From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Sun, 13 Oct 2013 23:10:25 +0000 (+0200)
Subject: Make the ALSA reader handle and recover from underruns.
X-Git-Url: https://git.sesse.net/?p=pitch;a=commitdiff_plain;h=HEAD

Make the ALSA reader handle and recover from underruns.
---

diff --git a/linux_audio.cpp b/linux_audio.cpp
index 8b0d756..c07e6bb 100644
--- a/linux_audio.cpp
+++ b/linux_audio.cpp
@@ -86,8 +86,13 @@ void read_chunk(snd_pcm_t *handle, short *in, unsigned num_samples)
 			printf("EOF\n");
 			exit(0);
 		}
-		if (ret == -1) {
-			perror("read");
+		if (ret == -EPIPE) {
+			fprintf(stderr, "ALSA underrun\n");
+			snd_pcm_prepare(handle);
+			continue;
+		}
+		if (ret < 0) {
+			fprintf(stderr, "snd_pcm_readi: %s\n", snd_strerror(ret));
 			exit(1);
 		}
 		in += ret;