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 1.83 2001/05/01 12:22:18 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 #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 /*
  64  * Local prototypes
  65  */
  66 static int      InitThread          ( vpar_thread_t * );
  67 static void     RunThread           ( vpar_thread_t * );
  68 static void     ErrorThread         ( vpar_thread_t * );
  69 static void     EndThread           ( vpar_thread_t * );
  70 static void     BitstreamCallback   ( bit_stream_t *, boolean_t );
  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  *****************************************************************************/
  78 vlc_thread_t vpar_CreateThread( vdec_config_t * p_config )
  79 {
  80     vpar_thread_t *     p_vpar;
  81
  82     intf_DbgMsg( "vpar debug: creating video parser thread" );
  83
  84     /* Allocate the memory needed to store the thread's structure */
  85     if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
  86     {
  87         intf_ErrMsg( "vpar error: not enough memory "
  88                      "for vpar_CreateThread() to create the new thread");
  89         return( 0 );
  90     }
  91
  92     /*
  93      * Initialize the thread properties
  94      */
  95     p_vpar->p_fifo = p_config->decoder_config.p_decoder_fifo;
  96     p_vpar->p_config = p_config;
  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_init         = f.pf_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 #undef f
 182
 183     /* Spawn the video parser thread */
 184     if ( vlc_thread_create( &p_vpar->thread_id, "video parser",
 185                             (vlc_thread_func_t)RunThread, (void *)p_vpar ) )
 186     {
 187         intf_ErrMsg("vpar error: can't spawn video parser thread");
 188         module_Unneed( p_vpar->p_idct_module );
 189         module_Unneed( p_vpar->p_motion_module );
 190         free( p_vpar );
 191         return( 0 );
 192     }
 193
 194     intf_DbgMsg("vpar debug: video parser thread (%p) created", p_vpar);
 195     return( p_vpar->thread_id );
 196 }
 197
 198 /* following functions are local */
 199
 200 /*****************************************************************************
 201  * InitThread: initialize vpar output thread
 202  *****************************************************************************
 203  * This function is called from RunThread and performs the second step of the
 204  * initialization. It returns 0 on success. Note that the thread's flag are not
 205  * modified inside this function.
 206  *****************************************************************************/
 207 static int InitThread( vpar_thread_t *p_vpar )
 208 {
 209 #ifdef VDEC_SMP
 210     int i_dummy;
 211 #endif
 212
 213     intf_DbgMsg("vpar debug: initializing video parser thread %p", p_vpar);
 214
 215     p_vpar->p_config->decoder_config.pf_init_bit_stream( &p_vpar->bit_stream,
 216         p_vpar->p_config->decoder_config.p_decoder_fifo, BitstreamCallback,
 217         (void *)p_vpar );
 218
 219     /* Initialize parsing data */
 220     p_vpar->sequence.p_forward = NULL;
 221     p_vpar->sequence.p_backward = NULL;
 222     p_vpar->sequence.intra_quant.b_allocated = 0;
 223     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 224     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 225     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 226     p_vpar->sequence.i_matrix_coefficients = 1;
 227     p_vpar->sequence.next_pts = p_vpar->sequence.next_dts = 0;
 228     p_vpar->sequence.b_expect_discontinuity = 0;
 229
 230     /* Initialize copyright information */
 231     p_vpar->sequence.b_copyright_flag = 0;
 232     p_vpar->sequence.b_original = 0;
 233     p_vpar->sequence.i_copyright_id = 0;
 234     p_vpar->sequence.i_copyright_nb = 0;
 235
 236     p_vpar->picture.p_picture = NULL;
 237     p_vpar->picture.i_current_structure = 0;
 238
 239     /* Initialize other properties */
 240 #ifdef STATS
 241     p_vpar->c_loops = 0;
 242     p_vpar->c_sequences = 0;
 243     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 244     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 245     memset(p_vpar->pc_malformed_pictures, 0,
 246            sizeof(p_vpar->pc_malformed_pictures));
 247 #endif
 248
 249     /* Initialize video FIFO */
 250     vpar_InitFIFO( p_vpar );
 251
 252     memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
 253
 254 #ifdef VDEC_SMP
 255     /* Spawn video_decoder threads */
 256     /* FIXME: modify the number of vdecs at runtime ?? */
 257     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 258     {
 259         if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
 260         {
 261             return( 1 );
 262         }
 263     }
 264 #else
 265     /* Fake a video_decoder thread */
 266     if( (p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t )))
 267          == NULL || vdec_InitThread( p_vpar->pp_vdec[0] ) )
 268     {
 269         return( 1 );
 270     }
 271     p_vpar->pp_vdec[0]->b_die = 0;
 272     p_vpar->pp_vdec[0]->b_error = 0;
 273     p_vpar->pp_vdec[0]->p_vpar = p_vpar;
 274
 275 #   if !defined(SYS_BEOS) && !defined(WIN32)
 276 #       if VDEC_NICE
 277     /* Re-nice ourself */
 278     if( nice(VDEC_NICE) == -1 )
 279     {
 280         intf_WarnMsg( 2, "vpar warning : couldn't nice() (%s)",
 281                       strerror(errno) );
 282     }
 283 #       endif
 284 #   endif
 285 #endif
 286
 287     /* Initialize lookup tables */
 288     vpar_InitMbAddrInc( p_vpar );
 289     vpar_InitDCTTables( p_vpar );
 290     vpar_InitPMBType( p_vpar );
 291     vpar_InitBMBType( p_vpar );
 292     vpar_InitDCTTables( p_vpar );
 293     vpar_InitScanTable( p_vpar );
 294
 295     /*
 296      * Initialize the synchro properties
 297      */
 298     vpar_SynchroInit( p_vpar );
 299
 300     /* Mark thread as running and return */
 301     intf_DbgMsg("vpar debug: InitThread(%p) succeeded", p_vpar);
 302     return( 0 );
 303 }
 304
 305 /*****************************************************************************
 306  * RunThread: generic parser thread
 307  *****************************************************************************
 308  * Video parser thread. This function only returns when the thread is
 309  * terminated.
 310  *****************************************************************************/
 311 static void RunThread( vpar_thread_t *p_vpar )
 312 {
 313     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)", p_vpar, getpid());
 314
 315     /*
 316      * Initialize thread
 317      */
 318     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 319
 320     /*
 321      * Main loop - it is not executed if an error occured during
 322      * initialization
 323      */
 324     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 325     {
 326         /* Find the next sequence header in the stream */
 327         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 328
 329         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 330         {
 331 #ifdef STATS
 332             p_vpar->c_loops++;
 333 #endif
 334             /* Parse the next sequence, group or picture header */
 335             if( vpar_ParseHeader( p_vpar ) )
 336             {
 337                 /* End of sequence */
 338                 break;
 339             };
 340         }
 341     }
 342
 343     /*
 344      * Error loop
 345      */
 346     if( p_vpar->p_fifo->b_error )
 347     {
 348         ErrorThread( p_vpar );
 349     }
 350
 351     /* End of thread */
 352     EndThread( p_vpar );
 353 }
 354
 355 /*****************************************************************************
 356  * ErrorThread: RunThread() error loop
 357  *****************************************************************************
 358  * This function is called when an error occured during thread main's loop. The
 359  * thread can still receive feed, but must be ready to terminate as soon as
 360  * possible.
 361  *****************************************************************************/
 362 static void ErrorThread( vpar_thread_t *p_vpar )
 363 {
 364     /* We take the lock, because we are going to read/write the start/end
 365      * indexes of the decoder fifo */
 366     vlc_mutex_lock( &p_vpar->p_fifo->data_lock );
 367
 368     /* Wait until a `die' order is sent */
 369     while( !p_vpar->p_fifo->b_die )
 370     {
 371         /* Trash all received PES packets */
 372         while( !DECODER_FIFO_ISEMPTY(*p_vpar->p_fifo) )
 373         {
 374             p_vpar->p_fifo->pf_delete_pes( p_vpar->p_fifo->p_packets_mgt,
 375                                   DECODER_FIFO_START(*p_vpar->p_fifo) );
 376             DECODER_FIFO_INCSTART( *p_vpar->p_fifo );
 377         }
 378
 379         /* Waiting for the input thread to put new PES packets in the fifo */
 380         vlc_cond_wait( &p_vpar->p_fifo->data_wait, &p_vpar->p_fifo->data_lock );
 381     }
 382
 383     /* We can release the lock before leaving */
 384     vlc_mutex_unlock( &p_vpar->p_fifo->data_lock );
 385 }
 386
 387 /*****************************************************************************
 388  * EndThread: thread destruction
 389  *****************************************************************************
 390  * This function is called when the thread ends after a sucessful
 391  * initialization.
 392  *****************************************************************************/
 393 static void EndThread( vpar_thread_t *p_vpar )
 394 {
 395 #ifdef VDEC_SMP
 396     int i_dummy;
 397 #endif
 398
 399     intf_DbgMsg("vpar debug: destroying video parser thread %p", p_vpar);
 400
 401     /* Release used video buffers. */
 402     if( p_vpar->sequence.p_forward != NULL )
 403     {
 404         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_forward );
 405     }
 406     if( p_vpar->sequence.p_backward != NULL )
 407     {
 408         vout_DatePicture( p_vpar->p_vout, p_vpar->sequence.p_backward,
 409                           vpar_SynchroDate( p_vpar ) );
 410         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_backward );
 411     }
 412     if( p_vpar->picture.p_picture != NULL )
 413     {
 414         vout_DestroyPicture( p_vpar->p_vout, p_vpar->picture.p_picture );
 415     }
 416
 417 #ifdef STATS
 418     intf_Msg("vpar stats: %d loops among %d sequence(s)",
 419              p_vpar->c_loops, p_vpar->c_sequences);
 420
 421     {
 422         struct tms cpu_usage;
 423         times( &cpu_usage );
 424
 425         intf_Msg("vpar stats: cpu usage (user: %d, system: %d)",
 426                  cpu_usage.tms_utime, cpu_usage.tms_stime);
 427     }
 428
 429     intf_Msg("vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 430              p_vpar->pc_pictures[I_CODING_TYPE]
 431              + p_vpar->pc_pictures[P_CODING_TYPE]
 432              + p_vpar->pc_pictures[B_CODING_TYPE],
 433              p_vpar->pc_pictures[I_CODING_TYPE],
 434              p_vpar->pc_pictures[P_CODING_TYPE],
 435              p_vpar->pc_pictures[B_CODING_TYPE]);
 436     intf_Msg("vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 437              p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 438              + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 439              + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 440              p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 441              p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 442              p_vpar->pc_decoded_pictures[B_CODING_TYPE]);
 443     intf_Msg("vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 444              p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 445              + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 446              + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 447              p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 448              p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 449              p_vpar->pc_malformed_pictures[B_CODING_TYPE]);
 450 #define S   p_vpar->sequence
 451     intf_Msg("vpar info: %s stream (%dx%d), %d.%d pi/s",
 452              S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 453              S.i_width, S.i_height, S.i_frame_rate/1001, S.i_frame_rate % 1001);
 454     intf_Msg("vpar info: %s, %s, matrix_coeff: %d",
 455              S.b_progressive ? "Progressive" : "Non-progressive",
 456              S.i_scalable_mode ? "scalable" : "non-scalable",
 457              S.i_matrix_coefficients);
 458 #endif
 459
 460     /* Dispose of matrices if they have been allocated. */
 461     if( p_vpar->sequence.intra_quant.b_allocated )
 462     {
 463         free( p_vpar->sequence.intra_quant.pi_matrix );
 464     }
 465     if( p_vpar->sequence.nonintra_quant.b_allocated )
 466     {
 467         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 468     }
 469     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 470     {
 471         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 472     }
 473     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 474     {
 475         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 476     }
 477
 478 #ifdef VDEC_SMP
 479     /* Destroy vdec threads */
 480     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 481     {
 482         if( p_vpar->pp_vdec[i_dummy] != NULL )
 483             vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
 484         else
 485             break;
 486     }
 487 #else
 488     free( p_vpar->pp_vdec[0] );
 489 #endif
 490
 491     free( p_vpar->p_config );
 492
 493 #ifdef VDEC_SMP
 494     /* Destroy lock and cond */
 495     vlc_mutex_destroy( &(p_vpar->vbuffer.lock) );
 496     vlc_cond_destroy( &(p_vpar->vfifo.wait) );
 497     vlc_mutex_destroy( &(p_vpar->vfifo.lock) );
 498 #endif
 499
 500     vlc_mutex_destroy( &(p_vpar->synchro.fifo_lock) );
 501
 502     module_Unneed( p_vpar->p_idct_module );
 503     module_Unneed( p_vpar->p_motion_module );
 504
 505     free( p_vpar );
 506
 507     intf_DbgMsg("vpar debug: EndThread(%p)", p_vpar);
 508 }
 509
 510 /*****************************************************************************
 511  * BitstreamCallback: Import parameters from the new data/PES packet
 512  *****************************************************************************
 513  * This function is called by input's NextDataPacket.
 514  *****************************************************************************/
 515 static void BitstreamCallback ( bit_stream_t * p_bit_stream,
 516                                 boolean_t b_new_pes )
 517 {
 518     vpar_thread_t * p_vpar = (vpar_thread_t *)p_bit_stream->p_callback_arg;
 519
 520     if( b_new_pes )
 521     {
 522         p_vpar->sequence.next_pts =
 523             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_pts;
 524         p_vpar->sequence.next_dts =
 525             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_dts;
 526         p_vpar->sequence.i_current_rate =
 527             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_rate;
 528
 529         if( DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->b_discontinuity )
 530         {
 531 #ifdef TRACE_VPAR
 532             intf_DbgMsg( "Discontinuity in BitstreamCallback" );
 533 #endif
 534             /* Escape the current picture and reset the picture predictors. */
 535             p_vpar->sequence.b_expect_discontinuity = 1;
 536             p_vpar->picture.b_error = 1;
 537         }
 538     }
 539
 540     if( p_bit_stream->p_data->b_discard_payload )
 541     {
 542 #ifdef TRACE_VPAR
 543         intf_DbgMsg( "Discard payload in BitstreamCallback" );
 544 #endif
 545         /* 1 packet messed up, trash the slice. */
 546         p_vpar->picture.b_error = 1;
 547     }
 548 }