From d3072ae827282e6cb75235a37a1ecefd326b9f19 Mon Sep 17 00:00:00 2001
From: Mike Brady <mikebrady@eircom.net>
Date: Tue, 9 Apr 2019 11:35:46 +0100
Subject: [PATCH] Give error if alsa output device can't be found.

---
 audio_alsa.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/audio_alsa.c b/audio_alsa.c
index 86016a37..d3acf577 100644
--- a/audio_alsa.c
+++ b/audio_alsa.c
@@ -298,8 +298,14 @@ int actual_open_alsa_device(void) {
   // ret = snd_pcm_open(&alsa_handle, alsa_out_dev, SND_PCM_STREAM_PLAYBACK,
   // SND_PCM_NONBLOCK);
   ret = snd_pcm_open(&alsa_handle, alsa_out_dev, SND_PCM_STREAM_PLAYBACK, 0);
-  if (ret < 0)
-    return ret;
+  if (ret < 0) {
+    if (ret == -ENOENT)
+      die("alsa: can't find output device \"%s\".", alsa_out_dev);
+    } else {
+      char errorstring[1024];
+      strerror_r(-ret, (char *)errorstring, sizeof(errorstring));
+      die("alsa: error %d (\"%s\") opening alsa device \"%s\".", ret, (char *)errorstring, alsa_out_dev);
+  }
 
   snd_pcm_hw_params_alloca(&alsa_params);
   snd_pcm_sw_params_alloca(&alsa_swparams);