There is a complain from Valgrind about invalid memory access in snd_device_name_hint(-1, ..) // ...

media/audio/linux/alsa_wrapper.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/audio/linux/alsa_wrapper.h"
 
 #include <alsa/asoundlib.h>
 
 AlsaWrapper::AlsaWrapper() {
 }
@@ skipping 11 matching lines @@
 }
 
 char* AlsaWrapper::DeviceNameGetHint(const void* hint, const char* id) {
   return snd_device_name_get_hint(hint, id);
 }
 
 int AlsaWrapper::DeviceNameFreeHint(void** hints) {
   return snd_device_name_free_hint(hints);
 }
 
+int AlsaWrapper::CardNext(int* rcard) {
+  return snd_card_next(rcard);
+}
+
 int AlsaWrapper::PcmClose(snd_pcm_t* handle) {
   return snd_pcm_close(handle);
 }
 
 int AlsaWrapper::PcmPrepare(snd_pcm_t* handle) {
   return snd_pcm_prepare(handle);
 }
 
 int AlsaWrapper::PcmDrop(snd_pcm_t* handle) {
   return snd_pcm_drop(handle);
@@ skipping 109 matching lines @@
 }
 
 const char* AlsaWrapper::StrError(int errnum) {
   return snd_strerror(errnum);
 }
 
 int AlsaWrapper::PcmStart(snd_pcm_t* handle) {
   return snd_pcm_start(handle);
 }