1 /*****************************************************************************
2 * input.c: input thread
3 * Read an MPEG2 stream, demultiplex and parse it before sending it to
5 *****************************************************************************
6 * Copyright (C) 1998, 1999, 2000 VideoLAN
7 * $Id: input.c,v 1.64 2000/12/22 13:04:44 sam Exp $
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
24 *****************************************************************************/
26 /*****************************************************************************
28 *****************************************************************************/
32 #include <sys/types.h>
40 # include <sys/times.h>
50 #include "stream_control.h"
51 #include "input_ext-intf.h"
52 #include "input_ext-dec.h"
56 /*****************************************************************************
58 *****************************************************************************/
59 static void RunThread ( input_thread_t *p_input );
60 static void InitThread ( input_thread_t *p_input );
61 static void ErrorThread ( input_thread_t *p_input );
62 static void EndThread ( input_thread_t *p_input );
63 static void NetworkOpen ( input_thread_t *p_input );
64 static void FileOpen ( input_thread_t *p_input );
66 /*****************************************************************************
67 * input_CreateThread: creates a new input thread
68 *****************************************************************************
69 * This function creates a new input, and returns a pointer
70 * to its description. On error, it returns NULL.
71 * If pi_status is NULL, then the function will block until the thread is ready.
72 * If not, it will be updated using one of the THREAD_* constants.
73 *****************************************************************************/
74 input_thread_t *input_CreateThread ( input_config_t * p_config, int *pi_status )
76 input_thread_t * p_input; /* thread descriptor */
77 int i_status; /* thread status */
79 /* Allocate descriptor */
80 p_input = (input_thread_t *)malloc( sizeof(input_thread_t) );
83 intf_ErrMsg("error: %s", strerror(errno));
88 /* Initialize thread properties */
91 /* I have never understood that stuff --Meuuh */
92 p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
93 *p_input->pi_status = THREAD_CREATE;
94 p_input->p_config = p_config;
96 /* Initialize stream description */
97 p_input->stream.i_es_number = 0;
98 p_input->stream.i_selected_es_number = 0;
99 p_input->stream.i_pgrm_number = 0;
101 /* Initialize stream control properties. */
102 p_input->stream.control.i_status = PLAYING_S;
103 p_input->stream.control.i_rate = DEFAULT_RATE;
104 p_input->stream.control.i_ref_sysdate = 0;
105 p_input->stream.control.i_ref_clock = 0;
106 p_input->stream.control.b_mute = 0;
107 p_input->stream.control.b_bw = 0;
109 /* Create thread and set locks. */
110 vlc_mutex_init( &p_input->stream.stream_lock );
111 vlc_mutex_init( &p_input->stream.control.control_lock );
112 if( vlc_thread_create( &p_input->thread_id, "input", (void *) RunThread,
115 intf_ErrMsg("error: %s", strerror(errno) );
121 /* If status is NULL, wait until the thread is created */
122 if( pi_status == NULL )
126 msleep( THREAD_SLEEP );
127 } while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR)
128 && (i_status != THREAD_FATAL) );
129 if( i_status != THREAD_READY )
137 /*****************************************************************************
138 * input_DestroyThread: mark an input thread as zombie
139 *****************************************************************************
140 * This function should not return until the thread is effectively cancelled.
141 *****************************************************************************/
142 void input_DestroyThread( input_thread_t *p_input, int *pi_status )
144 int i_status; /* thread status */
147 p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
148 *p_input->pi_status = THREAD_DESTROY;
150 /* Request thread destruction */
153 /* If status is NULL, wait until thread has been destroyed */
154 if( pi_status == NULL )
158 msleep( THREAD_SLEEP );
159 } while ( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR)
160 && (i_status != THREAD_FATAL) );
164 /*****************************************************************************
165 * RunThread: main thread loop
166 *****************************************************************************
167 * Thread in charge of processing the network packets and demultiplexing.
168 *****************************************************************************/
169 static void RunThread( input_thread_t *p_input )
171 data_packet_t * pp_packets[INPUT_READ_ONCE];
174 InitThread( p_input );
176 while( !p_input->b_die && !p_input->b_error )
182 vlc_mutex_lock( &p_input->stream.control.control_lock );
183 if( p_input->stream.control.i_status == BACKWARD_S
184 && p_input->p_plugin->pf_rewind != NULL )
186 p_input->p_plugin->pf_rewind( p_input );
187 /* FIXME: probably don't do it every loop, but when ? */
189 vlc_mutex_unlock( &p_input->stream.control.control_lock );
191 i_error = p_input->p_plugin->pf_read( p_input, pp_packets );
193 /* Demultiplex read packets. */
194 for( i = 0; i < INPUT_READ_ONCE && pp_packets[i] != NULL; i++ )
196 p_input->p_plugin->pf_demux( p_input, pp_packets[i] );
204 intf_WarnMsg( 1, "End of file reached" );
205 /* FIXME: don't treat that as an error */
207 p_input->b_error = 1;
211 if( p_input->b_error )
213 ErrorThread( p_input );
216 EndThread( p_input );
217 intf_DbgMsg("Thread end");
220 /*****************************************************************************
221 * InitThread: init the input thread
222 *****************************************************************************/
223 input_capabilities_t * PSKludge( void );
224 static void InitThread( input_thread_t * p_input )
226 /* Initialize default settings for spawned decoders */
227 p_input->p_default_aout = p_input->p_config->p_default_aout;
228 p_input->p_default_vout = p_input->p_config->p_default_vout;
231 /* Initialize statistics */
232 p_input->c_loops = 0;
233 p_input->c_bytes = 0;
234 p_input->c_payload_bytes = 0;
235 p_input->c_packets_read = 0;
236 p_input->c_packets_trashed = 0;
239 /* Use the appropriate input method */
240 switch( p_input->p_config->i_method )
242 case INPUT_METHOD_FILE: /* file methods */
245 case INPUT_METHOD_VLAN_BCAST: /* vlan network method */
246 /* if( !p_main->b_vlans )
248 intf_ErrMsg("error: vlans are not activated");
252 /* ... pass through */
253 case INPUT_METHOD_UCAST: /* network methods */
254 case INPUT_METHOD_MCAST:
255 case INPUT_METHOD_BCAST:
256 NetworkOpen( p_input );
260 intf_ErrMsg("Unknow input method");
261 free( p_input->p_config );
262 p_input->b_error = 1;
267 free( p_input->p_config );
269 /* Probe plugin (FIXME: load plugins before & write this) */
270 p_input->p_plugin = PSKludge();
271 p_input->p_plugin->pf_init( p_input );
273 *p_input->pi_status = THREAD_READY;
276 /*****************************************************************************
277 * ErrorThread: RunThread() error loop
278 *****************************************************************************
279 * This function is called when an error occured during thread main's loop.
280 *****************************************************************************/
281 static void ErrorThread( input_thread_t *p_input )
283 while( !p_input->b_die )
286 msleep( INPUT_IDLE_SLEEP );
290 /*****************************************************************************
291 * EndThread: end the input thread
292 *****************************************************************************/
293 static void EndThread( input_thread_t * p_input )
295 int * pi_status; /* thread status */
298 pi_status = p_input->pi_status;
299 *pi_status = THREAD_END;
303 struct tms cpu_usage;
306 intf_Msg("input stats: cpu usage (user: %d, system: %d)",
307 cpu_usage.tms_utime, cpu_usage.tms_stime);
311 /* Free all ES and destroy all decoder threads */
312 input_EndStream( p_input );
314 /* Free demultiplexer's data */
315 p_input->p_plugin->pf_end( p_input );
316 free( p_input->p_plugin );
318 /* Free input structure */
322 *pi_status = THREAD_OVER;
325 /*****************************************************************************
326 * NetworkOpen : open a network socket descriptor
327 *****************************************************************************/
328 static void NetworkOpen( input_thread_t * p_input )
330 /* straight copy & paste of input_network.c of input-I */
332 /* We cannot rewind nor lseek() */
333 p_input->stream.b_seekable = 0;
334 /* We cannot control the pace */
335 p_input->stream.b_pace_control = 0;
338 /*****************************************************************************
339 * FileOpen : open a file descriptor
340 *****************************************************************************/
341 static void FileOpen( input_thread_t * p_input )
343 struct stat stat_info;
345 #define p_config p_input->p_config
347 if( !strncmp( p_config->p_source, "-", 1 ) )
350 p_input->i_handle = 0;
352 vlc_mutex_lock( &p_input->stream.stream_lock );
353 p_input->stream.b_pace_control = 1;
354 p_input->stream.b_seekable = 0;
355 p_input->stream.i_size = 0;
356 p_input->stream.i_tell = 0;
357 vlc_mutex_unlock( &p_input->stream.stream_lock );
361 if( stat( p_config->p_source, &stat_info ) == (-1) )
363 intf_ErrMsg("Cannot stat() file %s (%s)", p_config->p_source,
365 p_input->b_error = 1;
369 vlc_mutex_lock( &p_input->stream.stream_lock );
371 /* If we are here we can control the pace... */
372 p_input->stream.b_pace_control = 1;
374 if( S_ISREG(stat_info.st_mode) || S_ISCHR(stat_info.st_mode)
375 || S_ISBLK(stat_info.st_mode) )
377 p_input->stream.b_seekable = 1;
378 p_input->stream.i_size = stat_info.st_size;
380 else if( S_ISFIFO(stat_info.st_mode) || S_ISSOCK(stat_info.st_mode) )
382 p_input->stream.b_seekable = 0;
383 p_input->stream.i_size = 0;
387 vlc_mutex_unlock( &p_input->stream.stream_lock );
388 intf_ErrMsg("Unknown file type");
389 p_input->b_error = 1;
393 p_input->stream.i_tell = 0;
394 vlc_mutex_unlock( &p_input->stream.stream_lock );
396 intf_Msg( "Opening file %s", p_config->p_source );
397 if( (p_input->i_handle = open( p_config->p_source,
398 /*O_NONBLOCK | O_LARGEFILE*/0 )) == (-1) )
400 intf_ErrMsg("Cannot open file (%s)", strerror(errno));
401 p_input->b_error = 1;