add static keyword to some functions
[libav.git] / vhook / imlib2.c
CommitLineData
26b4bb70 1/*
115329f1 2 * imlib2 based hook
26b4bb70 3 * Copyright (c) 2002 Philip Gladstone
115329f1 4 *
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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
115329f1 22 * in any way.
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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
115329f1 28 * image. However, this code is fast enough to handle 10 fps of 320x240 on a
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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
5509bffa 43 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26b4bb70 44 */
00a3c8b8
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45
46#include "framehook.h"
47
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48#include <stdio.h>
49#include <stdlib.h>
50#include <fcntl.h>
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51#include <stdarg.h>
52#include <string.h>
53#include <unistd.h>
00a3c8b8 54#undef time
26b4bb70 55#include <sys/time.h>
00a3c8b8 56#include <time.h>
26b4bb70 57#include <X11/Xlib.h>
115329f1 58#include <Imlib2.h>
26b4bb70 59
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60typedef struct {
61 int dummy;
62 Imlib_Font fn;
63 char *text;
64 char *file;
65 int r, g, b;
66 int x;
67 int y;
68 struct _CachedImage *cache;
69} ContextInfo;
70
71typedef struct _CachedImage {
72 struct _CachedImage *next;
73 Imlib_Image image;
74 int width;
75 int height;
76} CachedImage;
77
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78void Release(void *ctx)
79{
80 ContextInfo *ci;
81 ci = (ContextInfo *) ctx;
82
83 if (ci->cache) {
84 imlib_context_set_image(ci->cache->image);
85 imlib_free_image();
86 av_free(ci->cache);
87 }
88 if (ctx)
89 av_free(ctx);
90}
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91
92int Configure(void **ctxp, int argc, char *argv[])
93{
94 int c;
95 ContextInfo *ci;
96 char *font = "LucidaSansDemiBold/16";
97 char *fp = getenv("FONTPATH");
98 char *color = 0;
99 FILE *f;
100
101 *ctxp = av_mallocz(sizeof(ContextInfo));
102 ci = (ContextInfo *) *ctxp;
103
104 optind = 0;
105
106 if (fp)
107 imlib_add_path_to_font_path(fp);
108
109 while ((c = getopt(argc, argv, "c:f:F:t:x:y:")) > 0) {
110 switch (c) {
111 case 'c':
112 color = optarg;
113 break;
114 case 'F':
115 font = optarg;
116 break;
117 case 't':
e9a9e0c2 118 ci->text = av_strdup(optarg);
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119 break;
120 case 'f':
e9a9e0c2 121 ci->file = av_strdup(optarg);
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122 break;
123 case 'x':
124 ci->x = atoi(optarg);
125 break;
126 case 'y':
127 ci->y = atoi(optarg);
128 break;
129 case '?':
130 fprintf(stderr, "Unrecognized argument '%s'\n", argv[optind]);
131 return -1;
132 }
133 }
134
135 ci->fn = imlib_load_font(font);
136 if (!ci->fn) {
137 fprintf(stderr, "Failed to load font '%s'\n", font);
138 return -1;
139 }
140 imlib_context_set_font(ci->fn);
115329f1 141 imlib_context_set_direction(IMLIB_TEXT_TO_RIGHT);
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142
143 if (color) {
144 char buff[256];
145 int done = 0;
146
147 f = fopen("/usr/lib/X11/rgb.txt", "r");
148 if (!f) {
149 fprintf(stderr, "Failed to find rgb.txt\n");
150 return -1;
151 }
152 while (fgets(buff, sizeof(buff), f)) {
153 int r, g, b;
154 char colname[80];
155
156 if (sscanf(buff, "%d %d %d %64s", &r, &g, &b, colname) == 4 &&
157 strcasecmp(colname, color) == 0) {
158 ci->r = r;
159 ci->g = g;
160 ci->b = b;
161 /* fprintf(stderr, "%s -> %d,%d,%d\n", colname, r, g, b); */
162 done = 1;
163 break;
164 }
165 }
166 fclose(f);
167 if (!done) {
168 fprintf(stderr, "Unable to find color '%s' in rgb.txt\n", color);
169 return -1;
170 }
171 }
172 imlib_context_set_color(ci->r, ci->g, ci->b, 255);
173 return 0;
174}
175
176static Imlib_Image get_cached_image(ContextInfo *ci, int width, int height)
177{
178 CachedImage *cache;
179
180 for (cache = ci->cache; cache; cache = cache->next) {
181 if (width == cache->width && height == cache->height)
182 return cache->image;
183 }
184
185 return NULL;
186}
187
188static void put_cached_image(ContextInfo *ci, Imlib_Image image, int width, int height)
189{
190 CachedImage *cache = av_mallocz(sizeof(*cache));
191
192 cache->image = image;
193 cache->width = width;
194 cache->height = height;
195 cache->next = ci->cache;
196 ci->cache = cache;
197}
198
0c1a9eda 199void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, int64_t pts)
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200{
201 ContextInfo *ci = (ContextInfo *) ctx;
202 AVPicture picture1;
203 Imlib_Image image;
204 DATA32 *data;
205
206 image = get_cached_image(ci, width, height);
207
208 if (!image) {
209 image = imlib_create_image(width, height);
210 put_cached_image(ci, image, width, height);
211 }
212
213 imlib_context_set_image(image);
214 data = imlib_image_get_data();
215
0c1a9eda 216 avpicture_fill(&picture1, (uint8_t *) data, PIX_FMT_RGBA32, width, height);
bb4a8772 217 if (pix_fmt != PIX_FMT_RGBA32) {
115329f1 218 if (img_convert(&picture1, PIX_FMT_RGBA32,
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219 picture, pix_fmt, width, height) < 0) {
220 goto done;
221 }
222 } else {
115329f1 223 img_copy(&picture1, picture, PIX_FMT_RGBA32, width, height);
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224 }
225
226 imlib_image_set_has_alpha(0);
227
228 {
115329f1 229 int wid, hig, h_a, v_a;
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230 char buff[1000];
231 char tbuff[1000];
232 char *tbp = ci->text;
233 time_t now = time(0);
234 char *p, *q;
235 int x, y;
236
237 if (ci->file) {
238 int fd = open(ci->file, O_RDONLY);
239
240 if (fd < 0) {
241 tbp = "[File not found]";
242 } else {
243 int l = read(fd, tbuff, sizeof(tbuff) - 1);
244
245 if (l >= 0) {
246 tbuff[l] = 0;
247 tbp = tbuff;
248 } else {
249 tbp = "[I/O Error]";
250 }
251 close(fd);
252 }
253 }
254
4be3147d 255 strftime(buff, sizeof(buff), tbp ? tbp : "[No data]", localtime(&now));
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256
257 x = ci->x;
258 y = ci->y;
259
260 for (p = buff; p; p = q) {
261 q = strchr(p, '\n');
262 if (q)
263 *q++ = 0;
264
265 imlib_text_draw_with_return_metrics(x, y, p, &wid, &hig, &h_a, &v_a);
266 y += v_a;
267 }
268 }
269
0e5f8ab1 270 if (pix_fmt != PIX_FMT_RGBA32) {
115329f1 271 if (img_convert(picture, pix_fmt,
0e5f8ab1 272 &picture1, PIX_FMT_RGBA32, width, height) < 0) {
26b4bb70 273 }
bb4a8772 274 } else {
115329f1 275 img_copy(picture, &picture1, PIX_FMT_RGBA32, width, height);
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276 }
277
278done:
279 ;
280}
281