dvb.c
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上传日期:2009-03-27
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- /*****************************************************************************
- * dvb.c : functions to control a DVB card under Linux
- *****************************************************************************
- * Copyright (C) 1998-2001 VideoLAN
- *
- * Authors: Damien Lucas <nitrox@via.ecp.fr>
- * Johan Bilien <jobi@via.ecp.fr>
- *
- * 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- #include <vlc/vlc.h>
- #include <sys/ioctl.h>
- #include <stdio.h>
- #ifdef HAVE_INTTYPES_H
- # include <inttypes.h> /* int16_t .. */
- #endif
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <fcntl.h>
- #include <time.h>
- #include <unistd.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <sys/poll.h>
- /* DVB Card Drivers */
- #include <ost/sec.h>
- #include <ost/dmx.h>
- #include <ost/frontend.h>
- #include "dvb.h"
- /*****************************************************************************
- * ioctl_SECControl : commands the SEC device
- *****************************************************************************/
- int ioctl_SECControl( int sec_nb, int freq, int pol, int lnb_slof, int diseqc )
- {
- struct secCommand scmd;
- struct secCmdSequence scmds;
- int sec;
- char psz_sec[255];
- snprintf(psz_sec, sizeof(psz_sec), SEC "%d", sec_nb);
- if((sec = open(psz_sec, O_RDWR)) < 0)
- {
- return -1;
- }
- /* Set the frequency of the transponder, taking into account the
- local frequencies of the LNB */
- scmds.continuousTone = (freq<lnb_slof) ? SEC_TONE_OFF : SEC_TONE_ON;
- /* Set the polarity of the transponder by setting the correct
- voltage on the universal LNB */
- scmds.voltage = (pol) ? SEC_VOLTAGE_18 : SEC_VOLTAGE_13;
- /* In case we have a DiSEqC, set it to the correct address */
- scmd.type=0;
- scmd.u.diseqc.addr=0x10;
- scmd.u.diseqc.cmd=0x38;
- scmd.u.diseqc.numParams=1;
- scmd.u.diseqc.params[0] = 0xF0 | ((diseqc * 4) & 0x0F) |
- (scmds.continuousTone == SEC_TONE_ON ? 1 : 0) |
- (scmds.voltage==SEC_VOLTAGE_18 ? 2 : 0);
- scmds.miniCommand=SEC_MINI_NONE;
- scmds.numCommands=1;
- scmds.commands=&scmd;
- /* Send the data to the SEC device to prepare the LNB for tuning */
- /*intf_Msg("Sec: Sending datan");*/
- if (ioctl(sec, SEC_SEND_SEQUENCE, &scmds) < 0)
- {
- return -1;
- }
- close(sec);
- return 0;
- }
- static int check_qpsk( int );
- /*****************************************************************************
- * ioctl_SetQPSKFrontend : controls the FE device
- *****************************************************************************/
- int ioctl_SetQPSKFrontend (int fe_nb, int freq, int srate, int fec,
- int lnb_lof1, int lnb_lof2, int lnb_slof)
- {
- FrontendParameters fep;
- int front;
- int rc;
- char psz_fe[255];
- snprintf(psz_fe, sizeof(psz_fe), FRONTEND "%d", fe_nb);
- /* Open the frontend device */
- if((front = open(psz_fe, O_RDWR)) < 0)
- {
- return -1;
- }
- /* Set the frequency of the transponder, taking into account the
- local frequencies of the LNB */
- fep.Frequency = (freq < lnb_slof) ? freq - lnb_lof1 : freq - lnb_lof2;
- /* Set symbol rate and FEC */
- fep.u.qpsk.SymbolRate = srate;
- fep.u.qpsk.FEC_inner = FEC_AUTO;
- /* Now send it all to the frontend device */
- if (ioctl(front, FE_SET_FRONTEND, &fep) < 0)
- {
- return -1;
- }
- /* Check if it worked */
- rc=check_qpsk(front);
- /* Close front end device */
- close(front);
-
- return rc;
- }
- /******************************************************************
- * Check completion of the frontend control sequence
- ******************************************************************/
- static int check_qpsk(int front)
- {
- struct pollfd pfd[1];
- FrontendEvent event;
- /* poll for QPSK event to check if tuning worked */
- pfd[0].fd = front;
- pfd[0].events = POLLIN;
- if (poll(pfd,1,3000))
- {
- if (pfd[0].revents & POLLIN)
- {
- if ( ioctl(front, FE_GET_EVENT, &event) == -EBUFFEROVERFLOW)
- {
- return -5;
- }
-
- switch(event.type)
- {
- case FE_UNEXPECTED_EV:
- return -2;
- case FE_FAILURE_EV:
- return -1;
- case FE_COMPLETION_EV:
- break;
- }
- }
- else
- {
- /* should come here */
- return -3;
- }
- }
- else
- {
- return -4;
- }
-
- return 0;
- }
- /*****************************************************************************
- * ioctl_SetDMXAudioFilter : controls the demux to add a filter
- *****************************************************************************/
- int ioctl_SetDMXFilter( int dmx_nb, int i_pid, int * pi_fd , int i_type )
- {
- struct dmxPesFilterParams s_filter_params;
- char psz_dmx[255];
- snprintf(psz_dmx, sizeof(psz_dmx), DMX "%d", dmx_nb);
- /* We first open the device */
- if ((*pi_fd = open(psz_dmx, O_RDWR|O_NONBLOCK)) < 0)
- {
- return -1;
- }
- /* We fill the DEMUX structure : */
- s_filter_params.pid = i_pid;
- s_filter_params.input = DMX_IN_FRONTEND;
- s_filter_params.output = DMX_OUT_TS_TAP;
- switch ( i_type )
- {
- /* AFAIK you shouldn't use DMX_PES_VIDEO and DMX_PES_AUDIO
- * unless you want to use a hardware decoder. In all cases
- * I know DMX_PES_OTHER is quite enough for what we want to
- * do. In case you have problems, you can still try to
- * reenable them here : --Meuuh */
- #if 0
- case 1:
- s_filter_params.pesType = DMX_PES_VIDEO;
- break;
- case 2:
- s_filter_params.pesType = DMX_PES_AUDIO;
- break;
- case 3:
- #endif
- default:
- s_filter_params.pesType = DMX_PES_OTHER;
- break;
- }
- s_filter_params.flags = DMX_IMMEDIATE_START;
- /* We then give the order to the device : */
- if (ioctl(*pi_fd, DMX_SET_PES_FILTER, &s_filter_params) < 0)
- {
- return -1;
- }
- return 0;
- }
- /*****************************************************************************
- * ioctl_UnsetDMXFilter : removes a filter
- *****************************************************************************/
- int ioctl_UnsetDMXFilter(int demux)
- {
- ioctl(demux, DMX_STOP);
- close(demux);
- return 0;
- }
- /*****************************************************************************
- * ioctl_SetBufferSize :
- *****************************************************************************/
- int ioctl_SetBufferSize(int handle, size_t size)
- {
- return ioctl(handle, DMX_SET_BUFFER_SIZE, size);
- }