1 /*****************************************************************************
2 * video_parser.c : video parser thread
3 *****************************************************************************
4 * Copyright (C) 1999, 2000 VideoLAN
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public
19 * License along with this program; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
22 *****************************************************************************/
24 /* FIXME: passer en terminate/destroy avec les signaux supplémentaires ?? */
26 /*****************************************************************************
28 *****************************************************************************/
29 #include <stdlib.h> /* malloc(), free() */
30 #include <unistd.h> /* getpid() */
31 #include <sys/types.h> /* on BSD, uio.h needs types.h */
32 #include <sys/uio.h> /* "input.h" */
41 #include "debug.h" /* XXX?? temporaire, requis par netlist.h */
44 #include "input_netlist.h"
45 #include "decoder_fifo.h"
47 #include "video_output.h"
49 #include "vdec_idct.h"
50 #include "video_decoder.h"
51 #include "vdec_motion.h"
53 #include "vpar_blocks.h"
54 #include "vpar_headers.h"
55 #include "vpar_synchro.h"
56 #include "video_parser.h"
57 #include "video_fifo.h"
62 //static int CheckConfiguration ( video_cfg_t *p_cfg );
63 static int InitThread ( vpar_thread_t *p_vpar );
64 static void RunThread ( vpar_thread_t *p_vpar );
65 static void ErrorThread ( vpar_thread_t *p_vpar );
66 static void EndThread ( vpar_thread_t *p_vpar );
68 /*****************************************************************************
69 * vpar_CreateThread: create a generic parser thread
70 *****************************************************************************
71 * This function creates a new video parser thread, and returns a pointer
72 * to its description. On error, it returns NULL.
73 * Following configuration properties are used:
75 *****************************************************************************/
77 #include "interface.h"
78 extern main_t* p_main;
79 vpar_thread_t * vpar_CreateThread( /* video_cfg_t *p_cfg, */ input_thread_t *p_input /*,
80 vout_thread_t *p_vout, int *pi_status */ )
82 vpar_thread_t * p_vpar;
84 intf_DbgMsg("vpar debug: creating video parser thread\n");
86 /* Allocate the memory needed to store the thread's structure */
87 if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
89 intf_ErrMsg("vpar error: not enough memory for vpar_CreateThread() to create the new thread\n");
94 * Initialize the thread properties
100 * Initialize the input properties
102 /* Initialize the decoder fifo's data lock and conditional variable and set
103 * its buffer as empty */
104 vlc_mutex_init( &p_vpar->fifo.data_lock );
105 vlc_cond_init( &p_vpar->fifo.data_wait );
106 p_vpar->fifo.i_start = 0;
107 p_vpar->fifo.i_end = 0;
108 /* Initialize the bit stream structure */
109 p_vpar->bit_stream.p_input = p_input;
110 p_vpar->bit_stream.p_decoder_fifo = &p_vpar->fifo;
111 p_vpar->bit_stream.fifo.buffer = 0;
112 p_vpar->bit_stream.fifo.i_available = 0;
115 p_vpar->p_vout = p_main->p_intf->p_vout;
117 /* Spawn the video parser thread */
118 if ( vlc_thread_create(&p_vpar->thread_id, "video parser", (vlc_thread_func_t)RunThread, (void *)p_vpar) )
120 intf_ErrMsg("vpar error: can't spawn video parser thread\n");
125 intf_DbgMsg("vpar debug: video parser thread (%p) created\n", p_vpar);
129 /*****************************************************************************
130 * vpar_DestroyThread: destroy a generic parser thread
131 *****************************************************************************
132 * Destroy a terminated thread. This function will return 0 if the thread could
133 * be destroyed, and non 0 else. The last case probably means that the thread
134 * was still active, and another try may succeed.
135 *****************************************************************************/
136 void vpar_DestroyThread( vpar_thread_t *p_vpar /*, int *pi_status */ )
138 intf_DbgMsg("vpar debug: requesting termination of video parser thread %p\n", p_vpar);
140 /* Ask thread to kill itself */
142 /* Make sure the parser thread leaves the GetByte() function */
143 vlc_mutex_lock( &(p_vpar->fifo.data_lock) );
144 vlc_cond_signal( &(p_vpar->fifo.data_wait) );
145 vlc_mutex_unlock( &(p_vpar->fifo.data_lock) );
147 /* Waiting for the parser thread to exit */
148 /* Remove this as soon as the "status" flag is implemented */
149 vlc_thread_join( p_vpar->thread_id );
152 /* following functions are local */
154 /*****************************************************************************
155 * CheckConfiguration: check vpar_CreateThread() configuration
156 *****************************************************************************
157 * Set default parameters where required. In DEBUG mode, check if configuration
159 *****************************************************************************/
161 static int CheckConfiguration( video_cfg_t *p_cfg )
169 /*****************************************************************************
170 * InitThread: initialize vpar output thread
171 *****************************************************************************
172 * This function is called from RunThread and performs the second step of the
173 * initialization. It returns 0 on success. Note that the thread's flag are not
174 * modified inside this function.
175 *****************************************************************************/
176 static int InitThread( vpar_thread_t *p_vpar )
186 intf_DbgMsg("vpar debug: initializing video parser thread %p\n", p_vpar);
188 /* Our first job is to initialize the bit stream structure with the
189 * beginning of the input stream */
190 vlc_mutex_lock( &p_vpar->fifo.data_lock );
191 while ( DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
195 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
198 vlc_cond_wait( &p_vpar->fifo.data_wait, &p_vpar->fifo.data_lock );
200 p_vpar->bit_stream.p_ts = DECODER_FIFO_START( p_vpar->fifo )->p_first_ts;
201 p_vpar->bit_stream.p_byte = p_vpar->bit_stream.p_ts->buffer + p_vpar->bit_stream.p_ts->i_payload_start;
202 p_vpar->bit_stream.p_end = p_vpar->bit_stream.p_ts->buffer + p_vpar->bit_stream.p_ts->i_payload_end;
203 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
205 /* Initialize parsing data */
206 p_vpar->sequence.p_forward = NULL;
207 p_vpar->sequence.p_backward = NULL;
208 p_vpar->sequence.intra_quant.b_allocated = 0;
209 p_vpar->sequence.nonintra_quant.b_allocated = 0;
210 p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
211 p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
213 /* Initialize copyright information */
214 p_vpar->sequence.b_copyright_flag = 0;
215 p_vpar->sequence.b_original = 0;
216 p_vpar->sequence.i_copyright_id = 0;
217 p_vpar->sequence.i_copyright_nb = 0;
219 p_vpar->picture.p_picture = NULL;
220 p_vpar->picture.i_current_structure = 0;
222 /* Initialize other properties */
225 p_vpar->c_idle_loops = 0;
226 p_vpar->c_pictures = 0;
227 p_vpar->c_i_pictures = 0;
228 p_vpar->c_p_pictures = 0;
229 p_vpar->c_b_pictures = 0;
230 p_vpar->c_decoded_pictures = 0;
231 p_vpar->c_decoded_i_pictures = 0;
232 p_vpar->c_decoded_p_pictures = 0;
233 p_vpar->c_decoded_b_pictures = 0;
236 /* Initialize video FIFO */
237 vpar_InitFIFO( p_vpar );
239 memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
242 /* Spawn video_decoder threads */
243 /* FIXME: modify the number of vdecs at runtime ?? */
244 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
246 if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
252 /* Fake a video_decoder thread */
253 if( (p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t ))) == NULL
254 || vdec_InitThread( p_vpar->pp_vdec[0] ) )
258 p_vpar->pp_vdec[0]->b_die = 0;
259 p_vpar->pp_vdec[0]->b_error = 0;
260 p_vpar->pp_vdec[0]->p_vpar = p_vpar;
263 /* Initialize lookup tables */
264 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
265 vpar_InitCrop( p_vpar );
267 vpar_InitMbAddrInc( p_vpar );
268 vpar_InitDCTTables( p_vpar );
269 vpar_InitPMBType( p_vpar );
270 vpar_InitBMBType( p_vpar );
271 vpar_InitDCTTables( p_vpar );
275 * Initialize the synchro properties
278 p_vpar->synchro.i_last_decode_pts = 0;
279 p_vpar->synchro.i_last_display_pts = 0;
280 p_vpar->synchro.i_images_since_pts = 0;
282 p_vpar->synchro.i_last_i_pts = 0;
283 p_vpar->synchro.theorical_fps = 25;
284 p_vpar->synchro.i_last_nondropped_i_pts = 0;
285 p_vpar->synchro.actual_fps = 20;
287 p_vpar->synchro.i_fifo_start = 0;
288 p_vpar->synchro.i_fifo_stop = 0;
290 p_vpar->synchro.modulo = 0;
291 /* mean decoding time - at least 200 ms for a slow machine */
292 p_vpar->synchro.i_mean_decode_time = 200000;
293 /* assume we can display all Is and 2 Ps */
294 p_vpar->synchro.can_display_i = 1;
295 p_vpar->synchro.can_display_p = 0;
296 p_vpar->synchro.displayable_p = 2;
297 p_vpar->synchro.can_display_b = 0;
298 p_vpar->synchro.displayable_b = 0;
299 /* assume there were about 3 P and 6 B images between I's */
300 p_vpar->synchro.current_p_count = 1;
301 p_vpar->synchro.nondropped_p_count = 1;
302 p_vpar->synchro.p_count_predict = 3;
303 p_vpar->synchro.current_b_count = 1;
304 p_vpar->synchro.nondropped_b_count = 1;
305 p_vpar->synchro.b_count_predict = 6;
306 for( i_dummy = 0; i_dummy < 6; i_dummy++)
308 p_vpar->synchro.tab_p[i_dummy].mean = 3;
309 p_vpar->synchro.tab_p[i_dummy].deviation = .5;
310 p_vpar->synchro.tab_b[i_dummy].mean = 6;
311 p_vpar->synchro.tab_b[i_dummy].deviation = .5;
316 p_vpar->synchro.kludge_level = 5;
317 p_vpar->synchro.kludge_nbp = p_vpar->synchro.kludge_p = 5;
318 p_vpar->synchro.kludge_nbb = p_vpar->synchro.kludge_b = 6;
319 p_vpar->synchro.kludge_b = 0;
320 p_vpar->synchro.kludge_prevdate = 0;
324 p_vpar->synchro.i_current_frame_date = 0;
325 p_vpar->synchro.i_backward_frame_date = 0;
327 p_vpar->synchro.r_p_average = p_vpar->synchro.i_p_nb = 6;
328 p_vpar->synchro.r_b_average = p_vpar->synchro.i_b_nb = 6;
329 p_vpar->synchro.i_p_count = 0;
330 p_vpar->synchro.i_b_count = 0;
331 p_vpar->synchro.i_i_count = 0;
334 /* Mark thread as running and return */
335 intf_DbgMsg("vpar debug: InitThread(%p) succeeded\n", p_vpar);
339 /*****************************************************************************
340 * RunThread: generic parser thread
341 *****************************************************************************
342 * Video parser thread. This function does only returns when the thread is
344 *****************************************************************************/
345 static void RunThread( vpar_thread_t *p_vpar )
347 intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)\n", p_vpar, getpid());
352 p_vpar->b_error = InitThread( p_vpar );
357 * Main loop - it is not executed if an error occured during
360 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
362 /* Find the next sequence header in the stream */
363 p_vpar->b_error = vpar_NextSequenceHeader( p_vpar );
366 p_vpar->c_sequences++;
369 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
371 /* Parse the next sequence, group or picture header */
372 if( vpar_ParseHeader( p_vpar ) )
374 /* End of sequence */
383 if( p_vpar->b_error )
385 ErrorThread( p_vpar );
394 /*****************************************************************************
395 * ErrorThread: RunThread() error loop
396 *****************************************************************************
397 * This function is called when an error occured during thread main's loop. The
398 * thread can still receive feed, but must be ready to terminate as soon as
400 *****************************************************************************/
401 static void ErrorThread( vpar_thread_t *p_vpar )
403 /* We take the lock, because we are going to read/write the start/end
404 * indexes of the decoder fifo */
405 vlc_mutex_lock( &p_vpar->fifo.data_lock );
407 /* Wait until a `die' order is sent */
408 while( !p_vpar->b_die )
410 /* Trash all received PES packets */
411 while( !DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
413 input_NetlistFreePES( p_vpar->bit_stream.p_input, DECODER_FIFO_START(p_vpar->fifo) );
414 DECODER_FIFO_INCSTART( p_vpar->fifo );
417 /* Waiting for the input thread to put new PES packets in the fifo */
418 vlc_cond_wait( &p_vpar->fifo.data_wait, &p_vpar->fifo.data_lock );
421 /* We can release the lock before leaving */
422 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
425 /*****************************************************************************
426 * EndThread: thread destruction
427 *****************************************************************************
428 * This function is called when the thread ends after a sucessfull
430 *****************************************************************************/
431 static void EndThread( vpar_thread_t *p_vpar )
437 intf_DbgMsg("vpar debug: destroying video parser thread %p\n", p_vpar);
440 /* Check for remaining PES packets */
444 /* Destroy thread structures allocated by InitThread */
445 // vout_DestroyStream( p_vpar->p_vout, p_vpar->i_stream );
448 /* Dispose of matrices if they have been allocated. */
449 if( p_vpar->sequence.intra_quant.b_allocated )
451 free( p_vpar->sequence.intra_quant.pi_matrix );
453 if( p_vpar->sequence.nonintra_quant.b_allocated )
455 free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
457 if( p_vpar->sequence.chroma_intra_quant.b_allocated )
459 free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
461 if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
463 free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
467 /* Destroy vdec threads */
468 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
470 if( p_vpar->pp_vdec[i_dummy] != NULL )
471 vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
476 free( p_vpar->pp_vdec[0] );
481 intf_DbgMsg("vpar debug: EndThread(%p)\n", p_vpar);