1 /*****************************************************************************
2 * input.c: input thread
3 * Read an MPEG2 stream, demultiplex and parse it before sending it to
5 *****************************************************************************
6 * Copyright (C) 1998-2002 VideoLAN
7 * $Id: input.c,v 1.226 2003/03/24 17:15:30 gbazin Exp $
9 * Authors: Christophe Massiot <massiot@via.ecp.fr>
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 *****************************************************************************/
35 #ifdef HAVE_SYS_TIMES_H
36 # include <sys/times.h>
40 #include "vlc_playlist.h"
42 #include "stream_control.h"
43 #include "input_ext-intf.h"
44 #include "input_ext-dec.h"
45 #include "input_ext-plugins.h"
47 #include "stream_output.h"
49 #include "interface.h"
51 /*****************************************************************************
53 *****************************************************************************/
54 static int RunThread ( input_thread_t *p_input );
55 static int InitThread ( input_thread_t *p_input );
56 static void ErrorThread ( input_thread_t *p_input );
57 static void EndThread ( input_thread_t *p_input );
59 /*****************************************************************************
60 * input_CreateThread: creates a new input thread
61 *****************************************************************************
62 * This function creates a new input, and returns a pointer
63 * to its description. On error, it returns NULL.
64 *****************************************************************************/
65 input_thread_t *__input_CreateThread( vlc_object_t *p_parent,
66 playlist_item_t *p_item )
68 input_thread_t * p_input; /* thread descriptor */
69 input_info_category_t * p_info;
71 /* Allocate descriptor */
72 p_input = vlc_object_create( p_parent, VLC_OBJECT_INPUT );
75 msg_Err( p_parent, "out of memory" );
79 /* Initialize thread properties */
83 p_input->psz_source = strdup( p_item->psz_uri );
86 p_input->p_demux = NULL;
89 p_input->p_access = NULL;
91 p_input->i_bufsize = 0;
93 p_input->i_pts_delay = DEFAULT_PTS_DELAY;
95 /* Initialize statistics */
97 p_input->stream.c_packets_read = 0;
98 p_input->stream.c_packets_trashed = 0;
101 vlc_mutex_init( p_input, &p_input->stream.stream_lock );
102 vlc_cond_init( p_input, &p_input->stream.stream_wait );
103 vlc_mutex_init( p_input, &p_input->stream.control.control_lock );
105 /* Initialize stream description */
106 p_input->stream.b_changed = 0;
107 p_input->stream.i_es_number = 0;
108 p_input->stream.i_selected_es_number = 0;
109 p_input->stream.i_pgrm_number = 0;
110 p_input->stream.i_new_status = p_input->stream.i_new_rate = 0;
111 p_input->stream.b_new_mute = MUTE_NO_CHANGE;
112 p_input->stream.i_mux_rate = 0;
113 p_input->stream.b_seekable = 0;
114 p_input->stream.p_sout = NULL;
116 /* no stream, no program, no area, no es */
117 p_input->stream.p_new_program = NULL;
119 p_input->stream.i_area_nb = 0;
120 p_input->stream.pp_areas = NULL;
121 p_input->stream.p_selected_area = NULL;
122 p_input->stream.p_new_area = NULL;
124 p_input->stream.pp_selected_es = NULL;
125 p_input->stream.p_removed_es = NULL;
126 p_input->stream.p_newly_selected_es = NULL;
128 /* By default there is one area in a stream */
129 input_AddArea( p_input, 0, 1 );
130 p_input->stream.p_selected_area = p_input->stream.pp_areas[0];
132 /* Initialize stream control properties. */
133 p_input->stream.control.i_status = PLAYING_S;
134 p_input->stream.control.i_rate = DEFAULT_RATE;
135 p_input->stream.control.b_mute = 0;
136 p_input->stream.control.b_grayscale = config_GetInt( p_input, "grayscale" );
138 /* Initialize input info */
139 p_input->stream.p_info = malloc( sizeof( input_info_category_t ) );
140 if( !p_input->stream.p_info )
142 msg_Err( p_input, "No memory!" );
145 p_input->stream.p_info->psz_name = strdup("General") ;
146 p_input->stream.p_info->p_info = NULL;
147 p_input->stream.p_info->p_next = NULL;
149 msg_Info( p_input, "playlist item `%s'", p_input->psz_source );
151 p_info = input_InfoCategory( p_input, _("General") );
152 input_AddInfo( p_info, _("Playlist Item"), p_input->psz_source );
153 vlc_object_attach( p_input, p_parent );
155 /* Create thread and wait for its readiness. */
156 if( vlc_thread_create( p_input, "input", RunThread,
157 VLC_THREAD_PRIORITY_INPUT, VLC_TRUE ) )
159 msg_Err( p_input, "cannot create input thread" );
167 /*****************************************************************************
168 * input_StopThread: mark an input thread as zombie
169 *****************************************************************************
170 * This function should not return until the thread is effectively cancelled.
171 *****************************************************************************/
172 void input_StopThread( input_thread_t *p_input )
174 /* Make the thread exit from a possible vlc_cond_wait() */
175 vlc_mutex_lock( &p_input->stream.stream_lock );
176 /* Request thread destruction */
179 vlc_cond_signal( &p_input->stream.stream_wait );
180 vlc_mutex_unlock( &p_input->stream.stream_lock );
183 /*****************************************************************************
184 * input_DestroyThread: mark an input thread as zombie
185 *****************************************************************************
186 * This function should not return until the thread is effectively cancelled.
187 *****************************************************************************/
188 void input_DestroyThread( input_thread_t *p_input )
190 /* Join the thread */
191 vlc_thread_join( p_input );
193 /* Destroy Mutex locks */
194 vlc_mutex_destroy( &p_input->stream.control.control_lock );
195 vlc_cond_destroy( &p_input->stream.stream_wait );
196 vlc_mutex_destroy( &p_input->stream.stream_lock );
199 /*****************************************************************************
200 * RunThread: main thread loop
201 *****************************************************************************
202 * Thread in charge of processing the network packets and demultiplexing.
203 *****************************************************************************/
204 static int RunThread( input_thread_t *p_input )
206 /* Signal right now, otherwise we'll get stuck in a peek */
207 vlc_thread_ready( p_input );
209 if( InitThread( p_input ) )
211 /* If we failed, wait before we are killed, and exit */
212 p_input->b_error = 1;
213 ErrorThread( p_input );
218 /* initialization is complete */
219 vlc_mutex_lock( &p_input->stream.stream_lock );
220 p_input->stream.b_changed = 1;
221 vlc_mutex_unlock( &p_input->stream.stream_lock );
223 while( !p_input->b_die && !p_input->b_error && !p_input->b_eof )
225 unsigned int i, i_count;
229 vlc_mutex_lock( &p_input->stream.stream_lock );
231 if( p_input->stream.p_new_program )
233 if( p_input->pf_set_program != NULL )
236 /* Reinitialize buffer manager. */
237 input_AccessReinit( p_input );
239 p_input->pf_set_program( p_input,
240 p_input->stream.p_new_program );
242 /* Escape all decoders for the stream discontinuity they
244 input_EscapeDiscontinuity( p_input );
246 for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
248 pgrm_descriptor_t * p_pgrm
249 = p_input->stream.pp_programs[i];
251 /* Reinitialize synchro. */
252 p_pgrm->i_synchro_state = SYNCHRO_REINIT;
255 p_input->stream.p_new_program = NULL;
258 if( p_input->stream.p_new_area )
260 if( p_input->stream.b_seekable && p_input->pf_set_area != NULL )
262 input_AccessReinit( p_input );
264 p_input->pf_set_area( p_input, p_input->stream.p_new_area );
266 /* Escape all decoders for the stream discontinuity they
268 input_EscapeDiscontinuity( p_input );
270 for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
272 pgrm_descriptor_t * p_pgrm
273 = p_input->stream.pp_programs[i];
275 /* Reinitialize synchro. */
276 p_pgrm->i_synchro_state = SYNCHRO_REINIT;
279 p_input->stream.p_new_area = NULL;
282 if( p_input->stream.p_selected_area->i_seek != NO_SEEK )
284 if( p_input->stream.b_seekable
285 && p_input->pf_seek != NULL )
289 /* Reinitialize buffer manager. */
290 input_AccessReinit( p_input );
292 i_new_pos = p_input->stream.p_selected_area->i_seek;
293 vlc_mutex_unlock( &p_input->stream.stream_lock );
294 p_input->pf_seek( p_input, i_new_pos );
295 vlc_mutex_lock( &p_input->stream.stream_lock );
297 /* Escape all decoders for the stream discontinuity they
299 input_EscapeDiscontinuity( p_input );
301 for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
303 pgrm_descriptor_t * p_pgrm
304 = p_input->stream.pp_programs[i];
306 /* Reinitialize synchro. */
307 p_pgrm->i_synchro_state = SYNCHRO_REINIT;
310 p_input->stream.p_selected_area->i_seek = NO_SEEK;
313 if( p_input->stream.p_removed_es )
315 input_UnselectES( p_input, p_input->stream.p_removed_es );
316 p_input->stream.p_removed_es = NULL;
319 if( p_input->stream.p_newly_selected_es )
321 input_SelectES( p_input, p_input->stream.p_newly_selected_es );
322 p_input->stream.p_newly_selected_es = NULL;
325 if( p_input->stream.b_new_mute != MUTE_NO_CHANGE )
327 if( p_input->stream.b_new_mute )
329 input_EscapeAudioDiscontinuity( p_input );
332 vlc_mutex_lock( &p_input->stream.control.control_lock );
333 p_input->stream.control.b_mute = p_input->stream.b_new_mute;
334 vlc_mutex_unlock( &p_input->stream.control.control_lock );
336 p_input->stream.b_new_mute = MUTE_NO_CHANGE;
339 vlc_mutex_unlock( &p_input->stream.stream_lock );
341 /* Read and demultiplex some data. */
342 i_count = p_input->pf_demux( p_input );
346 /* End of file - we do not set b_die because only the
347 * playlist is allowed to do so. */
348 msg_Info( p_input, "EOF reached" );
351 else if( i_count < 0 )
353 p_input->b_error = 1;
357 if( p_input->b_error || p_input->b_eof )
359 ErrorThread( p_input );
362 EndThread( p_input );
367 /*****************************************************************************
368 * InitThread: init the input Thread
369 *****************************************************************************/
370 static int InitThread( input_thread_t * p_input )
372 /* Parse source string. Syntax : [[<access>][/<demux>]:][<source>] */
373 char * psz_parser = p_input->psz_dupsource = strdup(p_input->psz_source);
375 /* Skip the plug-in names */
376 while( *psz_parser && *psz_parser != ':' )
380 #if defined( WIN32 ) || defined( UNDER_CE )
381 if( psz_parser - p_input->psz_dupsource == 1 )
383 msg_Warn( p_input, "drive letter %c: found in source string",
384 p_input->psz_dupsource[0] ) ;
391 p_input->psz_access = p_input->psz_demux = "";
392 p_input->psz_name = p_input->psz_source;
393 free( p_input->psz_dupsource );
394 p_input->psz_dupsource = NULL;
398 *psz_parser++ = '\0';
400 /* let's skip '//' */
401 if( psz_parser[0] == '/' && psz_parser[1] == '/' )
406 p_input->psz_name = psz_parser ;
408 /* Come back to parse the access and demux plug-ins */
409 psz_parser = p_input->psz_dupsource;
414 p_input->psz_access = "";
416 else if( *psz_parser == '/' )
419 p_input->psz_access = "";
424 p_input->psz_access = psz_parser;
426 while( *psz_parser && *psz_parser != '/' )
431 if( *psz_parser == '/' )
433 *psz_parser++ = '\0';
440 p_input->psz_demux = "";
444 p_input->psz_demux = psz_parser;
448 msg_Dbg( p_input, "access `%s', demux `%s', name `%s'",
449 p_input->psz_access, p_input->psz_demux, p_input->psz_name );
451 if( input_AccessInit( p_input ) == -1 )
456 /* Find and open appropriate access module */
457 p_input->p_access = module_Need( p_input, "access",
458 p_input->psz_access );
460 if ( p_input->p_access == NULL
461 && (*p_input->psz_demux || *p_input->psz_access) )
463 /* Maybe we got something like :
464 * /Volumes/toto:titi/gabu.mpg */
465 p_input->psz_access = p_input->psz_demux = "";
466 p_input->psz_name = p_input->psz_source;
467 free( p_input->psz_dupsource);
468 p_input->psz_dupsource = NULL;
470 p_input->p_access = module_Need( p_input, "access",
471 p_input->psz_access );
474 if( p_input->p_access == NULL )
476 msg_Err( p_input, "no suitable access module for `%s/%s://%s'",
477 p_input->psz_access, p_input->psz_demux, p_input->psz_name );
481 /* Waiting for stream. */
484 p_input->i_bufsize = p_input->i_mtu;
488 p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE;
491 if( p_input->p_current_data == NULL && p_input->pf_read != NULL )
493 while( !input_FillBuffer( p_input ) )
495 if( p_input->b_die || p_input->b_error || p_input->b_eof )
497 module_Unneed( p_input, p_input->p_access );
503 /* Find and open appropriate demux module */
504 p_input->p_demux = module_Need( p_input, "demux",
505 p_input->psz_demux );
507 if( p_input->p_demux == NULL )
509 msg_Err( p_input, "no suitable demux module for `%s/%s://%s'",
510 p_input->psz_access, p_input->psz_demux, p_input->psz_name );
511 module_Unneed( p_input, p_input->p_access );
515 /* Initialize optional stream output. */
516 psz_parser = config_GetPsz( p_input, "sout" );
517 if ( psz_parser != NULL )
520 (p_input->stream.p_sout = sout_NewInstance( p_input, psz_parser ))
523 msg_Err( p_input, "cannot start stream output instance, aborting" );
525 module_Unneed( p_input, p_input->p_access );
526 module_Unneed( p_input, p_input->p_demux );
536 /*****************************************************************************
537 * ErrorThread: RunThread() error loop
538 *****************************************************************************
539 * This function is called when an error occured during thread main's loop.
540 *****************************************************************************/
541 static void ErrorThread( input_thread_t *p_input )
543 while( !p_input->b_die )
546 msleep( INPUT_IDLE_SLEEP );
550 /*****************************************************************************
551 * EndThread: end the input thread
552 *****************************************************************************/
553 static void EndThread( input_thread_t * p_input )
555 #ifdef HAVE_SYS_TIMES_H
556 /* Display statistics */
557 struct tms cpu_usage;
560 msg_Dbg( p_input, "%ld loops consuming user: %ld, system: %ld",
561 p_input->c_loops, cpu_usage.tms_utime, cpu_usage.tms_stime );
563 msg_Dbg( p_input, "%ld loops", p_input->c_loops );
566 /* Free info structures */
567 msg_Dbg( p_input, "freeing info structures...");
568 input_DelInfo( p_input );
570 input_DumpStream( p_input );
572 /* Free all ES and destroy all decoder threads */
573 input_EndStream( p_input );
575 /* Close optional stream output instance */
576 if ( p_input->stream.p_sout != NULL )
578 sout_DeleteInstance( p_input->stream.p_sout );
581 /* Free demultiplexer's data */
582 module_Unneed( p_input, p_input->p_demux );
584 /* Close the access plug-in */
585 module_Unneed( p_input, p_input->p_access );
587 input_AccessEnd( p_input );
589 free( p_input->psz_source );
590 if ( p_input->psz_dupsource != NULL ) free( p_input->psz_dupsource );
592 /* Tell we're dead */