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00026 #include "asterisk.h"
00027
00028 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 47051 $")
00029
00030 #include <stdio.h>
00031 #include <stdlib.h>
00032 #include <string.h>
00033 #include <sys/time.h>
00034 #include <sys/stat.h>
00035 #include <signal.h>
00036 #include <errno.h>
00037 #include <unistd.h>
00038
00039 #include "asterisk/sched.h"
00040 #include "asterisk/options.h"
00041 #include "asterisk/channel.h"
00042 #include "asterisk/logger.h"
00043 #include "asterisk/file.h"
00044 #include "asterisk/image.h"
00045 #include "asterisk/translate.h"
00046 #include "asterisk/cli.h"
00047 #include "asterisk/lock.h"
00048
00049
00050 static AST_LIST_HEAD_STATIC(imagers, ast_imager);
00051
00052 int ast_image_register(struct ast_imager *img)
00053 {
00054 if (option_verbose > 1)
00055 ast_verbose(VERBOSE_PREFIX_2 "Registered format '%s' (%s)\n", img->name, img->desc);
00056 AST_LIST_LOCK(&imagers);
00057 AST_LIST_INSERT_HEAD(&imagers, img, list);
00058 AST_LIST_UNLOCK(&imagers);
00059 return 0;
00060 }
00061
00062 void ast_image_unregister(struct ast_imager *img)
00063 {
00064 struct ast_imager *i;
00065
00066 AST_LIST_LOCK(&imagers);
00067 AST_LIST_TRAVERSE_SAFE_BEGIN(&imagers, i, list) {
00068 if (i == img) {
00069 AST_LIST_REMOVE_CURRENT(&imagers, list);
00070 break;
00071 }
00072 }
00073 AST_LIST_TRAVERSE_SAFE_END
00074 AST_LIST_UNLOCK(&imagers);
00075 if (i && (option_verbose > 1))
00076 ast_verbose(VERBOSE_PREFIX_2 "Unregistered format '%s' (%s)\n", img->name, img->desc);
00077 }
00078
00079 int ast_supports_images(struct ast_channel *chan)
00080 {
00081 if (!chan || !chan->tech)
00082 return 0;
00083 if (!chan->tech->send_image)
00084 return 0;
00085 return 1;
00086 }
00087
00088 static int file_exists(char *filename)
00089 {
00090 int res;
00091 struct stat st;
00092 res = stat(filename, &st);
00093 if (!res)
00094 return st.st_size;
00095 return 0;
00096 }
00097
00098 static void make_filename(char *buf, int len, char *filename, const char *preflang, char *ext)
00099 {
00100 if (filename[0] == '/') {
00101 if (!ast_strlen_zero(preflang))
00102 snprintf(buf, len, "%s-%s.%s", filename, preflang, ext);
00103 else
00104 snprintf(buf, len, "%s.%s", filename, ext);
00105 } else {
00106 if (!ast_strlen_zero(preflang))
00107 snprintf(buf, len, "%s/%s/%s-%s.%s", ast_config_AST_DATA_DIR, "images", filename, preflang, ext);
00108 else
00109 snprintf(buf, len, "%s/%s/%s.%s", ast_config_AST_DATA_DIR, "images", filename, ext);
00110 }
00111 }
00112
00113 struct ast_frame *ast_read_image(char *filename, const char *preflang, int format)
00114 {
00115 struct ast_imager *i;
00116 char buf[256];
00117 char tmp[80];
00118 char *e;
00119 struct ast_imager *found = NULL;
00120 int fd;
00121 int len=0;
00122 struct ast_frame *f = NULL;
00123
00124 AST_LIST_LOCK(&imagers);
00125 AST_LIST_TRAVERSE(&imagers, i, list) {
00126 if (i->format & format) {
00127 char *stringp=NULL;
00128 ast_copy_string(tmp, i->exts, sizeof(tmp));
00129 stringp=tmp;
00130 e = strsep(&stringp, "|");
00131 while(e) {
00132 make_filename(buf, sizeof(buf), filename, preflang, e);
00133 if ((len = file_exists(buf))) {
00134 found = i;
00135 break;
00136 }
00137 make_filename(buf, sizeof(buf), filename, NULL, e);
00138 if ((len = file_exists(buf))) {
00139 found = i;
00140 break;
00141 }
00142 e = strsep(&stringp, "|");
00143 }
00144 }
00145 if (found)
00146 break;
00147 }
00148
00149 if (found) {
00150 fd = open(buf, O_RDONLY);
00151 if (fd > -1) {
00152 if (!found->identify || found->identify(fd)) {
00153
00154 lseek(fd, 0, SEEK_SET);
00155 f = found->read_image(fd,len);
00156 } else
00157 ast_log(LOG_WARNING, "%s does not appear to be a %s file\n", buf, found->name);
00158 close(fd);
00159 } else
00160 ast_log(LOG_WARNING, "Unable to open '%s': %s\n", buf, strerror(errno));
00161 } else
00162 ast_log(LOG_WARNING, "Image file '%s' not found\n", filename);
00163
00164 AST_LIST_UNLOCK(&imagers);
00165
00166 return f;
00167 }
00168
00169 int ast_send_image(struct ast_channel *chan, char *filename)
00170 {
00171 struct ast_frame *f;
00172 int res = -1;
00173 if (chan->tech->send_image) {
00174 f = ast_read_image(filename, chan->language, -1);
00175 if (f) {
00176 res = chan->tech->send_image(chan, f);
00177 ast_frfree(f);
00178 }
00179 }
00180 return res;
00181 }
00182
00183 static int show_image_formats_deprecated(int fd, int argc, char *argv[])
00184 {
00185 #define FORMAT "%10s %10s %50s %10s\n"
00186 #define FORMAT2 "%10s %10s %50s %10s\n"
00187 struct ast_imager *i;
00188 if (argc != 3)
00189 return RESULT_SHOWUSAGE;
00190 ast_cli(fd, FORMAT, "Name", "Extensions", "Description", "Format");
00191 AST_LIST_TRAVERSE(&imagers, i, list)
00192 ast_cli(fd, FORMAT2, i->name, i->exts, i->desc, ast_getformatname(i->format));
00193 return RESULT_SUCCESS;
00194 }
00195
00196 static int show_image_formats(int fd, int argc, char *argv[])
00197 {
00198 #define FORMAT "%10s %10s %50s %10s\n"
00199 #define FORMAT2 "%10s %10s %50s %10s\n"
00200 struct ast_imager *i;
00201 if (argc != 4)
00202 return RESULT_SHOWUSAGE;
00203 ast_cli(fd, FORMAT, "Name", "Extensions", "Description", "Format");
00204 AST_LIST_TRAVERSE(&imagers, i, list)
00205 ast_cli(fd, FORMAT2, i->name, i->exts, i->desc, ast_getformatname(i->format));
00206 return RESULT_SUCCESS;
00207 }
00208
00209 struct ast_cli_entry cli_show_image_formats_deprecated = {
00210 { "show", "image", "formats" },
00211 show_image_formats_deprecated, NULL,
00212 NULL };
00213
00214 struct ast_cli_entry cli_image[] = {
00215 { { "core", "show", "image", "formats" },
00216 show_image_formats, "Displays image formats",
00217 "Usage: core show image formats\n"
00218 " displays currently registered image formats (if any)\n", NULL, &cli_show_image_formats_deprecated },
00219 };
00220
00221 int ast_image_init(void)
00222 {
00223 ast_cli_register_multiple(cli_image, sizeof(cli_image) / sizeof(struct ast_cli_entry));
00224 return 0;
00225 }