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00026 #include "asterisk.h"
00027
00028 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 105840 $")
00029
00030 #include <sys/time.h>
00031 #include <sys/stat.h>
00032 #include <signal.h>
00033
00034 #include "asterisk/paths.h"
00035 #include "asterisk/sched.h"
00036 #include "asterisk/channel.h"
00037 #include "asterisk/file.h"
00038 #include "asterisk/image.h"
00039 #include "asterisk/translate.h"
00040 #include "asterisk/cli.h"
00041 #include "asterisk/lock.h"
00042
00043
00044 static AST_RWLIST_HEAD_STATIC(imagers, ast_imager);
00045
00046 int ast_image_register(struct ast_imager *img)
00047 {
00048 AST_RWLIST_WRLOCK(&imagers);
00049 AST_RWLIST_INSERT_HEAD(&imagers, img, list);
00050 AST_RWLIST_UNLOCK(&imagers);
00051 ast_verb(2, "Registered format '%s' (%s)\n", img->name, img->desc);
00052 return 0;
00053 }
00054
00055 void ast_image_unregister(struct ast_imager *img)
00056 {
00057 AST_RWLIST_WRLOCK(&imagers);
00058 img = AST_RWLIST_REMOVE(&imagers, img, list);
00059 AST_RWLIST_UNLOCK(&imagers);
00060
00061 if (img)
00062 ast_verb(2, "Unregistered format '%s' (%s)\n", img->name, img->desc);
00063 }
00064
00065 int ast_supports_images(struct ast_channel *chan)
00066 {
00067 if (!chan || !chan->tech)
00068 return 0;
00069 if (!chan->tech->send_image)
00070 return 0;
00071 return 1;
00072 }
00073
00074 static int file_exists(char *filename)
00075 {
00076 int res;
00077 struct stat st;
00078 res = stat(filename, &st);
00079 if (!res)
00080 return st.st_size;
00081 return 0;
00082 }
00083
00084 static void make_filename(char *buf, int len, char *filename, const char *preflang, char *ext)
00085 {
00086 if (filename[0] == '/') {
00087 if (!ast_strlen_zero(preflang))
00088 snprintf(buf, len, "%s-%s.%s", filename, preflang, ext);
00089 else
00090 snprintf(buf, len, "%s.%s", filename, ext);
00091 } else {
00092 if (!ast_strlen_zero(preflang))
00093 snprintf(buf, len, "%s/%s/%s-%s.%s", ast_config_AST_DATA_DIR, "images", filename, preflang, ext);
00094 else
00095 snprintf(buf, len, "%s/%s/%s.%s", ast_config_AST_DATA_DIR, "images", filename, ext);
00096 }
00097 }
00098
00099 struct ast_frame *ast_read_image(char *filename, const char *preflang, int format)
00100 {
00101 struct ast_imager *i;
00102 char buf[256];
00103 char tmp[80];
00104 char *e;
00105 struct ast_imager *found = NULL;
00106 int fd;
00107 int len=0;
00108 struct ast_frame *f = NULL;
00109
00110 AST_RWLIST_RDLOCK(&imagers);
00111 AST_RWLIST_TRAVERSE(&imagers, i, list) {
00112 if (i->format & format) {
00113 char *stringp=NULL;
00114 ast_copy_string(tmp, i->exts, sizeof(tmp));
00115 stringp = tmp;
00116 e = strsep(&stringp, "|");
00117 while (e) {
00118 make_filename(buf, sizeof(buf), filename, preflang, e);
00119 if ((len = file_exists(buf))) {
00120 found = i;
00121 break;
00122 }
00123 make_filename(buf, sizeof(buf), filename, NULL, e);
00124 if ((len = file_exists(buf))) {
00125 found = i;
00126 break;
00127 }
00128 e = strsep(&stringp, "|");
00129 }
00130 }
00131 if (found)
00132 break;
00133 }
00134
00135 if (found) {
00136 fd = open(buf, O_RDONLY);
00137 if (fd > -1) {
00138 if (!found->identify || found->identify(fd)) {
00139
00140 lseek(fd, 0, SEEK_SET);
00141 f = found->read_image(fd, len);
00142 } else
00143 ast_log(LOG_WARNING, "%s does not appear to be a %s file\n", buf, found->name);
00144 close(fd);
00145 } else
00146 ast_log(LOG_WARNING, "Unable to open '%s': %s\n", buf, strerror(errno));
00147 } else
00148 ast_log(LOG_WARNING, "Image file '%s' not found\n", filename);
00149
00150 AST_RWLIST_UNLOCK(&imagers);
00151
00152 return f;
00153 }
00154
00155 int ast_send_image(struct ast_channel *chan, char *filename)
00156 {
00157 struct ast_frame *f;
00158 int res = -1;
00159 if (chan->tech->send_image) {
00160 f = ast_read_image(filename, chan->language, -1);
00161 if (f) {
00162 res = chan->tech->send_image(chan, f);
00163 ast_frfree(f);
00164 }
00165 }
00166 return res;
00167 }
00168
00169 static char *handle_core_show_image_formats(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
00170 {
00171 #define FORMAT "%10s %10s %50s %10s\n"
00172 #define FORMAT2 "%10s %10s %50s %10s\n"
00173 struct ast_imager *i;
00174 int count_fmt = 0;
00175
00176 switch (cmd) {
00177 case CLI_INIT:
00178 e->command = "core show image formats";
00179 e->usage =
00180 "Usage: core show image formats\n"
00181 " Displays currently registered image formats (if any).\n";
00182 return NULL;
00183 case CLI_GENERATE:
00184 return NULL;
00185 }
00186 if (a->argc != 4)
00187 return CLI_SHOWUSAGE;
00188 ast_cli(a->fd, FORMAT, "Name", "Extensions", "Description", "Format");
00189 ast_cli(a->fd, FORMAT, "----", "----------", "-----------", "------");
00190 AST_RWLIST_RDLOCK(&imagers);
00191 AST_RWLIST_TRAVERSE(&imagers, i, list) {
00192 ast_cli(a->fd, FORMAT2, i->name, i->exts, i->desc, ast_getformatname(i->format));
00193 count_fmt++;
00194 }
00195 AST_RWLIST_UNLOCK(&imagers);
00196 ast_cli(a->fd, "\n%d image format%s registered.\n", count_fmt, count_fmt == 1 ? "" : "s");
00197 return CLI_SUCCESS;
00198 }
00199
00200 struct ast_cli_entry cli_image[] = {
00201 AST_CLI_DEFINE(handle_core_show_image_formats, "Displays image formats")
00202 };
00203
00204 int ast_image_init(void)
00205 {
00206 ast_cli_register_multiple(cli_image, ARRAY_LEN(cli_image));
00207 return 0;
00208 }