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Diffstat (limited to 'util/szap/szap.c')
| -rw-r--r-- | util/szap/szap.c | 560 |
1 files changed, 560 insertions, 0 deletions
diff --git a/util/szap/szap.c b/util/szap/szap.c new file mode 100644 index 0000000..581c970 --- /dev/null +++ b/util/szap/szap.c @@ -0,0 +1,560 @@ +/* szap -- simple zapping tool for the Linux DVB API + * + * szap operates on VDR (http://www.cadsoft.de/people/kls/vdr/index.htm) + * satellite channel lists (e.g. from http://www.dxandy.de/cgi-bin/dvbchan.pl). + * szap assumes you have a "Universal LNB" (i.e. with LOFs 9750/10600 MHz). + * + * Compilation: `gcc -Wall -I../../ost/include -O2 szap.c -o szap` + * or, if your DVB driver is in the kernel source tree: + * `gcc -Wall -DDVB_IN_KERNEL -O2 szap.c -o szap` + * + * Copyright (C) 2001 Johannes Stezenbach (js@convergence.de) + * for convergence integrated media + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + + +#include <stdio.h> +#include <stdlib.h> +#include <limits.h> +#include <string.h> +#include <errno.h> +#include <sys/ioctl.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/poll.h> +#include <fcntl.h> +#include <time.h> +#include <unistd.h> + +#include <stdint.h> +#include <sys/time.h> + +#include <linux/dvb/frontend.h> +#include <linux/dvb/dmx.h> +#include "lnb.h" + +#ifndef TRUE +#define TRUE (1==1) +#endif +#ifndef FALSE +#define FALSE (1==0) +#endif + +/* location of channel list file */ +#define CHANNEL_FILE "channels.conf" + +/* one line of the VDR channel file has the following format: + * ^name:frequency_MHz:polarization:sat_no:symbolrate:vpid:apid:?:service_id$ + */ + + +#define FRONTENDDEVICE "/dev/dvb/adapter%d/frontend%d" +#define DEMUXDEVICE "/dev/dvb/adapter%d/demux%d" + +static struct lnb_types_st lnb_type; + +static int exit_after_tuning; +static int interactive; + +static char *usage_str = + "\nusage: szap -q\n" + " list known channels\n" + " szap [options] {-n channel-number|channel_name}\n" + " zap to channel via number or full name (case insensitive)\n" + " -a number : use given adapter (default 0)\n" + " -f number : use given frontend (default 0)\n" + " -d number : use given demux (default 0)\n" + " -c file : read channels list from 'file'\n" + " -x : exit after tuning\n" + " -r : set up /dev/dvb/adapterX/dvr0 for TS recording\n" + " -l lnb-type (DVB-S Only) (use -l help to print types) or \n" + " -l low[,high[,switch]] in Mhz\n" + " -i : run interactively, allowing you to type in channel names\n" + " or -n numbers for zapping\n"; + +static int set_demux(int dmxfd, int pid, int audio, int dvr) +{ + struct dmx_pes_filter_params pesfilter; + + if (pid <= 0 || pid >= 0x1fff) /* ignore this pid to allow radio services */ + return TRUE; + + if (dvr) { + int buffersize = 64 * 1024; + if (ioctl(dmxfd, DMX_SET_BUFFER_SIZE, buffersize) == -1) + perror("DMX_SET_BUFFER_SIZE failed"); + } + + pesfilter.pid = pid; + pesfilter.input = DMX_IN_FRONTEND; + pesfilter.output = dvr ? DMX_OUT_TS_TAP : DMX_OUT_DECODER; + pesfilter.pes_type = audio ? DMX_PES_AUDIO : DMX_PES_VIDEO; + pesfilter.flags = DMX_IMMEDIATE_START; + + if (ioctl(dmxfd, DMX_SET_PES_FILTER, &pesfilter) == -1) { + fprintf(stderr, "DMX_SET_PES_FILTER failed " + "(PID = 0x%04x): %d %m\n", pid, errno); + return FALSE; + } + + return TRUE; +} + + +struct diseqc_cmd { + struct dvb_diseqc_master_cmd cmd; + uint32_t wait; +}; + +void diseqc_send_msg(int fd, fe_sec_voltage_t v, struct diseqc_cmd *cmd, + fe_sec_tone_mode_t t, fe_sec_mini_cmd_t b) +{ + if (ioctl(fd, FE_SET_TONE, SEC_TONE_OFF) == -1) + perror("FE_SET_TONE failed"); + if (ioctl(fd, FE_SET_VOLTAGE, v) == -1) + perror("FE_SET_VOLTAGE failed"); + usleep(15 * 1000); + if (ioctl(fd, FE_DISEQC_SEND_MASTER_CMD, &cmd->cmd) == -1) + perror("FE_DISEQC_SEND_MASTER_CMD failed"); + usleep(cmd->wait * 1000); + usleep(15 * 1000); + if (ioctl(fd, FE_DISEQC_SEND_BURST, b) == -1) + perror("FE_DISEQC_SEND_BURST failed"); + usleep(15 * 1000); + if (ioctl(fd, FE_SET_TONE, t) == -1) + perror("FE_SET_TONE failed"); +} + + + + +/* digital satellite equipment control, + * specification is available from http://www.eutelsat.com/ + */ +static int diseqc(int secfd, int sat_no, int pol_vert, int hi_band) +{ + struct diseqc_cmd cmd = + { {{0xe0, 0x10, 0x38, 0xf0, 0x00, 0x00}, 4}, 0 }; + + /* param: high nibble: reset bits, low nibble set bits, + * bits are: option, position, polarizaion, band + */ + cmd.cmd.msg[3] = + 0xf0 | (((sat_no * 4) & 0x0f) | (hi_band ? 1 : 0) | (pol_vert ? 0 : 2)); + + diseqc_send_msg(secfd, pol_vert ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18, + &cmd, hi_band ? SEC_TONE_ON : SEC_TONE_OFF, + (sat_no / 4) % 2 ? SEC_MINI_B : SEC_MINI_A); + + return TRUE; +} + +static int do_tune(int fefd, unsigned int ifreq, unsigned int sr) +{ + struct dvb_frontend_parameters tuneto; + struct dvb_frontend_event ev; + + /* discard stale QPSK events */ + while (1) { + if (ioctl(fefd, FE_GET_EVENT, &ev) == -1) + break; + } + + tuneto.frequency = ifreq; + tuneto.inversion = INVERSION_AUTO; + tuneto.u.qpsk.symbol_rate = sr; + tuneto.u.qpsk.fec_inner = FEC_AUTO; + + if (ioctl(fefd, FE_SET_FRONTEND, &tuneto) == -1) { + perror("FE_SET_FRONTEND failed"); + return FALSE; + } + + return TRUE; +} + + +static +int check_frontend (int fe_fd, int dvr) +{ + fe_status_t status; + uint16_t snr, signal; + uint32_t ber, uncorrected_blocks; + int timeout = 0; + + do { + if (ioctl(fe_fd, FE_READ_STATUS, &status) == -1) + perror("FE_READ_STATUS failed"); + /* some frontends might not support all these ioctls, thus we + * avoid printing errors */ + if (ioctl(fe_fd, FE_READ_SIGNAL_STRENGTH, &signal) == -1) + signal = -2; + if (ioctl(fe_fd, FE_READ_SNR, &snr) == -1) + snr = -2; + if (ioctl(fe_fd, FE_READ_BER, &ber) == -1) + ber = -2; + if (ioctl(fe_fd, FE_READ_UNCORRECTED_BLOCKS, &uncorrected_blocks) == -1) + uncorrected_blocks = -2; + + printf ("status %02x | signal %04x | snr %04x | ber %08x | unc %08x | ", + status, signal, snr, ber, uncorrected_blocks); + + if (status & FE_HAS_LOCK) + printf("FE_HAS_LOCK"); + printf("\n"); + + if (exit_after_tuning && ((status & FE_HAS_LOCK) || (++timeout >= 10))) + break; + + usleep(1000000); + } while (1); + + return 0; +} + + +static +int zap_to(unsigned int adapter, unsigned int frontend, unsigned int demux, + unsigned int sat_no, unsigned int freq, unsigned int pol, + unsigned int sr, unsigned int vpid, unsigned int apid, int dvr) +{ + char fedev[128], dmxdev[128]; + static int fefd, videofd, audiofd; + uint32_t ifreq; + int hiband, result; + static struct dvb_frontend_info fe_info; + + if (!fefd) { + snprintf(fedev, sizeof(fedev), FRONTENDDEVICE, adapter, frontend); + snprintf(dmxdev, sizeof(dmxdev), DEMUXDEVICE, adapter, demux); + printf("using '%s' and '%s'\n", fedev, dmxdev); + + if ((fefd = open(fedev, O_RDWR | O_NONBLOCK)) < 0) { + perror("opening frontend failed"); + return FALSE; + } + + result = ioctl(fefd, FE_GET_INFO, &fe_info); + + if (result < 0) { + perror("ioctl FE_GET_INFO failed"); + close(fefd); + return FALSE; + } + + if (fe_info.type != FE_QPSK) { + fprintf(stderr, "frontend device is not a QPSK (DVB-S) device!\n"); + close(fefd); + return FALSE; + } + + if ((videofd = open(dmxdev, O_RDWR)) < 0) { + perror("opening video demux failed"); + close(fefd); + return FALSE; + } + + if ((audiofd = open(dmxdev, O_RDWR)) < 0) { + perror("opening audio demux failed"); + close(videofd); + close(fefd); + return FALSE; + } + } + + hiband = 0; + if (lnb_type.switch_val && lnb_type.high_val && + freq >= lnb_type.switch_val) + hiband = 1; + + if (hiband) + ifreq = freq - lnb_type.high_val; + else { + if (freq < lnb_type.low_val) + ifreq = lnb_type.low_val - freq; + else + ifreq = freq - lnb_type.low_val; + } + result = FALSE; + + if (diseqc(fefd, sat_no, pol, hiband)) + if (do_tune(fefd, ifreq, sr)) + if (set_demux(videofd, vpid, 0, dvr)) + if (set_demux(audiofd, apid, 1, dvr)) + result = TRUE; + + check_frontend (fefd, dvr); + + if (!interactive) { + close(audiofd); + close(videofd); + close(fefd); + } + + return result; +} + + +static int read_channels(const char *filename, int list_channels, + uint32_t chan_no, const char *chan_name, + unsigned int adapter, unsigned int frontend, + unsigned int demux, int dvr) +{ + FILE *cfp; + char buf[4096]; + char inp[256]; + char *field, *tmp, *p; + unsigned int line; + unsigned int freq, pol, sat_no, sr, vpid, apid; + int ret; + +again: + line = 0; + if (!(cfp = fopen(filename, "r"))) { + fprintf(stderr, "error opening channel list '%s': %d %m\n", + filename, errno); + return FALSE; + } + + if (interactive) { + fprintf(stderr, "\n>>> "); + if (!fgets(inp, sizeof(inp), stdin)) { + printf("\n"); + return -1; + } + if (inp[0] == '-' && inp[1] == 'n') { + chan_no = strtoul(inp+2, NULL, 0); + chan_name = NULL; + if (!chan_no) { + fprintf(stderr, "bad channel number\n"); + goto again; + } + } else { + p = strchr(inp, '\n'); + if (p) + *p = '\0'; + chan_name = inp; + chan_no = 0; + } + } + + while (!feof(cfp)) { + if (fgets(buf, sizeof(buf), cfp)) { + line++; + + if (chan_no && chan_no != line) + continue; + + tmp = buf; + field = strsep(&tmp, ":"); + + if (!field) + goto syntax_err; + + if (list_channels) { + printf("%03u %s\n", line, field); + continue; + } + + if (chan_name && strcasecmp(chan_name, field) != 0) + continue; + + printf("zapping to %d '%s':\n", line, field); + + if (!(field = strsep(&tmp, ":"))) + goto syntax_err; + + freq = strtoul(field, NULL, 0); + + if (!(field = strsep(&tmp, ":"))) + goto syntax_err; + + pol = (field[0] == 'h' ? 0 : 1); + + if (!(field = strsep(&tmp, ":"))) + goto syntax_err; + + sat_no = strtoul(field, NULL, 0); + + if (!(field = strsep(&tmp, ":"))) + goto syntax_err; + + sr = strtoul(field, NULL, 0) * 1000; + + if (!(field = strsep(&tmp, ":"))) + goto syntax_err; + + vpid = strtoul(field, NULL, 0); + + if (!(field = strsep(&tmp, ":"))) + goto syntax_err; + + apid = strtoul(field, NULL, 0); + + printf("sat %u, frequency = %u MHz %c, symbolrate %u, " + "vpid = 0x%04x, apid = 0x%04x\n", + sat_no, freq, pol ? 'V' : 'H', sr, vpid, apid); + + fclose(cfp); + + ret = zap_to(adapter, frontend, demux, + sat_no, freq * 1000, pol, sr, vpid, apid, dvr); + if (interactive) + goto again; + + if (ret) + return TRUE; + + return FALSE; + + syntax_err: + fprintf(stderr, "syntax error in line %u: '%s'\n", line, buf); + } else if (ferror(cfp)) { + fprintf(stderr, "error reading channel list '%s': %d %m\n", + filename, errno); + fclose(cfp); + return FALSE; + } else + break; + } + + fclose(cfp); + + if (!list_channels) { + fprintf(stderr, "channel not found\n"); + if (!interactive) + return FALSE; + } + if (interactive) + goto again; + + return TRUE; +} + + +void +bad_usage(char *pname, int prlnb) +{ +int i; +struct lnb_types_st *lnbp; +char **cp; + + if (!prlnb) { + fprintf (stderr, usage_str, pname); + } else { + i = 0; + fprintf(stderr, "-l <lnb-type> or -l low[,high[,switch]] in Mhz\nwhere <lnb-type> is:\n"); + while(NULL != (lnbp = lnb_enum(i))) { + fprintf (stderr, "%s\n", lnbp->name); + for (cp = lnbp->desc; *cp ; cp++) { + fprintf (stderr, " %s\n", *cp); + } + i++; + } + } +} + +int main(int argc, char *argv[]) +{ + const char *home; + char chanfile[2 * PATH_MAX]; + int list_channels = 0; + unsigned int chan_no = 0; + const char *chan_name = NULL; + unsigned int adapter = 0, frontend = 0, demux = 0, dvr = 0; + int opt, copt = 0; + + lnb_type = *lnb_enum(0); + while ((opt = getopt(argc, argv, "hqrn:a:f:d:c:l:xi")) != -1) { + switch (opt) + { + case '?': + case 'h': + default: + bad_usage(argv[0], 0); + case 'q': + list_channels = 1; + break; + case 'r': + dvr = 1; + break; + case 'n': + chan_no = strtoul(optarg, NULL, 0); + break; + case 'a': + adapter = strtoul(optarg, NULL, 0); + break; + case 'f': + frontend = strtoul(optarg, NULL, 0); + break; + case 'd': + demux = strtoul(optarg, NULL, 0); + break; + case 'c': + copt = 1; + strncpy(chanfile, optarg, sizeof(chanfile)); + break; + case 'l': + if (lnb_decode(optarg, &lnb_type) < 0) { + bad_usage(argv[0], 1); + return -1; + } + break; + case 'x': + exit_after_tuning = 1; + break; + case 'i': + interactive = 1; + exit_after_tuning = 1; + } + } + lnb_type.low_val *= 1000; /* convert to kiloherz */ + lnb_type.high_val *= 1000; /* convert to kiloherz */ + lnb_type.switch_val *= 1000; /* convert to kiloherz */ + if (optind < argc) + chan_name = argv[optind]; + if (chan_name && chan_no) { + bad_usage(argv[0], 0); + return -1; + } + if (list_channels && (chan_name || chan_no)) { + bad_usage(argv[0], 0); + return -1; + } + if (!list_channels && !chan_name && !chan_no && !interactive) { + bad_usage(argv[0], 0); + return -1; + } + + if (!copt) { + if (!(home = getenv("HOME"))) { + fprintf(stderr, "error: $HOME not set\n"); + return TRUE; + } + strncpy(chanfile, home, sizeof(chanfile)); + strcat(chanfile, "/.szap/" CHANNEL_FILE); + } + + printf("reading channels from file '%s'\n", chanfile); + + if (!read_channels(chanfile, list_channels, chan_no, chan_name, + adapter, frontend, demux, dvr)) + return TRUE; + + return FALSE; +} + |