1 /*****************************************************************************
2 * input_ts.c: TS demux and netlist management
3 *****************************************************************************
4 * Copyright (C) 1998, 1999, 2000 VideoLAN
5 * $Id: input_ts.c,v 1.15 2001/04/27 16:08:26 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 #include <sys/types.h>
39 #include <sys/select.h>
55 #include "stream_control.h"
56 #include "input_ext-intf.h"
57 #include "input_ext-dec.h"
62 #include "mpeg_system.h"
63 #include "input_netlist.h"
65 /*****************************************************************************
67 *****************************************************************************/
68 static int TSProbe ( probedata_t * );
69 static void TSInit ( struct input_thread_s * );
70 static void TSFakeOpen ( struct input_thread_s * );
71 static void TSEnd ( struct input_thread_s * );
72 static int TSRead ( struct input_thread_s *,
73 data_packet_t * p_packets[INPUT_READ_ONCE] );
75 /*****************************************************************************
76 * Functions exported as capabilities. They are declared as static so that
77 * we don't pollute the namespace too much.
78 *****************************************************************************/
79 void _M( input_getfunctions )( function_list_t * p_function_list )
81 #define input p_function_list->functions.input
82 p_function_list->pf_probe = TSProbe;
83 input.pf_init = TSInit;
84 input.pf_open = TSFakeOpen;
85 input.pf_close = NULL; /* Will be set by pf_open */
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) > 3 ) && !strncasecmp( psz_name, "ts:", 3 ) )
117 /* If the user specified "ts:" then it's probably a network stream */
121 if( ( strlen(psz_name) > 5 ) && !strncasecmp( psz_name, "file:", 5 ) )
123 /* If the user specified "file:" then it's probably a file */
127 i_handle = open( psz_name, 0 );
137 /*****************************************************************************
138 * TSInit: initializes TS structures
139 *****************************************************************************/
140 static void TSInit( input_thread_t * p_input )
142 /* Initialize netlist and TS structures */
143 thread_ts_data_t * p_method;
144 es_descriptor_t * p_pat_es;
145 es_ts_data_t * p_demux_data;
146 stream_ts_data_t * p_stream_data;
148 /* Initialise structure */
149 p_method = malloc( sizeof( thread_ts_data_t ) );
150 if( p_method == NULL )
152 intf_ErrMsg( "TS input : Out of memory" );
153 p_input->b_error = 1;
157 p_input->p_plugin_data = (void *)p_method;
158 p_input->p_method_data = NULL;
161 /* Initialize netlist */
162 if( input_NetlistInit( p_input, NB_DATA, NB_PES, TS_PACKET_SIZE,
165 intf_ErrMsg( "TS input : Could not initialize netlist" );
169 /* Initialize the stream */
170 input_InitStream( p_input, sizeof( stream_ts_data_t ) );
172 /* input method type */
173 /* FIXME: should test if you have network or file here */
174 p_input->stream.i_method = INPUT_METHOD_NETWORK;
177 p_stream_data = (stream_ts_data_t *)p_input->stream.p_demux_data;
178 p_stream_data->i_pat_version = PAT_UNINITIALIZED ;
180 /* We'll have to catch the PAT in order to continue
181 * Then the input will catch the PMT and then the others ES
182 * The PAT es is indepedent of any program. */
183 p_pat_es = input_AddES( p_input, NULL,
184 0x00, sizeof( es_ts_data_t ) );
185 p_demux_data=(es_ts_data_t *)p_pat_es->p_demux_data;
186 p_demux_data->b_psi = 1;
187 p_demux_data->i_psi_type = PSI_IS_PAT;
188 p_demux_data->p_psi_section = malloc(sizeof(psi_section_t));
189 p_demux_data->p_psi_section->b_is_complete = 1;
193 /*****************************************************************************
194 * TSFakeOpen: open the stream and set pf_close
195 *****************************************************************************/
196 void TSFakeOpen( input_thread_t * p_input )
198 #if !defined( SYS_BEOS ) && !defined( SYS_NTO )
199 char *psz_name = p_input->p_source;
201 if( ( strlen(psz_name) > 3 ) && !strncasecmp( psz_name, "ts:", 3 ) )
203 /* If the user specified "ts:" he wants a network stream */
204 p_input->pf_open = input_NetworkOpen;
205 p_input->pf_close = input_NetworkClose;
210 p_input->pf_open = input_FileOpen;
211 p_input->pf_close = input_FileClose;
214 p_input->pf_open( p_input );
217 /*****************************************************************************
218 * TSEnd: frees unused data
219 *****************************************************************************/
220 static void TSEnd( input_thread_t * p_input )
222 es_descriptor_t * p_pat_es;
224 p_pat_es = input_FindES( p_input, 0x00 );
226 if( p_pat_es != NULL )
227 input_DelES( p_input, p_pat_es );
228 free(p_input->p_plugin_data);
231 /*****************************************************************************
232 * TSRead: reads data packets
233 *****************************************************************************
234 * Returns -1 in case of error, 0 if everything went well, and 1 in case of
236 *****************************************************************************/
237 static int TSRead( input_thread_t * p_input,
238 data_packet_t * pp_packets[INPUT_READ_ONCE] )
240 thread_ts_data_t * p_method;
241 unsigned int i_read, i_loop;
243 struct iovec * p_iovec;
244 struct timeval s_wait;
248 p_method = ( thread_ts_data_t * )p_input->p_plugin_data;
250 /* Initialize file descriptor set */
251 FD_ZERO( &(p_method->s_fdset) );
252 FD_SET( p_input->i_handle, &(p_method->s_fdset) );
255 /* We'll wait 0.5 second if nothing happens */
259 /* Reset pointer table */
260 memset( pp_packets, 0, INPUT_READ_ONCE * sizeof(data_packet_t *) );
263 p_iovec = input_NetlistGetiovec( p_input->p_method_data );
265 if ( p_iovec == NULL )
267 return( -1 ); /* empty netlist */
270 /* Fill if some data is available */
271 i_data = select(p_input->i_handle + 1, &(p_method->s_fdset), NULL, NULL,
276 intf_ErrMsg( "input error: TS select error (%s)", strerror(errno) );
282 i_read = readv( p_input->i_handle, p_iovec, INPUT_READ_ONCE );
286 intf_ErrMsg( "input error: TS readv error" );
290 input_NetlistMviovec( p_input->p_method_data,
291 (int)(i_read/TS_PACKET_SIZE) , pp_packets );
293 /* check correct TS header */
294 for( i_loop=0; i_loop * TS_PACKET_SIZE < i_read; i_loop++ )
296 if( pp_packets[i_loop]->p_buffer[0] != 0x47 )
297 intf_ErrMsg( "input error: bad TS packet (starts with "
298 "0x%.2x, should be 0x47)",
299 pp_packets[i_loop]->p_buffer[0] );