| 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 | |
| 33 | typedef 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 |
| 49 | static 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 | |
| 69 | AVFILTER_DEFINE_CLASS(colorchannelmixer); |
| 70 | |
| 71 | static 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 | ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); |
| 85 | return 0; |
| 86 | } |
| 87 | |
| 88 | static int config_output(AVFilterLink *outlink) |
| 89 | { |
| 90 | AVFilterContext *ctx = outlink->src; |
| 91 | ColorChannelMixerContext *cm = ctx->priv; |
| 92 | int i, j, size, *buffer; |
| 93 | |
| 94 | ff_fill_rgba_map(cm->rgba_map, outlink->format); |
| 95 | |
| 96 | switch (outlink->format) { |
| 97 | case AV_PIX_FMT_RGB48: |
| 98 | case AV_PIX_FMT_BGR48: |
| 99 | case AV_PIX_FMT_RGBA64: |
| 100 | case AV_PIX_FMT_BGRA64: |
| 101 | size = 65536; |
| 102 | break; |
| 103 | default: |
| 104 | size = 256; |
| 105 | } |
| 106 | |
| 107 | cm->buffer = buffer = av_malloc(16 * size * sizeof(*cm->buffer)); |
| 108 | if (!cm->buffer) |
| 109 | return AVERROR(ENOMEM); |
| 110 | |
| 111 | for (i = 0; i < 4; i++) |
| 112 | for (j = 0; j < 4; j++, buffer += size) |
| 113 | cm->lut[i][j] = buffer; |
| 114 | |
| 115 | for (i = 0; i < size; i++) { |
| 116 | cm->lut[R][R][i] = round(i * cm->rr); |
| 117 | cm->lut[R][G][i] = round(i * cm->rg); |
| 118 | cm->lut[R][B][i] = round(i * cm->rb); |
| 119 | cm->lut[R][A][i] = round(i * cm->ra); |
| 120 | |
| 121 | cm->lut[G][R][i] = round(i * cm->gr); |
| 122 | cm->lut[G][G][i] = round(i * cm->gg); |
| 123 | cm->lut[G][B][i] = round(i * cm->gb); |
| 124 | cm->lut[G][A][i] = round(i * cm->ga); |
| 125 | |
| 126 | cm->lut[B][R][i] = round(i * cm->br); |
| 127 | cm->lut[B][G][i] = round(i * cm->bg); |
| 128 | cm->lut[B][B][i] = round(i * cm->bb); |
| 129 | cm->lut[B][A][i] = round(i * cm->ba); |
| 130 | |
| 131 | cm->lut[A][R][i] = round(i * cm->ar); |
| 132 | cm->lut[A][G][i] = round(i * cm->ag); |
| 133 | cm->lut[A][B][i] = round(i * cm->ab); |
| 134 | cm->lut[A][A][i] = round(i * cm->aa); |
| 135 | } |
| 136 | |
| 137 | return 0; |
| 138 | } |
| 139 | |
| 140 | static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
| 141 | { |
| 142 | AVFilterContext *ctx = inlink->dst; |
| 143 | ColorChannelMixerContext *cm = ctx->priv; |
| 144 | AVFilterLink *outlink = ctx->outputs[0]; |
| 145 | const uint8_t roffset = cm->rgba_map[R]; |
| 146 | const uint8_t goffset = cm->rgba_map[G]; |
| 147 | const uint8_t boffset = cm->rgba_map[B]; |
| 148 | const uint8_t aoffset = cm->rgba_map[A]; |
| 149 | const uint8_t *srcrow = in->data[0]; |
| 150 | uint8_t *dstrow; |
| 151 | AVFrame *out; |
| 152 | int i, j; |
| 153 | |
| 154 | if (av_frame_is_writable(in)) { |
| 155 | out = in; |
| 156 | } else { |
| 157 | out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| 158 | if (!out) { |
| 159 | av_frame_free(&in); |
| 160 | return AVERROR(ENOMEM); |
| 161 | } |
| 162 | av_frame_copy_props(out, in); |
| 163 | } |
| 164 | |
| 165 | dstrow = out->data[0]; |
| 166 | switch (outlink->format) { |
| 167 | case AV_PIX_FMT_BGR24: |
| 168 | case AV_PIX_FMT_RGB24: |
| 169 | for (i = 0; i < outlink->h; i++) { |
| 170 | const uint8_t *src = srcrow; |
| 171 | uint8_t *dst = dstrow; |
| 172 | |
| 173 | for (j = 0; j < outlink->w * 3; j += 3) { |
| 174 | const uint8_t rin = src[j + roffset]; |
| 175 | const uint8_t gin = src[j + goffset]; |
| 176 | const uint8_t bin = src[j + boffset]; |
| 177 | |
| 178 | dst[j + roffset] = av_clip_uint8(cm->lut[R][R][rin] + |
| 179 | cm->lut[R][G][gin] + |
| 180 | cm->lut[R][B][bin]); |
| 181 | dst[j + goffset] = av_clip_uint8(cm->lut[G][R][rin] + |
| 182 | cm->lut[G][G][gin] + |
| 183 | cm->lut[G][B][bin]); |
| 184 | dst[j + boffset] = av_clip_uint8(cm->lut[B][R][rin] + |
| 185 | cm->lut[B][G][gin] + |
| 186 | cm->lut[B][B][bin]); |
| 187 | } |
| 188 | |
| 189 | srcrow += in->linesize[0]; |
| 190 | dstrow += out->linesize[0]; |
| 191 | } |
| 192 | break; |
| 193 | case AV_PIX_FMT_0BGR: |
| 194 | case AV_PIX_FMT_0RGB: |
| 195 | case AV_PIX_FMT_BGR0: |
| 196 | case AV_PIX_FMT_RGB0: |
| 197 | for (i = 0; i < outlink->h; i++) { |
| 198 | const uint8_t *src = srcrow; |
| 199 | uint8_t *dst = dstrow; |
| 200 | |
| 201 | for (j = 0; j < outlink->w * 4; j += 4) { |
| 202 | const uint8_t rin = src[j + roffset]; |
| 203 | const uint8_t gin = src[j + goffset]; |
| 204 | const uint8_t bin = src[j + boffset]; |
| 205 | |
| 206 | dst[j + roffset] = av_clip_uint8(cm->lut[R][R][rin] + |
| 207 | cm->lut[R][G][gin] + |
| 208 | cm->lut[R][B][bin]); |
| 209 | dst[j + goffset] = av_clip_uint8(cm->lut[G][R][rin] + |
| 210 | cm->lut[G][G][gin] + |
| 211 | cm->lut[G][B][bin]); |
| 212 | dst[j + boffset] = av_clip_uint8(cm->lut[B][R][rin] + |
| 213 | cm->lut[B][G][gin] + |
| 214 | cm->lut[B][B][bin]); |
| 215 | if (in != out) |
| 216 | dst[j + aoffset] = 0; |
| 217 | } |
| 218 | |
| 219 | srcrow += in->linesize[0]; |
| 220 | dstrow += out->linesize[0]; |
| 221 | } |
| 222 | break; |
| 223 | case AV_PIX_FMT_ABGR: |
| 224 | case AV_PIX_FMT_ARGB: |
| 225 | case AV_PIX_FMT_BGRA: |
| 226 | case AV_PIX_FMT_RGBA: |
| 227 | for (i = 0; i < outlink->h; i++) { |
| 228 | const uint8_t *src = srcrow; |
| 229 | uint8_t *dst = dstrow; |
| 230 | |
| 231 | for (j = 0; j < outlink->w * 4; j += 4) { |
| 232 | const uint8_t rin = src[j + roffset]; |
| 233 | const uint8_t gin = src[j + goffset]; |
| 234 | const uint8_t bin = src[j + boffset]; |
| 235 | const uint8_t ain = src[j + aoffset]; |
| 236 | |
| 237 | dst[j + roffset] = av_clip_uint8(cm->lut[R][R][rin] + |
| 238 | cm->lut[R][G][gin] + |
| 239 | cm->lut[R][B][bin] + |
| 240 | cm->lut[R][A][ain]); |
| 241 | dst[j + goffset] = av_clip_uint8(cm->lut[G][R][rin] + |
| 242 | cm->lut[G][G][gin] + |
| 243 | cm->lut[G][B][bin] + |
| 244 | cm->lut[G][A][ain]); |
| 245 | dst[j + boffset] = av_clip_uint8(cm->lut[B][R][rin] + |
| 246 | cm->lut[B][G][gin] + |
| 247 | cm->lut[B][B][bin] + |
| 248 | cm->lut[B][A][ain]); |
| 249 | dst[j + aoffset] = av_clip_uint8(cm->lut[A][R][rin] + |
| 250 | cm->lut[A][G][gin] + |
| 251 | cm->lut[A][B][bin] + |
| 252 | cm->lut[A][A][ain]); |
| 253 | } |
| 254 | |
| 255 | srcrow += in->linesize[0]; |
| 256 | dstrow += out->linesize[0]; |
| 257 | } |
| 258 | break; |
| 259 | case AV_PIX_FMT_BGR48: |
| 260 | case AV_PIX_FMT_RGB48: |
| 261 | for (i = 0; i < outlink->h; i++) { |
| 262 | const uint16_t *src = (const uint16_t *)srcrow; |
| 263 | uint16_t *dst = (uint16_t *)dstrow; |
| 264 | |
| 265 | for (j = 0; j < outlink->w * 3; j += 3) { |
| 266 | const uint16_t rin = src[j + roffset]; |
| 267 | const uint16_t gin = src[j + goffset]; |
| 268 | const uint16_t bin = src[j + boffset]; |
| 269 | |
| 270 | dst[j + roffset] = av_clip_uint16(cm->lut[R][R][rin] + |
| 271 | cm->lut[R][G][gin] + |
| 272 | cm->lut[R][B][bin]); |
| 273 | dst[j + goffset] = av_clip_uint16(cm->lut[G][R][rin] + |
| 274 | cm->lut[G][G][gin] + |
| 275 | cm->lut[G][B][bin]); |
| 276 | dst[j + boffset] = av_clip_uint16(cm->lut[B][R][rin] + |
| 277 | cm->lut[B][G][gin] + |
| 278 | cm->lut[B][B][bin]); |
| 279 | } |
| 280 | |
| 281 | srcrow += in->linesize[0]; |
| 282 | dstrow += out->linesize[0]; |
| 283 | } |
| 284 | break; |
| 285 | case AV_PIX_FMT_BGRA64: |
| 286 | case AV_PIX_FMT_RGBA64: |
| 287 | for (i = 0; i < outlink->h; i++) { |
| 288 | const uint16_t *src = (const uint16_t *)srcrow; |
| 289 | uint16_t *dst = (uint16_t *)dstrow; |
| 290 | |
| 291 | for (j = 0; j < outlink->w * 4; j += 4) { |
| 292 | const uint16_t rin = src[j + roffset]; |
| 293 | const uint16_t gin = src[j + goffset]; |
| 294 | const uint16_t bin = src[j + boffset]; |
| 295 | const uint16_t ain = src[j + aoffset]; |
| 296 | |
| 297 | dst[j + roffset] = av_clip_uint16(cm->lut[R][R][rin] + |
| 298 | cm->lut[R][G][gin] + |
| 299 | cm->lut[R][B][bin] + |
| 300 | cm->lut[R][A][ain]); |
| 301 | dst[j + goffset] = av_clip_uint16(cm->lut[G][R][rin] + |
| 302 | cm->lut[G][G][gin] + |
| 303 | cm->lut[G][B][bin] + |
| 304 | cm->lut[G][A][ain]); |
| 305 | dst[j + boffset] = av_clip_uint16(cm->lut[B][R][rin] + |
| 306 | cm->lut[B][G][gin] + |
| 307 | cm->lut[B][B][bin] + |
| 308 | cm->lut[B][A][ain]); |
| 309 | dst[j + aoffset] = av_clip_uint16(cm->lut[A][R][rin] + |
| 310 | cm->lut[A][G][gin] + |
| 311 | cm->lut[A][B][bin] + |
| 312 | cm->lut[A][A][ain]); |
| 313 | } |
| 314 | |
| 315 | srcrow += in->linesize[0]; |
| 316 | dstrow += out->linesize[0]; |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | if (in != out) |
| 321 | av_frame_free(&in); |
| 322 | return ff_filter_frame(ctx->outputs[0], out); |
| 323 | } |
| 324 | |
| 325 | static av_cold void uninit(AVFilterContext *ctx) |
| 326 | { |
| 327 | ColorChannelMixerContext *cm = ctx->priv; |
| 328 | |
| 329 | av_freep(&cm->buffer); |
| 330 | } |
| 331 | |
| 332 | static const AVFilterPad colorchannelmixer_inputs[] = { |
| 333 | { |
| 334 | .name = "default", |
| 335 | .type = AVMEDIA_TYPE_VIDEO, |
| 336 | .filter_frame = filter_frame, |
| 337 | }, |
| 338 | { NULL } |
| 339 | }; |
| 340 | |
| 341 | static const AVFilterPad colorchannelmixer_outputs[] = { |
| 342 | { |
| 343 | .name = "default", |
| 344 | .type = AVMEDIA_TYPE_VIDEO, |
| 345 | .config_props = config_output, |
| 346 | }, |
| 347 | { NULL } |
| 348 | }; |
| 349 | |
| 350 | AVFilter ff_vf_colorchannelmixer = { |
| 351 | .name = "colorchannelmixer", |
| 352 | .description = NULL_IF_CONFIG_SMALL("Adjust colors by mixing color channels."), |
| 353 | .priv_size = sizeof(ColorChannelMixerContext), |
| 354 | .priv_class = &colorchannelmixer_class, |
| 355 | .uninit = uninit, |
| 356 | .query_formats = query_formats, |
| 357 | .inputs = colorchannelmixer_inputs, |
| 358 | .outputs = colorchannelmixer_outputs, |
| 359 | .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
| 360 | }; |