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dvr.c
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dvr.c
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#include <sys/ioctl.h>
#include <time.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <errno.h>
#include <assert.h>
#include <linux/dvb/dmx.h>
#include <linux/dvb/frontend.h>
#include <event.h>
#include "getstream.h"
const char *pidtnames[]={ "None", "PAT", "PMT", "PCR", "Video", "Audio", "Privat", "User", "Static", "Reassemble", "Other" };
struct pidcallback_s {
void (*callback)(void *data, void *arg);
void *arg;
uint16_t pid;
unsigned int type;
unsigned int pidt;
};
static inline char *dvrname(int adapter) {
static char dvrname[128];
sprintf(dvrname, "/dev/dvb/adapter%d/dvr0", adapter);
return dvrname;
}
static inline void dvr_input_ts(struct adapter_s *a, uint8_t *ts) {
uint16_t pid;
GList *pcbl;
/* TS (Transport Stream) packets start with 0x47 */
if (ts[TS_SYNC_OFF] != TS_SYNC) {
logwrite(LOG_XTREME, "dvr: Non TS Stream packet (!0x47) received on dvr0");
dump_hex(LOG_XTREME, "dvr:", ts, TS_PACKET_SIZE);
return;
}
/* Full stream callbacks - pseudo pid 0x2000 */
for(pcbl=g_list_first(a->dvr.fullcb);pcbl!=NULL;pcbl=g_list_next(pcbl)) {
struct pidcallback_s *pcb=pcbl->data;
pcb->callback(ts, pcb->arg);
}
pid=ts_pid(ts);
a->dvr.pidtable[pid].packets++;
for(pcbl=g_list_first(a->dvr.pidtable[pid].callback);pcbl!=NULL;pcbl=g_list_next(pcbl)) {
struct pidcallback_s *pcb=pcbl->data;
pcb->callback(ts, pcb->arg);
}
}
void dvr_del_pcb(struct adapter_s *a, unsigned int pid, void *vpcb) {
struct pidcallback_s *pcb=vpcb;
logwrite(LOG_DEBUG, "dvr: Del callback for PID %4d (0x%04x) type %d (%s)",
pid, pid, pcb->pidt, pidtnames[pcb->pidt]);
switch(pcb->type) {
case(DVRCB_SECTION):
a->dvr.pidtable[pid].secuser--;
if (!a->dvr.pidtable[pid].secuser) {
/* RECURSION - We want the section so we need the TS */
dvr_del_pcb(a, pid, a->dvr.pidtable[pid].seccb);
a->dvr.pidtable[pid].seccb=NULL;
}
a->dvr.pidtable[pid].sectioncallback=
g_list_remove(a->dvr.pidtable[pid].sectioncallback, pcb);
break;
case(DVRCB_TS):
a->dvr.pidtable[pid].callback=
g_list_remove(a->dvr.pidtable[pid].callback, pcb);
if (!a->dvr.pidtable[pid].callback)
dmx_leave_pid(a, pid);
break;
}
free(pcb);
}
void dvr_section_reassemble(void *ts, void *arg) {
struct dvrpt_s *pidentry=arg;
int off=0;
GList *cbl;
while(off < TS_PACKET_SIZE) {
off=psi_reassemble(pidentry->section, ts, off);
if (off<0)
break;
for(cbl=g_list_first(pidentry->sectioncallback);cbl!=NULL;cbl=g_list_next(cbl)) {
struct pidcallback_s *pcb=cbl->data;
pcb->callback(pidentry->section, pcb->arg);
}
}
}
void *dvr_add_pcb(struct adapter_s *a, unsigned int pid, unsigned int type,
unsigned int pidt, void (*callback)(void *data, void *arg), void *arg) {
struct pidcallback_s *pcb;
logwrite(LOG_DEBUG, "dvr: Add %s callback for PID %4d (0x%04x) type %d (%s)",
((type == DVRCB_TS) ? "TS" : "Section"), pid, pid, pidt, pidtnames[pidt]);
/* FIXME - check for error of malloc */
pcb=malloc(sizeof(struct pidcallback_s));
pcb->pid=pid;
pcb->callback=callback;
pcb->arg=arg;
pcb->pidt=pidt;
pcb->type=type;
/* Joined pseudo pid 0x2000 e.g. input full */
if (pid == PID_MAX+1) {
/* FIXME: How to detect we need to join 0x2000? */
a->dvr.fullcb=g_list_append(a->dvr.fullcb, pcb);
return pcb;
}
switch(type) {
case(DVRCB_SECTION):
if (!a->dvr.pidtable[pid].secuser) {
a->dvr.pidtable[pid].section=psi_section_new();
/* Recursion - SECTION needs the ts packets */
a->dvr.pidtable[pid].seccb=
dvr_add_pcb(a, pid, DVRCB_TS, PID_REASSEMBLE,
dvr_section_reassemble, &a->dvr.pidtable[pid]);
}
a->dvr.pidtable[pid].secuser++;
a->dvr.pidtable[pid].sectioncallback=
g_list_append(a->dvr.pidtable[pid].sectioncallback, pcb);
break;
case(DVRCB_TS):
if (!a->dvr.pidtable[pid].callback)
dmx_join_pid(a, pid, DMX_PES_OTHER);
a->dvr.pidtable[pid].callback=
g_list_append(a->dvr.pidtable[pid].callback, pcb);
break;
}
return pcb;
}
/*
* Read TS packet chunks from dvr0 device and fill them one after
* another into dvr_input_ts
*/
static void dvr_read(int fd, short event, void *arg) {
int len, i;
struct adapter_s *adapter=arg;
uint8_t *db=adapter->dvr.buffer.ptr;
do {
len=read(fd, db, adapter->dvr.buffer.size*TS_PACKET_SIZE);
/*
* Increase readcounter - we need to detect flexcop not delivering
* TS packets anymore e.g. the IRQ Stop bug. A timer will then
* try to issue a frontend tune which will hopefully reset the
* card to deliver packets
*
*/
adapter->dvr.stat.reads++;
/* EOF aka no more TS Packets ? */
if (len == 0)
break;
/* Read returned error ? */
if (len < 0) {
if (errno != EAGAIN)
logwrite(LOG_ERROR, "demux: read in dvr_read returned with errno %d / %s", errno, strerror(errno));
break;
}
/* Loop on TS packets and fill them into dvr_input_ts */
for(i=0;i<len;i+=TS_PACKET_SIZE) {
dvr_input_ts(adapter, &db[i]);
}
} while (len == adapter->dvr.buffer.size*TS_PACKET_SIZE);
}
static void dvr_init_stat_timer(struct adapter_s *a);
#define DVR_STAT_INTERVAL 60
static void dvr_stat_timer(int fd, short event, void *arg) {
struct adapter_s *a=arg;
int i;
unsigned long total=0, pids=0;
for(i=0;i<PID_MAX;i++) {
if (a->dvr.pidtable[i].packets) {
pids++;
total+=a->dvr.pidtable[i].packets;
}
}
logwrite(LOG_INFO, "dvr: inputstats: %d pids %u pkt/s %u byte/s",
pids,
total/a->dvr.stat.interval,
total*TS_PACKET_SIZE/a->dvr.stat.interval);
for(i=0;i<PID_MAX;i++) {
a->dvr.pidtable[i].packets=0;
}
dvr_init_stat_timer(a);
}
static void dvr_init_stat_timer(struct adapter_s *a) {
struct timeval tv;
if (!a->dvr.stat.interval)
return;
a->dvr.stat.last=time(NULL);
tv.tv_sec=a->dvr.stat.interval;
tv.tv_usec=0;
evtimer_set(&a->dvr.stat.event, dvr_stat_timer, a);
evtimer_add(&a->dvr.stat.event, &tv);
}
static void dvr_stuck_init(struct adapter_s *a);
static void dvr_stuck_timer(int fd, short event, void *arg) {
struct adapter_s *adapter=arg;
/*
* Flexcop is known to randomly lockup. A workaround in the kernel
* driver is to reset some registers known to reanimate the flexcop.
*
* See: http://lkml.org/lkml/2005/6/27/135
*
* The patch went into 2.6.13-rc3 so in case you are running an FlexCop based
* card (SkyStar2, AirStar) you better upgrade to 2.6.13 or better.
*
* First try was to retune which itself is not enough. One needs to bring
* down the number of received pids to 0 as the transition from 0 -> 1 resets
* the board. So let dmx bounce all filters.
*
*/
if (adapter->dvr.stat.reads == 0) {
logwrite(LOG_ERROR, "dvr: lockup of DVB card detected - trying to reanimate via bouncing filter");
fe_retune(adapter);
dmx_bounce_filter(adapter);
}
adapter->dvr.stat.reads=0;
dvr_stuck_init(adapter);
}
static void dvr_stuck_init(struct adapter_s *a) {
struct timeval tv;
/* stuck-interval 0; disables the stuck check timer */
if (!a->dvr.stuckinterval)
return;
tv.tv_sec=a->dvr.stuckinterval/1000;
tv.tv_usec=a->dvr.stuckinterval%1000*1000;
evtimer_set(&a->dvr.stucktimer, dvr_stuck_timer, a);
evtimer_add(&a->dvr.stucktimer, &tv);
}
int dvr_init(struct adapter_s *a) {
int dvrfd;
a->dvr.buffer.ptr=malloc(a->dvr.buffer.size*TS_PACKET_SIZE);
dvrfd=open(dvrname(a->no), O_RDONLY|O_NONBLOCK);
if (dvrfd < 0)
return 0;
event_set(&a->dvr.dvrevent, dvrfd, EV_READ|EV_PERSIST, dvr_read, a);
event_add(&a->dvr.dvrevent, NULL);
if (a->budgetmode) {
if (!dmx_join_pid(a, 0x2000, DMX_PES_OTHER)) {
logwrite(LOG_INFO, "demux: Setting budget filter failed - switching off budget mode");
a->budgetmode=0;
}
}
a->dvr.fd=dvrfd;
dvr_init_stat_timer(a);
dvr_stuck_init(a);
return 1;
}