1 /*****************************************************************************
2 * input_ts.c: TS demux and netlist management
3 *****************************************************************************
4 * Copyright (C) 1998, 1999, 2000 VideoLAN
5 * $Id: input_ts.c,v 1.26 2001/06/03 12:47:21 sam 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 #ifdef STRNCASECMP_IN_STRINGS_H
40 #include <sys/types.h>
42 #if !defined( _MSC_VER )
43 # include <sys/time.h>
47 # include <sys/select.h>
60 # include "input_iovec.h"
62 # include <sys/uio.h> /* struct iovec */
73 #include "stream_control.h"
74 #include "input_ext-intf.h"
75 #include "input_ext-dec.h"
80 #include "mpeg_system.h"
81 #include "input_netlist.h"
84 #include "modules_export.h"
86 /*****************************************************************************
88 *****************************************************************************/
89 static int TSProbe ( probedata_t * );
90 static void TSInit ( struct input_thread_s * );
91 static void TSFakeOpen ( struct input_thread_s * );
92 static void TSEnd ( struct input_thread_s * );
93 static int TSRead ( struct input_thread_s *,
94 data_packet_t * p_packets[INPUT_READ_ONCE] );
96 /*****************************************************************************
97 * Functions exported as capabilities. They are declared as static so that
98 * we don't pollute the namespace too much.
99 *****************************************************************************/
100 void _M( input_getfunctions )( function_list_t * p_function_list )
102 #define input p_function_list->functions.input
103 p_function_list->pf_probe = TSProbe;
104 input.pf_init = TSInit;
105 input.pf_open = TSFakeOpen;
106 input.pf_close = NULL; /* Will be set by pf_open */
107 input.pf_end = TSEnd;
108 input.pf_set_area = NULL;
109 input.pf_read = TSRead;
110 input.pf_demux = input_DemuxTS;
111 input.pf_new_packet = input_NetlistNewPacket;
112 input.pf_new_pes = input_NetlistNewPES;
113 input.pf_delete_packet = input_NetlistDeletePacket;
114 input.pf_delete_pes = input_NetlistDeletePES;
115 input.pf_rewind = NULL;
116 input.pf_seek = NULL;
120 /*****************************************************************************
121 * TSProbe: verifies that the stream is a TS stream
122 *****************************************************************************/
123 static int TSProbe( probedata_t * p_data )
125 input_thread_t * p_input = (input_thread_t *)p_data;
127 char * psz_name = p_input->p_source;
131 if( TestMethod( INPUT_METHOD_VAR, "ts" ) )
136 if( ( strlen(psz_name) > 3 ) && !strncasecmp( psz_name, "ts:", 3 ) )
138 /* If the user specified "ts:" then it's probably a network stream */
142 if( ( strlen(psz_name) > 5 ) && !strncasecmp( psz_name, "file:", 5 ) )
144 /* If the user specified "file:" then it's probably a file */
148 if( ( strlen(psz_name) > 3 ) &&
149 !strncasecmp( psz_name+strlen(psz_name)-3, ".ts", 3) )
151 /* If it is a ".ts" file it's probably a TS file ... */
155 i_handle = open( psz_name, 0 );
165 /*****************************************************************************
166 * TSInit: initializes TS structures
167 *****************************************************************************/
168 static void TSInit( input_thread_t * p_input )
170 /* Initialize netlist and TS structures */
171 thread_ts_data_t * p_method;
172 es_descriptor_t * p_pat_es;
173 es_ts_data_t * p_demux_data;
174 stream_ts_data_t * p_stream_data;
176 /* Initialise structure */
177 p_method = malloc( sizeof( thread_ts_data_t ) );
178 if( p_method == NULL )
180 intf_ErrMsg( "TS input : Out of memory" );
181 p_input->b_error = 1;
185 p_input->p_plugin_data = (void *)p_method;
186 p_input->p_method_data = NULL;
189 /* Initialize netlist */
190 if( input_NetlistInit( p_input, NB_DATA, NB_PES, TS_PACKET_SIZE,
193 intf_ErrMsg( "TS input : Could not initialize netlist" );
197 /* Initialize the stream */
198 input_InitStream( p_input, sizeof( stream_ts_data_t ) );
200 /* input method type */
201 /* FIXME: should test if you have network or file here */
202 p_input->stream.i_method = INPUT_METHOD_NETWORK;
203 p_input->stream.p_selected_area->i_tell = 0;
206 p_stream_data = (stream_ts_data_t *)p_input->stream.p_demux_data;
207 p_stream_data->i_pat_version = PAT_UNINITIALIZED ;
209 /* We'll have to catch the PAT in order to continue
210 * Then the input will catch the PMT and then the others ES
211 * The PAT es is indepedent of any program. */
212 p_pat_es = input_AddES( p_input, NULL,
213 0x00, sizeof( es_ts_data_t ) );
214 p_demux_data=(es_ts_data_t *)p_pat_es->p_demux_data;
215 p_demux_data->b_psi = 1;
216 p_demux_data->i_psi_type = PSI_IS_PAT;
217 p_demux_data->p_psi_section = malloc(sizeof(psi_section_t));
218 p_demux_data->p_psi_section->b_is_complete = 1;
222 /*****************************************************************************
223 * TSFakeOpen: open the stream and set pf_close
224 *****************************************************************************/
225 void TSFakeOpen( input_thread_t * p_input )
227 #if !defined( SYS_BEOS ) && !defined( SYS_NTO )
228 char *psz_name = p_input->p_source;
230 if( ( strlen(psz_name) > 3 ) && !strncasecmp( psz_name, "ts:", 3 ) )
232 /* If the user specified "ts:" he wants a network stream */
233 p_input->pf_open = p_input->pf_network_open;
234 p_input->pf_close = p_input->pf_network_close;
239 p_input->pf_open = p_input->pf_file_open;
240 p_input->pf_close = p_input->pf_file_close;
243 p_input->pf_open( p_input );
246 /*****************************************************************************
247 * TSEnd: frees unused data
248 *****************************************************************************/
249 static void TSEnd( input_thread_t * p_input )
251 es_descriptor_t * p_pat_es;
253 p_pat_es = input_FindES( p_input, 0x00 );
255 if( p_pat_es != NULL )
256 input_DelES( p_input, p_pat_es );
257 free(p_input->p_plugin_data);
260 /*****************************************************************************
261 * TSRead: reads data packets
262 *****************************************************************************
263 * Returns -1 in case of error, 0 if everything went well, and 1 in case of
265 *****************************************************************************/
266 static int TSRead( input_thread_t * p_input,
267 data_packet_t * pp_packets[INPUT_READ_ONCE] )
269 thread_ts_data_t * p_method;
270 unsigned int i_read, i_loop;
272 struct iovec * p_iovec;
273 struct timeval s_wait;
277 p_iovec = input_NetlistGetiovec( p_input->p_method_data );
279 if ( p_iovec == NULL )
281 return( -1 ); /* empty netlist */
285 p_method = ( thread_ts_data_t * )p_input->p_plugin_data;
287 /* Initialize file descriptor set */
288 FD_ZERO( &(p_method->fds) );
289 FD_SET( p_input->i_handle, &(p_method->fds) );
291 /* We'll wait 0.5 second if nothing happens */
293 s_wait.tv_usec = 500000;
295 /* Reset pointer table */
296 memset( pp_packets, 0, INPUT_READ_ONCE * sizeof(data_packet_t *) );
298 /* Fill if some data is available */
299 i_data = select( p_input->i_handle + 1, &(p_method->fds), NULL, NULL,
304 intf_ErrMsg( "input error: TS select error (%s)", strerror(errno) );
310 i_read = readv( p_input->i_handle, p_iovec, INPUT_READ_ONCE );
314 intf_ErrMsg( "input error: TS readv error" );
318 input_NetlistMviovec( p_input->p_method_data,
319 (int)(i_read/TS_PACKET_SIZE) , pp_packets );
321 /* check correct TS header */
322 for( i_loop=0; i_loop * TS_PACKET_SIZE < i_read; i_loop++ )
324 if( pp_packets[i_loop]->p_buffer[0] != 0x47 )
325 intf_ErrMsg( "input error: bad TS packet (starts with "
326 "0x%.2x, should be 0x47)",
327 pp_packets[i_loop]->p_buffer[0] );
330 p_input->stream.p_selected_area->i_tell += i_read;