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 1.59 2000/12/29 12:49:29 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 <sys/types.h>                        /* on BSD, uio.h needs types.h */
  33 #include <sys/uio.h>                                            /* "input.h" */
  34 #include <errno.h>
  35 #include <string.h>
  36
  37 #ifdef STATS
  38 #  include <sys/times.h>
  39 #endif
  40
  41 #include "config.h"
  42 #include "common.h"
  43 #include "threads.h"
  44 #include "mtime.h"
  45 #include "plugins.h"
  46
  47 #include "intf_msg.h"
  48
  49 #include "stream_control.h"
  50 #include "input_ext-dec.h"
  51
  52 #include "video.h"
  53 #include "video_output.h"
  54
  55 #include "../video_decoder/vdec_idct.h"
  56 #include "../video_decoder/video_decoder.h"
  57 #include "../video_decoder/vdec_motion.h"
  58
  59 #include "../video_decoder/vpar_blocks.h"
  60 #include "../video_decoder/vpar_headers.h"
  61 #include "../video_decoder/vpar_synchro.h"
  62 #include "../video_decoder/video_parser.h"
  63 #include "../video_decoder/video_fifo.h"
  64
  65 /*
  66  * Local prototypes
  67  */
  68 static int      InitThread          ( vpar_thread_t *p_vpar );
  69 static void     RunThread           ( vpar_thread_t *p_vpar );
  70 static void     ErrorThread         ( vpar_thread_t *p_vpar );
  71 static void     EndThread           ( vpar_thread_t *p_vpar );
  72
  73 /*****************************************************************************
  74  * vpar_CreateThread: create a generic parser thread
  75  *****************************************************************************
  76  * This function creates a new video parser thread, and returns a pointer
  77  * to its description. On error, it returns NULL.
  78  * Following configuration properties are used:
  79  * XXX??
  80  *****************************************************************************/
  81 vlc_thread_t vpar_CreateThread( vdec_config_t * p_config )
  82 {
  83     vpar_thread_t *     p_vpar;
  84
  85     intf_DbgMsg( "vpar debug: creating video parser thread" );
  86
  87     /* Allocate the memory needed to store the thread's structure */
  88     if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
  89     {
  90         intf_ErrMsg( "vpar error: not enough memory "
  91                      "for vpar_CreateThread() to create the new thread");
  92         return( 0 );
  93     }
  94
  95     /*
  96      * Initialize the thread properties
  97      */
  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");
 108         free( p_vpar );
 109         return( 0 );
 110     }
 111
 112     intf_DbgMsg("vpar debug: video parser thread (%p) created", 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", 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     /* FIXME : initialize matrix_coefficients, but to what value ? */
 144
 145     /* Initialize copyright information */
 146     p_vpar->sequence.b_copyright_flag = 0;
 147     p_vpar->sequence.b_original = 0;
 148     p_vpar->sequence.i_copyright_id = 0;
 149     p_vpar->sequence.i_copyright_nb = 0;
 150
 151     p_vpar->picture.p_picture = NULL;
 152     p_vpar->picture.i_current_structure = 0;
 153
 154     /* Initialize other properties */
 155 #ifdef STATS
 156     p_vpar->c_loops = 0;
 157     p_vpar->c_sequences = 0;
 158     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 159     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 160     memset(p_vpar->pc_malformed_pictures, 0,
 161            sizeof(p_vpar->pc_malformed_pictures));
 162 #endif
 163
 164     /* Initialize video FIFO */
 165     vpar_InitFIFO( p_vpar );
 166
 167     memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
 168
 169 #ifdef VDEC_SMP
 170     /* Spawn video_decoder threads */
 171     /* FIXME: modify the number of vdecs at runtime ?? */
 172     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 173     {
 174         if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
 175         {
 176             return( 1 );
 177         }
 178     }
 179 #else
 180     /* Fake a video_decoder thread */
 181     if( (p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t )))
 182          == NULL || vdec_InitThread( p_vpar->pp_vdec[0] ) )
 183     {
 184         return( 1 );
 185     }
 186     p_vpar->pp_vdec[0]->b_die = 0;
 187     p_vpar->pp_vdec[0]->b_error = 0;
 188     p_vpar->pp_vdec[0]->p_vpar = p_vpar;
 189
 190     /* Re-nice ourself */
 191     if( nice(VDEC_NICE) == -1 )
 192     {
 193         intf_WarnMsg( 2, "vpar warning : couldn't nice() (%s)",
 194                       strerror(errno) );
 195     }
 196 #endif
 197
 198     /* Initialize lookup tables */
 199 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
 200     vpar_InitCrop( p_vpar );
 201 #endif
 202     vpar_InitMbAddrInc( p_vpar );
 203     vpar_InitDCTTables( p_vpar );
 204     vpar_InitPMBType( p_vpar );
 205     vpar_InitBMBType( p_vpar );
 206     vpar_InitDCTTables( p_vpar );
 207
 208     /*
 209      * Initialize the synchro properties
 210      */
 211     vpar_SynchroInit( p_vpar );
 212
 213     /* Mark thread as running and return */
 214     intf_DbgMsg("vpar debug: InitThread(%p) succeeded", p_vpar);
 215     return( 0 );
 216 }
 217
 218 /*****************************************************************************
 219  * RunThread: generic parser thread
 220  *****************************************************************************
 221  * Video parser thread. This function only returns when the thread is
 222  * terminated.
 223  *****************************************************************************/
 224 static void RunThread( vpar_thread_t *p_vpar )
 225 {
 226     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)", p_vpar, getpid());
 227
 228     /*
 229      * Initialize thread
 230      */
 231     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 232
 233     /*
 234      * Main loop - it is not executed if an error occured during
 235      * initialization
 236      */
 237     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 238     {
 239         /* Find the next sequence header in the stream */
 240         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 241
 242         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 243         {
 244 #ifdef STATS
 245             p_vpar->c_loops++;
 246 #endif
 247             /* Parse the next sequence, group or picture header */
 248             if( vpar_ParseHeader( p_vpar ) )
 249             {
 250                 /* End of sequence */
 251                 break;
 252             };
 253         }
 254     }
 255
 256     /*
 257      * Error loop
 258      */
 259     if( p_vpar->p_fifo->b_error )
 260     {
 261         ErrorThread( p_vpar );
 262     }
 263
 264     /* End of thread */
 265     EndThread( p_vpar );
 266 }
 267
 268 /*****************************************************************************
 269  * ErrorThread: RunThread() error loop
 270  *****************************************************************************
 271  * This function is called when an error occured during thread main's loop. The
 272  * thread can still receive feed, but must be ready to terminate as soon as
 273  * possible.
 274  *****************************************************************************/
 275 static void ErrorThread( vpar_thread_t *p_vpar )
 276 {
 277     /* We take the lock, because we are going to read/write the start/end
 278      * indexes of the decoder fifo */
 279     vlc_mutex_lock( &p_vpar->p_fifo->data_lock );
 280
 281     /* Wait until a `die' order is sent */
 282     while( !p_vpar->p_fifo->b_die )
 283     {
 284         /* Trash all received PES packets */
 285         while( !DECODER_FIFO_ISEMPTY(*p_vpar->p_fifo) )
 286         {
 287             p_vpar->p_fifo->pf_delete_pes( p_vpar->p_fifo->p_packets_mgt,
 288                                   DECODER_FIFO_START(*p_vpar->p_fifo) );
 289             DECODER_FIFO_INCSTART( *p_vpar->p_fifo );
 290         }
 291
 292         /* Waiting for the input thread to put new PES packets in the fifo */
 293         vlc_cond_wait( &p_vpar->p_fifo->data_wait, &p_vpar->p_fifo->data_lock );
 294     }
 295
 296     /* We can release the lock before leaving */
 297     vlc_mutex_unlock( &p_vpar->p_fifo->data_lock );
 298 }
 299
 300 /*****************************************************************************
 301  * EndThread: thread destruction
 302  *****************************************************************************
 303  * This function is called when the thread ends after a sucessful
 304  * initialization.
 305  *****************************************************************************/
 306 static void EndThread( vpar_thread_t *p_vpar )
 307 {
 308 #ifdef VDEC_SMP
 309     int i_dummy;
 310 #endif
 311
 312     intf_DbgMsg("vpar debug: destroying video parser thread %p", p_vpar);
 313
 314 #ifdef STATS
 315     intf_Msg("vpar stats: %d loops among %d sequence(s)",
 316              p_vpar->c_loops, p_vpar->c_sequences);
 317
 318     {
 319         struct tms cpu_usage;
 320         times( &cpu_usage );
 321
 322         intf_Msg("vpar stats: cpu usage (user: %d, system: %d)",
 323                  cpu_usage.tms_utime, cpu_usage.tms_stime);
 324     }
 325
 326     intf_Msg("vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 327              p_vpar->pc_pictures[I_CODING_TYPE]
 328              + p_vpar->pc_pictures[P_CODING_TYPE]
 329              + p_vpar->pc_pictures[B_CODING_TYPE],
 330              p_vpar->pc_pictures[I_CODING_TYPE],
 331              p_vpar->pc_pictures[P_CODING_TYPE],
 332              p_vpar->pc_pictures[B_CODING_TYPE]);
 333     intf_Msg("vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 334              p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 335              + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 336              + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 337              p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 338              p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 339              p_vpar->pc_decoded_pictures[B_CODING_TYPE]);
 340     intf_Msg("vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 341              p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 342              + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 343              + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 344              p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 345              p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 346              p_vpar->pc_malformed_pictures[B_CODING_TYPE]);
 347 #define S   p_vpar->sequence
 348     intf_Msg("vpar info: %s stream (%dx%d), %d pi/s",
 349              S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 350              S.i_width, S.i_height, S.i_frame_rate/1001);
 351     intf_Msg("vpar info: %s, %s, matrix_coeff: %d",
 352              S.b_progressive ? "Progressive" : "Non-progressive",
 353              S.i_scalable_mode ? "scalable" : "non-scalable",
 354              S.i_matrix_coefficients);
 355 #endif
 356
 357     /* Dispose of matrices if they have been allocated. */
 358     if( p_vpar->sequence.intra_quant.b_allocated )
 359     {
 360         free( p_vpar->sequence.intra_quant.pi_matrix );
 361     }
 362     if( p_vpar->sequence.nonintra_quant.b_allocated )
 363     {
 364         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 365     }
 366     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 367     {
 368         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 369     }
 370     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 371     {
 372         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 373     }
 374
 375 #ifdef VDEC_SMP
 376     /* Destroy vdec threads */
 377     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 378     {
 379         if( p_vpar->pp_vdec[i_dummy] != NULL )
 380             vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
 381         else
 382             break;
 383     }
 384 #else
 385     free( p_vpar->pp_vdec[0] );
 386 #endif
 387
 388     free( p_vpar->p_config );
 389     free( p_vpar );
 390
 391     intf_DbgMsg("vpar debug: EndThread(%p)", p_vpar);
 392 }