1 files changed, 89 insertions, 0 deletions
diff --git a/frame.c b/frame.c
new file mode 100755
index 000000000..ba0e48e92
--- /dev/null
+++ b/frame.c
@@ -0,0 +1,89 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Frame manipulation routines
+ * 
+ * Copyright (C) 1999, Adtran Inc. and Linux Support Services, LLC
+ *
+ * Mark Spencer <markster@linux-support.net>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+
+#include <asterisk/frame.h>
+#include <asterisk/logger.h>
+#include <stdlib.h>
+#include <string.h>
+
+/*
+ * Important: I should be made more efficient.  Frame headers should
+ * most definitely be cached
+ */
+
+void ast_frfree(struct ast_frame *fr)
+{
+	if (fr->mallocd & AST_MALLOCD_DATA) {
+		if (fr->data) 
+			free(fr->data - fr->offset);
+	}
+	if (fr->mallocd & AST_MALLOCD_SRC) {
+		if (fr->src)
+			free(fr->src);
+	}
+	if (fr->mallocd & AST_MALLOCD_HDR) {
+		free(fr);
+	}
+}
+
+void ast_frchain(struct ast_frame_chain *fc)
+{
+	struct ast_frame_chain *last;
+	while(fc) {
+		last = fc;
+		fc = fc->next;
+		if (last->fr)
+			ast_frfree(last->fr);
+		free(last);
+	}
+}
+
+struct ast_frame *ast_frisolate(struct ast_frame *fr)
+{
+	struct ast_frame *out;
+	if (!(fr->mallocd & AST_MALLOCD_HDR)) {
+		/* Allocate a new header if needed */
+		out = malloc(sizeof(struct ast_frame));
+		if (!out) {
+			ast_log(LOG_WARNING, "Out of memory\n");
+			return NULL;
+		}
+		out->frametype = fr->frametype;
+		out->subclass = fr->subclass;
+		out->datalen = 0;
+		out->timelen = fr->timelen;
+		out->offset = 0;
+		out->src = NULL;
+		out->data = NULL;
+	} else {
+		out = fr;
+	}
+	if (!(fr->mallocd & AST_MALLOCD_SRC)) {
+		if (fr->src)
+			out->src = strdup(fr->src);
+	} else
+		out->src = fr->src;
+	if (!(fr->mallocd & AST_MALLOCD_DATA))  {
+		out->data = malloc(fr->datalen + fr->offset);
+		out->data += fr->offset;
+		out->offset = fr->offset;
+		out->datalen = fr->datalen;
+		memcpy(out->data, fr->data, fr->datalen);
+		if (!out->data) {
+			ast_log(LOG_WARNING, "Out of memory\n");
+			return NULL;
+		}
+	}
+	out->mallocd = AST_MALLOCD_HDR | AST_MALLOCD_SRC | AST_MALLOCD_DATA;
+	return out;
+}