git.sesse.net Git - vlc/blob - src/video_parser/video_parser.c

   1 /*****************************************************************************
   2  * video_parser.c : video parser thread
   3  *****************************************************************************
   4  * Copyright (C) 1999, 2000 VideoLAN
   5  *
   6  * Authors: Christophe Massiot <massiot@via.ecp.fr>
   7  *          Samuel Hocevar <sam@via.ecp.fr>
   8  *
   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.
  13  *
  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.
  18  *
  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  *****************************************************************************/
  23
  24 /* FIXME: passer en terminate/destroy avec les signaux supplémentaires ?? */
  25
  26 /*****************************************************************************
  27  * Preamble
  28  *****************************************************************************/
  29 #include "defs.h"
  30
  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" */
  35 #include <errno.h>
  36 #include <string.h>
  37
  38 #include "config.h"
  39 #include "common.h"
  40 #include "threads.h"
  41 #include "mtime.h"
  42 #include "plugins.h"
  43
  44 #include "intf_msg.h"
  45 #include "debug.h"                 /* XXX?? temporaire, requis par netlist.h */
  46
  47 #include "input.h"
  48 #include "input_netlist.h"
  49 #include "decoder_fifo.h"
  50 #include "video.h"
  51 #include "video_output.h"
  52
  53 #include "vdec_idct.h"
  54 #include "video_decoder.h"
  55 #include "vdec_motion.h"
  56
  57 #include "vpar_blocks.h"
  58 #include "vpar_headers.h"
  59 #include "vpar_synchro.h"
  60 #include "video_parser.h"
  61 #include "video_fifo.h"
  62
  63 /*
  64  * Local prototypes
  65  */
  66 //static int      CheckConfiguration  ( video_cfg_t *p_cfg );
  67 static int      InitThread          ( vpar_thread_t *p_vpar );
  68 static void     RunThread           ( vpar_thread_t *p_vpar );
  69 static void     ErrorThread         ( vpar_thread_t *p_vpar );
  70 static void     EndThread           ( vpar_thread_t *p_vpar );
  71
  72 /*****************************************************************************
  73  * vpar_CreateThread: create a generic parser thread
  74  *****************************************************************************
  75  * This function creates a new video parser thread, and returns a pointer
  76  * to its description. On error, it returns NULL.
  77  * Following configuration properties are used:
  78  * XXX??
  79  *****************************************************************************/
  80 #include "main.h"
  81 #include "interface.h"
  82 extern main_t *     p_main;
  83
  84 vpar_thread_t * vpar_CreateThread( /* video_cfg_t *p_cfg, */ input_thread_t *p_input /*,
  85                                    vout_thread_t *p_vout, int *pi_status */ )
  86 {
  87     vpar_thread_t *     p_vpar;
  88
  89     intf_DbgMsg( "vpar debug: creating video parser thread\n" );
  90
  91     /* Allocate the memory needed to store the thread's structure */
  92     if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
  93     {
  94         intf_ErrMsg( "vpar error: not enough memory "
  95                      "for vpar_CreateThread() to create the new thread\n");
  96         return( NULL );
  97     }
  98
  99     /*
 100      * Initialize the thread properties
 101      */
 102     p_vpar->b_die = 0;
 103     p_vpar->b_error = 0;
 104
 105     /*
 106      * Initialize the input properties
 107      */
 108     /* Initialize the decoder fifo's data lock and conditional variable
 109      * and set its buffer as empty */
 110     vlc_mutex_init( &p_vpar->fifo.data_lock );
 111     vlc_cond_init( &p_vpar->fifo.data_wait );
 112     p_vpar->fifo.i_start = 0;
 113     p_vpar->fifo.i_end = 0;
 114     /* Initialize the bit stream structure */
 115     p_vpar->bit_stream.p_input = p_input;
 116     p_vpar->bit_stream.p_decoder_fifo = &p_vpar->fifo;
 117     p_vpar->bit_stream.fifo.buffer = 0;
 118     p_vpar->bit_stream.fifo.i_available = 0;
 119
 120     /* FIXME !!!!?? */
 121     p_vpar->p_vout = p_main->p_intf->p_vout;
 122
 123     /* Spawn the video parser thread */
 124     if ( vlc_thread_create( &p_vpar->thread_id, "video parser",
 125                             (vlc_thread_func_t)RunThread, (void *)p_vpar ) )
 126     {
 127         intf_ErrMsg("vpar error: can't spawn video parser thread\n");
 128         free( p_vpar );
 129         return( NULL );
 130     }
 131
 132     intf_DbgMsg("vpar debug: video parser thread (%p) created\n", p_vpar);
 133     return( p_vpar );
 134 }
 135
 136 /*****************************************************************************
 137  * vpar_DestroyThread: destroy a generic parser thread
 138  *****************************************************************************
 139  * Destroy a terminated thread. This function will return 0 if the thread could
 140  * be destroyed, and non 0 else. The last case probably means that the thread
 141  * was still active, and another try may succeed.
 142  *****************************************************************************/
 143 void vpar_DestroyThread( vpar_thread_t *p_vpar /*, int *pi_status */ )
 144 {
 145     intf_DbgMsg( "vpar debug: requesting termination of "
 146                  "video parser thread %p\n", p_vpar);
 147
 148     /* Ask thread to kill itself */
 149     p_vpar->b_die = 1;
 150     /* Make sure the parser thread leaves the GetByte() function */
 151     vlc_mutex_lock( &(p_vpar->fifo.data_lock) );
 152     vlc_cond_signal( &(p_vpar->fifo.data_wait) );
 153     vlc_mutex_unlock( &(p_vpar->fifo.data_lock) );
 154
 155     /* Waiting for the parser thread to exit */
 156     /* Remove this as soon as the "status" flag is implemented */
 157     vlc_thread_join( p_vpar->thread_id );
 158 }
 159
 160 /* following functions are local */
 161
 162 /*****************************************************************************
 163  * CheckConfiguration: check vpar_CreateThread() configuration
 164  *****************************************************************************
 165  * Set default parameters where required. In DEBUG mode, check if configuration
 166  * is valid.
 167  *****************************************************************************/
 168 #if 0
 169 static int CheckConfiguration( video_cfg_t *p_cfg )
 170 {
 171     /* XXX?? */
 172
 173     return( 0 );
 174 }
 175 #endif
 176
 177 /*****************************************************************************
 178  * InitThread: initialize vpar output thread
 179  *****************************************************************************
 180  * This function is called from RunThread and performs the second step of the
 181  * initialization. It returns 0 on success. Note that the thread's flag are not
 182  * modified inside this function.
 183  *****************************************************************************/
 184 static int InitThread( vpar_thread_t *p_vpar )
 185 {
 186 #ifdef VDEC_SMP
 187     int i_dummy;
 188 #endif
 189
 190     intf_DbgMsg("vpar debug: initializing video parser thread %p\n", p_vpar);
 191
 192     /* Our first job is to initialize the bit stream structure with the
 193      * beginning of the input stream */
 194     vlc_mutex_lock( &p_vpar->fifo.data_lock );
 195     while ( DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
 196     {
 197         if ( p_vpar->b_die )
 198         {
 199             vlc_mutex_unlock( &p_vpar->fifo.data_lock );
 200             return( 1 );
 201         }
 202         vlc_cond_wait( &p_vpar->fifo.data_wait, &p_vpar->fifo.data_lock );
 203     }
 204     p_vpar->bit_stream.p_ts = DECODER_FIFO_START( p_vpar->fifo )->p_first_ts;
 205     p_vpar->bit_stream.p_byte = p_vpar->bit_stream.p_ts->buffer
 206                                 + p_vpar->bit_stream.p_ts->i_payload_start;
 207     p_vpar->bit_stream.p_end = p_vpar->bit_stream.p_ts->buffer
 208                                + p_vpar->bit_stream.p_ts->i_payload_end;
 209     vlc_mutex_unlock( &p_vpar->fifo.data_lock );
 210
 211     /* Initialize parsing data */
 212     p_vpar->sequence.p_forward = NULL;
 213     p_vpar->sequence.p_backward = NULL;
 214     p_vpar->sequence.intra_quant.b_allocated = 0;
 215     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 216     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 217     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 218
 219     /* Initialize copyright information */
 220     p_vpar->sequence.b_copyright_flag = 0;
 221     p_vpar->sequence.b_original = 0;
 222     p_vpar->sequence.i_copyright_id = 0;
 223     p_vpar->sequence.i_copyright_nb = 0;
 224
 225     p_vpar->picture.p_picture = NULL;
 226     p_vpar->picture.i_current_structure = 0;
 227
 228     /* Initialize other properties */
 229 #ifdef STATS
 230     p_vpar->c_loops = 0;
 231     p_vpar->c_sequences = 0;
 232     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 233     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 234     memset(p_vpar->pc_malformed_pictures, 0,
 235            sizeof(p_vpar->pc_malformed_pictures));
 236 #endif
 237
 238     /* Initialize video FIFO */
 239     vpar_InitFIFO( p_vpar );
 240
 241     memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
 242
 243 #ifdef VDEC_SMP
 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++ )
 247     {
 248         if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
 249         {
 250             return( 1 );
 251         }
 252     }
 253 #else
 254     /* Fake a video_decoder thread */
 255     if( (p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t )))
 256          == NULL || vdec_InitThread( p_vpar->pp_vdec[0] ) )
 257     {
 258         return( 1 );
 259     }
 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;
 263
 264     /* Re-nice ourself */
 265     if( nice(VDEC_NICE) == -1 )
 266     {
 267         intf_WarnMsg( 2, "vpar warning : couldn't nice() (%s)\n",
 268                       strerror(errno) );
 269     }
 270 #endif
 271
 272     /* Initialize lookup tables */
 273 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
 274     vpar_InitCrop( p_vpar );
 275 #endif
 276     vpar_InitMbAddrInc( p_vpar );
 277     vpar_InitDCTTables( p_vpar );
 278     vpar_InitPMBType( p_vpar );
 279     vpar_InitBMBType( p_vpar );
 280     vpar_InitDCTTables( p_vpar );
 281
 282     /*
 283      * Initialize the synchro properties
 284      */
 285     vpar_SynchroInit( p_vpar );
 286
 287     /* Mark thread as running and return */
 288     intf_DbgMsg("vpar debug: InitThread(%p) succeeded\n", p_vpar);
 289     return( 0 );
 290 }
 291
 292 /*****************************************************************************
 293  * RunThread: generic parser thread
 294  *****************************************************************************
 295  * Video parser thread. This function only returns when the thread is
 296  * terminated.
 297  *****************************************************************************/
 298 static void RunThread( vpar_thread_t *p_vpar )
 299 {
 300     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)\n", p_vpar, getpid());
 301
 302     /*
 303      * Initialize thread
 304      */
 305     p_vpar->b_error = InitThread( p_vpar );
 306
 307     p_vpar->b_run = 1;
 308
 309     /*
 310      * Main loop - it is not executed if an error occured during
 311      * initialization
 312      */
 313     while( (!p_vpar->b_die) && (!p_vpar->b_error) )
 314     {
 315         /* Find the next sequence header in the stream */
 316         p_vpar->b_error = vpar_NextSequenceHeader( p_vpar );
 317
 318         while( (!p_vpar->b_die) && (!p_vpar->b_error) )
 319         {
 320 #ifdef STATS
 321             p_vpar->c_loops++;
 322 #endif
 323             /* Parse the next sequence, group or picture header */
 324             if( vpar_ParseHeader( p_vpar ) )
 325             {
 326                 /* End of sequence */
 327                 break;
 328             };
 329         }
 330     }
 331
 332     /*
 333      * Error loop
 334      */
 335     if( p_vpar->b_error )
 336     {
 337         ErrorThread( p_vpar );
 338     }
 339
 340     p_vpar->b_run = 0;
 341
 342     /* End of thread */
 343     EndThread( p_vpar );
 344 }
 345
 346 /*****************************************************************************
 347  * ErrorThread: RunThread() error loop
 348  *****************************************************************************
 349  * This function is called when an error occured during thread main's loop. The
 350  * thread can still receive feed, but must be ready to terminate as soon as
 351  * possible.
 352  *****************************************************************************/
 353 static void ErrorThread( vpar_thread_t *p_vpar )
 354 {
 355     /* We take the lock, because we are going to read/write the start/end
 356      * indexes of the decoder fifo */
 357     vlc_mutex_lock( &p_vpar->fifo.data_lock );
 358
 359     /* Wait until a `die' order is sent */
 360     while( !p_vpar->b_die )
 361     {
 362         /* Trash all received PES packets */
 363         while( !DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
 364         {
 365             input_NetlistFreePES( p_vpar->bit_stream.p_input,
 366                                   DECODER_FIFO_START(p_vpar->fifo) );
 367             DECODER_FIFO_INCSTART( p_vpar->fifo );
 368         }
 369
 370         /* Waiting for the input thread to put new PES packets in the fifo */
 371         vlc_cond_wait( &p_vpar->fifo.data_wait, &p_vpar->fifo.data_lock );
 372     }
 373
 374     /* We can release the lock before leaving */
 375     vlc_mutex_unlock( &p_vpar->fifo.data_lock );
 376 }
 377
 378 /*****************************************************************************
 379  * EndThread: thread destruction
 380  *****************************************************************************
 381  * This function is called when the thread ends after a sucessful
 382  * initialization.
 383  *****************************************************************************/
 384 static void EndThread( vpar_thread_t *p_vpar )
 385 {
 386 #ifdef VDEC_SMP
 387     int i_dummy;
 388 #endif
 389
 390     intf_DbgMsg("vpar debug: destroying video parser thread %p\n", p_vpar);
 391
 392 #ifdef DEBUG
 393     /* Check for remaining PES packets */
 394     /* XXX?? */
 395 #endif
 396
 397 #ifdef STATS
 398     intf_Msg("vpar stats: %d loops among %d sequence(s)\n",
 399              p_vpar->c_loops, p_vpar->c_sequences);
 400     intf_Msg("vpar stats: Read %d frames/fields (I %d/P %d/B %d)\n",
 401              p_vpar->pc_pictures[I_CODING_TYPE]
 402              + p_vpar->pc_pictures[P_CODING_TYPE]
 403              + p_vpar->pc_pictures[B_CODING_TYPE],
 404              p_vpar->pc_pictures[I_CODING_TYPE],
 405              p_vpar->pc_pictures[P_CODING_TYPE],
 406              p_vpar->pc_pictures[B_CODING_TYPE]);
 407     intf_Msg("vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)\n",
 408              p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 409              + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 410              + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 411              p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 412              p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 413              p_vpar->pc_decoded_pictures[B_CODING_TYPE]);
 414     intf_Msg("vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)\n",
 415              p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 416              + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 417              + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 418              p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 419              p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 420              p_vpar->pc_malformed_pictures[B_CODING_TYPE]);
 421 #define S   p_vpar->sequence
 422     intf_Msg("vpar info: %s stream (%dx%d), %d/1001 pi/s\n",
 423              S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 424              S.i_width, S.i_height, S.i_frame_rate);
 425     intf_Msg("vpar info: %s, %s, matrix_coeff: %d\n",
 426              S.b_progressive ? "Progressive" : "Non-progressive",
 427              S.i_scalable_mode ? "scalable" : "non-scalable",
 428              S.i_matrix_coefficients);
 429 #endif
 430
 431     /* Destroy thread structures allocated by InitThread */
 432 //    vout_DestroyStream( p_vpar->p_vout, p_vpar->i_stream );
 433     /* XXX?? */
 434
 435     /* Dispose of matrices if they have been allocated. */
 436     if( p_vpar->sequence.intra_quant.b_allocated )
 437     {
 438         free( p_vpar->sequence.intra_quant.pi_matrix );
 439     }
 440     if( p_vpar->sequence.nonintra_quant.b_allocated )
 441     {
 442         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 443     }
 444     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 445     {
 446         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 447     }
 448     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 449     {
 450         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 451     }
 452
 453 #ifdef VDEC_SMP
 454     /* Destroy vdec threads */
 455     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 456     {
 457         if( p_vpar->pp_vdec[i_dummy] != NULL )
 458             vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
 459         else
 460             break;
 461     }
 462 #else
 463     free( p_vpar->pp_vdec[0] );
 464 #endif
 465
 466     free( p_vpar );
 467
 468     intf_DbgMsg("vpar debug: EndThread(%p)\n", p_vpar);
 469 }