CI: Various updates to buildAsterisk.sh
[asterisk/asterisk.git] / main / image.c
1 /*
2  * Asterisk -- An open source telephony toolkit.
3  *
4  * Copyright (C) 1999 - 2006, Digium, Inc.
5  *
6  * Mark Spencer <markster@digium.com>
7  *
8  * See http://www.asterisk.org for more information about
9  * the Asterisk project. Please do not directly contact
10  * any of the maintainers of this project for assistance;
11  * the project provides a web site, mailing lists and IRC
12  * channels for your use.
13  *
14  * This program is free software, distributed under the terms of
15  * the GNU General Public License Version 2. See the LICENSE file
16  * at the top of the source tree.
17  */
18
19 /*! \file
20  *
21  * \brief Image Management
22  *
23  * \author Mark Spencer <markster@digium.com>
24  */
25
26 /*** MODULEINFO
27         <support_level>core</support_level>
28  ***/
29
30 #include "asterisk.h"
31
32 #include <sys/time.h>
33 #include <sys/stat.h>
34 #include <signal.h>
35
36 #include "asterisk/paths.h"     /* use ast_config_AST_DATA_DIR */
37 #include "asterisk/sched.h"
38 #include "asterisk/channel.h"
39 #include "asterisk/file.h"
40 #include "asterisk/image.h"
41 #include "asterisk/translate.h"
42 #include "asterisk/cli.h"
43 #include "asterisk/lock.h"
44
45 /* XXX Why don't we just use the formats struct for this? */
46 static AST_RWLIST_HEAD_STATIC(imagers, ast_imager);
47
48 int ast_image_register(struct ast_imager *img)
49 {
50         AST_RWLIST_WRLOCK(&imagers);
51         AST_RWLIST_INSERT_HEAD(&imagers, img, list);
52         AST_RWLIST_UNLOCK(&imagers);
53         ast_verb(2, "Registered format '%s' (%s)\n", img->name, img->desc);
54         return 0;
55 }
56
57 void ast_image_unregister(struct ast_imager *img)
58 {
59         AST_RWLIST_WRLOCK(&imagers);
60         img = AST_RWLIST_REMOVE(&imagers, img, list);
61         AST_RWLIST_UNLOCK(&imagers);
62
63         if (img)
64                 ast_verb(2, "Unregistered format '%s' (%s)\n", img->name, img->desc);
65 }
66
67 int ast_supports_images(struct ast_channel *chan)
68 {
69         if (!chan || !ast_channel_tech(chan))
70                 return 0;
71         if (!ast_channel_tech(chan)->send_image)
72                 return 0;
73         return 1;
74 }
75
76 static int file_exists(char *filename)
77 {
78         int res;
79         struct stat st;
80         res = stat(filename, &st);
81         if (!res)
82                 return st.st_size;
83         return 0;
84 }
85
86 static void make_filename(char *buf, int len, const char *filename, const char *preflang, char *ext)
87 {
88         if (filename[0] == '/') {
89                 if (!ast_strlen_zero(preflang))
90                         snprintf(buf, len, "%s-%s.%s", filename, preflang, ext);
91                 else
92                         snprintf(buf, len, "%s.%s", filename, ext);
93         } else {
94                 if (!ast_strlen_zero(preflang))
95                         snprintf(buf, len, "%s/%s/%s-%s.%s", ast_config_AST_DATA_DIR, "images", filename, preflang, ext);
96                 else
97                         snprintf(buf, len, "%s/%s/%s.%s", ast_config_AST_DATA_DIR, "images", filename, ext);
98         }
99 }
100
101 struct ast_frame *ast_read_image(const char *filename, const char *preflang, struct ast_format *format)
102 {
103         struct ast_imager *i;
104         char buf[256];
105         char tmp[80];
106         char *e;
107         struct ast_imager *found = NULL;
108         int fd;
109         int len=0;
110         struct ast_frame *f = NULL;
111
112         AST_RWLIST_RDLOCK(&imagers);
113         AST_RWLIST_TRAVERSE(&imagers, i, list) {
114                 /* if NULL image format, just pick the first one, otherwise match it. */
115                 if (!format || (ast_format_cmp(i->format, format) == AST_FORMAT_CMP_EQUAL)) {
116                         char *stringp=NULL;
117                         ast_copy_string(tmp, i->exts, sizeof(tmp));
118                         stringp = tmp;
119                         e = strsep(&stringp, "|");
120                         while (e) {
121                                 make_filename(buf, sizeof(buf), filename, preflang, e);
122                                 if ((len = file_exists(buf))) {
123                                         found = i;
124                                         break;
125                                 }
126                                 make_filename(buf, sizeof(buf), filename, NULL, e);
127                                 if ((len = file_exists(buf))) {
128                                         found = i;
129                                         break;
130                                 }
131                                 e = strsep(&stringp, "|");
132                         }
133                 }
134                 if (found)
135                         break;
136         }
137
138         if (found) {
139                 fd = open(buf, O_RDONLY);
140                 if (fd > -1) {
141                         if (!found->identify || found->identify(fd)) {
142                                 /* Reset file pointer */
143                                 lseek(fd, 0, SEEK_SET);
144                                 f = found->read_image(fd, len);
145                         } else
146                                 ast_log(LOG_WARNING, "%s does not appear to be a %s file\n", buf, found->name);
147                         close(fd);
148                 } else
149                         ast_log(LOG_WARNING, "Unable to open '%s': %s\n", buf, strerror(errno));
150         } else
151                 ast_log(LOG_WARNING, "Image file '%s' not found\n", filename);
152
153         AST_RWLIST_UNLOCK(&imagers);
154
155         return f;
156 }
157
158 int ast_send_image(struct ast_channel *chan, const char *filename)
159 {
160         struct ast_frame *f;
161         int res = -1;
162         if (ast_channel_tech(chan)->send_image) {
163                 f = ast_read_image(filename, ast_channel_language(chan), NULL);
164                 if (f) {
165                         res = ast_channel_tech(chan)->send_image(chan, f);
166                         ast_frfree(f);
167                 }
168         }
169         return res;
170 }
171
172 static char *handle_core_show_image_formats(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
173 {
174 #define FORMAT "%10s %10s %50s %10s\n"
175 #define FORMAT2 "%10s %10s %50s %10s\n"
176         struct ast_imager *i;
177         int count_fmt = 0;
178
179         switch (cmd) {
180         case CLI_INIT:
181                 e->command = "core show image formats";
182                 e->usage =
183                         "Usage: core show image formats\n"
184                         "       Displays currently registered image formats (if any).\n";
185                 return NULL;
186         case CLI_GENERATE:
187                 return NULL;
188         }
189         if (a->argc != 4)
190                 return CLI_SHOWUSAGE;
191         ast_cli(a->fd, FORMAT, "Name", "Extensions", "Description", "Format");
192         ast_cli(a->fd, FORMAT, "----", "----------", "-----------", "------");
193         AST_RWLIST_RDLOCK(&imagers);
194         AST_RWLIST_TRAVERSE(&imagers, i, list) {
195                 ast_cli(a->fd, FORMAT2, i->name, i->exts, i->desc, ast_format_get_name(i->format));
196                 count_fmt++;
197         }
198         AST_RWLIST_UNLOCK(&imagers);
199         ast_cli(a->fd, "\n%d image format%s registered.\n", count_fmt, count_fmt == 1 ? "" : "s");
200         return CLI_SUCCESS;
201 }
202
203 static struct ast_cli_entry cli_image[] = {
204         AST_CLI_DEFINE(handle_core_show_image_formats, "Displays image formats")
205 };
206
207 static void image_shutdown(void)
208 {
209         ast_cli_unregister_multiple(cli_image, ARRAY_LEN(cli_image));
210 }
211
212 int ast_image_init(void)
213 {
214         ast_cli_register_multiple(cli_image, ARRAY_LEN(cli_image));
215         ast_register_cleanup(image_shutdown);
216         return 0;
217 }