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 1.64 2001/01/10 19:22:11 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
  45 #include "intf_msg.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 "../video_decoder/vdec_idct.h"
  54 #include "../video_decoder/video_decoder.h"
  55 #include "../video_decoder/vdec_motion.h"
  56
  57 #include "../video_decoder/vpar_blocks.h"
  58 #include "../video_decoder/vpar_headers.h"
  59 #include "../video_decoder/vpar_synchro.h"
  60 #include "../video_decoder/video_parser.h"
  61 #include "../video_decoder/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 static void     BitstreamCallback   ( bit_stream_t *p_bit_stream );
  71
  72 /*****************************************************************************
  73  * vpar_CreateThread: create a generic parser thread
  74  *****************************************************************************
  75  * This function creates a new video parser thread, and returns a pointer
  76  * to its description. On error, it returns NULL.
  77  *****************************************************************************/
  78 vlc_thread_t vpar_CreateThread( vdec_config_t * p_config )
  79 {
  80     vpar_thread_t *     p_vpar;
  81
  82     intf_DbgMsg( "vpar debug: creating video parser thread" );
  83
  84     /* Allocate the memory needed to store the thread's structure */
  85     if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
  86     {
  87         intf_ErrMsg( "vpar error: not enough memory "
  88                      "for vpar_CreateThread() to create the new thread");
  89         return( 0 );
  90     }
  91
  92     /*
  93      * Initialize the thread properties
  94      */
  95     p_vpar->p_fifo = p_config->decoder_config.p_decoder_fifo;
  96     p_vpar->p_config = p_config;
  97
  98     p_vpar->p_vout = p_config->p_vout;
  99
 100     /* Spawn the video parser thread */
 101     if ( vlc_thread_create( &p_vpar->thread_id, "video parser",
 102                             (vlc_thread_func_t)RunThread, (void *)p_vpar ) )
 103     {
 104         intf_ErrMsg("vpar error: can't spawn video parser thread");
 105         free( p_vpar );
 106         return( 0 );
 107     }
 108
 109     intf_DbgMsg("vpar debug: video parser thread (%p) created", p_vpar);
 110     return( p_vpar->thread_id );
 111 }
 112
 113 /* following functions are local */
 114
 115 /*****************************************************************************
 116  * InitThread: initialize vpar output thread
 117  *****************************************************************************
 118  * This function is called from RunThread and performs the second step of the
 119  * initialization. It returns 0 on success. Note that the thread's flag are not
 120  * modified inside this function.
 121  *****************************************************************************/
 122 static int InitThread( vpar_thread_t *p_vpar )
 123 {
 124 #ifdef VDEC_SMP
 125     int i_dummy;
 126 #endif
 127
 128     intf_DbgMsg("vpar debug: initializing video parser thread %p", p_vpar);
 129
 130     p_vpar->p_config->decoder_config.pf_init_bit_stream( &p_vpar->bit_stream,
 131         p_vpar->p_config->decoder_config.p_decoder_fifo );
 132
 133     /* Initialize parsing data */
 134     p_vpar->sequence.p_forward = NULL;
 135     p_vpar->sequence.p_backward = NULL;
 136     p_vpar->sequence.intra_quant.b_allocated = 0;
 137     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 138     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 139     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 140     /* FIXME : initialize matrix_coefficients, but to what value ? */
 141
 142     /* Initialize copyright information */
 143     p_vpar->sequence.b_copyright_flag = 0;
 144     p_vpar->sequence.b_original = 0;
 145     p_vpar->sequence.i_copyright_id = 0;
 146     p_vpar->sequence.i_copyright_nb = 0;
 147
 148     p_vpar->picture.p_picture = NULL;
 149     p_vpar->picture.i_current_structure = 0;
 150
 151     /* Initialize other properties */
 152 #ifdef STATS
 153     p_vpar->c_loops = 0;
 154     p_vpar->c_sequences = 0;
 155     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 156     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 157     memset(p_vpar->pc_malformed_pictures, 0,
 158            sizeof(p_vpar->pc_malformed_pictures));
 159 #endif
 160
 161     /* Initialize video FIFO */
 162     vpar_InitFIFO( p_vpar );
 163
 164     memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
 165
 166 #ifdef VDEC_SMP
 167     /* Spawn video_decoder threads */
 168     /* FIXME: modify the number of vdecs at runtime ?? */
 169     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 170     {
 171         if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
 172         {
 173             return( 1 );
 174         }
 175     }
 176 #else
 177     /* Fake a video_decoder thread */
 178     if( (p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t )))
 179          == NULL || vdec_InitThread( p_vpar->pp_vdec[0] ) )
 180     {
 181         return( 1 );
 182     }
 183     p_vpar->pp_vdec[0]->b_die = 0;
 184     p_vpar->pp_vdec[0]->b_error = 0;
 185     p_vpar->pp_vdec[0]->p_vpar = p_vpar;
 186
 187     /* Re-nice ourself */
 188     if( nice(VDEC_NICE) == -1 )
 189     {
 190         intf_WarnMsg( 2, "vpar warning : couldn't nice() (%s)",
 191                       strerror(errno) );
 192     }
 193 #endif
 194
 195     /* Initialize lookup tables */
 196 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
 197     vpar_InitCrop( p_vpar );
 198 #endif
 199     vpar_InitMbAddrInc( p_vpar );
 200     vpar_InitDCTTables( p_vpar );
 201     vpar_InitPMBType( p_vpar );
 202     vpar_InitBMBType( p_vpar );
 203     vpar_InitDCTTables( p_vpar );
 204
 205     /*
 206      * Initialize the synchro properties
 207      */
 208     vpar_SynchroInit( p_vpar );
 209
 210     /* Mark thread as running and return */
 211     intf_DbgMsg("vpar debug: InitThread(%p) succeeded", p_vpar);
 212     return( 0 );
 213 }
 214
 215 /*****************************************************************************
 216  * RunThread: generic parser thread
 217  *****************************************************************************
 218  * Video parser thread. This function only returns when the thread is
 219  * terminated.
 220  *****************************************************************************/
 221 static void RunThread( vpar_thread_t *p_vpar )
 222 {
 223     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)", p_vpar, getpid());
 224
 225     /*
 226      * Initialize thread
 227      */
 228     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 229
 230     /*
 231      * Main loop - it is not executed if an error occured during
 232      * initialization
 233      */
 234     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 235     {
 236         /* Find the next sequence header in the stream */
 237         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 238
 239         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 240         {
 241 #ifdef STATS
 242             p_vpar->c_loops++;
 243 #endif
 244             /* Parse the next sequence, group or picture header */
 245             if( vpar_ParseHeader( p_vpar ) )
 246             {
 247                 /* End of sequence */
 248                 break;
 249             };
 250         }
 251     }
 252
 253     /*
 254      * Error loop
 255      */
 256     if( p_vpar->p_fifo->b_error )
 257     {
 258         ErrorThread( p_vpar );
 259     }
 260
 261     /* End of thread */
 262     EndThread( p_vpar );
 263 }
 264
 265 /*****************************************************************************
 266  * ErrorThread: RunThread() error loop
 267  *****************************************************************************
 268  * This function is called when an error occured during thread main's loop. The
 269  * thread can still receive feed, but must be ready to terminate as soon as
 270  * possible.
 271  *****************************************************************************/
 272 static void ErrorThread( vpar_thread_t *p_vpar )
 273 {
 274     /* We take the lock, because we are going to read/write the start/end
 275      * indexes of the decoder fifo */
 276     vlc_mutex_lock( &p_vpar->p_fifo->data_lock );
 277
 278     /* Wait until a `die' order is sent */
 279     while( !p_vpar->p_fifo->b_die )
 280     {
 281         /* Trash all received PES packets */
 282         while( !DECODER_FIFO_ISEMPTY(*p_vpar->p_fifo) )
 283         {
 284             p_vpar->p_fifo->pf_delete_pes( p_vpar->p_fifo->p_packets_mgt,
 285                                   DECODER_FIFO_START(*p_vpar->p_fifo) );
 286             DECODER_FIFO_INCSTART( *p_vpar->p_fifo );
 287         }
 288
 289         /* Waiting for the input thread to put new PES packets in the fifo */
 290         vlc_cond_wait( &p_vpar->p_fifo->data_wait, &p_vpar->p_fifo->data_lock );
 291     }
 292
 293     /* We can release the lock before leaving */
 294     vlc_mutex_unlock( &p_vpar->p_fifo->data_lock );
 295 }
 296
 297 /*****************************************************************************
 298  * EndThread: thread destruction
 299  *****************************************************************************
 300  * This function is called when the thread ends after a sucessful
 301  * initialization.
 302  *****************************************************************************/
 303 static void EndThread( vpar_thread_t *p_vpar )
 304 {
 305 #ifdef VDEC_SMP
 306     int i_dummy;
 307 #endif
 308
 309     intf_DbgMsg("vpar debug: destroying video parser thread %p", p_vpar);
 310
 311 #ifdef STATS
 312     intf_Msg("vpar stats: %d loops among %d sequence(s)",
 313              p_vpar->c_loops, p_vpar->c_sequences);
 314
 315     {
 316         struct tms cpu_usage;
 317         times( &cpu_usage );
 318
 319         intf_Msg("vpar stats: cpu usage (user: %d, system: %d)",
 320                  cpu_usage.tms_utime, cpu_usage.tms_stime);
 321     }
 322
 323     intf_Msg("vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 324              p_vpar->pc_pictures[I_CODING_TYPE]
 325              + p_vpar->pc_pictures[P_CODING_TYPE]
 326              + p_vpar->pc_pictures[B_CODING_TYPE],
 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     intf_Msg("vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 331              p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 332              + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 333              + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 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     intf_Msg("vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 338              p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 339              + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 340              + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 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 #define S   p_vpar->sequence
 345     intf_Msg("vpar info: %s stream (%dx%d), %d.%d pi/s",
 346              S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 347              S.i_width, S.i_height, S.i_frame_rate/1001, S.i_frame_rate % 1001);
 348     intf_Msg("vpar info: %s, %s, matrix_coeff: %d",
 349              S.b_progressive ? "Progressive" : "Non-progressive",
 350              S.i_scalable_mode ? "scalable" : "non-scalable",
 351              S.i_matrix_coefficients);
 352 #endif
 353
 354     /* Dispose of matrices if they have been allocated. */
 355     if( p_vpar->sequence.intra_quant.b_allocated )
 356     {
 357         free( p_vpar->sequence.intra_quant.pi_matrix );
 358     }
 359     if( p_vpar->sequence.nonintra_quant.b_allocated )
 360     {
 361         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 362     }
 363     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 364     {
 365         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 366     }
 367     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 368     {
 369         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 370     }
 371
 372 #ifdef VDEC_SMP
 373     /* Destroy vdec threads */
 374     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 375     {
 376         if( p_vpar->pp_vdec[i_dummy] != NULL )
 377             vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
 378         else
 379             break;
 380     }
 381 #else
 382     free( p_vpar->pp_vdec[0] );
 383 #endif
 384
 385     free( p_vpar->p_config );
 386
 387 #ifdef VDEC_SMP
 388     /* Destroy lock and cond */
 389     vlc_mutex_destroy( &(p_vpar->vbuffer.lock) );
 390     vlc_cond_destroy( &(p_vpar->vfifo.wait) );
 391     vlc_mutex_destroy( &(p_vpar->vfifo.lock) );
 392 #endif
 393
 394     vlc_mutex_destroy( &(p_vpar->synchro.fifo_lock) );
 395
 396     free( p_vpar );
 397
 398     intf_DbgMsg("vpar debug: EndThread(%p)", p_vpar);
 399 }
 400
 401 /*****************************************************************************
 402  * BitstreamCallback: Import parameters from the new data/PES packet
 403  *****************************************************************************
 404  * This function is called when the thread ends after a sucessful
 405  * initialization.
 406  *****************************************************************************/
 407 static void     BitstreamCallback   ( bit_stream_t *p_bit_stream );