public TrackFragmentBox(byte[] boxBytes, int start, int end) : base(ID.traf)
{
while (start < end)
{
Box box = Mp4Utils.GetBox(boxBytes, ref start, end);
if (box != null)
{
ID iD = box.ID;
if (iD == ID.tfhd)
{
this.tfhd = (box as TrackFragmentHeaderBox);
}
else if (iD == ID.sdtp)
{
this.sdtp = (box as SampleDependencyTypeBox);
}
else if (iD == ID.trun)
{
this.trun = (box as TrackRunBox);
}
else if (iD == ID.tfrf)
{
this.tfrf = (box as TfrfBox);
}
else if (iD == ID.tfxd)
{
this.tfxd = (box as TfxdBox);
}
}
}
}
public TrackFragmentHeaderBox(byte[] boxBytes, int start, int end) : base(ID.tfhd)
{
// TODO: Don't store field this.tr_flags etc. if not used.
this.tf_flags = BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(boxBytes, 4, ref start, end), 0);
this.base_data_offset_present = ((1u & this.tf_flags) != 0u);
this.sample_description_index_present = ((2u & this.tf_flags) != 0u);
this.default_sample_duration_present = ((8u & this.tf_flags) != 0u);
this.default_sample_size_present = ((16u & this.tf_flags) != 0u);
this.default_sample_flags_present = ((32u & this.tf_flags) != 0u);
this.duration_is_empty = ((65536u & this.tf_flags) != 0u);
this.track_ID = BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(boxBytes, 4, ref start, end), 0);
if (this.base_data_offset_present)
{
this.base_data_offset = BitConverter.ToUInt64(Mp4Utils.ReadReverseBytes(boxBytes, 8, ref start, end), 0);
}
if (this.sample_description_index_present)
{
this.sample_description_index = BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(
boxBytes, 4, ref start, end), 0);
}
if (this.default_sample_duration_present)
{
this.default_sample_duration = BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(
boxBytes, 4, ref start, end), 0);
}
if (this.default_sample_size_present)
{
this.default_sample_size = BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(boxBytes, 4, ref start, end), 0);
}
if (this.default_sample_flags_present)
{
this.default_sample_flags = BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(boxBytes, 4, ref start, end), 0);
}
}
public MovieFragmentHeaderBox(byte[] boxBytes, int start, int end) : base(ID.mfhd)
{
if (end - start != 8)
{
throw new Exception("Invalid '" + base.ID + "' length!");
}
start += 4;
this.SequenceNumber = BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(boxBytes, 4, ref start, end), 0);
}
public TfrfBox(byte[] boxBytes, int start, int end) : base(ID.tfrf)
{
this.Version = Mp4Utils.ReadReverseBytes(boxBytes, 1, ref start, end)[0];
this.Flags = Mp4Utils.ReadReverseBytes(boxBytes, 3, ref start, end);
int fragmentCount = (int)Mp4Utils.ReadReverseBytes(boxBytes, 1, ref start, end)[0];
this.Array = new TfrfBox.Element[fragmentCount];
for (int i = 0; i < fragmentCount; i++)
{
this.Array[i] = new TfrfBox.Element(boxBytes, this.Version, ref start, end);
}
// TODO: Do we want to test start == end (in other classes as well?).
}
public Element(byte[] boxBytes, byte version, ref int start, int end)
{
if (version == 0)
{
this.FragmentAbsoluteTime = (ulong)BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(boxBytes, 4, ref start, end), 0);
this.FragmentDuration = (ulong)BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(boxBytes, 4, ref start, end), 0);
}
else
{
if (version != 1)
{
throw new Exception("Invalid TfrfBox version '" + version + "'!");
}
this.FragmentAbsoluteTime = BitConverter.ToUInt64(Mp4Utils.ReadReverseBytes(boxBytes, 8, ref start, end), 0);
this.FragmentDuration = BitConverter.ToUInt64(Mp4Utils.ReadReverseBytes(boxBytes, 8, ref start, end), 0);
}
}
public TrackRunBox(byte[] boxBytes, int start, int end) : base(ID.trun)
{
// TODO: Don't store field this.tr_flags etc. if not used.
this.tr_flags = BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(boxBytes, 4, ref start, end), 0);
this.data_offset_present = ((1u & this.tr_flags) != 0u);
this.first_sample_flags_present = ((4u & this.tr_flags) != 0u);
this.sample_duration_present = ((256u & this.tr_flags) != 0u);
this.sample_size_present = ((512u & this.tr_flags) != 0u);
this.sample_flags_present = ((1024u & this.tr_flags) != 0u);
this.sample_composition_time_offsets_present = ((2048u & this.tr_flags) != 0u);
this.sample_count = BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(boxBytes, 4, ref start, end), 0);
if (this.data_offset_present)
{
this.data_offset = BitConverter.ToInt32(Mp4Utils.ReadReverseBytes(boxBytes, 4, ref start, end), 0);
}
if (this.first_sample_flags_present)
{
this.first_sample_flags = BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(boxBytes, 4, ref start, end), 0);
}
this.array = new TrackRunBox.Element[this.sample_count];
for (int i = 0; i < this.array.Length; i++)
{
uint sample_duration = 0u;
uint sample_size = 0u;
uint sample_flags = 0u;
uint sample_composition_time_offset = 0u;
if (this.sample_duration_present)
{
sample_duration = BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(boxBytes, 4, ref start, end), 0);
}
if (this.sample_size_present)
{
sample_size = BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(boxBytes, 4, ref start, end), 0);
}
if (this.sample_flags_present)
{
sample_flags = BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(boxBytes, 4, ref start, end), 0);
}
if (this.sample_composition_time_offsets_present)
{
sample_composition_time_offset = BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(boxBytes, 4, ref start, end), 0);
}
this.array[i] = new TrackRunBox.Element(sample_duration, sample_size, sample_flags, sample_composition_time_offset);
}
}
public MovieFragmentBox(byte[] boxBytes, int start, int end) : base(ID.moof)
{
while (start < end)
{
Box box = Mp4Utils.GetBox(boxBytes, ref start, end);
if (box == null)
{
}
else if (box.ID == ID.traf)
{
this.traf = (box as TrackFragmentBox);
}
else if (box.ID == ID.mfhd)
{
this.mfhd = (box as MovieFragmentHeaderBox);
}
}
}
public Fragment(byte[] boxBytes, int start, int end)
{
while (start < end)
{
Box box = Mp4Utils.GetBox(boxBytes, ref start, end);
if (box == null)
{
}
else if (box.ID == ID.mdat)
{
this.mdat = (box as MediaDataBox);
}
else if (box.ID == ID.moof)
{
this.moof = (box as MovieFragmentBox);
}
}
}
public SampleDependencyTypeBox(byte[] boxBytes, int start, int end) : base(ID.sdtp)
{
this.version = BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(boxBytes, 4, ref start, end), 0);
int count = end - start;
this.array = new SampleDependencyTypeBox.Element[count];
for (int i = 0; i < count; i++)
{
byte b = Mp4Utils.ReadReverseBytes(boxBytes, 1, ref start, end)[0];
byte reserved = (byte)(b >> 6);
b <<= 2;
byte sample_depends_on = (byte)(b >> 6);
b <<= 2;
byte sample_is_depended_on = (byte)(b >> 6);
b <<= 2;
byte sample_has_redundancy = (byte)(b >> 6);
this.array[i] = new SampleDependencyTypeBox.Element(
reserved, sample_depends_on, sample_is_depended_on, sample_has_redundancy);
}
}
public TfxdBox(byte[] boxBytes, int start, int end) : base(ID.tfxd)
{
// TODO: Don't read and populate unused fields.
this.Version = Mp4Utils.ReadReverseBytes(boxBytes, 1, ref start, end)[0];
this.Flags = Mp4Utils.ReadReverseBytes(boxBytes, 3, ref start, end);
if (this.Version == 0)
{
this.FragmentAbsoluteTime = (ulong)BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(
boxBytes, 4, ref start, end), 0);
this.FragmentDuration = (ulong)BitConverter.ToUInt32(Mp4Utils.ReadReverseBytes(boxBytes, 4, ref start, end), 0);
}
else
{
if (this.Version != 1)
{
throw new Exception("Invalid TfxdBox version '" + this.Version + "'!");
}
this.FragmentAbsoluteTime = BitConverter.ToUInt64(Mp4Utils.ReadReverseBytes(boxBytes, 8, ref start, end), 0);
this.FragmentDuration = BitConverter.ToUInt64(Mp4Utils.ReadReverseBytes(boxBytes, 8, ref start, end), 0);
}
}
