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00030 #include "asterisk.h"
00031
00032 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 377881 $")
00033
00034 #include <sys/time.h>
00035 #include <sys/stat.h>
00036 #include <signal.h>
00037
00038 #include "asterisk/paths.h"
00039 #include "asterisk/sched.h"
00040 #include "asterisk/channel.h"
00041 #include "asterisk/file.h"
00042 #include "asterisk/image.h"
00043 #include "asterisk/translate.h"
00044 #include "asterisk/cli.h"
00045 #include "asterisk/lock.h"
00046
00047
00048 static AST_RWLIST_HEAD_STATIC(imagers, ast_imager);
00049
00050 int ast_image_register(struct ast_imager *img)
00051 {
00052 AST_RWLIST_WRLOCK(&imagers);
00053 AST_RWLIST_INSERT_HEAD(&imagers, img, list);
00054 AST_RWLIST_UNLOCK(&imagers);
00055 ast_verb(2, "Registered format '%s' (%s)\n", img->name, img->desc);
00056 return 0;
00057 }
00058
00059 void ast_image_unregister(struct ast_imager *img)
00060 {
00061 AST_RWLIST_WRLOCK(&imagers);
00062 img = AST_RWLIST_REMOVE(&imagers, img, list);
00063 AST_RWLIST_UNLOCK(&imagers);
00064
00065 if (img)
00066 ast_verb(2, "Unregistered format '%s' (%s)\n", img->name, img->desc);
00067 }
00068
00069 int ast_supports_images(struct ast_channel *chan)
00070 {
00071 if (!chan || !chan->tech)
00072 return 0;
00073 if (!chan->tech->send_image)
00074 return 0;
00075 return 1;
00076 }
00077
00078 static int file_exists(char *filename)
00079 {
00080 int res;
00081 struct stat st;
00082 res = stat(filename, &st);
00083 if (!res)
00084 return st.st_size;
00085 return 0;
00086 }
00087
00088 static void make_filename(char *buf, int len, const char *filename, const char *preflang, char *ext)
00089 {
00090 if (filename[0] == '/') {
00091 if (!ast_strlen_zero(preflang))
00092 snprintf(buf, len, "%s-%s.%s", filename, preflang, ext);
00093 else
00094 snprintf(buf, len, "%s.%s", filename, ext);
00095 } else {
00096 if (!ast_strlen_zero(preflang))
00097 snprintf(buf, len, "%s/%s/%s-%s.%s", ast_config_AST_DATA_DIR, "images", filename, preflang, ext);
00098 else
00099 snprintf(buf, len, "%s/%s/%s.%s", ast_config_AST_DATA_DIR, "images", filename, ext);
00100 }
00101 }
00102
00103 struct ast_frame *ast_read_image(const char *filename, const char *preflang, int format)
00104 {
00105 struct ast_imager *i;
00106 char buf[256];
00107 char tmp[80];
00108 char *e;
00109 struct ast_imager *found = NULL;
00110 int fd;
00111 int len=0;
00112 struct ast_frame *f = NULL;
00113
00114 AST_RWLIST_RDLOCK(&imagers);
00115 AST_RWLIST_TRAVERSE(&imagers, i, list) {
00116 if (i->format & format) {
00117 char *stringp=NULL;
00118 ast_copy_string(tmp, i->exts, sizeof(tmp));
00119 stringp = tmp;
00120 e = strsep(&stringp, "|");
00121 while (e) {
00122 make_filename(buf, sizeof(buf), filename, preflang, e);
00123 if ((len = file_exists(buf))) {
00124 found = i;
00125 break;
00126 }
00127 make_filename(buf, sizeof(buf), filename, NULL, e);
00128 if ((len = file_exists(buf))) {
00129 found = i;
00130 break;
00131 }
00132 e = strsep(&stringp, "|");
00133 }
00134 }
00135 if (found)
00136 break;
00137 }
00138
00139 if (found) {
00140 fd = open(buf, O_RDONLY);
00141 if (fd > -1) {
00142 if (!found->identify || found->identify(fd)) {
00143
00144 lseek(fd, 0, SEEK_SET);
00145 f = found->read_image(fd, len);
00146 } else
00147 ast_log(LOG_WARNING, "%s does not appear to be a %s file\n", buf, found->name);
00148 close(fd);
00149 } else
00150 ast_log(LOG_WARNING, "Unable to open '%s': %s\n", buf, strerror(errno));
00151 } else
00152 ast_log(LOG_WARNING, "Image file '%s' not found\n", filename);
00153
00154 AST_RWLIST_UNLOCK(&imagers);
00155
00156 return f;
00157 }
00158
00159 int ast_send_image(struct ast_channel *chan, const char *filename)
00160 {
00161 struct ast_frame *f;
00162 int res = -1;
00163 if (chan->tech->send_image) {
00164 f = ast_read_image(filename, chan->language, -1);
00165 if (f) {
00166 res = chan->tech->send_image(chan, f);
00167 ast_frfree(f);
00168 }
00169 }
00170 return res;
00171 }
00172
00173 static char *handle_core_show_image_formats(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
00174 {
00175 #define FORMAT "%10s %10s %50s %10s\n"
00176 #define FORMAT2 "%10s %10s %50s %10s\n"
00177 struct ast_imager *i;
00178 int count_fmt = 0;
00179
00180 switch (cmd) {
00181 case CLI_INIT:
00182 e->command = "core show image formats";
00183 e->usage =
00184 "Usage: core show image formats\n"
00185 " Displays currently registered image formats (if any).\n";
00186 return NULL;
00187 case CLI_GENERATE:
00188 return NULL;
00189 }
00190 if (a->argc != 4)
00191 return CLI_SHOWUSAGE;
00192 ast_cli(a->fd, FORMAT, "Name", "Extensions", "Description", "Format");
00193 ast_cli(a->fd, FORMAT, "----", "----------", "-----------", "------");
00194 AST_RWLIST_RDLOCK(&imagers);
00195 AST_RWLIST_TRAVERSE(&imagers, i, list) {
00196 ast_cli(a->fd, FORMAT2, i->name, i->exts, i->desc, ast_getformatname(i->format));
00197 count_fmt++;
00198 }
00199 AST_RWLIST_UNLOCK(&imagers);
00200 ast_cli(a->fd, "\n%d image format%s registered.\n", count_fmt, count_fmt == 1 ? "" : "s");
00201 return CLI_SUCCESS;
00202 }
00203
00204 static struct ast_cli_entry cli_image[] = {
00205 AST_CLI_DEFINE(handle_core_show_image_formats, "Displays image formats")
00206 };
00207
00208 static void image_shutdown(void)
00209 {
00210 ast_cli_unregister_multiple(cli_image, ARRAY_LEN(cli_image));
00211 }
00212
00213 int ast_image_init(void)
00214 {
00215 ast_cli_register_multiple(cli_image, ARRAY_LEN(cli_image));
00216 ast_register_atexit(image_shutdown);
00217 return 0;
00218 }