commit d811a1bec4ec09153ee6fcf376e2a10ca3a274a2
Author:     Jonathan Dowland <jon+github@alcopop.org>
AuthorDate: Mon Jul 6 20:00:09 2015 +0100
Commit:     Jonathan Dowland <jon+github@alcopop.org>
CommitDate: Wed Jul 8 21:02:01 2015 +0100

    Immediately free pitch-shifted sound effects

    When we stop playing a sound effect on a channel, check to see
    whether it is a pitch-shifted sound effect and whether it's not
    used on any other channel. If so, immediately free it.
---
 src/i_sdlsound.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/i_sdlsound.c b/src/i_sdlsound.c
index 142b5b0a..12476b4f 100644
--- a/src/i_sdlsound.c
+++ b/src/i_sdlsound.c
@@ -350,6 +350,13 @@ static void ReleaseSoundOnChannel(int channel)
     channels_playing[channel] = NULL;

     UnlockAllocatedSound(snd);
+
+    // if the sound is a pitch-shift and it's not in use, immediately
+    // free it
+    if(snd->pitch != NORM_PITCH && snd->use_count <= 0)
+    {
+        FreeAllocatedSound(snd);
+    }
 }

 #ifdef HAVE_LIBSAMPLERATE