ALSA Sound Control

Compile

make to compile.

This will create a statically linked library file libsoundctrl.so in bin/ as well as /usr/lib/

API

1. Get system volume range (in dB):

   get_range(int *min, int *max)

2. Get current system volume level

   get_volume()

3. Set system volume:

   set_volume(int dB_value)

Use

The library can be PInvoked (C# example)

[DllImport("libsoundctrl.so", EntryPoint = "set_volume", CallingConvention = CallingConvention.Cdecl)]
static extern void set_volume(int dB_value);

[DllImport("libsoundctrl.so", EntryPoint = "get_volume", CallingConvention = CallingConvention.Cdecl)]
static extern int get_volume();

[DllImport("libsoundctrl.so", EntryPoint = "get_range", CallingConvention = CallingConvention.Cdecl)]
static extern int get_range(ref int min, ref int max);