1 /*****************************************************************************
2 * input_ts.c: TS demux and netlist management
3 *****************************************************************************
4 * Copyright (C) 1998, 1999, 2000 VideoLAN
5 * $Id: input_ts.c,v 1.21 2001/05/30 17:03:12 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>
43 #include <sys/select.h>
47 # include <sys/uio.h> /* struct iovec */
51 void *iov_base; /* Pointer to data. */
52 size_t iov_len; /* Length of data. */
69 #include "stream_control.h"
70 #include "input_ext-intf.h"
71 #include "input_ext-dec.h"
76 #include "mpeg_system.h"
77 #include "input_netlist.h"
79 /*****************************************************************************
81 *****************************************************************************/
82 static int TSProbe ( probedata_t * );
83 static void TSInit ( struct input_thread_s * );
84 static void TSFakeOpen ( struct input_thread_s * );
85 static void TSEnd ( struct input_thread_s * );
86 static int TSRead ( struct input_thread_s *,
87 data_packet_t * p_packets[INPUT_READ_ONCE] );
89 /*****************************************************************************
90 * Functions exported as capabilities. They are declared as static so that
91 * we don't pollute the namespace too much.
92 *****************************************************************************/
93 void _M( input_getfunctions )( function_list_t * p_function_list )
95 #define input p_function_list->functions.input
96 p_function_list->pf_probe = TSProbe;
97 input.pf_init = TSInit;
98 input.pf_open = TSFakeOpen;
99 input.pf_close = NULL; /* Will be set by pf_open */
100 input.pf_end = TSEnd;
101 input.pf_set_area = NULL;
102 input.pf_read = TSRead;
103 input.pf_demux = input_DemuxTS;
104 input.pf_new_packet = input_NetlistNewPacket;
105 input.pf_new_pes = input_NetlistNewPES;
106 input.pf_delete_packet = input_NetlistDeletePacket;
107 input.pf_delete_pes = input_NetlistDeletePES;
108 input.pf_rewind = NULL;
109 input.pf_seek = NULL;
113 /*****************************************************************************
114 * TSProbe: verifies that the stream is a TS stream
115 *****************************************************************************/
116 static int TSProbe( probedata_t * p_data )
118 input_thread_t * p_input = (input_thread_t *)p_data;
120 char * psz_name = p_input->p_source;
124 if( TestMethod( INPUT_METHOD_VAR, "ts" ) )
129 if( ( strlen(psz_name) > 3 ) && !strncasecmp( psz_name, "ts:", 3 ) )
131 /* If the user specified "ts:" then it's probably a network stream */
135 if( ( strlen(psz_name) > 5 ) && !strncasecmp( psz_name, "file:", 5 ) )
137 /* If the user specified "file:" then it's probably a file */
141 if( ( strlen(psz_name) > 3 ) &&
142 !strncasecmp( psz_name+strlen(psz_name)-3, ".ts", 3) )
144 /* If it is a ".ts" file it's probably a TS file ... */
148 i_handle = open( psz_name, 0 );
158 /*****************************************************************************
159 * TSInit: initializes TS structures
160 *****************************************************************************/
161 static void TSInit( input_thread_t * p_input )
163 /* Initialize netlist and TS structures */
164 thread_ts_data_t * p_method;
165 es_descriptor_t * p_pat_es;
166 es_ts_data_t * p_demux_data;
167 stream_ts_data_t * p_stream_data;
169 /* Initialise structure */
170 p_method = malloc( sizeof( thread_ts_data_t ) );
171 if( p_method == NULL )
173 intf_ErrMsg( "TS input : Out of memory" );
174 p_input->b_error = 1;
178 p_input->p_plugin_data = (void *)p_method;
179 p_input->p_method_data = NULL;
182 /* Initialize netlist */
183 if( input_NetlistInit( p_input, NB_DATA, NB_PES, TS_PACKET_SIZE,
186 intf_ErrMsg( "TS input : Could not initialize netlist" );
190 /* Initialize the stream */
191 input_InitStream( p_input, sizeof( stream_ts_data_t ) );
193 /* input method type */
194 /* FIXME: should test if you have network or file here */
195 p_input->stream.i_method = INPUT_METHOD_NETWORK;
196 p_input->stream.p_selected_area->i_tell = 0;
199 p_stream_data = (stream_ts_data_t *)p_input->stream.p_demux_data;
200 p_stream_data->i_pat_version = PAT_UNINITIALIZED ;
202 /* We'll have to catch the PAT in order to continue
203 * Then the input will catch the PMT and then the others ES
204 * The PAT es is indepedent of any program. */
205 p_pat_es = input_AddES( p_input, NULL,
206 0x00, sizeof( es_ts_data_t ) );
207 p_demux_data=(es_ts_data_t *)p_pat_es->p_demux_data;
208 p_demux_data->b_psi = 1;
209 p_demux_data->i_psi_type = PSI_IS_PAT;
210 p_demux_data->p_psi_section = malloc(sizeof(psi_section_t));
211 p_demux_data->p_psi_section->b_is_complete = 1;
215 /*****************************************************************************
216 * TSFakeOpen: open the stream and set pf_close
217 *****************************************************************************/
218 void TSFakeOpen( input_thread_t * p_input )
220 #if !defined( SYS_BEOS ) && !defined( SYS_NTO )
221 char *psz_name = p_input->p_source;
223 if( ( strlen(psz_name) > 3 ) && !strncasecmp( psz_name, "ts:", 3 ) )
225 /* If the user specified "ts:" he wants a network stream */
226 p_input->pf_open = p_input->pf_network_open;
227 p_input->pf_close = p_input->pf_network_close;
232 p_input->pf_open = p_input->pf_file_open;
233 p_input->pf_close = p_input->pf_file_close;
236 p_input->pf_open( p_input );
239 /*****************************************************************************
240 * TSEnd: frees unused data
241 *****************************************************************************/
242 static void TSEnd( input_thread_t * p_input )
244 es_descriptor_t * p_pat_es;
246 p_pat_es = input_FindES( p_input, 0x00 );
248 if( p_pat_es != NULL )
249 input_DelES( p_input, p_pat_es );
250 free(p_input->p_plugin_data);
253 /*****************************************************************************
254 * TSRead: reads data packets
255 *****************************************************************************
256 * Returns -1 in case of error, 0 if everything went well, and 1 in case of
258 *****************************************************************************/
259 static int TSRead( input_thread_t * p_input,
260 data_packet_t * pp_packets[INPUT_READ_ONCE] )
262 thread_ts_data_t * p_method;
263 unsigned int i_read, i_loop;
265 struct iovec * p_iovec;
266 struct timeval s_wait;
270 p_iovec = input_NetlistGetiovec( p_input->p_method_data );
272 if ( p_iovec == NULL )
274 return( -1 ); /* empty netlist */
278 p_method = ( thread_ts_data_t * )p_input->p_plugin_data;
280 /* Initialize file descriptor set */
281 FD_ZERO( &(p_method->s_fdset) );
282 FD_SET( p_input->i_handle, &(p_method->s_fdset) );
285 /* We'll wait 0.5 second if nothing happens */
287 s_wait.tv_usec = 500000;
289 /* Reset pointer table */
290 memset( pp_packets, 0, INPUT_READ_ONCE * sizeof(data_packet_t *) );
292 /* Fill if some data is available */
293 i_data = select( p_input->i_handle + 1, &(p_method->s_fdset), NULL, NULL,
298 intf_ErrMsg( "input error: TS select error (%s)", strerror(errno) );
304 i_read = readv( p_input->i_handle, p_iovec, INPUT_READ_ONCE );
308 intf_ErrMsg( "input error: TS readv error" );
312 input_NetlistMviovec( p_input->p_method_data,
313 (int)(i_read/TS_PACKET_SIZE) , pp_packets );
315 /* check correct TS header */
316 for( i_loop=0; i_loop * TS_PACKET_SIZE < i_read; i_loop++ )
318 if( pp_packets[i_loop]->p_buffer[0] != 0x47 )
319 intf_ErrMsg( "input error: bad TS packet (starts with "
320 "0x%.2x, should be 0x47)",
321 pp_packets[i_loop]->p_buffer[0] );
324 p_input->stream.p_selected_area->i_tell += i_read;