This patch is the foundation of an entire new way of looking at media in Asterisk. The code present in this patch is everything required to complete phase1 of my Media Architecture proposal. For more information about this project visit the link below. https://wiki.asterisk.org/wiki/display/AST/Media+Architecture+Proposal The primary function of this patch is to convert all the usages of format bitfields in Asterisk to use the new format and format_cap APIs. Functionally no change in behavior should be present in this patch. Thanks to twilson and russell for all the time they spent reviewing these changes. Review: https://reviewboard.asterisk.org/r/1083/ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@306010 65c4cc65-6c06-0410-ace0-fbb531ad65f3
210 lines
5.3 KiB
C
210 lines
5.3 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2006, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Image Management
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*
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* \author Mark Spencer <markster@digium.com>
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*/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <signal.h>
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#include "asterisk/paths.h" /* use ast_config_AST_DATA_DIR */
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#include "asterisk/sched.h"
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#include "asterisk/channel.h"
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#include "asterisk/file.h"
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#include "asterisk/image.h"
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#include "asterisk/translate.h"
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#include "asterisk/cli.h"
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#include "asterisk/lock.h"
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/* XXX Why don't we just use the formats struct for this? */
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static AST_RWLIST_HEAD_STATIC(imagers, ast_imager);
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int ast_image_register(struct ast_imager *img)
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{
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AST_RWLIST_WRLOCK(&imagers);
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AST_RWLIST_INSERT_HEAD(&imagers, img, list);
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AST_RWLIST_UNLOCK(&imagers);
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ast_verb(2, "Registered format '%s' (%s)\n", img->name, img->desc);
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return 0;
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}
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void ast_image_unregister(struct ast_imager *img)
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{
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AST_RWLIST_WRLOCK(&imagers);
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img = AST_RWLIST_REMOVE(&imagers, img, list);
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AST_RWLIST_UNLOCK(&imagers);
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if (img)
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ast_verb(2, "Unregistered format '%s' (%s)\n", img->name, img->desc);
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}
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int ast_supports_images(struct ast_channel *chan)
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{
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if (!chan || !chan->tech)
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return 0;
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if (!chan->tech->send_image)
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return 0;
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return 1;
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}
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static int file_exists(char *filename)
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{
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int res;
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struct stat st;
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res = stat(filename, &st);
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if (!res)
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return st.st_size;
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return 0;
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}
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static void make_filename(char *buf, int len, const char *filename, const char *preflang, char *ext)
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{
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if (filename[0] == '/') {
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if (!ast_strlen_zero(preflang))
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snprintf(buf, len, "%s-%s.%s", filename, preflang, ext);
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else
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snprintf(buf, len, "%s.%s", filename, ext);
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} else {
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if (!ast_strlen_zero(preflang))
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snprintf(buf, len, "%s/%s/%s-%s.%s", ast_config_AST_DATA_DIR, "images", filename, preflang, ext);
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else
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snprintf(buf, len, "%s/%s/%s.%s", ast_config_AST_DATA_DIR, "images", filename, ext);
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}
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}
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struct ast_frame *ast_read_image(const char *filename, const char *preflang, struct ast_format *format)
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{
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struct ast_imager *i;
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char buf[256];
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char tmp[80];
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char *e;
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struct ast_imager *found = NULL;
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int fd;
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int len=0;
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struct ast_frame *f = NULL;
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AST_RWLIST_RDLOCK(&imagers);
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AST_RWLIST_TRAVERSE(&imagers, i, list) {
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/* if NULL image format, just pick the first one, otherwise match it. */
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if (!format || (ast_format_cmp(&i->format, format) == AST_FORMAT_CMP_EQUAL)) {
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char *stringp=NULL;
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ast_copy_string(tmp, i->exts, sizeof(tmp));
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stringp = tmp;
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e = strsep(&stringp, "|");
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while (e) {
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make_filename(buf, sizeof(buf), filename, preflang, e);
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if ((len = file_exists(buf))) {
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found = i;
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break;
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}
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make_filename(buf, sizeof(buf), filename, NULL, e);
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if ((len = file_exists(buf))) {
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found = i;
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break;
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}
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e = strsep(&stringp, "|");
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}
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}
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if (found)
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break;
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}
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if (found) {
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fd = open(buf, O_RDONLY);
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if (fd > -1) {
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if (!found->identify || found->identify(fd)) {
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/* Reset file pointer */
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lseek(fd, 0, SEEK_SET);
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f = found->read_image(fd, len);
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} else
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ast_log(LOG_WARNING, "%s does not appear to be a %s file\n", buf, found->name);
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close(fd);
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} else
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ast_log(LOG_WARNING, "Unable to open '%s': %s\n", buf, strerror(errno));
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} else
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ast_log(LOG_WARNING, "Image file '%s' not found\n", filename);
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AST_RWLIST_UNLOCK(&imagers);
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return f;
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}
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int ast_send_image(struct ast_channel *chan, const char *filename)
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{
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struct ast_frame *f;
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int res = -1;
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if (chan->tech->send_image) {
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f = ast_read_image(filename, chan->language, NULL);
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if (f) {
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res = chan->tech->send_image(chan, f);
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ast_frfree(f);
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}
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}
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return res;
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}
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static char *handle_core_show_image_formats(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
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{
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#define FORMAT "%10s %10s %50s %10s\n"
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#define FORMAT2 "%10s %10s %50s %10s\n"
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struct ast_imager *i;
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int count_fmt = 0;
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switch (cmd) {
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case CLI_INIT:
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e->command = "core show image formats";
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e->usage =
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"Usage: core show image formats\n"
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" Displays currently registered image formats (if any).\n";
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return NULL;
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case CLI_GENERATE:
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return NULL;
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}
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if (a->argc != 4)
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return CLI_SHOWUSAGE;
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ast_cli(a->fd, FORMAT, "Name", "Extensions", "Description", "Format");
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ast_cli(a->fd, FORMAT, "----", "----------", "-----------", "------");
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AST_RWLIST_RDLOCK(&imagers);
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AST_RWLIST_TRAVERSE(&imagers, i, list) {
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ast_cli(a->fd, FORMAT2, i->name, i->exts, i->desc, ast_getformatname(&i->format));
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count_fmt++;
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}
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AST_RWLIST_UNLOCK(&imagers);
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ast_cli(a->fd, "\n%d image format%s registered.\n", count_fmt, count_fmt == 1 ? "" : "s");
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return CLI_SUCCESS;
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}
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static struct ast_cli_entry cli_image[] = {
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AST_CLI_DEFINE(handle_core_show_image_formats, "Displays image formats")
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};
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int ast_image_init(void)
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{
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ast_cli_register_multiple(cli_image, ARRAY_LEN(cli_image));
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return 0;
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}
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