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 1.65 2001/01/05 14:45:47 sam 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 );
66 /*****************************************************************************
67 * input_CreateThread: creates a new input thread
68 *****************************************************************************
69 * This function creates a new input, and returns a pointer
70 * to its description. On error, it returns NULL.
71 * If pi_status is NULL, then the function will block until the thread is ready.
72 * If not, it will be updated using one of the THREAD_* constants.
73 *****************************************************************************/
74 input_thread_t *input_CreateThread ( input_config_t * p_config, int *pi_status )
76 input_thread_t * p_input; /* thread descriptor */
77 int i_status; /* thread status */
79 /* Allocate descriptor */
80 p_input = (input_thread_t *)malloc( sizeof(input_thread_t) );
83 intf_ErrMsg( "input error: can't allocate input thread (%s)",
89 /* Initialize thread properties */
92 /* I have never understood that stuff --Meuuh */
93 p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
94 *p_input->pi_status = THREAD_CREATE;
95 p_input->p_config = p_config;
97 /* Initialize stream description */
98 p_input->stream.i_es_number = 0;
99 p_input->stream.i_selected_es_number = 0;
100 p_input->stream.i_pgrm_number = 0;
102 /* Initialize stream control properties. */
103 p_input->stream.control.i_status = PLAYING_S;
104 p_input->stream.control.i_rate = DEFAULT_RATE;
105 p_input->stream.control.i_ref_sysdate = 0;
106 p_input->stream.control.i_ref_clock = 0;
107 p_input->stream.control.b_mute = 0;
108 p_input->stream.control.b_bw = 0;
110 /* Create thread and set locks. */
111 vlc_mutex_init( &p_input->stream.stream_lock );
112 vlc_mutex_init( &p_input->stream.control.control_lock );
113 if( vlc_thread_create( &p_input->thread_id, "input", (void *) RunThread,
116 intf_ErrMsg( "input error: can't create input thread (%s)",
123 /* If status is NULL, wait until the thread is created */
124 if( pi_status == NULL )
128 msleep( THREAD_SLEEP );
129 } while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR)
130 && (i_status != THREAD_FATAL) );
131 if( i_status != THREAD_READY )
139 /*****************************************************************************
140 * input_DestroyThread: mark an input thread as zombie
141 *****************************************************************************
142 * This function should not return until the thread is effectively cancelled.
143 *****************************************************************************/
144 void input_DestroyThread( input_thread_t *p_input, int *pi_status )
146 int i_status; /* thread status */
149 p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
150 *p_input->pi_status = THREAD_DESTROY;
152 /* Request thread destruction */
155 /* If status is NULL, wait until thread has been destroyed */
156 if( pi_status == NULL )
160 msleep( THREAD_SLEEP );
161 } while ( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR)
162 && (i_status != THREAD_FATAL) );
166 /*****************************************************************************
167 * RunThread: main thread loop
168 *****************************************************************************
169 * Thread in charge of processing the network packets and demultiplexing.
170 *****************************************************************************/
171 static void RunThread( input_thread_t *p_input )
173 data_packet_t * pp_packets[INPUT_READ_ONCE];
176 InitThread( p_input );
178 while( !p_input->b_die && !p_input->b_error )
184 vlc_mutex_lock( &p_input->stream.control.control_lock );
185 if( p_input->stream.control.i_status == BACKWARD_S
186 && p_input->p_plugin->pf_rewind != NULL )
188 p_input->p_plugin->pf_rewind( p_input );
189 /* FIXME: probably don't do it every loop, but when ? */
191 vlc_mutex_unlock( &p_input->stream.control.control_lock );
193 i_error = p_input->p_plugin->pf_read( p_input, pp_packets );
195 /* Demultiplex read packets. */
196 for( i = 0; i < INPUT_READ_ONCE && pp_packets[i] != NULL; i++ )
198 p_input->p_plugin->pf_demux( p_input, pp_packets[i] );
206 intf_WarnMsg( 1, "End of file reached" );
207 /* FIXME: don't treat that as an error */
209 p_input->b_error = 1;
213 if( p_input->b_error )
215 ErrorThread( p_input );
218 EndThread( p_input );
219 intf_DbgMsg("Thread end");
222 /*****************************************************************************
223 * InitThread: init the input thread
224 *****************************************************************************/
225 input_capabilities_t * PSKludge( void );
226 static void InitThread( input_thread_t * p_input )
228 /* Initialize default settings for spawned decoders */
229 p_input->p_default_aout = p_input->p_config->p_default_aout;
230 p_input->p_default_vout = p_input->p_config->p_default_vout;
233 /* Initialize statistics */
234 p_input->c_loops = 0;
235 p_input->c_bytes = 0;
236 p_input->c_payload_bytes = 0;
237 p_input->c_packets_read = 0;
238 p_input->c_packets_trashed = 0;
241 /* Use the appropriate input method */
242 switch( p_input->p_config->i_method )
244 case INPUT_METHOD_FILE: /* file methods */
247 case INPUT_METHOD_VLAN_BCAST: /* vlan network method */
248 /* if( !p_main->b_vlans )
250 intf_ErrMsg("input error: vlans are not activated");
254 /* ... pass through */
255 case INPUT_METHOD_UCAST: /* network methods */
256 case INPUT_METHOD_MCAST:
257 case INPUT_METHOD_BCAST:
258 NetworkOpen( p_input );
262 intf_ErrMsg( "input error: unknow method 0x%.4x",
263 p_input->p_config->i_method );
264 free( p_input->p_config );
265 p_input->b_error = 1;
270 free( p_input->p_config );
272 /* Probe plugin (FIXME: load plugins before & write this) */
273 p_input->p_plugin = PSKludge();
274 p_input->p_plugin->pf_init( p_input );
276 *p_input->pi_status = THREAD_READY;
279 /*****************************************************************************
280 * ErrorThread: RunThread() error loop
281 *****************************************************************************
282 * This function is called when an error occured during thread main's loop.
283 *****************************************************************************/
284 static void ErrorThread( input_thread_t *p_input )
286 while( !p_input->b_die )
289 msleep( INPUT_IDLE_SLEEP );
293 /*****************************************************************************
294 * EndThread: end the input thread
295 *****************************************************************************/
296 static void EndThread( input_thread_t * p_input )
298 int * pi_status; /* thread status */
301 pi_status = p_input->pi_status;
302 *pi_status = THREAD_END;
306 struct tms cpu_usage;
309 intf_Msg("input stats: cpu usage (user: %d, system: %d)",
310 cpu_usage.tms_utime, cpu_usage.tms_stime);
314 /* Free all ES and destroy all decoder threads */
315 input_EndStream( p_input );
317 /* Free demultiplexer's data */
318 p_input->p_plugin->pf_end( p_input );
319 free( p_input->p_plugin );
321 /* Free input structure */
325 *pi_status = THREAD_OVER;
328 /*****************************************************************************
329 * NetworkOpen : open a network socket descriptor
330 *****************************************************************************/
331 static void NetworkOpen( input_thread_t * p_input )
333 /* straight copy & paste of input_network.c of input-I */
335 /* We cannot rewind nor lseek() */
336 p_input->stream.b_seekable = 0;
337 /* We cannot control the pace */
338 p_input->stream.b_pace_control = 0;
341 /*****************************************************************************
342 * FileOpen : open a file descriptor
343 *****************************************************************************/
344 static void FileOpen( input_thread_t * p_input )
346 struct stat stat_info;
348 #define p_config p_input->p_config
350 if( stat( p_config->p_source, &stat_info ) == (-1) )
352 intf_ErrMsg( "input error: cannot stat() file %s (%s)",
353 p_config->p_source, strerror(errno));
354 p_input->b_error = 1;
358 vlc_mutex_lock( &p_input->stream.stream_lock );
360 /* If we are here we can control the pace... */
361 p_input->stream.b_pace_control = 1;
363 if( S_ISREG(stat_info.st_mode) || S_ISCHR(stat_info.st_mode)
364 || S_ISBLK(stat_info.st_mode) )
366 p_input->stream.b_seekable = 1;
367 p_input->stream.i_size = stat_info.st_size;
369 else if( S_ISFIFO(stat_info.st_mode) || S_ISSOCK(stat_info.st_mode) )
371 p_input->stream.b_seekable = 0;
372 p_input->stream.i_size = 0;
376 vlc_mutex_unlock( &p_input->stream.stream_lock );
377 intf_ErrMsg( "input error: unknown file type for %s",
378 p_config->p_source );
379 p_input->b_error = 1;
383 p_input->stream.i_tell = 0;
384 vlc_mutex_unlock( &p_input->stream.stream_lock );
386 intf_Msg( "Opening file %s", p_config->p_source );
387 if( (p_input->i_handle = open( p_config->p_source,
388 /*O_NONBLOCK | O_LARGEFILE*/0 )) == (-1) )
390 intf_ErrMsg( "input error: cannot open file %s", strerror(errno) );
391 p_input->b_error = 1;