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# 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
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