Version 0.1.9 from FTP

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@326 65c4cc65-6c06-0410-ace0-fbb531ad65f3

formats/format_jpeg.c

@@ -0,0 +1,126 @@
+/*
+ * 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>
+#include <endian.h>
+
+
+
+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);
+			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;
+}