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https://code.videolan.org/videolan/vlc
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f11b9a96dd
*Added checks in dvd_ifo *Cleanings in gnome interface : the interface should be dependant on the input method.
276 lines
8.7 KiB
C
276 lines
8.7 KiB
C
/*****************************************************************************
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* input_ts.c: TS demux and netlist management
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*****************************************************************************
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* Copyright (C) 1998, 1999, 2000 VideoLAN
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* $Id: input_ts.c,v 1.14 2001/04/13 05:36:12 stef Exp $
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*
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* Authors: Henri Fallon <henri@videolan.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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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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*
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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, USA.
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*****************************************************************************/
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#define MODULE_NAME ts
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#include "modules_inner.h"
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#include "defs.h"
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#ifdef SYS_NTO
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#include <sys/select.h>
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#endif
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#include <sys/uio.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include "config.h"
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#include "common.h"
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#include "threads.h"
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#include "mtime.h"
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#include "tests.h"
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#include "modules.h"
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#include "intf_msg.h"
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#include "stream_control.h"
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#include "input_ext-intf.h"
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#include "input_ext-dec.h"
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#include "input.h"
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#include "input_ts.h"
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#include "mpeg_system.h"
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#include "input_netlist.h"
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/*****************************************************************************
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* Local prototypes
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*****************************************************************************/
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static int TSProbe ( probedata_t * );
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static int TSRead ( struct input_thread_s *,
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data_packet_t * p_packets[INPUT_READ_ONCE] );
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static void TSInit ( struct input_thread_s * );
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static void TSEnd ( struct input_thread_s * );
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/*****************************************************************************
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* Functions exported as capabilities. They are declared as static so that
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* we don't pollute the namespace too much.
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*****************************************************************************/
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void _M( input_getfunctions )( function_list_t * p_function_list )
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{
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#define input p_function_list->functions.input
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p_function_list->pf_probe = TSProbe;
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input.pf_init = TSInit;
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#if !defined( SYS_BEOS ) && !defined( SYS_NTO )
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input.pf_open = input_NetworkOpen;
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input.pf_close = input_NetworkClose;
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#else
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input.pf_open = input_FileOpen;
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input.pf_close = input_FileClose;
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#endif
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input.pf_end = TSEnd;
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input.pf_set_area = NULL;
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input.pf_read = TSRead;
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input.pf_demux = input_DemuxTS;
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input.pf_new_packet = input_NetlistNewPacket;
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input.pf_new_pes = input_NetlistNewPES;
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input.pf_delete_packet = input_NetlistDeletePacket;
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input.pf_delete_pes = input_NetlistDeletePES;
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input.pf_rewind = NULL;
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input.pf_seek = NULL;
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#undef input
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}
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/*****************************************************************************
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* TSProbe: verifies that the stream is a TS stream
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*****************************************************************************/
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static int TSProbe( probedata_t * p_data )
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{
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input_thread_t * p_input = (input_thread_t *)p_data;
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char * psz_name = p_input->p_source;
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int i_handle;
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int i_score = 1;
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if( TestMethod( INPUT_METHOD_VAR, "ts" ) )
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{
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return( 999 );
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}
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if( ( strlen(psz_name) > 5 ) && !strncasecmp( psz_name, "file:", 5 ) )
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{
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/* If the user specified "file:" then it's probably a file */
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psz_name += 5;
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}
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i_handle = open( psz_name, 0 );
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if( i_handle == -1 )
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{
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return( 0 );
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}
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close( i_handle );
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return( i_score );
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}
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/*****************************************************************************
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* TSInit: initializes TS structures
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*****************************************************************************/
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static void TSInit( input_thread_t * p_input )
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{
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/* Initialize netlist and TS structures */
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thread_ts_data_t * p_method;
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es_descriptor_t * p_pat_es;
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es_ts_data_t * p_demux_data;
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stream_ts_data_t * p_stream_data;
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/* Initialise structure */
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p_method = malloc( sizeof( thread_ts_data_t ) );
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if( p_method == NULL )
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{
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intf_ErrMsg( "TS input : Out of memory" );
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p_input->b_error = 1;
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return;
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}
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p_input->p_plugin_data = (void *)p_method;
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p_input->p_method_data = NULL;
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/* Initialize netlist */
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if( input_NetlistInit( p_input, NB_DATA, NB_PES, TS_PACKET_SIZE,
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INPUT_READ_ONCE ) )
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{
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intf_ErrMsg( "TS input : Could not initialize netlist" );
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return;
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}
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/* Initialize the stream */
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input_InitStream( p_input, sizeof( stream_ts_data_t ) );
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/* input method type */
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/* FIXME: should test if you have network or file here */
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p_input->stream.i_method = INPUT_METHOD_NETWORK;
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/* Init */
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p_stream_data = (stream_ts_data_t *)p_input->stream.p_demux_data;
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p_stream_data->i_pat_version = PAT_UNINITIALIZED ;
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/* We'll have to catch the PAT in order to continue
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* Then the input will catch the PMT and then the others ES
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* The PAT es is indepedent of any program. */
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p_pat_es = input_AddES( p_input, NULL,
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0x00, sizeof( es_ts_data_t ) );
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p_demux_data=(es_ts_data_t *)p_pat_es->p_demux_data;
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p_demux_data->b_psi = 1;
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p_demux_data->i_psi_type = PSI_IS_PAT;
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p_demux_data->p_psi_section = malloc(sizeof(psi_section_t));
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p_demux_data->p_psi_section->b_is_complete = 1;
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}
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/*****************************************************************************
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* TSEnd: frees unused data
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*****************************************************************************/
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static void TSEnd( input_thread_t * p_input )
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{
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es_descriptor_t * p_pat_es;
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p_pat_es = input_FindES( p_input, 0x00 );
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if( p_pat_es != NULL )
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input_DelES( p_input, p_pat_es );
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free(p_input->p_plugin_data);
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}
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/*****************************************************************************
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* TSRead: reads data packets
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*****************************************************************************
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* Returns -1 in case of error, 0 if everything went well, and 1 in case of
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* EOF.
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*****************************************************************************/
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static int TSRead( input_thread_t * p_input,
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data_packet_t * pp_packets[INPUT_READ_ONCE] )
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{
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thread_ts_data_t * p_method;
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unsigned int i_read, i_loop;
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int i_data;
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struct iovec * p_iovec;
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struct timeval s_wait;
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/* Init */
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p_method = ( thread_ts_data_t * )p_input->p_plugin_data;
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/* Initialize file descriptor set */
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FD_ZERO( &(p_method->s_fdset) );
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FD_SET( p_input->i_handle, &(p_method->s_fdset) );
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/* We'll wait 0.5 second if nothing happens */
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s_wait.tv_sec = 0.5;
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s_wait.tv_usec = 0;
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/* Reset pointer table */
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memset( pp_packets, 0, INPUT_READ_ONCE*sizeof(data_packet_t *) );
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/* Get iovecs */
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p_iovec = input_NetlistGetiovec( p_input->p_method_data );
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if ( p_iovec == NULL )
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{
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return( -1 ); /* empty netlist */
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}
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/* Fill if some data is available */
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i_data = select(p_input->i_handle + 1, &(p_method->s_fdset), NULL, NULL,
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&s_wait);
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if( i_data == -1 )
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{
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intf_ErrMsg( "TS input : Error in select : %s", strerror(errno) );
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return( -1 );
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}
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if( i_data )
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{
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i_read = readv( p_input->i_handle, p_iovec, INPUT_READ_ONCE );
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if( i_read == -1 )
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{
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intf_ErrMsg( "TS input : Could not readv" );
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return( -1 );
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}
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input_NetlistMviovec( p_input->p_method_data,
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(int)(i_read/TS_PACKET_SIZE) , pp_packets );
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/* check correct TS header */
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for( i_loop=0; i_loop * TS_PACKET_SIZE < i_read; i_loop++ )
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{
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if( pp_packets[i_loop]->p_buffer[0] != 0x47 )
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intf_ErrMsg( "TS input : Bad TS Packet (starcode != 0x47)." );
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}
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}
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return 0;
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}
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