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

media/audio/linux/audio_manager_linux.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/audio_manager_linux.h"
 
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/logging.h"
 #include "base/nix/xdg_util.h"
@@ skipping 45 matching lines @@
   // TODO(ajwong): Make this actually query audio devices.
   return true;
 }
 
 bool AudioManagerLinux::HasAudioInputDevices() {
   if (!initialized()) {
     return false;
   }
 
   // Constants specified by the ALSA API for device hints.
-  static const int kGetAllDevices = -1;
   static const char kPcmInterfaceName[] = "pcm";
   bool has_device = false;
   void** hints = NULL;
+  int card = -1;
 
-  // Use the same approach to find the devices as in
-  // AlsaPcmOutputStream::FindDeviceForChannels
-  // Get Alsa device hints.
-  int error = wrapper_->DeviceNameHint(kGetAllDevices,
-                                       kPcmInterfaceName,
-                                       &hints);
-  if (error == 0) {
-    has_device = HasAnyValidAudioInputDevice(hints);
-  } else {
-    LOG(ERROR) << "Unable to get device hints: " << wrapper_->StrError(error);
+  // Loop through the sound cards to get Alsa device hints.
+  // Don't use snd_device_name_hint(-1,..) since there is a access violation
+  // inside this ALSA API with libasound.so.2.0.0.
+  while (!wrapper_->CardNext(&card) && (card >= 0) && !has_device) {
+    int error = wrapper_->DeviceNameHint(card,
+                                         kPcmInterfaceName,
+                                         &hints);
+    if (error == 0) {
+      has_device = HasAnyValidAudioInputDevice(hints);
+
+      // Destroy the hints now that we're done with it.
+      wrapper_->DeviceNameFreeHint(hints);
+      hints = NULL;
+    } else {
+      LOG(ERROR) << "Unable to get device hints: " << wrapper_->StrError(error);
+    }
   }
 
-  // Destroy the hint now that we're done with it.
-  wrapper_->DeviceNameFreeHint(hints);
   return has_device;
 }
 
 AudioOutputStream* AudioManagerLinux::MakeAudioOutputStream(
     const AudioParameters& params) {
   // Early return for testing hook.  Do this before checking for
   // |initialized_|.
   if (params.format == AudioParameters::AUDIO_MOCK) {
     return FakeAudioOutputStream::MakeFakeStream(params);
   }
@@ skipping 145 matching lines @@
       return true;
   }
 
   return false;
 }
 
 // static
 AudioManager* AudioManager::CreateAudioManager() {
   return new AudioManagerLinux();
 }