2 * Copyright (c) 2013 Oka Motofumi (chikuzen.mo at gmail dot com)
3 * Copyright (c) 2016 Paul B Mahol
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/imgutils.h"
23 #include "libavutil/pixdesc.h"
24 #include "libavutil/opt.h"
29 #include "framesync.h"
31 #define OFFSET(x) offsetof(HysteresisContext, x)
32 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
34 typedef struct HysteresisContext {
40 int width[4], height[4];
49 void (*hysteresis)(struct HysteresisContext *s, const uint8_t *bsrc, const uint8_t *osrc, uint8_t *dst,
50 ptrdiff_t blinesize, ptrdiff_t olinesize,
51 ptrdiff_t destlinesize,
55 static const AVOption hysteresis_options[] = {
56 { "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
57 { "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
61 AVFILTER_DEFINE_CLASS(hysteresis);
63 static int query_formats(AVFilterContext *ctx)
65 static const enum AVPixelFormat pix_fmts[] = {
66 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
67 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
68 AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
69 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
70 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
71 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
72 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
73 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
74 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
75 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
76 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
77 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
78 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
79 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
80 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
81 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
82 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY16,
86 return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
89 static int process_frame(FFFrameSync *fs)
91 AVFilterContext *ctx = fs->parent;
92 HysteresisContext *s = fs->opaque;
93 AVFilterLink *outlink = ctx->outputs[0];
94 AVFrame *out, *base, *alt;
97 if ((ret = ff_framesync_get_frame(&s->fs, 0, &base, 0)) < 0 ||
98 (ret = ff_framesync_get_frame(&s->fs, 1, &alt, 0)) < 0)
101 if (ctx->is_disabled) {
102 out = av_frame_clone(base);
104 return AVERROR(ENOMEM);
108 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
110 return AVERROR(ENOMEM);
111 av_frame_copy_props(out, base);
113 for (p = 0; p < s->nb_planes; p++) {
114 if (!((1 << p) & s->planes)) {
115 av_image_copy_plane(out->data[p], out->linesize[p], base->data[p], base->linesize[p],
116 s->width[p], s->height[p]);
121 for (y = 0; y < s->height[p]; y++) {
122 memset(out->data[p] + y * out->linesize[p], 0, s->width[p]);
127 memset(s->map, 0, s->width[0] * s->height[0]);
128 memset(s->xy, 0, s->width[0] * s->height[0] * 4);
130 s->hysteresis(s, base->data[p], alt->data[p],
132 base->linesize[p], alt->linesize[p],
134 s->width[p], s->height[p]);
137 out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
139 return ff_filter_frame(outlink, out);
142 static int passed(HysteresisContext *s, int x, int y, int w)
144 return s->map[x + y * w];
147 static void push(HysteresisContext *s, int x, int y, int w)
149 s->map[x + y * w] = 0xff;
150 s->xy[++s->index] = (uint16_t)(x) << 16 | (uint16_t)y;
153 static void pop(HysteresisContext *s, int *x, int *y)
155 uint32_t val = s->xy[s->index--];
158 *y = val & 0x0000FFFF;
161 static int is_empty(HysteresisContext *s)
166 static void hysteresis8(HysteresisContext *s, const uint8_t *bsrc, const uint8_t *asrc,
168 ptrdiff_t blinesize, ptrdiff_t alinesize,
172 const int t = s->threshold;
175 for (y = 0; y < h; y++) {
176 for (x = 0; x < w; x++) {
177 if ((bsrc[x + y * blinesize] > t) && (asrc[x + y * alinesize] > t) && !passed(s, x, y, w)) {
180 dst[x + y * dlinesize] = asrc[x + y * alinesize];
184 while (!is_empty(s)) {
185 int x_min, x_max, y_min, y_max, yy, xx;
187 pop(s, &posx, &posy);
189 x_min = posx > 0 ? posx - 1 : 0;
190 x_max = posx < w - 1 ? posx + 1 : posx;
191 y_min = posy > 0 ? posy - 1 : 0;
192 y_max = posy < h - 1 ? posy + 1 : posy;
194 for (yy = y_min; yy <= y_max; yy++) {
195 for (xx = x_min; xx <= x_max; xx++) {
196 if ((asrc[xx + yy * alinesize] > t) && !passed(s, xx, yy, w)) {
197 dst[xx + yy * dlinesize] = asrc[xx + yy * alinesize];
208 static void hysteresis16(HysteresisContext *s, const uint8_t *bbsrc, const uint8_t *aasrc,
210 ptrdiff_t blinesize, ptrdiff_t alinesize,
214 const uint16_t *bsrc = (const uint16_t *)bbsrc;
215 const uint16_t *asrc = (const uint16_t *)aasrc;
216 uint16_t *dst = (uint16_t *)ddst;
217 const int t = s->threshold;
224 for (y = 0; y < h; y++) {
225 for (x = 0; x < w; x++) {
226 if ((bsrc[x + y * blinesize] > t) && (asrc[x + y * alinesize] > t) && !passed(s, x, y, w)) {
229 dst[x + y * dlinesize] = asrc[x + y * alinesize];
233 while (!is_empty(s)) {
234 int x_min, x_max, y_min, y_max, yy, xx;
236 pop(s, &posx, &posy);
238 x_min = posx > 0 ? posx - 1 : 0;
239 x_max = posx < w - 1 ? posx + 1 : posx;
240 y_min = posy > 0 ? posy - 1 : 0;
241 y_max = posy < h - 1 ? posy + 1 : posy;
243 for (yy = y_min; yy <= y_max; yy++) {
244 for (xx = x_min; xx <= x_max; xx++) {
245 if ((asrc[xx + yy * alinesize] > t) && !passed(s, xx, yy, w)) {
246 dst[xx + yy * dlinesize] = asrc[xx + yy * alinesize];
257 static int config_input(AVFilterLink *inlink)
259 AVFilterContext *ctx = inlink->dst;
260 HysteresisContext *s = ctx->priv;
261 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
264 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
266 hsub = desc->log2_chroma_w;
267 vsub = desc->log2_chroma_h;
268 s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
269 s->height[0] = s->height[3] = inlink->h;
270 s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
271 s->width[0] = s->width[3] = inlink->w;
273 s->depth = desc->comp[0].depth;
275 if (desc->comp[0].depth == 8)
276 s->hysteresis = hysteresis8;
278 s->hysteresis = hysteresis16;
280 s->map = av_calloc(inlink->w, inlink->h * sizeof (*s->map));
282 return AVERROR(ENOMEM);
284 s->xy = av_calloc(inlink->w, inlink->h * sizeof(*s->xy));
286 return AVERROR(ENOMEM);
291 static int config_output(AVFilterLink *outlink)
293 AVFilterContext *ctx = outlink->src;
294 HysteresisContext *s = ctx->priv;
295 AVFilterLink *base = ctx->inputs[0];
296 AVFilterLink *alt = ctx->inputs[1];
300 if (base->format != alt->format) {
301 av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
302 return AVERROR(EINVAL);
304 if (base->w != alt->w ||
306 base->sample_aspect_ratio.num != alt->sample_aspect_ratio.num ||
307 base->sample_aspect_ratio.den != alt->sample_aspect_ratio.den) {
308 av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
309 "(size %dx%d, SAR %d:%d) do not match the corresponding "
310 "second input link %s parameters (%dx%d, SAR %d:%d)\n",
311 ctx->input_pads[0].name, base->w, base->h,
312 base->sample_aspect_ratio.num,
313 base->sample_aspect_ratio.den,
314 ctx->input_pads[1].name,
316 alt->sample_aspect_ratio.num,
317 alt->sample_aspect_ratio.den);
318 return AVERROR(EINVAL);
321 outlink->w = base->w;
322 outlink->h = base->h;
323 outlink->time_base = base->time_base;
324 outlink->sample_aspect_ratio = base->sample_aspect_ratio;
325 outlink->frame_rate = base->frame_rate;
327 if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
331 in[0].time_base = base->time_base;
332 in[1].time_base = alt->time_base;
334 in[0].before = EXT_STOP;
335 in[0].after = EXT_INFINITY;
337 in[1].before = EXT_STOP;
338 in[1].after = EXT_INFINITY;
340 s->fs.on_event = process_frame;
342 return ff_framesync_configure(&s->fs);
345 static int activate(AVFilterContext *ctx)
347 HysteresisContext *s = ctx->priv;
348 return ff_framesync_activate(&s->fs);
351 static av_cold void uninit(AVFilterContext *ctx)
353 HysteresisContext *s = ctx->priv;
355 ff_framesync_uninit(&s->fs);
360 static const AVFilterPad hysteresis_inputs[] = {
363 .type = AVMEDIA_TYPE_VIDEO,
364 .config_props = config_input,
368 .type = AVMEDIA_TYPE_VIDEO,
373 static const AVFilterPad hysteresis_outputs[] = {
376 .type = AVMEDIA_TYPE_VIDEO,
377 .config_props = config_output,
382 AVFilter ff_vf_hysteresis = {
383 .name = "hysteresis",
384 .description = NULL_IF_CONFIG_SMALL("Grow first stream into second stream by connecting components."),
385 .priv_size = sizeof(HysteresisContext),
387 .query_formats = query_formats,
388 .activate = activate,
389 .inputs = hysteresis_inputs,
390 .outputs = hysteresis_outputs,
391 .priv_class = &hysteresis_class,
392 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,