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path: root/libavfilter/vf_colorchannelmixer.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/opt.h"
22#include "avfilter.h"
23#include "drawutils.h"
24#include "formats.h"
25#include "internal.h"
26#include "video.h"
27
28#define R 0
29#define G 1
30#define B 2
31#define A 3
32
33typedef struct {
34 const AVClass *class;
35 double rr, rg, rb, ra;
36 double gr, gg, gb, ga;
37 double br, bg, bb, ba;
38 double ar, ag, ab, aa;
39
40 int *lut[4][4];
41
42 int *buffer;
43
44 uint8_t rgba_map[4];
45} ColorChannelMixerContext;
46
47#define OFFSET(x) offsetof(ColorChannelMixerContext, x)
48#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
49static const AVOption colorchannelmixer_options[] = {
50 { "rr", "set the red gain for the red channel", OFFSET(rr), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -2, 2, FLAGS },
51 { "rg", "set the green gain for the red channel", OFFSET(rg), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
52 { "rb", "set the blue gain for the red channel", OFFSET(rb), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
53 { "ra", "set the alpha gain for the red channel", OFFSET(ra), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
54 { "gr", "set the red gain for the green channel", OFFSET(gr), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
55 { "gg", "set the green gain for the green channel", OFFSET(gg), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -2, 2, FLAGS },
56 { "gb", "set the blue gain for the green channel", OFFSET(gb), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
57 { "ga", "set the alpha gain for the green channel", OFFSET(ga), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
58 { "br", "set the red gain for the blue channel", OFFSET(br), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
59 { "bg", "set the green gain for the blue channel", OFFSET(bg), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
60 { "bb", "set the blue gain for the blue channel", OFFSET(bb), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -2, 2, FLAGS },
61 { "ba", "set the alpha gain for the blue channel", OFFSET(ba), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
62 { "ar", "set the red gain for the alpha channel", OFFSET(ar), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
63 { "ag", "set the green gain for the alpha channel", OFFSET(ag), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
64 { "ab", "set the blue gain for the alpha channel", OFFSET(ab), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
65 { "aa", "set the alpha gain for the alpha channel", OFFSET(aa), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -2, 2, FLAGS },
66 { NULL }
67};
68
69AVFILTER_DEFINE_CLASS(colorchannelmixer);
70
71static int query_formats(AVFilterContext *ctx)
72{
73 static const enum AVPixelFormat pix_fmts[] = {
74 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
75 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
76 AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
77 AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR,
78 AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
79 AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48,
80 AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64,
81 AV_PIX_FMT_NONE
82 };
83
84 AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
85 if (!fmts_list)
86 return AVERROR(ENOMEM);
87 return ff_set_common_formats(ctx, fmts_list);
88}
89
90static int config_output(AVFilterLink *outlink)
91{
92 AVFilterContext *ctx = outlink->src;
93 ColorChannelMixerContext *s = ctx->priv;
94 int i, j, size, *buffer;
95
96 ff_fill_rgba_map(s->rgba_map, outlink->format);
97
98 switch (outlink->format) {
99 case AV_PIX_FMT_RGB48:
100 case AV_PIX_FMT_BGR48:
101 case AV_PIX_FMT_RGBA64:
102 case AV_PIX_FMT_BGRA64:
103 size = 65536;
104 break;
105 default:
106 size = 256;
107 }
108
109 s->buffer = buffer = av_malloc(16 * size * sizeof(*s->buffer));
110 if (!s->buffer)
111 return AVERROR(ENOMEM);
112
113 for (i = 0; i < 4; i++)
114 for (j = 0; j < 4; j++, buffer += size)
115 s->lut[i][j] = buffer;
116
117 for (i = 0; i < size; i++) {
118 s->lut[R][R][i] = lrint(i * s->rr);
119 s->lut[R][G][i] = lrint(i * s->rg);
120 s->lut[R][B][i] = lrint(i * s->rb);
121 s->lut[R][A][i] = lrint(i * s->ra);
122
123 s->lut[G][R][i] = lrint(i * s->gr);
124 s->lut[G][G][i] = lrint(i * s->gg);
125 s->lut[G][B][i] = lrint(i * s->gb);
126 s->lut[G][A][i] = lrint(i * s->ga);
127
128 s->lut[B][R][i] = lrint(i * s->br);
129 s->lut[B][G][i] = lrint(i * s->bg);
130 s->lut[B][B][i] = lrint(i * s->bb);
131 s->lut[B][A][i] = lrint(i * s->ba);
132
133 s->lut[A][R][i] = lrint(i * s->ar);
134 s->lut[A][G][i] = lrint(i * s->ag);
135 s->lut[A][B][i] = lrint(i * s->ab);
136 s->lut[A][A][i] = lrint(i * s->aa);
137 }
138
139 return 0;
140}
141
142static int filter_frame(AVFilterLink *inlink, AVFrame *in)
143{
144 AVFilterContext *ctx = inlink->dst;
145 ColorChannelMixerContext *s = ctx->priv;
146 AVFilterLink *outlink = ctx->outputs[0];
147 const uint8_t roffset = s->rgba_map[R];
148 const uint8_t goffset = s->rgba_map[G];
149 const uint8_t boffset = s->rgba_map[B];
150 const uint8_t aoffset = s->rgba_map[A];
151 const uint8_t *srcrow = in->data[0];
152 uint8_t *dstrow;
153 AVFrame *out;
154 int i, j;
155
156 if (av_frame_is_writable(in)) {
157 out = in;
158 } else {
159 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
160 if (!out) {
161 av_frame_free(&in);
162 return AVERROR(ENOMEM);
163 }
164 av_frame_copy_props(out, in);
165 }
166
167 dstrow = out->data[0];
168 switch (outlink->format) {
169 case AV_PIX_FMT_BGR24:
170 case AV_PIX_FMT_RGB24:
171 for (i = 0; i < outlink->h; i++) {
172 const uint8_t *src = srcrow;
173 uint8_t *dst = dstrow;
174
175 for (j = 0; j < outlink->w * 3; j += 3) {
176 const uint8_t rin = src[j + roffset];
177 const uint8_t gin = src[j + goffset];
178 const uint8_t bin = src[j + boffset];
179
180 dst[j + roffset] = av_clip_uint8(s->lut[R][R][rin] +
181 s->lut[R][G][gin] +
182 s->lut[R][B][bin]);
183 dst[j + goffset] = av_clip_uint8(s->lut[G][R][rin] +
184 s->lut[G][G][gin] +
185 s->lut[G][B][bin]);
186 dst[j + boffset] = av_clip_uint8(s->lut[B][R][rin] +
187 s->lut[B][G][gin] +
188 s->lut[B][B][bin]);
189 }
190
191 srcrow += in->linesize[0];
192 dstrow += out->linesize[0];
193 }
194 break;
195 case AV_PIX_FMT_0BGR:
196 case AV_PIX_FMT_0RGB:
197 case AV_PIX_FMT_BGR0:
198 case AV_PIX_FMT_RGB0:
199 for (i = 0; i < outlink->h; i++) {
200 const uint8_t *src = srcrow;
201 uint8_t *dst = dstrow;
202
203 for (j = 0; j < outlink->w * 4; j += 4) {
204 const uint8_t rin = src[j + roffset];
205 const uint8_t gin = src[j + goffset];
206 const uint8_t bin = src[j + boffset];
207
208 dst[j + roffset] = av_clip_uint8(s->lut[R][R][rin] +
209 s->lut[R][G][gin] +
210 s->lut[R][B][bin]);
211 dst[j + goffset] = av_clip_uint8(s->lut[G][R][rin] +
212 s->lut[G][G][gin] +
213 s->lut[G][B][bin]);
214 dst[j + boffset] = av_clip_uint8(s->lut[B][R][rin] +
215 s->lut[B][G][gin] +
216 s->lut[B][B][bin]);
217 if (in != out)
218 dst[j + aoffset] = 0;
219 }
220
221 srcrow += in->linesize[0];
222 dstrow += out->linesize[0];
223 }
224 break;
225 case AV_PIX_FMT_ABGR:
226 case AV_PIX_FMT_ARGB:
227 case AV_PIX_FMT_BGRA:
228 case AV_PIX_FMT_RGBA:
229 for (i = 0; i < outlink->h; i++) {
230 const uint8_t *src = srcrow;
231 uint8_t *dst = dstrow;
232
233 for (j = 0; j < outlink->w * 4; j += 4) {
234 const uint8_t rin = src[j + roffset];
235 const uint8_t gin = src[j + goffset];
236 const uint8_t bin = src[j + boffset];
237 const uint8_t ain = src[j + aoffset];
238
239 dst[j + roffset] = av_clip_uint8(s->lut[R][R][rin] +
240 s->lut[R][G][gin] +
241 s->lut[R][B][bin] +
242 s->lut[R][A][ain]);
243 dst[j + goffset] = av_clip_uint8(s->lut[G][R][rin] +
244 s->lut[G][G][gin] +
245 s->lut[G][B][bin] +
246 s->lut[G][A][ain]);
247 dst[j + boffset] = av_clip_uint8(s->lut[B][R][rin] +
248 s->lut[B][G][gin] +
249 s->lut[B][B][bin] +
250 s->lut[B][A][ain]);
251 dst[j + aoffset] = av_clip_uint8(s->lut[A][R][rin] +
252 s->lut[A][G][gin] +
253 s->lut[A][B][bin] +
254 s->lut[A][A][ain]);
255 }
256
257 srcrow += in->linesize[0];
258 dstrow += out->linesize[0];
259 }
260 break;
261 case AV_PIX_FMT_BGR48:
262 case AV_PIX_FMT_RGB48:
263 for (i = 0; i < outlink->h; i++) {
264 const uint16_t *src = (const uint16_t *)srcrow;
265 uint16_t *dst = (uint16_t *)dstrow;
266
267 for (j = 0; j < outlink->w * 3; j += 3) {
268 const uint16_t rin = src[j + roffset];
269 const uint16_t gin = src[j + goffset];
270 const uint16_t bin = src[j + boffset];
271
272 dst[j + roffset] = av_clip_uint16(s->lut[R][R][rin] +
273 s->lut[R][G][gin] +
274 s->lut[R][B][bin]);
275 dst[j + goffset] = av_clip_uint16(s->lut[G][R][rin] +
276 s->lut[G][G][gin] +
277 s->lut[G][B][bin]);
278 dst[j + boffset] = av_clip_uint16(s->lut[B][R][rin] +
279 s->lut[B][G][gin] +
280 s->lut[B][B][bin]);
281 }
282
283 srcrow += in->linesize[0];
284 dstrow += out->linesize[0];
285 }
286 break;
287 case AV_PIX_FMT_BGRA64:
288 case AV_PIX_FMT_RGBA64:
289 for (i = 0; i < outlink->h; i++) {
290 const uint16_t *src = (const uint16_t *)srcrow;
291 uint16_t *dst = (uint16_t *)dstrow;
292
293 for (j = 0; j < outlink->w * 4; j += 4) {
294 const uint16_t rin = src[j + roffset];
295 const uint16_t gin = src[j + goffset];
296 const uint16_t bin = src[j + boffset];
297 const uint16_t ain = src[j + aoffset];
298
299 dst[j + roffset] = av_clip_uint16(s->lut[R][R][rin] +
300 s->lut[R][G][gin] +
301 s->lut[R][B][bin] +
302 s->lut[R][A][ain]);
303 dst[j + goffset] = av_clip_uint16(s->lut[G][R][rin] +
304 s->lut[G][G][gin] +
305 s->lut[G][B][bin] +
306 s->lut[G][A][ain]);
307 dst[j + boffset] = av_clip_uint16(s->lut[B][R][rin] +
308 s->lut[B][G][gin] +
309 s->lut[B][B][bin] +
310 s->lut[B][A][ain]);
311 dst[j + aoffset] = av_clip_uint16(s->lut[A][R][rin] +
312 s->lut[A][G][gin] +
313 s->lut[A][B][bin] +
314 s->lut[A][A][ain]);
315 }
316
317 srcrow += in->linesize[0];
318 dstrow += out->linesize[0];
319 }
320 }
321
322 if (in != out)
323 av_frame_free(&in);
324 return ff_filter_frame(ctx->outputs[0], out);
325}
326
327static av_cold void uninit(AVFilterContext *ctx)
328{
329 ColorChannelMixerContext *s = ctx->priv;
330
331 av_freep(&s->buffer);
332}
333
334static const AVFilterPad colorchannelmixer_inputs[] = {
335 {
336 .name = "default",
337 .type = AVMEDIA_TYPE_VIDEO,
338 .filter_frame = filter_frame,
339 },
340 { NULL }
341};
342
343static const AVFilterPad colorchannelmixer_outputs[] = {
344 {
345 .name = "default",
346 .type = AVMEDIA_TYPE_VIDEO,
347 .config_props = config_output,
348 },
349 { NULL }
350};
351
352AVFilter ff_vf_colorchannelmixer = {
353 .name = "colorchannelmixer",
354 .description = NULL_IF_CONFIG_SMALL("Adjust colors by mixing color channels."),
355 .priv_size = sizeof(ColorChannelMixerContext),
356 .priv_class = &colorchannelmixer_class,
357 .uninit = uninit,
358 .query_formats = query_formats,
359 .inputs = colorchannelmixer_inputs,
360 .outputs = colorchannelmixer_outputs,
361 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
362};
363
generated by cgit at 2024-05-17 06:32:39 (GMT)