mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-19 08:15:31 +00:00
804b8b8883
# skip-blame Differential Revision: https://phabricator.services.mozilla.com/D12251 --HG-- extra : moz-landing-system : lando
77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
/* -*- 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/. */
|
|
|
|
#ifndef BOX_H_
|
|
#define BOX_H_
|
|
|
|
#include <stdint.h>
|
|
#include "nsTArray.h"
|
|
#include "MediaResource.h"
|
|
#include "mozilla/EndianUtils.h"
|
|
#include "AtomType.h"
|
|
#include "BufferReader.h"
|
|
|
|
namespace mozilla {
|
|
class ByteStream;
|
|
|
|
class BoxContext {
|
|
public:
|
|
BoxContext(ByteStream* aSource, const MediaByteRangeSet& aByteRanges)
|
|
: mSource(aSource), mByteRanges(aByteRanges) {}
|
|
|
|
RefPtr<ByteStream> mSource;
|
|
const MediaByteRangeSet& mByteRanges;
|
|
};
|
|
|
|
class Box {
|
|
public:
|
|
Box(BoxContext* aContext, uint64_t aOffset, const Box* aParent = nullptr);
|
|
Box();
|
|
|
|
bool IsAvailable() const { return !mRange.IsEmpty(); }
|
|
uint64_t Offset() const { return mRange.mStart; }
|
|
uint64_t Length() const { return mRange.mEnd - mRange.mStart; }
|
|
uint64_t NextOffset() const { return mRange.mEnd; }
|
|
const MediaByteRange& Range() const { return mRange; }
|
|
const Box* Parent() const { return mParent; }
|
|
bool IsType(const char* aType) const { return mType == AtomType(aType); }
|
|
|
|
Box Next() const;
|
|
Box FirstChild() const;
|
|
nsTArray<uint8_t> Read() const;
|
|
bool Read(nsTArray<uint8_t>* aDest, const MediaByteRange& aRange) const;
|
|
|
|
static const uint64_t kMAX_BOX_READ;
|
|
|
|
const nsTArray<uint8_t>& Header() const { return mHeader; }
|
|
|
|
private:
|
|
bool Contains(MediaByteRange aRange) const;
|
|
BoxContext* mContext;
|
|
mozilla::MediaByteRange mRange;
|
|
uint64_t mBodyOffset;
|
|
uint64_t mChildOffset;
|
|
AtomType mType;
|
|
nsTArray<uint8_t> mHeader;
|
|
const Box* mParent;
|
|
};
|
|
|
|
// BoxReader takes a copy of a box contents and serves through an
|
|
// AutoByteReader.
|
|
class MOZ_RAII BoxReader {
|
|
public:
|
|
explicit BoxReader(Box& aBox)
|
|
: mBuffer(aBox.Read()), mReader(mBuffer.Elements(), mBuffer.Length()) {}
|
|
BufferReader* operator->() { return &mReader; }
|
|
|
|
private:
|
|
nsTArray<uint8_t> mBuffer;
|
|
BufferReader mReader;
|
|
};
|
|
} // namespace mozilla
|
|
|
|
#endif
|