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 1.68 2001/01/17 18:17:31 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     p_vpar->pf_norm_scan    = idct_functions.pf_norm_scan;
 120 #undef idct_functions
 121
 122     /* Spawn the video parser thread */
 123     if ( vlc_thread_create( &p_vpar->thread_id, "video parser",
 124                             (vlc_thread_func_t)RunThread, (void *)p_vpar ) )
 125     {
 126         intf_ErrMsg("vpar error: can't spawn video parser thread");
 127         module_Unneed( p_main->p_module_bank, p_vpar->p_module );
 128         free( p_vpar );
 129         return( 0 );
 130     }
 131
 132     intf_DbgMsg("vpar debug: video parser thread (%p) created", p_vpar);
 133     return( p_vpar->thread_id );
 134 }
 135
 136 /* following functions are local */
 137
 138 /*****************************************************************************
 139  * InitThread: initialize vpar output thread
 140  *****************************************************************************
 141  * This function is called from RunThread and performs the second step of the
 142  * initialization. It returns 0 on success. Note that the thread's flag are not
 143  * modified inside this function.
 144  *****************************************************************************/
 145 static int InitThread( vpar_thread_t *p_vpar )
 146 {
 147 #ifdef VDEC_SMP
 148     int i_dummy;
 149 #endif
 150
 151     intf_DbgMsg("vpar debug: initializing video parser thread %p", p_vpar);
 152
 153     p_vpar->p_config->decoder_config.pf_init_bit_stream( &p_vpar->bit_stream,
 154         p_vpar->p_config->decoder_config.p_decoder_fifo );
 155     p_vpar->bit_stream.pf_bitstream_callback = BitstreamCallback;
 156     p_vpar->bit_stream.p_callback_arg = (void *)p_vpar;
 157
 158     /* Initialize parsing data */
 159     p_vpar->sequence.p_forward = NULL;
 160     p_vpar->sequence.p_backward = NULL;
 161     p_vpar->sequence.intra_quant.b_allocated = 0;
 162     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 163     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 164     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 165     p_vpar->sequence.i_matrix_coefficients = 1;
 166     p_vpar->sequence.next_pts = p_vpar->sequence.next_dts = 0;
 167
 168     /* Initialize copyright information */
 169     p_vpar->sequence.b_copyright_flag = 0;
 170     p_vpar->sequence.b_original = 0;
 171     p_vpar->sequence.i_copyright_id = 0;
 172     p_vpar->sequence.i_copyright_nb = 0;
 173
 174     p_vpar->picture.p_picture = NULL;
 175     p_vpar->picture.i_current_structure = 0;
 176
 177     /* Initialize other properties */
 178 #ifdef STATS
 179     p_vpar->c_loops = 0;
 180     p_vpar->c_sequences = 0;
 181     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 182     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 183     memset(p_vpar->pc_malformed_pictures, 0,
 184            sizeof(p_vpar->pc_malformed_pictures));
 185 #endif
 186
 187     /* Initialize video FIFO */
 188     vpar_InitFIFO( p_vpar );
 189
 190     memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
 191
 192 #ifdef VDEC_SMP
 193     /* Spawn video_decoder threads */
 194     /* FIXME: modify the number of vdecs at runtime ?? */
 195     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 196     {
 197         if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
 198         {
 199             return( 1 );
 200         }
 201     }
 202 #else
 203     /* Fake a video_decoder thread */
 204     if( (p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t )))
 205          == NULL || vdec_InitThread( p_vpar->pp_vdec[0] ) )
 206     {
 207         return( 1 );
 208     }
 209     p_vpar->pp_vdec[0]->b_die = 0;
 210     p_vpar->pp_vdec[0]->b_error = 0;
 211     p_vpar->pp_vdec[0]->p_vpar = p_vpar;
 212
 213 #   if VDEC_NICE
 214     /* Re-nice ourself */
 215     if( nice(VDEC_NICE) == -1 )
 216     {
 217         intf_WarnMsg( 2, "vpar warning : couldn't nice() (%s)",
 218                       strerror(errno) );
 219     }
 220 #   endif
 221 #endif
 222
 223     /* Initialize lookup tables */
 224 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
 225     vpar_InitCrop( p_vpar );
 226 #endif
 227     vpar_InitMbAddrInc( p_vpar );
 228     vpar_InitDCTTables( p_vpar );
 229     vpar_InitPMBType( p_vpar );
 230     vpar_InitBMBType( p_vpar );
 231     vpar_InitDCTTables( p_vpar );
 232     vpar_InitScanTable( p_vpar );
 233
 234     /*
 235      * Initialize the synchro properties
 236      */
 237     vpar_SynchroInit( p_vpar );
 238
 239     /* Mark thread as running and return */
 240     intf_DbgMsg("vpar debug: InitThread(%p) succeeded", p_vpar);
 241     return( 0 );
 242 }
 243
 244 /*****************************************************************************
 245  * RunThread: generic parser thread
 246  *****************************************************************************
 247  * Video parser thread. This function only returns when the thread is
 248  * terminated.
 249  *****************************************************************************/
 250 static void RunThread( vpar_thread_t *p_vpar )
 251 {
 252     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)", p_vpar, getpid());
 253
 254     /*
 255      * Initialize thread
 256      */
 257     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 258
 259     /*
 260      * Main loop - it is not executed if an error occured during
 261      * initialization
 262      */
 263     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 264     {
 265         /* Find the next sequence header in the stream */
 266         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 267
 268         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 269         {
 270 #ifdef STATS
 271             p_vpar->c_loops++;
 272 #endif
 273             /* Parse the next sequence, group or picture header */
 274             if( vpar_ParseHeader( p_vpar ) )
 275             {
 276                 /* End of sequence */
 277                 break;
 278             };
 279         }
 280     }
 281
 282     /*
 283      * Error loop
 284      */
 285     if( p_vpar->p_fifo->b_error )
 286     {
 287         ErrorThread( p_vpar );
 288     }
 289
 290     /* End of thread */
 291     EndThread( p_vpar );
 292 }
 293
 294 /*****************************************************************************
 295  * ErrorThread: RunThread() error loop
 296  *****************************************************************************
 297  * This function is called when an error occured during thread main's loop. The
 298  * thread can still receive feed, but must be ready to terminate as soon as
 299  * possible.
 300  *****************************************************************************/
 301 static void ErrorThread( vpar_thread_t *p_vpar )
 302 {
 303     /* We take the lock, because we are going to read/write the start/end
 304      * indexes of the decoder fifo */
 305     vlc_mutex_lock( &p_vpar->p_fifo->data_lock );
 306
 307     /* Wait until a `die' order is sent */
 308     while( !p_vpar->p_fifo->b_die )
 309     {
 310         /* Trash all received PES packets */
 311         while( !DECODER_FIFO_ISEMPTY(*p_vpar->p_fifo) )
 312         {
 313             p_vpar->p_fifo->pf_delete_pes( p_vpar->p_fifo->p_packets_mgt,
 314                                   DECODER_FIFO_START(*p_vpar->p_fifo) );
 315             DECODER_FIFO_INCSTART( *p_vpar->p_fifo );
 316         }
 317
 318         /* Waiting for the input thread to put new PES packets in the fifo */
 319         vlc_cond_wait( &p_vpar->p_fifo->data_wait, &p_vpar->p_fifo->data_lock );
 320     }
 321
 322     /* We can release the lock before leaving */
 323     vlc_mutex_unlock( &p_vpar->p_fifo->data_lock );
 324 }
 325
 326 /*****************************************************************************
 327  * EndThread: thread destruction
 328  *****************************************************************************
 329  * This function is called when the thread ends after a sucessful
 330  * initialization.
 331  *****************************************************************************/
 332 static void EndThread( vpar_thread_t *p_vpar )
 333 {
 334 #ifdef VDEC_SMP
 335     int i_dummy;
 336 #endif
 337
 338     intf_DbgMsg("vpar debug: destroying video parser thread %p", p_vpar);
 339
 340     /* Release used video buffers. */
 341     if( p_vpar->sequence.p_forward != NULL )
 342     {
 343         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_forward );
 344     }
 345     if( p_vpar->sequence.p_backward != NULL )
 346     {
 347         vout_DatePicture( p_vpar->p_vout, p_vpar->sequence.p_backward,
 348                           vpar_SynchroDate( p_vpar ) );
 349         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_backward );
 350     }
 351
 352 #ifdef STATS
 353     intf_Msg("vpar stats: %d loops among %d sequence(s)",
 354              p_vpar->c_loops, p_vpar->c_sequences);
 355
 356     {
 357         struct tms cpu_usage;
 358         times( &cpu_usage );
 359
 360         intf_Msg("vpar stats: cpu usage (user: %d, system: %d)",
 361                  cpu_usage.tms_utime, cpu_usage.tms_stime);
 362     }
 363
 364     intf_Msg("vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 365              p_vpar->pc_pictures[I_CODING_TYPE]
 366              + p_vpar->pc_pictures[P_CODING_TYPE]
 367              + p_vpar->pc_pictures[B_CODING_TYPE],
 368              p_vpar->pc_pictures[I_CODING_TYPE],
 369              p_vpar->pc_pictures[P_CODING_TYPE],
 370              p_vpar->pc_pictures[B_CODING_TYPE]);
 371     intf_Msg("vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 372              p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 373              + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 374              + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 375              p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 376              p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 377              p_vpar->pc_decoded_pictures[B_CODING_TYPE]);
 378     intf_Msg("vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 379              p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 380              + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 381              + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 382              p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 383              p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 384              p_vpar->pc_malformed_pictures[B_CODING_TYPE]);
 385 #define S   p_vpar->sequence
 386     intf_Msg("vpar info: %s stream (%dx%d), %d.%d pi/s",
 387              S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 388              S.i_width, S.i_height, S.i_frame_rate/1001, S.i_frame_rate % 1001);
 389     intf_Msg("vpar info: %s, %s, matrix_coeff: %d",
 390              S.b_progressive ? "Progressive" : "Non-progressive",
 391              S.i_scalable_mode ? "scalable" : "non-scalable",
 392              S.i_matrix_coefficients);
 393 #endif
 394
 395     /* Dispose of matrices if they have been allocated. */
 396     if( p_vpar->sequence.intra_quant.b_allocated )
 397     {
 398         free( p_vpar->sequence.intra_quant.pi_matrix );
 399     }
 400     if( p_vpar->sequence.nonintra_quant.b_allocated )
 401     {
 402         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 403     }
 404     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 405     {
 406         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 407     }
 408     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 409     {
 410         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 411     }
 412
 413 #ifdef VDEC_SMP
 414     /* Destroy vdec threads */
 415     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 416     {
 417         if( p_vpar->pp_vdec[i_dummy] != NULL )
 418             vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
 419         else
 420             break;
 421     }
 422 #else
 423     free( p_vpar->pp_vdec[0] );
 424 #endif
 425
 426     free( p_vpar->p_config );
 427
 428 #ifdef VDEC_SMP
 429     /* Destroy lock and cond */
 430     vlc_mutex_destroy( &(p_vpar->vbuffer.lock) );
 431     vlc_cond_destroy( &(p_vpar->vfifo.wait) );
 432     vlc_mutex_destroy( &(p_vpar->vfifo.lock) );
 433 #endif
 434
 435     vlc_mutex_destroy( &(p_vpar->synchro.fifo_lock) );
 436
 437     module_Unneed( p_main->p_module_bank, p_vpar->p_module );
 438
 439     free( p_vpar );
 440
 441     intf_DbgMsg("vpar debug: EndThread(%p)", p_vpar);
 442 }
 443
 444 /*****************************************************************************
 445  * BitstreamCallback: Import parameters from the new data/PES packet
 446  *****************************************************************************
 447  * This function is called by input's NextDataPacket.
 448  *****************************************************************************/
 449 static void BitstreamCallback ( bit_stream_t * p_bit_stream,
 450                                 boolean_t b_new_pes )
 451 {
 452     vpar_thread_t * p_vpar = (vpar_thread_t *)p_bit_stream->p_callback_arg;
 453
 454     if( b_new_pes )
 455     {
 456         p_vpar->sequence.next_pts =
 457             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_pts;
 458         p_vpar->sequence.next_dts =
 459             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_dts;
 460     }
 461 }