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 1.74 2001/02/07 17:44:52 massiot Exp $
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 "stream_control.h"
51 #include "input_ext-intf.h"
52 #include "input_ext-dec.h"
56 /*****************************************************************************
58 *****************************************************************************/
59 static void RunThread ( input_thread_t *p_input );
60 static void InitThread ( input_thread_t *p_input );
61 static void ErrorThread ( input_thread_t *p_input );
62 static void EndThread ( input_thread_t *p_input );
63 static void NetworkOpen ( input_thread_t *p_input );
64 static void FileOpen ( input_thread_t *p_input );
65 static void DvdOpen ( input_thread_t *p_input );
67 /*****************************************************************************
68 * input_CreateThread: creates a new input thread
69 *****************************************************************************
70 * This function creates a new input, and returns a pointer
71 * to its description. On error, it returns NULL.
72 * If pi_status is NULL, then the function will block until the thread is ready.
73 * If not, it will be updated using one of the THREAD_* constants.
74 *****************************************************************************/
75 input_thread_t *input_CreateThread ( input_config_t * p_config, int *pi_status )
77 input_thread_t * p_input; /* thread descriptor */
78 int i_status; /* thread status */
80 /* Allocate descriptor */
81 p_input = (input_thread_t *)malloc( sizeof(input_thread_t) );
84 intf_ErrMsg( "input error: can't allocate input thread (%s)",
90 /* Initialize thread properties */
93 /* I have never understood that stuff --Meuuh */
94 p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
95 *p_input->pi_status = THREAD_CREATE;
96 p_input->p_config = p_config;
98 /* Initialize stream description */
99 p_input->stream.i_es_number = 0;
100 p_input->stream.i_selected_es_number = 0;
101 p_input->stream.i_pgrm_number = 0;
102 p_input->stream.i_new_status = p_input->stream.i_new_rate = 0;
103 p_input->stream.i_seek = 0;
105 /* Initialize stream control properties. */
106 p_input->stream.control.i_status = PLAYING_S;
107 p_input->stream.control.i_rate = DEFAULT_RATE;
108 p_input->stream.control.b_mute = 0;
109 p_input->stream.control.b_bw = 0;
111 /* Create thread and set locks. */
112 vlc_mutex_init( &p_input->stream.stream_lock );
113 vlc_mutex_init( &p_input->stream.control.control_lock );
114 if( vlc_thread_create( &p_input->thread_id, "input", (void *) RunThread,
117 intf_ErrMsg( "input error: can't create input thread (%s)",
124 /* If status is NULL, wait until the thread is created */
125 if( pi_status == NULL )
129 msleep( THREAD_SLEEP );
130 } while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR)
131 && (i_status != THREAD_FATAL) );
132 if( i_status != THREAD_READY )
140 /*****************************************************************************
141 * input_DestroyThread: mark an input thread as zombie
142 *****************************************************************************
143 * This function should not return until the thread is effectively cancelled.
144 *****************************************************************************/
145 void input_DestroyThread( input_thread_t *p_input, int *pi_status )
147 int i_status; /* thread status */
150 p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
151 *p_input->pi_status = THREAD_DESTROY;
153 /* Request thread destruction */
156 /* If status is NULL, wait until thread has been destroyed */
157 if( pi_status == NULL )
161 msleep( THREAD_SLEEP );
162 } while ( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR)
163 && (i_status != THREAD_FATAL) );
167 /*****************************************************************************
168 * RunThread: main thread loop
169 *****************************************************************************
170 * Thread in charge of processing the network packets and demultiplexing.
171 *****************************************************************************/
172 static void RunThread( input_thread_t *p_input )
174 data_packet_t * pp_packets[INPUT_READ_ONCE];
177 InitThread( p_input );
179 while( !p_input->b_die && !p_input->b_error )
185 vlc_mutex_lock( &p_input->stream.control.control_lock );
186 if( p_input->stream.control.i_status == BACKWARD_S
187 && p_input->p_plugin->pf_rewind != NULL )
189 p_input->p_plugin->pf_rewind( p_input );
190 /* FIXME: probably don't do it every loop, but when ? */
192 vlc_mutex_unlock( &p_input->stream.control.control_lock );
194 i_error = p_input->p_plugin->pf_read( p_input, pp_packets );
196 /* Demultiplex read packets. */
197 for( i = 0; i < INPUT_READ_ONCE && pp_packets[i] != NULL; i++ )
199 p_input->p_plugin->pf_demux( p_input, pp_packets[i] );
207 intf_WarnMsg( 1, "End of file reached" );
208 /* FIXME: don't treat that as an error */
210 p_input->b_error = 1;
214 if( p_input->b_error )
216 ErrorThread( p_input );
219 EndThread( p_input );
220 intf_DbgMsg("Thread end");
223 /*****************************************************************************
224 * InitThread: init the input thread
225 *****************************************************************************/
226 input_capabilities_t * PSKludge( void );
227 input_capabilities_t * DVDKludge( void );
228 static void InitThread( input_thread_t * p_input )
230 /* Initialize default settings for spawned decoders */
231 p_input->p_default_aout = p_input->p_config->p_default_aout;
232 p_input->p_default_vout = p_input->p_config->p_default_vout;
235 /* Initialize statistics */
236 p_input->c_loops = 0;
237 p_input->c_bytes = 0;
238 p_input->c_payload_bytes = 0;
239 p_input->c_packets_read = 0;
240 p_input->c_packets_trashed = 0;
243 /* Use the appropriate input method */
244 switch( p_input->p_config->i_method )
246 case INPUT_METHOD_FILE: /* file methods */
248 /* Probe plugin (FIXME: load plugins before & write this) */
249 p_input->p_plugin = PSKludge();
251 case INPUT_METHOD_DVD: /* DVD method */
254 p_input->p_plugin = DVDKludge();
256 case INPUT_METHOD_VLAN_BCAST: /* vlan network method */
257 /* if( !p_main->b_vlans )
259 intf_ErrMsg("input error: vlans are not activated");
263 /* ... pass through */
264 case INPUT_METHOD_UCAST: /* network methods */
265 case INPUT_METHOD_MCAST:
266 case INPUT_METHOD_BCAST:
267 NetworkOpen( p_input );
271 intf_ErrMsg( "input error: unknow method 0x%.4x",
272 p_input->p_config->i_method );
273 free( p_input->p_config );
274 p_input->b_error = 1;
279 free( p_input->p_config );
281 if( !p_input->b_error )
283 p_input->p_plugin->pf_init( p_input );
286 *p_input->pi_status = THREAD_READY;
289 /*****************************************************************************
290 * ErrorThread: RunThread() error loop
291 *****************************************************************************
292 * This function is called when an error occured during thread main's loop.
293 *****************************************************************************/
294 static void ErrorThread( input_thread_t *p_input )
296 while( !p_input->b_die )
299 msleep( INPUT_IDLE_SLEEP );
303 /*****************************************************************************
304 * EndThread: end the input thread
305 *****************************************************************************/
306 static void EndThread( input_thread_t * p_input )
308 int * pi_status; /* thread status */
311 pi_status = p_input->pi_status;
312 *pi_status = THREAD_END;
316 struct tms cpu_usage;
319 intf_Msg("input stats: cpu usage (user: %d, system: %d)",
320 cpu_usage.tms_utime, cpu_usage.tms_stime);
324 /* Free all ES and destroy all decoder threads */
325 input_EndStream( p_input );
327 /* Free demultiplexer's data */
328 p_input->p_plugin->pf_end( p_input );
329 free( p_input->p_plugin );
331 /* Destroy Mutex locks */
332 vlc_mutex_destroy( &p_input->stream.control.control_lock );
333 vlc_mutex_destroy( &p_input->stream.stream_lock );
335 /* Free input structure */
339 *pi_status = THREAD_OVER;
342 /*****************************************************************************
343 * NetworkOpen : open a network socket descriptor
344 *****************************************************************************/
345 static void NetworkOpen( input_thread_t * p_input )
347 /* straight copy & paste of input_network.c of input-I */
349 /* We cannot rewind nor lseek() */
350 p_input->stream.b_seekable = 0;
351 /* We cannot control the pace */
352 p_input->stream.b_pace_control = 0;
355 /*****************************************************************************
356 * FileOpen : open a file descriptor
357 *****************************************************************************/
358 static void FileOpen( input_thread_t * p_input )
360 struct stat stat_info;
362 #define p_config p_input->p_config
364 if( stat( p_config->p_source, &stat_info ) == (-1) )
366 intf_ErrMsg( "input error: cannot stat() file `%s' (%s)",
367 p_config->p_source, strerror(errno));
368 p_input->b_error = 1;
372 vlc_mutex_lock( &p_input->stream.stream_lock );
374 /* If we are here we can control the pace... */
375 p_input->stream.b_pace_control = 1;
377 if( S_ISREG(stat_info.st_mode) || S_ISCHR(stat_info.st_mode)
378 || S_ISBLK(stat_info.st_mode) )
380 p_input->stream.b_seekable = 1;
381 p_input->stream.i_size = stat_info.st_size;
383 else if( S_ISFIFO(stat_info.st_mode) || S_ISSOCK(stat_info.st_mode) )
385 p_input->stream.b_seekable = 0;
386 p_input->stream.i_size = 0;
390 vlc_mutex_unlock( &p_input->stream.stream_lock );
391 intf_ErrMsg( "input error: unknown file type for `%s'",
392 p_config->p_source );
393 p_input->b_error = 1;
397 p_input->stream.i_tell = 0;
398 vlc_mutex_unlock( &p_input->stream.stream_lock );
400 intf_Msg( "input: opening file %s", p_config->p_source );
401 if( (p_input->i_handle = open( p_config->p_source,
402 /*O_NONBLOCK | O_LARGEFILE*/0 )) == (-1) )
404 intf_ErrMsg( "input error: cannot open file (%s)", strerror(errno) );
405 p_input->b_error = 1;
412 /*****************************************************************************
413 * DvdOpen : open the dvd device
414 *****************************************************************************/
415 static void DvdOpen( input_thread_t * p_input )
417 intf_Msg( "input: opening DVD %s", p_input->p_config->p_source );
418 if( (p_input->i_handle = open( p_input->p_config->p_source,
419 O_RDONLY| O_NONBLOCK |O_LARGEFILE )) == (-1) )
421 intf_ErrMsg( "input error: cannot open device (%s)", strerror(errno) );
422 p_input->b_error = 1;
426 vlc_mutex_lock( &p_input->stream.stream_lock );
428 p_input->stream.b_pace_control = 1;
429 p_input->stream.b_seekable = 1;
430 p_input->stream.i_size = 0;
431 p_input->stream.i_tell = 0;
433 vlc_mutex_unlock( &p_input->stream.stream_lock );