1 /*****************************************************************************
2 * input_ts.c: TS demux and netlist management
3 *****************************************************************************
4 * Copyright (C) 1998, 1999, 2000 VideoLAN
5 * $Id: input_ts.c,v 1.9 2001/03/07 01:36:41 sam Exp $
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>
51 #include "stream_control.h"
52 #include "input_ext-intf.h"
53 #include "input_ext-dec.h"
58 #include "mpeg_system.h"
59 #include "input_netlist.h"
61 /*****************************************************************************
63 *****************************************************************************/
64 static int TSProbe ( probedata_t * );
65 static int TSRead ( struct input_thread_s *,
66 data_packet_t * p_packets[INPUT_READ_ONCE] );
67 static void TSInit ( struct input_thread_s * );
68 static void TSEnd ( struct input_thread_s * );
70 /*****************************************************************************
71 * Functions exported as capabilities. They are declared as static so that
72 * we don't pollute the namespace too much.
73 *****************************************************************************/
74 void _M( input_getfunctions )( function_list_t * p_function_list )
76 #define input p_function_list->functions.input
77 p_function_list->pf_probe = TSProbe;
78 input.pf_init = TSInit;
80 input.pf_open = input_FileOpen;
81 input.pf_close = input_FileClose;
83 input.pf_open = input_NetworkOpen;
84 input.pf_close = input_NetworkClose;
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) > 5 ) && !strncasecmp( psz_name, "file:", 5 ) )
117 /* If the user specified "file:" then it's probably a file */
121 i_handle = open( psz_name, 0 );
131 /*****************************************************************************
132 * TSInit: initializes TS structures
133 *****************************************************************************/
134 static void TSInit( input_thread_t * p_input )
136 /* Initialize netlist and TS structures */
137 thread_ts_data_t * p_method;
138 es_descriptor_t * p_pat_es;
139 es_ts_data_t * p_demux_data;
140 stream_ts_data_t * p_stream_data;
142 /* Initialise structure */
143 p_method = malloc( sizeof( thread_ts_data_t ) );
144 if( p_method == NULL )
146 intf_ErrMsg( "Out of memory" );
147 p_input->b_error = 1;
151 p_input->p_plugin_data = (void *)p_method;
152 p_input->p_method_data = NULL;
155 /* XXX : For the time being, only file, after, i'll do the network */
157 /* Initialize netlist */
158 if( input_NetlistInit( p_input, NB_DATA, NB_PES, TS_PACKET_SIZE,
161 intf_ErrMsg( "Could not initialize netlist" );
165 /* Initialize the stream */
166 input_InitStream( p_input, sizeof( stream_ts_data_t ) );
169 p_stream_data = (stream_ts_data_t *)p_input->stream.p_demux_data;
170 p_stream_data->i_pat_version = PAT_UNINITIALIZED ;
172 /* We'll have to catch the PAT in order to continue
173 * Then the input will catch the PMT and then the others ES
174 * The PAT es is indepedent of any program. */
175 p_pat_es = input_AddES( p_input, NULL,
176 0x00, sizeof( es_ts_data_t ) );
177 p_demux_data=(es_ts_data_t *)p_pat_es->p_demux_data;
178 p_demux_data->b_psi = 1;
179 p_demux_data->i_psi_type = PSI_IS_PAT;
180 p_demux_data->p_psi_section = malloc(sizeof(psi_section_t));
181 p_demux_data->p_psi_section->b_is_complete = 1;
185 /*****************************************************************************
186 * TSEnd: frees unused data
187 *****************************************************************************/
188 static void TSEnd( input_thread_t * p_input )
190 es_descriptor_t * p_pat_es;
192 p_pat_es = input_FindES( p_input, 0x00 );
194 if( p_pat_es != NULL )
195 input_DelES( p_input, p_pat_es );
196 free(p_input->p_plugin_data);
199 /*****************************************************************************
200 * TSRead: reads data packets
201 *****************************************************************************
202 * Returns -1 in case of error, 0 if everything went well, and 1 in case of
204 *****************************************************************************/
205 static int TSRead( input_thread_t * p_input,
206 data_packet_t * pp_packets[INPUT_READ_ONCE] )
208 unsigned int i_read, i_loop;
209 struct iovec * p_iovec;
211 memset( pp_packets, 0, INPUT_READ_ONCE*sizeof(data_packet_t *) );
213 p_iovec = input_NetlistGetiovec( p_input->p_method_data );
215 if ( p_iovec == NULL )
217 return( -1 ); /* empty netlist */
220 i_read = readv( p_input->i_handle, p_iovec, INPUT_READ_ONCE );
223 intf_ErrMsg( "Could not readv" );
227 input_NetlistMviovec( p_input->p_method_data,
228 (int)(i_read/TS_PACKET_SIZE) , pp_packets );
230 /* check correct TS header */
231 for( i_loop=0; i_loop < (int)(i_read/TS_PACKET_SIZE); i_loop++ )
233 if( pp_packets[i_loop]->p_buffer[0] != 0x47 )
234 intf_ErrMsg( "Bad TS Packet (starcode != 0x47)." );