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/*****************************************************************************
 * bluray.c: Blu-ray disc support plugin
 *****************************************************************************
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 * Copyright © 2010-2012 VideoLAN, VLC authors and libbluray AUTHORS
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 *
 * Authors: Jean-Baptiste Kempf <jb@videolan.org>
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 *          Hugo Beauzée-Luyssen <hugo@videolan.org>
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 *
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 * This program 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
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 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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LGPL  
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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 * 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 program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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 *****************************************************************************/

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

#include <assert.h>
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#include <limits.h>                         /* PATH_MAX */
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#if defined (HAVE_MNTENT_H) && defined(HAVE_SYS_STAT_H)
#include <mntent.h>
#include <sys/stat.h>
#endif
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#ifdef __APPLE__
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/ucred.h>
#include <sys/mount.h>
#endif

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#include <vlc_common.h>
#include <vlc_plugin.h>
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#include <vlc_demux.h>                      /* demux_t */
#include <vlc_input.h>                      /* Seekpoints, chapters */
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#include <vlc_atomic.h>
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#include <vlc_dialog.h>                     /* BD+/AACS warnings */
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#include <vlc_vout.h>                       /* vout_PutSubpicture / subpicture_t */
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#include <vlc_url.h>                        /* vlc_path2uri */
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#include <libbluray/bluray.h>
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#include <libbluray/keys.h>
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#include <libbluray/meta_data.h>
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#include <libbluray/overlay.h>
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/*****************************************************************************
 * Module descriptor
 *****************************************************************************/

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#define BD_MENU_TEXT        N_( "Blu-ray menus" )
#define BD_MENU_LONGTEXT    N_( "Use Blu-ray menus. If disabled, "\
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                                "the movie will start directly" )
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#define BD_REGION_TEXT      N_( "Region code" )
#define BD_REGION_LONGTEXT  N_( "Blu-Ray player region code. "\
                                "Some discs can be played only with a correct region code.")

static const char *const ppsz_region_code[] = {
    "A", "B", "C" };
static const char *const ppsz_region_code_text[] = {
    "Region A", "Region B", "Region C" };

#define REGION_DEFAULT   1   /* Index to region list. Actual region code is (1<<REGION_DEFAULT) */
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/* Callbacks */
static int  blurayOpen ( vlc_object_t * );
static void blurayClose( vlc_object_t * );

vlc_module_begin ()
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    set_shortname( N_("Blu-ray") )
    set_description( N_("Blu-ray Disc support (libbluray)") )
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    set_category( CAT_INPUT )
    set_subcategory( SUBCAT_INPUT_ACCESS )
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    set_capability( "access_demux", 200)
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    add_bool( "bluray-menu", false, BD_MENU_TEXT, BD_MENU_LONGTEXT, false )
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    add_string( "bluray-region", ppsz_region_code[REGION_DEFAULT], BD_REGION_TEXT, BD_REGION_LONGTEXT, false)
        change_string_list( ppsz_region_code, ppsz_region_code_text )
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    add_shortcut( "bluray", "file" )
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    set_callbacks( blurayOpen, blurayClose )
vlc_module_end ()

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/* libbluray's overlay.h defines 2 types of overlay (bd_overlay_plane_e). */
#define MAX_OVERLAY 2
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typedef enum OverlayStatus {
    Closed = 0,
    ToDisplay,  //Used to mark the overlay to be displayed the first time.
    Displayed,
    Outdated    //used to update the overlay after it has been sent to the vout
} OverlayStatus;

typedef struct bluray_overlay_t
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{
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    atomic_flag         released_once;
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    vlc_mutex_t         lock;
    subpicture_t        *p_pic;
    OverlayStatus       status;
    subpicture_region_t *p_regions;
} bluray_overlay_t;

struct  demux_sys_t
{
    BLURAY              *bluray;
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    /* Titles */
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    unsigned int        i_title;
    unsigned int        i_longest_title;
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    unsigned int        i_current_clip;
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    input_title_t       **pp_title;
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    /* Meta informations */
    const META_DL       *p_meta;

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    /* Menus */
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    bluray_overlay_t    *p_overlays[MAX_OVERLAY];
    int                 current_overlay; // -1 if no current overlay;
    bool                b_menu;

    /* */
    input_thread_t      *p_input;
    vout_thread_t       *p_vout;
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    /* TS stream */
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    es_out_t            *p_out;
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    vlc_array_t         es;
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    int                 i_audio_stream; /* Selected audio stream. -1 if default */
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    int                 i_video_stream;
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    stream_t            *p_parser;
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    /* Used to store bluray disc path */
    char                *psz_bd_path;
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};

struct subpicture_updater_sys_t
{
    bluray_overlay_t    *p_overlay;
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};

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/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
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static es_out_t *esOutNew( demux_t *p_demux );

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static int   blurayControl(demux_t *, int, va_list);
static int   blurayDemux(demux_t *);
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static void  blurayInitTitles(demux_t *p_demux );
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static int   bluraySetTitle(demux_t *p_demux, int i_title);
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static void  blurayOverlayProc(void *ptr, const BD_OVERLAY * const overlay);
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static void  blurayArgbOverlayProc(void *ptr, const BD_ARGB_OVERLAY * const overlay);
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static int   onMouseEvent(vlc_object_t *p_vout, const char *psz_var,
                          vlc_value_t old, vlc_value_t val, void *p_data);
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static void  blurayResetParser(demux_t *p_demux);

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#define FROM_TICKS(a) (a*CLOCK_FREQ / INT64_C(90000))
#define TO_TICKS(a)   (a*INT64_C(90000)/CLOCK_FREQ)
#define CUR_LENGTH    p_sys->pp_title[p_demux->info.i_title]->i_length
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/* */
static void FindMountPoint(char **file)
{
    char *device = *file;
#if defined (HAVE_MNTENT_H) && defined (HAVE_SYS_STAT_H)
    struct stat st;
    if (!stat (device, &st) && S_ISBLK (st.st_mode)) {
        FILE *mtab = setmntent ("/proc/self/mounts", "r");
        struct mntent *m, mbuf;
        char buf [8192];
        /* bd path may be a symlink (e.g. /dev/dvd -> /dev/sr0), so make
         * sure we look up the real device */
        char *bd_device = realpath(device, NULL);
        if (!bd_device)
            bd_device = strdup(device);

        while ((m = getmntent_r (mtab, &mbuf, buf, sizeof(buf))) != NULL) {
            if (!strcmp (m->mnt_fsname, bd_device)) {
                free(device);
                *file = strdup(m->mnt_dir);
                break;
            }
        }
        free(bd_device);
        endmntent (mtab);
    }
#elif defined(__APPLE__)
    struct stat st;
    if (!stat (device, &st) && S_ISBLK (st.st_mode)) {
        int fs_count = getfsstat (NULL, 0, MNT_NOWAIT);
        if (fs_count > 0) {
            struct statfs mbuf[128];
            getfsstat (mbuf, fs_count * sizeof(mbuf[0]), MNT_NOWAIT);
            for (int i = 0; i < fs_count; ++i)
                if (!strcmp (mbuf[i].f_mntfromname, device)) {
                    free(device);
                    *file = strdup(mbuf[i].f_mntonname);
                    return;
                }
        }
    }
#else
# warning Disc device to mount point not implemented
#endif
}

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/*****************************************************************************
 * blurayOpen: module init function
 *****************************************************************************/
static int blurayOpen( vlc_object_t *object )
{
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    demux_t *p_demux = (demux_t*)object;
    demux_sys_t *p_sys;
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    const char *error_msg = NULL;
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    if (strcmp(p_demux->psz_access, "bluray")) {
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        // TODO BDMV support, once we figure out what to do in libbluray
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        return VLC_EGENERIC;
    }

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    /* */
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    p_demux->p_sys = p_sys = calloc(1, sizeof(*p_sys));
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    if (unlikely(!p_sys)) {
        return VLC_ENOMEM;
    }
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    p_sys->current_overlay = -1;
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    p_sys->i_audio_stream = -1;
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    p_sys->i_video_stream = -1;
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    /* init demux info fields */
    p_demux->info.i_update    = 0;
    p_demux->info.i_title     = 0;
    p_demux->info.i_seekpoint = 0;
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    TAB_INIT( p_sys->i_title, p_sys->pp_title );

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    /* store current bd path */
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    if (p_demux->psz_file)
        p_sys->psz_bd_path = strdup(p_demux->psz_file);
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    /* If we're passed a block device, try to convert it to the mount point. */
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    FindMountPoint(&p_sys->psz_bd_path);

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    p_sys->bluray = bd_open(p_sys->psz_bd_path, NULL);
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    if (!p_sys->bluray) {
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        free(p_sys->psz_bd_path);
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        free(p_sys);
        return VLC_EGENERIC;
    }

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    /* Warning the user about AACS/BD+ */
    const BLURAY_DISC_INFO *disc_info = bd_get_disc_info(p_sys->bluray);
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    /* Is it a bluray? */
    if (!disc_info->bluray_detected) {
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        error_msg = "Path doesn't appear to be a Blu-ray";
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        goto error;
    }

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    msg_Info(p_demux, "First play: %i, Top menu: %i\n"
                      "HDMV Titles: %i, BD-J Titles: %i, Other: %i",
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             disc_info->first_play_supported, disc_info->top_menu_supported,
             disc_info->num_hdmv_titles, disc_info->num_bdj_titles,
             disc_info->num_unsupported_titles);

    /* AACS */
    if (disc_info->aacs_detected) {
        if (!disc_info->libaacs_detected) {
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            error_msg = _("This Blu-ray Disc needs a library for AACS decoding, "
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                      "and your system does not have it.");
            goto error;
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        }
        if (!disc_info->aacs_handled) {
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#ifdef BD_AACS_CORRUPTED_DISC
            if (disc_info->aacs_error_code) {
                switch (disc_info->aacs_error_code) {
                    case BD_AACS_CORRUPTED_DISC:
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                        error_msg = _("Blu-ray Disc is corrupted.");
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                        break;
                    case BD_AACS_NO_CONFIG:
                        error_msg = _("Missing AACS configuration file!");
                        break;
                    case BD_AACS_NO_PK:
                        error_msg = _("No valid processing key found in AACS config file.");
                        break;
                    case BD_AACS_NO_CERT:
                        error_msg = _("No valid host certificate found in AACS config file.");
                        break;
                    case BD_AACS_CERT_REVOKED:
                        error_msg = _("AACS Host certificate revoked.");
                        break;
                    case BD_AACS_MMC_FAILED:
                        error_msg = _("AACS MMC failed.");
                        break;
                }
                goto error;
            }
#else
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            error_msg = _("Your system AACS decoding library does not work. "
                      "Missing keys?");
            goto error;
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#endif /* BD_AACS_CORRUPTED_DISC */
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        }
    }

    /* BD+ */
    if (disc_info->bdplus_detected) {
        if (!disc_info->libbdplus_detected) {
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            error_msg = _("This Blu-ray Disc needs a library for BD+ decoding, "
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                      "and your system does not have it.");
            goto error;
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        }
        if (!disc_info->bdplus_handled) {
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            error_msg = _("Your system BD+ decoding library does not work. "
                      "Missing configuration?");
            goto error;
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        }
    }

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    /* set player region code */
    char *psz_region = var_InheritString(p_demux, "bluray-region");
    unsigned int region = psz_region ? (psz_region[0] - 'A') : REGION_DEFAULT;
    free(psz_region);
    bd_set_player_setting(p_sys->bluray, BLURAY_PLAYER_SETTING_REGION_CODE, 1<<region);

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    /* Get titles and chapters */
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    p_sys->p_meta = bd_get_meta(p_sys->bluray);
    if (!p_sys->p_meta)
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        msg_Warn(p_demux, "Failed to get meta info." );
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    blurayInitTitles(p_demux);
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    /*
     * Initialize the event queue, so we can receive events in blurayDemux(Menu).
     */
    bd_get_event(p_sys->bluray, NULL);

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    p_sys->b_menu = var_InheritBool(p_demux, "bluray-menu");
    if (p_sys->b_menu) {
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        p_sys->p_input = demux_GetParentInput(p_demux);
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        if (unlikely(!p_sys->p_input)) {
            error_msg = "Could not get parent input";
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            goto error;
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        }
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        /* Register ARGB overlay handler for BD-J */
        if (disc_info->num_bdj_titles) {
            bd_register_argb_overlay_proc(p_sys->bluray, p_demux, blurayArgbOverlayProc, NULL);
        }

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        /* libbluray will start playback from "First-Title" title */
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        if (bd_play(p_sys->bluray) == 0) {
            error_msg = "Failed to start bluray playback. Please try without menu support.";
            goto error;
        }
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        /* Registering overlay event handler */
        bd_register_overlay_proc(p_sys->bluray, p_demux, blurayOverlayProc);
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    } else {
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        /* set start title number */
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        if (bluraySetTitle(p_demux, p_sys->i_longest_title) != VLC_SUCCESS) {
            msg_Err( p_demux, "Could not set the title %d", p_sys->i_longest_title );
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            goto error;
        }
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    }

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    vlc_array_init(&p_sys->es);
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    p_sys->p_out = esOutNew( p_demux );
    if (unlikely(p_sys->p_out == NULL)) {
        goto error;
    }

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    blurayResetParser( p_demux );
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    if (!p_sys->p_parser) {
        msg_Err(p_demux, "Failed to create TS demuxer");
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        goto error;
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    }

    p_demux->pf_control = blurayControl;
    p_demux->pf_demux   = blurayDemux;
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    return VLC_SUCCESS;
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error:
    if (error_msg)
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        dialog_Fatal(p_demux, _("Blu-ray error"), "%s", error_msg);
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    blurayClose(object);
    return VLC_EGENERIC;
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}


/*****************************************************************************
 * blurayClose: module destroy function
 *****************************************************************************/
static void blurayClose( vlc_object_t *object )
{
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    demux_t *p_demux = (demux_t*)object;
    demux_sys_t *p_sys = p_demux->p_sys;

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    /*
     * Close libbluray first.
     * This will close all the overlays before we release p_vout
     * bd_close( NULL ) can crash
     */
    assert(p_sys->bluray);
    bd_close(p_sys->bluray);

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    if (p_sys->p_vout != NULL) {
        var_DelCallback(p_sys->p_vout, "mouse-moved", &onMouseEvent, p_demux);
        var_DelCallback(p_sys->p_vout, "mouse-clicked", &onMouseEvent, p_demux);
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        vlc_object_release(p_sys->p_vout);
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    }
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    if (p_sys->p_input != NULL)
        vlc_object_release(p_sys->p_input);
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    if (p_sys->p_parser)
        stream_Delete(p_sys->p_parser);
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    if (p_sys->p_out != NULL)
        es_out_Delete(p_sys->p_out);
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    assert( vlc_array_count(&p_sys->es) == 0 );
    vlc_array_clear( &p_sys->es );

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    /* Titles */
    for (unsigned int i = 0; i < p_sys->i_title; i++)
        vlc_input_title_Delete(p_sys->pp_title[i]);
    TAB_CLEAN( p_sys->i_title, p_sys->pp_title );

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    free(p_sys->psz_bd_path);
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    free(p_sys);
}

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/*****************************************************************************
 * Elementary streams handling
 *****************************************************************************/

struct es_out_sys_t {
    demux_t *p_demux;
};

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typedef struct  fmt_es_pair {
    int         i_id;
    es_out_id_t *p_es;
}               fmt_es_pair_t;

static int  findEsPairIndex( demux_sys_t *p_sys, int i_id )
{
    for ( int i = 0; i < vlc_array_count(&p_sys->es); ++i ) {
        if ( ((fmt_es_pair_t*)vlc_array_item_at_index(&p_sys->es, i))->i_id == i_id )
            return i;
    }
    return -1;
}

static int  findEsPairIndexByEs( demux_sys_t *p_sys, es_out_id_t *p_es )
{
    for ( int i = 0; i < vlc_array_count(&p_sys->es); ++i ) {
        if ( ((fmt_es_pair_t*)vlc_array_item_at_index(&p_sys->es, i))->p_es == p_es )
            return i;
    }
    return -1;
}

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static es_out_id_t *esOutAdd( es_out_t *p_out, const es_format_t *p_fmt )
{
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    demux_sys_t *p_sys = p_out->p_sys->p_demux->p_sys;
    es_format_t fmt;

    es_format_Copy(&fmt, p_fmt);
    switch (fmt.i_cat)
    {
    case VIDEO_ES:
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        if ( p_sys->i_video_stream != -1 && p_sys->i_video_stream != p_fmt->i_id )
            fmt.i_priority = -2;
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        break ;
    case AUDIO_ES:
        if ( p_sys->i_audio_stream != -1 && p_sys->i_audio_stream != p_fmt->i_id )
            fmt.i_priority = -2;
        break ;
    case SPU_ES:
        break ;
    }

    es_out_id_t *p_es = es_out_Add( p_out->p_sys->p_demux->out, &fmt );
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    if ( p_fmt->i_id >= 0 ) {
        /* Ensure we are not overriding anything */
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        int idx = findEsPairIndex(p_sys, p_fmt->i_id);
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        if ( idx == -1 ) {
            fmt_es_pair_t *p_pair = malloc( sizeof(*p_pair) );
            if ( likely(p_pair != NULL) ) {
                p_pair->i_id = p_fmt->i_id;
                p_pair->p_es = p_es;
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                msg_Info( p_out->p_sys->p_demux, "Adding ES %d", p_fmt->i_id );
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                vlc_array_append(&p_sys->es, p_pair);
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            }
        }
    }
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    es_format_Clean(&fmt);
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    return p_es;
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}

static int esOutSend( es_out_t *p_out, es_out_id_t *p_es, block_t *p_block )
{
    return es_out_Send( p_out->p_sys->p_demux->out, p_es, p_block );
}

static void esOutDel( es_out_t *p_out, es_out_id_t *p_es )
{
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    int idx = findEsPairIndexByEs( p_out->p_sys->p_demux->p_sys, p_es );
    if (idx >= 0)
    {
        free( vlc_array_item_at_index( &p_out->p_sys->p_demux->p_sys->es, idx) );
        vlc_array_remove(&p_out->p_sys->p_demux->p_sys->es, idx);
    }
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    es_out_Del( p_out->p_sys->p_demux->out, p_es );
}

static int esOutControl( es_out_t *p_out, int i_query, va_list args )
{
    return es_out_vaControl( p_out->p_sys->p_demux->out, i_query, args );
}

static void esOutDestroy( es_out_t *p_out )
{
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    for ( int i = 0; i < vlc_array_count(&p_out->p_sys->p_demux->p_sys->es); ++i )
        free( vlc_array_item_at_index(&p_out->p_sys->p_demux->p_sys->es, i) );
    vlc_array_clear(&p_out->p_sys->p_demux->p_sys->es);
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    free( p_out->p_sys );
    free( p_out );
}

static es_out_t *esOutNew( demux_t *p_demux )
{
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    assert( vlc_array_count(&p_demux->p_sys->es) == 0 );
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    es_out_t    *p_out = malloc( sizeof(*p_out) );
    if ( unlikely(p_out == NULL) )
        return NULL;

    p_out->pf_add       = &esOutAdd;
    p_out->pf_control   = &esOutControl;
    p_out->pf_del       = &esOutDel;
    p_out->pf_destroy   = &esOutDestroy;
    p_out->pf_send      = &esOutSend;

    p_out->p_sys = malloc( sizeof(*p_out->p_sys) );
    if ( unlikely( p_out->p_sys == NULL ) ) {
        free( p_out );
        return NULL;
    }
    p_out->p_sys->p_demux = p_demux;
    return p_out;
}

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/*****************************************************************************
 * subpicture_updater_t functions:
 *****************************************************************************/
static int subpictureUpdaterValidate( subpicture_t *p_subpic,
                                      bool b_fmt_src, const video_format_t *p_fmt_src,
                                      bool b_fmt_dst, const video_format_t *p_fmt_dst,
                                      mtime_t i_ts )
{
    VLC_UNUSED( b_fmt_src );
    VLC_UNUSED( b_fmt_dst );
    VLC_UNUSED( p_fmt_src );
    VLC_UNUSED( p_fmt_dst );
    VLC_UNUSED( i_ts );

    subpicture_updater_sys_t *p_upd_sys = p_subpic->updater.p_sys;
    bluray_overlay_t         *p_overlay = p_upd_sys->p_overlay;

    vlc_mutex_lock(&p_overlay->lock);
    int res = p_overlay->status == Outdated;
    vlc_mutex_unlock(&p_overlay->lock);
    return res;
}

/* This should probably be moved to subpictures.c afterward */
static subpicture_region_t* subpicture_region_Clone(subpicture_region_t *p_region_src)
{
    if (!p_region_src)
        return NULL;
    subpicture_region_t *p_region_dst = subpicture_region_New(&p_region_src->fmt);
    if (unlikely(!p_region_dst))
        return NULL;

    p_region_dst->i_x      = p_region_src->i_x;
    p_region_dst->i_y      = p_region_src->i_y;
    p_region_dst->i_align  = p_region_src->i_align;
    p_region_dst->i_alpha  = p_region_src->i_alpha;

    p_region_dst->psz_text = p_region_src->psz_text ? strdup(p_region_src->psz_text) : NULL;
    p_region_dst->psz_html = p_region_src->psz_html ? strdup(p_region_src->psz_html) : NULL;
    if (p_region_src->p_style != NULL) {
        p_region_dst->p_style = malloc(sizeof(*p_region_dst->p_style));
        p_region_dst->p_style = text_style_Copy(p_region_dst->p_style,
                                                p_region_src->p_style);
    }

    //Palette is already copied by subpicture_region_New, we just have to duplicate p_pixels
    for (int i = 0; i < p_region_src->p_picture->i_planes; i++)
        memcpy(p_region_dst->p_picture->p[i].p_pixels,
               p_region_src->p_picture->p[i].p_pixels,
               p_region_src->p_picture->p[i].i_lines * p_region_src->p_picture->p[i].i_pitch);
    return p_region_dst;
}

static void subpictureUpdaterUpdate(subpicture_t *p_subpic,
                                    const video_format_t *p_fmt_src,
                                    const video_format_t *p_fmt_dst,
                                    mtime_t i_ts)
{
    VLC_UNUSED(p_fmt_src);
    VLC_UNUSED(p_fmt_dst);
    VLC_UNUSED(i_ts);
    subpicture_updater_sys_t *p_upd_sys = p_subpic->updater.p_sys;
    bluray_overlay_t         *p_overlay = p_upd_sys->p_overlay;

    /*
     * When this function is called, all p_subpic regions are gone.
     * We need to duplicate our regions (stored internaly) to this subpic.
     */
    vlc_mutex_lock(&p_overlay->lock);

    subpicture_region_t *p_src = p_overlay->p_regions;
    if (!p_src)
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    {
        vlc_mutex_unlock(&p_overlay->lock);
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        return;
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    }
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    subpicture_region_t **p_dst = &(p_subpic->p_region);
    while (p_src != NULL) {
        *p_dst = subpicture_region_Clone(p_src);
        if (*p_dst == NULL)
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            break;
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        p_dst = &((*p_dst)->p_next);
        p_src = p_src->p_next;
    }
    if (*p_dst != NULL)
        (*p_dst)->p_next = NULL;
    p_overlay->status = Displayed;
    vlc_mutex_unlock(&p_overlay->lock);
}

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static void blurayCleanOverlayStruct(bluray_overlay_t *);

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static void subpictureUpdaterDestroy(subpicture_t *p_subpic)
{
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    blurayCleanOverlayStruct(p_subpic->updater.p_sys->p_overlay);
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}

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/*****************************************************************************
 * User input events:
 *****************************************************************************/
static int onMouseEvent(vlc_object_t *p_vout, const char *psz_var, vlc_value_t old,
                        vlc_value_t val, void *p_data)
{
    demux_t     *p_demux = (demux_t*)p_data;
    demux_sys_t *p_sys   = p_demux->p_sys;
    mtime_t     now      = mdate();
    VLC_UNUSED(old);
    VLC_UNUSED(p_vout);

    if (psz_var[6] == 'm')   //Mouse moved
        bd_mouse_select(p_sys->bluray, now, val.coords.x, val.coords.y);
    else if (psz_var[6] == 'c') {
        bd_mouse_select(p_sys->bluray, now, val.coords.x, val.coords.y);
        bd_user_input(p_sys->bluray, now, BD_VK_MOUSE_ACTIVATE);
    } else {
        assert(0);
    }
    return VLC_SUCCESS;
}

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static int sendKeyEvent(demux_sys_t *p_sys, unsigned int key)
{
    mtime_t now = mdate();
    if (bd_user_input(p_sys->bluray, now, key) < 0) {
        return VLC_EGENERIC;
    }
    return VLC_SUCCESS;
}

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/*****************************************************************************
 * libbluray overlay handling:
 *****************************************************************************/
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static void blurayCleanOverlayStruct(bluray_overlay_t *p_overlay)
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{
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    if (!atomic_flag_test_and_set(&p_overlay->released_once))
        return;
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    /*
     * This will be called when destroying the picture.
     * Don't delete it again from here!
     */
    vlc_mutex_destroy(&p_overlay->lock);
    subpicture_region_Delete(p_overlay->p_regions);
    free(p_overlay);
}

static void blurayCloseAllOverlays(demux_t *p_demux)
{
    demux_sys_t *p_sys = p_demux->p_sys;

    p_demux->p_sys->current_overlay = -1;
    if (p_sys->p_vout != NULL) {
        for (int i = 0; i < 0; i++) {
            if (p_sys->p_overlays[i] != NULL) {
                vout_FlushSubpictureChannel(p_sys->p_vout,
                                            p_sys->p_overlays[i]->p_pic->i_channel);
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                blurayCleanOverlayStruct(p_sys->p_overlays[i]);
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                p_sys->p_overlays[i] = NULL;
            }
        }
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        var_DelCallback(p_sys->p_vout, "mouse-moved", &onMouseEvent, p_demux);
        var_DelCallback(p_sys->p_vout, "mouse-clicked", &onMouseEvent, p_demux);
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        vlc_object_release(p_sys->p_vout);
        p_sys->p_vout = NULL;
    }
}

/*
 * Mark the overlay as "ToDisplay" status.
 * This will not send the overlay to the vout instantly, as the vout
 * may not be acquired (not acquirable) yet.
 * If is has already been acquired, the overlay has already been sent to it,
 * therefore, we only flag the overlay as "Outdated"
 */
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static void blurayActivateOverlay(demux_t *p_demux, int plane)
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{
    demux_sys_t *p_sys = p_demux->p_sys;

    /*
     * If the overlay is already displayed, mark the picture as outdated.
     * We must NOT use vout_PutSubpicture if a picture is already displayed.
     */
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    vlc_mutex_lock(&p_sys->p_overlays[plane]->lock);
    if ((p_sys->p_overlays[plane]->status == Displayed ||
            p_sys->p_overlays[plane]->status == Outdated)
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            && p_sys->p_vout) {
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        p_sys->p_overlays[plane]->status = Outdated;
        vlc_mutex_unlock(&p_sys->p_overlays[plane]->lock);
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        return;
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    }
    /*
     * Mark the overlay as available, but don't display it right now.
     * the blurayDemuxMenu will send it to vout, as it may be unavailable when
     * the overlay is computed
     */
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    p_sys->current_overlay = plane;
    p_sys->p_overlays[plane]->status = ToDisplay;
    vlc_mutex_unlock(&p_sys->p_overlays[plane]->lock);
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}

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static void blurayInitOverlay(demux_t *p_demux, int plane, int width, int height)
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{
    demux_sys_t *p_sys = p_demux->p_sys;

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    assert(p_sys->p_overlays[plane] == NULL);
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    p_sys->p_overlays[plane] = calloc(1, sizeof(**p_sys->p_overlays));
    if (unlikely(!p_sys->p_overlays[plane]))
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        return;

    subpicture_updater_sys_t *p_upd_sys = malloc(sizeof(*p_upd_sys));
    if (unlikely(!p_upd_sys)) {
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        free(p_sys->p_overlays[plane]);
        p_sys->p_overlays[plane] = NULL;
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        return;
    }
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    /* two references: vout + demux */
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    p_sys->p_overlays[plane]->released_once = ATOMIC_FLAG_INIT;
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    p_upd_sys->p_overlay = p_sys->p_overlays[plane];
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    subpicture_updater_t updater = {
        .pf_validate = subpictureUpdaterValidate,
        .pf_update   = subpictureUpdaterUpdate,
        .pf_destroy  = subpictureUpdaterDestroy,
        .p_sys       = p_upd_sys,
    };
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    vlc_mutex_init(&p_sys->p_overlays[plane]->lock);
    p_sys->p_overlays[plane]->p_pic = subpicture_New(&updater);
    p_sys->p_overlays[plane]->p_pic->i_original_picture_width = width;
    p_sys->p_overlays[plane]->p_pic->i_original_picture_height = height;
    p_sys->p_overlays[plane]->p_pic->b_ephemer = true;
    p_sys->p_overlays[plane]->p_pic->b_absolute = true;
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}

/**
 * Destroy every regions in the subpicture.
 * This is done in two steps:
 * - Wiping our private regions list
 * - Flagging the overlay as outdated, so the changes are replicated from
 *   the subpicture_updater_t::pf_update
 * This doesn't destroy the subpicture, as the overlay may be used again by libbluray.
 */
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static void blurayClearOverlay(demux_t *p_demux, int plane)
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{
    demux_sys_t *p_sys = p_demux->p_sys;

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    vlc_mutex_lock(&p_sys->p_overlays[plane]->lock);
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    subpicture_region_ChainDelete(p_sys->p_overlays[plane]->p_regions);
    p_sys->p_overlays[plane]->p_regions = NULL;
    p_sys->p_overlays[plane]->status = Outdated;
    vlc_mutex_unlock(&p_sys->p_overlays[plane]->lock);
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}

/*
 * This will draw to the overlay by adding a region to our region list
 * This will have to be copied to the subpicture used to render the overlay.
 */
static void blurayDrawOverlay(demux_t *p_demux, const BD_OVERLAY* const ov)
{
    demux_sys_t *p_sys = p_demux->p_sys;

    /*
     * Compute a subpicture_region_t.
     * It will be copied and sent to the vout later.
     */
    if (!ov->img)
        return;

    vlc_mutex_lock(&p_sys->p_overlays[ov->plane]->lock);

    /* Find a region to update */
    subpicture_region_t *p_reg = p_sys->p_overlays[ov->plane]->p_regions;
    subpicture_region_t *p_last = NULL;
    while (p_reg != NULL) {
        p_last = p_reg;
        if (p_reg->i_x == ov->x && p_reg->i_y == ov->y &&
                p_reg->fmt.i_width == ov->w && p_reg->fmt.i_height == ov->h)
            break;
        p_reg = p_reg->p_next;
    }

    /* If there is no region to update, create a new one. */
    if (!p_reg) {
        video_format_t fmt;
        video_format_Init(&fmt, 0);
        video_format_Setup(&fmt, VLC_CODEC_YUVP, ov->w, ov->h, 1, 1);

        p_reg = subpicture_region_New(&fmt);
        p_reg->i_x = ov->x;
        p_reg->i_y = ov->y;
        /* Append it to our list. */
        if (p_last != NULL)
            p_last->p_next = p_reg;
        else /* If we don't have a last region, then our list empty */
            p_sys->p_overlays[ov->plane]->p_regions = p_reg;
    }

    /* Now we can update the region, regardless it's an update or an insert */
    const BD_PG_RLE_ELEM *img = ov->img;
    for (int y = 0; y < ov->h; y++) {
        for (int x = 0; x < ov->w;) {
            memset(p_reg->p_picture->p[0].p_pixels +
                   y * p_reg->p_picture->p[0].i_pitch + x,
                   img->color, img->len);
            x += img->len;
            img++;
        }
    }
    if (ov->palette) {
        p_reg->fmt.p_palette->i_entries = 256;
        for (int i = 0; i < 256; ++i) {
            p_reg->fmt.p_palette->palette[i][0] = ov->palette[i].Y;
            p_reg->fmt.p_palette->palette[i][1] = ov->palette[i].Cb;
            p_reg->fmt.p_palette->palette[i][2] = ov->palette[i].Cr;
            p_reg->fmt.p_palette->palette[i][3] = ov->palette[i].T;
        }
    }
    vlc_mutex_unlock(&p_sys->p_overlays[ov->plane]->lock);
    /*
     * /!\ The region is now stored in our internal list, but not in the subpicture /!\
     */
}

static void blurayOverlayProc(void *ptr, const BD_OVERLAY *const overlay)
{
    demux_t *p_demux = (demux_t*)ptr;

    if (!overlay) {
        msg_Info(p_demux, "Closing overlay.");
        blurayCloseAllOverlays(p_demux);
        return;
    }
    switch (overlay->cmd) {
        case BD_OVERLAY_INIT:
            msg_Info(p_demux, "Initializing overlay");
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            blurayInitOverlay(p_demux, overlay->plane, overlay->w, overlay->h);
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            break;
        case BD_OVERLAY_CLEAR:
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            blurayClearOverlay(p_demux, overlay->plane);
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            break;
        case BD_OVERLAY_FLUSH:
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            blurayActivateOverlay(p_demux, overlay->plane);
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            break;
        case BD_OVERLAY_DRAW:
            blurayDrawOverlay(p_demux, overlay);
            break;
        default:
            msg_Warn(p_demux, "Unknown BD overlay command: %u", overlay->cmd);
            break;
    }
}

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/*
 * ARGB overlay (BD-J)
 */

static void blurayInitArgbOverlay(demux_t *p_demux, int plane, int width, int height)
{
    demux_sys_t *p_sys = p_demux->p_sys;

    blurayInitOverlay(p_demux, plane, width, height);

    /* If there is no region, create a new one. */
    subpicture_region_t *p_reg = p_sys->p_overlays[plane]->p_regions;
    if (!p_reg) {
        video_format_t fmt;
        video_format_Init(&fmt, 0);
        video_format_Setup(&fmt, VLC_CODEC_RGBA, width, height, 1, 1);

        p_reg = subpicture_region_New(&fmt);
        p_reg->i_x = 0;
        p_reg->i_y = 0;
        p_sys->p_overlays[plane]->p_regions = p_reg;
    }
}

static void blurayDrawArgbOverlay(demux_t *p_demux, const BD_ARGB_OVERLAY* const ov)
{
    demux_sys_t *p_sys = p_demux->p_sys;

    vlc_mutex_lock(&p_sys->p_overlays[ov->plane]->lock);

    /* Find a region to update */
    subpicture_region_t *p_reg = p_sys->p_overlays[ov->plane]->p_regions;
    if (!p_reg) {
        vlc_mutex_unlock(&p_sys->p_overlays[ov->plane]->lock);
        return;
    }

    /* Now we can update the region */
    const uint32_t *src0 = ov->argb;
    uint8_t        *dst0 = p_reg->p_picture->p[0].p_pixels +
                           p_reg->p_picture->p[0].i_pitch * ov->y +
                           ov->x * 4;

    for (int y = 0; y < ov->h; y++) {
        // XXX: add support for this format ? Should be possible with OPENGL/VDPAU/...
        // - or add libbluray option to select the format ?
        for (int x = 0; x < ov->w; x++) {
            dst0[x*4  ] = src0[x]>>16; /* R */
            dst0[x*4+1] = src0[x]>>8;  /* G */
            dst0[x*4+2] = src0[x];     /* B */
            dst0[x*4+3] = src0[x]>>24; /* A */
        }

        src0 += ov->stride;
        dst0 += p_reg->p_picture->p[0].i_pitch;
    }

    vlc_mutex_unlock(&p_sys->p_overlays[ov->plane]->lock);
    /*
     * /!\ The region is now stored in our internal list, but not in the subpicture /!\
     */
}

static void blurayArgbOverlayProc(void *ptr, const BD_ARGB_OVERLAY *const overlay)
{
    demux_t *p_demux = (demux_t*)ptr;

    switch (overlay->cmd) {
        case BD_ARGB_OVERLAY_INIT:
            blurayInitArgbOverlay(p_demux, overlay->plane, overlay->w, overlay->h);
            break;
        case BD_ARGB_OVERLAY_CLOSE:
            blurayClearOverlay(p_demux, overlay->plane);
            // TODO: blurayCloseOverlay(p_demux, overlay->plane);
            break;
        case BD_ARGB_OVERLAY_FLUSH:
            blurayActivateOverlay(p_demux, overlay->plane);
            break;
        case BD_ARGB_OVERLAY_DRAW:
            blurayDrawArgbOverlay(p_demux, overlay);
            break;
        default:
            msg_Warn(p_demux, "Unknown BD ARGB overlay command: %u", overlay->cmd);
            break;
    }
}

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static void bluraySendOverlayToVout(demux_t *p_demux)
{
    demux_sys_t *p_sys = p_demux->p_sys;

    assert(p_sys->current_overlay >= 0 &&
           p_sys->p_overlays[p_sys->current_overlay] != NULL &&
           p_sys->p_overlays[p_sys->current_overlay]->p_pic != NULL);

    p_sys->p_overlays[p_sys->current_overlay]->p_pic->i_start =
        p_sys->p_overlays[p_sys->current_overlay]->p_pic->i_stop = mdate();
    p_sys->p_overlays[p_sys->current_overlay]->p_pic->i_channel =
        vout_RegisterSubpictureChannel(p_sys->p_vout);
    /*
     * After this point, the picture should not be accessed from the demux thread,
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     * as it is held by the vout thread.
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     * This must be done only once per subpicture, ie. only once between each
     * blurayInitOverlay & blurayCloseOverlay call.
     */
    vout_PutSubpicture(p_sys->p_vout, p_sys->p_overlays[p_sys->current_overlay]->p_pic);
    /*
     * Mark the picture as Outdated, as it contains no region for now.
     * This will make the subpicture_updater_t call pf_update
     */
    p_sys->p_overlays[p_sys->current_overlay]->status = Outdated;
}
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static void blurayInitTitles(demux_t *p_demux )
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{
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    demux_sys_t *p_sys = p_demux->p_sys;
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    /* get and set the titles */
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    unsigned i_title = bd_get_titles(p_sys->bluray, TITLES_RELEVANT, 60);
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    int64_t duration = 0;

    for (unsigned int i = 0; i < i_title; i++) {
        input_title_t *t = vlc_input_title_New();
        if (!t)
            break;

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        BLURAY_TITLE_INFO *title_info = bd_get_title_info(p_sys->bluray, i, 0);
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        if (!title_info)
            break;
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        t->i_length = FROM_TICKS(title_info->duration);
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        if (t->i_length > duration) {
            duration = t->i_length;
            p_sys->i_longest_title = i;
        }

        for ( unsigned int j = 0; j < title_info->chapter_count; j++) {
            seekpoint_t *s = vlc_seekpoint_New();
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            if (!s)
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                break;
            s->i_time_offset = title_info->chapters[j].offset;

            TAB_APPEND( t->i_seekpoint, t->seekpoint, s );
        }
        TAB_APPEND( p_sys->i_title, p_sys->pp_title, t );
        bd_free_title_info(title_info);
    }
}
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static void blurayResetParser( demux_t *p_demux )
{
    /*
     * This is a hack and will have to be removed.
     * The parser should be flushed, and not destroy/created each time
     * we are changing title.
     */
    demux_sys_t *p_sys = p_demux->p_sys;
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    if (p_sys->p_parser)
        stream_Delete(p_sys->p_parser);
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    p_sys->p_parser = stream_DemuxNew(p_demux, "ts", p_sys->p_out);
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    if (!p_sys->p_parser) {
        msg_Err(p_demux, "Failed to create TS demuxer");
    }
}

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static void blurayUpdateTitle(demux_t *p_demux, unsigned i_title)
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{
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    blurayResetParser(p_demux);
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    if (i_title >= p_demux->p_sys->i_title)
        return;
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    /* read title info and init some values */
    p_demux->info.i_title = i_title;
    p_demux->info.i_seekpoint = 0;
    p_demux->info.i_update |= INPUT_UPDATE_TITLE | INPUT_UPDATE_SEEKPOINT;
}
1094

1095 1096 1097
/*****************************************************************************
 * bluraySetTitle: select new BD title
 *****************************************************************************/
1098
static int bluraySetTitle(demux_t *p_demux, int i_title)
1099
{
1100
    demux_sys_t *p_sys = p_demux->p_sys;
1101

1102
    /* Looking for the main title, ie the longest duration */
1103
    if (i_title < 0)
1104
        i_title = p_sys->i_longest_title;
1105 1106
    else if ((unsigned)i_title > p_sys->i_title)
        return VLC_EGENERIC;
1107

1108
    msg_Dbg( p_demux, "Selecting Title %i", i_title);
1109

1110
    /* Select Blu-Ray title */
1111 1112
    if (bd_select_title(p_demux->p_sys->bluray, i_title) == 0 ) {
        msg_Err(p_demux, "cannot select bd title '%d'", p_demux->info.i_title);
1113 1114
        return VLC_EGENERIC;
    }
1115
    blurayUpdateTitle( p_demux, i_title );
1116 1117 1118 1119 1120 1121 1122 1123

    return VLC_SUCCESS;
}


/*****************************************************************************
 * blurayControl: handle the controls
 *****************************************************************************/
1124
static int blurayControl(demux_t *p_demux, int query, va_list args)
1125
{
1126
    demux_sys_t *p_sys = p_demux->p_sys;
1127 1128 1129 1130
    bool     *pb_bool;
    int64_t  *pi_64;

    switch (query) {
1131 1132 1133
        case DEMUX_CAN_SEEK:
        case DEMUX_CAN_PAUSE:
        case DEMUX_CAN_CONTROL_PACE:
1134 1135 1136 1137
             pb_bool = (bool*)va_arg( args, bool * );
             *pb_bool = true;
             break;

1138
        case DEMUX_GET_PTS_DELAY:
1139
            pi_64 = (int64_t*)va_arg( args, int64_t * );
1140 1141
            *pi_64 =
                INT64_C(1000) * var_InheritInteger( p_demux, "disc-caching" );
1142 1143
            break;

1144
        case DEMUX_SET_PAUSE_STATE:
1145 1146 1147
            /* Nothing to do */
            break;

1148
        case DEMUX_SET_TITLE:
1149 1150
        {
            int i_title = (int)va_arg( args, int );
1151
            if (bluraySetTitle(p_demux, i_title) != VLC_SUCCESS)
1152 1153 1154
                return VLC_EGENERIC;
            break;
        }
1155
        case DEMUX_SET_SEEKPOINT:
1156 1157 1158
        {
            int i_chapter = (int)va_arg( args, int );
            bd_seek_chapter( p_sys->bluray, i_chapter );
1159
            p_demux->info.i_update = INPUT_UPDATE_SEEKPOINT;
1160 1161
            break;
        }
1162

1163
        case DEMUX_GET_TITLE_INFO:
1164 1165 1166 1167 <