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Documentation fix TS Analyser

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This commit is contained in:
Erik Zandvliet 2011-08-24 10:44:29 +02:00
parent b35ef497ea
commit 40f857d06c
1 changed files with 114 additions and 80 deletions
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194
TS_Analyser/main.cpp
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@ -5,92 +5,91 @@
#include <vector>
#include <fstream>
/// Contains all data unique to a single entry in the PAT
struct program_association_table_entry {
unsigned int Program_Number;
unsigned int Program_Number;///< Number of the program adressed
unsigned char Reserved;
unsigned int Program_Map_PID;
unsigned int Program_Map_PID;///< PID of the map associated with this program
};
/// The program association table ( PAT )
struct program_association_table {
unsigned char Pointer_Field;
unsigned char Table_ID;
bool Section_Syntax_Indicator;
unsigned char Pointer_Field;///< A single padding character
unsigned char Table_ID;///< ID of this table
bool Section_Syntax_Indicator;///< Indicates whether the payload confirms to specification, or is private
bool Zero;
unsigned char Reserved_1;
unsigned int Section_Length;
unsigned int Transport_Stream_ID;
unsigned int Section_Length;///< Length of this section of the PAT
unsigned int Transport_Stream_ID;///< ID of the stream
unsigned char Reserved_2;
unsigned char Version_Number;
bool Current_Next_Indicator;
unsigned char Section_Number;
unsigned char Last_Section_Number;
unsigned char Version_Number;///< Version of this section
bool Current_Next_Indicator;///< Currently applicable
unsigned char Section_Number;///< Number of this section
unsigned char Last_Section_Number;///< Amount of sections in the complete table
std::vector<program_association_table_entry> Entries;
unsigned int CRC_32;
};
/// An entry of the PMT
struct program_mapping_table_entry {
unsigned char Stream_Type;
unsigned char Stream_Type;///< Type of stream we encounter
unsigned char Reserved_1;
unsigned int Elementary_PID;
unsigned int Elementary_PID;///< PID of the packages carying the elementary stream for this entry
unsigned char Reserved_2;
unsigned int ES_Info_Length;
unsigned int ES_Info_Length;///< Length of extra info. Not needed for understanding the file
};
/// The program mapping table ( PMT )
struct program_mapping_table {
unsigned char Pointer_Field;
unsigned char Table_ID;
bool Section_Syntax_Indicator;
unsigned char Pointer_Field;///< A single padding character
unsigned char Table_ID;///< ID of this table
bool Section_Syntax_Indicator;///< Indicates whether the payload confirms to specification, or is private
bool Zero;
unsigned char Reserved_1;
unsigned int Section_Length;
unsigned int Program_Number;
unsigned int Section_Length;///< Length of this section
unsigned int Program_Number;///< Program number in stream
unsigned char Reserved_2;
unsigned char Version_Number;
bool Current_Next_Indicator;
unsigned char Section_Number;
unsigned char Last_Section_Number;
unsigned char Version_Number;///< Version of this section
bool Current_Next_Indicator;///< Currently applicable
unsigned char Section_Number;///< Number of this section
unsigned char Last_Section_Number;///< Amount of sections in PMT
unsigned char Reserved_3;
unsigned int PCR_PID;
unsigned int PCR_PID;///< PID of the packets that contain Program Counter References
unsigned char Reserved_4;
unsigned int Program_Info_Length;
unsigned int Program_Info_Length;///< Length of the program descriptors. Skip for analysis
//vector Descriptors
std::vector<program_mapping_table_entry> Entries;
unsigned int CRC_32;
};
/// The adaptation field
struct adaptation_field {
unsigned char Adaptation_Field_Length;
unsigned char Adaptation_Field_Length;///Lenght of the complete field, greater or equal to 0
bool Discontinuity_Indicator;
bool Random_Access_Indicator;
bool Elementary_Stream_Priority_Indicator;
bool PCR_Flag;
bool OPCR_Flag;
bool PCR_Flag;///< PCR Field existent
bool OPCR_Flag;///< OPCR Field existent
bool Splicing_Point_Flag;
bool Transport_Private_Data_Flag;
bool Adaptation_Field_Extension_Flag;
unsigned char Program_Clock_Reference_Base_MSB;
unsigned int Program_Clock_Reference_Base;
unsigned char Program_Clock_Reference_Base_MSB;///< Most significant bit for the Base value of the PCR
unsigned int Program_Clock_Reference_Base;///< Least significant 32 bits for the Base value of the PCR
unsigned char PCR_Reserved;
unsigned int Program_Clock_Reference_Extension;
unsigned int Program_Clock_Reference_Extension;///< Extension of the PCR
unsigned char Original_Program_Clock_Reference_Base_MSB;
unsigned int Original_Program_Clock_Reference_Base;
unsigned char Original_Program_Clock_Reference_Base_MSB;///< Most significant bit for the Base value of the OPCR
unsigned int Original_Program_Clock_Reference_Base;///< Least significant 32 bits for the Base value of the OPCR
unsigned char OPCR_Reserved;
unsigned int Original_Program_Clock_Reference_Extension;
unsigned char Splice_Countdown;
unsigned char Transport_Private_Data_Length;
std::vector<unsigned char> Private_Data_Byte;
unsigned char Adaptation_Field_Extension_Length;
unsigned int Original_Program_Clock_Reference_Extension;///< Extension of the OPCR
};
/// The general structure of a PES packet
struct pes_packet {
unsigned int Packet_Start_Code_Prefix;
unsigned char Stream_ID;
unsigned int PES_Packet_Length;
unsigned int Packet_Start_Code_Prefix;///< Prefix, should be 0x000001
unsigned char Stream_ID;///< ID of the current stream
unsigned int PES_Packet_Length;///< Length of the PES packet
unsigned char Two;
unsigned char PES_Scrambling_Control;
@ -98,33 +97,37 @@ struct pes_packet {
bool Data_Alignment_Indicator;
bool Copyright;
bool Original_Or_Copy;
unsigned char PTS_DTS_Flags;
unsigned char PTS_DTS_Flags;///Presentation Time Stamp and/or Display Time Stamp available
bool ESCR_Flag;
bool ES_Rate_Flag;
bool DSM_Trick_Mode_Flag;
bool Additional_Copy_Info_Flag;
bool PES_CRC_Flag;
bool PES_Extension_Flag;
unsigned char PES_Header_Data_Length;
unsigned char PES_Header_Data_Length;///< Length of the header
unsigned char PTS_Spacer;
unsigned char PTS_MSB;
unsigned int PTS;
unsigned char PTS_Spacer;///< Spacer, value depends on the flag
unsigned char PTS_MSB;///< Most significant bit of the PTS
unsigned int PTS;///< Least significant 32 bits of the PTS
unsigned char DTS_Spacer;
unsigned char DTS_MSB;
unsigned int DTS;
unsigned char DTS_Spacer;///< Spacer, value depends on the flag
unsigned char DTS_MSB;///< Most significant bit of the DTS
unsigned int DTS;///< Least significant 32 bits of the DTS
std::vector<unsigned char> Header_Stuffing;
std::vector<unsigned char> First_Bytes;
std::vector<unsigned char> Header_Stuffing;///< Header stuffing, if present
std::vector<unsigned char> First_Bytes;///< Storage capacity for the first few bytes
};
/// Fills a PES Packet
/// \param PES The packet in which the data should be stored
/// \param TempChar The current TS packet data
/// \param Offset Offset of the PES data, changed if adaptation field exists
void fill_pes( pes_packet & PES, unsigned char * TempChar, int Offset = 4 ) {
PES.Packet_Start_Code_Prefix = ( TempChar[Offset] << 16 ) + ( TempChar[Offset+1] << 8 ) + TempChar[Offset+2];
PES.Stream_ID = TempChar[Offset+3];
PES.PES_Packet_Length = ( TempChar[Offset+4] << 8 ) + TempChar[Offset+5];
Offset += 6;
if( true ) { //TODO: Fill in boolean, but for Buck Bunny Always
if( true ) { //Always for streams yet encountered
PES.Two = ( TempChar[Offset] & 0xC0 ) >> 6;
PES.PES_Scrambling_Control = ( TempChar[Offset] & 0x30 ) >> 4;
PES.PES_Priority = ( TempChar[Offset] & 0x08 ) >> 3;
@ -175,12 +178,15 @@ void fill_pes( pes_packet & PES, unsigned char * TempChar, int Offset = 4 ) {
}
}
/// Prints a PES packet to STDOUT
/// \param PES The packet to be print
/// \param offset A string indicating the indentation of the outputed data
void print_pes( pes_packet PES, std::string offset="\t" ) {
printf( "%sPES Header\n", offset.c_str() );
printf( "%s\tPacket Start Code Prefix\t%.6X\n", offset.c_str(), PES.Packet_Start_Code_Prefix );
printf( "%s\tStream ID\t\t\t%X\n", offset.c_str(), PES.Stream_ID );
printf( "%s\tPES Packet Length\t\t%X\n", offset.c_str(), PES.PES_Packet_Length );
if( true ) { //TODO: Fill in boolean, but for Buck Bunny Always
if( true ) { //Always for streams yet encountered
printf( "%s\tTwo:\t\t\t\t%d\n", offset.c_str(), PES.Two );
printf( "%s\tPES Scrambling Control:\t\t%d\n", offset.c_str(), PES.PES_Scrambling_Control );
printf( "%s\tPES Priority:\t\t\t%d\n", offset.c_str(), PES.PES_Priority );
@ -216,6 +222,36 @@ void print_pes( pes_packet PES, std::string offset="\t" ) {
}
}
/// Fills a PAT structure with the right data
/// \param PAT the structure to be filled
/// \param TempChar The TS packet data
void fill_pat( program_association_table & PAT, unsigned char * TempChar ) {
PAT.Pointer_Field = TempChar[4];
PAT.Table_ID = TempChar[5];
PAT.Section_Syntax_Indicator = ((TempChar[6] & 0x80 ) != 0 );
PAT.Zero = (( TempChar[6] & 0x40 ) != 0 );
PAT.Reserved_1 = (( TempChar[6] & 0x30 ) >> 4 );
PAT.Section_Length = (( TempChar[6] & 0x0F ) << 8 ) + TempChar[7];
PAT.Transport_Stream_ID = (( TempChar[8] << 8 ) + TempChar[9] );
PAT.Reserved_2 = (( TempChar[10] & 0xC0 ) >> 6 );
PAT.Version_Number = (( TempChar[10] & 0x01 ) >> 1 );
PAT.Current_Next_Indicator = (( TempChar[10] & 0x01 ) != 0 );
PAT.Section_Number = TempChar[11];
PAT.Last_Section_Number = TempChar[12];
PAT.Entries.clear( );
for( int i = 0; i < PAT.Section_Length - 9; i += 4 ) {
program_association_table_entry PAT_Entry;
PAT_Entry.Program_Number = ( TempChar[13+i] << 8 ) + TempChar[14+i];
PAT_Entry.Reserved = ( TempChar[15+i] & 0xE0 ) >> 5;
PAT_Entry.Program_Map_PID = (( TempChar[15+i] & 0x1F ) << 8 ) + TempChar[16+i];
PAT.Entries.push_back( PAT_Entry );
}
PAT.CRC_32 = ( TempChar[8+PAT.Section_Length-4] << 24 ) + ( TempChar[8+PAT.Section_Length-3] << 16 ) + ( TempChar[8+PAT.Section_Length-2] << 8 ) + ( TempChar[8+PAT.Section_Length-1] );
}
/// Prints a PAT to STDOUT
/// \param PAT The table to be print
/// \param offset A string indicating the indentation of the outputed data
void print_pat( program_association_table PAT, bool Pointer_Field = false, std::string offset="\t" ) {
printf( "%sProgram Association Table\n", offset.c_str() );
if( Pointer_Field ) {
@ -241,30 +277,9 @@ void print_pat( program_association_table PAT, bool Pointer_Field = false, std::
printf( "\n%s\tCRC_32:\t\t\t\t%X\n", offset.c_str(), PAT.CRC_32 );
}
void fill_pat( program_association_table & PAT, unsigned char * TempChar ) {
PAT.Pointer_Field = TempChar[4];
PAT.Table_ID = TempChar[5];
PAT.Section_Syntax_Indicator = ((TempChar[6] & 0x80 ) != 0 );
PAT.Zero = (( TempChar[6] & 0x40 ) != 0 );
PAT.Reserved_1 = (( TempChar[6] & 0x30 ) >> 4 );
PAT.Section_Length = (( TempChar[6] & 0x0F ) << 8 ) + TempChar[7];
PAT.Transport_Stream_ID = (( TempChar[8] << 8 ) + TempChar[9] );
PAT.Reserved_2 = (( TempChar[10] & 0xC0 ) >> 6 );
PAT.Version_Number = (( TempChar[10] & 0x01 ) >> 1 );
PAT.Current_Next_Indicator = (( TempChar[10] & 0x01 ) != 0 );
PAT.Section_Number = TempChar[11];
PAT.Last_Section_Number = TempChar[12];
PAT.Entries.clear( );
for( int i = 0; i < PAT.Section_Length - 9; i += 4 ) {
program_association_table_entry PAT_Entry;
PAT_Entry.Program_Number = ( TempChar[13+i] << 8 ) + TempChar[14+i];
PAT_Entry.Reserved = ( TempChar[15+i] & 0xE0 ) >> 5;
PAT_Entry.Program_Map_PID = (( TempChar[15+i] & 0x1F ) << 8 ) + TempChar[16+i];
PAT.Entries.push_back( PAT_Entry );
}
PAT.CRC_32 = ( TempChar[8+PAT.Section_Length-4] << 24 ) + ( TempChar[8+PAT.Section_Length-3] << 16 ) + ( TempChar[8+PAT.Section_Length-2] << 8 ) + ( TempChar[8+PAT.Section_Length-1] );
}
/// Fills a PMT structure with the right data
/// \param PMT the structure to be filled
/// \param TempChar The TS packet data
void fill_pmt( program_mapping_table & PMT, unsigned char * TempChar ) {
int CurrentOffset;
PMT.Pointer_Field = TempChar[4];
@ -298,6 +313,9 @@ void fill_pmt( program_mapping_table & PMT, unsigned char * TempChar ) {
PMT.CRC_32 = ( TempChar[CurrentOffset] << 24 ) + ( TempChar[CurrentOffset+1] << 16 ) + ( TempChar[CurrentOffset+2] << 8 ) + ( TempChar[CurrentOffset+3] );
}
/// Prints a PMT to STDOUT
/// \param PMT The table to be print
/// \param offset A string indicating the indentation of the outputed data
void print_pmt( program_mapping_table PMT, bool Pointer_Field = false, std::string offset="\t" ) {
if( Pointer_Field ) {
printf( "%s\tPointer Field:\t\t\t%X\n", offset.c_str(), PMT.Pointer_Field );
@ -329,6 +347,9 @@ void print_pmt( program_mapping_table PMT, bool Pointer_Field = false, std::stri
printf( "%s\tCRC 32\t\t%X\n", offset.c_str(), PMT.CRC_32 );
}
/// Fills an AF structure with the right data
/// \param AF the structure to be filled
/// \param TempChar The TS packet data
void fill_af( adaptation_field & AF, unsigned char * TempChar ) {
AF.Adaptation_Field_Length = TempChar[4];
AF.Discontinuity_Indicator = (( TempChar[5] & 0x80 ) >> 7 );
@ -353,6 +374,9 @@ void fill_af( adaptation_field & AF, unsigned char * TempChar ) {
}
}
/// Prints an AF to STDOUT
/// \param AF The Adaptation Field to be print
/// \param offset A string indicating the indentation of the outputed data
void print_af( adaptation_field AF, std::string offset="\t" ) {
printf( "%sAdaptation Field\n", offset.c_str() );
printf( "%s\tAdaptation Field Length\t\t\t%X\n", offset.c_str(), AF.Adaptation_Field_Length );
@ -371,6 +395,10 @@ void print_af( adaptation_field AF, std::string offset="\t" ) {
}
}
/// Locates a Packet ID in the PAT
/// \param PAT The PAT to look in
/// \param PID The PID to check for existense
/// \return The program number of the PAT, or -1 if not found
int find_pid_in_pat( program_association_table PAT, unsigned int PID ) {
for( int i = 0; i < PAT.Entries.size(); i++ ) {
if( PAT.Entries[i].Program_Map_PID == PID ) {
@ -380,6 +408,10 @@ int find_pid_in_pat( program_association_table PAT, unsigned int PID ) {
return -1;
}
/// Checks whether a packet is part of an elementary stream
/// \param PMT The program mapping table
/// \param PID The PID of the packet
/// \return PID is found in the elementary streams of PMT
bool is_elementary_pid( program_mapping_table PMT, unsigned int PID ) {
for( int i = 0; i < PMT.Entries.size(); i++ ) {
if( PMT.Entries[i].Elementary_PID == PID ) {
@ -389,6 +421,8 @@ bool is_elementary_pid( program_mapping_table PMT, unsigned int PID ) {
return false;
}
/// The main function of the analyser
int main( ) {
std::string File;
unsigned int BlockNo = 1;