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 1.81 2001/04/29 14:52:42 stef 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 #include "../video_decoder/vdec_idct.h"
  56
  57 #include "vpar_blocks.h"
  58 #include "../video_decoder/vpar_headers.h"
  59 #include "../video_decoder/vpar_synchro.h"
  60 #include "../video_decoder/video_parser.h"
  61 #include "../video_decoder/video_fifo.h"
  62
  63 #include "main.h"
  64
  65 /*
  66  * Local prototypes
  67  */
  68 static int      InitThread          ( vpar_thread_t *p_vpar );
  69 static void     RunThread           ( vpar_thread_t *p_vpar );
  70 static void     ErrorThread         ( vpar_thread_t *p_vpar );
  71 static void     EndThread           ( vpar_thread_t *p_vpar );
  72 static void     BitstreamCallback   ( bit_stream_t *p_bit_stream,
  73                                       boolean_t b_new_pes );
  74
  75 /*****************************************************************************
  76  * vpar_CreateThread: create a generic parser thread
  77  *****************************************************************************
  78  * This function creates a new video parser thread, and returns a pointer
  79  * to its description. On error, it returns NULL.
  80  *****************************************************************************/
  81 vlc_thread_t vpar_CreateThread( vdec_config_t * p_config )
  82 {
  83     vpar_thread_t *     p_vpar;
  84
  85     intf_DbgMsg( "vpar debug: creating video parser thread" );
  86
  87     /* Allocate the memory needed to store the thread's structure */
  88     if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
  89     {
  90         intf_ErrMsg( "vpar error: not enough memory "
  91                      "for vpar_CreateThread() to create the new thread");
  92         return( 0 );
  93     }
  94
  95     /*
  96      * Initialize the thread properties
  97      */
  98     p_vpar->p_fifo = p_config->decoder_config.p_decoder_fifo;
  99     p_vpar->p_config = p_config;
 100
 101     p_vpar->p_vout = p_config->p_vout;
 102
 103     /*
 104      * Choose the best motion compensation module
 105      */
 106     p_vpar->p_motion_module = module_Need( p_main->p_bank,
 107                                            MODULE_CAPABILITY_MOTION, NULL );
 108
 109     if( p_vpar->p_motion_module == NULL )
 110     {
 111         intf_ErrMsg( "vpar error: no suitable motion compensation module" );
 112         free( p_vpar );
 113         return( 0 );
 114     }
 115
 116 #define m ( p_vpar->pppf_motion )
 117 #define s ( p_vpar->ppf_motion_skipped )
 118 #define f ( p_vpar->p_motion_module->p_functions->motion.functions.motion )
 119     m[0][0][0] = m[0][0][1] = m[0][0][2] = m[0][0][3] = NULL;
 120     m[0][1][0] = m[0][1][1] = m[0][1][2] = m[0][1][3] = NULL;
 121     m[1][0][0] = NULL;
 122     m[1][1][0] = NULL;
 123     m[2][0][0] = NULL;
 124     m[2][1][0] = NULL;
 125     m[3][0][0] = NULL;
 126     m[3][1][0] = NULL;
 127
 128     m[1][0][1] = f.pf_field_field_420;
 129     m[1][1][1] = f.pf_frame_field_420;
 130     m[2][0][1] = f.pf_field_field_422;
 131     m[2][1][1] = f.pf_frame_field_422;
 132     m[3][0][1] = f.pf_field_field_444;
 133     m[3][1][1] = f.pf_frame_field_444;
 134
 135     m[1][0][2] = f.pf_field_16x8_420;
 136     m[1][1][2] = f.pf_frame_frame_420;
 137     m[2][0][2] = f.pf_field_16x8_422;
 138     m[2][1][2] = f.pf_frame_frame_422;
 139     m[3][0][2] = f.pf_field_16x8_444;
 140     m[3][1][2] = f.pf_frame_frame_444;
 141
 142     m[1][0][3] = f.pf_field_dmv_420;
 143     m[1][1][3] = f.pf_frame_dmv_420;
 144     m[2][0][3] = f.pf_field_dmv_422;
 145     m[2][1][3] = f.pf_frame_dmv_422;
 146     m[3][0][3] = f.pf_field_dmv_444;
 147     m[3][1][3] = f.pf_frame_dmv_444;
 148
 149     s[0][0] = s[0][1] = s[0][2] = s[0][3] = NULL;
 150     s[1][0] = NULL;
 151     s[2][0] = NULL;
 152     s[3][0] = NULL;
 153
 154     s[1][1] = f.pf_field_field_420;
 155     s[2][1] = f.pf_field_field_422;
 156     s[3][1] = f.pf_field_field_444;
 157
 158     s[1][2] = f.pf_field_field_420;
 159     s[2][2] = f.pf_field_field_422;
 160     s[3][2] = f.pf_field_field_444;
 161
 162     s[1][3] = f.pf_frame_frame_420;
 163     s[2][3] = f.pf_frame_frame_422;
 164     s[3][3] = f.pf_frame_frame_444;
 165 #undef f
 166 #undef s
 167 #undef m
 168
 169      /*
 170       * Choose the best IDCT module
 171       */
 172     p_vpar->p_idct_module = module_Need( p_main->p_bank,
 173                                          MODULE_CAPABILITY_IDCT, NULL );
 174
 175     if( p_vpar->p_idct_module == NULL )
 176     {
 177         intf_ErrMsg( "vpar error: no suitable IDCT module" );
 178         module_Unneed( p_main->p_bank, p_vpar->p_motion_module );
 179         free( p_vpar );
 180         return( 0 );
 181     }
 182
 183 #define f p_vpar->p_idct_module->p_functions->idct.functions.idct
 184     p_vpar->pf_init         = f.pf_init;
 185     p_vpar->pf_sparse_idct  = f.pf_sparse_idct;
 186     p_vpar->pf_idct         = f.pf_idct;
 187     p_vpar->pf_norm_scan    = f.pf_norm_scan;
 188 #undef f
 189
 190     /* Spawn the video parser thread */
 191     if ( vlc_thread_create( &p_vpar->thread_id, "video parser",
 192                             (vlc_thread_func_t)RunThread, (void *)p_vpar ) )
 193     {
 194         intf_ErrMsg("vpar error: can't spawn video parser thread");
 195         module_Unneed( p_main->p_bank, p_vpar->p_idct_module );
 196         module_Unneed( p_main->p_bank, p_vpar->p_motion_module );
 197         free( p_vpar );
 198         return( 0 );
 199     }
 200
 201     intf_DbgMsg("vpar debug: video parser thread (%p) created", p_vpar);
 202     return( p_vpar->thread_id );
 203 }
 204
 205 /* following functions are local */
 206
 207 /*****************************************************************************
 208  * InitThread: initialize vpar output thread
 209  *****************************************************************************
 210  * This function is called from RunThread and performs the second step of the
 211  * initialization. It returns 0 on success. Note that the thread's flag are not
 212  * modified inside this function.
 213  *****************************************************************************/
 214 static int InitThread( vpar_thread_t *p_vpar )
 215 {
 216 #ifdef VDEC_SMP
 217     int i_dummy;
 218 #endif
 219
 220     intf_DbgMsg("vpar debug: initializing video parser thread %p", p_vpar);
 221
 222     p_vpar->p_config->decoder_config.pf_init_bit_stream( &p_vpar->bit_stream,
 223         p_vpar->p_config->decoder_config.p_decoder_fifo, BitstreamCallback,
 224         (void *)p_vpar );
 225
 226     /* Initialize parsing data */
 227     p_vpar->sequence.p_forward = NULL;
 228     p_vpar->sequence.p_backward = NULL;
 229     p_vpar->sequence.intra_quant.b_allocated = 0;
 230     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 231     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 232     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 233     p_vpar->sequence.i_matrix_coefficients = 1;
 234     p_vpar->sequence.next_pts = p_vpar->sequence.next_dts = 0;
 235     p_vpar->sequence.b_expect_discontinuity = 0;
 236
 237     /* Initialize copyright information */
 238     p_vpar->sequence.b_copyright_flag = 0;
 239     p_vpar->sequence.b_original = 0;
 240     p_vpar->sequence.i_copyright_id = 0;
 241     p_vpar->sequence.i_copyright_nb = 0;
 242
 243     p_vpar->picture.p_picture = NULL;
 244     p_vpar->picture.i_current_structure = 0;
 245
 246     /* Initialize other properties */
 247 #ifdef STATS
 248     p_vpar->c_loops = 0;
 249     p_vpar->c_sequences = 0;
 250     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 251     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 252     memset(p_vpar->pc_malformed_pictures, 0,
 253            sizeof(p_vpar->pc_malformed_pictures));
 254 #endif
 255
 256     /* Initialize video FIFO */
 257     vpar_InitFIFO( p_vpar );
 258
 259     memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
 260
 261 #ifdef VDEC_SMP
 262     /* Spawn video_decoder threads */
 263     /* FIXME: modify the number of vdecs at runtime ?? */
 264     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 265     {
 266         if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
 267         {
 268             return( 1 );
 269         }
 270     }
 271 #else
 272     /* Fake a video_decoder thread */
 273     if( (p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t )))
 274          == NULL || vdec_InitThread( p_vpar->pp_vdec[0] ) )
 275     {
 276         return( 1 );
 277     }
 278     p_vpar->pp_vdec[0]->b_die = 0;
 279     p_vpar->pp_vdec[0]->b_error = 0;
 280     p_vpar->pp_vdec[0]->p_vpar = p_vpar;
 281
 282 #   if !defined(SYS_BEOS) && !defined(WIN32)
 283 #       if VDEC_NICE
 284     /* Re-nice ourself */
 285     if( nice(VDEC_NICE) == -1 )
 286     {
 287         intf_WarnMsg( 2, "vpar warning : couldn't nice() (%s)",
 288                       strerror(errno) );
 289     }
 290 #       endif
 291 #   endif
 292 #endif
 293
 294     /* Initialize lookup tables */
 295     vpar_InitMbAddrInc( p_vpar );
 296     vpar_InitDCTTables( p_vpar );
 297     vpar_InitPMBType( p_vpar );
 298     vpar_InitBMBType( p_vpar );
 299     vpar_InitDCTTables( p_vpar );
 300     vpar_InitScanTable( p_vpar );
 301
 302     /*
 303      * Initialize the synchro properties
 304      */
 305     vpar_SynchroInit( p_vpar );
 306
 307     /* Mark thread as running and return */
 308     intf_DbgMsg("vpar debug: InitThread(%p) succeeded", p_vpar);
 309     return( 0 );
 310 }
 311
 312 /*****************************************************************************
 313  * RunThread: generic parser thread
 314  *****************************************************************************
 315  * Video parser thread. This function only returns when the thread is
 316  * terminated.
 317  *****************************************************************************/
 318 static void RunThread( vpar_thread_t *p_vpar )
 319 {
 320     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)", p_vpar, getpid());
 321
 322     /*
 323      * Initialize thread
 324      */
 325     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 326
 327     /*
 328      * Main loop - it is not executed if an error occured during
 329      * initialization
 330      */
 331     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 332     {
 333         /* Find the next sequence header in the stream */
 334         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 335
 336         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 337         {
 338 #ifdef STATS
 339             p_vpar->c_loops++;
 340 #endif
 341             /* Parse the next sequence, group or picture header */
 342             if( vpar_ParseHeader( p_vpar ) )
 343             {
 344                 /* End of sequence */
 345                 break;
 346             };
 347         }
 348     }
 349
 350     /*
 351      * Error loop
 352      */
 353     if( p_vpar->p_fifo->b_error )
 354     {
 355         ErrorThread( p_vpar );
 356     }
 357
 358     /* End of thread */
 359     EndThread( p_vpar );
 360 }
 361
 362 /*****************************************************************************
 363  * ErrorThread: RunThread() error loop
 364  *****************************************************************************
 365  * This function is called when an error occured during thread main's loop. The
 366  * thread can still receive feed, but must be ready to terminate as soon as
 367  * possible.
 368  *****************************************************************************/
 369 static void ErrorThread( vpar_thread_t *p_vpar )
 370 {
 371     /* We take the lock, because we are going to read/write the start/end
 372      * indexes of the decoder fifo */
 373     vlc_mutex_lock( &p_vpar->p_fifo->data_lock );
 374
 375     /* Wait until a `die' order is sent */
 376     while( !p_vpar->p_fifo->b_die )
 377     {
 378         /* Trash all received PES packets */
 379         while( !DECODER_FIFO_ISEMPTY(*p_vpar->p_fifo) )
 380         {
 381             p_vpar->p_fifo->pf_delete_pes( p_vpar->p_fifo->p_packets_mgt,
 382                                   DECODER_FIFO_START(*p_vpar->p_fifo) );
 383             DECODER_FIFO_INCSTART( *p_vpar->p_fifo );
 384         }
 385
 386         /* Waiting for the input thread to put new PES packets in the fifo */
 387         vlc_cond_wait( &p_vpar->p_fifo->data_wait, &p_vpar->p_fifo->data_lock );
 388     }
 389
 390     /* We can release the lock before leaving */
 391     vlc_mutex_unlock( &p_vpar->p_fifo->data_lock );
 392 }
 393
 394 /*****************************************************************************
 395  * EndThread: thread destruction
 396  *****************************************************************************
 397  * This function is called when the thread ends after a sucessful
 398  * initialization.
 399  *****************************************************************************/
 400 static void EndThread( vpar_thread_t *p_vpar )
 401 {
 402 #ifdef VDEC_SMP
 403     int i_dummy;
 404 #endif
 405
 406     intf_DbgMsg("vpar debug: destroying video parser thread %p", p_vpar);
 407
 408     /* Release used video buffers. */
 409     if( p_vpar->sequence.p_forward != NULL )
 410     {
 411         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_forward );
 412     }
 413     if( p_vpar->sequence.p_backward != NULL )
 414     {
 415         vout_DatePicture( p_vpar->p_vout, p_vpar->sequence.p_backward,
 416                           vpar_SynchroDate( p_vpar ) );
 417         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_backward );
 418     }
 419     if( p_vpar->picture.p_picture != NULL )
 420     {
 421         vout_DestroyPicture( p_vpar->p_vout, p_vpar->picture.p_picture );
 422     }
 423
 424 #ifdef STATS
 425     intf_Msg("vpar stats: %d loops among %d sequence(s)",
 426              p_vpar->c_loops, p_vpar->c_sequences);
 427
 428     {
 429         struct tms cpu_usage;
 430         times( &cpu_usage );
 431
 432         intf_Msg("vpar stats: cpu usage (user: %d, system: %d)",
 433                  cpu_usage.tms_utime, cpu_usage.tms_stime);
 434     }
 435
 436     intf_Msg("vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 437              p_vpar->pc_pictures[I_CODING_TYPE]
 438              + p_vpar->pc_pictures[P_CODING_TYPE]
 439              + p_vpar->pc_pictures[B_CODING_TYPE],
 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     intf_Msg("vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 444              p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 445              + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 446              + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 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     intf_Msg("vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 451              p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 452              + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 453              + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 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 #define S   p_vpar->sequence
 458     intf_Msg("vpar info: %s stream (%dx%d), %d.%d pi/s",
 459              S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 460              S.i_width, S.i_height, S.i_frame_rate/1001, S.i_frame_rate % 1001);
 461     intf_Msg("vpar info: %s, %s, matrix_coeff: %d",
 462              S.b_progressive ? "Progressive" : "Non-progressive",
 463              S.i_scalable_mode ? "scalable" : "non-scalable",
 464              S.i_matrix_coefficients);
 465 #endif
 466
 467     /* Dispose of matrices if they have been allocated. */
 468     if( p_vpar->sequence.intra_quant.b_allocated )
 469     {
 470         free( p_vpar->sequence.intra_quant.pi_matrix );
 471     }
 472     if( p_vpar->sequence.nonintra_quant.b_allocated )
 473     {
 474         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 475     }
 476     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 477     {
 478         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 479     }
 480     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 481     {
 482         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 483     }
 484
 485 #ifdef VDEC_SMP
 486     /* Destroy vdec threads */
 487     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 488     {
 489         if( p_vpar->pp_vdec[i_dummy] != NULL )
 490             vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
 491         else
 492             break;
 493     }
 494 #else
 495     free( p_vpar->pp_vdec[0] );
 496 #endif
 497
 498     free( p_vpar->p_config );
 499
 500 #ifdef VDEC_SMP
 501     /* Destroy lock and cond */
 502     vlc_mutex_destroy( &(p_vpar->vbuffer.lock) );
 503     vlc_cond_destroy( &(p_vpar->vfifo.wait) );
 504     vlc_mutex_destroy( &(p_vpar->vfifo.lock) );
 505 #endif
 506
 507     vlc_mutex_destroy( &(p_vpar->synchro.fifo_lock) );
 508
 509     module_Unneed( p_main->p_bank, p_vpar->p_idct_module );
 510     module_Unneed( p_main->p_bank, p_vpar->p_motion_module );
 511
 512     free( p_vpar );
 513
 514     intf_DbgMsg("vpar debug: EndThread(%p)", p_vpar);
 515 }
 516
 517 /*****************************************************************************
 518  * BitstreamCallback: Import parameters from the new data/PES packet
 519  *****************************************************************************
 520  * This function is called by input's NextDataPacket.
 521  *****************************************************************************/
 522 static void BitstreamCallback ( bit_stream_t * p_bit_stream,
 523                                 boolean_t b_new_pes )
 524 {
 525     vpar_thread_t * p_vpar = (vpar_thread_t *)p_bit_stream->p_callback_arg;
 526
 527     if( b_new_pes )
 528     {
 529         p_vpar->sequence.next_pts =
 530             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_pts;
 531         p_vpar->sequence.next_dts =
 532             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_dts;
 533         p_vpar->sequence.i_current_rate =
 534             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_rate;
 535
 536         if( DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->b_discontinuity )
 537         {
 538 #ifdef TRACE_VPAR
 539             intf_DbgMsg( "Discontinuity in BitstreamCallback" );
 540 #endif
 541             /* Escape the current picture and reset the picture predictors. */
 542             p_vpar->sequence.b_expect_discontinuity = 1;
 543             p_vpar->picture.b_error = 1;
 544         }
 545     }
 546
 547     if( p_bit_stream->p_data->b_discard_payload )
 548     {
 549 #ifdef TRACE_VPAR
 550         intf_DbgMsg( "Discard payload in BitstreamCallback" );
 551 #endif
 552         /* 1 packet messed up, trash the slice. */
 553         p_vpar->picture.b_error = 1;
 554     }
 555 }