From 87ab6c6ea822f9f7b393d1cb83c9f579d728326a Mon Sep 17 00:00:00 2001
From: William Hubbs <w.d.hubbs@gmail.com>
Date: Sat, 27 Jun 2009 13:32:43 -0500
Subject: [PATCH] make sure that snd_pcm_drop is successful.

This was suggested by Kirk Reiser and Chris Brannon.
---
 alsa.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/alsa.c b/alsa.c
index e1174ac..cb74395 100644
--- a/alsa.c
+++ b/alsa.c
@@ -58,13 +58,20 @@ static int alsa_callback(short *audio, int numsamples, espeak_EVENT * events)
 	int samples_written = 0;
 	int avail;
 	int to_write;
+	int rc;
 	snd_pcm_state_t state;
 	int user_data_new;
 
 	pthread_mutex_lock(&audio_mutex);
 	user_data_new = *(int *) events->user_data;
 	if (stop_requested) {
-		snd_pcm_drop(handle);
+		rc = snd_pcm_drop(handle);
+		while(rc < 0) {
+			fprintf(stderr, "Negative return from snd_pcm_drop!\n");
+			/* Try to reset stream. */
+			snd_pcm_prepare(handle);
+			rc = snd_pcm_drop(handle);
+		}
 		stop_requested = 0;
 		discarding_packets = 1;
 	}