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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#ifndef MOZILLA_VIDEOSEGMENT_H_
#define MOZILLA_VIDEOSEGMENT_H_
#include "MediaSegment.h"
#include "nsCOMPtr.h"
#include "gfxPoint.h"
#include "ImageContainer.h"
namespace mozilla {
namespace layers {
class Image;
} // namespace layers
class VideoFrame {
public:
typedef mozilla::layers::Image Image;
VideoFrame(already_AddRefed<Image> aImage,
const gfx::IntSize& aIntrinsicSize);
VideoFrame();
~VideoFrame();
bool operator==(const VideoFrame& aFrame) const {
return mIntrinsicSize == aFrame.mIntrinsicSize &&
mForceBlack == aFrame.mForceBlack &&
((mForceBlack && aFrame.mForceBlack) || mImage == aFrame.mImage) &&
mPrincipalHandle == aFrame.mPrincipalHandle;
}
bool operator!=(const VideoFrame& aFrame) const {
return !operator==(aFrame);
}
Image* GetImage() const { return mImage; }
void SetForceBlack(bool aForceBlack) { mForceBlack = aForceBlack; }
bool GetForceBlack() const { return mForceBlack; }
void SetPrincipalHandle(PrincipalHandle aPrincipalHandle) {
mPrincipalHandle = std::forward<PrincipalHandle>(aPrincipalHandle);
}
const PrincipalHandle& GetPrincipalHandle() const { return mPrincipalHandle; }
const gfx::IntSize& GetIntrinsicSize() const { return mIntrinsicSize; }
void SetNull();
void TakeFrom(VideoFrame* aFrame);
// Create a planar YCbCr black image.
static already_AddRefed<Image> CreateBlackImage(const gfx::IntSize& aSize);
protected:
// mImage can be null to indicate "no video" (aka "empty frame"). It can
// still have an intrinsic size in this case.
RefPtr<Image> mImage;
// The desired size to render the video frame at.
gfx::IntSize mIntrinsicSize;
bool mForceBlack;
// principalHandle for the image in this frame.
// This can be compared to an nsIPrincipal when back on main thread.
PrincipalHandle mPrincipalHandle;
};
struct VideoChunk {
void SliceTo(TrackTime aStart, TrackTime aEnd) {
NS_ASSERTION(aStart >= 0 && aStart < aEnd && aEnd <= mDuration,
"Slice out of bounds");
mDuration = aEnd - aStart;
}
TrackTime GetDuration() const { return mDuration; }
bool CanCombineWithFollowing(const VideoChunk& aOther) const {
return aOther.mFrame == mFrame;
}
bool IsNull() const { return !mFrame.GetImage(); }
void SetNull(TrackTime aDuration) {
mDuration = aDuration;
mFrame.SetNull();
mTimeStamp = TimeStamp();
}
void SetForceBlack(bool aForceBlack) { mFrame.SetForceBlack(aForceBlack); }
size_t SizeOfExcludingThisIfUnshared(MallocSizeOf aMallocSizeOf) const {
// Future:
// - mFrame
return 0;
}
const PrincipalHandle& GetPrincipalHandle() const {
return mFrame.GetPrincipalHandle();
}
TrackTime mDuration;
VideoFrame mFrame;
TimeStamp mTimeStamp;
};
class VideoSegment : public MediaSegmentBase<VideoSegment, VideoChunk> {
public:
typedef mozilla::layers::Image Image;
typedef mozilla::gfx::IntSize IntSize;
VideoSegment();
VideoSegment(VideoSegment&& aSegment);
VideoSegment(const VideoSegment&) = delete;
VideoSegment& operator=(const VideoSegment&) = delete;
~VideoSegment();
void AppendFrame(already_AddRefed<Image>&& aImage,
const IntSize& aIntrinsicSize,
const PrincipalHandle& aPrincipalHandle,
bool aForceBlack = false,
TimeStamp aTimeStamp = TimeStamp::Now());
void ExtendLastFrameBy(TrackTime aDuration) {
if (aDuration <= 0) {
return;
}
if (mChunks.IsEmpty()) {
mChunks.AppendElement()->SetNull(aDuration);
} else {
mChunks[mChunks.Length() - 1].mDuration += aDuration;
}
mDuration += aDuration;
}
const VideoFrame* GetLastFrame(TrackTime* aStart = nullptr) {
VideoChunk* c = GetLastChunk();
if (!c) {
return nullptr;
}
if (aStart) {
*aStart = mDuration - c->mDuration;
}
return &c->mFrame;
}
VideoChunk* FindChunkContaining(const TimeStamp& aTime) {
VideoChunk* previousChunk = nullptr;
for (VideoChunk& c : mChunks) {
if (c.mTimeStamp.IsNull()) {
continue;
}
if (c.mTimeStamp > aTime) {
return previousChunk;
}
previousChunk = &c;
}
return previousChunk;
}
void ForgetUpToTime(const TimeStamp& aTime) {
VideoChunk* chunk = FindChunkContaining(aTime);
if (!chunk) {
return;
}
TrackTime duration = 0;
size_t chunksToRemove = 0;
for (const VideoChunk& c : mChunks) {
if (c.mTimeStamp >= chunk->mTimeStamp) {
break;
}
duration += c.GetDuration();
++chunksToRemove;
}
mChunks.RemoveElementsAt(0, chunksToRemove);
mDuration -= duration;
MOZ_ASSERT(mChunks.Capacity() >= DEFAULT_SEGMENT_CAPACITY,
"Capacity must be retained after removing chunks");
}
// Override default impl
void ReplaceWithDisabled() override {
for (ChunkIterator i(*this); !i.IsEnded(); i.Next()) {
VideoChunk& chunk = *i;
chunk.SetForceBlack(true);
}
}
// Segment-generic methods not in MediaSegmentBase
static Type StaticType() { return VIDEO; }
size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override {
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
}
};
} // namespace mozilla
#endif /* MOZILLA_VIDEOSEGMENT_H_ */