summaryrefslogtreecommitdiffstats
path: root/video/out/vo_rpi.c
blob: 2065151b1d376f30d34dcec54a883ce85dd91456 (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
/*
 * This file is part of mpv.
 *
 * mpv is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <stdbool.h>
#include <assert.h>

#include <bcm_host.h>
#include <interface/mmal/mmal.h>
#include <interface/mmal/util/mmal_util.h>
#include <interface/mmal/util/mmal_default_components.h>
#include <interface/mmal/vc/mmal_vc_api.h>

#include <EGL/egl.h>
#include <EGL/eglext.h>

#include <libavutil/rational.h>

#include "common/common.h"
#include "common/msg.h"
#include "opengl/common.h"
#include "options/m_config.h"
#include "osdep/timer.h"
#include "vo.h"
#include "win_state.h"
#include "video/mp_image.h"
#include "sub/osd.h"

#include "opengl/ra_gl.h"
#include "gpu/video.h"

struct mp_egl_rpi {
    struct mp_log *log;
    struct GL *gl;
    struct ra *ra;
    EGLDisplay egl_display;
    EGLConfig egl_config;
    EGLContext egl_context;
    EGLSurface egl_surface;
    // yep, the API keeps a pointer to it
    EGL_DISPMANX_WINDOW_T egl_window;
};

struct priv {
    DISPMANX_DISPLAY_HANDLE_T display;
    DISPMANX_ELEMENT_HANDLE_T window;
    DISPMANX_ELEMENT_HANDLE_T osd_overlay;
    DISPMANX_UPDATE_HANDLE_T update;
    uint32_t w, h;
    uint32_t x, y;
    double display_fps;

    double osd_pts;
    struct mp_osd_res osd_res;

    struct mp_egl_rpi egl;
    struct gl_video *gl_video;
    struct mpgl_osd *osd;

    MMAL_COMPONENT_T *renderer;
    bool renderer_enabled;

    bool display_synced, skip_osd;
    struct mp_image *next_image;

    // for RAM input
    MMAL_POOL_T *swpool;

    pthread_mutex_t display_mutex;
    pthread_cond_t display_cond;
    int64_t vsync_counter;
    bool reload_display;

    int background_layer;
    int video_layer;
    int osd_layer;

    int display_nr;
    int layer;
    int background;
    int enable_osd;
};

// Magic alignments (in pixels) expected by the MMAL internals.
#define ALIGN_W 32
#define ALIGN_H 16

static void recreate_renderer(struct vo *vo);

static void *get_proc_address(const GLubyte *name)
{
    void *p = eglGetProcAddress(name);
    // EGL 1.4 (supported by the RPI firmware) does not necessarily return
    // function pointers for core functions.
    if (!p) {
        void *h = dlopen("/opt/vc/lib/libGLESv2.so", RTLD_LAZY);
        if (h) {
            p = dlsym(h, name);
            dlclose(h);
        }
    }
    return p;
}

static EGLConfig select_fb_config_egl(struct mp_egl_rpi *p)
{
    EGLint attributes[] = {
        EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
        EGL_RED_SIZE, 8,
        EGL_GREEN_SIZE, 8,
        EGL_BLUE_SIZE, 8,
        EGL_DEPTH_SIZE, 0,
        EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
        EGL_NONE
    };

    EGLint config_count;
    EGLConfig config;

    eglChooseConfig(p->egl_display, attributes, &config, 1, &config_count);

    if (!config_count) {
        MP_FATAL(p, "Could find EGL configuration!\n");
        return NULL;
    }

    return config;
}

static void mp_egl_rpi_destroy(struct mp_egl_rpi *p)
{
    if (p->egl_display) {
        eglMakeCurrent(p->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
                       EGL_NO_CONTEXT);
    }
    if (p->egl_surface)
        eglDestroySurface(p->egl_display, p->egl_surface);
    if (p->egl_context)
        eglDestroyContext(p->egl_display, p->egl_context);
    p->egl_context = EGL_NO_CONTEXT;
    eglReleaseThread();
    p->egl_display = EGL_NO_DISPLAY;
    talloc_free(p->gl);
    p->gl = NULL;
}

static int mp_egl_rpi_init(struct mp_egl_rpi *p, DISPMANX_ELEMENT_HANDLE_T window,
                    int w, int h)
{
    p->egl_display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
    if (!eglInitialize(p->egl_display, NULL, NULL)) {
        MP_FATAL(p, "EGL failed to initialize.\n");
        goto fail;
    }

    eglBindAPI(EGL_OPENGL_ES_API);

    EGLConfig config = select_fb_config_egl(p);
    if (!config)
        goto fail;

    p->egl_window = (EGL_DISPMANX_WINDOW_T){
        .element = window,
        .width = w,
        .height = h,
    };
    p->egl_surface = eglCreateWindowSurface(p->egl_display, config,
                                            &p->egl_window, NULL);

    if (p->egl_surface == EGL_NO_SURFACE) {
        MP_FATAL(p, "Could not create EGL surface!\n");
        goto fail;
    }

    EGLint context_attributes[] = {
        EGL_CONTEXT_CLIENT_VERSION, 2,
        EGL_NONE
    };
    p->egl_context = eglCreateContext(p->egl_display, config,
                                      EGL_NO_CONTEXT, context_attributes);

    if (p->egl_context == EGL_NO_CONTEXT) {
        MP_FATAL(p, "Could not create EGL context!\n");
        goto fail;
    }

    eglMakeCurrent(p->egl_display, p->egl_surface, p->egl_surface,
                   p->egl_context);

    p->gl = talloc_zero(NULL, struct GL);

    const char *exts = eglQueryString(p->egl_display, EGL_EXTENSIONS);
    mpgl_load_functions(p->gl, get_proc_address, exts, p->log);

    if (!p->gl->version && !p->gl->es)
        goto fail;

    p->ra = ra_create_gl(p->gl, p->log);
    if (!p->ra)
        goto fail;

    return 0;

fail:
    mp_egl_rpi_destroy(p);
    return -1;
}

// Make mpi point to buffer, assuming MMAL_ENCODING_I420.
// buffer can be NULL.
// Return the required buffer space.
static size_t layout_buffer(struct mp_image *mpi, MMAL_BUFFER_HEADER_T *buffer,
                            struct mp_image_params *params)
{
    assert(params->imgfmt == IMGFMT_420P);
    mp_image_set_params(mpi, params);
    int w = MP_ALIGN_UP(params->w, ALIGN_W);
    int h = MP_ALIGN_UP(params->h, ALIGN_H);
    uint8_t *cur = buffer ? buffer->data : NULL;
    size_t size = 0;
    for (int i = 0; i < 3; i++) {
        int div = i ? 2 : 1;
        mpi->planes[i] = cur;
        mpi->stride[i] = w / div;
        size_t plane_size = h / div * mpi->stride[i];
        if (cur)
            cur += plane_size;
        size += plane_size;
    }
    return size;
}

static void update_osd(struct vo *vo)
{
    struct priv *p = vo->priv;
    if (!p->enable_osd)
        return;

    if (!gl_video_check_osd_change(p->gl_video, &p->osd_res, p->osd_pts)) {
        p->skip_osd = true;
        return;
    }

    MP_STATS(vo, "start rpi_osd");

    struct vo_frame frame = {0};
    struct ra_fbo target = {
        .tex = ra_create_wrapped_fb(p->egl.ra, 0, p->osd_res.w, p->osd_res.h),
        .flip = true,
    };
    gl_video_set_osd_pts(p->gl_video, p->osd_pts);
    gl_video_render_frame(p->gl_video, &frame, target, RENDER_FRAME_DEF);
    ra_tex_free(p->egl.ra, &target.tex);

    MP_STATS(vo, "stop rpi_osd");
}

static void resize(struct vo *vo)
{
    struct priv *p = vo->priv;
    MMAL_PORT_T *input = p->renderer->input[0];

    struct mp_rect src, dst;

    vo_get_src_dst_rects(vo, &src, &dst, &p->osd_res);

    int rotate[] = {MMAL_DISPLAY_ROT0,
                    MMAL_DISPLAY_ROT90,
                    MMAL_DISPLAY_ROT180,
                    MMAL_DISPLAY_ROT270};


    int src_w = src.x1 - src.x0, src_h = src.y1 - src.y0,
        dst_w = dst.x1 - dst.x0, dst_h = dst.y1 - dst.y0;
    int p_x, p_y;
    av_reduce(&p_x, &p_y, dst_w * src_h, src_w * dst_h, 16000);
    MMAL_DISPLAYREGION_T dr = {
        .hdr = { .id = MMAL_PARAMETER_DISPLAYREGION,
                 .size = sizeof(MMAL_DISPLAYREGION_T), },
        .src_rect = { .x = src.x0, .y = src.y0, .width = src_w, .height = src_h },
        .dest_rect = { .x = dst.x0 + p->x, .y = dst.y0 + p->y,
                       .width = dst_w, .height = dst_h },
        .layer = p->video_layer,
        .display_num = p->display_nr,
        .pixel_x = p_x,
        .pixel_y = p_y,
        .transform = rotate[vo->params ? vo->params->rotate / 90 : 0],
        .fullscreen = vo->opts->fullscreen,
        .set = MMAL_DISPLAY_SET_SRC_RECT | MMAL_DISPLAY_SET_DEST_RECT |
               MMAL_DISPLAY_SET_LAYER | MMAL_DISPLAY_SET_NUM |
               MMAL_DISPLAY_SET_PIXEL | MMAL_DISPLAY_SET_TRANSFORM |
               MMAL_DISPLAY_SET_FULLSCREEN,
    };

    if (vo->params && (vo->params->rotate % 180) == 90) {
        MPSWAP(int, dr.src_rect.x, dr.src_rect.y);
        MPSWAP(int, dr.src_rect.width, dr.src_rect.height);
    }

    if (mmal_port_parameter_set(input, &dr.hdr))
        MP_WARN(vo, "could not set video rectangle\n");

    if (p->gl_video)
        gl_video_resize(p->gl_video, &src, &dst, &p->osd_res);
}

static void destroy_overlays(struct vo *vo)
{
    struct priv *p = vo->priv;

    if (p->window)
        vc_dispmanx_element_remove(p->update, p->window);
    p->window = 0;

    gl_video_uninit(p->gl_video);
    p->gl_video = NULL;
    ra_free(&p->egl.ra);
    mp_egl_rpi_destroy(&p->egl);

    if (p->osd_overlay)
        vc_dispmanx_element_remove(p->update, p->osd_overlay);
    p->osd_overlay = 0;
}

static int update_display_size(struct vo *vo)
{
    struct priv *p = vo->priv;

    uint32_t n_w = 0, n_h = 0;
    if (graphics_get_display_size(0, &n_w, &n_h) < 0) {
        MP_FATAL(vo, "Could not get display size.\n");
        return -1;
    }

    if (p->w == n_w && p->h == n_h)
        return 0;

    p->w = n_w;
    p->h = n_h;

    MP_VERBOSE(vo, "Display size: %dx%d\n", p->w, p->h);

    return 0;
}

static int create_overlays(struct vo *vo)
{
    struct priv *p = vo->priv;
    destroy_overlays(vo);

    if (!p->display)
        return -1;

    if (vo->opts->fullscreen && p->background) {
        // Use the whole screen.
        VC_RECT_T dst = {.width = p->w, .height = p->h};
        VC_RECT_T src = {.width = 1 << 16, .height = 1 << 16};
        VC_DISPMANX_ALPHA_T alpha = {
            .flags = DISPMANX_FLAGS_ALPHA_FIXED_ALL_PIXELS,
            .opacity = 0xFF,
        };

        p->window = vc_dispmanx_element_add(p->update, p->display,
                                            p->background_layer,
                                            &dst, 0, &src,
                                            DISPMANX_PROTECTION_NONE,
                                            &alpha, 0, 0);
        if (!p->window) {
            MP_FATAL(vo, "Could not add DISPMANX element.\n");
            return -1;
        }
    }

    if (p->enable_osd) {
        VC_RECT_T dst = {.x = p->x, .y = p->y,
                         .width = p->osd_res.w, .height = p->osd_res.h};
        VC_RECT_T src = {.width = p->osd_res.w << 16, .height = p->osd_res.h << 16};
        VC_DISPMANX_ALPHA_T alpha = {
            .flags = DISPMANX_FLAGS_ALPHA_FROM_SOURCE,
            .opacity = 0xFF,
        };
        p->osd_overlay = vc_dispmanx_element_add(p->update, p->display,
                                                 p->osd_layer,
                                                 &dst, 0, &src,
                                                 DISPMANX_PROTECTION_NONE,
                                                 &alpha, 0, 0);
        if (!p->osd_overlay) {
            MP_FATAL(vo, "Could not add DISPMANX element.\n");
            return -1;
        }

        if (mp_egl_rpi_init(&p->egl, p->osd_overlay,
                            p->osd_res.w, p->osd_res.h) < 0)
        {
            MP_FATAL(vo, "EGL/GLES initialization for OSD renderer failed.\n");
            return -1;
        }
        p->gl_video = gl_video_init(p->egl.ra, vo->log, vo->global);
        gl_video_set_clear_color(p->gl_video, (struct m_color){.a = 0});
        gl_video_set_osd_source(p->gl_video, vo->osd);
    }

    p->display_fps = 0;
    TV_GET_STATE_RESP_T tvstate;
    TV_DISPLAY_STATE_T tvstate_disp;
    if (!vc_tv_get_state(&tvstate) && !vc_tv_get_display_state(&tvstate_disp)) {
        if (tvstate_disp.state & (VC_HDMI_HDMI | VC_HDMI_DVI)) {
            p->display_fps = tvstate_disp.display.hdmi.frame_rate;

            HDMI_PROPERTY_PARAM_T param = {
                .property = HDMI_PROPERTY_PIXEL_CLOCK_TYPE,
            };
            if (!vc_tv_hdmi_get_property(&param) &&
                param.param1 == HDMI_PIXEL_CLOCK_TYPE_NTSC)
                p->display_fps = p->display_fps / 1.001;
        } else {
            p->display_fps = tvstate_disp.display.sdtv.frame_rate;
        }
    }

    resize(vo);

    vo_event(vo, VO_EVENT_WIN_STATE);

    vc_dispmanx_update_submit_sync(p->update);
    p->update = vc_dispmanx_update_start(10);

    return 0;
}

static int set_geometry(struct vo *vo)
{
    struct priv *p = vo->priv;

    if (vo->opts->fullscreen) {
        vo->dwidth = p->w;
        vo->dheight = p->h;
        p->x = p->y = 0;
    } else {
        struct vo_win_geometry geo;
        struct mp_rect screenrc = {0, 0, p->w, p->h};

        vo_calc_window_geometry(vo, &screenrc, &geo);
        vo_apply_window_geometry(vo, &geo);

        p->x = geo.win.x0;
        p->y = geo.win.y0;
    }

    resize(vo);

    if (create_overlays(vo) < 0)
        return -1;

    return 0;
}

static void wait_next_vsync(struct vo *vo)
{
    struct priv *p = vo->priv;
    pthread_mutex_lock(&p->display_mutex);
    struct timespec end = mp_rel_time_to_timespec(0.050);
    int64_t old = p->vsync_counter;
    while (old == p->vsync_counter && !p->reload_display) {
        if (pthread_cond_timedwait(&p->display_cond, &p->display_mutex, &end))
            break;
    }
    pthread_mutex_unlock(&p->display_mutex);
}

static void flip_page(struct vo *vo)
{
    struct priv *p = vo->priv;

    if (!p->renderer_enabled)
        return;

    struct mp_image *mpi = p->next_image;
    p->next_image = NULL;

    // For OSD
    if (!p->skip_osd && p->egl.gl)
        eglSwapBuffers(p->egl.egl_display, p->egl.egl_surface);
    p->skip_osd = false;

    if (mpi) {
        MMAL_PORT_T *input = p->renderer->input[0];
        MMAL_BUFFER_HEADER_T *ref = (void *)mpi->planes[3];

        // Assume this field is free for use by us.
        ref->user_data = mpi;

        if (mmal_port_send_buffer(input, ref)) {
            MP_ERR(vo, "could not queue picture!\n");
            talloc_free(mpi);
        }
    }

    if (p->display_synced)
        wait_next_vsync(vo);
}

static void free_mmal_buffer(void *arg)
{
    MMAL_BUFFER_HEADER_T *buffer = arg;
    mmal_buffer_header_release(buffer);
}

static void draw_frame(struct vo *vo, struct vo_frame *frame)
{
    struct priv *p = vo->priv;

    if (!p->renderer_enabled)
        return;

    mp_image_t *mpi = NULL;
    if (!frame->redraw && !frame->repeat)
        mpi = mp_image_new_ref(frame->current);

    talloc_free(p->next_image);
    p->next_image = NULL;

    if (mpi)
        p->osd_pts = mpi->pts;

    // Redraw only if the OSD has meaningfully changed, which we assume it
    // hasn't when a frame is merely repeated for display sync.
    p->skip_osd = !frame->redraw && frame->repeat;

    if (!p->skip_osd && p->egl.gl)
        update_osd(vo);

    p->display_synced = frame->display_synced;

    if (mpi && mpi->imgfmt != IMGFMT_MMAL) {
        MMAL_BUFFER_HEADER_T *buffer = mmal_queue_wait(p->swpool->queue);
        if (!buffer) {
            talloc_free(mpi);
            MP_ERR(vo, "Can't allocate buffer.\n");
            return;
        }
        mmal_buffer_header_reset(buffer);

        struct mp_image *new_ref = mp_image_new_custom_ref(NULL, buffer,
                                                           free_mmal_buffer);
        if (!new_ref) {
            mmal_buffer_header_release(buffer);
            talloc_free(mpi);
            MP_ERR(vo, "Out of memory.\n");
            return;
        }

        mp_image_setfmt(new_ref, IMGFMT_MMAL);
        new_ref->planes[3] = (void *)buffer;

        struct mp_image dmpi = {0};
        buffer->length = layout_buffer(&dmpi, buffer, vo->params);
        mp_image_copy(&dmpi, mpi);

        talloc_free(mpi);
        mpi = new_ref;
    }

    p->next_image = mpi;
}

static int query_format(struct vo *vo, int format)
{
    return format == IMGFMT_MMAL || format == IMGFMT_420P;
}

static MMAL_FOURCC_T map_csp(enum mp_csp csp)
{
    switch (csp) {
    case MP_CSP_BT_601:     return MMAL_COLOR_SPACE_ITUR_BT601;
    case MP_CSP_BT_709:     return MMAL_COLOR_SPACE_ITUR_BT709;
    case MP_CSP_SMPTE_240M: return MMAL_COLOR_SPACE_SMPTE240M;
    default:                return MMAL_COLOR_SPACE_UNKNOWN;
    }
}

static void control_port_cb(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
{
    mmal_buffer_header_release(buffer);
}

static void input_port_cb(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
{
    struct mp_image *mpi = buffer->user_data;
    talloc_free(mpi);
}

static void disable_renderer(struct vo *vo)
{
    struct priv *p = vo->priv;

    if (p->renderer_enabled) {
        mmal_port_disable(p->renderer->control);
        mmal_port_disable(p->renderer->input[0]);

        mmal_port_flush(p->renderer->control);
        mmal_port_flush(p->renderer->input[0]);

        mmal_component_disable(p->renderer);
    }
    mmal_pool_destroy(p->swpool);
    p->swpool = NULL;
    p->renderer_enabled = false;
}

static int reconfig(struct vo *vo, struct mp_image_params *params)
{
    struct priv *p = vo->priv;
    MMAL_PORT_T *input = p->renderer->input[0];
    bool opaque = params->imgfmt == IMGFMT_MMAL;

    if (!p->display)
        return -1;

    disable_renderer(vo);

    input->format->encoding = opaque ? MMAL_ENCODING_OPAQUE : MMAL_ENCODING_I420;
    input->format->es->video.width = MP_ALIGN_UP(params->w, ALIGN_W);
    input->format->es->video.height = MP_ALIGN_UP(params->h, ALIGN_H);
    input->format->es->video.crop = (MMAL_RECT_T){0, 0, params->w, params->h};
    input->format->es->video.par = (MMAL_RATIONAL_T){params->p_w, params->p_h};
    input->format->es->video.color_space = map_csp(params->color.space);

    if (mmal_port_format_commit(input))
        return -1;

    input->buffer_num = MPMAX(input->buffer_num_min,
                              input->buffer_num_recommended) + 3;
    input->buffer_size = MPMAX(input->buffer_size_min,
                               input->buffer_size_recommended);

    if (!opaque) {
        size_t size = layout_buffer(&(struct mp_image){0}, NULL, params);
        if (input->buffer_size != size) {
            MP_FATAL(vo, "We disagree with MMAL about buffer sizes.\n");
            return -1;
        }

        p->swpool = mmal_pool_create(input->buffer_num, input->buffer_size);
        if (!p->swpool) {
            MP_FATAL(vo, "Could not allocate buffer pool.\n");
            return -1;
        }
    }

    if (set_geometry(vo) < 0)
        return -1;

    p->renderer_enabled = true;

    if (mmal_port_enable(p->renderer->control, control_port_cb))
        return -1;

    if (mmal_port_enable(input, input_port_cb))
        return -1;

    if (mmal_component_enable(p->renderer)) {
        MP_FATAL(vo, "Failed to enable video renderer.\n");
        return -1;
    }

    resize(vo);

    return 0;
}

static struct mp_image *take_screenshot(struct vo *vo)
{
    struct priv *p = vo->priv;

    if (!p->display)
        return NULL;

    struct mp_image *img = mp_image_alloc(IMGFMT_BGR0, p->w, p->h);
    if (!img)
        return NULL;

    DISPMANX_RESOURCE_HANDLE_T resource =
        vc_dispmanx_resource_create(VC_IMAGE_ARGB8888,
                                    img->w | ((img->w * 4) << 16), img->h,
                                    &(int32_t){0});
    if (!resource)
        goto fail;

    if (vc_dispmanx_snapshot(p->display, resource, 0))
        goto fail;

    VC_RECT_T rc = {.width = img->w, .height = img->h};
    if (vc_dispmanx_resource_read_data(resource, &rc, img->planes[0], img->stride[0]))
        goto fail;

    vc_dispmanx_resource_delete(resource);
    return img;

fail:
    vc_dispmanx_resource_delete(resource);
    talloc_free(img);
    return NULL;
}

static int control(struct vo *vo, uint32_t request, void *data)
{
    struct priv *p = vo->priv;

    switch (request) {
    case VOCTRL_FULLSCREEN:
        if (p->renderer_enabled)
            set_geometry(vo);
        vo->want_redraw = true;
        return VO_TRUE;
    case VOCTRL_SET_PANSCAN:
        if (p->renderer_enabled)
            resize(vo);
        vo->want_redraw = true;
        return VO_TRUE;
    case VOCTRL_REDRAW_FRAME:
        update_osd(vo);
        return VO_TRUE;
    case VOCTRL_SCREENSHOT_WIN:
        *(struct mp_image **)data = take_screenshot(vo);
        return VO_TRUE;
    case VOCTRL_CHECK_EVENTS: {
        pthread_mutex_lock(&p->display_mutex);
        bool reload_required = p->reload_display;
        p->reload_display = false;
        pthread_mutex_unlock(&p->display_mutex);
        if (reload_required)
            recreate_renderer(vo);
        return VO_TRUE;
    }
    case VOCTRL_GET_DISPLAY_FPS:
        *(double *)data = p->display_fps;
        return VO_TRUE;
    }

    return VO_NOTIMPL;
}

static void tv_callback(void *callback_data, uint32_t reason, uint32_t param1,
                        uint32_t param2)
{
    struct vo *vo = callback_data;
    struct priv *p = vo->priv;
    pthread_mutex_lock(&p->display_mutex);
    p->reload_display = true;
    pthread_cond_signal(&p->display_cond);
    pthread_mutex_unlock(&p->display_mutex);
    vo_wakeup(vo);
}

static void vsync_callback(DISPMANX_UPDATE_HANDLE_T u, void *arg)
{
    struct vo *vo = arg;
    struct priv *p = vo->priv;
    pthread_mutex_lock(&p->display_mutex);
    p->vsync_counter += 1;
    pthread_cond_signal(&p->display_cond);
    pthread_mutex_unlock(&p->display_mutex);
}

static void destroy_dispmanx(struct vo *vo)
{
    struct priv *p = vo->priv;

    disable_renderer(vo);
    destroy_overlays(vo);

    if (p->display) {
        vc_dispmanx_vsync_callback(p->display, NULL, NULL);
        vc_dispmanx_display_close(p->display);
    }
    p->display = 0;
}

static int recreate_dispmanx(struct vo *vo)
{
    struct priv *p = vo->priv;

    p->display = vc_dispmanx_display_open(p->display_nr);
    p->update = vc_dispmanx_update_start(0);
    if (!p->display || !p->update) {
        MP_FATAL(vo, "Could not get DISPMANX objects.\n");
        if (p->display)
            vc_dispmanx_display_close(p->display);
        p->display = 0;
        p->update = 0;
        return -1;
    }

    update_display_size(vo);

    vc_dispmanx_vsync_callback(p->display, vsync_callback, vo);

    return 0;
}

static void recreate_renderer(struct vo *vo)
{
    MP_WARN(vo, "Recreating renderer after display change.\n");

    destroy_dispmanx(vo);
    recreate_dispmanx(vo);

    if (vo->params) {
        if (reconfig(vo, vo->params) < 0)
            MP_FATAL(vo, "Recreation failed.\n");
    }
}

static void uninit(struct vo *vo)
{
    struct priv *p = vo->priv;

    vc_tv_unregister_callback_full(tv_callback, vo);

    talloc_free(p->next_image);

    destroy_dispmanx(vo);

    if (p->update)
        vc_dispmanx_update_submit_sync(p->update);

    if (p->renderer)
        mmal_component_release(p->renderer);

    mmal_vc_deinit();

    pthread_cond_destroy(&p->display_cond);
    pthread_mutex_destroy(&p->display_mutex);
}

static int preinit(struct vo *vo)
{
    struct priv *p = vo->priv;

    p->background_layer = p->layer;
    p->video_layer = p->layer + 1;
    p->osd_layer = p->layer + 2;

    p->egl.log = vo->log;

    bcm_host_init();

    if (mmal_vc_init()) {
        MP_FATAL(vo, "Could not initialize MMAL.\n");
        return -1;
    }

    pthread_mutex_init(&p->display_mutex, NULL);
    pthread_cond_init(&p->display_cond, NULL);

    if (recreate_dispmanx(vo) < 0)
        goto fail;

    if (update_display_size(vo) < 0)
        goto fail;

    if (mmal_component_create(MMAL_COMPONENT_DEFAULT_VIDEO_RENDERER, &p->renderer))
    {
        MP_FATAL(vo, "Could not create MMAL renderer.\n");
        goto fail;
    }

    vc_tv_register_callback(tv_callback, vo);

    return 0;

fail:
    uninit(vo);
    return -1;
}

#define OPT_BASE_STRUCT struct priv
static const struct m_option options[] = {
    OPT_INT("display", display_nr, 0),
    OPT_INT("layer", layer, 0, OPTDEF_INT(-10)),
    OPT_FLAG("background", background, 0),
    OPT_FLAG("osd", enable_osd, 0, OPTDEF_INT(1)),
    {0},
};

const struct vo_driver video_out_rpi = {
    .description = "Raspberry Pi (MMAL)",
    .name = "rpi",
    .caps = VO_CAP_ROTATE90,
    .preinit = preinit,
    .query_format = query_format,
    .reconfig = reconfig,
    .control = control,
    .draw_frame = draw_frame,
    .flip_page = flip_page,
    .uninit = uninit,
    .priv_size = sizeof(struct priv),
    .options = options,
    .options_prefix = "rpi",
};