audio: remove ao_driver.drain

The recent change to the common code removed all calls to ->drain. It's
currently emulated via a timed sleep and polling ao_eof_reached(). That
is actually fallback code for AOs which lacked draining. I could just
readd the drain call, but it was a bad idea anyway. My plan to handle
this better is to require the AO to signal a underrun, even if
AOPLAY_FINAL_CHUNK is not set. Also reinstate not possibly waiting for
ao_lavc.c. ao_pcm.c did not have anything to handle this; whatever.

1 files changed, 0 insertions, 6 deletions

diff --git a/audio/out/ao_lavc.c b/audio/out/ao_lavc.c
index a38c01e0b2..ad3865964c 100644
--- a/audio/out/ao_lavc.c
+++ b/audio/out/ao_lavc.c
@@ -345,11 +345,6 @@ static int play(struct ao *ao, void **data, int samples, int flags)
     return taken;
 }
 
-static void drain(struct ao *ao)
-{
-    // pretend we support it, so generic code doesn't force a wait
-}
-
 const struct ao_driver audio_out_lavc = {
     .encode = true,
     .description = "audio encoding using libavcodec",
@@ -361,7 +356,6 @@ const struct ao_driver audio_out_lavc = {
     .uninit    = uninit,
     .get_space = get_space,
     .play      = play,
-    .drain     = drain,
 };
 
 // vim: sw=4 ts=4 et tw=80