git.sesse.net Git - vlc/blob - src/video_decoder/video_parser.c

   1 /*****************************************************************************
   2  * video_parser.c : video parser thread
   3  *****************************************************************************
   4  * Copyright (C) 1999, 2000 VideoLAN
   5  * $Id: video_parser.c,v 1.3 2001/07/18 14:21:00 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
  32 #ifdef HAVE_UNISTD_H
  33 #include <unistd.h>                                              /* getpid() */
  34 #endif
  35
  36 #include <errno.h>
  37 #include <string.h>
  38
  39 #ifdef STATS
  40 #  include <sys/times.h>
  41 #endif
  42
  43 #include "config.h"
  44 #include "common.h"
  45 #include "threads.h"
  46 #include "mtime.h"
  47 #include "modules.h"
  48
  49 #include "intf_msg.h"
  50
  51 #include "stream_control.h"
  52 #include "input_ext-dec.h"
  53
  54 #include "video.h"
  55 #include "video_output.h"
  56
  57 #include "vdec_ext-plugins.h"
  58 #include "vpar_pool.h"
  59 #include "video_parser.h"
  60
  61 /*
  62  * Local prototypes
  63  */
  64 static int      InitThread          ( vpar_thread_t * );
  65 static void     RunThread           ( vpar_thread_t * );
  66 static void     ErrorThread         ( vpar_thread_t * );
  67 static void     EndThread           ( vpar_thread_t * );
  68 static void     BitstreamCallback   ( bit_stream_t *, boolean_t );
  69
  70 /*****************************************************************************
  71  * vpar_CreateThread: create a generic parser thread
  72  *****************************************************************************
  73  * This function creates a new video parser thread, and returns a pointer
  74  * to its description. On error, it returns NULL.
  75  *****************************************************************************/
  76 vlc_thread_t vpar_CreateThread( vdec_config_t * p_config )
  77 {
  78     vpar_thread_t *     p_vpar;
  79
  80     intf_DbgMsg( "vpar debug: creating video parser thread" );
  81
  82     /* Allocate the memory needed to store the thread's structure */
  83     if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
  84     {
  85         intf_ErrMsg( "vpar error: not enough memory "
  86                      "for vpar_CreateThread() to create the new thread");
  87         return( 0 );
  88     }
  89
  90     /*
  91      * Initialize the thread properties
  92      */
  93     p_vpar->p_fifo = p_config->decoder_config.p_decoder_fifo;
  94     p_vpar->p_config = p_config;
  95     p_vpar->p_vout = NULL;
  96
  97     /* Spawn the video parser thread */
  98     if ( vlc_thread_create( &p_vpar->thread_id, "video parser",
  99                             (vlc_thread_func_t)RunThread, (void *)p_vpar ) )
 100     {
 101         intf_ErrMsg("vpar error: can't spawn video parser thread");
 102         module_Unneed( p_vpar->p_idct_module );
 103         module_Unneed( p_vpar->p_motion_module );
 104         free( p_vpar );
 105         return( 0 );
 106     }
 107
 108     intf_DbgMsg("vpar debug: video parser thread (%p) created", p_vpar);
 109     return( p_vpar->thread_id );
 110 }
 111
 112 /* following functions are local */
 113
 114 /*****************************************************************************
 115  * InitThread: initialize vpar output thread
 116  *****************************************************************************
 117  * This function is called from RunThread and performs the second step of the
 118  * initialization. It returns 0 on success. Note that the thread's flag are not
 119  * modified inside this function.
 120  *****************************************************************************/
 121 static int InitThread( vpar_thread_t *p_vpar )
 122 {
 123     intf_DbgMsg("vpar debug: initializing video parser thread %p", p_vpar);
 124
 125     /*
 126      * Choose the best motion compensation module
 127      */
 128     p_vpar->p_motion_module = module_Need( MODULE_CAPABILITY_MOTION, NULL );
 129
 130     if( p_vpar->p_motion_module == NULL )
 131     {
 132         intf_ErrMsg( "vpar error: no suitable motion compensation module" );
 133         free( p_vpar );
 134         return( 0 );
 135     }
 136
 137 #define M ( p_vpar->pppf_motion )
 138 #define S ( p_vpar->ppf_motion_skipped )
 139 #define F ( p_vpar->p_motion_module->p_functions->motion.functions.motion )
 140     M[0][0][0] = M[0][0][1] = M[0][0][2] = M[0][0][3] = NULL;
 141     M[0][1][0] = M[0][1][1] = M[0][1][2] = M[0][1][3] = NULL;
 142     M[1][0][0] = NULL;
 143     M[1][1][0] = NULL;
 144     M[2][0][0] = NULL;
 145     M[2][1][0] = NULL;
 146     M[3][0][0] = NULL;
 147     M[3][1][0] = NULL;
 148
 149     M[1][0][1] = F.pf_field_field_420;
 150     M[1][1][1] = F.pf_frame_field_420;
 151     M[2][0][1] = F.pf_field_field_422;
 152     M[2][1][1] = F.pf_frame_field_422;
 153     M[3][0][1] = F.pf_field_field_444;
 154     M[3][1][1] = F.pf_frame_field_444;
 155
 156     M[1][0][2] = F.pf_field_16x8_420;
 157     M[1][1][2] = F.pf_frame_frame_420;
 158     M[2][0][2] = F.pf_field_16x8_422;
 159     M[2][1][2] = F.pf_frame_frame_422;
 160     M[3][0][2] = F.pf_field_16x8_444;
 161     M[3][1][2] = F.pf_frame_frame_444;
 162
 163     M[1][0][3] = F.pf_field_dmv_420;
 164     M[1][1][3] = F.pf_frame_dmv_420;
 165     M[2][0][3] = F.pf_field_dmv_422;
 166     M[2][1][3] = F.pf_frame_dmv_422;
 167     M[3][0][3] = F.pf_field_dmv_444;
 168     M[3][1][3] = F.pf_frame_dmv_444;
 169
 170     S[0][0] = S[0][1] = S[0][2] = S[0][3] = NULL;
 171     S[1][0] = NULL;
 172     S[2][0] = NULL;
 173     S[3][0] = NULL;
 174
 175     S[1][1] = F.pf_field_field_420;
 176     S[2][1] = F.pf_field_field_422;
 177     S[3][1] = F.pf_field_field_444;
 178
 179     S[1][2] = F.pf_field_field_420;
 180     S[2][2] = F.pf_field_field_422;
 181     S[3][2] = F.pf_field_field_444;
 182
 183     S[1][3] = F.pf_frame_frame_420;
 184     S[2][3] = F.pf_frame_frame_422;
 185     S[3][3] = F.pf_frame_frame_444;
 186 #undef F
 187 #undef S
 188 #undef M
 189
 190     /*
 191      * Choose the best IDCT module
 192      */
 193     p_vpar->p_idct_module = module_Need( MODULE_CAPABILITY_IDCT, NULL );
 194
 195     if( p_vpar->p_idct_module == NULL )
 196     {
 197         intf_ErrMsg( "vpar error: no suitable IDCT module" );
 198         module_Unneed( p_vpar->p_motion_module );
 199         free( p_vpar );
 200         return( 0 );
 201     }
 202
 203 #define f p_vpar->p_idct_module->p_functions->idct.functions.idct
 204     p_vpar->pool.pf_idct_init    = f.pf_idct_init;
 205     p_vpar->pf_sparse_idct  = f.pf_sparse_idct;
 206     p_vpar->pf_idct         = f.pf_idct;
 207     p_vpar->pf_norm_scan    = f.pf_norm_scan;
 208     p_vpar->pool.pf_decode_init  = f.pf_decode_init;
 209     p_vpar->pf_decode_mb_c  = f.pf_decode_mb_c;
 210     p_vpar->pf_decode_mb_bw = f.pf_decode_mb_bw;
 211 #undef f
 212
 213     /* Initialize input bitstream */
 214     p_vpar->p_config->decoder_config.pf_init_bit_stream( &p_vpar->bit_stream,
 215         p_vpar->p_config->decoder_config.p_decoder_fifo, BitstreamCallback,
 216         (void *)p_vpar );
 217
 218     /* Initialize parsing data */
 219     p_vpar->sequence.p_forward = NULL;
 220     p_vpar->sequence.p_backward = NULL;
 221     p_vpar->sequence.intra_quant.b_allocated = 0;
 222     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 223     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 224     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 225     p_vpar->sequence.i_matrix_coefficients = 1;
 226     p_vpar->sequence.next_pts = p_vpar->sequence.next_dts = 0;
 227     p_vpar->sequence.b_expect_discontinuity = 0;
 228
 229     /* Initialize copyright information */
 230     p_vpar->sequence.b_copyright_flag = 0;
 231     p_vpar->sequence.b_original = 0;
 232     p_vpar->sequence.i_copyright_id = 0;
 233     p_vpar->sequence.i_copyright_nb = 0;
 234
 235     p_vpar->picture.p_picture = NULL;
 236     p_vpar->picture.i_current_structure = 0;
 237
 238     /* Initialize other properties */
 239 #ifdef STATS
 240     p_vpar->c_loops = 0;
 241     p_vpar->c_sequences = 0;
 242     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 243     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 244     memset(p_vpar->pc_malformed_pictures, 0,
 245            sizeof(p_vpar->pc_malformed_pictures));
 246 #endif
 247
 248     /* Initialize lookup tables */
 249     vpar_InitMbAddrInc( p_vpar );
 250     vpar_InitDCTTables( p_vpar );
 251     vpar_InitPMBType( p_vpar );
 252     vpar_InitBMBType( p_vpar );
 253     vpar_InitDCTTables( p_vpar );
 254     vpar_InitScanTable( p_vpar );
 255
 256     /*
 257      * Initialize the synchro properties
 258      */
 259     vpar_SynchroInit( p_vpar );
 260
 261     /* Spawn optional video decoder threads */
 262     vpar_InitPool( p_vpar );
 263
 264     /* Mark thread as running and return */
 265     intf_DbgMsg("vpar debug: InitThread(%p) succeeded", p_vpar);
 266     return( 0 );
 267 }
 268
 269 /*****************************************************************************
 270  * RunThread: generic parser thread
 271  *****************************************************************************
 272  * Video parser thread. This function only returns when the thread is
 273  * terminated.
 274  *****************************************************************************/
 275 static void RunThread( vpar_thread_t *p_vpar )
 276 {
 277     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)", p_vpar, getpid());
 278
 279     /*
 280      * Initialize thread
 281      */
 282     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 283
 284     /*
 285      * Main loop - it is not executed if an error occured during
 286      * initialization
 287      */
 288     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 289     {
 290         /* Find the next sequence header in the stream */
 291         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 292
 293         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 294         {
 295 #ifdef STATS
 296             p_vpar->c_loops++;
 297 #endif
 298             /* Parse the next sequence, group or picture header */
 299             if( vpar_ParseHeader( p_vpar ) )
 300             {
 301                 /* End of sequence */
 302                 break;
 303             }
 304         }
 305     }
 306
 307     /*
 308      * Error loop
 309      */
 310     if( p_vpar->p_fifo->b_error )
 311     {
 312         ErrorThread( p_vpar );
 313     }
 314
 315     /* End of thread */
 316     EndThread( p_vpar );
 317 }
 318
 319 /*****************************************************************************
 320  * ErrorThread: RunThread() error loop
 321  *****************************************************************************
 322  * This function is called when an error occured during thread main's loop. The
 323  * thread can still receive feed, but must be ready to terminate as soon as
 324  * possible.
 325  *****************************************************************************/
 326 static void ErrorThread( vpar_thread_t *p_vpar )
 327 {
 328     /* We take the lock, because we are going to read/write the start/end
 329      * indexes of the decoder fifo */
 330     vlc_mutex_lock( &p_vpar->p_fifo->data_lock );
 331
 332     /* Wait until a `die' order is sent */
 333     while( !p_vpar->p_fifo->b_die )
 334     {
 335         /* Trash all received PES packets */
 336         while( !DECODER_FIFO_ISEMPTY(*p_vpar->p_fifo) )
 337         {
 338             p_vpar->p_fifo->pf_delete_pes( p_vpar->p_fifo->p_packets_mgt,
 339                                   DECODER_FIFO_START(*p_vpar->p_fifo) );
 340             DECODER_FIFO_INCSTART( *p_vpar->p_fifo );
 341         }
 342
 343         /* Waiting for the input thread to put new PES packets in the fifo */
 344         vlc_cond_wait( &p_vpar->p_fifo->data_wait, &p_vpar->p_fifo->data_lock );
 345     }
 346
 347     /* We can release the lock before leaving */
 348     vlc_mutex_unlock( &p_vpar->p_fifo->data_lock );
 349 }
 350
 351 /*****************************************************************************
 352  * EndThread: thread destruction
 353  *****************************************************************************
 354  * This function is called when the thread ends after a sucessful
 355  * initialization.
 356  *****************************************************************************/
 357 static void EndThread( vpar_thread_t *p_vpar )
 358 {
 359     intf_DbgMsg("vpar debug: destroying video parser thread %p", p_vpar);
 360
 361     /* Release used video buffers. */
 362     if( p_vpar->sequence.p_forward != NULL )
 363     {
 364         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_forward );
 365     }
 366     if( p_vpar->sequence.p_backward != NULL )
 367     {
 368         vout_DatePicture( p_vpar->p_vout, p_vpar->sequence.p_backward,
 369                           vpar_SynchroDate( p_vpar ) );
 370         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_backward );
 371     }
 372     if( p_vpar->picture.p_picture != NULL )
 373     {
 374         vout_DestroyPicture( p_vpar->p_vout, p_vpar->picture.p_picture );
 375     }
 376
 377 #ifdef STATS
 378     intf_Msg("vpar stats: %d loops among %d sequence(s)",
 379              p_vpar->c_loops, p_vpar->c_sequences);
 380
 381     {
 382         struct tms cpu_usage;
 383         times( &cpu_usage );
 384
 385         intf_Msg("vpar stats: cpu usage (user: %d, system: %d)",
 386                  cpu_usage.tms_utime, cpu_usage.tms_stime);
 387     }
 388
 389     intf_Msg("vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 390              p_vpar->pc_pictures[I_CODING_TYPE]
 391              + p_vpar->pc_pictures[P_CODING_TYPE]
 392              + p_vpar->pc_pictures[B_CODING_TYPE],
 393              p_vpar->pc_pictures[I_CODING_TYPE],
 394              p_vpar->pc_pictures[P_CODING_TYPE],
 395              p_vpar->pc_pictures[B_CODING_TYPE]);
 396     intf_Msg("vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 397              p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 398              + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 399              + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 400              p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 401              p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 402              p_vpar->pc_decoded_pictures[B_CODING_TYPE]);
 403     intf_Msg("vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 404              p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 405              + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 406              + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 407              p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 408              p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 409              p_vpar->pc_malformed_pictures[B_CODING_TYPE]);
 410 #define S   p_vpar->sequence
 411     intf_Msg("vpar info: %s stream (%dx%d), %d.%d pi/s",
 412              S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 413              S.i_width, S.i_height, S.i_frame_rate/1001, S.i_frame_rate % 1001);
 414     intf_Msg("vpar info: %s, %s, matrix_coeff: %d",
 415              S.b_progressive ? "Progressive" : "Non-progressive",
 416              S.i_scalable_mode ? "scalable" : "non-scalable",
 417              S.i_matrix_coefficients);
 418 #endif
 419
 420     /* Dispose of matrices if they have been allocated. */
 421     if( p_vpar->sequence.intra_quant.b_allocated )
 422     {
 423         free( p_vpar->sequence.intra_quant.pi_matrix );
 424     }
 425     if( p_vpar->sequence.nonintra_quant.b_allocated )
 426     {
 427         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 428     }
 429     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 430     {
 431         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 432     }
 433     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 434     {
 435         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 436     }
 437
 438     vpar_EndPool( p_vpar );
 439
 440     free( p_vpar->p_config );
 441
 442     module_Unneed( p_vpar->p_idct_module );
 443     module_Unneed( p_vpar->p_motion_module );
 444
 445     free( p_vpar );
 446
 447     intf_DbgMsg("vpar debug: EndThread(%p)", p_vpar);
 448 }
 449
 450 /*****************************************************************************
 451  * BitstreamCallback: Import parameters from the new data/PES packet
 452  *****************************************************************************
 453  * This function is called by input's NextDataPacket.
 454  *****************************************************************************/
 455 static void BitstreamCallback ( bit_stream_t * p_bit_stream,
 456                                 boolean_t b_new_pes )
 457 {
 458     vpar_thread_t * p_vpar = (vpar_thread_t *)p_bit_stream->p_callback_arg;
 459
 460     if( b_new_pes )
 461     {
 462         p_vpar->sequence.next_pts =
 463             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_pts;
 464         p_vpar->sequence.next_dts =
 465             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_dts;
 466         p_vpar->sequence.i_current_rate =
 467             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_rate;
 468
 469         if( DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->b_discontinuity )
 470         {
 471 #ifdef TRACE_VPAR
 472             intf_DbgMsg( "Discontinuity in BitstreamCallback" );
 473 #endif
 474             /* Escape the current picture and reset the picture predictors. */
 475             p_vpar->sequence.b_expect_discontinuity = 1;
 476             p_vpar->picture.b_error = 1;
 477         }
 478     }
 479
 480     if( p_bit_stream->p_data->b_discard_payload )
 481     {
 482 #ifdef TRACE_VPAR
 483         intf_DbgMsg( "Discard payload in BitstreamCallback" );
 484 #endif
 485         /* 1 packet messed up, trash the slice. */
 486         p_vpar->picture.b_error = 1;
 487     }
 488 }