/* -*- 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 "mozilla/dom/HTMLVideoElement.h"

#include "mozilla/dom/HTMLVideoElementBinding.h"

#include "nsGenericHTMLElement.h"

#include "nsGkAtoms.h"

#include "nsSize.h"

#include "nsError.h"

#include "nsNodeInfoManager.h"

#include "plbase64.h"

#include "prlock.h"

#include "nsThreadUtils.h"

#include "ImageContainer.h"

#include "VideoFrameContainer.h"

#include "nsIScriptSecurityManager.h"

#include "nsIXPConnect.h"

#include "nsITimer.h"

#include "FrameStatistics.h"

#include "MediaError.h"

#include "MediaDecoder.h"

#include "mozilla/Preferences.h"

#include "mozilla/dom/WakeLock.h"

#include "mozilla/dom/power/PowerManagerService.h"

#include "mozilla/dom/Performance.h"

#include "mozilla/dom/TimeRanges.h"

#include "mozilla/dom/VideoPlaybackQuality.h"

#include <algorithm>

#include <limits>

NS_IMPL_NS_NEW_HTML_ELEMENT(Video)

namespace mozilla {

namespace dom {

static bool sVideoStatsEnabled;

NS_IMPL_ELEMENT_CLONE(HTMLVideoElement)

HTMLVideoElement::HTMLVideoElement(already_AddRefed<NodeInfo>&& aNodeInfo)

  : HTMLMediaElement(std::move(aNodeInfo))

  , mIsOrientationLocked(false)

{

  DecoderDoctorLogger::LogConstruction(this);

}

HTMLVideoElement::~HTMLVideoElement()

{

  DecoderDoctorLogger::LogDestruction(this);

}

nsresult HTMLVideoElement::GetVideoSize(nsIntSize* size)

{

  if (!mMediaInfo.HasVideo()) {

    return NS_ERROR_FAILURE;

  }

  if (mDisableVideo) {

    return NS_ERROR_FAILURE;

  }

  switch (mMediaInfo.mVideo.mRotation) {

    case VideoInfo::Rotation::kDegree_90:

    case VideoInfo::Rotation::kDegree_270: {

      size->width = mMediaInfo.mVideo.mDisplay.height;

      size->height = mMediaInfo.mVideo.mDisplay.width;

      break;

    }

    case VideoInfo::Rotation::kDegree_0:

    case VideoInfo::Rotation::kDegree_180:

    default: {

      size->height = mMediaInfo.mVideo.mDisplay.height;

      size->width = mMediaInfo.mVideo.mDisplay.width;

      break;

    }

  }

  return NS_OK;

}

bool

HTMLVideoElement::ParseAttribute(int32_t aNamespaceID,

                                 nsAtom* aAttribute,

                                 const nsAString& aValue,

                                 nsIPrincipal* aMaybeScriptedPrincipal,

                                 nsAttrValue& aResult)

{

   if (aAttribute == nsGkAtoms::width || aAttribute == nsGkAtoms::height) {

     return aResult.ParseSpecialIntValue(aValue);

   }

   return HTMLMediaElement::ParseAttribute(aNamespaceID, aAttribute, aValue,

                                           aMaybeScriptedPrincipal, aResult);

}

void

HTMLVideoElement::MapAttributesIntoRule(const nsMappedAttributes* aAttributes,

                                        MappedDeclarations& aDecls)

{

  nsGenericHTMLElement::MapImageSizeAttributesInto(aAttributes, aDecls);

  nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aDecls);

}

NS_IMETHODIMP_(bool)

HTMLVideoElement::IsAttributeMapped(const nsAtom* aAttribute) const

{

  static const MappedAttributeEntry attributes[] = {

    { &nsGkAtoms::width },

    { &nsGkAtoms::height },

    { nullptr }

  };

  static const MappedAttributeEntry* const map[] = {

    attributes,

    sCommonAttributeMap

  };

  return FindAttributeDependence(aAttribute, map);

}

nsMapRuleToAttributesFunc

HTMLVideoElement::GetAttributeMappingFunction() const

{

  return &MapAttributesIntoRule;

}

nsresult HTMLVideoElement::SetAcceptHeader(nsIHttpChannel* aChannel)

{

  nsAutoCString value(

      "video/webm,"

      "video/ogg,"

      "video/*;q=0.9,"

      "application/ogg;q=0.7,"

      "audio/*;q=0.6,*/*;q=0.5");

  return aChannel->SetRequestHeader(NS_LITERAL_CSTRING("Accept"),

                                    value,

                                    false);

}

bool

HTMLVideoElement::IsInteractiveHTMLContent(bool aIgnoreTabindex) const

{

  return HasAttr(kNameSpaceID_None, nsGkAtoms::controls) ||

         HTMLMediaElement::IsInteractiveHTMLContent(aIgnoreTabindex);

}

uint32_t HTMLVideoElement::MozParsedFrames() const

{

  MOZ_ASSERT(NS_IsMainThread(), "Should be on main thread.");

  if (!IsVideoStatsEnabled()) {

    return 0;

  }

  if (nsContentUtils::ShouldResistFingerprinting(OwnerDoc())) {

    return nsRFPService::GetSpoofedTotalFrames(TotalPlayTime());

  }

  return mDecoder ? mDecoder->GetFrameStatistics().GetParsedFrames() : 0;

}

uint32_t HTMLVideoElement::MozDecodedFrames() const

{

  MOZ_ASSERT(NS_IsMainThread(), "Should be on main thread.");

  if (!IsVideoStatsEnabled()) {

    return 0;

  }

  if (nsContentUtils::ShouldResistFingerprinting(OwnerDoc())) {

    return nsRFPService::GetSpoofedTotalFrames(TotalPlayTime());

  }

  return mDecoder ? mDecoder->GetFrameStatistics().GetDecodedFrames() : 0;

}

uint32_t HTMLVideoElement::MozPresentedFrames() const

{

  MOZ_ASSERT(NS_IsMainThread(), "Should be on main thread.");

  if (!IsVideoStatsEnabled()) {

    return 0;

  }

  if (nsContentUtils::ShouldResistFingerprinting(OwnerDoc())) {

    return nsRFPService::GetSpoofedPresentedFrames(TotalPlayTime(), VideoWidth(), VideoHeight());

  }

  return mDecoder ? mDecoder->GetFrameStatistics().GetPresentedFrames() : 0;

}

uint32_t HTMLVideoElement::MozPaintedFrames()

{

  MOZ_ASSERT(NS_IsMainThread(), "Should be on main thread.");

  if (!IsVideoStatsEnabled()) {

    return 0;

  }

  if (nsContentUtils::ShouldResistFingerprinting(OwnerDoc())) {

    return nsRFPService::GetSpoofedPresentedFrames(TotalPlayTime(), VideoWidth(), VideoHeight());

  }

  layers::ImageContainer* container = GetImageContainer();

  return container ? container->GetPaintCount() : 0;

}

double HTMLVideoElement::MozFrameDelay()

{

  MOZ_ASSERT(NS_IsMainThread(), "Should be on main thread.");

  if (!IsVideoStatsEnabled() ||

      nsContentUtils::ShouldResistFingerprinting(OwnerDoc())) {

    return 0.0;

  }

  VideoFrameContainer* container = GetVideoFrameContainer();

  // Hide negative delays. Frame timing tweaks in the compositor (e.g.

  // adding a bias value to prevent multiple dropped/duped frames when

  // frame times are aligned with composition times) may produce apparent

  // negative delay, but we shouldn't report that.

  return container ? std::max(0.0, container->GetFrameDelay()) : 0.0;

}

bool HTMLVideoElement::MozHasAudio() const

{

  MOZ_ASSERT(NS_IsMainThread(), "Should be on main thread.");

  return HasAudio();

}

JSObject*

HTMLVideoElement::WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)

{

  return HTMLVideoElement_Binding::Wrap(aCx, this, aGivenProto);

}

FrameStatistics*

HTMLVideoElement::GetFrameStatistics()

{

  return mDecoder ? &(mDecoder->GetFrameStatistics()) : nullptr;

}

already_AddRefed<VideoPlaybackQuality>

HTMLVideoElement::GetVideoPlaybackQuality()

{

  DOMHighResTimeStamp creationTime = 0;

  uint32_t totalFrames = 0;

  uint32_t droppedFrames = 0;

  uint32_t corruptedFrames = 0;

  if (IsVideoStatsEnabled()) {

    if (nsPIDOMWindowInner* window = OwnerDoc()->GetInnerWindow()) {

      Performance* perf = window->GetPerformance();

      if (perf) {

        creationTime = perf->Now();

      }

    }

    if (mDecoder) {

      if (nsContentUtils::ShouldResistFingerprinting(OwnerDoc())) {

        totalFrames = nsRFPService::GetSpoofedTotalFrames(TotalPlayTime());

        droppedFrames = nsRFPService::GetSpoofedDroppedFrames(TotalPlayTime(),

                                                              VideoWidth(),

                                                              VideoHeight());

        corruptedFrames = 0;

      } else {

        FrameStatisticsData stats =

          mDecoder->GetFrameStatistics().GetFrameStatisticsData();

        if (sizeof(totalFrames) >= sizeof(stats.mParsedFrames)) {

          totalFrames = stats.mPresentedFrames + stats.mDroppedFrames;

          droppedFrames = stats.mDroppedFrames;

        } else {

          uint64_t total = stats.mPresentedFrames + stats.mDroppedFrames;

          const auto maxNumber = std::numeric_limits<uint32_t>::max();

          if (total <= maxNumber) {

            totalFrames = uint32_t(total);

            droppedFrames = uint32_t(stats.mDroppedFrames);

          } else {

            // Too big number(s) -> Resize everything to fit in 32 bits.

            double ratio = double(maxNumber) / double(total);

            totalFrames = maxNumber; // === total * ratio

            droppedFrames = uint32_t(double(stats.mDroppedFrames) * ratio);

          }

        }

        corruptedFrames = 0;

      }

    }

  }

  RefPtr<VideoPlaybackQuality> playbackQuality =

    new VideoPlaybackQuality(this, creationTime, totalFrames, droppedFrames,

                             corruptedFrames);

  return playbackQuality.forget();

}

void

HTMLVideoElement::WakeLockCreate()

{

  HTMLMediaElement::WakeLockCreate();

  UpdateScreenWakeLock();

}

void

HTMLVideoElement::WakeLockRelease()

{

  UpdateScreenWakeLock();

  HTMLMediaElement::WakeLockRelease();

}

void

HTMLVideoElement::UpdateScreenWakeLock()

{

  if (mScreenWakeLock && mPaused) {

    ErrorResult rv;

    mScreenWakeLock->Unlock(rv);

    rv.SuppressException();

    mScreenWakeLock = nullptr;

    return;

  }

  if (!mScreenWakeLock && !mPaused && HasVideo()) {

    RefPtr<power::PowerManagerService> pmService =

      power::PowerManagerService::GetInstance();

    NS_ENSURE_TRUE_VOID(pmService);

    ErrorResult rv;

    mScreenWakeLock = pmService->NewWakeLock(NS_LITERAL_STRING("video-playing"),

                                             OwnerDoc()->GetInnerWindow(),

                                             rv);

  }

}

void

HTMLVideoElement::Init()

{

  Preferences::AddBoolVarCache(&sVideoStatsEnabled, "media.video_stats.enabled");

}

/* static */

bool

HTMLVideoElement::IsVideoStatsEnabled()

{

  return sVideoStatsEnabled;

}

double

HTMLVideoElement::TotalPlayTime() const

{

  double total = 0.0;

  if (mPlayed) {

    uint32_t timeRangeCount = mPlayed->Length();

    for (uint32_t i = 0; i < timeRangeCount; i++) {

      double begin = mPlayed->Start(i);

      double end = mPlayed->End(i);

      total += end - begin;

    }

    if (mCurrentPlayRangeStart != -1.0) {

      double now = CurrentTime();

      if (mCurrentPlayRangeStart != now) {

        total += now - mCurrentPlayRangeStart;

      }

    }

  }

  return total;

}

} // namespace dom

} // namespace mozilla