1 /*****************************************************************************
2 * video_parser.c : video parser thread
3 *****************************************************************************
4 * Copyright (C) 1999, 2000 VideoLAN
6 * Authors: Christophe Massiot <massiot@via.ecp.fr>
7 * Samuel Hocevar <sam@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /* FIXME: passer en terminate/destroy avec les signaux supplémentaires ?? */
26 /*****************************************************************************
28 *****************************************************************************/
31 #include <stdlib.h> /* malloc(), free() */
32 #include <unistd.h> /* getpid() */
33 #include <sys/types.h> /* on BSD, uio.h needs types.h */
34 #include <sys/uio.h> /* "input.h" */
43 #include "debug.h" /* XXX?? temporaire, requis par netlist.h */
46 #include "input_netlist.h"
47 #include "decoder_fifo.h"
49 #include "video_output.h"
51 #include "vdec_idct.h"
52 #include "video_decoder.h"
53 #include "vdec_motion.h"
55 #include "vpar_blocks.h"
56 #include "vpar_headers.h"
57 #include "vpar_synchro.h"
58 #include "video_parser.h"
59 #include "video_fifo.h"
64 //static int CheckConfiguration ( video_cfg_t *p_cfg );
65 static int InitThread ( vpar_thread_t *p_vpar );
66 static void RunThread ( vpar_thread_t *p_vpar );
67 static void ErrorThread ( vpar_thread_t *p_vpar );
68 static void EndThread ( vpar_thread_t *p_vpar );
69 static int SynchroType ( );
71 /*****************************************************************************
72 * vpar_CreateThread: create a generic parser thread
73 *****************************************************************************
74 * This function creates a new video parser thread, and returns a pointer
75 * to its description. On error, it returns NULL.
76 * Following configuration properties are used:
78 *****************************************************************************/
80 #include "interface.h"
81 extern main_t* p_main;
82 vpar_thread_t * vpar_CreateThread( /* video_cfg_t *p_cfg, */ input_thread_t *p_input /*,
83 vout_thread_t *p_vout, int *pi_status */ )
85 vpar_thread_t * p_vpar;
87 intf_DbgMsg( "vpar debug: creating video parser thread\n" );
89 /* Allocate the memory needed to store the thread's structure */
90 if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
92 intf_ErrMsg( "vpar error: not enough memory "
93 "for vpar_CreateThread() to create the new thread\n");
98 * Initialize the thread properties
104 * Initialize the input properties
106 /* Initialize the decoder fifo's data lock and conditional variable
107 * and set its buffer as empty */
108 vlc_mutex_init( &p_vpar->fifo.data_lock );
109 vlc_cond_init( &p_vpar->fifo.data_wait );
110 p_vpar->fifo.i_start = 0;
111 p_vpar->fifo.i_end = 0;
112 /* Initialize the bit stream structure */
113 p_vpar->bit_stream.p_input = p_input;
114 p_vpar->bit_stream.p_decoder_fifo = &p_vpar->fifo;
115 p_vpar->bit_stream.fifo.buffer = 0;
116 p_vpar->bit_stream.fifo.i_available = 0;
119 p_vpar->p_vout = p_main->p_intf->p_vout;
121 /* Spawn the video parser thread */
122 if ( vlc_thread_create( &p_vpar->thread_id, "video parser",
123 (vlc_thread_func_t)RunThread, (void *)p_vpar ) )
125 intf_ErrMsg("vpar error: can't spawn video parser thread\n");
130 intf_DbgMsg("vpar debug: video parser thread (%p) created\n", p_vpar);
134 /*****************************************************************************
135 * vpar_DestroyThread: destroy a generic parser thread
136 *****************************************************************************
137 * Destroy a terminated thread. This function will return 0 if the thread could
138 * be destroyed, and non 0 else. The last case probably means that the thread
139 * was still active, and another try may succeed.
140 *****************************************************************************/
141 void vpar_DestroyThread( vpar_thread_t *p_vpar /*, int *pi_status */ )
143 intf_DbgMsg( "vpar debug: requesting termination of "
144 "video parser thread %p\n", p_vpar);
146 /* Ask thread to kill itself */
148 /* Make sure the parser thread leaves the GetByte() function */
149 vlc_mutex_lock( &(p_vpar->fifo.data_lock) );
150 vlc_cond_signal( &(p_vpar->fifo.data_wait) );
151 vlc_mutex_unlock( &(p_vpar->fifo.data_lock) );
153 /* Waiting for the parser thread to exit */
154 /* Remove this as soon as the "status" flag is implemented */
155 vlc_thread_join( p_vpar->thread_id );
158 /* following functions are local */
160 /*****************************************************************************
161 * CheckConfiguration: check vpar_CreateThread() configuration
162 *****************************************************************************
163 * Set default parameters where required. In DEBUG mode, check if configuration
165 *****************************************************************************/
167 static int CheckConfiguration( video_cfg_t *p_cfg )
175 /*****************************************************************************
176 * InitThread: initialize vpar output thread
177 *****************************************************************************
178 * This function is called from RunThread and performs the second step of the
179 * initialization. It returns 0 on success. Note that the thread's flag are not
180 * modified inside this function.
181 *****************************************************************************/
182 static int InitThread( vpar_thread_t *p_vpar )
188 intf_DbgMsg("vpar debug: initializing video parser thread %p\n", p_vpar);
190 /* Our first job is to initialize the bit stream structure with the
191 * beginning of the input stream */
192 vlc_mutex_lock( &p_vpar->fifo.data_lock );
193 while ( DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
197 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
200 vlc_cond_wait( &p_vpar->fifo.data_wait, &p_vpar->fifo.data_lock );
202 p_vpar->bit_stream.p_ts = DECODER_FIFO_START( p_vpar->fifo )->p_first_ts;
203 p_vpar->bit_stream.p_byte = p_vpar->bit_stream.p_ts->buffer
204 + p_vpar->bit_stream.p_ts->i_payload_start;
205 p_vpar->bit_stream.p_end = p_vpar->bit_stream.p_ts->buffer
206 + p_vpar->bit_stream.p_ts->i_payload_end;
207 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
209 /* Initialize parsing data */
210 p_vpar->sequence.p_forward = NULL;
211 p_vpar->sequence.p_backward = NULL;
212 p_vpar->sequence.intra_quant.b_allocated = 0;
213 p_vpar->sequence.nonintra_quant.b_allocated = 0;
214 p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
215 p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
217 /* Initialize copyright information */
218 p_vpar->sequence.b_copyright_flag = 0;
219 p_vpar->sequence.b_original = 0;
220 p_vpar->sequence.i_copyright_id = 0;
221 p_vpar->sequence.i_copyright_nb = 0;
223 p_vpar->picture.p_picture = NULL;
224 p_vpar->picture.i_current_structure = 0;
226 /* Initialize other properties */
229 p_vpar->c_idle_loops = 0;
230 p_vpar->c_pictures = 0;
231 p_vpar->c_i_pictures = 0;
232 p_vpar->c_p_pictures = 0;
233 p_vpar->c_b_pictures = 0;
234 p_vpar->c_decoded_pictures = 0;
235 p_vpar->c_decoded_i_pictures = 0;
236 p_vpar->c_decoded_p_pictures = 0;
237 p_vpar->c_decoded_b_pictures = 0;
240 /* Initialize video FIFO */
241 vpar_InitFIFO( p_vpar );
243 memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
246 /* Spawn video_decoder threads */
247 /* FIXME: modify the number of vdecs at runtime ?? */
248 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
250 if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
256 /* Fake a video_decoder thread */
257 if( (p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t )))
258 == NULL || vdec_InitThread( p_vpar->pp_vdec[0] ) )
262 p_vpar->pp_vdec[0]->b_die = 0;
263 p_vpar->pp_vdec[0]->b_error = 0;
264 p_vpar->pp_vdec[0]->p_vpar = p_vpar;
267 /* Initialize lookup tables */
268 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
269 vpar_InitCrop( p_vpar );
271 vpar_InitMbAddrInc( p_vpar );
272 vpar_InitDCTTables( p_vpar );
273 vpar_InitPMBType( p_vpar );
274 vpar_InitBMBType( p_vpar );
275 vpar_InitDCTTables( p_vpar );
278 * Initialize the synchro properties
281 /* Get an possible synchro algorithm */
282 p_vpar->synchro.i_type = SynchroType();
285 p_vpar->synchro.i_last_pts = 0;
288 p_vpar->synchro.i_last_seen_I_pts = 0;
289 p_vpar->synchro.i_last_kept_I_pts = 0;
292 p_vpar->synchro.i_start = 0;
293 p_vpar->synchro.i_stop = 0;
295 /* mean decoding time - at least 200 ms for a slow machine */
296 p_vpar->synchro.i_delay = 200000;
297 p_vpar->synchro.i_theorical_delay = 40000; /* 25 fps */
298 /* assume we can display all Is and 2 Ps */
299 p_vpar->synchro.b_all_I = 1 << 10;
300 p_vpar->synchro.b_all_P = 0;
301 p_vpar->synchro.displayable_p = 2 << 10;
302 p_vpar->synchro.b_all_B = 0;
303 p_vpar->synchro.displayable_b = 0;
304 p_vpar->synchro.b_dropped_last = 0;
305 /* assume there were about 3 P and 6 B images between I's */
306 p_vpar->synchro.i_P_seen = p_vpar->synchro.i_P_kept = 1 << 10;
307 p_vpar->synchro.i_B_seen = p_vpar->synchro.i_B_kept = 1 << 10;
311 p_vpar->synchro.kludge_level = 5;
312 p_vpar->synchro.kludge_nbp = p_vpar->synchro.kludge_p = 5;
313 p_vpar->synchro.kludge_nbb = p_vpar->synchro.kludge_b = 6;
314 p_vpar->synchro.kludge_b = 0;
315 p_vpar->synchro.kludge_prevdate = 0;
319 p_vpar->synchro.i_current_frame_date = 0;
320 p_vpar->synchro.i_backward_frame_date = 0;
322 p_vpar->synchro.r_p_average = p_vpar->synchro.i_p_nb = 6;
323 p_vpar->synchro.r_b_average = p_vpar->synchro.i_b_nb = 6;
324 p_vpar->synchro.i_p_count = 0;
325 p_vpar->synchro.i_b_count = 0;
326 p_vpar->synchro.i_i_count = 0;
329 /* Mark thread as running and return */
330 intf_DbgMsg("vpar debug: InitThread(%p) succeeded\n", p_vpar);
334 /*****************************************************************************
335 * RunThread: generic parser thread
336 *****************************************************************************
337 * Video parser thread. This function only returns when the thread is
339 *****************************************************************************/
340 static void RunThread( vpar_thread_t *p_vpar )
342 intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)\n", p_vpar, getpid());
347 p_vpar->b_error = InitThread( p_vpar );
352 * Main loop - it is not executed if an error occured during
355 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
357 /* Find the next sequence header in the stream */
358 p_vpar->b_error = vpar_NextSequenceHeader( p_vpar );
361 p_vpar->c_sequences++;
364 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
366 /* Parse the next sequence, group or picture header */
367 if( vpar_ParseHeader( p_vpar ) )
369 /* End of sequence */
378 if( p_vpar->b_error )
380 ErrorThread( p_vpar );
389 /*****************************************************************************
390 * ErrorThread: RunThread() error loop
391 *****************************************************************************
392 * This function is called when an error occured during thread main's loop. The
393 * thread can still receive feed, but must be ready to terminate as soon as
395 *****************************************************************************/
396 static void ErrorThread( vpar_thread_t *p_vpar )
398 /* We take the lock, because we are going to read/write the start/end
399 * indexes of the decoder fifo */
400 vlc_mutex_lock( &p_vpar->fifo.data_lock );
402 /* Wait until a `die' order is sent */
403 while( !p_vpar->b_die )
405 /* Trash all received PES packets */
406 while( !DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
408 input_NetlistFreePES( p_vpar->bit_stream.p_input,
409 DECODER_FIFO_START(p_vpar->fifo) );
410 DECODER_FIFO_INCSTART( p_vpar->fifo );
413 /* Waiting for the input thread to put new PES packets in the fifo */
414 vlc_cond_wait( &p_vpar->fifo.data_wait, &p_vpar->fifo.data_lock );
417 /* We can release the lock before leaving */
418 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
421 /*****************************************************************************
422 * EndThread: thread destruction
423 *****************************************************************************
424 * This function is called when the thread ends after a sucessful
426 *****************************************************************************/
427 static void EndThread( vpar_thread_t *p_vpar )
433 intf_DbgMsg("vpar debug: destroying video parser thread %p\n", p_vpar);
436 /* Check for remaining PES packets */
440 /* Destroy thread structures allocated by InitThread */
441 // vout_DestroyStream( p_vpar->p_vout, p_vpar->i_stream );
444 /* Dispose of matrices if they have been allocated. */
445 if( p_vpar->sequence.intra_quant.b_allocated )
447 free( p_vpar->sequence.intra_quant.pi_matrix );
449 if( p_vpar->sequence.nonintra_quant.b_allocated )
451 free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
453 if( p_vpar->sequence.chroma_intra_quant.b_allocated )
455 free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
457 if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
459 free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
463 /* Destroy vdec threads */
464 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
466 if( p_vpar->pp_vdec[i_dummy] != NULL )
467 vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
472 free( p_vpar->pp_vdec[0] );
477 intf_DbgMsg("vpar debug: EndThread(%p)\n", p_vpar);
480 /*****************************************************************************
481 * SynchroType: Get the user's synchro type
482 *****************************************************************************
483 * This function is called at initialization.
484 *****************************************************************************/
485 static int SynchroType( )
487 char * psz_synchro = main_GetPszVariable( VPAR_SYNCHRO_VAR, NULL );
489 if( psz_synchro == NULL )
491 return VPAR_SYNCHRO_DEFAULT;
494 switch( *psz_synchro++ )
498 switch( *psz_synchro++ )
501 return VPAR_SYNCHRO_I;
504 if( *psz_synchro ) return 0;
505 return VPAR_SYNCHRO_Iplus;
509 switch( *psz_synchro++ )
512 return VPAR_SYNCHRO_IP;
515 if( *psz_synchro ) return 0;
516 return VPAR_SYNCHRO_IPplus;
520 if( *psz_synchro ) return 0;
521 return VPAR_SYNCHRO_IPB;
524 return VPAR_SYNCHRO_DEFAULT;
529 return VPAR_SYNCHRO_DEFAULT;
533 return VPAR_SYNCHRO_DEFAULT;