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Diffstat (limited to 'dom/media/mediasource/MediaSource.cpp')
| -rw-r--r-- | dom/media/mediasource/MediaSource.cpp | 669 |
1 files changed, 669 insertions, 0 deletions
diff --git a/dom/media/mediasource/MediaSource.cpp b/dom/media/mediasource/MediaSource.cpp new file mode 100644 index 0000000000..79c8d737c6 --- /dev/null +++ b/dom/media/mediasource/MediaSource.cpp @@ -0,0 +1,669 @@ +/* -*- 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 "MediaSource.h" + +#include "AsyncEventRunner.h" +#include "Benchmark.h" +#include "DecoderDoctorDiagnostics.h" +#include "DecoderTraits.h" +#include "MediaContainerType.h" +#include "MediaResult.h" +#include "MediaSourceDemuxer.h" +#include "MediaSourceUtils.h" +#include "SourceBuffer.h" +#include "SourceBufferList.h" +#include "mozilla/ErrorResult.h" +#include "mozilla/FloatingPoint.h" +#include "mozilla/Logging.h" +#include "mozilla/Sprintf.h" +#include "mozilla/StaticPrefs_media.h" +#include "mozilla/dom/BindingDeclarations.h" +#include "mozilla/dom/HTMLMediaElement.h" +#include "mozilla/gfx/gfxVars.h" +#include "mozilla/mozalloc.h" +#include "nsDebug.h" +#include "nsError.h" +#include "nsIRunnable.h" +#include "nsIScriptObjectPrincipal.h" +#include "nsMimeTypes.h" +#include "nsPIDOMWindow.h" +#include "nsServiceManagerUtils.h" +#include "nsString.h" +#include "nsThreadUtils.h" + +#ifdef MOZ_WIDGET_ANDROID +# include "AndroidBridge.h" +# include "mozilla/java/HardwareCodecCapabilityUtilsWrappers.h" +#endif + +struct JSContext; +class JSObject; + +mozilla::LogModule* GetMediaSourceLog() { + static mozilla::LazyLogModule sLogModule("MediaSource"); + return sLogModule; +} + +mozilla::LogModule* GetMediaSourceAPILog() { + static mozilla::LazyLogModule sLogModule("MediaSource"); + return sLogModule; +} + +#define MSE_DEBUG(arg, ...) \ + DDMOZ_LOG(GetMediaSourceLog(), mozilla::LogLevel::Debug, "::%s: " arg, \ + __func__, ##__VA_ARGS__) +#define MSE_API(arg, ...) \ + DDMOZ_LOG(GetMediaSourceAPILog(), mozilla::LogLevel::Debug, "::%s: " arg, \ + __func__, ##__VA_ARGS__) + +// Arbitrary limit. +static const unsigned int MAX_SOURCE_BUFFERS = 16; + +namespace mozilla { + +// Returns true if we should enable MSE webm regardless of preferences. +// 1. If MP4/H264 isn't supported: +// * Windows XP +// * Windows Vista and Server 2008 without the optional "Platform Update +// Supplement" +// * N/KN editions (Europe and Korea) of Windows 7/8/8.1/10 without the +// optional "Windows Media Feature Pack" +// 2. If H264 hardware acceleration is not available. +// 3. The CPU is considered to be fast enough +static bool IsVP9Forced(DecoderDoctorDiagnostics* aDiagnostics) { + bool mp4supported = DecoderTraits::IsMP4SupportedType( + MediaContainerType(MEDIAMIMETYPE(VIDEO_MP4)), aDiagnostics); + bool hwsupported = gfx::gfxVars::CanUseHardwareVideoDecoding(); +#ifdef MOZ_WIDGET_ANDROID + return !mp4supported || !hwsupported || VP9Benchmark::IsVP9DecodeFast() || + java::HardwareCodecCapabilityUtils::HasHWVP9(false /* aIsEncoder */); +#else + return !mp4supported || !hwsupported || VP9Benchmark::IsVP9DecodeFast(); +#endif +} + +namespace dom { + +static void RecordTypeForTelemetry(const nsAString& aType, + nsPIDOMWindowInner* aWindow) { + Maybe<MediaContainerType> containerType = MakeMediaContainerType(aType); + if (!containerType) { + return; + } + + const MediaMIMEType& mimeType = containerType->Type(); + if (mimeType == MEDIAMIMETYPE(VIDEO_WEBM)) { + AccumulateCategorical( + mozilla::Telemetry::LABELS_MSE_SOURCE_BUFFER_TYPE::VideoWebm); + } else if (mimeType == MEDIAMIMETYPE(AUDIO_WEBM)) { + AccumulateCategorical( + mozilla::Telemetry::LABELS_MSE_SOURCE_BUFFER_TYPE::AudioWebm); + } else if (mimeType == MEDIAMIMETYPE(VIDEO_MP4)) { + AccumulateCategorical( + mozilla::Telemetry::LABELS_MSE_SOURCE_BUFFER_TYPE::VideoMp4); + } else if (mimeType == MEDIAMIMETYPE(AUDIO_MP4)) { + AccumulateCategorical( + mozilla::Telemetry::LABELS_MSE_SOURCE_BUFFER_TYPE::AudioMp4); + } else if (mimeType == MEDIAMIMETYPE(VIDEO_MPEG_TS)) { + AccumulateCategorical( + mozilla::Telemetry::LABELS_MSE_SOURCE_BUFFER_TYPE::VideoMp2t); + } else if (mimeType == MEDIAMIMETYPE(AUDIO_MPEG_TS)) { + AccumulateCategorical( + mozilla::Telemetry::LABELS_MSE_SOURCE_BUFFER_TYPE::AudioMp2t); + } else if (mimeType == MEDIAMIMETYPE(AUDIO_MP3)) { + AccumulateCategorical( + mozilla::Telemetry::LABELS_MSE_SOURCE_BUFFER_TYPE::AudioMpeg); + } else if (mimeType == MEDIAMIMETYPE(AUDIO_AAC)) { + AccumulateCategorical( + mozilla::Telemetry::LABELS_MSE_SOURCE_BUFFER_TYPE::AudioAac); + } +} + +/* static */ +void MediaSource::IsTypeSupported(const nsAString& aType, + DecoderDoctorDiagnostics* aDiagnostics, + ErrorResult& aRv) { + if (aType.IsEmpty()) { + return aRv.ThrowTypeError("Empty type"); + } + + Maybe<MediaContainerType> containerType = MakeMediaContainerType(aType); + if (!containerType) { + return aRv.ThrowNotSupportedError("Unknown type"); + } + + if (DecoderTraits::CanHandleContainerType(*containerType, aDiagnostics) == + CANPLAY_NO) { + return aRv.ThrowNotSupportedError("Can't play type"); + } + + bool hasVP9 = false; + const MediaCodecs& codecs = containerType->ExtendedType().Codecs(); + for (const auto& codec : codecs.Range()) { + if (IsVP9CodecString(codec)) { + hasVP9 = true; + break; + } + } + + // Now we know that this media type could be played. + // MediaSource imposes extra restrictions, and some prefs. + const MediaMIMEType& mimeType = containerType->Type(); + if (mimeType == MEDIAMIMETYPE("video/mp4") || + mimeType == MEDIAMIMETYPE("audio/mp4")) { + if (!StaticPrefs::media_mediasource_mp4_enabled()) { + // Don't leak information about the fact that it's pref-disabled; just act + // like we can't play it. Or should this throw "Unknown type"? + return aRv.ThrowNotSupportedError("Can't play type"); + } + if (!StaticPrefs::media_mediasource_vp9_enabled() && hasVP9 && + !IsVP9Forced(aDiagnostics)) { + // Don't leak information about the fact that it's pref-disabled; just act + // like we can't play it. Or should this throw "Unknown type"? + return aRv.ThrowNotSupportedError("Can't play type"); + } + + return; + } + if (mimeType == MEDIAMIMETYPE("video/webm")) { + if (!StaticPrefs::media_mediasource_webm_enabled()) { + // Don't leak information about the fact that it's pref-disabled; just act + // like we can't play it. Or should this throw "Unknown type"? + return aRv.ThrowNotSupportedError("Can't play type"); + } + if (!StaticPrefs::media_mediasource_vp9_enabled() && hasVP9 && + !IsVP9Forced(aDiagnostics)) { + // Don't leak information about the fact that it's pref-disabled; just act + // like we can't play it. Or should this throw "Unknown type"? + return aRv.ThrowNotSupportedError("Can't play type"); + } + return; + } + if (mimeType == MEDIAMIMETYPE("audio/webm")) { + if (!(StaticPrefs::media_mediasource_webm_enabled() || + StaticPrefs::media_mediasource_webm_audio_enabled())) { + // Don't leak information about the fact that it's pref-disabled; just act + // like we can't play it. Or should this throw "Unknown type"? + return aRv.ThrowNotSupportedError("Can't play type"); + } + return; + } + + return aRv.ThrowNotSupportedError("Type not supported in MediaSource"); +} + +/* static */ +already_AddRefed<MediaSource> MediaSource::Constructor( + const GlobalObject& aGlobal, ErrorResult& aRv) { + nsCOMPtr<nsPIDOMWindowInner> window = + do_QueryInterface(aGlobal.GetAsSupports()); + if (!window) { + aRv.Throw(NS_ERROR_UNEXPECTED); + return nullptr; + } + + RefPtr<MediaSource> mediaSource = new MediaSource(window); + return mediaSource.forget(); +} + +MediaSource::~MediaSource() { + MOZ_ASSERT(NS_IsMainThread()); + MSE_API(""); + if (mDecoder) { + mDecoder->DetachMediaSource(); + } +} + +SourceBufferList* MediaSource::SourceBuffers() { + MOZ_ASSERT(NS_IsMainThread()); + MOZ_ASSERT_IF(mReadyState == MediaSourceReadyState::Closed, + mSourceBuffers->IsEmpty()); + return mSourceBuffers; +} + +SourceBufferList* MediaSource::ActiveSourceBuffers() { + MOZ_ASSERT(NS_IsMainThread()); + MOZ_ASSERT_IF(mReadyState == MediaSourceReadyState::Closed, + mActiveSourceBuffers->IsEmpty()); + return mActiveSourceBuffers; +} + +MediaSourceReadyState MediaSource::ReadyState() { + MOZ_ASSERT(NS_IsMainThread()); + return mReadyState; +} + +double MediaSource::Duration() { + MOZ_ASSERT(NS_IsMainThread()); + if (mReadyState == MediaSourceReadyState::Closed) { + return UnspecifiedNaN<double>(); + } + MOZ_ASSERT(mDecoder); + return mDecoder->GetDuration(); +} + +void MediaSource::SetDuration(double aDuration, ErrorResult& aRv) { + MOZ_ASSERT(NS_IsMainThread()); + if (aDuration < 0 || IsNaN(aDuration)) { + nsPrintfCString error("Invalid duration value %f", aDuration); + MSE_API("SetDuration(aDuration=%f, invalid value)", aDuration); + aRv.ThrowTypeError(error); + return; + } + if (mReadyState != MediaSourceReadyState::Open || + mSourceBuffers->AnyUpdating()) { + MSE_API("SetDuration(aDuration=%f, invalid state)", aDuration); + aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR); + return; + } + DurationChange(aDuration, aRv); + MSE_API("SetDuration(aDuration=%f, errorCode=%d)", aDuration, + aRv.ErrorCodeAsInt()); +} + +void MediaSource::SetDuration(double aDuration) { + MOZ_ASSERT(NS_IsMainThread()); + MSE_API("SetDuration(aDuration=%f)", aDuration); + mDecoder->SetMediaSourceDuration(aDuration); +} + +already_AddRefed<SourceBuffer> MediaSource::AddSourceBuffer( + const nsAString& aType, ErrorResult& aRv) { + MOZ_ASSERT(NS_IsMainThread()); + DecoderDoctorDiagnostics diagnostics; + IsTypeSupported(aType, &diagnostics, aRv); + RecordTypeForTelemetry(aType, GetOwner()); + bool supported = !aRv.Failed(); + diagnostics.StoreFormatDiagnostics( + GetOwner() ? GetOwner()->GetExtantDoc() : nullptr, aType, supported, + __func__); + MSE_API("AddSourceBuffer(aType=%s)%s", NS_ConvertUTF16toUTF8(aType).get(), + supported ? "" : " [not supported]"); + if (!supported) { + return nullptr; + } + if (mSourceBuffers->Length() >= MAX_SOURCE_BUFFERS) { + aRv.Throw(NS_ERROR_DOM_QUOTA_EXCEEDED_ERR); + return nullptr; + } + if (mReadyState != MediaSourceReadyState::Open) { + aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR); + return nullptr; + } + Maybe<MediaContainerType> containerType = MakeMediaContainerType(aType); + if (!containerType) { + aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR); + return nullptr; + } + RefPtr<SourceBuffer> sourceBuffer = new SourceBuffer(this, *containerType); + mSourceBuffers->Append(sourceBuffer); + DDLINKCHILD("sourcebuffer[]", sourceBuffer.get()); + MSE_DEBUG("sourceBuffer=%p", sourceBuffer.get()); + return sourceBuffer.forget(); +} + +RefPtr<MediaSource::ActiveCompletionPromise> MediaSource::SourceBufferIsActive( + SourceBuffer* aSourceBuffer) { + MOZ_ASSERT(NS_IsMainThread()); + mActiveSourceBuffers->ClearSimple(); + bool initMissing = false; + bool found = false; + for (uint32_t i = 0; i < mSourceBuffers->Length(); i++) { + SourceBuffer* sourceBuffer = mSourceBuffers->IndexedGetter(i, found); + MOZ_ALWAYS_TRUE(found); + if (sourceBuffer == aSourceBuffer) { + mActiveSourceBuffers->Append(aSourceBuffer); + } else if (sourceBuffer->IsActive()) { + mActiveSourceBuffers->AppendSimple(sourceBuffer); + } else { + // Some source buffers haven't yet received an init segment. + // There's nothing more we can do at this stage. + initMissing = true; + } + } + if (initMissing || !mDecoder) { + return ActiveCompletionPromise::CreateAndResolve(true, __func__); + } + + mDecoder->NotifyInitDataArrived(); + + // Add our promise to the queue. + // It will be resolved once the HTMLMediaElement modifies its readyState. + MozPromiseHolder<ActiveCompletionPromise> holder; + RefPtr<ActiveCompletionPromise> promise = holder.Ensure(__func__); + mCompletionPromises.AppendElement(std::move(holder)); + return promise; +} + +void MediaSource::CompletePendingTransactions() { + MOZ_ASSERT(NS_IsMainThread()); + MSE_DEBUG("Resolving %u promises", unsigned(mCompletionPromises.Length())); + for (auto& promise : mCompletionPromises) { + promise.Resolve(true, __func__); + } + mCompletionPromises.Clear(); +} + +void MediaSource::RemoveSourceBuffer(SourceBuffer& aSourceBuffer, + ErrorResult& aRv) { + MOZ_ASSERT(NS_IsMainThread()); + SourceBuffer* sourceBuffer = &aSourceBuffer; + MSE_API("RemoveSourceBuffer(aSourceBuffer=%p)", sourceBuffer); + if (!mSourceBuffers->Contains(sourceBuffer)) { + aRv.Throw(NS_ERROR_DOM_NOT_FOUND_ERR); + return; + } + + sourceBuffer->AbortBufferAppend(); + // TODO: + // abort stream append loop (if running) + + // TODO: + // For all sourceBuffer audioTracks, videoTracks, textTracks: + // set sourceBuffer to null + // remove sourceBuffer video, audio, text Tracks from MediaElement tracks + // remove sourceBuffer video, audio, text Tracks and fire "removetrack" at + // affected lists fire "removetrack" at modified MediaElement track lists + // If removed enabled/selected, fire "change" at affected MediaElement list. + if (mActiveSourceBuffers->Contains(sourceBuffer)) { + mActiveSourceBuffers->Remove(sourceBuffer); + } + mSourceBuffers->Remove(sourceBuffer); + DDUNLINKCHILD(sourceBuffer); + // TODO: Free all resources associated with sourceBuffer +} + +void MediaSource::EndOfStream( + const Optional<MediaSourceEndOfStreamError>& aError, ErrorResult& aRv) { + MOZ_ASSERT(NS_IsMainThread()); + MSE_API("EndOfStream(aError=%d)", + aError.WasPassed() ? uint32_t(aError.Value()) : 0); + if (mReadyState != MediaSourceReadyState::Open || + mSourceBuffers->AnyUpdating()) { + aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR); + return; + } + + SetReadyState(MediaSourceReadyState::Ended); + mSourceBuffers->Ended(); + if (!aError.WasPassed()) { + DurationChange(mSourceBuffers->GetHighestBufferedEndTime(), aRv); + // Notify reader that all data is now available. + mDecoder->Ended(true); + return; + } + switch (aError.Value()) { + case MediaSourceEndOfStreamError::Network: + mDecoder->NetworkError(MediaResult(NS_ERROR_FAILURE, "MSE network")); + break; + case MediaSourceEndOfStreamError::Decode: + mDecoder->DecodeError(NS_ERROR_DOM_MEDIA_FATAL_ERR); + break; + default: + MOZ_ASSERT_UNREACHABLE( + "Someone added a MediaSourceReadyState value and didn't handle it " + "here"); + break; + } +} + +void MediaSource::EndOfStream(const MediaResult& aError) { + MOZ_ASSERT(NS_IsMainThread()); + MSE_API("EndOfStream(aError=%s)", aError.ErrorName().get()); + + SetReadyState(MediaSourceReadyState::Ended); + mSourceBuffers->Ended(); + mDecoder->DecodeError(aError); +} + +/* static */ +bool MediaSource::IsTypeSupported(const GlobalObject& aOwner, + const nsAString& aType) { + MOZ_ASSERT(NS_IsMainThread()); + DecoderDoctorDiagnostics diagnostics; + IgnoredErrorResult rv; + IsTypeSupported(aType, &diagnostics, rv); + bool supported = !rv.Failed(); + nsCOMPtr<nsPIDOMWindowInner> window = + do_QueryInterface(aOwner.GetAsSupports()); + RecordTypeForTelemetry(aType, window); + diagnostics.StoreFormatDiagnostics(window ? window->GetExtantDoc() : nullptr, + aType, supported, __func__); + MOZ_LOG(GetMediaSourceAPILog(), mozilla::LogLevel::Debug, + ("MediaSource::%s: IsTypeSupported(aType=%s) %s", __func__, + NS_ConvertUTF16toUTF8(aType).get(), + supported ? "OK" : "[not supported]")); + return supported; +} + +void MediaSource::SetLiveSeekableRange(double aStart, double aEnd, + ErrorResult& aRv) { + MOZ_ASSERT(NS_IsMainThread()); + + // 1. If the readyState attribute is not "open" then throw an + // InvalidStateError exception and abort these steps. + if (mReadyState != MediaSourceReadyState::Open) { + aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR); + return; + } + + // 2. If start is negative or greater than end, then throw a TypeError + // exception and abort these steps. + if (aStart < 0 || aStart > aEnd) { + aRv.ThrowTypeError("Invalid start value"); + return; + } + + // 3. Set live seekable range to be a new normalized TimeRanges object + // containing a single range whose start position is start and end position is + // end. + mLiveSeekableRange = + Some(media::TimeInterval(media::TimeUnit::FromSeconds(aStart), + media::TimeUnit::FromSeconds(aEnd))); +} + +void MediaSource::ClearLiveSeekableRange(ErrorResult& aRv) { + MOZ_ASSERT(NS_IsMainThread()); + + // 1. If the readyState attribute is not "open" then throw an + // InvalidStateError exception and abort these steps. + if (mReadyState != MediaSourceReadyState::Open) { + aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR); + return; + } + + // 2. If live seekable range contains a range, then set live seekable range to + // be a new empty TimeRanges object. + mLiveSeekableRange.reset(); +} + +bool MediaSource::Attach(MediaSourceDecoder* aDecoder) { + MOZ_ASSERT(NS_IsMainThread()); + MSE_DEBUG("Attach(aDecoder=%p) owner=%p", aDecoder, aDecoder->GetOwner()); + MOZ_ASSERT(aDecoder); + MOZ_ASSERT(aDecoder->GetOwner()); + if (mReadyState != MediaSourceReadyState::Closed) { + return false; + } + MOZ_ASSERT(!mMediaElement); + mMediaElement = aDecoder->GetOwner()->GetMediaElement(); + MOZ_ASSERT(!mDecoder); + mDecoder = aDecoder; + mDecoder->AttachMediaSource(this); + SetReadyState(MediaSourceReadyState::Open); + return true; +} + +void MediaSource::Detach() { + MOZ_ASSERT(NS_IsMainThread()); + MOZ_RELEASE_ASSERT(mCompletionPromises.IsEmpty()); + MSE_DEBUG("mDecoder=%p owner=%p", mDecoder.get(), + mDecoder ? mDecoder->GetOwner() : nullptr); + if (!mDecoder) { + MOZ_ASSERT(mReadyState == MediaSourceReadyState::Closed); + MOZ_ASSERT(mActiveSourceBuffers->IsEmpty() && mSourceBuffers->IsEmpty()); + return; + } + mMediaElement = nullptr; + SetReadyState(MediaSourceReadyState::Closed); + if (mActiveSourceBuffers) { + mActiveSourceBuffers->Clear(); + } + if (mSourceBuffers) { + mSourceBuffers->Clear(); + } + mDecoder->DetachMediaSource(); + mDecoder = nullptr; +} + +MediaSource::MediaSource(nsPIDOMWindowInner* aWindow) + : DOMEventTargetHelper(aWindow), + mDecoder(nullptr), + mPrincipal(nullptr), + mAbstractMainThread( + GetOwnerGlobal()->AbstractMainThreadFor(TaskCategory::Other)), + mReadyState(MediaSourceReadyState::Closed) { + MOZ_ASSERT(NS_IsMainThread()); + mSourceBuffers = new SourceBufferList(this); + mActiveSourceBuffers = new SourceBufferList(this); + + nsCOMPtr<nsIScriptObjectPrincipal> sop = do_QueryInterface(aWindow); + if (sop) { + mPrincipal = sop->GetPrincipal(); + } + + MSE_API("MediaSource(aWindow=%p) mSourceBuffers=%p mActiveSourceBuffers=%p", + aWindow, mSourceBuffers.get(), mActiveSourceBuffers.get()); +} + +void MediaSource::SetReadyState(MediaSourceReadyState aState) { + MOZ_ASSERT(NS_IsMainThread()); + MOZ_ASSERT(aState != mReadyState); + MSE_DEBUG("SetReadyState(aState=%" PRIu32 ") mReadyState=%" PRIu32, + static_cast<uint32_t>(aState), static_cast<uint32_t>(mReadyState)); + + MediaSourceReadyState oldState = mReadyState; + mReadyState = aState; + + if (mReadyState == MediaSourceReadyState::Open && + (oldState == MediaSourceReadyState::Closed || + oldState == MediaSourceReadyState::Ended)) { + QueueAsyncSimpleEvent("sourceopen"); + if (oldState == MediaSourceReadyState::Ended) { + // Notify reader that more data may come. + mDecoder->Ended(false); + } + return; + } + + if (mReadyState == MediaSourceReadyState::Ended && + oldState == MediaSourceReadyState::Open) { + QueueAsyncSimpleEvent("sourceended"); + return; + } + + if (mReadyState == MediaSourceReadyState::Closed && + (oldState == MediaSourceReadyState::Open || + oldState == MediaSourceReadyState::Ended)) { + QueueAsyncSimpleEvent("sourceclose"); + return; + } + + NS_WARNING("Invalid MediaSource readyState transition"); +} + +void MediaSource::DispatchSimpleEvent(const char* aName) { + MOZ_ASSERT(NS_IsMainThread()); + MSE_API("Dispatch event '%s'", aName); + DispatchTrustedEvent(NS_ConvertUTF8toUTF16(aName)); +} + +void MediaSource::QueueAsyncSimpleEvent(const char* aName) { + MSE_DEBUG("Queuing event '%s'", aName); + nsCOMPtr<nsIRunnable> event = new AsyncEventRunner<MediaSource>(this, aName); + mAbstractMainThread->Dispatch(event.forget()); +} + +void MediaSource::DurationChange(double aNewDuration, ErrorResult& aRv) { + MOZ_ASSERT(NS_IsMainThread()); + MSE_DEBUG("DurationChange(aNewDuration=%f)", aNewDuration); + + // 1. If the current value of duration is equal to new duration, then return. + if (mDecoder->GetDuration() == aNewDuration) { + return; + } + + // 2. If new duration is less than the highest starting presentation timestamp + // of any buffered coded frames for all SourceBuffer objects in sourceBuffers, + // then throw an InvalidStateError exception and abort these steps. + if (aNewDuration < mSourceBuffers->HighestStartTime()) { + aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR); + return; + } + + // 3. Let highest end time be the largest track buffer ranges end time across + // all the track buffers across all SourceBuffer objects in sourceBuffers. + double highestEndTime = mSourceBuffers->HighestEndTime(); + // 4. If new duration is less than highest end time, then + // 4.1 Update new duration to equal highest end time. + aNewDuration = std::max(aNewDuration, highestEndTime); + + // 5. Update the media duration to new duration and run the HTMLMediaElement + // duration change algorithm. + mDecoder->SetMediaSourceDuration(aNewDuration); +} + +already_AddRefed<Promise> MediaSource::MozDebugReaderData(ErrorResult& aRv) { + // Creating a JS promise + nsPIDOMWindowInner* win = GetOwner(); + if (!win) { + aRv.Throw(NS_ERROR_UNEXPECTED); + return nullptr; + } + RefPtr<Promise> domPromise = Promise::Create(win->AsGlobal(), aRv); + if (NS_WARN_IF(aRv.Failed())) { + return nullptr; + } + MOZ_ASSERT(domPromise); + UniquePtr<MediaSourceDecoderDebugInfo> info = + MakeUnique<MediaSourceDecoderDebugInfo>(); + mDecoder->RequestDebugInfo(*info)->Then( + mAbstractMainThread, __func__, + [domPromise, infoPtr = std::move(info)] { + domPromise->MaybeResolve(infoPtr.get()); + }, + [] { + MOZ_ASSERT_UNREACHABLE("Unexpected rejection while getting debug data"); + }); + + return domPromise.forget(); +} + +nsPIDOMWindowInner* MediaSource::GetParentObject() const { return GetOwner(); } + +JSObject* MediaSource::WrapObject(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) { + return MediaSource_Binding::Wrap(aCx, this, aGivenProto); +} + +NS_IMPL_CYCLE_COLLECTION_INHERITED(MediaSource, DOMEventTargetHelper, + mMediaElement, mSourceBuffers, + mActiveSourceBuffers) + +NS_IMPL_ADDREF_INHERITED(MediaSource, DOMEventTargetHelper) +NS_IMPL_RELEASE_INHERITED(MediaSource, DOMEventTargetHelper) + +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaSource) + NS_INTERFACE_MAP_ENTRY(mozilla::dom::MediaSource) +NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper) + +#undef MSE_DEBUG +#undef MSE_API + +} // namespace dom + +} // namespace mozilla |