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-rw-r--r--dom/media/ogg/OggDecoder.cpp82
1 files changed, 82 insertions, 0 deletions
diff --git a/dom/media/ogg/OggDecoder.cpp b/dom/media/ogg/OggDecoder.cpp
new file mode 100644
index 0000000000..5f6d61f694
--- /dev/null
+++ b/dom/media/ogg/OggDecoder.cpp
@@ -0,0 +1,82 @@
+/* -*- 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 "OggDecoder.h"
+#include "MediaContainerType.h"
+#include "MediaDecoder.h"
+#include "mozilla/StaticPrefs_media.h"
+#include "nsMimeTypes.h"
+
+namespace mozilla {
+
+/* static */
+bool OggDecoder::IsSupportedType(const MediaContainerType& aContainerType) {
+ if (!StaticPrefs::media_ogg_enabled()) {
+ return false;
+ }
+
+ if (aContainerType.Type() != MEDIAMIMETYPE(AUDIO_OGG) &&
+ aContainerType.Type() != MEDIAMIMETYPE(VIDEO_OGG) &&
+ aContainerType.Type() != MEDIAMIMETYPE("application/ogg")) {
+ return false;
+ }
+
+ const bool isOggVideo = (aContainerType.Type() != MEDIAMIMETYPE(AUDIO_OGG));
+
+ const MediaCodecs& codecs = aContainerType.ExtendedType().Codecs();
+ if (codecs.IsEmpty()) {
+ // Ogg guarantees that the only codecs it contained are supported.
+ return true;
+ }
+ // Verify that all the codecs specified are ones that we expect that
+ // we can play.
+ for (const auto& codec : codecs.Range()) {
+ if ((MediaDecoder::IsOpusEnabled() && codec.EqualsLiteral("opus")) ||
+ codec.EqualsLiteral("vorbis") || codec.EqualsLiteral("flac")) {
+ continue;
+ }
+ // Note: Only accept Theora in a video container type, not in an audio
+ // container type.
+ if (isOggVideo && codec.EqualsLiteral("theora")) {
+ continue;
+ }
+ // Some unsupported codec.
+ return false;
+ }
+ return true;
+}
+
+/* static */
+nsTArray<UniquePtr<TrackInfo>> OggDecoder::GetTracksInfo(
+ const MediaContainerType& aType) {
+ nsTArray<UniquePtr<TrackInfo>> tracks;
+ if (!IsSupportedType(aType)) {
+ return tracks;
+ }
+
+ const MediaCodecs& codecs = aType.ExtendedType().Codecs();
+ if (codecs.IsEmpty()) {
+ // Codecs must be specified for ogg as it can't be implied.
+ return tracks;
+ }
+
+ for (const auto& codec : codecs.Range()) {
+ if (codec.EqualsLiteral("opus") || codec.EqualsLiteral("vorbis") ||
+ codec.EqualsLiteral("flac")) {
+ tracks.AppendElement(
+ CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
+ "audio/"_ns + NS_ConvertUTF16toUTF8(codec), aType));
+ } else {
+ MOZ_ASSERT(codec.EqualsLiteral("theora"));
+ tracks.AppendElement(
+ CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
+ "video/"_ns + NS_ConvertUTF16toUTF8(codec), aType));
+ }
+ }
+ return tracks;
+}
+
+} // namespace mozilla