Diagnostics

1 files changed, 6 insertions, 5 deletions

diff --git a/PCM.h b/PCM.h
index c9d7f7f..2c338f3 100644
--- a/PCM.h
+++ b/PCM.h
@@ -5,6 +5,7 @@
 #include "config.h"
 
 #include <alsa/asoundlib.h>
+#include <fmt/format.h>
 
 #include <iostream>
 #include <string>
@@ -18,8 +19,7 @@ public:
   {
     // non-blocking
     if ((err = snd_pcm_open(&handle, device, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK)) < 0) {
-        printf("Playback open error: %s\n", snd_strerror(err));
-        exit(EXIT_FAILURE);
+        throw std::runtime_error(fmt::format("Playback open error: {}", snd_strerror(err)));
     }
     if ((err = snd_pcm_set_params(handle,
                       SND_PCM_FORMAT_S16_LE,
@@ -28,8 +28,7 @@ public:
                       f_sample,
                       1,
                       100000)) < 0) {   // latency in us
-        printf("Playback open error: %s\n", snd_strerror(err));
-        exit(EXIT_FAILURE);
+        throw std::runtime_error(fmt::format("Playback open error: {}", snd_strerror(err)));
     }
 
     m_stream.generate();
@@ -54,6 +53,8 @@ public:
 
     if (npfd != 1) {
       std::cout << "Warning: " << std::to_string(npfd) << " poll fds for pcm" << std::endl;
+    } else if (fd() <= 2) {
+      std::cout << "Warning: Bad PCM fd: " << std::to_string(fd()) << std::endl;
     }
   }
 
@@ -62,7 +63,7 @@ public:
     // pass the remaining samples, otherwise they're dropped in close
     err = snd_pcm_drain(handle);
     if (err < 0)
-        printf("snd_pcm_drain failed: %s\n", snd_strerror(err));
+        std::cerr << fmt::format("snd_pcm_drain failed: {}", snd_strerror(err)) << std::endl;
     snd_pcm_close(handle);
 
     free(pfd);