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/*
* libdvbdemux - a DVB demux library
*
* Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <sys/param.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include <ctype.h>
#include <errno.h>
#include <linux/dvb/dmx.h>
#include "dvbdemux.h"
int dvbdemux_open_demux(int adapter, int demuxdevice, int nonblocking)
{
char filename[PATH_MAX+1];
int flags = O_RDWR;
int fd;
if (nonblocking)
flags |= O_NONBLOCK;
sprintf(filename, "/dev/dvb/adapter%i/demux%i", adapter, demuxdevice);
if ((fd = open(filename, flags)) < 0) {
// if that failed, try a flat /dev structure
sprintf(filename, "/dev/dvb%i.demux%i", adapter, demuxdevice);
fd = open(filename, flags);
}
return fd;
}
int dvbdemux_open_dvr(int adapter, int dvrdevice, int readonly, int nonblocking)
{
char filename[PATH_MAX+1];
int flags = O_RDWR;
int fd;
if (readonly)
flags = O_RDONLY;
if (nonblocking)
flags |= O_NONBLOCK;
sprintf(filename, "/dev/dvb/adapter%i/dvr%i", adapter, dvrdevice);
if ((fd = open(filename, flags)) < 0) {
// if that failed, try a flat /dev structure
sprintf(filename, "/dev/dvb%i.dvr%i", adapter, dvrdevice);
fd = open(filename, flags);
}
return fd;
}
int dvbdemux_set_section_filter(int fd, int pid,
uint8_t filter[18], uint8_t mask[18],
int start, int checkcrc)
{
struct dmx_sct_filter_params sctfilter;
memset(&sctfilter, 0, sizeof(sctfilter));
sctfilter.pid = pid;
memcpy(sctfilter.filter.filter, filter, 1);
memcpy(sctfilter.filter.filter+1, filter+3, 15);
memcpy(sctfilter.filter.mask, mask, 1);
memcpy(sctfilter.filter.mask+1, mask+3, 15);
memset(sctfilter.filter.mode, 0, 16);
if (start)
sctfilter.flags |= DMX_IMMEDIATE_START;
if (checkcrc)
sctfilter.flags |= DMX_CHECK_CRC;
return ioctl(fd, DMX_SET_FILTER, &sctfilter);
}
int dvbdemux_set_pes_filter(int fd, int pid,
int input, int output,
int pestype,
int start)
{
struct dmx_pes_filter_params filter;
memset(&filter, 0, sizeof(filter));
filter.pid = pid;
switch(input) {
case DVBDEMUX_INPUT_FRONTEND:
filter.input = DMX_IN_FRONTEND;
break;
case DVBDEMUX_INPUT_DVR:
filter.input = DMX_IN_DVR;
break;
default:
return -EINVAL;
}
switch(output) {
case DVBDEMUX_OUTPUT_DECODER:
filter.output = DMX_OUT_DECODER;
break;
case DVBDEMUX_OUTPUT_DEMUX:
filter.output = DMX_OUT_TAP;
break;
case DVBDEMUX_OUTPUT_DVR:
filter.output = DMX_OUT_TS_TAP;
break;
#ifdef DMX_OUT_TSDEMUX_TAP
case DVBDEMUX_OUTPUT_TS_DEMUX:
filter.output = DMX_OUT_TSDEMUX_TAP;
break;
#endif
default:
return -EINVAL;
}
switch(pestype) {
case DVBDEMUX_PESTYPE_AUDIO:
filter.pes_type = DMX_PES_AUDIO;
break;
case DVBDEMUX_PESTYPE_VIDEO:
filter.pes_type = DMX_PES_VIDEO;
break;
case DVBDEMUX_PESTYPE_TELETEXT:
filter.pes_type = DMX_PES_TELETEXT;
break;
case DVBDEMUX_PESTYPE_SUBTITLE:
filter.pes_type = DMX_PES_SUBTITLE;
break;
case DVBDEMUX_PESTYPE_PCR:
filter.pes_type = DMX_PES_PCR;
break;
default:
return -EINVAL;
}
if (start)
filter.flags |= DMX_IMMEDIATE_START;
return ioctl(fd, DMX_SET_PES_FILTER, &filter);
}
int dvbdemux_set_pid_filter(int fd, int pid,
int input, int output,
int start)
{
struct dmx_pes_filter_params filter;
memset(&filter, 0, sizeof(filter));
if (pid == -1)
filter.pid = 0x2000;
else
filter.pid = pid;
switch(input) {
case DVBDEMUX_INPUT_FRONTEND:
filter.input = DMX_IN_FRONTEND;
break;
case DVBDEMUX_INPUT_DVR:
filter.input = DMX_IN_DVR;
break;
default:
return -EINVAL;
}
switch(output) {
case DVBDEMUX_OUTPUT_DECODER:
filter.output = DMX_OUT_DECODER;
break;
case DVBDEMUX_OUTPUT_DEMUX:
filter.output = DMX_OUT_TAP;
break;
case DVBDEMUX_OUTPUT_DVR:
filter.output = DMX_OUT_TS_TAP;
break;
#ifdef DMX_OUT_TSDEMUX_TAP
case DVBDEMUX_OUTPUT_TS_DEMUX:
filter.output = DMX_OUT_TSDEMUX_TAP;
break;
#endif
default:
return -EINVAL;
}
filter.pes_type = DMX_PES_OTHER;
if (start)
filter.flags |= DMX_IMMEDIATE_START;
return ioctl(fd, DMX_SET_PES_FILTER, &filter);
}
int dvbdemux_start(int fd)
{
return ioctl(fd, DMX_START);
}
int dvbdemux_stop(int fd)
{
return ioctl(fd, DMX_STOP);
}
int dvbdemux_get_stc(int fd, uint64_t *stc)
{
struct dmx_stc _stc;
int result;
memset(stc, 0, sizeof(_stc));
if ((result = ioctl(fd, DMX_GET_STC, &_stc)) != 0) {
return result;
}
*stc = _stc.stc / _stc.base;
return 0;
}
int dvbdemux_set_buffer(int fd, int bufsize)
{
return ioctl(fd, DMX_SET_BUFFER_SIZE, bufsize);
}
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