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 1.85 2001/02/20 02:53:13 stef 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_mux_rate = 0;
111 p_input->stream.i_area_nb = 0;
112 p_input->stream.pp_areas = NULL;
113 /* By default there is one areas in a stream */
114 input_AddArea( p_input );
115 p_input->stream.pp_areas[0]->i_seek = NO_SEEK;
117 /* Initialize stream control properties. */
118 p_input->stream.control.i_status = PLAYING_S;
119 p_input->stream.control.i_rate = DEFAULT_RATE;
120 p_input->stream.control.b_mute = 0;
121 p_input->stream.control.b_bw = 0;
123 /* Initialize default settings for spawned decoders */
124 p_input->p_default_aout = p_main->p_aout;
125 p_input->p_default_vout = p_main->p_vout;
127 /* Create thread and set locks. */
128 vlc_mutex_init( &p_input->stream.stream_lock );
129 vlc_cond_init( &p_input->stream.stream_wait );
130 vlc_mutex_init( &p_input->stream.control.control_lock );
131 if( vlc_thread_create( &p_input->thread_id, "input", (void *) RunThread,
134 intf_ErrMsg( "input error: can't create input thread (%s)",
140 /* If status is NULL, wait until the thread is created */
141 if( pi_status == NULL )
145 msleep( THREAD_SLEEP );
146 } while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR)
147 && (i_status != THREAD_FATAL) );
148 if( i_status != THREAD_READY )
156 /*****************************************************************************
157 * input_DestroyThread: mark an input thread as zombie
158 *****************************************************************************
159 * This function should not return until the thread is effectively cancelled.
160 *****************************************************************************/
161 void input_DestroyThread( input_thread_t *p_input, int *pi_status )
163 int i_status; /* thread status */
166 p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
167 *p_input->pi_status = THREAD_DESTROY;
169 /* Request thread destruction */
172 /* Make the thread exit of an eventual vlc_cond_wait() */
173 vlc_mutex_lock( &p_input->stream.stream_lock );
174 vlc_cond_signal( &p_input->stream.stream_wait );
175 vlc_mutex_unlock( &p_input->stream.stream_lock );
177 /* If status is NULL, wait until thread has been destroyed */
178 if( pi_status == NULL )
182 msleep( THREAD_SLEEP );
183 } while ( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR)
184 && (i_status != THREAD_FATAL) );
188 /*****************************************************************************
189 * RunThread: main thread loop
190 *****************************************************************************
191 * Thread in charge of processing the network packets and demultiplexing.
192 *****************************************************************************/
193 static void RunThread( input_thread_t *p_input )
195 data_packet_t * pp_packets[INPUT_READ_ONCE];
198 if( InitThread( p_input ) )
201 /* If we failed, wait before we are killed, and exit */
202 *p_input->pi_status = THREAD_ERROR;
203 p_input->b_error = 1;
204 ErrorThread( p_input );
205 DestroyThread( p_input );
209 while( !p_input->b_die && !p_input->b_error && !p_input->b_eof )
216 vlc_mutex_lock( &p_input->stream.stream_lock );
217 if( p_input->stream.pp_areas[0]->i_seek != NO_SEEK )
219 if( p_input->stream.b_seekable && p_input->pf_seek != NULL )
221 p_input->pf_seek( p_input, p_input->stream.pp_areas[0]->i_seek );
223 for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
225 pgrm_descriptor_t * p_pgrm
226 = p_input->stream.pp_programs[i];
227 /* Escape all decoders for the stream discontinuity they
229 input_EscapeDiscontinuity( p_input, p_pgrm );
231 /* Reinitialize synchro. */
232 p_pgrm->i_synchro_state = SYNCHRO_REINIT;
235 p_input->stream.pp_areas[0]->i_seek = NO_SEEK;
237 vlc_mutex_unlock( &p_input->stream.stream_lock );
239 i_error = p_input->pf_read( p_input, pp_packets );
241 /* Demultiplex read packets. */
242 for( i = 0; i < INPUT_READ_ONCE && pp_packets[i] != NULL; i++ )
244 p_input->pf_demux( p_input, pp_packets[i] );
251 /* End of file - we do not set b_die because only the
252 * interface is allowed to do so. */
253 intf_WarnMsg( 1, "End of file reached" );
258 p_input->b_error = 1;
263 if( p_input->b_error || p_input->b_eof )
265 ErrorThread( p_input );
268 EndThread( p_input );
270 DestroyThread( p_input );
272 intf_DbgMsg("Thread end");
275 /*****************************************************************************
276 * InitThread: init the input Thread
277 *****************************************************************************/
278 static int InitThread( input_thread_t * p_input )
282 /* Initialize statistics */
283 p_input->c_loops = 0;
284 p_input->c_bytes = 0;
285 p_input->c_payload_bytes = 0;
286 p_input->c_packets_read = 0;
287 p_input->c_packets_trashed = 0;
290 p_input->p_input_module = module_Need( p_main->p_bank,
291 MODULE_CAPABILITY_INPUT,
292 (probedata_t *)p_input );
294 if( p_input->p_input_module == NULL )
296 intf_ErrMsg( "input error: no suitable input module" );
297 module_Unneed( p_main->p_bank, p_input->p_input_module );
301 #define f p_input->p_input_module->p_functions->input.functions.input
302 p_input->pf_init = f.pf_init;
303 p_input->pf_open = f.pf_open;
304 p_input->pf_close = f.pf_close;
305 p_input->pf_end = f.pf_end;
306 p_input->pf_read = f.pf_read;
307 p_input->pf_demux = f.pf_demux;
308 p_input->pf_new_packet = f.pf_new_packet;
309 p_input->pf_new_pes = f.pf_new_pes;
310 p_input->pf_delete_packet = f.pf_delete_packet;
311 p_input->pf_delete_pes = f.pf_delete_pes;
312 p_input->pf_rewind = f.pf_rewind;
313 p_input->pf_seek = f.pf_seek;
316 p_input->pf_open( p_input );
318 if( p_input->b_error )
320 /* We barfed -- exit nicely */
321 p_input->pf_close( p_input );
322 module_Unneed( p_main->p_bank, p_input->p_input_module );
326 p_input->pf_init( p_input );
328 *p_input->pi_status = THREAD_READY;
333 /*****************************************************************************
334 * ErrorThread: RunThread() error loop
335 *****************************************************************************
336 * This function is called when an error occured during thread main's loop.
337 *****************************************************************************/
338 static void ErrorThread( input_thread_t *p_input )
340 while( !p_input->b_die )
343 msleep( INPUT_IDLE_SLEEP );
347 /*****************************************************************************
348 * EndThread: end the input thread
349 *****************************************************************************/
350 static void EndThread( input_thread_t * p_input )
352 int * pi_status; /* thread status */
355 pi_status = p_input->pi_status;
356 *pi_status = THREAD_END;
360 struct tms cpu_usage;
363 intf_Msg("input stats: cpu usage (user: %d, system: %d)",
364 cpu_usage.tms_utime, cpu_usage.tms_stime);
368 /* Free all ES and destroy all decoder threads */
369 input_EndStream( p_input );
371 /* Free demultiplexer's data */
372 p_input->pf_end( p_input );
375 p_input->pf_close( p_input );
377 /* Release modules */
378 module_Unneed( p_main->p_bank, p_input->p_input_module );
382 /*****************************************************************************
383 * DestroyThread: destroy the input thread
384 *****************************************************************************/
385 static void DestroyThread( input_thread_t * p_input )
387 int * pi_status; /* thread status */
390 pi_status = p_input->pi_status;
392 /* Destroy Mutex locks */
393 vlc_mutex_destroy( &p_input->stream.control.control_lock );
394 vlc_mutex_destroy( &p_input->stream.stream_lock );
396 /* Free input structure */
400 *pi_status = THREAD_OVER;
403 /*****************************************************************************
404 * input_FileOpen : open a file descriptor
405 *****************************************************************************/
406 void input_FileOpen( input_thread_t * p_input )
408 struct stat stat_info;
411 char *psz_name = p_input->p_source;
413 /* FIXME: this code ought to be in the plugin so that code can
414 * be shared with the *_Probe function */
415 if( ( i_stat = stat( psz_name, &stat_info ) ) == (-1) )
417 int i_size = strlen( psz_name );
420 && !strncasecmp( psz_name, "dvd:", 4 ) )
422 /* get rid of the 'dvd:' stuff and try again */
424 i_stat = stat( psz_name, &stat_info );
426 else if( ( i_size > 5 )
427 && !strncasecmp( psz_name, "file:", 5 ) )
429 /* get rid of the 'file:' stuff and try again */
431 i_stat = stat( psz_name, &stat_info );
436 intf_ErrMsg( "input error: cannot stat() file `%s' (%s)",
437 psz_name, strerror(errno));
438 p_input->b_error = 1;
443 vlc_mutex_lock( &p_input->stream.stream_lock );
445 /* If we are here we can control the pace... */
446 p_input->stream.b_pace_control = 1;
448 if( S_ISREG(stat_info.st_mode) || S_ISCHR(stat_info.st_mode)
449 || S_ISBLK(stat_info.st_mode) )
451 p_input->stream.b_seekable = 1;
452 p_input->stream.pp_areas[0]->i_size = stat_info.st_size;
454 else if( S_ISFIFO(stat_info.st_mode)
456 || S_ISSOCK(stat_info.st_mode)
460 p_input->stream.b_seekable = 0;
461 p_input->stream.pp_areas[0]->i_size = 0;
465 vlc_mutex_unlock( &p_input->stream.stream_lock );
466 intf_ErrMsg( "input error: unknown file type for `%s'",
468 p_input->b_error = 1;
472 p_input->stream.pp_areas[0]->i_tell = 0;
473 vlc_mutex_unlock( &p_input->stream.stream_lock );
475 intf_Msg( "input: opening %s", p_input->p_source );
476 if( (p_input->i_handle = open( psz_name,
477 /*O_NONBLOCK | O_LARGEFILE*/0 )) == (-1) )
479 intf_ErrMsg( "input error: cannot open file (%s)", strerror(errno) );
480 p_input->b_error = 1;
486 /*****************************************************************************
487 * input_FileClose : close a file descriptor
488 *****************************************************************************/
489 void input_FileClose( input_thread_t * p_input )
491 close( p_input->i_handle );