// We can make our own handler.
public Mpeg4IsoHandlerBox(ByteVector handlerType, string name, Mpeg4Box parent) : base("hdlr", 0, parent)
{
if (handlerType != null)
this.handlerType = handlerType.Mid(0, 4);
this.name = name;
}
// Replace this box with another one.
public void ReplaceWith(Mpeg4Box box)
{
if (Parent != null)
{
Parent.ReplaceChild(this, box);
}
}
public Mpeg4AppleDataBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
// Ensure that the data is loaded before the file is closed.
// Get the box data based on position and size offsets
LoadBoxData(4, -4);
}
public Mpeg4AppleDataBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
// Ensure that the data is loaded before the file is closed.
// Get the box data based on position and size offsets
LoadBoxData(4, -4);
}
// If the file is readable and the box can have children and there is
// enough space to read the data, get the next box by reading from the end
// of the first box.
private Mpeg4Box NextChild(Mpeg4Box child)
{
if (HasChildren && this.File != null && child.NextBoxPosition >= DataPosition && child.NextBoxPosition < NextBoxPosition)
{
return(Mpeg4Box.Create(File, child.NextBoxPosition, this));
}
return(null);
}
protected Mpeg4FullBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
File.Seek(base.DataPosition);
// First 4 buffer contain version and flag data.
version = File.ReadBlock(1)[0];
flags = File.ReadBlock(3).ToUInt();
}
public Mpeg4IsoChunkLargeOffsetBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
File.Seek(base.DataPosition);
offsets = new List<ulong>((int)File.ReadBlock(4).ToUInt());
for (int i = 0; i < offsets.Count; i++)
offsets[i] = (ulong)File.ReadBlock(4).ToLong();
}
protected Mpeg4FullBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
File.Seek(base.DataPosition);
// First 4 buffer contain version and flag data.
version = File.ReadBlock(1)[0];
flags = File.ReadBlock(3).ToUInt();
}
// We can make our own handler.
public Mpeg4IsoHandlerBox(ByteVector handlerType, string name, Mpeg4Box parent) : base("hdlr", 0, parent)
{
if (handlerType != null)
{
this.handlerType = handlerType.Mid(0, 4);
}
this.name = name;
}
public Mpeg4IsoSampleDescriptionBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
File.Seek(base.DataPosition);
// This box just contains a number saying how many of the first boxes
// will be SampleEntries, since they can be named whatever they want to
// be.
entryCount = File.ReadBlock(4).ToUInt();
}
public Mpeg4IsoAudioSampleEntry(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
File.Seek(base.DataPosition + 8);
channelCount = (ushort)File.ReadBlock(2).ToShort();
sampleSize = (ushort)File.ReadBlock(2).ToShort();
File.Seek(base.DataPosition + 16);
sampleRate = (uint)File.ReadBlock(4).ToUInt();
}
public Mpeg4IsoAudioSampleEntry(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
File.Seek(base.DataPosition + 8);
channelCount = (ushort)File.ReadBlock(2).ToShort();
sampleSize = (ushort)File.ReadBlock(2).ToShort();
File.Seek(base.DataPosition + 16);
sampleRate = (uint)File.ReadBlock(4).ToUInt();
}
public Mpeg4IsoSampleDescriptionBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
File.Seek(base.DataPosition);
// This box just contains a number saying how many of the first boxes
// will be SampleEntries, since they can be named whatever they want to
// be.
entryCount = File.ReadBlock(4).ToUInt();
}
public Mpeg4IsoChunkOffsetBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
File.Seek(base.DataPosition);
offsets = new List<uint>((int)File.ReadBlock(4).ToUInt());
//new uint[(int)File.ReadBlock(4).ToUInt()];
for (int i = 0; i < offsets.Count; i++)
offsets[i] = File.ReadBlock(4).ToUInt();
}
public Mpeg4IsoChunkLargeOffsetBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
File.Seek(base.DataPosition);
offsets = new List <ulong>((int)File.ReadBlock(4).ToUInt());
for (int i = 0; i < offsets.Count; i++)
{
offsets[i] = (ulong)File.ReadBlock(4).ToLong();
}
}
public Mpeg4IsoChunkOffsetBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
File.Seek(base.DataPosition);
offsets = new List <uint>((int)File.ReadBlock(4).ToUInt());
//new uint[(int)File.ReadBlock(4).ToUInt()];
for (int i = 0; i < offsets.Count; i++)
{
offsets[i] = File.ReadBlock(4).ToUInt();
}
}
public Mpeg4IsoHandlerBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
// Reserved
File.Seek(base.DataPosition + 4);
// Read the handler type.
handlerType = File.ReadBlock(4);
// Reserved
File.Seek(base.DataPosition + 20);
// Find the terminating byte and read a string from the data before it.
long end = File.Find((byte)0, File.Tell);
name = File.ReadBlock((int)(end - File.Tell)).ToString();
}
// Replace a child with a new one.
public void ReplaceChild(Mpeg4Box oldChild, Mpeg4Box newChild)
{
int index = children.IndexOf(oldChild);
if (index >= 0)
{
children[index] = newChild;
oldChild.Parent = null;
newChild.Parent = this;
}
else
{
AddChild(newChild);
}
}
public Mpeg4Box(Mpeg4BoxHeader header, Mpeg4Box parent)
{
// Initialize everything.
this.header = header;
this.parent = parent;
//this.data = null;
//this.children = new ArrayList();
//this.loadChildrenStarted = false;
// This was necessary after refactoring the File, DataPosition and DataSize
// properties so that they are no longer virtual
if (header != null && file == null)
{
this.file = header.File;
}
}
public Mpeg4Box(Mpeg4BoxHeader header, Mpeg4Box parent)
{
// Initialize everything.
this.header = header;
this.parent = parent;
//this.data = null;
//this.children = new ArrayList();
//this.loadChildrenStarted = false;
// This was necessary after refactoring the File, DataPosition and DataSize
// properties so that they are no longer virtual
if (header != null && file == null)
{
this.file = header.File;
}
}
public Mpeg4IsoHandlerBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
// Reserved
File.Seek(base.DataPosition + 4);
// Read the handler type.
handlerType = File.ReadBlock(4);
// Reserved
File.Seek(base.DataPosition + 20);
// Find the terminating byte and read a string from the data before it.
long end = File.Find((byte)0, File.Tell);
name = File.ReadBlock((int)(end - File.Tell)).ToString();
}
// Load this box'field children as well as their children.
public void LoadChildren()
{
if (!HasChildren || children.Count != 0 || loadChildrenStarted)
{
return;
}
loadChildrenStarted = true;
Mpeg4Box box = FirstChild;
while (box != null)
{
box.LoadChildren();
children.Add(box);
box = NextChild(box);
}
}
// Recursively find the first child with a given System.Type giving
// preference to the current depth.
public Mpeg4Box FindChildDeep(System.Type type)
{
foreach (Mpeg4Box child in Children)
{
if (child.GetType() == type)
{
return(child);
}
}
foreach (Mpeg4Box child in Children)
{
Mpeg4Box success = child.FindChildDeep(type);
if (success != null)
{
return(success);
}
}
return(null);
}
// Recursively find the first child with a given box type giving
// preference to the current depth.
public Mpeg4Box FindChildDeep(ByteVector type)
{
foreach (Mpeg4Box child in Children)
{
if (child.BoxType == type)
{
return(child);
}
}
foreach (Mpeg4Box child in Children)
{
Mpeg4Box success = child.FindChildDeep(type);
if (success != null)
{
return(success);
}
}
return(null);
}
// This box can be created without loading it.
public Mpeg4AppleItemListBox(Mpeg4Box parent) : base("ilst", parent)
{
}
public Mpeg4IsoSampleEntry(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
File.Seek(base.DataPosition + 6);
dataReferenceIndex = (ushort)File.ReadBlock(2).ToShort();
}
public Mpeg4IsoMovieHeaderBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
// Size depends on version.
boxSize = Version == 1 ? 108 : 96;
// Get everything.
File.Seek(base.DataPosition);
ByteVector data = File.ReadBlock(boxSize);
int pos = 0;
// Read version one (large integers).
if (Version == 1)
{
if (data.Count >= pos + 8)
creationTime = (ulong)data.Mid(pos, 8).ToLong();
pos += 8;
if (data.Count >= pos + 8)
modificationTime = (ulong)data.Mid(pos, 8).ToLong();
pos += 8;
if (data.Count >= pos + 4)
timescale = data.Mid(pos, 4).ToUInt();
pos += 4;
if (data.Count >= pos + 8)
duration = (ulong)data.Mid(pos, 8).ToLong();
pos += 8;
}
// Read version zero (normal integers).
else
{
if (data.Count >= pos + 4)
creationTime = data.Mid(pos, 4).ToUInt();
pos += 4;
if (data.Count >= pos + 4)
modificationTime = data.Mid(pos, 4).ToUInt();
pos += 4;
if (data.Count >= pos + 4)
timescale = data.Mid(pos, 4).ToUInt();
pos += 4;
if (data.Count >= pos + 4)
duration = (ulong)data.Mid(pos, 4).ToUInt();
pos += 4;
}
// Get rate
if (data.Count >= pos + 4)
rate = data.Mid(pos, 4).ToUInt();
pos += 4;
// Get volume
if (data.Count >= pos + 2)
volume = (ushort)data.Mid(pos, 2).ToShort();
pos += 2;
// reserved
pos += 2;
// reserved
pos += 8;
// video transformation matrix
pos += 36;
// pre-defined
pos += 24;
// Get next track ID
if (data.Count >= pos + 4)
nextTrackId = (ushort)data.Mid(pos, 4).ToUInt();
}
public Mpeg4AppleAdditionalInfoBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
// The box content is a type string.
text = LoadBoxData().ToString(StringType.Latin1);
//BoxData.ToString(StringType.Latin1);
}
public Mpeg4UnknownBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
}
public Mpeg4IsoSampleEntry(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
File.Seek(base.DataPosition + 6);
dataReferenceIndex = (ushort)File.ReadBlock(2).ToShort();
}
protected Mpeg4FullBox(ByteVector type, uint flags, Mpeg4Box parent) : base(new Mpeg4BoxHeader(type), parent)
{
//version = 0;
this.flags = flags;
}
protected Mpeg4FullBox(ByteVector type, uint flags, Mpeg4Box parent) : base(new Mpeg4BoxHeader(type), parent)
{
//version = 0;
this.flags = flags;
}
public Mpeg4IsoUserDataBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
}
public Mpeg4IsoSampleTableBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
}
public Mpeg4AppleAnnotationBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
}
public Mpeg4IsoMetaBox(ByteVector handler_type, string handler_name, Mpeg4Box parent) : base("meta", 0, parent)
{
AddChild(new Mpeg4IsoHandlerBox(handler_type, handler_name, this));
}
public Mpeg4IsoFreeSpaceBox(ulong padding, Mpeg4Box parent) : base("free", parent)
{
PaddingSize = padding;
}
protected Mpeg4FullBox(ByteVector type, Mpeg4Box parent) : this(type, 0, parent)
{
}
public Mpeg4AppleItemListBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
}
// This box can be created without loading it.
public Mpeg4AppleItemListBox(Mpeg4Box parent) : base("ilst", parent)
{
}
// This box can be created without loading it.
public Mpeg4AppleAnnotationBox(ByteVector type, Mpeg4Box parent) : base(type, parent)
{
}
public Mpeg4IsoMediaBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
}
// This box can be created without loading it.
public Mpeg4IsoUserDataBox(Mpeg4Box parent) : base("udta", parent)
{
}
public Mpeg4AppleElementaryStreamDescriptor(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
//WARNING: this was changed from accessing the Data property directy to instead
// use LoadBoxData which returns a reference to the underlying data. This change
// was required to avoid accessing the virtual methods that the Data property uses
// Everything should still work but if it doesn't then this change is the culprit...
decoderConfiguration = new ByteVector();
uint length;
// This box contains a ton of information.
int offset = 0;
// This is a safe alternative to the Data property
// it will be a reference to the same underlying structure and so should work identically to Data
ByteVector boxData = LoadBoxData();
// Elementary Stream Descriptor Tag
if (boxData[offset++] == 3)
{
// We have a descriptor tag. Check that it'field at least 20 long.
if ((length = ReadLength(boxData, offset)) < 20)
{
TagLibDebugger.Debug("TagLib.Mpeg4.AppleElementaryStreamDescriptor () - Could not read data. Too small.");
return;
}
offset += 4;
streamId = boxData.Mid(offset, 2).ToShort();
offset += 2;
streamPriority = boxData[offset++];
}
else
{
// The tag wasn'type found, so the next two byte are the ID, and
// after that, business as usual.
streamId = boxData.Mid(offset, 2).ToShort();
offset += 2;
}
// Verify that the next data is the Decoder Configuration Descriptor
// Tag and escape if it won'type work out.
if (boxData[offset++] != 4)
{
TagLibDebugger.Debug("TagLib.Mpeg4.AppleElementaryStreamDescriptor () - Could not identify decoder configuration descriptor.");
return;
}
// Check that it'field at least 15 long.
if ((length = ReadLength(boxData, offset)) < 15)
{
TagLibDebugger.Debug("TagLib.Mpeg4.AppleElementaryStreamDescriptor () - Could not read data. Too small.");
return;
}
offset += 4;
// Read a lot of good info.
objectTypeId = boxData[offset++];
streamType = boxData[offset++];
bufferSize = boxData.Mid(offset, 3).ToUInt();
offset += 3;
maximumBitrate = boxData.Mid(offset, 4).ToUInt();
offset += 4;
averageBitrate = boxData.Mid(offset, 4).ToUInt();
offset += 4;
// Verify that the next data is the Decoder Specific Descriptor
// Tag and escape if it won'type work out.
if (boxData[offset++] != 5)
{
TagLibDebugger.Debug("TagLib.Mpeg4.AppleElementaryStreamDescriptor () - Could not identify decoder specific descriptor.");
return;
}
// The rest of the info is decoder specific.
length = ReadLength(boxData, offset);
offset += 4;
decoderConfiguration = boxData.Mid(offset, (int)length);
}
public Mpeg4IsoTrackBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
}
public Mpeg4IsoFreeSpaceBox(ulong padding, Mpeg4Box parent) : base("free", parent)
{
PaddingSize = padding;
}
public Mpeg4AppleItemListBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
}
public Mpeg4IsoFreeSpaceBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
// set padding equal to the size of the zero space.
padding = HeaderDataSize;
}
// If the file is readable and the box can have children and there is
// enough space to read the data, get the next box by reading from the end
// of the first box.
private Mpeg4Box NextChild(Mpeg4Box child)
{
if (HasChildren && this.File != null && child.NextBoxPosition >= DataPosition && child.NextBoxPosition < NextBoxPosition)
return Mpeg4Box.Create(File, child.NextBoxPosition, this);
return null;
}
public Mpeg4IsoFreeSpaceBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
// set padding equal to the size of the zero space.
padding = HeaderDataSize;
}
public Mpeg4IsoTrackBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
}
public Mpeg4IsoMediaInformationBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
}
protected Mpeg4FullBox(ByteVector type, Mpeg4Box parent) : this(type, 0, parent)
{
}
public Mpeg4AppleDataBox(ByteVector data, uint flags, Mpeg4Box parent) : base("data", flags, parent)
{
InitializeBoxData(data);
//Data = data;
}
// This box can be created without loading it.
public Mpeg4IsoUserDataBox(Mpeg4Box parent) : base("udta", parent)
{
}
public Mpeg4AppleAdditionalInfoBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
// The box content is a type string.
text = LoadBoxData().ToString(StringType.Latin1);
//BoxData.ToString(StringType.Latin1);
}
public Mpeg4IsoMetaBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
}
public Mpeg4IsoSampleTableBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
}
public Mpeg4AppleElementaryStreamDescriptor(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
//WARNING: this was changed from accessing the Data property directy to instead
// use LoadBoxData which returns a reference to the underlying data. This change
// was required to avoid accessing the virtual methods that the Data property uses
// Everything should still work but if it doesn't then this change is the culprit...
decoderConfiguration = new ByteVector();
uint length;
// This box contains a ton of information.
int offset = 0;
// This is a safe alternative to the Data property
// it will be a reference to the same underlying structure and so should work identically to Data
ByteVector boxData = LoadBoxData();
// Elementary Stream Descriptor Tag
if (boxData[offset++] == 3)
{
// We have a descriptor tag. Check that it'field at least 20 long.
if ((length = ReadLength(boxData, offset)) < 20)
{
TagLibDebugger.Debug("TagLib.Mpeg4.AppleElementaryStreamDescriptor () - Could not read data. Too small.");
return;
}
offset += 4;
streamId = boxData.Mid(offset, 2).ToShort();
offset += 2;
streamPriority = boxData[offset++];
}
else
{
// The tag wasn'type found, so the next two byte are the ID, and
// after that, business as usual.
streamId = boxData.Mid(offset, 2).ToShort();
offset += 2;
}
// Verify that the next data is the Decoder Configuration Descriptor
// Tag and escape if it won'type work out.
if (boxData[offset++] != 4)
{
TagLibDebugger.Debug("TagLib.Mpeg4.AppleElementaryStreamDescriptor () - Could not identify decoder configuration descriptor.");
return;
}
// Check that it'field at least 15 long.
if ((length = ReadLength(boxData, offset)) < 15)
{
TagLibDebugger.Debug("TagLib.Mpeg4.AppleElementaryStreamDescriptor () - Could not read data. Too small.");
return;
}
offset += 4;
// Read a lot of good info.
objectTypeId = boxData[offset++];
streamType = boxData[offset++];
bufferSize = boxData.Mid(offset, 3).ToUInt();
offset += 3;
maximumBitrate = boxData.Mid(offset, 4).ToUInt();
offset += 4;
averageBitrate = boxData.Mid(offset, 4).ToUInt();
offset += 4;
// Verify that the next data is the Decoder Specific Descriptor
// Tag and escape if it won'type work out.
if (boxData[offset++] != 5)
{
TagLibDebugger.Debug("TagLib.Mpeg4.AppleElementaryStreamDescriptor () - Could not identify decoder specific descriptor.");
return;
}
// The rest of the info is decoder specific.
length = ReadLength(boxData, offset);
offset += 4;
decoderConfiguration = boxData.Mid(offset, (int)length);
}
// Create a box by reading the file and add it to "parent".
public static Mpeg4Box Create(Mpeg4File file, long position, Mpeg4Box parent)
{
// Read the box header.
Mpeg4BoxHeader header = new Mpeg4BoxHeader(file, position);
// If we're not even valid, quit.
if (!header.IsValid)
return null;
// IF we're in a SampleDescriptionBox and haven'type loaded all the
// entries, try loading an appropriate entry.
if (parent.BoxType == "stsd" && parent.Children.Count < ((Mpeg4IsoSampleDescriptionBox)parent).EntryCount)
{
Mpeg4IsoHandlerBox handler = parent.Handler;
if (handler != null && handler.HandlerType == "soun")
return new Mpeg4IsoAudioSampleEntry(header, parent);
else
return new Mpeg4IsoSampleEntry(header, parent);
}
//
// A bunch of standard items.
//
if (header.BoxType == "moov")
return new Mpeg4IsoMovieBox(header, parent);
if (header.BoxType == "mvhd")
return new Mpeg4IsoMovieHeaderBox(header, parent);
if (header.BoxType == "mdia")
return new Mpeg4IsoMediaBox(header, parent);
if (header.BoxType == "minf")
return new Mpeg4IsoMediaInformationBox(header, parent);
if (header.BoxType == "stbl")
return new Mpeg4IsoSampleTableBox(header, parent);
if (header.BoxType == "stsd")
return new Mpeg4IsoSampleDescriptionBox(header, parent);
if (header.BoxType == "stco")
return new Mpeg4IsoChunkOffsetBox(header, parent);
if (header.BoxType == "co64")
return new Mpeg4IsoChunkLargeOffsetBox(header, parent);
if (header.BoxType == "trak")
return new Mpeg4IsoTrackBox(header, parent);
if (header.BoxType == "hdlr")
return new Mpeg4IsoHandlerBox(header, parent);
if (header.BoxType == "udta")
return new Mpeg4IsoUserDataBox(header, parent);
if (header.BoxType == "meta")
return new Mpeg4IsoMetaBox(header, parent);
if (header.BoxType == "ilst")
return new Mpeg4AppleItemListBox(header, parent);
if (header.BoxType == "data")
return new Mpeg4AppleDataBox(header, parent);
if (header.BoxType == "esds")
return new Mpeg4AppleElementaryStreamDescriptor(header, parent);
if (header.BoxType == "free" || header.BoxType == "skip")
return new Mpeg4IsoFreeSpaceBox(header, parent);
if (header.BoxType == "mean" || header.BoxType == "name")
return new Mpeg4AppleAdditionalInfoBox(header, parent);
// If we still don'type have a tag, and we're inside an ItemLisBox, load
// lthe box as an AnnotationBox (Apple tag item).
if (parent.GetType() == typeof(Mpeg4AppleItemListBox))
return new Mpeg4AppleAnnotationBox(header, parent);
// Nothing good. Go generic.
return new Mpeg4UnknownBox(header, parent);
}