private static void Add(IList <ECMEMM> list, ECMEMM newEcm)
{
for (int i = 0; i < list.Count; ++i)
{
if (list[i].ProviderId == newEcm.ProviderId &&
list[i].Pid == newEcm.Pid &&
list[i].CaId == newEcm.CaId)
{
return;
}
}
list.Add(newEcm);
}
/// <summary>
/// Returns the ECM's found in the PMT.
/// </summary>
/// <returns></returns>
private static void Parse(byte[] descriptor, IList<ECMEMM> newEcms)
{
ECMEMM ecm = new ECMEMM();
int off = 0;
while (off < descriptor.Length)
{
byte tag = descriptor[off];
byte len = descriptor[off + 1];
if (tag == 0x9)
{
int offset;
if (ecm.Pid != 0)
Add(newEcms, ecm);
ecm = new ECMEMM();
int caId = ecm.CaId = ((descriptor[off + 2]) << 8) + descriptor[off + 3];
ecm.Pid = ((descriptor[off + 4] & 0x1f) << 8) + descriptor[off + 5];
if (ecm.CaId == 0x100 && len >= 17)
{
if (descriptor[off + 8] == 0xff)
{
//0 1 2 3 4 5 6 7 8 9 10
//9 11 1 0 E6 43 0 6A FF 0 0 0 0 0 0 2 14 21 8C
//
//
//0 1 2 3 4 5 6 7 8 9 10
//9 11 1 0 E6 1C 41 1 FF FF FF FF FF FF FF FF FF 21 8C
int count = (len - 2) / 15;
for (int i = 0; i < count; ++i)
{
offset = off + i * 15;
if (offset >= descriptor.Length)
break;
ecm = new ECMEMM();
ecm.CaId = caId;
ecm.Pid = ((descriptor[offset + 4] & 0x1f) << 8) + descriptor[offset + 5];
ecm.ProviderId = ((descriptor[offset + 6]) << 8) + descriptor[offset + 7];
Add(newEcms, ecm);
ecm = new ECMEMM();
}
}
}
if (ecm.CaId == 0x100 && len >= 8)
{
if (descriptor[off + 7] == 0xe0 && descriptor[8] != 0xff)
{
//0 1 2 3 4 5 6 7 8 9 10
//9 11 1 0 E0 C1 3 E0 92 41 1 E0 93 40 1 E0 C4 0 64
//9 D 1 0 E0 B6 2 E0 B7 0 6A E0 B9 0 6C
if (descriptor[off + 6] > 0 || descriptor[off + 6] <= 9)
{
ecm.ProviderId = ((descriptor[off + 9]) << 8) + descriptor[off + 10];
}
}
}
offset = off + 6;
while (offset + 2 < descriptor.Length)
{
byte tagInd = descriptor[offset];
byte tagLen = descriptor[offset + 1];
if (tagLen + offset < descriptor.Length)
{
if (tagInd == 0x14)
{
ecm.ProviderId = (descriptor[offset + 2] << 16) + (descriptor[offset + 3] << 8) +
descriptor[offset + 4];
// Some providers sends wrong information in provider id (Boxer),
// so reset lower 4 bits for Via Access
if (ecm.CaId == 0x500)
{
ecm.ProviderId = ecm.ProviderId & 0xFFFFF0;
}
}
}
offset += (tagLen + 2);
}
}
off += (len + 2);
}
if (ecm.Pid > 0)
Add(newEcms, ecm);
}
private static void Add(IList<ECMEMM> list, ECMEMM newEcm)
{
for (int i = 0; i < list.Count; ++i)
{
if (list[i].ProviderId == newEcm.ProviderId &&
list[i].Pid == newEcm.Pid &&
list[i].CaId == newEcm.CaId)
return;
}
list.Add(newEcm);
}
/// <summary>
/// Returns the ECM's found in the PMT.
/// </summary>
/// <returns></returns>
private static void Parse(byte[] descriptor, IList <ECMEMM> newEcms)
{
ECMEMM ecm = new ECMEMM();
int off = 0;
while (off < descriptor.Length)
{
byte tag = descriptor[off];
byte len = descriptor[off + 1];
if (tag == 0x9)
{
int offset;
if (ecm.Pid != 0)
{
Add(newEcms, ecm);
}
ecm = new ECMEMM();
int caId = ecm.CaId = ((descriptor[off + 2]) << 8) + descriptor[off + 3];
ecm.Pid = ((descriptor[off + 4] & 0x1f) << 8) + descriptor[off + 5];
if (ecm.CaId == 0x100 && len >= 17)
{
if (descriptor[off + 8] == 0xff)
{
//0 1 2 3 4 5 6 7 8 9 10
//9 11 1 0 E6 43 0 6A FF 0 0 0 0 0 0 2 14 21 8C
//
//
//0 1 2 3 4 5 6 7 8 9 10
//9 11 1 0 E6 1C 41 1 FF FF FF FF FF FF FF FF FF 21 8C
int count = (len - 2) / 15;
for (int i = 0; i < count; ++i)
{
offset = off + i * 15;
if (offset >= descriptor.Length)
{
break;
}
ecm = new ECMEMM();
ecm.CaId = caId;
ecm.Pid = ((descriptor[offset + 4] & 0x1f) << 8) + descriptor[offset + 5];
ecm.ProviderId = ((descriptor[offset + 6]) << 8) + descriptor[offset + 7];
Add(newEcms, ecm);
ecm = new ECMEMM();
}
}
}
if (ecm.CaId == 0x100 && len >= 8)
{
if (descriptor[off + 7] == 0xe0 && descriptor[8] != 0xff)
{
//0 1 2 3 4 5 6 7 8 9 10
//9 11 1 0 E0 C1 3 E0 92 41 1 E0 93 40 1 E0 C4 0 64
//9 D 1 0 E0 B6 2 E0 B7 0 6A E0 B9 0 6C
if (descriptor[off + 6] > 0 || descriptor[off + 6] <= 9)
{
ecm.ProviderId = ((descriptor[off + 9]) << 8) + descriptor[off + 10];
}
}
}
offset = off + 6;
while (offset + 2 < descriptor.Length)
{
byte tagInd = descriptor[offset];
byte tagLen = descriptor[offset + 1];
if (tagLen + offset < descriptor.Length)
{
if (tagInd == 0x14)
{
ecm.ProviderId = (descriptor[offset + 2] << 16) + (descriptor[offset + 3] << 8) +
descriptor[offset + 4];
// Some providers sends wrong information in provider id (Boxer),
// so reset lower 4 bits for Via Access
if (ecm.CaId == 0x500)
{
ecm.ProviderId = ecm.ProviderId & 0xFFFFF0;
}
}
}
offset += (tagLen + 2);
}
}
off += (len + 2);
}
if (ecm.Pid > 0)
{
Add(newEcms, ecm);
}
}
