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  * $Id: video_parser.c,v 1.86 2001/05/30 17:03:13 sam Exp $
   6  *
   7  * Authors: Christophe Massiot <massiot@via.ecp.fr>
   8  *          Samuel Hocevar <sam@via.ecp.fr>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include "defs.h"
  29
  30 #include <stdlib.h>                                      /* malloc(), free() */
  31 #include <unistd.h>                                              /* getpid() */
  32 #include <errno.h>
  33 #include <string.h>
  34
  35 #ifdef STATS
  36 #  include <sys/times.h>
  37 #endif
  38
  39 #include "config.h"
  40 #include "common.h"
  41 #include "threads.h"
  42 #include "mtime.h"
  43 #include "modules.h"
  44
  45 #include "intf_msg.h"
  46
  47 #include "stream_control.h"
  48 #include "input_ext-dec.h"
  49
  50 #include "video.h"
  51 #include "video_output.h"
  52
  53 #include "video_decoder.h"
  54 #include "vdec_motion.h"
  55
  56 #include "vpar_blocks.h"
  57 #include "vpar_headers.h"
  58 #include "vpar_synchro.h"
  59 #include "video_parser.h"
  60 #include "video_fifo.h"
  61
  62 /*
  63  * Local prototypes
  64  */
  65 static int      InitThread          ( vpar_thread_t * );
  66 static void     RunThread           ( vpar_thread_t * );
  67 static void     ErrorThread         ( vpar_thread_t * );
  68 static void     EndThread           ( vpar_thread_t * );
  69 static void     BitstreamCallback   ( bit_stream_t *, boolean_t );
  70
  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  *****************************************************************************/
  77 vlc_thread_t vpar_CreateThread( vdec_config_t * p_config )
  78 {
  79     vpar_thread_t *     p_vpar;
  80
  81     intf_DbgMsg( "vpar debug: creating video parser thread" );
  82
  83     /* Allocate the memory needed to store the thread's structure */
  84     if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
  85     {
  86         intf_ErrMsg( "vpar error: not enough memory "
  87                      "for vpar_CreateThread() to create the new thread");
  88         return( 0 );
  89     }
  90
  91     /*
  92      * Initialize the thread properties
  93      */
  94     p_vpar->p_fifo = p_config->decoder_config.p_decoder_fifo;
  95     p_vpar->p_config = p_config;
  96     p_vpar->p_vout = NULL;
  97
  98     /*
  99      * Choose the best motion compensation module
 100      */
 101     p_vpar->p_motion_module = module_Need( MODULE_CAPABILITY_MOTION, NULL );
 102
 103     if( p_vpar->p_motion_module == NULL )
 104     {
 105         intf_ErrMsg( "vpar error: no suitable motion compensation module" );
 106         free( p_vpar );
 107         return( 0 );
 108     }
 109
 110 #define M ( p_vpar->pppf_motion )
 111 #define S ( p_vpar->ppf_motion_skipped )
 112 #define F ( p_vpar->p_motion_module->p_functions->motion.functions.motion )
 113     M[0][0][0] = M[0][0][1] = M[0][0][2] = M[0][0][3] = NULL;
 114     M[0][1][0] = M[0][1][1] = M[0][1][2] = M[0][1][3] = NULL;
 115     M[1][0][0] = NULL;
 116     M[1][1][0] = NULL;
 117     M[2][0][0] = NULL;
 118     M[2][1][0] = NULL;
 119     M[3][0][0] = NULL;
 120     M[3][1][0] = NULL;
 121
 122     M[1][0][1] = F.pf_field_field_420;
 123     M[1][1][1] = F.pf_frame_field_420;
 124     M[2][0][1] = F.pf_field_field_422;
 125     M[2][1][1] = F.pf_frame_field_422;
 126     M[3][0][1] = F.pf_field_field_444;
 127     M[3][1][1] = F.pf_frame_field_444;
 128
 129     M[1][0][2] = F.pf_field_16x8_420;
 130     M[1][1][2] = F.pf_frame_frame_420;
 131     M[2][0][2] = F.pf_field_16x8_422;
 132     M[2][1][2] = F.pf_frame_frame_422;
 133     M[3][0][2] = F.pf_field_16x8_444;
 134     M[3][1][2] = F.pf_frame_frame_444;
 135
 136     M[1][0][3] = F.pf_field_dmv_420;
 137     M[1][1][3] = F.pf_frame_dmv_420;
 138     M[2][0][3] = F.pf_field_dmv_422;
 139     M[2][1][3] = F.pf_frame_dmv_422;
 140     M[3][0][3] = F.pf_field_dmv_444;
 141     M[3][1][3] = F.pf_frame_dmv_444;
 142
 143     S[0][0] = S[0][1] = S[0][2] = S[0][3] = NULL;
 144     S[1][0] = NULL;
 145     S[2][0] = NULL;
 146     S[3][0] = NULL;
 147
 148     S[1][1] = F.pf_field_field_420;
 149     S[2][1] = F.pf_field_field_422;
 150     S[3][1] = F.pf_field_field_444;
 151
 152     S[1][2] = F.pf_field_field_420;
 153     S[2][2] = F.pf_field_field_422;
 154     S[3][2] = F.pf_field_field_444;
 155
 156     S[1][3] = F.pf_frame_frame_420;
 157     S[2][3] = F.pf_frame_frame_422;
 158     S[3][3] = F.pf_frame_frame_444;
 159 #undef F
 160 #undef S
 161 #undef M
 162
 163      /*
 164       * Choose the best IDCT module
 165       */
 166     p_vpar->p_idct_module = module_Need( MODULE_CAPABILITY_IDCT, NULL );
 167
 168     if( p_vpar->p_idct_module == NULL )
 169     {
 170         intf_ErrMsg( "vpar error: no suitable IDCT module" );
 171         module_Unneed( p_vpar->p_motion_module );
 172         free( p_vpar );
 173         return( 0 );
 174     }
 175
 176 #define f p_vpar->p_idct_module->p_functions->idct.functions.idct
 177     p_vpar->pf_idct_init    = f.pf_idct_init;
 178     p_vpar->pf_sparse_idct  = f.pf_sparse_idct;
 179     p_vpar->pf_idct         = f.pf_idct;
 180     p_vpar->pf_norm_scan    = f.pf_norm_scan;
 181     p_vpar->pf_decode_init  = f.pf_decode_init;
 182     p_vpar->pf_decode_mb_c  = f.pf_decode_mb_c;
 183     p_vpar->pf_decode_mb_bw = f.pf_decode_mb_bw;
 184 #undef f
 185
 186     /* Spawn the video parser thread */
 187     if ( vlc_thread_create( &p_vpar->thread_id, "video parser",
 188                             (vlc_thread_func_t)RunThread, (void *)p_vpar ) )
 189     {
 190         intf_ErrMsg("vpar error: can't spawn video parser thread");
 191         module_Unneed( p_vpar->p_idct_module );
 192         module_Unneed( p_vpar->p_motion_module );
 193         free( p_vpar );
 194         return( 0 );
 195     }
 196
 197     intf_DbgMsg("vpar debug: video parser thread (%p) created", p_vpar);
 198     return( p_vpar->thread_id );
 199 }
 200
 201 /* following functions are local */
 202
 203 /*****************************************************************************
 204  * InitThread: initialize vpar output thread
 205  *****************************************************************************
 206  * This function is called from RunThread and performs the second step of the
 207  * initialization. It returns 0 on success. Note that the thread's flag are not
 208  * modified inside this function.
 209  *****************************************************************************/
 210 static int InitThread( vpar_thread_t *p_vpar )
 211 {
 212 #ifdef VDEC_SMP
 213     int i_dummy;
 214 #endif
 215
 216     intf_DbgMsg("vpar debug: initializing video parser thread %p", p_vpar);
 217
 218     p_vpar->p_config->decoder_config.pf_init_bit_stream( &p_vpar->bit_stream,
 219         p_vpar->p_config->decoder_config.p_decoder_fifo, BitstreamCallback,
 220         (void *)p_vpar );
 221
 222     /* Initialize parsing data */
 223     p_vpar->sequence.p_forward = NULL;
 224     p_vpar->sequence.p_backward = NULL;
 225     p_vpar->sequence.intra_quant.b_allocated = 0;
 226     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 227     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 228     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 229     p_vpar->sequence.i_matrix_coefficients = 1;
 230     p_vpar->sequence.next_pts = p_vpar->sequence.next_dts = 0;
 231     p_vpar->sequence.b_expect_discontinuity = 0;
 232
 233     /* Initialize copyright information */
 234     p_vpar->sequence.b_copyright_flag = 0;
 235     p_vpar->sequence.b_original = 0;
 236     p_vpar->sequence.i_copyright_id = 0;
 237     p_vpar->sequence.i_copyright_nb = 0;
 238
 239     p_vpar->picture.p_picture = NULL;
 240     p_vpar->picture.i_current_structure = 0;
 241
 242     /* Initialize other properties */
 243 #ifdef STATS
 244     p_vpar->c_loops = 0;
 245     p_vpar->c_sequences = 0;
 246     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 247     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 248     memset(p_vpar->pc_malformed_pictures, 0,
 249            sizeof(p_vpar->pc_malformed_pictures));
 250 #endif
 251
 252     /* Initialize video FIFO */
 253     vpar_InitFIFO( p_vpar );
 254
 255     memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
 256
 257 #ifdef VDEC_SMP
 258     /* Spawn video_decoder threads */
 259     /* FIXME: modify the number of vdecs at runtime ?? */
 260     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 261     {
 262         if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
 263         {
 264             return( 1 );
 265         }
 266     }
 267 #else
 268     /* Fake a video_decoder thread */
 269     p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t ));
 270
 271     if( p_vpar->pp_vdec[0] == NULL )
 272     {
 273         return( 1 );
 274     }
 275
 276     p_vpar->pp_vdec[0]->b_die = 0;
 277     p_vpar->pp_vdec[0]->b_error = 0;
 278     p_vpar->pp_vdec[0]->p_vpar = p_vpar;
 279
 280     if( vdec_InitThread( p_vpar->pp_vdec[0] ) )
 281     {
 282         return( 1 );
 283     }
 284
 285 #   if !defined(SYS_BEOS) && !defined(WIN32)
 286 #       if VDEC_NICE
 287     /* Re-nice ourself */
 288     if( nice(VDEC_NICE) == -1 )
 289     {
 290         intf_WarnMsg( 2, "vpar warning : couldn't nice() (%s)",
 291                       strerror(errno) );
 292     }
 293 #       endif
 294 #   endif
 295 #endif
 296
 297     /* Initialize lookup tables */
 298     vpar_InitMbAddrInc( p_vpar );
 299     vpar_InitDCTTables( p_vpar );
 300     vpar_InitPMBType( p_vpar );
 301     vpar_InitBMBType( p_vpar );
 302     vpar_InitDCTTables( p_vpar );
 303     vpar_InitScanTable( p_vpar );
 304
 305     /*
 306      * Initialize the synchro properties
 307      */
 308     vpar_SynchroInit( p_vpar );
 309
 310     /* Mark thread as running and return */
 311     intf_DbgMsg("vpar debug: InitThread(%p) succeeded", p_vpar);
 312     return( 0 );
 313 }
 314
 315 /*****************************************************************************
 316  * RunThread: generic parser thread
 317  *****************************************************************************
 318  * Video parser thread. This function only returns when the thread is
 319  * terminated.
 320  *****************************************************************************/
 321 static void RunThread( vpar_thread_t *p_vpar )
 322 {
 323     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)", p_vpar, getpid());
 324
 325     /*
 326      * Initialize thread
 327      */
 328     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 329
 330     /*
 331      * Main loop - it is not executed if an error occured during
 332      * initialization
 333      */
 334     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 335     {
 336         /* Find the next sequence header in the stream */
 337         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 338
 339         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 340         {
 341 #ifdef STATS
 342             p_vpar->c_loops++;
 343 #endif
 344             /* Parse the next sequence, group or picture header */
 345             if( vpar_ParseHeader( p_vpar ) )
 346             {
 347                 /* End of sequence */
 348                 break;
 349             };
 350         }
 351     }
 352
 353     /*
 354      * Error loop
 355      */
 356     if( p_vpar->p_fifo->b_error )
 357     {
 358         ErrorThread( p_vpar );
 359     }
 360
 361     /* End of thread */
 362     EndThread( p_vpar );
 363 }
 364
 365 /*****************************************************************************
 366  * ErrorThread: RunThread() error loop
 367  *****************************************************************************
 368  * This function is called when an error occured during thread main's loop. The
 369  * thread can still receive feed, but must be ready to terminate as soon as
 370  * possible.
 371  *****************************************************************************/
 372 static void ErrorThread( vpar_thread_t *p_vpar )
 373 {
 374     /* We take the lock, because we are going to read/write the start/end
 375      * indexes of the decoder fifo */
 376     vlc_mutex_lock( &p_vpar->p_fifo->data_lock );
 377
 378     /* Wait until a `die' order is sent */
 379     while( !p_vpar->p_fifo->b_die )
 380     {
 381         /* Trash all received PES packets */
 382         while( !DECODER_FIFO_ISEMPTY(*p_vpar->p_fifo) )
 383         {
 384             p_vpar->p_fifo->pf_delete_pes( p_vpar->p_fifo->p_packets_mgt,
 385                                   DECODER_FIFO_START(*p_vpar->p_fifo) );
 386             DECODER_FIFO_INCSTART( *p_vpar->p_fifo );
 387         }
 388
 389         /* Waiting for the input thread to put new PES packets in the fifo */
 390         vlc_cond_wait( &p_vpar->p_fifo->data_wait, &p_vpar->p_fifo->data_lock );
 391     }
 392
 393     /* We can release the lock before leaving */
 394     vlc_mutex_unlock( &p_vpar->p_fifo->data_lock );
 395 }
 396
 397 /*****************************************************************************
 398  * EndThread: thread destruction
 399  *****************************************************************************
 400  * This function is called when the thread ends after a sucessful
 401  * initialization.
 402  *****************************************************************************/
 403 static void EndThread( vpar_thread_t *p_vpar )
 404 {
 405 #ifdef VDEC_SMP
 406     int i_dummy;
 407 #endif
 408
 409     intf_DbgMsg("vpar debug: destroying video parser thread %p", p_vpar);
 410
 411     /* Release used video buffers. */
 412     if( p_vpar->sequence.p_forward != NULL )
 413     {
 414         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_forward );
 415     }
 416     if( p_vpar->sequence.p_backward != NULL )
 417     {
 418         vout_DatePicture( p_vpar->p_vout, p_vpar->sequence.p_backward,
 419                           vpar_SynchroDate( p_vpar ) );
 420         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_backward );
 421     }
 422     if( p_vpar->picture.p_picture != NULL )
 423     {
 424         vout_DestroyPicture( p_vpar->p_vout, p_vpar->picture.p_picture );
 425     }
 426
 427 #ifdef STATS
 428     intf_Msg("vpar stats: %d loops among %d sequence(s)",
 429              p_vpar->c_loops, p_vpar->c_sequences);
 430
 431     {
 432         struct tms cpu_usage;
 433         times( &cpu_usage );
 434
 435         intf_Msg("vpar stats: cpu usage (user: %d, system: %d)",
 436                  cpu_usage.tms_utime, cpu_usage.tms_stime);
 437     }
 438
 439     intf_Msg("vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 440              p_vpar->pc_pictures[I_CODING_TYPE]
 441              + p_vpar->pc_pictures[P_CODING_TYPE]
 442              + p_vpar->pc_pictures[B_CODING_TYPE],
 443              p_vpar->pc_pictures[I_CODING_TYPE],
 444              p_vpar->pc_pictures[P_CODING_TYPE],
 445              p_vpar->pc_pictures[B_CODING_TYPE]);
 446     intf_Msg("vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 447              p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 448              + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 449              + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 450              p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 451              p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 452              p_vpar->pc_decoded_pictures[B_CODING_TYPE]);
 453     intf_Msg("vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 454              p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 455              + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 456              + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 457              p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 458              p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 459              p_vpar->pc_malformed_pictures[B_CODING_TYPE]);
 460 #define S   p_vpar->sequence
 461     intf_Msg("vpar info: %s stream (%dx%d), %d.%d pi/s",
 462              S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 463              S.i_width, S.i_height, S.i_frame_rate/1001, S.i_frame_rate % 1001);
 464     intf_Msg("vpar info: %s, %s, matrix_coeff: %d",
 465              S.b_progressive ? "Progressive" : "Non-progressive",
 466              S.i_scalable_mode ? "scalable" : "non-scalable",
 467              S.i_matrix_coefficients);
 468 #endif
 469
 470     /* Dispose of matrices if they have been allocated. */
 471     if( p_vpar->sequence.intra_quant.b_allocated )
 472     {
 473         free( p_vpar->sequence.intra_quant.pi_matrix );
 474     }
 475     if( p_vpar->sequence.nonintra_quant.b_allocated )
 476     {
 477         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 478     }
 479     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 480     {
 481         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 482     }
 483     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 484     {
 485         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 486     }
 487
 488 #ifdef VDEC_SMP
 489     /* Destroy vdec threads */
 490     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 491     {
 492         if( p_vpar->pp_vdec[i_dummy] != NULL )
 493             vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
 494         else
 495             break;
 496     }
 497 #else
 498     free( p_vpar->pp_vdec[0] );
 499 #endif
 500
 501     free( p_vpar->p_config );
 502
 503 #ifdef VDEC_SMP
 504     /* Destroy lock and cond */
 505     vlc_mutex_destroy( &(p_vpar->vbuffer.lock) );
 506     vlc_cond_destroy( &(p_vpar->vfifo.wait) );
 507     vlc_mutex_destroy( &(p_vpar->vfifo.lock) );
 508 #endif
 509
 510     vlc_mutex_destroy( &(p_vpar->synchro.fifo_lock) );
 511
 512     module_Unneed( p_vpar->p_idct_module );
 513     module_Unneed( p_vpar->p_motion_module );
 514
 515     free( p_vpar );
 516
 517     intf_DbgMsg("vpar debug: EndThread(%p)", p_vpar);
 518 }
 519
 520 /*****************************************************************************
 521  * BitstreamCallback: Import parameters from the new data/PES packet
 522  *****************************************************************************
 523  * This function is called by input's NextDataPacket.
 524  *****************************************************************************/
 525 static void BitstreamCallback ( bit_stream_t * p_bit_stream,
 526                                 boolean_t b_new_pes )
 527 {
 528     vpar_thread_t * p_vpar = (vpar_thread_t *)p_bit_stream->p_callback_arg;
 529
 530     if( b_new_pes )
 531     {
 532         p_vpar->sequence.next_pts =
 533             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_pts;
 534         p_vpar->sequence.next_dts =
 535             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_dts;
 536         p_vpar->sequence.i_current_rate =
 537             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_rate;
 538
 539         if( DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->b_discontinuity )
 540         {
 541 #ifdef TRACE_VPAR
 542             intf_DbgMsg( "Discontinuity in BitstreamCallback" );
 543 #endif
 544             /* Escape the current picture and reset the picture predictors. */
 545             p_vpar->sequence.b_expect_discontinuity = 1;
 546             p_vpar->picture.b_error = 1;
 547         }
 548     }
 549
 550     if( p_bit_stream->p_data->b_discard_payload )
 551     {
 552 #ifdef TRACE_VPAR
 553         intf_DbgMsg( "Discard payload in BitstreamCallback" );
 554 #endif
 555         /* 1 packet messed up, trash the slice. */
 556         p_vpar->picture.b_error = 1;
 557     }
 558 }