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 1.56 2000/12/21 14:18:15 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 /* FIXME: passer en terminate/destroy avec les signaux supplémentaires ?? */
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30 #include "defs.h"
  31
  32 #include <stdlib.h>                                      /* malloc(), free() */
  33 #include <unistd.h>                                              /* getpid() */
  34 #include <sys/types.h>                        /* on BSD, uio.h needs types.h */
  35 #include <sys/uio.h>                                            /* "input.h" */
  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 "plugins.h"
  48
  49 #include "intf_msg.h"
  50 #include "debug.h"                 /* XXX?? temporaire, requis par netlist.h */
  51
  52 #include "stream_control.h"
  53 #include "input_ext-dec.h"
  54
  55 #include "video.h"
  56 #include "video_output.h"
  57
  58 #include "vdec_idct.h"
  59 #include "video_decoder.h"
  60 #include "vdec_motion.h"
  61
  62 #include "vpar_blocks.h"
  63 #include "vpar_headers.h"
  64 #include "vpar_synchro.h"
  65 #include "video_parser.h"
  66 #include "video_fifo.h"
  67
  68 /*
  69  * Local prototypes
  70  */
  71 static int      InitThread          ( vpar_thread_t *p_vpar );
  72 static void     RunThread           ( vpar_thread_t *p_vpar );
  73 static void     ErrorThread         ( vpar_thread_t *p_vpar );
  74 static void     EndThread           ( vpar_thread_t *p_vpar );
  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  * Following configuration properties are used:
  82  * XXX??
  83  *****************************************************************************/
  84 vlc_thread_t vpar_CreateThread( vdec_config_t * p_config )
  85 {
  86     vpar_thread_t *     p_vpar;
  87
  88     intf_DbgMsg( "vpar debug: creating video parser thread\n" );
  89
  90     /* Allocate the memory needed to store the thread's structure */
  91     if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
  92     {
  93         intf_ErrMsg( "vpar error: not enough memory "
  94                      "for vpar_CreateThread() to create the new thread\n");
  95         return( 0 );
  96     }
  97
  98     /*
  99      * Initialize the thread properties
 100      */
 101     p_vpar->p_fifo = p_config->decoder_config.p_decoder_fifo;
 102     p_vpar->p_config = p_config;
 103
 104     p_vpar->p_vout = p_config->p_vout;
 105
 106     /* Spawn the video parser thread */
 107     if ( vlc_thread_create( &p_vpar->thread_id, "video parser",
 108                             (vlc_thread_func_t)RunThread, (void *)p_vpar ) )
 109     {
 110         intf_ErrMsg("vpar error: can't spawn video parser thread\n");
 111         free( p_vpar );
 112         return( 0 );
 113     }
 114
 115     intf_DbgMsg("vpar debug: video parser thread (%p) created\n", p_vpar);
 116     return( p_vpar->thread_id );
 117 }
 118
 119 /* following functions are local */
 120
 121 /*****************************************************************************
 122  * InitThread: initialize vpar output thread
 123  *****************************************************************************
 124  * This function is called from RunThread and performs the second step of the
 125  * initialization. It returns 0 on success. Note that the thread's flag are not
 126  * modified inside this function.
 127  *****************************************************************************/
 128 static int InitThread( vpar_thread_t *p_vpar )
 129 {
 130 #ifdef VDEC_SMP
 131     int i_dummy;
 132 #endif
 133
 134     intf_DbgMsg("vpar debug: initializing video parser thread %p\n", p_vpar);
 135
 136     p_vpar->p_config->decoder_config.pf_init_bit_stream( &p_vpar->bit_stream,
 137         p_vpar->p_config->decoder_config.p_decoder_fifo );
 138
 139     /* Initialize parsing data */
 140     p_vpar->sequence.p_forward = NULL;
 141     p_vpar->sequence.p_backward = NULL;
 142     p_vpar->sequence.intra_quant.b_allocated = 0;
 143     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 144     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 145     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 146
 147     /* Initialize copyright information */
 148     p_vpar->sequence.b_copyright_flag = 0;
 149     p_vpar->sequence.b_original = 0;
 150     p_vpar->sequence.i_copyright_id = 0;
 151     p_vpar->sequence.i_copyright_nb = 0;
 152
 153     p_vpar->picture.p_picture = NULL;
 154     p_vpar->picture.i_current_structure = 0;
 155
 156     /* Initialize other properties */
 157 #ifdef STATS
 158     p_vpar->c_loops = 0;
 159     p_vpar->c_sequences = 0;
 160     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 161     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 162     memset(p_vpar->pc_malformed_pictures, 0,
 163            sizeof(p_vpar->pc_malformed_pictures));
 164 #endif
 165
 166     /* Initialize video FIFO */
 167     vpar_InitFIFO( p_vpar );
 168
 169     memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
 170
 171 #ifdef VDEC_SMP
 172     /* Spawn video_decoder threads */
 173     /* FIXME: modify the number of vdecs at runtime ?? */
 174     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 175     {
 176         if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
 177         {
 178             return( 1 );
 179         }
 180     }
 181 #else
 182     /* Fake a video_decoder thread */
 183     if( (p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t )))
 184          == NULL || vdec_InitThread( p_vpar->pp_vdec[0] ) )
 185     {
 186         return( 1 );
 187     }
 188     p_vpar->pp_vdec[0]->b_die = 0;
 189     p_vpar->pp_vdec[0]->b_error = 0;
 190     p_vpar->pp_vdec[0]->p_vpar = p_vpar;
 191
 192     /* Re-nice ourself */
 193     if( nice(VDEC_NICE) == -1 )
 194     {
 195         intf_WarnMsg( 2, "vpar warning : couldn't nice() (%s)\n",
 196                       strerror(errno) );
 197     }
 198 #endif
 199
 200     /* Initialize lookup tables */
 201 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
 202     vpar_InitCrop( p_vpar );
 203 #endif
 204     vpar_InitMbAddrInc( p_vpar );
 205     vpar_InitDCTTables( p_vpar );
 206     vpar_InitPMBType( p_vpar );
 207     vpar_InitBMBType( p_vpar );
 208     vpar_InitDCTTables( p_vpar );
 209
 210     /*
 211      * Initialize the synchro properties
 212      */
 213     vpar_SynchroInit( p_vpar );
 214
 215     /* Mark thread as running and return */
 216     intf_DbgMsg("vpar debug: InitThread(%p) succeeded\n", p_vpar);
 217     return( 0 );
 218 }
 219
 220 /*****************************************************************************
 221  * RunThread: generic parser thread
 222  *****************************************************************************
 223  * Video parser thread. This function only returns when the thread is
 224  * terminated.
 225  *****************************************************************************/
 226 static void RunThread( vpar_thread_t *p_vpar )
 227 {
 228     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)\n", p_vpar, getpid());
 229
 230     /*
 231      * Initialize thread
 232      */
 233     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 234
 235     /*
 236      * Main loop - it is not executed if an error occured during
 237      * initialization
 238      */
 239     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 240     {
 241         /* Find the next sequence header in the stream */
 242         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 243
 244         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 245         {
 246 #ifdef STATS
 247             p_vpar->c_loops++;
 248 #endif
 249             /* Parse the next sequence, group or picture header */
 250             if( vpar_ParseHeader( p_vpar ) )
 251             {
 252                 /* End of sequence */
 253                 break;
 254             };
 255         }
 256     }
 257
 258     /*
 259      * Error loop
 260      */
 261     if( p_vpar->p_fifo->b_error )
 262     {
 263         ErrorThread( p_vpar );
 264     }
 265
 266     /* End of thread */
 267     EndThread( p_vpar );
 268 }
 269
 270 /*****************************************************************************
 271  * ErrorThread: RunThread() error loop
 272  *****************************************************************************
 273  * This function is called when an error occured during thread main's loop. The
 274  * thread can still receive feed, but must be ready to terminate as soon as
 275  * possible.
 276  *****************************************************************************/
 277 static void ErrorThread( vpar_thread_t *p_vpar )
 278 {
 279     /* We take the lock, because we are going to read/write the start/end
 280      * indexes of the decoder fifo */
 281     vlc_mutex_lock( &p_vpar->p_fifo->data_lock );
 282
 283     /* Wait until a `die' order is sent */
 284     while( !p_vpar->p_fifo->b_die )
 285     {
 286         /* Trash all received PES packets */
 287         while( !DECODER_FIFO_ISEMPTY(*p_vpar->p_fifo) )
 288         {
 289             p_vpar->p_fifo->pf_delete_pes( p_vpar->p_fifo->p_packets_mgt,
 290                                   DECODER_FIFO_START(*p_vpar->p_fifo) );
 291             DECODER_FIFO_INCSTART( *p_vpar->p_fifo );
 292         }
 293
 294         /* Waiting for the input thread to put new PES packets in the fifo */
 295         vlc_cond_wait( &p_vpar->p_fifo->data_wait, &p_vpar->p_fifo->data_lock );
 296     }
 297
 298     /* We can release the lock before leaving */
 299     vlc_mutex_unlock( &p_vpar->p_fifo->data_lock );
 300 }
 301
 302 /*****************************************************************************
 303  * EndThread: thread destruction
 304  *****************************************************************************
 305  * This function is called when the thread ends after a sucessful
 306  * initialization.
 307  *****************************************************************************/
 308 static void EndThread( vpar_thread_t *p_vpar )
 309 {
 310 #ifdef VDEC_SMP
 311     int i_dummy;
 312 #endif
 313
 314     intf_DbgMsg("vpar debug: destroying video parser thread %p\n", p_vpar);
 315
 316 #ifdef STATS
 317     intf_Msg("vpar stats: %d loops among %d sequence(s)\n",
 318              p_vpar->c_loops, p_vpar->c_sequences);
 319
 320     {
 321         struct tms cpu_usage;
 322         times( &cpu_usage );
 323
 324         intf_Msg("vpar stats: cpu usage (user: %d, system: %d)\n",
 325                  cpu_usage.tms_utime, cpu_usage.tms_stime);
 326     }
 327
 328     intf_Msg("vpar stats: Read %d frames/fields (I %d/P %d/B %d)\n",
 329              p_vpar->pc_pictures[I_CODING_TYPE]
 330              + p_vpar->pc_pictures[P_CODING_TYPE]
 331              + p_vpar->pc_pictures[B_CODING_TYPE],
 332              p_vpar->pc_pictures[I_CODING_TYPE],
 333              p_vpar->pc_pictures[P_CODING_TYPE],
 334              p_vpar->pc_pictures[B_CODING_TYPE]);
 335     intf_Msg("vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)\n",
 336              p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 337              + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 338              + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 339              p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 340              p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 341              p_vpar->pc_decoded_pictures[B_CODING_TYPE]);
 342     intf_Msg("vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)\n",
 343              p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 344              + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 345              + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 346              p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 347              p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 348              p_vpar->pc_malformed_pictures[B_CODING_TYPE]);
 349 #define S   p_vpar->sequence
 350     intf_Msg("vpar info: %s stream (%dx%d), %d pi/s\n",
 351              S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 352              S.i_width, S.i_height, S.i_frame_rate/1001);
 353     intf_Msg("vpar info: %s, %s, matrix_coeff: %d\n",
 354              S.b_progressive ? "Progressive" : "Non-progressive",
 355              S.i_scalable_mode ? "scalable" : "non-scalable",
 356              S.i_matrix_coefficients);
 357 #endif
 358
 359     /* Dispose of matrices if they have been allocated. */
 360     if( p_vpar->sequence.intra_quant.b_allocated )
 361     {
 362         free( p_vpar->sequence.intra_quant.pi_matrix );
 363     }
 364     if( p_vpar->sequence.nonintra_quant.b_allocated )
 365     {
 366         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 367     }
 368     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 369     {
 370         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 371     }
 372     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 373     {
 374         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 375     }
 376
 377 #ifdef VDEC_SMP
 378     /* Destroy vdec threads */
 379     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 380     {
 381         if( p_vpar->pp_vdec[i_dummy] != NULL )
 382             vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
 383         else
 384             break;
 385     }
 386 #else
 387     free( p_vpar->pp_vdec[0] );
 388 #endif
 389
 390     free( p_vpar->p_config );
 391     free( p_vpar );
 392
 393     intf_DbgMsg("vpar debug: EndThread(%p)\n", p_vpar);
 394 }