summaryrefslogtreecommitdiffstats
path: root/stream/stream_bluray.c
blob: 117b0cc205b22a0266b32af972e8a545345f5c5d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
/*
 * Copyright (C) 2010 Benjamin Zores <ben@geexbox.org>
 *
 * This file is part of mpv.
 *
 * mpv is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * mpv is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with mpv.  If not, see <http://www.gnu.org/licenses/>.
 */

/*
 * Blu-ray parser/reader using libbluray
 *  Use 'git clone git://git.videolan.org/libbluray' to get it.
 *
 * TODO:
 *  - Add descrambled keys database support (KEYDB.cfg)
 *
 */

#include <string.h>
#include <strings.h>
#include <assert.h>

#include <libbluray/bluray.h>
#include <libbluray/meta_data.h>
#include <libbluray/overlay.h>
#include <libbluray/keys.h>
#include <libbluray/bluray-version.h>
#include <libavutil/common.h>

#include "config.h"
#include "talloc.h"
#include "common/common.h"
#include "common/msg.h"
#include "options/m_option.h"
#include "options/options.h"
#include "options/path.h"
#include "stream.h"
#include "osdep/timer.h"
#include "discnav.h"
#include "sub/osd.h"
#include "sub/img_convert.h"
#include "video/mp_image.h"
#include "video/mp_image_pool.h"

#define BLURAY_SECTOR_SIZE     6144

#define BLURAY_DEFAULT_ANGLE      0
#define BLURAY_DEFAULT_CHAPTER    0
#define BLURAY_DEFAULT_TITLE     -2
#define BLURAY_MENU_TITLE        -1

// 90khz ticks
#define BD_TIMEBASE (90000)
#define BD_TIME_TO_MP(x) ((x) / (double)(BD_TIMEBASE))
#define BD_TIME_FROM_MP(x) ((uint64_t)(x * BD_TIMEBASE))

// copied from aacs.h in libaacs
#define AACS_ERROR_CORRUPTED_DISC -1 /* opening or reading of AACS files failed */
#define AACS_ERROR_NO_CONFIG      -2 /* missing config file */
#define AACS_ERROR_NO_PK          -3 /* no matching processing key */
#define AACS_ERROR_NO_CERT        -4 /* no valid certificate */
#define AACS_ERROR_CERT_REVOKED   -5 /* certificate has been revoked */
#define AACS_ERROR_MMC_OPEN       -6 /* MMC open failed (no MMC drive ?) */
#define AACS_ERROR_MMC_FAILURE    -7 /* MMC failed */
#define AACS_ERROR_NO_DK          -8 /* no matching device key */

struct bluray_overlay {
    struct sub_bitmap *image;
    bool clean, hidden;
    int x, y, w, h;
};

struct bluray_priv_s {
    BLURAY *bd;
    BLURAY_TITLE_INFO *title_info;
    int num_titles;
    int current_angle;
    int current_title;
    int current_playlist;

    int cfg_title;
    char *cfg_device;

    // overlay stuffs
    struct bluray_overlay overlays[2], ol_flushed[2];
    struct mp_image_pool *pool;

    // navigation stuffs
    uint64_t next_event;
    uint32_t still_length;
    int mousex, mousey;
    bool in_menu, use_nav, nav_enabled, popup_enabled;
};

static const struct bluray_priv_s bluray_stream_priv_dflts = {
    .cfg_title = BLURAY_DEFAULT_TITLE,
};

static const struct bluray_priv_s bdnav_stream_priv_dflts = {
    .cfg_title = BLURAY_DEFAULT_TITLE,
    .use_nav = true,
};

#define OPT_BASE_STRUCT struct bluray_priv_s
static const m_option_t bluray_stream_opts_fields[] = {
    OPT_CHOICE_OR_INT("title", cfg_title, 0, 0, 99999,
                      ({"longest", BLURAY_DEFAULT_TITLE})),
    OPT_STRING("device", cfg_device, 0),
    {0}
};

static const m_option_t bdnav_stream_opts_fields[] = {
    OPT_CHOICE_OR_INT("title", cfg_title, 0, 0, 99999,
                      ({"menu", BLURAY_MENU_TITLE},
                       {"first", BLURAY_DEFAULT_TITLE})),
    OPT_STRING("device", cfg_device, 0),
    {0}
};

static void destruct(struct bluray_priv_s *priv)
{
    if (priv->title_info)
        bd_free_title_info(priv->title_info);
    bd_close(priv->bd);
    talloc_free(priv->pool);
}

inline static int play_title(struct bluray_priv_s *priv, int title)
{
    if (priv->use_nav) {
        if (title == priv->num_titles - 1)
            title = BLURAY_TITLE_FIRST_PLAY;
        return bd_play_title(priv->bd, title);
    } else
        return bd_select_title(priv->bd, title);
}

static void overlay_release(struct bluray_overlay *overlay)
{
    if (overlay->image)
        talloc_free(overlay->image);
    *overlay = (struct bluray_overlay) { .clean = true };
}

static void overlay_alloc(struct bluray_priv_s *priv,
                          struct bluray_overlay *overlay,
                          int x, int y, int w, int h)
{
    assert(overlay->image == NULL);
    struct sub_bitmap *image = talloc_zero(NULL, struct sub_bitmap);
    overlay->w = image->w = image->dw = w;
    overlay->h = image->h = image->dh = h;
    overlay->x = image->x = x;
    overlay->y = image->y = y;
    struct mp_image *mpi = mp_image_pool_get(priv->pool, IMGFMT_RGBA, w, h);
    mpi = talloc_steal(image, mpi);
    assert(image->w > 0 && image->h > 0 && mpi != NULL);
    image->stride = mpi->stride[0];
    image->bitmap = mpi->planes[0];
    overlay->image = image;
    overlay->clean = true;
    overlay->hidden = false;
}

static void overlay_close_all(struct bluray_priv_s *priv)
{
    for (int i = 0; i < 2; i++)
        overlay_release(&priv->overlays[i]);
}

static void overlay_close(struct bluray_priv_s *priv,
                          const BD_OVERLAY *const bo)
{
    overlay_release(&priv->overlays[bo->plane]);
}

static inline uint32_t conv_rgba(const BD_PG_PALETTE_ENTRY *p)
{
    uint32_t rgba;
    uint8_t *out = (uint8_t*)&rgba;
    const int y = p->Y,  cb = (int)p->Cb - 128,  cr = (int)p->Cr - 128;
    // CAUTION: inaccurate but fast, broken in big endian
#define CONV(a) (MPCLAMP((a), 0, 255)*p->T >> 8)
    out[0] = CONV(y + cb + (cb >> 1) + (cb >> 2) + (cb >> 6));
    out[1] = CONV(y - ((cb >> 2) + (cb >> 4) + (cb >> 5))
                    - ((cr >> 3) + (cr >> 4) + (cr >> 5)));
    out[2] = CONV(y + cr + (cr >> 2) + (cr >> 3) + (cr >> 5));
    out[3] = p->T;
#undef CONV
    return rgba;
}

static void overlay_process(void *data, const BD_OVERLAY *const bo)
{
    stream_t *s = data;
    struct bluray_priv_s *priv = s->priv;
    if (!bo) {
        overlay_close_all(priv);
        return;
    }
    struct bluray_overlay *overlay = &priv->overlays[bo->plane];
    switch (bo->cmd) {
    case BD_OVERLAY_INIT:
        overlay_alloc(priv, overlay, bo->x, bo->y, bo->w, bo->h);
        break;
    case BD_OVERLAY_CLOSE:
        overlay_close(priv, bo);
        break;
    case BD_OVERLAY_CLEAR:
        if (!overlay->clean) {
            memset(overlay->image->bitmap, 0,
                   overlay->image->stride*overlay->h);
            overlay->clean = true;
        }
        break;
    case BD_OVERLAY_DRAW: {
        if (!bo->img)
            break;
        overlay->hidden = false;
        overlay->clean = false;
        struct sub_bitmap *img = overlay->image;
        uint32_t *const origin = img->bitmap;
        const BD_PG_RLE_ELEM *in = bo->img;
        for (int y = 0; y < bo->h; y++) {
            uint32_t *out = origin + (img->stride/4) * (y + bo->y) + bo->x;
            for (int x = 0; x < bo->w; ) {
                uint32_t c = 0;
                if (bo->palette[in->color].T) {
                    c = conv_rgba(&bo->palette[in->color]);
                    for (int i = 0; i < in->len; i++)
                        *out++ = c;
                } else {
                    memset(out, 0, in->len*4);
                    out += in->len;
                }
                x += in->len;
                ++in;
            }
        }
        break;
    }
    case BD_OVERLAY_WIPE: {
        uint32_t *const origin = overlay->image->bitmap;
        for (int y = 0; y < bo->h; y++)
            memset(origin + overlay->w * (y + bo->y) + bo->x, 0, 4 * bo->w);
        break;
    }
    case BD_OVERLAY_HIDE:
        priv->overlays[bo->plane].hidden = true;
        break;
    case BD_OVERLAY_FLUSH: {
        struct bluray_overlay *in = overlay;
        struct bluray_overlay *out = &priv->ol_flushed[bo->plane];
        if (out->image && (out->image->stride != in->image->stride ||
                           out->image->h != in->image->h))
            overlay_release(out);
        if (!out->image)
            overlay_alloc(priv, out, in->x, in->y, in->w, in->h);
        const int len = in->image->stride*in->image->h;
        memcpy(out->image->bitmap, in->image->bitmap, len);
        out->clean = in->clean;
        out->hidden = in->hidden;
        priv->next_event |= 1 << MP_NAV_EVENT_OVERLAY;
        break;
    } default:
        break;
    }
}

static inline bool set_event_type(struct bluray_priv_s *priv, int type,
                                struct mp_nav_event *event)
{
    if (!(priv->next_event & (1 << type)))
        return false;
    priv->next_event &= ~(1 << type);
    event->event = type;
    return true;
}

static void fill_next_event(stream_t *s, struct mp_nav_event **ret)
{
    struct bluray_priv_s *priv = s->priv;
    struct mp_nav_event e = {0};
    // this should be checked before any other events
    if (!set_event_type(priv, MP_NAV_EVENT_RESET_ALL, &e))
        for (int n = 0; n < 30 && !set_event_type(priv, n, &e); n++) ;
    switch (e.event) {
    case MP_NAV_EVENT_NONE:
        return;
    case MP_NAV_EVENT_OVERLAY: {
        for (int i = 0; i < 2; i++) {
            struct bluray_overlay *o = &priv->ol_flushed[i];
            e.u.overlay.images[i] = NULL;
            if (!o->clean && !o->hidden) {
                e.u.overlay.images[i] = o->image;
                o->image = NULL;
            }
        }
        break;
    }
    case MP_NAV_EVENT_MENU_MODE:
        e.u.menu_mode.enable = priv->in_menu;
        break;
    case MP_NAV_EVENT_STILL_FRAME:
        e.u.still_frame.seconds = priv->still_length;
        break;
    }
    *ret = talloc(NULL, struct mp_nav_event);
    **ret = e;
}

static void bluray_stream_close(stream_t *s)
{
    destruct(s->priv);
}

static void handle_event(stream_t *s, const BD_EVENT *ev)
{
    static const int reset_flags = (1 << MP_NAV_EVENT_RESET_ALL)
                                 | (1 << MP_NAV_EVENT_RESET);
    struct bluray_priv_s *b = s->priv;
    switch (ev->event) {
    case BD_EVENT_MENU:
        b->in_menu = ev->param;
        b->next_event |= 1 << MP_NAV_EVENT_MENU_MODE;
        break;
    case BD_EVENT_STILL:
        b->still_length = ev->param ? -1 : 0;
        if (b->nav_enabled)
            b->next_event |= 1 << MP_NAV_EVENT_STILL_FRAME;
        break;
    case BD_EVENT_STILL_TIME:
        b->still_length = ev->param ? -1 : ev->param*1000;
        if (b->nav_enabled)
            b->next_event |= 1 << MP_NAV_EVENT_STILL_FRAME;
        else
            bd_read_skip_still(b->bd);
        break;
    case BD_EVENT_END_OF_TITLE:
        overlay_close_all(b);
        break;
    case BD_EVENT_PLAYLIST:
        b->next_event = reset_flags;
        b->current_playlist = ev->param;
        if (!b->use_nav)
            b->current_title = bd_get_current_title(b->bd);
        if (b->title_info)
            bd_free_title_info(b->title_info);
        b->title_info = bd_get_playlist_info(b->bd, b->current_playlist,
                                             b->current_angle);
        break;
    case BD_EVENT_TITLE:
        b->next_event = reset_flags;
        if (ev->param == BLURAY_TITLE_FIRST_PLAY) {
            if (b->use_nav)
                b->current_title = b->num_titles - 1;
            else
                b->current_title = bd_get_current_title(b->bd);
        } else
            b->current_title = ev->param;
        if (b->title_info) {
            bd_free_title_info(b->title_info);
            b->title_info = NULL;
        }
        break;
    case BD_EVENT_ANGLE:
        b->current_angle = ev->param;
        if (b->title_info) {
            bd_free_title_info(b->title_info);
            b->title_info = bd_get_playlist_info(b->bd, b->current_playlist,
                                                 b->current_angle);
        }
        break;
    case BD_EVENT_POPUP:
        b->popup_enabled = ev->param;
        break;
#if BLURAY_VERSION >= BLURAY_VERSION_CODE(0, 5, 0)
    case BD_EVENT_DISCONTINUITY:
        b->next_event = reset_flags;
        break;
#endif
    default:
        MP_TRACE(s, "Unhandled event: %d %d\n", ev->event, ev->param);
        break;
    }
}

static int bluray_stream_fill_buffer(stream_t *s, char *buf, int len)
{
    struct bluray_priv_s *b = s->priv;
    assert(!b->use_nav);
    BD_EVENT event;
    while (bd_get_event(b->bd, &event))
        handle_event(s, &event);
    return bd_read(b->bd, buf, len);
}

static int bdnav_stream_fill_buffer(stream_t *s, char *buf, int len)
{
    struct bluray_priv_s *b = s->priv;
    assert(b->use_nav);
    BD_EVENT event;
    int read = -1;
    for (;;) {
        read = bd_read_ext(b->bd, buf, len, &event);
        if (read < 0)
            return read;
        if (read == 0) {
            if (event.event == BD_EVENT_NONE)
                return 0; // end of stream
            handle_event(s, &event);
        } else
            break;
    }
    return read;
}

static bd_vk_key_e translate_nav_menu_action(const char *cmd)
{
    if (strcmp(cmd, "mouse") == 0)
        return BD_VK_MOUSE_ACTIVATE;
    if (strcmp(cmd, "up") == 0)
        return BD_VK_UP;
    if (strcmp(cmd, "down") == 0)
        return BD_VK_DOWN;
    if (strcmp(cmd, "left") == 0)
        return BD_VK_LEFT;
    if (strcmp(cmd, "right") == 0)
        return BD_VK_RIGHT;
    if (strcmp(cmd, "select") == 0)
        return BD_VK_ENTER;
    return BD_VK_NONE;
}

static void handle_nav_command(stream_t *s, struct mp_nav_cmd *ev)
{
    struct bluray_priv_s *priv = s->priv;
    switch (ev->event) {
    case MP_NAV_CMD_ENABLE:
        priv->nav_enabled = true;
        break;
    case MP_NAV_CMD_MENU: {
        const int64_t pts = mp_time_us();
        const char *action = ev->u.menu.action;
        bd_vk_key_e key = translate_nav_menu_action(action);
        if (key != BD_VK_NONE) {
            if (key == BD_VK_MOUSE_ACTIVATE)
                ev->mouse_on_button = bd_mouse_select(priv->bd, pts, 
                                                      priv->mousex, 
                                                      priv->mousey);
            bd_user_input(priv->bd, pts, key);
        } else if (strcmp(action, "menu") == 0) {
            if (priv->popup_enabled)
                bd_user_input(priv->bd, pts, BD_VK_POPUP);
            else
                bd_menu_call(priv->bd, pts);
        }
        break;
    } case MP_NAV_CMD_MOUSE_POS:
        priv->mousex = ev->u.mouse_pos.x;
        priv->mousey = ev->u.mouse_pos.y;
        ev->mouse_on_button = bd_mouse_select(priv->bd, mp_time_us(), 
                                              priv->mousex, 
                                              priv->mousey);
        break;
    case MP_NAV_CMD_SKIP_STILL:
        bd_read_skip_still(priv->bd);
        break;
    }
}

static int bluray_stream_control(stream_t *s, int cmd, void *arg)
{
    struct bluray_priv_s *b = s->priv;

    switch (cmd) {
    case STREAM_CTRL_GET_NUM_CHAPTERS: {
        const BLURAY_TITLE_INFO *ti = b->title_info;
        if (!ti)
            return STREAM_UNSUPPORTED;
        *((unsigned int *) arg) = ti->chapter_count;
        return STREAM_OK;
    }
    case STREAM_CTRL_GET_CHAPTER_TIME: {
        const BLURAY_TITLE_INFO *ti = b->title_info;
        if (!ti)
            return STREAM_UNSUPPORTED;
        int chapter = *(double *)arg;
        double time = MP_NOPTS_VALUE;
        if (chapter >= 0 || chapter < ti->chapter_count)
            time = BD_TIME_TO_MP(ti->chapters[chapter].start);
        if (time == MP_NOPTS_VALUE)
            return STREAM_ERROR;
        *(double *)arg = time;
        return STREAM_OK;
    }
    case STREAM_CTRL_SET_CURRENT_TITLE: {
        const uint32_t title = *((unsigned int*)arg);
        if (title >= b->num_titles || !play_title(b, title))
            return STREAM_UNSUPPORTED;
        b->current_title = title;
        return STREAM_OK;
    }
    case STREAM_CTRL_GET_CURRENT_TITLE: {
        *((unsigned int *) arg) = b->current_title;
        return STREAM_OK;
    }
    case STREAM_CTRL_GET_NUM_TITLES: {
        *((unsigned int *)arg) = b->num_titles;
        return STREAM_OK;
    }
    case STREAM_CTRL_GET_TIME_LENGTH: {
        const BLURAY_TITLE_INFO *ti = b->title_info;
        if (!ti)
            return STREAM_UNSUPPORTED;
        *((double *) arg) = BD_TIME_TO_MP(ti->duration);
        return STREAM_OK;
    }
    case STREAM_CTRL_GET_CURRENT_TIME: {
        *((double *) arg) = BD_TIME_TO_MP(bd_tell_time(b->bd));
        return STREAM_OK;
    }
    case STREAM_CTRL_SEEK_TO_TIME: {
        double pts = *((double *) arg);
        bd_seek_time(b->bd, BD_TIME_FROM_MP(pts));
        stream_drop_buffers(s);
        // API makes it hard to determine seeking success
        return STREAM_OK;
    }
    case STREAM_CTRL_GET_NUM_ANGLES: {
        const BLURAY_TITLE_INFO *ti = b->title_info;
        if (!ti)
            return STREAM_UNSUPPORTED;
        *((int *) arg) = ti->angle_count;
        return STREAM_OK;
    }
    case STREAM_CTRL_GET_ANGLE: {
        *((int *) arg) = b->current_angle;
        return STREAM_OK;
    }
    case STREAM_CTRL_SET_ANGLE: {
        const BLURAY_TITLE_INFO *ti = b->title_info;
        if (!ti)
            return STREAM_UNSUPPORTED;
        int angle = *((int *) arg);
        if (angle < 0 || angle > ti->angle_count)
            return STREAM_UNSUPPORTED;
        b->current_angle = angle;
        bd_seamless_angle_change(b->bd, angle);
        return STREAM_OK;
    }
    case STREAM_CTRL_GET_LANG: {
        const BLURAY_TITLE_INFO *ti = b->title_info;
        if (ti && ti->clip_count) {
            struct stream_lang_req *req = arg;
            BLURAY_STREAM_INFO *si = NULL;
            int count = 0;
            switch (req->type) {
            case STREAM_AUDIO:
                count = ti->clips[0].audio_stream_count;
                si = ti->clips[0].audio_streams;
                break;
            case STREAM_SUB:
                count = ti->clips[0].pg_stream_count;
                si = ti->clips[0].pg_streams;
                break;
            }
            for (int n = 0; n < count; n++) {
                BLURAY_STREAM_INFO *i = &si[n];
                if (i->pid == req->id) {
                    snprintf(req->name, sizeof(req->name), "%.4s", i->lang);
                    return STREAM_OK;
                }
            }
        }
        return STREAM_ERROR;
    }
    case STREAM_CTRL_GET_DISC_NAME: {
        const struct meta_dl *meta = bd_get_meta(b->bd);
        if (!meta || !meta->di_name || !meta->di_name[0])
            break;
        *(char**)arg = talloc_strdup(NULL, meta->di_name);
        return STREAM_OK;
    }
    case STREAM_CTRL_NAV_CMD:
        if (!b->use_nav)
            return STREAM_UNSUPPORTED;
        handle_nav_command(s, arg);
        return STREAM_OK;
    case STREAM_CTRL_GET_NAV_EVENT: {
        struct mp_nav_event **ev = arg;
        if (ev)
            fill_next_event(s, ev);
        return STREAM_OK;
    }
    case STREAM_CTRL_GET_SIZE:
        *(int64_t *)arg = bd_get_title_size(b->bd);
        return STREAM_OK;
    default:
        break;
    }

    return STREAM_UNSUPPORTED;
}

static const char *aacs_strerr(int err)
{
    switch (err) {
    case AACS_ERROR_CORRUPTED_DISC: return "opening or reading of AACS files failed";
    case AACS_ERROR_NO_CONFIG:      return "missing config file";
    case AACS_ERROR_NO_PK:          return "no matching processing key";
    case AACS_ERROR_NO_CERT:        return "no valid certificate";
    case AACS_ERROR_CERT_REVOKED:   return "certificate has been revoked";
    case AACS_ERROR_MMC_OPEN:       return "MMC open failed (maybe no MMC drive?)";
    case AACS_ERROR_MMC_FAILURE:    return "MMC failed";
    case AACS_ERROR_NO_DK:          return "no matching device key";
    default:                        return "unknown error";
    }
}

static bool check_disc_info(stream_t *s)
{
    struct bluray_priv_s *b = s->priv;
    const BLURAY_DISC_INFO *info = bd_get_disc_info(b->bd);

    // check Blu-ray
    if (!info->bluray_detected) {
        MP_ERR(s, "Given stream is not a Blu-ray.\n");
        return false;
    }

    // check AACS
    if (info->aacs_detected) {
        if (!info->libaacs_detected) {
            MP_ERR(s, "AACS encryption detected but cannot find libaacs.\n");
            return false;
        }
        if (!info->aacs_handled) {
            MP_ERR(s, "AACS error: %s\n", aacs_strerr(info->aacs_error_code));
            return false;
        }
    }

    // check BD+
    if (info->bdplus_detected) {
        if (!info->libbdplus_detected) {
            MP_ERR(s, "BD+ encryption detected but cannot find libbdplus.\n");
            return false;
        }
        if (!info->bdplus_handled) {
            MP_ERR(s, "Cannot decrypt BD+ encryption.\n");
            return false;
        }
    }

    return true;
}

static void select_initial_title(stream_t *s, int title_guess) {
    struct bluray_priv_s *b = s->priv;

    int title = -1;
    if (b->use_nav) {
        if (b->cfg_title == BLURAY_MENU_TITLE)
            title = 0; // BLURAY_TITLE_TOP_MENU
        else if (b->cfg_title == BLURAY_DEFAULT_TITLE)
            title = b->num_titles - 1;
        else
            title = b->cfg_title;
    } else {
        if (b->cfg_title != BLURAY_DEFAULT_TITLE )
            title = b->cfg_title;
        else
            title = title_guess;
    }
    if (title < 0)
        return;

    if (play_title(b, title))
        b->current_title = title;
    else {
        MP_WARN(s, "Couldn't start title '%d'.\n", title);
        if (!b->use_nav) // cannot query title info in nav
            b->current_title = bd_get_current_title(b->bd);
    }
}

static void select_initial_angle(stream_t *s) {
    struct bluray_priv_s *b = s->priv;
    if (!b->use_nav) // no way to figure out current title info
        return;
    BLURAY_TITLE_INFO *info = bd_get_title_info(b->bd, b->current_title, 0);
    if (!info)
        return;
    /* Select angle */
    unsigned int angle = s->opts->bluray_angle;
    if (!angle)
        angle = BLURAY_DEFAULT_ANGLE;
    angle = FFMIN(angle, info->angle_count);
    if (angle)
        bd_select_angle(b->bd, angle);
    b->current_angle = bd_get_current_angle(b->bd);
    bd_free_title_info(info);
}

static int bluray_stream_open(stream_t *s)
{
    struct bluray_priv_s *b = s->priv;

    const char *device = NULL;
    /* find the requested device */
    if (b->cfg_device && b->cfg_device[0])
        device = b->cfg_device;
    else if (s->opts->bluray_device && s->opts->bluray_device[0])
        device = s->opts->bluray_device;

    if (!device) {
        MP_ERR(s, "No Blu-ray device/location was specified ...\n");
        return STREAM_UNSUPPORTED;
    }

    /* open device */
    BLURAY *bd = bd_open(device, NULL);
    if (!bd) {
        MP_ERR(s, "Couldn't open Blu-ray device: %s\n", device);
        return STREAM_UNSUPPORTED;
    }
    b->bd = bd;

    if (!check_disc_info(s)) {
        destruct(b);
        return STREAM_UNSUPPORTED;
    }

    int title_guess = BLURAY_DEFAULT_TITLE;
    if (b->use_nav) {
        const BLURAY_DISC_INFO *disc_info = bd_get_disc_info(b->bd);
        b->num_titles = disc_info->num_hdmv_titles + disc_info->num_bdj_titles;
        ++b->num_titles; // for BLURAY_TITLE_TOP_MENU
        ++b->num_titles; // for BLURAY_TITLE_FIRST_PLAY
    } else {
        /* check for available titles on disc */
        b->num_titles = bd_get_titles(bd, TITLES_RELEVANT, 0);
        if (!b->num_titles) {
            MP_ERR(s, "Can't find any Blu-ray-compatible title here.\n");
            destruct(b);
            return STREAM_UNSUPPORTED;
        }

        /* parse titles information */
        uint64_t max_duration = 0;
        for (int i = 0; i < b->num_titles; i++) {
            BLURAY_TITLE_INFO *ti = bd_get_title_info(bd, i, 0);
            if (!ti)
                continue;

            /* try to guess which title may contain the main movie */
            if (ti->duration > max_duration) {
                max_duration = ti->duration;
                title_guess = i;
            }

            bd_free_title_info(ti);
        }
    }

    // these should be set before any callback
    b->pool = mp_image_pool_new(6);
    b->current_angle = -1;
    b->current_title = -1;

    // initialize libbluray event queue
    bd_get_event(bd, NULL);

    if (b->use_nav) {
        if (!bd_play(bd)) {
            destruct(b);
            return STREAM_ERROR;
        }
        bd_register_overlay_proc(bd, s, overlay_process);
    }

    select_initial_title(s, title_guess);
    select_initial_angle(s);

    if (b->use_nav)
        s->fill_buffer = bdnav_stream_fill_buffer;
    else
        s->fill_buffer = bluray_stream_fill_buffer;
    s->close       = bluray_stream_close;
    s->control     = bluray_stream_control;
    s->type        = STREAMTYPE_BLURAY;
    s->sector_size = BLURAY_SECTOR_SIZE;
    s->priv        = b;
    s->demuxer     = "+disc";

    MP_VERBOSE(s, "Blu-ray successfully opened.\n");

    return STREAM_OK;
}

const stream_info_t stream_info_bluray = {
    .name = "bd",
    .open = bluray_stream_open,
    .protocols = (const char*const[]){ "bd", "br", "bluray", NULL },
    .priv_defaults = &bluray_stream_priv_dflts,
    .priv_size = sizeof(struct bluray_priv_s),
    .options = bluray_stream_opts_fields,
    .url_options = (const char*const[]){
        "hostname=title",
        "filename=device",
        NULL
    },
};

const stream_info_t stream_info_bdnav = {
    .name = "bdnav",
    .open = bluray_stream_open,
    .protocols = (const char*const[]){ "bdnav", "brnav", "bluraynav", NULL },
    .priv_defaults = &bdnav_stream_priv_dflts,
    .priv_size = sizeof(struct bluray_priv_s),
    .options = bdnav_stream_opts_fields,
    .url_options = (const char*const[]){
        "hostname=title",
        "filename=device",
        NULL
    },
};

static bool check_bdmv(const char *path)
{
    if (strcasecmp(mp_basename(path), "MovieObject.bdmv"))
        return false;

    FILE *temp = fopen(path, "rb");
    if (!temp)
        return false;

    bool r = false;

    const char *sig1 = "MOBJ020";
    const char *sig2 = "MOBJ0100";
    char data[50];

    if (fread(data, 50, 1, temp) == 1) {
        r = memcmp(data, sig1, strlen(sig1)) == 0 ||
            memcmp(data, sig2, strlen(sig2)) == 0;
    }

    fclose(temp);
    return r;
}

// Destructively remove the current trailing path component.
static void remove_prefix(char *path)
{
    size_t len = strlen(path);
#if HAVE_DOS_PATHS
    const char *seps = "/\\";
#else
    const char *seps = "/";
#endif
    while (len > 0 && !strchr(seps, path[len - 1]))
        len--;
    while (len > 0 && strchr(seps, path[len - 1]))
        len--;
    path[len] = '\0';
}

static int bdmv_dir_stream_open(stream_t *stream)
{
    struct bluray_priv_s *priv = talloc_ptrtype(stream, priv);
    stream->priv = priv;
    *priv = bluray_stream_priv_dflts;

    char *path = mp_file_get_path(priv, bstr0(stream->url));
    if (!path)
        goto unsupported;

    // We allow the path to point to a directory containing BDMV/, a
    // directory containing MovieObject.bdmv, or that file itself.
    if (!check_bdmv(path)) {
        // On UNIX, just assume the filename has always this case.
        char *npath = mp_path_join(priv, path, "MovieObject.bdmv");
        if (!check_bdmv(npath)) {
            npath = mp_path_join(priv, path, "BDMV/MovieObject.bdmv");
            if (!check_bdmv(npath))
                goto unsupported;
        }
        path = npath;
    }

    // Go up by 2 levels.
    remove_prefix(path);
    remove_prefix(path);
    priv->cfg_device = path;
    if (strlen(priv->cfg_device) <= 1)
        goto unsupported;

    MP_INFO(stream, "BDMV detected. Redirecting to bluray://\n");
    return bluray_stream_open(stream);

unsupported:
    talloc_free(priv);
    stream->priv = NULL;
    return STREAM_UNSUPPORTED;
}

const stream_info_t stream_info_bdmv_dir = {
    .name = "bdmv/bluray",
    .open = bdmv_dir_stream_open,
    .protocols = (const char*const[]){ "file", "", NULL },
};