Applied changes to make it compile on darwin
[libav.git] / vhook / imlib2.c
1 /*
2 * imlib2 based hook
3 * Copyright (c) 2002 Philip Gladstone
4 *
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
8 * time onto the image.
9 *
10 * Options:
11 *
12 * -c <color> The color of the text
13 * -F <fontname> The font face and size
14 * -t <text> The text
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
18 *
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
22 * in any way.
23 *
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.
30 *
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.
35 *
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.
40 *
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
44 */
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <fcntl.h>
48 #include <stdarg.h>
49 #include <string.h>
50 #include <unistd.h>
51 #include <sys/time.h>
52 #include <X11/Xlib.h>
53 #include <Imlib2.h>
54
55 #include "framehook.h"
56
57 typedef struct {
58 int dummy;
59 Imlib_Font fn;
60 char *text;
61 char *file;
62 int r, g, b;
63 int x;
64 int y;
65 struct _CachedImage *cache;
66 } ContextInfo;
67
68 typedef struct _CachedImage {
69 struct _CachedImage *next;
70 Imlib_Image image;
71 int width;
72 int height;
73 } CachedImage;
74
75
76 int Configure(void **ctxp, int argc, char *argv[])
77 {
78 int c;
79 ContextInfo *ci;
80 char *font = "LucidaSansDemiBold/16";
81 char *fp = getenv("FONTPATH");
82 char *color = 0;
83 FILE *f;
84
85 *ctxp = av_mallocz(sizeof(ContextInfo));
86 ci = (ContextInfo *) *ctxp;
87
88 optind = 0;
89
90 if (fp)
91 imlib_add_path_to_font_path(fp);
92
93 while ((c = getopt(argc, argv, "c:f:F:t:x:y:")) > 0) {
94 switch (c) {
95 case 'c':
96 color = optarg;
97 break;
98 case 'F':
99 font = optarg;
100 break;
101 case 't':
102 ci->text = strdup(optarg);
103 break;
104 case 'f':
105 ci->file = strdup(optarg);
106 break;
107 case 'x':
108 ci->x = atoi(optarg);
109 break;
110 case 'y':
111 ci->y = atoi(optarg);
112 break;
113 case '?':
114 fprintf(stderr, "Unrecognized argument '%s'\n", argv[optind]);
115 return -1;
116 }
117 }
118
119 ci->fn = imlib_load_font(font);
120 if (!ci->fn) {
121 fprintf(stderr, "Failed to load font '%s'\n", font);
122 return -1;
123 }
124 imlib_context_set_font(ci->fn);
125 imlib_context_set_direction(IMLIB_TEXT_TO_RIGHT);
126
127 if (color) {
128 char buff[256];
129 int done = 0;
130
131 f = fopen("/usr/lib/X11/rgb.txt", "r");
132 if (!f) {
133 fprintf(stderr, "Failed to find rgb.txt\n");
134 return -1;
135 }
136 while (fgets(buff, sizeof(buff), f)) {
137 int r, g, b;
138 char colname[80];
139
140 if (sscanf(buff, "%d %d %d %64s", &r, &g, &b, colname) == 4 &&
141 strcasecmp(colname, color) == 0) {
142 ci->r = r;
143 ci->g = g;
144 ci->b = b;
145 /* fprintf(stderr, "%s -> %d,%d,%d\n", colname, r, g, b); */
146 done = 1;
147 break;
148 }
149 }
150 fclose(f);
151 if (!done) {
152 fprintf(stderr, "Unable to find color '%s' in rgb.txt\n", color);
153 return -1;
154 }
155 }
156 imlib_context_set_color(ci->r, ci->g, ci->b, 255);
157 return 0;
158 }
159
160 static Imlib_Image get_cached_image(ContextInfo *ci, int width, int height)
161 {
162 CachedImage *cache;
163
164 for (cache = ci->cache; cache; cache = cache->next) {
165 if (width == cache->width && height == cache->height)
166 return cache->image;
167 }
168
169 return NULL;
170 }
171
172 static void put_cached_image(ContextInfo *ci, Imlib_Image image, int width, int height)
173 {
174 CachedImage *cache = av_mallocz(sizeof(*cache));
175
176 cache->image = image;
177 cache->width = width;
178 cache->height = height;
179 cache->next = ci->cache;
180 ci->cache = cache;
181 }
182
183 void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, INT64 pts)
184 {
185 ContextInfo *ci = (ContextInfo *) ctx;
186 AVPicture picture1;
187 Imlib_Image image;
188 DATA32 *data;
189
190 image = get_cached_image(ci, width, height);
191
192 if (!image) {
193 image = imlib_create_image(width, height);
194 put_cached_image(ci, image, width, height);
195 }
196
197 imlib_context_set_image(image);
198 data = imlib_image_get_data();
199
200 if (pix_fmt != PIX_FMT_BGRA32) {
201 avpicture_fill(&picture1, (UINT8 *) data, PIX_FMT_BGRA32, width, height);
202 if (img_convert(&picture1, PIX_FMT_BGRA32,
203 picture, pix_fmt, width, height) < 0) {
204 goto done;
205 }
206 } else {
207 av_abort();
208 }
209
210 imlib_image_set_has_alpha(0);
211
212 {
213 int wid, hig, h_a, v_a;
214 char buff[1000];
215 char tbuff[1000];
216 char *tbp = ci->text;
217 time_t now = time(0);
218 char *p, *q;
219 int x, y;
220
221 if (ci->file) {
222 int fd = open(ci->file, O_RDONLY);
223
224 if (fd < 0) {
225 tbp = "[File not found]";
226 } else {
227 int l = read(fd, tbuff, sizeof(tbuff) - 1);
228
229 if (l >= 0) {
230 tbuff[l] = 0;
231 tbp = tbuff;
232 } else {
233 tbp = "[I/O Error]";
234 }
235 close(fd);
236 }
237 }
238
239 strftime(buff, sizeof(buff), tbp, localtime(&now));
240
241 x = ci->x;
242 y = ci->y;
243
244 for (p = buff; p; p = q) {
245 q = strchr(p, '\n');
246 if (q)
247 *q++ = 0;
248
249 imlib_text_draw_with_return_metrics(x, y, p, &wid, &hig, &h_a, &v_a);
250 y += v_a;
251 }
252 }
253
254 if (pix_fmt != PIX_FMT_BGRA32) {
255 if (img_convert(picture, pix_fmt,
256 &picture1, PIX_FMT_BGRA32, width, height) < 0) {
257 }
258 }
259
260 done:
261 ;
262 }
263
264 /* To ensure correct typing */
265 FrameHookConfigureFn ConfigureFn = Configure;
266 FrameHookProcessFn ProcessFn = Process;