1 files changed, 44 insertions, 0 deletions
diff --git a/dom/media/mp3/MP3Decoder.cpp b/dom/media/mp3/MP3Decoder.cpp
new file mode 100644
index 0000000000..573b621b26
--- /dev/null
+++ b/dom/media/mp3/MP3Decoder.cpp
@@ -0,0 +1,44 @@
+/* -*- 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 "MP3Decoder.h"
+#include "MediaContainerType.h"
+#include "PDMFactory.h"
+
+namespace mozilla {
+
+/* static */
+bool MP3Decoder::IsEnabled() {
+  RefPtr<PDMFactory> platform = new PDMFactory();
+  return !platform->SupportsMimeType("audio/mpeg"_ns).isEmpty();
+}
+
+/* static */
+bool MP3Decoder::IsSupportedType(const MediaContainerType& aContainerType) {
+  if (aContainerType.Type() == MEDIAMIMETYPE("audio/mp3") ||
+      aContainerType.Type() == MEDIAMIMETYPE("audio/mpeg")) {
+    return IsEnabled() && (aContainerType.ExtendedType().Codecs().IsEmpty() ||
+                           aContainerType.ExtendedType().Codecs() == "mp3");
+  }
+  return false;
+}
+
+/* static */
+nsTArray<UniquePtr<TrackInfo>> MP3Decoder::GetTracksInfo(
+    const MediaContainerType& aType) {
+  nsTArray<UniquePtr<TrackInfo>> tracks;
+  if (!IsSupportedType(aType)) {
+    return tracks;
+  }
+
+  tracks.AppendElement(
+      CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
+          "audio/mpeg"_ns, aType));
+
+  return tracks;
+}
+
+}  // namespace mozilla