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 1.83 2001/02/18 03:32:02 polux 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;
111 /* Initialize stream control properties. */
112 p_input->stream.control.i_status = PLAYING_S;
113 p_input->stream.control.i_rate = DEFAULT_RATE;
114 p_input->stream.control.b_mute = 0;
115 p_input->stream.control.b_bw = 0;
117 /* Initialize default settings for spawned decoders */
118 p_input->p_default_aout = p_main->p_aout;
119 p_input->p_default_vout = p_main->p_vout;
121 /* Create thread and set locks. */
122 vlc_mutex_init( &p_input->stream.stream_lock );
123 vlc_cond_init( &p_input->stream.stream_wait );
124 vlc_mutex_init( &p_input->stream.control.control_lock );
125 if( vlc_thread_create( &p_input->thread_id, "input", (void *) RunThread,
128 intf_ErrMsg( "input error: can't create input thread (%s)",
134 /* If status is NULL, wait until the thread is created */
135 if( pi_status == NULL )
139 msleep( THREAD_SLEEP );
140 } while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR)
141 && (i_status != THREAD_FATAL) );
142 if( i_status != THREAD_READY )
150 /*****************************************************************************
151 * input_DestroyThread: mark an input thread as zombie
152 *****************************************************************************
153 * This function should not return until the thread is effectively cancelled.
154 *****************************************************************************/
155 void input_DestroyThread( input_thread_t *p_input, int *pi_status )
157 int i_status; /* thread status */
160 p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
161 *p_input->pi_status = THREAD_DESTROY;
163 /* Request thread destruction */
166 /* Make the thread exit of an eventual vlc_cond_wait() */
167 vlc_mutex_lock( &p_input->stream.stream_lock );
168 vlc_cond_signal( &p_input->stream.stream_wait );
169 vlc_mutex_unlock( &p_input->stream.stream_lock );
171 /* If status is NULL, wait until thread has been destroyed */
172 if( pi_status == NULL )
176 msleep( THREAD_SLEEP );
177 } while ( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR)
178 && (i_status != THREAD_FATAL) );
182 /*****************************************************************************
183 * RunThread: main thread loop
184 *****************************************************************************
185 * Thread in charge of processing the network packets and demultiplexing.
186 *****************************************************************************/
187 static void RunThread( input_thread_t *p_input )
189 data_packet_t * pp_packets[INPUT_READ_ONCE];
192 if( InitThread( p_input ) )
195 /* If we failed, wait before we are killed, and exit */
196 *p_input->pi_status = THREAD_ERROR;
197 p_input->b_error = 1;
198 ErrorThread( p_input );
199 DestroyThread( p_input );
203 while( !p_input->b_die && !p_input->b_error && !p_input->b_eof )
210 vlc_mutex_lock( &p_input->stream.stream_lock );
211 if( p_input->stream.i_seek != NO_SEEK )
213 if( p_input->stream.b_seekable && p_input->pf_seek != NULL )
215 p_input->pf_seek( p_input, p_input->stream.i_seek );
217 for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
219 pgrm_descriptor_t * p_pgrm
220 = p_input->stream.pp_programs[i];
221 /* Escape all decoders for the stream discontinuity they
223 input_EscapeDiscontinuity( p_input, p_pgrm );
225 /* Reinitialize synchro. */
226 p_pgrm->i_synchro_state = SYNCHRO_REINIT;
229 p_input->stream.i_seek = NO_SEEK;
231 vlc_mutex_unlock( &p_input->stream.stream_lock );
233 i_error = p_input->pf_read( p_input, pp_packets );
235 /* Demultiplex read packets. */
236 for( i = 0; i < INPUT_READ_ONCE && pp_packets[i] != NULL; i++ )
238 p_input->pf_demux( p_input, pp_packets[i] );
245 /* End of file - we do not set b_die because only the
246 * interface is allowed to do so. */
247 intf_WarnMsg( 1, "End of file reached" );
252 p_input->b_error = 1;
257 if( p_input->b_error || p_input->b_eof )
259 ErrorThread( p_input );
262 EndThread( p_input );
264 DestroyThread( p_input );
266 intf_DbgMsg("Thread end");
269 /*****************************************************************************
270 * InitThread: init the input Thread
271 *****************************************************************************/
272 static int InitThread( input_thread_t * p_input )
276 /* Initialize statistics */
277 p_input->c_loops = 0;
278 p_input->c_bytes = 0;
279 p_input->c_payload_bytes = 0;
280 p_input->c_packets_read = 0;
281 p_input->c_packets_trashed = 0;
284 p_input->p_input_module = module_Need( p_main->p_bank,
285 MODULE_CAPABILITY_INPUT,
286 (probedata_t *)p_input );
288 if( p_input->p_input_module == NULL )
290 intf_ErrMsg( "input error: no suitable input module" );
291 module_Unneed( p_main->p_bank, p_input->p_input_module );
295 #define f p_input->p_input_module->p_functions->input.functions.input
296 p_input->pf_init = f.pf_init;
297 p_input->pf_open = f.pf_open;
298 p_input->pf_close = f.pf_close;
299 p_input->pf_end = f.pf_end;
300 p_input->pf_read = f.pf_read;
301 p_input->pf_demux = f.pf_demux;
302 p_input->pf_new_packet = f.pf_new_packet;
303 p_input->pf_new_pes = f.pf_new_pes;
304 p_input->pf_delete_packet = f.pf_delete_packet;
305 p_input->pf_delete_pes = f.pf_delete_pes;
306 p_input->pf_rewind = f.pf_rewind;
307 p_input->pf_seek = f.pf_seek;
310 p_input->pf_open( p_input );
312 if( p_input->b_error )
314 /* We barfed -- exit nicely */
315 p_input->pf_close( p_input );
316 module_Unneed( p_main->p_bank, p_input->p_input_module );
320 p_input->pf_init( p_input );
322 *p_input->pi_status = THREAD_READY;
327 /*****************************************************************************
328 * ErrorThread: RunThread() error loop
329 *****************************************************************************
330 * This function is called when an error occured during thread main's loop.
331 *****************************************************************************/
332 static void ErrorThread( input_thread_t *p_input )
334 while( !p_input->b_die )
337 msleep( INPUT_IDLE_SLEEP );
341 /*****************************************************************************
342 * EndThread: end the input thread
343 *****************************************************************************/
344 static void EndThread( input_thread_t * p_input )
346 int * pi_status; /* thread status */
349 pi_status = p_input->pi_status;
350 *pi_status = THREAD_END;
354 struct tms cpu_usage;
357 intf_Msg("input stats: cpu usage (user: %d, system: %d)",
358 cpu_usage.tms_utime, cpu_usage.tms_stime);
362 /* Free all ES and destroy all decoder threads */
363 input_EndStream( p_input );
365 /* Free demultiplexer's data */
366 p_input->pf_end( p_input );
369 p_input->pf_close( p_input );
371 /* Release modules */
372 module_Unneed( p_main->p_bank, p_input->p_input_module );
376 /*****************************************************************************
377 * DestroyThread: destroy the input thread
378 *****************************************************************************/
379 static void DestroyThread( input_thread_t * p_input )
381 int * pi_status; /* thread status */
384 pi_status = p_input->pi_status;
386 /* Destroy Mutex locks */
387 vlc_mutex_destroy( &p_input->stream.control.control_lock );
388 vlc_mutex_destroy( &p_input->stream.stream_lock );
390 /* Free input structure */
394 *pi_status = THREAD_OVER;
397 /*****************************************************************************
398 * input_FileOpen : open a file descriptor
399 *****************************************************************************/
400 void input_FileOpen( input_thread_t * p_input )
402 struct stat stat_info;
405 char *psz_name = p_input->p_source;
407 /* FIXME: this code ought to be in the plugin so that code can
408 * be shared with the *_Probe function */
409 if( ( i_stat = stat( psz_name, &stat_info ) ) == (-1) )
411 int i_size = strlen( psz_name );
414 && !strncasecmp( psz_name, "dvd:", 4 ) )
416 /* get rid of the 'dvd:' stuff and try again */
418 i_stat = stat( psz_name, &stat_info );
420 else if( ( i_size > 5 )
421 && !strncasecmp( psz_name, "file:", 5 ) )
423 /* get rid of the 'file:' stuff and try again */
425 i_stat = stat( psz_name, &stat_info );
430 intf_ErrMsg( "input error: cannot stat() file `%s' (%s)",
431 psz_name, strerror(errno));
432 p_input->b_error = 1;
437 vlc_mutex_lock( &p_input->stream.stream_lock );
439 /* If we are here we can control the pace... */
440 p_input->stream.b_pace_control = 1;
442 if( S_ISREG(stat_info.st_mode) || S_ISCHR(stat_info.st_mode)
443 || S_ISBLK(stat_info.st_mode) )
445 p_input->stream.b_seekable = 1;
446 p_input->stream.i_size = stat_info.st_size;
448 else if( S_ISFIFO(stat_info.st_mode)
450 || S_ISSOCK(stat_info.st_mode)
454 p_input->stream.b_seekable = 0;
455 p_input->stream.i_size = 0;
459 vlc_mutex_unlock( &p_input->stream.stream_lock );
460 intf_ErrMsg( "input error: unknown file type for `%s'",
462 p_input->b_error = 1;
466 p_input->stream.i_tell = 0;
467 vlc_mutex_unlock( &p_input->stream.stream_lock );
469 intf_Msg( "input: opening %s", p_input->p_source );
470 if( (p_input->i_handle = open( psz_name,
471 /*O_NONBLOCK | O_LARGEFILE*/0 )) == (-1) )
473 intf_ErrMsg( "input error: cannot open file (%s)", strerror(errno) );
474 p_input->b_error = 1;
480 /*****************************************************************************
481 * input_FileClose : close a file descriptor
482 *****************************************************************************/
483 void input_FileClose( input_thread_t * p_input )
485 close( p_input->i_handle );