aboutsummaryrefslogtreecommitdiffstats
path: root/util/gnutv/gnutv_dvb.c
diff options
context:
space:
mode:
Diffstat (limited to 'util/gnutv/gnutv_dvb.c')
-rw-r--r--util/gnutv/gnutv_dvb.c376
1 files changed, 376 insertions, 0 deletions
diff --git a/util/gnutv/gnutv_dvb.c b/util/gnutv/gnutv_dvb.c
new file mode 100644
index 0000000..a903c26
--- /dev/null
+++ b/util/gnutv/gnutv_dvb.c
@@ -0,0 +1,376 @@
+/*
+ gnutv utility
+
+ Copyright (C) 2004, 2005 Manu Abraham <abraham.manu@gmail.com>
+ Copyright (C) 2006 Andrew de Quincey (adq_dvb@lidskialf.net)
+
+ 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 <unistd.h>
+#include <limits.h>
+#include <string.h>
+#include <signal.h>
+#include <pthread.h>
+#include <errno.h>
+#include <sys/poll.h>
+#include <libdvbapi/dvbdemux.h>
+#include <libucsi/section.h>
+#include <libucsi/mpeg/section.h>
+#include <libucsi/dvb/section.h>
+#include "gnutv.h"
+#include "gnutv_dvb.h"
+#include "gnutv_data.h"
+#include "gnutv_ca.h"
+
+#define FE_STATUS_PARAMS (DVBFE_INFO_LOCKSTATUS|DVBFE_INFO_SIGNAL_STRENGTH|DVBFE_INFO_BER|DVBFE_INFO_SNR|DVBFE_INFO_UNCORRECTED_BLOCKS)
+
+static int dvbthread_shutdown = 0;
+static pthread_t dvbthread;
+static int tune_state = 0;
+
+static int pat_version = -1;
+static int ca_pmt_version = -1;
+static int data_pmt_version = -1;
+
+static void *dvbthread_func(void* arg);
+
+static void process_pat(int pat_fd, struct gnutv_dvb_params *params, int *pmt_fd, struct pollfd *pollfd);
+static void process_tdt(int tdt_fd);
+static void process_pmt(int pmt_fd, struct gnutv_dvb_params *params);
+static int create_section_filter(int adapter, int demux, uint16_t pid, uint8_t table_id);
+
+
+int gnutv_dvb_start(struct gnutv_dvb_params *params)
+{
+ pthread_create(&dvbthread, NULL, dvbthread_func, (void*) params);
+ return 0;
+}
+
+void gnutv_dvb_stop(void)
+{
+ dvbthread_shutdown = 1;
+ pthread_join(dvbthread, NULL);
+}
+
+int gnutv_dvb_locked(void)
+{
+ return tune_state == 2;
+}
+
+static void *dvbthread_func(void* arg)
+{
+ int pat_fd = -1;
+ int pmt_fd = -1;
+ int tdt_fd = -1;
+ struct pollfd pollfds[3];
+
+ struct gnutv_dvb_params *params = (struct gnutv_dvb_params *) arg;
+
+ tune_state = 0;
+
+ // create PAT filter
+ if ((pat_fd = create_section_filter(params->adapter_id, params->demux_id,
+ TRANSPORT_PAT_PID, stag_mpeg_program_association)) < 0) {
+ fprintf(stderr, "Failed to create PAT section filter\n");
+ exit(1);
+ }
+ pollfds[0].fd = pat_fd;
+ pollfds[0].events = POLLIN|POLLPRI|POLLERR;
+
+ // create TDT filter
+ if ((tdt_fd = create_section_filter(params->adapter_id, params->demux_id, TRANSPORT_TDT_PID, stag_dvb_time_date)) < 0) {
+ fprintf(stderr, "Failed to create TDT section filter\n");
+ exit(1);
+ }
+ pollfds[1].fd = tdt_fd;
+ pollfds[1].events = POLLIN|POLLPRI|POLLERR;
+
+ // zero PMT filter
+ pollfds[2].fd = 0;
+ pollfds[2].events = 0;
+
+ // the DVB loop
+ while(!dvbthread_shutdown) {
+ // tune frontend + monitor lock status
+ if (tune_state == 0) {
+ // get the type of frontend
+ struct dvbfe_info result;
+ char *types;
+ memset(&result, 0, sizeof(result));
+ dvbfe_get_info(params->fe, 0, &result, DVBFE_INFO_QUERYTYPE_IMMEDIATE, 0);
+ switch(result.type) {
+ case DVBFE_TYPE_DVBS:
+ types = "DVB-S";
+ break;
+ case DVBFE_TYPE_DVBC:
+ types = "DVB-C";
+ break;
+ case DVBFE_TYPE_DVBT:
+ types = "DVB-T";
+ break;
+ case DVBFE_TYPE_ATSC:
+ types = "ATSC";
+ break;
+ default:
+ types = "Unknown";
+ }
+ fprintf(stderr, "Using frontend \"%s\", type %s\n", result.name, types);
+
+ // do we have a valid SEC configuration?
+ struct dvbsec_config *sec = NULL;
+ if (params->valid_sec)
+ sec = &params->sec;
+
+ // tune!
+ if (dvbsec_set(params->fe,
+ sec,
+ params->channel.polarization,
+ (params->channel.diseqc_switch & 0x01) ? DISEQC_SWITCH_B : DISEQC_SWITCH_A,
+ (params->channel.diseqc_switch & 0x02) ? DISEQC_SWITCH_B : DISEQC_SWITCH_A,
+ &params->channel.fe_params,
+ 0)) {
+ fprintf(stderr, "Failed to set frontend\n");
+ exit(1);
+ }
+
+ tune_state++;
+ } else if (tune_state == 1) {
+ struct dvbfe_info result;
+ memset(&result, 0, sizeof(result));
+ dvbfe_get_info(params->fe,
+ FE_STATUS_PARAMS,
+ &result,
+ DVBFE_INFO_QUERYTYPE_IMMEDIATE,
+ 0);
+
+ fprintf(stderr, "status %c%c%c%c%c | signal %04x | snr %04x | ber %08x | unc %08x | %s\r",
+ result.signal ? 'S' : ' ',
+ result.carrier ? 'C' : ' ',
+ result.viterbi ? 'V' : ' ',
+ result.sync ? 'Y' : ' ',
+ result.lock ? 'L' : ' ',
+ result.signal_strength,
+ result.snr,
+ result.ber,
+ result.ucblocks,
+ result.lock ? "FE_HAS_LOCK" : "");
+ fflush(stderr);
+
+ if (result.lock) {
+ tune_state++;
+ fprintf(stderr, "\n");
+ fflush(stderr);
+ } else {
+ usleep(500000);
+ }
+ }
+
+ // is there SI data?
+ int count = poll(pollfds, 3, 100);
+ if (count < 0) {
+ if (errno != EINTR)
+ fprintf(stderr, "Poll error: %m\n");
+ break;
+ }
+ if (count == 0) {
+ continue;
+ }
+
+ // PAT
+ if (pollfds[0].revents & (POLLIN|POLLPRI)) {
+ process_pat(pat_fd, params, &pmt_fd, &pollfds[2]);
+ }
+
+ // TDT
+ if (pollfds[1].revents & (POLLIN|POLLPRI)) {
+ process_tdt(tdt_fd);
+ }
+
+ // PMT
+ if (pollfds[2].revents & (POLLIN|POLLPRI)) {
+ process_pmt(pmt_fd, params);
+ }
+ }
+
+ // close demuxers
+ if (pat_fd != -1)
+ close(pat_fd);
+ if (pmt_fd != -1)
+ close(pmt_fd);
+ if (tdt_fd != -1)
+ close(tdt_fd);
+
+ return 0;
+}
+
+static void process_pat(int pat_fd, struct gnutv_dvb_params *params, int *pmt_fd, struct pollfd *pollfd)
+{
+ int size;
+ uint8_t sibuf[4096];
+
+ // read the section
+ if ((size = read(pat_fd, sibuf, sizeof(sibuf))) < 0) {
+ return;
+ }
+
+ // parse section
+ struct section *section = section_codec(sibuf, size);
+ if (section == NULL) {
+ return;
+ }
+
+ // parse section_ext
+ struct section_ext *section_ext = section_ext_decode(section, 0);
+ if (section_ext == NULL) {
+ return;
+ }
+ if (pat_version == section_ext->version_number) {
+ return;
+ }
+
+ // parse PAT
+ struct mpeg_pat_section *pat = mpeg_pat_section_codec(section_ext);
+ if (pat == NULL) {
+ return;
+ }
+
+ // try and find the requested program
+ struct mpeg_pat_program *cur_program;
+ mpeg_pat_section_programs_for_each(pat, cur_program) {
+ if (cur_program->program_number == params->channel.service_id) {
+ // close old PMT fd
+ if (*pmt_fd != -1)
+ close(*pmt_fd);
+
+ // create PMT filter
+ if ((*pmt_fd = create_section_filter(params->adapter_id, params->demux_id,
+ cur_program->pid, stag_mpeg_program_map)) < 0) {
+ return;
+ }
+ pollfd->fd = *pmt_fd;
+ pollfd->events = POLLIN|POLLPRI|POLLERR;
+
+ gnutv_data_new_pat(cur_program->pid);
+
+ // we have a new PMT pid
+ data_pmt_version = -1;
+ ca_pmt_version = -1;
+ break;
+ }
+ }
+
+ // remember the PAT version
+ pat_version = section_ext->version_number;
+}
+
+static void process_tdt(int tdt_fd)
+{
+ int size;
+ uint8_t sibuf[4096];
+
+ // read the section
+ if ((size = read(tdt_fd, sibuf, sizeof(sibuf))) < 0) {
+ return;
+ }
+
+ // parse section
+ struct section *section = section_codec(sibuf, size);
+ if (section == NULL) {
+ return;
+ }
+
+ // parse TDT
+ struct dvb_tdt_section *tdt = dvb_tdt_section_codec(section);
+ if (tdt == NULL) {
+ return;
+ }
+
+ // done
+ gnutv_ca_new_dvbtime(dvbdate_to_unixtime(tdt->utc_time));
+}
+
+static void process_pmt(int pmt_fd, struct gnutv_dvb_params *params)
+{
+ int size;
+ uint8_t sibuf[4096];
+
+ // read the section
+ if ((size = read(pmt_fd, sibuf, sizeof(sibuf))) < 0) {
+ return;
+ }
+
+ // parse section
+ struct section *section = section_codec(sibuf, size);
+ if (section == NULL) {
+ return;
+ }
+
+ // parse section_ext
+ struct section_ext *section_ext = section_ext_decode(section, 0);
+ if (section_ext == NULL) {
+ return;
+ }
+ if ((section_ext->table_id_ext != params->channel.service_id) ||
+ ((section_ext->version_number == data_pmt_version) &&
+ (section_ext->version_number == ca_pmt_version))) {
+ return;
+ }
+
+ // parse PMT
+ struct mpeg_pmt_section *pmt = mpeg_pmt_section_codec(section_ext);
+ if (pmt == NULL) {
+ return;
+ }
+
+ // do data handling
+ if (section_ext->version_number != data_pmt_version) {
+ if (gnutv_data_new_pmt(pmt) == 1)
+ data_pmt_version = pmt->head.version_number;
+ }
+
+ // do ca handling
+ if (section_ext->version_number != ca_pmt_version) {
+ if (gnutv_ca_new_pmt(pmt) == 1)
+ ca_pmt_version = pmt->head.version_number;
+ }
+}
+
+static int create_section_filter(int adapter, int demux, uint16_t pid, uint8_t table_id)
+{
+ int demux_fd = -1;
+ uint8_t filter[18];
+ uint8_t mask[18];
+
+ // open the demuxer
+ if ((demux_fd = dvbdemux_open_demux(adapter, demux, 0)) < 0) {
+ return -1;
+ }
+
+ // create a section filter
+ memset(filter, 0, sizeof(filter));
+ memset(mask, 0, sizeof(mask));
+ filter[0] = table_id;
+ mask[0] = 0xFF;
+ if (dvbdemux_set_section_filter(demux_fd, pid, filter, mask, 1, 1)) {
+ close(demux_fd);
+ return -1;
+ }
+
+ // done
+ return demux_fd;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 04:40:57 +0000