public VideoTrack(IBox trak, MP4InputStream inStream)
: base(trak, inStream)
{
throw new NotImplementedException();
// Box minf = trak.getChild(BoxType.MEDIA_BOX).getChild(BoxType.MEDIA_INFORMATION_BOX);
// vmhd = (VideoMediaHeaderBox) minf.getChild(BoxType.VIDEO_MEDIA_HEADER_BOX);
// Box stbl = minf.getChild(BoxType.SAMPLE_TABLE_BOX);
// //sample descriptions: 'mp4v' has an ESDBox, all others have a CodecSpecificBox
// SampleDescriptionBox stsd = (SampleDescriptionBox) stbl.getChild(BoxType.SAMPLE_DESCRIPTION_BOX);
// if(stsd.getChildren().get(0) instanceof VideoSampleEntry) {
// sampleEntry = (VideoSampleEntry) stsd.getChildren().get(0);
// long type = sampleEntry.getType();
// if(type==BoxType.MP4V_SAMPLE_ENTRY) findDecoderSpecificInfo((ESDBox) sampleEntry.getChild(BoxType.ESD_BOX));
// else if(type==BoxType.ENCRYPTED_VIDEO_SAMPLE_ENTRY||type==BoxType.DRMS_SAMPLE_ENTRY) {
// findDecoderSpecificInfo((ESDBox) sampleEntry.getChild(BoxType.ESD_BOX));
// protection = Protection.parse(sampleEntry.getChild(BoxType.PROTECTION_SCHEME_INFORMATION_BOX));
// }
// else decoderInfo = DecoderInfo.parse((CodecSpecificBox) sampleEntry.getChildren().get(0));
// codec = VideoCodec.forType(sampleEntry.getType());
// }
// else {
// sampleEntry = null;
// codec = VideoCodec.UNKNOWN_VIDEO_CODEC;
// }
}
// --- children ---
protected void readChildren(MP4InputStream inStream)
{
while ((size - (inStream.getOffset() - start)) > 0)
{
Descriptor desc = createDescriptor(inStream);
children.Add(desc);
}
}
public void readChildren(MP4InputStream inStream)
{
while (inStream.getOffset() < (offset + size))
{
var box = BoxFactory.parseBox(this, inStream);
children.Add(box);
}
}
public void readChildren(MP4InputStream inStream, int len)
{
for (int i = 0; i < len; i++)
{
var box = BoxFactory.parseBox(this, inStream);
children.Add(box);
}
}
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);
referenceType = inStream.readString(4);
while (getLeft(inStream) > 3)
{
trackIDs.Add((int)inStream.readBytes(4));
}
}
public override void decode(MP4InputStream inStream)
{
base.decode(inStream);
dataType = forInt(flags);
inStream.skipBytes(4); // padding?
data = new byte[(int)getLeft(inStream)];
inStream.read(data, 0, data.Length);
}
public override void decode(MP4InputStream inStream)
{
base.decode(inStream);
try
{
string tmp = inStream.readString((int)getLeft(inStream));
}
catch
{
inStream.skipBytes(getLeft(inStream));
}
}
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)
{
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);
languageCode = BoxUtils.getLanguageCode(inStream.readBytes(2));
var b = inStream.readTerminated((int)getLeft(inStream), 0);
genre = Encoding.UTF8.GetString(b);
}
else
{
readChildren(inStream);
}
}
public AudioTrack(IBox trak, MP4InputStream inStream)
: base(trak, inStream)
{
var mdia = trak.getChild(BoxType.MEDIA_BOX);
var minf = mdia.getChild(BoxType.MEDIA_INFORMATION_BOX);
smhd = (SoundMediaHeaderBox)minf.getChild(BoxType.SOUND_MEDIA_HEADER_BOX);
var stbl = minf.getChild(BoxType.SAMPLE_TABLE_BOX);
// sample descriptions: 'mp4a' and 'enca' have an ESDBox, all others have a CodecSpecificBox
var stsd = (SampleDescriptionBox)stbl.getChild(BoxType.SAMPLE_DESCRIPTION_BOX);
sampleEntry = stsd.getChildren()[0] as AudioSampleEntry;
if (sampleEntry != null)
{
var type = sampleEntry.getType();
if (sampleEntry.hasChild(BoxType.ESD_BOX))
{
findDecoderSpecificInfo((ESDBox)sampleEntry.getChild(BoxType.ESD_BOX));
}
else
{
throw new NotImplementedException();
// decoderInfo = DecoderInfo.parse((CodecSpecificBox)sampleEntry.getChildren()[0]);
}
if (type == BoxType.ENCRYPTED_AUDIO_SAMPLE_ENTRY || type == BoxType.DRMS_SAMPLE_ENTRY)
{
findDecoderSpecificInfo((ESDBox)sampleEntry.getChild(BoxType.ESD_BOX));
protection = Protection.parse(sampleEntry.getChild(BoxType.PROTECTION_SCHEME_INFORMATION_BOX));
codec = protection.getOriginalFormat();
}
else
{
codec = AudioCodec.forType(sampleEntry.getType());
}
}
else
{
codec = new AudioCodec(AudioCodec.CodecType.UNKNOWN_AUDIO_CODEC);
}
}
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 Movie(IBox moov, MP4InputStream inStream)
{
this.inStream = inStream;
// --- create tracks ---
mvhd = (MovieHeaderBox)moov.getChild(BoxType.MOVIE_HEADER_BOX);
foreach (var trackBox in moov.getChildren(BoxType.TRACK_BOX))
{
var track = createTrack(trackBox);
if (track != null)
{
tracks.Add(track);
}
}
// --- read metadata: moov.meta/moov.udta.meta ---
metaData = new MetaData();
if (moov.hasChild(BoxType.META_BOX))
{
metaData.parse(null, moov.getChild(BoxType.META_BOX));
}
else if (moov.hasChild(BoxType.USER_DATA_BOX))
{
var udta = moov.getChild(BoxType.USER_DATA_BOX);
if (udta.hasChild(BoxType.META_BOX))
{
metaData.parse(udta, udta.getChild(BoxType.META_BOX));
}
}
// --- detect DRM ---
protections = new List <Protection>();
if (moov.hasChild(BoxType.ITEM_PROTECTION_BOX))
{
var ipro = moov.getChild(BoxType.ITEM_PROTECTION_BOX);
foreach (var sinf in ipro.getChildren(BoxType.PROTECTION_SCHEME_INFORMATION_BOX))
{
protections.Add(Protection.parse(sinf));
}
}
}
protected Track(IBox trak, MP4InputStream inStream)
{
this.inStream = inStream;
tkhd = (TrackHeaderBox)trak.getChild(BoxType.TRACK_HEADER_BOX);
var mdia = trak.getChild(BoxType.MEDIA_BOX);
mdhd = (MediaHeaderBox)mdia.getChild(BoxType.MEDIA_HEADER_BOX);
var minf = mdia.getChild(BoxType.MEDIA_INFORMATION_BOX);
var dinf = minf.getChild(BoxType.DATA_INFORMATION_BOX);
var dref = (DataReferenceBox)dinf.getChild(BoxType.DATA_REFERENCE_BOX);
// --- sample table ---
var stbl = minf.getChild(BoxType.SAMPLE_TABLE_BOX);
if (stbl.hasChildren())
{
parseSampleTable(stbl);
}
}
public static Descriptor createDescriptor(MP4InputStream inStream)
{
//read tag and size
int type = inStream.read();
int read = 1;
int size = 0;
int b = 0;
do
{
b = inStream.read();
size <<= 7;
size |= b & 0x7f;
read++;
}while ((b & 0x80) == 0x80);
//create descriptor
Descriptor desc = forTag(type);
desc.type = type;
desc.size = size;
desc.start = inStream.getOffset();
//decode
desc.decode(inStream);
//skip remaining bytes
long remaining = size - (inStream.getOffset() - desc.start);
if (remaining > 0)
{
Logger.LogBoxes(string.Format("Descriptor: bytes left: {0:N0}, offset: {1:N0}", remaining, inStream.getOffset()));
inStream.skipBytes(remaining);
}
desc.size += read; //include type and size fields
return(desc);
}
/// <summary>
/// Decodes the given input stream by reading this box and all of its children (if any).
/// </summary>
/// <param name="inStream">an input stream</param>
public virtual void decode(MP4InputStream inStream)
{
}
protected long getLeft(MP4InputStream inStream)
{
return((offset + size) - inStream.getOffset());
}
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);
}
public abstract void decode(MP4InputStream inStream);
public MP4Container(Stream inStream)
{
this.inStream = new MP4InputStream(inStream);
readContent();
}
