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 1.71 2001/02/07 15:32:26 massiot 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 "plugins.h"
  44 #include "modules.h"
  45
  46 #include "intf_msg.h"
  47
  48 #include "stream_control.h"
  49 #include "input_ext-dec.h"
  50
  51 #include "video.h"
  52 #include "video_output.h"
  53
  54 #include "video_decoder.h"
  55 #include "vdec_motion.h"
  56 #include "../video_decoder/vdec_idct.h"
  57
  58 #include "vpar_blocks.h"
  59 #include "../video_decoder/vpar_headers.h"
  60 #include "../video_decoder/vpar_synchro.h"
  61 #include "../video_decoder/video_parser.h"
  62 #include "../video_decoder/video_fifo.h"
  63
  64 #include "main.h"
  65
  66 /*
  67  * Local prototypes
  68  */
  69 static int      InitThread          ( vpar_thread_t *p_vpar );
  70 static void     RunThread           ( vpar_thread_t *p_vpar );
  71 static void     ErrorThread         ( vpar_thread_t *p_vpar );
  72 static void     EndThread           ( vpar_thread_t *p_vpar );
  73 static void     BitstreamCallback   ( bit_stream_t *p_bit_stream,
  74                                       boolean_t b_new_pes );
  75
  76 /*****************************************************************************
  77  * vpar_CreateThread: create a generic parser thread
  78  *****************************************************************************
  79  * This function creates a new video parser thread, and returns a pointer
  80  * to its description. On error, it returns NULL.
  81  *****************************************************************************/
  82 vlc_thread_t vpar_CreateThread( vdec_config_t * p_config )
  83 {
  84     vpar_thread_t *     p_vpar;
  85
  86     intf_DbgMsg( "vpar debug: creating video parser thread" );
  87
  88     /* Allocate the memory needed to store the thread's structure */
  89     if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
  90     {
  91         intf_ErrMsg( "vpar error: not enough memory "
  92                      "for vpar_CreateThread() to create the new thread");
  93         return( 0 );
  94     }
  95
  96     /*
  97      * Initialize the thread properties
  98      */
  99     p_vpar->p_fifo = p_config->decoder_config.p_decoder_fifo;
 100     p_vpar->p_config = p_config;
 101
 102     p_vpar->p_vout = p_config->p_vout;
 103
 104     /*
 105      * Choose the best motion compensation module
 106      */
 107     p_vpar->p_motion_module = module_Need( p_main->p_module_bank,
 108                                            MODULE_CAPABILITY_MOTION, NULL );
 109
 110     if( p_vpar->p_motion_module == NULL )
 111     {
 112         intf_ErrMsg( "vpar error: no suitable motion compensation module" );
 113         free( p_vpar );
 114         return( 0 );
 115     }
 116
 117 #define m ( p_vpar->pppf_motion )
 118 #define s ( p_vpar->ppf_motion_skipped )
 119 #define f ( p_vpar->p_motion_module->p_functions->motion.functions.motion )
 120     m[0][0][0] = m[0][0][1] = m[0][0][2] = m[0][0][3] = NULL;
 121     m[0][1][0] = m[0][1][1] = m[0][1][2] = m[0][1][3] = NULL;
 122     m[1][0][0] = NULL;
 123     m[1][1][0] = NULL;
 124     m[2][0][0] = NULL;
 125     m[2][1][0] = NULL;
 126     m[3][0][0] = NULL;
 127     m[3][1][0] = NULL;
 128
 129     m[1][0][1] = f.pf_field_field_420;
 130     m[1][1][1] = f.pf_frame_field_420;
 131     m[2][0][1] = f.pf_field_field_422;
 132     m[2][1][1] = f.pf_frame_field_422;
 133     m[3][0][1] = f.pf_field_field_444;
 134     m[3][1][1] = f.pf_frame_field_444;
 135
 136     m[1][0][2] = f.pf_field_16x8_420;
 137     m[1][1][2] = f.pf_frame_frame_420;
 138     m[2][0][2] = f.pf_field_16x8_422;
 139     m[2][1][2] = f.pf_frame_frame_422;
 140     m[3][0][2] = f.pf_field_16x8_444;
 141     m[3][1][2] = f.pf_frame_frame_444;
 142
 143     m[1][0][3] = f.pf_field_dmv_420;
 144     m[1][1][3] = f.pf_frame_dmv_420;
 145     m[2][0][3] = f.pf_field_dmv_422;
 146     m[2][1][3] = f.pf_frame_dmv_422;
 147     m[3][0][3] = f.pf_field_dmv_444;
 148     m[3][1][3] = f.pf_frame_dmv_444;
 149
 150     s[0][0] = s[0][1] = s[0][2] = s[0][3] = NULL;
 151     s[1][0] = NULL;
 152     s[2][0] = NULL;
 153     s[3][0] = NULL;
 154
 155     s[1][1] = f.pf_field_field_420;
 156     s[2][1] = f.pf_field_field_422;
 157     s[3][1] = f.pf_field_field_444;
 158
 159     s[1][2] = f.pf_field_field_420;
 160     s[2][2] = f.pf_field_field_422;
 161     s[3][2] = f.pf_field_field_444;
 162
 163     s[1][3] = f.pf_frame_frame_420;
 164     s[2][3] = f.pf_frame_frame_422;
 165     s[3][3] = f.pf_frame_frame_444;
 166 #undef f
 167 #undef s
 168 #undef m
 169
 170      /*
 171       * Choose the best IDCT module
 172       */
 173     p_vpar->p_idct_module = module_Need( p_main->p_module_bank,
 174                                          MODULE_CAPABILITY_IDCT, NULL );
 175
 176     if( p_vpar->p_idct_module == NULL )
 177     {
 178         intf_ErrMsg( "vpar error: no suitable IDCT module" );
 179         module_Unneed( p_main->p_module_bank, p_vpar->p_motion_module );
 180         free( p_vpar );
 181         return( 0 );
 182     }
 183
 184 #define f p_vpar->p_idct_module->p_functions->idct.functions.idct
 185     p_vpar->pf_init         = f.pf_init;
 186     p_vpar->pf_sparse_idct  = f.pf_sparse_idct;
 187     p_vpar->pf_idct         = f.pf_idct;
 188     p_vpar->pf_norm_scan    = f.pf_norm_scan;
 189 #undef f
 190
 191     /* Spawn the video parser thread */
 192     if ( vlc_thread_create( &p_vpar->thread_id, "video parser",
 193                             (vlc_thread_func_t)RunThread, (void *)p_vpar ) )
 194     {
 195         intf_ErrMsg("vpar error: can't spawn video parser thread");
 196         module_Unneed( p_main->p_module_bank, p_vpar->p_idct_module );
 197         module_Unneed( p_main->p_module_bank, p_vpar->p_motion_module );
 198         free( p_vpar );
 199         return( 0 );
 200     }
 201
 202     intf_DbgMsg("vpar debug: video parser thread (%p) created", p_vpar);
 203     return( p_vpar->thread_id );
 204 }
 205
 206 /* following functions are local */
 207
 208 /*****************************************************************************
 209  * InitThread: initialize vpar output thread
 210  *****************************************************************************
 211  * This function is called from RunThread and performs the second step of the
 212  * initialization. It returns 0 on success. Note that the thread's flag are not
 213  * modified inside this function.
 214  *****************************************************************************/
 215 static int InitThread( vpar_thread_t *p_vpar )
 216 {
 217 #ifdef VDEC_SMP
 218     int i_dummy;
 219 #endif
 220
 221     intf_DbgMsg("vpar debug: initializing video parser thread %p", p_vpar);
 222
 223     p_vpar->p_config->decoder_config.pf_init_bit_stream( &p_vpar->bit_stream,
 224         p_vpar->p_config->decoder_config.p_decoder_fifo );
 225     p_vpar->bit_stream.pf_bitstream_callback = BitstreamCallback;
 226     p_vpar->bit_stream.p_callback_arg = (void *)p_vpar;
 227
 228     /* InitBitstream has normally begun to read a PES packet, get its
 229      * PTS/DTS */
 230     if( !p_vpar->p_fifo->b_die )
 231     {
 232         BitstreamCallback( &p_vpar->bit_stream, 1 );
 233     }
 234
 235     /* Initialize parsing data */
 236     p_vpar->sequence.p_forward = NULL;
 237     p_vpar->sequence.p_backward = NULL;
 238     p_vpar->sequence.intra_quant.b_allocated = 0;
 239     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 240     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 241     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 242     p_vpar->sequence.i_matrix_coefficients = 1;
 243     p_vpar->sequence.next_pts = p_vpar->sequence.next_dts = 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 #   if VDEC_NICE
 291     /* Re-nice ourself */
 292     if( nice(VDEC_NICE) == -1 )
 293     {
 294         intf_WarnMsg( 2, "vpar warning : couldn't nice() (%s)",
 295                       strerror(errno) );
 296     }
 297 #   endif
 298 #endif
 299
 300     /* Initialize lookup tables */
 301 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
 302     vpar_InitCrop( p_vpar );
 303 #endif
 304     vpar_InitMbAddrInc( p_vpar );
 305     vpar_InitDCTTables( p_vpar );
 306     vpar_InitPMBType( p_vpar );
 307     vpar_InitBMBType( p_vpar );
 308     vpar_InitDCTTables( p_vpar );
 309     vpar_InitScanTable( p_vpar );
 310
 311     /*
 312      * Initialize the synchro properties
 313      */
 314     vpar_SynchroInit( p_vpar );
 315
 316     /* Mark thread as running and return */
 317     intf_DbgMsg("vpar debug: InitThread(%p) succeeded", p_vpar);
 318     return( 0 );
 319 }
 320
 321 /*****************************************************************************
 322  * RunThread: generic parser thread
 323  *****************************************************************************
 324  * Video parser thread. This function only returns when the thread is
 325  * terminated.
 326  *****************************************************************************/
 327 static void RunThread( vpar_thread_t *p_vpar )
 328 {
 329     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)", p_vpar, getpid());
 330
 331     /*
 332      * Initialize thread
 333      */
 334     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 335
 336     /*
 337      * Main loop - it is not executed if an error occured during
 338      * initialization
 339      */
 340     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 341     {
 342         /* Find the next sequence header in the stream */
 343         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 344
 345         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 346         {
 347 #ifdef STATS
 348             p_vpar->c_loops++;
 349 #endif
 350             /* Parse the next sequence, group or picture header */
 351             if( vpar_ParseHeader( p_vpar ) )
 352             {
 353                 /* End of sequence */
 354                 break;
 355             };
 356         }
 357     }
 358
 359     /*
 360      * Error loop
 361      */
 362     if( p_vpar->p_fifo->b_error )
 363     {
 364         ErrorThread( p_vpar );
 365     }
 366
 367     /* End of thread */
 368     EndThread( p_vpar );
 369 }
 370
 371 /*****************************************************************************
 372  * ErrorThread: RunThread() error loop
 373  *****************************************************************************
 374  * This function is called when an error occured during thread main's loop. The
 375  * thread can still receive feed, but must be ready to terminate as soon as
 376  * possible.
 377  *****************************************************************************/
 378 static void ErrorThread( vpar_thread_t *p_vpar )
 379 {
 380     /* We take the lock, because we are going to read/write the start/end
 381      * indexes of the decoder fifo */
 382     vlc_mutex_lock( &p_vpar->p_fifo->data_lock );
 383
 384     /* Wait until a `die' order is sent */
 385     while( !p_vpar->p_fifo->b_die )
 386     {
 387         /* Trash all received PES packets */
 388         while( !DECODER_FIFO_ISEMPTY(*p_vpar->p_fifo) )
 389         {
 390             p_vpar->p_fifo->pf_delete_pes( p_vpar->p_fifo->p_packets_mgt,
 391                                   DECODER_FIFO_START(*p_vpar->p_fifo) );
 392             DECODER_FIFO_INCSTART( *p_vpar->p_fifo );
 393         }
 394
 395         /* Waiting for the input thread to put new PES packets in the fifo */
 396         vlc_cond_wait( &p_vpar->p_fifo->data_wait, &p_vpar->p_fifo->data_lock );
 397     }
 398
 399     /* We can release the lock before leaving */
 400     vlc_mutex_unlock( &p_vpar->p_fifo->data_lock );
 401 }
 402
 403 /*****************************************************************************
 404  * EndThread: thread destruction
 405  *****************************************************************************
 406  * This function is called when the thread ends after a sucessful
 407  * initialization.
 408  *****************************************************************************/
 409 static void EndThread( vpar_thread_t *p_vpar )
 410 {
 411 #ifdef VDEC_SMP
 412     int i_dummy;
 413 #endif
 414
 415     intf_DbgMsg("vpar debug: destroying video parser thread %p", p_vpar);
 416
 417     /* Release used video buffers. */
 418     if( p_vpar->sequence.p_forward != NULL )
 419     {
 420         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_forward );
 421     }
 422     if( p_vpar->sequence.p_backward != NULL )
 423     {
 424         vout_DatePicture( p_vpar->p_vout, p_vpar->sequence.p_backward,
 425                           vpar_SynchroDate( p_vpar ) );
 426         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_backward );
 427     }
 428
 429 #ifdef STATS
 430     intf_Msg("vpar stats: %d loops among %d sequence(s)",
 431              p_vpar->c_loops, p_vpar->c_sequences);
 432
 433     {
 434         struct tms cpu_usage;
 435         times( &cpu_usage );
 436
 437         intf_Msg("vpar stats: cpu usage (user: %d, system: %d)",
 438                  cpu_usage.tms_utime, cpu_usage.tms_stime);
 439     }
 440
 441     intf_Msg("vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 442              p_vpar->pc_pictures[I_CODING_TYPE]
 443              + p_vpar->pc_pictures[P_CODING_TYPE]
 444              + p_vpar->pc_pictures[B_CODING_TYPE],
 445              p_vpar->pc_pictures[I_CODING_TYPE],
 446              p_vpar->pc_pictures[P_CODING_TYPE],
 447              p_vpar->pc_pictures[B_CODING_TYPE]);
 448     intf_Msg("vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 449              p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 450              + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 451              + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 452              p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 453              p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 454              p_vpar->pc_decoded_pictures[B_CODING_TYPE]);
 455     intf_Msg("vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 456              p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 457              + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 458              + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 459              p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 460              p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 461              p_vpar->pc_malformed_pictures[B_CODING_TYPE]);
 462 #define S   p_vpar->sequence
 463     intf_Msg("vpar info: %s stream (%dx%d), %d.%d pi/s",
 464              S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 465              S.i_width, S.i_height, S.i_frame_rate/1001, S.i_frame_rate % 1001);
 466     intf_Msg("vpar info: %s, %s, matrix_coeff: %d",
 467              S.b_progressive ? "Progressive" : "Non-progressive",
 468              S.i_scalable_mode ? "scalable" : "non-scalable",
 469              S.i_matrix_coefficients);
 470 #endif
 471
 472     /* Dispose of matrices if they have been allocated. */
 473     if( p_vpar->sequence.intra_quant.b_allocated )
 474     {
 475         free( p_vpar->sequence.intra_quant.pi_matrix );
 476     }
 477     if( p_vpar->sequence.nonintra_quant.b_allocated )
 478     {
 479         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 480     }
 481     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 482     {
 483         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 484     }
 485     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 486     {
 487         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 488     }
 489
 490 #ifdef VDEC_SMP
 491     /* Destroy vdec threads */
 492     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 493     {
 494         if( p_vpar->pp_vdec[i_dummy] != NULL )
 495             vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
 496         else
 497             break;
 498     }
 499 #else
 500     free( p_vpar->pp_vdec[0] );
 501 #endif
 502
 503     free( p_vpar->p_config );
 504
 505 #ifdef VDEC_SMP
 506     /* Destroy lock and cond */
 507     vlc_mutex_destroy( &(p_vpar->vbuffer.lock) );
 508     vlc_cond_destroy( &(p_vpar->vfifo.wait) );
 509     vlc_mutex_destroy( &(p_vpar->vfifo.lock) );
 510 #endif
 511
 512     vlc_mutex_destroy( &(p_vpar->synchro.fifo_lock) );
 513
 514     module_Unneed( p_main->p_module_bank, p_vpar->p_idct_module );
 515     module_Unneed( p_main->p_module_bank, p_vpar->p_motion_module );
 516
 517     free( p_vpar );
 518
 519     intf_DbgMsg("vpar debug: EndThread(%p)", p_vpar);
 520 }
 521
 522 /*****************************************************************************
 523  * BitstreamCallback: Import parameters from the new data/PES packet
 524  *****************************************************************************
 525  * This function is called by input's NextDataPacket.
 526  *****************************************************************************/
 527 static void BitstreamCallback ( bit_stream_t * p_bit_stream,
 528                                 boolean_t b_new_pes )
 529 {
 530     vpar_thread_t * p_vpar = (vpar_thread_t *)p_bit_stream->p_callback_arg;
 531
 532     if( b_new_pes )
 533     {
 534         p_vpar->sequence.next_pts =
 535             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_pts;
 536         p_vpar->sequence.next_dts =
 537             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_dts;
 538         p_vpar->sequence.i_current_rate =
 539             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_rate;
 540     }
 541 }