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 1.84 2001/02/19 19:08:59 massiot 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 *****************************************************************************/
32 #include <sys/types.h>
40 # include <sys/times.h>
50 #include "intf_plst.h"
52 #include "stream_control.h"
53 #include "input_ext-intf.h"
54 #include "input_ext-dec.h"
57 #include "interface.h"
61 /*****************************************************************************
63 *****************************************************************************/
64 static void RunThread ( input_thread_t *p_input );
65 static int InitThread ( input_thread_t *p_input );
66 static void ErrorThread ( input_thread_t *p_input );
67 static void DestroyThread ( input_thread_t *p_input );
68 static void EndThread ( input_thread_t *p_input );
70 /*****************************************************************************
71 * input_CreateThread: creates a new input thread
72 *****************************************************************************
73 * This function creates a new input, and returns a pointer
74 * to its description. On error, it returns NULL.
75 * If pi_status is NULL, then the function will block until the thread is ready.
76 * If not, it will be updated using one of the THREAD_* constants.
77 *****************************************************************************/
78 input_thread_t *input_CreateThread ( playlist_item_t *p_item, int *pi_status )
80 input_thread_t * p_input; /* thread descriptor */
81 int i_status; /* thread status */
83 /* Allocate descriptor */
84 p_input = (input_thread_t *)malloc( sizeof(input_thread_t) );
87 intf_ErrMsg( "input error: can't allocate input thread (%s)",
92 /* Initialize thread properties */
98 p_input->p_source = p_item->psz_name;
100 /* I have never understood that stuff --Meuuh */
101 p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
102 *p_input->pi_status = THREAD_CREATE;
104 /* Initialize stream description */
105 p_input->stream.i_es_number = 0;
106 p_input->stream.i_selected_es_number = 0;
107 p_input->stream.i_pgrm_number = 0;
108 p_input->stream.i_new_status = p_input->stream.i_new_rate = 0;
109 p_input->stream.i_seek = NO_SEEK;
110 p_input->stream.i_mux_rate = 0;
112 /* Initialize stream control properties. */
113 p_input->stream.control.i_status = PLAYING_S;
114 p_input->stream.control.i_rate = DEFAULT_RATE;
115 p_input->stream.control.b_mute = 0;
116 p_input->stream.control.b_bw = 0;
118 /* Initialize default settings for spawned decoders */
119 p_input->p_default_aout = p_main->p_aout;
120 p_input->p_default_vout = p_main->p_vout;
122 /* Create thread and set locks. */
123 vlc_mutex_init( &p_input->stream.stream_lock );
124 vlc_cond_init( &p_input->stream.stream_wait );
125 vlc_mutex_init( &p_input->stream.control.control_lock );
126 if( vlc_thread_create( &p_input->thread_id, "input", (void *) RunThread,
129 intf_ErrMsg( "input error: can't create input thread (%s)",
135 /* If status is NULL, wait until the thread is created */
136 if( pi_status == NULL )
140 msleep( THREAD_SLEEP );
141 } while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR)
142 && (i_status != THREAD_FATAL) );
143 if( i_status != THREAD_READY )
151 /*****************************************************************************
152 * input_DestroyThread: mark an input thread as zombie
153 *****************************************************************************
154 * This function should not return until the thread is effectively cancelled.
155 *****************************************************************************/
156 void input_DestroyThread( input_thread_t *p_input, int *pi_status )
158 int i_status; /* thread status */
161 p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
162 *p_input->pi_status = THREAD_DESTROY;
164 /* Request thread destruction */
167 /* Make the thread exit of an eventual vlc_cond_wait() */
168 vlc_mutex_lock( &p_input->stream.stream_lock );
169 vlc_cond_signal( &p_input->stream.stream_wait );
170 vlc_mutex_unlock( &p_input->stream.stream_lock );
172 /* If status is NULL, wait until thread has been destroyed */
173 if( pi_status == NULL )
177 msleep( THREAD_SLEEP );
178 } while ( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR)
179 && (i_status != THREAD_FATAL) );
183 /*****************************************************************************
184 * RunThread: main thread loop
185 *****************************************************************************
186 * Thread in charge of processing the network packets and demultiplexing.
187 *****************************************************************************/
188 static void RunThread( input_thread_t *p_input )
190 data_packet_t * pp_packets[INPUT_READ_ONCE];
193 if( InitThread( p_input ) )
196 /* If we failed, wait before we are killed, and exit */
197 *p_input->pi_status = THREAD_ERROR;
198 p_input->b_error = 1;
199 ErrorThread( p_input );
200 DestroyThread( p_input );
204 while( !p_input->b_die && !p_input->b_error && !p_input->b_eof )
211 vlc_mutex_lock( &p_input->stream.stream_lock );
212 if( p_input->stream.i_seek != NO_SEEK )
214 if( p_input->stream.b_seekable && p_input->pf_seek != NULL )
216 p_input->pf_seek( p_input, p_input->stream.i_seek );
218 for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
220 pgrm_descriptor_t * p_pgrm
221 = p_input->stream.pp_programs[i];
222 /* Escape all decoders for the stream discontinuity they
224 input_EscapeDiscontinuity( p_input, p_pgrm );
226 /* Reinitialize synchro. */
227 p_pgrm->i_synchro_state = SYNCHRO_REINIT;
230 p_input->stream.i_seek = NO_SEEK;
232 vlc_mutex_unlock( &p_input->stream.stream_lock );
234 i_error = p_input->pf_read( p_input, pp_packets );
236 /* Demultiplex read packets. */
237 for( i = 0; i < INPUT_READ_ONCE && pp_packets[i] != NULL; i++ )
239 p_input->pf_demux( p_input, pp_packets[i] );
246 /* End of file - we do not set b_die because only the
247 * interface is allowed to do so. */
248 intf_WarnMsg( 1, "End of file reached" );
253 p_input->b_error = 1;
258 if( p_input->b_error || p_input->b_eof )
260 ErrorThread( p_input );
263 EndThread( p_input );
265 DestroyThread( p_input );
267 intf_DbgMsg("Thread end");
270 /*****************************************************************************
271 * InitThread: init the input Thread
272 *****************************************************************************/
273 static int InitThread( input_thread_t * p_input )
277 /* Initialize statistics */
278 p_input->c_loops = 0;
279 p_input->c_bytes = 0;
280 p_input->c_payload_bytes = 0;
281 p_input->c_packets_read = 0;
282 p_input->c_packets_trashed = 0;
285 p_input->p_input_module = module_Need( p_main->p_bank,
286 MODULE_CAPABILITY_INPUT,
287 (probedata_t *)p_input );
289 if( p_input->p_input_module == NULL )
291 intf_ErrMsg( "input error: no suitable input module" );
292 module_Unneed( p_main->p_bank, p_input->p_input_module );
296 #define f p_input->p_input_module->p_functions->input.functions.input
297 p_input->pf_init = f.pf_init;
298 p_input->pf_open = f.pf_open;
299 p_input->pf_close = f.pf_close;
300 p_input->pf_end = f.pf_end;
301 p_input->pf_read = f.pf_read;
302 p_input->pf_demux = f.pf_demux;
303 p_input->pf_new_packet = f.pf_new_packet;
304 p_input->pf_new_pes = f.pf_new_pes;
305 p_input->pf_delete_packet = f.pf_delete_packet;
306 p_input->pf_delete_pes = f.pf_delete_pes;
307 p_input->pf_rewind = f.pf_rewind;
308 p_input->pf_seek = f.pf_seek;
311 p_input->pf_open( p_input );
313 if( p_input->b_error )
315 /* We barfed -- exit nicely */
316 p_input->pf_close( p_input );
317 module_Unneed( p_main->p_bank, p_input->p_input_module );
321 p_input->pf_init( p_input );
323 *p_input->pi_status = THREAD_READY;
328 /*****************************************************************************
329 * ErrorThread: RunThread() error loop
330 *****************************************************************************
331 * This function is called when an error occured during thread main's loop.
332 *****************************************************************************/
333 static void ErrorThread( input_thread_t *p_input )
335 while( !p_input->b_die )
338 msleep( INPUT_IDLE_SLEEP );
342 /*****************************************************************************
343 * EndThread: end the input thread
344 *****************************************************************************/
345 static void EndThread( input_thread_t * p_input )
347 int * pi_status; /* thread status */
350 pi_status = p_input->pi_status;
351 *pi_status = THREAD_END;
355 struct tms cpu_usage;
358 intf_Msg("input stats: cpu usage (user: %d, system: %d)",
359 cpu_usage.tms_utime, cpu_usage.tms_stime);
363 /* Free all ES and destroy all decoder threads */
364 input_EndStream( p_input );
366 /* Free demultiplexer's data */
367 p_input->pf_end( p_input );
370 p_input->pf_close( p_input );
372 /* Release modules */
373 module_Unneed( p_main->p_bank, p_input->p_input_module );
377 /*****************************************************************************
378 * DestroyThread: destroy the input thread
379 *****************************************************************************/
380 static void DestroyThread( input_thread_t * p_input )
382 int * pi_status; /* thread status */
385 pi_status = p_input->pi_status;
387 /* Destroy Mutex locks */
388 vlc_mutex_destroy( &p_input->stream.control.control_lock );
389 vlc_mutex_destroy( &p_input->stream.stream_lock );
391 /* Free input structure */
395 *pi_status = THREAD_OVER;
398 /*****************************************************************************
399 * input_FileOpen : open a file descriptor
400 *****************************************************************************/
401 void input_FileOpen( input_thread_t * p_input )
403 struct stat stat_info;
406 char *psz_name = p_input->p_source;
408 /* FIXME: this code ought to be in the plugin so that code can
409 * be shared with the *_Probe function */
410 if( ( i_stat = stat( psz_name, &stat_info ) ) == (-1) )
412 int i_size = strlen( psz_name );
415 && !strncasecmp( psz_name, "dvd:", 4 ) )
417 /* get rid of the 'dvd:' stuff and try again */
419 i_stat = stat( psz_name, &stat_info );
421 else if( ( i_size > 5 )
422 && !strncasecmp( psz_name, "file:", 5 ) )
424 /* get rid of the 'file:' stuff and try again */
426 i_stat = stat( psz_name, &stat_info );
431 intf_ErrMsg( "input error: cannot stat() file `%s' (%s)",
432 psz_name, strerror(errno));
433 p_input->b_error = 1;
438 vlc_mutex_lock( &p_input->stream.stream_lock );
440 /* If we are here we can control the pace... */
441 p_input->stream.b_pace_control = 1;
443 if( S_ISREG(stat_info.st_mode) || S_ISCHR(stat_info.st_mode)
444 || S_ISBLK(stat_info.st_mode) )
446 p_input->stream.b_seekable = 1;
447 p_input->stream.i_size = stat_info.st_size;
449 else if( S_ISFIFO(stat_info.st_mode)
451 || S_ISSOCK(stat_info.st_mode)
455 p_input->stream.b_seekable = 0;
456 p_input->stream.i_size = 0;
460 vlc_mutex_unlock( &p_input->stream.stream_lock );
461 intf_ErrMsg( "input error: unknown file type for `%s'",
463 p_input->b_error = 1;
467 p_input->stream.i_tell = 0;
468 vlc_mutex_unlock( &p_input->stream.stream_lock );
470 intf_Msg( "input: opening %s", p_input->p_source );
471 if( (p_input->i_handle = open( psz_name,
472 /*O_NONBLOCK | O_LARGEFILE*/0 )) == (-1) )
474 intf_ErrMsg( "input error: cannot open file (%s)", strerror(errno) );
475 p_input->b_error = 1;
481 /*****************************************************************************
482 * input_FileClose : close a file descriptor
483 *****************************************************************************/
484 void input_FileClose( input_thread_t * p_input )
486 close( p_input->i_handle );