Merged revisions 46200 via svnmerge from
[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 #include "asterisk.h"
27
28 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
29
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33 #include <sys/time.h>
34 #include <sys/stat.h>
35 #include <signal.h>
36 #include <errno.h>
37 #include <unistd.h>
38
39 #include "asterisk/sched.h"
40 #include "asterisk/options.h"
41 #include "asterisk/channel.h"
42 #include "asterisk/logger.h"
43 #include "asterisk/file.h"
44 #include "asterisk/image.h"
45 #include "asterisk/translate.h"
46 #include "asterisk/cli.h"
47 #include "asterisk/lock.h"
48
49 /* XXX Why don't we just use the formats struct for this? */
50 static AST_LIST_HEAD_STATIC(imagers, ast_imager);
51
52 int ast_image_register(struct ast_imager *img)
53 {
54         if (option_verbose > 1)
55                 ast_verbose(VERBOSE_PREFIX_2 "Registered format '%s' (%s)\n", img->name, img->desc);
56         AST_LIST_LOCK(&imagers);
57         AST_LIST_INSERT_HEAD(&imagers, img, list);
58         AST_LIST_UNLOCK(&imagers);
59         return 0;
60 }
61
62 void ast_image_unregister(struct ast_imager *img)
63 {
64         struct ast_imager *i;
65         
66         AST_LIST_LOCK(&imagers);
67         AST_LIST_TRAVERSE_SAFE_BEGIN(&imagers, i, list) {       
68                 if (i == img) {
69                         AST_LIST_REMOVE_CURRENT(&imagers, list);
70                         break;
71                 }
72         }
73         AST_LIST_TRAVERSE_SAFE_END
74         AST_LIST_UNLOCK(&imagers);
75         if (i && (option_verbose > 1))
76                 ast_verbose(VERBOSE_PREFIX_2 "Unregistered format '%s' (%s)\n", img->name, img->desc);
77 }
78
79 int ast_supports_images(struct ast_channel *chan)
80 {
81         if (!chan || !chan->tech)
82                 return 0;
83         if (!chan->tech->send_image)
84                 return 0;
85         return 1;
86 }
87
88 static int file_exists(char *filename)
89 {
90         int res;
91         struct stat st;
92         res = stat(filename, &st);
93         if (!res)
94                 return st.st_size;
95         return 0;
96 }
97
98 static void make_filename(char *buf, int len, char *filename, const char *preflang, char *ext)
99 {
100         if (filename[0] == '/') {
101                 if (!ast_strlen_zero(preflang))
102                         snprintf(buf, len, "%s-%s.%s", filename, preflang, ext);
103                 else
104                         snprintf(buf, len, "%s.%s", filename, ext);
105         } else {
106                 if (!ast_strlen_zero(preflang))
107                         snprintf(buf, len, "%s/%s/%s-%s.%s", ast_config_AST_DATA_DIR, "images", filename, preflang, ext);
108                 else
109                         snprintf(buf, len, "%s/%s/%s.%s", ast_config_AST_DATA_DIR, "images", filename, ext);
110         }
111 }
112
113 struct ast_frame *ast_read_image(char *filename, const char *preflang, int format)
114 {
115         struct ast_imager *i;
116         char buf[256];
117         char tmp[80];
118         char *e;
119         struct ast_imager *found = NULL;
120         int fd;
121         int len=0;
122         struct ast_frame *f = NULL;
123         
124         AST_LIST_LOCK(&imagers);
125         AST_LIST_TRAVERSE(&imagers, i, list) {
126                 if (i->format & format) {
127                         char *stringp=NULL;
128                         ast_copy_string(tmp, i->exts, sizeof(tmp));
129                         stringp=tmp;
130                         e = strsep(&stringp, "|");
131                         while(e) {
132                                 make_filename(buf, sizeof(buf), filename, preflang, e);
133                                 if ((len = file_exists(buf))) {
134                                         found = i;
135                                         break;
136                                 }
137                                 make_filename(buf, sizeof(buf), filename, NULL, e);
138                                 if ((len = file_exists(buf))) {
139                                         found = i;
140                                         break;
141                                 }
142                                 e = strsep(&stringp, "|");
143                         }
144                 }
145                 if (found)
146                         break;  
147         }
148
149         if (found) {
150                 fd = open(buf, O_RDONLY);
151                 if (fd > -1) {
152                         if (!found->identify || found->identify(fd)) {
153                                 /* Reset file pointer */
154                                 lseek(fd, 0, SEEK_SET);
155                                 f = found->read_image(fd,len); 
156                         } else
157                                 ast_log(LOG_WARNING, "%s does not appear to be a %s file\n", buf, found->name);
158                         close(fd);
159                 } else
160                         ast_log(LOG_WARNING, "Unable to open '%s': %s\n", buf, strerror(errno));
161         } else
162                 ast_log(LOG_WARNING, "Image file '%s' not found\n", filename);
163         
164         AST_LIST_UNLOCK(&imagers);
165         
166         return f;
167 }
168
169 int ast_send_image(struct ast_channel *chan, char *filename)
170 {
171         struct ast_frame *f;
172         int res = -1;
173         if (chan->tech->send_image) {
174                 f = ast_read_image(filename, chan->language, -1);
175                 if (f) {
176                         res = chan->tech->send_image(chan, f);
177                         ast_frfree(f);
178                 }
179         }
180         return res;
181 }
182
183 static int show_image_formats(int fd, int argc, char *argv[])
184 {
185 #define FORMAT "%10s %10s %50s %10s\n"
186 #define FORMAT2 "%10s %10s %50s %10s\n"
187         struct ast_imager *i;
188         if (argc != 4)
189                 return RESULT_SHOWUSAGE;
190         ast_cli(fd, FORMAT, "Name", "Extensions", "Description", "Format");
191         AST_LIST_TRAVERSE(&imagers, i, list)
192                 ast_cli(fd, FORMAT2, i->name, i->exts, i->desc, ast_getformatname(i->format));
193         return RESULT_SUCCESS;
194 }
195
196 struct ast_cli_entry cli_image[] = {
197         { { "file", "list", "formats", "image" },
198         show_image_formats, "Displays image formats",
199         "Usage: file list formats image\n"
200         "       displays currently registered image formats (if any)\n" },
201 };
202
203 int ast_image_init(void)
204 {
205         ast_cli_register_multiple(cli_image, sizeof(cli_image) / sizeof(struct ast_cli_entry));
206         return 0;
207 }