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 1.67 2001/01/15 13:25:09 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 "../video_decoder/vdec_motion.h"
  56 #include "../video_decoder/vdec_idct.h"
  57
  58 #include "../video_decoder/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     /* Choose the best IDCT module */
 105     p_vpar->p_module = module_Need( p_main->p_module_bank,
 106                                     MODULE_CAPABILITY_IDCT, NULL );
 107
 108     if( p_vpar->p_module == NULL )
 109     {
 110         intf_ErrMsg( "vpar error: no suitable IDCT module" );
 111         free( p_vpar );
 112         return( 0 );
 113     }
 114
 115 #define idct_functions p_vpar->p_module->p_functions->idct.functions.idct
 116     p_vpar->pf_init         = idct_functions.pf_init;
 117     p_vpar->pf_sparse_idct  = idct_functions.pf_sparse_idct;
 118     p_vpar->pf_idct         = idct_functions.pf_idct;
 119 #undef idct_functions
 120
 121     /* Spawn the video parser thread */
 122     if ( vlc_thread_create( &p_vpar->thread_id, "video parser",
 123                             (vlc_thread_func_t)RunThread, (void *)p_vpar ) )
 124     {
 125         intf_ErrMsg("vpar error: can't spawn video parser thread");
 126         module_Unneed( p_main->p_module_bank, p_vpar->p_module );
 127         free( p_vpar );
 128         return( 0 );
 129     }
 130
 131     intf_DbgMsg("vpar debug: video parser thread (%p) created", p_vpar);
 132     return( p_vpar->thread_id );
 133 }
 134
 135 /* following functions are local */
 136
 137 /*****************************************************************************
 138  * InitThread: initialize vpar output thread
 139  *****************************************************************************
 140  * This function is called from RunThread and performs the second step of the
 141  * initialization. It returns 0 on success. Note that the thread's flag are not
 142  * modified inside this function.
 143  *****************************************************************************/
 144 static int InitThread( vpar_thread_t *p_vpar )
 145 {
 146 #ifdef VDEC_SMP
 147     int i_dummy;
 148 #endif
 149
 150     intf_DbgMsg("vpar debug: initializing video parser thread %p", p_vpar);
 151
 152     p_vpar->p_config->decoder_config.pf_init_bit_stream( &p_vpar->bit_stream,
 153         p_vpar->p_config->decoder_config.p_decoder_fifo );
 154     p_vpar->bit_stream.pf_bitstream_callback = BitstreamCallback;
 155     p_vpar->bit_stream.p_callback_arg = (void *)p_vpar;
 156
 157     /* Initialize parsing data */
 158     p_vpar->sequence.p_forward = NULL;
 159     p_vpar->sequence.p_backward = NULL;
 160     p_vpar->sequence.intra_quant.b_allocated = 0;
 161     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 162     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 163     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 164     p_vpar->sequence.i_matrix_coefficients = 1;
 165     p_vpar->sequence.next_pts = p_vpar->sequence.next_dts = 0;
 166
 167     /* Initialize copyright information */
 168     p_vpar->sequence.b_copyright_flag = 0;
 169     p_vpar->sequence.b_original = 0;
 170     p_vpar->sequence.i_copyright_id = 0;
 171     p_vpar->sequence.i_copyright_nb = 0;
 172
 173     p_vpar->picture.p_picture = NULL;
 174     p_vpar->picture.i_current_structure = 0;
 175
 176     /* Initialize other properties */
 177 #ifdef STATS
 178     p_vpar->c_loops = 0;
 179     p_vpar->c_sequences = 0;
 180     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 181     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 182     memset(p_vpar->pc_malformed_pictures, 0,
 183            sizeof(p_vpar->pc_malformed_pictures));
 184 #endif
 185
 186     /* Initialize video FIFO */
 187     vpar_InitFIFO( p_vpar );
 188
 189     memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
 190
 191 #ifdef VDEC_SMP
 192     /* Spawn video_decoder threads */
 193     /* FIXME: modify the number of vdecs at runtime ?? */
 194     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 195     {
 196         if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
 197         {
 198             return( 1 );
 199         }
 200     }
 201 #else
 202     /* Fake a video_decoder thread */
 203     if( (p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t )))
 204          == NULL || vdec_InitThread( p_vpar->pp_vdec[0] ) )
 205     {
 206         return( 1 );
 207     }
 208     p_vpar->pp_vdec[0]->b_die = 0;
 209     p_vpar->pp_vdec[0]->b_error = 0;
 210     p_vpar->pp_vdec[0]->p_vpar = p_vpar;
 211
 212 #   if VDEC_NICE
 213     /* Re-nice ourself */
 214     if( nice(VDEC_NICE) == -1 )
 215     {
 216         intf_WarnMsg( 2, "vpar warning : couldn't nice() (%s)",
 217                       strerror(errno) );
 218     }
 219 #   endif
 220 #endif
 221
 222     /* Initialize lookup tables */
 223 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
 224     vpar_InitCrop( p_vpar );
 225 #endif
 226     vpar_InitMbAddrInc( p_vpar );
 227     vpar_InitDCTTables( p_vpar );
 228     vpar_InitPMBType( p_vpar );
 229     vpar_InitBMBType( p_vpar );
 230     vpar_InitDCTTables( p_vpar );
 231
 232     /*
 233      * Initialize the synchro properties
 234      */
 235     vpar_SynchroInit( p_vpar );
 236
 237     /* Mark thread as running and return */
 238     intf_DbgMsg("vpar debug: InitThread(%p) succeeded", p_vpar);
 239     return( 0 );
 240 }
 241
 242 /*****************************************************************************
 243  * RunThread: generic parser thread
 244  *****************************************************************************
 245  * Video parser thread. This function only returns when the thread is
 246  * terminated.
 247  *****************************************************************************/
 248 static void RunThread( vpar_thread_t *p_vpar )
 249 {
 250     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)", p_vpar, getpid());
 251
 252     /*
 253      * Initialize thread
 254      */
 255     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 256
 257     /*
 258      * Main loop - it is not executed if an error occured during
 259      * initialization
 260      */
 261     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 262     {
 263         /* Find the next sequence header in the stream */
 264         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 265
 266         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 267         {
 268 #ifdef STATS
 269             p_vpar->c_loops++;
 270 #endif
 271             /* Parse the next sequence, group or picture header */
 272             if( vpar_ParseHeader( p_vpar ) )
 273             {
 274                 /* End of sequence */
 275                 break;
 276             };
 277         }
 278     }
 279
 280     /*
 281      * Error loop
 282      */
 283     if( p_vpar->p_fifo->b_error )
 284     {
 285         ErrorThread( p_vpar );
 286     }
 287
 288     /* End of thread */
 289     EndThread( p_vpar );
 290 }
 291
 292 /*****************************************************************************
 293  * ErrorThread: RunThread() error loop
 294  *****************************************************************************
 295  * This function is called when an error occured during thread main's loop. The
 296  * thread can still receive feed, but must be ready to terminate as soon as
 297  * possible.
 298  *****************************************************************************/
 299 static void ErrorThread( vpar_thread_t *p_vpar )
 300 {
 301     /* We take the lock, because we are going to read/write the start/end
 302      * indexes of the decoder fifo */
 303     vlc_mutex_lock( &p_vpar->p_fifo->data_lock );
 304
 305     /* Wait until a `die' order is sent */
 306     while( !p_vpar->p_fifo->b_die )
 307     {
 308         /* Trash all received PES packets */
 309         while( !DECODER_FIFO_ISEMPTY(*p_vpar->p_fifo) )
 310         {
 311             p_vpar->p_fifo->pf_delete_pes( p_vpar->p_fifo->p_packets_mgt,
 312                                   DECODER_FIFO_START(*p_vpar->p_fifo) );
 313             DECODER_FIFO_INCSTART( *p_vpar->p_fifo );
 314         }
 315
 316         /* Waiting for the input thread to put new PES packets in the fifo */
 317         vlc_cond_wait( &p_vpar->p_fifo->data_wait, &p_vpar->p_fifo->data_lock );
 318     }
 319
 320     /* We can release the lock before leaving */
 321     vlc_mutex_unlock( &p_vpar->p_fifo->data_lock );
 322 }
 323
 324 /*****************************************************************************
 325  * EndThread: thread destruction
 326  *****************************************************************************
 327  * This function is called when the thread ends after a sucessful
 328  * initialization.
 329  *****************************************************************************/
 330 static void EndThread( vpar_thread_t *p_vpar )
 331 {
 332 #ifdef VDEC_SMP
 333     int i_dummy;
 334 #endif
 335
 336     intf_DbgMsg("vpar debug: destroying video parser thread %p", p_vpar);
 337
 338     /* Release used video buffers. */
 339     if( p_vpar->sequence.p_forward != NULL )
 340     {
 341         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_forward );
 342     }
 343     if( p_vpar->sequence.p_backward != NULL )
 344     {
 345         vout_DatePicture( p_vpar->p_vout, p_vpar->sequence.p_backward,
 346                           vpar_SynchroDate( p_vpar ) );
 347         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_backward );
 348     }
 349
 350 #ifdef STATS
 351     intf_Msg("vpar stats: %d loops among %d sequence(s)",
 352              p_vpar->c_loops, p_vpar->c_sequences);
 353
 354     {
 355         struct tms cpu_usage;
 356         times( &cpu_usage );
 357
 358         intf_Msg("vpar stats: cpu usage (user: %d, system: %d)",
 359                  cpu_usage.tms_utime, cpu_usage.tms_stime);
 360     }
 361
 362     intf_Msg("vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 363              p_vpar->pc_pictures[I_CODING_TYPE]
 364              + p_vpar->pc_pictures[P_CODING_TYPE]
 365              + p_vpar->pc_pictures[B_CODING_TYPE],
 366              p_vpar->pc_pictures[I_CODING_TYPE],
 367              p_vpar->pc_pictures[P_CODING_TYPE],
 368              p_vpar->pc_pictures[B_CODING_TYPE]);
 369     intf_Msg("vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 370              p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 371              + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 372              + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 373              p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 374              p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 375              p_vpar->pc_decoded_pictures[B_CODING_TYPE]);
 376     intf_Msg("vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 377              p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 378              + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 379              + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 380              p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 381              p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 382              p_vpar->pc_malformed_pictures[B_CODING_TYPE]);
 383 #define S   p_vpar->sequence
 384     intf_Msg("vpar info: %s stream (%dx%d), %d.%d pi/s",
 385              S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 386              S.i_width, S.i_height, S.i_frame_rate/1001, S.i_frame_rate % 1001);
 387     intf_Msg("vpar info: %s, %s, matrix_coeff: %d",
 388              S.b_progressive ? "Progressive" : "Non-progressive",
 389              S.i_scalable_mode ? "scalable" : "non-scalable",
 390              S.i_matrix_coefficients);
 391 #endif
 392
 393     /* Dispose of matrices if they have been allocated. */
 394     if( p_vpar->sequence.intra_quant.b_allocated )
 395     {
 396         free( p_vpar->sequence.intra_quant.pi_matrix );
 397     }
 398     if( p_vpar->sequence.nonintra_quant.b_allocated )
 399     {
 400         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 401     }
 402     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 403     {
 404         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 405     }
 406     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 407     {
 408         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 409     }
 410
 411 #ifdef VDEC_SMP
 412     /* Destroy vdec threads */
 413     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 414     {
 415         if( p_vpar->pp_vdec[i_dummy] != NULL )
 416             vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
 417         else
 418             break;
 419     }
 420 #else
 421     free( p_vpar->pp_vdec[0] );
 422 #endif
 423
 424     free( p_vpar->p_config );
 425
 426 #ifdef VDEC_SMP
 427     /* Destroy lock and cond */
 428     vlc_mutex_destroy( &(p_vpar->vbuffer.lock) );
 429     vlc_cond_destroy( &(p_vpar->vfifo.wait) );
 430     vlc_mutex_destroy( &(p_vpar->vfifo.lock) );
 431 #endif
 432
 433     vlc_mutex_destroy( &(p_vpar->synchro.fifo_lock) );
 434
 435     module_Unneed( p_main->p_module_bank, p_vpar->p_module );
 436
 437     free( p_vpar );
 438
 439     intf_DbgMsg("vpar debug: EndThread(%p)", p_vpar);
 440 }
 441
 442 /*****************************************************************************
 443  * BitstreamCallback: Import parameters from the new data/PES packet
 444  *****************************************************************************
 445  * This function is called by input's NextDataPacket.
 446  *****************************************************************************/
 447 static void BitstreamCallback ( bit_stream_t * p_bit_stream,
 448                                 boolean_t b_new_pes )
 449 {
 450     vpar_thread_t * p_vpar = (vpar_thread_t *)p_bit_stream->p_callback_arg;
 451
 452     if( b_new_pes )
 453     {
 454         p_vpar->sequence.next_pts =
 455             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_pts;
 456         p_vpar->sequence.next_dts =
 457             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_dts;
 458     }
 459 }