1 files changed, 48 insertions, 0 deletions
diff --git a/dom/base/nsDOMWindowUtils.cpp b/dom/base/nsDOMWindowUtils.cpp
index d05f3b71fc..3606a1b0bc 100644
--- a/dom/base/nsDOMWindowUtils.cpp
+++ b/dom/base/nsDOMWindowUtils.cpp
@@ -74,6 +74,7 @@
 #include "Layers.h"
 #include "gfxPrefs.h"
 
+#include "mozilla/dom/AudioDeviceInfo.h"
 #include "mozilla/dom/Element.h"
 #include "mozilla/dom/TabChild.h"
 #include "mozilla/dom/IDBFactoryBinding.h"
@@ -2371,6 +2372,53 @@ nsDOMWindowUtils::GetCurrentAudioBackend(nsAString& aBackend)
 }
 
 NS_IMETHODIMP
+nsDOMWindowUtils::GetCurrentMaxAudioChannels(uint32_t* aChannels)
+{
+  *aChannels = CubebUtils::MaxNumberOfChannels();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsDOMWindowUtils::GetCurrentPreferredChannelLayout(nsAString& aLayout)
+{
+  CubebUtils::GetPreferredChannelLayout(aLayout);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsDOMWindowUtils::GetCurrentPreferredSampleRate(uint32_t* aRate)
+{
+  *aRate = CubebUtils::PreferredSampleRate();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsDOMWindowUtils::AudioDevices(uint16_t aSide, nsIArray** aDevices)
+{
+  NS_ENSURE_ARG_POINTER(aDevices);
+  NS_ENSURE_ARG((aSide == AUDIO_INPUT) || (aSide == AUDIO_OUTPUT));
+  *aDevices = nullptr;
+
+  nsresult rv = NS_OK;
+  nsCOMPtr<nsIMutableArray> devices =
+    do_CreateInstance(NS_ARRAY_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsTArray<RefPtr<AudioDeviceInfo>> collection;
+  CubebUtils::GetDeviceCollection(collection,
+                                  aSide == AUDIO_INPUT
+                                    ? CubebUtils::Side::Input
+                                    : CubebUtils::Side::Output);
+  for (auto device: collection) {
+    devices->AppendElement(device, false);
+  }
+
+  devices.forget(aDevices);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
 nsDOMWindowUtils::StartFrameTimeRecording(uint32_t *startIndex)
 {
   NS_ENSURE_ARG_POINTER(startIndex);