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 1.78 2001/02/08 13:52:35 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 void InitThread ( input_thread_t *p_input );
66 static void ErrorThread ( input_thread_t *p_input );
67 static void EndThread ( input_thread_t *p_input );
69 /*****************************************************************************
70 * input_CreateThread: creates a new input thread
71 *****************************************************************************
72 * This function creates a new input, and returns a pointer
73 * to its description. On error, it returns NULL.
74 * If pi_status is NULL, then the function will block until the thread is ready.
75 * If not, it will be updated using one of the THREAD_* constants.
76 *****************************************************************************/
77 input_thread_t *input_CreateThread ( playlist_item_t *p_item, int *pi_status )
79 input_thread_t * p_input; /* thread descriptor */
80 int i_status; /* thread status */
82 /* Allocate descriptor */
83 p_input = (input_thread_t *)malloc( sizeof(input_thread_t) );
86 intf_ErrMsg( "input error: can't allocate input thread (%s)",
91 /* Initialize thread properties */
97 p_input->p_source = p_item->psz_name;
99 /* I have never understood that stuff --Meuuh */
100 p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
101 *p_input->pi_status = THREAD_CREATE;
103 /* Initialize stream description */
104 p_input->stream.i_es_number = 0;
105 p_input->stream.i_selected_es_number = 0;
106 p_input->stream.i_pgrm_number = 0;
107 p_input->stream.i_new_status = p_input->stream.i_new_rate = 0;
108 p_input->stream.i_seek = 0;
110 /* Initialize stream control properties. */
111 p_input->stream.control.i_status = PLAYING_S;
112 p_input->stream.control.i_rate = DEFAULT_RATE;
113 p_input->stream.control.b_mute = 0;
114 p_input->stream.control.b_bw = 0;
116 /* Initialize default settings for spawned decoders */
117 p_input->p_default_aout = p_main->p_aout;
118 p_input->p_default_vout = p_main->p_intf->p_vout;
120 /* Create thread and set locks. */
121 vlc_mutex_init( &p_input->stream.stream_lock );
122 vlc_cond_init( &p_input->stream.stream_wait );
123 vlc_mutex_init( &p_input->stream.control.control_lock );
124 if( vlc_thread_create( &p_input->thread_id, "input", (void *) RunThread,
127 intf_ErrMsg( "input error: can't create input thread (%s)",
133 /* If status is NULL, wait until the thread is created */
134 if( pi_status == NULL )
138 msleep( THREAD_SLEEP );
139 } while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR)
140 && (i_status != THREAD_FATAL) );
141 if( i_status != THREAD_READY )
149 /*****************************************************************************
150 * input_DestroyThread: mark an input thread as zombie
151 *****************************************************************************
152 * This function should not return until the thread is effectively cancelled.
153 *****************************************************************************/
154 void input_DestroyThread( input_thread_t *p_input, int *pi_status )
156 int i_status; /* thread status */
159 p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
160 *p_input->pi_status = THREAD_DESTROY;
162 /* Request thread destruction */
165 /* Make the thread exit of an eventual vlc_cond_wait() */
166 vlc_mutex_lock( &p_input->stream.stream_lock );
167 vlc_cond_signal( &p_input->stream.stream_wait );
168 vlc_mutex_unlock( &p_input->stream.stream_lock );
170 /* If status is NULL, wait until thread has been destroyed */
171 if( pi_status == NULL )
175 msleep( THREAD_SLEEP );
176 } while ( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR)
177 && (i_status != THREAD_FATAL) );
181 /*****************************************************************************
182 * RunThread: main thread loop
183 *****************************************************************************
184 * Thread in charge of processing the network packets and demultiplexing.
185 *****************************************************************************/
186 static void RunThread( input_thread_t *p_input )
188 data_packet_t * pp_packets[INPUT_READ_ONCE];
191 InitThread( p_input );
193 while( !p_input->b_die && !p_input->b_error && !p_input->b_eof )
200 vlc_mutex_lock( &p_input->stream.stream_lock );
201 if( p_input->stream.i_seek )
203 if( p_input->stream.b_seekable && p_input->pf_seek != NULL )
205 p_input->pf_seek( p_input, p_input->stream.i_seek );
207 for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
209 pgrm_descriptor_t * p_pgrm
210 = p_input->stream.pp_programs[i];
211 /* Escape all decoders for the stream discontinuity they
213 input_EscapeDiscontinuity( p_input, p_pgrm );
215 /* Reinitialize synchro. */
216 p_pgrm->i_synchro_state = SYNCHRO_REINIT;
219 p_input->stream.i_seek = 0;
221 vlc_mutex_unlock( &p_input->stream.stream_lock );
223 i_error = p_input->pf_read( p_input, pp_packets );
225 /* Demultiplex read packets. */
226 for( i = 0; i < INPUT_READ_ONCE && pp_packets[i] != NULL; i++ )
228 p_input->pf_demux( p_input, pp_packets[i] );
235 /* End of file - we do not set b_die because only the
236 * interface is allowed to do so. */
237 intf_WarnMsg( 1, "End of file reached" );
242 p_input->b_error = 1;
247 if( p_input->b_error || p_input->b_eof )
249 ErrorThread( p_input );
252 EndThread( p_input );
253 intf_DbgMsg("Thread end");
256 /*****************************************************************************
257 * InitThread: init the input Thread
258 *****************************************************************************/
259 static void InitThread( input_thread_t * p_input )
263 /* Initialize statistics */
264 p_input->c_loops = 0;
265 p_input->c_bytes = 0;
266 p_input->c_payload_bytes = 0;
267 p_input->c_packets_read = 0;
268 p_input->c_packets_trashed = 0;
271 p_input->p_input_module = module_Need( p_main->p_module_bank,
272 MODULE_CAPABILITY_INPUT, NULL );
274 if( p_input->p_input_module == NULL )
276 intf_ErrMsg( "input error: no suitable input module" );
277 p_input->b_error = 1;
281 #define f p_input->p_input_module->p_functions->input.functions.input
282 p_input->pf_init = f.pf_init;
283 p_input->pf_open = f.pf_open;
284 p_input->pf_close = f.pf_close;
285 p_input->pf_end = f.pf_end;
286 p_input->pf_read = f.pf_read;
287 p_input->pf_demux = f.pf_demux;
288 p_input->pf_new_packet = f.pf_new_packet;
289 p_input->pf_new_pes = f.pf_new_pes;
290 p_input->pf_delete_packet = f.pf_delete_packet;
291 p_input->pf_delete_pes = f.pf_delete_pes;
292 p_input->pf_rewind = f.pf_rewind;
293 p_input->pf_seek = f.pf_seek;
296 p_input->pf_open( p_input );
298 if( p_input->b_error )
300 module_Unneed( p_main->p_module_bank, p_input->p_input_module );
304 p_input->pf_init( p_input );
307 *p_input->pi_status = THREAD_READY;
310 /*****************************************************************************
311 * ErrorThread: RunThread() error loop
312 *****************************************************************************
313 * This function is called when an error occured during thread main's loop.
314 *****************************************************************************/
315 static void ErrorThread( input_thread_t *p_input )
317 while( !p_input->b_die )
320 msleep( INPUT_IDLE_SLEEP );
324 /*****************************************************************************
325 * EndThread: end the input thread
326 *****************************************************************************/
327 static void EndThread( input_thread_t * p_input )
329 int * pi_status; /* thread status */
332 pi_status = p_input->pi_status;
333 *pi_status = THREAD_END;
337 struct tms cpu_usage;
340 intf_Msg("input stats: cpu usage (user: %d, system: %d)",
341 cpu_usage.tms_utime, cpu_usage.tms_stime);
345 /* Free all ES and destroy all decoder threads */
346 input_EndStream( p_input );
349 p_input->pf_close( p_input );
351 /* Free demultiplexer's data */
352 p_input->pf_end( p_input );
354 /* Release modules */
355 module_Unneed( p_main->p_module_bank, p_input->p_input_module );
357 /* Destroy Mutex locks */
358 vlc_mutex_destroy( &p_input->stream.control.control_lock );
359 vlc_mutex_destroy( &p_input->stream.stream_lock );
361 /* Free input structure */
365 *pi_status = THREAD_OVER;
368 /*****************************************************************************
369 * input_FileOpen : open a file descriptor
370 *****************************************************************************/
371 void input_FileOpen( input_thread_t * p_input )
373 struct stat stat_info;
375 if( stat( p_input->p_source, &stat_info ) == (-1) )
377 intf_ErrMsg( "input error: cannot stat() file `%s' (%s)",
378 p_input->p_source, strerror(errno));
379 p_input->b_error = 1;
383 vlc_mutex_lock( &p_input->stream.stream_lock );
385 /* If we are here we can control the pace... */
386 p_input->stream.b_pace_control = 1;
388 if( S_ISREG(stat_info.st_mode) || S_ISCHR(stat_info.st_mode)
389 || S_ISBLK(stat_info.st_mode) )
391 p_input->stream.b_seekable = 1;
392 p_input->stream.i_size = stat_info.st_size;
394 else if( S_ISFIFO(stat_info.st_mode) || S_ISSOCK(stat_info.st_mode) )
396 p_input->stream.b_seekable = 0;
397 p_input->stream.i_size = 0;
401 vlc_mutex_unlock( &p_input->stream.stream_lock );
402 intf_ErrMsg( "input error: unknown file type for `%s'",
404 p_input->b_error = 1;
408 p_input->stream.i_tell = 0;
409 vlc_mutex_unlock( &p_input->stream.stream_lock );
411 intf_Msg( "input: opening file %s", p_input->p_source );
412 if( (p_input->i_handle = open( p_input->p_source,
413 /*O_NONBLOCK | O_LARGEFILE*/0 )) == (-1) )
415 intf_ErrMsg( "input error: cannot open file (%s)", strerror(errno) );
416 p_input->b_error = 1;
422 /*****************************************************************************
423 * input_FileClose : close a file descriptor
424 *****************************************************************************/
425 void input_FileClose( input_thread_t * p_input )
427 close( p_input->i_handle );