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ts2pes.c
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ts2pes.c
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/*
* read transport stream
* Copyright (C) 1999-2004 Christian Wolff
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdint.h>
#include "ts2pes.h"
#include "crc32.h"
unsigned long CRC;
// current stream parameters
#define TS_packet_length 188
// list of TS-Programs (as linked list)
ElementaryStream *first_ES=NULL;
// the curent valid PAT from PID 0x0000
ProgramAssociationTable *PAT=NULL;
// the intermediate PAT while building it from PID 0x0000
ProgramAssociationTable *current_PAT,*next_PAT;
// the curent valid CAT from PID 0x0001
ConditionalAccessTable *CAT=NULL;
// the intermediate CAT while building it from PID 0x0001
ConditionalAccessTable *current_CAT,*next_CAT;
// list of Programs (as linked list)
ProgramMapTable *first_PMT=NULL, *first_nextPMT=NULL, *phantom_PMT=NULL;
// -------------------------------------------------------------- //
// List management function for transport stream packet headers
// -------------------------------------------------------------- //
ElementaryStream *find_ES(unsigned int PID) { // find TSP with this PID
ElementaryStream *ptr=first_ES;
while (ptr!=NULL) {
if ((ptr->TSP!=NULL) && (ptr->TSP->PID==PID)) return ptr;
ptr=(ElementaryStream *)ptr->next;
}
return ptr;
}
ElementaryStream *new_ES(unsigned int PID) { // find or create TSP with this PID
ElementaryStream *ptr=first_ES;
while (ptr!=NULL) {
if ((ptr->TSP!=NULL) && (ptr->TSP->PID==PID)) return ptr;
ptr=(ElementaryStream *)ptr->next;
}
if (first_ES==NULL) {
first_ES=(ElementaryStream *)malloc(sizeof(ElementaryStream));
ptr=first_ES;
} else {
ptr=first_ES;
while (ptr->next!=NULL) ptr=(ElementaryStream *)ptr->next;
ptr->next=malloc(sizeof(ElementaryStream));
ptr=(ElementaryStream *)ptr->next;
}
if (ptr==NULL) return NULL;
ptr->next=NULL;
ptr->TSP=(TransportStreamProgram *)malloc(sizeof(TransportStreamProgram));
if (ptr->TSP==NULL) return NULL;
ptr->TSP->AF=NULL;
ptr->TSP->continuity_counter=0x0F; // For continuity. First real CC is 0x00
ptr->TSP->PID=PID; // set PID
ptr->Payload=NULL;
ptr->payload_count=0;
ptr->payload_length=0;
return ptr;
}
void kill_ES(unsigned int PID) { // search&destroy(tm Henry Rollins) TSP with this PID
ElementaryStream *ptr=first_ES, *ptr0=NULL;
while (ptr!=NULL) {
if ((ptr->TSP!=NULL) && (ptr->TSP->PID==PID)) {
if (ptr->TSP!=NULL) free(ptr->TSP);
if (ptr->Payload!=NULL) free(ptr->Payload);
if (ptr0==NULL) {
first_ES=ptr->next;
free(ptr);
ptr=first_ES;
} else {
ptr0->next=ptr->next;
free(ptr);
ptr=ptr0;
}
}
ptr0=ptr;
if (ptr!=NULL) ptr=(ElementaryStream *)ptr->next;
}
}
// -------------------------------------------------------------- //
// List management functions for program map tables
// -------------------------------------------------------------- //
ProgramMapTable *find_PMT(ProgramMapTable **anker, unsigned int program_number) { // find TSP with this program_number
ProgramMapTable *ptr=*anker;
while (ptr!=NULL) {
if ((ptr->program_number==program_number)) return ptr;
ptr=(ProgramMapTable *)ptr->next;
}
return ptr;
}
ProgramMapTable *new_PMT(ProgramMapTable **anker, unsigned int program_number) { // find or create TSP with this program_number
int i;
ProgramMapTable *ptr=*anker;
while (ptr!=NULL) {
if ((ptr->program_number==program_number)) return ptr;
ptr=(ProgramMapTable *)ptr->next;
}
if (*anker==NULL) {
*anker=(ProgramMapTable *)malloc(sizeof(ProgramMapTable));
ptr=*anker;
} else {
ptr=*anker;
while (ptr->next!=NULL) ptr=(ProgramMapTable *)ptr->next;
ptr->next=malloc(sizeof(ProgramMapTable));
ptr=(ProgramMapTable *)ptr->next;
}
if (ptr==NULL) return NULL;
ptr->next=NULL;
ptr->descriptor_count=0;
for (i=0; i<16; i++) ptr->descriptor[i]=NULL;
ptr->program_count=0;
for (i=0; i<256; i++) ptr->program[i]=NULL;
ptr->program_number=program_number; // set program_number
return ptr;
}
void kill_PMT(ProgramMapTable **anker, unsigned int program_number) { // search&destroy(tm Henry Rollins) TSP with this program_number
ProgramMapTable *ptr=*anker, *ptr0=NULL;
int i,j;
while (ptr!=NULL) {
if ((ptr->program_number==program_number)) {
if (ptr0==NULL) {
*anker=(ProgramMapTable *)ptr->next;
ptr0=*anker;
} else {
ptr0->next=ptr->next;
}
for (i=0; i<16; i++) if (ptr->descriptor[i]!=NULL) {
if (ptr->descriptor[i]->data!=NULL) free(ptr->descriptor[i]->data);
free(ptr->descriptor[i]);
}
for (i=0; i<256; i++) if (ptr->program[i]!=NULL) {
for (j=0; j<16; j++) if (ptr->program[i]->descriptor[j]!=NULL) {
if (ptr->program[i]->descriptor[j]->data!=NULL) free(ptr->program[i]->descriptor[j]->data);
free(ptr->program[i]->descriptor[j]);
}
free(ptr->program[i]);
}
free(ptr);
ptr=ptr0;
}
ptr0=ptr;
if (ptr!=NULL) ptr=(ProgramMapTable *)ptr->next;
}
}
// -------------------------------------------------------------- //
// debug output of header information
// -------------------------------------------------------------- //
void print_TP(TransportStreamProgram *TP) { // debug output of TP-Header
printf("- Transport Packet Header -\n\
transport_error_indicator: %i\n\
payload_unit_start_indicator: %i\n\
transport_priority: %i\n\
PID: 0x%04X\n\
transport_scrambling_control: 0x%02X\n\
adaption_field_control_1: %i\n\
adaption_field_control_0: %i\n\
continuity_counter: 0x%02X\n\
\n",
((TP->transport_error_indicator)?1:0),
((TP->payload_unit_start_indicator)?1:0),
((TP->transport_priority)?1:0),
TP->PID,
TP->transport_scrambling_control,
((TP->adaption_field_control_1)?1:0),
((TP->adaption_field_control_0)?1:0),
TP->continuity_counter
);
}
void print_AF(AdaptionField *AF) { // debug output of AF
int i;
printf("- Adaption Field -\n\
discontinuity_indicator: %i\n\
random_access_indicator: %i\n\
elementary_stream_priority_indicator: %i\n\
PCR_flag: %i\n\
OPCR_flag: %i\n\
splicing_point_flag: %i\n\
transport_private_data_flag: %i\n\
adaption_field_extension_flag: %i\n",
((AF->discontinuity_indicator)?1:0),
((AF->random_access_indicator)?1:0),
((AF->elementary_stream_priority_indicator)?1:0),
((AF->PCR_flag)?1:0),
((AF->OPCR_flag)?1:0),
((AF->splicing_point_flag)?1:0),
((AF->transport_private_data_flag)?1:0),
((AF->adaption_field_extension_flag)?1:0));
if (AF->PCR_flag) printf("\
program_clock_reference_base: %lld\n\
program_clock_reference_extension: %d\n",
AF->program_clock_reference_base,
AF->program_clock_reference_extension);
if (AF->OPCR_flag) printf("\
original_program_clock_reference_base: %lld\n\
original_program_clock_reference_extension: %d\n",
AF->original_program_clock_reference_base,
AF->original_program_clock_reference_extension);
if (AF->splicing_point_flag) printf("SC: %i\n",
AF->splice_countdown);
if (AF->transport_private_data_flag) {
printf("\
transport_private_data_length: %i\n",
AF->transport_private_data_length);
for (i=0; i<AF->transport_private_data_length; i++) {
printf("%02X ",(AF->private_data_byte[i] & 0xFF));
if (((i % 24)==23) || (i == AF->transport_private_data_length-1)) printf("\n");
}
}
if (AF->adaption_field_extension_flag) {
printf("\
adaption_field_extension_length: %i\n\
ltw_flag: %i\n\
piecewise_rate_flag: %i\n\
seamless_splice_flag: %i\n",
AF->adaption_field_extension_length,
((AF->ltw_flag)?1:0),
((AF->piecewise_rate_flag)?1:0),
((AF->seamless_splice_flag)?1:0));
if (AF->ltw_flag) {
printf("\
ltw_valid_flag: %i\n\
ltw_offset: %i\n",
((AF->ltw_valid_flag)?1:0),
AF->ltw_offset);
}
if (AF->piecewise_rate_flag) {
printf("\
piecewise_rate: %i\n",
AF->piecewise_rate);
}
if (AF->seamless_splice_flag) {
printf("\
splice_type: 0x%01X\n\
DTS_next_AU: %lld\n",
AF->splice_type,
AF->DTS_next_AU);
}
}
printf("\n");
}
void print_PAT(ProgramAssociationTable *PAT) { // debug output of PAT
int i;
printf("- Program Association Table -\n\
table_id: %i\n\
section_syntax_indicator: %i\n\
private_indicator: %i\n\
section_length: %i\n\
transport_stream_id: 0x%04X\n\
version_number: %i\n\
current_next_indicator: %i\n\
section_number: %i\n\
last_section_number: %i\n\
Table Size: %i\n\
PN PID\n",
PAT->table_id,
((PAT->section_syntax_indicator)?1:0),
((PAT->private_indicator)?1:0),
PAT->section_length,
PAT->transport_stream_id,
PAT->version_number,
((PAT->current_next_indicator)?1:0),
PAT->section_number,
PAT->last_section_number,
PAT->program_count);
for (i=0; i<PAT->program_count; i++) {
printf(" 0x%04X 0x%04X\n",PAT->program_number[i],PAT->PID[i]);
}
printf("\n");
}
void print_CAT(ConditionalAccessTable *CAT) { // debug output of CAT
int i;
printf("- Conditional Access Table -\n\
table_id: %i\n\
section_syntax_indicator: %i\n\
private_indicator: %i\n\
section_length: %i\n\
version_number: %i\n\
current_next_indicator: %i\n\
section_number: %i\n\
last_section_number: %i\n\
Table Size: %i\n\
SysID CA_PID\n",
CAT->table_id,
((CAT->section_syntax_indicator)?1:0),
((CAT->private_indicator)?1:0),
CAT->section_length,
CAT->version_number,
((CAT->current_next_indicator)?1:0),
CAT->section_number,
CAT->last_section_number,
CAT->descriptor_count);
for (i=0; i<CAT->descriptor_count; i++) {
printf("\
0x%04X 0x%04X",
CAT->CA_descriptor[i]->CA_system_ID,
CAT->CA_descriptor[i]->CA_PID);
show_descriptor(CAT->CA_descriptor[i]->descriptor,1);
printf("\n");
}
printf("\n");
}
void print_PMT(ProgramMapTable *PMT) { // debug output of PMT
int i,j;
Program *prog; // temp. pointer
printf("- Program Map Table -\n\
table_id: %i\n\
section_syntax_indicator: %i\n\
private_indicator: %i\n\
section_length: %i\n\
program_number: 0x%04X\n\
version_number: %i\n\
current_next_indicator: %i\n\
section_number: %i\n\
last_section_number: %i\n\
PCR_PID: 0x%04X\n\
Table Size: %i\n\
type PID\n",
PMT->table_id,
((PMT->section_syntax_indicator)?1:0),
((PMT->private_indicator)?1:0),
PMT->section_length,
PMT->program_number,
PMT->version_number,
((PMT->current_next_indicator)?1:0),
PMT->section_number,
PMT->last_section_number,
PMT->PCR_PID,
PMT->program_count);
for (i=0; i<PMT->descriptor_count; i++) {
show_descriptor(PMT->descriptor[i],1);
}
for (i=0; i<PMT->program_count; i++) {
prog=PMT->program[i];
printf(" 0x%02X 0x%04X\n",prog->stream_type,prog->elementary_PID);
for (j=0; j<prog->descriptor_count; j++) {
show_descriptor(prog->descriptor[j],1);
}
}
printf("\n");
}
void print_TSP(TransportStreamProgram *TSP) { // debug output of whole TP
print_TP(TSP);
if (TSP->AF!=NULL) print_AF(TSP->AF);
}
// -------------------------------------------------------------- //
// parsing of one PSI, collected from the TS-packet payload
// -------------------------------------------------------------- //
int parse_PSI(ElementaryStream *ES, unsigned int PSI, int verbose, int useCRC) {
// header data for all PSI's
unsigned char table_id; // Table ID
unsigned int section_syntax_indicator, // Section Syntax Indicator
private_indicator, // Private Indicator
section_length, // Section Length
PSI_word; // Transport Stream ID / Program Number / Table ID Extension
unsigned char version_number; // Version Number
unsigned int current_next_indicator, // Current/Next Indicator
section_number, // Section Number
last_section_number; // Last Section Number
ProgramMapTable *PMT, *ptr; // current PMT
int i,j,n, // counters
program_info_length, // ProgramInformationLength
ES_info_length, // ESinfolength
desc_length; // descriptor length
unsigned char ch, // single byte
desc_tag; // descriptor tag
Program *prog; // temp. pointer
table_id=ES->Payload[0];
section_syntax_indicator=ES->Payload[1] & 0x80;
private_indicator=ES->Payload[1] & 0x40;
section_length=((ES->Payload[1] << 8) | (ES->Payload[2] & 0xFF)) & 0x0FFF;
if (section_syntax_indicator) {
PSI_word=((ES->Payload[3] << 8) | (ES->Payload[4] & 0xFF)) & 0xFFFF;
version_number=(ES->Payload[5] & 0x3E) >> 1;
current_next_indicator=ES->Payload[5] & 0x01;
section_number=ES->Payload[6] & 0xFF;
last_section_number=ES->Payload[7] & 0xFF;
} else {
PSI_word=0;
version_number=0;
current_next_indicator=0;
section_number=0;
last_section_number=0;
}
if (section_length+3 > ES->payload_count) {
if (verbose) printf("ERROR in PSI-header, section length shows %i byte, but there are only %i\n",
section_length+3,
ES->payload_count);
return 0x0104;
}
if (section_syntax_indicator)
CRC=update_crc_32_block(CRC_INIT_32,ES->Payload,section_length+3);
if (verbose) {
printf("PSI Section: %i bytes\n",section_length+3);
for (i=0; i<section_length+3; i++) {
printf("%02X ",(ES->Payload[i] & 0xFF));
if ((i % 24)==23) printf("\n");
}
printf("\n");
if (section_syntax_indicator)
printf("CRC of section %i: 0x%08lX - %s\n",
section_number,
CRC,
((CRC==0x00000000L)?"OK":"NG")); // if you do it wrong, you get CRC==0xC704DD7BL
}
if (section_syntax_indicator && CRC) { // CRC error
if (verbose) printf("ERROR in PSI - CRC error (0x%08lX)\n",CRC);
if (useCRC) return 0x0204;
}
if (PSI==1) { // This is a PAT
if (table_id!=0x00) {
if (verbose) printf("- WRONG Table ID 0x%02X in section, PSI-type=%i!\n",table_id,PSI);
if (useCRC) return 0x0304;
}
if (!section_syntax_indicator || private_indicator) {
if (verbose) printf("- SYNTAX error in section, PSI-type=%i!\n",PSI);
if (useCRC) return 0x0404;
}
next_PAT->table_id=table_id;
next_PAT->section_syntax_indicator=section_syntax_indicator;
next_PAT->private_indicator=private_indicator;
next_PAT->section_length=section_length;
next_PAT->transport_stream_id=PSI_word;
next_PAT->version_number=version_number;
next_PAT->current_next_indicator=current_next_indicator;
next_PAT->section_number=section_number;
next_PAT->last_section_number=last_section_number;
i=8;
while (i+4<section_length) {
ch=ES->Payload[i++]; // you'll never know the evaluation order...
next_PAT->program_number[next_PAT->program_count]=((ch << 8) | (ES->Payload[i++] & 0xFF)) & 0xFFFF;
ch=ES->Payload[i++];
next_PAT->PID[next_PAT->program_count++]=((ch << 8) | (ES->Payload[i++] & 0xFF)) & 0x1FFF;
}
if (verbose) print_PAT(next_PAT);
if (current_next_indicator && (section_number==last_section_number)) { // our new PAT has completely arrived
PAT=next_PAT;
next_PAT=current_PAT;
current_PAT=PAT;
next_PAT->program_count=0;
}
} else if (PSI==2) { // CAT
//if (verbose) printf("- Conditional Access Table -\n\n");
if (table_id!=0x01) {
if (verbose) printf("- WRONG Table ID 0x%02X in section, PSI-type=%i!\n",table_id,PSI);
if (useCRC) return 0x0304;
}
if (!section_syntax_indicator || private_indicator) {
if (verbose) printf("- SYNTAX error in section, PSI-type=%i!\n",PSI);
if (useCRC) return 0x0404;
}
next_CAT->table_id=table_id;
next_CAT->section_syntax_indicator=section_syntax_indicator;
next_CAT->private_indicator=private_indicator;
next_CAT->section_length=section_length;
next_CAT->version_number=version_number;
next_CAT->current_next_indicator=current_next_indicator;
next_CAT->section_number=section_number;
next_CAT->last_section_number=last_section_number;
i=8;
while ((i+2<=section_length) && (next_CAT->descriptor_count<256)) {
n=next_CAT->descriptor_count;
if (next_CAT->CA_descriptor[n]==NULL) {
next_CAT->CA_descriptor[n]=(ConditionalAccessDescriptor *)malloc(sizeof(ConditionalAccessDescriptor));
next_CAT->CA_descriptor[n]->descriptor=NULL;
}
desc_tag=ES->Payload[i++];
desc_length=ES->Payload[i++] & 0xFF;
if (next_CAT->CA_descriptor[n]==NULL) {
next_CAT->CA_descriptor[n]->descriptor=(Descriptor *)malloc(sizeof(Descriptor));
next_CAT->CA_descriptor[n]->descriptor->data=NULL;
}
next_CAT->CA_descriptor[n]->descriptor->tag=desc_tag;
next_CAT->CA_descriptor[n]->descriptor->length=desc_length;
if (desc_length>0) {
if (i+desc_length>n) {
if (verbose) printf("ERROR: insufficent data in descriptor\n");
if (useCRC) return 0x0704;
}
next_CAT->CA_descriptor[n]->descriptor->data=(unsigned char *)realloc(next_CAT->CA_descriptor[n]->descriptor->data,desc_length*sizeof(unsigned char));
for (j=0; j<desc_length; j++) {
next_CAT->CA_descriptor[n]->descriptor->data[j]=ES->Payload[i++];
}
if (desc_length>=2) next_CAT->CA_descriptor[n]->CA_system_ID=((next_CAT->CA_descriptor[n]->descriptor->data[0] << 8) | (next_CAT->CA_descriptor[n]->descriptor->data[1] & 0xFF)) & 0xFFFF;
else next_CAT->CA_descriptor[n]->CA_system_ID=0;
if (desc_length>=4) next_CAT->CA_descriptor[n]->CA_PID=((next_CAT->CA_descriptor[n]->descriptor->data[2] << 8) | (next_CAT->CA_descriptor[n]->descriptor->data[3] & 0xFF)) & 0x1FFF;
else next_CAT->CA_descriptor[n]->CA_PID=0x1FFF;
}
next_CAT->descriptor_count++;
}
/*
while (i+4<section_length) {
next_CAT->descriptor[next_CAT->descriptor_count].descriptor_tag=ES->Payload[i++];
next_CAT->descriptor[next_CAT->descriptor_count].descriptor_length=ES->Payload[i++];
ch=ES->Payload[i++];
next_CAT->descriptor[next_CAT->descriptor_count].CA_system_ID=((ch << 8) | (ES->Payload[i++] & 0xFF)) & 0xFFFF;
ch=ES->Payload[i++];
next_CAT->descriptor[next_CAT->descriptor_count].CA_PID=((ch << 8) | (ES->Payload[i++] & 0xFF)) & 0x1FFF;
next_CAT->descriptor[next_CAT->descriptor_count].descriptor_tag=ES->Payload[i++];
n=next_CAT->descriptor[next_CAT->descriptor_count].descriptor_length;
if (n>4) {
next_CAT->descriptor[next_CAT->descriptor_count].private_data_length=n-4;
next_CAT->descriptor[next_CAT->descriptor_count].private_data_byte=(char *)malloc(n-4);
for (j=0; j<n-4; j++)
next_CAT->descriptor[next_CAT->descriptor_count].private_data_byte[j]=ES->Payload[i++];
} else next_CAT->descriptor[next_CAT->descriptor_count].private_data_length=0;
next_CAT->descriptor_count++;
}
*/
if (verbose) print_CAT(next_CAT);
if (current_next_indicator && (section_number==last_section_number)) { // our new CAT has completely arrived
CAT=next_CAT;
next_CAT=current_CAT;
current_CAT=CAT;
next_CAT->descriptor_count=0;
}
} else if (PSI==3) { // PMT
if (table_id!=0x02) {
if (verbose) printf("- WRONG Table ID 0x%02X in section, PSI-type=%i!\n",table_id,PSI);
if (useCRC) return 0x0304;
}
if (!section_syntax_indicator || private_indicator) {
if (verbose) printf("- SYNTAX error in section, PSI-type=%i!\n",PSI);
if (useCRC) return 0x0404;
}
PMT=new_PMT(&first_nextPMT,PSI_word);
if (PMT==NULL) return 0x0503;
PMT->table_id=table_id;
PMT->section_syntax_indicator=section_syntax_indicator;
PMT->private_indicator=private_indicator;
PMT->section_length=section_length;
PMT->program_number=PSI_word;
PMT->version_number=version_number;
PMT->current_next_indicator=current_next_indicator;
PMT->section_number=section_number;
PMT->last_section_number=last_section_number;
PMT->PCR_PID=((ES->Payload[8] << 8) | (ES->Payload[9] & 0xFF)) & 0x1FFF;
program_info_length=((ES->Payload[10] << 8) | (ES->Payload[11] & 0xFF)) & 0x0FFF;
i=12; n=i+program_info_length;
while ((i+2<=n) && (PMT->descriptor_count<16)) {
desc_tag=ES->Payload[i++];
desc_length=ES->Payload[i++] & 0xFF;
if (PMT->descriptor[PMT->descriptor_count]==NULL) {
PMT->descriptor[PMT->descriptor_count]=(Descriptor *)malloc(sizeof(Descriptor));
PMT->descriptor[PMT->descriptor_count]->data=NULL;
}
PMT->descriptor[PMT->descriptor_count]->tag=desc_tag;
PMT->descriptor[PMT->descriptor_count]->length=desc_length;
if (desc_length>0) {
if (i+desc_length>n) {
if (verbose) printf("ERROR: insufficent data in descriptor %i+%i>=%i\n",i,desc_length,n);
if (useCRC) return 0x0604;
}
PMT->descriptor[PMT->descriptor_count]->data=(unsigned char *)realloc(PMT->descriptor[PMT->descriptor_count]->data,desc_length*sizeof(unsigned char));
for (j=0; j<desc_length; j++) {
PMT->descriptor[PMT->descriptor_count]->data[j]=ES->Payload[i++];
}
}
PMT->descriptor_count++;
}
i=n;
while ((i+4<section_length) && (PMT->program_count<256)) {
prog=PMT->program[PMT->program_count];
if (prog==NULL) {
prog=(Program *)malloc(sizeof(Program));
PMT->program[PMT->program_count]=prog;
prog->descriptor_count=0;
for (j=0; j<16; j++) prog->descriptor[j]=NULL;
}
prog->stream_type=ES->Payload[i++];
ch=ES->Payload[i++]; // you'll never know the evaluation order...
prog->elementary_PID=((ch << 8) | (ES->Payload[i++] & 0xFF)) & 0x1FFF;
ch=ES->Payload[i++];
ES_info_length=((ch << 8) | (ES->Payload[i++] & 0xFF)) & 0x0FFF;
n=i+ES_info_length;
while ((i+2<=n) && (prog->descriptor_count<16)) {
desc_tag=ES->Payload[i++];
desc_length=ES->Payload[i++] & 0xFF;
if (prog->descriptor[prog->descriptor_count]==NULL) {
prog->descriptor[prog->descriptor_count]=(Descriptor *)malloc(sizeof(Descriptor));
prog->descriptor[prog->descriptor_count]->data=NULL;
}
prog->descriptor[prog->descriptor_count]->tag=desc_tag;
prog->descriptor[prog->descriptor_count]->length=desc_length;
if (desc_length>0) {
if (i+desc_length>n) {
if (verbose) printf("ERROR: insufficent data in descriptor %i+%i>=%i\n",i,desc_length,n);
if (useCRC) return 0x0704;
}
prog->descriptor[prog->descriptor_count]->data=(unsigned char *)realloc(prog->descriptor[prog->descriptor_count]->data,desc_length*sizeof(unsigned char));
for (j=0; j<desc_length; j++) {
prog->descriptor[prog->descriptor_count]->data[j]=ES->Payload[i++];
}
}
prog->descriptor_count++;
}
PMT->program_count++;
i=n;
}
if (verbose) print_PMT(PMT);
if (current_next_indicator && (section_number==last_section_number)) { // our new PMT has completely arrived
kill_PMT(&first_PMT,PMT->program_number); // kill outdated PMT
ptr=first_PMT; // move PMT from "next" to "current" list
if (first_PMT==NULL) {
first_PMT=PMT;
} else {
ptr=first_PMT;
while (ptr->next!=NULL) ptr=(ProgramMapTable *)ptr->next;
ptr->next=PMT;
}
if (first_nextPMT==PMT) {
first_nextPMT=PMT->next;
} else {
ptr=first_nextPMT;
while (ptr!=NULL) {
if ((ptr->next==PMT)) {
ptr->next=PMT->next;
}
ptr=(ProgramMapTable *)ptr->next;
}
}
PMT->next=NULL;
}
} else if (PSI==4) { // NIT
if ((table_id<0x40) || (table_id>0xFE)) {
if (verbose) printf("- WRONG Table ID 0x%02X in section, PSI-type=%i!\n",table_id,PSI);
if (useCRC) return 0x0304;
}
if (!private_indicator) {
if (verbose) printf("- SYNTAX error in section, PSI-type=%i!\n",PSI);
if (useCRC) return 0x0404;
}
if (verbose) printf("- Network Information Table -\n\n");
} else if (verbose) printf("- Internal error, Unknown PSI-id 0x%02X, table_id 0x%02X.\n",PSI,table_id);
return 0;
}
// -------------------------------------------------------------- //
// Parsing the TS-packet and calling parse_PSI
// or copy PES to stdout, if neccessary.
// parse_TP is analyzing one Transport Stream Packet at a time,
// then the payload gets either sent to the parse_PSI function
// or, if it's a PES, is piped to stdout.
// -------------------------------------------------------------- //
int parse_TP(
FILE* inputstream, // mpeg-2 file
int parse, // true: parse false: skip packet
int verbose, // true: debug output
int pipe, // true: selected PES as binary false: as Hexdump
unsigned int select_program, // number of the program to pipe out
unsigned int select_stream, // number of the stream in the PMT
int useCRC) { // true: ignore CRC of PSI
// Return codes:
// 0x0000: OK
// 0xXXEE: XX: error location EE: error type
// 0x0001: unexpected end of file
// 0x0002: unexpected end of data
// 0x0003: unexpected end of memory
// bool evals to true if not 0
unsigned char TP[TS_packet_length]; // one Transport Packet, raw
ElementaryStream *ES; // current ES
TransportStreamProgram *TSP; // current TSP
unsigned int PID, // Packet IDentification (13 bits)
pointer_field; // Pointer Field (1 byte, used in PSI-packets)
AdaptionField *AF; // current Adaption Field
unsigned int AFL; // Adaption Field Length
int PSI,
partlen;
unsigned char table_id; // Table ID
unsigned int section_length; // Section Length
ProgramMapTable *PMT; // current PMT
Program *prog; // temp. pointer
unsigned int PESprog; // Elementary Stream Program Number
unsigned char PEStype; // Elementary Stream Media Type
unsigned int PESstream; // Elementary Stream PMT-number
int n,i,j,k; // counters
unsigned char ch; // single byte
int filechar;
if (!parse) verbose=0; // skipping
// scanning up to 1000 chars for the sync-character 0x47
k=1000; i=0;
while (((filechar=fgetc(inputstream))!=0x47) && (filechar>=0) && (k--)) {
if (verbose) {
printf("%02X ",filechar & 0xFF); // looking for sync byte
if ((i++ % 24) == 23) printf("\n");
}
}
if (k) {
if ((verbose) && (k<1000)) printf("\nSkipped %i byte looking for 0x47\n",1000-k);
if (filechar<0) return 0x0001;
TP[0]=filechar;
// reading the remaining 187 bytes of the 188 byte TP-Packet
if (fread(&TP[1],1,TS_packet_length-1,inputstream)!=TS_packet_length-1) return 0x0101;
//if (!parse) return 0; // skipping
// finding/creating our TSP-structure for this PID
PID=((TP[1] & 0x1F) << 8) | (TP[2] & 0xFF);
ES=new_ES(PID);
if (ES==NULL) return 0x0003; // Insufficient Memory;
TSP=ES->TSP;
if (TSP==NULL) return 0x0103; // Insufficient Memory;
// parsing header parameters into TSP-structure
TSP->transport_error_indicator= TP[1] & 0x80;
TSP->payload_unit_start_indicator= TP[1] & 0x40;
TSP->transport_priority= TP[1] & 0x20;
//TSP->PID=((TP[1] & 0x1F) << 8) | (TP[2] & 0xFF); // is already done
TSP->transport_scrambling_control=(TP[3] >> 6) & 0x03;
TSP->adaption_field_control_1= TP[3] & 0x20;
TSP->adaption_field_control_0= TP[3] & 0x10;
TSP->previous_cc=TSP->continuity_counter;
TSP->continuity_counter= TP[3] & 0x0F;
// debugging output
if (verbose) print_TP(TSP);
if (TSP->transport_error_indicator) {
if (verbose) printf("- Broken packet (transport_error_indicator)%s",(useCRC?", skipping...\n":""));
if (useCRC) return 0;
}
if (PID==0x1FFF) { // Null packet
if (verbose) printf("- Null packet - %i byte\n\n",TS_packet_length-4);
ES->payload_count=0;
if (TSP->transport_scrambling_control)
if (verbose) printf("- ERROR in transport_scrambling_control of null packet\n");
if (!TSP->adaption_field_control_0 || TSP->adaption_field_control_1)
if (verbose) printf("- ERROR in adaption_field_control of null packet\n");
return 0;
}
if (!(TSP->adaption_field_control_1 && (TP[5] & 0x80))) { // AF discontinuity_indicator?
if (TSP->adaption_field_control_0 && (TSP->continuity_counter==TSP->previous_cc)) {
if (verbose) printf("- Duplicate Packet - skipping...\n");
return 0;
}
if (TSP->adaption_field_control_0 && (TSP->continuity_counter!=((TSP->previous_cc+1)&0x0F))) {
if (verbose) printf("ERROR: Missing Packet(s): %i\n",(TSP->continuity_counter-TSP->previous_cc)&0x0F);
}
}
// parsing Adaption Field, if any, and storing it into our TSP
if (TSP->adaption_field_control_1) { // Adaption Field present
AFL=TP[4] & 0xFF;
TSP->AF=(AdaptionField *)malloc(sizeof(AdaptionField));
if ((AF=TSP->AF)==NULL) return 0x0203;
if (AFL) {
AF->discontinuity_indicator=TP[5] & 0x80;
AF->random_access_indicator=TP[5] & 0x40;
AF->elementary_stream_priority_indicator=TP[5] & 0x20;
AF->PCR_flag=TP[5] & 0x10;
AF->OPCR_flag=TP[5] & 0x08;
AF->splicing_point_flag=TP[5] & 0x04;
AF->transport_private_data_flag=TP[5] & 0x02;
AF->adaption_field_extension_flag=TP[5] & 0x01;
n=6; // from here on we don't have static positions anymore
if (AF->PCR_flag && ((n+6) <= (AFL+5))) {
AF->program_clock_reference_base=TP[n++] & 0x000000FFULL; // Bit 32-25
AF->program_clock_reference_base=(AF->program_clock_reference_base << 8) | (TP[n++] & 0x000000FFULL); // Bit 24-17
AF->program_clock_reference_base=(AF->program_clock_reference_base << 8) | (TP[n++] & 0x000000FFULL); // Bit 16-9
AF->program_clock_reference_base=(AF->program_clock_reference_base << 8) | (TP[n++] & 0x000000FFULL); // Bit 8-1
ch=TP[n++];
AF->program_clock_reference_base=(AF->program_clock_reference_base << 1) | ((ch >> 7) & 0x00000001ULL); // Bit 0
AF->program_clock_reference_extension=ch & 0x01;
AF->program_clock_reference_extension=(AF->program_clock_reference_extension << 8) | (TP[n++] & 0xFF);
} else if (AF->PCR_flag) return 0x0102;
if (AF->OPCR_flag && ((n+6) <= (AFL+5))) {
AF->original_program_clock_reference_base=TP[n++] & 0x000000FFULL; // Bit 32-25
AF->original_program_clock_reference_base=(AF->original_program_clock_reference_base << 8) | (TP[n++] & 0x000000FFULL); // Bit 24-17
AF->original_program_clock_reference_base=(AF->original_program_clock_reference_base << 8) | (TP[n++] & 0x000000FFULL); // Bit 16-9
AF->original_program_clock_reference_base=(AF->original_program_clock_reference_base << 8) | (TP[n++] & 0x000000FFULL); // Bit 8-1
ch=TP[n++];
AF->original_program_clock_reference_base=(AF->original_program_clock_reference_base << 1) | ((ch >> 7) & 0x00000001ULL); // Bit 0
AF->original_program_clock_reference_extension=ch & 0x01;
AF->original_program_clock_reference_extension=(AF->original_program_clock_reference_extension << 8) | (TP[n++] & 0xFF);
} else if (AF->OPCR_flag) return 0x0202;
if (AF->splicing_point_flag && (n < (AFL+5))) {
AF->splice_countdown=TP[n++] & 0xFF;
} else if (AF->splicing_point_flag) return 0x0302;
if (AF->transport_private_data_flag && (n < (AFL+5))) {
AF->transport_private_data_length=TP[n++] & 0xFF;
if (n+AF->transport_private_data_length > AFL) return 0x0402;
for (i=0; (i<AF->transport_private_data_length) && (n<AFL); i++) {
AF->private_data_byte[i]=TP[n++];
}
} else if (AF->transport_private_data_flag) return 0x0502;
if (AF->adaption_field_extension_flag && (n < (AFL+5))) {
AF->adaption_field_extension_length=TP[n++] & 0xFF;
if (n+AF->adaption_field_extension_length > (AFL+5)) return 0x0602;
ch=TP[n++];
AF->ltw_flag=ch & 0x80;
AF->piecewise_rate_flag=ch & 0x40;
AF->seamless_splice_flag=ch & 0x20;
if (AF->ltw_flag) {
ch=TP[n++];
AF->ltw_valid_flag=ch & 0x80;
AF->ltw_offset=((ch & 0x7F) << 8) | (TP[n++] & 0xFF);
}
if (AF->piecewise_rate_flag) {
AF->piecewise_rate=TP[n++] & 0x3F;
AF->piecewise_rate=(AF->piecewise_rate << 8) | (TP[n++] & 0xFF);
AF->piecewise_rate=(AF->piecewise_rate << 8) | (TP[n++] & 0xFF);
}
if (AF->seamless_splice_flag) {
ch=TP[n++];
AF->splice_type=(ch >> 4) & 0x0F;
AF->DTS_next_AU=(ch >> 1) & 0x07ULL; // Bit 32-30
AF->DTS_next_AU=(AF->DTS_next_AU << 8) | (TP[n++] & 0xFFULL); // Bit 29-22
AF->DTS_next_AU=(AF->DTS_next_AU << 7) | ((TP[n++] >> 1) & 0x7FULL); // Bit 21-15
AF->DTS_next_AU=(AF->DTS_next_AU << 8) | (TP[n++] & 0xFFULL); // Bit 14-7
AF->DTS_next_AU=(AF->DTS_next_AU << 7) | ((TP[n++] >> 1) & 0x7FULL); // Bit 6-0
}
} else if (AF->adaption_field_extension_flag) return 0x0702;
// debugging output
if (verbose) {
//printf("Adaption Field Length: %i bytes\n",AFL);
//for (i=0; i<AFL; i++) {
// printf("%02X ",(TP[i+5] & 0xFF));
// if (((i % 24)==23) || (i == AFL-1)) printf("\n");
//}
print_AF(AF);
}
}
AFL++; // AFL includes now the AFL-byte itself
} else AFL=0;
if (TSP->adaption_field_control_0) { // Payload present
n=AFL+4; // offset of Payload in TP[]
// determine payload type: PES or PSI?
// PSI-type: 0:PES 1:PAT 2:CAT 3:PMT 4:NIT 5:Null -1:Unknown
if (PID==0x0000) PSI=1; // is the PSI a PAT?
else if (PID==0x0001) PSI=2; // is the PSI a CAT?
else if (PID==0x1FFF) PSI=-2; // Null Packet? Already sorted out, but anyhow...
else {
PSI=-1; // default to Unknown
if (PAT!=NULL) {
for (i=0; i<PAT->program_count; i++) { // unless the PID is in the current PAT
if (PID==PAT->PID[i])
PSI=((PAT->program_number[i])?3:4); // Program Number 0 means NIT, otherwise PMT
}
}
if (CAT!=NULL) {
for (i=0; i<CAT->descriptor_count; i++) { // PES-PID can be in CAT, too. (ECM and EMM)
if (PID==CAT->CA_descriptor[i]->CA_PID) {
PSI=0; // ECM or EMM, has to go to the PES-decoder
PESprog=0; // Program Number
PEStype=0; // Stream Media Type
PESstream=0;
}
}
}
PMT=first_PMT;
while (PMT!=NULL) { // check all current PMT's
for (i=0; i<PMT->program_count; i++) { // or the PID is in the current PMT, then it's a PES
if (PID==PMT->program[i]->elementary_PID) {
PSI=0; // it's a PES
PESprog=PMT->program_number; // Program Number
PEStype=PMT->program[i]->stream_type; // Stream Media Type
PESstream=i+1;
}
}
PMT=(ProgramMapTable *)PMT->next;
}
}
if (PSI<0) { // unknown PSI, let's see if we already guessed the PID
if (phantom_PMT!=NULL) {
for (i=0; i<phantom_PMT->program_count; i++) { // or the PID is in the current PMT, then it's a PES
if (PID==phantom_PMT->program[i]->elementary_PID) {
PSI=0; // it's a PES
PESprog=phantom_PMT->program_number; // Program Number
PEStype=phantom_PMT->program[i]->stream_type; // Stream Media Type
PESstream=i+1;
if (verbose) printf(" previous GUESS: PES # %i, type 0x%02X\n",PESstream,PEStype);
}
}
}
}
if (PSI<0) { // unknown PSI, let's try to guess what it might be
if (TSP->payload_unit_start_indicator) { // a new payload block, only here we have a chance
if ((!TP[n]) && (!TP[n+1]) && (TP[n+2]=0x01)) {
PSI=0; // Packet start code prefix, it's a PES
PESprog=0xFFFF; // Program Number
PEStype=0xFF; // Stream Media Type
PESstream=0;
if ((TP[n+3] & 0xF0) == 0xE0) {
PEStype=0x02; // MPEG-2 Video
} else if ((TP[n+3] & 0xE0) == 0xC0) {
PEStype=0x04; // MPEG-2 Audio
}
if (phantom_PMT!=NULL) {
prog=phantom_PMT->program[phantom_PMT->program_count];
if (prog==NULL) {
prog=(Program *)malloc(sizeof(Program));
phantom_PMT->program[phantom_PMT->program_count]=prog;
prog->descriptor_count=0;
for (j=0; j<16; j++) prog->descriptor[j]=NULL;
}
prog->elementary_PID=PID;
prog->stream_type=PEStype;
phantom_PMT->program_count++;
PESstream=phantom_PMT->program_count;
}
if (verbose) printf(" GUESS: PES # %i, type 0x%02X\n",PESstream,PEStype);
} else {
pointer_field=TP[n];
if (n+pointer_field+1<TS_packet_length) {
table_id=TP[n+pointer_field+1];
if (table_id==0x02) PSI=3; // might be a PMT
else if (table_id==0xFF) PSI=5; // might be a Null PSI
else if (table_id>=0x40) PSI=4; // might be a NIT
if (verbose && (PSI>0)) printf(" GUESS: PSI, %s, table_id 0x%02X\n",((PSI==3)?"PMT":((PSI==4)?"NIT":"Null PSI")),table_id);
}
}
}
}