dvb.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:10k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * dvb.c : DVB channel list import (szap/tzap/czap compatible channel lists)
- *****************************************************************************
- * Copyright (C) 2005 the VideoLAN team
- * $Id: 7c36a796f23eace157e9f88c8fe280341f52562a $
- *
- * Authors: Gildas Bazin <gbazin@videolan.org>
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <vlc_common.h>
- #include <vlc_demux.h>
- #include <vlc_interface.h>
- #include <vlc_charset.h>
- #include "playlist.h"
- #ifndef LONG_MAX
- # define LONG_MAX 2147483647L
- # define LONG_MIN (-LONG_MAX-1)
- #endif
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static int Demux( demux_t *p_demux);
- static int Control( demux_t *p_demux, int i_query, va_list args );
- static int ParseLine( char *, char **, char ***, int *);
- /*****************************************************************************
- * Import_DVB: main import function
- *****************************************************************************/
- int Import_DVB( vlc_object_t *p_this )
- {
- demux_t *p_demux = (demux_t *)p_this;
- const uint8_t *p_peek;
- int i_peek;
- bool b_valid = false;
- if( !demux_IsPathExtension( p_demux, ".conf" ) && !p_demux->b_force )
- return VLC_EGENERIC;
- /* Check if this really is a channels file */
- if( (i_peek = stream_Peek( p_demux->s, &p_peek, 1024 )) > 0 )
- {
- char psz_line[1024+1];
- int i;
- for( i = 0; i < i_peek; i++ )
- {
- if( p_peek[i] == 'n' ) break;
- psz_line[i] = p_peek[i];
- }
- psz_line[i] = 0;
- if( ParseLine( psz_line, 0, 0, 0 ) ) b_valid = true;
- }
- if( !b_valid ) return VLC_EGENERIC;
- msg_Dbg( p_demux, "found valid DVB conf playlist file");
- p_demux->pf_control = Control;
- p_demux->pf_demux = Demux;
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Deactivate: frees unused data
- *****************************************************************************/
- void Close_DVB( vlc_object_t *p_this )
- {
- VLC_UNUSED(p_this);
- }
- /*****************************************************************************
- * Demux: The important stuff
- *****************************************************************************/
- static int Demux( demux_t *p_demux )
- {
- char *psz_line;
- input_item_t *p_input;
- INIT_PLAYLIST_STUFF;
- while( (psz_line = stream_ReadLine( p_demux->s )) )
- {
- char **ppsz_options = NULL;
- int i_options = 0;
- char *psz_name = NULL;
- if( !ParseLine( psz_line, &psz_name, &ppsz_options, &i_options ) )
- {
- free( psz_line );
- continue;
- }
- EnsureUTF8( psz_name );
- for( int i = 0; i< i_options; i++ )
- EnsureUTF8( ppsz_options[i] );
- p_input = input_item_NewExt( p_demux, "dvb://", psz_name,
- i_options, (const char**)ppsz_options, VLC_INPUT_OPTION_TRUSTED, -1 );
- input_item_AddSubItem( p_current_input, p_input );
- vlc_gc_decref( p_input );
- while( i_options-- )
- free( ppsz_options[i_options] );
- free( ppsz_options );
- free( psz_line );
- }
- HANDLE_PLAY_AND_RELEASE;
- return 0; /* Needed for correct operation of go back */
- }
- static const struct
- {
- const char *psz_name;
- const char *psz_option;
- } dvb_options[] =
- {
- { "INVERSION_OFF", "dvb-inversion=0" },
- { "INVERSION_ON", "dvb-inversion=1" },
- { "INVERSION_AUTO", "dvb-inversion=2" },
- { "BANDWIDTH_AUTO", "dvb-bandwidth=0" },
- { "BANDWIDTH_6_MHZ", "dvb-bandwidth=6" },
- { "BANDWIDTH_7_MHZ", "dvb-bandwidth=7" },
- { "BANDWIDTH_8_MHZ", "dvb-bandwidth=8" },
- { "FEC_NONE", "dvb-fec=0" },
- { "FEC_1_2", "dvb-fec=1" },
- { "FEC_2_3", "dvb-fec=2" },
- { "FEC_3_4", "dvb-fec=3" },
- { "FEC_4_5", "dvb-fec=4" },
- { "FEC_5_6", "dvb-fec=5" },
- { "FEC_6_7", "dvb-fec=6" },
- { "FEC_7_8", "dvb-fec=7" },
- { "FEC_8_9", "dvb-fec=8" },
- { "FEC_AUTO", "dvb-fec=9" },
- { "GUARD_INTERVAL_AUTO", "dvb-guard=0" },
- { "GUARD_INTERVAL_1_4", "dvb-guard=4" },
- { "GUARD_INTERVAL_1_8", "dvb-guard=8" },
- { "GUARD_INTERVAL_1_16", "dvb-guard=16" },
- { "GUARD_INTERVAL_1_32", "dvb-guard=32" },
- { "HIERARCHY_NONE", "dvb-hierarchy=-1" },
- { "HIERARCHY_1", "dvb-hierarchy=1" },
- { "HIERARCHY_2", "dvb-hierarchy=2" },
- { "HIERARCHY_4", "dvb-hierarchy=4" },
- { "QPSK", "dvb-modulation=-1" },
- { "QAM_AUTO", "dvb-modulation=0" },
- { "QAM_16", "dvb-modulation=16" },
- { "QAM_32", "dvb-modulation=32" },
- { "QAM_64", "dvb-modulation=64" },
- { "QAM_128", "dvb-modulation=128" },
- { "QAM_256", "dvb-modulation=256" },
- { "8VSB", "dvb-modulation=8" },
- { "16VSB", "dvb-modulation=16" },
- { "TRANSMISSION_MODE_AUTO", "dvb-transmission=0" },
- { "TRANSMISSION_MODE_2K", "dvb-transmission=2" },
- { "TRANSMISSION_MODE_8K", "dvb-transmission=8" },
- { 0, 0 }
- };
- static int ParseLine( char *psz_line, char **ppsz_name,
- char ***pppsz_options, int *pi_options )
- {
- char *psz_name = NULL, *psz_parse = psz_line;
- int i_count = 0, i_program = 0, i_frequency = 0, i_symbolrate = 0;
- bool b_valid = false;
- if( pppsz_options ) *pppsz_options = NULL;
- if( pi_options ) *pi_options = 0;
- if( ppsz_name ) *ppsz_name = NULL;
- /* Skip leading tabs and spaces */
- while( *psz_parse == ' ' || *psz_parse == 't' ||
- *psz_parse == 'n' || *psz_parse == 'r' ) psz_parse++;
- /* Ignore comments */
- if( *psz_parse == '#' ) return false;
- while( psz_parse )
- {
- const char *psz_option = NULL;
- char *psz_end = strchr( psz_parse, ':' );
- if( psz_end ) { *psz_end = 0; psz_end++; }
- if( i_count == 0 )
- {
- /* Channel name */
- psz_name = psz_parse;
- }
- else if( i_count == 1 )
- {
- /* Frequency */
- char *psz_end;
- long i_value;
- i_value = strtol( psz_parse, &psz_end, 10 );
- if( psz_end == psz_parse ||
- i_value == LONG_MAX || i_value == LONG_MIN ) break;
- i_frequency = i_value;
- }
- else
- {
- int i;
- /* Check option name with our list */
- for( i = 0; dvb_options[i].psz_name; i++ )
- {
- if( !strcmp( psz_parse, dvb_options[i].psz_name ) )
- {
- psz_option = dvb_options[i].psz_option;
- /* If we recognize one of the strings, then we are sure
- * the data is really valid (ie. a channels file). */
- b_valid = true;
- break;
- }
- }
- if( !psz_option )
- {
- /* Option not recognized, test if it is a number */
- char *psz_end;
- long i_value;
- i_value = strtol( psz_parse, &psz_end, 10 );
- if( psz_end != psz_parse &&
- i_value != LONG_MAX && i_value != LONG_MIN &&
- !i_symbolrate )
- {
- i_symbolrate = i_value;
- }
- else if( psz_end != psz_parse &&
- i_value != LONG_MAX && i_value != LONG_MIN )
- {
- i_program = i_value;
- }
- }
- }
- if( psz_option && pppsz_options && pi_options )
- {
- char *psz_dup = strdup( psz_option );
- if (psz_dup != NULL)
- INSERT_ELEM( *pppsz_options, (*pi_options), (*pi_options),
- psz_dup );
- }
- psz_parse = psz_end;
- i_count++;
- }
- if( !b_valid && pppsz_options && pi_options )
- {
- /* This isn't a valid channels file, cleanup everything */
- while( (*pi_options)-- ) free( (*pppsz_options)[*pi_options] );
- free( *pppsz_options );
- *pppsz_options = NULL; *pi_options = 0;
- }
- if( i_program && pppsz_options && pi_options )
- {
- char *psz_option;
- if( asprintf( &psz_option, "program=%i", i_program ) != -1 )
- INSERT_ELEM( *pppsz_options, (*pi_options), (*pi_options),
- psz_option );
- }
- if( i_frequency && pppsz_options && pi_options )
- {
- char *psz_option;
- if( asprintf( &psz_option, "dvb-frequency=%i", i_frequency ) != -1 )
- INSERT_ELEM( *pppsz_options, (*pi_options), (*pi_options),
- psz_option );
- }
- if( i_symbolrate && pppsz_options && pi_options )
- {
- char *psz_option;
- if( asprintf( &psz_option, "dvb-srate=%i", i_symbolrate ) != -1 )
- INSERT_ELEM( *pppsz_options, (*pi_options), (*pi_options),
- psz_option );
- }
- if( ppsz_name && psz_name ) *ppsz_name = strdup( psz_name );
- return b_valid;
- }
- static int Control( demux_t *p_demux, int i_query, va_list args )
- {
- VLC_UNUSED(p_demux); VLC_UNUSED(i_query); VLC_UNUSED(args);
- return VLC_EGENERIC;
- }