206 lines
8.2 KiB
C++
206 lines
8.2 KiB
C++
/// \file ts_packet.h
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/// Holds all headers for the TS Namespace.
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#pragma once
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#include <string>
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#include <map>
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#include <cmath>
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#include <stdint.h>//for uint64_t
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#include <iostream>
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#include <cstdio>
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#include <cstdlib>
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#include <algorithm>
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#include "dtsc.h"
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#include "checksum.h"
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/// Holds all TS processing related code.
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namespace TS {
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///Class for reading and writing TS Streams. The class is capable of analyzing a packet of 188 bytes
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///and calculating key values
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class Packet {
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public:
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//Constructors and fillers
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Packet();
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Packet(const Packet & rhs);
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~Packet();
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bool FromPointer(const char * data);
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bool FromFile(FILE * data);
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//Base properties
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void setPID(int NewPID);
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unsigned int getPID() const;
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void setContinuityCounter(int NewContinuity);
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int getContinuityCounter() const;
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void setPCR(int64_t NewVal);
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int64_t getPCR() const;
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int64_t getOPCR() const;
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void setAdaptationField(int NewVal);
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int getAdaptationField() const;
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int getAdaptationFieldLen() const;
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unsigned int getTransportScramblingControl() const;
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//Flags
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void setUnitStart(bool newVal);
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bool getUnitStart() const;
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void setRandomAccess(bool newVal);
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bool getRandomAccess() const;
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void setDiscontinuity(bool newVal);
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bool hasDiscontinuity() const;
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bool hasPCR() const;
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bool hasOPCR() const;
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bool hasSplicingPoint() const;
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bool hasTransportError() const;
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bool hasPriority() const;
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bool hasESpriority() const;
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//Helper functions
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operator bool() const;
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bool isPMT() const;
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void clear();
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void setDefaultPAT();
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unsigned int getDataSize() const;
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unsigned int getBytesFree() const;
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int fillFree(const char * PackageData, int maxLen);
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void addStuffing();
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void updPos(unsigned int newPos);
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//PES helpers
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static std::string & getPESVideoLeadIn(unsigned int len, unsigned long long PTS, unsigned long long offset, bool isAligned);
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static std::string & getPESAudioLeadIn(unsigned int len, unsigned long long PTS);
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//Printers and writers
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std::string toPrettyString(size_t indent = 0, int detailLevel = 3) const;
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const char * getPayload() const;
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int getPayloadLength() const;
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const char * checkAndGetBuffer() const;
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protected:
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char strBuf[189];
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unsigned int pos;
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};
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class ProgramAssociationTable : public Packet {
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public:
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ProgramAssociationTable & operator = (const Packet & rhs);
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char getOffset() const;
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char getTableId() const;
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short getSectionLength() const;
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short getTransportStreamId() const;
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char getVersionNumber() const;
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bool getCurrentNextIndicator() const;
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char getSectionNumber() const;
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char getLastSectionNumber() const;
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short getProgramCount() const;
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short getProgramNumber(short index) const;
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short getProgramPID(short index) const;
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int getCRC() const;
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std::string toPrettyString(size_t indent) const;
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};
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class ProgramMappingEntry {
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public:
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ProgramMappingEntry(char * begin, char * end);
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operator bool() const;
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int getStreamType() const;
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std::string getCodec() const;
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std::string getStreamTypeString() const;
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int getElementaryPid() const;
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int getESInfoLength() const;
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char * getESInfo() const;
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void advance();
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private:
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char* data;
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char* boundary;
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};
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class ProgramMappingTable : public Packet {
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public:
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ProgramMappingTable();
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ProgramMappingTable & operator = (const Packet & rhs);
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char getOffset() const;
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void setOffset(char newVal);
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char getTableId() const;
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void setTableId(char newVal);
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short getSectionLength() const;
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void setSectionLength(short newVal);
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short getProgramNumber() const;
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void setProgramNumber(short newVal);
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char getVersionNumber() const;
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void setVersionNumber(char newVal);
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bool getCurrentNextIndicator() const;
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void setCurrentNextIndicator(bool newVal);
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char getSectionNumber() const;
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void setSectionNumber(char newVal);
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char getLastSectionNumber() const;
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void setLastSectionNumber(char newVal);
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short getPCRPID() const;
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void setPCRPID(short newVal);
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short getProgramInfoLength() const;
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void setProgramInfoLength(short newVal);
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short getProgramCount() const;
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void setProgramCount(short newVal);
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ProgramMappingEntry getEntry(int index) const;
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void setStreamType(char newVal, short index);
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char getStreamType(short index) const;
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void setElementaryPID(short newVal, short index);
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short getElementaryPID(short index) const;
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void setESInfoLength(short newVal,short index);
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short getESInfoLength(short index) const;
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int getCRC() const;
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void calcCRC();
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std::string toPrettyString(size_t indent) const;
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};
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/// Constructs an audio header to be used on each audio frame.
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/// The length of this header will ALWAYS be 7 bytes, and has to be
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/// prepended on each audio frame.
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/// \param FrameLen the length of the current audio frame.
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/// \param initData A string containing the initalization data for this track's codec.
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static inline std::string getAudioHeader(int FrameLen, std::string initData) {
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char StandardHeader[7] = {0xFF, 0xF1, 0x00, 0x00, 0x00, 0x1F, 0xFC};
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FrameLen += 7;
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StandardHeader[2] = ((((initData[0] >> 3) - 1) << 6) & 0xC0); //AAC Profile - 1 ( First two bits )
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StandardHeader[2] |= ((((initData[0] & 0x07) << 1) | ((initData[1] >> 7) & 0x01)) << 2); //AAC Frequency Index
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StandardHeader[2] |= ((initData[1] & 0x20) >> 5); //AAC Channel Config
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StandardHeader[3] = ((initData[1] & 0x18) << 3); //AAC Channel Config (cont.)
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StandardHeader[3] |= ((FrameLen & 0x00001800) >> 11);
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StandardHeader[4] = ((FrameLen & 0x000007F8) >> 3);
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StandardHeader[5] |= ((FrameLen & 0x00000007) << 5);
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return std::string(StandardHeader, 7);
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}
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/// A standard Program Association Table, as generated by FFMPEG.
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/// Seems to be independent of the stream.
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//0x47 = sync byte
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//0x4000 = transport error(1) = 0, payload unit start(1) = 1, priority(1) = 0, PID(13) = 0
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//0x10 = transportscrambling(2) = 0, adaptation(2) = 1, continuity(4) = 0
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//0x00 = pointer = 0
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//0x00 = table ID = 0 = PAT
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//0xB00D = section syntax(1) = 1, 0(1)=0, reserved(2) = 3, section_len(12) = 13
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//0x0001 = transport stream id = 1
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//0xC1 = reserved(2) = 3, version(5)=0, curr_next_indi(1) = 1
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//0x00 = section_number = 0
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//0x00 = last_section_no = 0
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//0x0001 = ProgNo = 1
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//0xF000 = reserved(3) = 7, network pid = 4096
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//0x2AB104B2 = CRC32
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static char PAT[188] = {0x47, 0x40, 0x00, 0x10, 0x00, 0x00, 0xB0, 0x0D, 0x00, 0x01, 0xC1, 0x00, 0x00, 0x00, 0x01, 0xF0, 0x00, 0x2A, 0xB1, 0x04,
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0xB2, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
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};
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const char * createPMT(std::set<unsigned long>& selectedTracks, DTSC::Meta& myMeta, int contCounter=0);
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} //TS namespace
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