3 * Copyright (c) 2002 Philip Gladstone
5 * This module implements a text overlay for a video image. Currently it
6 * supports a fixed overlay or reading the text from a file. The string
7 * is passed through strftime so that it is easy to imprint the date and
12 * -c <color> The color of the text
13 * -F <fontname> The font face and size
15 * -f <filename> The filename to read text from
16 * -x <num> X coordinate to start text
17 * -y <num> Y coordinate to start text
19 * This module is very much intended as an example of what could be done.
20 * For example, you could overlay an image (even semi-transparent) like
21 * TV stations do. You can manipulate the image using imlib2 functions
24 * One caution is that this is an expensive process -- in particular the
25 * conversion of the image into RGB and back is time consuming. For some
26 * special cases -- e.g. painting black text -- it would be faster to paint
27 * the text into a bitmap and then combine it directly into the YUV
28 * image. However, this code is fast enough to handle 10 fps of 320x240 on a
29 * 900MHz Duron in maybe 15% of the CPU.
31 * This library is free software; you can redistribute it and/or
32 * modify it under the terms of the GNU Lesser General Public
33 * License as published by the Free Software Foundation; either
34 * version 2 of the License, or (at your option) any later version.
36 * This library is distributed in the hope that it will be useful,
37 * but WITHOUT ANY WARRANTY; without even the implied warranty of
38 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
39 * Lesser General Public License for more details.
41 * You should have received a copy of the GNU Lesser General Public
42 * License along with this library; if not, write to the Free Software
43 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
46 #include "framehook.h"
68 struct _CachedImage *cache;
71 typedef struct _CachedImage {
72 struct _CachedImage *next;
78 void Release(void *ctx)
81 ci = (ContextInfo *) ctx;
84 imlib_context_set_image(ci->cache->image);
92 int Configure(void **ctxp, int argc, char *argv[])
96 char *font = "LucidaSansDemiBold/16";
97 char *fp = getenv("FONTPATH");
101 *ctxp = av_mallocz(sizeof(ContextInfo));
102 ci = (ContextInfo *) *ctxp;
107 imlib_add_path_to_font_path(fp);
109 while ((c = getopt(argc, argv, "c:f:F:t:x:y:")) > 0) {
118 ci->text = av_strdup(optarg);
121 ci->file = av_strdup(optarg);
124 ci->x = atoi(optarg);
127 ci->y = atoi(optarg);
130 fprintf(stderr, "Unrecognized argument '%s'\n", argv[optind]);
135 ci->fn = imlib_load_font(font);
137 fprintf(stderr, "Failed to load font '%s'\n", font);
140 imlib_context_set_font(ci->fn);
141 imlib_context_set_direction(IMLIB_TEXT_TO_RIGHT);
147 f = fopen("/usr/share/X11/rgb.txt", "r");
149 f = fopen("/usr/lib/X11/rgb.txt", "r");
151 fprintf(stderr, "Failed to find rgb.txt\n");
154 while (fgets(buff, sizeof(buff), f)) {
158 if (sscanf(buff, "%d %d %d %64s", &r, &g, &b, colname) == 4 &&
159 strcasecmp(colname, color) == 0) {
163 /* fprintf(stderr, "%s -> %d,%d,%d\n", colname, r, g, b); */
170 fprintf(stderr, "Unable to find color '%s' in rgb.txt\n", color);
174 imlib_context_set_color(ci->r, ci->g, ci->b, 255);
178 static Imlib_Image get_cached_image(ContextInfo *ci, int width, int height)
182 for (cache = ci->cache; cache; cache = cache->next) {
183 if (width == cache->width && height == cache->height)
190 static void put_cached_image(ContextInfo *ci, Imlib_Image image, int width, int height)
192 CachedImage *cache = av_mallocz(sizeof(*cache));
194 cache->image = image;
195 cache->width = width;
196 cache->height = height;
197 cache->next = ci->cache;
201 void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, int64_t pts)
203 ContextInfo *ci = (ContextInfo *) ctx;
208 image = get_cached_image(ci, width, height);
211 image = imlib_create_image(width, height);
212 put_cached_image(ci, image, width, height);
215 imlib_context_set_image(image);
216 data = imlib_image_get_data();
218 avpicture_fill(&picture1, (uint8_t *) data, PIX_FMT_RGBA32, width, height);
219 if (pix_fmt != PIX_FMT_RGBA32) {
220 if (img_convert(&picture1, PIX_FMT_RGBA32,
221 picture, pix_fmt, width, height) < 0) {
225 img_copy(&picture1, picture, PIX_FMT_RGBA32, width, height);
228 imlib_image_set_has_alpha(0);
231 int wid, hig, h_a, v_a;
234 char *tbp = ci->text;
235 time_t now = time(0);
240 int fd = open(ci->file, O_RDONLY);
243 tbp = "[File not found]";
245 int l = read(fd, tbuff, sizeof(tbuff) - 1);
257 strftime(buff, sizeof(buff), tbp ? tbp : "[No data]", localtime(&now));
262 for (p = buff; p; p = q) {
267 imlib_text_draw_with_return_metrics(x, y, p, &wid, &hig, &h_a, &v_a);
272 if (pix_fmt != PIX_FMT_RGBA32) {
273 if (img_convert(picture, pix_fmt,
274 &picture1, PIX_FMT_RGBA32, width, height) < 0) {
277 img_copy(picture, &picture1, PIX_FMT_RGBA32, width, height);