1 /*****************************************************************************
2 * input_ts.c: TS demux and netlist management
3 *****************************************************************************
4 * Copyright (C) 1998-2001 VideoLAN
5 * $Id: input_ts.c,v 1.2 2001/12/10 04:53:11 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 mpeg_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"
75 #include "stream_control.h"
76 #include "input_ext-intf.h"
77 #include "input_ext-dec.h"
78 #include "input_ext-plugins.h"
83 #include "modules_export.h"
85 /*****************************************************************************
87 *****************************************************************************/
88 static int TSProbe ( probedata_t * );
89 static void TSInit ( struct input_thread_s * );
90 static void TSEnd ( struct input_thread_s * );
91 static int TSRead ( struct input_thread_s *,
92 data_packet_t * p_packets[INPUT_READ_ONCE] );
94 /*****************************************************************************
95 * Functions exported as capabilities. They are declared as static so that
96 * we don't pollute the namespace too much.
97 *****************************************************************************/
98 void _M( input_getfunctions )( function_list_t * p_function_list )
100 #define input p_function_list->functions.input
101 p_function_list->pf_probe = TSProbe;
102 input.pf_init = TSInit;
103 input.pf_open = NULL;
104 input.pf_close = NULL;
105 input.pf_end = TSEnd;
106 input.pf_init_bit_stream = InitBitstream;
107 input.pf_set_area = NULL;
108 input.pf_set_program = input_SetProgram;
109 input.pf_read = TSRead;
110 input.pf_demux = input_DemuxTS;
111 input.pf_new_packet = input_NetlistNewPacket;
112 input.pf_new_pes = input_NetlistNewPES;
113 input.pf_delete_packet = input_NetlistDeletePacket;
114 input.pf_delete_pes = input_NetlistDeletePES;
115 input.pf_rewind = NULL;
116 input.pf_seek = NULL;
120 /*****************************************************************************
121 * TSProbe: verifies that the stream is a TS stream
122 *****************************************************************************/
123 static int TSProbe( probedata_t * p_data )
125 input_thread_t * p_input = (input_thread_t *)p_data;
127 char * psz_name = p_input->p_source;
130 if( TestMethod( INPUT_METHOD_VAR, "ts" ) )
135 if( ( strlen(psz_name) >= 10 && !strncasecmp( psz_name, "udpstream:", 10 ) )
136 || ( strlen(psz_name) >= 4 && !strncasecmp( psz_name, "udp:", 4 ) ) )
138 /* If the user specified "udp:" then it's probably a network stream */
142 if( ( strlen(psz_name) > 5 ) && !strncasecmp( psz_name, "file:", 5 ) )
144 /* If the user specified "file:" then it's probably a file */
148 if( ( strlen(psz_name) > 3 ) &&
149 !strncasecmp( psz_name+strlen(psz_name)-3, ".ts", 3) )
151 /* If it is a ".ts" file it's probably a TS file ... */
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;
179 p_method->i_length = 0;
180 p_method->i_offset = 0;
183 p_input->p_plugin_data = (void *)p_method;
184 p_input->p_method_data = NULL;
187 /* Initialize netlist */
188 if( input_NetlistInit( p_input, NB_DATA, NB_DATA, NB_PES, TS_PACKET_SIZE,
191 intf_ErrMsg( "TS input : Could not initialize netlist" );
195 /* Initialize the stream */
196 input_InitStream( p_input, sizeof( stream_ts_data_t ) );
198 p_input->stream.p_selected_area->i_tell = 0;
201 p_stream_data = (stream_ts_data_t *)p_input->stream.p_demux_data;
202 p_stream_data->i_pat_version = PAT_UNINITIALIZED ;
204 /* We'll have to catch the PAT in order to continue
205 * Then the input will catch the PMT and then the others ES
206 * The PAT es is indepedent of any program. */
207 p_pat_es = input_AddES( p_input, NULL,
208 0x00, sizeof( es_ts_data_t ) );
209 p_demux_data=(es_ts_data_t *)p_pat_es->p_demux_data;
210 p_demux_data->b_psi = 1;
211 p_demux_data->i_psi_type = PSI_IS_PAT;
212 p_demux_data->p_psi_section = malloc(sizeof(psi_section_t));
213 p_demux_data->p_psi_section->b_is_complete = 1;
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 );
229 free(p_input->p_plugin_data);
230 input_NetlistEnd( p_input );
233 /*****************************************************************************
234 * TSRead: reads data packets
235 *****************************************************************************
236 * Returns -1 in case of error, 0 if everything went well, and 1 in case of
238 *****************************************************************************/
239 static int TSRead( input_thread_t * p_input,
240 data_packet_t * pp_packets[INPUT_READ_ONCE] )
242 thread_ts_data_t * p_method;
246 struct iovec * p_iovec;
247 struct timeval timeout;
250 p_method = ( thread_ts_data_t * )p_input->p_plugin_data;
252 /* Initialize file descriptor set */
253 FD_ZERO( &(p_method->fds) );
254 FD_SET( p_input->i_handle, &(p_method->fds) );
256 /* We'll wait 0.5 second if nothing happens */
258 timeout.tv_usec = 500000;
260 /* Reset pointer table */
261 memset( pp_packets, 0, INPUT_READ_ONCE * sizeof(data_packet_t *) );
263 /* Fill if some data is available */
265 if ( ! p_input->stream.b_pace_control )
268 i_data = select( p_input->i_handle + 1, &p_method->fds,
269 NULL, NULL, &timeout );
274 intf_ErrMsg( "input error: TS select error (%s)", strerror(errno) );
281 p_iovec = input_NetlistGetiovec( p_input->p_method_data );
283 if ( p_iovec == NULL )
285 return( -1 ); /* empty netlist */
289 if( p_input->stream.b_pace_control )
291 i_read = readv( p_input->i_handle, p_iovec, INPUT_READ_ONCE );
295 i_read = readv_network( p_input->i_handle, p_iovec,
296 INPUT_READ_ONCE, p_method );
299 i_read = readv( p_input->i_handle, p_iovec, INPUT_READ_ONCE );
301 /* Shouldn't happen, but it does - at least under Linux */
302 if( (i_read == -1) && ( (errno == EAGAIN) || (errno = EWOULDBLOCK) ) )
304 /* just ignore that error */
305 intf_ErrMsg( "input error: 0 bytes read" );
311 intf_ErrMsg( "input error: TS readv error" );
316 if( i_read == 0 && p_input->stream.b_seekable )
321 input_NetlistMviovec( p_input->p_method_data,
322 (int)(((i_read-1)/TS_PACKET_SIZE)+1) , pp_packets );
324 /* check correct TS header */
325 for( i_loop=0; i_loop * TS_PACKET_SIZE < i_read; i_loop++ )
327 if( pp_packets[i_loop]->p_buffer[0] != 0x47 )
328 intf_ErrMsg( "input error: bad TS packet (starts with "
329 "0x%.2x, should be 0x47)",
330 pp_packets[i_loop]->p_buffer[0] );
332 for( ; i_loop < INPUT_READ_ONCE ; i_loop++ )
334 pp_packets[i_loop] = NULL;
337 p_input->stream.p_selected_area->i_tell += i_read;