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/* -*- 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 "mp4_demuxer/AtomType.h"
#include "mp4_demuxer/BufferReader.h"
using namespace mozilla;
namespace mp4_demuxer {
class Stream;
class BoxContext
{
public:
BoxContext(Stream* aSource, const MediaByteRangeSet& aByteRanges)
: mSource(aSource), mByteRanges(aByteRanges)
{
}
RefPtr<Stream> 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();
bool Read(nsTArray<uint8_t>* aDest, const MediaByteRange& aRange);
static const uint64_t kMAX_BOX_READ;
private:
bool Contains(MediaByteRange aRange) const;
BoxContext* mContext;
mozilla::MediaByteRange mRange;
uint64_t mBodyOffset;
uint64_t mChildOffset;
AtomType mType;
const Box* mParent;
};
// BoxReader takes a copy of a box contents and serves through an AutoByteReader.
MOZ_RAII
class 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;
};
}
#endif
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