FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_blend.c
Date: 2024-04-12 08:31:17
Exec Total Coverage
Lines: 95 141 67.4%
Functions: 7 15 46.7%
Branches: 30 80 37.5%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2013 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 "config_components.h"
22
23 #include "libavutil/eval.h"
24 #include "libavutil/mem.h"
25 #include "libavutil/opt.h"
26 #include "libavutil/pixfmt.h"
27 #include "avfilter.h"
28 #include "framesync.h"
29 #include "internal.h"
30 #include "vf_blend_init.h"
31 #include "video.h"
32 #include "blend.h"
33
34 #define TOP 0
35 #define BOTTOM 1
36
37 typedef struct BlendContext {
38 const AVClass *class;
39 FFFrameSync fs;
40 int hsub, vsub; ///< chroma subsampling values
41 int nb_planes;
42 char *all_expr;
43 enum BlendMode all_mode;
44 double all_opacity;
45
46 int depth;
47 FilterParams params[4];
48 int tblend;
49 AVFrame *prev_frame; /* only used with tblend */
50 } BlendContext;
51
52 static const char *const var_names[] = { "X", "Y", "W", "H", "SW", "SH", "T", "N", "A", "B", "TOP", "BOTTOM", NULL };
53 enum { VAR_X, VAR_Y, VAR_W, VAR_H, VAR_SW, VAR_SH, VAR_T, VAR_N, VAR_A, VAR_B, VAR_TOP, VAR_BOTTOM, VAR_VARS_NB };
54
55 typedef struct ThreadData {
56 const AVFrame *top, *bottom;
57 AVFrame *dst;
58 AVFilterLink *inlink;
59 int plane;
60 int w, h;
61 FilterParams *param;
62 } ThreadData;
63
64 #define OFFSET(x) offsetof(BlendContext, x)
65 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
66
67 static const AVOption blend_options[] = {
68 { "c0_mode", "set component #0 blend mode", OFFSET(params[0].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, .unit = "mode" },
69 { "c1_mode", "set component #1 blend mode", OFFSET(params[1].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, .unit = "mode" },
70 { "c2_mode", "set component #2 blend mode", OFFSET(params[2].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, .unit = "mode" },
71 { "c3_mode", "set component #3 blend mode", OFFSET(params[3].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, .unit = "mode" },
72 { "all_mode", "set blend mode for all components", OFFSET(all_mode), AV_OPT_TYPE_INT, {.i64=-1},-1, BLEND_NB-1, FLAGS, .unit = "mode" },
73 { "addition", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_ADDITION}, 0, 0, FLAGS, .unit = "mode" },
74 { "addition128","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINMERGE}, 0, 0, FLAGS, .unit = "mode" },
75 { "grainmerge", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINMERGE}, 0, 0, FLAGS, .unit = "mode" },
76 { "and", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AND}, 0, 0, FLAGS, .unit = "mode" },
77 { "average", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AVERAGE}, 0, 0, FLAGS, .unit = "mode" },
78 { "burn", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_BURN}, 0, 0, FLAGS, .unit = "mode" },
79 { "darken", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DARKEN}, 0, 0, FLAGS, .unit = "mode" },
80 { "difference", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIFFERENCE}, 0, 0, FLAGS, .unit = "mode" },
81 { "difference128", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINEXTRACT}, 0, 0, FLAGS, .unit = "mode" },
82 { "grainextract", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINEXTRACT}, 0, 0, FLAGS, .unit = "mode" },
83 { "divide", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIVIDE}, 0, 0, FLAGS, .unit = "mode" },
84 { "dodge", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DODGE}, 0, 0, FLAGS, .unit = "mode" },
85 { "exclusion", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_EXCLUSION}, 0, 0, FLAGS, .unit = "mode" },
86 { "extremity", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_EXTREMITY}, 0, 0, FLAGS, .unit = "mode" },
87 { "freeze", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_FREEZE}, 0, 0, FLAGS, .unit = "mode" },
88 { "glow", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GLOW}, 0, 0, FLAGS, .unit = "mode" },
89 { "hardlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDLIGHT}, 0, 0, FLAGS, .unit = "mode" },
90 { "hardmix", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDMIX}, 0, 0, FLAGS, .unit = "mode" },
91 { "heat", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HEAT}, 0, 0, FLAGS, .unit = "mode" },
92 { "lighten", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LIGHTEN}, 0, 0, FLAGS, .unit = "mode" },
93 { "linearlight","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LINEARLIGHT},0, 0, FLAGS, .unit = "mode" },
94 { "multiply", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY}, 0, 0, FLAGS, .unit = "mode" },
95 { "multiply128","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY128},0, 0, FLAGS, .unit = "mode" },
96 { "negation", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NEGATION}, 0, 0, FLAGS, .unit = "mode" },
97 { "normal", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NORMAL}, 0, 0, FLAGS, .unit = "mode" },
98 { "or", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OR}, 0, 0, FLAGS, .unit = "mode" },
99 { "overlay", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OVERLAY}, 0, 0, FLAGS, .unit = "mode" },
100 { "phoenix", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PHOENIX}, 0, 0, FLAGS, .unit = "mode" },
101 { "pinlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PINLIGHT}, 0, 0, FLAGS, .unit = "mode" },
102 { "reflect", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_REFLECT}, 0, 0, FLAGS, .unit = "mode" },
103 { "screen", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SCREEN}, 0, 0, FLAGS, .unit = "mode" },
104 { "softlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SOFTLIGHT}, 0, 0, FLAGS, .unit = "mode" },
105 { "subtract", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SUBTRACT}, 0, 0, FLAGS, .unit = "mode" },
106 { "vividlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_VIVIDLIGHT}, 0, 0, FLAGS, .unit = "mode" },
107 { "xor", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_XOR}, 0, 0, FLAGS, .unit = "mode" },
108 { "softdifference","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SOFTDIFFERENCE}, 0, 0, FLAGS, .unit = "mode" },
109 { "geometric", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GEOMETRIC}, 0, 0, FLAGS, .unit = "mode" },
110 { "harmonic", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARMONIC}, 0, 0, FLAGS, .unit = "mode" },
111 { "bleach", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_BLEACH}, 0, 0, FLAGS, .unit = "mode" },
112 { "stain", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_STAIN}, 0, 0, FLAGS, .unit = "mode" },
113 { "interpolate","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_INTERPOLATE},0, 0, FLAGS, .unit = "mode" },
114 { "hardoverlay","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDOVERLAY},0, 0, FLAGS, .unit = "mode" },
115 { "c0_expr", "set color component #0 expression", OFFSET(params[0].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
116 { "c1_expr", "set color component #1 expression", OFFSET(params[1].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
117 { "c2_expr", "set color component #2 expression", OFFSET(params[2].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
118 { "c3_expr", "set color component #3 expression", OFFSET(params[3].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
119 { "all_expr", "set expression for all color components", OFFSET(all_expr), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
120 { "c0_opacity", "set color component #0 opacity", OFFSET(params[0].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
121 { "c1_opacity", "set color component #1 opacity", OFFSET(params[1].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
122 { "c2_opacity", "set color component #2 opacity", OFFSET(params[2].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
123 { "c3_opacity", "set color component #3 opacity", OFFSET(params[3].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
124 { "all_opacity", "set opacity for all color components", OFFSET(all_opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
125 { NULL }
126 };
127
128 FRAMESYNC_DEFINE_CLASS(blend, BlendContext, fs);
129
130 #define DEFINE_BLEND_EXPR(type, name, div) \
131 static void blend_expr_## name(const uint8_t *_top, ptrdiff_t top_linesize, \
132 const uint8_t *_bottom, ptrdiff_t bottom_linesize, \
133 uint8_t *_dst, ptrdiff_t dst_linesize, \
134 ptrdiff_t width, ptrdiff_t height, \
135 FilterParams *param, double *values, int starty) \
136 { \
137 const type *top = (const type*)_top; \
138 const type *bottom = (const type*)_bottom; \
139 type *dst = (type*)_dst; \
140 AVExpr *e = param->e; \
141 int y, x; \
142 dst_linesize /= div; \
143 top_linesize /= div; \
144 bottom_linesize /= div; \
145 \
146 for (y = 0; y < height; y++) { \
147 values[VAR_Y] = y + starty; \
148 for (x = 0; x < width; x++) { \
149 values[VAR_X] = x; \
150 values[VAR_TOP] = values[VAR_A] = top[x]; \
151 values[VAR_BOTTOM] = values[VAR_B] = bottom[x]; \
152 dst[x] = av_expr_eval(e, values, NULL); \
153 } \
154 dst += dst_linesize; \
155 top += top_linesize; \
156 bottom += bottom_linesize; \
157 } \
158 }
159
160 DEFINE_BLEND_EXPR(uint8_t, 8bit, 1)
161 DEFINE_BLEND_EXPR(uint16_t, 16bit, 2)
162 DEFINE_BLEND_EXPR(float, 32bit, 4)
163
164 1323 static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
165 {
166 1323 ThreadData *td = arg;
167 1323 int slice_start = (td->h * jobnr ) / nb_jobs;
168 1323 int slice_end = (td->h * (jobnr+1)) / nb_jobs;
169 1323 int height = slice_end - slice_start;
170 1323 const uint8_t *top = td->top->data[td->plane];
171 1323 const uint8_t *bottom = td->bottom->data[td->plane];
172 1323 uint8_t *dst = td->dst->data[td->plane];
173 double values[VAR_VARS_NB];
174
175 1323 values[VAR_N] = td->inlink->frame_count_out;
176
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1323 values[VAR_T] = td->dst->pts == AV_NOPTS_VALUE ? NAN : td->dst->pts * av_q2d(td->inlink->time_base);
177 1323 values[VAR_W] = td->w;
178 1323 values[VAR_H] = td->h;
179 1323 values[VAR_SW] = td->w / (double)td->dst->width;
180 1323 values[VAR_SH] = td->h / (double)td->dst->height;
181
182 1323 td->param->blend(top + slice_start * td->top->linesize[td->plane],
183 1323 td->top->linesize[td->plane],
184 1323 bottom + slice_start * td->bottom->linesize[td->plane],
185 1323 td->bottom->linesize[td->plane],
186 1323 dst + slice_start * td->dst->linesize[td->plane],
187 1323 td->dst->linesize[td->plane],
188 1323 td->w, height, td->param, &values[0], slice_start);
189 1323 return 0;
190 }
191
192 49 static AVFrame *blend_frame(AVFilterContext *ctx, AVFrame *top_buf,
193 const AVFrame *bottom_buf)
194 {
195 49 BlendContext *s = ctx->priv;
196 49 AVFilterLink *inlink = ctx->inputs[0];
197 49 AVFilterLink *outlink = ctx->outputs[0];
198 AVFrame *dst_buf;
199 int plane;
200
201 49 dst_buf = ff_get_video_buffer(outlink, outlink->w, outlink->h);
202
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49 if (!dst_buf)
203 return top_buf;
204
205
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49 if (av_frame_copy_props(dst_buf, top_buf) < 0) {
206 av_frame_free(&dst_buf);
207 return top_buf;
208 }
209
210
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196 for (plane = 0; plane < s->nb_planes; plane++) {
211
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147 int hsub = plane == 1 || plane == 2 ? s->hsub : 0;
212
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147 int vsub = plane == 1 || plane == 2 ? s->vsub : 0;
213 147 int outw = AV_CEIL_RSHIFT(dst_buf->width, hsub);
214 147 int outh = AV_CEIL_RSHIFT(dst_buf->height, vsub);
215 147 FilterParams *param = &s->params[plane];
216 147 ThreadData td = { .top = top_buf, .bottom = bottom_buf, .dst = dst_buf,
217 .w = outw, .h = outh, .param = param, .plane = plane,
218 .inlink = inlink };
219
220 147 ff_filter_execute(ctx, filter_slice, &td, NULL,
221
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147 FFMIN(outh, ff_filter_get_nb_threads(ctx)));
222 }
223
224
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49 if (!s->tblend)
225 av_frame_free(&top_buf);
226
227 49 return dst_buf;
228 }
229
230 static int blend_frame_for_dualinput(FFFrameSync *fs)
231 {
232 AVFilterContext *ctx = fs->parent;
233 AVFrame *top_buf, *bottom_buf, *dst_buf;
234 int ret;
235
236 ret = ff_framesync_dualinput_get(fs, &top_buf, &bottom_buf);
237 if (ret < 0)
238 return ret;
239 if (!bottom_buf)
240 return ff_filter_frame(ctx->outputs[0], top_buf);
241 dst_buf = blend_frame(ctx, top_buf, bottom_buf);
242 return ff_filter_frame(ctx->outputs[0], dst_buf);
243 }
244
245 2 static av_cold int init(AVFilterContext *ctx)
246 {
247 2 BlendContext *s = ctx->priv;
248
249 2 s->tblend = !strcmp(ctx->filter->name, "tblend");
250
251 2 s->fs.on_event = blend_frame_for_dualinput;
252 2 return 0;
253 }
254
255 static const enum AVPixelFormat pix_fmts[] = {
256 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
257 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P,AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
258 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
259 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8,
260 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
261 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GRAY9,
262 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV440P10,
263 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
264 AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GRAY10,
265 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
266 AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
267 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GRAY12,
268 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14, AV_PIX_FMT_GBRP14,
269 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
270 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
271 AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16, AV_PIX_FMT_GRAY16,
272 AV_PIX_FMT_GBRPF32, AV_PIX_FMT_GBRAPF32, AV_PIX_FMT_GRAYF32,
273 AV_PIX_FMT_NONE
274 };
275
276 2 static av_cold void uninit(AVFilterContext *ctx)
277 {
278 2 BlendContext *s = ctx->priv;
279 int i;
280
281 2 ff_framesync_uninit(&s->fs);
282 2 av_frame_free(&s->prev_frame);
283
284
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10 for (i = 0; i < FF_ARRAY_ELEMS(s->params); i++)
285 8 av_expr_free(s->params[i].e);
286 2 }
287
288 1 static int config_params(AVFilterContext *ctx)
289 {
290 1 BlendContext *s = ctx->priv;
291 int ret;
292
293
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5 for (int plane = 0; plane < FF_ARRAY_ELEMS(s->params); plane++) {
294 4 FilterParams *param = &s->params[plane];
295
296
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4 if (s->all_mode >= 0)
297 4 param->mode = s->all_mode;
298
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4 if (s->all_opacity < 1)
299 param->opacity = s->all_opacity;
300
301 4 ff_blend_init(param, s->depth);
302
303
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4 if (s->all_expr && !param->expr_str) {
304 param->expr_str = av_strdup(s->all_expr);
305 if (!param->expr_str)
306 return AVERROR(ENOMEM);
307 }
308
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4 if (param->expr_str) {
309 ret = av_expr_parse(&param->e, param->expr_str, var_names,
310 NULL, NULL, NULL, NULL, 0, ctx);
311 if (ret < 0)
312 return ret;
313 param->blend = s->depth > 8 ? s->depth > 16 ? blend_expr_32bit : blend_expr_16bit : blend_expr_8bit;
314 }
315 }
316
317 1 return 0;
318 }
319
320 1 static int config_output(AVFilterLink *outlink)
321 {
322 1 AVFilterContext *ctx = outlink->src;
323 1 AVFilterLink *toplink = ctx->inputs[TOP];
324 1 BlendContext *s = ctx->priv;
325 1 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(toplink->format);
326 int ret;
327
328
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1 if (!s->tblend) {
329 AVFilterLink *bottomlink = ctx->inputs[BOTTOM];
330
331 if (toplink->w != bottomlink->w || toplink->h != bottomlink->h) {
332 av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
333 "(size %dx%d) do not match the corresponding "
334 "second input link %s parameters (size %dx%d)\n",
335 ctx->input_pads[TOP].name, toplink->w, toplink->h,
336 ctx->input_pads[BOTTOM].name, bottomlink->w, bottomlink->h);
337 return AVERROR(EINVAL);
338 }
339 }
340
341 1 outlink->w = toplink->w;
342 1 outlink->h = toplink->h;
343 1 outlink->time_base = toplink->time_base;
344 1 outlink->sample_aspect_ratio = toplink->sample_aspect_ratio;
345 1 outlink->frame_rate = toplink->frame_rate;
346
347 1 s->hsub = pix_desc->log2_chroma_w;
348 1 s->vsub = pix_desc->log2_chroma_h;
349
350 1 s->depth = pix_desc->comp[0].depth;
351 1 s->nb_planes = av_pix_fmt_count_planes(toplink->format);
352
353
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1 if (!s->tblend)
354 if ((ret = ff_framesync_init_dualinput(&s->fs, ctx)) < 0)
355 return ret;
356
357 1 ret = config_params(ctx);
358
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1 if (ret < 0)
359 return ret;
360
361
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1 if (s->tblend)
362 1 return 0;
363
364 ret = ff_framesync_configure(&s->fs);
365 outlink->time_base = s->fs.time_base;
366
367 return ret;
368 }
369
370 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
371 char *res, int res_len, int flags)
372 {
373 int ret;
374
375 ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
376 if (ret < 0)
377 return ret;
378
379 return config_params(ctx);
380 }
381
382 static const AVFilterPad blend_outputs[] = {
383 {
384 .name = "default",
385 .type = AVMEDIA_TYPE_VIDEO,
386 .config_props = config_output,
387 },
388 };
389
390 #if CONFIG_BLEND_FILTER
391
392 static int activate(AVFilterContext *ctx)
393 {
394 BlendContext *s = ctx->priv;
395 return ff_framesync_activate(&s->fs);
396 }
397
398 static const AVFilterPad blend_inputs[] = {
399 {
400 .name = "top",
401 .type = AVMEDIA_TYPE_VIDEO,
402 },{
403 .name = "bottom",
404 .type = AVMEDIA_TYPE_VIDEO,
405 },
406 };
407
408 const AVFilter ff_vf_blend = {
409 .name = "blend",
410 .description = NULL_IF_CONFIG_SMALL("Blend two video frames into each other."),
411 .preinit = blend_framesync_preinit,
412 .init = init,
413 .uninit = uninit,
414 .priv_size = sizeof(BlendContext),
415 .activate = activate,
416 FILTER_INPUTS(blend_inputs),
417 FILTER_OUTPUTS(blend_outputs),
418 FILTER_PIXFMTS_ARRAY(pix_fmts),
419 .priv_class = &blend_class,
420 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
421 .process_command = process_command,
422 };
423
424 #endif
425
426 #if CONFIG_TBLEND_FILTER
427
428 50 static int tblend_filter_frame(AVFilterLink *inlink, AVFrame *frame)
429 {
430 50 AVFilterContext *ctx = inlink->dst;
431 50 BlendContext *s = ctx->priv;
432 50 AVFilterLink *outlink = ctx->outputs[0];
433
434
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50 if (s->prev_frame) {
435 AVFrame *out;
436
437
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49 if (ctx->is_disabled)
438 out = av_frame_clone(frame);
439 else
440 49 out = blend_frame(ctx, frame, s->prev_frame);
441 49 av_frame_free(&s->prev_frame);
442 49 s->prev_frame = frame;
443 49 return ff_filter_frame(outlink, out);
444 }
445 1 s->prev_frame = frame;
446 1 return 0;
447 }
448
449 AVFILTER_DEFINE_CLASS_EXT(tblend, "tblend", blend_options);
450
451 static const AVFilterPad tblend_inputs[] = {
452 {
453 .name = "default",
454 .type = AVMEDIA_TYPE_VIDEO,
455 .filter_frame = tblend_filter_frame,
456 },
457 };
458
459 const AVFilter ff_vf_tblend = {
460 .name = "tblend",
461 .description = NULL_IF_CONFIG_SMALL("Blend successive frames."),
462 .priv_size = sizeof(BlendContext),
463 .priv_class = &tblend_class,
464 .init = init,
465 .uninit = uninit,
466 FILTER_INPUTS(tblend_inputs),
467 FILTER_OUTPUTS(blend_outputs),
468 FILTER_PIXFMTS_ARRAY(pix_fmts),
469 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
470 .process_command = process_command,
471 };
472
473 #endif
474