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113 lines
2.8 KiB
C++
113 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MOZILLA_VIDEOSEGMENT_H_
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#define MOZILLA_VIDEOSEGMENT_H_
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#include "MediaSegment.h"
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#include "nsCOMPtr.h"
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#include "gfxPoint.h"
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#include "nsAutoPtr.h"
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#include "ImageContainer.h"
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namespace mozilla {
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namespace layers {
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class Image;
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}
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class VideoFrame {
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public:
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typedef mozilla::layers::Image Image;
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VideoFrame(already_AddRefed<Image> aImage, const gfxIntSize& aIntrinsicSize);
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VideoFrame();
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~VideoFrame();
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bool operator==(const VideoFrame& aFrame) const
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{
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return mImage == aFrame.mImage && mIntrinsicSize == aFrame.mIntrinsicSize;
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}
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bool operator!=(const VideoFrame& aFrame) const
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{
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return !operator==(aFrame);
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}
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Image* GetImage() const { return mImage; }
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const gfxIntSize& GetIntrinsicSize() const { return mIntrinsicSize; }
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void SetNull();
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void TakeFrom(VideoFrame* aFrame);
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protected:
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// mImage can be null to indicate "no video" (aka "empty frame"). It can
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// still have an intrinsic size in this case.
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nsRefPtr<Image> mImage;
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// The desired size to render the video frame at.
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gfxIntSize mIntrinsicSize;
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};
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struct VideoChunk {
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VideoChunk();
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~VideoChunk();
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void SliceTo(TrackTicks aStart, TrackTicks aEnd)
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{
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NS_ASSERTION(aStart >= 0 && aStart < aEnd && aEnd <= mDuration,
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"Slice out of bounds");
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mDuration = aEnd - aStart;
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}
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TrackTicks GetDuration() const { return mDuration; }
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bool CanCombineWithFollowing(const VideoChunk& aOther) const
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{
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return aOther.mFrame == mFrame;
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}
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bool IsNull() const { return !mFrame.GetImage(); }
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void SetNull(TrackTicks aDuration)
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{
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mDuration = aDuration;
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mFrame.SetNull();
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}
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TrackTicks mDuration;
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VideoFrame mFrame;
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};
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class VideoSegment : public MediaSegmentBase<VideoSegment, VideoChunk> {
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public:
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typedef mozilla::layers::Image Image;
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VideoSegment();
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~VideoSegment();
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void AppendFrame(already_AddRefed<Image> aImage, TrackTicks aDuration,
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const gfxIntSize& aIntrinsicSize);
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const VideoFrame* GetFrameAt(TrackTicks aOffset, TrackTicks* aStart = nullptr)
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{
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VideoChunk* c = FindChunkContaining(aOffset, aStart);
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if (!c) {
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return nullptr;
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}
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return &c->mFrame;
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}
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const VideoFrame* GetLastFrame(TrackTicks* aStart = nullptr)
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{
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VideoChunk* c = GetLastChunk();
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if (!c) {
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return nullptr;
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}
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if (aStart) {
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*aStart = mDuration - c->mDuration;
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}
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return &c->mFrame;
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}
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// Segment-generic methods not in MediaSegmentBase
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static Type StaticType() { return VIDEO; }
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};
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}
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#endif /* MOZILLA_VIDEOSEGMENT_H_ */
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