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| 1 | +/* |
| 2 | + * Copyright (c) 2016 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 | +/** |
| 22 | + * @file |
| 23 | + * threshold video filter |
| 24 | + */ |
| 25 | + |
| 26 | +#include "libavutil/imgutils.h" |
| 27 | +#include "libavutil/internal.h" |
| 28 | +#include "libavutil/opt.h" |
| 29 | +#include "libavutil/pixdesc.h" |
| 30 | +#include "avfilter.h" |
| 31 | +#include "framesync.h" |
| 32 | +#include "internal.h" |
| 33 | +#include "video.h" |
| 34 | + |
| 35 | +typedef struct ThresholdContext { |
| 36 | + const AVClass *class; |
| 37 | + |
| 38 | + int planes; |
| 39 | + int bpc; |
| 40 | + |
| 41 | + int nb_planes; |
| 42 | + int width[4], height[4]; |
| 43 | + |
| 44 | + void (*threshold)(const uint8_t *in, const uint8_t *threshold, |
| 45 | + const uint8_t *min, const uint8_t *max, |
| 46 | + uint8_t *out, |
| 47 | + ptrdiff_t ilinesize, ptrdiff_t tlinesize, |
| 48 | + ptrdiff_t flinesize, ptrdiff_t slinesize, |
| 49 | + ptrdiff_t olinesize, |
| 50 | + int w, int h); |
| 51 | + |
| 52 | + AVFrame *frames[4]; |
| 53 | + FFFrameSync fs; |
| 54 | +} ThresholdContext; |
| 55 | + |
| 56 | +#define OFFSET(x) offsetof(ThresholdContext, x) |
| 57 | +#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
| 58 | + |
| 59 | +static const AVOption threshold_options[] = { |
| 60 | + { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, FLAGS}, |
| 61 | + { NULL } |
| 62 | +}; |
| 63 | + |
| 64 | +AVFILTER_DEFINE_CLASS(threshold); |
| 65 | + |
| 66 | +static int query_formats(AVFilterContext *ctx) |
| 67 | +{ |
| 68 | + static const enum AVPixelFormat pix_fmts[] = { |
| 69 | + AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, |
| 70 | + AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, |
| 71 | + AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P, |
| 72 | + AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, |
| 73 | + AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, |
| 74 | + AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, |
| 75 | + AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, |
| 76 | + AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, |
| 77 | + AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, |
| 78 | + AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10, |
| 79 | + AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16, |
| 80 | + AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, |
| 81 | + AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16, |
| 82 | + AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP16, |
| 83 | + AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY10, |
| 84 | + AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY16, |
| 85 | + AV_PIX_FMT_NONE |
| 86 | + }; |
| 87 | + |
| 88 | + return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); |
| 89 | +} |
| 90 | + |
| 91 | +static int process_frame(FFFrameSync *fs) |
| 92 | +{ |
| 93 | + AVFilterContext *ctx = fs->parent; |
| 94 | + ThresholdContext *s = fs->opaque; |
| 95 | + AVFilterLink *outlink = ctx->outputs[0]; |
| 96 | + AVFrame *out, *in, *threshold, *min, *max; |
| 97 | + int ret; |
| 98 | + |
| 99 | + if ((ret = ff_framesync_get_frame(&s->fs, 0, &in, 0)) < 0 || |
| 100 | + (ret = ff_framesync_get_frame(&s->fs, 1, &threshold, 0)) < 0 || |
| 101 | + (ret = ff_framesync_get_frame(&s->fs, 2, &min, 0)) < 0 || |
| 102 | + (ret = ff_framesync_get_frame(&s->fs, 3, &max, 0)) < 0) |
| 103 | + return ret; |
| 104 | + |
| 105 | + if (ctx->is_disabled) { |
| 106 | + out = av_frame_clone(in); |
| 107 | + if (!out) |
| 108 | + return AVERROR(ENOMEM); |
| 109 | + } else { |
| 110 | + int p; |
| 111 | + |
| 112 | + out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| 113 | + if (!out) |
| 114 | + return AVERROR(ENOMEM); |
| 115 | + av_frame_copy_props(out, in); |
| 116 | + |
| 117 | + for (p = 0; p < s->nb_planes; p++) { |
| 118 | + if (!(s->planes & (1 << p))) { |
| 119 | + av_image_copy_plane(out->data[p], out->linesize[p], |
| 120 | + in->data[p], in->linesize[p], |
| 121 | + s->width[p] * s->bpc, |
| 122 | + s->height[p]); |
| 123 | + continue; |
| 124 | + } |
| 125 | + s->threshold(in->data[p], threshold->data[p], |
| 126 | + min->data[p], max->data[p], |
| 127 | + out->data[p], |
| 128 | + in->linesize[p], threshold->linesize[p], |
| 129 | + min->linesize[p], max->linesize[p], |
| 130 | + out->linesize[p], |
| 131 | + s->width[p], s->height[p]); |
| 132 | + } |
| 133 | + } |
| 134 | + |
| 135 | + out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base); |
| 136 | + |
| 137 | + return ff_filter_frame(outlink, out); |
| 138 | +} |
| 139 | + |
| 140 | +static void threshold8(const uint8_t *in, const uint8_t *threshold, |
| 141 | + const uint8_t *min, const uint8_t *max, |
| 142 | + uint8_t *out, |
| 143 | + ptrdiff_t ilinesize, ptrdiff_t tlinesize, |
| 144 | + ptrdiff_t flinesize, ptrdiff_t slinesize, |
| 145 | + ptrdiff_t olinesize, |
| 146 | + int w, int h) |
| 147 | +{ |
| 148 | + int x, y; |
| 149 | + |
| 150 | + for (y = 0; y < h; y++) { |
| 151 | + for (x = 0; x < w; x++) { |
| 152 | + out[x] = in[x] < threshold[x] ? min[x] : max[x]; |
| 153 | + } |
| 154 | + |
| 155 | + in += ilinesize; |
| 156 | + threshold += tlinesize; |
| 157 | + min += flinesize; |
| 158 | + max += flinesize; |
| 159 | + out += olinesize; |
| 160 | + } |
| 161 | +} |
| 162 | + |
| 163 | +static void threshold16(const uint8_t *iin, const uint8_t *tthreshold, |
| 164 | + const uint8_t *ffirst, const uint8_t *ssecond, |
| 165 | + uint8_t *oout, |
| 166 | + ptrdiff_t ilinesize, ptrdiff_t tlinesize, |
| 167 | + ptrdiff_t flinesize, ptrdiff_t slinesize, |
| 168 | + ptrdiff_t olinesize, |
| 169 | + int w, int h) |
| 170 | +{ |
| 171 | + const uint16_t *in = (const uint16_t *)iin; |
| 172 | + const uint16_t *threshold = (const uint16_t *)tthreshold; |
| 173 | + const uint16_t *min = (const uint16_t *)ffirst; |
| 174 | + const uint16_t *max = (const uint16_t *)ssecond; |
| 175 | + uint16_t *out = (uint16_t *)oout; |
| 176 | + int x, y; |
| 177 | + |
| 178 | + for (y = 0; y < h; y++) { |
| 179 | + for (x = 0; x < w; x++) { |
| 180 | + out[x] = in[x] < threshold[x] ? min[x] : max[x]; |
| 181 | + } |
| 182 | + |
| 183 | + in += ilinesize / 2; |
| 184 | + threshold += tlinesize / 2; |
| 185 | + min += flinesize / 2; |
| 186 | + max += flinesize / 2; |
| 187 | + out += olinesize / 2; |
| 188 | + } |
| 189 | +} |
| 190 | + |
| 191 | +static int config_input(AVFilterLink *inlink) |
| 192 | +{ |
| 193 | + AVFilterContext *ctx = inlink->dst; |
| 194 | + ThresholdContext *s = ctx->priv; |
| 195 | + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
| 196 | + int vsub, hsub; |
| 197 | + |
| 198 | + s->nb_planes = av_pix_fmt_count_planes(inlink->format); |
| 199 | + |
| 200 | + hsub = desc->log2_chroma_w; |
| 201 | + vsub = desc->log2_chroma_h; |
| 202 | + s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub); |
| 203 | + s->height[0] = s->height[3] = inlink->h; |
| 204 | + s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub); |
| 205 | + s->width[0] = s->width[3] = inlink->w; |
| 206 | + |
| 207 | + if (desc->comp[0].depth == 8) { |
| 208 | + s->threshold = threshold8; |
| 209 | + s->bpc = 1; |
| 210 | + } else { |
| 211 | + s->threshold = threshold16; |
| 212 | + s->bpc = 2; |
| 213 | + } |
| 214 | + |
| 215 | + return 0; |
| 216 | +} |
| 217 | + |
| 218 | +static int config_output(AVFilterLink *outlink) |
| 219 | +{ |
| 220 | + AVFilterContext *ctx = outlink->src; |
| 221 | + ThresholdContext *s = ctx->priv; |
| 222 | + AVFilterLink *base = ctx->inputs[0]; |
| 223 | + AVFilterLink *threshold = ctx->inputs[1]; |
| 224 | + AVFilterLink *min = ctx->inputs[2]; |
| 225 | + AVFilterLink *max = ctx->inputs[3]; |
| 226 | + FFFrameSyncIn *in; |
| 227 | + int ret; |
| 228 | + |
| 229 | + if (base->format != threshold->format || |
| 230 | + base->format != min->format || |
| 231 | + base->format != max->format) { |
| 232 | + av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n"); |
| 233 | + return AVERROR(EINVAL); |
| 234 | + } |
| 235 | + if (base->w != threshold->w || |
| 236 | + base->h != threshold->h || |
| 237 | + base->w != min->w || |
| 238 | + base->h != min->h || |
| 239 | + base->w != max->w || |
| 240 | + base->h != max->h) { |
| 241 | + av_log(ctx, AV_LOG_ERROR, "First input link %s parameters " |
| 242 | + "(size %dx%d) do not match the corresponding " |
| 243 | + "second input link %s parameters (%dx%d) " |
| 244 | + "and/or third input link %s parameters (%dx%d) " |
| 245 | + "and/or fourth input link %s parameters (%dx%d)\n", |
| 246 | + ctx->input_pads[0].name, base->w, base->h, |
| 247 | + ctx->input_pads[1].name, threshold->w, threshold->h, |
| 248 | + ctx->input_pads[2].name, min->w, min->h, |
| 249 | + ctx->input_pads[3].name, max->w, max->h); |
| 250 | + return AVERROR(EINVAL); |
| 251 | + } |
| 252 | + |
| 253 | + outlink->w = base->w; |
| 254 | + outlink->h = base->h; |
| 255 | + outlink->time_base = base->time_base; |
| 256 | + outlink->sample_aspect_ratio = base->sample_aspect_ratio; |
| 257 | + outlink->frame_rate = base->frame_rate; |
| 258 | + |
| 259 | + if ((ret = ff_framesync_init(&s->fs, ctx, 4)) < 0) |
| 260 | + return ret; |
| 261 | + |
| 262 | + in = s->fs.in; |
| 263 | + in[0].time_base = base->time_base; |
| 264 | + in[1].time_base = threshold->time_base; |
| 265 | + in[2].time_base = min->time_base; |
| 266 | + in[3].time_base = max->time_base; |
| 267 | + in[0].sync = 1; |
| 268 | + in[0].before = EXT_STOP; |
| 269 | + in[0].after = EXT_STOP; |
| 270 | + in[1].sync = 1; |
| 271 | + in[1].before = EXT_STOP; |
| 272 | + in[1].after = EXT_STOP; |
| 273 | + in[2].sync = 1; |
| 274 | + in[2].before = EXT_STOP; |
| 275 | + in[2].after = EXT_STOP; |
| 276 | + in[3].sync = 1; |
| 277 | + in[3].before = EXT_STOP; |
| 278 | + in[3].after = EXT_STOP; |
| 279 | + s->fs.opaque = s; |
| 280 | + s->fs.on_event = process_frame; |
| 281 | + |
| 282 | + return ff_framesync_configure(&s->fs); |
| 283 | +} |
| 284 | + |
| 285 | +static int filter_frame(AVFilterLink *inlink, AVFrame *buf) |
| 286 | +{ |
| 287 | + ThresholdContext *s = inlink->dst->priv; |
| 288 | + return ff_framesync_filter_frame(&s->fs, inlink, buf); |
| 289 | +} |
| 290 | + |
| 291 | +static int request_frame(AVFilterLink *outlink) |
| 292 | +{ |
| 293 | + ThresholdContext *s = outlink->src->priv; |
| 294 | + return ff_framesync_request_frame(&s->fs, outlink); |
| 295 | +} |
| 296 | + |
| 297 | +static av_cold void uninit(AVFilterContext *ctx) |
| 298 | +{ |
| 299 | + ThresholdContext *s = ctx->priv; |
| 300 | + |
| 301 | + ff_framesync_uninit(&s->fs); |
| 302 | +} |
| 303 | + |
| 304 | +static const AVFilterPad inputs[] = { |
| 305 | + { |
| 306 | + .name = "default", |
| 307 | + .type = AVMEDIA_TYPE_VIDEO, |
| 308 | + .filter_frame = filter_frame, |
| 309 | + .config_props = config_input, |
| 310 | + }, |
| 311 | + { |
| 312 | + .name = "threshold", |
| 313 | + .type = AVMEDIA_TYPE_VIDEO, |
| 314 | + .filter_frame = filter_frame, |
| 315 | + }, |
| 316 | + { |
| 317 | + .name = "min", |
| 318 | + .type = AVMEDIA_TYPE_VIDEO, |
| 319 | + .filter_frame = filter_frame, |
| 320 | + }, |
| 321 | + { |
| 322 | + .name = "max", |
| 323 | + .type = AVMEDIA_TYPE_VIDEO, |
| 324 | + .filter_frame = filter_frame, |
| 325 | + }, |
| 326 | + { NULL } |
| 327 | +}; |
| 328 | + |
| 329 | +static const AVFilterPad outputs[] = { |
| 330 | + { |
| 331 | + .name = "default", |
| 332 | + .type = AVMEDIA_TYPE_VIDEO, |
| 333 | + .config_props = config_output, |
| 334 | + .request_frame = request_frame, |
| 335 | + }, |
| 336 | + { NULL } |
| 337 | +}; |
| 338 | + |
| 339 | +AVFilter ff_vf_threshold = { |
| 340 | + .name = "threshold", |
| 341 | + .description = NULL_IF_CONFIG_SMALL("Threshold first video stream using other video streams."), |
| 342 | + .priv_size = sizeof(ThresholdContext), |
| 343 | + .priv_class = &threshold_class, |
| 344 | + .uninit = uninit, |
| 345 | + .query_formats = query_formats, |
| 346 | + .inputs = inputs, |
| 347 | + .outputs = outputs, |
| 348 | + .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL, |
| 349 | +}; |