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  *
   6  * Authors: Christophe Massiot <massiot@via.ecp.fr>
   7  *          Samuel Hocevar <sam@via.ecp.fr>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /* FIXME: passer en terminate/destroy avec les signaux supplémentaires ?? */
  25
  26 /*****************************************************************************
  27  * Preamble
  28  *****************************************************************************/
  29 #include "defs.h"
  30
  31 #include <stdlib.h>                                      /* malloc(), free() */
  32 #include <unistd.h>                                              /* getpid() */
  33 #include <sys/types.h>                        /* on BSD, uio.h needs types.h */
  34 #include <sys/uio.h>                                            /* "input.h" */
  35 #include <errno.h>
  36 #include <string.h>
  37
  38 #include "config.h"
  39 #include "common.h"
  40 #include "threads.h"
  41 #include "mtime.h"
  42 #include "plugins.h"
  43
  44 #include "intf_msg.h"
  45 #include "debug.h"                 /* XXX?? temporaire, requis par netlist.h */
  46
  47 #include "stream_control.h"
  48 #include "input_ext-dec.h"
  49
  50 #include "video.h"
  51 #include "video_output.h"
  52
  53 #include "vdec_idct.h"
  54 #include "video_decoder.h"
  55 #include "vdec_motion.h"
  56
  57 #include "vpar_blocks.h"
  58 #include "vpar_headers.h"
  59 #include "vpar_synchro.h"
  60 #include "video_parser.h"
  61 #include "video_fifo.h"
  62
  63 /*
  64  * Local prototypes
  65  */
  66 static int      InitThread          ( vpar_thread_t *p_vpar );
  67 static void     RunThread           ( vpar_thread_t *p_vpar );
  68 static void     ErrorThread         ( vpar_thread_t *p_vpar );
  69 static void     EndThread           ( vpar_thread_t *p_vpar );
  70
  71 /*****************************************************************************
  72  * vpar_CreateThread: create a generic parser thread
  73  *****************************************************************************
  74  * This function creates a new video parser thread, and returns a pointer
  75  * to its description. On error, it returns NULL.
  76  * Following configuration properties are used:
  77  * XXX??
  78  *****************************************************************************/
  79 vlc_thread_t vpar_CreateThread( vdec_config_t * p_config )
  80 {
  81     vpar_thread_t *     p_vpar;
  82
  83     intf_DbgMsg( "vpar debug: creating video parser thread\n" );
  84
  85     /* Allocate the memory needed to store the thread's structure */
  86     if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
  87     {
  88         intf_ErrMsg( "vpar error: not enough memory "
  89                      "for vpar_CreateThread() to create the new thread\n");
  90         return( 0 );
  91     }
  92
  93     /*
  94      * Initialize the thread properties
  95      */
  96     p_vpar->b_die = 0;
  97     p_vpar->b_error = 0;
  98     p_vpar->p_fifo = p_config->decoder_config.p_decoder_fifo;
  99     p_vpar->p_config = p_config;
 100
 101     p_vpar->p_vout = p_config->p_vout;
 102
 103     /* Spawn the video parser thread */
 104     if ( vlc_thread_create( &p_vpar->thread_id, "video parser",
 105                             (vlc_thread_func_t)RunThread, (void *)p_vpar ) )
 106     {
 107         intf_ErrMsg("vpar error: can't spawn video parser thread\n");
 108         free( p_vpar );
 109         return( 0 );
 110     }
 111
 112     intf_DbgMsg("vpar debug: video parser thread (%p) created\n", p_vpar);
 113     return( p_vpar->thread_id );
 114 }
 115
 116 /* following functions are local */
 117
 118 /*****************************************************************************
 119  * InitThread: initialize vpar output thread
 120  *****************************************************************************
 121  * This function is called from RunThread and performs the second step of the
 122  * initialization. It returns 0 on success. Note that the thread's flag are not
 123  * modified inside this function.
 124  *****************************************************************************/
 125 static int InitThread( vpar_thread_t *p_vpar )
 126 {
 127 #ifdef VDEC_SMP
 128     int i_dummy;
 129 #endif
 130
 131     intf_DbgMsg("vpar debug: initializing video parser thread %p\n", p_vpar);
 132
 133     p_vpar->p_config->decoder_config.pf_init_bit_stream( &p_vpar->bit_stream,
 134         p_vpar->p_config->decoder_config.p_decoder_fifo );
 135
 136     /* Initialize parsing data */
 137     p_vpar->sequence.p_forward = NULL;
 138     p_vpar->sequence.p_backward = NULL;
 139     p_vpar->sequence.intra_quant.b_allocated = 0;
 140     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 141     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 142     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 143
 144     /* Initialize copyright information */
 145     p_vpar->sequence.b_copyright_flag = 0;
 146     p_vpar->sequence.b_original = 0;
 147     p_vpar->sequence.i_copyright_id = 0;
 148     p_vpar->sequence.i_copyright_nb = 0;
 149
 150     p_vpar->picture.p_picture = NULL;
 151     p_vpar->picture.i_current_structure = 0;
 152
 153     /* Initialize other properties */
 154 #ifdef STATS
 155     p_vpar->c_loops = 0;
 156     p_vpar->c_sequences = 0;
 157     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 158     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 159     memset(p_vpar->pc_malformed_pictures, 0,
 160            sizeof(p_vpar->pc_malformed_pictures));
 161 #endif
 162
 163     /* Initialize video FIFO */
 164     vpar_InitFIFO( p_vpar );
 165
 166     memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
 167
 168 #ifdef VDEC_SMP
 169     /* Spawn video_decoder threads */
 170     /* FIXME: modify the number of vdecs at runtime ?? */
 171     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 172     {
 173         if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
 174         {
 175             return( 1 );
 176         }
 177     }
 178 #else
 179     /* Fake a video_decoder thread */
 180     if( (p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t )))
 181          == NULL || vdec_InitThread( p_vpar->pp_vdec[0] ) )
 182     {
 183         return( 1 );
 184     }
 185     p_vpar->pp_vdec[0]->b_die = 0;
 186     p_vpar->pp_vdec[0]->b_error = 0;
 187     p_vpar->pp_vdec[0]->p_vpar = p_vpar;
 188
 189     /* Re-nice ourself */
 190     if( nice(VDEC_NICE) == -1 )
 191     {
 192         intf_WarnMsg( 2, "vpar warning : couldn't nice() (%s)\n",
 193                       strerror(errno) );
 194     }
 195 #endif
 196
 197     /* Initialize lookup tables */
 198 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
 199     vpar_InitCrop( p_vpar );
 200 #endif
 201     vpar_InitMbAddrInc( p_vpar );
 202     vpar_InitDCTTables( p_vpar );
 203     vpar_InitPMBType( p_vpar );
 204     vpar_InitBMBType( p_vpar );
 205     vpar_InitDCTTables( p_vpar );
 206
 207     /*
 208      * Initialize the synchro properties
 209      */
 210     vpar_SynchroInit( p_vpar );
 211
 212     /* Mark thread as running and return */
 213     intf_DbgMsg("vpar debug: InitThread(%p) succeeded\n", p_vpar);
 214     return( 0 );
 215 }
 216
 217 /*****************************************************************************
 218  * RunThread: generic parser thread
 219  *****************************************************************************
 220  * Video parser thread. This function only returns when the thread is
 221  * terminated.
 222  *****************************************************************************/
 223 static void RunThread( vpar_thread_t *p_vpar )
 224 {
 225     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)\n", p_vpar, getpid());
 226
 227     /*
 228      * Initialize thread
 229      */
 230     p_vpar->b_error = InitThread( p_vpar );
 231
 232     p_vpar->b_run = 1;
 233
 234     /*
 235      * Main loop - it is not executed if an error occured during
 236      * initialization
 237      */
 238     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->b_error) )
 239     {
 240         /* Find the next sequence header in the stream */
 241         p_vpar->b_error = vpar_NextSequenceHeader( p_vpar );
 242
 243         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->b_error) )
 244         {
 245 #ifdef STATS
 246             p_vpar->c_loops++;
 247 #endif
 248             /* Parse the next sequence, group or picture header */
 249             if( vpar_ParseHeader( p_vpar ) )
 250             {
 251                 /* End of sequence */
 252                 break;
 253             };
 254         }
 255     }
 256
 257     /*
 258      * Error loop
 259      */
 260     if( p_vpar->b_error )
 261     {
 262         ErrorThread( p_vpar );
 263     }
 264
 265     p_vpar->b_run = 0;
 266
 267     /* End of thread */
 268     EndThread( p_vpar );
 269 }
 270
 271 /*****************************************************************************
 272  * ErrorThread: RunThread() error loop
 273  *****************************************************************************
 274  * This function is called when an error occured during thread main's loop. The
 275  * thread can still receive feed, but must be ready to terminate as soon as
 276  * possible.
 277  *****************************************************************************/
 278 static void ErrorThread( vpar_thread_t *p_vpar )
 279 {
 280     /* We take the lock, because we are going to read/write the start/end
 281      * indexes of the decoder fifo */
 282     vlc_mutex_lock( &p_vpar->p_fifo->data_lock );
 283
 284     /* Wait until a `die' order is sent */
 285     while( !p_vpar->p_fifo->b_die )
 286     {
 287         /* Trash all received PES packets */
 288         while( !DECODER_FIFO_ISEMPTY(*p_vpar->p_fifo) )
 289         {
 290             p_vpar->p_fifo->pf_delete_pes( p_vpar->p_fifo->p_packets_mgt,
 291                                   DECODER_FIFO_START(*p_vpar->p_fifo) );
 292             DECODER_FIFO_INCSTART( *p_vpar->p_fifo );
 293         }
 294
 295         /* Waiting for the input thread to put new PES packets in the fifo */
 296         vlc_cond_wait( &p_vpar->p_fifo->data_wait, &p_vpar->p_fifo->data_lock );
 297     }
 298
 299     /* We can release the lock before leaving */
 300     vlc_mutex_unlock( &p_vpar->p_fifo->data_lock );
 301 }
 302
 303 /*****************************************************************************
 304  * EndThread: thread destruction
 305  *****************************************************************************
 306  * This function is called when the thread ends after a sucessful
 307  * initialization.
 308  *****************************************************************************/
 309 static void EndThread( vpar_thread_t *p_vpar )
 310 {
 311 #ifdef VDEC_SMP
 312     int i_dummy;
 313 #endif
 314
 315     intf_DbgMsg("vpar debug: destroying video parser thread %p\n", p_vpar);
 316
 317 #ifdef DEBUG
 318     /* Check for remaining PES packets */
 319     /* XXX?? */
 320 #endif
 321
 322 #ifdef STATS
 323     intf_Msg("vpar stats: %d loops among %d sequence(s)\n",
 324              p_vpar->c_loops, p_vpar->c_sequences);
 325     intf_Msg("vpar stats: Read %d frames/fields (I %d/P %d/B %d)\n",
 326              p_vpar->pc_pictures[I_CODING_TYPE]
 327              + p_vpar->pc_pictures[P_CODING_TYPE]
 328              + p_vpar->pc_pictures[B_CODING_TYPE],
 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     intf_Msg("vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)\n",
 333              p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 334              + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 335              + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 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     intf_Msg("vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)\n",
 340              p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 341              + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 342              + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 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 #define S   p_vpar->sequence
 347     intf_Msg("vpar info: %s stream (%dx%d), %d/1001 pi/s\n",
 348              S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 349              S.i_width, S.i_height, S.i_frame_rate);
 350     intf_Msg("vpar info: %s, %s, matrix_coeff: %d\n",
 351              S.b_progressive ? "Progressive" : "Non-progressive",
 352              S.i_scalable_mode ? "scalable" : "non-scalable",
 353              S.i_matrix_coefficients);
 354 #endif
 355
 356     /* Destroy thread structures allocated by InitThread */
 357 //    vout_DestroyStream( p_vpar->p_vout, p_vpar->i_stream );
 358     /* XXX?? */
 359
 360     /* Dispose of matrices if they have been allocated. */
 361     if( p_vpar->sequence.intra_quant.b_allocated )
 362     {
 363         free( p_vpar->sequence.intra_quant.pi_matrix );
 364     }
 365     if( p_vpar->sequence.nonintra_quant.b_allocated )
 366     {
 367         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 368     }
 369     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 370     {
 371         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 372     }
 373     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 374     {
 375         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 376     }
 377
 378 #ifdef VDEC_SMP
 379     /* Destroy vdec threads */
 380     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 381     {
 382         if( p_vpar->pp_vdec[i_dummy] != NULL )
 383             vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
 384         else
 385             break;
 386     }
 387 #else
 388     free( p_vpar->pp_vdec[0] );
 389 #endif
 390
 391     free( p_vpar );
 392
 393     intf_DbgMsg("vpar debug: EndThread(%p)\n", p_vpar);
 394 }