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-# 4a-softmixer
\ No newline at end of file
+# Controller Utilities
+
+* Object: Generic Controller Utilities to handle Policy, Small Business Logic, Glue in between components, ...
+* Status: Release Candidate
+* Author: Fulup Ar Foll fulup@iot.bzh
+* Date  : October-2017
+
+## Usage
+
+0) Dependencies
+
+* AGL Application Framework
+
+1) Clone & build from source (temporally from github)
+
+```bash
+git clone --recursive https://github.com/iotbzh/4a-softmixer
+cd build
+cmake ..
+make
+```
+
+2) Activate ALSA loop driver
+
+```modprobe snd-aloop enable=1,1 index=4,5 id=loopback,softmix
+```
+
+3) Declare your controller config section in your binding
+
+```C
+// CtlSectionT syntax:
+// key: "section name in config file"
+// loadCB: callback to process section
+// handle: a void* pass to callback when processing section
+static CtlSectionT ctlSections[]= {
+    {.key="plugins" , .loadCB= PluginConfig, .handle= &halCallbacks},
+    {.key="onload"  , .loadCB= OnloadConfig},
+    {.key="halmap"  , .loadCB= MapConfigLoad},
+    {.key=NULL}
+};
+
+```
+
+3) Do controller config parsing at binding pre-init
+
+```C
+   // check if config file exist
+    const char *dirList= getenv("CTL_CONFIG_PATH");
+    if (!dirList) dirList=CONTROL_CONFIG_PATH;
+
+    ctlConfig = CtlConfigLoad(dirList, ctlSections);
+    if (!ctlConfig) goto OnErrorExit;
+```
+
+4) Exec controller config during binding init
+
+```C
+  int err = CtlConfigExec (ctlConfig);
+```
+
+For sample usage look at https://gerrit.automotivelinux.org/gerrit/gitweb?p=apps/app-controller-submodule.git