aboutsummaryrefslogtreecommitdiffhomepage
path: root/video/out/vo_xv.c
blob: e75a653d6544548e900e0e4bd2bf85e27730a6ac (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
/*
 * X11 Xv interface
 *
 * 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/>.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>
#include <errno.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>

#include <libavutil/common.h>

#include "config.h"

#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <X11/extensions/XShm.h>

// Note: depends on the inclusion of X11/extensions/XShm.h
#include <X11/extensions/Xv.h>
#include <X11/extensions/Xvlib.h>

#include "options/options.h"
#include "mpv_talloc.h"
#include "common/msg.h"
#include "vo.h"
#include "video/mp_image.h"
#include "x11_common.h"
#include "sub/osd.h"
#include "sub/draw_bmp.h"
#include "video/csputils.h"
#include "options/m_option.h"
#include "input/input.h"
#include "osdep/timer.h"

#define CK_METHOD_NONE       0 // no colorkey drawing
#define CK_METHOD_BACKGROUND 1 // set colorkey as window background
#define CK_METHOD_AUTOPAINT  2 // let xv draw the colorkey
#define CK_METHOD_MANUALFILL 3 // manually draw the colorkey
#define CK_SRC_USE           0 // use specified / default colorkey
#define CK_SRC_SET           1 // use and set specified / default colorkey
#define CK_SRC_CUR           2 // use current colorkey (get it from xv)

#define MAX_BUFFERS 10

struct xvctx {
    struct xv_ck_info_s {
        int method; // CK_METHOD_* constants
        int source; // CK_SRC_* constants
    } xv_ck_info;
    int colorkey;
    unsigned long xv_colorkey;
    int xv_port;
    int cfg_xv_adaptor;
    int cfg_buffers;
    XvAdaptorInfo *ai;
    XvImageFormatValues *fo;
    unsigned int formats, adaptors, xv_format;
    int current_buf;
    int current_ip_buf;
    int num_buffers;
    XvImage *xvimage[MAX_BUFFERS];
    struct mp_image *original_image;
    uint32_t image_width;
    uint32_t image_height;
    uint32_t image_format;
    int cached_csp;
    struct mp_rect src_rect;
    struct mp_rect dst_rect;
    uint32_t max_width, max_height; // zero means: not set
    GC f_gc;    // used to paint background
    GC vo_gc;   // used to paint video
    int Shmem_Flag;
    XShmSegmentInfo Shminfo[MAX_BUFFERS];
    int Shm_Warned_Slow;
};

#define MP_FOURCC(a,b,c,d) ((a) | ((b)<<8) | ((c)<<16) | ((unsigned)(d)<<24))

#define MP_FOURCC_YV12  MP_FOURCC('Y', 'V', '1', '2')
#define MP_FOURCC_I420  MP_FOURCC('I', '4', '2', '0')
#define MP_FOURCC_IYUV  MP_FOURCC('I', 'Y', 'U', 'V')
#define MP_FOURCC_UYVY  MP_FOURCC('U', 'Y', 'V', 'Y')

struct fmt_entry {
    int imgfmt;
    int fourcc;
};
static const struct fmt_entry fmt_table[] = {
    {IMGFMT_420P,       MP_FOURCC_YV12},
    {IMGFMT_420P,       MP_FOURCC_I420},
    {IMGFMT_UYVY,       MP_FOURCC_UYVY},
    {0}
};

static bool allocate_xvimage(struct vo *, int);
static void deallocate_xvimage(struct vo *vo, int foo);
static struct mp_image get_xv_buffer(struct vo *vo, int buf_index);

static int find_xv_format(int imgfmt)
{
    for (int n = 0; fmt_table[n].imgfmt; n++) {
        if (fmt_table[n].imgfmt == imgfmt)
            return fmt_table[n].fourcc;
    }
    return 0;
}

static int xv_find_atom(struct vo *vo, uint32_t xv_port, const char *name,
                        bool get, int *min, int *max)
{
    Atom atom = None;
    int howmany = 0;
    XvAttribute *attributes = XvQueryPortAttributes(vo->x11->display, xv_port,
                                                    &howmany);
    for (int i = 0; i < howmany && attributes; i++) {
        int flag = get ? XvGettable : XvSettable;
        if (attributes[i].flags & flag) {
            atom = XInternAtom(vo->x11->display, attributes[i].name, True);
            *min = attributes[i].min_value;
            *max = attributes[i].max_value;
/* since we have SET_DEFAULTS first in our list, we can check if it's available
   then trigger it if it's ok so that the other values are at default upon query */
            if (atom != None) {
                if (!strcmp(attributes[i].name, "XV_BRIGHTNESS") &&
                    (!strcmp(name, "brightness")))
                    break;
                else if (!strcmp(attributes[i].name, "XV_CONTRAST") &&
                         (!strcmp(name, "contrast")))
                    break;
                else if (!strcmp(attributes[i].name, "XV_SATURATION") &&
                         (!strcmp(name, "saturation")))
                    break;
                else if (!strcmp(attributes[i].name, "XV_HUE") &&
                         (!strcmp(name, "hue")))
                    break;
                if (!strcmp(attributes[i].name, "XV_RED_INTENSITY") &&
                    (!strcmp(name, "red_intensity")))
                    break;
                else if (!strcmp(attributes[i].name, "XV_GREEN_INTENSITY")
                         && (!strcmp(name, "green_intensity")))
                    break;
                else if (!strcmp(attributes[i].name, "XV_BLUE_INTENSITY")
                         && (!strcmp(name, "blue_intensity")))
                    break;
                else if ((!strcmp(attributes[i].name, "XV_ITURBT_709") //NVIDIA
                          || !strcmp(attributes[i].name, "XV_COLORSPACE")) //ATI
                         && (!strcmp(name, "bt_709")))
                    break;
                atom = None;
                continue;
            }
        }
    }
    XFree(attributes);
    return atom;
}

static int xv_set_eq(struct vo *vo, uint32_t xv_port, const char *name,
                     int value)
{
    MP_VERBOSE(vo, "xv_set_eq called! (%s, %d)\n", name, value);

    int min, max;
    int atom = xv_find_atom(vo, xv_port, name, false, &min, &max);
    if (atom != None) {
        // -100 -> min
        //   0  -> (max+min)/2
        // +100 -> max
        int port_value = (value + 100) * (max - min) / 200 + min;
        XvSetPortAttribute(vo->x11->display, xv_port, atom, port_value);
        return VO_TRUE;
    }
    return VO_FALSE;
}

static int xv_get_eq(struct vo *vo, uint32_t xv_port, const char *name,
                     int *value)
{
    int min, max;
    int atom = xv_find_atom(vo, xv_port, name, true, &min, &max);
    if (atom != None) {
        int port_value = 0;
        XvGetPortAttribute(vo->x11->display, xv_port, atom, &port_value);

        *value = (port_value - min) * 200 / (max - min) - 100;
        MP_VERBOSE(vo, "xv_get_eq called! (%s, %d)\n", name, *value);
        return VO_TRUE;
    }
    return VO_FALSE;
}

static Atom xv_intern_atom_if_exists(struct vo *vo, char const *atom_name)
{
    struct xvctx *ctx = vo->priv;
    XvAttribute *attributes;
    int attrib_count, i;
    Atom xv_atom = None;

    attributes = XvQueryPortAttributes(vo->x11->display, ctx->xv_port,
                                       &attrib_count);
    if (attributes != NULL) {
        for (i = 0; i < attrib_count; ++i) {
            if (strcmp(attributes[i].name, atom_name) == 0) {
                xv_atom = XInternAtom(vo->x11->display, atom_name, False);
                break;
            }
        }
        XFree(attributes);
    }

    return xv_atom;
}

// Try to enable vsync for xv.
// Returns -1 if not available, 0 on failure and 1 on success.
static int xv_enable_vsync(struct vo *vo)
{
    struct xvctx *ctx = vo->priv;
    Atom xv_atom = xv_intern_atom_if_exists(vo, "XV_SYNC_TO_VBLANK");
    if (xv_atom == None)
        return -1;
    return XvSetPortAttribute(vo->x11->display, ctx->xv_port, xv_atom, 1)
           == Success;
}

// Get maximum supported source image dimensions.
// If querying the dimensions fails, don't change *width and *height.
static void xv_get_max_img_dim(struct vo *vo, uint32_t *width, uint32_t *height)
{
    struct xvctx *ctx = vo->priv;
    XvEncodingInfo *encodings;
    unsigned int num_encodings, idx;

    XvQueryEncodings(vo->x11->display, ctx->xv_port, &num_encodings, &encodings);

    if (encodings) {
        for (idx = 0; idx < num_encodings; ++idx) {
            if (strcmp(encodings[idx].name, "XV_IMAGE") == 0) {
                *width  = encodings[idx].width;
                *height = encodings[idx].height;
                break;
            }
        }
    }

    MP_VERBOSE(vo, "Maximum source image dimensions: %ux%u\n", *width, *height);

    XvFreeEncodingInfo(encodings);
}

static void xv_print_ck_info(struct vo *vo)
{
    struct xvctx *xv = vo->priv;

    switch (xv->xv_ck_info.method) {
    case CK_METHOD_NONE:
        MP_VERBOSE(vo, "Drawing no colorkey.\n");
        return;
    case CK_METHOD_AUTOPAINT:
        MP_VERBOSE(vo, "Colorkey is drawn by Xv.\n");
        break;
    case CK_METHOD_MANUALFILL:
        MP_VERBOSE(vo, "Drawing colorkey manually.\n");
        break;
    case CK_METHOD_BACKGROUND:
        MP_VERBOSE(vo, "Colorkey is drawn as window background.\n");
        break;
    }

    switch (xv->xv_ck_info.source) {
    case CK_SRC_CUR:
        MP_VERBOSE(vo, "Using colorkey from Xv (0x%06lx).\n", xv->xv_colorkey);
        break;
    case CK_SRC_USE:
        if (xv->xv_ck_info.method == CK_METHOD_AUTOPAINT) {
            MP_VERBOSE(vo, "Ignoring colorkey from mpv (0x%06lx).\n",
                       xv->xv_colorkey);
        } else {
            MP_VERBOSE(vo, "Using colorkey from mpv (0x%06lx). Use -colorkey to change.\n",
                       xv->xv_colorkey);
        }
        break;
    case CK_SRC_SET:
        MP_VERBOSE(vo, "Setting and using colorkey from mpv (0x%06lx)."
                   " Use -colorkey to change.\n", xv->xv_colorkey);
        break;
    }
}

/* NOTE: If vo.colorkey has bits set after the first 3 low order bytes
 *       we don't draw anything as this means it was forced to off. */
static int xv_init_colorkey(struct vo *vo)
{
    struct xvctx *ctx = vo->priv;
    Display *display = vo->x11->display;
    Atom xv_atom;
    int rez;

    /* check if colorkeying is needed */
    xv_atom = xv_intern_atom_if_exists(vo, "XV_COLORKEY");
    if (xv_atom != None && ctx->xv_ck_info.method != CK_METHOD_NONE) {
        if (ctx->xv_ck_info.source == CK_SRC_CUR) {
            int colorkey_ret;

            rez = XvGetPortAttribute(display, ctx->xv_port, xv_atom,
                                     &colorkey_ret);
            if (rez == Success)
                ctx->xv_colorkey = colorkey_ret;
            else {
                MP_FATAL(vo, "Couldn't get colorkey! "
                         "Maybe the selected Xv port has no overlay.\n");
                return 0; // error getting colorkey
            }
        } else {
            ctx->xv_colorkey = ctx->colorkey;

            /* check if we have to set the colorkey too */
            if (ctx->xv_ck_info.source == CK_SRC_SET) {
                xv_atom = XInternAtom(display, "XV_COLORKEY", False);

                rez = XvSetPortAttribute(display, ctx->xv_port, xv_atom,
                                         ctx->colorkey);
                if (rez != Success) {
                    MP_FATAL(vo, "Couldn't set colorkey!\n");
                    return 0; // error setting colorkey
                }
            }
        }

        xv_atom = xv_intern_atom_if_exists(vo, "XV_AUTOPAINT_COLORKEY");

        /* should we draw the colorkey ourselves or activate autopainting? */
        if (ctx->xv_ck_info.method == CK_METHOD_AUTOPAINT) {
            rez = !Success;

            if (xv_atom != None) // autopaint is supported
                rez = XvSetPortAttribute(display, ctx->xv_port, xv_atom, 1);

            if (rez != Success)
                ctx->xv_ck_info.method = CK_METHOD_MANUALFILL;
        } else {
            // disable colorkey autopainting if supported
            if (xv_atom != None)
                XvSetPortAttribute(display, ctx->xv_port, xv_atom, 0);
        }
    } else { // do no colorkey drawing at all
        ctx->xv_ck_info.method = CK_METHOD_NONE;
        ctx->colorkey = 0xFF000000;
    }

    xv_print_ck_info(vo);

    return 1;
}

/* Draw the colorkey on the video window.
 *
 * Draws the colorkey depending on the set method ( colorkey_handling ).
 *
 * Also draws the black bars ( when the video doesn't fit the display in
 * fullscreen ) separately, so they don't overlap with the video area. */
static void xv_draw_colorkey(struct vo *vo, const struct mp_rect *rc)
{
    struct xvctx *ctx = vo->priv;
    struct vo_x11_state *x11 = vo->x11;
    if (ctx->xv_ck_info.method == CK_METHOD_MANUALFILL ||
        ctx->xv_ck_info.method == CK_METHOD_BACKGROUND)
    {
        if (!ctx->vo_gc)
            return;
        //less tearing than XClearWindow()
        XSetForeground(x11->display, ctx->vo_gc, ctx->xv_colorkey);
        XFillRectangle(x11->display, x11->window, ctx->vo_gc, rc->x0, rc->y0,
                       rc->x1 - rc->x0, rc->y1 - rc->y0);
    }
}

static void read_xv_csp(struct vo *vo)
{
    struct xvctx *ctx = vo->priv;
    ctx->cached_csp = 0;
    int bt709_enabled;
    if (xv_get_eq(vo, ctx->xv_port, "bt_709", &bt709_enabled))
        ctx->cached_csp = bt709_enabled == 100 ? MP_CSP_BT_709 : MP_CSP_BT_601;
}


static void fill_rect(struct vo *vo, GC gc, int x0, int y0, int x1, int y1)
{
    struct vo_x11_state *x11 = vo->x11;

    x0 = MPMAX(x0, 0);
    y0 = MPMAX(y0, 0);
    x1 = MPMIN(x1, vo->dwidth);
    y1 = MPMIN(y1, vo->dheight);

    if (x11->window && gc && x1 > x0 && y1 > y0)
        XFillRectangle(x11->display, x11->window, gc, x0, y0, x1 - x0, y1 - y0);
}

// Clear everything outside of rc with the background color
static void vo_x11_clear_background(struct vo *vo, const struct mp_rect *rc)
{
    struct vo_x11_state *x11 = vo->x11;
    struct xvctx *ctx = vo->priv;
    GC gc = ctx->f_gc;

    int w = vo->dwidth;
    int h = vo->dheight;

    fill_rect(vo, gc, 0,      0,      w,      rc->y0); // top
    fill_rect(vo, gc, 0,      rc->y1, w,      h);      // bottom
    fill_rect(vo, gc, 0,      rc->y0, rc->x0, rc->y1); // left
    fill_rect(vo, gc, rc->x1, rc->y0, w,      rc->y1); // right

    XFlush(x11->display);
}

static void resize(struct vo *vo)
{
    struct xvctx *ctx = vo->priv;

    // Can't be used, because the function calculates screen-space coordinates,
    // while we need video-space.
    struct mp_osd_res unused;

    vo_get_src_dst_rects(vo, &ctx->src_rect, &ctx->dst_rect, &unused);

    vo_x11_clear_background(vo, &ctx->dst_rect);
    xv_draw_colorkey(vo, &ctx->dst_rect);
    read_xv_csp(vo);

    mp_input_set_mouse_transform(vo->input_ctx, &ctx->dst_rect, &ctx->src_rect);

    vo->want_redraw = true;
}

/*
 * create and map window,
 * allocate colors and (shared) memory
 */
static int reconfig(struct vo *vo, struct mp_image_params *params)
{
    struct vo_x11_state *x11 = vo->x11;
    struct xvctx *ctx = vo->priv;
    int i;

    mp_image_unrefp(&ctx->original_image);

    ctx->image_height = params->h;
    ctx->image_width  = params->w;
    ctx->image_format = params->imgfmt;

    if ((ctx->max_width != 0 && ctx->max_height != 0)
        && (ctx->image_width > ctx->max_width
            || ctx->image_height > ctx->max_height)) {
        MP_ERR(vo, "Source image dimensions are too high: %ux%u (maximum is %ux%u)\n",
               ctx->image_width, ctx->image_height, ctx->max_width,
               ctx->max_height);
        return -1;
    }

    /* check image formats */
    ctx->xv_format = 0;
    for (i = 0; i < ctx->formats; i++) {
        MP_VERBOSE(vo, "Xvideo image format: 0x%x (%4.4s) %s\n",
                   ctx->fo[i].id, (char *) &ctx->fo[i].id,
                   (ctx->fo[i].format == XvPacked) ? "packed" : "planar");
        if (ctx->fo[i].id == find_xv_format(ctx->image_format))
            ctx->xv_format = ctx->fo[i].id;
    }
    if (!ctx->xv_format)
        return -1;

    vo_x11_config_vo_window(vo);

    if (!ctx->f_gc && !ctx->vo_gc) {
        ctx->f_gc = XCreateGC(x11->display, x11->window, 0, 0);
        ctx->vo_gc = XCreateGC(x11->display, x11->window, 0, NULL);
        XSetForeground(x11->display, ctx->f_gc, 0);
    }

    if (ctx->xv_ck_info.method == CK_METHOD_BACKGROUND)
        XSetWindowBackground(x11->display, x11->window, ctx->xv_colorkey);

    MP_VERBOSE(vo, "using Xvideo port %d for hw scaling\n", ctx->xv_port);

    // In case config has been called before
    for (i = 0; i < ctx->num_buffers; i++)
        deallocate_xvimage(vo, i);

    ctx->num_buffers = ctx->cfg_buffers;

    for (i = 0; i < ctx->num_buffers; i++) {
        if (!allocate_xvimage(vo, i)) {
            MP_FATAL(vo, "could not allocate Xv image data\n");
            return -1;
        }
    }

    ctx->current_buf = 0;
    ctx->current_ip_buf = 0;

    int is_709 = params->color.space == MP_CSP_BT_709;
    xv_set_eq(vo, ctx->xv_port, "bt_709", is_709 * 200 - 100);
    read_xv_csp(vo);

    resize(vo);

    return 0;
}

static bool allocate_xvimage(struct vo *vo, int foo)
{
    struct xvctx *ctx = vo->priv;
    struct vo_x11_state *x11 = vo->x11;
    // align it for faster OSD rendering (draw_bmp.c swscale usage)
    int aligned_w = FFALIGN(ctx->image_width, 32);
    // round up the height to next chroma boundary too
    int aligned_h = FFALIGN(ctx->image_height, 2);
    if (x11->display_is_local && XShmQueryExtension(x11->display)) {
        ctx->Shmem_Flag = 1;
        x11->ShmCompletionEvent = XShmGetEventBase(x11->display)
                                + ShmCompletion;
    } else {
        ctx->Shmem_Flag = 0;
        MP_INFO(vo, "Shared memory not supported\nReverting to normal Xv.\n");
    }
    if (ctx->Shmem_Flag) {
        ctx->xvimage[foo] =
            (XvImage *) XvShmCreateImage(x11->display, ctx->xv_port,
                                         ctx->xv_format, NULL,
                                         aligned_w, aligned_h,
                                         &ctx->Shminfo[foo]);
        if (!ctx->xvimage[foo])
            return false;

        ctx->Shminfo[foo].shmid = shmget(IPC_PRIVATE,
                                         ctx->xvimage[foo]->data_size,
                                         IPC_CREAT | 0777);
        ctx->Shminfo[foo].shmaddr = shmat(ctx->Shminfo[foo].shmid, 0, 0);
        if (ctx->Shminfo[foo].shmaddr == (void *)-1)
            return false;
        ctx->Shminfo[foo].readOnly = False;

        ctx->xvimage[foo]->data = ctx->Shminfo[foo].shmaddr;
        XShmAttach(x11->display, &ctx->Shminfo[foo]);
        XSync(x11->display, False);
        shmctl(ctx->Shminfo[foo].shmid, IPC_RMID, 0);
    } else {
        ctx->xvimage[foo] =
            (XvImage *) XvCreateImage(x11->display, ctx->xv_port,
                                      ctx->xv_format, NULL, aligned_w,
                                      aligned_h);
        if (!ctx->xvimage[foo])
            return false;
        ctx->xvimage[foo]->data = av_malloc(ctx->xvimage[foo]->data_size);
        if (!ctx->xvimage[foo]->data)
            return false;
        XSync(x11->display, False);
    }

    if ((ctx->xvimage[foo]->width < aligned_w) ||
        (ctx->xvimage[foo]->height < aligned_h)) {
        MP_ERR(vo, "Got XvImage with too small size: %ux%u (expected %ux%u)\n",
               ctx->xvimage[foo]->width, ctx->xvimage[foo]->height,
               aligned_w, ctx->image_height);
        return false;
    }

    struct mp_image img = get_xv_buffer(vo, foo);
    mp_image_set_size(&img, aligned_w, aligned_h);
    mp_image_clear(&img, 0, 0, img.w, img.h);
    return true;
}

static void deallocate_xvimage(struct vo *vo, int foo)
{
    struct xvctx *ctx = vo->priv;
    if (ctx->Shmem_Flag) {
        XShmDetach(vo->x11->display, &ctx->Shminfo[foo]);
        shmdt(ctx->Shminfo[foo].shmaddr);
    } else {
        av_free(ctx->xvimage[foo]->data);
    }
    if (ctx->xvimage[foo])
        XFree(ctx->xvimage[foo]);

    ctx->xvimage[foo] = NULL;
    ctx->Shminfo[foo] = (XShmSegmentInfo){0};

    XSync(vo->x11->display, False);
    return;
}

static inline void put_xvimage(struct vo *vo, XvImage *xvi)
{
    struct xvctx *ctx = vo->priv;
    struct vo_x11_state *x11 = vo->x11;
    struct mp_rect *src = &ctx->src_rect;
    struct mp_rect *dst = &ctx->dst_rect;
    int dw = dst->x1 - dst->x0, dh = dst->y1 - dst->y0;
    int sw = src->x1 - src->x0, sh = src->y1 - src->y0;

    if (ctx->Shmem_Flag) {
        XvShmPutImage(x11->display, ctx->xv_port, x11->window, ctx->vo_gc, xvi,
                      src->x0, src->y0, sw, sh,
                      dst->x0, dst->y0, dw, dh,
                      True);
        x11->ShmCompletionWaitCount++;
    } else {
        XvPutImage(x11->display, ctx->xv_port, x11->window, ctx->vo_gc, xvi,
                   src->x0, src->y0, sw, sh,
                   dst->x0, dst->y0, dw, dh);
    }
}

static struct mp_image get_xv_buffer(struct vo *vo, int buf_index)
{
    struct xvctx *ctx = vo->priv;
    XvImage *xv_image = ctx->xvimage[buf_index];

    struct mp_image img = {0};
    mp_image_set_size(&img, ctx->image_width, ctx->image_height);
    mp_image_setfmt(&img, ctx->image_format);

    bool swapuv = ctx->xv_format == MP_FOURCC_YV12;
    for (int n = 0; n < img.num_planes; n++) {
        int sn = n > 0 &&  swapuv ? (n == 1 ? 2 : 1) : n;
        img.planes[n] = xv_image->data + xv_image->offsets[sn];
        img.stride[n] = xv_image->pitches[sn];
    }

    if (vo->params) {
        struct mp_image_params params = *vo->params;
        if (ctx->cached_csp)
            params.color.space = ctx->cached_csp;
        mp_image_set_attributes(&img, &params);
    }

    return img;
}

static void wait_for_completion(struct vo *vo, int max_outstanding)
{
    struct xvctx *ctx = vo->priv;
    struct vo_x11_state *x11 = vo->x11;
    if (ctx->Shmem_Flag) {
        while (x11->ShmCompletionWaitCount > max_outstanding) {
            if (!ctx->Shm_Warned_Slow) {
                MP_WARN(vo, "X11 can't keep up! Waiting"
                        " for XShm completion events...\n");
                ctx->Shm_Warned_Slow = 1;
            }
            mp_sleep_us(1000);
            vo_x11_check_events(vo);
        }
    }
}

static void flip_page(struct vo *vo)
{
    struct xvctx *ctx = vo->priv;
    put_xvimage(vo, ctx->xvimage[ctx->current_buf]);

    /* remember the currently visible buffer */
    ctx->current_buf = (ctx->current_buf + 1) % ctx->num_buffers;

    if (!ctx->Shmem_Flag)
        XSync(vo->x11->display, False);
}

// Note: REDRAW_FRAME can call this with NULL.
static void draw_image(struct vo *vo, mp_image_t *mpi)
{
    struct xvctx *ctx = vo->priv;

    wait_for_completion(vo, ctx->num_buffers - 1);

    struct mp_image xv_buffer = get_xv_buffer(vo, ctx->current_buf);
    if (mpi) {
        mp_image_copy(&xv_buffer, mpi);
    } else {
        mp_image_clear(&xv_buffer, 0, 0, xv_buffer.w, xv_buffer.h);
    }

    struct mp_osd_res res = osd_res_from_image_params(vo->params);
    osd_draw_on_image(vo->osd, res, mpi ? mpi->pts : 0, 0, &xv_buffer);

    if (mpi != ctx->original_image) {
        talloc_free(ctx->original_image);
        ctx->original_image = mpi;
    }
}

static int query_format(struct vo *vo, int format)
{
    struct xvctx *ctx = vo->priv;
    uint32_t i;

    int fourcc = find_xv_format(format);
    if (fourcc) {
        for (i = 0; i < ctx->formats; i++) {
            if (ctx->fo[i].id == fourcc)
                return 1;
        }
    }
    return 0;
}

static void uninit(struct vo *vo)
{
    struct xvctx *ctx = vo->priv;
    int i;

    talloc_free(ctx->original_image);

    if (ctx->ai)
        XvFreeAdaptorInfo(ctx->ai);
    ctx->ai = NULL;
    if (ctx->fo) {
        XFree(ctx->fo);
        ctx->fo = NULL;
    }
    for (i = 0; i < ctx->num_buffers; i++)
        deallocate_xvimage(vo, i);
    if (ctx->f_gc != None)
        XFreeGC(vo->x11->display, ctx->f_gc);
    if (ctx->vo_gc != None)
        XFreeGC(vo->x11->display, ctx->vo_gc);
    // uninit() shouldn't get called unless initialization went past vo_init()
    vo_x11_uninit(vo);
}

static int preinit(struct vo *vo)
{
    XvPortID xv_p;
    int busy_ports = 0;
    unsigned int i;
    struct xvctx *ctx = vo->priv;
    int xv_adaptor = ctx->cfg_xv_adaptor;

    if (!vo_x11_init(vo))
        return -1;

    if (!vo_x11_create_vo_window(vo, NULL, "xv"))
        goto error;

    struct vo_x11_state *x11 = vo->x11;

    /* check for Xvideo extension */
    unsigned int ver, rel, req, ev, err;
    if (Success != XvQueryExtension(x11->display, &ver, &rel, &req, &ev, &err)) {
        MP_ERR(vo, "Xv not supported by this X11 version/driver\n");
        goto error;
    }

    /* check for Xvideo support */
    if (Success !=
        XvQueryAdaptors(x11->display, DefaultRootWindow(x11->display),
                        &ctx->adaptors, &ctx->ai)) {
        MP_ERR(vo, "XvQueryAdaptors failed.\n");
        goto error;
    }

    /* check adaptors */
    if (ctx->xv_port) {
        int port_found;

        for (port_found = 0, i = 0; !port_found && i < ctx->adaptors; i++) {
            if ((ctx->ai[i].type & XvInputMask)
                && (ctx->ai[i].type & XvImageMask)) {
                for (xv_p = ctx->ai[i].base_id;
                     xv_p < ctx->ai[i].base_id + ctx->ai[i].num_ports;
                     ++xv_p) {
                    if (xv_p == ctx->xv_port) {
                        port_found = 1;
                        break;
                    }
                }
            }
        }
        if (port_found) {
            if (XvGrabPort(x11->display, ctx->xv_port, CurrentTime))
                ctx->xv_port = 0;
        } else {
            MP_WARN(vo, "Invalid port parameter, overriding with port 0.\n");
            ctx->xv_port = 0;
        }
    }

    for (i = 0; i < ctx->adaptors && ctx->xv_port == 0; i++) {
        /* check if adaptor number has been specified */
        if (xv_adaptor != -1 && xv_adaptor != i)
            continue;

        if ((ctx->ai[i].type & XvInputMask) && (ctx->ai[i].type & XvImageMask)) {
            for (xv_p = ctx->ai[i].base_id;
                 xv_p < ctx->ai[i].base_id + ctx->ai[i].num_ports; ++xv_p)
                if (!XvGrabPort(x11->display, xv_p, CurrentTime)) {
                    ctx->xv_port = xv_p;
                    MP_VERBOSE(vo, "Using Xv Adapter #%d (%s)\n",
                               i, ctx->ai[i].name);
                    break;
                } else {
                    MP_WARN(vo, "Could not grab port %i.\n", (int) xv_p);
                    ++busy_ports;
                }
        }
    }
    if (!ctx->xv_port) {
        if (busy_ports)
            MP_ERR(vo, "Xvideo ports busy.\n");
        else
            MP_ERR(vo, "No Xvideo support found.\n");
        goto error;
    }

    if (!xv_init_colorkey(vo)) {
        goto error;             // bail out, colorkey setup failed
    }
    xv_enable_vsync(vo);
    xv_get_max_img_dim(vo, &ctx->max_width, &ctx->max_height);

    ctx->fo = XvListImageFormats(x11->display, ctx->xv_port,
                                 (int *) &ctx->formats);

    MP_WARN(vo, "Warning: this legacy VO has bad quality and performance, "
                "and will in particular result in blurry OSD and subtitles. "
                "You should fix your graphics drivers, or not force the xv VO.\n");
    return 0;

  error:
    uninit(vo);                 // free resources
    return -1;
}

static int control(struct vo *vo, uint32_t request, void *data)
{
    struct xvctx *ctx = vo->priv;
    switch (request) {
    case VOCTRL_SET_PANSCAN:
        resize(vo);
        return VO_TRUE;
    case VOCTRL_REDRAW_FRAME:
        draw_image(vo, ctx->original_image);
        return true;
    }
    int events = 0;
    int r = vo_x11_control(vo, &events, request, data);
    if (events & (VO_EVENT_EXPOSE | VO_EVENT_RESIZE))
        resize(vo);
    vo_event(vo, events);
    return r;
}

#define OPT_BASE_STRUCT struct xvctx

const struct vo_driver video_out_xv = {
    .description = "X11/Xv",
    .name = "xv",
    .preinit = preinit,
    .query_format = query_format,
    .reconfig = reconfig,
    .control = control,
    .draw_image = draw_image,
    .flip_page = flip_page,
    .wakeup = vo_x11_wakeup,
    .wait_events = vo_x11_wait_events,
    .uninit = uninit,
    .priv_size = sizeof(struct xvctx),
    .priv_defaults = &(const struct xvctx) {
        .cfg_xv_adaptor = -1,
        .xv_ck_info = {CK_METHOD_MANUALFILL, CK_SRC_CUR},
        .colorkey = 0x0000ff00, // default colorkey is green
                    // (0xff000000 means that colorkey has been disabled)
        .cfg_buffers = 2,
    },
    .options = (const struct m_option[]) {
        OPT_INT("port", xv_port, M_OPT_MIN, .min = 0),
        OPT_INT("adaptor", cfg_xv_adaptor, M_OPT_MIN, .min = -1),
        OPT_CHOICE("ck", xv_ck_info.source, 0,
                   ({"use", CK_SRC_USE},
                    {"set", CK_SRC_SET},
                    {"cur", CK_SRC_CUR})),
        OPT_CHOICE("ck-method", xv_ck_info.method, 0,
                   ({"none", CK_METHOD_NONE},
                    {"bg", CK_METHOD_BACKGROUND},
                    {"man", CK_METHOD_MANUALFILL},
                    {"auto", CK_METHOD_AUTOPAINT})),
        OPT_INT("colorkey", colorkey, 0),
        OPT_INTRANGE("buffers", cfg_buffers, 0, 1, MAX_BUFFERS),
        OPT_REMOVED("no-colorkey", "use ck-method=none instead"),
        {0}
    },
    .options_prefix = "xv",
};