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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /dom/media/mediacapabilities/MediaCapabilities.cpp
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/media/mediacapabilities/MediaCapabilities.cpp')
-rw-r--r--dom/media/mediacapabilities/MediaCapabilities.cpp656
1 files changed, 656 insertions, 0 deletions
diff --git a/dom/media/mediacapabilities/MediaCapabilities.cpp b/dom/media/mediacapabilities/MediaCapabilities.cpp
new file mode 100644
index 0000000000..abc83dae4d
--- /dev/null
+++ b/dom/media/mediacapabilities/MediaCapabilities.cpp
@@ -0,0 +1,656 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "MediaCapabilities.h"
+
+#include <inttypes.h>
+
+#include <utility>
+
+#include "AllocationPolicy.h"
+#include "Benchmark.h"
+#include "DecoderBenchmark.h"
+#include "DecoderTraits.h"
+#include "MediaInfo.h"
+#include "MediaRecorder.h"
+#include "PDMFactory.h"
+#include "VPXDecoder.h"
+#include "mozilla/ClearOnShutdown.h"
+#include "mozilla/SchedulerGroup.h"
+#include "mozilla/StaticPrefs_media.h"
+#include "mozilla/TaskQueue.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/DOMMozPromiseRequestHolder.h"
+#include "mozilla/dom/MediaCapabilitiesBinding.h"
+#include "mozilla/dom/MediaSource.h"
+#include "mozilla/dom/Promise.h"
+#include "mozilla/dom/WorkerPrivate.h"
+#include "mozilla/dom/WorkerRef.h"
+#include "mozilla/layers/KnowsCompositor.h"
+#include "nsContentUtils.h"
+#include "WindowRenderer.h"
+
+static mozilla::LazyLogModule sMediaCapabilitiesLog("MediaCapabilities");
+
+#define LOG(msg, ...) \
+ DDMOZ_LOG(sMediaCapabilitiesLog, LogLevel::Debug, msg, ##__VA_ARGS__)
+
+namespace mozilla::dom {
+
+static nsCString VideoConfigurationToStr(const VideoConfiguration* aConfig) {
+ if (!aConfig) {
+ return nsCString();
+ }
+
+ nsCString hdrMetaType(
+ aConfig->mHdrMetadataType.WasPassed()
+ ? HdrMetadataTypeValues::GetString(aConfig->mHdrMetadataType.Value())
+ : "?");
+
+ nsCString colorGamut(
+ aConfig->mColorGamut.WasPassed()
+ ? ColorGamutValues::GetString(aConfig->mColorGamut.Value())
+ : "?");
+
+ nsCString transferFunction(aConfig->mTransferFunction.WasPassed()
+ ? TransferFunctionValues::GetString(
+ aConfig->mTransferFunction.Value())
+ : "?");
+
+ auto str = nsPrintfCString(
+ "[contentType:%s width:%d height:%d bitrate:%" PRIu64
+ " framerate:%lf hasAlphaChannel:%s hdrMetadataType:%s colorGamut:%s "
+ "transferFunction:%s scalabilityMode:%s]",
+ NS_ConvertUTF16toUTF8(aConfig->mContentType).get(), aConfig->mWidth,
+ aConfig->mHeight, aConfig->mBitrate, aConfig->mFramerate,
+ aConfig->mHasAlphaChannel.WasPassed()
+ ? aConfig->mHasAlphaChannel.Value() ? "true" : "false"
+ : "?",
+ hdrMetaType.get(), colorGamut.get(), transferFunction.get(),
+ aConfig->mScalabilityMode.WasPassed()
+ ? NS_ConvertUTF16toUTF8(aConfig->mScalabilityMode.Value()).get()
+ : "?");
+ return std::move(str);
+}
+
+static nsCString AudioConfigurationToStr(const AudioConfiguration* aConfig) {
+ if (!aConfig) {
+ return nsCString();
+ }
+ auto str = nsPrintfCString(
+ "[contentType:%s channels:%s bitrate:%" PRIu64 " samplerate:%d]",
+ NS_ConvertUTF16toUTF8(aConfig->mContentType).get(),
+ aConfig->mChannels.WasPassed()
+ ? NS_ConvertUTF16toUTF8(aConfig->mChannels.Value()).get()
+ : "?",
+ aConfig->mBitrate.WasPassed() ? aConfig->mBitrate.Value() : 0,
+ aConfig->mSamplerate.WasPassed() ? aConfig->mSamplerate.Value() : 0);
+ return std::move(str);
+}
+
+static nsCString MediaCapabilitiesInfoToStr(
+ const MediaCapabilitiesInfo* aInfo) {
+ if (!aInfo) {
+ return nsCString();
+ }
+ auto str = nsPrintfCString("[supported:%s smooth:%s powerEfficient:%s]",
+ aInfo->Supported() ? "true" : "false",
+ aInfo->Smooth() ? "true" : "false",
+ aInfo->PowerEfficient() ? "true" : "false");
+ return std::move(str);
+}
+
+static nsCString MediaDecodingConfigurationToStr(
+ const MediaDecodingConfiguration& aConfig) {
+ nsCString str;
+ str += "["_ns;
+ if (aConfig.mVideo.WasPassed()) {
+ str += "video:"_ns + VideoConfigurationToStr(&aConfig.mVideo.Value());
+ if (aConfig.mAudio.WasPassed()) {
+ str += " "_ns;
+ }
+ }
+ if (aConfig.mAudio.WasPassed()) {
+ str += "audio:"_ns + AudioConfigurationToStr(&aConfig.mAudio.Value());
+ }
+ str += "]"_ns;
+ return str;
+}
+
+MediaCapabilities::MediaCapabilities(nsIGlobalObject* aParent)
+ : mParent(aParent) {}
+
+already_AddRefed<Promise> MediaCapabilities::DecodingInfo(
+ const MediaDecodingConfiguration& aConfiguration, ErrorResult& aRv) {
+ RefPtr<Promise> promise = Promise::Create(mParent, aRv);
+ if (aRv.Failed()) {
+ return nullptr;
+ }
+
+ // If configuration is not a valid MediaConfiguration, return a Promise
+ // rejected with a TypeError.
+ if (!aConfiguration.mVideo.WasPassed() &&
+ !aConfiguration.mAudio.WasPassed()) {
+ aRv.ThrowTypeError<MSG_MISSING_REQUIRED_DICTIONARY_MEMBER>(
+ "'audio' or 'video' member of argument of "
+ "MediaCapabilities.decodingInfo");
+ return nullptr;
+ }
+
+ LOG("Processing %s", MediaDecodingConfigurationToStr(aConfiguration).get());
+
+ bool supported = true;
+ Maybe<MediaContainerType> videoContainer;
+ Maybe<MediaContainerType> audioContainer;
+
+ // If configuration.video is present and is not a valid video configuration,
+ // return a Promise rejected with a TypeError.
+ if (aConfiguration.mVideo.WasPassed()) {
+ videoContainer = CheckVideoConfiguration(aConfiguration.mVideo.Value());
+ if (!videoContainer) {
+ aRv.ThrowTypeError<MSG_INVALID_MEDIA_VIDEO_CONFIGURATION>();
+ return nullptr;
+ }
+
+ // We have a video configuration and it is valid. Check if it is supported.
+ supported &=
+ aConfiguration.mType == MediaDecodingType::File
+ ? CheckTypeForFile(aConfiguration.mVideo.Value().mContentType)
+ : CheckTypeForMediaSource(
+ aConfiguration.mVideo.Value().mContentType);
+ }
+ if (aConfiguration.mAudio.WasPassed()) {
+ audioContainer = CheckAudioConfiguration(aConfiguration.mAudio.Value());
+ if (!audioContainer) {
+ aRv.ThrowTypeError<MSG_INVALID_MEDIA_AUDIO_CONFIGURATION>();
+ return nullptr;
+ }
+ // We have an audio configuration and it is valid. Check if it is supported.
+ supported &=
+ aConfiguration.mType == MediaDecodingType::File
+ ? CheckTypeForFile(aConfiguration.mAudio.Value().mContentType)
+ : CheckTypeForMediaSource(
+ aConfiguration.mAudio.Value().mContentType);
+ }
+
+ if (!supported) {
+ auto info = MakeUnique<MediaCapabilitiesInfo>(
+ false /* supported */, false /* smooth */, false /* power efficient */);
+ LOG("%s -> %s", MediaDecodingConfigurationToStr(aConfiguration).get(),
+ MediaCapabilitiesInfoToStr(info.get()).get());
+ promise->MaybeResolve(std::move(info));
+ return promise.forget();
+ }
+
+ nsTArray<UniquePtr<TrackInfo>> tracks;
+ if (aConfiguration.mVideo.WasPassed()) {
+ MOZ_ASSERT(videoContainer.isSome(), "configuration is valid and supported");
+ auto videoTracks = DecoderTraits::GetTracksInfo(*videoContainer);
+ // If the MIME type does not imply a codec, the string MUST
+ // also have one and only one parameter that is named codecs with a value
+ // describing a single media codec. Otherwise, it MUST contain no
+ // parameters.
+ if (videoTracks.Length() != 1) {
+ promise->MaybeRejectWithTypeError<MSG_NO_CODECS_PARAMETER>(
+ videoContainer->OriginalString());
+ return promise.forget();
+ }
+ MOZ_DIAGNOSTIC_ASSERT(videoTracks.ElementAt(0),
+ "must contain a valid trackinfo");
+ // If the type refers to an audio codec, reject now.
+ if (videoTracks[0]->GetType() != TrackInfo::kVideoTrack) {
+ promise
+ ->MaybeRejectWithTypeError<MSG_INVALID_MEDIA_VIDEO_CONFIGURATION>();
+ return promise.forget();
+ }
+ tracks.AppendElements(std::move(videoTracks));
+ }
+ if (aConfiguration.mAudio.WasPassed()) {
+ MOZ_ASSERT(audioContainer.isSome(), "configuration is valid and supported");
+ auto audioTracks = DecoderTraits::GetTracksInfo(*audioContainer);
+ // If the MIME type does not imply a codec, the string MUST
+ // also have one and only one parameter that is named codecs with a value
+ // describing a single media codec. Otherwise, it MUST contain no
+ // parameters.
+ if (audioTracks.Length() != 1) {
+ promise->MaybeRejectWithTypeError<MSG_NO_CODECS_PARAMETER>(
+ audioContainer->OriginalString());
+ return promise.forget();
+ }
+ MOZ_DIAGNOSTIC_ASSERT(audioTracks.ElementAt(0),
+ "must contain a valid trackinfo");
+ // If the type refers to a video codec, reject now.
+ if (audioTracks[0]->GetType() != TrackInfo::kAudioTrack) {
+ promise
+ ->MaybeRejectWithTypeError<MSG_INVALID_MEDIA_AUDIO_CONFIGURATION>();
+ return promise.forget();
+ }
+ tracks.AppendElements(std::move(audioTracks));
+ }
+
+ using CapabilitiesPromise = MozPromise<MediaCapabilitiesInfo, MediaResult,
+ /* IsExclusive = */ true>;
+ nsTArray<RefPtr<CapabilitiesPromise>> promises;
+
+ RefPtr<TaskQueue> taskQueue =
+ TaskQueue::Create(GetMediaThreadPool(MediaThreadType::PLATFORM_DECODER),
+ "MediaCapabilities::TaskQueue");
+ for (auto&& config : tracks) {
+ TrackInfo::TrackType type =
+ config->IsVideo() ? TrackInfo::kVideoTrack : TrackInfo::kAudioTrack;
+
+ MOZ_ASSERT(type == TrackInfo::kAudioTrack ||
+ videoContainer->ExtendedType().GetFramerate().isSome(),
+ "framerate is a required member of VideoConfiguration");
+
+ if (type == TrackInfo::kAudioTrack) {
+ // There's no need to create an audio decoder has we only want to know if
+ // such codec is supported. We do need to call the PDMFactory::Supports
+ // API outside the main thread to get accurate results.
+ promises.AppendElement(
+ InvokeAsync(taskQueue, __func__, [config = std::move(config)]() {
+ RefPtr<PDMFactory> pdm = new PDMFactory();
+ SupportDecoderParams params{*config};
+ if (pdm->Supports(params, nullptr /* decoder doctor */).isEmpty()) {
+ return CapabilitiesPromise::CreateAndReject(NS_ERROR_FAILURE,
+ __func__);
+ }
+ return CapabilitiesPromise::CreateAndResolve(
+ MediaCapabilitiesInfo(true /* supported */, true /* smooth */,
+ true /* power efficient */),
+ __func__);
+ }));
+ continue;
+ }
+
+ // On Windows, the MediaDataDecoder expects to be created on a thread
+ // supporting MTA, which the main thread doesn't. So we use our task queue
+ // to create such decoder and perform initialization.
+
+ RefPtr<layers::KnowsCompositor> compositor = GetCompositor();
+ float frameRate =
+ static_cast<float>(videoContainer->ExtendedType().GetFramerate().ref());
+ const bool shouldResistFingerprinting =
+ mParent->ShouldResistFingerprinting(RFPTarget::MediaCapabilities);
+
+ // clang-format off
+ promises.AppendElement(InvokeAsync(
+ taskQueue, __func__,
+ [taskQueue, frameRate, shouldResistFingerprinting, compositor,
+ config = std::move(config)]() mutable -> RefPtr<CapabilitiesPromise> {
+ // MediaDataDecoder keeps a reference to the config object, so we must
+ // keep it alive until the decoder has been shutdown.
+ static Atomic<uint32_t> sTrackingIdCounter(0);
+ TrackingId trackingId(TrackingId::Source::MediaCapabilities,
+ sTrackingIdCounter++,
+ TrackingId::TrackAcrossProcesses::Yes);
+ CreateDecoderParams params{
+ *config, compositor,
+ CreateDecoderParams::VideoFrameRate(frameRate),
+ TrackInfo::kVideoTrack, Some(std::move(trackingId))};
+ // We want to ensure that all decoder's queries are occurring only
+ // once at a time as it can quickly exhaust the system resources
+ // otherwise.
+ static RefPtr<AllocPolicy> sVideoAllocPolicy = [&taskQueue]() {
+ SchedulerGroup::Dispatch(
+ NS_NewRunnableFunction(
+ "MediaCapabilities::AllocPolicy:Video", []() {
+ ClearOnShutdown(&sVideoAllocPolicy,
+ ShutdownPhase::XPCOMShutdownThreads);
+ }));
+ return new SingleAllocPolicy(TrackInfo::TrackType::kVideoTrack,
+ taskQueue);
+ }();
+ return AllocationWrapper::CreateDecoder(params, sVideoAllocPolicy)
+ ->Then(
+ taskQueue, __func__,
+ [taskQueue, frameRate, shouldResistFingerprinting,
+ config = std::move(config)](
+ AllocationWrapper::AllocateDecoderPromise::
+ ResolveOrRejectValue&& aValue) mutable {
+ if (aValue.IsReject()) {
+ return CapabilitiesPromise::CreateAndReject(
+ std::move(aValue.RejectValue()), __func__);
+ }
+ RefPtr<MediaDataDecoder> decoder =
+ std::move(aValue.ResolveValue());
+ // We now query the decoder to determine if it's power
+ // efficient.
+ RefPtr<CapabilitiesPromise> p = decoder->Init()->Then(
+ taskQueue, __func__,
+ [taskQueue, decoder, frameRate,
+ shouldResistFingerprinting,
+ config = std::move(config)](
+ MediaDataDecoder::InitPromise::
+ ResolveOrRejectValue&& aValue) mutable {
+ RefPtr<CapabilitiesPromise> p;
+ if (aValue.IsReject()) {
+ p = CapabilitiesPromise::CreateAndReject(
+ std::move(aValue.RejectValue()), __func__);
+ } else if (shouldResistFingerprinting) {
+ p = CapabilitiesPromise::CreateAndResolve(
+ MediaCapabilitiesInfo(true /* supported */,
+ true /* smooth */, false /* power efficient */),
+ __func__);
+ } else {
+ MOZ_ASSERT(config->IsVideo());
+ if (StaticPrefs::media_mediacapabilities_from_database()) {
+ nsAutoCString reason;
+ bool powerEfficient =
+ decoder->IsHardwareAccelerated(reason);
+
+ int32_t videoFrameRate = std::clamp<int32_t>(frameRate, 1, INT32_MAX);
+
+ DecoderBenchmarkInfo benchmarkInfo{
+ config->mMimeType,
+ config->GetAsVideoInfo()->mImage.width,
+ config->GetAsVideoInfo()->mImage.height,
+ videoFrameRate, 8};
+
+ p = DecoderBenchmark::Get(benchmarkInfo)->Then(
+ GetMainThreadSerialEventTarget(),
+ __func__,
+ [powerEfficient](int32_t score) {
+ // score < 0 means no entry found.
+ bool smooth = score < 0 || score >
+ StaticPrefs::
+ media_mediacapabilities_drop_threshold();
+ return CapabilitiesPromise::
+ CreateAndResolve(
+ MediaCapabilitiesInfo(
+ true, smooth,
+ powerEfficient),
+ __func__);
+ },
+ [](nsresult rv) {
+ return CapabilitiesPromise::
+ CreateAndReject(rv, __func__);
+ });
+ } else if (config->GetAsVideoInfo()->mImage.height < 480) {
+ // Assume that we can do stuff at 480p or less in
+ // a power efficient manner and smoothly. If
+ // greater than 480p we assume that if the video
+ // decoding is hardware accelerated it will be
+ // smooth and power efficient, otherwise we use
+ // the benchmark to estimate
+ p = CapabilitiesPromise::CreateAndResolve(
+ MediaCapabilitiesInfo(true, true, true),
+ __func__);
+ } else {
+ nsAutoCString reason;
+ bool smooth = true;
+ bool powerEfficient =
+ decoder->IsHardwareAccelerated(reason);
+ if (!powerEfficient &&
+ VPXDecoder::IsVP9(config->mMimeType)) {
+ smooth = VP9Benchmark::IsVP9DecodeFast(
+ true /* default */);
+ uint32_t fps =
+ VP9Benchmark::MediaBenchmarkVp9Fps();
+ if (!smooth && fps > 0) {
+ // The VP9 estimizer decode a 1280x720 video.
+ // Let's adjust the result for the resolution
+ // and frame rate of what we actually want. If
+ // the result is twice that we need we assume
+ // it will be smooth.
+ const auto& videoConfig =
+ *config->GetAsVideoInfo();
+ double needed = ((1280.0 * 720.0) /
+ (videoConfig.mImage.width *
+ videoConfig.mImage.height) *
+ fps) /
+ frameRate;
+ smooth = needed > 2;
+ }
+ }
+
+ p = CapabilitiesPromise::CreateAndResolve(
+ MediaCapabilitiesInfo(true /* supported */,
+ smooth, powerEfficient),
+ __func__);
+ }
+ }
+ MOZ_ASSERT(p.get(), "the promise has been created");
+ // Let's keep alive the decoder and the config object
+ // until the decoder has shutdown.
+ decoder->Shutdown()->Then(
+ taskQueue, __func__,
+ [taskQueue, decoder, config = std::move(config)](
+ const ShutdownPromise::ResolveOrRejectValue&
+ aValue) {});
+ return p;
+ });
+ return p;
+ });
+ }));
+ // clang-format on
+ }
+
+ auto holder = MakeRefPtr<
+ DOMMozPromiseRequestHolder<CapabilitiesPromise::AllPromiseType>>(mParent);
+ RefPtr<nsISerialEventTarget> targetThread;
+ RefPtr<StrongWorkerRef> workerRef;
+
+ if (NS_IsMainThread()) {
+ targetThread = GetMainThreadSerialEventTarget();
+ } else {
+ WorkerPrivate* wp = GetCurrentThreadWorkerPrivate();
+ MOZ_ASSERT(wp, "Must be called from a worker thread");
+ targetThread = wp->HybridEventTarget();
+ workerRef = StrongWorkerRef::Create(
+ wp, "MediaCapabilities", [holder, targetThread]() {
+ MOZ_ASSERT(targetThread->IsOnCurrentThread());
+ holder->DisconnectIfExists();
+ });
+ if (NS_WARN_IF(!workerRef)) {
+ // The worker is shutting down.
+ aRv.Throw(NS_ERROR_FAILURE);
+ return nullptr;
+ }
+ }
+
+ MOZ_ASSERT(targetThread);
+
+ // this is only captured for use with the LOG macro.
+ RefPtr<MediaCapabilities> self = this;
+
+ CapabilitiesPromise::All(targetThread, promises)
+ ->Then(targetThread, __func__,
+ [promise, tracks = std::move(tracks), workerRef, holder,
+ aConfiguration, self,
+ this](CapabilitiesPromise::AllPromiseType::ResolveOrRejectValue&&
+ aValue) {
+ holder->Complete();
+ if (aValue.IsReject()) {
+ auto info = MakeUnique<MediaCapabilitiesInfo>(
+ false /* supported */, false /* smooth */,
+ false /* power efficient */);
+ LOG("%s -> %s",
+ MediaDecodingConfigurationToStr(aConfiguration).get(),
+ MediaCapabilitiesInfoToStr(info.get()).get());
+ promise->MaybeResolve(std::move(info));
+ return;
+ }
+ bool powerEfficient = true;
+ bool smooth = true;
+ for (auto&& capability : aValue.ResolveValue()) {
+ smooth &= capability.Smooth();
+ powerEfficient &= capability.PowerEfficient();
+ }
+ auto info = MakeUnique<MediaCapabilitiesInfo>(
+ true /* supported */, smooth, powerEfficient);
+ LOG("%s -> %s",
+ MediaDecodingConfigurationToStr(aConfiguration).get(),
+ MediaCapabilitiesInfoToStr(info.get()).get());
+ promise->MaybeResolve(std::move(info));
+ })
+ ->Track(*holder);
+
+ return promise.forget();
+}
+
+already_AddRefed<Promise> MediaCapabilities::EncodingInfo(
+ const MediaEncodingConfiguration& aConfiguration, ErrorResult& aRv) {
+ RefPtr<Promise> promise = Promise::Create(mParent, aRv);
+ if (aRv.Failed()) {
+ return nullptr;
+ }
+
+ // If configuration is not a valid MediaConfiguration, return a Promise
+ // rejected with a TypeError.
+ if (!aConfiguration.mVideo.WasPassed() &&
+ !aConfiguration.mAudio.WasPassed()) {
+ aRv.ThrowTypeError<MSG_MISSING_REQUIRED_DICTIONARY_MEMBER>(
+ "'audio' or 'video' member of argument of "
+ "MediaCapabilities.encodingInfo");
+ return nullptr;
+ }
+
+ bool supported = true;
+
+ // If configuration.video is present and is not a valid video configuration,
+ // return a Promise rejected with a TypeError.
+ if (aConfiguration.mVideo.WasPassed()) {
+ if (!CheckVideoConfiguration(aConfiguration.mVideo.Value())) {
+ aRv.ThrowTypeError<MSG_INVALID_MEDIA_VIDEO_CONFIGURATION>();
+ return nullptr;
+ }
+ // We have a video configuration and it is valid. Check if it is supported.
+ supported &=
+ CheckTypeForEncoder(aConfiguration.mVideo.Value().mContentType);
+ }
+ if (aConfiguration.mAudio.WasPassed()) {
+ if (!CheckAudioConfiguration(aConfiguration.mAudio.Value())) {
+ aRv.ThrowTypeError<MSG_INVALID_MEDIA_AUDIO_CONFIGURATION>();
+ return nullptr;
+ }
+ // We have an audio configuration and it is valid. Check if it is supported.
+ supported &=
+ CheckTypeForEncoder(aConfiguration.mAudio.Value().mContentType);
+ }
+
+ auto info = MakeUnique<MediaCapabilitiesInfo>(supported, supported, false);
+ promise->MaybeResolve(std::move(info));
+
+ return promise.forget();
+}
+
+Maybe<MediaContainerType> MediaCapabilities::CheckVideoConfiguration(
+ const VideoConfiguration& aConfig) const {
+ Maybe<MediaExtendedMIMEType> container = MakeMediaExtendedMIMEType(aConfig);
+ if (!container) {
+ return Nothing();
+ }
+ // A valid video MIME type is a string that is a valid media MIME type and for
+ // which the type per [RFC7231] is either video or application.
+ if (!container->Type().HasVideoMajorType() &&
+ !container->Type().HasApplicationMajorType()) {
+ return Nothing();
+ }
+
+ // If the MIME type does not imply a codec, the string MUST also have one and
+ // only one parameter that is named codecs with a value describing a single
+ // media codec. Otherwise, it MUST contain no parameters.
+ // TODO (nsIMOMEHeaderParam doesn't provide backend to count number of
+ // parameters)
+
+ return Some(MediaContainerType(std::move(*container)));
+}
+
+Maybe<MediaContainerType> MediaCapabilities::CheckAudioConfiguration(
+ const AudioConfiguration& aConfig) const {
+ Maybe<MediaExtendedMIMEType> container = MakeMediaExtendedMIMEType(aConfig);
+ if (!container) {
+ return Nothing();
+ }
+ // A valid audio MIME type is a string that is valid media MIME type and for
+ // which the type per [RFC7231] is either audio or application.
+ if (!container->Type().HasAudioMajorType() &&
+ !container->Type().HasApplicationMajorType()) {
+ return Nothing();
+ }
+
+ // If the MIME type does not imply a codec, the string MUST also have one and
+ // only one parameter that is named codecs with a value describing a single
+ // media codec. Otherwise, it MUST contain no parameters.
+ // TODO (nsIMOMEHeaderParam doesn't provide backend to count number of
+ // parameters)
+
+ return Some(MediaContainerType(std::move(*container)));
+}
+
+bool MediaCapabilities::CheckTypeForMediaSource(const nsAString& aType) {
+ IgnoredErrorResult rv;
+ MediaSource::IsTypeSupported(aType, nullptr /* DecoderDoctorDiagnostics */,
+ rv);
+
+ return !rv.Failed();
+}
+
+bool MediaCapabilities::CheckTypeForFile(const nsAString& aType) {
+ Maybe<MediaContainerType> containerType = MakeMediaContainerType(aType);
+ if (!containerType) {
+ return false;
+ }
+
+ return DecoderTraits::CanHandleContainerType(
+ *containerType, nullptr /* DecoderDoctorDiagnostics */) !=
+ CANPLAY_NO;
+}
+
+bool MediaCapabilities::CheckTypeForEncoder(const nsAString& aType) {
+ return MediaRecorder::IsTypeSupported(aType);
+}
+
+already_AddRefed<layers::KnowsCompositor> MediaCapabilities::GetCompositor() {
+ nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(GetParentObject());
+ if (NS_WARN_IF(!window)) {
+ return nullptr;
+ }
+
+ nsCOMPtr<Document> doc = window->GetExtantDoc();
+ if (NS_WARN_IF(!doc)) {
+ return nullptr;
+ }
+ WindowRenderer* renderer = nsContentUtils::WindowRendererForDocument(doc);
+ if (NS_WARN_IF(!renderer)) {
+ return nullptr;
+ }
+ RefPtr<layers::KnowsCompositor> knows = renderer->AsKnowsCompositor();
+ if (NS_WARN_IF(!knows)) {
+ return nullptr;
+ }
+ return knows->GetForMedia().forget();
+}
+
+bool MediaCapabilities::Enabled(JSContext* aCx, JSObject* aGlobal) {
+ return StaticPrefs::media_media_capabilities_enabled();
+}
+
+JSObject* MediaCapabilities::WrapObject(JSContext* aCx,
+ JS::Handle<JSObject*> aGivenProto) {
+ return MediaCapabilities_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaCapabilities)
+ NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+ NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(MediaCapabilities)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(MediaCapabilities)
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(MediaCapabilities, mParent)
+
+// MediaCapabilitiesInfo
+bool MediaCapabilitiesInfo::WrapObject(
+ JSContext* aCx, JS::Handle<JSObject*> aGivenProto,
+ JS::MutableHandle<JSObject*> aReflector) {
+ return MediaCapabilitiesInfo_Binding::Wrap(aCx, this, aGivenProto,
+ aReflector);
+}
+
+} // namespace mozilla::dom