aboutsummaryrefslogblamecommitdiffstats
path: root/libavfilter/vf_xfade_vulkan.c
blob: 8825717890fc5bad72303413ea4d62a71939711c (plain) (tree)
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






































































































































































































































































































































































































































































































































































































                                                                                                                                                       
/*
 * This file is part of FFmpeg.
 *
 * FFmpeg 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.
 *
 * FFmpeg 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 FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "libavutil/avassert.h"
#include "libavutil/random_seed.h"
#include "libavutil/opt.h"
#include "vulkan_filter.h"
#include "vulkan_spirv.h"
#include "filters.h"
#include "internal.h"

#define IN_A  0
#define IN_B  1
#define IN_NB 2

typedef struct XFadeParameters {
    float progress;
} XFadeParameters;

typedef struct XFadeVulkanContext {
    FFVulkanContext     vkctx;

    int                 transition;
    int64_t             duration;
    int64_t             offset;

    int                 initialized;
    FFVulkanPipeline    pl;
    FFVkExecPool        e;
    FFVkQueueFamilyCtx  qf;
    FFVkSPIRVShader     shd;
    VkSampler           sampler;

    // PTS when the fade should start (in IN_A timebase)
    int64_t             start_pts;

    // PTS offset between IN_A and IN_B
    int64_t             inputs_offset_pts;

    // Duration of the transition
    int64_t             duration_pts;

    // Current PTS of the first input (IN_A)
    int64_t             pts;

    // If frames are currently just passed through
    // unmodified, like before and after the actual
    // transition.
    int                 passthrough;

    int                 status[IN_NB];
} XFadeVulkanContext;

enum XFadeTransitions {
    FADE,
    WIPELEFT,
    WIPERIGHT,
    WIPEUP,
    WIPEDOWN,
    SLIDEDOWN,
    SLIDEUP,
    SLIDELEFT,
    SLIDERIGHT,
    NB_TRANSITIONS,
};

static const char transition_fade[] = {
    C(0, void transition(int idx, ivec2 pos, float progress)                   )
    C(0, {                                                                     )
    C(1,     vec4 a = texture(a_images[idx], pos);                             )
    C(1,     vec4 b = texture(b_images[idx], pos);                             )
    C(1,     imageStore(output_images[idx], pos, mix(a, b, progress));         )
    C(0, }                                                                     )
};

static const char transition_wipeleft[] = {
    C(0, void transition(int idx, ivec2 pos, float progress)                   )
    C(0, {                                                                     )
    C(1,     ivec2 size = imageSize(output_images[idx]);                       )
    C(1,     int  s = int(size.x * (1.0 - progress));                          )
    C(1,     vec4 a = texture(a_images[idx], pos);                             )
    C(1,     vec4 b = texture(b_images[idx], pos);                             )
    C(1,     imageStore(output_images[idx], pos, pos.x > s ? b : a);           )
    C(0, }                                                                     )
};

static const char transition_wiperight[] = {
    C(0, void transition(int idx, ivec2 pos, float progress)                   )
    C(0, {                                                                     )
    C(1,     ivec2 size = imageSize(output_images[idx]);                       )
    C(1,     int  s = int(size.x * progress);                                  )
    C(1,     vec4 a = texture(a_images[idx], pos);                             )
    C(1,     vec4 b = texture(b_images[idx], pos);                             )
    C(1,     imageStore(output_images[idx], pos, pos.x > s ? a : b);           )
    C(0, }                                                                     )
};

static const char transition_wipeup[] = {
    C(0, void transition(int idx, ivec2 pos, float progress)                   )
    C(0, {                                                                     )
    C(1,     ivec2 size = imageSize(output_images[idx]);                       )
    C(1,     int  s = int(size.y * (1.0 - progress));                          )
    C(1,     vec4 a = texture(a_images[idx], pos);                             )
    C(1,     vec4 b = texture(b_images[idx], pos);                             )
    C(1,     imageStore(output_images[idx], pos, pos.y > s ? b : a);           )
    C(0, }                                                                     )
};

static const char transition_wipedown[] = {
    C(0, void transition(int idx, ivec2 pos, float progress)                   )
    C(0, {                                                                     )
    C(1,     ivec2 size = imageSize(output_images[idx]);                       )
    C(1,     int  s = int(size.y * progress);                                  )
    C(1,     vec4 a = texture(a_images[idx], pos);                             )
    C(1,     vec4 b = texture(b_images[idx], pos);                             )
    C(1,     imageStore(output_images[idx], pos, pos.y > s ? a : b);           )
    C(0, }                                                                     )
};

#define SHADER_SLIDE_COMMON                                                              \
    C(0, void slide(int idx, ivec2 pos, float progress, ivec2 direction)               ) \
    C(0, {                                                                             ) \
    C(1,     ivec2 size = imageSize(output_images[idx]);                               ) \
    C(1,     ivec2 pi = ivec2(progress * size);                                        ) \
    C(1,     ivec2 p = pos + pi * direction;                                           ) \
    C(1,     ivec2 f = p % size;                                                       ) \
    C(1,     f = f + size * ivec2(f.x < 0, f.y < 0);                                   ) \
    C(1,     vec4 a = texture(a_images[idx], f);                                       ) \
    C(1,     vec4 b = texture(b_images[idx], f);                                       ) \
    C(1,     vec4 r = (p.y >= 0 && p.x >= 0 && size.y > p.y &&  size.x > p.x) ? a : b; ) \
    C(1,     imageStore(output_images[idx], pos, r);                                   ) \
    C(0, }                                                                             )

static const char transition_slidedown[] = {
    SHADER_SLIDE_COMMON
    C(0, void transition(int idx, ivec2 pos, float progress)                   )
    C(0, {                                                                     )
    C(1,     slide(idx, pos, progress, ivec2(0, -1));                          )
    C(0, }                                                                     )
};

static const char transition_slideup[] = {
    SHADER_SLIDE_COMMON
    C(0, void transition(int idx, ivec2 pos, float progress)                   )
    C(0, {                                                                     )
    C(1,     slide(idx, pos, progress, ivec2(0, +1));                          )
    C(0, }                                                                     )
};

static const char transition_slideleft[] = {
    SHADER_SLIDE_COMMON
    C(0, void transition(int idx, ivec2 pos, float progress)                   )
    C(0, {                                                                     )
    C(1,     slide(idx, pos, progress, ivec2(+1, 0));                          )
    C(0, }                                                                     )
};

static const char transition_slideright[] = {
    SHADER_SLIDE_COMMON
    C(0, void transition(int idx, ivec2 pos, float progress)                   )
    C(0, {                                                                     )
    C(1,     slide(idx, pos, progress, ivec2(-1, 0));                          )
    C(0, }                                                                     )
};

static const char* transitions_map[NB_TRANSITIONS] = {
    [FADE]      = transition_fade,
    [WIPELEFT]  = transition_wipeleft,
    [WIPERIGHT] = transition_wiperight,
    [WIPEUP]    = transition_wipeup,
    [WIPEDOWN]  = transition_wipedown,
    [SLIDEDOWN] = transition_slidedown,
    [SLIDEUP]   = transition_slideup,
    [SLIDELEFT] = transition_slideleft,
    [SLIDERIGHT]= transition_slideright,
};

static av_cold int init_vulkan(AVFilterContext *avctx)
{
    int err = 0;
    uint8_t *spv_data;
    size_t spv_len;
    void *spv_opaque = NULL;
    XFadeVulkanContext *s = avctx->priv;
    FFVulkanContext *vkctx = &s->vkctx;
    const int planes = av_pix_fmt_count_planes(s->vkctx.output_format);
    FFVkSPIRVShader *shd = &s->shd;
    FFVkSPIRVCompiler *spv;
    FFVulkanDescriptorSetBinding *desc;

    spv = ff_vk_spirv_init();
    if (!spv) {
        av_log(avctx, AV_LOG_ERROR, "Unable to initialize SPIR-V compiler!\n");
        return AVERROR_EXTERNAL;
    }

    ff_vk_qf_init(vkctx, &s->qf, VK_QUEUE_COMPUTE_BIT);
    RET(ff_vk_exec_pool_init(vkctx, &s->qf, &s->e, s->qf.nb_queues*4, 0, 0, 0, NULL));
    RET(ff_vk_init_sampler(vkctx, &s->sampler, 1, VK_FILTER_NEAREST));
    RET(ff_vk_shader_init(&s->pl, &s->shd, "xfade_compute",
                          VK_SHADER_STAGE_COMPUTE_BIT, 0));

    ff_vk_shader_set_compute_sizes(&s->shd, 32, 32, 1);

    desc = (FFVulkanDescriptorSetBinding []) {
        {
            .name       = "a_images",
            .type       = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
            .dimensions = 2,
            .elems      = planes,
            .stages     = VK_SHADER_STAGE_COMPUTE_BIT,
            .samplers   = DUP_SAMPLER(s->sampler),
        },
        {
            .name       = "b_images",
            .type       = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
            .dimensions = 2,
            .elems      = planes,
            .stages     = VK_SHADER_STAGE_COMPUTE_BIT,
            .samplers   = DUP_SAMPLER(s->sampler),
        },
        {
            .name       = "output_images",
            .type       = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE,
            .mem_layout = ff_vk_shader_rep_fmt(s->vkctx.output_format),
            .mem_quali  = "writeonly",
            .dimensions = 2,
            .elems      = planes,
            .stages     = VK_SHADER_STAGE_COMPUTE_BIT,
        },
    };

    RET(ff_vk_pipeline_descriptor_set_add(vkctx, &s->pl, shd, desc, 3, 0, 0));

    GLSLC(0, layout(push_constant, std430) uniform pushConstants {                 );
    GLSLC(1,    float progress;                                                    );
    GLSLC(0, };                                                                    );

    ff_vk_add_push_constant(&s->pl, 0, sizeof(XFadeParameters),
                            VK_SHADER_STAGE_COMPUTE_BIT);

    // Add the right transition type function to the shader
    GLSLD(transitions_map[s->transition]);

    GLSLC(0, void main()                                                  );
    GLSLC(0, {                                                            );
    GLSLC(1,     ivec2 pos = ivec2(gl_GlobalInvocationID.xy);             );
    GLSLF(1,     int planes = %i;                                  ,planes);
    GLSLC(1,     for (int i = 0; i < planes; i++) {                       );
    GLSLC(2,        transition(i, pos, progress);                         );
    GLSLC(1,     }                                                        );
    GLSLC(0, }                                                            );

    RET(spv->compile_shader(spv, avctx, shd, &spv_data, &spv_len, "main",
                            &spv_opaque));
    RET(ff_vk_shader_create(vkctx, shd, spv_data, spv_len, "main"));

    RET(ff_vk_init_compute_pipeline(vkctx, &s->pl, shd));
    RET(ff_vk_exec_pipeline_register(vkctx, &s->e, &s->pl));

    s->initialized = 1;

fail:
    if (spv_opaque)
        spv->free_shader(spv, &spv_opaque);
    if (spv)
        spv->uninit(&spv);

    return err;
}

static int xfade_frame(AVFilterContext *avctx, AVFrame *frame_a, AVFrame *frame_b)
{
    int err;
    AVFilterLink *outlink = avctx->outputs[0];
    XFadeVulkanContext *s = avctx->priv;
    float progress;

    AVFrame *output = ff_get_video_buffer(outlink, outlink->w, outlink->h);
    if (!output) {
        err = AVERROR(ENOMEM);
        goto fail;
    }

    if (!s->initialized) {
        AVHWFramesContext *a_fc = (AVHWFramesContext*)frame_a->hw_frames_ctx->data;
        AVHWFramesContext *b_fc = (AVHWFramesContext*)frame_b->hw_frames_ctx->data;
        if (a_fc->sw_format != b_fc->sw_format) {
            av_log(avctx, AV_LOG_ERROR,
                   "Currently the sw format of the first input needs to match the second!\n");
            return AVERROR(EINVAL);
        }
        RET(init_vulkan(avctx));
    }

    RET(av_frame_copy_props(output, frame_a));
    output->pts = s->pts;

    progress = av_clipf((float)(s->pts - s->start_pts) / s->duration_pts,
                        0.f, 1.f);

    RET(ff_vk_filter_process_Nin(&s->vkctx, &s->e, &s->pl, output,
                                 (AVFrame *[]){ frame_a, frame_b }, 2, s->sampler,
                                 &(XFadeParameters){ progress }, sizeof(XFadeParameters)));

    return ff_filter_frame(outlink, output);

fail:
    av_frame_free(&output);
    return err;
}

static int config_props_output(AVFilterLink *outlink)
{
    int err;
    AVFilterContext *avctx = outlink->src;
    XFadeVulkanContext *s = avctx->priv;
    AVFilterLink *inlink_a = avctx->inputs[IN_A];
    AVFilterLink *inlink_b = avctx->inputs[IN_B];

    if (inlink_a->w != inlink_b->w || inlink_a->h != inlink_b->h) {
        av_log(avctx, AV_LOG_ERROR, "First input link %s parameters "
               "(size %dx%d) do not match the corresponding "
               "second input link %s parameters (size %dx%d)\n",
               avctx->input_pads[IN_A].name, inlink_a->w, inlink_a->h,
               avctx->input_pads[IN_B].name, inlink_b->w, inlink_b->h);
        return AVERROR(EINVAL);
    }

    if (inlink_a->time_base.num != inlink_b->time_base.num ||
        inlink_a->time_base.den != inlink_b->time_base.den) {
        av_log(avctx, AV_LOG_ERROR, "First input link %s timebase "
               "(%d/%d) does not match the corresponding "
               "second input link %s timebase (%d/%d)\n",
               avctx->input_pads[IN_A].name, inlink_a->time_base.num, inlink_a->time_base.den,
               avctx->input_pads[IN_B].name, inlink_b->time_base.num, inlink_b->time_base.den);
        return AVERROR(EINVAL);
    }

    s->start_pts = s->inputs_offset_pts = AV_NOPTS_VALUE;

    outlink->time_base = inlink_a->time_base;
    outlink->frame_rate = inlink_a->frame_rate;
    outlink->sample_aspect_ratio = inlink_a->sample_aspect_ratio;

    if (s->duration)
        s->duration_pts = av_rescale_q(s->duration, AV_TIME_BASE_Q, inlink_a->time_base);
    RET(ff_vk_filter_config_output(outlink));

fail:
    return err;
}

static int forward_frame(XFadeVulkanContext *s,
                         AVFilterLink *inlink, AVFilterLink *outlink)
{
    int64_t status_pts;
    int ret = 0, status;
    AVFrame *frame = NULL;

    ret = ff_inlink_consume_frame(inlink, &frame);
    if (ret < 0)
        return ret;

    if (ret > 0) {
        // If we do not have an offset yet, it's because we
        // never got a first input. Just offset to 0
        if (s->inputs_offset_pts == AV_NOPTS_VALUE)
            s->inputs_offset_pts = -frame->pts;

        // We got a frame, nothing to do other than adjusting the timestamp
        frame->pts += s->inputs_offset_pts;
        return ff_filter_frame(outlink, frame);
    }

    // Forward status with our timestamp
    if (ff_inlink_acknowledge_status(inlink, &status, &status_pts)) {
        if (s->inputs_offset_pts == AV_NOPTS_VALUE)
            s->inputs_offset_pts = -status_pts;

        ff_outlink_set_status(outlink, status, status_pts + s->inputs_offset_pts);
        return 0;
    }

    // No frame available, request one if needed
    if (ff_outlink_frame_wanted(outlink))
        ff_inlink_request_frame(inlink);

    return 0;
}

static int activate(AVFilterContext *avctx)
{
    XFadeVulkanContext *s = avctx->priv;
    AVFilterLink *in_a = avctx->inputs[IN_A];
    AVFilterLink *in_b = avctx->inputs[IN_B];
    AVFilterLink *outlink = avctx->outputs[0];
    int64_t status_pts;

    FF_FILTER_FORWARD_STATUS_BACK_ALL(outlink, avctx);

    // Check if we already transitioned or IN_A ended prematurely,
    // in which case just forward the frames from IN_B with adjusted
    // timestamps until EOF.
    if (s->status[IN_A] && !s->status[IN_B])
        return forward_frame(s, in_b, outlink);

    // We did not finish transitioning yet and the first stream
    // did not end either, so check if there are more frames to consume.
    if (ff_inlink_check_available_frame(in_a)) {
        AVFrame *peeked_frame = ff_inlink_peek_frame(in_a, 0);
        s->pts = peeked_frame->pts;

        if (s->start_pts == AV_NOPTS_VALUE)
            s->start_pts =
                s->pts + av_rescale_q(s->offset, AV_TIME_BASE_Q, in_a->time_base);

        // Check if we are not yet transitioning, in which case
        // just request and forward the input frame.
        if (s->start_pts > s->pts) {
            AVFrame *frame_a = NULL;
            s->passthrough = 1;
            ff_inlink_consume_frame(in_a, &frame_a);
            return ff_filter_frame(outlink, frame_a);
        }
        s->passthrough = 0;

        // We are transitioning, so we need a frame from IN_B
        if (ff_inlink_check_available_frame(in_b)) {
            int ret;
            AVFrame *frame_a = NULL, *frame_b = NULL;
            ff_inlink_consume_frame(avctx->inputs[IN_A], &frame_a);
            ff_inlink_consume_frame(avctx->inputs[IN_B], &frame_b);

            // Calculate PTS offset to first input
            if (s->inputs_offset_pts == AV_NOPTS_VALUE)
                s->inputs_offset_pts = s->pts - frame_b->pts;

            // Check if we finished transitioning, in which case we
            // report back EOF to IN_A as it is no longer needed.
            if (s->pts - s->start_pts > s->duration_pts) {
                s->status[IN_A] = AVERROR_EOF;
                ff_inlink_set_status(in_a, AVERROR_EOF);
                s->passthrough = 1;
            }
            ret = xfade_frame(avctx, frame_a, frame_b);
            av_frame_free(&frame_a);
            av_frame_free(&frame_b);
            return ret;
        }

        // We did not get a frame from IN_B, check its status.
        if (ff_inlink_acknowledge_status(in_b, &s->status[IN_B], &status_pts)) {
            // We should transition, but IN_B is EOF so just report EOF output now.
            ff_outlink_set_status(outlink, s->status[IN_B], s->pts);
            return 0;
        }

        // We did not get a frame for IN_B but no EOF either, so just request more.
        if (ff_outlink_frame_wanted(outlink)) {
            ff_inlink_request_frame(in_b);
            return 0;
        }
    }

    // We did not get a frame from IN_A, check its status.
    if (ff_inlink_acknowledge_status(in_a, &s->status[IN_A], &status_pts)) {
        // No more frames from IN_A, do not report EOF though, we will just
        // forward the IN_B frames in the next activate calls.
        s->passthrough = 1;
        ff_filter_set_ready(avctx, 100);
        return 0;
    }

    // We have no frames yet from IN_A and no EOF, so request some.
    if (ff_outlink_frame_wanted(outlink)) {
        ff_inlink_request_frame(in_a);
        return 0;
    }

    return FFERROR_NOT_READY;
}

static av_cold void uninit(AVFilterContext *avctx)
{
    XFadeVulkanContext *s = avctx->priv;
    FFVulkanContext *vkctx = &s->vkctx;
    FFVulkanFunctions *vk = &vkctx->vkfn;

    ff_vk_exec_pool_free(vkctx, &s->e);
    ff_vk_pipeline_free(vkctx, &s->pl);
    ff_vk_shader_free(vkctx, &s->shd);

    if (s->sampler)
        vk->DestroySampler(vkctx->hwctx->act_dev, s->sampler,
                           vkctx->hwctx->alloc);

    ff_vk_uninit(&s->vkctx);

    s->initialized = 0;
}

static AVFrame *get_video_buffer(AVFilterLink *inlink, int w, int h)
{
    XFadeVulkanContext *s = inlink->dst->priv;

    return s->passthrough ?
        ff_null_get_video_buffer   (inlink, w, h) :
        ff_default_get_video_buffer(inlink, w, h);
}

#define OFFSET(x) offsetof(XFadeVulkanContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)

static const AVOption xfade_vulkan_options[] = {
    { "transition", "set cross fade transition", OFFSET(transition), AV_OPT_TYPE_INT, {.i64=FADE}, 0, NB_TRANSITIONS-1, FLAGS, "transition" },
        { "fade",      "fade transition", 0, AV_OPT_TYPE_CONST, {.i64=FADE}, 0, 0, FLAGS, "transition" },
        { "wipeleft",  "wipe left transition", 0, AV_OPT_TYPE_CONST, {.i64=WIPELEFT}, 0, 0, FLAGS, "transition" },
        { "wiperight", "wipe right transition", 0, AV_OPT_TYPE_CONST, {.i64=WIPERIGHT}, 0, 0, FLAGS, "transition" },
        { "wipeup",    "wipe up transition", 0, AV_OPT_TYPE_CONST, {.i64=WIPEUP}, 0, 0, FLAGS, "transition" },
        { "wipedown",  "wipe down transition", 0, AV_OPT_TYPE_CONST, {.i64=WIPEDOWN}, 0, 0, FLAGS, "transition" },
        { "slidedown", "slide down transition", 0, AV_OPT_TYPE_CONST, {.i64=SLIDEDOWN}, 0, 0, FLAGS, "transition" },
        { "slideup",   "slide up transition", 0, AV_OPT_TYPE_CONST, {.i64=SLIDEUP}, 0, 0, FLAGS, "transition" },
        { "slideleft", "slide left transition", 0, AV_OPT_TYPE_CONST, {.i64=SLIDELEFT}, 0, 0, FLAGS, "transition" },
        { "slideright","slide right transition", 0, AV_OPT_TYPE_CONST, {.i64=SLIDERIGHT}, 0, 0, FLAGS, "transition" },
    { "duration", "set cross fade duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=1000000}, 0, 60000000, FLAGS },
    { "offset",   "set cross fade start relative to first input stream", OFFSET(offset), AV_OPT_TYPE_DURATION, {.i64=0}, INT64_MIN, INT64_MAX, FLAGS },
    { NULL }
};

AVFILTER_DEFINE_CLASS(xfade_vulkan);

static const AVFilterPad xfade_vulkan_inputs[] = {
    {
        .name             = "main",
        .type             = AVMEDIA_TYPE_VIDEO,
        .get_buffer.video = &get_video_buffer,
        .config_props     = &ff_vk_filter_config_input,
    },
    {
        .name             = "xfade",
        .type             = AVMEDIA_TYPE_VIDEO,
        .get_buffer.video = &get_video_buffer,
        .config_props     = &ff_vk_filter_config_input,
    },
};

static const AVFilterPad xfade_vulkan_outputs[] = {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_VIDEO,
        .config_props  = &config_props_output,
    },
};

const AVFilter ff_vf_xfade_vulkan = {
    .name            = "xfade_vulkan",
    .description     = NULL_IF_CONFIG_SMALL("Cross fade one video with another video."),
    .priv_size       = sizeof(XFadeVulkanContext),
    .init            = &ff_vk_filter_init,
    .uninit          = &uninit,
    .activate        = &activate,
    FILTER_INPUTS(xfade_vulkan_inputs),
    FILTER_OUTPUTS(xfade_vulkan_outputs),
    FILTER_SINGLE_PIXFMT(AV_PIX_FMT_VULKAN),
    .priv_class      = &xfade_vulkan_class,
    .flags_internal  = FF_FILTER_FLAG_HWFRAME_AWARE,
    .flags           = AVFILTER_FLAG_HWDEVICE,
};