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/*
* Simple MPEG/DVB parser to achieve network/service information without initial tuning data
*
* Copyright (C) 2006, 2007, 2008, 2009 Winfried Koehler
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*
* The author can be reached at: w_scan AT gmx-topmail DOT de
*
* The project's page is w_scan AT gmx-topmail DOT de
*/
/******************************************************************************
* reading dvbscan initial_tuning_data.
*
* NOTE: READBACK IS *ONLY* GUARANTEED IF FILES ARE GENERATED BY w_scan AND
* NOT MODIFIED. WORKING WITHOUT INIT TRANSPONDER FILES IS MAIN PHILOSOPHY.
*
* readback not tested yet. - added wk 20090303 -
*****************************************************************************/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include "extended_frontend.h"
#include "scan.h"
#include "parse-dvbscan.h"
#include "dvbscan.h"
#include "satellites.h"
#include "dump-vdr.h"
#define MAX_LINE_LENGTH 1024 // paranoia, but still possible
#define DELIMITERS " \r\n\t"
enum __dvbscan_args {
sat_frequency,
sat_polarization,
sat_symbol_rate,
sat_fec_inner,
sat_rolloff, // optional
sat_modulation, // optional
sat_END_READING,
cable_frequency,
cable_symbol_rate,
cable_fec_inner,
cable_modulation,
cable_END_READING,
terr_plp_id,
terr_system_id,
terr_frequency,
terr_bandwidth,
terr_fec_high_priority,
terr_fec_low_priority,
terr_modulation,
terr_transmission_mode,
terr_guard_interval,
terr_hierarchy,
terr_END_READING,
atsc_frequency,
atsc_modulation,
atsc_END_READING,
end_of_line,
STOP,
};
enum __extflags {
ignore,
wscan_version,
tuning_timeout,
filter_timeout,
fe_type,
list_idx
};
void parse_w_scan_flags(const char * input_buffer, struct w_scan_flags * flags) {
char *copy = (char *) malloc(strlen(input_buffer) + 1);
char *token = strtok(copy, DELIMITERS);
enum __extflags arg = ignore;
strcpy(copy, input_buffer);
if (NULL == token) {
free(copy);
return;
}
while (NULL != (token = strtok(0, DELIMITERS))) {
if (0 == strcasecmp(token, "<w_scan>")) {
arg = wscan_version;
continue;
}
if (0 == strcasecmp(token, "</w_scan>")) {
arg = ignore;
continue;
}
switch(arg++) {
case wscan_version:
flags->version = strtoul(token, NULL, 10);
break;
case tuning_timeout:
flags->tuning_timeout = strtoul(token, NULL, 10);
break;
case filter_timeout:
flags->filter_timeout = strtoul(token, NULL, 10);
break;
case fe_type:
flags->scantype = txt_to_scantype(token);
break;
case list_idx:
flags->list_id = strtoul(token, NULL, 10);
break;
case ignore:
default:
continue;
}
}
free(copy);
}
int dvbscan_parse_tuningdata(const char * tuningdata, struct w_scan_flags * flags) {
FILE * initdata = NULL;
char * buf = (char *) calloc(sizeof(char), MAX_LINE_LENGTH);
enum __dvbscan_args arg;
struct transponder * tn;
int count = 0;
if (tuningdata == NULL) {
free(buf);
error("could not open initial tuning data: file name is NULL\n");
return 0; // err
}
info("parsing initial tuning data \"%s\"..\n", tuningdata);
initdata = fopen(tuningdata, "r");
if (initdata == NULL) {
free(buf);
error("cannot open '%s': error %d %s\n", tuningdata, errno, strerror(errno));
return 0; // err
}
while (fgets(buf, MAX_LINE_LENGTH, initdata) != NULL) {
char * copy = (char *) calloc(sizeof(char), strlen(buf) + 1);
char * token;
if (copy == NULL) {
fatal("Could not allocate memory.\n");
}
memset(&tn, 0, sizeof(tn));
/* strtok will modify it's first argument, but working
* on a copy is safe. Be really careful here -
* 'copy' should NOT be referred to after usage of strtok()
* -wk-
*/
strcpy(copy, buf);
token = strtok(copy, DELIMITERS);
if (NULL == token)
continue;
switch (toupper(token[0])) {
case 'A':
tn = alloc_transponder(0, SYS_ATSC, 0);
tn->type = SCAN_TERRCABLE_ATSC;
break;
case 'C':
tn = alloc_transponder(0, SYS_DVBC_ANNEX_AC, 0);
tn->type = SCAN_CABLE;
break;
case 'S':
tn = alloc_transponder(0, SYS_DVBS, 0);
tn->type = SCAN_SATELLITE;
break;
case 'T':
tn = alloc_transponder(0, SYS_DVBT, 0);
tn->type = SCAN_TERRESTRIAL;
break;
case '#':
if (strlen(token) > 2)
switch (token[1]) {
case '!':
parse_w_scan_flags(buf, flags);
continue;
default:;
}
continue;
default:
free(buf);
error("could not parse %s\n", tuningdata);
return 0; // err
}
flags->scantype = tn->type;
switch (tn->type) {
case SCAN_SATELLITE:
tn->delsys = SYS_DVBS;
if (strlen(token) >= 2)
if (token[1] == '2') {
flags->need_2g_fe = 1;
tn->delsys = SYS_DVBS2;
}
arg = sat_frequency;
tn->inversion = INVERSION_AUTO;
tn->coderate = FEC_AUTO;
tn->pilot = PILOT_AUTO;
tn->modulation = QPSK;
tn->rolloff = ROLLOFF_35;
break;
case SCAN_CABLE:
tn->delsys = SYS_DVBC_ANNEX_AC;
if (strlen(token) >= 2)
if (token[1] == '2') {
flags->need_2g_fe = 1;
}
arg = cable_frequency;
tn->inversion = INVERSION_AUTO;
tn->modulation = QAM_AUTO;
tn->symbolrate = 6900000;
tn->coderate = FEC_NONE;
break;
case SCAN_TERRESTRIAL:
tn->delsys = SYS_DVBT;
arg = terr_frequency;
if (strlen(token) >= 2)
if (token[1] == '2') {
flags->need_2g_fe = 1;
tn->delsys = SYS_DVBT2;
arg = terr_plp_id;
}
tn->inversion = INVERSION_AUTO;
tn->bandwidth = 8000000;
tn->coderate = FEC_AUTO;
tn->coderate_LP = FEC_NONE;
tn->modulation = QAM_AUTO;
tn->transmission = TRANSMISSION_MODE_AUTO;
tn->guard = GUARD_INTERVAL_AUTO;
tn->hierarchy = HIERARCHY_AUTO;
break;
case SCAN_TERRCABLE_ATSC:
tn->delsys = SYS_ATSC;
if (strlen(token) >= 2)
if (token[1] == '2') {
flags->need_2g_fe = 1;
}
arg = atsc_frequency;
tn->inversion = INVERSION_AUTO;
tn->modulation = VSB_8;
break;
default:
free(buf);
error("could not parse '%s' - undefined fe_type\n", buf);
return 0; // err
}
while (NULL != (token = strtok(0, DELIMITERS))) {
switch (arg++) {
case sat_frequency:
case cable_frequency:
case terr_frequency:
case atsc_frequency:
tn->frequency = strtoul(token, NULL, 10);
break;
case sat_polarization:
tn->polarization = txt_to_sat_pol(token);
break;
case sat_symbol_rate:
tn->symbolrate = strtoul(token, NULL, 10);
break;
case sat_fec_inner:
tn->coderate = txt_to_sat_fec(token);
count++;
break;
case sat_rolloff:
tn->rolloff = txt_to_sat_rolloff(token);
break;
case sat_modulation:
tn->modulation = txt_to_sat_mod(token);
break;
case cable_symbol_rate:
tn->symbolrate = strtoul(token, NULL, 0);
break;
case cable_fec_inner:
tn->coderate = txt_to_cable_fec(token);
break;
case cable_modulation:
tn->modulation = txt_to_cable_mod(token);
count++;
break;
case terr_plp_id:
tn->plp_id = strtoul(token, NULL, 10);
break;
case terr_system_id:
tn->system_id = strtoul(token, NULL, 10);
break;
case terr_bandwidth:
tn->bandwidth = txt_to_terr_bw(token);
break;
case terr_fec_high_priority:
tn->coderate = txt_to_terr_fec(token);
break;
case terr_fec_low_priority:
tn->coderate_LP = txt_to_terr_fec(token);
break;
case terr_modulation:
tn->modulation = txt_to_terr_mod(token);
break;
case terr_transmission_mode:
tn->transmission = txt_to_terr_transmission(token);
break;
case terr_guard_interval:
tn->guard = txt_to_terr_guard(token);
break;
case terr_hierarchy:
tn->hierarchy = txt_to_terr_hierarchy(token);
count++;
break;
case atsc_modulation:
tn->modulation = txt_to_atsc_mod(token);
count++;
break;
case cable_END_READING:
case sat_END_READING:
case terr_END_READING:
case atsc_END_READING:
case end_of_line:
case STOP:
default:
arg = end_of_line;
break;
}
if ((arg == STOP) || (arg == end_of_line))
break;
}
free(copy);
copy = NULL;
memset(buf, 0, sizeof(char) * MAX_LINE_LENGTH);
print_transponder(buf, tn);
info("\ttransponder %s\n", buf);
memset(buf, 0, sizeof(char) * MAX_LINE_LENGTH);
}
free(buf);
fclose(initdata);
if (count == 0) {
info("Unexpected end of file..\n");
return 0;
}
return 1; // success
}
/*****************************************************************************/
/******************************************************************************
* reading rotor configuration.
*
* NOTE: READING IS *ONLY* GUARANTEED IF FILES ARE USING FILE FORMAT AS
* DESCRIBED IN doc/README.file_formats
*
* NOTE: VDR plugin 'rotor' rotor.conf file format is inofficially supported
* too, but reading is not guaranteed. So don't bother me is some files in this
* file format are not accepted. wk 20090501 -
*****************************************************************************/
enum __rotor_args {
rotor_position,
sat_id,
end_of_line_rotor,
READ_STOP,
plug_rotor_sat_id,
plug_rotor_rotor_position,
plug_rotor_eol,
};
enum __rotor_file_formats {
rotor_fileformat_undef,
rotor_fileformat_wscan,
rotor_fileformat_vdrpluginrotor
};
struct pos_item {
int position;
char * id;
};
#define ROTOR_DELIMITERS " \t=\r\n"
/*
* needs to be kept in sync with vdr's source enum (sat only)
*/
enum vdr_source_types {
stNone = 0x0000,
stSat = 0x8000,
st_Mask = 0xC000,
st_Neg = 0x0800,
st_Pos = 0x07FF,
};
/*
* convert a string token to source-id used by vdr (sat only)
*/
int vdr_code_from_token(const char * token) {
int code = -1;
int pos = 0;
int dot = 0;
int neg = 0;
switch (toupper(*token)) {
case 'S':
code = stSat;
break;
default:
fatal("%s: could not parse %s\n",
__FUNCTION__, token);
}
while (*++token) {
switch (toupper(*token)) {
case '0' ... '9':
pos *= 10;
pos += *token - '0';
break;
case '.':
dot++;
break;
case 'E':
neg++; // no break, fall through
case 'W':
if (!dot)
pos *= 10;
break;
default: fatal("%s: unknown source character '%c'",
__FUNCTION__, *token);
}
}
if (neg)
pos |= st_Neg;
code |= pos;
return code;
}
/*
* convert a source-id used by vdr to the matching string used in channels.conf
* (sat only). returned value is copied to buffer.
*/
void vdr_source_to_str(int id, char * buffer, int bufsize) {
char *q = buffer;
switch (id & st_Mask) {
case stSat: *q++ = 'S';
{
int pos = id & ~st_Mask;
if ((pos & ~st_Neg) % 10)
q += snprintf(q, bufsize - 2, "%u.%u",
(pos & ~st_Neg) / 10,
(pos & ~st_Neg) % 10);
else
q += snprintf(q, bufsize - 2, "%u",
(pos & ~st_Neg) / 10);
*q++ = (id & st_Neg) ? 'E' : 'W';
}
break;
default:
*q++ = id + '0';
}
*q = 0;
}
/*
* parse a rotor.conf in w_scans file format.
*
* file format as described in doc/README.file_formats
* # R <position> <satellite id> [# comment]
* R 1 S4E8
* R 7 S19E2
*
* - satellite_id has to match w_scans identifiers, see option -s
* - rotor position 1..255 (positions < 1 are ignored)
* -------------------------------------------------------------
* NOTE: the rotor.conf from vdr 'rotor' plugin is also accepted,
* but not officially supported:
* S4.8E = 1
* S19.2E = 7
* -------------------------------------------------------------
*/
int dvbscan_parse_rotor_positions(const char * positiondata) {
FILE * data = NULL;
char * buf = (char *) calloc(sizeof(char), MAX_LINE_LENGTH);
enum __rotor_args arg = end_of_line_rotor;
//enum __rotor_file_formats fformat = rotor_fileformat_undef;
struct pos_item item = {0, NULL};
int count = 0;
if (positiondata == NULL) {
free(buf);
error("could not open rotor position tuning data: file name is NULL\n");
return 0; // err
}
info("parsing rotor data \"%s\"..\n", positiondata);
data = fopen(positiondata, "r");
if (data == NULL) {
free(buf);
error("cannot open '%s': error %d %s\n", positiondata, errno, strerror(errno));
return 0; // err
}
while (fgets(buf, MAX_LINE_LENGTH, data) != NULL) {
char * copy = (char *) calloc(sizeof(char), strlen(buf) + 1);
char * token;
if (copy == NULL)
fatal("Could not allocate memory.\n");
strcpy(copy, buf);
token = strtok(copy, ROTOR_DELIMITERS);
if (NULL == token)
continue;
switch (toupper(token[0])) {
case 'R':
arg = rotor_position;
//fformat = rotor_fileformat_wscan;
break;
case 'S':
{
char buffer[16];
int code = vdr_code_from_token(token);
vdr_source_to_str(code, buffer, sizeof(buffer));
item.id = (char *) malloc(strlen(vdr_name_to_short_name(buffer))+1);
strcpy(item.id, vdr_name_to_short_name(buffer));
arg = plug_rotor_rotor_position;
//fformat = rotor_fileformat_vdrpluginrotor;
break;
}
case '#':
continue;
default:
error("could not parse %s\n", positiondata);
goto err;
}
while (NULL != (token = strtok(0, DELIMITERS))) {
switch (arg++) {
case rotor_position:
switch (toupper(token[0])) {
case '0' ... '9':
item.position = strtoul(token, NULL, 10);
if (item.position < 1)
continue;
break;
case '-':
item.position = -1;
arg = end_of_line_rotor;
continue;
default:
error("could not parse %s\n", positiondata);
goto err;
}
case sat_id:
if (item.id)
free(item.id);
item.id = (char *) malloc(strlen(token)+1);
strcpy(item.id, token);
break;
case plug_rotor_rotor_position:
if (! strcmp("=", token)) {
// fixme: we hit a "="
arg--;
break;
}
switch (toupper(token[0])) {
case '0' ... '9':
item.position = strtoul(token, NULL, 10);
if (item.position < 1)
continue;
break;
case '-':
item.position = -1;
arg = end_of_line_rotor;
continue;
default:
error("could not parse %s\n", positiondata);
goto err;
}
case end_of_line_rotor:
case READ_STOP:
default:
arg = end_of_line_rotor;
break;
}
if ((arg == READ_STOP) || (arg == end_of_line_rotor))
break;
}
free(copy);
copy = NULL;
if (item.position > 0) {
if (txt_to_satellite(item.id) < 0) {
info("Satellite ID \"%s\" not defined.\n", item.id);
goto err;
}
if (item.position > 255) {
info("Invalid satellite position %d.\n", item.position);
goto err;
}
sat_list[txt_to_satellite(item.id)].rotor_position = item.position;
count++;
info("\trotor position %3d = %6s\n", item.position, item.id);
}
memset(buf, 0, sizeof(char) * MAX_LINE_LENGTH);
}
if (item.id)
free(item.id);
free(buf);
fclose(data);
if (count == 0) {
info("Unexpected end of file..\n");
return 0;
}
return 1; // success
err:
// clean up and leave with error.
info("line causing error was \n\"%s\n", buf);
if (item.id)
free(item.id);
free(buf);
fclose(data);
return 0; //err
}
|
