linux::audio: extract `play_channel`

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/lib/linux/audio.nit b/lib/linux/audio.nit
index a3bfb4f..4b8fdb1 100644 (file)
--- a/lib/linux/audio.nit
+++ b/lib/linux/audio.nit
@@ -56,7 +56,13 @@ redef class Sound
                self.native = native
        end
 
-       redef fun play
+       redef fun play do play_channel(-1, 0)
+
+       # Play this sound on `channel` (or any channel if -1) and return the channel
+       #
+       # Repeat the sound `loops` times, `loops == 0` plays it once,
+       # `loops == 1` plays it twice and `loops == -1` loops infinitely.
+       fun play_channel(channel, loops: Int): Int
        do
                var native = native
 
@@ -70,12 +76,12 @@ redef class Sound
                end
 
                # If there's an error, silently skip
-               if error != null then return
+               if error != null then return -1
                native = self.native
                assert native != null
 
                # Play on any available channel
-               mix.play_channel(-1, native, 0)
+               return mix.play_channel(channel, native, loops)
        end
 end