public List <int> GetListTrackToDecrypt()
{
List <int> result = new List <int>();
if (Children != null)
{
foreach (var box in Children)
{
if (box.GetBoxType() == "trak")
{
Mp4Box encbox = box.FindChildBox("encv");
if (encbox == null)
{
encbox = box.FindChildBox("enca");
if (encbox == null)
{
encbox = box.FindChildBox("enct");
}
}
if (encbox != null)
{
Mp4BoxTRAK trakbox = box as Mp4BoxTRAK;
if (trakbox != null)
{
result.Add(trakbox.GetTrackID());
}
}
}
}
}
return(result);
}
public static Mp4Box CreateMp4Box(byte[] buffer, int offset)
{
if ((buffer != null) &&
(offset + 8 < buffer.Length))
{
Mp4Box box = new Mp4Box();
if (box != null)
{
box.Length = ReadMp4BoxLength(buffer, offset);
if ((offset + box.Length <= buffer.Length) && (box.Length > 8))
{
box.Type = ReadMp4BoxType(buffer, offset);
box.Data = ReadMp4BoxData(buffer, offset, box.Length);
List <Mp4Box> list = box.GetChildren();
if ((list != null) && (list.Count > 0))
{
foreach (var b in list)
{
box.AddMp4Box(box);
}
}
return(box);
}
}
}
return(null);
}
private static Mp4Box ReadMp4Box(FileStream fs)
{
Mp4Box box = null;
if (fs != null)
{
byte[] buffer = new byte[4];
if (buffer != null)
{
if (fs.Read(buffer, 0, 4) == 4)
{
int mp4BoxLen = 0;
mp4BoxLen |= (int)(buffer[0] << 24);
mp4BoxLen |= (int)(buffer[1] << 16);
mp4BoxLen |= (int)(buffer[2] << 8);
mp4BoxLen |= (int)(buffer[3] << 0);
if (mp4BoxLen >= 8)
{
buffer = new byte[mp4BoxLen];
if (buffer != null)
{
WriteMp4BoxInt32(buffer, 0, mp4BoxLen);
if (fs.Read(buffer, 4, mp4BoxLen - 4) == (mp4BoxLen - 4))
{
return(CreateMp4Box(buffer, 0));
}
}
}
}
}
}
return(box);
}
public byte[] GetFTYPData()
{
ISMHelper.Mp4Box box = ISMHelper.Mp4Box.CreateFTYPBox();
if (box != null)
{
return(box.GetBoxBytes());
}
return(null);
}
public override byte[] GetMOOVData()
{
ISMHelper.Mp4Box box = ISMHelper.Mp4Box.CreateTextMOOVBox((Int16)TrackID, TimeScale, Duration, Language, ProtectionGuid, ProtectionData);
if (box != null)
{
return(box.GetBoxBytes());
}
return(null);
}
public override byte[] GetMOOVData()
{
ISMHelper.Mp4Box box = ISMHelper.Mp4Box.CreateAudioMOOVBox((Int16)TrackID, MaxFramesize, Bitrate, BitsPerSample, SamplingRate, Channels, TimeScale, Duration, Language, CodecPrivateData, ProtectionGuid, ProtectionData);
if (box != null)
{
return(box.GetBoxBytes());
}
return(null);
}
public override byte[] GetMOOVData()
{
ISMHelper.Mp4Box box = ISMHelper.Mp4Box.CreateVideoMOOVBox((Int16)TrackID, (Int16)Width, (Int16)Height, TimeScale, Duration, Language, CodecPrivateData, ProtectionGuid, ProtectionData);
if (box != null)
{
return(box.GetBoxBytes());
}
return(null);
}
public virtual byte[] GetMFRAData(ulong OffsetWithVideo)
{
ISMHelper.Mp4Box box = ISMHelper.Mp4Box.CreateMFRABox((Int16)TrackID, ListTimeOffset, OffsetWithVideo);
if (box != null)
{
return(box.GetBoxBytes());
}
return(null);
}
public bool UpdateEncBoxes()
{
bool result = false;
if (Children != null)
{
foreach (var box in Children)
{
if (box.GetBoxType() == "trak")
{
Mp4Box encbox = box.FindChildBox("encv");
if (encbox != null)
{
encbox.SetBoxType("avc1");
Mp4Box sinfbox = box.FindChildBox("sinf");
if (sinfbox != null)
{
int Len = sinfbox.GetBoxLength();
UpdateParentLength(sinfbox, -Len);
encbox.RemoveChildBox("sinf");
}
}
else
{
encbox = box.FindChildBox("enca");
if (encbox != null)
{
encbox.SetBoxType("mp4a");
Mp4Box sinfbox = box.FindChildBox("sinf");
if (sinfbox != null)
{
int Len = sinfbox.GetBoxLength();
UpdateParentLength(sinfbox, -Len);
encbox.RemoveChildBox("sinf");
}
}
else
{
encbox = box.FindChildBox("enct");
if (encbox != null)
{
encbox.SetBoxType("dfxp");
Mp4Box sinfbox = box.FindChildBox("sinf");
if (sinfbox != null)
{
int Len = sinfbox.GetBoxLength();
UpdateParentLength(sinfbox, -Len);
encbox.RemoveChildBox("sinf");
}
}
}
}
}
}
}
return(result);
}
public int GetTrackID()
{
Mp4Box box = FindChildBox("tkhd");
if (box != null)
{
Mp4BoxTKHD tkhdbox = box as Mp4BoxTKHD;
if (tkhdbox != null)
{
return(tkhdbox.GetTrackID());
}
}
return(0);
}
public bool UpdateMFHDSequence(int SequenceNumber)
{
bool result = false;
Mp4Box box = FindChildBox("mfhd");
if (box != null)
{
Mp4BoxMFHD mfhdbox = box as Mp4BoxMFHD;
if (mfhdbox != null)
{
return(mfhdbox.UpdateSequenceNumber(SequenceNumber));
}
}
return(result);
}
public int GetTrackID()
{
int result = 0;
Mp4Box box = FindChildBox("tfhd");
if (box != null)
{
Mp4BoxTFHD tfhdbox = box as Mp4BoxTFHD;
if (tfhdbox != null)
{
return(tfhdbox.GetTrackID());
}
}
return(result);
}
public static Mp4Box CreateEmptyMp4Box(string Type)
{
Mp4Box box = new Mp4Box();
if (box != null)
{
box.Length = 8;
if (!string.IsNullOrEmpty(Type) &&
(Type.Length <= 4))
{
box.Type = Type;
return(box);
}
}
return(null);
}
public bool AddMp4Box(Mp4Box box, bool bAddInData = false)
{
if (Children == null)
{
Children = new List <Mp4Box>();
}
if (Children != null)
{
Children.Add(box);
if (bAddInData == true)
{
Append(box.Data);
}
return(true);
}
return(false);
}
public static string ParseFile(string Path)
{
string result = "\r\n";
try
{
FileStream fs = new FileStream(Path, FileMode.Open, FileAccess.Read);
if (fs != null)
{
long offset = 0;
fs.Seek((long)offset, SeekOrigin.Begin);
while (offset < fs.Length)
{
Mp4Box box = ReadMp4Box(fs);
if (box != null)
{
result += box.ToString() + "\tat offset: " + offset.ToString() + "\r\n";
if (box.Type != "mdat\0")
{
result += GetBoxChildrenString(0, box);
}
offset += box.Length;
}
else
{
break;
}
}
fs.Close();
}
}
catch (Exception ex)
{
result += "ERROR: Exception while parsing the file: " + ex.Message;
}
return(result);
}
public List <Mp4Box> GetChildren()
{
List <Mp4Box> list = new List <Mp4Box>();
if ((list != null) && (Data != null))
{
int offset = 0;
while (offset < Data.Length)
{
Mp4Box box = CreateMp4Box(Data, offset);
if (box != null)
{
list.Add(box);
offset += box.Length;
}
else
{
break;
}
}
}
return(list);
}
public static string GetBoxChildrenString(int level, Mp4Box box)
{
string result = string.Empty;
int locallevel = level + 1;
if (box != null)
{
List <Mp4Box> list = box.GetChildren();
if ((list != null) && (list.Count > 0))
{
foreach (var m in list)
{
string prefix = string.Empty;
for (int i = 0; i < locallevel; i++)
{
prefix += "\t\t";
}
result += prefix + m.ToString() + "\r\n";
result += GetBoxChildrenString(locallevel, m);
}
}
}
return(result);
}
static private byte[] GetESDescriptor(int mMaxFrameSize, int mBitrate, int mSampleRate, int mChannels, string CodecPrivateData)
{
int BufferCodecPrivateDataLen = 0;
byte[] BufferCodecPrivateData = null;
byte[] ESDescriptorBuffer = null;
try
{
BufferCodecPrivateData = Mp4Box.HexStringToByteArray(CodecPrivateData);
if (BufferCodecPrivateData != null)
{
BufferCodecPrivateDataLen = BufferCodecPrivateData.Length;
}
int Len = 1 + 3 + 1 + 2 + 1 + 1 + 3 + 1 + 1 /*Type*/ + 1 + 3 + 4 + 4 + 1 + 3 + 1 + BufferCodecPrivateDataLen + 3;
ESDescriptorBuffer = new byte[Len];
int offset = 0;
ESDescriptorBuffer[offset++] = 0x03;
ESDescriptorBuffer[offset++] = 0x80;
ESDescriptorBuffer[offset++] = 0x80;
ESDescriptorBuffer[offset++] = 0x80;
ESDescriptorBuffer[offset++] = (byte)(Len - offset - 1);
Mp4Box.WriteMp4BoxInt16(ESDescriptorBuffer, offset, 0);
offset += 2;
ESDescriptorBuffer[offset++] = 0x00;
ESDescriptorBuffer[offset++] = 0x04;
ESDescriptorBuffer[offset++] = 0x80;
ESDescriptorBuffer[offset++] = 0x80;
ESDescriptorBuffer[offset++] = 0x80;
// Update Length for tag 0x04
ESDescriptorBuffer[offset++] = (byte)(Len - offset - 1 - 2);
// ESDescriptorBuffer[offset++] = (byte)(Len - offset - 1 - 4);
// MPEG 4 Audio
ESDescriptorBuffer[offset++] = 0x40;
ESDescriptorBuffer[offset++] = 0x15;
int bufferSize = 0x300;
while (bufferSize < 2 * mMaxFrameSize)
{
bufferSize += 0x100;
}
Mp4Box.WriteMp4BoxInt24(ESDescriptorBuffer, offset, bufferSize);
offset += 3;
Mp4Box.WriteMp4BoxInt32(ESDescriptorBuffer, offset, mBitrate);
offset += 4;
Mp4Box.WriteMp4BoxInt32(ESDescriptorBuffer, offset, mBitrate);
offset += 4;
ESDescriptorBuffer[offset++] = 0x05;
ESDescriptorBuffer[offset++] = 0x80;
ESDescriptorBuffer[offset++] = 0x80;
ESDescriptorBuffer[offset++] = 0x80;
ESDescriptorBuffer[offset++] = (byte)BufferCodecPrivateDataLen;
if (BufferCodecPrivateData != null)
{
Mp4Box.WriteMp4BoxData(ESDescriptorBuffer, offset, BufferCodecPrivateData);
}
offset += BufferCodecPrivateDataLen;
ESDescriptorBuffer[offset++] = 0x06;
ESDescriptorBuffer[offset++] = 0x01;
ESDescriptorBuffer[offset++] = 0x02;
}
catch (Exception)
{
}
return(ESDescriptorBuffer);
}
