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 1.82 2001/05/01 04:18:18 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     p_vpar->p_vout = p_config->p_vout;
  99
 100     /*
 101      * Choose the best motion compensation module
 102      */
 103     p_vpar->p_motion_module = module_Need( MODULE_CAPABILITY_MOTION, NULL );
 104
 105     if( p_vpar->p_motion_module == NULL )
 106     {
 107         intf_ErrMsg( "vpar error: no suitable motion compensation module" );
 108         free( p_vpar );
 109         return( 0 );
 110     }
 111
 112 #define M ( p_vpar->pppf_motion )
 113 #define S ( p_vpar->ppf_motion_skipped )
 114 #define F ( p_vpar->p_motion_module->p_functions->motion.functions.motion )
 115     M[0][0][0] = M[0][0][1] = M[0][0][2] = M[0][0][3] = NULL;
 116     M[0][1][0] = M[0][1][1] = M[0][1][2] = M[0][1][3] = NULL;
 117     M[1][0][0] = NULL;
 118     M[1][1][0] = NULL;
 119     M[2][0][0] = NULL;
 120     M[2][1][0] = NULL;
 121     M[3][0][0] = NULL;
 122     M[3][1][0] = NULL;
 123
 124     M[1][0][1] = F.pf_field_field_420;
 125     M[1][1][1] = F.pf_frame_field_420;
 126     M[2][0][1] = F.pf_field_field_422;
 127     M[2][1][1] = F.pf_frame_field_422;
 128     M[3][0][1] = F.pf_field_field_444;
 129     M[3][1][1] = F.pf_frame_field_444;
 130
 131     M[1][0][2] = F.pf_field_16x8_420;
 132     M[1][1][2] = F.pf_frame_frame_420;
 133     M[2][0][2] = F.pf_field_16x8_422;
 134     M[2][1][2] = F.pf_frame_frame_422;
 135     M[3][0][2] = F.pf_field_16x8_444;
 136     M[3][1][2] = F.pf_frame_frame_444;
 137
 138     M[1][0][3] = F.pf_field_dmv_420;
 139     M[1][1][3] = F.pf_frame_dmv_420;
 140     M[2][0][3] = F.pf_field_dmv_422;
 141     M[2][1][3] = F.pf_frame_dmv_422;
 142     M[3][0][3] = F.pf_field_dmv_444;
 143     M[3][1][3] = F.pf_frame_dmv_444;
 144
 145     S[0][0] = S[0][1] = S[0][2] = S[0][3] = NULL;
 146     S[1][0] = NULL;
 147     S[2][0] = NULL;
 148     S[3][0] = NULL;
 149
 150     S[1][1] = F.pf_field_field_420;
 151     S[2][1] = F.pf_field_field_422;
 152     S[3][1] = F.pf_field_field_444;
 153
 154     S[1][2] = F.pf_field_field_420;
 155     S[2][2] = F.pf_field_field_422;
 156     S[3][2] = F.pf_field_field_444;
 157
 158     S[1][3] = F.pf_frame_frame_420;
 159     S[2][3] = F.pf_frame_frame_422;
 160     S[3][3] = F.pf_frame_frame_444;
 161 #undef F
 162 #undef S
 163 #undef M
 164
 165      /*
 166       * Choose the best IDCT module
 167       */
 168     p_vpar->p_idct_module = module_Need( MODULE_CAPABILITY_IDCT, NULL );
 169
 170     if( p_vpar->p_idct_module == NULL )
 171     {
 172         intf_ErrMsg( "vpar error: no suitable IDCT module" );
 173         module_Unneed( p_vpar->p_motion_module );
 174         free( p_vpar );
 175         return( 0 );
 176     }
 177
 178 #define f p_vpar->p_idct_module->p_functions->idct.functions.idct
 179     p_vpar->pf_init         = f.pf_init;
 180     p_vpar->pf_sparse_idct  = f.pf_sparse_idct;
 181     p_vpar->pf_idct         = f.pf_idct;
 182     p_vpar->pf_norm_scan    = f.pf_norm_scan;
 183 #undef f
 184
 185     /* Spawn the video parser thread */
 186     if ( vlc_thread_create( &p_vpar->thread_id, "video parser",
 187                             (vlc_thread_func_t)RunThread, (void *)p_vpar ) )
 188     {
 189         intf_ErrMsg("vpar error: can't spawn video parser thread");
 190         module_Unneed( p_vpar->p_idct_module );
 191         module_Unneed( p_vpar->p_motion_module );
 192         free( p_vpar );
 193         return( 0 );
 194     }
 195
 196     intf_DbgMsg("vpar debug: video parser thread (%p) created", p_vpar);
 197     return( p_vpar->thread_id );
 198 }
 199
 200 /* following functions are local */
 201
 202 /*****************************************************************************
 203  * InitThread: initialize vpar output thread
 204  *****************************************************************************
 205  * This function is called from RunThread and performs the second step of the
 206  * initialization. It returns 0 on success. Note that the thread's flag are not
 207  * modified inside this function.
 208  *****************************************************************************/
 209 static int InitThread( vpar_thread_t *p_vpar )
 210 {
 211 #ifdef VDEC_SMP
 212     int i_dummy;
 213 #endif
 214
 215     intf_DbgMsg("vpar debug: initializing video parser thread %p", p_vpar);
 216
 217     p_vpar->p_config->decoder_config.pf_init_bit_stream( &p_vpar->bit_stream,
 218         p_vpar->p_config->decoder_config.p_decoder_fifo, BitstreamCallback,
 219         (void *)p_vpar );
 220
 221     /* Initialize parsing data */
 222     p_vpar->sequence.p_forward = NULL;
 223     p_vpar->sequence.p_backward = NULL;
 224     p_vpar->sequence.intra_quant.b_allocated = 0;
 225     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 226     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 227     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 228     p_vpar->sequence.i_matrix_coefficients = 1;
 229     p_vpar->sequence.next_pts = p_vpar->sequence.next_dts = 0;
 230     p_vpar->sequence.b_expect_discontinuity = 0;
 231
 232     /* Initialize copyright information */
 233     p_vpar->sequence.b_copyright_flag = 0;
 234     p_vpar->sequence.b_original = 0;
 235     p_vpar->sequence.i_copyright_id = 0;
 236     p_vpar->sequence.i_copyright_nb = 0;
 237
 238     p_vpar->picture.p_picture = NULL;
 239     p_vpar->picture.i_current_structure = 0;
 240
 241     /* Initialize other properties */
 242 #ifdef STATS
 243     p_vpar->c_loops = 0;
 244     p_vpar->c_sequences = 0;
 245     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 246     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 247     memset(p_vpar->pc_malformed_pictures, 0,
 248            sizeof(p_vpar->pc_malformed_pictures));
 249 #endif
 250
 251     /* Initialize video FIFO */
 252     vpar_InitFIFO( p_vpar );
 253
 254     memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
 255
 256 #ifdef VDEC_SMP
 257     /* Spawn video_decoder threads */
 258     /* FIXME: modify the number of vdecs at runtime ?? */
 259     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 260     {
 261         if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
 262         {
 263             return( 1 );
 264         }
 265     }
 266 #else
 267     /* Fake a video_decoder thread */
 268     if( (p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t )))
 269          == NULL || vdec_InitThread( p_vpar->pp_vdec[0] ) )
 270     {
 271         return( 1 );
 272     }
 273     p_vpar->pp_vdec[0]->b_die = 0;
 274     p_vpar->pp_vdec[0]->b_error = 0;
 275     p_vpar->pp_vdec[0]->p_vpar = p_vpar;
 276
 277 #   if !defined(SYS_BEOS) && !defined(WIN32)
 278 #       if VDEC_NICE
 279     /* Re-nice ourself */
 280     if( nice(VDEC_NICE) == -1 )
 281     {
 282         intf_WarnMsg( 2, "vpar warning : couldn't nice() (%s)",
 283                       strerror(errno) );
 284     }
 285 #       endif
 286 #   endif
 287 #endif
 288
 289     /* Initialize lookup tables */
 290     vpar_InitMbAddrInc( p_vpar );
 291     vpar_InitDCTTables( p_vpar );
 292     vpar_InitPMBType( p_vpar );
 293     vpar_InitBMBType( p_vpar );
 294     vpar_InitDCTTables( p_vpar );
 295     vpar_InitScanTable( p_vpar );
 296
 297     /*
 298      * Initialize the synchro properties
 299      */
 300     vpar_SynchroInit( p_vpar );
 301
 302     /* Mark thread as running and return */
 303     intf_DbgMsg("vpar debug: InitThread(%p) succeeded", p_vpar);
 304     return( 0 );
 305 }
 306
 307 /*****************************************************************************
 308  * RunThread: generic parser thread
 309  *****************************************************************************
 310  * Video parser thread. This function only returns when the thread is
 311  * terminated.
 312  *****************************************************************************/
 313 static void RunThread( vpar_thread_t *p_vpar )
 314 {
 315     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)", p_vpar, getpid());
 316
 317     /*
 318      * Initialize thread
 319      */
 320     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 321
 322     /*
 323      * Main loop - it is not executed if an error occured during
 324      * initialization
 325      */
 326     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 327     {
 328         /* Find the next sequence header in the stream */
 329         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 330
 331         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 332         {
 333 #ifdef STATS
 334             p_vpar->c_loops++;
 335 #endif
 336             /* Parse the next sequence, group or picture header */
 337             if( vpar_ParseHeader( p_vpar ) )
 338             {
 339                 /* End of sequence */
 340                 break;
 341             };
 342         }
 343     }
 344
 345     /*
 346      * Error loop
 347      */
 348     if( p_vpar->p_fifo->b_error )
 349     {
 350         ErrorThread( p_vpar );
 351     }
 352
 353     /* End of thread */
 354     EndThread( p_vpar );
 355 }
 356
 357 /*****************************************************************************
 358  * ErrorThread: RunThread() error loop
 359  *****************************************************************************
 360  * This function is called when an error occured during thread main's loop. The
 361  * thread can still receive feed, but must be ready to terminate as soon as
 362  * possible.
 363  *****************************************************************************/
 364 static void ErrorThread( vpar_thread_t *p_vpar )
 365 {
 366     /* We take the lock, because we are going to read/write the start/end
 367      * indexes of the decoder fifo */
 368     vlc_mutex_lock( &p_vpar->p_fifo->data_lock );
 369
 370     /* Wait until a `die' order is sent */
 371     while( !p_vpar->p_fifo->b_die )
 372     {
 373         /* Trash all received PES packets */
 374         while( !DECODER_FIFO_ISEMPTY(*p_vpar->p_fifo) )
 375         {
 376             p_vpar->p_fifo->pf_delete_pes( p_vpar->p_fifo->p_packets_mgt,
 377                                   DECODER_FIFO_START(*p_vpar->p_fifo) );
 378             DECODER_FIFO_INCSTART( *p_vpar->p_fifo );
 379         }
 380
 381         /* Waiting for the input thread to put new PES packets in the fifo */
 382         vlc_cond_wait( &p_vpar->p_fifo->data_wait, &p_vpar->p_fifo->data_lock );
 383     }
 384
 385     /* We can release the lock before leaving */
 386     vlc_mutex_unlock( &p_vpar->p_fifo->data_lock );
 387 }
 388
 389 /*****************************************************************************
 390  * EndThread: thread destruction
 391  *****************************************************************************
 392  * This function is called when the thread ends after a sucessful
 393  * initialization.
 394  *****************************************************************************/
 395 static void EndThread( vpar_thread_t *p_vpar )
 396 {
 397 #ifdef VDEC_SMP
 398     int i_dummy;
 399 #endif
 400
 401     intf_DbgMsg("vpar debug: destroying video parser thread %p", p_vpar);
 402
 403     /* Release used video buffers. */
 404     if( p_vpar->sequence.p_forward != NULL )
 405     {
 406         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_forward );
 407     }
 408     if( p_vpar->sequence.p_backward != NULL )
 409     {
 410         vout_DatePicture( p_vpar->p_vout, p_vpar->sequence.p_backward,
 411                           vpar_SynchroDate( p_vpar ) );
 412         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_backward );
 413     }
 414     if( p_vpar->picture.p_picture != NULL )
 415     {
 416         vout_DestroyPicture( p_vpar->p_vout, p_vpar->picture.p_picture );
 417     }
 418
 419 #ifdef STATS
 420     intf_Msg("vpar stats: %d loops among %d sequence(s)",
 421              p_vpar->c_loops, p_vpar->c_sequences);
 422
 423     {
 424         struct tms cpu_usage;
 425         times( &cpu_usage );
 426
 427         intf_Msg("vpar stats: cpu usage (user: %d, system: %d)",
 428                  cpu_usage.tms_utime, cpu_usage.tms_stime);
 429     }
 430
 431     intf_Msg("vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 432              p_vpar->pc_pictures[I_CODING_TYPE]
 433              + p_vpar->pc_pictures[P_CODING_TYPE]
 434              + p_vpar->pc_pictures[B_CODING_TYPE],
 435              p_vpar->pc_pictures[I_CODING_TYPE],
 436              p_vpar->pc_pictures[P_CODING_TYPE],
 437              p_vpar->pc_pictures[B_CODING_TYPE]);
 438     intf_Msg("vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 439              p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 440              + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 441              + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 442              p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 443              p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 444              p_vpar->pc_decoded_pictures[B_CODING_TYPE]);
 445     intf_Msg("vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 446              p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 447              + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 448              + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 449              p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 450              p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 451              p_vpar->pc_malformed_pictures[B_CODING_TYPE]);
 452 #define S   p_vpar->sequence
 453     intf_Msg("vpar info: %s stream (%dx%d), %d.%d pi/s",
 454              S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 455              S.i_width, S.i_height, S.i_frame_rate/1001, S.i_frame_rate % 1001);
 456     intf_Msg("vpar info: %s, %s, matrix_coeff: %d",
 457              S.b_progressive ? "Progressive" : "Non-progressive",
 458              S.i_scalable_mode ? "scalable" : "non-scalable",
 459              S.i_matrix_coefficients);
 460 #endif
 461
 462     /* Dispose of matrices if they have been allocated. */
 463     if( p_vpar->sequence.intra_quant.b_allocated )
 464     {
 465         free( p_vpar->sequence.intra_quant.pi_matrix );
 466     }
 467     if( p_vpar->sequence.nonintra_quant.b_allocated )
 468     {
 469         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 470     }
 471     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 472     {
 473         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 474     }
 475     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 476     {
 477         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 478     }
 479
 480 #ifdef VDEC_SMP
 481     /* Destroy vdec threads */
 482     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 483     {
 484         if( p_vpar->pp_vdec[i_dummy] != NULL )
 485             vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
 486         else
 487             break;
 488     }
 489 #else
 490     free( p_vpar->pp_vdec[0] );
 491 #endif
 492
 493     free( p_vpar->p_config );
 494
 495 #ifdef VDEC_SMP
 496     /* Destroy lock and cond */
 497     vlc_mutex_destroy( &(p_vpar->vbuffer.lock) );
 498     vlc_cond_destroy( &(p_vpar->vfifo.wait) );
 499     vlc_mutex_destroy( &(p_vpar->vfifo.lock) );
 500 #endif
 501
 502     vlc_mutex_destroy( &(p_vpar->synchro.fifo_lock) );
 503
 504     module_Unneed( p_vpar->p_idct_module );
 505     module_Unneed( p_vpar->p_motion_module );
 506
 507     free( p_vpar );
 508
 509     intf_DbgMsg("vpar debug: EndThread(%p)", p_vpar);
 510 }
 511
 512 /*****************************************************************************
 513  * BitstreamCallback: Import parameters from the new data/PES packet
 514  *****************************************************************************
 515  * This function is called by input's NextDataPacket.
 516  *****************************************************************************/
 517 static void BitstreamCallback ( bit_stream_t * p_bit_stream,
 518                                 boolean_t b_new_pes )
 519 {
 520     vpar_thread_t * p_vpar = (vpar_thread_t *)p_bit_stream->p_callback_arg;
 521
 522     if( b_new_pes )
 523     {
 524         p_vpar->sequence.next_pts =
 525             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_pts;
 526         p_vpar->sequence.next_dts =
 527             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_dts;
 528         p_vpar->sequence.i_current_rate =
 529             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_rate;
 530
 531         if( DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->b_discontinuity )
 532         {
 533 #ifdef TRACE_VPAR
 534             intf_DbgMsg( "Discontinuity in BitstreamCallback" );
 535 #endif
 536             /* Escape the current picture and reset the picture predictors. */
 537             p_vpar->sequence.b_expect_discontinuity = 1;
 538             p_vpar->picture.b_error = 1;
 539         }
 540     }
 541
 542     if( p_bit_stream->p_data->b_discard_payload )
 543     {
 544 #ifdef TRACE_VPAR
 545         intf_DbgMsg( "Discard payload in BitstreamCallback" );
 546 #endif
 547         /* 1 packet messed up, trash the slice. */
 548         p_vpar->picture.b_error = 1;
 549     }
 550 }