From 4db3ee4f7f9377f7c6543c5cb21fc277f0355c6e Mon Sep 17 00:00:00 2001
From: qwell <qwell@5390a7c7-147a-4af0-8ec9-7488f05a26cb>
Date: Tue, 24 Apr 2007 18:33:29 +0000
Subject: Backport pre-echocan debugging for ztmonitor

git-svn-id: http://svn.digium.com/svn/zaptel/branches/1.2@2434 5390a7c7-147a-4af0-8ec9-7488f05a26cb
---
 jpah.h | 104 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 jpah.h

(limited to 'jpah.h')

diff --git a/jpah.h b/jpah.h
new file mode 100644
index 0000000..f72c5fa
--- /dev/null
+++ b/jpah.h
@@ -0,0 +1,104 @@
+/*
+ * ECHO_CAN_JP1
+ *
+ * by Jason Parker
+ *
+ * Based upon mg2ec.h - sort of.
+ * This "echo can" will completely hose your audio.
+ * Don't use it unless you're absolutely sure you know what you're doing.
+ * 
+ * Copyright (C) 2007, Digium, Inc.
+ *
+ * This program is free software and may be used and
+ * distributed according to the terms of the GNU
+ * General Public License, incorporated herein by
+ * reference.
+ *
+ */
+
+#ifndef _JP_ECHO_H
+#define _JP_ECHO_H
+
+#ifdef __KERNEL__
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#define MALLOC(a) kmalloc((a), GFP_KERNEL)
+#define FREE(a) kfree(a)
+#else
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <string.h>
+#define MALLOC(a) malloc(a)
+#define FREE(a) free(a)
+#endif
+
+/* Echo canceller definition */
+struct echo_can_state {
+	/* an arbitrary ID for this echo can - this really should be settable from the calling channel... */
+	int id;
+
+	/* absolute time - aka. sample number index - essentially the number of samples since this can was init'ed */
+	int i_d;
+};
+
+static void echo_can_init(void)
+{
+	printk("Zaptel Audio Hoser: JP1\n");
+}
+
+static void echo_can_identify(char *buf, size_t len)
+{
+	strncpy(buf, "JP1", len);
+}
+
+static void echo_can_shutdown(void)
+{
+}
+
+static inline void init_cc(struct echo_can_state *ec)
+{
+	void *ptr = ec;
+	unsigned long tmp;
+	/* Double-word align past end of state */
+	ptr += sizeof(struct echo_can_state);
+	tmp = (unsigned long)ptr;
+	tmp += 3;
+	tmp &= ~3L;
+	ptr = (void *)tmp;
+}
+
+static inline void echo_can_free(struct echo_can_state *ec)
+{
+	FREE(ec);
+}
+
+static inline short echo_can_update(struct echo_can_state *ec, short iref, short isig) 
+{
+	static int blah = 0;
+
+	if (blah < 2) {
+		blah++;
+		return 0;
+	} else {
+		blah = (blah + 1) % 3;
+		return isig;
+	}
+}
+
+static inline struct echo_can_state *echo_can_create(int len, int adaption_mode)
+{
+	struct echo_can_state *ec;
+	ec = (struct echo_can_state *)MALLOC(sizeof(struct echo_can_state) + 4); /* align */
+	if (ec) {
+		memset(ec, 0, sizeof(struct echo_can_state) + 4); /* align */
+		init_cc(ec);
+	}
+	return ec;
+}
+
+static inline int echo_can_traintap(struct echo_can_state *ec, int pos, short val)
+{
+	return 0;
+}
+#endif
-- 
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