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 *****************************************************************************/
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 );
70 /*****************************************************************************
71 * vpar_CreateThread: create a generic parser thread
72 *****************************************************************************
73 * This function creates a new video parser thread, and returns a pointer
74 * to its description. On error, it returns NULL.
75 * Following configuration properties are used:
77 *****************************************************************************/
79 #include "interface.h"
80 extern main_t* p_main;
81 vpar_thread_t * vpar_CreateThread( /* video_cfg_t *p_cfg, */ input_thread_t *p_input /*,
82 vout_thread_t *p_vout, int *pi_status */ )
84 vpar_thread_t * p_vpar;
86 intf_DbgMsg("vpar debug: creating video parser thread\n");
88 /* Allocate the memory needed to store the thread's structure */
89 if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
91 intf_ErrMsg("vpar error: not enough memory for vpar_CreateThread() to create the new thread\n");
96 * Initialize the thread properties
102 * Initialize the input properties
104 /* Initialize the decoder fifo's data lock and conditional variable and set
105 * its buffer as empty */
106 vlc_mutex_init( &p_vpar->fifo.data_lock );
107 vlc_cond_init( &p_vpar->fifo.data_wait );
108 p_vpar->fifo.i_start = 0;
109 p_vpar->fifo.i_end = 0;
110 /* Initialize the bit stream structure */
111 p_vpar->bit_stream.p_input = p_input;
112 p_vpar->bit_stream.p_decoder_fifo = &p_vpar->fifo;
113 p_vpar->bit_stream.fifo.buffer = 0;
114 p_vpar->bit_stream.fifo.i_available = 0;
117 p_vpar->p_vout = p_main->p_intf->p_vout;
119 /* Spawn the video parser thread */
120 if ( vlc_thread_create(&p_vpar->thread_id, "video parser", (vlc_thread_func_t)RunThread, (void *)p_vpar) )
122 intf_ErrMsg("vpar error: can't spawn video parser thread\n");
127 intf_DbgMsg("vpar debug: video parser thread (%p) created\n", p_vpar);
131 /*****************************************************************************
132 * vpar_DestroyThread: destroy a generic parser thread
133 *****************************************************************************
134 * Destroy a terminated thread. This function will return 0 if the thread could
135 * be destroyed, and non 0 else. The last case probably means that the thread
136 * was still active, and another try may succeed.
137 *****************************************************************************/
138 void vpar_DestroyThread( vpar_thread_t *p_vpar /*, int *pi_status */ )
140 intf_DbgMsg("vpar debug: requesting termination of video parser thread %p\n", p_vpar);
142 /* Ask thread to kill itself */
144 /* Make sure the parser thread leaves the GetByte() function */
145 vlc_mutex_lock( &(p_vpar->fifo.data_lock) );
146 vlc_cond_signal( &(p_vpar->fifo.data_wait) );
147 vlc_mutex_unlock( &(p_vpar->fifo.data_lock) );
149 /* Waiting for the parser thread to exit */
150 /* Remove this as soon as the "status" flag is implemented */
151 vlc_thread_join( p_vpar->thread_id );
154 /* following functions are local */
156 /*****************************************************************************
157 * CheckConfiguration: check vpar_CreateThread() configuration
158 *****************************************************************************
159 * Set default parameters where required. In DEBUG mode, check if configuration
161 *****************************************************************************/
163 static int CheckConfiguration( video_cfg_t *p_cfg )
171 /*****************************************************************************
172 * InitThread: initialize vpar output thread
173 *****************************************************************************
174 * This function is called from RunThread and performs the second step of the
175 * initialization. It returns 0 on success. Note that the thread's flag are not
176 * modified inside this function.
177 *****************************************************************************/
178 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 + p_vpar->bit_stream.p_ts->i_payload_start;
204 p_vpar->bit_stream.p_end = p_vpar->bit_stream.p_ts->buffer + p_vpar->bit_stream.p_ts->i_payload_end;
205 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
207 /* Initialize parsing data */
208 p_vpar->sequence.p_forward = NULL;
209 p_vpar->sequence.p_backward = NULL;
210 p_vpar->sequence.intra_quant.b_allocated = 0;
211 p_vpar->sequence.nonintra_quant.b_allocated = 0;
212 p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
213 p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
215 /* Initialize copyright information */
216 p_vpar->sequence.b_copyright_flag = 0;
217 p_vpar->sequence.b_original = 0;
218 p_vpar->sequence.i_copyright_id = 0;
219 p_vpar->sequence.i_copyright_nb = 0;
221 p_vpar->picture.p_picture = NULL;
222 p_vpar->picture.i_current_structure = 0;
224 /* Initialize other properties */
227 p_vpar->c_idle_loops = 0;
228 p_vpar->c_pictures = 0;
229 p_vpar->c_i_pictures = 0;
230 p_vpar->c_p_pictures = 0;
231 p_vpar->c_b_pictures = 0;
232 p_vpar->c_decoded_pictures = 0;
233 p_vpar->c_decoded_i_pictures = 0;
234 p_vpar->c_decoded_p_pictures = 0;
235 p_vpar->c_decoded_b_pictures = 0;
238 /* Initialize video FIFO */
239 vpar_InitFIFO( p_vpar );
241 memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
244 /* Spawn video_decoder threads */
245 /* FIXME: modify the number of vdecs at runtime ?? */
246 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
248 if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
254 /* Fake a video_decoder thread */
255 if( (p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t ))) == NULL
256 || vdec_InitThread( p_vpar->pp_vdec[0] ) )
260 p_vpar->pp_vdec[0]->b_die = 0;
261 p_vpar->pp_vdec[0]->b_error = 0;
262 p_vpar->pp_vdec[0]->p_vpar = p_vpar;
265 /* Initialize lookup tables */
266 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
267 vpar_InitCrop( p_vpar );
269 vpar_InitMbAddrInc( p_vpar );
270 vpar_InitDCTTables( p_vpar );
271 vpar_InitPMBType( p_vpar );
272 vpar_InitBMBType( p_vpar );
273 vpar_InitDCTTables( p_vpar );
277 * Initialize the synchro properties
280 p_vpar->synchro.i_last_decode_pts = 0;
281 p_vpar->synchro.i_last_display_pts = 0;
282 p_vpar->synchro.i_images_since_pts = 0;
284 p_vpar->synchro.i_last_i_pts = 0;
285 p_vpar->synchro.theorical_fps = 25;
286 p_vpar->synchro.i_last_nondropped_i_pts = 0;
287 p_vpar->synchro.actual_fps = 20;
289 p_vpar->synchro.i_fifo_start = 0;
290 p_vpar->synchro.i_fifo_stop = 0;
292 p_vpar->synchro.modulo = 0;
293 /* mean decoding time - at least 200 ms for a slow machine */
294 p_vpar->synchro.i_mean_decode_time = 200000;
295 /* assume we can display all Is and 2 Ps */
296 p_vpar->synchro.can_display_i = 1;
297 p_vpar->synchro.can_display_p = 0;
298 p_vpar->synchro.displayable_p = 2;
299 p_vpar->synchro.can_display_b = 0;
300 p_vpar->synchro.displayable_b = 0;
301 /* assume there were about 3 P and 6 B images between I's */
302 p_vpar->synchro.current_p_count = 1;
303 p_vpar->synchro.nondropped_p_count = 1;
304 p_vpar->synchro.p_count_predict = 3;
305 p_vpar->synchro.current_b_count = 1;
306 p_vpar->synchro.nondropped_b_count = 1;
307 p_vpar->synchro.b_count_predict = 6;
308 for( i_dummy = 0; i_dummy < 6; i_dummy++)
310 p_vpar->synchro.tab_p[i_dummy].mean = 3;
311 p_vpar->synchro.tab_p[i_dummy].deviation = .5;
312 p_vpar->synchro.tab_b[i_dummy].mean = 6;
313 p_vpar->synchro.tab_b[i_dummy].deviation = .5;
318 p_vpar->synchro.kludge_level = 5;
319 p_vpar->synchro.kludge_nbp = p_vpar->synchro.kludge_p = 5;
320 p_vpar->synchro.kludge_nbb = p_vpar->synchro.kludge_b = 6;
321 p_vpar->synchro.kludge_b = 0;
322 p_vpar->synchro.kludge_prevdate = 0;
326 p_vpar->synchro.i_current_frame_date = 0;
327 p_vpar->synchro.i_backward_frame_date = 0;
329 p_vpar->synchro.r_p_average = p_vpar->synchro.i_p_nb = 6;
330 p_vpar->synchro.r_b_average = p_vpar->synchro.i_b_nb = 6;
331 p_vpar->synchro.i_p_count = 0;
332 p_vpar->synchro.i_b_count = 0;
333 p_vpar->synchro.i_i_count = 0;
336 /* Mark thread as running and return */
337 intf_DbgMsg("vpar debug: InitThread(%p) succeeded\n", p_vpar);
341 /*****************************************************************************
342 * RunThread: generic parser thread
343 *****************************************************************************
344 * Video parser thread. This function does only returns when the thread is
346 *****************************************************************************/
347 static void RunThread( vpar_thread_t *p_vpar )
349 intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)\n", p_vpar, getpid());
354 p_vpar->b_error = InitThread( p_vpar );
359 * Main loop - it is not executed if an error occured during
362 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
364 /* Find the next sequence header in the stream */
365 p_vpar->b_error = vpar_NextSequenceHeader( p_vpar );
368 p_vpar->c_sequences++;
371 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
373 /* Parse the next sequence, group or picture header */
374 if( vpar_ParseHeader( p_vpar ) )
376 /* End of sequence */
385 if( p_vpar->b_error )
387 ErrorThread( p_vpar );
396 /*****************************************************************************
397 * ErrorThread: RunThread() error loop
398 *****************************************************************************
399 * This function is called when an error occured during thread main's loop. The
400 * thread can still receive feed, but must be ready to terminate as soon as
402 *****************************************************************************/
403 static void ErrorThread( vpar_thread_t *p_vpar )
405 /* We take the lock, because we are going to read/write the start/end
406 * indexes of the decoder fifo */
407 vlc_mutex_lock( &p_vpar->fifo.data_lock );
409 /* Wait until a `die' order is sent */
410 while( !p_vpar->b_die )
412 /* Trash all received PES packets */
413 while( !DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
415 input_NetlistFreePES( p_vpar->bit_stream.p_input, DECODER_FIFO_START(p_vpar->fifo) );
416 DECODER_FIFO_INCSTART( p_vpar->fifo );
419 /* Waiting for the input thread to put new PES packets in the fifo */
420 vlc_cond_wait( &p_vpar->fifo.data_wait, &p_vpar->fifo.data_lock );
423 /* We can release the lock before leaving */
424 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
427 /*****************************************************************************
428 * EndThread: thread destruction
429 *****************************************************************************
430 * This function is called when the thread ends after a sucessfull
432 *****************************************************************************/
433 static void EndThread( vpar_thread_t *p_vpar )
439 intf_DbgMsg("vpar debug: destroying video parser thread %p\n", p_vpar);
442 /* Check for remaining PES packets */
446 /* Destroy thread structures allocated by InitThread */
447 // vout_DestroyStream( p_vpar->p_vout, p_vpar->i_stream );
450 /* Dispose of matrices if they have been allocated. */
451 if( p_vpar->sequence.intra_quant.b_allocated )
453 free( p_vpar->sequence.intra_quant.pi_matrix );
455 if( p_vpar->sequence.nonintra_quant.b_allocated )
457 free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
459 if( p_vpar->sequence.chroma_intra_quant.b_allocated )
461 free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
463 if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
465 free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
469 /* Destroy vdec threads */
470 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
472 if( p_vpar->pp_vdec[i_dummy] != NULL )
473 vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
478 free( p_vpar->pp_vdec[0] );
483 intf_DbgMsg("vpar debug: EndThread(%p)\n", p_vpar);