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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavfilter / vf_drawbox.c
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2ba45a60
DM		 1/*
2 * Copyright (c) 2008 Affine Systems, Inc (Michael Sullivan, Bobby Impollonia)
3 * Copyright (c) 2013 Andrey Utkin <andrey.krieger.utkin gmail com>
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22/**
23 * @file
24 * Box and grid drawing filters. Also a nice template for a filter
25 * that needs to write in the input frame.
26 */
27
28#include "libavutil/colorspace.h"
29#include "libavutil/common.h"
30#include "libavutil/opt.h"
31#include "libavutil/eval.h"
32#include "libavutil/pixdesc.h"
33#include "libavutil/parseutils.h"
34#include "avfilter.h"
35#include "formats.h"
36#include "internal.h"
37#include "video.h"
38
39static const char *const var_names[] = {
40 "dar",
41 "hsub", "vsub",
42 "in_h", "ih", ///< height of the input video
43 "in_w", "iw", ///< width of the input video
44 "sar",
45 "x",
46 "y",
47 "h", ///< height of the rendered box
48 "w", ///< width of the rendered box
49 "t",
50 NULL
51};
52
53enum { Y, U, V, A };
54
55enum var_name {
56 VAR_DAR,
57 VAR_HSUB, VAR_VSUB,
58 VAR_IN_H, VAR_IH,
59 VAR_IN_W, VAR_IW,
60 VAR_SAR,
61 VAR_X,
62 VAR_Y,
63 VAR_H,
64 VAR_W,
65 VAR_T,
66 VARS_NB
67};
68
69typedef struct DrawBoxContext {
70 const AVClass *class;
71 int x, y, w, h;
72 int thickness;
73 char *color_str;
74 unsigned char yuv_color[4];
75 int invert_color; ///< invert luma color
76 int vsub, hsub; ///< chroma subsampling
77 char *x_expr, *y_expr; ///< expression for x and y
78 char *w_expr, *h_expr; ///< expression for width and height
79 char *t_expr; ///< expression for thickness
80} DrawBoxContext;
81
82static const int NUM_EXPR_EVALS = 5;
83
84static av_cold int init(AVFilterContext *ctx)
85{
86 DrawBoxContext *s = ctx->priv;
87 uint8_t rgba_color[4];
88
89 if (!strcmp(s->color_str, "invert"))
90 s->invert_color = 1;
91 else if (av_parse_color(rgba_color, s->color_str, -1, ctx) < 0)
92 return AVERROR(EINVAL);
93
94 if (!s->invert_color) {
95 s->yuv_color[Y] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]);
96 s->yuv_color[U] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
97 s->yuv_color[V] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
98 s->yuv_color[A] = rgba_color[3];
99 }
100
101 return 0;
102}
103
104static int query_formats(AVFilterContext *ctx)
105{
106 static const enum AVPixelFormat pix_fmts[] = {
107 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
108 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
109 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
110 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
111 AV_PIX_FMT_NONE
112 };
113
114 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
115 return 0;
116}
117
118static int config_input(AVFilterLink *inlink)
119{
120 AVFilterContext *ctx = inlink->dst;
121 DrawBoxContext *s = ctx->priv;
122 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
123 double var_values[VARS_NB], res;
124 char *expr;
125 int ret;
126 int i;
127
128 s->hsub = desc->log2_chroma_w;
129 s->vsub = desc->log2_chroma_h;
130
131 var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h;
132 var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w;
133 var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ? av_q2d(inlink->sample_aspect_ratio) : 1;
134 var_values[VAR_DAR] = (double)inlink->w / inlink->h * var_values[VAR_SAR];
135 var_values[VAR_HSUB] = s->hsub;
136 var_values[VAR_VSUB] = s->vsub;
137 var_values[VAR_X] = NAN;
138 var_values[VAR_Y] = NAN;
139 var_values[VAR_H] = NAN;
140 var_values[VAR_W] = NAN;
141 var_values[VAR_T] = NAN;
142
143 for (i = 0; i <= NUM_EXPR_EVALS; i++) {
144 /* evaluate expressions, fail on last iteration */
145 if ((ret = av_expr_parse_and_eval(&res, (expr = s->x_expr),
146 var_names, var_values,
147 NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0 && i == NUM_EXPR_EVALS)
148 goto fail;
149 s->x = var_values[VAR_X] = res;
150
151 if ((ret = av_expr_parse_and_eval(&res, (expr = s->y_expr),
152 var_names, var_values,
153 NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0 && i == NUM_EXPR_EVALS)
154 goto fail;
155 s->y = var_values[VAR_Y] = res;
156
157 if ((ret = av_expr_parse_and_eval(&res, (expr = s->w_expr),
158 var_names, var_values,
159 NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0 && i == NUM_EXPR_EVALS)
160 goto fail;
161 s->w = var_values[VAR_W] = res;
162
163 if ((ret = av_expr_parse_and_eval(&res, (expr = s->h_expr),
164 var_names, var_values,
165 NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0 && i == NUM_EXPR_EVALS)
166 goto fail;
167 s->h = var_values[VAR_H] = res;
168
169 if ((ret = av_expr_parse_and_eval(&res, (expr = s->t_expr),
170 var_names, var_values,
171 NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0 && i == NUM_EXPR_EVALS)
172 goto fail;
173 s->thickness = var_values[VAR_T] = res;
174 }
175
176 /* if w or h are zero, use the input w/h */
177 s->w = (s->w > 0) ? s->w : inlink->w;
178 s->h = (s->h > 0) ? s->h : inlink->h;
179
180 /* sanity check width and height */
181 if (s->w < 0 || s->h < 0) {
182 av_log(ctx, AV_LOG_ERROR, "Size values less than 0 are not acceptable.\n");
183 return AVERROR(EINVAL);
184 }
185
186 av_log(ctx, AV_LOG_VERBOSE, "x:%d y:%d w:%d h:%d color:0x%02X%02X%02X%02X\n",
187 s->x, s->y, s->w, s->h,
188 s->yuv_color[Y], s->yuv_color[U], s->yuv_color[V], s->yuv_color[A]);
189
190 return 0;
191
192fail:
193 av_log(ctx, AV_LOG_ERROR,
194 "Error when evaluating the expression '%s'.\n",
195 expr);
196 return ret;
197}
198
199static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
200{
201 DrawBoxContext *s = inlink->dst->priv;
202 int plane, x, y, xb = s->x, yb = s->y;
203 unsigned char *row[4];
204
205 for (y = FFMAX(yb, 0); y < frame->height && y < (yb + s->h); y++) {
206 row[0] = frame->data[0] + y * frame->linesize[0];
207
208 for (plane = 1; plane < 3; plane++)
209 row[plane] = frame->data[plane] +
210 frame->linesize[plane] * (y >> s->vsub);
211
212 if (s->invert_color) {
213 for (x = FFMAX(xb, 0); x < xb + s->w && x < frame->width; x++)
214 if ((y - yb < s->thickness) || (yb + s->h - 1 - y < s->thickness) ||
215 (x - xb < s->thickness) || (xb + s->w - 1 - x < s->thickness))
216 row[0][x] = 0xff - row[0][x];
217 } else {
218 for (x = FFMAX(xb, 0); x < xb + s->w && x < frame->width; x++) {
219 double alpha = (double)s->yuv_color[A] / 255;
220
221 if ((y - yb < s->thickness) || (yb + s->h - 1 - y < s->thickness) ||
222 (x - xb < s->thickness) || (xb + s->w - 1 - x < s->thickness)) {
223 row[0][x ] = (1 - alpha) * row[0][x ] + alpha * s->yuv_color[Y];
224 row[1][x >> s->hsub] = (1 - alpha) * row[1][x >> s->hsub] + alpha * s->yuv_color[U];
225 row[2][x >> s->hsub] = (1 - alpha) * row[2][x >> s->hsub] + alpha * s->yuv_color[V];
226 }
227 }
228 }
229 }
230
231 return ff_filter_frame(inlink->dst->outputs[0], frame);
232}
233
234#define OFFSET(x) offsetof(DrawBoxContext, x)
235#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
236
237#if CONFIG_DRAWBOX_FILTER
238
239static const AVOption drawbox_options[] = {
240 { "x", "set horizontal position of the left box edge", OFFSET(x_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS },
241 { "y", "set vertical position of the top box edge", OFFSET(y_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS },
242 { "width", "set width of the box", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS },
243 { "w", "set width of the box", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS },
244 { "height", "set height of the box", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS },
245 { "h", "set height of the box", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS },
246 { "color", "set color of the box", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, CHAR_MIN, CHAR_MAX, FLAGS },
247 { "c", "set color of the box", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, CHAR_MIN, CHAR_MAX, FLAGS },
248 { "thickness", "set the box thickness", OFFSET(t_expr), AV_OPT_TYPE_STRING, { .str="3" }, CHAR_MIN, CHAR_MAX, FLAGS },
249 { "t", "set the box thickness", OFFSET(t_expr), AV_OPT_TYPE_STRING, { .str="3" }, CHAR_MIN, CHAR_MAX, FLAGS },
250 { NULL }
251};
252
253AVFILTER_DEFINE_CLASS(drawbox);
254
255static const AVFilterPad drawbox_inputs[] = {
256 {
257 .name = "default",
258 .type = AVMEDIA_TYPE_VIDEO,
259 .config_props = config_input,
260 .filter_frame = filter_frame,
261 .needs_writable = 1,
262 },
263 { NULL }
264};
265
266static const AVFilterPad drawbox_outputs[] = {
267 {
268 .name = "default",
269 .type = AVMEDIA_TYPE_VIDEO,
270 },
271 { NULL }
272};
273
274AVFilter ff_vf_drawbox = {
275 .name = "drawbox",
276 .description = NULL_IF_CONFIG_SMALL("Draw a colored box on the input video."),
277 .priv_size = sizeof(DrawBoxContext),
278 .priv_class = &drawbox_class,
279 .init = init,
280 .query_formats = query_formats,
281 .inputs = drawbox_inputs,
282 .outputs = drawbox_outputs,
283 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
284};
285#endif /* CONFIG_DRAWBOX_FILTER */
286
287#if CONFIG_DRAWGRID_FILTER
288static av_pure av_always_inline int pixel_belongs_to_grid(DrawBoxContext *drawgrid, int x, int y)
289{
290 // x is horizontal (width) coord,
291 // y is vertical (height) coord
292 int x_modulo;
293 int y_modulo;
294
295 // Abstract from the offset
296 x -= drawgrid->x;
297 y -= drawgrid->y;
298
299 x_modulo = x % drawgrid->w;
300 y_modulo = y % drawgrid->h;
301
302 // If x or y got negative, fix values to preserve logics
303 if (x_modulo < 0)
304 x_modulo += drawgrid->w;
305 if (y_modulo < 0)
306 y_modulo += drawgrid->h;
307
308 return x_modulo < drawgrid->thickness // Belongs to vertical line
309 || y_modulo < drawgrid->thickness; // Belongs to horizontal line
310}
311
312static int drawgrid_filter_frame(AVFilterLink *inlink, AVFrame *frame)
313{
314 DrawBoxContext *drawgrid = inlink->dst->priv;
315 int plane, x, y;
316 uint8_t *row[4];
317
318 for (y = 0; y < frame->height; y++) {
319 row[0] = frame->data[0] + y * frame->linesize[0];
320
321 for (plane = 1; plane < 3; plane++)
322 row[plane] = frame->data[plane] +
323 frame->linesize[plane] * (y >> drawgrid->vsub);
324
325 if (drawgrid->invert_color) {
326 for (x = 0; x < frame->width; x++)
327 if (pixel_belongs_to_grid(drawgrid, x, y))
328 row[0][x] = 0xff - row[0][x];
329 } else {
330 for (x = 0; x < frame->width; x++) {
331 double alpha = (double)drawgrid->yuv_color[A] / 255;
332
333 if (pixel_belongs_to_grid(drawgrid, x, y)) {
334 row[0][x ] = (1 - alpha) * row[0][x ] + alpha * drawgrid->yuv_color[Y];
335 row[1][x >> drawgrid->hsub] = (1 - alpha) * row[1][x >> drawgrid->hsub] + alpha * drawgrid->yuv_color[U];
336 row[2][x >> drawgrid->hsub] = (1 - alpha) * row[2][x >> drawgrid->hsub] + alpha * drawgrid->yuv_color[V];
337 }
338 }
339 }
340 }
341
342 return ff_filter_frame(inlink->dst->outputs[0], frame);
343}
344
345static const AVOption drawgrid_options[] = {
346 { "x", "set horizontal offset", OFFSET(x_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS },
347 { "y", "set vertical offset", OFFSET(y_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS },
348 { "width", "set width of grid cell", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS },
349 { "w", "set width of grid cell", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS },
350 { "height", "set height of grid cell", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS },
351 { "h", "set height of grid cell", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS },
352 { "color", "set color of the grid", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, CHAR_MIN, CHAR_MAX, FLAGS },
353 { "c", "set color of the grid", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, CHAR_MIN, CHAR_MAX, FLAGS },
354 { "thickness", "set grid line thickness", OFFSET(t_expr), AV_OPT_TYPE_STRING, {.str="1"}, CHAR_MIN, CHAR_MAX, FLAGS },
355 { "t", "set grid line thickness", OFFSET(t_expr), AV_OPT_TYPE_STRING, {.str="1"}, CHAR_MIN, CHAR_MAX, FLAGS },
356 { NULL }
357};
358
359AVFILTER_DEFINE_CLASS(drawgrid);
360
361static const AVFilterPad drawgrid_inputs[] = {
362 {
363 .name = "default",
364 .type = AVMEDIA_TYPE_VIDEO,
365 .config_props = config_input,
366 .filter_frame = drawgrid_filter_frame,
367 .needs_writable = 1,
368 },
369 { NULL }
370};
371
372static const AVFilterPad drawgrid_outputs[] = {
373 {
374 .name = "default",
375 .type = AVMEDIA_TYPE_VIDEO,
376 },
377 { NULL }
378};
379
380AVFilter ff_vf_drawgrid = {
381 .name = "drawgrid",
382 .description = NULL_IF_CONFIG_SMALL("Draw a colored grid on the input video."),
383 .priv_size = sizeof(DrawBoxContext),
384 .priv_class = &drawgrid_class,
385 .init = init,
386 .query_formats = query_formats,
387 .inputs = drawgrid_inputs,
388 .outputs = drawgrid_outputs,
389 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
390};
391
392#endif /* CONFIG_DRAWGRID_FILTER */
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