1 /*****************************************************************************
2 * input_ts.c: TS demux and netlist management
3 *****************************************************************************
4 * Copyright (C) 1998, 1999, 2000 VideoLAN
5 * $Id: input_ts.c,v 1.7 2001/03/05 11:53:44 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;
79 input.pf_open = input_FileOpen;
80 input.pf_close = input_FileClose;
82 input.pf_set_area = NULL;
83 input.pf_read = TSRead;
84 input.pf_demux = input_DemuxTS;
85 input.pf_new_packet = input_NetlistNewPacket;
86 input.pf_new_pes = input_NetlistNewPES;
87 input.pf_delete_packet = input_NetlistDeletePacket;
88 input.pf_delete_pes = input_NetlistDeletePES;
89 input.pf_rewind = NULL;
94 /*****************************************************************************
95 * TSProbe: verifies that the stream is a TS stream
96 *****************************************************************************/
97 static int TSProbe( probedata_t * p_data )
99 input_thread_t * p_input = (input_thread_t *)p_data;
101 char * psz_name = p_input->p_source;
105 if( TestMethod( INPUT_METHOD_VAR, "ts" ) )
110 if( ( strlen(psz_name) > 5 ) && !strncasecmp( psz_name, "file:", 5 ) )
112 /* If the user specified "file:" then it's probably a file */
116 i_handle = open( psz_name, 0 );
126 /*****************************************************************************
127 * TSInit: initializes TS structures
128 *****************************************************************************/
129 static void TSInit( input_thread_t * p_input )
131 /* Initialize netlist and TS structures */
132 thread_ts_data_t * p_method;
133 es_descriptor_t * p_pat_es;
134 es_ts_data_t * p_demux_data;
135 stream_ts_data_t * p_stream_data;
137 /* Initialise structure */
138 p_method = malloc( sizeof( thread_ts_data_t ) );
139 if( p_method == NULL )
141 intf_ErrMsg( "Out of memory" );
142 p_input->b_error = 1;
146 p_input->p_plugin_data = (void *)p_method;
147 p_input->p_method_data = NULL;
150 /* XXX : For the time being, only file, after, i'll do the network */
152 /* Initialize netlist */
153 if( input_NetlistInit( p_input, NB_DATA, NB_PES, TS_PACKET_SIZE,
156 intf_ErrMsg( "Could not initialize netlist" );
160 /* Initialize the stream */
161 input_InitStream( p_input, sizeof( stream_ts_data_t ) );
164 p_stream_data = (stream_ts_data_t *)p_input->stream.p_demux_data;
165 p_stream_data->i_pat_version = PAT_UNINITIALIZED ;
167 /* We'll have to catch the PAT in order to continue
168 * Then the input will catch the PMT and then the others ES
169 * The PAT es is indepedent of any program. */
170 p_pat_es = input_AddES( p_input, NULL,
171 0x00, sizeof( es_ts_data_t ) );
172 p_demux_data=(es_ts_data_t *)p_pat_es->p_demux_data;
173 p_demux_data->b_psi = 1;
174 p_demux_data->i_psi_type = PSI_IS_PAT;
175 p_demux_data->p_psi_section = malloc(sizeof(psi_section_t));
176 p_demux_data->p_psi_section->b_is_complete = 1;
180 /*****************************************************************************
181 * TSEnd: frees unused data
182 *****************************************************************************/
183 static void TSEnd( input_thread_t * p_input )
185 es_descriptor_t * p_pat_es;
187 p_pat_es = input_FindES( p_input, 0x00 );
189 if( p_pat_es != NULL )
190 input_DelES( p_input, p_pat_es );
191 free(p_input->p_plugin_data);
194 /*****************************************************************************
195 * TSRead: reads data packets
196 *****************************************************************************
197 * Returns -1 in case of error, 0 if everything went well, and 1 in case of
199 *****************************************************************************/
200 static int TSRead( input_thread_t * p_input,
201 data_packet_t * pp_packets[INPUT_READ_ONCE] )
203 unsigned int i_read, i_loop;
204 struct iovec * p_iovec;
206 memset( pp_packets, 0, INPUT_READ_ONCE*sizeof(data_packet_t *) );
208 p_iovec = input_NetlistGetiovec( p_input->p_method_data );
210 if ( p_iovec == NULL )
212 return( -1 ); /* empty netlist */
215 i_read = readv( p_input->i_handle, p_iovec, INPUT_READ_ONCE );
219 intf_ErrMsg( "Could not readv" );
223 input_NetlistMviovec( p_input->p_method_data,
224 (int)(i_read/TS_PACKET_SIZE) , pp_packets );
226 /* check correct TS header */
227 for( i_loop=0; i_loop < (int)(i_read/TS_PACKET_SIZE); i_loop++ )
229 if( pp_packets[i_loop]->p_buffer[0] != 0x47 )
230 intf_ErrMsg( "Bad TS Packet (starcode != 0x47)." );