176 lines
3.8 KiB
C
176 lines
3.8 KiB
C
/*
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* TV Input - Linux DVB interface
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* Copyright (C) 2012 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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/**
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* DVB input from a raw transport stream
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*/
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#include <assert.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <linux/dvb/frontend.h>
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#include <linux/dvb/dmx.h>
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#include <sys/epoll.h>
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#include "tvheadend.h"
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#include "dvb.h"
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#include "service.h"
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/**
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* Install filters for a service
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*
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* global_lock must be held
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*/
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static void
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open_service(th_dvb_adapter_t *tda, service_t *s)
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{
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// NOP -- We receive all PIDs anyway
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}
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/**
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* Remove filters for a service
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*
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* global_lock must be held
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*/
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static void
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close_service(th_dvb_adapter_t *tda, service_t *s)
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{
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// NOP -- open_service() is a NOP
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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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open_table(th_dvb_mux_instance_t *tdmi, th_dvb_table_t *tdt)
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{
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th_dvb_adapter_t *tda = tdmi->tdmi_adapter;
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assert(tdt->tdt_pid < 0x2000);
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tda->tda_table_filter[tdt->tdt_pid] = 1;
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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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close_table(th_dvb_mux_instance_t *tdmi, th_dvb_table_t *tdt)
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{
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th_dvb_adapter_t *tda = tdmi->tdmi_adapter;
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assert(tdt->tdt_pid < 0x2000);
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tda->tda_table_filter[tdt->tdt_pid] = 0;
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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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got_section(const uint8_t *data, size_t len, void *opaque)
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{
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th_dvb_table_t *tdt = opaque;
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dvb_table_dispatch((uint8_t *)data, len, tdt);
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}
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/**
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* All the tables can be destroyed from any of the callbacks
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* so we need to be a bit careful here
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*/
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static void
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dvb_table_raw_dispatch(th_dvb_mux_instance_t *tdmi,
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const dvb_table_feed_t *dtf)
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{
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int pid = (dtf->dtf_tsb[1] & 0x1f) << 8 | dtf->dtf_tsb[2];
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th_dvb_table_t *vec[tdmi->tdmi_num_tables], *tdt;
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int i = 0;
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LIST_FOREACH(tdt, &tdmi->tdmi_tables, tdt_link) {
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vec[i++] = tdt;
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tdt->tdt_refcount++;
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}
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assert(i == tdmi->tdmi_num_tables);
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int len = tdmi->tdmi_num_tables; // can change during callbacks
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for(i = 0; i < len; i++) {
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tdt = vec[i];
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if(!tdt->tdt_destroyed) {
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if(tdt->tdt_pid == pid)
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psi_section_reassemble(&tdt->tdt_sect, dtf->dtf_tsb,
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0, got_section, tdt);
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}
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dvb_table_release(tdt);
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}
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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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dvb_table_input(void *aux)
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{
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th_dvb_adapter_t *tda = aux;
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th_dvb_mux_instance_t *tdmi;
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dvb_table_feed_t *dtf;
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while(1) {
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pthread_mutex_lock(&tda->tda_delivery_mutex);
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while((dtf = TAILQ_FIRST(&tda->tda_table_feed)) == NULL)
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pthread_cond_wait(&tda->tda_table_feed_cond, &tda->tda_delivery_mutex);
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TAILQ_REMOVE(&tda->tda_table_feed, dtf, dtf_link);
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pthread_mutex_unlock(&tda->tda_delivery_mutex);
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pthread_mutex_lock(&global_lock);
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if((tdmi = tda->tda_mux_current) != NULL)
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dvb_table_raw_dispatch(tdmi, dtf);
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pthread_mutex_unlock(&global_lock);
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free(dtf);
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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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dvb_input_raw_setup(th_dvb_adapter_t *tda)
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{
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tda->tda_rawmode = 1;
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tda->tda_open_service = open_service;
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tda->tda_close_service = close_service;
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tda->tda_open_table = open_table;
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tda->tda_close_table = close_table;
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TAILQ_INIT(&tda->tda_table_feed);
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pthread_cond_init(&tda->tda_table_feed_cond, NULL);
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pthread_t ptid;
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pthread_create(&ptid, NULL, dvb_table_input, tda);
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}
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