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 1.84 2001/05/01 15:12:22 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     p_vpar->p_vout = NULL;
  98
  99     /*
 100      * Choose the best motion compensation module
 101      */
 102     p_vpar->p_motion_module = module_Need( MODULE_CAPABILITY_MOTION, NULL );
 103
 104     if( p_vpar->p_motion_module == NULL )
 105     {
 106         intf_ErrMsg( "vpar error: no suitable motion compensation module" );
 107         free( p_vpar );
 108         return( 0 );
 109     }
 110
 111 #define M ( p_vpar->pppf_motion )
 112 #define S ( p_vpar->ppf_motion_skipped )
 113 #define F ( p_vpar->p_motion_module->p_functions->motion.functions.motion )
 114     M[0][0][0] = M[0][0][1] = M[0][0][2] = M[0][0][3] = NULL;
 115     M[0][1][0] = M[0][1][1] = M[0][1][2] = M[0][1][3] = NULL;
 116     M[1][0][0] = NULL;
 117     M[1][1][0] = NULL;
 118     M[2][0][0] = NULL;
 119     M[2][1][0] = NULL;
 120     M[3][0][0] = NULL;
 121     M[3][1][0] = NULL;
 122
 123     M[1][0][1] = F.pf_field_field_420;
 124     M[1][1][1] = F.pf_frame_field_420;
 125     M[2][0][1] = F.pf_field_field_422;
 126     M[2][1][1] = F.pf_frame_field_422;
 127     M[3][0][1] = F.pf_field_field_444;
 128     M[3][1][1] = F.pf_frame_field_444;
 129
 130     M[1][0][2] = F.pf_field_16x8_420;
 131     M[1][1][2] = F.pf_frame_frame_420;
 132     M[2][0][2] = F.pf_field_16x8_422;
 133     M[2][1][2] = F.pf_frame_frame_422;
 134     M[3][0][2] = F.pf_field_16x8_444;
 135     M[3][1][2] = F.pf_frame_frame_444;
 136
 137     M[1][0][3] = F.pf_field_dmv_420;
 138     M[1][1][3] = F.pf_frame_dmv_420;
 139     M[2][0][3] = F.pf_field_dmv_422;
 140     M[2][1][3] = F.pf_frame_dmv_422;
 141     M[3][0][3] = F.pf_field_dmv_444;
 142     M[3][1][3] = F.pf_frame_dmv_444;
 143
 144     S[0][0] = S[0][1] = S[0][2] = S[0][3] = NULL;
 145     S[1][0] = NULL;
 146     S[2][0] = NULL;
 147     S[3][0] = NULL;
 148
 149     S[1][1] = F.pf_field_field_420;
 150     S[2][1] = F.pf_field_field_422;
 151     S[3][1] = F.pf_field_field_444;
 152
 153     S[1][2] = F.pf_field_field_420;
 154     S[2][2] = F.pf_field_field_422;
 155     S[3][2] = F.pf_field_field_444;
 156
 157     S[1][3] = F.pf_frame_frame_420;
 158     S[2][3] = F.pf_frame_frame_422;
 159     S[3][3] = F.pf_frame_frame_444;
 160 #undef F
 161 #undef S
 162 #undef M
 163
 164      /*
 165       * Choose the best IDCT module
 166       */
 167     p_vpar->p_idct_module = module_Need( MODULE_CAPABILITY_IDCT, NULL );
 168
 169     if( p_vpar->p_idct_module == NULL )
 170     {
 171         intf_ErrMsg( "vpar error: no suitable IDCT module" );
 172         module_Unneed( p_vpar->p_motion_module );
 173         free( p_vpar );
 174         return( 0 );
 175     }
 176
 177 #define f p_vpar->p_idct_module->p_functions->idct.functions.idct
 178     p_vpar->pf_init         = f.pf_init;
 179     p_vpar->pf_sparse_idct  = f.pf_sparse_idct;
 180     p_vpar->pf_idct         = f.pf_idct;
 181     p_vpar->pf_norm_scan    = f.pf_norm_scan;
 182 #undef f
 183
 184     /* Spawn the video parser thread */
 185     if ( vlc_thread_create( &p_vpar->thread_id, "video parser",
 186                             (vlc_thread_func_t)RunThread, (void *)p_vpar ) )
 187     {
 188         intf_ErrMsg("vpar error: can't spawn video parser thread");
 189         module_Unneed( p_vpar->p_idct_module );
 190         module_Unneed( p_vpar->p_motion_module );
 191         free( p_vpar );
 192         return( 0 );
 193     }
 194
 195     intf_DbgMsg("vpar debug: video parser thread (%p) created", p_vpar);
 196     return( p_vpar->thread_id );
 197 }
 198
 199 /* following functions are local */
 200
 201 /*****************************************************************************
 202  * InitThread: initialize vpar output thread
 203  *****************************************************************************
 204  * This function is called from RunThread and performs the second step of the
 205  * initialization. It returns 0 on success. Note that the thread's flag are not
 206  * modified inside this function.
 207  *****************************************************************************/
 208 static int InitThread( vpar_thread_t *p_vpar )
 209 {
 210 #ifdef VDEC_SMP
 211     int i_dummy;
 212 #endif
 213
 214     intf_DbgMsg("vpar debug: initializing video parser thread %p", p_vpar);
 215
 216     p_vpar->p_config->decoder_config.pf_init_bit_stream( &p_vpar->bit_stream,
 217         p_vpar->p_config->decoder_config.p_decoder_fifo, BitstreamCallback,
 218         (void *)p_vpar );
 219
 220     /* Initialize parsing data */
 221     p_vpar->sequence.p_forward = NULL;
 222     p_vpar->sequence.p_backward = NULL;
 223     p_vpar->sequence.intra_quant.b_allocated = 0;
 224     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 225     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 226     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 227     p_vpar->sequence.i_matrix_coefficients = 1;
 228     p_vpar->sequence.next_pts = p_vpar->sequence.next_dts = 0;
 229     p_vpar->sequence.b_expect_discontinuity = 0;
 230
 231     /* Initialize copyright information */
 232     p_vpar->sequence.b_copyright_flag = 0;
 233     p_vpar->sequence.b_original = 0;
 234     p_vpar->sequence.i_copyright_id = 0;
 235     p_vpar->sequence.i_copyright_nb = 0;
 236
 237     p_vpar->picture.p_picture = NULL;
 238     p_vpar->picture.i_current_structure = 0;
 239
 240     /* Initialize other properties */
 241 #ifdef STATS
 242     p_vpar->c_loops = 0;
 243     p_vpar->c_sequences = 0;
 244     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 245     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 246     memset(p_vpar->pc_malformed_pictures, 0,
 247            sizeof(p_vpar->pc_malformed_pictures));
 248 #endif
 249
 250     /* Initialize video FIFO */
 251     vpar_InitFIFO( p_vpar );
 252
 253     memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
 254
 255 #ifdef VDEC_SMP
 256     /* Spawn video_decoder threads */
 257     /* FIXME: modify the number of vdecs at runtime ?? */
 258     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 259     {
 260         if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
 261         {
 262             return( 1 );
 263         }
 264     }
 265 #else
 266     /* Fake a video_decoder thread */
 267     if( (p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t )))
 268          == NULL || vdec_InitThread( p_vpar->pp_vdec[0] ) )
 269     {
 270         return( 1 );
 271     }
 272     p_vpar->pp_vdec[0]->b_die = 0;
 273     p_vpar->pp_vdec[0]->b_error = 0;
 274     p_vpar->pp_vdec[0]->p_vpar = p_vpar;
 275
 276 #   if !defined(SYS_BEOS) && !defined(WIN32)
 277 #       if VDEC_NICE
 278     /* Re-nice ourself */
 279     if( nice(VDEC_NICE) == -1 )
 280     {
 281         intf_WarnMsg( 2, "vpar warning : couldn't nice() (%s)",
 282                       strerror(errno) );
 283     }
 284 #       endif
 285 #   endif
 286 #endif
 287
 288     /* Initialize lookup tables */
 289     vpar_InitMbAddrInc( p_vpar );
 290     vpar_InitDCTTables( p_vpar );
 291     vpar_InitPMBType( p_vpar );
 292     vpar_InitBMBType( p_vpar );
 293     vpar_InitDCTTables( p_vpar );
 294     vpar_InitScanTable( p_vpar );
 295
 296     /*
 297      * Initialize the synchro properties
 298      */
 299     vpar_SynchroInit( p_vpar );
 300
 301     /* Mark thread as running and return */
 302     intf_DbgMsg("vpar debug: InitThread(%p) succeeded", p_vpar);
 303     return( 0 );
 304 }
 305
 306 /*****************************************************************************
 307  * RunThread: generic parser thread
 308  *****************************************************************************
 309  * Video parser thread. This function only returns when the thread is
 310  * terminated.
 311  *****************************************************************************/
 312 static void RunThread( vpar_thread_t *p_vpar )
 313 {
 314     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)", p_vpar, getpid());
 315
 316     /*
 317      * Initialize thread
 318      */
 319     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 320
 321     /*
 322      * Main loop - it is not executed if an error occured during
 323      * initialization
 324      */
 325     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 326     {
 327         /* Find the next sequence header in the stream */
 328         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 329
 330         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 331         {
 332 #ifdef STATS
 333             p_vpar->c_loops++;
 334 #endif
 335             /* Parse the next sequence, group or picture header */
 336             if( vpar_ParseHeader( p_vpar ) )
 337             {
 338                 /* End of sequence */
 339                 break;
 340             };
 341         }
 342     }
 343
 344     /*
 345      * Error loop
 346      */
 347     if( p_vpar->p_fifo->b_error )
 348     {
 349         ErrorThread( p_vpar );
 350     }
 351
 352     /* End of thread */
 353     EndThread( p_vpar );
 354 }
 355
 356 /*****************************************************************************
 357  * ErrorThread: RunThread() error loop
 358  *****************************************************************************
 359  * This function is called when an error occured during thread main's loop. The
 360  * thread can still receive feed, but must be ready to terminate as soon as
 361  * possible.
 362  *****************************************************************************/
 363 static void ErrorThread( vpar_thread_t *p_vpar )
 364 {
 365     /* We take the lock, because we are going to read/write the start/end
 366      * indexes of the decoder fifo */
 367     vlc_mutex_lock( &p_vpar->p_fifo->data_lock );
 368
 369     /* Wait until a `die' order is sent */
 370     while( !p_vpar->p_fifo->b_die )
 371     {
 372         /* Trash all received PES packets */
 373         while( !DECODER_FIFO_ISEMPTY(*p_vpar->p_fifo) )
 374         {
 375             p_vpar->p_fifo->pf_delete_pes( p_vpar->p_fifo->p_packets_mgt,
 376                                   DECODER_FIFO_START(*p_vpar->p_fifo) );
 377             DECODER_FIFO_INCSTART( *p_vpar->p_fifo );
 378         }
 379
 380         /* Waiting for the input thread to put new PES packets in the fifo */
 381         vlc_cond_wait( &p_vpar->p_fifo->data_wait, &p_vpar->p_fifo->data_lock );
 382     }
 383
 384     /* We can release the lock before leaving */
 385     vlc_mutex_unlock( &p_vpar->p_fifo->data_lock );
 386 }
 387
 388 /*****************************************************************************
 389  * EndThread: thread destruction
 390  *****************************************************************************
 391  * This function is called when the thread ends after a sucessful
 392  * initialization.
 393  *****************************************************************************/
 394 static void EndThread( vpar_thread_t *p_vpar )
 395 {
 396 #ifdef VDEC_SMP
 397     int i_dummy;
 398 #endif
 399
 400     intf_DbgMsg("vpar debug: destroying video parser thread %p", p_vpar);
 401
 402     /* Release used video buffers. */
 403     if( p_vpar->sequence.p_forward != NULL )
 404     {
 405         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_forward );
 406     }
 407     if( p_vpar->sequence.p_backward != NULL )
 408     {
 409         vout_DatePicture( p_vpar->p_vout, p_vpar->sequence.p_backward,
 410                           vpar_SynchroDate( p_vpar ) );
 411         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_backward );
 412     }
 413     if( p_vpar->picture.p_picture != NULL )
 414     {
 415         vout_DestroyPicture( p_vpar->p_vout, p_vpar->picture.p_picture );
 416     }
 417
 418 #ifdef STATS
 419     intf_Msg("vpar stats: %d loops among %d sequence(s)",
 420              p_vpar->c_loops, p_vpar->c_sequences);
 421
 422     {
 423         struct tms cpu_usage;
 424         times( &cpu_usage );
 425
 426         intf_Msg("vpar stats: cpu usage (user: %d, system: %d)",
 427                  cpu_usage.tms_utime, cpu_usage.tms_stime);
 428     }
 429
 430     intf_Msg("vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 431              p_vpar->pc_pictures[I_CODING_TYPE]
 432              + p_vpar->pc_pictures[P_CODING_TYPE]
 433              + p_vpar->pc_pictures[B_CODING_TYPE],
 434              p_vpar->pc_pictures[I_CODING_TYPE],
 435              p_vpar->pc_pictures[P_CODING_TYPE],
 436              p_vpar->pc_pictures[B_CODING_TYPE]);
 437     intf_Msg("vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 438              p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 439              + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 440              + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 441              p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 442              p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 443              p_vpar->pc_decoded_pictures[B_CODING_TYPE]);
 444     intf_Msg("vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 445              p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 446              + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 447              + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 448              p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 449              p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 450              p_vpar->pc_malformed_pictures[B_CODING_TYPE]);
 451 #define S   p_vpar->sequence
 452     intf_Msg("vpar info: %s stream (%dx%d), %d.%d pi/s",
 453              S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 454              S.i_width, S.i_height, S.i_frame_rate/1001, S.i_frame_rate % 1001);
 455     intf_Msg("vpar info: %s, %s, matrix_coeff: %d",
 456              S.b_progressive ? "Progressive" : "Non-progressive",
 457              S.i_scalable_mode ? "scalable" : "non-scalable",
 458              S.i_matrix_coefficients);
 459 #endif
 460
 461     /* Dispose of matrices if they have been allocated. */
 462     if( p_vpar->sequence.intra_quant.b_allocated )
 463     {
 464         free( p_vpar->sequence.intra_quant.pi_matrix );
 465     }
 466     if( p_vpar->sequence.nonintra_quant.b_allocated )
 467     {
 468         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 469     }
 470     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 471     {
 472         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 473     }
 474     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 475     {
 476         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 477     }
 478
 479 #ifdef VDEC_SMP
 480     /* Destroy vdec threads */
 481     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 482     {
 483         if( p_vpar->pp_vdec[i_dummy] != NULL )
 484             vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
 485         else
 486             break;
 487     }
 488 #else
 489     free( p_vpar->pp_vdec[0] );
 490 #endif
 491
 492     free( p_vpar->p_config );
 493
 494 #ifdef VDEC_SMP
 495     /* Destroy lock and cond */
 496     vlc_mutex_destroy( &(p_vpar->vbuffer.lock) );
 497     vlc_cond_destroy( &(p_vpar->vfifo.wait) );
 498     vlc_mutex_destroy( &(p_vpar->vfifo.lock) );
 499 #endif
 500
 501     vlc_mutex_destroy( &(p_vpar->synchro.fifo_lock) );
 502
 503     module_Unneed( p_vpar->p_idct_module );
 504     module_Unneed( p_vpar->p_motion_module );
 505
 506     free( p_vpar );
 507
 508     intf_DbgMsg("vpar debug: EndThread(%p)", p_vpar);
 509 }
 510
 511 /*****************************************************************************
 512  * BitstreamCallback: Import parameters from the new data/PES packet
 513  *****************************************************************************
 514  * This function is called by input's NextDataPacket.
 515  *****************************************************************************/
 516 static void BitstreamCallback ( bit_stream_t * p_bit_stream,
 517                                 boolean_t b_new_pes )
 518 {
 519     vpar_thread_t * p_vpar = (vpar_thread_t *)p_bit_stream->p_callback_arg;
 520
 521     if( b_new_pes )
 522     {
 523         p_vpar->sequence.next_pts =
 524             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_pts;
 525         p_vpar->sequence.next_dts =
 526             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_dts;
 527         p_vpar->sequence.i_current_rate =
 528             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_rate;
 529
 530         if( DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->b_discontinuity )
 531         {
 532 #ifdef TRACE_VPAR
 533             intf_DbgMsg( "Discontinuity in BitstreamCallback" );
 534 #endif
 535             /* Escape the current picture and reset the picture predictors. */
 536             p_vpar->sequence.b_expect_discontinuity = 1;
 537             p_vpar->picture.b_error = 1;
 538         }
 539     }
 540
 541     if( p_bit_stream->p_data->b_discard_payload )
 542     {
 543 #ifdef TRACE_VPAR
 544         intf_DbgMsg( "Discard payload in BitstreamCallback" );
 545 #endif
 546         /* 1 packet messed up, trash the slice. */
 547         p_vpar->picture.b_error = 1;
 548     }
 549 }