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https://github.com/mpv-player/mpv
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95cfe58e3d
This is needed so that new processes (created with fork+exec) don't inherit open files, which can be important for a number of reasons. Since O_CLOEXEC is relatively new (POSIX.1-2008, before that Linux specific), we #define it to 0 in io.h to prevent compilation errors on older/crappy systems. At least this is the plan. input.c creates a pipe. For that, add a mp_set_cloexec() function (which is based on Weston's code in vo_wayland.c, but more correct). We could use pipe2() instead, but that is Linux specific. Technically, we have a race condition, but it won't matter.
445 lines
12 KiB
C
445 lines
12 KiB
C
/* dvbtune - tune.c
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Copyright (C) Dave Chapman 2001,2002
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Modified for use with MPlayer, for details see the changelog at
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http://svn.mplayerhq.hu/mplayer/trunk/
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$Id$
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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Or, point your browser to http://www.gnu.org/copyleft/gpl.html
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <sys/ioctl.h>
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#include <poll.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <time.h>
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#include <errno.h>
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#include <linux/dvb/dmx.h>
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#include <linux/dvb/frontend.h>
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#include "config.h"
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#include "osdep/io.h"
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#include "dvbin.h"
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#include "dvb_tune.h"
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#include "mpvcore/mp_msg.h"
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int dvb_get_tuner_type(int fe_fd)
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{
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struct dvb_frontend_info fe_info;
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int res;
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res = ioctl(fe_fd, FE_GET_INFO, &fe_info);
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if(res < 0)
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{
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mp_msg(MSGT_DEMUX, MSGL_ERR, "FE_GET_INFO error: %d, FD: %d\n\n", errno, fe_fd);
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return 0;
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}
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switch(fe_info.type)
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{
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case FE_OFDM:
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mp_msg(MSGT_DEMUX, MSGL_V, "TUNER TYPE SEEMS TO BE DVB-T\n");
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return TUNER_TER;
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case FE_QPSK:
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mp_msg(MSGT_DEMUX, MSGL_V, "TUNER TYPE SEEMS TO BE DVB-S\n");
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return TUNER_SAT;
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case FE_QAM:
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mp_msg(MSGT_DEMUX, MSGL_V, "TUNER TYPE SEEMS TO BE DVB-C\n");
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return TUNER_CBL;
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#ifdef DVB_ATSC
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case FE_ATSC:
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mp_msg(MSGT_DEMUX, MSGL_V, "TUNER TYPE SEEMS TO BE DVB-ATSC\n");
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return TUNER_ATSC;
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#endif
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default:
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mp_msg(MSGT_DEMUX, MSGL_ERR, "UNKNOWN TUNER TYPE\n");
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return 0;
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}
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}
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int dvb_open_devices(dvb_priv_t *priv, int n, int demux_cnt)
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{
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int i;
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char frontend_dev[32], dvr_dev[32], demux_dev[32];
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sprintf(frontend_dev, "/dev/dvb/adapter%d/frontend0", n);
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sprintf(dvr_dev, "/dev/dvb/adapter%d/dvr0", n);
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sprintf(demux_dev, "/dev/dvb/adapter%d/demux0", n);
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priv->fe_fd = open(frontend_dev, O_RDWR | O_NONBLOCK | O_CLOEXEC);
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if(priv->fe_fd < 0)
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{
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mp_msg(MSGT_DEMUX, MSGL_ERR, "ERROR OPENING FRONTEND DEVICE %s: ERRNO %d\n", frontend_dev, errno);
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return 0;
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}
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priv->demux_fds_cnt = 0;
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mp_msg(MSGT_DEMUX, MSGL_V, "DVB_OPEN_DEVICES(%d)\n", demux_cnt);
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for(i = 0; i < demux_cnt; i++)
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{
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priv->demux_fds[i] = open(demux_dev, O_RDWR | O_NONBLOCK | O_CLOEXEC);
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if(priv->demux_fds[i] < 0)
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{
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mp_msg(MSGT_DEMUX, MSGL_ERR, "ERROR OPENING DEMUX 0: %d\n", errno);
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return 0;
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}
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else
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{
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mp_msg(MSGT_DEMUX, MSGL_V, "OPEN(%d), file %s: FD=%d, CNT=%d\n", i, demux_dev, priv->demux_fds[i], priv->demux_fds_cnt);
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priv->demux_fds_cnt++;
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}
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}
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priv->dvr_fd = open(dvr_dev, O_RDONLY| O_NONBLOCK | O_CLOEXEC);
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if(priv->dvr_fd < 0)
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{
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mp_msg(MSGT_DEMUX, MSGL_ERR, "ERROR OPENING DVR DEVICE %s: %d\n", dvr_dev, errno);
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return 0;
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}
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return 1;
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}
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int dvb_fix_demuxes(dvb_priv_t *priv, int cnt)
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{
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int i;
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char demux_dev[32];
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sprintf(demux_dev, "/dev/dvb/adapter%d/demux0", priv->card);
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mp_msg(MSGT_DEMUX, MSGL_V, "FIX %d -> %d\n", priv->demux_fds_cnt, cnt);
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if(priv->demux_fds_cnt >= cnt)
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{
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for(i = priv->demux_fds_cnt-1; i >= cnt; i--)
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{
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mp_msg(MSGT_DEMUX, MSGL_V, "FIX, CLOSE fd(%d): %d\n", i, priv->demux_fds[i]);
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close(priv->demux_fds[i]);
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}
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priv->demux_fds_cnt = cnt;
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}
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else if(priv->demux_fds_cnt < cnt)
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{
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for(i = priv->demux_fds_cnt; i < cnt; i++)
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{
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priv->demux_fds[i] = open(demux_dev, O_RDWR | O_NONBLOCK | O_CLOEXEC);
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mp_msg(MSGT_DEMUX, MSGL_V, "FIX, OPEN fd(%d): %d\n", i, priv->demux_fds[i]);
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if(priv->demux_fds[i] < 0)
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{
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mp_msg(MSGT_DEMUX, MSGL_ERR, "ERROR OPENING DEMUX 0: %d\n", errno);
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return 0;
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}
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else
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priv->demux_fds_cnt++;
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}
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}
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return 1;
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}
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int dvb_set_ts_filt(int fd, uint16_t pid, dmx_pes_type_t pestype)
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{
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int i;
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struct dmx_pes_filter_params pesFilterParams;
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pesFilterParams.pid = pid;
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pesFilterParams.input = DMX_IN_FRONTEND;
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pesFilterParams.output = DMX_OUT_TS_TAP;
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pesFilterParams.pes_type = pestype;
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pesFilterParams.flags = DMX_IMMEDIATE_START;
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errno = 0;
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if ((i = ioctl(fd, DMX_SET_PES_FILTER, &pesFilterParams)) < 0)
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{
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mp_msg(MSGT_DEMUX, MSGL_ERR, "ERROR IN SETTING DMX_FILTER %i for fd %d: ERRNO: %d", pid, fd, errno);
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return 0;
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}
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mp_msg(MSGT_DEMUX, MSGL_V, "SET PES FILTER ON PID %d to fd %d, RESULT: %d, ERRNO: %d\n", pid, fd, i, errno);
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return 1;
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}
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int dvb_demux_stop(int fd)
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{
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int i;
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i = ioctl(fd, DMX_STOP);
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mp_msg(MSGT_DEMUX, MSGL_DBG2, "STOPPING FD: %d, RESULT: %d\n", fd, i);
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return i == 0;
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}
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int dvb_demux_start(int fd)
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{
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int i;
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i = ioctl(fd, DMX_START);
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mp_msg(MSGT_DEMUX, MSGL_DBG2, "STARTING FD: %d, RESULT: %d\n", fd, i);
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return i == 0;
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}
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static void print_status(fe_status_t festatus)
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{
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mp_msg(MSGT_DEMUX, MSGL_V, "FE_STATUS:");
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if (festatus & FE_HAS_SIGNAL) mp_msg(MSGT_DEMUX, MSGL_V," FE_HAS_SIGNAL");
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if (festatus & FE_TIMEDOUT) mp_msg(MSGT_DEMUX, MSGL_V, " FE_TIMEDOUT");
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if (festatus & FE_HAS_LOCK) mp_msg(MSGT_DEMUX, MSGL_V, " FE_HAS_LOCK");
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if (festatus & FE_HAS_CARRIER) mp_msg(MSGT_DEMUX, MSGL_V, " FE_HAS_CARRIER");
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if (festatus & FE_HAS_VITERBI) mp_msg(MSGT_DEMUX, MSGL_V, " FE_HAS_VITERBI");
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if (festatus & FE_HAS_SYNC) mp_msg(MSGT_DEMUX, MSGL_V, " FE_HAS_SYNC");
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mp_msg(MSGT_DEMUX, MSGL_V, "\n");
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}
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static int check_status(int fd_frontend, int tmout)
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{
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int32_t strength;
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fe_status_t festatus;
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struct pollfd pfd[1];
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int ok=0, locks=0;
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time_t tm1, tm2;
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pfd[0].fd = fd_frontend;
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pfd[0].events = POLLPRI;
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mp_msg(MSGT_DEMUX, MSGL_V, "Getting frontend status\n");
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tm1 = tm2 = time((time_t*) NULL);
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while(!ok)
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{
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festatus = 0;
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if(poll(pfd,1,tmout*1000) > 0)
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{
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if (pfd[0].revents & POLLPRI)
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{
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if(ioctl(fd_frontend, FE_READ_STATUS, &festatus) >= 0)
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if(festatus & FE_HAS_LOCK)
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locks++;
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}
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}
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usleep(10000);
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tm2 = time((time_t*) NULL);
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if((festatus & FE_TIMEDOUT) || (locks >= 2) || (tm2 - tm1 >= tmout))
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ok = 1;
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}
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if(festatus & FE_HAS_LOCK)
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{
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strength=0;
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if(ioctl(fd_frontend,FE_READ_BER,&strength) >= 0)
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mp_msg(MSGT_DEMUX, MSGL_V, "Bit error rate: %d\n",strength);
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strength=0;
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if(ioctl(fd_frontend,FE_READ_SIGNAL_STRENGTH,&strength) >= 0)
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mp_msg(MSGT_DEMUX, MSGL_V, "Signal strength: %d\n",strength);
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strength=0;
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if(ioctl(fd_frontend,FE_READ_SNR,&strength) >= 0)
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mp_msg(MSGT_DEMUX, MSGL_V, "SNR: %d\n",strength);
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strength=0;
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if(ioctl(fd_frontend,FE_READ_UNCORRECTED_BLOCKS,&strength) >= 0)
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mp_msg(MSGT_DEMUX, MSGL_V, "UNC: %d\n",strength);
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print_status(festatus);
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}
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else
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{
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mp_msg(MSGT_DEMUX, MSGL_ERR, "Not able to lock to the signal on the given frequency, timeout: %d\n", tmout);
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return -1;
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}
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return 0;
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}
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struct diseqc_cmd {
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struct dvb_diseqc_master_cmd cmd;
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uint32_t wait;
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};
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static int diseqc_send_msg(int fd, fe_sec_voltage_t v, struct diseqc_cmd *cmd,
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fe_sec_tone_mode_t t, fe_sec_mini_cmd_t b)
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{
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if(ioctl(fd, FE_SET_TONE, SEC_TONE_OFF) == -1)
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return -1;
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if(ioctl(fd, FE_SET_VOLTAGE, v) == -1)
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return -1;
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usleep(15 * 1000);
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if(ioctl(fd, FE_DISEQC_SEND_MASTER_CMD, &cmd->cmd) == -1)
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return -1;
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usleep(cmd->wait * 1000);
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usleep(15 * 1000);
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if(ioctl(fd, FE_DISEQC_SEND_BURST, b) == -1)
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return -1;
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usleep(15 * 1000);
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if(ioctl(fd, FE_SET_TONE, t) == -1)
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return -1;
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return 0;
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}
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/* digital satellite equipment control,
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* specification is available from http://www.eutelsat.com/
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*/
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static int do_diseqc(int secfd, int sat_no, int polv, int hi_lo)
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{
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struct diseqc_cmd cmd = { {{0xe0, 0x10, 0x38, 0xf0, 0x00, 0x00}, 4}, 0 };
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/* param: high nibble: reset bits, low nibble set bits,
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* bits are: option, position, polarizaion, band
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*/
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cmd.cmd.msg[3] =
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0xf0 | (((sat_no * 4) & 0x0f) | (hi_lo ? 1 : 0) | (polv ? 0 : 2));
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return diseqc_send_msg(secfd, polv ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18,
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&cmd, hi_lo ? SEC_TONE_ON : SEC_TONE_OFF,
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(sat_no / 4) % 2 ? SEC_MINI_B : SEC_MINI_A);
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}
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static int tune_it(int fd_frontend, int fd_sec, unsigned int freq, unsigned int srate, char pol, int tone,
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fe_spectral_inversion_t specInv, unsigned int diseqc, fe_modulation_t modulation, fe_code_rate_t HP_CodeRate,
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fe_transmit_mode_t TransmissionMode, fe_guard_interval_t guardInterval, fe_bandwidth_t bandwidth,
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fe_code_rate_t LP_CodeRate, fe_hierarchy_t hier, int timeout)
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{
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int hi_lo = 0, dfd;
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struct dvb_frontend_parameters feparams;
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struct dvb_frontend_info fe_info;
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mp_msg(MSGT_DEMUX, MSGL_V, "TUNE_IT, fd_frontend %d, fd_sec %d\nfreq %lu, srate %lu, pol %c, tone %i, specInv, diseqc %u, fe_modulation_t modulation,fe_code_rate_t HP_CodeRate, fe_transmit_mode_t TransmissionMode,fe_guard_interval_t guardInterval, fe_bandwidth_t bandwidth\n",
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fd_frontend, fd_sec, (long unsigned int)freq, (long unsigned int)srate, pol, tone, diseqc);
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memset(&feparams, 0, sizeof(feparams));
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if ( ioctl(fd_frontend,FE_GET_INFO, &fe_info) < 0)
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{
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mp_msg(MSGT_DEMUX, MSGL_FATAL, "FE_GET_INFO FAILED\n");
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return -1;
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}
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mp_msg(MSGT_DEMUX, MSGL_V, "Using DVB card \"%s\"\n", fe_info.name);
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switch(fe_info.type)
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{
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case FE_OFDM:
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if (freq < 1000000) freq*=1000UL;
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feparams.frequency=freq;
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feparams.inversion=specInv;
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feparams.u.ofdm.bandwidth=bandwidth;
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feparams.u.ofdm.code_rate_HP=HP_CodeRate;
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feparams.u.ofdm.code_rate_LP=LP_CodeRate;
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feparams.u.ofdm.constellation=modulation;
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feparams.u.ofdm.transmission_mode=TransmissionMode;
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feparams.u.ofdm.guard_interval=guardInterval;
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feparams.u.ofdm.hierarchy_information=hier;
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mp_msg(MSGT_DEMUX, MSGL_V, "tuning DVB-T to %d Hz, bandwidth: %d\n",freq, bandwidth);
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break;
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case FE_QPSK:
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if (freq > 2200000)
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{
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// this must be an absolute frequency
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if (freq < SLOF)
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{
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freq = feparams.frequency=(freq-LOF1);
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hi_lo = 0;
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}
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else
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{
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freq = feparams.frequency=(freq-LOF2);
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hi_lo = 1;
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}
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}
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else
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{
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// this is an L-Band frequency
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feparams.frequency=freq;
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}
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feparams.inversion=specInv;
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feparams.u.qpsk.symbol_rate=srate;
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feparams.u.qpsk.fec_inner=HP_CodeRate;
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dfd = fd_frontend;
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mp_msg(MSGT_DEMUX, MSGL_V, "tuning DVB-S to Freq: %u, Pol: %c Srate: %d, 22kHz: %s, LNB: %d\n",freq,pol,srate,hi_lo ? "on" : "off", diseqc);
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if(do_diseqc(dfd, diseqc, (pol == 'V' ? 1 : 0), hi_lo) == 0)
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mp_msg(MSGT_DEMUX, MSGL_V, "DISEQC SETTING SUCCEDED\n");
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else
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{
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mp_msg(MSGT_DEMUX, MSGL_ERR, "DISEQC SETTING FAILED\n");
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return -1;
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}
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break;
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case FE_QAM:
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mp_msg(MSGT_DEMUX, MSGL_V, "tuning DVB-C to %d, srate=%d\n",freq,srate);
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feparams.frequency=freq;
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feparams.inversion=specInv;
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feparams.u.qam.symbol_rate = srate;
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feparams.u.qam.fec_inner = HP_CodeRate;
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feparams.u.qam.modulation = modulation;
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break;
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#ifdef DVB_ATSC
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case FE_ATSC:
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mp_msg(MSGT_DEMUX, MSGL_V, "tuning ATSC to %d, modulation=%d\n",freq,modulation);
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feparams.frequency=freq;
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feparams.u.vsb.modulation = modulation;
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break;
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#endif
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default:
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mp_msg(MSGT_DEMUX, MSGL_V, "Unknown FE type. Aborting\n");
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return 0;
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}
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usleep(100000);
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if(ioctl(fd_frontend,FE_SET_FRONTEND,&feparams) < 0)
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{
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mp_msg(MSGT_DEMUX, MSGL_ERR, "ERROR tuning channel\n");
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return -1;
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}
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return check_status(fd_frontend, timeout);
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}
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int dvb_tune(dvb_priv_t *priv, int freq, char pol, int srate, int diseqc, int tone,
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fe_spectral_inversion_t specInv, fe_modulation_t modulation, fe_guard_interval_t guardInterval,
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fe_transmit_mode_t TransmissionMode, fe_bandwidth_t bandWidth, fe_code_rate_t HP_CodeRate,
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fe_code_rate_t LP_CodeRate, fe_hierarchy_t hier, int timeout)
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{
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int ris;
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mp_msg(MSGT_DEMUX, MSGL_INFO, "dvb_tune Freq: %lu\n", (long unsigned int) freq);
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ris = tune_it(priv->fe_fd, priv->sec_fd, freq, srate, pol, tone, specInv, diseqc, modulation, HP_CodeRate, TransmissionMode, guardInterval, bandWidth, LP_CodeRate, hier, timeout);
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if(ris != 0)
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mp_msg(MSGT_DEMUX, MSGL_INFO, "dvb_tune, TUNING FAILED\n");
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return ris == 0;
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}
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