1 /*****************************************************************************
2 * input_ts.c: TS demux and netlist management
3 *****************************************************************************
4 * Copyright (C) 1998, 1999, 2000 VideoLAN
5 * $Id: input_ts.c,v 1.16 2001/04/28 03:36:25 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>
63 #include "stream_control.h"
64 #include "input_ext-intf.h"
65 #include "input_ext-dec.h"
70 #include "mpeg_system.h"
71 #include "input_netlist.h"
73 /*****************************************************************************
75 *****************************************************************************/
76 static int TSProbe ( probedata_t * );
77 static void TSInit ( struct input_thread_s * );
78 static void TSFakeOpen ( struct input_thread_s * );
79 static void TSEnd ( struct input_thread_s * );
80 static int TSRead ( struct input_thread_s *,
81 data_packet_t * p_packets[INPUT_READ_ONCE] );
83 /*****************************************************************************
84 * Functions exported as capabilities. They are declared as static so that
85 * we don't pollute the namespace too much.
86 *****************************************************************************/
87 void _M( input_getfunctions )( function_list_t * p_function_list )
89 #define input p_function_list->functions.input
90 p_function_list->pf_probe = TSProbe;
91 input.pf_init = TSInit;
92 input.pf_open = TSFakeOpen;
93 input.pf_close = NULL; /* Will be set by pf_open */
95 input.pf_set_area = NULL;
96 input.pf_read = TSRead;
97 input.pf_demux = input_DemuxTS;
98 input.pf_new_packet = input_NetlistNewPacket;
99 input.pf_new_pes = input_NetlistNewPES;
100 input.pf_delete_packet = input_NetlistDeletePacket;
101 input.pf_delete_pes = input_NetlistDeletePES;
102 input.pf_rewind = NULL;
103 input.pf_seek = NULL;
107 /*****************************************************************************
108 * TSProbe: verifies that the stream is a TS stream
109 *****************************************************************************/
110 static int TSProbe( probedata_t * p_data )
112 input_thread_t * p_input = (input_thread_t *)p_data;
114 char * psz_name = p_input->p_source;
118 if( TestMethod( INPUT_METHOD_VAR, "ts" ) )
123 if( ( strlen(psz_name) > 3 ) && !strncasecmp( psz_name, "ts:", 3 ) )
125 /* If the user specified "ts:" then it's probably a network stream */
129 if( ( strlen(psz_name) > 5 ) && !strncasecmp( psz_name, "file:", 5 ) )
131 /* If the user specified "file:" then it's probably a file */
135 i_handle = open( psz_name, 0 );
145 /*****************************************************************************
146 * TSInit: initializes TS structures
147 *****************************************************************************/
148 static void TSInit( input_thread_t * p_input )
150 /* Initialize netlist and TS structures */
151 thread_ts_data_t * p_method;
152 es_descriptor_t * p_pat_es;
153 es_ts_data_t * p_demux_data;
154 stream_ts_data_t * p_stream_data;
156 /* Initialise structure */
157 p_method = malloc( sizeof( thread_ts_data_t ) );
158 if( p_method == NULL )
160 intf_ErrMsg( "TS input : Out of memory" );
161 p_input->b_error = 1;
165 p_input->p_plugin_data = (void *)p_method;
166 p_input->p_method_data = NULL;
169 /* Initialize netlist */
170 if( input_NetlistInit( p_input, NB_DATA, NB_PES, TS_PACKET_SIZE,
173 intf_ErrMsg( "TS input : Could not initialize netlist" );
177 /* Initialize the stream */
178 input_InitStream( p_input, sizeof( stream_ts_data_t ) );
180 /* input method type */
181 /* FIXME: should test if you have network or file here */
182 p_input->stream.i_method = INPUT_METHOD_NETWORK;
185 p_stream_data = (stream_ts_data_t *)p_input->stream.p_demux_data;
186 p_stream_data->i_pat_version = PAT_UNINITIALIZED ;
188 /* We'll have to catch the PAT in order to continue
189 * Then the input will catch the PMT and then the others ES
190 * The PAT es is indepedent of any program. */
191 p_pat_es = input_AddES( p_input, NULL,
192 0x00, sizeof( es_ts_data_t ) );
193 p_demux_data=(es_ts_data_t *)p_pat_es->p_demux_data;
194 p_demux_data->b_psi = 1;
195 p_demux_data->i_psi_type = PSI_IS_PAT;
196 p_demux_data->p_psi_section = malloc(sizeof(psi_section_t));
197 p_demux_data->p_psi_section->b_is_complete = 1;
201 /*****************************************************************************
202 * TSFakeOpen: open the stream and set pf_close
203 *****************************************************************************/
204 void TSFakeOpen( input_thread_t * p_input )
206 #if !defined( SYS_BEOS ) && !defined( SYS_NTO ) && !defined( WIN32 )
207 char *psz_name = p_input->p_source;
209 if( ( strlen(psz_name) > 3 ) && !strncasecmp( psz_name, "ts:", 3 ) )
211 /* If the user specified "ts:" he wants a network stream */
212 p_input->pf_open = input_NetworkOpen;
213 p_input->pf_close = input_NetworkClose;
218 p_input->pf_open = input_FileOpen;
219 p_input->pf_close = input_FileClose;
222 p_input->pf_open( p_input );
225 /*****************************************************************************
226 * TSEnd: frees unused data
227 *****************************************************************************/
228 static void TSEnd( input_thread_t * p_input )
230 es_descriptor_t * p_pat_es;
232 p_pat_es = input_FindES( p_input, 0x00 );
234 if( p_pat_es != NULL )
235 input_DelES( p_input, p_pat_es );
236 free(p_input->p_plugin_data);
239 /*****************************************************************************
240 * TSRead: reads data packets
241 *****************************************************************************
242 * Returns -1 in case of error, 0 if everything went well, and 1 in case of
244 *****************************************************************************/
245 static int TSRead( input_thread_t * p_input,
246 data_packet_t * pp_packets[INPUT_READ_ONCE] )
248 thread_ts_data_t * p_method;
249 unsigned int i_read, i_loop;
251 struct iovec * p_iovec;
252 struct timeval s_wait;
256 p_method = ( thread_ts_data_t * )p_input->p_plugin_data;
258 /* Initialize file descriptor set */
259 FD_ZERO( &(p_method->s_fdset) );
260 FD_SET( p_input->i_handle, &(p_method->s_fdset) );
263 /* We'll wait 0.5 second if nothing happens */
267 /* Reset pointer table */
268 memset( pp_packets, 0, INPUT_READ_ONCE * sizeof(data_packet_t *) );
271 p_iovec = input_NetlistGetiovec( p_input->p_method_data );
273 if ( p_iovec == NULL )
275 return( -1 ); /* empty netlist */
278 /* Fill if some data is available */
279 i_data = select(p_input->i_handle + 1, &(p_method->s_fdset), NULL, NULL,
284 intf_ErrMsg( "input error: TS select error (%s)", strerror(errno) );
291 i_read = readv( p_input->i_handle, p_iovec, INPUT_READ_ONCE );
298 intf_ErrMsg( "input error: TS readv error" );
302 input_NetlistMviovec( p_input->p_method_data,
303 (int)(i_read/TS_PACKET_SIZE) , pp_packets );
305 /* check correct TS header */
306 for( i_loop=0; i_loop * TS_PACKET_SIZE < i_read; i_loop++ )
308 if( pp_packets[i_loop]->p_buffer[0] != 0x47 )
309 intf_ErrMsg( "input error: bad TS packet (starts with "
310 "0x%.2x, should be 0x47)",
311 pp_packets[i_loop]->p_buffer[0] );