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path: root/libavfilter/vf_blend.c (plain)
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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 "libavutil/imgutils.h"
22#include "libavutil/eval.h"
23#include "libavutil/opt.h"
24#include "libavutil/pixfmt.h"
25#include "avfilter.h"
26#include "bufferqueue.h"
27#include "formats.h"
28#include "internal.h"
29#include "dualinput.h"
30#include "video.h"
31#include "blend.h"
32
33#define TOP 0
34#define BOTTOM 1
35
36typedef struct BlendContext {
37 const AVClass *class;
38 FFDualInputContext dinput;
39 int hsub, vsub; ///< chroma subsampling values
40 int nb_planes;
41 char *all_expr;
42 enum BlendMode all_mode;
43 double all_opacity;
44
45 FilterParams params[4];
46 int tblend;
47 AVFrame *prev_frame; /* only used with tblend */
48} BlendContext;
49
50static const char *const var_names[] = { "X", "Y", "W", "H", "SW", "SH", "T", "N", "A", "B", "TOP", "BOTTOM", NULL };
51enum { 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 };
52
53typedef struct ThreadData {
54 const AVFrame *top, *bottom;
55 AVFrame *dst;
56 AVFilterLink *inlink;
57 int plane;
58 int w, h;
59 FilterParams *param;
60} ThreadData;
61
62#define COMMON_OPTIONS \
63 { "c0_mode", "set component #0 blend mode", OFFSET(params[0].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
64 { "c1_mode", "set component #1 blend mode", OFFSET(params[1].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
65 { "c2_mode", "set component #2 blend mode", OFFSET(params[2].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
66 { "c3_mode", "set component #3 blend mode", OFFSET(params[3].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
67 { "all_mode", "set blend mode for all components", OFFSET(all_mode), AV_OPT_TYPE_INT, {.i64=-1},-1, BLEND_NB-1, FLAGS, "mode"},\
68 { "addition", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_ADDITION}, 0, 0, FLAGS, "mode" },\
69 { "addition128", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_ADDITION128}, 0, 0, FLAGS, "mode" },\
70 { "and", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AND}, 0, 0, FLAGS, "mode" },\
71 { "average", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AVERAGE}, 0, 0, FLAGS, "mode" },\
72 { "burn", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_BURN}, 0, 0, FLAGS, "mode" },\
73 { "darken", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DARKEN}, 0, 0, FLAGS, "mode" },\
74 { "difference", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIFFERENCE}, 0, 0, FLAGS, "mode" },\
75 { "difference128", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIFFERENCE128}, 0, 0, FLAGS, "mode" },\
76 { "divide", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIVIDE}, 0, 0, FLAGS, "mode" },\
77 { "dodge", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DODGE}, 0, 0, FLAGS, "mode" },\
78 { "exclusion", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_EXCLUSION}, 0, 0, FLAGS, "mode" },\
79 { "freeze", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_FREEZE}, 0, 0, FLAGS, "mode" },\
80 { "glow", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GLOW}, 0, 0, FLAGS, "mode" },\
81 { "hardlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDLIGHT}, 0, 0, FLAGS, "mode" },\
82 { "hardmix", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDMIX}, 0, 0, FLAGS, "mode" },\
83 { "heat", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HEAT}, 0, 0, FLAGS, "mode" },\
84 { "lighten", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LIGHTEN}, 0, 0, FLAGS, "mode" },\
85 { "linearlight","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LINEARLIGHT},0, 0, FLAGS, "mode" },\
86 { "multiply", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY}, 0, 0, FLAGS, "mode" },\
87 { "multiply128","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY128},0, 0, FLAGS, "mode" },\
88 { "negation", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NEGATION}, 0, 0, FLAGS, "mode" },\
89 { "normal", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NORMAL}, 0, 0, FLAGS, "mode" },\
90 { "or", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OR}, 0, 0, FLAGS, "mode" },\
91 { "overlay", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OVERLAY}, 0, 0, FLAGS, "mode" },\
92 { "phoenix", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PHOENIX}, 0, 0, FLAGS, "mode" },\
93 { "pinlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PINLIGHT}, 0, 0, FLAGS, "mode" },\
94 { "reflect", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_REFLECT}, 0, 0, FLAGS, "mode" },\
95 { "screen", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SCREEN}, 0, 0, FLAGS, "mode" },\
96 { "softlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SOFTLIGHT}, 0, 0, FLAGS, "mode" },\
97 { "subtract", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SUBTRACT}, 0, 0, FLAGS, "mode" },\
98 { "vividlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_VIVIDLIGHT}, 0, 0, FLAGS, "mode" },\
99 { "xor", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_XOR}, 0, 0, FLAGS, "mode" },\
100 { "c0_expr", "set color component #0 expression", OFFSET(params[0].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
101 { "c1_expr", "set color component #1 expression", OFFSET(params[1].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
102 { "c2_expr", "set color component #2 expression", OFFSET(params[2].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
103 { "c3_expr", "set color component #3 expression", OFFSET(params[3].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
104 { "all_expr", "set expression for all color components", OFFSET(all_expr), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
105 { "c0_opacity", "set color component #0 opacity", OFFSET(params[0].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
106 { "c1_opacity", "set color component #1 opacity", OFFSET(params[1].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
107 { "c2_opacity", "set color component #2 opacity", OFFSET(params[2].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
108 { "c3_opacity", "set color component #3 opacity", OFFSET(params[3].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
109 { "all_opacity", "set opacity for all color components", OFFSET(all_opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS}
110
111#define OFFSET(x) offsetof(BlendContext, x)
112#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
113
114static const AVOption blend_options[] = {
115 COMMON_OPTIONS,
116 { "shortest", "force termination when the shortest input terminates", OFFSET(dinput.shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
117 { "repeatlast", "repeat last bottom frame", OFFSET(dinput.repeatlast), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
118 { NULL }
119};
120
121AVFILTER_DEFINE_CLASS(blend);
122
123#define COPY(src) \
124static void blend_copy ## src(const uint8_t *top, ptrdiff_t top_linesize, \
125 const uint8_t *bottom, ptrdiff_t bottom_linesize,\
126 uint8_t *dst, ptrdiff_t dst_linesize, \
127 ptrdiff_t width, ptrdiff_t height, \
128 FilterParams *param, double *values, int starty) \
129{ \
130 av_image_copy_plane(dst, dst_linesize, src, src ## _linesize, \
131 width, height); \
132}
133
134COPY(top)
135COPY(bottom)
136
137#undef COPY
138
139static void blend_normal_8bit(const uint8_t *top, ptrdiff_t top_linesize,
140 const uint8_t *bottom, ptrdiff_t bottom_linesize,
141 uint8_t *dst, ptrdiff_t dst_linesize,
142 ptrdiff_t width, ptrdiff_t height,
143 FilterParams *param, double *values, int starty)
144{
145 const double opacity = param->opacity;
146 int i, j;
147
148 for (i = 0; i < height; i++) {
149 for (j = 0; j < width; j++) {
150 dst[j] = top[j] * opacity + bottom[j] * (1. - opacity);
151 }
152 dst += dst_linesize;
153 top += top_linesize;
154 bottom += bottom_linesize;
155 }
156}
157
158static void blend_normal_16bit(const uint8_t *_top, ptrdiff_t top_linesize,
159 const uint8_t *_bottom, ptrdiff_t bottom_linesize,
160 uint8_t *_dst, ptrdiff_t dst_linesize,
161 ptrdiff_t width, ptrdiff_t height,
162 FilterParams *param, double *values, int starty)
163{
164 const uint16_t *top = (uint16_t*)_top;
165 const uint16_t *bottom = (uint16_t*)_bottom;
166 uint16_t *dst = (uint16_t*)_dst;
167 const double opacity = param->opacity;
168 int i, j;
169 dst_linesize /= 2;
170 top_linesize /= 2;
171 bottom_linesize /= 2;
172
173 for (i = 0; i < height; i++) {
174 for (j = 0; j < width; j++) {
175 dst[j] = top[j] * opacity + bottom[j] * (1. - opacity);
176 }
177 dst += dst_linesize;
178 top += top_linesize;
179 bottom += bottom_linesize;
180 }
181}
182
183#define DEFINE_BLEND8(name, expr) \
184static void blend_## name##_8bit(const uint8_t *top, ptrdiff_t top_linesize, \
185 const uint8_t *bottom, ptrdiff_t bottom_linesize, \
186 uint8_t *dst, ptrdiff_t dst_linesize, \
187 ptrdiff_t width, ptrdiff_t height, \
188 FilterParams *param, double *values, int starty) \
189{ \
190 double opacity = param->opacity; \
191 int i, j; \
192 \
193 for (i = 0; i < height; i++) { \
194 for (j = 0; j < width; j++) { \
195 dst[j] = top[j] + ((expr) - top[j]) * opacity; \
196 } \
197 dst += dst_linesize; \
198 top += top_linesize; \
199 bottom += bottom_linesize; \
200 } \
201}
202
203#define DEFINE_BLEND16(name, expr) \
204static void blend_## name##_16bit(const uint8_t *_top, ptrdiff_t top_linesize, \
205 const uint8_t *_bottom, ptrdiff_t bottom_linesize, \
206 uint8_t *_dst, ptrdiff_t dst_linesize, \
207 ptrdiff_t width, ptrdiff_t height, \
208 FilterParams *param, double *values, int starty) \
209{ \
210 const uint16_t *top = (uint16_t*)_top; \
211 const uint16_t *bottom = (uint16_t*)_bottom; \
212 uint16_t *dst = (uint16_t*)_dst; \
213 double opacity = param->opacity; \
214 int i, j; \
215 dst_linesize /= 2; \
216 top_linesize /= 2; \
217 bottom_linesize /= 2; \
218 \
219 for (i = 0; i < height; i++) { \
220 for (j = 0; j < width; j++) { \
221 dst[j] = top[j] + ((expr) - top[j]) * opacity; \
222 } \
223 dst += dst_linesize; \
224 top += top_linesize; \
225 bottom += bottom_linesize; \
226 } \
227}
228
229#define A top[j]
230#define B bottom[j]
231
232#define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 255))
233#define SCREEN(x, a, b) (255 - (x) * ((255 - (a)) * (255 - (b)) / 255))
234#define BURN(a, b) (((a) == 0) ? (a) : FFMAX(0, 255 - ((255 - (b)) << 8) / (a)))
235#define DODGE(a, b) (((a) == 255) ? (a) : FFMIN(255, (((b) << 8) / (255 - (a)))))
236
237DEFINE_BLEND8(addition, FFMIN(255, A + B))
238DEFINE_BLEND8(addition128, av_clip_uint8(A + B - 128))
239DEFINE_BLEND8(average, (A + B) / 2)
240DEFINE_BLEND8(subtract, FFMAX(0, A - B))
241DEFINE_BLEND8(multiply, MULTIPLY(1, A, B))
242DEFINE_BLEND8(multiply128,av_clip_uint8((A - 128) * B / 32. + 128))
243DEFINE_BLEND8(negation, 255 - FFABS(255 - A - B))
244DEFINE_BLEND8(difference, FFABS(A - B))
245DEFINE_BLEND8(difference128, av_clip_uint8(128 + A - B))
246DEFINE_BLEND8(screen, SCREEN(1, A, B))
247DEFINE_BLEND8(overlay, (A < 128) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))
248DEFINE_BLEND8(hardlight, (B < 128) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))
249DEFINE_BLEND8(hardmix, (A < (255 - B)) ? 0: 255)
250DEFINE_BLEND8(heat, (A == 0) ? 0 : 255 - FFMIN(((255 - B) * (255 - B)) / A, 255))
251DEFINE_BLEND8(freeze, (B == 0) ? 0 : 255 - FFMIN(((255 - A) * (255 - A)) / B, 255))
252DEFINE_BLEND8(darken, FFMIN(A, B))
253DEFINE_BLEND8(lighten, FFMAX(A, B))
254DEFINE_BLEND8(divide, av_clip_uint8(B == 0 ? 255 : 255 * A / B))
255DEFINE_BLEND8(dodge, DODGE(A, B))
256DEFINE_BLEND8(burn, BURN(A, B))
257DEFINE_BLEND8(softlight, (A > 127) ? B + (255 - B) * (A - 127.5) / 127.5 * (0.5 - fabs(B - 127.5) / 255): B - B * ((127.5 - A) / 127.5) * (0.5 - fabs(B - 127.5)/255))
258DEFINE_BLEND8(exclusion, A + B - 2 * A * B / 255)
259DEFINE_BLEND8(pinlight, (B < 128) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 128)))
260DEFINE_BLEND8(phoenix, FFMIN(A, B) - FFMAX(A, B) + 255)
261DEFINE_BLEND8(reflect, (B == 255) ? B : FFMIN(255, (A * A / (255 - B))))
262DEFINE_BLEND8(glow, (A == 255) ? A : FFMIN(255, (B * B / (255 - A))))
263DEFINE_BLEND8(and, A & B)
264DEFINE_BLEND8(or, A | B)
265DEFINE_BLEND8(xor, A ^ B)
266DEFINE_BLEND8(vividlight, (A < 128) ? BURN(2 * A, B) : DODGE(2 * (A - 128), B))
267DEFINE_BLEND8(linearlight,av_clip_uint8((B < 128) ? B + 2 * A - 255 : B + 2 * (A - 128)))
268
269#undef MULTIPLY
270#undef SCREEN
271#undef BURN
272#undef DODGE
273
274#define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 65535))
275#define SCREEN(x, a, b) (65535 - (x) * ((65535 - (a)) * (65535 - (b)) / 65535))
276#define BURN(a, b) (((a) == 0) ? (a) : FFMAX(0, 65535 - ((65535 - (b)) << 16) / (a)))
277#define DODGE(a, b) (((a) == 65535) ? (a) : FFMIN(65535, (((b) << 16) / (65535 - (a)))))
278
279DEFINE_BLEND16(addition, FFMIN(65535, A + B))
280DEFINE_BLEND16(addition128, av_clip_uint16(A + B - 32768))
281DEFINE_BLEND16(average, (A + B) / 2)
282DEFINE_BLEND16(subtract, FFMAX(0, A - B))
283DEFINE_BLEND16(multiply, MULTIPLY(1, A, B))
284DEFINE_BLEND16(multiply128, av_clip_uint16((A - 32768) * B / 8192. + 32768))
285DEFINE_BLEND16(negation, 65535 - FFABS(65535 - A - B))
286DEFINE_BLEND16(difference, FFABS(A - B))
287DEFINE_BLEND16(difference128, av_clip_uint16(32768 + A - B))
288DEFINE_BLEND16(screen, SCREEN(1, A, B))
289DEFINE_BLEND16(overlay, (A < 32768) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))
290DEFINE_BLEND16(hardlight, (B < 32768) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))
291DEFINE_BLEND16(hardmix, (A < (65535 - B)) ? 0: 65535)
292DEFINE_BLEND16(heat, (A == 0) ? 0 : 65535 - FFMIN(((65535 - B) * (65535 - B)) / A, 65535))
293DEFINE_BLEND16(freeze, (B == 0) ? 0 : 65535 - FFMIN(((65535 - A) * (65535 - A)) / B, 65535))
294DEFINE_BLEND16(darken, FFMIN(A, B))
295DEFINE_BLEND16(lighten, FFMAX(A, B))
296DEFINE_BLEND16(divide, av_clip_uint16(B == 0 ? 65535 : 65535 * A / B))
297DEFINE_BLEND16(dodge, DODGE(A, B))
298DEFINE_BLEND16(burn, BURN(A, B))
299DEFINE_BLEND16(softlight, (A > 32767) ? B + (65535 - B) * (A - 32767.5) / 32767.5 * (0.5 - fabs(B - 32767.5) / 65535): B - B * ((32767.5 - A) / 32767.5) * (0.5 - fabs(B - 32767.5)/65535))
300DEFINE_BLEND16(exclusion, A + B - 2 * A * B / 65535)
301DEFINE_BLEND16(pinlight, (B < 32768) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 32768)))
302DEFINE_BLEND16(phoenix, FFMIN(A, B) - FFMAX(A, B) + 65535)
303DEFINE_BLEND16(reflect, (B == 65535) ? B : FFMIN(65535, (A * A / (65535 - B))))
304DEFINE_BLEND16(glow, (A == 65535) ? A : FFMIN(65535, (B * B / (65535 - A))))
305DEFINE_BLEND16(and, A & B)
306DEFINE_BLEND16(or, A | B)
307DEFINE_BLEND16(xor, A ^ B)
308DEFINE_BLEND16(vividlight, (A < 32768) ? BURN(2 * A, B) : DODGE(2 * (A - 32768), B))
309DEFINE_BLEND16(linearlight,av_clip_uint16((B < 32768) ? B + 2 * A - 65535 : B + 2 * (A - 32768)))
310
311#define DEFINE_BLEND_EXPR(type, name, div) \
312static void blend_expr_## name(const uint8_t *_top, ptrdiff_t top_linesize, \
313 const uint8_t *_bottom, ptrdiff_t bottom_linesize, \
314 uint8_t *_dst, ptrdiff_t dst_linesize, \
315 ptrdiff_t width, ptrdiff_t height, \
316 FilterParams *param, double *values, int starty) \
317{ \
318 const type *top = (type*)_top; \
319 const type *bottom = (type*)_bottom; \
320 type *dst = (type*)_dst; \
321 AVExpr *e = param->e; \
322 int y, x; \
323 dst_linesize /= div; \
324 top_linesize /= div; \
325 bottom_linesize /= div; \
326 \
327 for (y = 0; y < height; y++) { \
328 values[VAR_Y] = y + starty; \
329 for (x = 0; x < width; x++) { \
330 values[VAR_X] = x; \
331 values[VAR_TOP] = values[VAR_A] = top[x]; \
332 values[VAR_BOTTOM] = values[VAR_B] = bottom[x]; \
333 dst[x] = av_expr_eval(e, values, NULL); \
334 } \
335 dst += dst_linesize; \
336 top += top_linesize; \
337 bottom += bottom_linesize; \
338 } \
339}
340
341DEFINE_BLEND_EXPR(uint8_t, 8bit, 1)
342DEFINE_BLEND_EXPR(uint16_t, 16bit, 2)
343
344static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
345{
346 ThreadData *td = arg;
347 int slice_start = (td->h * jobnr ) / nb_jobs;
348 int slice_end = (td->h * (jobnr+1)) / nb_jobs;
349 int height = slice_end - slice_start;
350 const uint8_t *top = td->top->data[td->plane];
351 const uint8_t *bottom = td->bottom->data[td->plane];
352 uint8_t *dst = td->dst->data[td->plane];
353 double values[VAR_VARS_NB];
354
355 values[VAR_N] = td->inlink->frame_count_out;
356 values[VAR_T] = td->dst->pts == AV_NOPTS_VALUE ? NAN : td->dst->pts * av_q2d(td->inlink->time_base);
357 values[VAR_W] = td->w;
358 values[VAR_H] = td->h;
359 values[VAR_SW] = td->w / (double)td->dst->width;
360 values[VAR_SH] = td->h / (double)td->dst->height;
361
362 td->param->blend(top + slice_start * td->top->linesize[td->plane],
363 td->top->linesize[td->plane],
364 bottom + slice_start * td->bottom->linesize[td->plane],
365 td->bottom->linesize[td->plane],
366 dst + slice_start * td->dst->linesize[td->plane],
367 td->dst->linesize[td->plane],
368 td->w, height, td->param, &values[0], slice_start);
369 return 0;
370}
371
372static AVFrame *blend_frame(AVFilterContext *ctx, AVFrame *top_buf,
373 const AVFrame *bottom_buf)
374{
375 BlendContext *s = ctx->priv;
376 AVFilterLink *inlink = ctx->inputs[0];
377 AVFilterLink *outlink = ctx->outputs[0];
378 AVFrame *dst_buf;
379 int plane;
380
381 dst_buf = ff_get_video_buffer(outlink, outlink->w, outlink->h);
382 if (!dst_buf)
383 return top_buf;
384 av_frame_copy_props(dst_buf, top_buf);
385
386 for (plane = 0; plane < s->nb_planes; plane++) {
387 int hsub = plane == 1 || plane == 2 ? s->hsub : 0;
388 int vsub = plane == 1 || plane == 2 ? s->vsub : 0;
389 int outw = AV_CEIL_RSHIFT(dst_buf->width, hsub);
390 int outh = AV_CEIL_RSHIFT(dst_buf->height, vsub);
391 FilterParams *param = &s->params[plane];
392 ThreadData td = { .top = top_buf, .bottom = bottom_buf, .dst = dst_buf,
393 .w = outw, .h = outh, .param = param, .plane = plane,
394 .inlink = inlink };
395
396 ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(outh, ff_filter_get_nb_threads(ctx)));
397 }
398
399 if (!s->tblend)
400 av_frame_free(&top_buf);
401
402 return dst_buf;
403}
404
405static av_cold int init(AVFilterContext *ctx)
406{
407 BlendContext *s = ctx->priv;
408
409 s->tblend = !strcmp(ctx->filter->name, "tblend");
410
411 s->dinput.process = blend_frame;
412 return 0;
413}
414
415static int query_formats(AVFilterContext *ctx)
416{
417 static const enum AVPixelFormat pix_fmts[] = {
418 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
419 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P,AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
420 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
421 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8,
422 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
423 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
424 AV_PIX_FMT_GBRP16, AV_PIX_FMT_GRAY16,
425 AV_PIX_FMT_NONE
426 };
427
428 AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
429 if (!fmts_list)
430 return AVERROR(ENOMEM);
431 return ff_set_common_formats(ctx, fmts_list);
432}
433
434static av_cold void uninit(AVFilterContext *ctx)
435{
436 BlendContext *s = ctx->priv;
437 int i;
438
439 ff_dualinput_uninit(&s->dinput);
440 av_frame_free(&s->prev_frame);
441
442 for (i = 0; i < FF_ARRAY_ELEMS(s->params); i++)
443 av_expr_free(s->params[i].e);
444}
445
446void ff_blend_init(FilterParams *param, int is_16bit)
447{
448 switch (param->mode) {
449 case BLEND_ADDITION: param->blend = is_16bit ? blend_addition_16bit : blend_addition_8bit; break;
450 case BLEND_ADDITION128: param->blend = is_16bit ? blend_addition128_16bit : blend_addition128_8bit; break;
451 case BLEND_AND: param->blend = is_16bit ? blend_and_16bit : blend_and_8bit; break;
452 case BLEND_AVERAGE: param->blend = is_16bit ? blend_average_16bit : blend_average_8bit; break;
453 case BLEND_BURN: param->blend = is_16bit ? blend_burn_16bit : blend_burn_8bit; break;
454 case BLEND_DARKEN: param->blend = is_16bit ? blend_darken_16bit : blend_darken_8bit; break;
455 case BLEND_DIFFERENCE: param->blend = is_16bit ? blend_difference_16bit : blend_difference_8bit; break;
456 case BLEND_DIFFERENCE128: param->blend = is_16bit ? blend_difference128_16bit: blend_difference128_8bit; break;
457 case BLEND_DIVIDE: param->blend = is_16bit ? blend_divide_16bit : blend_divide_8bit; break;
458 case BLEND_DODGE: param->blend = is_16bit ? blend_dodge_16bit : blend_dodge_8bit; break;
459 case BLEND_EXCLUSION: param->blend = is_16bit ? blend_exclusion_16bit : blend_exclusion_8bit; break;
460 case BLEND_FREEZE: param->blend = is_16bit ? blend_freeze_16bit : blend_freeze_8bit; break;
461 case BLEND_GLOW: param->blend = is_16bit ? blend_glow_16bit : blend_glow_8bit; break;
462 case BLEND_HARDLIGHT: param->blend = is_16bit ? blend_hardlight_16bit : blend_hardlight_8bit; break;
463 case BLEND_HARDMIX: param->blend = is_16bit ? blend_hardmix_16bit : blend_hardmix_8bit; break;
464 case BLEND_HEAT: param->blend = is_16bit ? blend_heat_16bit : blend_heat_8bit; break;
465 case BLEND_LIGHTEN: param->blend = is_16bit ? blend_lighten_16bit : blend_lighten_8bit; break;
466 case BLEND_LINEARLIGHT:param->blend = is_16bit ? blend_linearlight_16bit: blend_linearlight_8bit;break;
467 case BLEND_MULTIPLY: param->blend = is_16bit ? blend_multiply_16bit : blend_multiply_8bit; break;
468 case BLEND_MULTIPLY128:param->blend = is_16bit ? blend_multiply128_16bit: blend_multiply128_8bit;break;
469 case BLEND_NEGATION: param->blend = is_16bit ? blend_negation_16bit : blend_negation_8bit; break;
470 case BLEND_NORMAL: param->blend = param->opacity == 1 ? blend_copytop :
471 param->opacity == 0 ? blend_copybottom :
472 is_16bit ? blend_normal_16bit : blend_normal_8bit; break;
473 case BLEND_OR: param->blend = is_16bit ? blend_or_16bit : blend_or_8bit; break;
474 case BLEND_OVERLAY: param->blend = is_16bit ? blend_overlay_16bit : blend_overlay_8bit; break;
475 case BLEND_PHOENIX: param->blend = is_16bit ? blend_phoenix_16bit : blend_phoenix_8bit; break;
476 case BLEND_PINLIGHT: param->blend = is_16bit ? blend_pinlight_16bit : blend_pinlight_8bit; break;
477 case BLEND_REFLECT: param->blend = is_16bit ? blend_reflect_16bit : blend_reflect_8bit; break;
478 case BLEND_SCREEN: param->blend = is_16bit ? blend_screen_16bit : blend_screen_8bit; break;
479 case BLEND_SOFTLIGHT: param->blend = is_16bit ? blend_softlight_16bit : blend_softlight_8bit; break;
480 case BLEND_SUBTRACT: param->blend = is_16bit ? blend_subtract_16bit : blend_subtract_8bit; break;
481 case BLEND_VIVIDLIGHT: param->blend = is_16bit ? blend_vividlight_16bit : blend_vividlight_8bit; break;
482 case BLEND_XOR: param->blend = is_16bit ? blend_xor_16bit : blend_xor_8bit; break;
483 }
484
485 if (param->opacity == 0 && param->mode != BLEND_NORMAL) {
486 param->blend = blend_copytop;
487 }
488
489 if (ARCH_X86)
490 ff_blend_init_x86(param, is_16bit);
491}
492
493static int config_output(AVFilterLink *outlink)
494{
495 AVFilterContext *ctx = outlink->src;
496 AVFilterLink *toplink = ctx->inputs[TOP];
497 BlendContext *s = ctx->priv;
498 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(toplink->format);
499 int ret, plane, is_16bit;
500
501 if (!s->tblend) {
502 AVFilterLink *bottomlink = ctx->inputs[BOTTOM];
503
504 if (toplink->format != bottomlink->format) {
505 av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
506 return AVERROR(EINVAL);
507 }
508 if (toplink->w != bottomlink->w ||
509 toplink->h != bottomlink->h ||
510 toplink->sample_aspect_ratio.num != bottomlink->sample_aspect_ratio.num ||
511 toplink->sample_aspect_ratio.den != bottomlink->sample_aspect_ratio.den) {
512 av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
513 "(size %dx%d, SAR %d:%d) do not match the corresponding "
514 "second input link %s parameters (%dx%d, SAR %d:%d)\n",
515 ctx->input_pads[TOP].name, toplink->w, toplink->h,
516 toplink->sample_aspect_ratio.num,
517 toplink->sample_aspect_ratio.den,
518 ctx->input_pads[BOTTOM].name, bottomlink->w, bottomlink->h,
519 bottomlink->sample_aspect_ratio.num,
520 bottomlink->sample_aspect_ratio.den);
521 return AVERROR(EINVAL);
522 }
523 }
524
525 outlink->w = toplink->w;
526 outlink->h = toplink->h;
527 outlink->time_base = toplink->time_base;
528 outlink->sample_aspect_ratio = toplink->sample_aspect_ratio;
529 outlink->frame_rate = toplink->frame_rate;
530
531 s->hsub = pix_desc->log2_chroma_w;
532 s->vsub = pix_desc->log2_chroma_h;
533
534 is_16bit = pix_desc->comp[0].depth == 16;
535 s->nb_planes = av_pix_fmt_count_planes(toplink->format);
536
537 if (!s->tblend)
538 if ((ret = ff_dualinput_init(ctx, &s->dinput)) < 0)
539 return ret;
540
541 for (plane = 0; plane < FF_ARRAY_ELEMS(s->params); plane++) {
542 FilterParams *param = &s->params[plane];
543
544 if (s->all_mode >= 0)
545 param->mode = s->all_mode;
546 if (s->all_opacity < 1)
547 param->opacity = s->all_opacity;
548
549 ff_blend_init(param, is_16bit);
550
551 if (s->all_expr && !param->expr_str) {
552 param->expr_str = av_strdup(s->all_expr);
553 if (!param->expr_str)
554 return AVERROR(ENOMEM);
555 }
556 if (param->expr_str) {
557 ret = av_expr_parse(&param->e, param->expr_str, var_names,
558 NULL, NULL, NULL, NULL, 0, ctx);
559 if (ret < 0)
560 return ret;
561 param->blend = is_16bit? blend_expr_16bit : blend_expr_8bit;
562 }
563 }
564
565 return 0;
566}
567
568#if CONFIG_BLEND_FILTER
569
570static int request_frame(AVFilterLink *outlink)
571{
572 BlendContext *s = outlink->src->priv;
573 return ff_dualinput_request_frame(&s->dinput, outlink);
574}
575
576static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
577{
578 BlendContext *s = inlink->dst->priv;
579 return ff_dualinput_filter_frame(&s->dinput, inlink, buf);
580}
581
582static const AVFilterPad blend_inputs[] = {
583 {
584 .name = "top",
585 .type = AVMEDIA_TYPE_VIDEO,
586 .filter_frame = filter_frame,
587 },{
588 .name = "bottom",
589 .type = AVMEDIA_TYPE_VIDEO,
590 .filter_frame = filter_frame,
591 },
592 { NULL }
593};
594
595static const AVFilterPad blend_outputs[] = {
596 {
597 .name = "default",
598 .type = AVMEDIA_TYPE_VIDEO,
599 .config_props = config_output,
600 .request_frame = request_frame,
601 },
602 { NULL }
603};
604
605AVFilter ff_vf_blend = {
606 .name = "blend",
607 .description = NULL_IF_CONFIG_SMALL("Blend two video frames into each other."),
608 .init = init,
609 .uninit = uninit,
610 .priv_size = sizeof(BlendContext),
611 .query_formats = query_formats,
612 .inputs = blend_inputs,
613 .outputs = blend_outputs,
614 .priv_class = &blend_class,
615 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
616};
617
618#endif
619
620#if CONFIG_TBLEND_FILTER
621
622static int tblend_filter_frame(AVFilterLink *inlink, AVFrame *frame)
623{
624 BlendContext *s = inlink->dst->priv;
625 AVFilterLink *outlink = inlink->dst->outputs[0];
626
627 if (s->prev_frame) {
628 AVFrame *out = blend_frame(inlink->dst, frame, s->prev_frame);
629 av_frame_free(&s->prev_frame);
630 s->prev_frame = frame;
631 return ff_filter_frame(outlink, out);
632 }
633 s->prev_frame = frame;
634 return 0;
635}
636
637static const AVOption tblend_options[] = {
638 COMMON_OPTIONS,
639 { NULL }
640};
641
642AVFILTER_DEFINE_CLASS(tblend);
643
644static const AVFilterPad tblend_inputs[] = {
645 {
646 .name = "default",
647 .type = AVMEDIA_TYPE_VIDEO,
648 .filter_frame = tblend_filter_frame,
649 },
650 { NULL }
651};
652
653static const AVFilterPad tblend_outputs[] = {
654 {
655 .name = "default",
656 .type = AVMEDIA_TYPE_VIDEO,
657 .config_props = config_output,
658 },
659 { NULL }
660};
661
662AVFilter ff_vf_tblend = {
663 .name = "tblend",
664 .description = NULL_IF_CONFIG_SMALL("Blend successive frames."),
665 .priv_size = sizeof(BlendContext),
666 .priv_class = &tblend_class,
667 .query_formats = query_formats,
668 .init = init,
669 .uninit = uninit,
670 .inputs = tblend_inputs,
671 .outputs = tblend_outputs,
672 .flags = AVFILTER_FLAG_SLICE_THREADS,
673};
674
675#endif
676
generated by cgit at 2024-05-17 06:10:02 (GMT)