From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 21:33:14 +0200
Subject: Adding upstream version 115.7.0esr.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 dom/media/webcodecs/VideoFrame.cpp | 2391 ++++++++++++++++++++++++++++++++++++
 1 file changed, 2391 insertions(+)
 create mode 100644 dom/media/webcodecs/VideoFrame.cpp

(limited to 'dom/media/webcodecs/VideoFrame.cpp')

diff --git a/dom/media/webcodecs/VideoFrame.cpp b/dom/media/webcodecs/VideoFrame.cpp
new file mode 100644
index 0000000000..b6b88e9b1e
--- /dev/null
+++ b/dom/media/webcodecs/VideoFrame.cpp
@@ -0,0 +1,2391 @@
+/* -*- 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 "mozilla/dom/VideoFrame.h"
+#include "mozilla/dom/VideoFrameBinding.h"
+
+#include <math.h>
+#include <limits>
+#include <utility>
+
+#include "ImageContainer.h"
+#include "VideoColorSpace.h"
+#include "js/StructuredClone.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/Result.h"
+#include "mozilla/ResultVariant.h"
+#include "mozilla/ScopeExit.h"
+
+#include "mozilla/UniquePtr.h"
+#include "mozilla/dom/CanvasUtils.h"
+#include "mozilla/dom/DOMRect.h"
+#include "mozilla/dom/HTMLCanvasElement.h"
+#include "mozilla/dom/HTMLImageElement.h"
+#include "mozilla/dom/HTMLVideoElement.h"
+#include "mozilla/dom/ImageBitmap.h"
+#include "mozilla/dom/ImageUtils.h"
+#include "mozilla/dom/OffscreenCanvas.h"
+#include "mozilla/dom/Promise.h"
+#include "mozilla/dom/SVGImageElement.h"
+#include "mozilla/dom/StructuredCloneHolder.h"
+#include "mozilla/dom/StructuredCloneTags.h"
+#include "mozilla/dom/UnionTypes.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/Swizzle.h"
+#include "nsLayoutUtils.h"
+#include "nsIPrincipal.h"
+#include "nsIURI.h"
+
+namespace mozilla::dom {
+
+// Only needed for refcounted objects.
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(VideoFrame, mParent)
+NS_IMPL_CYCLE_COLLECTING_ADDREF(VideoFrame)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(VideoFrame)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(VideoFrame)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+/*
+ * The below are helpers to operate ArrayBuffer or ArrayBufferView.
+ */
+template <class T>
+static Result<Span<uint8_t>, nsresult> GetArrayBufferData(const T& aBuffer) {
+  // Get buffer's data and length before using it.
+  aBuffer.ComputeState();
+
+  CheckedInt<size_t> byteLength(sizeof(typename T::element_type));
+  byteLength *= aBuffer.Length();
+  if (!byteLength.isValid()) {
+    return Err(NS_ERROR_INVALID_ARG);
+  }
+
+  return Span<uint8_t>(aBuffer.Data(), byteLength.value());
+}
+
+static Result<Span<uint8_t>, nsresult> GetSharedArrayBufferData(
+    const MaybeSharedArrayBufferViewOrMaybeSharedArrayBuffer& aBuffer) {
+  if (aBuffer.IsArrayBufferView()) {
+    return GetArrayBufferData(aBuffer.GetAsArrayBufferView());
+  }
+
+  MOZ_ASSERT(aBuffer.IsArrayBuffer());
+  return GetArrayBufferData(aBuffer.GetAsArrayBuffer());
+}
+
+/*
+ * The following are utilities to convert between VideoColorSpace values to
+ * gfx's values.
+ */
+
+static gfx::YUVColorSpace ToColorSpace(VideoMatrixCoefficients aMatrix) {
+  switch (aMatrix) {
+    case VideoMatrixCoefficients::Rgb:
+      return gfx::YUVColorSpace::Identity;
+    case VideoMatrixCoefficients::Bt709:
+    case VideoMatrixCoefficients::Bt470bg:
+      return gfx::YUVColorSpace::BT709;
+    case VideoMatrixCoefficients::Smpte170m:
+      return gfx::YUVColorSpace::BT601;
+    case VideoMatrixCoefficients::Bt2020_ncl:
+      return gfx::YUVColorSpace::BT2020;
+    case VideoMatrixCoefficients::EndGuard_:
+      break;
+  }
+  MOZ_ASSERT_UNREACHABLE("unsupported VideoMatrixCoefficients");
+  return gfx::YUVColorSpace::Default;
+}
+
+static gfx::TransferFunction ToTransferFunction(
+    VideoTransferCharacteristics aTransfer) {
+  switch (aTransfer) {
+    case VideoTransferCharacteristics::Bt709:
+    case VideoTransferCharacteristics::Smpte170m:
+      return gfx::TransferFunction::BT709;
+    case VideoTransferCharacteristics::Iec61966_2_1:
+      return gfx::TransferFunction::SRGB;
+    case VideoTransferCharacteristics::Pq:
+      return gfx::TransferFunction::PQ;
+    case VideoTransferCharacteristics::Hlg:
+      return gfx::TransferFunction::HLG;
+    case VideoTransferCharacteristics::Linear:
+    case VideoTransferCharacteristics::EndGuard_:
+      break;
+  }
+  MOZ_ASSERT_UNREACHABLE("unsupported VideoTransferCharacteristics");
+  return gfx::TransferFunction::Default;
+}
+
+static gfx::ColorSpace2 ToPrimaries(VideoColorPrimaries aPrimaries) {
+  switch (aPrimaries) {
+    case VideoColorPrimaries::Bt709:
+      return gfx::ColorSpace2::BT709;
+    case VideoColorPrimaries::Bt470bg:
+      return gfx::ColorSpace2::BT601_625;
+    case VideoColorPrimaries::Smpte170m:
+      return gfx::ColorSpace2::BT601_525;
+    case VideoColorPrimaries::Bt2020:
+      return gfx::ColorSpace2::BT2020;
+    case VideoColorPrimaries::Smpte432:
+      return gfx::ColorSpace2::DISPLAY_P3;
+    case VideoColorPrimaries::EndGuard_:
+      break;
+  }
+  MOZ_ASSERT_UNREACHABLE("unsupported VideoTransferCharacteristics");
+  return gfx::ColorSpace2::UNKNOWN;
+}
+
+static Maybe<VideoPixelFormat> ToVideoPixelFormat(gfx::SurfaceFormat aFormat) {
+  switch (aFormat) {
+    case gfx::SurfaceFormat::B8G8R8A8:
+      return Some(VideoPixelFormat::BGRA);
+    case gfx::SurfaceFormat::B8G8R8X8:
+      return Some(VideoPixelFormat::BGRX);
+    case gfx::SurfaceFormat::R8G8B8A8:
+      return Some(VideoPixelFormat::RGBA);
+    case gfx::SurfaceFormat::R8G8B8X8:
+      return Some(VideoPixelFormat::RGBX);
+    case gfx::SurfaceFormat::NV12:
+      return Some(VideoPixelFormat::NV12);
+    default:
+      break;
+  }
+  return Nothing();
+}
+
+static Maybe<VideoPixelFormat> ToVideoPixelFormat(ImageBitmapFormat aFormat) {
+  switch (aFormat) {
+    case ImageBitmapFormat::RGBA32:
+      return Some(VideoPixelFormat::RGBA);
+    case ImageBitmapFormat::BGRA32:
+      return Some(VideoPixelFormat::BGRA);
+    case ImageBitmapFormat::YUV444P:
+      return Some(VideoPixelFormat::I444);
+    case ImageBitmapFormat::YUV422P:
+      return Some(VideoPixelFormat::I422);
+    case ImageBitmapFormat::YUV420P:
+      return Some(VideoPixelFormat::I420);
+    case ImageBitmapFormat::YUV420SP_NV12:
+      return Some(VideoPixelFormat::NV12);
+    default:
+      break;
+  }
+  return Nothing();
+}
+
+/*
+ * The following are helpers to read the image data from the given buffer and
+ * the format. The data layout is illustrated in the comments for
+ * `VideoFrame::Format` below.
+ */
+
+static int32_t CeilingOfHalf(int32_t aValue) {
+  MOZ_ASSERT(aValue >= 0);
+  return aValue / 2 + (aValue % 2);
+}
+
+class YUVBufferReaderBase {
+ public:
+  YUVBufferReaderBase(const Span<uint8_t>& aBuffer, int32_t aWidth,
+                      int32_t aHeight)
+      : mWidth(aWidth), mHeight(aHeight), mStrideY(aWidth), mBuffer(aBuffer) {}
+  virtual ~YUVBufferReaderBase() = default;
+
+  const uint8_t* DataY() const { return mBuffer.data(); }
+  const int32_t mWidth;
+  const int32_t mHeight;
+  const int32_t mStrideY;
+
+ protected:
+  CheckedInt<size_t> YByteSize() const {
+    return CheckedInt<size_t>(mStrideY) * mHeight;
+  }
+
+  const Span<uint8_t> mBuffer;
+};
+
+class I420ABufferReader;
+class I420BufferReader : public YUVBufferReaderBase {
+ public:
+  I420BufferReader(const Span<uint8_t>& aBuffer, int32_t aWidth,
+                   int32_t aHeight)
+      : YUVBufferReaderBase(aBuffer, aWidth, aHeight),
+        mStrideU(CeilingOfHalf(aWidth)),
+        mStrideV(CeilingOfHalf(aWidth)) {}
+  virtual ~I420BufferReader() = default;
+
+  const uint8_t* DataU() const { return &mBuffer[YByteSize().value()]; }
+  const uint8_t* DataV() const {
+    return &mBuffer[YByteSize().value() + UByteSize().value()];
+  }
+  virtual I420ABufferReader* AsI420ABufferReader() { return nullptr; }
+
+  const int32_t mStrideU;
+  const int32_t mStrideV;
+
+ protected:
+  CheckedInt<size_t> UByteSize() const {
+    return CheckedInt<size_t>(CeilingOfHalf(mHeight)) * mStrideU;
+  }
+
+  CheckedInt<size_t> VSize() const {
+    return CheckedInt<size_t>(CeilingOfHalf(mHeight)) * mStrideV;
+  }
+};
+
+class I420ABufferReader final : public I420BufferReader {
+ public:
+  I420ABufferReader(const Span<uint8_t>& aBuffer, int32_t aWidth,
+                    int32_t aHeight)
+      : I420BufferReader(aBuffer, aWidth, aHeight), mStrideA(aWidth) {
+    MOZ_ASSERT(mStrideA == mStrideY);
+  }
+  virtual ~I420ABufferReader() = default;
+
+  const uint8_t* DataA() const {
+    return &mBuffer[YByteSize().value() + UByteSize().value() +
+                    VSize().value()];
+  }
+
+  virtual I420ABufferReader* AsI420ABufferReader() override { return this; }
+
+  const int32_t mStrideA;
+};
+
+class NV12BufferReader final : public YUVBufferReaderBase {
+ public:
+  NV12BufferReader(const Span<uint8_t>& aBuffer, int32_t aWidth,
+                   int32_t aHeight)
+      : YUVBufferReaderBase(aBuffer, aWidth, aHeight),
+        mStrideUV(aWidth + aWidth % 2) {}
+  virtual ~NV12BufferReader() = default;
+
+  const uint8_t* DataUV() const { return &mBuffer[YByteSize().value()]; }
+
+  const int32_t mStrideUV;
+};
+
+/*
+ * The followings are helpers defined in
+ * https://w3c.github.io/webcodecs/#videoframe-algorithms
+ */
+static bool IsSameOrigin(nsIGlobalObject* aGlobal, nsIURI* aURI) {
+  MOZ_ASSERT(aGlobal);
+
+  nsIPrincipal* principal = aGlobal->PrincipalOrNull();
+  // If VideoFrames is created in worker, then it's from the same origin. In
+  // this case, principal or aURI is null. Otherwise, check the origin.
+  return !principal || !aURI || principal->IsSameOrigin(aURI);
+}
+
+static bool IsSameOrigin(nsIGlobalObject* aGlobal, const VideoFrame& aFrame) {
+  MOZ_ASSERT(aGlobal);
+  MOZ_ASSERT(aFrame.GetParentObject());
+
+  nsIPrincipal* principalX = aGlobal->PrincipalOrNull();
+  nsIPrincipal* principalY = aFrame.GetParentObject()->PrincipalOrNull();
+
+  // If both of VideoFrames are created in worker, they are in the same origin
+  // domain.
+  if (!principalX) {
+    return !principalY;
+  }
+  // Otherwise, check their domains.
+  return principalX->Equals(principalY);
+}
+
+static bool IsSameOrigin(nsIGlobalObject* aGlobal,
+                         HTMLVideoElement& aVideoElement) {
+  MOZ_ASSERT(aGlobal);
+
+  // If CORS is in use, consider the video source is same-origin.
+  if (aVideoElement.GetCORSMode() != CORS_NONE) {
+    return true;
+  }
+
+  // Otherwise, check if video source has cross-origin redirect or not.
+  if (aVideoElement.HadCrossOriginRedirects()) {
+    return false;
+  }
+
+  // Finally, compare the VideoFrame's domain and video's one.
+  nsIPrincipal* principal = aGlobal->PrincipalOrNull();
+  nsCOMPtr<nsIPrincipal> elementPrincipal =
+      aVideoElement.GetCurrentVideoPrincipal();
+  // <video> cannot be created in worker, so it should have a valid principal.
+  if (NS_WARN_IF(!elementPrincipal) || !principal) {
+    return false;
+  }
+  return principal->Subsumes(elementPrincipal);
+}
+
+// A sub-helper to convert DOMRectInit to gfx::IntRect.
+static Result<gfx::IntRect, nsCString> ToIntRect(const DOMRectInit& aRectInit) {
+  auto EQ = [](const double& a, const double& b) {
+    constexpr double e = std::numeric_limits<double>::epsilon();
+    return std::fabs(a - b) <= e;
+  };
+  auto GT = [&](const double& a, const double& b) {
+    return !EQ(a, b) && a > b;
+  };
+
+  // Make sure the double values are in the gfx::IntRect's valid range, before
+  // checking the spec's valid range. The double's infinity value is larger than
+  // gfx::IntRect's max value so it will be filtered out here.
+  constexpr double MAX = static_cast<double>(
+      std::numeric_limits<decltype(gfx::IntRect::x)>::max());
+  constexpr double MIN = static_cast<double>(
+      std::numeric_limits<decltype(gfx::IntRect::x)>::min());
+  if (GT(aRectInit.mX, MAX) || GT(MIN, aRectInit.mX)) {
+    return Err(nsCString("x is out of the valid range"));
+  }
+  if (GT(aRectInit.mY, MAX) || GT(MIN, aRectInit.mY)) {
+    return Err(nsCString("y is out of the valid range"));
+  }
+  if (GT(aRectInit.mWidth, MAX) || GT(MIN, aRectInit.mWidth)) {
+    return Err(nsCString("width is out of the valid range"));
+  }
+  if (GT(aRectInit.mHeight, MAX) || GT(MIN, aRectInit.mHeight)) {
+    return Err(nsCString("height is out of the valid range"));
+  }
+
+  gfx::IntRect rect(
+      static_cast<decltype(gfx::IntRect::x)>(aRectInit.mX),
+      static_cast<decltype(gfx::IntRect::y)>(aRectInit.mY),
+      static_cast<decltype(gfx::IntRect::width)>(aRectInit.mWidth),
+      static_cast<decltype(gfx::IntRect::height)>(aRectInit.mHeight));
+  // Check the spec's valid range.
+  if (rect.X() < 0) {
+    return Err(nsCString("x must be non-negative"));
+  }
+  if (rect.Y() < 0) {
+    return Err(nsCString("y must be non-negative"));
+  }
+  if (rect.Width() <= 0) {
+    return Err(nsCString("width must be positive"));
+  }
+  if (rect.Height() <= 0) {
+    return Err(nsCString("height must be positive"));
+  }
+
+  return rect;
+}
+
+// A sub-helper to convert a (width, height) pair to gfx::IntRect.
+static Result<gfx::IntSize, nsCString> ToIntSize(const uint32_t& aWidth,
+                                                 const uint32_t& aHeight) {
+  // Make sure the given values are in the gfx::IntSize's valid range, before
+  // checking the spec's valid range.
+  constexpr uint32_t MAX = static_cast<uint32_t>(
+      std::numeric_limits<decltype(gfx::IntRect::width)>::max());
+  if (aWidth > MAX) {
+    return Err(nsCString("Width exceeds the implementation's range"));
+  }
+  if (aHeight > MAX) {
+    return Err(nsCString("Height exceeds the implementation's range"));
+  }
+
+  gfx::IntSize size(static_cast<decltype(gfx::IntRect::width)>(aWidth),
+                    static_cast<decltype(gfx::IntRect::height)>(aHeight));
+  // Check the spec's valid range.
+  if (size.Width() <= 0) {
+    return Err(nsCString("Width must be positive"));
+  }
+  if (size.Height() <= 0) {
+    return Err(nsCString("Height must be positive"));
+  }
+  return size;
+}
+
+// A sub-helper to make sure visible range is in the picture.
+static Result<Ok, nsCString> ValidateVisibility(
+    const gfx::IntRect& aVisibleRect, const gfx::IntSize& aPicSize) {
+  MOZ_ASSERT(aVisibleRect.X() >= 0);
+  MOZ_ASSERT(aVisibleRect.Y() >= 0);
+  MOZ_ASSERT(aVisibleRect.Width() > 0);
+  MOZ_ASSERT(aVisibleRect.Height() > 0);
+
+  const auto w = CheckedInt<uint32_t>(aVisibleRect.Width()) + aVisibleRect.X();
+  if (w.value() > static_cast<uint32_t>(aPicSize.Width())) {
+    return Err(nsCString(
+        "Sum of visible rectangle's x and width exceeds the picture's width"));
+  }
+
+  const auto h = CheckedInt<uint32_t>(aVisibleRect.Height()) + aVisibleRect.Y();
+  if (h.value() > static_cast<uint32_t>(aPicSize.Height())) {
+    return Err(
+        nsCString("Sum of visible rectangle's y and height exceeds the "
+                  "picture's height"));
+  }
+
+  return Ok();
+}
+
+// A sub-helper to check and get display{Width, Height} in
+// VideoFrame(Buffer)Init.
+template <class T>
+static Result<Maybe<gfx::IntSize>, nsCString> MaybeGetDisplaySize(
+    const T& aInit) {
+  if (aInit.mDisplayWidth.WasPassed() != aInit.mDisplayHeight.WasPassed()) {
+    return Err(nsCString(
+        "displayWidth and displayHeight cannot be set without the other"));
+  }
+
+  Maybe<gfx::IntSize> displaySize;
+  if (aInit.mDisplayWidth.WasPassed() && aInit.mDisplayHeight.WasPassed()) {
+    displaySize.emplace();
+    MOZ_TRY_VAR(displaySize.ref(), ToIntSize(aInit.mDisplayWidth.Value(),
+                                             aInit.mDisplayHeight.Value())
+                                       .mapErr([](nsCString error) {
+                                         error.Insert("display", 0);
+                                         return error;
+                                       }));
+  }
+  return displaySize;
+}
+
+// https://w3c.github.io/webcodecs/#valid-videoframebufferinit
+static Result<
+    std::tuple<gfx::IntSize, Maybe<gfx::IntRect>, Maybe<gfx::IntSize>>,
+    nsCString>
+ValidateVideoFrameBufferInit(const VideoFrameBufferInit& aInit) {
+  gfx::IntSize codedSize;
+  MOZ_TRY_VAR(codedSize, ToIntSize(aInit.mCodedWidth, aInit.mCodedHeight)
+                             .mapErr([](nsCString error) {
+                               error.Insert("coded", 0);
+                               return error;
+                             }));
+
+  Maybe<gfx::IntRect> visibleRect;
+  if (aInit.mVisibleRect.WasPassed()) {
+    visibleRect.emplace();
+    MOZ_TRY_VAR(
+        visibleRect.ref(),
+        ToIntRect(aInit.mVisibleRect.Value()).mapErr([](nsCString error) {
+          error.Insert("visibleRect's ", 0);
+          return error;
+        }));
+    MOZ_TRY(ValidateVisibility(visibleRect.ref(), codedSize));
+  }
+
+  Maybe<gfx::IntSize> displaySize;
+  MOZ_TRY_VAR(displaySize, MaybeGetDisplaySize(aInit));
+
+  return std::make_tuple(codedSize, visibleRect, displaySize);
+}
+
+// https://w3c.github.io/webcodecs/#videoframe-verify-rect-offset-alignment
+static Result<Ok, nsCString> VerifyRectOffsetAlignment(
+    const VideoFrame::Format& aFormat, const gfx::IntRect& aRect) {
+  for (const VideoFrame::Format::Plane& p : aFormat.Planes()) {
+    const gfx::IntSize sample = aFormat.SampleSize(p);
+    if (aRect.X() % sample.Width() != 0) {
+      return Err(nsCString("Mismatch between format and given left offset"));
+    }
+
+    if (aRect.Y() % sample.Height() != 0) {
+      return Err(nsCString("Mismatch between format and given top offset"));
+    }
+  }
+  return Ok();
+}
+
+// https://w3c.github.io/webcodecs/#videoframe-parse-visible-rect
+static Result<gfx::IntRect, nsCString> ParseVisibleRect(
+    const gfx::IntRect& aDefaultRect, const Maybe<gfx::IntRect>& aOverrideRect,
+    const gfx::IntSize& aCodedSize, const VideoFrame::Format& aFormat) {
+  MOZ_ASSERT(ValidateVisibility(aDefaultRect, aCodedSize).isOk());
+
+  gfx::IntRect rect = aDefaultRect;
+  if (aOverrideRect) {
+    // Skip checking overrideRect's width and height here. They should be
+    // checked before reaching here, and ValidateVisibility will assert it.
+
+    MOZ_TRY(ValidateVisibility(aOverrideRect.ref(), aCodedSize));
+    rect = *aOverrideRect;
+  }
+
+  MOZ_TRY(VerifyRectOffsetAlignment(aFormat, rect));
+
+  return rect;
+}
+
+// https://w3c.github.io/webcodecs/#computed-plane-layout
+struct ComputedPlaneLayout {
+  // The offset from the beginning of the buffer in one plane.
+  uint32_t mDestinationOffset = 0;
+  // The stride of the image data in one plane.
+  uint32_t mDestinationStride = 0;
+  // Sample count of picture's top offset (a.k.a samples of y).
+  uint32_t mSourceTop = 0;
+  // Sample count of the picture's height.
+  uint32_t mSourceHeight = 0;
+  // Byte count of the picture's left offset (a.k.a bytes of x).
+  uint32_t mSourceLeftBytes = 0;
+  // Byte count of the picture's width.
+  uint32_t mSourceWidthBytes = 0;
+};
+
+// https://w3c.github.io/webcodecs/#combined-buffer-layout
+struct CombinedBufferLayout {
+  CombinedBufferLayout() : mAllocationSize(0) {}
+  CombinedBufferLayout(uint32_t aAllocationSize,
+                       nsTArray<ComputedPlaneLayout>&& aLayout)
+      : mAllocationSize(aAllocationSize),
+        mComputedLayouts(std::move(aLayout)) {}
+  uint32_t mAllocationSize = 0;
+  nsTArray<ComputedPlaneLayout> mComputedLayouts;
+};
+
+// https://w3c.github.io/webcodecs/#videoframe-compute-layout-and-allocation-size
+static Result<CombinedBufferLayout, nsCString> ComputeLayoutAndAllocationSize(
+    const gfx::IntRect& aRect, const VideoFrame::Format& aFormat,
+    const Sequence<PlaneLayout>* aPlaneLayouts) {
+  nsTArray<VideoFrame::Format::Plane> planes = aFormat.Planes();
+
+  if (aPlaneLayouts && aPlaneLayouts->Length() != planes.Length()) {
+    return Err(nsCString("Mismatch between format and layout"));
+  }
+
+  uint32_t minAllocationSize = 0;
+  nsTArray<ComputedPlaneLayout> layouts;
+  nsTArray<uint32_t> endOffsets;
+
+  for (size_t i = 0; i < planes.Length(); ++i) {
+    const VideoFrame::Format::Plane& p = planes[i];
+    const gfx::IntSize sampleSize = aFormat.SampleSize(p);
+
+    // TODO: Spec here is wrong so we do differently:
+    // https://github.com/w3c/webcodecs/issues/511
+    // This comment should be removed once the issue is resolved.
+    ComputedPlaneLayout layout{
+        .mDestinationOffset = 0,
+        .mDestinationStride = 0,
+        .mSourceTop = (CheckedUint32(aRect.Y()) / sampleSize.Height()).value(),
+        .mSourceHeight =
+            (CheckedUint32(aRect.Height()) / sampleSize.Height()).value(),
+        .mSourceLeftBytes = (CheckedUint32(aRect.X()) / sampleSize.Width() *
+                             aFormat.SampleBytes(p))
+                                .value(),
+        .mSourceWidthBytes = (CheckedUint32(aRect.Width()) /
+                              sampleSize.Width() * aFormat.SampleBytes(p))
+                                 .value()};
+    if (aPlaneLayouts) {
+      const PlaneLayout& planeLayout = aPlaneLayouts->ElementAt(i);
+      if (planeLayout.mStride < layout.mSourceWidthBytes) {
+        return Err(nsPrintfCString("The stride in %s plane is too small",
+                                   aFormat.PlaneName(p)));
+      }
+      layout.mDestinationOffset = planeLayout.mOffset;
+      layout.mDestinationStride = planeLayout.mStride;
+    } else {
+      layout.mDestinationOffset = minAllocationSize;
+      layout.mDestinationStride = layout.mSourceWidthBytes;
+    }
+
+    const CheckedInt<uint32_t> planeSize =
+        CheckedInt<uint32_t>(layout.mDestinationStride) * layout.mSourceHeight;
+    if (!planeSize.isValid()) {
+      return Err(nsCString("Invalid layout with an over-sized plane"));
+    }
+    const CheckedInt<uint32_t> planeEnd = planeSize + layout.mDestinationOffset;
+    if (!planeEnd.isValid()) {
+      return Err(nsCString("Invalid layout with the out-out-bound offset"));
+    }
+    endOffsets.AppendElement(planeEnd.value());
+
+    minAllocationSize = std::max(minAllocationSize, planeEnd.value());
+
+    for (size_t j = 0; j < i; ++j) {
+      const ComputedPlaneLayout& earlier = layouts[j];
+      // If the current data's end is smaller or equal to the previous one's
+      // head, or if the previous data's end is smaller or equal to the current
+      // one's head, then they do not overlap. Otherwise, they do.
+      if (endOffsets[i] > earlier.mDestinationOffset &&
+          endOffsets[j] > layout.mDestinationOffset) {
+        return Err(nsCString("Invalid layout with the overlapped planes"));
+      }
+    }
+    layouts.AppendElement(layout);
+  }
+
+  return CombinedBufferLayout(minAllocationSize, std::move(layouts));
+}
+
+// https://w3c.github.io/webcodecs/#videoframe-verify-rect-size-alignment
+static Result<Ok, nsCString> VerifyRectSizeAlignment(
+    const VideoFrame::Format& aFormat, const gfx::IntRect& aRect) {
+  for (const VideoFrame::Format::Plane& p : aFormat.Planes()) {
+    const gfx::IntSize sample = aFormat.SampleSize(p);
+    if (aRect.Width() % sample.Width() != 0) {
+      return Err(nsCString("Mismatch between format and given rect's width"));
+    }
+
+    if (aRect.Height() % sample.Height() != 0) {
+      return Err(nsCString("Mismatch between format and given rect's height"));
+    }
+  }
+  return Ok();
+}
+
+// https://w3c.github.io/webcodecs/#videoframe-parse-videoframecopytooptions
+static Result<CombinedBufferLayout, nsCString> ParseVideoFrameCopyToOptions(
+    const VideoFrameCopyToOptions& aOptions, const gfx::IntRect& aVisibleRect,
+    const gfx::IntSize& aCodedSize, const VideoFrame::Format& aFormat) {
+  Maybe<gfx::IntRect> overrideRect;
+  if (aOptions.mRect.WasPassed()) {
+    // TODO: We handle some edge cases that spec misses:
+    // https://github.com/w3c/webcodecs/issues/513
+    // This comment should be removed once the issue is resolved.
+    overrideRect.emplace();
+    MOZ_TRY_VAR(overrideRect.ref(),
+                ToIntRect(aOptions.mRect.Value()).mapErr([](nsCString error) {
+                  error.Insert("rect's ", 0);
+                  return error;
+                }));
+
+    MOZ_TRY(VerifyRectSizeAlignment(aFormat, overrideRect.ref()));
+  }
+
+  gfx::IntRect parsedRect;
+  MOZ_TRY_VAR(parsedRect, ParseVisibleRect(aVisibleRect, overrideRect,
+                                           aCodedSize, aFormat));
+
+  const Sequence<PlaneLayout>* optLayout = nullptr;
+  if (aOptions.mLayout.WasPassed()) {
+    optLayout = &aOptions.mLayout.Value();
+  }
+
+  return ComputeLayoutAndAllocationSize(parsedRect, aFormat, optLayout);
+}
+
+static bool IsYUVFormat(const VideoPixelFormat& aFormat) {
+  switch (aFormat) {
+    case VideoPixelFormat::I420:
+    case VideoPixelFormat::I420A:
+    case VideoPixelFormat::I422:
+    case VideoPixelFormat::I444:
+    case VideoPixelFormat::NV12:
+      return true;
+    case VideoPixelFormat::RGBA:
+    case VideoPixelFormat::RGBX:
+    case VideoPixelFormat::BGRA:
+    case VideoPixelFormat::BGRX:
+      return false;
+    case VideoPixelFormat::EndGuard_:
+      MOZ_ASSERT_UNREACHABLE("unsupported format");
+  }
+  return false;
+}
+
+// https://w3c.github.io/webcodecs/#videoframe-pick-color-space
+static VideoColorSpaceInit PickColorSpace(
+    const VideoColorSpaceInit* aInitColorSpace,
+    const VideoPixelFormat& aFormat) {
+  VideoColorSpaceInit colorSpace;
+  if (aInitColorSpace) {
+    colorSpace = *aInitColorSpace;
+    // By spec, we MAY replace null members of aInitColorSpace with guessed
+    // values so we can always use these in CreateYUVImageFromBuffer.
+    if (IsYUVFormat(aFormat) && colorSpace.mMatrix.IsNull()) {
+      colorSpace.mMatrix.SetValue(VideoMatrixCoefficients::Bt709);
+    }
+    return colorSpace;
+  }
+
+  switch (aFormat) {
+    case VideoPixelFormat::I420:
+    case VideoPixelFormat::I420A:
+    case VideoPixelFormat::I422:
+    case VideoPixelFormat::I444:
+    case VideoPixelFormat::NV12:
+      // https://w3c.github.io/webcodecs/#rec709-color-space
+      colorSpace.mFullRange.SetValue(false);
+      colorSpace.mMatrix.SetValue(VideoMatrixCoefficients::Bt709);
+      colorSpace.mPrimaries.SetValue(VideoColorPrimaries::Bt709);
+      colorSpace.mTransfer.SetValue(VideoTransferCharacteristics::Bt709);
+      break;
+    case VideoPixelFormat::RGBA:
+    case VideoPixelFormat::RGBX:
+    case VideoPixelFormat::BGRA:
+    case VideoPixelFormat::BGRX:
+      // https://w3c.github.io/webcodecs/#srgb-color-space
+      colorSpace.mFullRange.SetValue(true);
+      colorSpace.mMatrix.SetValue(VideoMatrixCoefficients::Rgb);
+      colorSpace.mPrimaries.SetValue(VideoColorPrimaries::Bt709);
+      colorSpace.mTransfer.SetValue(VideoTransferCharacteristics::Iec61966_2_1);
+      break;
+    case VideoPixelFormat::EndGuard_:
+      MOZ_ASSERT_UNREACHABLE("unsupported format");
+  }
+
+  return colorSpace;
+}
+
+// https://w3c.github.io/webcodecs/#validate-videoframeinit
+static Result<std::pair<Maybe<gfx::IntRect>, Maybe<gfx::IntSize>>, nsCString>
+ValidateVideoFrameInit(const VideoFrameInit& aInit,
+                       const VideoFrame::Format& aFormat,
+                       const gfx::IntSize& aCodedSize) {
+  if (aCodedSize.Width() <= 0 || aCodedSize.Height() <= 0) {
+    return Err(nsCString("codedWidth and codedHeight must be positive"));
+  }
+
+  Maybe<gfx::IntRect> visibleRect;
+  if (aInit.mVisibleRect.WasPassed()) {
+    visibleRect.emplace();
+    MOZ_TRY_VAR(
+        visibleRect.ref(),
+        ToIntRect(aInit.mVisibleRect.Value()).mapErr([](nsCString error) {
+          error.Insert("visibleRect's ", 0);
+          return error;
+        }));
+    MOZ_TRY(ValidateVisibility(visibleRect.ref(), aCodedSize));
+
+    MOZ_TRY(VerifyRectOffsetAlignment(aFormat, visibleRect.ref()));
+  }
+
+  Maybe<gfx::IntSize> displaySize;
+  MOZ_TRY_VAR(displaySize, MaybeGetDisplaySize(aInit));
+
+  return std::make_pair(visibleRect, displaySize);
+}
+
+/*
+ * The followings are helpers to create a VideoFrame from a given buffer
+ */
+
+static Result<RefPtr<gfx::DataSourceSurface>, nsCString> AllocateBGRASurface(
+    gfx::DataSourceSurface* aSurface) {
+  MOZ_ASSERT(aSurface);
+
+  // Memory allocation relies on CreateDataSourceSurfaceWithStride so we still
+  // need to do this even if the format is SurfaceFormat::BGR{A, X}.
+
+  gfx::DataSourceSurface::ScopedMap surfaceMap(aSurface,
+                                               gfx::DataSourceSurface::READ);
+  if (!surfaceMap.IsMapped()) {
+    return Err(nsCString("The source surface is not readable"));
+  }
+
+  RefPtr<gfx::DataSourceSurface> bgraSurface =
+      gfx::Factory::CreateDataSourceSurfaceWithStride(
+          aSurface->GetSize(), gfx::SurfaceFormat::B8G8R8A8,
+          surfaceMap.GetStride());
+  if (!bgraSurface) {
+    return Err(nsCString("Failed to allocate a BGRA surface"));
+  }
+
+  gfx::DataSourceSurface::ScopedMap bgraMap(bgraSurface,
+                                            gfx::DataSourceSurface::WRITE);
+  if (!bgraMap.IsMapped()) {
+    return Err(nsCString("The allocated BGRA surface is not writable"));
+  }
+
+  gfx::SwizzleData(surfaceMap.GetData(), surfaceMap.GetStride(),
+                   aSurface->GetFormat(), bgraMap.GetData(),
+                   bgraMap.GetStride(), bgraSurface->GetFormat(),
+                   bgraSurface->GetSize());
+
+  return bgraSurface;
+}
+
+static Result<RefPtr<layers::Image>, nsCString> CreateImageFromRawData(
+    const gfx::IntSize& aSize, int32_t aStride, gfx::SurfaceFormat aFormat,
+    const Span<uint8_t>& aBuffer) {
+  MOZ_ASSERT(!aSize.IsEmpty());
+
+  // Wrap the source buffer into a DataSourceSurface.
+  RefPtr<gfx::DataSourceSurface> surface =
+      gfx::Factory::CreateWrappingDataSourceSurface(aBuffer.data(), aStride,
+                                                    aSize, aFormat);
+  if (!surface) {
+    return Err(nsCString("Failed to wrap the raw data into a surface"));
+  }
+
+  // Gecko favors BGRA so we convert surface into BGRA format first.
+  RefPtr<gfx::DataSourceSurface> bgraSurface;
+  MOZ_TRY_VAR(bgraSurface, AllocateBGRASurface(surface));
+  MOZ_ASSERT(bgraSurface);
+
+  return RefPtr<layers::Image>(
+      new layers::SourceSurfaceImage(bgraSurface.get()));
+}
+
+static Result<RefPtr<layers::Image>, nsCString> CreateRGBAImageFromBuffer(
+    const VideoFrame::Format& aFormat, const gfx::IntSize& aSize,
+    const Span<uint8_t>& aBuffer) {
+  const gfx::SurfaceFormat format = aFormat.ToSurfaceFormat();
+  MOZ_ASSERT(format == gfx::SurfaceFormat::R8G8B8A8 ||
+             format == gfx::SurfaceFormat::R8G8B8X8 ||
+             format == gfx::SurfaceFormat::B8G8R8A8 ||
+             format == gfx::SurfaceFormat::B8G8R8X8);
+  // TODO: Use aFormat.SampleBytes() instead?
+  CheckedInt<int32_t> stride(BytesPerPixel(format));
+  stride *= aSize.Width();
+  if (!stride.isValid()) {
+    return Err(nsCString("Image size exceeds implementation's limit"));
+  }
+  return CreateImageFromRawData(aSize, stride.value(), format, aBuffer);
+}
+
+static Result<RefPtr<layers::Image>, nsCString> CreateYUVImageFromBuffer(
+    const VideoFrame::Format& aFormat, const VideoColorSpaceInit& aColorSpace,
+    const gfx::IntSize& aSize, const Span<uint8_t>& aBuffer) {
+  if (aFormat.PixelFormat() == VideoPixelFormat::I420 ||
+      aFormat.PixelFormat() == VideoPixelFormat::I420A) {
+    UniquePtr<I420BufferReader> reader;
+    if (aFormat.PixelFormat() == VideoPixelFormat::I420) {
+      reader.reset(
+          new I420BufferReader(aBuffer, aSize.Width(), aSize.Height()));
+    } else {
+      reader.reset(
+          new I420ABufferReader(aBuffer, aSize.Width(), aSize.Height()));
+    }
+
+    layers::PlanarYCbCrData data;
+    data.mPictureRect = gfx::IntRect(0, 0, reader->mWidth, reader->mHeight);
+
+    // Y plane.
+    data.mYChannel = const_cast<uint8_t*>(reader->DataY());
+    data.mYStride = reader->mStrideY;
+    data.mYSkip = 0;
+    // Cb plane.
+    data.mCbChannel = const_cast<uint8_t*>(reader->DataU());
+    data.mCbSkip = 0;
+    // Cr plane.
+    data.mCrChannel = const_cast<uint8_t*>(reader->DataV());
+    data.mCbSkip = 0;
+    // A plane.
+    if (aFormat.PixelFormat() == VideoPixelFormat::I420A) {
+      data.mAlpha.emplace();
+      data.mAlpha->mChannel =
+          const_cast<uint8_t*>(reader->AsI420ABufferReader()->DataA());
+      data.mAlpha->mSize = data.mPictureRect.Size();
+      // No values for mDepth and mPremultiplied.
+    }
+
+    // CbCr plane vector.
+    MOZ_RELEASE_ASSERT(reader->mStrideU == reader->mStrideV);
+    data.mCbCrStride = reader->mStrideU;
+    data.mChromaSubsampling = gfx::ChromaSubsampling::HALF_WIDTH_AND_HEIGHT;
+    // Color settings.
+    if (!aColorSpace.mFullRange.IsNull() && aColorSpace.mFullRange.Value()) {
+      data.mColorRange = gfx::ColorRange::FULL;
+    }
+    MOZ_RELEASE_ASSERT(!aColorSpace.mMatrix.IsNull());
+    data.mYUVColorSpace = ToColorSpace(aColorSpace.mMatrix.Value());
+    if (!aColorSpace.mTransfer.IsNull()) {
+      data.mTransferFunction =
+          ToTransferFunction(aColorSpace.mTransfer.Value());
+    }
+    if (!aColorSpace.mPrimaries.IsNull()) {
+      data.mColorPrimaries = ToPrimaries(aColorSpace.mPrimaries.Value());
+    }
+
+    RefPtr<layers::PlanarYCbCrImage> image =
+        new layers::RecyclingPlanarYCbCrImage(new layers::BufferRecycleBin());
+    if (!image->CopyData(data)) {
+      return Err(nsPrintfCString(
+          "Failed to create I420%s image",
+          (aFormat.PixelFormat() == VideoPixelFormat::I420A ? "A" : "")));
+    }
+    // Manually cast type to make Result work.
+    return RefPtr<layers::Image>(image.forget());
+  }
+
+  if (aFormat.PixelFormat() == VideoPixelFormat::NV12) {
+    NV12BufferReader reader(aBuffer, aSize.Width(), aSize.Height());
+
+    layers::PlanarYCbCrData data;
+    data.mPictureRect = gfx::IntRect(0, 0, reader.mWidth, reader.mHeight);
+
+    // Y plane.
+    data.mYChannel = const_cast<uint8_t*>(reader.DataY());
+    data.mYStride = reader.mStrideY;
+    data.mYSkip = 0;
+    // Cb plane.
+    data.mCbChannel = const_cast<uint8_t*>(reader.DataUV());
+    data.mCbSkip = 1;
+    // Cr plane.
+    data.mCrChannel = data.mCbChannel + 1;
+    data.mCrSkip = 1;
+    // CbCr plane vector.
+    data.mCbCrStride = reader.mStrideUV;
+    data.mChromaSubsampling = gfx::ChromaSubsampling::HALF_WIDTH_AND_HEIGHT;
+    // Color settings.
+    if (!aColorSpace.mFullRange.IsNull() && aColorSpace.mFullRange.Value()) {
+      data.mColorRange = gfx::ColorRange::FULL;
+    }
+    MOZ_RELEASE_ASSERT(!aColorSpace.mMatrix.IsNull());
+    data.mYUVColorSpace = ToColorSpace(aColorSpace.mMatrix.Value());
+    if (!aColorSpace.mTransfer.IsNull()) {
+      data.mTransferFunction =
+          ToTransferFunction(aColorSpace.mTransfer.Value());
+    }
+    if (!aColorSpace.mPrimaries.IsNull()) {
+      data.mColorPrimaries = ToPrimaries(aColorSpace.mPrimaries.Value());
+    }
+
+    RefPtr<layers::NVImage> image = new layers::NVImage();
+    if (!image->SetData(data)) {
+      return Err(nsCString("Failed to create NV12 image"));
+    }
+    // Manually cast type to make Result work.
+    return RefPtr<layers::Image>(image.forget());
+  }
+
+  return Err(nsCString("Unsupported image format"));
+}
+
+static Result<RefPtr<layers::Image>, nsCString> CreateImageFromBuffer(
+    const VideoFrame::Format& aFormat, const VideoColorSpaceInit& aColorSpace,
+    const gfx::IntSize& aSize, const Span<uint8_t>& aBuffer) {
+  switch (aFormat.PixelFormat()) {
+    case VideoPixelFormat::I420:
+    case VideoPixelFormat::I420A:
+    case VideoPixelFormat::NV12:
+      return CreateYUVImageFromBuffer(aFormat, aColorSpace, aSize, aBuffer);
+    case VideoPixelFormat::I422:
+    case VideoPixelFormat::I444:
+      // Not yet support for now.
+      break;
+    case VideoPixelFormat::RGBA:
+    case VideoPixelFormat::RGBX:
+    case VideoPixelFormat::BGRA:
+    case VideoPixelFormat::BGRX:
+      return CreateRGBAImageFromBuffer(aFormat, aSize, aBuffer);
+    case VideoPixelFormat::EndGuard_:
+      MOZ_ASSERT_UNREACHABLE("unsupported format");
+  }
+  return Err(nsCString("Invalid image format"));
+}
+
+// https://w3c.github.io/webcodecs/#dom-videoframe-videoframe-data-init
+template <class T>
+static Result<RefPtr<VideoFrame>, nsCString> CreateVideoFrameFromBuffer(
+    nsIGlobalObject* aGlobal, const T& aBuffer,
+    const VideoFrameBufferInit& aInit) {
+  if (aInit.mColorSpace.WasPassed() &&
+      !aInit.mColorSpace.Value().mTransfer.IsNull() &&
+      aInit.mColorSpace.Value().mTransfer.Value() ==
+          VideoTransferCharacteristics::Linear) {
+    return Err(nsCString("linear RGB is not supported"));
+  }
+
+  std::tuple<gfx::IntSize, Maybe<gfx::IntRect>, Maybe<gfx::IntSize>> init;
+  MOZ_TRY_VAR(init, ValidateVideoFrameBufferInit(aInit));
+  gfx::IntSize codedSize = std::get<0>(init);
+  Maybe<gfx::IntRect> visibleRect = std::get<1>(init);
+  Maybe<gfx::IntSize> displaySize = std::get<2>(init);
+
+  VideoFrame::Format format(aInit.mFormat);
+  // TODO: Spec doesn't ask for this in ctor but Pixel Format does. See
+  // https://github.com/w3c/webcodecs/issues/512
+  // This comment should be removed once the issue is resolved.
+  if (!format.IsValidSize(codedSize)) {
+    return Err(nsCString("coded width and/or height is invalid"));
+  }
+
+  gfx::IntRect parsedRect;
+  MOZ_TRY_VAR(parsedRect, ParseVisibleRect(gfx::IntRect({0, 0}, codedSize),
+                                           visibleRect, codedSize, format));
+
+  const Sequence<PlaneLayout>* optLayout = nullptr;
+  if (aInit.mLayout.WasPassed()) {
+    optLayout = &aInit.mLayout.Value();
+  }
+
+  CombinedBufferLayout combinedLayout;
+  MOZ_TRY_VAR(combinedLayout,
+              ComputeLayoutAndAllocationSize(parsedRect, format, optLayout));
+
+  Span<uint8_t> buffer;
+  MOZ_TRY_VAR(buffer, GetArrayBufferData(aBuffer).mapErr([](nsresult aError) {
+    return nsPrintfCString("Failed to get buffer data: %x",
+                           static_cast<uint32_t>(aError));
+  }));
+
+  if (buffer.size_bytes() <
+      static_cast<size_t>(combinedLayout.mAllocationSize)) {
+    return Err(nsCString("data is too small"));
+  }
+
+  // TODO: If codedSize is (3, 3) and visibleRect is (0, 0, 1, 1) but the data
+  // is 2 x 2 RGBA buffer (2 x 2 x 4 bytes), it pass the above check. In this
+  // case, we can crop it to a 1 x 1-codedSize image (Bug 1782128).
+  if (buffer.size_bytes() < format.SampleCount(codedSize)) {  // 1 byte/sample
+    return Err(nsCString("data is too small"));
+  }
+
+  // By spec, we should set visible* here. But if we don't change the image,
+  // visible* is same as parsedRect here. The display{Width, Height} is
+  // visible{Width, Height} if it's not set.
+
+  Maybe<uint64_t> duration =
+      aInit.mDuration.WasPassed() ? Some(aInit.mDuration.Value()) : Nothing();
+
+  VideoColorSpaceInit colorSpace = PickColorSpace(
+      aInit.mColorSpace.WasPassed() ? &aInit.mColorSpace.Value() : nullptr,
+      aInit.mFormat);
+
+  RefPtr<layers::Image> data;
+  MOZ_TRY_VAR(data,
+              CreateImageFromBuffer(format, colorSpace, codedSize, buffer));
+  MOZ_ASSERT(data);
+  MOZ_ASSERT(data->GetSize() == codedSize);
+
+  // TODO: Spec should assign aInit.mFormat to inner format value:
+  // https://github.com/w3c/webcodecs/issues/509.
+  // This comment should be removed once the issue is resolved.
+  return MakeRefPtr<VideoFrame>(aGlobal, data, aInit.mFormat, codedSize,
+                                parsedRect,
+                                displaySize ? *displaySize : parsedRect.Size(),
+                                duration, aInit.mTimestamp, colorSpace);
+}
+
+template <class T>
+static already_AddRefed<VideoFrame> CreateVideoFrameFromBuffer(
+    const GlobalObject& aGlobal, const T& aBuffer,
+    const VideoFrameBufferInit& aInit, ErrorResult& aRv) {
+  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
+  if (!global) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return nullptr;
+  }
+
+  auto r = CreateVideoFrameFromBuffer(global, aBuffer, aInit);
+  if (r.isErr()) {
+    aRv.ThrowTypeError(r.unwrapErr());
+    return nullptr;
+  }
+  return r.unwrap().forget();
+}
+
+// https://w3c.github.io/webcodecs/#videoframe-initialize-visible-rect-and-display-size
+static void InitializeVisibleRectAndDisplaySize(
+    Maybe<gfx::IntRect>& aVisibleRect, Maybe<gfx::IntSize>& aDisplaySize,
+    gfx::IntRect aDefaultVisibleRect, gfx::IntSize aDefaultDisplaySize) {
+  if (!aVisibleRect) {
+    aVisibleRect.emplace(aDefaultVisibleRect);
+  }
+  if (!aDisplaySize) {
+    double wScale = static_cast<double>(aDefaultDisplaySize.Width()) /
+                    aDefaultVisibleRect.Width();
+    double hScale = static_cast<double>(aDefaultDisplaySize.Height()) /
+                    aDefaultVisibleRect.Height();
+    double w = wScale * aVisibleRect->Width();
+    double h = hScale * aVisibleRect->Height();
+    aDisplaySize.emplace(gfx::IntSize(static_cast<uint32_t>(round(w)),
+                                      static_cast<uint32_t>(round(h))));
+  }
+}
+
+// https://w3c.github.io/webcodecs/#videoframe-initialize-frame-with-resource-and-size
+static Result<already_AddRefed<VideoFrame>, nsCString>
+InitializeFrameWithResourceAndSize(
+    nsIGlobalObject* aGlobal, const VideoFrameInit& aInit,
+    already_AddRefed<layers::SourceSurfaceImage> aImage) {
+  MOZ_ASSERT(aInit.mTimestamp.WasPassed());
+
+  RefPtr<layers::SourceSurfaceImage> image(aImage);
+  MOZ_ASSERT(image);
+
+  RefPtr<gfx::SourceSurface> surface = image->GetAsSourceSurface();
+  Maybe<VideoFrame::Format> format =
+      ToVideoPixelFormat(surface->GetFormat())
+          .map([](const VideoPixelFormat& aFormat) {
+            return VideoFrame::Format(aFormat);
+          });
+  // TODO: Handle `ToVideoPixelFormat` failure.
+  if (NS_WARN_IF(!format)) {
+    return Err(nsCString("This image has unsupport format"));
+  }
+
+  std::pair<Maybe<gfx::IntRect>, Maybe<gfx::IntSize>> init;
+  MOZ_TRY_VAR(init,
+              ValidateVideoFrameInit(aInit, format.ref(), image->GetSize()));
+  Maybe<gfx::IntRect> visibleRect = init.first;
+  Maybe<gfx::IntSize> displaySize = init.second;
+
+  if (aInit.mAlpha == AlphaOption::Discard) {
+    format->MakeOpaque();
+    // Keep the alpha data in image for now until it's being rendered.
+  }
+
+  InitializeVisibleRectAndDisplaySize(visibleRect, displaySize,
+                                      gfx::IntRect({0, 0}, image->GetSize()),
+                                      image->GetSize());
+
+  Maybe<uint64_t> duration =
+      aInit.mDuration.WasPassed() ? Some(aInit.mDuration.Value()) : Nothing();
+
+  // TODO: WPT will fail if we guess a VideoColorSpace here.
+  const VideoColorSpaceInit colorSpace{};
+  return MakeAndAddRef<VideoFrame>(aGlobal, image, format->PixelFormat(),
+                                   image->GetSize(), visibleRect.value(),
+                                   displaySize.value(), duration,
+                                   aInit.mTimestamp.Value(), colorSpace);
+}
+
+// https://w3c.github.io/webcodecs/#videoframe-initialize-frame-from-other-frame
+static Result<already_AddRefed<VideoFrame>, nsCString>
+InitializeFrameFromOtherFrame(nsIGlobalObject* aGlobal, VideoFrameData&& aData,
+                              const VideoFrameInit& aInit) {
+  MOZ_ASSERT(aGlobal);
+  MOZ_ASSERT(aData.mImage);
+
+  VideoFrame::Format format(aData.mFormat);
+  if (aInit.mAlpha == AlphaOption::Discard) {
+    format.MakeOpaque();
+    // Keep the alpha data in image for now until it's being rendered.
+  }
+
+  std::pair<Maybe<gfx::IntRect>, Maybe<gfx::IntSize>> init;
+  MOZ_TRY_VAR(init,
+              ValidateVideoFrameInit(aInit, format, aData.mImage->GetSize()));
+  Maybe<gfx::IntRect> visibleRect = init.first;
+  Maybe<gfx::IntSize> displaySize = init.second;
+
+  InitializeVisibleRectAndDisplaySize(visibleRect, displaySize,
+                                      aData.mVisibleRect, aData.mDisplaySize);
+
+  Maybe<uint64_t> duration = aInit.mDuration.WasPassed()
+                                 ? Some(aInit.mDuration.Value())
+                                 : aData.mDuration;
+  int64_t timestamp = aInit.mTimestamp.WasPassed() ? aInit.mTimestamp.Value()
+                                                   : aData.mTimestamp;
+
+  return MakeAndAddRef<VideoFrame>(
+      aGlobal, aData.mImage, format.PixelFormat(), aData.mImage->GetSize(),
+      *visibleRect, *displaySize, duration, timestamp, aData.mColorSpace);
+}
+
+/*
+ * Helper classes carrying VideoFrame data
+ */
+
+VideoFrameData::VideoFrameData(layers::Image* aImage,
+                               const VideoPixelFormat& aFormat,
+                               gfx::IntRect aVisibleRect,
+                               gfx::IntSize aDisplaySize,
+                               Maybe<uint64_t> aDuration, int64_t aTimestamp,
+                               const VideoColorSpaceInit& aColorSpace)
+    : mImage(aImage),
+      mFormat(aFormat),
+      mVisibleRect(aVisibleRect),
+      mDisplaySize(aDisplaySize),
+      mDuration(aDuration),
+      mTimestamp(aTimestamp),
+      mColorSpace(aColorSpace) {}
+
+VideoFrameSerializedData::VideoFrameSerializedData(
+    layers::Image* aImage, const VideoPixelFormat& aFormat,
+    gfx::IntSize aCodedSize, gfx::IntRect aVisibleRect,
+    gfx::IntSize aDisplaySize, Maybe<uint64_t> aDuration, int64_t aTimestamp,
+    const VideoColorSpaceInit& aColorSpace,
+    already_AddRefed<nsIURI> aPrincipalURI)
+    : VideoFrameData(aImage, aFormat, aVisibleRect, aDisplaySize, aDuration,
+                     aTimestamp, aColorSpace),
+      mCodedSize(aCodedSize),
+      mPrincipalURI(aPrincipalURI) {}
+
+/*
+ * W3C Webcodecs VideoFrame implementation
+ */
+
+VideoFrame::VideoFrame(nsIGlobalObject* aParent,
+                       const RefPtr<layers::Image>& aImage,
+                       const VideoPixelFormat& aFormat, gfx::IntSize aCodedSize,
+                       gfx::IntRect aVisibleRect, gfx::IntSize aDisplaySize,
+                       const Maybe<uint64_t>& aDuration, int64_t aTimestamp,
+                       const VideoColorSpaceInit& aColorSpace)
+    : mParent(aParent),
+      mResource(Some(Resource(aImage, VideoFrame::Format(aFormat)))),
+      mCodedSize(aCodedSize),
+      mVisibleRect(aVisibleRect),
+      mDisplaySize(aDisplaySize),
+      mDuration(aDuration),
+      mTimestamp(aTimestamp),
+      mColorSpace(aColorSpace) {
+  MOZ_ASSERT(mParent);
+}
+
+VideoFrame::VideoFrame(const VideoFrame& aOther)
+    : mParent(aOther.mParent),
+      mResource(aOther.mResource),
+      mCodedSize(aOther.mCodedSize),
+      mVisibleRect(aOther.mVisibleRect),
+      mDisplaySize(aOther.mDisplaySize),
+      mDuration(aOther.mDuration),
+      mTimestamp(aOther.mTimestamp),
+      mColorSpace(aOther.mColorSpace) {
+  MOZ_ASSERT(mParent);
+}
+
+nsIGlobalObject* VideoFrame::GetParentObject() const {
+  AssertIsOnOwningThread();
+
+  return mParent.get();
+}
+
+JSObject* VideoFrame::WrapObject(JSContext* aCx,
+                                 JS::Handle<JSObject*> aGivenProto) {
+  AssertIsOnOwningThread();
+
+  return VideoFrame_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+// The following constructors are defined in
+// https://w3c.github.io/webcodecs/#dom-videoframe-videoframe
+
+/* static */
+already_AddRefed<VideoFrame> VideoFrame::Constructor(
+    const GlobalObject& aGlobal, HTMLImageElement& aImageElement,
+    const VideoFrameInit& aInit, ErrorResult& aRv) {
+  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
+  if (!global) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return nullptr;
+  }
+
+  // Check the usability.
+  if (aImageElement.IntrinsicState().HasState(ElementState::BROKEN)) {
+    aRv.ThrowInvalidStateError("The image's state is broken");
+    return nullptr;
+  }
+  if (!aImageElement.Complete()) {
+    aRv.ThrowInvalidStateError("The image is not completely loaded yet");
+    return nullptr;
+  }
+  if (aImageElement.NaturalWidth() == 0) {
+    aRv.ThrowInvalidStateError("The image has a width of 0");
+    return nullptr;
+  }
+  if (aImageElement.NaturalHeight() == 0) {
+    aRv.ThrowInvalidStateError("The image has a height of 0");
+    return nullptr;
+  }
+
+  // If the origin of HTMLImageElement's image data is not same origin with the
+  // entry settings object's origin, then throw a SecurityError DOMException.
+  SurfaceFromElementResult res = nsLayoutUtils::SurfaceFromElement(
+      &aImageElement, nsLayoutUtils::SFE_WANT_FIRST_FRAME_IF_IMAGE);
+  if (res.mIsWriteOnly) {
+    // Being write-only implies its image is cross-origin w/out CORS headers.
+    aRv.ThrowSecurityError("The image is not same-origin");
+    return nullptr;
+  }
+
+  RefPtr<gfx::SourceSurface> surface = res.GetSourceSurface();
+  if (NS_WARN_IF(!surface)) {
+    aRv.ThrowInvalidStateError("The image's surface acquisition failed");
+    return nullptr;
+  }
+
+  if (!aInit.mTimestamp.WasPassed()) {
+    aRv.ThrowTypeError("Missing timestamp");
+    return nullptr;
+  }
+
+  RefPtr<layers::SourceSurfaceImage> image =
+      new layers::SourceSurfaceImage(surface.get());
+  auto r = InitializeFrameWithResourceAndSize(global, aInit, image.forget());
+  if (r.isErr()) {
+    aRv.ThrowTypeError(r.unwrapErr());
+    return nullptr;
+  }
+  return r.unwrap();
+}
+
+/* static */
+already_AddRefed<VideoFrame> VideoFrame::Constructor(
+    const GlobalObject& aGlobal, SVGImageElement& aSVGImageElement,
+    const VideoFrameInit& aInit, ErrorResult& aRv) {
+  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
+  if (!global) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return nullptr;
+  }
+
+  // Check the usability.
+  if (aSVGImageElement.IntrinsicState().HasState(ElementState::BROKEN)) {
+    aRv.ThrowInvalidStateError("The SVG's state is broken");
+    return nullptr;
+  }
+
+  // Check the image width and height.
+  if (!aSVGImageElement.HasValidDimensions()) {
+    aRv.ThrowInvalidStateError("The SVG does not have valid dimensions");
+    return nullptr;
+  }
+
+  // If the origin of SVGImageElement's image data is not same origin with the
+  // entry settings object's origin, then throw a SecurityError DOMException.
+  SurfaceFromElementResult res = nsLayoutUtils::SurfaceFromElement(
+      &aSVGImageElement, nsLayoutUtils::SFE_WANT_FIRST_FRAME_IF_IMAGE);
+  if (res.mIsWriteOnly) {
+    // Being write-only implies its image is cross-origin w/out CORS headers.
+    aRv.ThrowSecurityError("The SVG is not same-origin");
+    return nullptr;
+  }
+
+  RefPtr<gfx::SourceSurface> surface = res.GetSourceSurface();
+  if (NS_WARN_IF(!surface)) {
+    aRv.ThrowInvalidStateError("The SVG's surface acquisition failed");
+    return nullptr;
+  }
+
+  if (!aInit.mTimestamp.WasPassed()) {
+    aRv.ThrowTypeError("Missing timestamp");
+    return nullptr;
+  }
+
+  RefPtr<layers::SourceSurfaceImage> image =
+      new layers::SourceSurfaceImage(surface.get());
+  auto r = InitializeFrameWithResourceAndSize(global, aInit, image.forget());
+  if (r.isErr()) {
+    aRv.ThrowTypeError(r.unwrapErr());
+    return nullptr;
+  }
+  return r.unwrap();
+}
+
+/* static */
+already_AddRefed<VideoFrame> VideoFrame::Constructor(
+    const GlobalObject& aGlobal, HTMLCanvasElement& aCanvasElement,
+    const VideoFrameInit& aInit, ErrorResult& aRv) {
+  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
+  if (!global) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return nullptr;
+  }
+
+  // Check the usability.
+  if (aCanvasElement.Width() == 0) {
+    aRv.ThrowInvalidStateError("The canvas has a width of 0");
+    return nullptr;
+  }
+
+  if (aCanvasElement.Height() == 0) {
+    aRv.ThrowInvalidStateError("The canvas has a height of 0");
+    return nullptr;
+  }
+
+  // If the origin of HTMLCanvasElement's image data is not same origin with the
+  // entry settings object's origin, then throw a SecurityError DOMException.
+  SurfaceFromElementResult res = nsLayoutUtils::SurfaceFromElement(
+      &aCanvasElement, nsLayoutUtils::SFE_WANT_FIRST_FRAME_IF_IMAGE);
+  if (res.mIsWriteOnly) {
+    // Being write-only implies its image is cross-origin w/out CORS headers.
+    aRv.ThrowSecurityError("The canvas is not same-origin");
+    return nullptr;
+  }
+
+  RefPtr<gfx::SourceSurface> surface = res.GetSourceSurface();
+  if (NS_WARN_IF(!surface)) {
+    aRv.ThrowInvalidStateError("The canvas' surface acquisition failed");
+    return nullptr;
+  }
+
+  if (!aInit.mTimestamp.WasPassed()) {
+    aRv.ThrowTypeError("Missing timestamp");
+    return nullptr;
+  }
+
+  RefPtr<layers::SourceSurfaceImage> image =
+      new layers::SourceSurfaceImage(surface.get());
+  auto r = InitializeFrameWithResourceAndSize(global, aInit, image.forget());
+  if (r.isErr()) {
+    aRv.ThrowTypeError(r.unwrapErr());
+    return nullptr;
+  }
+  return r.unwrap();
+}
+
+/* static */
+already_AddRefed<VideoFrame> VideoFrame::Constructor(
+    const GlobalObject& aGlobal, HTMLVideoElement& aVideoElement,
+    const VideoFrameInit& aInit, ErrorResult& aRv) {
+  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
+  if (!global) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return nullptr;
+  }
+
+  aVideoElement.LogVisibility(
+      mozilla::dom::HTMLVideoElement::CallerAPI::CREATE_VIDEOFRAME);
+
+  // Check the usability.
+  if (aVideoElement.NetworkState() == HTMLMediaElement_Binding::NETWORK_EMPTY) {
+    aRv.ThrowInvalidStateError("The video has not been initialized yet");
+    return nullptr;
+  }
+  if (aVideoElement.ReadyState() <= HTMLMediaElement_Binding::HAVE_METADATA) {
+    aRv.ThrowInvalidStateError("The video is not ready yet");
+    return nullptr;
+  }
+  RefPtr<layers::Image> image = aVideoElement.GetCurrentImage();
+  if (!image) {
+    aRv.ThrowInvalidStateError("The video doesn't have any image yet");
+    return nullptr;
+  }
+
+  // If the origin of HTMLVideoElement's image data is not same origin with the
+  // entry settings object's origin, then throw a SecurityError DOMException.
+  if (!IsSameOrigin(global.get(), aVideoElement)) {
+    aRv.ThrowSecurityError("The video is not same-origin");
+    return nullptr;
+  }
+
+  const ImageUtils imageUtils(image);
+  Maybe<VideoPixelFormat> format = ToVideoPixelFormat(imageUtils.GetFormat());
+  if (!format) {
+    aRv.ThrowTypeError("The video's image is in unsupported format");
+    return nullptr;
+  }
+
+  // TODO: Retrive/infer the duration, and colorspace.
+  auto r = InitializeFrameFromOtherFrame(
+      global.get(),
+      VideoFrameData(image.get(), format.ref(), image->GetPictureRect(),
+                     image->GetSize(), Nothing(),
+                     static_cast<int64_t>(aVideoElement.CurrentTime()), {}),
+      aInit);
+  if (r.isErr()) {
+    aRv.ThrowTypeError(r.unwrapErr());
+    return nullptr;
+  }
+  return r.unwrap();
+}
+
+/* static */
+already_AddRefed<VideoFrame> VideoFrame::Constructor(
+    const GlobalObject& aGlobal, OffscreenCanvas& aOffscreenCanvas,
+    const VideoFrameInit& aInit, ErrorResult& aRv) {
+  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
+  if (!global) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return nullptr;
+  }
+
+  // Check the usability.
+  if (aOffscreenCanvas.Width() == 0) {
+    aRv.ThrowInvalidStateError("The canvas has a width of 0");
+    return nullptr;
+  }
+  if (aOffscreenCanvas.Height() == 0) {
+    aRv.ThrowInvalidStateError("The canvas has a height of 0");
+    return nullptr;
+  }
+
+  // If the origin of the OffscreenCanvas's image data is not same origin with
+  // the entry settings object's origin, then throw a SecurityError
+  // DOMException.
+  SurfaceFromElementResult res = nsLayoutUtils::SurfaceFromOffscreenCanvas(
+      &aOffscreenCanvas, nsLayoutUtils::SFE_WANT_FIRST_FRAME_IF_IMAGE);
+  if (res.mIsWriteOnly) {
+    // Being write-only implies its image is cross-origin w/out CORS headers.
+    aRv.ThrowSecurityError("The canvas is not same-origin");
+    return nullptr;
+  }
+
+  RefPtr<gfx::SourceSurface> surface = res.GetSourceSurface();
+  if (NS_WARN_IF(!surface)) {
+    aRv.ThrowInvalidStateError("The canvas' surface acquisition failed");
+    return nullptr;
+  }
+
+  if (!aInit.mTimestamp.WasPassed()) {
+    aRv.ThrowTypeError("Missing timestamp");
+    return nullptr;
+  }
+
+  RefPtr<layers::SourceSurfaceImage> image =
+      new layers::SourceSurfaceImage(surface.get());
+  auto r = InitializeFrameWithResourceAndSize(global, aInit, image.forget());
+  if (r.isErr()) {
+    aRv.ThrowTypeError(r.unwrapErr());
+    return nullptr;
+  }
+  return r.unwrap();
+}
+
+/* static */
+already_AddRefed<VideoFrame> VideoFrame::Constructor(
+    const GlobalObject& aGlobal, ImageBitmap& aImageBitmap,
+    const VideoFrameInit& aInit, ErrorResult& aRv) {
+  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
+  if (!global) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return nullptr;
+  }
+
+  // Check the usability.
+  UniquePtr<ImageBitmapCloneData> data = aImageBitmap.ToCloneData();
+  if (!data || !data->mSurface) {
+    aRv.ThrowInvalidStateError(
+        "The ImageBitmap is closed or its surface acquisition failed");
+    return nullptr;
+  }
+
+  // If the origin of the ImageBitmap's image data is not same origin with the
+  // entry settings object's origin, then throw a SecurityError DOMException.
+  if (data->mWriteOnly) {
+    // Being write-only implies its image is cross-origin w/out CORS headers.
+    aRv.ThrowSecurityError("The ImageBitmap is not same-origin");
+    return nullptr;
+  }
+
+  if (!aInit.mTimestamp.WasPassed()) {
+    aRv.ThrowTypeError("Missing timestamp");
+    return nullptr;
+  }
+
+  RefPtr<layers::SourceSurfaceImage> image =
+      new layers::SourceSurfaceImage(data->mSurface.get());
+  // TODO: Take care of data->mAlphaType
+  auto r = InitializeFrameWithResourceAndSize(global, aInit, image.forget());
+  if (r.isErr()) {
+    aRv.ThrowTypeError(r.unwrapErr());
+    return nullptr;
+  }
+  return r.unwrap();
+}
+
+/* static */
+already_AddRefed<VideoFrame> VideoFrame::Constructor(
+    const GlobalObject& aGlobal, VideoFrame& aVideoFrame,
+    const VideoFrameInit& aInit, ErrorResult& aRv) {
+  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
+  if (!global) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return nullptr;
+  }
+
+  // Check the usability.
+  if (!aVideoFrame.mResource) {
+    aRv.ThrowInvalidStateError(
+        "The VideoFrame is closed or no image found there");
+    return nullptr;
+  }
+  MOZ_ASSERT(aVideoFrame.mResource->mImage->GetSize() ==
+             aVideoFrame.mCodedSize);
+  MOZ_ASSERT(!aVideoFrame.mCodedSize.IsEmpty());
+  MOZ_ASSERT(!aVideoFrame.mVisibleRect.IsEmpty());
+  MOZ_ASSERT(!aVideoFrame.mDisplaySize.IsEmpty());
+
+  // If the origin of the VideoFrame is not same origin with the entry settings
+  // object's origin, then throw a SecurityError DOMException.
+  if (!IsSameOrigin(global.get(), aVideoFrame)) {
+    aRv.ThrowSecurityError("The VideoFrame is not same-origin");
+    return nullptr;
+  }
+
+  auto r = InitializeFrameFromOtherFrame(
+      global.get(),
+      VideoFrameData(aVideoFrame.mResource->mImage.get(),
+                     aVideoFrame.mResource->mFormat.PixelFormat(),
+                     aVideoFrame.mVisibleRect, aVideoFrame.mDisplaySize,
+                     aVideoFrame.mDuration, aVideoFrame.mTimestamp,
+                     aVideoFrame.mColorSpace),
+      aInit);
+  if (r.isErr()) {
+    aRv.ThrowTypeError(r.unwrapErr());
+    return nullptr;
+  }
+  return r.unwrap();
+}
+
+// The following constructors are defined in
+// https://w3c.github.io/webcodecs/#dom-videoframe-videoframe-data-init
+
+/* static */
+already_AddRefed<VideoFrame> VideoFrame::Constructor(
+    const GlobalObject& aGlobal, const ArrayBufferView& aBufferView,
+    const VideoFrameBufferInit& aInit, ErrorResult& aRv) {
+  return CreateVideoFrameFromBuffer(aGlobal, aBufferView, aInit, aRv);
+}
+
+/* static */
+already_AddRefed<VideoFrame> VideoFrame::Constructor(
+    const GlobalObject& aGlobal, const ArrayBuffer& aBuffer,
+    const VideoFrameBufferInit& aInit, ErrorResult& aRv) {
+  return CreateVideoFrameFromBuffer(aGlobal, aBuffer, aInit, aRv);
+}
+
+// https://w3c.github.io/webcodecs/#dom-videoframe-format
+Nullable<VideoPixelFormat> VideoFrame::GetFormat() const {
+  AssertIsOnOwningThread();
+
+  return mResource
+             ? Nullable<VideoPixelFormat>(mResource->mFormat.PixelFormat())
+             : Nullable<VideoPixelFormat>();
+}
+
+// https://w3c.github.io/webcodecs/#dom-videoframe-codedwidth
+uint32_t VideoFrame::CodedWidth() const {
+  AssertIsOnOwningThread();
+
+  return static_cast<uint32_t>(mCodedSize.Width());
+}
+
+// https://w3c.github.io/webcodecs/#dom-videoframe-codedheight
+uint32_t VideoFrame::CodedHeight() const {
+  AssertIsOnOwningThread();
+
+  return static_cast<uint32_t>(mCodedSize.Height());
+}
+
+// https://w3c.github.io/webcodecs/#dom-videoframe-codedrect
+already_AddRefed<DOMRectReadOnly> VideoFrame::GetCodedRect() const {
+  AssertIsOnOwningThread();
+
+  return mResource
+             ? MakeAndAddRef<DOMRectReadOnly>(
+                   mParent, 0.0f, 0.0f, static_cast<double>(mCodedSize.Width()),
+                   static_cast<double>(mCodedSize.Height()))
+             : nullptr;
+}
+
+// https://w3c.github.io/webcodecs/#dom-videoframe-visiblerect
+already_AddRefed<DOMRectReadOnly> VideoFrame::GetVisibleRect() const {
+  AssertIsOnOwningThread();
+
+  return mResource ? MakeAndAddRef<DOMRectReadOnly>(
+                         mParent, static_cast<double>(mVisibleRect.X()),
+                         static_cast<double>(mVisibleRect.Y()),
+                         static_cast<double>(mVisibleRect.Width()),
+                         static_cast<double>(mVisibleRect.Height()))
+                   : nullptr;
+}
+
+// https://w3c.github.io/webcodecs/#dom-videoframe-displaywidth
+uint32_t VideoFrame::DisplayWidth() const {
+  AssertIsOnOwningThread();
+
+  return static_cast<uint32_t>(mDisplaySize.Width());
+}
+
+// https://w3c.github.io/webcodecs/#dom-videoframe-displayheight
+uint32_t VideoFrame::DisplayHeight() const {
+  AssertIsOnOwningThread();
+
+  return static_cast<uint32_t>(mDisplaySize.Height());
+}
+
+// https://w3c.github.io/webcodecs/#dom-videoframe-duration
+Nullable<uint64_t> VideoFrame::GetDuration() const {
+  AssertIsOnOwningThread();
+
+  return mDuration ? Nullable<uint64_t>(*mDuration) : Nullable<uint64_t>();
+}
+
+// https://w3c.github.io/webcodecs/#dom-videoframe-timestamp
+int64_t VideoFrame::Timestamp() const {
+  AssertIsOnOwningThread();
+
+  return mTimestamp;
+}
+
+// https://w3c.github.io/webcodecs/#dom-videoframe-colorspace
+already_AddRefed<VideoColorSpace> VideoFrame::ColorSpace() const {
+  AssertIsOnOwningThread();
+
+  return MakeAndAddRef<VideoColorSpace>(mParent, mColorSpace);
+}
+
+// https://w3c.github.io/webcodecs/#dom-videoframe-allocationsize
+uint32_t VideoFrame::AllocationSize(const VideoFrameCopyToOptions& aOptions,
+                                    ErrorResult& aRv) {
+  AssertIsOnOwningThread();
+
+  if (!mResource) {
+    aRv.ThrowInvalidStateError("No media resource in VideoFrame");
+    return 0;
+  }
+
+  auto r = ParseVideoFrameCopyToOptions(aOptions, mVisibleRect, mCodedSize,
+                                        mResource->mFormat);
+  if (r.isErr()) {
+    // TODO: Should throw layout.
+    aRv.ThrowTypeError(r.unwrapErr());
+    return 0;
+  }
+  CombinedBufferLayout layout = r.unwrap();
+
+  return layout.mAllocationSize;
+}
+
+// https://w3c.github.io/webcodecs/#dom-videoframe-copyto
+already_AddRefed<Promise> VideoFrame::CopyTo(
+    const MaybeSharedArrayBufferViewOrMaybeSharedArrayBuffer& aDestination,
+    const VideoFrameCopyToOptions& aOptions, ErrorResult& aRv) {
+  AssertIsOnOwningThread();
+
+  if (!mResource) {
+    aRv.ThrowInvalidStateError("No media resource in VideoFrame");
+    return nullptr;
+  }
+
+  RefPtr<Promise> p = Promise::Create(mParent.get(), aRv);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return p.forget();
+  }
+
+  CombinedBufferLayout layout;
+  auto r1 = ParseVideoFrameCopyToOptions(aOptions, mVisibleRect, mCodedSize,
+                                         mResource->mFormat);
+  if (r1.isErr()) {
+    // TODO: Should reject with layout.
+    p->MaybeRejectWithTypeError(r1.unwrapErr());
+    return p.forget();
+  }
+  layout = r1.unwrap();
+
+  auto r2 = GetSharedArrayBufferData(aDestination);
+  if (r2.isErr()) {
+    p->MaybeRejectWithTypeError("Failed to get buffer");
+    return p.forget();
+  }
+  Span<uint8_t> buffer = r2.unwrap();
+
+  if (buffer.size_bytes() < layout.mAllocationSize) {
+    p->MaybeRejectWithTypeError("Destination buffer is too small");
+    return p.forget();
+  }
+
+  Sequence<PlaneLayout> planeLayouts;
+
+  nsTArray<Format::Plane> planes = mResource->mFormat.Planes();
+  MOZ_ASSERT(layout.mComputedLayouts.Length() == planes.Length());
+
+  // TODO: These jobs can be run in a thread pool (bug 1780656) to unblock the
+  // current thread.
+  for (size_t i = 0; i < layout.mComputedLayouts.Length(); ++i) {
+    ComputedPlaneLayout& l = layout.mComputedLayouts[i];
+    uint32_t destinationOffset = l.mDestinationOffset;
+
+    PlaneLayout* pl = planeLayouts.AppendElement(fallible);
+    if (!pl) {
+      p->MaybeRejectWithTypeError("Out of memory");
+      return p.forget();
+    }
+    pl->mOffset = l.mDestinationOffset;
+    pl->mStride = l.mDestinationStride;
+
+    // Copy pixels of `size` starting from `origin` on planes[i] to
+    // `aDestination`.
+    gfx::IntPoint origin(
+        l.mSourceLeftBytes / mResource->mFormat.SampleBytes(planes[i]),
+        l.mSourceTop);
+    gfx::IntSize size(
+        l.mSourceWidthBytes / mResource->mFormat.SampleBytes(planes[i]),
+        l.mSourceHeight);
+    if (!mResource->CopyTo(planes[i], {origin, size},
+                           buffer.From(destinationOffset),
+                           static_cast<size_t>(l.mDestinationStride))) {
+      p->MaybeRejectWithTypeError(
+          nsPrintfCString("Failed to copy image data in %s plane",
+                          mResource->mFormat.PlaneName(planes[i])));
+      return p.forget();
+    }
+  }
+
+  MOZ_ASSERT(layout.mComputedLayouts.Length() == planes.Length());
+  // TODO: Spec doesn't resolve with a value. See
+  // https://github.com/w3c/webcodecs/issues/510 This comment should be removed
+  // once the issue is resolved.
+  p->MaybeResolve(planeLayouts);
+  return p.forget();
+}
+
+// https://w3c.github.io/webcodecs/#dom-videoframe-clone
+already_AddRefed<VideoFrame> VideoFrame::Clone(ErrorResult& aRv) {
+  AssertIsOnOwningThread();
+
+  if (!mResource) {
+    aRv.ThrowInvalidStateError("No media resource in the VideoFrame now");
+    return nullptr;
+  }
+  // The VideoFrame's data must be shared instead of copied:
+  // https://w3c.github.io/webcodecs/#raw-media-memory-model-reference-counting
+  return MakeAndAddRef<VideoFrame>(*this);
+}
+
+// https://w3c.github.io/webcodecs/#close-videoframe
+void VideoFrame::Close() {
+  AssertIsOnOwningThread();
+
+  mResource.reset();
+  mCodedSize = gfx::IntSize();
+  mVisibleRect = gfx::IntRect();
+  mDisplaySize = gfx::IntSize();
+  mDuration.reset();
+}
+
+// https://w3c.github.io/webcodecs/#ref-for-deserialization-steps%E2%91%A0
+/* static */
+JSObject* VideoFrame::ReadStructuredClone(
+    JSContext* aCx, nsIGlobalObject* aGlobal, JSStructuredCloneReader* aReader,
+    const VideoFrameSerializedData& aData) {
+  if (!IsSameOrigin(aGlobal, aData.mPrincipalURI.get())) {
+    return nullptr;
+  }
+
+  JS::Rooted<JS::Value> value(aCx, JS::NullValue());
+  // To avoid a rooting hazard error from returning a raw JSObject* before
+  // running the RefPtr destructor, RefPtr needs to be destructed before
+  // returning the raw JSObject*, which is why the RefPtr<VideoFrame> is created
+  // in the scope below. Otherwise, the static analysis infers the RefPtr cannot
+  // be safely destructed while the unrooted return JSObject* is on the stack.
+  {
+    RefPtr<VideoFrame> frame = MakeAndAddRef<VideoFrame>(
+        aGlobal, aData.mImage, aData.mFormat, aData.mCodedSize,
+        aData.mVisibleRect, aData.mDisplaySize, aData.mDuration,
+        aData.mTimestamp, aData.mColorSpace);
+    if (!GetOrCreateDOMReflector(aCx, frame, &value) || !value.isObject()) {
+      return nullptr;
+    }
+  }
+  return value.toObjectOrNull();
+}
+
+// https://w3c.github.io/webcodecs/#ref-for-serialization-steps%E2%91%A0
+bool VideoFrame::WriteStructuredClone(JSStructuredCloneWriter* aWriter,
+                                      StructuredCloneHolder* aHolder) const {
+  AssertIsOnOwningThread();
+
+  if (!mResource) {
+    return false;
+  }
+
+  // Indexing the image and send the index to the receiver.
+  const uint32_t index = aHolder->VideoFrames().Length();
+  RefPtr<layers::Image> image(mResource->mImage.get());
+  // The serialization is limited to the same process scope so it's ok to
+  // serialize a reference instead of a copy.
+  aHolder->VideoFrames().AppendElement(VideoFrameSerializedData(
+      image.get(), mResource->mFormat.PixelFormat(), mCodedSize, mVisibleRect,
+      mDisplaySize, mDuration, mTimestamp, mColorSpace, GetPrincipalURI()));
+
+  return !NS_WARN_IF(!JS_WriteUint32Pair(aWriter, SCTAG_DOM_VIDEOFRAME, index));
+}
+
+// https://w3c.github.io/webcodecs/#ref-for-transfer-steps%E2%91%A0
+UniquePtr<VideoFrame::TransferredData> VideoFrame::Transfer() {
+  AssertIsOnOwningThread();
+
+  if (!mResource) {
+    return nullptr;
+  }
+
+  Resource r = mResource.extract();
+  auto frame = MakeUnique<TransferredData>(
+      r.mImage.get(), r.mFormat.PixelFormat(), mCodedSize, mVisibleRect,
+      mDisplaySize, mDuration, mTimestamp, mColorSpace, GetPrincipalURI());
+  Close();
+  return frame;
+}
+
+// https://w3c.github.io/webcodecs/#ref-for-transfer-receiving-steps%E2%91%A0
+/* static */
+already_AddRefed<VideoFrame> VideoFrame::FromTransferred(
+    nsIGlobalObject* aGlobal, TransferredData* aData) {
+  MOZ_ASSERT(aData);
+
+  if (!IsSameOrigin(aGlobal, aData->mPrincipalURI.get())) {
+    return nullptr;
+  }
+
+  return MakeAndAddRef<VideoFrame>(aGlobal, aData->mImage, aData->mFormat,
+                                   aData->mCodedSize, aData->mVisibleRect,
+                                   aData->mDisplaySize, aData->mDuration,
+                                   aData->mTimestamp, aData->mColorSpace);
+}
+
+already_AddRefed<nsIURI> VideoFrame::GetPrincipalURI() const {
+  AssertIsOnOwningThread();
+
+  nsIPrincipal* principal = mParent->PrincipalOrNull();
+  return principal ? principal->GetURI() : nullptr;
+}
+
+/*
+ * VideoFrame::Format
+ *
+ * This class wraps a VideoPixelFormat defined in [1] and provides some
+ * utilities for the VideoFrame's functions. Each sample in the format is 8
+ * bits. The pixel layouts for a 4 x 2 image in the spec are illustrated below:
+ * [1] https://w3c.github.io/webcodecs/#pixel-format
+ *
+ * I420 - 3 planes: Y, U, V
+ * ------
+ *     <- width ->
+ *  Y: Y1 Y2 Y3 Y4 ^ height
+ *     Y5 Y6 Y7 Y8 v
+ *  U: U1    U2      => 1/2 Y's width, 1/2 Y's height
+ *  V: V1    V2      => 1/2 Y's width, 1/2 Y's height
+ *
+ * I420A - 4 planes: Y, U, V, A
+ * ------
+ *     <- width ->
+ *  Y: Y1 Y2 Y3 Y4 ^ height
+ *     Y5 Y6 Y7 Y8 v
+ *  U: U1    U2      => 1/2 Y's width, 1/2 Y's height
+ *  V: V1    V2      => 1/2 Y's width, 1/2 Y's height
+ *  A: A1 A2 A3 A4   => Y's width, Y's height
+ *     A5 A6 A7 A8
+ *
+ * I422 - 3 planes: Y, U, V
+ * ------
+ *     <- width ->
+ *  Y: Y1 Y2 Y3 Y4 ^ height
+ *     Y5 Y6 Y7 Y8 v
+ *  U: U1 U2 U3 U4 => Y's width, 1/2 Y's height
+ *  V: V1 V2 V3 V4 => Y's width, 1/2 Y's height
+ *
+ * I444 - 3 planes: Y, U, V
+ * ------
+ *     <- width ->
+ *  Y: Y1 Y2 Y3 Y4 ^ height
+ *     Y5 Y6 Y7 Y8 v
+ *  U: U1 U2 U3 U4   => Y's width, Y's height
+ *     U5 U6 U7 U8
+ *  V: V1 V2 V3 V4   => Y's width, Y's height
+ *     V5 V6 V7 B8
+ *
+ * NV12 - 2 planes: Y, UV
+ * ------
+ *     <- width ->
+ *  Y: Y1 Y2 Y3 Y4 ^ height
+ *     Y5 Y6 Y7 Y8 v
+ * UV: U1 V1 U2 V2 => Y's width, 1/2 Y's height
+ *
+ * RGBA - 1 plane encoding 3 colors: Red, Green, Blue, and an Alpha value
+ * ------
+ *     <---------------------- width ---------------------->
+ *     R1 G1 B1 A1 | R2 G2 B2 A2 | R3 G3 B3 A3 | R4 G4 B4 A4 ^ height
+ *     R5 G5 B5 A5 | R6 G6 B6 A6 | R7 G7 B7 A7 | R8 G8 B8 A8 v
+ *
+ * RGBX - 1 plane encoding 3 colors: Red, Green, Blue, and an padding value
+ *      This is the opaque version of RGBA
+ * ------
+ *     <---------------------- width ---------------------->
+ *     R1 G1 B1 X1 | R2 G2 B2 X2 | R3 G3 B3 X3 | R4 G4 B4 X4 ^ height
+ *     R5 G5 B5 X5 | R6 G6 B6 X6 | R7 G7 B7 X7 | R8 G8 B8 X8 v
+ *
+ * BGRA - 1 plane encoding 3 colors: Blue, Green, Red, and an Alpha value
+ * ------
+ *     <---------------------- width ---------------------->
+ *     B1 G1 R1 A1 | B2 G2 R2 A2 | B3 G3 R3 A3 | B4 G4 R4 A4 ^ height
+ *     B5 G5 R5 A5 | B6 G6 R6 A6 | B7 G7 R7 A7 | B8 G8 R8 A8 v
+ *
+ * BGRX - 1 plane encoding 3 colors: Blue, Green, Red, and an padding value
+ *      This is the opaque version of BGRA
+ * ------
+ *     <---------------------- width ---------------------->
+ *     B1 G1 R1 X1 | B2 G2 R2 X2 | B3 G3 R3 X3 | B4 G4 R4 X4 ^ height
+ *     B5 G5 R5 X5 | B6 G6 R6 X6 | B7 G7 R7 X7 | B8 G8 R8 X8 v
+ */
+
+VideoFrame::Format::Format(const VideoPixelFormat& aFormat)
+    : mFormat(aFormat) {}
+
+const VideoPixelFormat& VideoFrame::Format::PixelFormat() const {
+  return mFormat;
+}
+
+gfx::SurfaceFormat VideoFrame::Format::ToSurfaceFormat() const {
+  gfx::SurfaceFormat format = gfx::SurfaceFormat::UNKNOWN;
+  switch (mFormat) {
+    case VideoPixelFormat::I420:
+    case VideoPixelFormat::I420A:
+    case VideoPixelFormat::I422:
+    case VideoPixelFormat::I444:
+    case VideoPixelFormat::NV12:
+      // Not yet support for now.
+      break;
+    case VideoPixelFormat::RGBA:
+      format = gfx::SurfaceFormat::R8G8B8A8;
+      break;
+    case VideoPixelFormat::RGBX:
+      format = gfx::SurfaceFormat::R8G8B8X8;
+      break;
+    case VideoPixelFormat::BGRA:
+      format = gfx::SurfaceFormat::B8G8R8A8;
+      break;
+    case VideoPixelFormat::BGRX:
+      format = gfx::SurfaceFormat::B8G8R8X8;
+      break;
+    case VideoPixelFormat::EndGuard_:
+      MOZ_ASSERT_UNREACHABLE("unsupported format");
+  }
+  return format;
+}
+
+void VideoFrame::Format::MakeOpaque() {
+  switch (mFormat) {
+    case VideoPixelFormat::I420A:
+      mFormat = VideoPixelFormat::I420;
+      return;
+    case VideoPixelFormat::RGBA:
+      mFormat = VideoPixelFormat::RGBX;
+      return;
+    case VideoPixelFormat::BGRA:
+      mFormat = VideoPixelFormat::BGRX;
+      return;
+    case VideoPixelFormat::I420:
+    case VideoPixelFormat::I422:
+    case VideoPixelFormat::I444:
+    case VideoPixelFormat::NV12:
+    case VideoPixelFormat::RGBX:
+    case VideoPixelFormat::BGRX:
+      return;
+    case VideoPixelFormat::EndGuard_:
+      break;
+  }
+  MOZ_ASSERT_UNREACHABLE("unsupported format");
+}
+
+nsTArray<VideoFrame::Format::Plane> VideoFrame::Format::Planes() const {
+  switch (mFormat) {
+    case VideoPixelFormat::I420:
+    case VideoPixelFormat::I422:
+    case VideoPixelFormat::I444:
+      return {Plane::Y, Plane::U, Plane::V};
+    case VideoPixelFormat::I420A:
+      return {Plane::Y, Plane::U, Plane::V, Plane::A};
+    case VideoPixelFormat::NV12:
+      return {Plane::Y, Plane::UV};
+    case VideoPixelFormat::RGBA:
+    case VideoPixelFormat::RGBX:
+    case VideoPixelFormat::BGRA:
+    case VideoPixelFormat::BGRX:
+      return {Plane::RGBA};
+    case VideoPixelFormat::EndGuard_:
+      break;
+  }
+  MOZ_ASSERT_UNREACHABLE("unsupported format");
+  return {};
+}
+
+const char* VideoFrame::Format::PlaneName(const Plane& aPlane) const {
+  switch (aPlane) {
+    case Format::Plane::Y:  // and RGBA
+      return IsYUV() ? "Y" : "RGBA";
+    case Format::Plane::U:  // and UV
+      MOZ_ASSERT(IsYUV());
+      return mFormat == VideoPixelFormat::NV12 ? "UV" : "U";
+    case Format::Plane::V:
+      MOZ_ASSERT(IsYUV());
+      return "V";
+    case Format::Plane::A:
+      MOZ_ASSERT(IsYUV());
+      return "A";
+  }
+  MOZ_ASSERT_UNREACHABLE("invalid plane");
+  return "Unknown";
+}
+
+uint32_t VideoFrame::Format::SampleBytes(const Plane& aPlane) const {
+  switch (mFormat) {
+    case VideoPixelFormat::I420:
+    case VideoPixelFormat::I420A:
+    case VideoPixelFormat::I422:
+    case VideoPixelFormat::I444:
+      return 1;  // 8 bits/sample on the Y, U, V, A plane.
+    case VideoPixelFormat::NV12:
+      switch (aPlane) {
+        case Plane::Y:
+          return 1;  // 8 bits/sample on the Y plane
+        case Plane::UV:
+          return 2;  // Interleaved U and V values on the UV plane.
+        case Plane::V:
+        case Plane::A:
+          MOZ_ASSERT_UNREACHABLE("invalid plane");
+      }
+      return 0;
+    case VideoPixelFormat::RGBA:
+    case VideoPixelFormat::RGBX:
+    case VideoPixelFormat::BGRA:
+    case VideoPixelFormat::BGRX:
+      return 4;  // 8 bits/sample, 32 bits/pixel
+    case VideoPixelFormat::EndGuard_:
+      break;
+  }
+  MOZ_ASSERT_UNREACHABLE("unsupported format");
+  return 0;
+}
+
+gfx::IntSize VideoFrame::Format::SampleSize(const Plane& aPlane) const {
+  // The sample width and height refers to
+  // https://w3c.github.io/webcodecs/#sub-sampling-factor
+  switch (aPlane) {
+    case Plane::Y:  // and RGBA
+    case Plane::A:
+      return gfx::IntSize(1, 1);
+    case Plane::U:  // and UV
+    case Plane::V:
+      switch (mFormat) {
+        case VideoPixelFormat::I420:
+        case VideoPixelFormat::I420A:
+        case VideoPixelFormat::NV12:
+          return gfx::IntSize(2, 2);
+        case VideoPixelFormat::I422:
+          return gfx::IntSize(2, 1);
+        case VideoPixelFormat::I444:
+          return gfx::IntSize(1, 1);
+        case VideoPixelFormat::RGBA:
+        case VideoPixelFormat::RGBX:
+        case VideoPixelFormat::BGRA:
+        case VideoPixelFormat::BGRX:
+        case VideoPixelFormat::EndGuard_:
+          MOZ_ASSERT_UNREACHABLE("invalid format");
+          return {0, 0};
+      }
+  }
+  MOZ_ASSERT_UNREACHABLE("invalid plane");
+  return {0, 0};
+}
+
+bool VideoFrame::Format::IsValidSize(const gfx::IntSize& aSize) const {
+  switch (mFormat) {
+    case VideoPixelFormat::I420:
+    case VideoPixelFormat::I420A:
+    case VideoPixelFormat::NV12:
+      return (aSize.Width() % 2 == 0) && (aSize.Height() % 2 == 0);
+    case VideoPixelFormat::I422:
+      return aSize.Height() % 2 == 0;
+    case VideoPixelFormat::I444:
+    case VideoPixelFormat::RGBA:
+    case VideoPixelFormat::RGBX:
+    case VideoPixelFormat::BGRA:
+    case VideoPixelFormat::BGRX:
+      return true;
+    case VideoPixelFormat::EndGuard_:
+      break;
+  }
+  MOZ_ASSERT_UNREACHABLE("unsupported format");
+  return false;
+}
+
+size_t VideoFrame::Format::SampleCount(const gfx::IntSize& aSize) const {
+  MOZ_ASSERT(IsValidSize(aSize));
+
+  CheckedInt<size_t> count(aSize.Width());
+  count *= aSize.Height();
+
+  switch (mFormat) {
+    case VideoPixelFormat::I420:
+    case VideoPixelFormat::NV12:
+      return (count + count / 2).value();
+    case VideoPixelFormat::I420A:
+      return (count * 2 + count / 2).value();
+    case VideoPixelFormat::I422:
+      return (count * 2).value();
+    case VideoPixelFormat::I444:
+      return (count * 3).value();
+    case VideoPixelFormat::RGBA:
+    case VideoPixelFormat::RGBX:
+    case VideoPixelFormat::BGRA:
+    case VideoPixelFormat::BGRX:
+      return (count * 4).value();
+    case VideoPixelFormat::EndGuard_:
+      break;
+  }
+
+  MOZ_ASSERT_UNREACHABLE("unsupported format");
+  return 0;
+}
+
+bool VideoFrame::Format::IsYUV() const { return IsYUVFormat(mFormat); }
+
+/*
+ * VideoFrame::Resource
+ */
+
+VideoFrame::Resource::Resource(const RefPtr<layers::Image>& aImage,
+                               const class Format& aFormat)
+    : mImage(aImage), mFormat(aFormat) {
+  MOZ_ASSERT(mImage);
+}
+
+VideoFrame::Resource::Resource(const Resource& aOther)
+    : mImage(aOther.mImage), mFormat(aOther.mFormat) {
+  MOZ_ASSERT(mImage);
+}
+
+uint32_t VideoFrame::Resource::Stride(const Format::Plane& aPlane) const {
+  CheckedInt<uint32_t> width(mImage->GetSize().Width());
+  switch (aPlane) {
+    case Format::Plane::Y:  // and RGBA
+    case Format::Plane::A:
+      switch (mFormat.PixelFormat()) {
+        case VideoPixelFormat::I420:
+        case VideoPixelFormat::I420A:
+        case VideoPixelFormat::I422:
+        case VideoPixelFormat::I444:
+        case VideoPixelFormat::NV12:
+        case VideoPixelFormat::RGBA:
+        case VideoPixelFormat::RGBX:
+        case VideoPixelFormat::BGRA:
+        case VideoPixelFormat::BGRX:
+          return (width * mFormat.SampleBytes(aPlane)).value();
+        case VideoPixelFormat::EndGuard_:
+          MOZ_ASSERT_UNREACHABLE("invalid format");
+      }
+      return 0;
+    case Format::Plane::U:  // and UV
+    case Format::Plane::V:
+      switch (mFormat.PixelFormat()) {
+        case VideoPixelFormat::I420:
+        case VideoPixelFormat::I420A:
+        case VideoPixelFormat::I422:
+        case VideoPixelFormat::I444:
+        case VideoPixelFormat::NV12:
+          return (((width + 1) / 2) * mFormat.SampleBytes(aPlane)).value();
+        case VideoPixelFormat::RGBA:
+        case VideoPixelFormat::RGBX:
+        case VideoPixelFormat::BGRA:
+        case VideoPixelFormat::BGRX:
+        case VideoPixelFormat::EndGuard_:
+          MOZ_ASSERT_UNREACHABLE("invalid format");
+      }
+      return 0;
+  }
+  MOZ_ASSERT_UNREACHABLE("invalid plane");
+  return 0;
+}
+
+bool VideoFrame::Resource::CopyTo(const Format::Plane& aPlane,
+                                  const gfx::IntRect& aRect,
+                                  Span<uint8_t>&& aPlaneDest,
+                                  size_t aDestinationStride) const {
+  auto copyPlane = [&](const uint8_t* aPlaneData) {
+    MOZ_ASSERT(aPlaneData);
+
+    CheckedInt<size_t> offset(aRect.Y());
+    offset *= Stride(aPlane);
+    offset += aRect.X() * mFormat.SampleBytes(aPlane);
+    if (!offset.isValid()) {
+      return false;
+    }
+
+    CheckedInt<size_t> elementsBytes(aRect.Width());
+    elementsBytes *= mFormat.SampleBytes(aPlane);
+    if (!elementsBytes.isValid()) {
+      return false;
+    }
+
+    aPlaneData += offset.value();
+    for (int32_t row = 0; row < aRect.Height(); ++row) {
+      PodCopy(aPlaneDest.data(), aPlaneData, elementsBytes.value());
+      aPlaneData += Stride(aPlane);
+      // Spec asks to move `aDestinationStride` bytes instead of
+      // `Stride(aPlane)` forward.
+      aPlaneDest = aPlaneDest.From(aDestinationStride);
+    }
+    return true;
+  };
+
+  if (mImage->GetFormat() == ImageFormat::MOZ2D_SURFACE) {
+    RefPtr<gfx::SourceSurface> surface = mImage->GetAsSourceSurface();
+    if (NS_WARN_IF(!surface)) {
+      return false;
+    }
+
+    RefPtr<gfx::DataSourceSurface> dataSurface = surface->GetDataSurface();
+    if (NS_WARN_IF(!surface)) {
+      return false;
+    }
+
+    gfx::DataSourceSurface::ScopedMap map(dataSurface,
+                                          gfx::DataSourceSurface::READ);
+    if (NS_WARN_IF(!map.IsMapped())) {
+      return false;
+    }
+
+    const gfx::SurfaceFormat format = dataSurface->GetFormat();
+
+    if (format == gfx::SurfaceFormat::R8G8B8A8 ||
+        format == gfx::SurfaceFormat::R8G8B8X8 ||
+        format == gfx::SurfaceFormat::B8G8R8A8 ||
+        format == gfx::SurfaceFormat::B8G8R8X8) {
+      MOZ_ASSERT(aPlane == Format::Plane::RGBA);
+
+      // The mImage's format can be different from mFormat (since Gecko prefers
+      // BGRA). To get the data in the matched format, we create a temp buffer
+      // holding the image data in that format and then copy them to
+      // `aDestination`.
+      const gfx::SurfaceFormat f = mFormat.ToSurfaceFormat();
+      MOZ_ASSERT(f == gfx::SurfaceFormat::R8G8B8A8 ||
+                 f == gfx::SurfaceFormat::R8G8B8X8 ||
+                 f == gfx::SurfaceFormat::B8G8R8A8 ||
+                 f == gfx::SurfaceFormat::B8G8R8X8);
+
+      // TODO: We could use Factory::CreateWrappingDataSourceSurface to wrap
+      // `aDestination` to avoid extra copy.
+      RefPtr<gfx::DataSourceSurface> tempSurface =
+          gfx::Factory::CreateDataSourceSurfaceWithStride(
+              dataSurface->GetSize(), f, map.GetStride());
+      if (NS_WARN_IF(!tempSurface)) {
+        return false;
+      }
+
+      gfx::DataSourceSurface::ScopedMap tempMap(tempSurface,
+                                                gfx::DataSourceSurface::WRITE);
+      if (NS_WARN_IF(!tempMap.IsMapped())) {
+        return false;
+      }
+
+      if (!gfx::SwizzleData(map.GetData(), map.GetStride(),
+                            dataSurface->GetFormat(), tempMap.GetData(),
+                            tempMap.GetStride(), tempSurface->GetFormat(),
+                            tempSurface->GetSize())) {
+        return false;
+      }
+
+      return copyPlane(tempMap.GetData());
+    }
+
+    return false;
+  }
+
+  if (mImage->GetFormat() == ImageFormat::PLANAR_YCBCR) {
+    switch (aPlane) {
+      case Format::Plane::Y:
+        return copyPlane(mImage->AsPlanarYCbCrImage()->GetData()->mYChannel);
+      case Format::Plane::U:
+        return copyPlane(mImage->AsPlanarYCbCrImage()->GetData()->mCbChannel);
+      case Format::Plane::V:
+        return copyPlane(mImage->AsPlanarYCbCrImage()->GetData()->mCrChannel);
+      case Format::Plane::A:
+        MOZ_ASSERT(mFormat.PixelFormat() == VideoPixelFormat::I420A);
+        MOZ_ASSERT(mImage->AsPlanarYCbCrImage()->GetData()->mAlpha);
+        return copyPlane(
+            mImage->AsPlanarYCbCrImage()->GetData()->mAlpha->mChannel);
+    }
+    MOZ_ASSERT_UNREACHABLE("invalid plane");
+  }
+
+  if (mImage->GetFormat() == ImageFormat::NV_IMAGE) {
+    switch (aPlane) {
+      case Format::Plane::Y:
+        return copyPlane(mImage->AsNVImage()->GetData()->mYChannel);
+      case Format::Plane::UV:
+        return copyPlane(mImage->AsNVImage()->GetData()->mCbChannel);
+      case Format::Plane::V:
+      case Format::Plane::A:
+        MOZ_ASSERT_UNREACHABLE("invalid plane");
+    }
+  }
+
+  return false;
+}
+
+}  // namespace mozilla::dom
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