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 1.75 2001/02/18 03:32:02 polux 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 );
 224     p_vpar->bit_stream.pf_bitstream_callback = BitstreamCallback;
 225     p_vpar->bit_stream.p_callback_arg = (void *)p_vpar;
 226
 227     /* InitBitstream has normally begun to read a PES packet, get its
 228      * PTS/DTS */
 229     if( !p_vpar->p_fifo->b_die )
 230     {
 231         BitstreamCallback( &p_vpar->bit_stream, 1 );
 232     }
 233
 234     /* Initialize parsing data */
 235     p_vpar->sequence.p_forward = NULL;
 236     p_vpar->sequence.p_backward = NULL;
 237     p_vpar->sequence.intra_quant.b_allocated = 0;
 238     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 239     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 240     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 241     p_vpar->sequence.i_matrix_coefficients = 1;
 242     p_vpar->sequence.next_pts = p_vpar->sequence.next_dts = 0;
 243     p_vpar->sequence.b_expect_discontinuity = 0;
 244
 245     /* Initialize copyright information */
 246     p_vpar->sequence.b_copyright_flag = 0;
 247     p_vpar->sequence.b_original = 0;
 248     p_vpar->sequence.i_copyright_id = 0;
 249     p_vpar->sequence.i_copyright_nb = 0;
 250
 251     p_vpar->picture.p_picture = NULL;
 252     p_vpar->picture.i_current_structure = 0;
 253
 254     /* Initialize other properties */
 255 #ifdef STATS
 256     p_vpar->c_loops = 0;
 257     p_vpar->c_sequences = 0;
 258     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 259     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 260     memset(p_vpar->pc_malformed_pictures, 0,
 261            sizeof(p_vpar->pc_malformed_pictures));
 262 #endif
 263
 264     /* Initialize video FIFO */
 265     vpar_InitFIFO( p_vpar );
 266
 267     memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
 268
 269 #ifdef VDEC_SMP
 270     /* Spawn video_decoder threads */
 271     /* FIXME: modify the number of vdecs at runtime ?? */
 272     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 273     {
 274         if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
 275         {
 276             return( 1 );
 277         }
 278     }
 279 #else
 280     /* Fake a video_decoder thread */
 281     if( (p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t )))
 282          == NULL || vdec_InitThread( p_vpar->pp_vdec[0] ) )
 283     {
 284         return( 1 );
 285     }
 286     p_vpar->pp_vdec[0]->b_die = 0;
 287     p_vpar->pp_vdec[0]->b_error = 0;
 288     p_vpar->pp_vdec[0]->p_vpar = p_vpar;
 289
 290 #   ifndef SYS_BEOS
 291 #       if VDEC_NICE
 292     /* Re-nice ourself */
 293     if( nice(VDEC_NICE) == -1 )
 294     {
 295         intf_WarnMsg( 2, "vpar warning : couldn't nice() (%s)",
 296                       strerror(errno) );
 297     }
 298 #       endif
 299 #   endif
 300 #endif
 301
 302     /* Initialize lookup tables */
 303 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
 304     vpar_InitCrop( p_vpar );
 305 #endif
 306     vpar_InitMbAddrInc( p_vpar );
 307     vpar_InitDCTTables( p_vpar );
 308     vpar_InitPMBType( p_vpar );
 309     vpar_InitBMBType( p_vpar );
 310     vpar_InitDCTTables( p_vpar );
 311     vpar_InitScanTable( p_vpar );
 312
 313     /*
 314      * Initialize the synchro properties
 315      */
 316     vpar_SynchroInit( p_vpar );
 317
 318     /* Mark thread as running and return */
 319     intf_DbgMsg("vpar debug: InitThread(%p) succeeded", p_vpar);
 320     return( 0 );
 321 }
 322
 323 /*****************************************************************************
 324  * RunThread: generic parser thread
 325  *****************************************************************************
 326  * Video parser thread. This function only returns when the thread is
 327  * terminated.
 328  *****************************************************************************/
 329 static void RunThread( vpar_thread_t *p_vpar )
 330 {
 331     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)", p_vpar, getpid());
 332
 333     /*
 334      * Initialize thread
 335      */
 336     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 337
 338     /*
 339      * Main loop - it is not executed if an error occured during
 340      * initialization
 341      */
 342     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 343     {
 344         /* Find the next sequence header in the stream */
 345         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 346
 347         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 348         {
 349 #ifdef STATS
 350             p_vpar->c_loops++;
 351 #endif
 352             /* Parse the next sequence, group or picture header */
 353             if( vpar_ParseHeader( p_vpar ) )
 354             {
 355                 /* End of sequence */
 356                 break;
 357             };
 358         }
 359     }
 360
 361     /*
 362      * Error loop
 363      */
 364     if( p_vpar->p_fifo->b_error )
 365     {
 366         ErrorThread( p_vpar );
 367     }
 368
 369     /* End of thread */
 370     EndThread( p_vpar );
 371 }
 372
 373 /*****************************************************************************
 374  * ErrorThread: RunThread() error loop
 375  *****************************************************************************
 376  * This function is called when an error occured during thread main's loop. The
 377  * thread can still receive feed, but must be ready to terminate as soon as
 378  * possible.
 379  *****************************************************************************/
 380 static void ErrorThread( vpar_thread_t *p_vpar )
 381 {
 382     /* We take the lock, because we are going to read/write the start/end
 383      * indexes of the decoder fifo */
 384     vlc_mutex_lock( &p_vpar->p_fifo->data_lock );
 385
 386     /* Wait until a `die' order is sent */
 387     while( !p_vpar->p_fifo->b_die )
 388     {
 389         /* Trash all received PES packets */
 390         while( !DECODER_FIFO_ISEMPTY(*p_vpar->p_fifo) )
 391         {
 392             p_vpar->p_fifo->pf_delete_pes( p_vpar->p_fifo->p_packets_mgt,
 393                                   DECODER_FIFO_START(*p_vpar->p_fifo) );
 394             DECODER_FIFO_INCSTART( *p_vpar->p_fifo );
 395         }
 396
 397         /* Waiting for the input thread to put new PES packets in the fifo */
 398         vlc_cond_wait( &p_vpar->p_fifo->data_wait, &p_vpar->p_fifo->data_lock );
 399     }
 400
 401     /* We can release the lock before leaving */
 402     vlc_mutex_unlock( &p_vpar->p_fifo->data_lock );
 403 }
 404
 405 /*****************************************************************************
 406  * EndThread: thread destruction
 407  *****************************************************************************
 408  * This function is called when the thread ends after a sucessful
 409  * initialization.
 410  *****************************************************************************/
 411 static void EndThread( vpar_thread_t *p_vpar )
 412 {
 413 #ifdef VDEC_SMP
 414     int i_dummy;
 415 #endif
 416
 417     intf_DbgMsg("vpar debug: destroying video parser thread %p", p_vpar);
 418
 419     /* Release used video buffers. */
 420     if( p_vpar->sequence.p_forward != NULL )
 421     {
 422         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_forward );
 423     }
 424     if( p_vpar->sequence.p_backward != NULL )
 425     {
 426         vout_DatePicture( p_vpar->p_vout, p_vpar->sequence.p_backward,
 427                           vpar_SynchroDate( p_vpar ) );
 428         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_backward );
 429     }
 430
 431 #ifdef STATS
 432     intf_Msg("vpar stats: %d loops among %d sequence(s)",
 433              p_vpar->c_loops, p_vpar->c_sequences);
 434
 435     {
 436         struct tms cpu_usage;
 437         times( &cpu_usage );
 438
 439         intf_Msg("vpar stats: cpu usage (user: %d, system: %d)",
 440                  cpu_usage.tms_utime, cpu_usage.tms_stime);
 441     }
 442
 443     intf_Msg("vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 444              p_vpar->pc_pictures[I_CODING_TYPE]
 445              + p_vpar->pc_pictures[P_CODING_TYPE]
 446              + p_vpar->pc_pictures[B_CODING_TYPE],
 447              p_vpar->pc_pictures[I_CODING_TYPE],
 448              p_vpar->pc_pictures[P_CODING_TYPE],
 449              p_vpar->pc_pictures[B_CODING_TYPE]);
 450     intf_Msg("vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 451              p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 452              + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 453              + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 454              p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 455              p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 456              p_vpar->pc_decoded_pictures[B_CODING_TYPE]);
 457     intf_Msg("vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 458              p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 459              + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 460              + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 461              p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 462              p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 463              p_vpar->pc_malformed_pictures[B_CODING_TYPE]);
 464 #define S   p_vpar->sequence
 465     intf_Msg("vpar info: %s stream (%dx%d), %d.%d pi/s",
 466              S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 467              S.i_width, S.i_height, S.i_frame_rate/1001, S.i_frame_rate % 1001);
 468     intf_Msg("vpar info: %s, %s, matrix_coeff: %d",
 469              S.b_progressive ? "Progressive" : "Non-progressive",
 470              S.i_scalable_mode ? "scalable" : "non-scalable",
 471              S.i_matrix_coefficients);
 472 #endif
 473
 474     /* Dispose of matrices if they have been allocated. */
 475     if( p_vpar->sequence.intra_quant.b_allocated )
 476     {
 477         free( p_vpar->sequence.intra_quant.pi_matrix );
 478     }
 479     if( p_vpar->sequence.nonintra_quant.b_allocated )
 480     {
 481         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 482     }
 483     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 484     {
 485         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 486     }
 487     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 488     {
 489         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 490     }
 491
 492 #ifdef VDEC_SMP
 493     /* Destroy vdec threads */
 494     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 495     {
 496         if( p_vpar->pp_vdec[i_dummy] != NULL )
 497             vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
 498         else
 499             break;
 500     }
 501 #else
 502     free( p_vpar->pp_vdec[0] );
 503 #endif
 504
 505     free( p_vpar->p_config );
 506
 507 #ifdef VDEC_SMP
 508     /* Destroy lock and cond */
 509     vlc_mutex_destroy( &(p_vpar->vbuffer.lock) );
 510     vlc_cond_destroy( &(p_vpar->vfifo.wait) );
 511     vlc_mutex_destroy( &(p_vpar->vfifo.lock) );
 512 #endif
 513
 514     vlc_mutex_destroy( &(p_vpar->synchro.fifo_lock) );
 515
 516     module_Unneed( p_main->p_bank, p_vpar->p_idct_module );
 517     module_Unneed( p_main->p_bank, p_vpar->p_motion_module );
 518
 519     free( p_vpar );
 520
 521     intf_DbgMsg("vpar debug: EndThread(%p)", p_vpar);
 522 }
 523
 524 /*****************************************************************************
 525  * BitstreamCallback: Import parameters from the new data/PES packet
 526  *****************************************************************************
 527  * This function is called by input's NextDataPacket.
 528  *****************************************************************************/
 529 static void BitstreamCallback ( bit_stream_t * p_bit_stream,
 530                                 boolean_t b_new_pes )
 531 {
 532     vpar_thread_t * p_vpar = (vpar_thread_t *)p_bit_stream->p_callback_arg;
 533
 534     if( b_new_pes )
 535     {
 536         p_vpar->sequence.next_pts =
 537             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_pts;
 538         p_vpar->sequence.next_dts =
 539             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_dts;
 540         p_vpar->sequence.i_current_rate =
 541             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_rate;
 542
 543         if( DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->b_discontinuity )
 544         {
 545             /* Escape the current picture and reset the picture predictors. */
 546             p_vpar->sequence.b_expect_discontinuity = 1;
 547             p_vpar->picture.b_error = 1;
 548         }
 549     }
 550
 551     if( p_bit_stream->p_data->b_discard_payload )
 552     {
 553         /* 1 packet messed up, trash the slice. */
 554         p_vpar->picture.b_error = 1;
 555     }
 556 }