf("%s" DIR_SEP "BDMV" DIR_SEP "STREAM" DIR_SEP "%s",
                        bd->device_path, bd->clip->name);

    bd->clip_pos = (uint64_t)bd->clip->start_pkt * 192;
    bd->clip_block_pos = (bd->clip_pos / 6144) * 6144;

    if (bd->fp != NULL) {
        file_close(bd->fp);
    }
    if ((bd->fp = file_open(f_name, "rb"))) {
        file_seek(bd->fp, 0, SEEK_END);
        if ((bd->clip_size = file_tell(bd->fp))) {
            file_seek(bd->fp, bd->clip_block_pos, SEEK_SET);
            bd->int_buf_off = 6144;
            X_FREE(f_name);

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            if (bd->bdplus) {
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                DL_CALL(bd->h_libbdplus, bdplus_set_title,
                        bd->bdplus, bd->clip->clip_id);
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            }
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            if (bd->aacs) {
                uint32_t title = bd_psr_read(bd->regs, PSR_TITLE_NUMBER);
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                DL_CALL(bd->h_libaacs, aacs_select_title,
                        bd->aacs, title);
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            }

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            bd_psr_write(bd->regs, PSR_PLAYITEM, bd->clip->ref);
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            return 1;
        }

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        DEBUG(DBG_BLURAY, "Clip %s empty! (%p)\n", f_name, bd);
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    }

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    DEBUG(DBG_BLURAY | DBG_CRIT, "Unable to open clip %s! (%p)\n",
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          f_name, bd);

    X_FREE(f_name);
    return 0;
}
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static void _libaacs_close(BLURAY *bd)
{
    if (bd->aacs) {
        DL_CALL(bd->h_libaacs, aacs_close, bd->aacs);
        bd->aacs = NULL;
    }

#ifdef DLOPEN_CRYPTO_LIBS
    if (bd->h_libaacs) {
        dl_dlclose(bd->h_libaacs);
        bd->h_libaacs = NULL;
    }
#endif

    bd->libaacs_decrypt_unit = NULL;
}

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static int _libaacs_open(BLURAY *bd, const char *keyfile_path)
{
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    _libaacs_close(bd);

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#ifdef DLOPEN_CRYPTO_LIBS
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    if ((bd->h_libaacs = dl_dlopen("libaacs", "0"))) {
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        DEBUG(DBG_BLURAY, "Downloaded libaacs (%p)\n", bd->h_libaacs);

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        fptr_p_void fptr = dl_dlsym(bd->h_libaacs, "aacs_open");
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        bd->libaacs_decrypt_unit = dl_dlsym(bd->h_libaacs, "aacs_decrypt_unit");

        if (fptr && bd->libaacs_decrypt_unit) {
            if ((bd->aacs = fptr(bd->device_path, keyfile_path))) {
                DEBUG(DBG_BLURAY, "Opened libaacs (%p)\n", bd->aacs);
                return 1;
            }
            DEBUG(DBG_BLURAY, "aacs_open() failed!\n");
        } else {
            DEBUG(DBG_BLURAY, "libaacs dlsym failed!\n");
        }
        dl_dlclose(bd->h_libaacs);
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        bd->h_libaacs = NULL;

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    } else {
        DEBUG(DBG_BLURAY, "libaacs not found!\n");
    }
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#else
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    DEBUG(DBG_BLURAY, "Using libaacs via normal linking\n");
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    bd->libaacs_decrypt_unit = &aacs_decrypt_unit;
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    if ((bd->aacs = aacs_open(bd->device_path, keyfile_path))) {

        DEBUG(DBG_BLURAY, "Opened libaacs (%p)\n", bd->aacs);
        return 1;
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    }
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    DEBUG(DBG_BLURAY, "aacs_open() failed!\n");
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#endif
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    bd->libaacs_decrypt_unit = NULL;

    return 0;
}

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static void _libbdplus_close(BLURAY *bd)
{
    if (bd->bdplus) {
        DL_CALL(bd->h_libbdplus, bdplus_free, bd->bdplus);
        bd->bdplus = NULL;
    }

#ifdef DLOPEN_CRYPTO_LIBS
    if (bd->h_libbdplus) {
        dl_dlclose(bd->h_libbdplus);
        bd->h_libbdplus = NULL;
    }
#endif

    bd->bdplus_seek  = NULL;
    bd->bdplus_fixup = NULL;
}

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static void _libbdplus_open(BLURAY *bd, const char *keyfile_path)
{
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    _libbdplus_close(bd);

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    // Take a quick stab to see if we want/need bdplus
    // we should fix this, and add various string functions.
    uint8_t vid[16] = {
        0xC5,0x43,0xEF,0x2A,0x15,0x0E,0x50,0xC4,0xE2,0xCA,
        0x71,0x65,0xB1,0x7C,0xA7,0xCB}; // FIXME
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    BD_FILE_H *fd;
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    char *tmp = NULL;
    tmp = str_printf("%s/BDSVM/00000.svm", bd->device_path);
    if ((fd = file_open(tmp, "rb"))) {
        file_close(fd);

        DEBUG(DBG_BDPLUS, "attempting to load libbdplus\n");
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#ifdef DLOPEN_CRYPTO_LIBS
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        if ((bd->h_libbdplus = dl_dlopen("libbdplus", "0"))) {
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            DEBUG(DBG_BLURAY, "Downloaded libbdplus (%p)\n", bd->h_libbdplus);
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            fptr_p_void bdplus_init = dl_dlsym(bd->h_libbdplus, "bdplus_init");
            //bdplus_t *bdplus_init(path,configfile_path,*vid );
            if (bdplus_init)
                bd->bdplus = bdplus_init(bd->device_path, keyfile_path, vid);

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            if (bd->bdplus) {
                // Since we will call these functions a lot, we assign them
                // now.
                bd->bdplus_seek  = dl_dlsym(bd->h_libbdplus, "bdplus_seek");
                bd->bdplus_fixup = dl_dlsym(bd->h_libbdplus, "bdplus_fixup");
            } else {
                dl_dlclose(bd->h_libbdplus);
                bd->h_libbdplus = NULL;
            }
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        }
#else
        DEBUG(DBG_BLURAY,"Using libbdplus via normal linking\n");

        bd->bdplus = bdplus_init(bd->device_path, keyfile_path, vid);

        // Since we will call these functions a lot, we assign them
        // now.
        bd->bdplus_seek  = &bdplus_seek;
        bd->bdplus_fixup = &bdplus_fixup;
#endif
    } // file_open
    X_FREE(tmp);
}

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static int _index_open(BLURAY *bd)
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{
    char *file;

    file = str_printf("%s/BDMV/index.bdmv", bd->device_path);
    bd->index = indx_parse(file);
    X_FREE(file);

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    return !!bd->index;
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}

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BLURAY *bd_open(const char* device_path, const char* keyfile_path)
{
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    BLURAY *bd = calloc(1, sizeof(BLURAY));
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    if (device_path) {
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        bd->device_path = (char*)malloc(strlen(device_path) + 1);
        strcpy(bd->device_path, device_path);
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        _libaacs_open(bd, keyfile_path);
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        _libbdplus_open(bd, keyfile_path);
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        _index_open(bd);
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        bd->regs = bd_registers_init();

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        DEBUG(DBG_BLURAY, "BLURAY initialized! (%p)\n", bd);
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    } else {
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        X_FREE(bd);

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        DEBUG(DBG_BLURAY | DBG_CRIT, "No device path provided!\n");
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    }

    return bd;
}

void bd_close(BLURAY *bd)
{
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    bd_stop_bdj(bd);

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    _libaacs_close(bd);
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    _libbdplus_close(bd);
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    if (bd->fp) {
        file_close(bd->fp);
    }
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    if (bd->title_list != NULL) {
        nav_free_title_list(bd->title_list);
    }
    if (bd->title != NULL) {
        nav_title_close(bd->title);
    }

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    hdmv_vm_free(bd->hdmv_vm);
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    indx_free(bd->index);
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    bd_registers_free(bd->regs);

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    X_FREE(bd->event_queue);
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    X_FREE(bd->device_path);

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    DEBUG(DBG_BLURAY, "BLURAY destroyed! (%p)\n", bd);
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    X_FREE(bd);
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}
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static int _read_block(BLURAY *bd, uint8_t *buf)
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{
    const int len = 6144;

    if (bd->fp) {
        DEBUG(DBG_BLURAY, "Reading unit [%d bytes] at %"PRIu64"... (%p)\n",
              len, bd->clip_block_pos, bd);

        if (len + bd->clip_block_pos <= bd->clip_size) {
            int read_len;

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            if ((read_len = file_read(bd->fp, buf, len))) {
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                if (read_len != len)
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                    DEBUG(DBG_BLURAY | DBG_CRIT, "Read %d bytes at %"PRIu64" ; requested %d ! (%p)\n", read_len, bd->clip_block_pos, len, bd);
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                if (bd->libaacs_decrypt_unit) {
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                    if (!bd->libaacs_decrypt_unit(bd->aacs, buf)) {
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                        DEBUG(DBG_BLURAY, "Unable decrypt unit! (%p)\n", bd);

                        return 0;
                    } // decrypt
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                } // aacs

                bd->clip_block_pos += len;

                // bdplus fixup, if required.
                if (bd->bdplus_fixup && bd->bdplus) {
                    int32_t numFixes;
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                    numFixes = bd->bdplus_fixup(bd->bdplus, len, buf);
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#if 1
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                    if (numFixes) {
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                        DEBUG(DBG_BDPLUS,
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                              "BDPLUS did %u fixups\n", numFixes);
                    }
#endif

                }

                DEBUG(DBG_BLURAY, "Read unit OK! (%p)\n", bd);

                return 1;
            }

            DEBUG(DBG_BLURAY | DBG_CRIT, "Read %d bytes at %"PRIu64" failed ! (%p)\n", len, bd->clip_block_pos, bd);

            return 0;
        }

        DEBUG(DBG_BLURAY | DBG_CRIT, "Read past EOF ! (%p)\n", bd);

        return 0;
    }

    DEBUG(DBG_BLURAY, "No valid title selected! (%p)\n", bd);

    return 0;
}

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static int64_t _seek_internal(BLURAY *bd, NAV_CLIP *clip, uint32_t title_pkt, uint32_t clip_pkt)
{
    if (!clip)
        return -1;

    if (clip->ref != bd->clip->ref) {
        // The position is in a new clip
        bd->clip = clip;
        if (!_open_m2ts(bd)) {
            return -1;
        }
    }
    bd->s_pos = (uint64_t)title_pkt * 192;
    bd->clip_pos = (uint64_t)clip_pkt * 192;
    bd->clip_block_pos = (bd->clip_pos / 6144) * 6144;

    file_seek(bd->fp, bd->clip_block_pos, SEEK_SET);

    bd->int_buf_off = 6144;

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    /* chapter tracking */
    uint32_t current_chapter = bd_get_current_chapter(bd);
    bd->next_chapter_start = bd_chapter_pos(bd, current_chapter + 1);
    bd_psr_write(bd->regs, PSR_CHAPTER,  current_chapter + 1);

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    DEBUG(DBG_BLURAY, "Seek to %"PRIu64" (%p)\n",
          bd->s_pos, bd);
    if (bd->bdplus_seek && bd->bdplus)
        bd->bdplus_seek(bd->bdplus, bd->clip_block_pos);

    return bd->s_pos;
}

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int64_t bd_seek_time(BLURAY *bd, uint64_t tick)
{
    uint32_t clip_pkt, out_pkt;
    NAV_CLIP *clip;

    if (bd->seamless_angle_change) {
        bd->clip = nav_set_angle(bd->title, bd->clip, bd->request_angle);
        bd->seamless_angle_change = 0;
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        bd_psr_write(bd->regs, PSR_ANGLE_NUMBER, bd->title->angle + 1);
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    }
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    tick /= 2;

    if (tick < bd->title->duration) {
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        // Find the closest access unit to the requested position
        clip = nav_time_search(bd->title, tick, &clip_pkt, &out_pkt);

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        return _seek_internal(bd, clip, out_pkt, clip_pkt);
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    }

    return bd->s_pos;
}

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int64_t bd_seek_chapter(BLURAY *bd, unsigned chapter)
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{
    uint32_t clip_pkt, out_pkt;
    NAV_CLIP *clip;

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    if (chapter < bd->title->chap_list.count) {

        // Find the closest access unit to the requested position
        clip = nav_chapter_search(bd->title, chapter, &clip_pkt, &out_pkt);
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        return _seek_internal(bd, clip, out_pkt, clip_pkt);
    }

    return bd->s_pos;
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}

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int64_t bd_chapter_pos(BLURAY *bd, unsigned chapter)
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{
    uint32_t clip_pkt, out_pkt;

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    if (chapter < bd->title->chap_list.count) {
        // Find the closest access unit to the requested position
        nav_chapter_search(bd->title, chapter, &clip_pkt, &out_pkt);
        return (int64_t)out_pkt * 192;
    }

    return -1;
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}

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uint32_t bd_get_current_chapter(BLURAY *bd)
{
    return nav_chapter_get_current(bd->clip, bd->clip_pos / 192);
}

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int64_t bd_seek_mark(BLURAY *bd, unsigned mark)
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{
    uint32_t clip_pkt, out_pkt;
    NAV_CLIP *clip;

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    if (mark < bd->title->mark_list.count) {

        // Find the closest access unit to the requested position
        clip = nav_mark_search(bd->title, mark, &clip_pkt, &out_pkt);
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        return _seek_internal(bd, clip, out_pkt, clip_pkt);
    }

    return bd->s_pos;
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}

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int64_t bd_seek(BLURAY *bd, uint64_t pos)
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{
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    uint32_t pkt, clip_pkt, out_pkt, out_time;
    NAV_CLIP *clip;

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    if (bd->seamless_angle_change) {
        bd->clip = nav_set_angle(bd->title, bd->clip, bd->request_angle);
        bd->seamless_angle_change = 0;
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        bd_psr_write(bd->regs, PSR_ANGLE_NUMBER, bd->title->angle + 1);
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    }
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    if (pos < bd->s_size) {
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        pkt = pos / 192;

        // Find the closest access unit to the requested position
        clip = nav_packet_search(bd->title, pkt, &clip_pkt, &out_pkt, &out_time);
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        return _seek_internal(bd, clip, out_pkt, clip_pkt);
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    }

    return bd->s_pos;
}

static int64_t _clip_seek_time(BLURAY *bd, uint64_t tick)
{
    uint32_t clip_pkt, out_pkt;

    if (tick < bd->clip->out_time) {

        // Find the closest access unit to the requested position
        nav_clip_time_search(bd->clip, tick, &clip_pkt, &out_pkt);
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        return _seek_internal(bd, bd->clip, out_pkt, clip_pkt);
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    }

    return bd->s_pos;
}

int bd_read(BLURAY *bd, unsigned char *buf, int len)
{
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    int out_len;
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    if (bd->fp) {
        out_len = 0;
        DEBUG(DBG_BLURAY, "Reading [%d bytes] at %"PRIu64"... (%p)\n", len, bd->s_pos, bd);

        while (len > 0) {
            uint32_t clip_pkt;

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            unsigned int size = len;
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            // Do we need to read more data?
            clip_pkt = bd->clip_pos / 192;
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            if (bd->seamless_angle_change) {
                if (clip_pkt >= bd->angle_change_pkt) {
                    if (clip_pkt >= bd->clip->end_pkt) {
                        bd->clip = nav_next_clip(bd->title, bd->clip);
                        if (!_open_m2ts(bd)) {
                            return -1;
                        }
                        bd->s_pos = bd->clip->pos;
                    } else {
                        bd->clip = nav_set_angle(bd->title, bd->clip, bd->request_angle);
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                        bd_psr_write(bd->regs, PSR_ANGLE_NUMBER, bd->title->angle + 1);
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                        _clip_seek_time(bd, bd->angle_change_time);
                    }
                    bd->seamless_angle_change = 0;
                } else {
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                    uint64_t angle_pos;
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                    angle_pos = bd->angle_change_pkt * 192;
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                    if (angle_pos - bd->clip_pos < size)
                    {
                        size = angle_pos - bd->clip_pos;
                    }
                }
            }
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            if (bd->int_buf_off == 6144 || clip_pkt >= bd->clip->end_pkt) {

                // Do we need to get the next clip?
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                if (bd->clip == NULL) {
                    // We previously reached the last clip.  Nothing
                    // else to read.
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                    return 0;
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                }
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                if (clip_pkt >= bd->clip->end_pkt) {
                    bd->clip = nav_next_clip(bd->title, bd->clip);
                    if (bd->clip == NULL) {
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                        DEBUG(DBG_BLURAY, "End of title (%p)\n", bd);
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                        return out_len;
                    }
                    if (!_open_m2ts(bd)) {
                        return -1;
                    }
                }
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                if (_read_block(bd, bd->int_buf)) {
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                    bd->int_buf_off = bd->clip_pos % 6144;

                } else {
                    return out_len;
                }
            }
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            if (size > (unsigned int)6144 - bd->int_buf_off) {
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                size = 6144 - bd->int_buf_off;
            }
            memcpy(buf, bd->int_buf + bd->int_buf_off, size);
            buf += size;
            len -= size;
            out_len += size;
            bd->clip_pos += size;
            bd->int_buf_off += size;
            bd->s_pos += size;
        }
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        /* chapter tracking */
        if (bd->s_pos > bd->next_chapter_start) {
            uint32_t current_chapter = bd_get_current_chapter(bd);
            bd->next_chapter_start = bd_chapter_pos(bd, current_chapter + 1);
            bd_psr_write(bd->regs, PSR_CHAPTER, current_chapter + 1);
        }

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        DEBUG(DBG_BLURAY, "%d bytes read OK! (%p)\n", out_len, bd);
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        return out_len;
    }
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    DEBUG(DBG_BLURAY, "No valid title selected! (%p)\n", bd);
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    return -1;
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}
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static int _open_playlist(BLURAY *bd, const char *f_name)
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{
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    if (bd->title) {
        nav_title_close(bd->title);
    }

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    bd->title = nav_title_open(bd->device_path, f_name);
    if (bd->title == NULL) {
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        DEBUG(DBG_BLURAY | DBG_CRIT, "Unable to open title %s! (%p)\n",
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              f_name, bd);
        return 0;
    }
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    bd->seamless_angle_change = 0;
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    bd->s_pos = 0;
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    bd->s_size = (uint64_t)bd->title->packets * 192;
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    bd->next_chapter_start = bd_chapter_pos(bd, 1);

    bd_psr_write(bd->regs, PSR_PLAYLIST, atoi(bd->title->name));
    bd_psr_write(bd->regs, PSR_ANGLE_NUMBER, bd->title->angle + 1);
    bd_psr_write(bd->regs, PSR_CHAPTER, 1);

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    // Get the initial clip of the playlist
    bd->clip = nav_next_clip(bd->title, NULL);
    if (_open_m2ts(bd)) {
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        DEBUG(DBG_BLURAY, "Title %s selected! (%p)\n", f_name, bd);
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        return 1;
    }
    return 0;
}
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int bd_select_playlist(BLURAY *bd, uint32_t playlist)
{
    char *f_name = str_printf("%05d.mpls", playlist);
    int result;

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    if (bd->title_list) {
        /* update current title */
        unsigned i;
        for (i = 0; i < bd->title_list->count; i++) {
            if (playlist == bd->title_list->title_info[i].mpls_id) {
                bd->title_idx = i;
                break;
            }
        }
    }

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    result = _open_playlist(bd, f_name);

    X_FREE(f_name);
    return result;
}

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// Select a title for playback
// The title index is an index into the list
// established by bd_get_titles()
int bd_select_title(BLURAY *bd, uint32_t title_idx)
{
    const char *f_name;

    // Open the playlist
    if (bd->title_list == NULL) {
        DEBUG(DBG_BLURAY, "Title list not yet read! (%p)\n", bd);
        return 0;
    }
    if (bd->title_list->count <= title_idx) {
        DEBUG(DBG_BLURAY, "Invalid title index %d! (%p)\n", title_idx, bd);
        return 0;
    }

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    bd->title_idx = title_idx;
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    f_name = bd->title_list->title_info[title_idx].name;

    return _open_playlist(bd, f_name);
}

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uint32_t bd_get_current_title(BLURAY *bd)
{
    return bd->title_idx;
}

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int bd_select_angle(BLURAY *bd, unsigned angle)
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{
    if (bd->title == NULL) {
        DEBUG(DBG_BLURAY, "Title not yet selected! (%p)\n", bd);
        return 0;
    }
    bd->clip = nav_set_angle(bd->title, bd->clip, angle);
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    bd_psr_write(bd->regs, PSR_ANGLE_NUMBER, bd->title->angle + 1);

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    return 1;
}

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unsigned bd_get_current_angle(BLURAY *bd)
{
    return bd->title->angle;
}


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void bd_seamless_angle_change(BLURAY *bd, unsigned angle)
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{
    uint32_t clip_pkt;

    clip_pkt = (bd->clip_pos + 191) / 192;
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    bd->angle_change_pkt = nav_angle_change_search(bd->clip, clip_pkt,
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                                                   &bd->angle_change_time);
    bd->request_angle = angle;
    bd->seamless_angle_change = 1;
}

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uint64_t bd_get_title_size(BLURAY *bd)
{
    return bd ? bd->s_size : UINT64_C(0);
}
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uint64_t bd_tell(BLURAY *bd)
{
    return bd ? bd->s_pos : INT64_C(0);
}
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uint64_t bd_tell_time(BLURAY *bd)
{
    uint32_t clip_pkt = 0, out_pkt = 0, out_time = 0;

    if (bd && bd->title) {
        nav_packet_search(bd->title, bd->s_pos / 192, &clip_pkt, &out_pkt, &out_time);
    }

    return ((uint64_t)out_time) * 2;
}

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uint32_t bd_get_titles(BLURAY *bd, uint8_t flags)
{
    if (!bd) {
        DEBUG(DBG_BLURAY | DBG_CRIT, "bd_get_titles(NULL) failed (%p)\n", bd);
        return 0;
    }
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    if (bd->title_list != NULL) {
        nav_free_title_list(bd->title_list);
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    }
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    bd->title_list = nav_get_title_list(bd->device_path, flags);
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    if (!bd->title_list) {
        DEBUG(DBG_BLURAY | DBG_CRIT, "nav_get_title_list(%s) failed (%p)\n", bd->device_path, bd);
        return 0;
    }
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    return bd->title_list->count;
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}
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static void _copy_streams(BLURAY_STREAM_INFO *streams, MPLS_STREAM *si, int count)
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{
    int ii;

    for (ii = 0; ii < count; ii++) {
        streams[ii].coding_type = si[ii].coding_type;
        streams[ii].format = si[ii].format;
        streams[ii].rate = si[ii].rate;
        streams[ii].char_code = si[ii].char_code;
        memcpy(streams[ii].lang, si[ii].lang, 4);
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        streams[ii].pid = si[ii].pid;
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    }
}

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static BLURAY_TITLE_INFO* _fill_title_info(NAV_TITLE* title, uint32_t title_idx, uint32_t playlist)
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{
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    BLURAY_TITLE_INFO *title_info;
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    unsigned int ii;
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    title_info = calloc(1, sizeof(BLURAY_TITLE_INFO));
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    title_info->idx = title_idx;
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    title_info->playlist = playlist;
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    title_info->duration = (uint64_t)title->duration * 2;
    title_info->angle_count = title->angle_count;
    title_info->chapter_count = title->chap_list.count;
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    title_info->chapters = calloc(title_info->chapter_count, sizeof(BLURAY_TITLE_CHAPTER));
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    for (ii = 0; ii < title_info->chapter_count; ii++) {
        title_info->chapters[ii].idx = ii;
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        title_info->chapters[ii].start = (uint64_t)title->chap_list.mark[ii].title_time * 2;
        title_info->chapters[ii].duration = (uint64_t)title->chap_list.mark[ii].duration * 2;
        title_info->chapters[ii].offset = (uint64_t)title->chap_list.mark[ii].title_pkt * 192;
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    }
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    title_info->clip_count = title->clip_list.count;
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    title_info->clips = calloc(title_info->clip_count, sizeof(BLURAY_CLIP_INFO));
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    for (ii = 0; ii < title_info->clip_count; ii++) {
        MPLS_PI *pi = &title->pl->play_item[ii];
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        BLURAY_CLIP_INFO *ci = &title_info->clips[ii];
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        ci->video_stream_count = pi->stn.num_video;
        ci->audio_stream_count = pi->stn.num_audio;
        ci->pg_stream_count = pi->stn.num_pg + pi->stn.num_pip_pg;
        ci->ig_stream_count = pi->stn.num_ig;
        ci->sec_video_stream_count = pi->stn.num_secondary_video;
        ci->sec_audio_stream_count = pi->stn.num_secondary_audio;
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        ci->video_streams = calloc(ci->video_stream_count, sizeof(BLURAY_STREAM_INFO));
        ci->audio_streams = calloc(ci->audio_stream_count, sizeof(BLURAY_STREAM_INFO));
        ci->pg_streams = calloc(ci->pg_stream_count, sizeof(BLURAY_STREAM_INFO));
        ci->ig_streams = calloc(ci->ig_stream_count, sizeof(BLURAY_STREAM_INFO));
        ci->sec_video_streams = calloc(ci->sec_video_stream_count, sizeof(BLURAY_STREAM_INFO));
        ci->sec_audio_streams = calloc(ci->sec_audio_stream_count, sizeof(BLURAY_STREAM_INFO));
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        _copy_streams(ci->video_streams, pi->stn.video, ci->video_stream_count);
        _copy_streams(ci->audio_streams, pi->stn.audio, ci->audio_stream_count);
        _copy_streams(ci->pg_streams, pi->stn.pg, ci->pg_stream_count);
        _copy_streams(ci->ig_streams, pi->stn.ig, ci->ig_stream_count);
        _copy_streams(ci->sec_video_streams, pi->stn.secondary_video, ci->sec_video_stream_count);
        _copy_streams(ci->sec_audio_streams, pi->stn.secondary_audio, ci->sec_audio_stream_count);
    }
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    return title_info;
}

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static BLURAY_TITLE_INFO *_get_title_info(BLURAY *bd, uint32_t title_idx, uint32_t playlist, const char *mpls_name)
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{
    NAV_TITLE *title;
    BLURAY_TITLE_INFO *title_info;

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    title = nav_title_open(bd->device_path, mpls_name);
    if (title == NULL) {
        DEBUG(DBG_BLURAY | DBG_CRIT, "Unable to open title %s! (%p)\n",
              mpls_name, bd);
        return NULL;
    }

    title_info = _fill_title_info(title, title_idx, playlist);

    nav_title_close(title);
    return title_info;
}

BLURAY_TITLE_INFO* bd_get_title_info(BLURAY *bd, uint32_t title_idx)
{
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    if (bd->title_list == NULL) {
        DEBUG(DBG_BLURAY, "Title list not yet read! (%p)\n", bd);
        return NULL;
    }
    if (bd->title_list->count <= title_idx) {
        DEBUG(DBG_BLURAY, "Invalid title index %d! (%p)\n", title_idx, bd);
        return NULL;
    }

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    return _get_title_info(bd,
                           title_idx, bd->title_list->title_info[title_idx].mpls_id,
                           bd->title_list->title_info[title_idx].name);
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}

BLURAY_TITLE_INFO* bd_get_playlist_info(BLURAY *bd, uint32_t playlist)
{
    char *f_name = str_printf("%05d.mpls", playlist);
    BLURAY_TITLE_INFO *title_info;

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    title_info = _get_title_info(bd, 0, playlist, f_name);
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    X_FREE(f_name);

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    return title_info;
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}
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void bd_free_title_info(BLURAY_TITLE_INFO *title_info)
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{
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    unsigned int ii;

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    X_FREE(title_info->chapters);
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    for (ii = 0; ii < title_info->clip_count; ii++) {
        X_FREE(title_info->clips[ii].video_streams);
        X_FREE(title_info->clips[ii].audio_streams);
        X_FREE(title_info->clips[ii].pg_streams);
        X_FREE(title_info->clips[ii].ig_streams);
        X_FREE(title_info->clips[ii].sec_video_streams);
        X_FREE(title_info->clips[ii].sec_audio_streams);
    }
    X_FREE(title_info->clips);
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    X_FREE(title_info);
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}
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/*
 * player settings
 */

int bd_set_player_setting(BLURAY *bd, uint32_t idx, uint32_t value)
{
    static const struct { uint32_t idx; uint32_t  psr; } map[] = {
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        { BLURAY_PLAYER_SETTING_PARENTAL,       PSR_PARENTAL },
        { BLURAY_PLAYER_SETTING_AUDIO_CAP,      PSR_AUDIO_CAP },
        { BLURAY_PLAYER_SETTING_AUDIO_LANG,     PSR_AUDIO_LANG },
        { BLURAY_PLAYER_SETTING_PG_LANG,        PSR_PG_AND_SUB_LANG },
        { BLURAY_PLAYER_SETTING_MENU_LANG,      PSR_MENU_LANG },
        { BLURAY_PLAYER_SETTING_COUNTRY_CODE,   PSR_COUNTRY },
        { BLURAY_PLAYER_SETTING_REGION_CODE,    PSR_REGION },
        { BLURAY_PLAYER_SETTING_VIDEO_CAP,      PSR_VIDEO_CAP },
        { BLURAY_PLAYER_SETTING_TEXT_CAP,       PSR_TEXT_CAP },
        { BLURAY_PLAYER_SETTING_PLAYER_PROFILE, PSR_PROFILE_VERSION },
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    };

    unsigned i;

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    if (idx == BLURAY_PLAYER_SETTING_PLAYER_PROFILE) {
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        value = ((value & 0xf) << 16) | 0x0200;  /* version fixed to BD-RO Part 3, version 2.0 */
    }

    for (i = 0; i < sizeof(map) / sizeof(map[0]); i++) {
        if (idx == map[i].idx) {
            return bd_psr_setting_write(bd->regs, idx, value);
        }
    }

    return 0;
}

static uint32_t _string_to_uint(const char *s, int n)
{
    uint32_t val = 0;

    if (n > 4)
        n = 4;

    while (n--)
        val = (val << 8) | s[n];

    return val;
}

int bd_set_player_setting_str(BLURAY *bd, uint32_t idx, const char *s)
{
    switch (idx) {
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        case BLURAY_PLAYER_SETTING_AUDIO_LANG:
        case BLURAY_PLAYER_SETTING_PG_LANG:
        case BLURAY_PLAYER_SETTING_MENU_LANG:
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            return bd_set_player_setting(bd, idx, s ? _string_to_uint(s, 3) : 0xffffff);

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        case BLURAY_PLAYER_SETTING_COUNTRY_CODE:
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            return bd_set_player_setting(bd, idx, s ? _string_to_uint(s, 3) : 0xffff  );

        default:
            return 0;
    }
}

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/*
 * bdj
 */

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int bd_start_bdj(BLURAY *bd, const char *start_object)
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{
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#ifdef USING_BDJAVA
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    if (bd->bdjava == NULL) {
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        bd->bdjava = bdj_open(bd->device_path, start_object, bd->regs, bd);
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        return 0;
    } else {
        DEBUG(DBG_BLURAY | DBG_CRIT, "BD-J is already running (%p)\n", bd);
        return -1;
    }
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#else
    DEBUG(DBG_BLURAY | DBG_CRIT, "%s.bdjo: BD-J not compiled in (%p)\n", start_object, bd);
#endif
    return -1;
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}

void bd_stop_bdj(BLURAY *bd)
{
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    if (bd->bdjava != NULL) {
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#ifdef USING_BDJAVA
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        bdj_close((BDJAVA*)bd->bdjava);
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#else
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        DEBUG(DBG_BLURAY, "BD-J not compiled in (%p)\n", bd);
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#endif
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        bd->bdjava = NULL;
    }
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}
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/*
 * Navigation mode interface
 */

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/*
 * notification events to APP
 */
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static void _process_psr_event(void *handle, BD_PSR_EVENT *ev)
{
    BLURAY *bd = (BLURAY*)handle;

    DEBUG(DBG_BLURAY, "PSR event %d %d (%p)\n", ev->psr_idx, ev->new_val, bd);

    switch (ev->psr_idx) {
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        /* current playback position */

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        case PSR_ANGLE_NUMBER: _queue_event(bd, (BD_EVENT){BD_EVENT_ANGLE, ev->new_val}); break;
        case PSR_TITLE_NUMBER: _queue_event(bd, (BD_EVENT){BD_EVENT_TITLE, ev->new_val}); break;
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        case PSR_PLAYLIST: _queue_event(bd, (BD_EVENT){BD_EVENT_PLAYLIST, ev->new_val}); break;
        case PSR_PLAYITEM: _queue_event(bd, (BD_EVENT){BD_EVENT_PLAYITEM, ev->new_val}); break;
        case PSR_CHAPTER:  _queue_event(bd, (BD_EVENT){BD_EVENT_CHAPTER,  ev->new_val}); break;
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        /* Interactive Graphics */

        case PSR_SELECTED_BUTTON_ID:
            _queue_event(bd, (BD_EVENT){BD_EVENT_SELECTED_BUTTON_ID, ev->new_val});
            break;

        case PSR_MENU_PAGE_ID:
            _queue_event(bd, (BD_EVENT){BD_EVENT_MENU_PAGE_ID, ev->new_val});
            break;

        /* stream selection */

        case PSR_IG_STREAM_ID:
            _queue_event(bd, (BD_EVENT){BD_EVENT_IG_STREAM