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/*
* Asterisk -- A telephony toolkit for Linux.
*
* JPEG File format support.
*
* Copyright (C) 1999, Mark Spencer
*
* Mark Spencer <markster@linux-support.net>
*
* This program is free software, distributed under the terms of
* the GNU General Public License
*/
#include <asterisk/channel.h>
#include <asterisk/file.h>
#include <asterisk/logger.h>
#include <asterisk/sched.h>
#include <asterisk/module.h>
#include <asterisk/image.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <sys/time.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <pthread.h>
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static char *desc = "JPEG (Joint Picture Experts Group) Image Format";
static struct ast_frame *jpeg_read_image(int fd, int len)
{
struct ast_frame fr;
int res;
char buf[65536];
if (len > sizeof(buf)) {
ast_log(LOG_WARNING, "JPEG image too large to read\n");
return NULL;
}
res = read(fd, buf, len);
if (res < len) {
ast_log(LOG_WARNING, "Only read %d of %d bytes: %s\n", res, len, strerror(errno));
}
memset(&fr, 0, sizeof(fr));
fr.frametype = AST_FRAME_IMAGE;
fr.subclass = AST_FORMAT_JPEG;
fr.data = buf;
fr.src = "JPEG Read";
fr.datalen = len;
return ast_frisolate(&fr);
}
static int jpeg_identify(int fd)
{
char buf[10];
int res;
res = read(fd, buf, sizeof(buf));
if (res < sizeof(buf))
return 0;
if (memcmp(buf + 6, "JFIF", 4))
return 0;
return 1;
}
static int jpeg_write_image(int fd, struct ast_frame *fr)
{
int res=0;
if (fr->frametype != AST_FRAME_IMAGE) {
ast_log(LOG_WARNING, "Not an image\n");
return -1;
}
if (fr->subclass != AST_FORMAT_JPEG) {
ast_log(LOG_WARNING, "Not a jpeg image\n");
return -1;
}
if (fr->datalen) {
res = write(fd, fr->data, fr->datalen);
if (res != fr->datalen) {
ast_log(LOG_WARNING, "Only wrote %d of %d bytes: %s\n", res, fr->datalen, strerror(errno));
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return -1;
}
}
return res;
}
static struct ast_imager jpeg_format = {
"jpg",
"JPEG (Joint Picture Experts Group)",
"jpg|jpeg",
AST_FORMAT_JPEG,
jpeg_read_image,
jpeg_identify,
jpeg_write_image,
};
int load_module()
{
return ast_image_register(&jpeg_format);
}
int unload_module()
{
ast_image_unregister(&jpeg_format);
return 0;
}
int usecount()
{
/* We never really have any users */
return 0;
}
char *description()
{
return desc;
}
char *key()
{
return ASTERISK_GPL_KEY;
}