public override void decode(MP4InputStream inStream)
{
base.decode(inStream);
while (getLeft(inStream) > 0)
{
int rate = (int)inStream.readBytes(4);
int initialDelay = (int)inStream.readBytes(4);
pairs.Add(new KeyValuePair <int, int>(rate, initialDelay));
}
}
public override void decode(MP4InputStream inStream)
{
base.decode(inStream);
inStream.skipBytes(4); //pre-defined: 0
handlerType = inStream.readBytes(4);
inStream.readBytes(4); //reserved
inStream.readBytes(4); //reserved
inStream.readBytes(4); //reserved
handlerName = inStream.readEncodedString((int)getLeft(inStream), Encoding.UTF8);
}
public override void decode(MP4InputStream inStream)
{
// 3gpp or iTunes
if (parent.getType() == BoxType.USER_DATA_BOX)
{
base.decode(inStream);
// TODO: what to do with both?
long entity = inStream.readBytes(4);
long criteria = inStream.readBytes(4);
languageCode = BoxUtils.getLanguageCode(inStream.readBytes(2));
var b = inStream.readTerminated((int)getLeft(inStream), 0);
rating = Encoding.UTF8.GetString(b);
}
else
{
readChildren(inStream);
}
}
public override void decode(MP4InputStream inStream)
{
base.decode(inStream);
referenceType = inStream.readString(4);
while (getLeft(inStream) > 3)
{
trackIDs.Add((int)inStream.readBytes(4));
}
}
public override void decode(MP4InputStream inStream)
{
base.decode(inStream);
graphicsMode = inStream.readBytes(2);
// 6 byte RGB color
var c = new int[3];
for (int i = 0; i < 3; i++)
{
c[i] = (inStream.read() & 0xFF) | ((inStream.read() << 8) & 0xFF);
}
color = Color.FromArgb(c[0], c[1], c[2]);
}
public override void decode(MP4InputStream inStream)
{
// 3gpp or iTunes
if (parent.getType() == BoxType.USER_DATA_BOX)
{
base.decode(inStream);
languageCode = BoxUtils.getLanguageCode(inStream.readBytes(2));
var b = inStream.readTerminated((int)getLeft(inStream), 0);
genre = Encoding.UTF8.GetString(b);
}
else
{
readChildren(inStream);
}
}
public static IBox parseBox(IBox parent, MP4InputStream inStream)
{
long offset = inStream.getOffset();
long size = inStream.readBytes(4);
var type = (BoxType)(uint)inStream.readBytes(4);
if (size == 1)
{
size = inStream.readBytes(8);
}
if (type == BoxType.EXTENDED_TYPE)
{
inStream.skipBytes(16);
}
if (type == 0)
{
return(new UnknownBox());
}
// --- error protection ---
if (parent != null)
{
long parentLeft = (parent.getOffset() + parent.getSize()) - offset;
if (size > parentLeft)
{
throw new Exception("error while decoding box '" + type + "' ('" + typeToString(type) + "') at offset " + offset.ToString("N0") + ": box too large for parent");
}
}
Logger.LogBoxes("[" + offset.ToString("N0") + "] " + GetBoxPath(type, parent));
var box = forType(type, inStream.getOffset());
box.setParams(parent, size, type, offset);
box.decode(inStream);
// --- if box doesn't contain data it only contains children ---
if (box.GetType() == typeof(BoxImpl) || box.GetType() == typeof(FullBox))
{
box.readChildren(inStream);
}
// --- check bytes left ---
long left = (box.getOffset() + box.getSize()) - inStream.getOffset();
if (left > 0)
{
if (!(box is MediaDataBox) && !(box is UnknownBox) && !(box is FreeSpaceBox))
{
Logger.LogInfo(string.Format("bytes left after reading box {0}: left: {1}, offset: {2}", typeToString(type), left, inStream.getOffset()));
}
// --- skip left Data ---
inStream.skipBytes(left);
}
else if (left < 0)
{
Logger.LogServe(string.Format("box {0} overread: {1} bytes, offset: {2}", typeToString(type), -left, inStream.getOffset()));
}
return(box);
}
