diff options
Diffstat (limited to 'dom/media/ChannelMediaDecoder.cpp')
| -rw-r--r-- | dom/media/ChannelMediaDecoder.cpp | 567 |
1 files changed, 567 insertions, 0 deletions
diff --git a/dom/media/ChannelMediaDecoder.cpp b/dom/media/ChannelMediaDecoder.cpp new file mode 100644 index 0000000000..c6da221f94 --- /dev/null +++ b/dom/media/ChannelMediaDecoder.cpp @@ -0,0 +1,567 @@ +/* -*- 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 "ChannelMediaDecoder.h" +#include "ChannelMediaResource.h" +#include "DecoderTraits.h" +#include "ExternalEngineStateMachine.h" +#include "MediaDecoderStateMachine.h" +#include "MediaFormatReader.h" +#include "BaseMediaResource.h" +#include "MediaShutdownManager.h" +#include "base/process_util.h" +#include "mozilla/Preferences.h" +#include "mozilla/StaticPrefs_media.h" +#include "VideoUtils.h" + +namespace mozilla { + +using TimeUnit = media::TimeUnit; + +extern LazyLogModule gMediaDecoderLog; +#define LOG(x, ...) \ + DDMOZ_LOG(gMediaDecoderLog, LogLevel::Debug, x, ##__VA_ARGS__) + +ChannelMediaDecoder::ResourceCallback::ResourceCallback( + AbstractThread* aMainThread) + : mAbstractMainThread(aMainThread) { + MOZ_ASSERT(aMainThread); + DecoderDoctorLogger::LogConstructionAndBase( + "ChannelMediaDecoder::ResourceCallback", this, + static_cast<const MediaResourceCallback*>(this)); +} + +ChannelMediaDecoder::ResourceCallback::~ResourceCallback() { + DecoderDoctorLogger::LogDestruction("ChannelMediaDecoder::ResourceCallback", + this); +} + +void ChannelMediaDecoder::ResourceCallback::Connect( + ChannelMediaDecoder* aDecoder) { + MOZ_ASSERT(NS_IsMainThread()); + mDecoder = aDecoder; + DecoderDoctorLogger::LinkParentAndChild( + "ChannelMediaDecoder::ResourceCallback", this, "decoder", mDecoder); + mTimer = NS_NewTimer(mAbstractMainThread->AsEventTarget()); +} + +void ChannelMediaDecoder::ResourceCallback::Disconnect() { + MOZ_ASSERT(NS_IsMainThread()); + if (mDecoder) { + DecoderDoctorLogger::UnlinkParentAndChild( + "ChannelMediaDecoder::ResourceCallback", this, mDecoder); + mDecoder = nullptr; + mTimer->Cancel(); + mTimer = nullptr; + } +} + +AbstractThread* ChannelMediaDecoder::ResourceCallback::AbstractMainThread() + const { + return mAbstractMainThread; +} + +MediaDecoderOwner* ChannelMediaDecoder::ResourceCallback::GetMediaOwner() + const { + MOZ_ASSERT(NS_IsMainThread()); + return mDecoder ? mDecoder->GetOwner() : nullptr; +} + +void ChannelMediaDecoder::ResourceCallback::NotifyNetworkError( + const MediaResult& aError) { + MOZ_ASSERT(NS_IsMainThread()); + DDLOGEX2("ChannelMediaDecoder::ResourceCallback", this, DDLogCategory::Log, + "network_error", aError); + if (mDecoder) { + mDecoder->NetworkError(aError); + } +} + +/* static */ +void ChannelMediaDecoder::ResourceCallback::TimerCallback(nsITimer* aTimer, + void* aClosure) { + MOZ_ASSERT(NS_IsMainThread()); + ResourceCallback* thiz = static_cast<ResourceCallback*>(aClosure); + MOZ_ASSERT(thiz->mDecoder); + thiz->mDecoder->NotifyReaderDataArrived(); + thiz->mTimerArmed = false; +} + +void ChannelMediaDecoder::ResourceCallback::NotifyDataArrived() { + MOZ_ASSERT(NS_IsMainThread()); + DDLOGEX2("ChannelMediaDecoder::ResourceCallback", this, DDLogCategory::Log, + "data_arrived", true); + + if (!mDecoder) { + return; + } + + mDecoder->DownloadProgressed(); + + if (mTimerArmed) { + return; + } + // In situations where these notifications come from stochastic network + // activity, we can save significant computation by throttling the + // calls to MediaDecoder::NotifyDataArrived() which will update the buffer + // ranges of the reader. + mTimerArmed = true; + mTimer->InitWithNamedFuncCallback( + TimerCallback, this, sDelay, nsITimer::TYPE_ONE_SHOT, + "ChannelMediaDecoder::ResourceCallback::TimerCallback"); +} + +void ChannelMediaDecoder::ResourceCallback::NotifyDataEnded(nsresult aStatus) { + DDLOGEX2("ChannelMediaDecoder::ResourceCallback", this, DDLogCategory::Log, + "data_ended", aStatus); + MOZ_ASSERT(NS_IsMainThread()); + if (mDecoder) { + mDecoder->NotifyDownloadEnded(aStatus); + } +} + +void ChannelMediaDecoder::ResourceCallback::NotifyPrincipalChanged() { + MOZ_ASSERT(NS_IsMainThread()); + DDLOGEX2("ChannelMediaDecoder::ResourceCallback", this, DDLogCategory::Log, + "principal_changed", true); + if (mDecoder) { + mDecoder->NotifyPrincipalChanged(); + } +} + +void ChannelMediaDecoder::NotifyPrincipalChanged() { + MOZ_ASSERT(NS_IsMainThread()); + MediaDecoder::NotifyPrincipalChanged(); + if (!mInitialChannelPrincipalKnown) { + // We'll receive one notification when the channel's initial principal + // is known, after all HTTP redirects have resolved. This isn't really a + // principal change, so return here to avoid the mSameOriginMedia check + // below. + mInitialChannelPrincipalKnown = true; + return; + } + if (!mSameOriginMedia) { + // Block mid-flight redirects to non CORS same origin destinations. + // See bugs 1441153, 1443942. + LOG("ChannnelMediaDecoder prohibited cross origin redirect blocked."); + NetworkError(MediaResult(NS_ERROR_DOM_BAD_URI, + "Prohibited cross origin redirect blocked")); + } +} + +void ChannelMediaDecoder::ResourceCallback::NotifySuspendedStatusChanged( + bool aSuspendedByCache) { + MOZ_ASSERT(NS_IsMainThread()); + DDLOGEX2("ChannelMediaDecoder::ResourceCallback", this, DDLogCategory::Log, + "suspended_status_changed", aSuspendedByCache); + MediaDecoderOwner* owner = GetMediaOwner(); + if (owner) { + owner->NotifySuspendedByCache(aSuspendedByCache); + } +} + +ChannelMediaDecoder::ChannelMediaDecoder(MediaDecoderInit& aInit) + : MediaDecoder(aInit), + mResourceCallback( + new ResourceCallback(aInit.mOwner->AbstractMainThread())) { + mResourceCallback->Connect(this); +} + +/* static */ +already_AddRefed<ChannelMediaDecoder> ChannelMediaDecoder::Create( + MediaDecoderInit& aInit, DecoderDoctorDiagnostics* aDiagnostics) { + MOZ_ASSERT(NS_IsMainThread()); + RefPtr<ChannelMediaDecoder> decoder; + if (DecoderTraits::CanHandleContainerType(aInit.mContainerType, + aDiagnostics) != CANPLAY_NO) { + decoder = new ChannelMediaDecoder(aInit); + return decoder.forget(); + } + + return nullptr; +} + +bool ChannelMediaDecoder::CanClone() { + MOZ_ASSERT(NS_IsMainThread()); + return mResource && mResource->CanClone(); +} + +already_AddRefed<ChannelMediaDecoder> ChannelMediaDecoder::Clone( + MediaDecoderInit& aInit) { + if (!mResource || DecoderTraits::CanHandleContainerType( + aInit.mContainerType, nullptr) == CANPLAY_NO) { + return nullptr; + } + RefPtr<ChannelMediaDecoder> decoder = new ChannelMediaDecoder(aInit); + nsresult rv = decoder->Load(mResource); + if (NS_FAILED(rv)) { + decoder->Shutdown(); + return nullptr; + } + return decoder.forget(); +} + +MediaDecoderStateMachineBase* ChannelMediaDecoder::CreateStateMachine( + bool aDisableExternalEngine) { + MOZ_ASSERT(NS_IsMainThread()); + MediaFormatReaderInit init; + init.mVideoFrameContainer = GetVideoFrameContainer(); + init.mKnowsCompositor = GetCompositor(); + init.mCrashHelper = GetOwner()->CreateGMPCrashHelper(); + init.mFrameStats = mFrameStats; + init.mResource = mResource; + init.mMediaDecoderOwnerID = mOwner; + static Atomic<uint32_t> sTrackingIdCounter(0); + init.mTrackingId.emplace(TrackingId::Source::ChannelDecoder, + sTrackingIdCounter++, + TrackingId::TrackAcrossProcesses::Yes); + mReader = DecoderTraits::CreateReader(ContainerType(), init); + +#ifdef MOZ_WMF_MEDIA_ENGINE + // TODO : Only for testing development for now. In the future this should be + // used for encrypted content only. + if (StaticPrefs::media_wmf_media_engine_enabled() && + StaticPrefs::media_wmf_media_engine_channel_decoder_enabled() && + !aDisableExternalEngine) { + return new ExternalEngineStateMachine(this, mReader); + } +#endif + return new MediaDecoderStateMachine(this, mReader); +} + +void ChannelMediaDecoder::Shutdown() { + mResourceCallback->Disconnect(); + MediaDecoder::Shutdown(); + + if (mResource) { + // Force any outstanding seek and byterange requests to complete + // to prevent shutdown from deadlocking. + mResourceClosePromise = mResource->Close(); + } +} + +void ChannelMediaDecoder::ShutdownInternal() { + if (!mResourceClosePromise) { + MediaShutdownManager::Instance().Unregister(this); + return; + } + + mResourceClosePromise->Then( + AbstractMainThread(), __func__, + [self = RefPtr<ChannelMediaDecoder>(this)] { + MediaShutdownManager::Instance().Unregister(self); + }); +} + +nsresult ChannelMediaDecoder::Load(nsIChannel* aChannel, + bool aIsPrivateBrowsing, + nsIStreamListener** aStreamListener) { + MOZ_ASSERT(NS_IsMainThread()); + MOZ_ASSERT(!mResource); + MOZ_ASSERT(aStreamListener); + + mResource = BaseMediaResource::Create(mResourceCallback, aChannel, + aIsPrivateBrowsing); + if (!mResource) { + return NS_ERROR_FAILURE; + } + DDLINKCHILD("resource", mResource.get()); + + nsresult rv = MediaShutdownManager::Instance().Register(this); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + + rv = mResource->Open(aStreamListener); + NS_ENSURE_SUCCESS(rv, rv); + return CreateAndInitStateMachine(mResource->IsLiveStream()); +} + +nsresult ChannelMediaDecoder::Load(BaseMediaResource* aOriginal) { + MOZ_ASSERT(NS_IsMainThread()); + MOZ_ASSERT(!mResource); + + mResource = aOriginal->CloneData(mResourceCallback); + if (!mResource) { + return NS_ERROR_FAILURE; + } + DDLINKCHILD("resource", mResource.get()); + + nsresult rv = MediaShutdownManager::Instance().Register(this); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + return CreateAndInitStateMachine(mResource->IsLiveStream()); +} + +void ChannelMediaDecoder::NotifyDownloadEnded(nsresult aStatus) { + MOZ_ASSERT(NS_IsMainThread()); + MOZ_DIAGNOSTIC_ASSERT(!IsShutdown()); + + LOG("NotifyDownloadEnded, status=%" PRIx32, static_cast<uint32_t>(aStatus)); + + if (NS_SUCCEEDED(aStatus)) { + // Download ends successfully. This is a stream with a finite length. + GetStateMachine()->DispatchIsLiveStream(false); + } + + MediaDecoderOwner* owner = GetOwner(); + if (NS_SUCCEEDED(aStatus) || aStatus == NS_BASE_STREAM_CLOSED) { + nsCOMPtr<nsIRunnable> r = NS_NewRunnableFunction( + "ChannelMediaDecoder::UpdatePlaybackRate", + [stats = mPlaybackStatistics, + res = RefPtr<BaseMediaResource>(mResource), duration = mDuration]() { + auto rate = ComputePlaybackRate(stats, res, + duration.match(DurationToTimeUnit())); + UpdatePlaybackRate(rate, res); + }); + nsresult rv = GetStateMachine()->OwnerThread()->Dispatch(r.forget()); + MOZ_DIAGNOSTIC_ASSERT(NS_SUCCEEDED(rv)); + Unused << rv; + owner->DownloadSuspended(); + // NotifySuspendedStatusChanged will tell the element that download + // has been suspended "by the cache", which is true since we never + // download anything. The element can then transition to HAVE_ENOUGH_DATA. + owner->NotifySuspendedByCache(true); + } else if (aStatus == NS_BINDING_ABORTED) { + // Download has been cancelled by user. + owner->LoadAborted(); + } else { + NetworkError(MediaResult(aStatus, "Download aborted")); + } +} + +bool ChannelMediaDecoder::CanPlayThroughImpl() { + MOZ_ASSERT(NS_IsMainThread()); + return mCanPlayThrough; +} + +void ChannelMediaDecoder::OnPlaybackEvent(MediaPlaybackEvent&& aEvent) { + MOZ_ASSERT(NS_IsMainThread()); + switch (aEvent.mType) { + case MediaPlaybackEvent::PlaybackStarted: + mPlaybackPosition = aEvent.mData.as<int64_t>(); + mPlaybackStatistics.Start(); + break; + case MediaPlaybackEvent::PlaybackProgressed: { + int64_t newPos = aEvent.mData.as<int64_t>(); + mPlaybackStatistics.AddBytes(newPos - mPlaybackPosition); + mPlaybackPosition = newPos; + break; + } + case MediaPlaybackEvent::PlaybackStopped: { + int64_t newPos = aEvent.mData.as<int64_t>(); + mPlaybackStatistics.AddBytes(newPos - mPlaybackPosition); + mPlaybackPosition = newPos; + mPlaybackStatistics.Stop(); + break; + } + default: + break; + } + MediaDecoder::OnPlaybackEvent(std::move(aEvent)); +} + +void ChannelMediaDecoder::DurationChanged() { + MOZ_ASSERT(NS_IsMainThread()); + MediaDecoder::DurationChanged(); + // Duration has changed so we should recompute playback rate + nsCOMPtr<nsIRunnable> r = NS_NewRunnableFunction( + "ChannelMediaDecoder::UpdatePlaybackRate", + [stats = mPlaybackStatistics, res = RefPtr<BaseMediaResource>(mResource), + duration = mDuration]() { + auto rate = ComputePlaybackRate(stats, res, + duration.match(DurationToTimeUnit())); + UpdatePlaybackRate(rate, res); + }); + nsresult rv = GetStateMachine()->OwnerThread()->Dispatch(r.forget()); + MOZ_DIAGNOSTIC_ASSERT(NS_SUCCEEDED(rv)); + Unused << rv; +} + +void ChannelMediaDecoder::DownloadProgressed() { + MOZ_ASSERT(NS_IsMainThread()); + MOZ_DIAGNOSTIC_ASSERT(!IsShutdown()); + + GetOwner()->DownloadProgressed(); + + using StatsPromise = MozPromise<MediaStatistics, bool, true>; + InvokeAsync(GetStateMachine()->OwnerThread(), __func__, + [playbackStats = mPlaybackStatistics, + res = RefPtr<BaseMediaResource>(mResource), duration = mDuration, + pos = mPlaybackPosition]() { + auto rate = ComputePlaybackRate( + playbackStats, res, duration.match(DurationToTimeUnit())); + UpdatePlaybackRate(rate, res); + MediaStatistics stats = GetStatistics(rate, res, pos); + return StatsPromise::CreateAndResolve(stats, __func__); + }) + ->Then( + mAbstractMainThread, __func__, + [=, + self = RefPtr<ChannelMediaDecoder>(this)](MediaStatistics aStats) { + if (IsShutdown()) { + return; + } + mCanPlayThrough = aStats.CanPlayThrough(); + GetStateMachine()->DispatchCanPlayThrough(mCanPlayThrough); + mResource->ThrottleReadahead(ShouldThrottleDownload(aStats)); + // Update readyState since mCanPlayThrough might have changed. + GetOwner()->UpdateReadyState(); + }, + []() { MOZ_ASSERT_UNREACHABLE("Promise not resolved"); }); +} + +/* static */ ChannelMediaDecoder::PlaybackRateInfo +ChannelMediaDecoder::ComputePlaybackRate(const MediaChannelStatistics& aStats, + BaseMediaResource* aResource, + const TimeUnit& aDuration) { + MOZ_ASSERT(!NS_IsMainThread()); + + int64_t length = aResource->GetLength(); + if (aDuration.IsValid() && !aDuration.IsInfinite() && + aDuration.IsPositive() && length >= 0 && + length / aDuration.ToSeconds() < UINT32_MAX) { + return {uint32_t(length / aDuration.ToSeconds()), true}; + } + + bool reliable = false; + uint32_t rate = aStats.GetRate(&reliable); + return {rate, reliable}; +} + +/* static */ +void ChannelMediaDecoder::UpdatePlaybackRate(const PlaybackRateInfo& aInfo, + BaseMediaResource* aResource) { + MOZ_ASSERT(!NS_IsMainThread()); + + uint32_t rate = aInfo.mRate; + + if (aInfo.mReliable) { + // Avoid passing a zero rate + rate = std::max(rate, 1u); + } else { + // Set a minimum rate of 10,000 bytes per second ... sometimes we just + // don't have good data + rate = std::max(rate, 10000u); + } + + aResource->SetPlaybackRate(rate); +} + +/* static */ +MediaStatistics ChannelMediaDecoder::GetStatistics( + const PlaybackRateInfo& aInfo, BaseMediaResource* aRes, + int64_t aPlaybackPosition) { + MOZ_ASSERT(!NS_IsMainThread()); + + MediaStatistics result; + result.mDownloadRate = aRes->GetDownloadRate(&result.mDownloadRateReliable); + result.mDownloadPosition = aRes->GetCachedDataEnd(aPlaybackPosition); + result.mTotalBytes = aRes->GetLength(); + result.mPlaybackRate = aInfo.mRate; + result.mPlaybackRateReliable = aInfo.mReliable; + result.mPlaybackPosition = aPlaybackPosition; + return result; +} + +bool ChannelMediaDecoder::ShouldThrottleDownload( + const MediaStatistics& aStats) { + // We throttle the download if either the throttle override pref is set + // (so that we always throttle at the readahead limit on mobile if using + // a cellular network) or if the download is fast enough that there's no + // concern about playback being interrupted. + MOZ_ASSERT(NS_IsMainThread()); + NS_ENSURE_TRUE(GetStateMachine(), false); + + int64_t length = aStats.mTotalBytes; + if (length > 0 && + length <= int64_t(StaticPrefs::media_memory_cache_max_size()) * 1024) { + // Don't throttle the download of small resources. This is to speed + // up seeking, as seeks into unbuffered ranges would require starting + // up a new HTTP transaction, which adds latency. + return false; + } + + if (OnCellularConnection() && + Preferences::GetBool( + "media.throttle-cellular-regardless-of-download-rate", false)) { + return true; + } + + if (!aStats.mDownloadRateReliable || !aStats.mPlaybackRateReliable) { + return false; + } + uint32_t factor = + std::max(2u, Preferences::GetUint("media.throttle-factor", 2)); + return aStats.mDownloadRate > factor * aStats.mPlaybackRate; +} + +void ChannelMediaDecoder::AddSizeOfResources(ResourceSizes* aSizes) { + MOZ_ASSERT(NS_IsMainThread()); + if (mResource) { + aSizes->mByteSize += mResource->SizeOfIncludingThis(aSizes->mMallocSizeOf); + } +} + +already_AddRefed<nsIPrincipal> ChannelMediaDecoder::GetCurrentPrincipal() { + MOZ_ASSERT(NS_IsMainThread()); + return mResource ? mResource->GetCurrentPrincipal() : nullptr; +} + +bool ChannelMediaDecoder::HadCrossOriginRedirects() { + MOZ_ASSERT(NS_IsMainThread()); + return mResource ? mResource->HadCrossOriginRedirects() : false; +} + +bool ChannelMediaDecoder::IsTransportSeekable() { + MOZ_ASSERT(NS_IsMainThread()); + return mResource->IsTransportSeekable(); +} + +void ChannelMediaDecoder::SetLoadInBackground(bool aLoadInBackground) { + MOZ_ASSERT(NS_IsMainThread()); + if (mResource) { + mResource->SetLoadInBackground(aLoadInBackground); + } +} + +void ChannelMediaDecoder::Suspend() { + MOZ_ASSERT(NS_IsMainThread()); + if (mResource) { + mResource->Suspend(true); + } + MediaDecoder::Suspend(); +} + +void ChannelMediaDecoder::Resume() { + MOZ_ASSERT(NS_IsMainThread()); + if (mResource) { + mResource->Resume(); + } + MediaDecoder::Resume(); +} + +void ChannelMediaDecoder::MetadataLoaded( + UniquePtr<MediaInfo> aInfo, UniquePtr<MetadataTags> aTags, + MediaDecoderEventVisibility aEventVisibility) { + MediaDecoder::MetadataLoaded(std::move(aInfo), std::move(aTags), + aEventVisibility); + // Set mode to PLAYBACK after reading metadata. + mResource->SetReadMode(MediaCacheStream::MODE_PLAYBACK); +} + +void ChannelMediaDecoder::GetDebugInfo(dom::MediaDecoderDebugInfo& aInfo) { + MediaDecoder::GetDebugInfo(aInfo); + if (mResource) { + mResource->GetDebugInfo(aInfo.mResource); + } +} + +} // namespace mozilla + +// avoid redefined macro in unified build +#undef LOG |