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TS optimalisations

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This commit is contained in:
Thulinma 2013-02-12 15:24:27 +01:00
parent af4caded70
commit 475fd0f138
2 changed files with 62 additions and 23 deletions
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82
lib/ts_packet.cpp
View file

@ -237,9 +237,10 @@ const char* TS::Packet::ToString(){
/// Generates a PES Lead-in for a video frame.
/// Starts at the first Free byte.
/// \param NewLen The length of this video frame.
/// \param NewLen The length of this frame.
/// \param PTS The timestamp of the frame.
void TS::Packet::PESVideoLeadIn(unsigned int NewLen, long long unsigned int PTS){
//NewLen += (PTS == 1 ? 9 : 19);
//NewLen += 19;
NewLen = 0;
strBuf += (char)0x00; //PacketStartCodePrefix
strBuf += (char)0x00; //PacketStartCodePrefix (Cont)
@ -248,25 +249,19 @@ void TS::Packet::PESVideoLeadIn(unsigned int NewLen, long long unsigned int PTS)
strBuf += (char)((NewLen & 0xFF00) >> 8); //PES PacketLength
strBuf += (char)(NewLen & 0x00FF); //PES PacketLength (Cont)
strBuf += (char)0x84; //Reserved + Flags
if (PTS != 1){
strBuf += (char)0xC0; //PTSOnlyFlag + Flags
strBuf += (char)0x0A; //PESHeaderDataLength
strBuf += (char)(0x30 + ((PTS & 0x1C0000000LL) >> 29) + 1); //Fixed + PTS
strBuf += (char)((PTS & 0x03FC00000LL) >> 22); //PTS (Cont)
strBuf += (char)(((PTS & 0x0003F8000LL) >> 14) + 1); //PTS (Cont)
strBuf += (char)((PTS & 0x000007F80LL) >> 7); //PTS (Cont)
strBuf += (char)(((PTS & 0x00000007FLL) << 1) + 1); //PTS (Cont)
strBuf += (char)(0x10 + ((PTS & 0x1C0000000LL) >> 29) + 1); //Fixed + DTS
strBuf += (char)((PTS & 0x03FC00000LL) >> 22); //DTS (Cont)
strBuf += (char)(((PTS & 0x0003F8000LL) >> 14) + 1); //DTS (Cont)
strBuf += (char)((PTS & 0x000007F80LL) >> 7); //DTS (Cont)
strBuf += (char)(((PTS & 0x00000007FLL) << 1) + 1); //DTS (Cont)
}else{
strBuf += (char)0x00; //PTSOnlyFlag + Flags
strBuf += (char)0x00; //PESHeaderDataLength
}
strBuf += (char)0xC0; //PTSOnlyFlag + Flags
strBuf += (char)0x0A; //PESHeaderDataLength
strBuf += (char)(0x30 + ((PTS & 0x1C0000000LL) >> 29) + 1); //Fixed + PTS
strBuf += (char)((PTS & 0x03FC00000LL) >> 22); //PTS (Cont)
strBuf += (char)(((PTS & 0x0003F8000LL) >> 14) + 1); //PTS (Cont)
strBuf += (char)((PTS & 0x000007F80LL) >> 7); //PTS (Cont)
strBuf += (char)(((PTS & 0x00000007FLL) << 1) + 1); //PTS (Cont)
strBuf += (char)(0x10 + ((PTS & 0x1C0000000LL) >> 29) + 1); //Fixed + DTS
strBuf += (char)((PTS & 0x03FC00000LL) >> 22); //DTS (Cont)
strBuf += (char)(((PTS & 0x0003F8000LL) >> 14) + 1); //DTS (Cont)
strBuf += (char)((PTS & 0x000007F80LL) >> 7); //DTS (Cont)
strBuf += (char)(((PTS & 0x00000007FLL) << 1) + 1); //DTS (Cont)
//PesPacket-Wise Prepended Data
strBuf += (char)0x00; //NALU StartCode
strBuf += (char)0x00; //NALU StartCode (Cont)
strBuf += (char)0x00; //NALU StartCode (Cont)
@ -277,15 +272,14 @@ void TS::Packet::PESVideoLeadIn(unsigned int NewLen, long long unsigned int PTS)
/// Generates a PES Lead-in for an audio frame.
/// Starts at the first Free byte.
/// \param NewLen The length of this audio frame.
/// \param PTS The timestamp of the audio frame.
/// \param NewLen The length of this frame.
/// \param PTS The timestamp of the frame.
void TS::Packet::PESAudioLeadIn(unsigned int NewLen, uint64_t PTS){
NewLen += 8;
strBuf += (char)0x00; //PacketStartCodePrefix
strBuf += (char)0x00; //PacketStartCodePrefix (Cont)
strBuf += (char)0x01; //PacketStartCodePrefix (Cont)
strBuf += (char)0xc0; //StreamType Audio
strBuf += (char)((NewLen & 0xFF00) >> 8); //PES PacketLength
strBuf += (char)(NewLen & 0x00FF); //PES PacketLength (Cont)
strBuf += (char)0x80; //Reserved + Flags
@ -298,6 +292,48 @@ void TS::Packet::PESAudioLeadIn(unsigned int NewLen, uint64_t PTS){
strBuf += (char)(((PTS & 0x00000007FLL) << 1) + 1); //PTS (Cont)
}
/// Generates a PES Lead-in for a video frame.
/// Prepends the lead-in to variable toSend, assumes toSend's length is all other data.
/// \param toSend Data that is to be send, will be modified.
/// \param PTS The timestamp of the frame.
void TS::Packet::PESVideoLeadIn(std::string & toSend, long long unsigned int PTS){
std::string tmpStr;
tmpStr.reserve(25);
tmpStr.append("\000\000\001\340\000\000\204\300\012", 9);
tmpStr += (char)(0x30 + ((PTS & 0x1C0000000LL) >> 29) + 1); //Fixed + PTS
tmpStr += (char)((PTS & 0x03FC00000LL) >> 22); //PTS (Cont)
tmpStr += (char)(((PTS & 0x0003F8000LL) >> 14) + 1); //PTS (Cont)
tmpStr += (char)((PTS & 0x000007F80LL) >> 7); //PTS (Cont)
tmpStr += (char)(((PTS & 0x00000007FLL) << 1) + 1); //PTS (Cont)
tmpStr += (char)(0x10 + ((PTS & 0x1C0000000LL) >> 29) + 1); //Fixed + DTS
tmpStr += (char)((PTS & 0x03FC00000LL) >> 22); //DTS (Cont)
tmpStr += (char)(((PTS & 0x0003F8000LL) >> 14) + 1); //DTS (Cont)
tmpStr += (char)((PTS & 0x000007F80LL) >> 7); //DTS (Cont)
tmpStr += (char)(((PTS & 0x00000007FLL) << 1) + 1); //DTS (Cont)
tmpStr.append("\000\000\000\001\011\360", 6);
toSend.insert(0, tmpStr);
}
/// Generates a PES Lead-in for an audio frame.
/// Prepends the lead-in to variable toSend, assumes toSend's length is all other data.
/// \param toSend Data that is to be send, will be modified.
/// \param PTS The timestamp of the frame.
void TS::Packet::PESAudioLeadIn(std::string & toSend, long long unsigned int PTS){
std::string tmpStr;
tmpStr.reserve(14);
unsigned int NewLen = toSend.size() + 8;
tmpStr.append("\000\000\001\300", 4);
tmpStr += (char)((NewLen & 0xFF00) >> 8); //PES PacketLength
tmpStr += (char)(NewLen & 0x00FF); //PES PacketLength (Cont)
tmpStr.append("\200\200\005", 3);
tmpStr += (char)(0x20 + ((PTS & 0x1C0000000LL) >> 29) + 1); //PTS
tmpStr += (char)((PTS & 0x03FC00000LL) >> 22); //PTS (Cont)
tmpStr += (char)(((PTS & 0x0003F8000LL) >> 14) + 1); //PTS (Cont)
tmpStr += (char)((PTS & 0x000007F80LL) >> 7); //PTS (Cont)
tmpStr += (char)(((PTS & 0x00000007FLL) << 1) + 1); //PTS (Cont)
toSend.insert(0, tmpStr);
}
/// Fills the free bytes of the TS::Packet.
/// Stores as many bytes from NewVal as possible in the packet.
/// \param NewVal The data to store in the packet.

3
lib/ts_packet.h
View file

@ -42,6 +42,9 @@ namespace TS {
const char* ToString();
void PESVideoLeadIn(unsigned int NewLen, long long unsigned int PTS = 1);
void PESAudioLeadIn(unsigned int NewLen, uint64_t PTS = 0);
static void PESAudioLeadIn(std::string & toSend, long long unsigned int PTS);
static void PESVideoLeadIn(std::string & toSend, long long unsigned int PTS);
void FillFree(std::string & PackageData);
int FillFree(const char* PackageData, int maxLen);
void AddStuffing(int NumBytes);