aml_amaudioutils: audio hal utilities library [1/1]

PD#SWPL-17555

Problem:
This is the initial import of the utility library
to support audio hal implementation on Linux.

Solution:
This library is added on Linux for:
1. The resampler routines from speex
2. The Android SPDIF encoder
3. Partial Android libcutils support needed
as dependencies for audio hal.

Verify:
Local

Change-Id: I28cbc154c82bf6c395aba2f066a2fe0e6f6349db
Signed-off-by: Tim Yao <tim.yao@amlogic.com>
diff --git a/include/cutils/config_utils.h b/include/cutils/config_utils.h
new file mode 100644
index 0000000..30e762f
--- /dev/null
+++ b/include/cutils/config_utils.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2006 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __CUTILS_CONFIG_UTILS_H
+#define __CUTILS_CONFIG_UTILS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct cnode cnode;
+
+
+struct cnode
+{
+    cnode *next;
+    cnode *first_child;
+    cnode *last_child;
+    const char *name;
+    const char *value;
+};
+
+/* parse a text string into a config node tree */
+void config_load(cnode *root, char *data);
+
+/* parse a file into a config node tree */
+void config_load_file(cnode *root, const char *fn);
+
+/* create a single config node */
+cnode* config_node(const char *name, const char *value);
+
+/* locate a named child of a config node */
+cnode* config_find(cnode *root, const char *name);
+
+/* look up a child by name and return the boolean value */
+int config_bool(cnode *root, const char *name, int _default);
+
+/* look up a child by name and return the string value */
+const char* config_str(cnode *root, const char *name, const char *_default);
+
+/* add a named child to a config node (or modify it if it already exists) */
+void config_set(cnode *root, const char *name, const char *value);
+
+/* free a config node tree */
+void config_free(cnode *root);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif