Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 88 insertions, 0 deletions

diff --git a/dom/media/AudioNotificationReceiver.cpp b/dom/media/AudioNotificationReceiver.cpp
new file mode 100644
index 0000000000..7bb215cc2a
--- /dev/null
+++ b/dom/media/AudioNotificationReceiver.cpp
@@ -0,0 +1,88 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "AudioNotificationReceiver.h"
+#include "mozilla/Logging.h"      // for LazyLogModule
+#include "mozilla/StaticMutex.h"  // for StaticMutex
+#include "mozilla/StaticPtr.h"    // for StaticAutoPtr
+#include "nsAppRunner.h"          // for XRE_IsContentProcess
+#include "nsTArray.h"             // for nsTArray
+
+static mozilla::LazyLogModule sLogger("AudioNotificationReceiver");
+
+#undef ANR_LOG
+#define ANR_LOG(...) MOZ_LOG(sLogger, mozilla::LogLevel::Debug, (__VA_ARGS__))
+#undef ANR_LOGW
+#define ANR_LOGW(...) \
+  MOZ_LOG(sLogger, mozilla::LogLevel::Warning, (__VA_ARGS__))
+
+namespace mozilla {
+namespace audio {
+
+/*
+ * A list containing all clients subscribering the device-changed notifications.
+ */
+static StaticAutoPtr<nsTArray<DeviceChangeListener*>> sSubscribers;
+static StaticMutex sMutex;
+
+/*
+ * AudioNotificationReceiver Implementation
+ */
+/* static */
+void AudioNotificationReceiver::Register(
+    DeviceChangeListener* aDeviceChangeListener) {
+  MOZ_ASSERT(XRE_IsContentProcess());
+
+  StaticMutexAutoLock lock(sMutex);
+  if (!sSubscribers) {
+    sSubscribers = new nsTArray<DeviceChangeListener*>();
+  }
+  sSubscribers->AppendElement(aDeviceChangeListener);
+
+  ANR_LOG("The DeviceChangeListener: %p is registered successfully.",
+          aDeviceChangeListener);
+}
+
+/* static */
+void AudioNotificationReceiver::Unregister(
+    DeviceChangeListener* aDeviceChangeListener) {
+  MOZ_ASSERT(XRE_IsContentProcess());
+
+  StaticMutexAutoLock lock(sMutex);
+  MOZ_ASSERT(!sSubscribers->IsEmpty(), "No subscriber.");
+
+  sSubscribers->RemoveElement(aDeviceChangeListener);
+  if (sSubscribers->IsEmpty()) {
+    // Clear the static pointer here to prevent memory leak.
+    sSubscribers = nullptr;
+  }
+
+  ANR_LOG("The DeviceChangeListener: %p is unregistered successfully.",
+          aDeviceChangeListener);
+}
+
+/* static */
+void AudioNotificationReceiver::NotifyDefaultDeviceChanged() {
+  MOZ_ASSERT(XRE_IsContentProcess());
+
+  StaticMutexAutoLock lock(sMutex);
+
+  // Do nothing when there is no DeviceChangeListener.
+  if (!sSubscribers) {
+    return;
+  }
+
+  for (DeviceChangeListener* stream : *sSubscribers) {
+    ANR_LOG(
+        "Notify the DeviceChangeListener: %p "
+        "that the default device has been changed.",
+        stream);
+    stream->ResetDefaultDevice();
+  }
+}
+
+}  // namespace audio
+}  // namespace mozilla