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-rw-r--r--dom/media/webm/WebMDecoder.cpp124
1 files changed, 124 insertions, 0 deletions
diff --git a/dom/media/webm/WebMDecoder.cpp b/dom/media/webm/WebMDecoder.cpp
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+++ b/dom/media/webm/WebMDecoder.cpp
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+/* -*- 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 "WebMDecoder.h"
+
+#include <utility>
+
+#include "mozilla/Preferences.h"
+#include "VPXDecoder.h"
+#include "mozilla/StaticPrefs_media.h"
+#ifdef MOZ_AV1
+# include "AOMDecoder.h"
+#endif
+#include "MediaContainerType.h"
+#include "PDMFactory.h"
+#include "PlatformDecoderModule.h"
+#include "VideoUtils.h"
+
+namespace mozilla {
+
+/* static */
+nsTArray<UniquePtr<TrackInfo>> WebMDecoder::GetTracksInfo(
+ const MediaContainerType& aType, MediaResult& aError) {
+ nsTArray<UniquePtr<TrackInfo>> tracks;
+ const bool isVideo = aType.Type() == MEDIAMIMETYPE("video/webm");
+
+ if (aType.Type() != MEDIAMIMETYPE("audio/webm") && !isVideo) {
+ aError = MediaResult(
+ NS_ERROR_DOM_MEDIA_FATAL_ERR,
+ RESULT_DETAIL("Invalid type:%s", aType.Type().AsString().get()));
+ return tracks;
+ }
+
+ aError = NS_OK;
+
+ const MediaCodecs& codecs = aType.ExtendedType().Codecs();
+ if (codecs.IsEmpty()) {
+ return tracks;
+ }
+
+ for (const auto& codec : codecs.Range()) {
+ if (codec.EqualsLiteral("opus") || codec.EqualsLiteral("vorbis")) {
+ tracks.AppendElement(
+ CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
+ "audio/"_ns + NS_ConvertUTF16toUTF8(codec), aType));
+ continue;
+ }
+ if (isVideo) {
+ UniquePtr<TrackInfo> trackInfo;
+ if (IsVP9CodecString(codec)) {
+ trackInfo = CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
+ "video/vp9"_ns, aType);
+ } else if (IsVP8CodecString(codec)) {
+ trackInfo = CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
+ "video/vp8"_ns, aType);
+ }
+ if (trackInfo) {
+ VPXDecoder::SetVideoInfo(trackInfo->GetAsVideoInfo(), codec);
+ tracks.AppendElement(std::move(trackInfo));
+ continue;
+ }
+ }
+#ifdef MOZ_AV1
+ if (StaticPrefs::media_av1_enabled() && IsAV1CodecString(codec)) {
+ auto trackInfo =
+ CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
+ "video/av1"_ns, aType);
+ AOMDecoder::SetVideoInfo(trackInfo->GetAsVideoInfo(), codec);
+ tracks.AppendElement(std::move(trackInfo));
+ continue;
+ }
+#endif
+ // Unknown codec
+ aError = MediaResult(
+ NS_ERROR_DOM_MEDIA_FATAL_ERR,
+ RESULT_DETAIL("Unknown codec:%s", NS_ConvertUTF16toUTF8(codec).get()));
+ }
+ return tracks;
+}
+
+/* static */
+bool WebMDecoder::IsSupportedType(const MediaContainerType& aContainerType) {
+ if (!StaticPrefs::media_webm_enabled()) {
+ return false;
+ }
+
+ MediaResult rv = NS_OK;
+ auto tracks = GetTracksInfo(aContainerType, rv);
+
+ if (NS_FAILED(rv)) {
+ return false;
+ }
+
+ if (tracks.IsEmpty()) {
+ // WebM guarantees that the only codecs it contained are vp8, vp9, opus or
+ // vorbis.
+ return true;
+ }
+
+ // Verify that we have a PDM that supports the whitelisted types, include
+ // color depth
+ RefPtr<PDMFactory> platform = new PDMFactory();
+ for (const auto& track : tracks) {
+ if (!track || platform->Supports(SupportDecoderParams(*track),
+ nullptr /* diagnostic */) ==
+ media::DecodeSupport::Unsupported) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+/* static */
+nsTArray<UniquePtr<TrackInfo>> WebMDecoder::GetTracksInfo(
+ const MediaContainerType& aType) {
+ MediaResult rv = NS_OK;
+ return GetTracksInfo(aType, rv);
+}
+
+} // namespace mozilla