1 /*****************************************************************************
2 * input_ts.c: TS demux and netlist management
3 *****************************************************************************
4 * Copyright (C) 1998, 1999, 2000 VideoLAN
5 * $Id: input_ts.c,v 1.10 2001/03/18 18:48:27 henri Exp $
7 * Authors: Henri Fallon <henri@videolan.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 #define MODULE_NAME ts
25 #include "modules_inner.h"
27 /*****************************************************************************
29 *****************************************************************************/
36 #include <sys/types.h>
51 #include "stream_control.h"
52 #include "input_ext-intf.h"
53 #include "input_ext-dec.h"
58 #include "mpeg_system.h"
59 #include "input_netlist.h"
61 /*****************************************************************************
63 *****************************************************************************/
64 static int TSProbe ( probedata_t * );
65 static int TSRead ( struct input_thread_s *,
66 data_packet_t * p_packets[INPUT_READ_ONCE] );
67 static void TSInit ( struct input_thread_s * );
68 static void TSEnd ( struct input_thread_s * );
70 /*****************************************************************************
71 * Functions exported as capabilities. They are declared as static so that
72 * we don't pollute the namespace too much.
73 *****************************************************************************/
74 void _M( input_getfunctions )( function_list_t * p_function_list )
76 #define input p_function_list->functions.input
77 p_function_list->pf_probe = TSProbe;
78 input.pf_init = TSInit;
80 input.pf_open = input_FileOpen;
81 input.pf_close = input_FileClose;
83 input.pf_open = input_NetworkOpen;
84 input.pf_close = input_NetworkClose;
87 input.pf_set_area = NULL;
88 input.pf_read = TSRead;
89 input.pf_demux = input_DemuxTS;
90 input.pf_new_packet = input_NetlistNewPacket;
91 input.pf_new_pes = input_NetlistNewPES;
92 input.pf_delete_packet = input_NetlistDeletePacket;
93 input.pf_delete_pes = input_NetlistDeletePES;
94 input.pf_rewind = NULL;
99 /*****************************************************************************
100 * TSProbe: verifies that the stream is a TS stream
101 *****************************************************************************/
102 static int TSProbe( probedata_t * p_data )
104 input_thread_t * p_input = (input_thread_t *)p_data;
106 char * psz_name = p_input->p_source;
110 if( TestMethod( INPUT_METHOD_VAR, "ts" ) )
115 if( ( strlen(psz_name) > 5 ) && !strncasecmp( psz_name, "file:", 5 ) )
117 /* If the user specified "file:" then it's probably a file */
121 i_handle = open( psz_name, 0 );
131 /*****************************************************************************
132 * TSInit: initializes TS structures
133 *****************************************************************************/
134 static void TSInit( input_thread_t * p_input )
136 /* Initialize netlist and TS structures */
137 thread_ts_data_t * p_method;
138 es_descriptor_t * p_pat_es;
139 es_ts_data_t * p_demux_data;
140 stream_ts_data_t * p_stream_data;
142 /* Initialise structure */
143 p_method = malloc( sizeof( thread_ts_data_t ) );
144 if( p_method == NULL )
146 intf_ErrMsg( "TS input : Out of memory" );
147 p_input->b_error = 1;
151 p_input->p_plugin_data = (void *)p_method;
152 p_input->p_method_data = NULL;
155 /* Initialize netlist */
156 if( input_NetlistInit( p_input, NB_DATA, NB_PES, TS_PACKET_SIZE,
159 intf_ErrMsg( "TS input : Could not initialize netlist" );
163 /* Initialize the stream */
164 input_InitStream( p_input, sizeof( stream_ts_data_t ) );
167 p_stream_data = (stream_ts_data_t *)p_input->stream.p_demux_data;
168 p_stream_data->i_pat_version = PAT_UNINITIALIZED ;
170 /* We'll have to catch the PAT in order to continue
171 * Then the input will catch the PMT and then the others ES
172 * The PAT es is indepedent of any program. */
173 p_pat_es = input_AddES( p_input, NULL,
174 0x00, sizeof( es_ts_data_t ) );
175 p_demux_data=(es_ts_data_t *)p_pat_es->p_demux_data;
176 p_demux_data->b_psi = 1;
177 p_demux_data->i_psi_type = PSI_IS_PAT;
178 p_demux_data->p_psi_section = malloc(sizeof(psi_section_t));
179 p_demux_data->p_psi_section->b_is_complete = 1;
183 /*****************************************************************************
184 * TSEnd: frees unused data
185 *****************************************************************************/
186 static void TSEnd( input_thread_t * p_input )
188 es_descriptor_t * p_pat_es;
190 p_pat_es = input_FindES( p_input, 0x00 );
192 if( p_pat_es != NULL )
193 input_DelES( p_input, p_pat_es );
194 free(p_input->p_plugin_data);
197 /*****************************************************************************
198 * TSRead: reads data packets
199 *****************************************************************************
200 * Returns -1 in case of error, 0 if everything went well, and 1 in case of
202 *****************************************************************************/
203 static int TSRead( input_thread_t * p_input,
204 data_packet_t * pp_packets[INPUT_READ_ONCE] )
206 thread_ts_data_t * p_method;
207 unsigned int i_read, i_loop;
209 struct iovec * p_iovec;
210 struct timeval s_wait;
214 p_method = ( thread_ts_data_t * )p_input->p_plugin_data;
216 /* Initialize file descriptor set */
217 FD_ZERO( &(p_method->s_fdset) );
218 FD_SET( p_input->i_handle, &(p_method->s_fdset) );
221 /* We'll wait 0.5 second if nothing happens */
225 /* Reset pointer table */
226 memset( pp_packets, 0, INPUT_READ_ONCE*sizeof(data_packet_t *) );
229 p_iovec = input_NetlistGetiovec( p_input->p_method_data );
231 if ( p_iovec == NULL )
233 return( -1 ); /* empty netlist */
236 /* Fill if some data is available */
237 i_data = select(p_input->i_handle + 1, &(p_method->s_fdset), NULL, NULL,
242 intf_ErrMsg( "TS input : Error in select : %s", strerror(errno) );
248 i_read = readv( p_input->i_handle, p_iovec, INPUT_READ_ONCE );
252 intf_ErrMsg( "TS input : Could not readv" );
256 input_NetlistMviovec( p_input->p_method_data,
257 (int)(i_read/TS_PACKET_SIZE) , pp_packets );
259 /* check correct TS header */
260 for( i_loop=0; i_loop < (int)(i_read/TS_PACKET_SIZE); i_loop++ )
262 if( pp_packets[i_loop]->p_buffer[0] != 0x47 )
263 intf_ErrMsg( "TS input : Bad TS Packet (starcode != 0x47)." );