1 /*
2 * Copyright (c) 2016 Floris Sluiter
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 * Pixel remap filter
24 * This filter copies pixel by pixel a source frame to a target frame.
25 * It remaps the pixels to a new x,y destination based on two files ymap/xmap.
26 * Map files are passed as a parameter and are in PGM format (P2 or P5),
27 * where the values are y(rows)/x(cols) coordinates of the source_frame.
28 * The *target* frame dimension is based on mapfile dimensions: specified in the
29 * header of the mapfile and reflected in the number of datavalues.
30 * Dimensions of ymap and xmap must be equal. Datavalues must be positive or zero.
31 * Any datavalue in the ymap or xmap which value is higher
32 * then the *source* frame height or width is silently ignored, leaving a
33 * blank/chromakey pixel. This can safely be used as a feature to create overlays.
34 *
35 * Algorithm digest:
36 * Target_frame[y][x] = Source_frame[ ymap[y][x] ][ [xmap[y][x] ];
37 */
38
39 #include "libavutil/colorspace.h"
40 #include "libavutil/imgutils.h"
41 #include "libavutil/pixdesc.h"
42 #include "libavutil/opt.h"
43 #include "avfilter.h"
44 #include "drawutils.h"
45 #include "formats.h"
46 #include "framesync.h"
47 #include "internal.h"
48 #include "video.h"
49
50 typedef struct RemapContext {
51 const AVClass *class;
52 int format;
53
54 int nb_planes;
55 int nb_components;
56 int step;
57 uint8_t fill_rgba[4];
58 int fill_color[4];
59
60 FFFrameSync fs;
61
62 int (*remap_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
63 } RemapContext;
64
65 #define OFFSET(x) offsetof(RemapContext, x)
66 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
67
68 static const AVOption remap_options[] = {
69 { "format", "set output format", OFFSET(format), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "format" },
70 { "color", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, .flags = FLAGS, .unit = "format" },
71 { "gray", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, .flags = FLAGS, .unit = "format" },
72 { "fill", "set the color of the unmapped pixels", OFFSET(fill_rgba), AV_OPT_TYPE_COLOR, {.str="black"}, .flags = FLAGS },
73 { NULL }
74 };
75
76 AVFILTER_DEFINE_CLASS(remap);
77
78 typedef struct ThreadData {
79 AVFrame *in, *xin, *yin, *out;
80 int nb_planes;
81 int nb_components;
82 int step;
83 } ThreadData;
84
query_formats(AVFilterContext * ctx)85 static int query_formats(AVFilterContext *ctx)
86 {
87 RemapContext *s = ctx->priv;
88 static const enum AVPixelFormat pix_fmts[] = {
89 AV_PIX_FMT_YUVA444P,
90 AV_PIX_FMT_YUV444P,
91 AV_PIX_FMT_YUVJ444P,
92 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
93 AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
94 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
95 AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12,
96 AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV444P16,
97 AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
98 AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12,
99 AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
100 AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
101 AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48,
102 AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64,
103 AV_PIX_FMT_NONE
104 };
105 static const enum AVPixelFormat gray_pix_fmts[] = {
106 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9,
107 AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12,
108 AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
109 AV_PIX_FMT_NONE
110 };
111 static const enum AVPixelFormat map_fmts[] = {
112 AV_PIX_FMT_GRAY16,
113 AV_PIX_FMT_NONE
114 };
115 AVFilterFormats *pix_formats = NULL, *map_formats = NULL;
116 int ret;
117
118 if (!(pix_formats = ff_make_format_list(s->format ? gray_pix_fmts : pix_fmts)) ||
119 !(map_formats = ff_make_format_list(map_fmts))) {
120 ret = AVERROR(ENOMEM);
121 goto fail;
122 }
123 if ((ret = ff_formats_ref(pix_formats, &ctx->inputs[0]->out_formats)) < 0 ||
124 (ret = ff_formats_ref(map_formats, &ctx->inputs[1]->out_formats)) < 0 ||
125 (ret = ff_formats_ref(map_formats, &ctx->inputs[2]->out_formats)) < 0 ||
126 (ret = ff_formats_ref(pix_formats, &ctx->outputs[0]->in_formats)) < 0)
127 goto fail;
128 return 0;
129 fail:
130 if (pix_formats)
131 av_freep(&pix_formats->formats);
132 av_freep(&pix_formats);
133 if (map_formats)
134 av_freep(&map_formats->formats);
135 av_freep(&map_formats);
136 return ret;
137 }
138
139 /**
140 * remap_planar algorithm expects planes of same size
141 * pixels are copied from source to target using :
142 * Target_frame[y][x] = Source_frame[ ymap[y][x] ][ [xmap[y][x] ];
143 */
144 #define DEFINE_REMAP_PLANAR_FUNC(name, bits, div) \
145 static int remap_planar##bits##_##name##_slice(AVFilterContext *ctx, void *arg, \
146 int jobnr, int nb_jobs) \
147 { \
148 RemapContext *s = ctx->priv; \
149 const ThreadData *td = arg; \
150 const AVFrame *in = td->in; \
151 const AVFrame *xin = td->xin; \
152 const AVFrame *yin = td->yin; \
153 const AVFrame *out = td->out; \
154 const int slice_start = (out->height * jobnr ) / nb_jobs; \
155 const int slice_end = (out->height * (jobnr+1)) / nb_jobs; \
156 const int xlinesize = xin->linesize[0] / 2; \
157 const int ylinesize = yin->linesize[0] / 2; \
158 int x , y, plane; \
159 \
160 for (plane = 0; plane < td->nb_planes ; plane++) { \
161 const int dlinesize = out->linesize[plane] / div; \
162 const uint##bits##_t *src = (const uint##bits##_t *)in->data[plane]; \
163 uint##bits##_t *dst = (uint##bits##_t *)out->data[plane] + slice_start * dlinesize; \
164 const int slinesize = in->linesize[plane] / div; \
165 const uint16_t *xmap = (const uint16_t *)xin->data[0] + slice_start * xlinesize; \
166 const uint16_t *ymap = (const uint16_t *)yin->data[0] + slice_start * ylinesize; \
167 const int color = s->fill_color[plane]; \
168 \
169 for (y = slice_start; y < slice_end; y++) { \
170 for (x = 0; x < out->width; x++) { \
171 if (ymap[x] < in->height && xmap[x] < in->width) { \
172 dst[x] = src[ymap[x] * slinesize + xmap[x]]; \
173 } else { \
174 dst[x] = color; \
175 } \
176 } \
177 dst += dlinesize; \
178 xmap += xlinesize; \
179 ymap += ylinesize; \
180 } \
181 } \
182 \
183 return 0; \
184 }
185
186 DEFINE_REMAP_PLANAR_FUNC(nearest, 8, 1)
187 DEFINE_REMAP_PLANAR_FUNC(nearest, 16, 2)
188
189 /**
190 * remap_packed algorithm expects pixels with both padded bits (step) and
191 * number of components correctly set.
192 * pixels are copied from source to target using :
193 * Target_frame[y][x] = Source_frame[ ymap[y][x] ][ [xmap[y][x] ];
194 */
195 #define DEFINE_REMAP_PACKED_FUNC(name, bits, div) \
196 static int remap_packed##bits##_##name##_slice(AVFilterContext *ctx, void *arg, \
197 int jobnr, int nb_jobs) \
198 { \
199 RemapContext *s = ctx->priv; \
200 const ThreadData *td = arg; \
201 const AVFrame *in = td->in; \
202 const AVFrame *xin = td->xin; \
203 const AVFrame *yin = td->yin; \
204 const AVFrame *out = td->out; \
205 const int slice_start = (out->height * jobnr ) / nb_jobs; \
206 const int slice_end = (out->height * (jobnr+1)) / nb_jobs; \
207 const int dlinesize = out->linesize[0] / div; \
208 const int slinesize = in->linesize[0] / div; \
209 const int xlinesize = xin->linesize[0] / 2; \
210 const int ylinesize = yin->linesize[0] / 2; \
211 const uint##bits##_t *src = (const uint##bits##_t *)in->data[0]; \
212 uint##bits##_t *dst = (uint##bits##_t *)out->data[0] + slice_start * dlinesize; \
213 const uint16_t *xmap = (const uint16_t *)xin->data[0] + slice_start * xlinesize; \
214 const uint16_t *ymap = (const uint16_t *)yin->data[0] + slice_start * ylinesize; \
215 const int step = td->step / div; \
216 int c, x, y; \
217 \
218 for (y = slice_start; y < slice_end; y++) { \
219 for (x = 0; x < out->width; x++) { \
220 for (c = 0; c < td->nb_components; c++) { \
221 if (ymap[x] < in->height && xmap[x] < in->width) { \
222 dst[x * step + c] = src[ymap[x] * slinesize + xmap[x] * step + c]; \
223 } else { \
224 dst[x * step + c] = s->fill_color[c]; \
225 } \
226 } \
227 } \
228 dst += dlinesize; \
229 xmap += xlinesize; \
230 ymap += ylinesize; \
231 } \
232 \
233 return 0; \
234 }
235
236 DEFINE_REMAP_PACKED_FUNC(nearest, 8, 1)
237 DEFINE_REMAP_PACKED_FUNC(nearest, 16, 2)
238
config_input(AVFilterLink * inlink)239 static int config_input(AVFilterLink *inlink)
240 {
241 AVFilterContext *ctx = inlink->dst;
242 RemapContext *s = ctx->priv;
243 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
244 int depth = desc->comp[0].depth;
245 int is_rgb = !!(desc->flags & AV_PIX_FMT_FLAG_RGB);
246 int factor = 1 << (depth - 8);
247 uint8_t rgba_map[4];
248
249 ff_fill_rgba_map(rgba_map, inlink->format);
250 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
251 s->nb_components = desc->nb_components;
252
253 if (is_rgb) {
254 s->fill_color[rgba_map[0]] = s->fill_rgba[0] * factor;
255 s->fill_color[rgba_map[1]] = s->fill_rgba[1] * factor;
256 s->fill_color[rgba_map[2]] = s->fill_rgba[2] * factor;
257 s->fill_color[rgba_map[3]] = s->fill_rgba[3] * factor;
258 } else {
259 s->fill_color[0] = RGB_TO_Y_BT709(s->fill_rgba[0], s->fill_rgba[1], s->fill_rgba[2]) * factor;
260 s->fill_color[1] = RGB_TO_U_BT709(s->fill_rgba[0], s->fill_rgba[1], s->fill_rgba[2], 0) * factor;
261 s->fill_color[2] = RGB_TO_V_BT709(s->fill_rgba[0], s->fill_rgba[1], s->fill_rgba[2], 0) * factor;
262 s->fill_color[3] = s->fill_rgba[3] * factor;
263 }
264
265 if (depth == 8) {
266 if (s->nb_planes > 1 || s->nb_components == 1) {
267 s->remap_slice = remap_planar8_nearest_slice;
268 } else {
269 s->remap_slice = remap_packed8_nearest_slice;
270 }
271 } else {
272 if (s->nb_planes > 1 || s->nb_components == 1) {
273 s->remap_slice = remap_planar16_nearest_slice;
274 } else {
275 s->remap_slice = remap_packed16_nearest_slice;
276 }
277 }
278
279 s->step = av_get_padded_bits_per_pixel(desc) >> 3;
280 return 0;
281 }
282
process_frame(FFFrameSync * fs)283 static int process_frame(FFFrameSync *fs)
284 {
285 AVFilterContext *ctx = fs->parent;
286 RemapContext *s = fs->opaque;
287 AVFilterLink *outlink = ctx->outputs[0];
288 AVFrame *out, *in, *xpic, *ypic;
289 int ret;
290
291 if ((ret = ff_framesync_get_frame(&s->fs, 0, &in, 0)) < 0 ||
292 (ret = ff_framesync_get_frame(&s->fs, 1, &xpic, 0)) < 0 ||
293 (ret = ff_framesync_get_frame(&s->fs, 2, &ypic, 0)) < 0)
294 return ret;
295
296 if (ctx->is_disabled) {
297 out = av_frame_clone(in);
298 if (!out)
299 return AVERROR(ENOMEM);
300 } else {
301 ThreadData td;
302
303 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
304 if (!out)
305 return AVERROR(ENOMEM);
306 av_frame_copy_props(out, in);
307
308 td.in = in;
309 td.xin = xpic;
310 td.yin = ypic;
311 td.out = out;
312 td.nb_planes = s->nb_planes;
313 td.nb_components = s->nb_components;
314 td.step = s->step;
315 ctx->internal->execute(ctx, s->remap_slice, &td, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
316 }
317 out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
318
319 return ff_filter_frame(outlink, out);
320 }
321
config_output(AVFilterLink * outlink)322 static int config_output(AVFilterLink *outlink)
323 {
324 AVFilterContext *ctx = outlink->src;
325 RemapContext *s = ctx->priv;
326 AVFilterLink *srclink = ctx->inputs[0];
327 AVFilterLink *xlink = ctx->inputs[1];
328 AVFilterLink *ylink = ctx->inputs[2];
329 FFFrameSyncIn *in;
330 int ret;
331
332 if (xlink->w != ylink->w || xlink->h != ylink->h) {
333 av_log(ctx, AV_LOG_ERROR, "Second input link %s parameters "
334 "(size %dx%d) do not match the corresponding "
335 "third input link %s parameters (%dx%d)\n",
336 ctx->input_pads[1].name, xlink->w, xlink->h,
337 ctx->input_pads[2].name, ylink->w, ylink->h);
338 return AVERROR(EINVAL);
339 }
340
341 outlink->w = xlink->w;
342 outlink->h = xlink->h;
343 outlink->sample_aspect_ratio = srclink->sample_aspect_ratio;
344 outlink->frame_rate = srclink->frame_rate;
345
346 ret = ff_framesync_init(&s->fs, ctx, 3);
347 if (ret < 0)
348 return ret;
349
350 in = s->fs.in;
351 in[0].time_base = srclink->time_base;
352 in[1].time_base = xlink->time_base;
353 in[2].time_base = ylink->time_base;
354 in[0].sync = 2;
355 in[0].before = EXT_STOP;
356 in[0].after = EXT_STOP;
357 in[1].sync = 1;
358 in[1].before = EXT_NULL;
359 in[1].after = EXT_INFINITY;
360 in[2].sync = 1;
361 in[2].before = EXT_NULL;
362 in[2].after = EXT_INFINITY;
363 s->fs.opaque = s;
364 s->fs.on_event = process_frame;
365
366 ret = ff_framesync_configure(&s->fs);
367 outlink->time_base = s->fs.time_base;
368
369 return ret;
370 }
371
activate(AVFilterContext * ctx)372 static int activate(AVFilterContext *ctx)
373 {
374 RemapContext *s = ctx->priv;
375 return ff_framesync_activate(&s->fs);
376 }
377
uninit(AVFilterContext * ctx)378 static av_cold void uninit(AVFilterContext *ctx)
379 {
380 RemapContext *s = ctx->priv;
381
382 ff_framesync_uninit(&s->fs);
383 }
384
385 static const AVFilterPad remap_inputs[] = {
386 {
387 .name = "source",
388 .type = AVMEDIA_TYPE_VIDEO,
389 .config_props = config_input,
390 },
391 {
392 .name = "xmap",
393 .type = AVMEDIA_TYPE_VIDEO,
394 },
395 {
396 .name = "ymap",
397 .type = AVMEDIA_TYPE_VIDEO,
398 },
399 { NULL }
400 };
401
402 static const AVFilterPad remap_outputs[] = {
403 {
404 .name = "default",
405 .type = AVMEDIA_TYPE_VIDEO,
406 .config_props = config_output,
407 },
408 { NULL }
409 };
410
411 AVFilter ff_vf_remap = {
412 .name = "remap",
413 .description = NULL_IF_CONFIG_SMALL("Remap pixels."),
414 .priv_size = sizeof(RemapContext),
415 .uninit = uninit,
416 .query_formats = query_formats,
417 .activate = activate,
418 .inputs = remap_inputs,
419 .outputs = remap_outputs,
420 .priv_class = &remap_class,
421 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
422 };
423