1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/VideoSegment.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,140 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.7 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef MOZILLA_VIDEOSEGMENT_H_
1.10 +#define MOZILLA_VIDEOSEGMENT_H_
1.11 +
1.12 +#include "MediaSegment.h"
1.13 +#include "nsCOMPtr.h"
1.14 +#include "gfxPoint.h"
1.15 +#include "nsAutoPtr.h"
1.16 +#include "ImageContainer.h"
1.17 +
1.18 +namespace mozilla {
1.19 +
1.20 +namespace layers {
1.21 +class Image;
1.22 +}
1.23 +
1.24 +class VideoFrame {
1.25 +public:
1.26 + typedef mozilla::layers::Image Image;
1.27 +
1.28 + VideoFrame(already_AddRefed<Image>& aImage, const gfxIntSize& aIntrinsicSize);
1.29 + VideoFrame();
1.30 + ~VideoFrame();
1.31 +
1.32 + bool operator==(const VideoFrame& aFrame) const
1.33 + {
1.34 + return mIntrinsicSize == aFrame.mIntrinsicSize &&
1.35 + mForceBlack == aFrame.mForceBlack &&
1.36 + ((mForceBlack && aFrame.mForceBlack) || mImage == aFrame.mImage);
1.37 + }
1.38 + bool operator!=(const VideoFrame& aFrame) const
1.39 + {
1.40 + return !operator==(aFrame);
1.41 + }
1.42 +
1.43 + Image* GetImage() const { return mImage; }
1.44 + void SetForceBlack(bool aForceBlack) { mForceBlack = aForceBlack; }
1.45 + bool GetForceBlack() const { return mForceBlack; }
1.46 + const gfxIntSize& GetIntrinsicSize() const { return mIntrinsicSize; }
1.47 + void SetNull();
1.48 + void TakeFrom(VideoFrame* aFrame);
1.49 +
1.50 +protected:
1.51 + // mImage can be null to indicate "no video" (aka "empty frame"). It can
1.52 + // still have an intrinsic size in this case.
1.53 + nsRefPtr<Image> mImage;
1.54 + // The desired size to render the video frame at.
1.55 + gfxIntSize mIntrinsicSize;
1.56 + bool mForceBlack;
1.57 +};
1.58 +
1.59 +struct VideoChunk {
1.60 + VideoChunk();
1.61 + ~VideoChunk();
1.62 + void SliceTo(TrackTicks aStart, TrackTicks aEnd)
1.63 + {
1.64 + NS_ASSERTION(aStart >= 0 && aStart < aEnd && aEnd <= mDuration,
1.65 + "Slice out of bounds");
1.66 + mDuration = aEnd - aStart;
1.67 + }
1.68 + TrackTicks GetDuration() const { return mDuration; }
1.69 + bool CanCombineWithFollowing(const VideoChunk& aOther) const
1.70 + {
1.71 + return aOther.mFrame == mFrame;
1.72 + }
1.73 + bool IsNull() const { return !mFrame.GetImage(); }
1.74 + void SetNull(TrackTicks aDuration)
1.75 + {
1.76 + mDuration = aDuration;
1.77 + mFrame.SetNull();
1.78 + mTimeStamp = TimeStamp();
1.79 + }
1.80 + void SetForceBlack(bool aForceBlack) { mFrame.SetForceBlack(aForceBlack); }
1.81 +
1.82 + size_t SizeOfExcludingThisIfUnshared(MallocSizeOf aMallocSizeOf) const
1.83 + {
1.84 + // Future:
1.85 + // - mFrame
1.86 + return 0;
1.87 + }
1.88 +
1.89 + TrackTicks mDuration;
1.90 + VideoFrame mFrame;
1.91 + mozilla::TimeStamp mTimeStamp;
1.92 +};
1.93 +
1.94 +class VideoSegment : public MediaSegmentBase<VideoSegment, VideoChunk> {
1.95 +public:
1.96 + typedef mozilla::layers::Image Image;
1.97 + typedef mozilla::gfx::IntSize IntSize;
1.98 +
1.99 + VideoSegment();
1.100 + ~VideoSegment();
1.101 +
1.102 + void AppendFrame(already_AddRefed<Image>&& aImage, TrackTicks aDuration,
1.103 + const IntSize& aIntrinsicSize);
1.104 + const VideoFrame* GetFrameAt(TrackTicks aOffset, TrackTicks* aStart = nullptr)
1.105 + {
1.106 + VideoChunk* c = FindChunkContaining(aOffset, aStart);
1.107 + if (!c) {
1.108 + return nullptr;
1.109 + }
1.110 + return &c->mFrame;
1.111 + }
1.112 + const VideoFrame* GetLastFrame(TrackTicks* aStart = nullptr)
1.113 + {
1.114 + VideoChunk* c = GetLastChunk();
1.115 + if (!c) {
1.116 + return nullptr;
1.117 + }
1.118 + if (aStart) {
1.119 + *aStart = mDuration - c->mDuration;
1.120 + }
1.121 + return &c->mFrame;
1.122 + }
1.123 + // Override default impl
1.124 + virtual void ReplaceWithDisabled() MOZ_OVERRIDE {
1.125 + for (ChunkIterator i(*this);
1.126 + !i.IsEnded(); i.Next()) {
1.127 + VideoChunk& chunk = *i;
1.128 + chunk.SetForceBlack(true);
1.129 + }
1.130 + }
1.131 +
1.132 + // Segment-generic methods not in MediaSegmentBase
1.133 + static Type StaticType() { return VIDEO; }
1.134 +
1.135 + virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE
1.136 + {
1.137 + return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
1.138 + }
1.139 +};
1.140 +
1.141 +}
1.142 +
1.143 +#endif /* MOZILLA_VIDEOSEGMENT_H_ */
