adfcd759a81cb90d9ead1595537f81565c6e26ef
[ffmpeg.git] / libavfilter / vf_xfade.c
1 /*
2  * Copyright (c) 2020 Paul B Mahol
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20
21 #include "libavutil/imgutils.h"
22 #include "libavutil/eval.h"
23 #include "libavutil/opt.h"
24 #include "libavutil/pixfmt.h"
25 #include "avfilter.h"
26 #include "formats.h"
27 #include "internal.h"
28 #include "filters.h"
29 #include "video.h"
30
31 enum XFadeTransitions {
32     CUSTOM = -1,
33     FADE,
34     WIPELEFT,
35     WIPERIGHT,
36     WIPEUP,
37     WIPEDOWN,
38     SLIDELEFT,
39     SLIDERIGHT,
40     SLIDEUP,
41     SLIDEDOWN,
42     CIRCLECROP,
43     RECTCROP,
44     DISTANCE,
45     FADEBLACK,
46     FADEWHITE,
47     RADIAL,
48     SMOOTHLEFT,
49     SMOOTHRIGHT,
50     SMOOTHUP,
51     SMOOTHDOWN,
52     CIRCLEOPEN,
53     CIRCLECLOSE,
54     VERTOPEN,
55     VERTCLOSE,
56     HORZOPEN,
57     HORZCLOSE,
58     DISSOLVE,
59     PIXELIZE,
60     DIAGTL,
61     DIAGTR,
62     DIAGBL,
63     DIAGBR,
64     HLSLICE,
65     HRSLICE,
66     VUSLICE,
67     VDSLICE,
68     HBLUR,
69     FADEGRAYS,
70     WIPETL,
71     WIPETR,
72     WIPEBL,
73     WIPEBR,
74     NB_TRANSITIONS,
75 };
76
77 typedef struct XFadeContext {
78     const AVClass *class;
79
80     int     transition;
81     int64_t duration;
82     int64_t offset;
83     char   *custom_str;
84
85     int nb_planes;
86     int depth;
87     int is_rgb;
88
89     int64_t duration_pts;
90     int64_t offset_pts;
91     int64_t first_pts;
92     int64_t last_pts;
93     int64_t pts;
94     int xfade_is_over;
95     int need_second;
96     int eof[2];
97     AVFrame *xf[2];
98     int max_value;
99     uint16_t black[4];
100     uint16_t white[4];
101
102     void (*transitionf)(AVFilterContext *ctx, const AVFrame *a, const AVFrame *b, AVFrame *out, float progress,
103                         int slice_start, int slice_end, int jobnr);
104
105     AVExpr *e;
106 } XFadeContext;
107
108 static const char *const var_names[] = {   "X",   "Y",   "W",   "H",   "A",   "B",   "PLANE",          "P",        NULL };
109 enum                                   { VAR_X, VAR_Y, VAR_W, VAR_H, VAR_A, VAR_B, VAR_PLANE, VAR_PROGRESS, VAR_VARS_NB };
110
111 typedef struct ThreadData {
112     const AVFrame *xf[2];
113     AVFrame *out;
114     float progress;
115 } ThreadData;
116
117 static int query_formats(AVFilterContext *ctx)
118 {
119     static const enum AVPixelFormat pix_fmts[] = {
120         AV_PIX_FMT_YUVA444P,
121         AV_PIX_FMT_YUVJ444P,
122         AV_PIX_FMT_YUV444P,
123         AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8,
124         AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_GBRP9,
125         AV_PIX_FMT_YUV444P10,
126         AV_PIX_FMT_YUVA444P10,
127         AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GRAY10,
128         AV_PIX_FMT_YUV444P12,
129         AV_PIX_FMT_YUVA444P12,
130         AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GRAY12,
131         AV_PIX_FMT_YUV444P14, AV_PIX_FMT_GBRP14,
132         AV_PIX_FMT_YUV444P16,
133         AV_PIX_FMT_YUVA444P16,
134         AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16, AV_PIX_FMT_GRAY16,
135         AV_PIX_FMT_NONE
136     };
137
138     AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
139     if (!fmts_list)
140         return AVERROR(ENOMEM);
141     return ff_set_common_formats(ctx, fmts_list);
142 }
143
144 static av_cold void uninit(AVFilterContext *ctx)
145 {
146     XFadeContext *s = ctx->priv;
147
148     av_expr_free(s->e);
149 }
150
151 #define OFFSET(x) offsetof(XFadeContext, x)
152 #define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
153
154 static const AVOption xfade_options[] = {
155     { "transition", "set cross fade transition", OFFSET(transition), AV_OPT_TYPE_INT, {.i64=FADE}, -1, NB_TRANSITIONS-1, FLAGS, "transition" },
156     {   "custom",    "custom transition",     0, AV_OPT_TYPE_CONST, {.i64=CUSTOM},    0, 0, FLAGS, "transition" },
157     {   "fade",      "fade transition",       0, AV_OPT_TYPE_CONST, {.i64=FADE},      0, 0, FLAGS, "transition" },
158     {   "wipeleft",  "wipe left transition",  0, AV_OPT_TYPE_CONST, {.i64=WIPELEFT},  0, 0, FLAGS, "transition" },
159     {   "wiperight", "wipe right transition", 0, AV_OPT_TYPE_CONST, {.i64=WIPERIGHT}, 0, 0, FLAGS, "transition" },
160     {   "wipeup",    "wipe up transition",    0, AV_OPT_TYPE_CONST, {.i64=WIPEUP},    0, 0, FLAGS, "transition" },
161     {   "wipedown",  "wipe down transition",  0, AV_OPT_TYPE_CONST, {.i64=WIPEDOWN},  0, 0, FLAGS, "transition" },
162     {   "slideleft",  "slide left transition",  0, AV_OPT_TYPE_CONST, {.i64=SLIDELEFT},  0, 0, FLAGS, "transition" },
163     {   "slideright", "slide right transition", 0, AV_OPT_TYPE_CONST, {.i64=SLIDERIGHT}, 0, 0, FLAGS, "transition" },
164     {   "slideup",    "slide up transition",    0, AV_OPT_TYPE_CONST, {.i64=SLIDEUP},    0, 0, FLAGS, "transition" },
165     {   "slidedown",  "slide down transition",  0, AV_OPT_TYPE_CONST, {.i64=SLIDEDOWN},  0, 0, FLAGS, "transition" },
166     {   "circlecrop", "circle crop transition", 0, AV_OPT_TYPE_CONST, {.i64=CIRCLECROP}, 0, 0, FLAGS, "transition" },
167     {   "rectcrop",   "rect crop transition",   0, AV_OPT_TYPE_CONST, {.i64=RECTCROP},   0, 0, FLAGS, "transition" },
168     {   "distance",   "distance transition",    0, AV_OPT_TYPE_CONST, {.i64=DISTANCE},   0, 0, FLAGS, "transition" },
169     {   "fadeblack",  "fadeblack transition",   0, AV_OPT_TYPE_CONST, {.i64=FADEBLACK},  0, 0, FLAGS, "transition" },
170     {   "fadewhite",  "fadewhite transition",   0, AV_OPT_TYPE_CONST, {.i64=FADEWHITE},  0, 0, FLAGS, "transition" },
171     {   "radial",     "radial transition",      0, AV_OPT_TYPE_CONST, {.i64=RADIAL},     0, 0, FLAGS, "transition" },
172     {   "smoothleft", "smoothleft transition",  0, AV_OPT_TYPE_CONST, {.i64=SMOOTHLEFT}, 0, 0, FLAGS, "transition" },
173     {   "smoothright","smoothright transition", 0, AV_OPT_TYPE_CONST, {.i64=SMOOTHRIGHT},0, 0, FLAGS, "transition" },
174     {   "smoothup",   "smoothup transition",    0, AV_OPT_TYPE_CONST, {.i64=SMOOTHUP},   0, 0, FLAGS, "transition" },
175     {   "smoothdown", "smoothdown transition",  0, AV_OPT_TYPE_CONST, {.i64=SMOOTHDOWN}, 0, 0, FLAGS, "transition" },
176     {   "circleopen", "circleopen transition",  0, AV_OPT_TYPE_CONST, {.i64=CIRCLEOPEN}, 0, 0, FLAGS, "transition" },
177     {   "circleclose","circleclose transition", 0, AV_OPT_TYPE_CONST, {.i64=CIRCLECLOSE},0, 0, FLAGS, "transition" },
178     {   "vertopen",   "vert open transition",   0, AV_OPT_TYPE_CONST, {.i64=VERTOPEN},   0, 0, FLAGS, "transition" },
179     {   "vertclose",  "vert close transition",  0, AV_OPT_TYPE_CONST, {.i64=VERTCLOSE},  0, 0, FLAGS, "transition" },
180     {   "horzopen",   "horz open transition",   0, AV_OPT_TYPE_CONST, {.i64=HORZOPEN},   0, 0, FLAGS, "transition" },
181     {   "horzclose",  "horz close transition",  0, AV_OPT_TYPE_CONST, {.i64=HORZCLOSE},  0, 0, FLAGS, "transition" },
182     {   "dissolve",   "dissolve transition",    0, AV_OPT_TYPE_CONST, {.i64=DISSOLVE},   0, 0, FLAGS, "transition" },
183     {   "pixelize",   "pixelize transition",    0, AV_OPT_TYPE_CONST, {.i64=PIXELIZE},   0, 0, FLAGS, "transition" },
184     {   "diagtl",     "diag tl transition",     0, AV_OPT_TYPE_CONST, {.i64=DIAGTL},     0, 0, FLAGS, "transition" },
185     {   "diagtr",     "diag tr transition",     0, AV_OPT_TYPE_CONST, {.i64=DIAGTR},     0, 0, FLAGS, "transition" },
186     {   "diagbl",     "diag bl transition",     0, AV_OPT_TYPE_CONST, {.i64=DIAGBL},     0, 0, FLAGS, "transition" },
187     {   "diagbr",     "diag br transition",     0, AV_OPT_TYPE_CONST, {.i64=DIAGBR},     0, 0, FLAGS, "transition" },
188     {   "hlslice",    "hl slice transition",    0, AV_OPT_TYPE_CONST, {.i64=HLSLICE},    0, 0, FLAGS, "transition" },
189     {   "hrslice",    "hr slice transition",    0, AV_OPT_TYPE_CONST, {.i64=HRSLICE},    0, 0, FLAGS, "transition" },
190     {   "vuslice",    "vu slice transition",    0, AV_OPT_TYPE_CONST, {.i64=VUSLICE},    0, 0, FLAGS, "transition" },
191     {   "vdslice",    "vd slice transition",    0, AV_OPT_TYPE_CONST, {.i64=VDSLICE},    0, 0, FLAGS, "transition" },
192     {   "hblur",      "hblur transition",       0, AV_OPT_TYPE_CONST, {.i64=HBLUR},      0, 0, FLAGS, "transition" },
193     {   "fadegrays",  "fadegrays transition",   0, AV_OPT_TYPE_CONST, {.i64=FADEGRAYS},  0, 0, FLAGS, "transition" },
194     {   "wipetl",     "wipe tl transition",     0, AV_OPT_TYPE_CONST, {.i64=WIPETL},     0, 0, FLAGS, "transition" },
195     {   "wipetr",     "wipe tr transition",     0, AV_OPT_TYPE_CONST, {.i64=WIPETR},     0, 0, FLAGS, "transition" },
196     {   "wipebl",     "wipe bl transition",     0, AV_OPT_TYPE_CONST, {.i64=WIPEBL},     0, 0, FLAGS, "transition" },
197     {   "wipebr",     "wipe br transition",     0, AV_OPT_TYPE_CONST, {.i64=WIPEBR},     0, 0, FLAGS, "transition" },
198     { "duration", "set cross fade duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=1000000}, 0, 60000000, FLAGS },
199     { "offset",   "set cross fade start relative to first input stream", OFFSET(offset), AV_OPT_TYPE_DURATION, {.i64=0}, INT64_MIN, INT64_MAX, FLAGS },
200     { "expr",   "set expression for custom transition", OFFSET(custom_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
201     { NULL }
202 };
203
204 AVFILTER_DEFINE_CLASS(xfade);
205
206 #define CUSTOM_TRANSITION(name, type, div)                                           \
207 static void custom##name##_transition(AVFilterContext *ctx,                          \
208                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
209                             float progress,                                          \
210                             int slice_start, int slice_end, int jobnr)               \
211 {                                                                                    \
212     XFadeContext *s = ctx->priv;                                                     \
213     const int height = slice_end - slice_start;                                      \
214                                                                                      \
215     double values[VAR_VARS_NB];                                                      \
216     values[VAR_W] = out->width;                                                      \
217     values[VAR_H] = out->height;                                                     \
218     values[VAR_PROGRESS] = progress;                                                 \
219                                                                                      \
220     for (int p = 0; p < s->nb_planes; p++) {                                         \
221         const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
222         const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
223         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);         \
224                                                                                      \
225         values[VAR_PLANE] = p;                                                       \
226                                                                                      \
227         for (int y = 0; y < height; y++) {                                           \
228             values[VAR_Y] = slice_start + y;                                         \
229             for (int x = 0; x < out->width; x++) {                                   \
230                 values[VAR_X] = x;                                                   \
231                 values[VAR_A] = xf0[x];                                              \
232                 values[VAR_B] = xf1[x];                                              \
233                 dst[x] = av_expr_eval(s->e, values, s);                              \
234             }                                                                        \
235                                                                                      \
236             dst += out->linesize[p] / div;                                           \
237             xf0 += a->linesize[p] / div;                                             \
238             xf1 += b->linesize[p] / div;                                             \
239         }                                                                            \
240     }                                                                                \
241 }
242
243 CUSTOM_TRANSITION(8, uint8_t, 1)
244 CUSTOM_TRANSITION(16, uint16_t, 2)
245
246 static inline float mix(float a, float b, float mix)
247 {
248     return a * mix + b * (1.f - mix);
249 }
250
251 static inline float fract(float a)
252 {
253     return a - floorf(a);
254 }
255
256 static inline float smoothstep(float edge0, float edge1, float x)
257 {
258     float t;
259
260     t = av_clipf((x - edge0) / (edge1 - edge0), 0.f, 1.f);
261
262     return t * t * (3.f - 2.f * t);
263 }
264
265 #define FADE_TRANSITION(name, type, div)                                             \
266 static void fade##name##_transition(AVFilterContext *ctx,                            \
267                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
268                             float progress,                                          \
269                             int slice_start, int slice_end, int jobnr)               \
270 {                                                                                    \
271     XFadeContext *s = ctx->priv;                                                     \
272     const int height = slice_end - slice_start;                                      \
273                                                                                      \
274     for (int p = 0; p < s->nb_planes; p++) {                                         \
275         const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
276         const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
277         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);         \
278                                                                                      \
279         for (int y = 0; y < height; y++) {                                           \
280             for (int x = 0; x < out->width; x++) {                                   \
281                 dst[x] = mix(xf0[x], xf1[x], progress);                              \
282             }                                                                        \
283                                                                                      \
284             dst += out->linesize[p] / div;                                           \
285             xf0 += a->linesize[p] / div;                                             \
286             xf1 += b->linesize[p] / div;                                             \
287         }                                                                            \
288     }                                                                                \
289 }
290
291 FADE_TRANSITION(8, uint8_t, 1)
292 FADE_TRANSITION(16, uint16_t, 2)
293
294 #define WIPELEFT_TRANSITION(name, type, div)                                         \
295 static void wipeleft##name##_transition(AVFilterContext *ctx,                        \
296                                 const AVFrame *a, const AVFrame *b, AVFrame *out,    \
297                                 float progress,                                      \
298                                 int slice_start, int slice_end, int jobnr)           \
299 {                                                                                    \
300     XFadeContext *s = ctx->priv;                                                     \
301     const int height = slice_end - slice_start;                                      \
302     const int z = out->width * progress;                                             \
303                                                                                      \
304     for (int p = 0; p < s->nb_planes; p++) {                                         \
305         const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
306         const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
307         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);         \
308                                                                                      \
309         for (int y = 0; y < height; y++) {                                           \
310             for (int x = 0; x < out->width; x++) {                                   \
311                 dst[x] = x > z ? xf1[x] : xf0[x];                                    \
312             }                                                                        \
313                                                                                      \
314             dst += out->linesize[p] / div;                                           \
315             xf0 += a->linesize[p] / div;                                             \
316             xf1 += b->linesize[p] / div;                                             \
317         }                                                                            \
318     }                                                                                \
319 }
320
321 WIPELEFT_TRANSITION(8, uint8_t, 1)
322 WIPELEFT_TRANSITION(16, uint16_t, 2)
323
324 #define WIPERIGHT_TRANSITION(name, type, div)                                        \
325 static void wiperight##name##_transition(AVFilterContext *ctx,                       \
326                                  const AVFrame *a, const AVFrame *b, AVFrame *out,   \
327                                  float progress,                                     \
328                                  int slice_start, int slice_end, int jobnr)          \
329 {                                                                                    \
330     XFadeContext *s = ctx->priv;                                                     \
331     const int height = slice_end - slice_start;                                      \
332     const int z = out->width * (1.f - progress);                                     \
333                                                                                      \
334     for (int p = 0; p < s->nb_planes; p++) {                                         \
335         const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
336         const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
337         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);         \
338                                                                                      \
339         for (int y = 0; y < height; y++) {                                           \
340             for (int x = 0; x < out->width; x++) {                                   \
341                 dst[x] = x > z ? xf0[x] : xf1[x];                                    \
342             }                                                                        \
343                                                                                      \
344             dst += out->linesize[p] / div;                                           \
345             xf0 += a->linesize[p] / div;                                             \
346             xf1 += b->linesize[p] / div;                                             \
347         }                                                                            \
348     }                                                                                \
349 }
350
351 WIPERIGHT_TRANSITION(8, uint8_t, 1)
352 WIPERIGHT_TRANSITION(16, uint16_t, 2)
353
354 #define WIPEUP_TRANSITION(name, type, div)                                           \
355 static void wipeup##name##_transition(AVFilterContext *ctx,                          \
356                               const AVFrame *a, const AVFrame *b, AVFrame *out,      \
357                               float progress,                                        \
358                               int slice_start, int slice_end, int jobnr)             \
359 {                                                                                    \
360     XFadeContext *s = ctx->priv;                                                     \
361     const int height = slice_end - slice_start;                                      \
362     const int z = out->height * progress;                                            \
363                                                                                      \
364     for (int p = 0; p < s->nb_planes; p++) {                                         \
365         const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
366         const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
367         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);         \
368                                                                                      \
369         for (int y = 0; y < height; y++) {                                           \
370             for (int x = 0; x < out->width; x++) {                                   \
371                 dst[x] = slice_start + y > z ? xf1[x] : xf0[x];                      \
372             }                                                                        \
373                                                                                      \
374             dst += out->linesize[p] / div;                                           \
375             xf0 += a->linesize[p] / div;                                             \
376             xf1 += b->linesize[p] / div;                                             \
377         }                                                                            \
378     }                                                                                \
379 }
380
381 WIPEUP_TRANSITION(8, uint8_t, 1)
382 WIPEUP_TRANSITION(16, uint16_t, 2)
383
384 #define WIPEDOWN_TRANSITION(name, type, div)                                         \
385 static void wipedown##name##_transition(AVFilterContext *ctx,                        \
386                                 const AVFrame *a, const AVFrame *b, AVFrame *out,    \
387                                 float progress,                                      \
388                                 int slice_start, int slice_end, int jobnr)           \
389 {                                                                                    \
390     XFadeContext *s = ctx->priv;                                                     \
391     const int height = slice_end - slice_start;                                      \
392     const int z = out->height * (1.f - progress);                                    \
393                                                                                      \
394     for (int p = 0; p < s->nb_planes; p++) {                                         \
395         const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
396         const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
397         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);         \
398                                                                                      \
399         for (int y = 0; y < height; y++) {                                           \
400             for (int x = 0; x < out->width; x++) {                                   \
401                 dst[x] = slice_start + y > z ? xf0[x] : xf1[x];                      \
402             }                                                                        \
403                                                                                      \
404             dst += out->linesize[p] / div;                                           \
405             xf0 += a->linesize[p] / div;                                             \
406             xf1 += b->linesize[p] / div;                                             \
407         }                                                                            \
408     }                                                                                \
409 }
410
411 WIPEDOWN_TRANSITION(8, uint8_t, 1)
412 WIPEDOWN_TRANSITION(16, uint16_t, 2)
413
414 #define SLIDELEFT_TRANSITION(name, type, div)                                        \
415 static void slideleft##name##_transition(AVFilterContext *ctx,                       \
416                                  const AVFrame *a, const AVFrame *b, AVFrame *out,   \
417                                  float progress,                                     \
418                                  int slice_start, int slice_end, int jobnr)          \
419 {                                                                                    \
420     XFadeContext *s = ctx->priv;                                                     \
421     const int height = slice_end - slice_start;                                      \
422     const int width = out->width;                                                    \
423     const int z = -progress * width;                                                 \
424                                                                                      \
425     for (int p = 0; p < s->nb_planes; p++) {                                         \
426         const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
427         const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
428         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);         \
429                                                                                      \
430         for (int y = 0; y < height; y++) {                                           \
431             for (int x = 0; x < width; x++) {                                        \
432                 const int zx = z + x;                                                \
433                 const int zz = zx % width + width * (zx < 0);                        \
434                 dst[x] = (zx > 0) && (zx < width) ? xf1[zz] : xf0[zz];               \
435             }                                                                        \
436                                                                                      \
437             dst += out->linesize[p] / div;                                           \
438             xf0 += a->linesize[p] / div;                                             \
439             xf1 += b->linesize[p] / div;                                             \
440         }                                                                            \
441     }                                                                                \
442 }
443
444 SLIDELEFT_TRANSITION(8, uint8_t, 1)
445 SLIDELEFT_TRANSITION(16, uint16_t, 2)
446
447 #define SLIDERIGHT_TRANSITION(name, type, div)                                       \
448 static void slideright##name##_transition(AVFilterContext *ctx,                      \
449                                   const AVFrame *a, const AVFrame *b, AVFrame *out,  \
450                                   float progress,                                    \
451                                   int slice_start, int slice_end, int jobnr)         \
452 {                                                                                    \
453     XFadeContext *s = ctx->priv;                                                     \
454     const int height = slice_end - slice_start;                                      \
455     const int width = out->width;                                                    \
456     const int z = progress * width;                                                  \
457                                                                                      \
458     for (int p = 0; p < s->nb_planes; p++) {                                         \
459         const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
460         const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
461         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);         \
462                                                                                      \
463         for (int y = 0; y < height; y++) {                                           \
464             for (int x = 0; x < out->width; x++) {                                   \
465                 const int zx = z + x;                                                \
466                 const int zz = zx % width + width * (zx < 0);                        \
467                 dst[x] = (zx > 0) && (zx < width) ? xf1[zz] : xf0[zz];               \
468             }                                                                        \
469                                                                                      \
470             dst += out->linesize[p] / div;                                           \
471             xf0 += a->linesize[p] / div;                                             \
472             xf1 += b->linesize[p] / div;                                             \
473         }                                                                            \
474     }                                                                                \
475 }
476
477 SLIDERIGHT_TRANSITION(8, uint8_t, 1)
478 SLIDERIGHT_TRANSITION(16, uint16_t, 2)
479
480 #define SLIDEUP_TRANSITION(name, type, div)                                         \
481 static void slideup##name##_transition(AVFilterContext *ctx,                        \
482                                const AVFrame *a, const AVFrame *b, AVFrame *out,    \
483                                float progress,                                      \
484                                int slice_start, int slice_end, int jobnr)           \
485 {                                                                                   \
486     XFadeContext *s = ctx->priv;                                                    \
487     const int height = out->height;                                                 \
488     const int z = -progress * height;                                               \
489                                                                                     \
490     for (int p = 0; p < s->nb_planes; p++) {                                        \
491         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);        \
492                                                                                     \
493         for (int y = slice_start; y < slice_end; y++) {                             \
494             const int zy = z + y;                                                   \
495             const int zz = zy % height + height * (zy < 0);                         \
496             const type *xf0 = (const type *)(a->data[p] + zz * a->linesize[p]);     \
497             const type *xf1 = (const type *)(b->data[p] + zz * b->linesize[p]);     \
498                                                                                     \
499             for (int x = 0; x < out->width; x++) {                                  \
500                 dst[x] = (zy > 0) && (zy < height) ? xf1[x] : xf0[x];               \
501             }                                                                       \
502                                                                                     \
503             dst += out->linesize[p] / div;                                          \
504         }                                                                           \
505     }                                                                               \
506 }
507
508 SLIDEUP_TRANSITION(8, uint8_t, 1)
509 SLIDEUP_TRANSITION(16, uint16_t, 2)
510
511 #define SLIDEDOWN_TRANSITION(name, type, div)                                       \
512 static void slidedown##name##_transition(AVFilterContext *ctx,                      \
513                                  const AVFrame *a, const AVFrame *b, AVFrame *out,  \
514                                  float progress,                                    \
515                                  int slice_start, int slice_end, int jobnr)         \
516 {                                                                                   \
517     XFadeContext *s = ctx->priv;                                                    \
518     const int height = out->height;                                                 \
519     const int z = progress * height;                                                \
520                                                                                     \
521     for (int p = 0; p < s->nb_planes; p++) {                                        \
522         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);        \
523                                                                                     \
524         for (int y = slice_start; y < slice_end; y++) {                             \
525             const int zy = z + y;                                                   \
526             const int zz = zy % height + height * (zy < 0);                         \
527             const type *xf0 = (const type *)(a->data[p] + zz * a->linesize[p]);     \
528             const type *xf1 = (const type *)(b->data[p] + zz * b->linesize[p]);     \
529                                                                                     \
530             for (int x = 0; x < out->width; x++) {                                  \
531                 dst[x] = (zy > 0) && (zy < height) ? xf1[x] : xf0[x];               \
532             }                                                                       \
533                                                                                     \
534             dst += out->linesize[p] / div;                                          \
535         }                                                                           \
536     }                                                                               \
537 }
538
539 SLIDEDOWN_TRANSITION(8, uint8_t, 1)
540 SLIDEDOWN_TRANSITION(16, uint16_t, 2)
541
542 #define CIRCLECROP_TRANSITION(name, type, div)                                      \
543 static void circlecrop##name##_transition(AVFilterContext *ctx,                     \
544                                  const AVFrame *a, const AVFrame *b, AVFrame *out,  \
545                                  float progress,                                    \
546                                  int slice_start, int slice_end, int jobnr)         \
547 {                                                                                   \
548     XFadeContext *s = ctx->priv;                                                    \
549     const int width = out->width;                                                   \
550     const int height = out->height;                                                 \
551     float z = powf(2.f * fabsf(progress - 0.5f), 3.f) * hypotf(width/2, height/2);  \
552                                                                                     \
553     for (int p = 0; p < s->nb_planes; p++) {                                        \
554         const int bg = s->black[p];                                                 \
555         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);        \
556                                                                                     \
557         for (int y = slice_start; y < slice_end; y++) {                             \
558             const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);      \
559             const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);      \
560                                                                                     \
561             for (int x = 0; x < width; x++) {                                       \
562                 float dist = hypotf(x - width / 2, y - height / 2);                 \
563                 int val = progress < 0.5f ? xf1[x] : xf0[x];                        \
564                 dst[x] = (z < dist) ? bg : val;                                     \
565             }                                                                       \
566                                                                                     \
567             dst += out->linesize[p] / div;                                          \
568         }                                                                           \
569     }                                                                               \
570 }
571
572 CIRCLECROP_TRANSITION(8, uint8_t, 1)
573 CIRCLECROP_TRANSITION(16, uint16_t, 2)
574
575 #define RECTCROP_TRANSITION(name, type, div)                                        \
576 static void rectcrop##name##_transition(AVFilterContext *ctx,                       \
577                                  const AVFrame *a, const AVFrame *b, AVFrame *out,  \
578                                  float progress,                                    \
579                                  int slice_start, int slice_end, int jobnr)         \
580 {                                                                                   \
581     XFadeContext *s = ctx->priv;                                                    \
582     const int width = out->width;                                                   \
583     const int height = out->height;                                                 \
584     int zh = fabsf(progress - 0.5f) * height;                                       \
585     int zw = fabsf(progress - 0.5f) * width;                                        \
586                                                                                     \
587     for (int p = 0; p < s->nb_planes; p++) {                                        \
588         const int bg = s->black[p];                                                 \
589         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);        \
590                                                                                     \
591         for (int y = slice_start; y < slice_end; y++) {                             \
592             const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);      \
593             const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);      \
594                                                                                     \
595             for (int x = 0; x < width; x++) {                                       \
596                 int dist = FFABS(x - width  / 2) < zw &&                            \
597                            FFABS(y - height / 2) < zh;                              \
598                 int val = progress < 0.5f ? xf1[x] : xf0[x];                        \
599                 dst[x] = !dist ? bg : val;                                          \
600             }                                                                       \
601                                                                                     \
602             dst += out->linesize[p] / div;                                          \
603         }                                                                           \
604     }                                                                               \
605 }
606
607 RECTCROP_TRANSITION(8, uint8_t, 1)
608 RECTCROP_TRANSITION(16, uint16_t, 2)
609
610 #define DISTANCE_TRANSITION(name, type, div)                                        \
611 static void distance##name##_transition(AVFilterContext *ctx,                       \
612                                  const AVFrame *a, const AVFrame *b, AVFrame *out,  \
613                                  float progress,                                    \
614                                  int slice_start, int slice_end, int jobnr)         \
615 {                                                                                   \
616     XFadeContext *s = ctx->priv;                                                    \
617     const int width = out->width;                                                   \
618     const float max = s->max_value;                                                 \
619                                                                                     \
620     for (int y = slice_start; y < slice_end; y++) {                                 \
621         for (int x = 0; x < width; x++) {                                           \
622             float dist = 0.f;                                                       \
623             for (int p = 0; p < s->nb_planes; p++) {                                \
624                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);  \
625                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);  \
626                                                                                     \
627                 dist += (xf0[x] / max - xf1[x] / max) *                             \
628                         (xf0[x] / max - xf1[x] / max);                              \
629             }                                                                       \
630                                                                                     \
631             dist = sqrtf(dist) <= progress;                                         \
632             for (int p = 0; p < s->nb_planes; p++) {                                \
633                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);  \
634                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);  \
635                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);          \
636                 dst[x] = mix(mix(xf0[x], xf1[x], dist), xf1[x], progress);          \
637             }                                                                       \
638         }                                                                           \
639     }                                                                               \
640 }
641
642 DISTANCE_TRANSITION(8, uint8_t, 1)
643 DISTANCE_TRANSITION(16, uint16_t, 2)
644
645 #define FADEBLACK_TRANSITION(name, type, div)                                        \
646 static void fadeblack##name##_transition(AVFilterContext *ctx,                       \
647                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
648                             float progress,                                          \
649                             int slice_start, int slice_end, int jobnr)               \
650 {                                                                                    \
651     XFadeContext *s = ctx->priv;                                                     \
652     const int height = slice_end - slice_start;                                      \
653     const float phase = 0.2f;                                                        \
654                                                                                      \
655     for (int p = 0; p < s->nb_planes; p++) {                                         \
656         const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
657         const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
658         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);         \
659         const int bg = s->black[p];                                                  \
660                                                                                      \
661         for (int y = 0; y < height; y++) {                                           \
662             for (int x = 0; x < out->width; x++) {                                   \
663                 dst[x] = mix(mix(xf0[x], bg, smoothstep(1.f-phase, 1.f, progress)),  \
664                          mix(bg, xf1[x], smoothstep(phase, 1.f, progress)),          \
665                              progress);                                              \
666             }                                                                        \
667                                                                                      \
668             dst += out->linesize[p] / div;                                           \
669             xf0 += a->linesize[p] / div;                                             \
670             xf1 += b->linesize[p] / div;                                             \
671         }                                                                            \
672     }                                                                                \
673 }
674
675 FADEBLACK_TRANSITION(8, uint8_t, 1)
676 FADEBLACK_TRANSITION(16, uint16_t, 2)
677
678 #define FADEWHITE_TRANSITION(name, type, div)                                        \
679 static void fadewhite##name##_transition(AVFilterContext *ctx,                       \
680                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
681                             float progress,                                          \
682                             int slice_start, int slice_end, int jobnr)               \
683 {                                                                                    \
684     XFadeContext *s = ctx->priv;                                                     \
685     const int height = slice_end - slice_start;                                      \
686     const float phase = 0.2f;                                                        \
687                                                                                      \
688     for (int p = 0; p < s->nb_planes; p++) {                                         \
689         const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
690         const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
691         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);         \
692         const int bg = s->white[p];                                                  \
693                                                                                      \
694         for (int y = 0; y < height; y++) {                                           \
695             for (int x = 0; x < out->width; x++) {                                   \
696                 dst[x] = mix(mix(xf0[x], bg, smoothstep(1.f-phase, 1.f, progress)),  \
697                          mix(bg, xf1[x], smoothstep(phase, 1.f, progress)),          \
698                              progress);                                              \
699             }                                                                        \
700                                                                                      \
701             dst += out->linesize[p] / div;                                           \
702             xf0 += a->linesize[p] / div;                                             \
703             xf1 += b->linesize[p] / div;                                             \
704         }                                                                            \
705     }                                                                                \
706 }
707
708 FADEWHITE_TRANSITION(8, uint8_t, 1)
709 FADEWHITE_TRANSITION(16, uint16_t, 2)
710
711 #define RADIAL_TRANSITION(name, type, div)                                           \
712 static void radial##name##_transition(AVFilterContext *ctx,                          \
713                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
714                             float progress,                                          \
715                             int slice_start, int slice_end, int jobnr)               \
716 {                                                                                    \
717     XFadeContext *s = ctx->priv;                                                     \
718     const int width = out->width;                                                    \
719     const int height = out->height;                                                  \
720                                                                                      \
721     for (int y = slice_start; y < slice_end; y++) {                                  \
722         for (int x = 0; x < width; x++) {                                            \
723             const float smooth = atan2f(x - width / 2, y - height / 2) -             \
724                                  (progress - 0.5f) * (M_PI * 2.5f);                  \
725             for (int p = 0; p < s->nb_planes; p++) {                                 \
726                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
727                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
728                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
729                                                                                      \
730                 dst[x] = mix(xf1[x], xf0[x], smoothstep(0.f, 1.f, smooth));          \
731             }                                                                        \
732         }                                                                            \
733     }                                                                                \
734 }
735
736 RADIAL_TRANSITION(8, uint8_t, 1)
737 RADIAL_TRANSITION(16, uint16_t, 2)
738
739 #define SMOOTHLEFT_TRANSITION(name, type, div)                                       \
740 static void smoothleft##name##_transition(AVFilterContext *ctx,                      \
741                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
742                             float progress,                                          \
743                             int slice_start, int slice_end, int jobnr)               \
744 {                                                                                    \
745     XFadeContext *s = ctx->priv;                                                     \
746     const int width = out->width;                                                    \
747     const float w = width;                                                           \
748                                                                                      \
749     for (int y = slice_start; y < slice_end; y++) {                                  \
750         for (int x = 0; x < width; x++) {                                            \
751             const float smooth = 1.f + x / w - progress * 2.f;                       \
752                                                                                      \
753             for (int p = 0; p < s->nb_planes; p++) {                                 \
754                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
755                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
756                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
757                                                                                      \
758                 dst[x] = mix(xf1[x], xf0[x], smoothstep(0.f, 1.f, smooth));          \
759             }                                                                        \
760         }                                                                            \
761     }                                                                                \
762 }
763
764 SMOOTHLEFT_TRANSITION(8, uint8_t, 1)
765 SMOOTHLEFT_TRANSITION(16, uint16_t, 2)
766
767 #define SMOOTHRIGHT_TRANSITION(name, type, div)                                      \
768 static void smoothright##name##_transition(AVFilterContext *ctx,                     \
769                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
770                             float progress,                                          \
771                             int slice_start, int slice_end, int jobnr)               \
772 {                                                                                    \
773     XFadeContext *s = ctx->priv;                                                     \
774     const int width = out->width;                                                    \
775     const float w = width;                                                           \
776                                                                                      \
777     for (int y = slice_start; y < slice_end; y++) {                                  \
778         for (int x = 0; x < width; x++) {                                            \
779             const float smooth = 1.f + (w - 1 - x) / w - progress * 2.f;             \
780                                                                                      \
781             for (int p = 0; p < s->nb_planes; p++) {                                 \
782                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
783                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
784                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
785                                                                                      \
786                 dst[x] = mix(xf1[x], xf0[x], smoothstep(0.f, 1.f, smooth));          \
787             }                                                                        \
788         }                                                                            \
789     }                                                                                \
790 }
791
792 SMOOTHRIGHT_TRANSITION(8, uint8_t, 1)
793 SMOOTHRIGHT_TRANSITION(16, uint16_t, 2)
794
795 #define SMOOTHUP_TRANSITION(name, type, div)                                         \
796 static void smoothup##name##_transition(AVFilterContext *ctx,                        \
797                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
798                             float progress,                                          \
799                             int slice_start, int slice_end, int jobnr)               \
800 {                                                                                    \
801     XFadeContext *s = ctx->priv;                                                     \
802     const int width = out->width;                                                    \
803     const float h = out->height;                                                     \
804                                                                                      \
805     for (int y = slice_start; y < slice_end; y++) {                                  \
806         const float smooth = 1.f + y / h - progress * 2.f;                           \
807         for (int x = 0; x < width; x++) {                                            \
808             for (int p = 0; p < s->nb_planes; p++) {                                 \
809                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
810                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
811                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
812                                                                                      \
813                 dst[x] = mix(xf1[x], xf0[x], smoothstep(0.f, 1.f, smooth));          \
814             }                                                                        \
815         }                                                                            \
816     }                                                                                \
817 }
818
819 SMOOTHUP_TRANSITION(8, uint8_t, 1)
820 SMOOTHUP_TRANSITION(16, uint16_t, 2)
821
822 #define SMOOTHDOWN_TRANSITION(name, type, div)                                       \
823 static void smoothdown##name##_transition(AVFilterContext *ctx,                      \
824                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
825                             float progress,                                          \
826                             int slice_start, int slice_end, int jobnr)               \
827 {                                                                                    \
828     XFadeContext *s = ctx->priv;                                                     \
829     const int width = out->width;                                                    \
830     const float h = out->height;                                                     \
831                                                                                      \
832     for (int y = slice_start; y < slice_end; y++) {                                  \
833         const float smooth = 1.f + (h - 1 - y) / h - progress * 2.f;                 \
834         for (int x = 0; x < width; x++) {                                            \
835             for (int p = 0; p < s->nb_planes; p++) {                                 \
836                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
837                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
838                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
839                                                                                      \
840                 dst[x] = mix(xf1[x], xf0[x], smoothstep(0.f, 1.f, smooth));          \
841             }                                                                        \
842         }                                                                            \
843     }                                                                                \
844 }
845
846 SMOOTHDOWN_TRANSITION(8, uint8_t, 1)
847 SMOOTHDOWN_TRANSITION(16, uint16_t, 2)
848
849 #define CIRCLEOPEN_TRANSITION(name, type, div)                                       \
850 static void circleopen##name##_transition(AVFilterContext *ctx,                      \
851                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
852                             float progress,                                          \
853                             int slice_start, int slice_end, int jobnr)               \
854 {                                                                                    \
855     XFadeContext *s = ctx->priv;                                                     \
856     const int width = out->width;                                                    \
857     const int height = out->height;                                                  \
858     const float z = hypotf(width / 2, height / 2);                                   \
859     const float p = (progress - 0.5f) * 3.f;                                         \
860                                                                                      \
861     for (int y = slice_start; y < slice_end; y++) {                                  \
862         for (int x = 0; x < width; x++) {                                            \
863             const float smooth = hypotf(x - width / 2, y - height / 2) / z + p;      \
864             for (int p = 0; p < s->nb_planes; p++) {                                 \
865                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
866                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
867                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
868                                                                                      \
869                 dst[x] = mix(xf0[x], xf1[x], smoothstep(0.f, 1.f, smooth));          \
870             }                                                                        \
871         }                                                                            \
872     }                                                                                \
873 }
874
875 CIRCLEOPEN_TRANSITION(8, uint8_t, 1)
876 CIRCLEOPEN_TRANSITION(16, uint16_t, 2)
877
878 #define CIRCLECLOSE_TRANSITION(name, type, div)                                      \
879 static void circleclose##name##_transition(AVFilterContext *ctx,                     \
880                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
881                             float progress,                                          \
882                             int slice_start, int slice_end, int jobnr)               \
883 {                                                                                    \
884     XFadeContext *s = ctx->priv;                                                     \
885     const int width = out->width;                                                    \
886     const int height = out->height;                                                  \
887     const float z = hypotf(width / 2, height / 2);                                   \
888     const float p = (1.f - progress - 0.5f) * 3.f;                                   \
889                                                                                      \
890     for (int y = slice_start; y < slice_end; y++) {                                  \
891         for (int x = 0; x < width; x++) {                                            \
892             const float smooth = hypotf(x - width / 2, y - height / 2) / z + p;      \
893             for (int p = 0; p < s->nb_planes; p++) {                                 \
894                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
895                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
896                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
897                                                                                      \
898                 dst[x] = mix(xf1[x], xf0[x], smoothstep(0.f, 1.f, smooth));          \
899             }                                                                        \
900         }                                                                            \
901     }                                                                                \
902 }
903
904 CIRCLECLOSE_TRANSITION(8, uint8_t, 1)
905 CIRCLECLOSE_TRANSITION(16, uint16_t, 2)
906
907 #define VERTOPEN_TRANSITION(name, type, div)                                         \
908 static void vertopen##name##_transition(AVFilterContext *ctx,                        \
909                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
910                             float progress,                                          \
911                             int slice_start, int slice_end, int jobnr)               \
912 {                                                                                    \
913     XFadeContext *s = ctx->priv;                                                     \
914     const int width = out->width;                                                    \
915     const float w2 = out->width / 2;                                                 \
916                                                                                      \
917     for (int y = slice_start; y < slice_end; y++) {                                  \
918         for (int x = 0; x < width; x++) {                                            \
919             const float smooth = 2.f - fabsf((x - w2) / w2) - progress * 2.f;        \
920             for (int p = 0; p < s->nb_planes; p++) {                                 \
921                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
922                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
923                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
924                                                                                      \
925                 dst[x] = mix(xf1[x], xf0[x], smoothstep(0.f, 1.f, smooth));          \
926             }                                                                        \
927         }                                                                            \
928     }                                                                                \
929 }
930
931 VERTOPEN_TRANSITION(8, uint8_t, 1)
932 VERTOPEN_TRANSITION(16, uint16_t, 2)
933
934 #define VERTCLOSE_TRANSITION(name, type, div)                                        \
935 static void vertclose##name##_transition(AVFilterContext *ctx,                       \
936                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
937                             float progress,                                          \
938                             int slice_start, int slice_end, int jobnr)               \
939 {                                                                                    \
940     XFadeContext *s = ctx->priv;                                                     \
941     const int width = out->width;                                                    \
942     const float w2 = out->width / 2;                                                 \
943                                                                                      \
944     for (int y = slice_start; y < slice_end; y++) {                                  \
945         for (int x = 0; x < width; x++) {                                            \
946             const float smooth = 1.f + fabsf((x - w2) / w2) - progress * 2.f;        \
947             for (int p = 0; p < s->nb_planes; p++) {                                 \
948                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
949                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
950                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
951                                                                                      \
952                 dst[x] = mix(xf1[x], xf0[x], smoothstep(0.f, 1.f, smooth));          \
953             }                                                                        \
954         }                                                                            \
955     }                                                                                \
956 }
957
958 VERTCLOSE_TRANSITION(8, uint8_t, 1)
959 VERTCLOSE_TRANSITION(16, uint16_t, 2)
960
961 #define HORZOPEN_TRANSITION(name, type, div)                                         \
962 static void horzopen##name##_transition(AVFilterContext *ctx,                        \
963                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
964                             float progress,                                          \
965                             int slice_start, int slice_end, int jobnr)               \
966 {                                                                                    \
967     XFadeContext *s = ctx->priv;                                                     \
968     const int width = out->width;                                                    \
969     const float h2 = out->height / 2;                                                \
970                                                                                      \
971     for (int y = slice_start; y < slice_end; y++) {                                  \
972         const float smooth = 2.f - fabsf((y - h2) / h2) - progress * 2.f;            \
973         for (int x = 0; x < width; x++) {                                            \
974             for (int p = 0; p < s->nb_planes; p++) {                                 \
975                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
976                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
977                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
978                                                                                      \
979                 dst[x] = mix(xf1[x], xf0[x], smoothstep(0.f, 1.f, smooth));          \
980             }                                                                        \
981         }                                                                            \
982     }                                                                                \
983 }
984
985 HORZOPEN_TRANSITION(8, uint8_t, 1)
986 HORZOPEN_TRANSITION(16, uint16_t, 2)
987
988 #define HORZCLOSE_TRANSITION(name, type, div)                                        \
989 static void horzclose##name##_transition(AVFilterContext *ctx,                       \
990                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
991                             float progress,                                          \
992                             int slice_start, int slice_end, int jobnr)               \
993 {                                                                                    \
994     XFadeContext *s = ctx->priv;                                                     \
995     const int width = out->width;                                                    \
996     const float h2 = out->height / 2;                                                \
997                                                                                      \
998     for (int y = slice_start; y < slice_end; y++) {                                  \
999         const float smooth = 1.f + fabsf((y - h2) / h2) - progress * 2.f;            \
1000         for (int x = 0; x < width; x++) {                                            \
1001             for (int p = 0; p < s->nb_planes; p++) {                                 \
1002                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
1003                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
1004                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
1005                                                                                      \
1006                 dst[x] = mix(xf1[x], xf0[x], smoothstep(0.f, 1.f, smooth));          \
1007             }                                                                        \
1008         }                                                                            \
1009     }                                                                                \
1010 }
1011
1012 HORZCLOSE_TRANSITION(8, uint8_t, 1)
1013 HORZCLOSE_TRANSITION(16, uint16_t, 2)
1014
1015 static float frand(int x, int y)
1016 {
1017     const float r = sinf(x * 12.9898f + y * 78.233f) * 43758.545f;
1018
1019     return r - floorf(r);
1020 }
1021
1022 #define DISSOLVE_TRANSITION(name, type, div)                                         \
1023 static void dissolve##name##_transition(AVFilterContext *ctx,                        \
1024                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
1025                             float progress,                                          \
1026                             int slice_start, int slice_end, int jobnr)               \
1027 {                                                                                    \
1028     XFadeContext *s = ctx->priv;                                                     \
1029     const int width = out->width;                                                    \
1030                                                                                      \
1031     for (int y = slice_start; y < slice_end; y++) {                                  \
1032         for (int x = 0; x < width; x++) {                                            \
1033             const float smooth = frand(x, y) * 2.f + progress * 2.f - 1.5f;          \
1034             for (int p = 0; p < s->nb_planes; p++) {                                 \
1035                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
1036                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
1037                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
1038                                                                                      \
1039                 dst[x] = smooth >= 0.5f ? xf0[x] : xf1[x];                           \
1040             }                                                                        \
1041         }                                                                            \
1042     }                                                                                \
1043 }
1044
1045 DISSOLVE_TRANSITION(8, uint8_t, 1)
1046 DISSOLVE_TRANSITION(16, uint16_t, 2)
1047
1048 #define PIXELIZE_TRANSITION(name, type, div)                                         \
1049 static void pixelize##name##_transition(AVFilterContext *ctx,                        \
1050                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
1051                             float progress,                                          \
1052                             int slice_start, int slice_end, int jobnr)               \
1053 {                                                                                    \
1054     XFadeContext *s = ctx->priv;                                                     \
1055     const int w = out->width;                                                        \
1056     const int h = out->height;                                                       \
1057     const float d = fminf(progress, 1.f - progress);                                 \
1058     const float dist = ceilf(d * 50.f) / 50.f;                                       \
1059     const float sqx = 2.f * dist * FFMIN(w, h) / 20.f;                               \
1060     const float sqy = 2.f * dist * FFMIN(w, h) / 20.f;                               \
1061                                                                                      \
1062     for (int y = slice_start; y < slice_end; y++) {                                  \
1063         for (int x = 0; x < w; x++) {                                                \
1064             int sx = dist > 0.f ? FFMIN((floorf(x / sqx) + .5f) * sqx, w - 1) : x;   \
1065             int sy = dist > 0.f ? FFMIN((floorf(y / sqy) + .5f) * sqy, h - 1) : y;   \
1066             for (int p = 0; p < s->nb_planes; p++) {                                 \
1067                 const type *xf0 = (const type *)(a->data[p] + sy * a->linesize[p]);  \
1068                 const type *xf1 = (const type *)(b->data[p] + sy * b->linesize[p]);  \
1069                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
1070                                                                                      \
1071                 dst[x] = mix(xf0[sx], xf1[sx], progress);                            \
1072             }                                                                        \
1073         }                                                                            \
1074     }                                                                                \
1075 }
1076
1077 PIXELIZE_TRANSITION(8, uint8_t, 1)
1078 PIXELIZE_TRANSITION(16, uint16_t, 2)
1079
1080 #define DIAGTL_TRANSITION(name, type, div)                                           \
1081 static void diagtl##name##_transition(AVFilterContext *ctx,                          \
1082                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
1083                             float progress,                                          \
1084                             int slice_start, int slice_end, int jobnr)               \
1085 {                                                                                    \
1086     XFadeContext *s = ctx->priv;                                                     \
1087     const int width = out->width;                                                    \
1088     const float w = width;                                                           \
1089     const float h = out->height;                                                     \
1090                                                                                      \
1091     for (int y = slice_start; y < slice_end; y++) {                                  \
1092         for (int x = 0; x < width; x++) {                                            \
1093             const float smooth = 1.f + x / w * y / h - progress * 2.f;               \
1094                                                                                      \
1095             for (int p = 0; p < s->nb_planes; p++) {                                 \
1096                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
1097                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
1098                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
1099                                                                                      \
1100                 dst[x] = mix(xf1[x], xf0[x], smoothstep(0.f, 1.f, smooth));          \
1101             }                                                                        \
1102         }                                                                            \
1103     }                                                                                \
1104 }
1105
1106 DIAGTL_TRANSITION(8, uint8_t, 1)
1107 DIAGTL_TRANSITION(16, uint16_t, 2)
1108
1109 #define DIAGTR_TRANSITION(name, type, div)                                           \
1110 static void diagtr##name##_transition(AVFilterContext *ctx,                          \
1111                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
1112                             float progress,                                          \
1113                             int slice_start, int slice_end, int jobnr)               \
1114 {                                                                                    \
1115     XFadeContext *s = ctx->priv;                                                     \
1116     const int width = out->width;                                                    \
1117     const float w = width;                                                           \
1118     const float h = out->height;                                                     \
1119                                                                                      \
1120     for (int y = slice_start; y < slice_end; y++) {                                  \
1121         for (int x = 0; x < width; x++) {                                            \
1122             const float smooth = 1.f + (w - 1 - x) / w * y / h - progress * 2.f;     \
1123                                                                                      \
1124             for (int p = 0; p < s->nb_planes; p++) {                                 \
1125                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
1126                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
1127                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
1128                                                                                      \
1129                 dst[x] = mix(xf1[x], xf0[x], smoothstep(0.f, 1.f, smooth));          \
1130             }                                                                        \
1131         }                                                                            \
1132     }                                                                                \
1133 }
1134
1135 DIAGTR_TRANSITION(8, uint8_t, 1)
1136 DIAGTR_TRANSITION(16, uint16_t, 2)
1137
1138 #define DIAGBL_TRANSITION(name, type, div)                                           \
1139 static void diagbl##name##_transition(AVFilterContext *ctx,                          \
1140                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
1141                             float progress,                                          \
1142                             int slice_start, int slice_end, int jobnr)               \
1143 {                                                                                    \
1144     XFadeContext *s = ctx->priv;                                                     \
1145     const int width = out->width;                                                    \
1146     const float w = width;                                                           \
1147     const float h = out->height;                                                     \
1148                                                                                      \
1149     for (int y = slice_start; y < slice_end; y++) {                                  \
1150         for (int x = 0; x < width; x++) {                                            \
1151             const float smooth = 1.f + x / w * (h - 1 - y) / h - progress * 2.f;     \
1152                                                                                      \
1153             for (int p = 0; p < s->nb_planes; p++) {                                 \
1154                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
1155                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
1156                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
1157                                                                                      \
1158                 dst[x] = mix(xf1[x], xf0[x], smoothstep(0.f, 1.f, smooth));          \
1159             }                                                                        \
1160         }                                                                            \
1161     }                                                                                \
1162 }
1163
1164 DIAGBL_TRANSITION(8, uint8_t, 1)
1165 DIAGBL_TRANSITION(16, uint16_t, 2)
1166
1167 #define DIAGBR_TRANSITION(name, type, div)                                           \
1168 static void diagbr##name##_transition(AVFilterContext *ctx,                          \
1169                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
1170                             float progress,                                          \
1171                             int slice_start, int slice_end, int jobnr)               \
1172 {                                                                                    \
1173     XFadeContext *s = ctx->priv;                                                     \
1174     const int width = out->width;                                                    \
1175     const float w = width;                                                           \
1176     const float h = out->height;                                                     \
1177                                                                                      \
1178     for (int y = slice_start; y < slice_end; y++) {                                  \
1179         for (int x = 0; x < width; x++) {                                            \
1180             const float smooth = 1.f + (w - 1 - x) / w * (h - 1 - y) / h -           \
1181                                  progress * 2.f;                                     \
1182                                                                                      \
1183             for (int p = 0; p < s->nb_planes; p++) {                                 \
1184                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
1185                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
1186                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
1187                                                                                      \
1188                 dst[x] = mix(xf1[x], xf0[x], smoothstep(0.f, 1.f, smooth));          \
1189             }                                                                        \
1190         }                                                                            \
1191     }                                                                                \
1192 }
1193
1194 DIAGBR_TRANSITION(8, uint8_t, 1)
1195 DIAGBR_TRANSITION(16, uint16_t, 2)
1196
1197 #define HLSLICE_TRANSITION(name, type, div)                                          \
1198 static void hlslice##name##_transition(AVFilterContext *ctx,                         \
1199                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
1200                             float progress,                                          \
1201                             int slice_start, int slice_end, int jobnr)               \
1202 {                                                                                    \
1203     XFadeContext *s = ctx->priv;                                                     \
1204     const int width = out->width;                                                    \
1205     const float w = width;                                                           \
1206                                                                                      \
1207     for (int y = slice_start; y < slice_end; y++) {                                  \
1208         for (int x = 0; x < width; x++) {                                            \
1209             const float smooth = smoothstep(-0.5f, 0.f, x / w - progress * 1.5f);    \
1210             const float ss = smooth <= fract(10.f * x / w) ? 0.f : 1.f;              \
1211                                                                                      \
1212             for (int p = 0; p < s->nb_planes; p++) {                                 \
1213                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
1214                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
1215                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
1216                                                                                      \
1217                 dst[x] = mix(xf1[x], xf0[x], ss);                                    \
1218             }                                                                        \
1219         }                                                                            \
1220     }                                                                                \
1221 }
1222
1223 HLSLICE_TRANSITION(8, uint8_t, 1)
1224 HLSLICE_TRANSITION(16, uint16_t, 2)
1225
1226 #define HRSLICE_TRANSITION(name, type, div)                                          \
1227 static void hrslice##name##_transition(AVFilterContext *ctx,                         \
1228                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
1229                             float progress,                                          \
1230                             int slice_start, int slice_end, int jobnr)               \
1231 {                                                                                    \
1232     XFadeContext *s = ctx->priv;                                                     \
1233     const int width = out->width;                                                    \
1234     const float w = width;                                                           \
1235                                                                                      \
1236     for (int y = slice_start; y < slice_end; y++) {                                  \
1237         for (int x = 0; x < width; x++) {                                            \
1238             const float xx = (w - 1 - x) / w;                                        \
1239             const float smooth = smoothstep(-0.5f, 0.f, xx - progress * 1.5f);       \
1240             const float ss = smooth <= fract(10.f * xx) ? 0.f : 1.f;                 \
1241                                                                                      \
1242             for (int p = 0; p < s->nb_planes; p++) {                                 \
1243                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
1244                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
1245                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
1246                                                                                      \
1247                 dst[x] = mix(xf1[x], xf0[x], ss);                                    \
1248             }                                                                        \
1249         }                                                                            \
1250     }                                                                                \
1251 }
1252
1253 HRSLICE_TRANSITION(8, uint8_t, 1)
1254 HRSLICE_TRANSITION(16, uint16_t, 2)
1255
1256 #define VUSLICE_TRANSITION(name, type, div)                                          \
1257 static void vuslice##name##_transition(AVFilterContext *ctx,                         \
1258                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
1259                             float progress,                                          \
1260                             int slice_start, int slice_end, int jobnr)               \
1261 {                                                                                    \
1262     XFadeContext *s = ctx->priv;                                                     \
1263     const int width = out->width;                                                    \
1264     const float h = out->height;                                                     \
1265                                                                                      \
1266     for (int y = slice_start; y < slice_end; y++) {                                  \
1267          const float smooth = smoothstep(-0.5f, 0.f, y / h - progress * 1.5f);       \
1268          const float ss = smooth <= fract(10.f * y / h) ? 0.f : 1.f;                 \
1269                                                                                      \
1270          for (int x = 0; x < width; x++) {                                           \
1271             for (int p = 0; p < s->nb_planes; p++) {                                 \
1272                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
1273                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
1274                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
1275                                                                                      \
1276                 dst[x] = mix(xf1[x], xf0[x], ss);                                    \
1277             }                                                                        \
1278         }                                                                            \
1279     }                                                                                \
1280 }
1281
1282 VUSLICE_TRANSITION(8, uint8_t, 1)
1283 VUSLICE_TRANSITION(16, uint16_t, 2)
1284
1285 #define VDSLICE_TRANSITION(name, type, div)                                          \
1286 static void vdslice##name##_transition(AVFilterContext *ctx,                         \
1287                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
1288                             float progress,                                          \
1289                             int slice_start, int slice_end, int jobnr)               \
1290 {                                                                                    \
1291     XFadeContext *s = ctx->priv;                                                     \
1292     const int width = out->width;                                                    \
1293     const float h = out->height;                                                     \
1294                                                                                      \
1295     for (int y = slice_start; y < slice_end; y++) {                                  \
1296          const float yy = (h - 1 - y) / h;                                           \
1297          const float smooth = smoothstep(-0.5f, 0.f, yy - progress * 1.5f);          \
1298          const float ss = smooth <= fract(10.f * yy) ? 0.f : 1.f;                    \
1299                                                                                      \
1300          for (int x = 0; x < width; x++) {                                           \
1301             for (int p = 0; p < s->nb_planes; p++) {                                 \
1302                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
1303                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
1304                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
1305                                                                                      \
1306                 dst[x] = mix(xf1[x], xf0[x], ss);                                    \
1307             }                                                                        \
1308         }                                                                            \
1309     }                                                                                \
1310 }
1311
1312 VDSLICE_TRANSITION(8, uint8_t, 1)
1313 VDSLICE_TRANSITION(16, uint16_t, 2)
1314
1315 #define HBLUR_TRANSITION(name, type, div)                                            \
1316 static void hblur##name##_transition(AVFilterContext *ctx,                           \
1317                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
1318                             float progress,                                          \
1319                             int slice_start, int slice_end, int jobnr)               \
1320 {                                                                                    \
1321     XFadeContext *s = ctx->priv;                                                     \
1322     const int width = out->width;                                                    \
1323     const float prog = progress <= 0.5f ? progress * 2.f : (1.f - progress) * 2.f;   \
1324     const int size = 1 + (width / 2) * prog;                                         \
1325                                                                                      \
1326     for (int y = slice_start; y < slice_end; y++) {                                  \
1327         for (int p = 0; p < s->nb_planes; p++) {                                     \
1328             const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);       \
1329             const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);       \
1330             type *dst = (type *)(out->data[p] + y * out->linesize[p]);               \
1331             float sum0 = 0.f;                                                        \
1332             float sum1 = 0.f;                                                        \
1333             float cnt = size;                                                        \
1334                                                                                      \
1335             for (int x = 0; x < size; x++) {                                         \
1336                 sum0 += xf0[x];                                                      \
1337                 sum1 += xf1[x];                                                      \
1338             }                                                                        \
1339                                                                                      \
1340             for (int x = 0; x < width; x++) {                                        \
1341                 dst[x] = mix(sum0 / cnt, sum1 / cnt, progress);                      \
1342                                                                                      \
1343                 if (x + size < width) {                                              \
1344                     sum0 += xf0[x + size] - xf0[x];                                  \
1345                     sum1 += xf1[x + size] - xf1[x];                                  \
1346                 } else {                                                             \
1347                     sum0 -= xf0[x];                                                  \
1348                     sum1 -= xf1[x];                                                  \
1349                     cnt--;                                                           \
1350                 }                                                                    \
1351             }                                                                        \
1352         }                                                                            \
1353     }                                                                                \
1354 }
1355
1356 HBLUR_TRANSITION(8, uint8_t, 1)
1357 HBLUR_TRANSITION(16, uint16_t, 2)
1358
1359 #define FADEGRAYS_TRANSITION(name, type, div)                                        \
1360 static void fadegrays##name##_transition(AVFilterContext *ctx,                       \
1361                             const AVFrame *a, const AVFrame *b, AVFrame *out,        \
1362                             float progress,                                          \
1363                             int slice_start, int slice_end, int jobnr)               \
1364 {                                                                                    \
1365     XFadeContext *s = ctx->priv;                                                     \
1366     const int width = out->width;                                                    \
1367     const int is_rgb = s->is_rgb;                                                    \
1368     const int mid = (s->max_value + 1) / 2;                                          \
1369     const float phase = 0.2f;                                                        \
1370                                                                                      \
1371     for (int y = slice_start; y < slice_end; y++) {                                  \
1372         for (int x = 0; x < width; x++) {                                            \
1373             int bg[2][4];                                                            \
1374             if (is_rgb) {                                                            \
1375                 for (int p = 0; p < s->nb_planes; p++) {                             \
1376                     const type *xf0 = (const type *)(a->data[p] +                    \
1377                                                      y * a->linesize[p]);            \
1378                     const type *xf1 = (const type *)(b->data[p] +                    \
1379                                                      y * b->linesize[p]);            \
1380                     if (p == 3) {                                                    \
1381                         bg[0][3] = xf0[x];                                           \
1382                         bg[1][3] = xf1[x];                                           \
1383                     } else  {                                                        \
1384                         bg[0][0] += xf0[x];                                          \
1385                         bg[1][0] += xf1[x];                                          \
1386                     }                                                                \
1387                 }                                                                    \
1388                 bg[0][0] = bg[0][0] / 3;                                             \
1389                 bg[1][0] = bg[1][0] / 3;                                             \
1390                 bg[0][1] = bg[0][2] = bg[0][0];                                      \
1391                 bg[1][1] = bg[1][2] = bg[1][0];                                      \
1392             } else {                                                                 \
1393                 const type *yf0 = (const type *)(a->data[0] +                        \
1394                                                  y * a->linesize[0]);                \
1395                 const type *yf1 = (const type *)(b->data[0] +                        \
1396                                                  y * a->linesize[0]);                \
1397                 bg[0][0] = yf0[x];                                                   \
1398                 bg[1][0] = yf1[x];                                                   \
1399                 if (s->nb_planes == 4) {                                             \
1400                     const type *af0 = (const type *)(a->data[3] +                    \
1401                                                      y * a->linesize[3]);            \
1402                     const type *af1 = (const type *)(b->data[3] +                    \
1403                                                      y * a->linesize[3]);            \
1404                     bg[0][3] = af0[x];                                               \
1405                     bg[1][3] = af1[x];                                               \
1406                 }                                                                    \
1407                 bg[0][1] = bg[1][1] = mid;                                           \
1408                 bg[0][2] = bg[1][2] = mid;                                           \
1409             }                                                                        \
1410                                                                                      \
1411             for (int p = 0; p < s->nb_planes; p++) {                                 \
1412                 const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]);   \
1413                 const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]);   \
1414                 type *dst = (type *)(out->data[p] + y * out->linesize[p]);           \
1415                                                                                      \
1416                 dst[x] = mix(mix(xf0[x], bg[0][p],                                   \
1417                                  smoothstep(1.f-phase, 1.f, progress)),              \
1418                          mix(bg[1][p], xf1[x], smoothstep(phase, 1.f, progress)),    \
1419                              progress);                                              \
1420             }                                                                        \
1421         }                                                                            \
1422     }                                                                                \
1423 }
1424
1425 FADEGRAYS_TRANSITION(8, uint8_t, 1)
1426 FADEGRAYS_TRANSITION(16, uint16_t, 2)
1427
1428 #define WIPETL_TRANSITION(name, type, div)                                           \
1429 static void wipetl##name##_transition(AVFilterContext *ctx,                          \
1430                                 const AVFrame *a, const AVFrame *b, AVFrame *out,    \
1431                                 float progress,                                      \
1432                                 int slice_start, int slice_end, int jobnr)           \
1433 {                                                                                    \
1434     XFadeContext *s = ctx->priv;                                                     \
1435     const int height = slice_end - slice_start;                                      \
1436     const int zw = out->width * progress;                                            \
1437     const int zh = out->height * progress;                                           \
1438                                                                                      \
1439     for (int p = 0; p < s->nb_planes; p++) {                                         \
1440         const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
1441         const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
1442         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);         \
1443                                                                                      \
1444         for (int y = 0; y < height; y++) {                                           \
1445             for (int x = 0; x < out->width; x++) {                                   \
1446                 dst[x] = slice_start + y <= zh &&                                    \
1447                          x <= zw ? xf0[x] : xf1[x];                                  \
1448             }                                                                        \
1449                                                                                      \
1450             dst += out->linesize[p] / div;                                           \
1451             xf0 += a->linesize[p] / div;                                             \
1452             xf1 += b->linesize[p] / div;                                             \
1453         }                                                                            \
1454     }                                                                                \
1455 }
1456
1457 WIPETL_TRANSITION(8, uint8_t, 1)
1458 WIPETL_TRANSITION(16, uint16_t, 2)
1459
1460 #define WIPETR_TRANSITION(name, type, div)                                           \
1461 static void wipetr##name##_transition(AVFilterContext *ctx,                          \
1462                                 const AVFrame *a, const AVFrame *b, AVFrame *out,    \
1463                                 float progress,                                      \
1464                                 int slice_start, int slice_end, int jobnr)           \
1465 {                                                                                    \
1466     XFadeContext *s = ctx->priv;                                                     \
1467     const int height = slice_end - slice_start;                                      \
1468     const int zw = out->width * (1.f - progress);                                    \
1469     const int zh = out->height * progress;                                           \
1470                                                                                      \
1471     for (int p = 0; p < s->nb_planes; p++) {                                         \
1472         const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
1473         const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
1474         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);         \
1475                                                                                      \
1476         for (int y = 0; y < height; y++) {                                           \
1477             for (int x = 0; x < out->width; x++) {                                   \
1478                 dst[x] = slice_start + y <= zh &&                                    \
1479                          x > zw ? xf0[x] : xf1[x];                                   \
1480             }                                                                        \
1481                                                                                      \
1482             dst += out->linesize[p] / div;                                           \
1483             xf0 += a->linesize[p] / div;                                             \
1484             xf1 += b->linesize[p] / div;                                             \
1485         }                                                                            \
1486     }                                                                                \
1487 }
1488
1489 WIPETR_TRANSITION(8, uint8_t, 1)
1490 WIPETR_TRANSITION(16, uint16_t, 2)
1491
1492 #define WIPEBL_TRANSITION(name, type, div)                                           \
1493 static void wipebl##name##_transition(AVFilterContext *ctx,                          \
1494                                 const AVFrame *a, const AVFrame *b, AVFrame *out,    \
1495                                 float progress,                                      \
1496                                 int slice_start, int slice_end, int jobnr)           \
1497 {                                                                                    \
1498     XFadeContext *s = ctx->priv;                                                     \
1499     const int height = slice_end - slice_start;                                      \
1500     const int zw = out->width * progress;                                            \
1501     const int zh = out->height * (1.f - progress);                                   \
1502                                                                                      \
1503     for (int p = 0; p < s->nb_planes; p++) {                                         \
1504         const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
1505         const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
1506         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);         \
1507                                                                                      \
1508         for (int y = 0; y < height; y++) {                                           \
1509             for (int x = 0; x < out->width; x++) {                                   \
1510                 dst[x] = slice_start + y > zh &&                                     \
1511                          x <= zw ? xf0[x] : xf1[x];                                  \
1512             }                                                                        \
1513                                                                                      \
1514             dst += out->linesize[p] / div;                                           \
1515             xf0 += a->linesize[p] / div;                                             \
1516             xf1 += b->linesize[p] / div;                                             \
1517         }                                                                            \
1518     }                                                                                \
1519 }
1520
1521 WIPEBL_TRANSITION(8, uint8_t, 1)
1522 WIPEBL_TRANSITION(16, uint16_t, 2)
1523
1524 #define WIPEBR_TRANSITION(name, type, div)                                           \
1525 static void wipebr##name##_transition(AVFilterContext *ctx,                          \
1526                                 const AVFrame *a, const AVFrame *b, AVFrame *out,    \
1527                                 float progress,                                      \
1528                                 int slice_start, int slice_end, int jobnr)           \
1529 {                                                                                    \
1530     XFadeContext *s = ctx->priv;                                                     \
1531     const int height = slice_end - slice_start;                                      \
1532     const int zh = out->height * (1.f - progress);                                   \
1533     const int zw = out->width * (1.f - progress);                                    \
1534                                                                                      \
1535     for (int p = 0; p < s->nb_planes; p++) {                                         \
1536         const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
1537         const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
1538         type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]);         \
1539                                                                                      \
1540         for (int y = 0; y < height; y++) {                                           \
1541             for (int x = 0; x < out->width; x++) {                                   \
1542                 dst[x] = slice_start + y > zh &&                                     \
1543                          x > zw ? xf0[x] : xf1[x];                                   \
1544             }                                                                        \
1545                                                                                      \
1546             dst += out->linesize[p] / div;                                           \
1547             xf0 += a->linesize[p] / div;                                             \
1548             xf1 += b->linesize[p] / div;                                             \
1549         }                                                                            \
1550     }                                                                                \
1551 }
1552
1553 WIPEBR_TRANSITION(8, uint8_t, 1)
1554 WIPEBR_TRANSITION(16, uint16_t, 2)
1555
1556 static inline double getpix(void *priv, double x, double y, int plane, int nb)
1557 {
1558     XFadeContext *s = priv;
1559     AVFrame *in = s->xf[nb];
1560     const uint8_t *src = in->data[FFMIN(plane, s->nb_planes - 1)];
1561     int linesize = in->linesize[FFMIN(plane, s->nb_planes - 1)];
1562     const int w = in->width;
1563     const int h = in->height;
1564
1565     int xi, yi;
1566
1567     xi = av_clipd(x, 0, w - 1);
1568     yi = av_clipd(y, 0, h - 1);
1569
1570     if (s->depth > 8) {
1571         const uint16_t *src16 = (const uint16_t*)src;
1572
1573         linesize /= 2;
1574         return src16[xi + yi * linesize];
1575     } else {
1576         return src[xi + yi * linesize];
1577     }
1578 }
1579
1580 static double a0(void *priv, double x, double y) { return getpix(priv, x, y, 0, 0); }
1581 static double a1(void *priv, double x, double y) { return getpix(priv, x, y, 1, 0); }
1582 static double a2(void *priv, double x, double y) { return getpix(priv, x, y, 2, 0); }
1583 static double a3(void *priv, double x, double y) { return getpix(priv, x, y, 3, 0); }
1584
1585 static double b0(void *priv, double x, double y) { return getpix(priv, x, y, 0, 1); }
1586 static double b1(void *priv, double x, double y) { return getpix(priv, x, y, 1, 1); }
1587 static double b2(void *priv, double x, double y) { return getpix(priv, x, y, 2, 1); }
1588 static double b3(void *priv, double x, double y) { return getpix(priv, x, y, 3, 1); }
1589
1590 static int config_output(AVFilterLink *outlink)
1591 {
1592     AVFilterContext *ctx = outlink->src;
1593     AVFilterLink *inlink0 = ctx->inputs[0];
1594     AVFilterLink *inlink1 = ctx->inputs[1];
1595     XFadeContext *s = ctx->priv;
1596     const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink0->format);
1597
1598     if (inlink0->format != inlink1->format) {
1599         av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
1600         return AVERROR(EINVAL);
1601     }
1602     if (inlink0->w != inlink1->w || inlink0->h != inlink1->h) {
1603         av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
1604                "(size %dx%d) do not match the corresponding "
1605                "second input link %s parameters (size %dx%d)\n",
1606                ctx->input_pads[0].name, inlink0->w, inlink0->h,
1607                ctx->input_pads[1].name, inlink1->w, inlink1->h);
1608         return AVERROR(EINVAL);
1609     }
1610
1611     if (inlink0->time_base.num != inlink1->time_base.num ||
1612         inlink0->time_base.den != inlink1->time_base.den) {
1613         av_log(ctx, AV_LOG_ERROR, "First input link %s timebase "
1614                "(%d/%d) do not match the corresponding "
1615                "second input link %s timebase (%d/%d)\n",
1616                ctx->input_pads[0].name, inlink0->time_base.num, inlink0->time_base.den,
1617                ctx->input_pads[1].name, inlink1->time_base.num, inlink1->time_base.den);
1618         return AVERROR(EINVAL);
1619     }
1620
1621     if (!inlink0->frame_rate.num || !inlink0->frame_rate.den) {
1622         av_log(ctx, AV_LOG_ERROR, "The inputs needs to be a constant frame rate; "
1623                "current rate of %d/%d is invalid\n", inlink0->frame_rate.num, inlink0->frame_rate.den);
1624         return AVERROR(EINVAL);
1625     }
1626
1627     if (inlink0->frame_rate.num != inlink1->frame_rate.num ||
1628         inlink0->frame_rate.den != inlink1->frame_rate.den) {
1629         av_log(ctx, AV_LOG_ERROR, "First input link %s frame rate "
1630                "(%d/%d) do not match the corresponding "
1631                "second input link %s frame rate (%d/%d)\n",
1632                ctx->input_pads[0].name, inlink0->frame_rate.num, inlink0->frame_rate.den,
1633                ctx->input_pads[1].name, inlink1->frame_rate.num, inlink1->frame_rate.den);
1634         return AVERROR(EINVAL);
1635     }
1636
1637     outlink->w = inlink0->w;
1638     outlink->h = inlink0->h;
1639     outlink->time_base = inlink0->time_base;
1640     outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
1641     outlink->frame_rate = inlink0->frame_rate;
1642
1643     s->depth = pix_desc->comp[0].depth;
1644     s->is_rgb = !!(pix_desc->flags & AV_PIX_FMT_FLAG_RGB);
1645     s->nb_planes = av_pix_fmt_count_planes(inlink0->format);
1646     s->max_value = (1 << s->depth) - 1;
1647     s->black[0] = 0;
1648     s->black[1] = s->black[2] = s->is_rgb ? 0 : s->max_value / 2;
1649     s->black[3] = s->max_value;
1650     s->white[0] = s->white[3] = s->max_value;
1651     s->white[1] = s->white[2] = s->is_rgb ? s->max_value : s->max_value / 2;
1652
1653     s->first_pts = s->last_pts = s->pts = AV_NOPTS_VALUE;
1654
1655     if (s->duration)
1656         s->duration_pts = av_rescale_q(s->duration, AV_TIME_BASE_Q, outlink->time_base);
1657     if (s->offset)
1658         s->offset_pts = av_rescale_q(s->offset, AV_TIME_BASE_Q, outlink->time_base);
1659
1660     switch (s->transition) {
1661     case CUSTOM:     s->transitionf = s->depth <= 8 ? custom8_transition     : custom16_transition;     break;
1662     case FADE:       s->transitionf = s->depth <= 8 ? fade8_transition       : fade16_transition;       break;
1663     case WIPELEFT:   s->transitionf = s->depth <= 8 ? wipeleft8_transition   : wipeleft16_transition;   break;
1664     case WIPERIGHT:  s->transitionf = s->depth <= 8 ? wiperight8_transition  : wiperight16_transition;  break;
1665     case WIPEUP:     s->transitionf = s->depth <= 8 ? wipeup8_transition     : wipeup16_transition;     break;
1666     case WIPEDOWN:   s->transitionf = s->depth <= 8 ? wipedown8_transition   : wipedown16_transition;   break;
1667     case SLIDELEFT:  s->transitionf = s->depth <= 8 ? slideleft8_transition  : slideleft16_transition;  break;
1668     case SLIDERIGHT: s->transitionf = s->depth <= 8 ? slideright8_transition : slideright16_transition; break;
1669     case SLIDEUP:    s->transitionf = s->depth <= 8 ? slideup8_transition    : slideup16_transition;    break;
1670     case SLIDEDOWN:  s->transitionf = s->depth <= 8 ? slidedown8_transition  : slidedown16_transition;  break;
1671     case CIRCLECROP: s->transitionf = s->depth <= 8 ? circlecrop8_transition : circlecrop16_transition; break;
1672     case RECTCROP:   s->transitionf = s->depth <= 8 ? rectcrop8_transition   : rectcrop16_transition;   break;
1673     case DISTANCE:   s->transitionf = s->depth <= 8 ? distance8_transition   : distance16_transition;   break;
1674     case FADEBLACK:  s->transitionf = s->depth <= 8 ? fadeblack8_transition  : fadeblack16_transition;  break;
1675     case FADEWHITE:  s->transitionf = s->depth <= 8 ? fadewhite8_transition  : fadewhite16_transition;  break;
1676     case RADIAL:     s->transitionf = s->depth <= 8 ? radial8_transition     : radial16_transition;     break;
1677     case SMOOTHLEFT: s->transitionf = s->depth <= 8 ? smoothleft8_transition : smoothleft16_transition; break;
1678     case SMOOTHRIGHT:s->transitionf = s->depth <= 8 ? smoothright8_transition: smoothright16_transition;break;
1679     case SMOOTHUP:   s->transitionf = s->depth <= 8 ? smoothup8_transition   : smoothup16_transition;   break;
1680     case SMOOTHDOWN: s->transitionf = s->depth <= 8 ? smoothdown8_transition : smoothdown16_transition; break;
1681     case CIRCLEOPEN: s->transitionf = s->depth <= 8 ? circleopen8_transition : circleopen16_transition; break;
1682     case CIRCLECLOSE:s->transitionf = s->depth <= 8 ? circleclose8_transition: circleclose16_transition;break;
1683     case VERTOPEN:   s->transitionf = s->depth <= 8 ? vertopen8_transition   : vertopen16_transition;   break;
1684     case VERTCLOSE:  s->transitionf = s->depth <= 8 ? vertclose8_transition  : vertclose16_transition;  break;
1685     case HORZOPEN:   s->transitionf = s->depth <= 8 ? horzopen8_transition   : horzopen16_transition;   break;
1686     case HORZCLOSE:  s->transitionf = s->depth <= 8 ? horzclose8_transition  : horzclose16_transition;  break;
1687     case DISSOLVE:   s->transitionf = s->depth <= 8 ? dissolve8_transition   : dissolve16_transition;   break;
1688     case PIXELIZE:   s->transitionf = s->depth <= 8 ? pixelize8_transition   : pixelize16_transition;   break;
1689     case DIAGTL:     s->transitionf = s->depth <= 8 ? diagtl8_transition     : diagtl16_transition;     break;
1690     case DIAGTR:     s->transitionf = s->depth <= 8 ? diagtr8_transition     : diagtr16_transition;     break;
1691     case DIAGBL:     s->transitionf = s->depth <= 8 ? diagbl8_transition     : diagbl16_transition;     break;
1692     case DIAGBR:     s->transitionf = s->depth <= 8 ? diagbr8_transition     : diagbr16_transition;     break;
1693     case HLSLICE:    s->transitionf = s->depth <= 8 ? hlslice8_transition    : hlslice16_transition;    break;
1694     case HRSLICE:    s->transitionf = s->depth <= 8 ? hrslice8_transition    : hrslice16_transition;    break;
1695     case VUSLICE:    s->transitionf = s->depth <= 8 ? vuslice8_transition    : vuslice16_transition;    break;
1696     case VDSLICE:    s->transitionf = s->depth <= 8 ? vdslice8_transition    : vdslice16_transition;    break;
1697     case HBLUR:      s->transitionf = s->depth <= 8 ? hblur8_transition      : hblur16_transition;      break;
1698     case FADEGRAYS:  s->transitionf = s->depth <= 8 ? fadegrays8_transition  : fadegrays16_transition;  break;
1699     case WIPETL:     s->transitionf = s->depth <= 8 ? wipetl8_transition     : wipetl16_transition;     break;
1700     case WIPETR:     s->transitionf = s->depth <= 8 ? wipetr8_transition     : wipetr16_transition;     break;
1701     case WIPEBL:     s->transitionf = s->depth <= 8 ? wipebl8_transition     : wipebl16_transition;     break;
1702     case WIPEBR:     s->transitionf = s->depth <= 8 ? wipebr8_transition     : wipebr16_transition;     break;
1703     }
1704
1705     if (s->transition == CUSTOM) {
1706         static const char *const func2_names[]    = {
1707             "a0", "a1", "a2", "a3",
1708             "b0", "b1", "b2", "b3",
1709             NULL
1710         };
1711         double (*func2[])(void *, double, double) = {
1712             a0, a1, a2, a3,
1713             b0, b1, b2, b3,
1714             NULL };
1715         int ret;
1716
1717         if (!s->custom_str)
1718             return AVERROR(EINVAL);
1719         ret = av_expr_parse(&s->e, s->custom_str, var_names,
1720                             NULL, NULL, func2_names, func2, 0, ctx);
1721         if (ret < 0)
1722             return ret;
1723     }
1724
1725     return 0;
1726 }
1727
1728 static int xfade_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
1729 {
1730     XFadeContext *s = ctx->priv;
1731     AVFilterLink *outlink = ctx->outputs[0];
1732     ThreadData *td = arg;
1733     int slice_start = (outlink->h *  jobnr   ) / nb_jobs;
1734     int slice_end   = (outlink->h * (jobnr+1)) / nb_jobs;
1735
1736     s->transitionf(ctx, td->xf[0], td->xf[1], td->out, td->progress, slice_start, slice_end, jobnr);
1737
1738     return 0;
1739 }
1740
1741 static int xfade_frame(AVFilterContext *ctx, AVFrame *a, AVFrame *b)
1742 {
1743     XFadeContext *s = ctx->priv;
1744     AVFilterLink *outlink = ctx->outputs[0];
1745     float progress = av_clipf(1.f - ((float)(s->pts - s->first_pts - s->offset_pts) / s->duration_pts), 0.f, 1.f);
1746     ThreadData td;
1747     AVFrame *out;
1748
1749     out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
1750     if (!out)
1751         return AVERROR(ENOMEM);
1752
1753     td.xf[0] = a, td.xf[1] = b, td.out = out, td.progress = progress;
1754     ctx->internal->execute(ctx, xfade_slice, &td, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
1755
1756     out->pts = s->pts;
1757
1758     return ff_filter_frame(outlink, out);
1759 }
1760
1761 static int xfade_activate(AVFilterContext *ctx)
1762 {
1763     XFadeContext *s = ctx->priv;
1764     AVFilterLink *outlink = ctx->outputs[0];
1765     AVFrame *in = NULL;
1766     int ret = 0, status;
1767     int64_t pts;
1768
1769     FF_FILTER_FORWARD_STATUS_BACK_ALL(outlink, ctx);
1770
1771     if (s->xfade_is_over) {
1772         ret = ff_inlink_consume_frame(ctx->inputs[1], &in);
1773         if (ret < 0) {
1774             return ret;
1775         } else if (ret > 0) {
1776             in->pts = (in->pts - s->last_pts) + s->pts;
1777             return ff_filter_frame(outlink, in);
1778         } else if (ff_inlink_acknowledge_status(ctx->inputs[1], &status, &pts)) {
1779             ff_outlink_set_status(outlink, status, s->pts);
1780             return 0;
1781         } else if (!ret) {
1782             if (ff_outlink_frame_wanted(outlink)) {
1783                 ff_inlink_request_frame(ctx->inputs[1]);
1784                 return 0;
1785             }
1786         }
1787     }
1788
1789     if (ff_inlink_queued_frames(ctx->inputs[0]) > 0) {
1790         s->xf[0] = ff_inlink_peek_frame(ctx->inputs[0], 0);
1791         if (s->xf[0]) {
1792             if (s->first_pts == AV_NOPTS_VALUE) {
1793                 s->first_pts = s->xf[0]->pts;
1794             }
1795             s->pts = s->xf[0]->pts;
1796             if (s->first_pts + s->offset_pts > s->xf[0]->pts) {
1797                 s->xf[0] = NULL;
1798                 s->need_second = 0;
1799                 ff_inlink_consume_frame(ctx->inputs[0], &in);
1800                 return ff_filter_frame(outlink, in);
1801             }
1802
1803             s->need_second = 1;
1804         }
1805     }
1806
1807     if (s->xf[0] && ff_inlink_queued_frames(ctx->inputs[1]) > 0) {
1808         ff_inlink_consume_frame(ctx->inputs[0], &s->xf[0]);
1809         ff_inlink_consume_frame(ctx->inputs[1], &s->xf[1]);
1810
1811         s->last_pts = s->xf[1]->pts;
1812         s->pts = s->xf[0]->pts;
1813         if (s->xf[0]->pts - (s->first_pts + s->offset_pts) > s->duration_pts)
1814             s->xfade_is_over = 1;
1815         ret = xfade_frame(ctx, s->xf[0], s->xf[1]);
1816         av_frame_free(&s->xf[0]);
1817         av_frame_free(&s->xf[1]);
1818         return ret;
1819     }
1820
1821     if (ff_inlink_queued_frames(ctx->inputs[0]) > 0 &&
1822         ff_inlink_queued_frames(ctx->inputs[1]) > 0) {
1823         ff_filter_set_ready(ctx, 100);
1824         return 0;
1825     }
1826
1827     if (ff_outlink_frame_wanted(outlink)) {
1828         if (!s->eof[0] && ff_outlink_get_status(ctx->inputs[0])) {
1829             s->eof[0] = 1;
1830             s->xfade_is_over = 1;
1831         }
1832         if (!s->eof[1] && ff_outlink_get_status(ctx->inputs[1])) {
1833             s->eof[1] = 1;
1834         }
1835         if (!s->eof[0] && !s->xf[0])
1836             ff_inlink_request_frame(ctx->inputs[0]);
1837         if (!s->eof[1] && (s->need_second || s->eof[0]))
1838             ff_inlink_request_frame(ctx->inputs[1]);
1839         if (s->eof[0] && s->eof[1] && (
1840             ff_inlink_queued_frames(ctx->inputs[0]) <= 0 ||
1841             ff_inlink_queued_frames(ctx->inputs[1]) <= 0))
1842             ff_outlink_set_status(outlink, AVERROR_EOF, AV_NOPTS_VALUE);
1843         return 0;
1844     }
1845
1846     return FFERROR_NOT_READY;
1847 }
1848
1849 static const AVFilterPad xfade_inputs[] = {
1850     {
1851         .name          = "main",
1852         .type          = AVMEDIA_TYPE_VIDEO,
1853     },
1854     {
1855         .name          = "xfade",
1856         .type          = AVMEDIA_TYPE_VIDEO,
1857     },
1858     { NULL }
1859 };
1860
1861 static const AVFilterPad xfade_outputs[] = {
1862     {
1863         .name          = "default",
1864         .type          = AVMEDIA_TYPE_VIDEO,
1865         .config_props  = config_output,
1866     },
1867     { NULL }
1868 };
1869
1870 AVFilter ff_vf_xfade = {
1871     .name          = "xfade",
1872     .description   = NULL_IF_CONFIG_SMALL("Cross fade one video with another video."),
1873     .priv_size     = sizeof(XFadeContext),
1874     .priv_class    = &xfade_class,
1875     .query_formats = query_formats,
1876     .activate      = xfade_activate,
1877     .uninit        = uninit,
1878     .inputs        = xfade_inputs,
1879     .outputs       = xfade_outputs,
1880     .flags         = AVFILTER_FLAG_SLICE_THREADS,
1881 };