1 /*****************************************************************************
2 * input_ts.c: TS demux and netlist management
3 *****************************************************************************
4 * Copyright (C) 1998, 1999, 2000 VideoLAN
5 * $Id: input_ts.c,v 1.22 2001/05/31 01:37:08 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 *****************************************************************************/
34 #ifdef STRNCASECMP_IN_STRINGS_H
39 #include <sys/types.h>
41 #if !defined( _MSC_VER )
46 #include <sys/select.h>
58 #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"
83 /*****************************************************************************
85 *****************************************************************************/
86 static int TSProbe ( probedata_t * );
87 static void TSInit ( struct input_thread_s * );
88 static void TSFakeOpen ( struct input_thread_s * );
89 static void TSEnd ( struct input_thread_s * );
90 static int TSRead ( struct input_thread_s *,
91 data_packet_t * p_packets[INPUT_READ_ONCE] );
93 /*****************************************************************************
94 * Functions exported as capabilities. They are declared as static so that
95 * we don't pollute the namespace too much.
96 *****************************************************************************/
97 void _M( input_getfunctions )( function_list_t * p_function_list )
99 #define input p_function_list->functions.input
100 p_function_list->pf_probe = TSProbe;
101 input.pf_init = TSInit;
102 input.pf_open = TSFakeOpen;
103 input.pf_close = NULL; /* Will be set by pf_open */
104 input.pf_end = TSEnd;
105 input.pf_set_area = NULL;
106 input.pf_read = TSRead;
107 input.pf_demux = input_DemuxTS;
108 input.pf_new_packet = input_NetlistNewPacket;
109 input.pf_new_pes = input_NetlistNewPES;
110 input.pf_delete_packet = input_NetlistDeletePacket;
111 input.pf_delete_pes = input_NetlistDeletePES;
112 input.pf_rewind = NULL;
113 input.pf_seek = NULL;
117 /*****************************************************************************
118 * TSProbe: verifies that the stream is a TS stream
119 *****************************************************************************/
120 static int TSProbe( probedata_t * p_data )
122 input_thread_t * p_input = (input_thread_t *)p_data;
124 char * psz_name = p_input->p_source;
128 if( TestMethod( INPUT_METHOD_VAR, "ts" ) )
133 if( ( strlen(psz_name) > 3 ) && !strncasecmp( psz_name, "ts:", 3 ) )
135 /* If the user specified "ts:" then it's probably a network stream */
139 if( ( strlen(psz_name) > 5 ) && !strncasecmp( psz_name, "file:", 5 ) )
141 /* If the user specified "file:" then it's probably a file */
145 if( ( strlen(psz_name) > 3 ) &&
146 !strncasecmp( psz_name+strlen(psz_name)-3, ".ts", 3) )
148 /* If it is a ".ts" file it's probably a TS file ... */
152 i_handle = open( psz_name, 0 );
162 /*****************************************************************************
163 * TSInit: initializes TS structures
164 *****************************************************************************/
165 static void TSInit( input_thread_t * p_input )
167 /* Initialize netlist and TS structures */
168 thread_ts_data_t * p_method;
169 es_descriptor_t * p_pat_es;
170 es_ts_data_t * p_demux_data;
171 stream_ts_data_t * p_stream_data;
173 /* Initialise structure */
174 p_method = malloc( sizeof( thread_ts_data_t ) );
175 if( p_method == NULL )
177 intf_ErrMsg( "TS input : Out of memory" );
178 p_input->b_error = 1;
182 p_input->p_plugin_data = (void *)p_method;
183 p_input->p_method_data = NULL;
186 /* Initialize netlist */
187 if( input_NetlistInit( p_input, NB_DATA, NB_PES, TS_PACKET_SIZE,
190 intf_ErrMsg( "TS input : Could not initialize netlist" );
194 /* Initialize the stream */
195 input_InitStream( p_input, sizeof( stream_ts_data_t ) );
197 /* input method type */
198 /* FIXME: should test if you have network or file here */
199 p_input->stream.i_method = INPUT_METHOD_NETWORK;
200 p_input->stream.p_selected_area->i_tell = 0;
203 p_stream_data = (stream_ts_data_t *)p_input->stream.p_demux_data;
204 p_stream_data->i_pat_version = PAT_UNINITIALIZED ;
206 /* We'll have to catch the PAT in order to continue
207 * Then the input will catch the PMT and then the others ES
208 * The PAT es is indepedent of any program. */
209 p_pat_es = input_AddES( p_input, NULL,
210 0x00, sizeof( es_ts_data_t ) );
211 p_demux_data=(es_ts_data_t *)p_pat_es->p_demux_data;
212 p_demux_data->b_psi = 1;
213 p_demux_data->i_psi_type = PSI_IS_PAT;
214 p_demux_data->p_psi_section = malloc(sizeof(psi_section_t));
215 p_demux_data->p_psi_section->b_is_complete = 1;
219 /*****************************************************************************
220 * TSFakeOpen: open the stream and set pf_close
221 *****************************************************************************/
222 void TSFakeOpen( input_thread_t * p_input )
224 #if !defined( SYS_BEOS ) && !defined( SYS_NTO )
225 char *psz_name = p_input->p_source;
227 if( ( strlen(psz_name) > 3 ) && !strncasecmp( psz_name, "ts:", 3 ) )
229 /* If the user specified "ts:" he wants a network stream */
230 p_input->pf_open = p_input->pf_network_open;
231 p_input->pf_close = p_input->pf_network_close;
236 p_input->pf_open = p_input->pf_file_open;
237 p_input->pf_close = p_input->pf_file_close;
240 p_input->pf_open( p_input );
243 /*****************************************************************************
244 * TSEnd: frees unused data
245 *****************************************************************************/
246 static void TSEnd( input_thread_t * p_input )
248 es_descriptor_t * p_pat_es;
250 p_pat_es = input_FindES( p_input, 0x00 );
252 if( p_pat_es != NULL )
253 input_DelES( p_input, p_pat_es );
254 free(p_input->p_plugin_data);
257 /*****************************************************************************
258 * TSRead: reads data packets
259 *****************************************************************************
260 * Returns -1 in case of error, 0 if everything went well, and 1 in case of
262 *****************************************************************************/
263 static int TSRead( input_thread_t * p_input,
264 data_packet_t * pp_packets[INPUT_READ_ONCE] )
266 thread_ts_data_t * p_method;
267 unsigned int i_read, i_loop;
269 struct iovec * p_iovec;
270 struct timeval s_wait;
274 p_iovec = input_NetlistGetiovec( p_input->p_method_data );
276 if ( p_iovec == NULL )
278 return( -1 ); /* empty netlist */
282 p_method = ( thread_ts_data_t * )p_input->p_plugin_data;
284 /* Initialize file descriptor set */
285 FD_ZERO( &(p_method->s_fdset) );
286 FD_SET( p_input->i_handle, &(p_method->s_fdset) );
289 /* We'll wait 0.5 second if nothing happens */
291 s_wait.tv_usec = 500000;
293 /* Reset pointer table */
294 memset( pp_packets, 0, INPUT_READ_ONCE * sizeof(data_packet_t *) );
296 /* Fill if some data is available */
297 i_data = select( p_input->i_handle + 1, &(p_method->s_fdset), NULL, NULL,
302 intf_ErrMsg( "input error: TS select error (%s)", strerror(errno) );
308 i_read = readv( p_input->i_handle, p_iovec, INPUT_READ_ONCE );
312 intf_ErrMsg( "input error: TS readv error" );
316 input_NetlistMviovec( p_input->p_method_data,
317 (int)(i_read/TS_PACKET_SIZE) , pp_packets );
319 /* check correct TS header */
320 for( i_loop=0; i_loop * TS_PACKET_SIZE < i_read; i_loop++ )
322 if( pp_packets[i_loop]->p_buffer[0] != 0x47 )
323 intf_ErrMsg( "input error: bad TS packet (starts with "
324 "0x%.2x, should be 0x47)",
325 pp_packets[i_loop]->p_buffer[0] );
328 p_input->stream.p_selected_area->i_tell += i_read;