access.c
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上传日期:2009-03-27
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- /*****************************************************************************
- * access.c: Satellite card input
- *****************************************************************************
- * Copyright (C) 1998-2003 VideoLAN
- *
- * Authors: Johan Bilien <jobi@via.ecp.fr>
- * Christophe Massiot <massiot@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.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #include <stdio.h>
- #include <stdlib.h>
- #include <vlc/vlc.h>
- #include <vlc/input.h>
- #include "../../demux/mpeg/system.h"
- #ifdef HAVE_UNISTD_H
- # include <unistd.h>
- #endif
- #include <fcntl.h>
- #include <sys/types.h>
- #include <string.h>
- #include <errno.h>
- #ifdef STRNCASECMP_IN_STRINGS_H
- # include <strings.h>
- #endif
- #include "dvb.h"
- /* These are for the Dreambox port. I have no idea whether they're correct
- * for other DVB adapters. --Meuuh */
- #define SATELLITE_READ_ONCE (64 * 1024)
- #define DMX_BUFFER_SIZE (1024 * 1024)
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static ssize_t SatelliteRead( input_thread_t * p_input, byte_t * p_buffer,
- size_t i_len );
- static int SatelliteSetArea ( input_thread_t *, input_area_t * );
- static int SatelliteSetProgram ( input_thread_t *, pgrm_descriptor_t * );
- static void SatelliteSeek ( input_thread_t *, off_t );
- typedef struct demux_handle_t
- {
- int i_pid;
- int i_handle;
- int i_type;
- } demux_handle_t;
- #define PAT_TYPE 1
- #define PMT_TYPE 2
- #define ES_TYPE 3
- #define MAX_DEMUX 8
- typedef struct thread_sat_data_t
- {
- int i_handle;
- demux_handle_t p_demux_handles[MAX_DEMUX];
- } thread_sat_data_t;
- static void AllocateDemux( input_thread_t * p_input, int i_pid,
- int i_type )
- {
- thread_sat_data_t * p_satellite = (thread_sat_data_t *)p_input->p_access_data;
- int i_demux;
- int i;
- i_demux = config_GetInt( p_input, "dvb-dmx" );
- /* Find first free slot */
- for ( i = 0; i < MAX_DEMUX; i++ )
- {
- if ( !p_satellite->p_demux_handles[i].i_type )
- {
- if (ioctl_SetDMXFilter( i_demux, i_pid, &p_satellite->p_demux_handles[i].i_handle, 3) < 0)
- {
- msg_Warn(p_input, "ioctl_SetDMXFilter failed (%d)", i_pid);
- break;
- }
- p_satellite->p_demux_handles[i].i_type = i_type;
- p_satellite->p_demux_handles[i].i_pid = i_pid;
- break;
- }
- }
- }
- static void CloseProgram( input_thread_t * p_input )
- {
- thread_sat_data_t * p_satellite = (thread_sat_data_t *)p_input->p_access_data;
- int i;
- for ( i = 1; i < MAX_DEMUX; i++ )
- {
- if ( p_satellite->p_demux_handles[i].i_type )
- {
- ioctl_UnsetDMXFilter( p_satellite->p_demux_handles[i].i_handle );
- p_satellite->p_demux_handles[i].i_type = 0;
- }
- }
- }
- /*****************************************************************************
- * Open: open the dvr device
- *****************************************************************************/
- int E_(Open) ( vlc_object_t *p_this )
- {
- input_thread_t * p_input = (input_thread_t *)p_this;
- thread_sat_data_t * p_satellite;
- char * psz_parser;
- char * psz_next;
- int i_freq = 0;
- int i_srate = 0;
- vlc_bool_t b_pol = 0;
- int i_fec = 0;
- float f_fec = 1./2;
- vlc_bool_t b_diseqc;
- int i_lnb_lof1;
- int i_lnb_lof2;
- int i_lnb_slof;
- int i_demux;
- char psz_dvr[255];
- i_demux = config_GetInt( p_input, "dvb-dmx" );
- snprintf(psz_dvr, sizeof(psz_dvr), DVR "%d", i_demux);
- /* parse the options passed in command line : */
- psz_parser = strdup( p_input->psz_name );
- if( !psz_parser )
- {
- return( -1 );
- }
- p_input->pf_read = SatelliteRead;
- p_input->pf_set_program = SatelliteSetProgram;
- p_input->pf_set_area = SatelliteSetArea;
- p_input->pf_seek = SatelliteSeek;
- i_freq = (int)strtol( psz_parser, &psz_next, 10 );
- if( *psz_next )
- {
- psz_parser = psz_next + 1;
- b_pol = (vlc_bool_t)strtol( psz_parser, &psz_next, 10 );
- if( *psz_next )
- {
- psz_parser = psz_next + 1;
- i_fec = (int)strtol( psz_parser, &psz_next, 10 );
- if( *psz_next )
- {
- psz_parser = psz_next + 1;
- i_srate = (int)strtol( psz_parser, &psz_next, 10 );
- }
- }
- }
- if( i_freq > (12999*1000) || i_freq < (10000*1000) )
- {
- msg_Warn( p_input, "invalid frequency, using default one" );
- i_freq = config_GetInt( p_input, "frequency" );
- if( i_freq && (i_freq > (12999*1000) || i_freq < (10000*1000)) )
- {
- msg_Err( p_input, "invalid default frequency" );
- return -1;
- }
- }
- if( i_freq && (i_srate > (30000*1000) || i_srate < (1000*1000)) )
- {
- msg_Warn( p_input, "invalid symbol rate, using default one" );
- i_srate = config_GetInt( p_input, "symbol-rate" );
- if( i_srate > (30000*1000) || i_srate < (1000*1000) )
- {
- msg_Err( p_input, "invalid default symbol rate" );
- return -1;
- }
- }
- if( i_freq && b_pol && b_pol != 1 )
- {
- msg_Warn( p_input, "invalid polarization, using default one" );
- b_pol = config_GetInt( p_input, "polarization" );
- if( b_pol && b_pol != 1 )
- {
- msg_Err( p_input, "invalid default polarization" );
- return -1;
- }
- }
- if( i_freq && (i_fec > 7 || i_fec < 1) )
- {
- msg_Warn( p_input, "invalid FEC, using default one" );
- i_fec = config_GetInt( p_input, "fec" );
- if( i_fec > 7 || i_fec < 1 )
- {
- msg_Err( p_input, "invalid default FEC" );
- return -1;
- }
- }
- if ( i_freq )
- {
- switch( i_fec )
- {
- case 1:
- f_fec = 1./2;
- break;
- case 2:
- f_fec = 2./3;
- break;
- case 3:
- f_fec = 3./4;
- break;
- case 4:
- f_fec = 4./5;
- break;
- case 5:
- f_fec = 5./6;
- break;
- case 6:
- f_fec = 6./7;
- break;
- case 7:
- f_fec = 7./8;
- break;
- default:
- /* cannot happen */
- break;
- }
- }
- /* Initialise structure */
- p_satellite = malloc( sizeof( thread_sat_data_t ) );
- if( p_satellite == NULL )
- {
- msg_Err( p_input, "out of memory" );
- return -1;
- }
- memset( p_satellite, 0, sizeof( thread_sat_data_t ) );
- p_input->p_access_data = (void *)p_satellite;
- /* Open the DVR device */
- msg_Dbg( p_input, "opening DVR device `%s'", psz_dvr );
- if( (p_satellite->i_handle = open( psz_dvr,
- /*O_NONBLOCK | O_LARGEFILE*/0 )) == (-1) )
- {
- msg_Warn( p_input, "cannot open `%s' (%s)", psz_dvr, strerror(errno) );
- free( p_satellite );
- return -1;
- }
- /* FIXME : this is from the Dreambox port. I have no idea whether it
- * hurts or helps other DVB interfaces, so I just leave it here.
- * Feel free to remove it if it breaks. --Meuuh */
- ioctl_SetBufferSize( p_satellite->i_handle, DMX_BUFFER_SIZE );
- /* Get antenna configuration options */
- b_diseqc = config_GetInt( p_input, "diseqc" );
- i_lnb_lof1 = config_GetInt( p_input, "lnb-lof1" );
- i_lnb_lof2 = config_GetInt( p_input, "lnb-lof2" );
- i_lnb_slof = config_GetInt( p_input, "lnb-slof" );
- /* Initialize the Satellite Card */
- if ( i_freq )
- {
- int i_tuner = config_GetInt( p_input, "dvb-tuner" );
- msg_Dbg( p_input, "initializing Sat Card with Freq: %d, Pol: %d, "
- "FEC: %03f, Srate: %d", i_freq, b_pol, f_fec, i_srate );
- if ( ioctl_SECControl( i_tuner, i_freq, b_pol, i_lnb_slof, b_diseqc ) < 0 )
- {
- msg_Err( p_input, "an error occurred when controling SEC" );
- close( p_satellite->i_handle );
- free( p_satellite );
- return -1;
- }
- msg_Dbg( p_input, "initializing frontend device" );
- switch (ioctl_SetQPSKFrontend ( i_tuner, i_freq, i_srate, f_fec,
- i_lnb_lof1, i_lnb_lof2, i_lnb_slof))
- {
- case -2:
- msg_Err( p_input, "frontend returned an unexpected event" );
- close( p_satellite->i_handle );
- free( p_satellite );
- return -1;
- break;
- case -3:
- msg_Err( p_input, "frontend returned no event" );
- close( p_satellite->i_handle );
- free( p_satellite );
- return -1;
- break;
- case -4:
- msg_Err( p_input, "frontend: timeout when polling for event" );
- close( p_satellite->i_handle );
- free( p_satellite );
- return -1;
- break;
- case -5:
- msg_Err( p_input, "an error occured when polling frontend device" );
- close( p_satellite->i_handle );
- free( p_satellite );
- return -1;
- break;
- case -1:
- msg_Err( p_input, "frontend returned a failure event" );
- close( p_satellite->i_handle );
- free( p_satellite );
- return -1;
- break;
- default:
- break;
- }
- } /* i_freq */
- msg_Dbg( p_input, "setting filter on PAT" );
- AllocateDemux( p_input, 0, PAT_TYPE );
- if( input_InitStream( p_input, sizeof( stream_ts_data_t ) ) == -1 )
- {
- msg_Err( p_input, "could not initialize stream structure" );
- close( p_satellite->i_handle );
- free( p_satellite );
- return( -1 );
- }
- vlc_mutex_lock( &p_input->stream.stream_lock );
- p_input->stream.b_pace_control = 1;
- p_input->stream.b_seekable = 0;
- p_input->stream.p_selected_area->i_tell = 0;
- vlc_mutex_unlock( &p_input->stream.stream_lock );
- p_input->i_mtu = SATELLITE_READ_ONCE;
- p_input->stream.i_method = INPUT_METHOD_SATELLITE;
- return 0;
- }
- /*****************************************************************************
- * Close : Close the device
- *****************************************************************************/
- void E_(Close) ( vlc_object_t *p_this )
- {
- input_thread_t * p_input = (input_thread_t *)p_this;
- thread_sat_data_t * p_satellite = (thread_sat_data_t *)p_input->p_access_data;
- msg_Dbg( p_input, "unsetting filters on all pids" );
- CloseProgram( p_input );
- close( p_satellite->p_demux_handles[0].i_handle );
- close( p_satellite->i_handle );
- }
- /*****************************************************************************
- * SatelliteRead: reads data from the satellite card
- *****************************************************************************/
- static ssize_t SatelliteRead( input_thread_t * p_input, byte_t * p_buffer,
- size_t i_len )
- {
- thread_sat_data_t * p_satellite = (thread_sat_data_t *)p_input->p_access_data;
- ssize_t i_ret;
- unsigned int i;
- /* if not set, set filters to the PMTs */
- /* This is kludgy and consumes way too much CPU power - the access
- * module should have a callback from the demux when a new program
- * is encountered. --Meuuh */
- if ( !p_satellite->p_demux_handles[1].i_type )
- {
- int i_program = config_GetInt( p_input, "program" );
- for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
- {
- /* Only set a filter on the selected program : some boards
- * (read: Dreambox) only have 8 filters, so you don't want to
- * spend them on unwanted PMTs. --Meuuh */
- if ( (!i_program || p_input->stream.pp_programs[i]->i_number == i_program) )
- {
- msg_Dbg( p_input, "setting filter on PMT pid %d",
- p_input->stream.pp_programs[i]->pp_es[0]->i_id );
- AllocateDemux( p_input, p_input->stream.pp_programs[i]->pp_es[0]->i_id, PMT_TYPE );
- }
- }
- }
- i_ret = read( p_satellite->i_handle, p_buffer, i_len );
-
- if( i_ret < 0 )
- {
- # ifdef HAVE_ERRNO_H
- msg_Err( p_input, "read failed (%s)", strerror(errno) );
- # else
- msg_Err( p_input, "read failed" );
- # endif
- }
-
- return i_ret;
- }
- /*****************************************************************************
- * SatelliteSetArea : Does nothing
- *****************************************************************************/
- static int SatelliteSetArea( input_thread_t * p_input, input_area_t * p_area )
- {
- return -1;
- }
- /*****************************************************************************
- * SatelliteSetProgram : Sets the card filters according to the
- * selected program,
- * and makes the appropriate changes to stream structure.
- *****************************************************************************/
- int SatelliteSetProgram( input_thread_t * p_input,
- pgrm_descriptor_t * p_new_prg )
- {
- unsigned int i_es_index;
- vlc_value_t val;
- if ( p_input->stream.p_selected_program )
- {
- for ( i_es_index = 0 ; /* 0 should be the PMT */
- i_es_index < p_input->stream.p_selected_program->
- i_es_number ;
- i_es_index ++ )
- {
- #define p_es p_input->stream.p_selected_program->pp_es[i_es_index]
- if ( p_es->p_dec )
- {
- input_UnselectES( p_input , p_es );
- }
- #undef p_es
- }
- }
- msg_Dbg( p_input, "unsetting filters on all pids" );
- CloseProgram( p_input );
- msg_Dbg( p_input, "setting filter on PMT pid %d",
- p_new_prg->pp_es[0]->i_id );
- AllocateDemux( p_input, p_new_prg->pp_es[0]->i_id, PMT_TYPE );
- for ( i_es_index = 1 ; i_es_index < p_new_prg->i_es_number ; i_es_index ++ )
- {
- #define p_es p_new_prg->pp_es[i_es_index]
- switch( p_es->i_cat )
- {
- case VIDEO_ES:
- msg_Dbg(p_input, "setting filter on video ES 0x%x",
- p_es->i_id);
- /* Always set the filter. This may seem a little odd, but
- * it allows you to stream the video with demuxstream
- * without having a decoder or a stream output behind.
- * The result is you'll sometimes filter a PID which you
- * don't really want, but in the most common cases it
- * should be OK. --Meuuh */
- AllocateDemux( p_input, p_es->i_id, ES_TYPE );
- input_SelectES( p_input , p_es );
- break;
- case AUDIO_ES:
- msg_Dbg(p_input, "setting filter on audio ES 0x%x",
- p_es->i_id);
- AllocateDemux( p_input, p_es->i_id, ES_TYPE );
- input_SelectES( p_input , p_es );
- break;
- default:
- /* Do not select private streams. This is to avoid the
- * limit of 8 filters on the Dreambox and possibly on
- * other boards. We should probably change that to
- * have the DVB subtitles, but filtering all private
- * streams including DVB tables and padding seems
- * nonsense to me. --Meuuh */
- #if 0
- msg_Dbg(p_input, "setting filter on misc (0x%x) ES 0x%x",
- p_es->i_cat,
- p_es->i_id);
- AllocateDemux( p_input, p_es->i_id, ES_TYPE );
- input_SelectES( p_input , p_es );
- #endif
- break;
- #undef p_es
- }
- }
- p_input->stream.p_selected_program = p_new_prg;
- /* Update the navigation variables without triggering a callback */
- val.i_int = p_new_prg->i_number;
- var_Change( p_input, "program", VLC_VAR_SETVALUE, &val, NULL );
- return 0;
- }
- /*****************************************************************************
- * SatelliteSeek: does nothing (not a seekable stream
- *****************************************************************************/
- static void SatelliteSeek( input_thread_t * p_input, off_t i_off )
- {
- ;
- }