1 /*****************************************************************************
2 * input_ts.c: TS demux and netlist management
3 *****************************************************************************
4 * Copyright (C) 1998, 1999, 2000 VideoLAN
5 * $Id: input_ts.c,v 1.32 2001/08/27 16:13:20 massiot 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 <winsock2.h>
62 # include <sys/uio.h> /* struct iovec */
72 # include "input_iovec.h"
77 #include "stream_control.h"
78 #include "input_ext-intf.h"
79 #include "input_ext-dec.h"
80 #include "input_ext-plugins.h"
85 #include "modules_export.h"
87 /*****************************************************************************
89 *****************************************************************************/
90 static int TSProbe ( probedata_t * );
91 static void TSInit ( struct input_thread_s * );
92 static void TSFakeOpen ( struct input_thread_s * );
93 static void TSEnd ( struct input_thread_s * );
94 static int TSRead ( struct input_thread_s *,
95 data_packet_t * p_packets[INPUT_READ_ONCE] );
97 /*****************************************************************************
98 * Functions exported as capabilities. They are declared as static so that
99 * we don't pollute the namespace too much.
100 *****************************************************************************/
101 void _M( input_getfunctions )( function_list_t * p_function_list )
103 #define input p_function_list->functions.input
104 p_function_list->pf_probe = TSProbe;
105 input.pf_init = TSInit;
106 input.pf_open = TSFakeOpen;
107 input.pf_close = NULL; /* Will be set by pf_open */
108 input.pf_end = TSEnd;
109 input.pf_init_bit_stream = InitBitstream;
110 input.pf_set_area = NULL;
111 input.pf_read = TSRead;
112 input.pf_demux = input_DemuxTS;
113 input.pf_new_packet = input_NetlistNewPacket;
114 input.pf_new_pes = input_NetlistNewPES;
115 input.pf_delete_packet = input_NetlistDeletePacket;
116 input.pf_delete_pes = input_NetlistDeletePES;
117 input.pf_rewind = NULL;
118 input.pf_seek = NULL;
122 /*****************************************************************************
123 * TSProbe: verifies that the stream is a TS stream
124 *****************************************************************************/
125 static int TSProbe( probedata_t * p_data )
127 input_thread_t * p_input = (input_thread_t *)p_data;
129 char * psz_name = p_input->p_source;
133 if( TestMethod( INPUT_METHOD_VAR, "ts" ) )
138 if( ( strlen(psz_name) > 3 ) && !strncasecmp( psz_name, "ts:", 3 ) )
140 /* If the user specified "ts:" then it's probably a network stream */
144 if( ( strlen(psz_name) > 5 ) && !strncasecmp( psz_name, "file:", 5 ) )
146 /* If the user specified "file:" then it's probably a file */
150 if( ( strlen(psz_name) > 3 ) &&
151 !strncasecmp( psz_name+strlen(psz_name)-3, ".ts", 3) )
153 /* If it is a ".ts" file it's probably a TS file ... */
157 i_handle = open( psz_name, 0 );
167 /*****************************************************************************
168 * TSInit: initializes TS structures
169 *****************************************************************************/
170 static void TSInit( input_thread_t * p_input )
172 /* Initialize netlist and TS structures */
173 thread_ts_data_t * p_method;
174 es_descriptor_t * p_pat_es;
175 es_ts_data_t * p_demux_data;
176 stream_ts_data_t * p_stream_data;
178 /* Initialise structure */
179 p_method = malloc( sizeof( thread_ts_data_t ) );
180 if( p_method == NULL )
182 intf_ErrMsg( "TS input : Out of memory" );
183 p_input->b_error = 1;
188 p_method->i_length = 0;
189 p_method->i_offset = 0;
192 p_input->p_plugin_data = (void *)p_method;
193 p_input->p_method_data = NULL;
196 /* Initialize netlist */
197 if( input_NetlistInit( p_input, NB_DATA, NB_PES, TS_PACKET_SIZE,
200 intf_ErrMsg( "TS input : Could not initialize netlist" );
204 /* Initialize the stream */
205 input_InitStream( p_input, sizeof( stream_ts_data_t ) );
207 /* input method type */
208 /* FIXME: should test if you have network or file here */
209 p_input->stream.i_method = INPUT_METHOD_NETWORK;
210 p_input->stream.p_selected_area->i_tell = 0;
213 p_stream_data = (stream_ts_data_t *)p_input->stream.p_demux_data;
214 p_stream_data->i_pat_version = PAT_UNINITIALIZED ;
216 /* We'll have to catch the PAT in order to continue
217 * Then the input will catch the PMT and then the others ES
218 * The PAT es is indepedent of any program. */
219 p_pat_es = input_AddES( p_input, NULL,
220 0x00, sizeof( es_ts_data_t ) );
221 p_demux_data=(es_ts_data_t *)p_pat_es->p_demux_data;
222 p_demux_data->b_psi = 1;
223 p_demux_data->i_psi_type = PSI_IS_PAT;
224 p_demux_data->p_psi_section = malloc(sizeof(psi_section_t));
225 p_demux_data->p_psi_section->b_is_complete = 1;
229 /*****************************************************************************
230 * TSFakeOpen: open the stream and set pf_close
231 *****************************************************************************/
232 void TSFakeOpen( input_thread_t * p_input )
234 #if !defined( SYS_BEOS ) && !defined( SYS_NTO )
235 char *psz_name = p_input->p_source;
237 if( ( strlen(psz_name) > 3 ) && !strncasecmp( psz_name, "ts:", 3 ) )
239 /* If the user specified "ts:" he wants a network stream */
240 p_input->pf_open = p_input->pf_network_open;
241 p_input->pf_close = p_input->pf_network_close;
246 p_input->pf_open = p_input->pf_file_open;
247 p_input->pf_close = p_input->pf_file_close;
250 p_input->pf_open( p_input );
253 /*****************************************************************************
254 * TSEnd: frees unused data
255 *****************************************************************************/
256 static void TSEnd( input_thread_t * p_input )
258 es_descriptor_t * p_pat_es;
260 p_pat_es = input_FindES( p_input, 0x00 );
262 if( p_pat_es != NULL )
263 input_DelES( p_input, p_pat_es );
264 free(p_input->p_plugin_data);
267 /*****************************************************************************
268 * TSRead: reads data packets
269 *****************************************************************************
270 * Returns -1 in case of error, 0 if everything went well, and 1 in case of
272 *****************************************************************************/
273 static int TSRead( input_thread_t * p_input,
274 data_packet_t * pp_packets[INPUT_READ_ONCE] )
276 thread_ts_data_t * p_method;
280 struct iovec * p_iovec;
281 struct timeval timeout;
284 p_iovec = input_NetlistGetiovec( p_input->p_method_data );
286 if ( p_iovec == NULL )
288 return( -1 ); /* empty netlist */
292 p_method = ( thread_ts_data_t * )p_input->p_plugin_data;
294 /* Initialize file descriptor set */
295 FD_ZERO( &(p_method->fds) );
296 FD_SET( p_input->i_handle, &(p_method->fds) );
298 /* We'll wait 0.5 second if nothing happens */
300 timeout.tv_usec = 500000;
302 /* Reset pointer table */
303 memset( pp_packets, 0, INPUT_READ_ONCE * sizeof(data_packet_t *) );
305 /* Fill if some data is available */
307 if ( ! p_input->stream.b_pace_control )
310 i_data = select( p_input->i_handle + 1, &p_method->fds,
311 NULL, NULL, &timeout );
316 intf_ErrMsg( "input error: TS select error (%s)", strerror(errno) );
323 if( p_input->stream.b_pace_control )
325 i_read = readv( p_input->i_handle, p_iovec, INPUT_READ_ONCE );
329 i_read = readv_network( p_input->i_handle, p_iovec,
330 INPUT_READ_ONCE, p_method );
333 i_read = readv( p_input->i_handle, p_iovec, INPUT_READ_ONCE );
335 /* Shouldn't happen, but it does - at least under Linux */
336 if( (i_read == -1) && ( (errno == EAGAIN) || (errno = EWOULDBLOCK) ) )
338 /* just ignore that error */
344 intf_ErrMsg( "input error: TS readv error" );
348 input_NetlistMviovec( p_input->p_method_data,
349 (int)(i_read/TS_PACKET_SIZE) , pp_packets );
351 /* check correct TS header */
352 for( i_loop=0; i_loop * TS_PACKET_SIZE < i_read; i_loop++ )
354 if( pp_packets[i_loop]->p_buffer[0] != 0x47 )
355 intf_ErrMsg( "input error: bad TS packet (starts with "
356 "0x%.2x, should be 0x47)",
357 pp_packets[i_loop]->p_buffer[0] );
360 p_input->stream.p_selected_area->i_tell += i_read;