osx: implement media keys

Media keys are pretty handy if you use mpv as a music player (yes I'm one of
those people that do).

These are the bindings (which lead to the same behaviour as iTunes):
  * NX_KEYTYPE_PLAY   -> MP_KEY_PLAY
  * NX_KEYTYPE_FAST   -> MP_KEY_NEXT
  * NX_KEYTYPE_REWIND -> MP_KEY_PREV

I just handled these ones as the volume one would be pretty invasive. I could
maybe change it to increase the application's volume instead of system volume
only when mpv is frontmost (iTunes does this), but some users would probably
hate it.

1 files changed, 13 insertions, 1 deletions

diff --git a/osdep/macosx_application.m b/osdep/macosx_application.m
index 665a04b222..1329091e12 100644
--- a/osdep/macosx_application.m
+++ b/osdep/macosx_application.m
@@ -120,7 +120,19 @@ static NSString *escape_loadfile_name(NSString *input)
 
 - (void)sendEvent:(NSEvent *)event
 {
-    [super sendEvent:event];
+    if ([event type] == NSSystemDefined && [event subtype] == 8) {
+        // It's a media key! Handle it specially. The magic numbers are reverse
+        // engineered and found on several blog posts. Unfortunately there is
+        // no public API for this. F-bomb.
+        int code  = (([event data1] & 0xFFFF0000) >> 16);
+        int flags = ([event data1] & 0x0000FFFF);
+        int down  = (((flags & 0xFF00) >> 8)) == 0xA;
+
+        if (down)
+            [self.eventsResponder handleMediaKey:code];
+    } else {
+        [super sendEvent:event];
+    }
 
     if (self.inputContext)
         mp_input_wakeup(self.inputContext);