From dafc85637aa93ad28c1fd066e35899787ee00db0 Mon Sep 17 00:00:00 2001
From: Berin Martini <berin.martini@gmail.com>
Date: Thu, 29 Oct 2015 01:03:17 +0000
Subject: [PATCH] New function in library 'axis_memory_offset'

This function takes as argument an offset indexed from zero and returns a usage
pointer corresponding to the offset from the start of the CMA region. Thus an
argument offset of zero would give the pointer to the start of the CMA region.
---
 lib/interface.c | 7 +++++++
 lib/interface.h | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/lib/interface.c b/lib/interface.c
index fea24c2..782b341 100644
--- a/lib/interface.c
+++ b/lib/interface.c
@@ -183,6 +183,13 @@ unsigned int axis_memory_addr(void *ptr)
 	return (mem_start + ((unsigned int)ptr) - ((unsigned int)mem));
 }
 
+void *axis_memory_offset(unsigned int offset)
+{
+	assert(offset < MEM_SIZE);
+
+	return &mem[offset];
+}
+
 unsigned int axis_stream_length(const int length, const int byte_nb)
 {
 	assert(length);
diff --git a/lib/interface.h b/lib/interface.h
index cc6bc28..58a4d47 100644
--- a/lib/interface.h
+++ b/lib/interface.h
@@ -37,6 +37,8 @@ extern "C" {
 
 	unsigned int axis_memory_addr(void *ptr);
 
+	void *axis_memory_offset(unsigned int offset);
+
 	unsigned int axis_stream_length(const int length, const int byte_nb);
 
 #ifdef __cplusplus