2 * Copyright (c) 2019 Paul B Mahol
4 * This file is part of FFmpeg.
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.
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.
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
21 #include "libavutil/avstring.h"
22 #include "libavutil/imgutils.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/pixdesc.h"
26 #include "libavutil/qsort.h"
31 #include "framesync.h"
34 typedef struct XMedianContext {
36 const AVPixFmtDescriptor *desc;
51 int (*median_frames)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
54 static int query_formats(AVFilterContext *ctx)
56 static const enum AVPixelFormat pixel_fmts[] = {
63 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
64 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
65 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
66 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
67 AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
69 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
70 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
72 AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
74 AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
75 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
76 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
77 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
80 AVFilterFormats *formats = ff_make_format_list(pixel_fmts);
82 return AVERROR(ENOMEM);
83 return ff_set_common_formats(ctx, formats);
86 static av_cold int init(AVFilterContext *ctx)
88 XMedianContext *s = ctx->priv;
91 if (!(s->nb_inputs & 1))
92 av_log(s, AV_LOG_WARNING, "nb_intputs: %d is not odd number.\n", s->nb_inputs);
94 s->nb_inputs = s->nb_inputs | 1;
95 s->radius = s->nb_inputs / 2;
96 s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
98 return AVERROR(ENOMEM);
100 for (int i = 0; i < s->nb_inputs; i++) {
101 AVFilterPad pad = { 0 };
103 pad.type = AVMEDIA_TYPE_VIDEO;
104 pad.name = av_asprintf("input%d", i);
106 return AVERROR(ENOMEM);
108 if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0) {
117 typedef struct ThreadData {
121 static int comparei(const void *p1, const void *p2)
123 int left = *(const int *)p1;
124 int right = *(const int *)p2;
125 return FFDIFFSIGN(left, right);
128 static int median_frames16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
130 XMedianContext *s = ctx->priv;
131 ThreadData *td = arg;
132 AVFrame **in = td->in;
133 AVFrame *out = td->out;
134 const int nb_inputs = s->nb_inputs;
135 const int radius = s->radius;
138 for (int p = 0; p < s->nb_planes; p++) {
139 const int slice_start = (s->height[p] * jobnr) / nb_jobs;
140 const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
141 uint16_t *dst = (uint16_t *)(out->data[p] + slice_start * out->linesize[p]);
143 if (!((1 << p) & s->planes)) {
144 av_image_copy_plane((uint8_t *)dst, out->linesize[p],
145 in[0]->data[p] + slice_start * in[radius]->linesize[p],
147 s->linesize[p], slice_end - slice_start);
151 for (int y = slice_start; y < slice_end; y++) {
152 for (int x = 0; x < s->width[p]; x++) {
153 for (int i = 0; i < nb_inputs; i++) {
154 const uint16_t *src = (const uint16_t *)(in[i]->data[p] + y * in[i]->linesize[p]);
158 AV_QSORT(values, nb_inputs, int, comparei);
159 dst[x] = values[radius];
162 dst += out->linesize[p] / 2;
169 static int median_frames8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
171 XMedianContext *s = ctx->priv;
172 ThreadData *td = arg;
173 AVFrame **in = td->in;
174 AVFrame *out = td->out;
175 const int nb_inputs = s->nb_inputs;
176 const int radius = s->radius;
179 for (int p = 0; p < s->nb_planes; p++) {
180 const int slice_start = (s->height[p] * jobnr) / nb_jobs;
181 const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
182 uint8_t *dst = out->data[p] + slice_start * out->linesize[p];
184 if (!((1 << p) & s->planes)) {
185 av_image_copy_plane(dst, out->linesize[p],
186 in[0]->data[p] + slice_start * in[0]->linesize[p],
188 s->linesize[p], slice_end - slice_start);
192 for (int y = slice_start; y < slice_end; y++) {
193 for (int x = 0; x < s->width[p]; x++) {
194 for (int i = 0; i < nb_inputs; i++)
195 values[i] = in[i]->data[p][y * in[i]->linesize[p] + x];
197 AV_QSORT(values, nb_inputs, int, comparei);
198 dst[x] = values[radius];
201 dst += out->linesize[p];
208 static int process_frame(FFFrameSync *fs)
210 AVFilterContext *ctx = fs->parent;
211 AVFilterLink *outlink = ctx->outputs[0];
212 XMedianContext *s = fs->opaque;
213 AVFrame **in = s->frames;
218 for (i = 0; i < s->nb_inputs; i++) {
219 if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
223 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
225 return AVERROR(ENOMEM);
226 out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
230 ctx->internal->execute(ctx, s->median_frames, &td, NULL, FFMIN(s->height[1], ff_filter_get_nb_threads(ctx)));
232 return ff_filter_frame(outlink, out);
235 static int config_output(AVFilterLink *outlink)
237 AVFilterContext *ctx = outlink->src;
238 XMedianContext *s = ctx->priv;
239 AVRational frame_rate = ctx->inputs[0]->frame_rate;
240 AVFilterLink *inlink = ctx->inputs[0];
241 int height = ctx->inputs[0]->h;
242 int width = ctx->inputs[0]->w;
246 for (int i = 1; i < s->nb_inputs; i++) {
247 if (ctx->inputs[i]->h != height || ctx->inputs[i]->w != width) {
248 av_log(ctx, AV_LOG_ERROR, "Input %d size (%dx%d) does not match input %d size (%dx%d).\n", i, ctx->inputs[i]->w, ctx->inputs[i]->h, 0, width, height);
249 return AVERROR(EINVAL);
253 s->desc = av_pix_fmt_desc_get(outlink->format);
256 s->nb_planes = av_pix_fmt_count_planes(outlink->format);
257 s->depth = s->desc->comp[0].depth;
258 s->max = (1 << s->depth) - 1;
261 s->median_frames = median_frames8;
263 s->median_frames = median_frames16;
265 if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
268 s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w);
269 s->width[0] = s->width[3] = inlink->w;
270 s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
271 s->height[0] = s->height[3] = inlink->h;
275 outlink->frame_rate = frame_rate;
277 if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
282 s->fs.on_event = process_frame;
284 for (i = 0; i < s->nb_inputs; i++) {
285 AVFilterLink *inlink = ctx->inputs[i];
287 in[i].time_base = inlink->time_base;
289 in[i].before = EXT_STOP;
290 in[i].after = EXT_STOP;
293 ret = ff_framesync_configure(&s->fs);
294 outlink->time_base = s->fs.time_base;
299 static av_cold void uninit(AVFilterContext *ctx)
301 XMedianContext *s = ctx->priv;
303 ff_framesync_uninit(&s->fs);
304 av_freep(&s->frames);
306 for (int i = 0; i < ctx->nb_inputs; i++)
307 av_freep(&ctx->input_pads[i].name);
310 static int activate(AVFilterContext *ctx)
312 XMedianContext *s = ctx->priv;
313 return ff_framesync_activate(&s->fs);
316 #define OFFSET(x) offsetof(XMedianContext, x)
317 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
319 static const AVOption xmedian_options[] = {
320 { "nb_inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=3}, 3, 255, .flags = FLAGS },
321 { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, .flags = FLAGS },
325 static const AVFilterPad outputs[] = {
328 .type = AVMEDIA_TYPE_VIDEO,
329 .config_props = config_output,
334 AVFILTER_DEFINE_CLASS(xmedian);
336 AVFilter ff_vf_xmedian = {
338 .description = NULL_IF_CONFIG_SMALL("Pick median pixels from several video inputs."),
339 .priv_size = sizeof(XMedianContext),
340 .priv_class = &xmedian_class,
341 .query_formats = query_formats,
345 .activate = activate,
346 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_SLICE_THREADS,