184 lines
4.1 KiB
C
184 lines
4.1 KiB
C
/*
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* Output functions for fixed multicast streaming
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* Copyright (C) 2007 Andreas Öman
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <assert.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include "tvhead.h"
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#include "channels.h"
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#include "subscriptions.h"
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#include "serviceprobe.h"
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#include "transports.h"
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/* List of transports to be probed, protected with global_lock */
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static struct th_transport_queue serviceprobe_queue;
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static pthread_cond_t serviceprobe_cond;
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/**
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*
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*/
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void
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serviceprobe_enqueue(th_transport_t *t)
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{
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if(!transport_is_tv(t))
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return; /* Don't even consider non-tv channels */
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if(t->tht_sp_onqueue)
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return;
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if(t->tht_ch != NULL)
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return; /* Already mapped */
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t->tht_sp_onqueue = 1;
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TAILQ_INSERT_TAIL(&serviceprobe_queue, t, tht_sp_link);
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pthread_cond_signal(&serviceprobe_cond);
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}
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/**
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*
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*/
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static void
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serviceprobe_callback(struct th_subscription *s, subscription_event_t event,
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void *opaque)
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{
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th_transport_t *t = opaque;
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channel_t *ch;
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const char *errmsg;
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switch(event) {
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case SUBSCRIPTION_TRANSPORT_RUN:
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return;
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case SUBSCRIPTION_NO_INPUT:
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errmsg = "No input detected";
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break;
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case SUBSCRIPTION_NO_DESCRAMBLER:
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errmsg = "No descrambler available";
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break;
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case SUBSCRIPTION_NO_ACCESS:
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errmsg = "Access denied";
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break;
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case SUBSCRIPTION_RAW_INPUT:
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errmsg = "Unable to reassemble packets from input";
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break;
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case SUBSCRIPTION_VALID_PACKETS:
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errmsg = NULL; /* All OK */
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break;
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case SUBSCRIPTION_TRANSPORT_NOT_AVAILABLE:
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case SUBSCRIPTION_TRANSPORT_LOST:
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errmsg = "Unable to probe";
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break;
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case SUBSCRIPTION_DESTROYED:
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return; /* All done */
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default:
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abort();
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}
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assert(t == TAILQ_FIRST(&serviceprobe_queue));
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if(errmsg != NULL) {
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tvhlog(LOG_INFO, "serviceprobe", "%20s: skipped: %s",
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t->tht_svcname, errmsg);
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} else if(t->tht_ch == NULL) {
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ch = channel_find_by_name(t->tht_svcname, 1);
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transport_map_channel(t, ch);
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pthread_mutex_lock(&t->tht_stream_mutex);
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t->tht_config_change(t);
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pthread_mutex_unlock(&t->tht_stream_mutex);
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tvhlog(LOG_INFO, "serviceprobe", "\"%s\" mapped to channel \"%s\"",
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t->tht_svcname, t->tht_svcname);
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}
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t->tht_sp_onqueue = 0;
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TAILQ_REMOVE(&serviceprobe_queue, t, tht_sp_link);
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pthread_cond_signal(&serviceprobe_cond);
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}
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/**
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*
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*/
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static void *
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serviceprobe_thread(void *aux)
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{
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th_transport_t *t;
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th_subscription_t *s;
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int was_doing_work = 0;
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pthread_mutex_lock(&global_lock);
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while(1) {
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while((t = TAILQ_FIRST(&serviceprobe_queue)) == NULL) {
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if(was_doing_work) {
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tvhlog(LOG_INFO, "serviceprobe", "Now idle");
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was_doing_work = 0;
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}
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pthread_cond_wait(&serviceprobe_cond, &global_lock);
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}
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if(!was_doing_work) {
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tvhlog(LOG_INFO, "serviceprobe", "Starting");
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}
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s = subscription_create_from_transport(t, "serviceprobe",
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serviceprobe_callback, t);
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s->ths_force_demux = 1;
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/* Wait for something to happen */
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while(TAILQ_FIRST(&serviceprobe_queue) == t)
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pthread_cond_wait(&serviceprobe_cond, &global_lock);
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subscription_unsubscribe(s);
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was_doing_work = 1;
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}
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return NULL;
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}
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/**
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*
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*/
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void
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serviceprobe_init(void)
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{
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pthread_t ptid;
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pthread_cond_init(&serviceprobe_cond, NULL);
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TAILQ_INIT(&serviceprobe_queue);
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pthread_create(&ptid, NULL, serviceprobe_thread, NULL);
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}
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