1 files changed, 599 insertions, 0 deletions

diff --git a/dom/media/MediaData.cpp b/dom/media/MediaData.cpp
new file mode 100644
index 0000000000..d1cfca35a9
--- /dev/null
+++ b/dom/media/MediaData.cpp
@@ -0,0 +1,599 @@
+/* -*- 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 "MediaData.h"
+
+#include "ImageContainer.h"
+#include "MediaInfo.h"
+#include "PerformanceRecorder.h"
+#include "VideoUtils.h"
+#include "YCbCrUtils.h"
+#include "mozilla/gfx/gfxVars.h"
+#include "mozilla/layers/ImageBridgeChild.h"
+#include "mozilla/layers/KnowsCompositor.h"
+#include "mozilla/layers/SharedRGBImage.h"
+
+#include <stdint.h>
+
+#ifdef XP_WIN
+#  include "mozilla/WindowsVersion.h"
+#  include "mozilla/gfx/DeviceManagerDx.h"
+#  include "mozilla/layers/D3D11ShareHandleImage.h"
+#  include "mozilla/layers/D3D11YCbCrImage.h"
+#elif XP_MACOSX
+#  include "MacIOSurfaceImage.h"
+#  include "mozilla/gfx/gfxVars.h"
+#endif
+
+namespace mozilla {
+
+using namespace mozilla::gfx;
+using layers::PlanarYCbCrData;
+using layers::PlanarYCbCrImage;
+using media::TimeUnit;
+
+const char* AudioData::sTypeName = "audio";
+const char* VideoData::sTypeName = "video";
+
+AudioData::AudioData(int64_t aOffset, const media::TimeUnit& aTime,
+                     AlignedAudioBuffer&& aData, uint32_t aChannels,
+                     uint32_t aRate, uint32_t aChannelMap)
+    // Passing TimeUnit::Zero() here because we can't pass the result of an
+    // arithmetic operation to the CheckedInt ctor. We set the duration in the
+    // ctor body below.
+    : MediaData(sType, aOffset, aTime, TimeUnit::Zero()),
+      mChannels(aChannels),
+      mChannelMap(aChannelMap),
+      mRate(aRate),
+      mOriginalTime(aTime),
+      mAudioData(std::move(aData)),
+      mFrames(mAudioData.Length() / aChannels) {
+  MOZ_RELEASE_ASSERT(aChannels != 0,
+                     "Can't create an AudioData with 0 channels.");
+  MOZ_RELEASE_ASSERT(aRate != 0,
+                     "Can't create an AudioData with a sample-rate of 0.");
+  mDuration = TimeUnit(mFrames, aRate);
+}
+
+Span<AudioDataValue> AudioData::Data() const {
+  return Span{GetAdjustedData(), mFrames * mChannels};
+}
+
+void AudioData::SetOriginalStartTime(const media::TimeUnit& aStartTime) {
+  MOZ_ASSERT(mTime == mOriginalTime,
+             "Do not call this if data has been trimmed!");
+  mTime = aStartTime;
+  mOriginalTime = aStartTime;
+}
+
+bool AudioData::AdjustForStartTime(const media::TimeUnit& aStartTime) {
+  mOriginalTime -= aStartTime;
+  mTime -= aStartTime;
+  if (mTrimWindow) {
+    *mTrimWindow -= aStartTime;
+  }
+  if (mTime.IsNegative()) {
+    NS_WARNING("Negative audio start time after time-adjustment!");
+  }
+  return mTime.IsValid() && mOriginalTime.IsValid();
+}
+
+bool AudioData::SetTrimWindow(const media::TimeInterval& aTrim) {
+  MOZ_DIAGNOSTIC_ASSERT(aTrim.mStart.IsValid() && aTrim.mEnd.IsValid(),
+                        "An overflow occurred on the provided TimeInterval");
+  if (!mAudioData) {
+    // MoveableData got called. Can no longer work on it.
+    return false;
+  }
+  if (aTrim.mStart < mOriginalTime || aTrim.mEnd > GetEndTime()) {
+    return false;
+  }
+
+  auto trimBefore = aTrim.mStart - mOriginalTime;
+  auto trimAfter = aTrim.mEnd - mOriginalTime;
+  if (!trimBefore.IsValid() || !trimAfter.IsValid()) {
+    // Overflow.
+    return false;
+  }
+  if (!mTrimWindow && trimBefore.IsZero() && trimAfter == mDuration) {
+    // Nothing to change, abort early to prevent rounding errors.
+    return true;
+  }
+
+  size_t frameOffset = trimBefore.ToTicksAtRate(mRate);
+  mTrimWindow = Some(aTrim);
+  mDataOffset = frameOffset * mChannels;
+  MOZ_DIAGNOSTIC_ASSERT(mDataOffset <= mAudioData.Length(),
+                        "Data offset outside original buffer");
+  mFrames = (trimAfter - trimBefore).ToTicksAtRate(mRate);
+  MOZ_DIAGNOSTIC_ASSERT(mFrames <= mAudioData.Length() / mChannels,
+                        "More frames than found in container");
+  mTime = mOriginalTime + trimBefore;
+  mDuration = TimeUnit(mFrames, mRate);
+
+  return true;
+}
+
+AudioDataValue* AudioData::GetAdjustedData() const {
+  if (!mAudioData) {
+    return nullptr;
+  }
+  return mAudioData.Data() + mDataOffset;
+}
+
+void AudioData::EnsureAudioBuffer() {
+  if (mAudioBuffer || !mAudioData) {
+    return;
+  }
+  const AudioDataValue* srcData = GetAdjustedData();
+  CheckedInt<size_t> bufferSize(sizeof(AudioDataValue));
+  bufferSize *= mFrames;
+  bufferSize *= mChannels;
+  mAudioBuffer = SharedBuffer::Create(bufferSize);
+
+  AudioDataValue* destData = static_cast<AudioDataValue*>(mAudioBuffer->Data());
+  for (uint32_t i = 0; i < mFrames; ++i) {
+    for (uint32_t j = 0; j < mChannels; ++j) {
+      destData[j * mFrames + i] = srcData[i * mChannels + j];
+    }
+  }
+}
+
+size_t AudioData::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
+  size_t size =
+      aMallocSizeOf(this) + mAudioData.SizeOfExcludingThis(aMallocSizeOf);
+  if (mAudioBuffer) {
+    size += mAudioBuffer->SizeOfIncludingThis(aMallocSizeOf);
+  }
+  return size;
+}
+
+AlignedAudioBuffer AudioData::MoveableData() {
+  // Trim buffer according to trimming mask.
+  mAudioData.PopFront(mDataOffset);
+  mAudioData.SetLength(mFrames * mChannels);
+  mDataOffset = 0;
+  mFrames = 0;
+  mTrimWindow.reset();
+  return std::move(mAudioData);
+}
+
+static bool ValidatePlane(const VideoData::YCbCrBuffer::Plane& aPlane) {
+  return aPlane.mWidth <= PlanarYCbCrImage::MAX_DIMENSION &&
+         aPlane.mHeight <= PlanarYCbCrImage::MAX_DIMENSION &&
+         aPlane.mWidth * aPlane.mHeight < MAX_VIDEO_WIDTH * MAX_VIDEO_HEIGHT &&
+         aPlane.mStride > 0 && aPlane.mWidth <= aPlane.mStride;
+}
+
+static bool ValidateBufferAndPicture(const VideoData::YCbCrBuffer& aBuffer,
+                                     const IntRect& aPicture) {
+  // The following situation should never happen unless there is a bug
+  // in the decoder
+  if (aBuffer.mPlanes[1].mWidth != aBuffer.mPlanes[2].mWidth ||
+      aBuffer.mPlanes[1].mHeight != aBuffer.mPlanes[2].mHeight) {
+    NS_ERROR("C planes with different sizes");
+    return false;
+  }
+
+  // The following situations could be triggered by invalid input
+  if (aPicture.width <= 0 || aPicture.height <= 0) {
+    NS_WARNING("Empty picture rect");
+    return false;
+  }
+  if (!ValidatePlane(aBuffer.mPlanes[0]) ||
+      !ValidatePlane(aBuffer.mPlanes[1]) ||
+      !ValidatePlane(aBuffer.mPlanes[2])) {
+    NS_WARNING("Invalid plane size");
+    return false;
+  }
+
+  // Ensure the picture size specified in the headers can be extracted out of
+  // the frame we've been supplied without indexing out of bounds.
+  CheckedUint32 xLimit = aPicture.x + CheckedUint32(aPicture.width);
+  CheckedUint32 yLimit = aPicture.y + CheckedUint32(aPicture.height);
+  if (!xLimit.isValid() || xLimit.value() > aBuffer.mPlanes[0].mStride ||
+      !yLimit.isValid() || yLimit.value() > aBuffer.mPlanes[0].mHeight) {
+    // The specified picture dimensions can't be contained inside the video
+    // frame, we'll stomp memory if we try to copy it. Fail.
+    NS_WARNING("Overflowing picture rect");
+    return false;
+  }
+  return true;
+}
+
+VideoData::VideoData(int64_t aOffset, const TimeUnit& aTime,
+                     const TimeUnit& aDuration, bool aKeyframe,
+                     const TimeUnit& aTimecode, IntSize aDisplay,
+                     layers::ImageContainer::FrameID aFrameID)
+    : MediaData(Type::VIDEO_DATA, aOffset, aTime, aDuration),
+      mDisplay(aDisplay),
+      mFrameID(aFrameID),
+      mSentToCompositor(false),
+      mNextKeyFrameTime(TimeUnit::Invalid()) {
+  MOZ_ASSERT(!mDuration.IsNegative(), "Frame must have non-negative duration.");
+  mKeyframe = aKeyframe;
+  mTimecode = aTimecode;
+}
+
+VideoData::~VideoData() = default;
+
+size_t VideoData::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
+  size_t size = aMallocSizeOf(this);
+
+  // Currently only PLANAR_YCBCR has a well defined function for determining
+  // it's size, so reporting is limited to that type.
+  if (mImage && mImage->GetFormat() == ImageFormat::PLANAR_YCBCR) {
+    const mozilla::layers::PlanarYCbCrImage* img =
+        static_cast<const mozilla::layers::PlanarYCbCrImage*>(mImage.get());
+    size += img->SizeOfIncludingThis(aMallocSizeOf);
+  }
+
+  return size;
+}
+
+ColorDepth VideoData::GetColorDepth() const {
+  if (!mImage) {
+    return ColorDepth::COLOR_8;
+  }
+
+  return mImage->GetColorDepth();
+}
+
+void VideoData::UpdateDuration(const TimeUnit& aDuration) {
+  MOZ_ASSERT(!aDuration.IsNegative());
+  mDuration = aDuration;
+}
+
+void VideoData::UpdateTimestamp(const TimeUnit& aTimestamp) {
+  MOZ_ASSERT(!aTimestamp.IsNegative());
+
+  auto updatedDuration = GetEndTime() - aTimestamp;
+  MOZ_ASSERT(!updatedDuration.IsNegative());
+
+  mTime = aTimestamp;
+  mDuration = updatedDuration;
+}
+
+bool VideoData::AdjustForStartTime(const media::TimeUnit& aStartTime) {
+  mTime -= aStartTime;
+  if (mTime.IsNegative()) {
+    NS_WARNING("Negative video start time after time-adjustment!");
+  }
+  return mTime.IsValid();
+}
+
+PlanarYCbCrData ConstructPlanarYCbCrData(const VideoInfo& aInfo,
+                                         const VideoData::YCbCrBuffer& aBuffer,
+                                         const IntRect& aPicture) {
+  const VideoData::YCbCrBuffer::Plane& Y = aBuffer.mPlanes[0];
+  const VideoData::YCbCrBuffer::Plane& Cb = aBuffer.mPlanes[1];
+  const VideoData::YCbCrBuffer::Plane& Cr = aBuffer.mPlanes[2];
+
+  PlanarYCbCrData data;
+  data.mYChannel = Y.mData;
+  data.mYStride = AssertedCast<int32_t>(Y.mStride);
+  data.mYSkip = AssertedCast<int32_t>(Y.mSkip);
+  data.mCbChannel = Cb.mData;
+  data.mCrChannel = Cr.mData;
+  data.mCbCrStride = AssertedCast<int32_t>(Cb.mStride);
+  data.mCbSkip = AssertedCast<int32_t>(Cb.mSkip);
+  data.mCrSkip = AssertedCast<int32_t>(Cr.mSkip);
+  data.mPictureRect = aPicture;
+  data.mStereoMode = aInfo.mStereoMode;
+  data.mYUVColorSpace = aBuffer.mYUVColorSpace;
+  data.mColorPrimaries = aBuffer.mColorPrimaries;
+  data.mColorDepth = aBuffer.mColorDepth;
+  if (aInfo.mTransferFunction) {
+    data.mTransferFunction = *aInfo.mTransferFunction;
+  }
+  data.mColorRange = aBuffer.mColorRange;
+  data.mChromaSubsampling = aBuffer.mChromaSubsampling;
+  return data;
+}
+
+/* static */
+bool VideoData::SetVideoDataToImage(PlanarYCbCrImage* aVideoImage,
+                                    const VideoInfo& aInfo,
+                                    const YCbCrBuffer& aBuffer,
+                                    const IntRect& aPicture, bool aCopyData) {
+  if (!aVideoImage) {
+    return false;
+  }
+
+  PlanarYCbCrData data = ConstructPlanarYCbCrData(aInfo, aBuffer, aPicture);
+
+  if (aCopyData) {
+    return aVideoImage->CopyData(data);
+  }
+  return aVideoImage->AdoptData(data);
+}
+
+/* static */
+bool VideoData::UseUseNV12ForSoftwareDecodedVideoIfPossible(
+    layers::KnowsCompositor* aAllocator) {
+#if XP_WIN
+  if (!aAllocator) {
+    return false;
+  }
+
+  if (StaticPrefs::gfx_video_convert_i420_to_nv12_force_enabled_AtStartup() ||
+      (gfx::DeviceManagerDx::Get()->CanUseNV12() &&
+       gfx::gfxVars::UseWebRenderDCompSwVideoOverlayWin() &&
+       aAllocator->GetCompositorUseDComp())) {
+    return true;
+  }
+#endif
+  return false;
+}
+
+/* static */
+already_AddRefed<VideoData> VideoData::CreateAndCopyData(
+    const VideoInfo& aInfo, ImageContainer* aContainer, int64_t aOffset,
+    const TimeUnit& aTime, const TimeUnit& aDuration,
+    const YCbCrBuffer& aBuffer, bool aKeyframe, const TimeUnit& aTimecode,
+    const IntRect& aPicture, layers::KnowsCompositor* aAllocator) {
+  if (!aContainer) {
+    // Create a dummy VideoData with no image. This gives us something to
+    // send to media streams if necessary.
+    RefPtr<VideoData> v(new VideoData(aOffset, aTime, aDuration, aKeyframe,
+                                      aTimecode, aInfo.mDisplay, 0));
+    return v.forget();
+  }
+
+  if (!ValidateBufferAndPicture(aBuffer, aPicture)) {
+    return nullptr;
+  }
+
+  PerformanceRecorder<PlaybackStage> perfRecorder(MediaStage::CopyDecodedVideo,
+                                                  aInfo.mImage.height);
+  RefPtr<VideoData> v(new VideoData(aOffset, aTime, aDuration, aKeyframe,
+                                    aTimecode, aInfo.mDisplay, 0));
+
+  // Currently our decoder only knows how to output to ImageFormat::PLANAR_YCBCR
+  // format.
+#if XP_WIN
+  // Copy to NV12 format D3D11ShareHandleImage when video overlay could be used
+  // with the video frame
+  if (UseUseNV12ForSoftwareDecodedVideoIfPossible(aAllocator)) {
+    PlanarYCbCrData data = ConstructPlanarYCbCrData(aInfo, aBuffer, aPicture);
+    RefPtr<layers::D3D11ShareHandleImage> d3d11Image =
+        layers::D3D11ShareHandleImage::MaybeCreateNV12ImageAndSetData(
+            aAllocator, aContainer, data);
+    if (d3d11Image) {
+      v->mImage = d3d11Image;
+      perfRecorder.Record();
+      return v.forget();
+    }
+  }
+
+  // We disable this code path on Windows version earlier of Windows 8 due to
+  // intermittent crashes with old drivers. See bug 1405110.
+  // D3D11YCbCrImage can only handle YCbCr images using 3 non-interleaved planes
+  // non-zero mSkip value indicates that one of the plane would be interleaved.
+  if (IsWin8OrLater() && !XRE_IsParentProcess() && aAllocator &&
+      aAllocator->SupportsD3D11() && aBuffer.mPlanes[0].mSkip == 0 &&
+      aBuffer.mPlanes[1].mSkip == 0 && aBuffer.mPlanes[2].mSkip == 0) {
+    RefPtr<layers::D3D11YCbCrImage> d3d11Image = new layers::D3D11YCbCrImage();
+    PlanarYCbCrData data = ConstructPlanarYCbCrData(aInfo, aBuffer, aPicture);
+    if (d3d11Image->SetData(layers::ImageBridgeChild::GetSingleton()
+                                ? layers::ImageBridgeChild::GetSingleton().get()
+                                : aAllocator,
+                            aContainer, data)) {
+      v->mImage = d3d11Image;
+      perfRecorder.Record();
+      return v.forget();
+    }
+  }
+#elif XP_MACOSX
+  if (aAllocator && aAllocator->GetWebRenderCompositorType() !=
+                        layers::WebRenderCompositor::SOFTWARE) {
+    RefPtr<layers::MacIOSurfaceImage> ioImage =
+        new layers::MacIOSurfaceImage(nullptr);
+    PlanarYCbCrData data = ConstructPlanarYCbCrData(aInfo, aBuffer, aPicture);
+    if (ioImage->SetData(aContainer, data)) {
+      v->mImage = ioImage;
+      perfRecorder.Record();
+      return v.forget();
+    }
+  }
+#endif
+  if (!v->mImage) {
+    v->mImage = aContainer->CreatePlanarYCbCrImage();
+  }
+
+  if (!v->mImage) {
+    return nullptr;
+  }
+  NS_ASSERTION(v->mImage->GetFormat() == ImageFormat::PLANAR_YCBCR,
+               "Wrong format?");
+  PlanarYCbCrImage* videoImage = v->mImage->AsPlanarYCbCrImage();
+  MOZ_ASSERT(videoImage);
+
+  if (!VideoData::SetVideoDataToImage(videoImage, aInfo, aBuffer, aPicture,
+                                      true /* aCopyData */)) {
+    return nullptr;
+  }
+
+  perfRecorder.Record();
+  return v.forget();
+}
+
+/* static */
+already_AddRefed<VideoData> VideoData::CreateAndCopyData(
+    const VideoInfo& aInfo, ImageContainer* aContainer, int64_t aOffset,
+    const TimeUnit& aTime, const TimeUnit& aDuration,
+    const YCbCrBuffer& aBuffer, const YCbCrBuffer::Plane& aAlphaPlane,
+    bool aKeyframe, const TimeUnit& aTimecode, const IntRect& aPicture) {
+  if (!aContainer) {
+    // Create a dummy VideoData with no image. This gives us something to
+    // send to media streams if necessary.
+    RefPtr<VideoData> v(new VideoData(aOffset, aTime, aDuration, aKeyframe,
+                                      aTimecode, aInfo.mDisplay, 0));
+    return v.forget();
+  }
+
+  if (!ValidateBufferAndPicture(aBuffer, aPicture)) {
+    return nullptr;
+  }
+
+  RefPtr<VideoData> v(new VideoData(aOffset, aTime, aDuration, aKeyframe,
+                                    aTimecode, aInfo.mDisplay, 0));
+
+  // Convert from YUVA to BGRA format on the software side.
+  RefPtr<layers::SharedRGBImage> videoImage =
+      aContainer->CreateSharedRGBImage();
+  v->mImage = videoImage;
+
+  if (!v->mImage) {
+    return nullptr;
+  }
+  if (!videoImage->Allocate(
+          IntSize(aBuffer.mPlanes[0].mWidth, aBuffer.mPlanes[0].mHeight),
+          SurfaceFormat::B8G8R8A8)) {
+    return nullptr;
+  }
+
+  RefPtr<layers::TextureClient> texture =
+      videoImage->GetTextureClient(/* aKnowsCompositor */ nullptr);
+  if (!texture) {
+    NS_WARNING("Failed to allocate TextureClient");
+    return nullptr;
+  }
+
+  layers::TextureClientAutoLock autoLock(texture,
+                                         layers::OpenMode::OPEN_WRITE_ONLY);
+  if (!autoLock.Succeeded()) {
+    NS_WARNING("Failed to lock TextureClient");
+    return nullptr;
+  }
+
+  layers::MappedTextureData buffer;
+  if (!texture->BorrowMappedData(buffer)) {
+    NS_WARNING("Failed to borrow mapped data");
+    return nullptr;
+  }
+
+  // The naming convention for libyuv and associated utils is word-order.
+  // The naming convention in the gfx stack is byte-order.
+  ConvertI420AlphaToARGB(aBuffer.mPlanes[0].mData, aBuffer.mPlanes[1].mData,
+                         aBuffer.mPlanes[2].mData, aAlphaPlane.mData,
+                         AssertedCast<int>(aBuffer.mPlanes[0].mStride),
+                         AssertedCast<int>(aBuffer.mPlanes[1].mStride),
+                         buffer.data, buffer.stride, buffer.size.width,
+                         buffer.size.height);
+
+  return v.forget();
+}
+
+/* static */
+already_AddRefed<VideoData> VideoData::CreateFromImage(
+    const IntSize& aDisplay, int64_t aOffset, const TimeUnit& aTime,
+    const TimeUnit& aDuration, const RefPtr<Image>& aImage, bool aKeyframe,
+    const TimeUnit& aTimecode) {
+  RefPtr<VideoData> v(new VideoData(aOffset, aTime, aDuration, aKeyframe,
+                                    aTimecode, aDisplay, 0));
+  v->mImage = aImage;
+  return v.forget();
+}
+
+MediaRawData::MediaRawData()
+    : MediaData(Type::RAW_DATA), mCrypto(mCryptoInternal) {}
+
+MediaRawData::MediaRawData(const uint8_t* aData, size_t aSize)
+    : MediaData(Type::RAW_DATA),
+      mCrypto(mCryptoInternal),
+      mBuffer(aData, aSize) {}
+
+MediaRawData::MediaRawData(const uint8_t* aData, size_t aSize,
+                           const uint8_t* aAlphaData, size_t aAlphaSize)
+    : MediaData(Type::RAW_DATA),
+      mCrypto(mCryptoInternal),
+      mBuffer(aData, aSize),
+      mAlphaBuffer(aAlphaData, aAlphaSize) {}
+
+MediaRawData::MediaRawData(AlignedByteBuffer&& aData)
+    : MediaData(Type::RAW_DATA),
+      mCrypto(mCryptoInternal),
+      mBuffer(std::move(aData)) {}
+
+MediaRawData::MediaRawData(AlignedByteBuffer&& aData,
+                           AlignedByteBuffer&& aAlphaData)
+    : MediaData(Type::RAW_DATA),
+      mCrypto(mCryptoInternal),
+      mBuffer(std::move(aData)),
+      mAlphaBuffer(std::move(aAlphaData)) {}
+
+already_AddRefed<MediaRawData> MediaRawData::Clone() const {
+  int32_t sampleHeight = 0;
+  if (mTrackInfo && mTrackInfo->GetAsVideoInfo()) {
+    sampleHeight = mTrackInfo->GetAsVideoInfo()->mImage.height;
+  }
+  PerformanceRecorder<PlaybackStage> perfRecorder(MediaStage::CopyDemuxedData,
+                                                  sampleHeight);
+  RefPtr<MediaRawData> s = new MediaRawData;
+  s->mTimecode = mTimecode;
+  s->mTime = mTime;
+  s->mDuration = mDuration;
+  s->mOffset = mOffset;
+  s->mKeyframe = mKeyframe;
+  s->mExtraData = mExtraData;
+  s->mCryptoInternal = mCryptoInternal;
+  s->mTrackInfo = mTrackInfo;
+  s->mEOS = mEOS;
+  s->mOriginalPresentationWindow = mOriginalPresentationWindow;
+  if (!s->mBuffer.Append(mBuffer.Data(), mBuffer.Length())) {
+    return nullptr;
+  }
+  if (!s->mAlphaBuffer.Append(mAlphaBuffer.Data(), mAlphaBuffer.Length())) {
+    return nullptr;
+  }
+  perfRecorder.Record();
+  return s.forget();
+}
+
+MediaRawData::~MediaRawData() = default;
+
+size_t MediaRawData::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
+  size_t size = aMallocSizeOf(this);
+  size += mBuffer.SizeOfExcludingThis(aMallocSizeOf);
+  return size;
+}
+
+UniquePtr<MediaRawDataWriter> MediaRawData::CreateWriter() {
+  UniquePtr<MediaRawDataWriter> p(new MediaRawDataWriter(this));
+  return p;
+}
+
+MediaRawDataWriter::MediaRawDataWriter(MediaRawData* aMediaRawData)
+    : mCrypto(aMediaRawData->mCryptoInternal), mTarget(aMediaRawData) {}
+
+bool MediaRawDataWriter::SetSize(size_t aSize) {
+  return mTarget->mBuffer.SetLength(aSize);
+}
+
+bool MediaRawDataWriter::Prepend(const uint8_t* aData, size_t aSize) {
+  return mTarget->mBuffer.Prepend(aData, aSize);
+}
+
+bool MediaRawDataWriter::Append(const uint8_t* aData, size_t aSize) {
+  return mTarget->mBuffer.Append(aData, aSize);
+}
+
+bool MediaRawDataWriter::Replace(const uint8_t* aData, size_t aSize) {
+  return mTarget->mBuffer.Replace(aData, aSize);
+}
+
+void MediaRawDataWriter::Clear() { mTarget->mBuffer.Clear(); }
+
+uint8_t* MediaRawDataWriter::Data() { return mTarget->mBuffer.Data(); }
+
+size_t MediaRawDataWriter::Size() { return mTarget->Size(); }
+
+void MediaRawDataWriter::PopFront(size_t aSize) {
+  mTarget->mBuffer.PopFront(aSize);
+}
+
+}  // namespace mozilla