From 2a2dc4d73ce00f408ef217d78ee8d80fd6b8511f Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Wed, 21 Jan 2015 19:38:18 +0100
Subject: [PATCH] ao_alsa: reinitialize if device got broken

Apparently, physically disconnecting the audio device (consider USB
audio) breaks the ALSA device handle forever. It will signal ENODEV.
Fortunately, it's easy for us to handle this, and we can just use
existing mechanisms that will make the playback core close and reopen
the AO. Whether the immediate reopening will actually succeeds really is
ALSA's problem, though.
---
 audio/out/ao_alsa.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/audio/out/ao_alsa.c b/audio/out/ao_alsa.c
index ab27039d23..6bc2fe03d0 100644
--- a/audio/out/ao_alsa.c
+++ b/audio/out/ao_alsa.c
@@ -846,6 +846,9 @@ static int play(struct ao *ao, void **data, int samples, int flags)
 
         if (res == -EINTR || res == -EAGAIN) { /* retry */
             res = 0;
+        } else if (res == -ENODEV) {
+            MP_WARN(ao, "Device lost, trying to recover...\n");
+            ao_request_reload(ao);
         } else if (res < 0) {
             if (res == -ESTRPIPE) {  /* suspend */
                 resume_device(ao);