2 * Copyright (c) 2015 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
23 #include "libavutil/eval.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/opt.h"
31 typedef struct DrawGraphContext {
49 #define OFFSET(x) offsetof(DrawGraphContext, x)
50 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
52 static const AVOption drawgraph_options[] = {
53 { "m1", "set 1st metadata key", OFFSET(key[0]), AV_OPT_TYPE_STRING, {.str=""}, CHAR_MIN, CHAR_MAX, FLAGS },
54 { "fg1", "set 1st foreground color expression", OFFSET(fg_str[0]), AV_OPT_TYPE_STRING, {.str="0xff0000"}, CHAR_MIN, CHAR_MAX, FLAGS },
55 { "m2", "set 2nd metadata key", OFFSET(key[1]), AV_OPT_TYPE_STRING, {.str=""}, CHAR_MIN, CHAR_MAX, FLAGS },
56 { "fg2", "set 2nd foreground color expression", OFFSET(fg_str[1]), AV_OPT_TYPE_STRING, {.str="0x00ff00"}, CHAR_MIN, CHAR_MAX, FLAGS },
57 { "m3", "set 3rd metadata key", OFFSET(key[2]), AV_OPT_TYPE_STRING, {.str=""}, CHAR_MIN, CHAR_MAX, FLAGS },
58 { "fg3", "set 3rd foreground color expression", OFFSET(fg_str[2]), AV_OPT_TYPE_STRING, {.str="0xff00ff"}, CHAR_MIN, CHAR_MAX, FLAGS },
59 { "m4", "set 4th metadata key", OFFSET(key[3]), AV_OPT_TYPE_STRING, {.str=""}, CHAR_MIN, CHAR_MAX, FLAGS },
60 { "fg4", "set 4th foreground color expression", OFFSET(fg_str[3]), AV_OPT_TYPE_STRING, {.str="0xffff00"}, CHAR_MIN, CHAR_MAX, FLAGS },
61 { "bg", "set background color", OFFSET(bg), AV_OPT_TYPE_COLOR, {.str="white"}, CHAR_MIN, CHAR_MAX, FLAGS },
62 { "min", "set minimal value", OFFSET(min), AV_OPT_TYPE_FLOAT, {.dbl=-1.}, INT_MIN, INT_MAX, FLAGS },
63 { "max", "set maximal value", OFFSET(max), AV_OPT_TYPE_FLOAT, {.dbl=1.}, INT_MIN, INT_MAX, FLAGS },
64 { "mode", "set graph mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=2}, 0, 2, FLAGS, "mode" },
65 {"bar", "draw bars", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "mode"},
66 {"dot", "draw dots", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "mode"},
67 {"line", "draw lines", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "mode"},
68 { "slide", "set slide mode", OFFSET(slide), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, FLAGS, "slide" },
69 {"frame", "draw new frames", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "slide"},
70 {"replace", "replace old columns with new", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "slide"},
71 {"scroll", "scroll from right to left", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "slide"},
72 { "size", "set graph size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="900x256"}, 0, 0, FLAGS },
73 { "s", "set graph size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="900x256"}, 0, 0, FLAGS },
77 static const char *const var_names[] = { "MAX", "MIN", "VAL", NULL };
78 enum { VAR_MAX, VAR_MIN, VAR_VAL, VAR_VARS_NB };
80 static av_cold int init(AVFilterContext *ctx)
82 DrawGraphContext *s = ctx->priv;
85 if (s->max <= s->min) {
86 av_log(ctx, AV_LOG_ERROR, "max is same or lower than min\n");
87 return AVERROR(EINVAL);
90 for (i = 0; i < 4; i++) {
92 ret = av_expr_parse(&s->fg_expr[i], s->fg_str[i], var_names,
93 NULL, NULL, NULL, NULL, 0, ctx);
105 static int query_formats(AVFilterContext *ctx)
107 AVFilterLink *outlink = ctx->outputs[0];
108 static const enum AVPixelFormat pix_fmts[] = {
113 AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
115 return AVERROR(ENOMEM);
116 ff_formats_ref(fmts_list, &outlink->in_formats);
121 static void clear_image(DrawGraphContext *s, AVFrame *out, AVFilterLink *outlink)
124 int bg = AV_RN32(s->bg);
126 for (i = 0; i < out->height; i++)
127 for (j = 0; j < out->width; j++)
128 AV_WN32(out->data[0] + i * out->linesize[0] + j * 4, bg);
131 static inline void draw_dot(int fg, int x, int y, AVFrame *out)
133 AV_WN32(out->data[0] + y * out->linesize[0] + x * 4, fg);
136 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
138 AVFilterContext *ctx = inlink->dst;
139 DrawGraphContext *s = ctx->priv;
140 AVFilterLink *outlink = ctx->outputs[0];
141 AVDictionary *metadata;
142 AVDictionaryEntry *e;
143 AVFrame *out = s->out;
146 if (!s->out || s->out->width != outlink->w ||
147 s->out->height != outlink->h) {
148 av_frame_free(&s->out);
149 s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
153 return AVERROR(ENOMEM);
156 clear_image(s, out, outlink);
158 av_frame_copy_props(out, in);
160 metadata = av_frame_get_metadata(in);
162 for (i = 0; i < 4; i++) {
163 double values[VAR_VARS_NB];
164 int j, y, x, fg, bg, old;
167 e = av_dict_get(metadata, s->key[i], NULL, 0);
171 if (sscanf(e->value, "%f", &vf) != 1)
174 vf = av_clipf(vf, s->min, s->max);
176 values[VAR_MIN] = s->min;
177 values[VAR_MAX] = s->max;
178 values[VAR_VAL] = vf;
180 fg = av_expr_eval(s->fg_expr[i], values, NULL);
183 if (i == 0 && s->x >= outlink->w) {
184 if (s->slide == 0 || s->slide == 1)
188 s->x = outlink->w - 1;
189 for (j = 0; j < outlink->h; j++) {
190 memmove(out->data[0] + j * out->linesize[0] ,
191 out->data[0] + j * out->linesize[0] + 4,
192 (outlink->w - 1) * 4);
194 } else if (s->slide == 0) {
195 clear_image(s, out, outlink);
200 y = (outlink->h - 1) * (1 - ((vf - s->min) / (s->max - s->min)));
204 if (i == 0 && (s->slide == 1 || s->slide == 2))
205 for (j = 0; j < outlink->h; j++)
206 draw_dot(bg, x, j, out);
208 old = AV_RN32(out->data[0] + y * out->linesize[0] + x * 4);
209 for (j = y; j < outlink->h; j++) {
211 (AV_RN32(out->data[0] + j * out->linesize[0] + x * 4) != old) ||
212 AV_RN32(out->data[0] + FFMIN(j+1, outlink->h - 1) * out->linesize[0] + x * 4) != old) {
213 draw_dot(fg, x, j, out);
216 draw_dot(fg, x, j, out);
220 if (i == 0 && (s->slide == 1 || s->slide == 2))
221 for (j = 0; j < outlink->h; j++)
222 draw_dot(bg, x, j, out);
223 draw_dot(fg, x, y, out);
231 if (i == 0 && (s->slide == 1 || s->slide == 2)) {
232 for (j = 0; j < y; j++)
233 draw_dot(bg, x, j, out);
234 for (j = outlink->h - 1; j > y; j--)
235 draw_dot(bg, x, j, out);
237 if (y <= s->prev_y[i]) {
238 for (j = y; j <= s->prev_y[i]; j++)
239 draw_dot(fg, x, j, out);
241 for (j = s->prev_y[i]; j <= y; j++)
242 draw_dot(fg, x, j, out);
252 return ff_filter_frame(outlink, av_frame_clone(s->out));
255 static int config_output(AVFilterLink *outlink)
257 DrawGraphContext *s = outlink->src->priv;
261 outlink->sample_aspect_ratio = (AVRational){1,1};
266 static av_cold void uninit(AVFilterContext *ctx)
268 DrawGraphContext *s = ctx->priv;
271 for (i = 0; i < 4; i++)
272 av_expr_free(s->fg_expr[i]);
273 av_frame_free(&s->out);
276 #if CONFIG_DRAWGRAPH_FILTER
278 AVFILTER_DEFINE_CLASS(drawgraph);
280 static const AVFilterPad drawgraph_inputs[] = {
283 .type = AVMEDIA_TYPE_VIDEO,
284 .filter_frame = filter_frame,
289 static const AVFilterPad drawgraph_outputs[] = {
292 .type = AVMEDIA_TYPE_VIDEO,
293 .config_props = config_output,
298 AVFilter ff_vf_drawgraph = {
300 .description = NULL_IF_CONFIG_SMALL("Draw a graph using input video metadata."),
301 .priv_size = sizeof(DrawGraphContext),
302 .priv_class = &drawgraph_class,
303 .query_formats = query_formats,
306 .inputs = drawgraph_inputs,
307 .outputs = drawgraph_outputs,
310 #endif // CONFIG_DRAWGRAPH_FILTER
312 #if CONFIG_ADRAWGRAPH_FILTER
314 #define adrawgraph_options drawgraph_options
315 AVFILTER_DEFINE_CLASS(adrawgraph);
317 static const AVFilterPad adrawgraph_inputs[] = {
320 .type = AVMEDIA_TYPE_AUDIO,
321 .filter_frame = filter_frame,
326 static const AVFilterPad adrawgraph_outputs[] = {
329 .type = AVMEDIA_TYPE_VIDEO,
330 .config_props = config_output,
335 AVFilter ff_avf_adrawgraph = {
336 .name = "adrawgraph",
337 .description = NULL_IF_CONFIG_SMALL("Draw a graph using input audio metadata."),
338 .priv_size = sizeof(DrawGraphContext),
339 .priv_class = &adrawgraph_class,
340 .query_formats = query_formats,
343 .inputs = adrawgraph_inputs,
344 .outputs = adrawgraph_outputs,
346 #endif // CONFIG_ADRAWGRAPH_FILTER