GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/vf_fade.c Lines: 95 211 45.0 %
Date: 2020-08-14 10:39:37 Branches: 58 160 36.2 %

Line Branch Exec Source
1
/*
2
 * Copyright (c) 2010 Brandon Mintern
3
 * Copyright (c) 2007 Bobby Bingham
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
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 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21
22
/**
23
 * @file
24
 * video fade filter
25
 * based heavily on vf_negate.c by Bobby Bingham
26
 */
27
28
#include "libavutil/avassert.h"
29
#include "libavutil/avstring.h"
30
#include "libavutil/common.h"
31
#include "libavutil/eval.h"
32
#include "libavutil/opt.h"
33
#include "libavutil/pixdesc.h"
34
#include "avfilter.h"
35
#include "drawutils.h"
36
#include "formats.h"
37
#include "internal.h"
38
#include "video.h"
39
40
#define R 0
41
#define G 1
42
#define B 2
43
#define A 3
44
45
#define Y 0
46
#define U 1
47
#define V 2
48
49
#define FADE_IN  0
50
#define FADE_OUT 1
51
52
typedef struct FadeContext {
53
    const AVClass *class;
54
    int type;
55
    int factor, fade_per_frame;
56
    int start_frame, nb_frames;
57
    int hsub, vsub, bpp, depth;
58
    unsigned int black_level, black_level_scaled;
59
    uint8_t is_rgb;
60
    uint8_t is_packed_rgb;
61
    uint8_t rgba_map[4];
62
    int alpha;
63
    int is_planar;
64
    uint64_t start_time, duration;
65
    enum {VF_FADE_WAITING=0, VF_FADE_FADING, VF_FADE_DONE} fade_state;
66
    uint8_t color_rgba[4];  ///< fade color
67
    int black_fade;         ///< if color_rgba is black
68
    int (*filter_slice_luma)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
69
    int (*filter_slice_chroma)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
70
    int (*filter_slice_alpha)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
71
} FadeContext;
72
73
2
static av_cold int init(AVFilterContext *ctx)
74
{
75
2
    FadeContext *s = ctx->priv;
76
77
2
    s->fade_per_frame = (1 << 16) / s->nb_frames;
78
2
    s->fade_state = VF_FADE_WAITING;
79
80
2
    if (s->duration != 0) {
81
        // If duration (seconds) is non-zero, assume that we are not fading based on frames
82
        s->nb_frames = 0; // Mostly to clean up logging
83
    }
84
85
    // Choose what to log. If both time-based and frame-based options, both lines will be in the log
86

2
    if (s->start_frame || s->nb_frames) {
87
2
        av_log(ctx, AV_LOG_VERBOSE,
88
               "type:%s start_frame:%d nb_frames:%d alpha:%d\n",
89
2
               s->type == FADE_IN ? "in" : "out", s->start_frame,
90
               s->nb_frames,s->alpha);
91
    }
92

2
    if (s->start_time || s->duration) {
93
        av_log(ctx, AV_LOG_VERBOSE,
94
               "type:%s start_time:%f duration:%f alpha:%d\n",
95
               s->type == FADE_IN ? "in" : "out", (s->start_time / (double)AV_TIME_BASE),
96
               (s->duration / (double)AV_TIME_BASE),s->alpha);
97
    }
98
99
2
    s->black_fade = !memcmp(s->color_rgba, "\x00\x00\x00\xff", 4);
100
2
    return 0;
101
}
102
103
2
static int query_formats(AVFilterContext *ctx)
104
{
105
2
    const FadeContext *s = ctx->priv;
106
    static const enum AVPixelFormat pix_fmts[] = {
107
        AV_PIX_FMT_YUV444P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV420P,
108
        AV_PIX_FMT_YUV411P,  AV_PIX_FMT_YUV410P,
109
        AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
110
        AV_PIX_FMT_YUV440P,  AV_PIX_FMT_YUVJ440P,
111
        AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
112
        AV_PIX_FMT_RGB24,    AV_PIX_FMT_BGR24,
113
        AV_PIX_FMT_ARGB,     AV_PIX_FMT_ABGR,
114
        AV_PIX_FMT_RGBA,     AV_PIX_FMT_BGRA,
115
        AV_PIX_FMT_GBRP,     AV_PIX_FMT_GBRAP,
116
        AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
117
        AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
118
        AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
119
        AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
120
        AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
121
        AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
122
        AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
123
        AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
124
        AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
125
        AV_PIX_FMT_NONE
126
    };
127
    static const enum AVPixelFormat pix_fmts_rgb[] = {
128
        AV_PIX_FMT_RGB24,    AV_PIX_FMT_BGR24,
129
        AV_PIX_FMT_ARGB,     AV_PIX_FMT_ABGR,
130
        AV_PIX_FMT_RGBA,     AV_PIX_FMT_BGRA,
131
        AV_PIX_FMT_GBRP,
132
        AV_PIX_FMT_NONE
133
    };
134
    static const enum AVPixelFormat pix_fmts_alpha[] = {
135
        AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
136
        AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
137
        AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
138
        AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
139
        AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
140
        AV_PIX_FMT_ARGB,     AV_PIX_FMT_ABGR,
141
        AV_PIX_FMT_RGBA,     AV_PIX_FMT_BGRA,
142
        AV_PIX_FMT_GBRAP,
143
        AV_PIX_FMT_NONE
144
    };
145
    static const enum AVPixelFormat pix_fmts_rgba[] = {
146
        AV_PIX_FMT_ARGB,     AV_PIX_FMT_ABGR,
147
        AV_PIX_FMT_RGBA,     AV_PIX_FMT_BGRA,
148
        AV_PIX_FMT_GBRAP,
149
        AV_PIX_FMT_NONE
150
    };
151
    AVFilterFormats *fmts_list;
152
153
2
    if (s->alpha) {
154
        if (s->black_fade)
155
            fmts_list = ff_make_format_list(pix_fmts_alpha);
156
        else
157
            fmts_list = ff_make_format_list(pix_fmts_rgba);
158
    } else {
159
2
        if (s->black_fade)
160
2
            fmts_list = ff_make_format_list(pix_fmts);
161
        else
162
            fmts_list = ff_make_format_list(pix_fmts_rgb);
163
    }
164
2
    if (!fmts_list)
165
        return AVERROR(ENOMEM);
166
2
    return ff_set_common_formats(ctx, fmts_list);
167
}
168
169
const static enum AVPixelFormat studio_level_pix_fmts[] = {
170
    AV_PIX_FMT_YUV444P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV420P,
171
    AV_PIX_FMT_YUV411P,  AV_PIX_FMT_YUV410P,
172
    AV_PIX_FMT_YUV440P,
173
    AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
174
    AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
175
    AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
176
    AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
177
    AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
178
    AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
179
    AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
180
    AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
181
    AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
182
    AV_PIX_FMT_NONE
183
};
184
185
static av_always_inline void filter_rgb(FadeContext *s, const AVFrame *frame,
186
                                        int slice_start, int slice_end,
187
                                        int do_alpha, int step)
188
{
189
    int i, j;
190
    const uint8_t r_idx  = s->rgba_map[R];
191
    const uint8_t g_idx  = s->rgba_map[G];
192
    const uint8_t b_idx  = s->rgba_map[B];
193
    const uint8_t a_idx  = s->rgba_map[A];
194
    const uint8_t *c = s->color_rgba;
195
196
    for (i = slice_start; i < slice_end; i++) {
197
        uint8_t *p = frame->data[0] + i * frame->linesize[0];
198
        for (j = 0; j < frame->width; j++) {
199
#define INTERP(c_name, c_idx) av_clip_uint8(((c[c_idx]<<16) + ((int)p[c_name] - (int)c[c_idx]) * s->factor + (1<<15)) >> 16)
200
            p[r_idx] = INTERP(r_idx, 0);
201
            p[g_idx] = INTERP(g_idx, 1);
202
            p[b_idx] = INTERP(b_idx, 2);
203
            if (do_alpha)
204
                p[a_idx] = INTERP(a_idx, 3);
205
            p += step;
206
        }
207
    }
208
}
209
210
static av_always_inline void filter_rgb_planar(FadeContext *s, const AVFrame *frame,
211
                                               int slice_start, int slice_end,
212
                                               int do_alpha)
213
{
214
    int i, j;
215
    const uint8_t *c = s->color_rgba;
216
217
    for (i = slice_start; i < slice_end; i++) {
218
        uint8_t *pg = frame->data[0] + i * frame->linesize[0];
219
        uint8_t *pb = frame->data[1] + i * frame->linesize[1];
220
        uint8_t *pr = frame->data[2] + i * frame->linesize[2];
221
        uint8_t *pa = frame->data[3] + i * frame->linesize[3];
222
        for (j = 0; j < frame->width; j++) {
223
#define INTERPP(c_name, c_idx) av_clip_uint8(((c[c_idx]<<16) + ((int)c_name - (int)c[c_idx]) * s->factor + (1<<15)) >> 16)
224
            pr[j] = INTERPP(pr[j], 0);
225
            pg[j] = INTERPP(pg[j], 1);
226
            pb[j] = INTERPP(pb[j], 2);
227
            if (do_alpha)
228
                pa[j] = INTERPP(pa[j], 3);
229
        }
230
    }
231
}
232
233
static int filter_slice_rgb(AVFilterContext *ctx, void *arg, int jobnr,
234
                            int nb_jobs)
235
{
236
    FadeContext *s = ctx->priv;
237
    AVFrame *frame = arg;
238
    int slice_start = (frame->height *  jobnr   ) / nb_jobs;
239
    int slice_end   = (frame->height * (jobnr+1)) / nb_jobs;
240
241
    if      (s->is_planar && s->alpha)
242
                          filter_rgb_planar(s, frame, slice_start, slice_end, 1);
243
    else if (s->is_planar)
244
                          filter_rgb_planar(s, frame, slice_start, slice_end, 0);
245
    else if (s->alpha)    filter_rgb(s, frame, slice_start, slice_end, 1, 4);
246
    else if (s->bpp == 3) filter_rgb(s, frame, slice_start, slice_end, 0, 3);
247
    else if (s->bpp == 4) filter_rgb(s, frame, slice_start, slice_end, 0, 4);
248
    else                  av_assert0(0);
249
250
    return 0;
251
}
252
253
351
static int filter_slice_luma(AVFilterContext *ctx, void *arg, int jobnr,
254
                             int nb_jobs)
255
{
256
351
    FadeContext *s = ctx->priv;
257
351
    AVFrame *frame = arg;
258
351
    int slice_start = (frame->height *  jobnr   ) / nb_jobs;
259
351
    int slice_end   = (frame->height * (jobnr+1)) / nb_jobs;
260
    int i, j;
261
262

702
    for (int k = 0; k < 1 + 2 * (s->is_planar && s->is_rgb); k++) {
263
11583
        for (i = slice_start; i < slice_end; i++) {
264
11232
            uint8_t *p = frame->data[k] + i * frame->linesize[k];
265
3964896
            for (j = 0; j < frame->width * s->bpp; j++) {
266
                /* s->factor is using 16 lower-order bits for decimal
267
                 * places. 32768 = 1 << 15, it is an integer representation
268
                 * of 0.5 and is for rounding. */
269
3953664
                *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
270
3953664
                p++;
271
            }
272
        }
273
    }
274
275
351
    return 0;
276
}
277
278
static int filter_slice_luma16(AVFilterContext *ctx, void *arg, int jobnr,
279
                               int nb_jobs)
280
{
281
    FadeContext *s = ctx->priv;
282
    AVFrame *frame = arg;
283
    int slice_start = (frame->height *  jobnr   ) / nb_jobs;
284
    int slice_end   = (frame->height * (jobnr+1)) / nb_jobs;
285
    int i, j;
286
287
    for (int k = 0; k < 1 + 2 * (s->is_planar && s->is_rgb); k++) {
288
        for (i = slice_start; i < slice_end; i++) {
289
            uint16_t *p = (uint16_t *)(frame->data[k] + i * frame->linesize[k]);
290
            for (j = 0; j < frame->width * s->bpp; j++) {
291
                /* s->factor is using 16 lower-order bits for decimal
292
                 * places. 32768 = 1 << 15, it is an integer representation
293
                 * of 0.5 and is for rounding. */
294
                *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
295
                p++;
296
            }
297
        }
298
    }
299
300
    return 0;
301
}
302
303
351
static int filter_slice_chroma(AVFilterContext *ctx, void *arg, int jobnr,
304
                               int nb_jobs)
305
{
306
351
    FadeContext *s = ctx->priv;
307
351
    AVFrame *frame = arg;
308
    int i, j, plane;
309
351
    const int width = AV_CEIL_RSHIFT(frame->width, s->hsub);
310
351
    const int height= AV_CEIL_RSHIFT(frame->height, s->vsub);
311
351
    int slice_start = (height *  jobnr   ) / nb_jobs;
312
351
    int slice_end   = FFMIN(((height * (jobnr+1)) / nb_jobs), frame->height);
313
314
1053
    for (plane = 1; plane < 3; plane++) {
315
11934
        for (i = slice_start; i < slice_end; i++) {
316
11232
            uint8_t *p = frame->data[plane] + i * frame->linesize[plane];
317
1988064
            for (j = 0; j < width; j++) {
318
                /* 8421367 = ((128 << 1) + 1) << 15. It is an integer
319
                 * representation of 128.5. The .5 is for rounding
320
                 * purposes. */
321
1976832
                *p = ((*p - 128) * s->factor + 8421367) >> 16;
322
1976832
                p++;
323
            }
324
        }
325
    }
326
327
351
    return 0;
328
}
329
330
static int filter_slice_chroma16(AVFilterContext *ctx, void *arg, int jobnr,
331
                                 int nb_jobs)
332
{
333
    FadeContext *s = ctx->priv;
334
    AVFrame *frame = arg;
335
    int i, j, plane;
336
    const int width = AV_CEIL_RSHIFT(frame->width, s->hsub);
337
    const int height= AV_CEIL_RSHIFT(frame->height, s->vsub);
338
    const int mid = 1 << (s->depth - 1);
339
    const int add = ((mid << 1) + 1) << 15;
340
    int slice_start = (height *  jobnr   ) / nb_jobs;
341
    int slice_end   = FFMIN(((height * (jobnr+1)) / nb_jobs), frame->height);
342
343
    for (plane = 1; plane < 3; plane++) {
344
        for (i = slice_start; i < slice_end; i++) {
345
            uint16_t *p = (uint16_t *)(frame->data[plane] + i * frame->linesize[plane]);
346
            for (j = 0; j < width; j++) {
347
                *p = ((*p - mid) * s->factor + add) >> 16;
348
                p++;
349
            }
350
        }
351
    }
352
353
    return 0;
354
}
355
356
static int filter_slice_alpha(AVFilterContext *ctx, void *arg, int jobnr,
357
                              int nb_jobs)
358
{
359
    FadeContext *s = ctx->priv;
360
    AVFrame *frame = arg;
361
    int plane = s->is_packed_rgb ? 0 : A;
362
    int slice_start = (frame->height *  jobnr   ) / nb_jobs;
363
    int slice_end   = (frame->height * (jobnr+1)) / nb_jobs;
364
    int i, j;
365
366
    for (i = slice_start; i < slice_end; i++) {
367
        uint8_t *p = frame->data[plane] + i * frame->linesize[plane] + s->is_packed_rgb*s->rgba_map[A];
368
        int step = s->is_packed_rgb ? 4 : 1;
369
        for (j = 0; j < frame->width; j++) {
370
            /* s->factor is using 16 lower-order bits for decimal
371
             * places. 32768 = 1 << 15, it is an integer representation
372
             * of 0.5 and is for rounding. */
373
            *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
374
            p += step;
375
        }
376
    }
377
378
    return 0;
379
}
380
381
static int filter_slice_alpha16(AVFilterContext *ctx, void *arg, int jobnr,
382
                                int nb_jobs)
383
{
384
    FadeContext *s = ctx->priv;
385
    AVFrame *frame = arg;
386
    int plane = s->is_packed_rgb ? 0 : A;
387
    int slice_start = (frame->height *  jobnr   ) / nb_jobs;
388
    int slice_end   = (frame->height * (jobnr+1)) / nb_jobs;
389
    int i, j;
390
391
    for (i = slice_start; i < slice_end; i++) {
392
        uint16_t *p = (uint16_t *)(frame->data[plane] + i * frame->linesize[plane]) + s->is_packed_rgb*s->rgba_map[A];
393
        int step = s->is_packed_rgb ? 4 : 1;
394
        for (j = 0; j < frame->width; j++) {
395
            /* s->factor is using 16 lower-order bits for decimal
396
             * places. 32768 = 1 << 15, it is an integer representation
397
             * of 0.5 and is for rounding. */
398
            *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
399
            p += step;
400
        }
401
    }
402
403
    return 0;
404
}
405
406
2
static int config_props(AVFilterLink *inlink)
407
{
408
2
    FadeContext *s = inlink->dst->priv;
409
2
    const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(inlink->format);
410
411
2
    s->hsub = pixdesc->log2_chroma_w;
412
2
    s->vsub = pixdesc->log2_chroma_h;
413
414
2
    ff_fill_rgba_map(s->rgba_map, inlink->format);
415
416
2
    s->depth = pixdesc->comp[0].depth;
417
4
    s->bpp = pixdesc->flags & AV_PIX_FMT_FLAG_PLANAR ?
418
2
             1 :
419
             av_get_bits_per_pixel(pixdesc) >> 3;
420
2
    s->alpha &= !!(pixdesc->flags & AV_PIX_FMT_FLAG_ALPHA);
421
2
    s->is_planar = pixdesc->flags & AV_PIX_FMT_FLAG_PLANAR;
422
2
    s->is_rgb = pixdesc->flags & AV_PIX_FMT_FLAG_RGB;
423

2
    s->is_packed_rgb = !s->is_planar && s->is_rgb;
424
425
    /* use CCIR601/709 black level for studio-level pixel non-alpha components */
426
2
    s->black_level =
427

2
            ff_fmt_is_in(inlink->format, studio_level_pix_fmts) && !s->alpha ? 16 * (1 << (s->depth - 8)): 0;
428
    /* 32768 = 1 << 15, it is an integer representation
429
     * of 0.5 and is for rounding. */
430
2
    s->black_level_scaled = (s->black_level << 16) + 32768;
431
432
2
    s->filter_slice_luma   = s->depth <= 8 ? filter_slice_luma   : filter_slice_luma16;
433
2
    s->filter_slice_chroma = s->depth <= 8 ? filter_slice_chroma : filter_slice_chroma16;
434
2
    s->filter_slice_alpha  = s->depth <= 8 ? filter_slice_alpha  : filter_slice_alpha16;
435
436
2
    return 0;
437
}
438
439
100
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
440
{
441
100
    AVFilterContext *ctx = inlink->dst;
442
100
    FadeContext *s       = ctx->priv;
443
100
    double frame_timestamp = frame->pts == AV_NOPTS_VALUE ? -1 : frame->pts * av_q2d(inlink->time_base);
444
445
    // Calculate Fade assuming this is a Fade In
446
100
    if (s->fade_state == VF_FADE_WAITING) {
447
37
        s->factor=0;
448
37
        if (frame_timestamp >= s->start_time/(double)AV_TIME_BASE
449
37
            && inlink->frame_count_out >= s->start_frame) {
450
            // Time to start fading
451
2
            s->fade_state = VF_FADE_FADING;
452
453
            // Save start time in case we are starting based on frames and fading based on time
454

2
            if (s->start_time == 0 && s->start_frame != 0) {
455
2
                s->start_time = frame_timestamp*(double)AV_TIME_BASE;
456
            }
457
458
            // Save start frame in case we are starting based on time and fading based on frames
459

2
            if (s->start_time != 0 && s->start_frame == 0) {
460
                s->start_frame = inlink->frame_count_out;
461
            }
462
        }
463
    }
464
100
    if (s->fade_state == VF_FADE_FADING) {
465
34
        if (s->duration == 0) {
466
            // Fading based on frame count
467
34
            s->factor = (inlink->frame_count_out - s->start_frame) * s->fade_per_frame;
468
34
            if (inlink->frame_count_out > s->start_frame + s->nb_frames) {
469
2
                s->fade_state = VF_FADE_DONE;
470
            }
471
472
        } else {
473
            // Fading based on duration
474
            s->factor = (frame_timestamp - s->start_time/(double)AV_TIME_BASE)
475
                            * (float) UINT16_MAX / (s->duration/(double)AV_TIME_BASE);
476
            if (frame_timestamp > s->start_time/(double)AV_TIME_BASE
477
                                  + s->duration/(double)AV_TIME_BASE) {
478
                s->fade_state = VF_FADE_DONE;
479
            }
480
        }
481
    }
482
100
    if (s->fade_state == VF_FADE_DONE) {
483
33
        s->factor=UINT16_MAX;
484
    }
485
486
100
    s->factor = av_clip_uint16(s->factor);
487
488
    // Invert fade_factor if Fading Out
489
100
    if (s->type == FADE_OUT) {
490
50
        s->factor=UINT16_MAX-s->factor;
491
    }
492
493
100
    if (s->factor < UINT16_MAX) {
494
39
        if (s->alpha) {
495
            ctx->internal->execute(ctx, s->filter_slice_alpha, frame, NULL,
496
                                FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
497

39
        } else if (s->is_rgb && !s->black_fade) {
498
            ctx->internal->execute(ctx, filter_slice_rgb, frame, NULL,
499
                                   FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
500
        } else {
501
            /* luma, or rgb plane in case of black */
502
78
            ctx->internal->execute(ctx, s->filter_slice_luma, frame, NULL,
503
78
                                FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
504
505

39
            if (frame->data[1] && frame->data[2] && !s->is_rgb) {
506
                /* chroma planes */
507
78
                ctx->internal->execute(ctx, s->filter_slice_chroma, frame, NULL,
508
78
                                    FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
509
            }
510
        }
511
    }
512
513
100
    return ff_filter_frame(inlink->dst->outputs[0], frame);
514
}
515
516
517
#define OFFSET(x) offsetof(FadeContext, x)
518
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
519
520
static const AVOption fade_options[] = {
521
    { "type", "set the fade direction", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
522
    { "t",    "set the fade direction", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
523
        { "in",  "fade-in",  0, AV_OPT_TYPE_CONST, { .i64 = FADE_IN },  .flags = FLAGS, .unit = "type" },
524
        { "out", "fade-out", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_OUT }, .flags = FLAGS, .unit = "type" },
525
    { "start_frame", "Number of the first frame to which to apply the effect.",
526
                                                    OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
527
    { "s",           "Number of the first frame to which to apply the effect.",
528
                                                    OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
529
    { "nb_frames",   "Number of frames to which the effect should be applied.",
530
                                                    OFFSET(nb_frames),   AV_OPT_TYPE_INT, { .i64 = 25 }, 1, INT_MAX, FLAGS },
531
    { "n",           "Number of frames to which the effect should be applied.",
532
                                                    OFFSET(nb_frames),   AV_OPT_TYPE_INT, { .i64 = 25 }, 1, INT_MAX, FLAGS },
533
    { "alpha",       "fade alpha if it is available on the input", OFFSET(alpha),       AV_OPT_TYPE_BOOL, {.i64 = 0    }, 0,       1, FLAGS },
534
    { "start_time",  "Number of seconds of the beginning of the effect.",
535
                                                    OFFSET(start_time),  AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
536
    { "st",          "Number of seconds of the beginning of the effect.",
537
                                                    OFFSET(start_time),  AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
538
    { "duration",    "Duration of the effect in seconds.",
539
                                                    OFFSET(duration),    AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
540
    { "d",           "Duration of the effect in seconds.",
541
                                                    OFFSET(duration),    AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
542
    { "color",       "set color",                   OFFSET(color_rgba),  AV_OPT_TYPE_COLOR,    {.str = "black"}, 0, 0, FLAGS },
543
    { "c",           "set color",                   OFFSET(color_rgba),  AV_OPT_TYPE_COLOR,    {.str = "black"}, 0, 0, FLAGS },
544
    { NULL }
545
};
546
547
AVFILTER_DEFINE_CLASS(fade);
548
549
static const AVFilterPad avfilter_vf_fade_inputs[] = {
550
    {
551
        .name           = "default",
552
        .type           = AVMEDIA_TYPE_VIDEO,
553
        .config_props   = config_props,
554
        .filter_frame   = filter_frame,
555
        .needs_writable = 1,
556
    },
557
    { NULL }
558
};
559
560
static const AVFilterPad avfilter_vf_fade_outputs[] = {
561
    {
562
        .name = "default",
563
        .type = AVMEDIA_TYPE_VIDEO,
564
    },
565
    { NULL }
566
};
567
568
AVFilter ff_vf_fade = {
569
    .name          = "fade",
570
    .description   = NULL_IF_CONFIG_SMALL("Fade in/out input video."),
571
    .init          = init,
572
    .priv_size     = sizeof(FadeContext),
573
    .priv_class    = &fade_class,
574
    .query_formats = query_formats,
575
    .inputs        = avfilter_vf_fade_inputs,
576
    .outputs       = avfilter_vf_fade_outputs,
577
    .flags         = AVFILTER_FLAG_SLICE_THREADS,
578
};