git.sesse.net Git - vlc/blob - src/video_decoder/video_parser.c

   1 /*****************************************************************************
   2  * video_parser.c : video parser thread
   3  *****************************************************************************
   4  * Copyright (C) 1999, 2000 VideoLAN
   5  * $Id: video_parser.c,v 1.4 2001/08/22 17:21:45 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
  32 #ifdef HAVE_UNISTD_H
  33 #include <unistd.h>                                              /* getpid() */
  34 #endif
  35
  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 "modules.h"
  48
  49 #include "intf_msg.h"
  50
  51 #include "stream_control.h"
  52 #include "input_ext-dec.h"
  53
  54 #include "video.h"
  55 #include "video_output.h"
  56
  57 #include "vdec_ext-plugins.h"
  58 #include "vpar_pool.h"
  59 #include "video_parser.h"
  60
  61 /*
  62  * Local prototypes
  63  */
  64 static int      InitThread          ( vpar_thread_t * );
  65 static void     RunThread           ( vpar_thread_t * );
  66 static void     ErrorThread         ( vpar_thread_t * );
  67 static void     EndThread           ( vpar_thread_t * );
  68 static void     BitstreamCallback   ( bit_stream_t *, boolean_t );
  69
  70 /*****************************************************************************
  71  * vpar_CreateThread: create a generic parser thread
  72  *****************************************************************************
  73  * This function creates a new video parser thread, and returns a pointer
  74  * to its description. On error, it returns NULL.
  75  *****************************************************************************/
  76 vlc_thread_t vpar_CreateThread( vdec_config_t * p_config )
  77 {
  78     vpar_thread_t *     p_vpar;
  79
  80     intf_DbgMsg( "vpar debug: creating video parser thread" );
  81
  82     /* Allocate the memory needed to store the thread's structure */
  83     if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
  84     {
  85         intf_ErrMsg( "vpar error: not enough memory "
  86                      "for vpar_CreateThread() to create the new thread");
  87         return( 0 );
  88     }
  89
  90     /*
  91      * Initialize the thread properties
  92      */
  93     p_vpar->p_fifo = p_config->decoder_config.p_decoder_fifo;
  94     p_vpar->p_config = p_config;
  95     p_vpar->p_vout = NULL;
  96
  97     /* Spawn the video parser thread */
  98     if ( vlc_thread_create( &p_vpar->thread_id, "video parser",
  99                             (vlc_thread_func_t)RunThread, (void *)p_vpar ) )
 100     {
 101         intf_ErrMsg("vpar error: can't spawn video parser thread");
 102         module_Unneed( p_vpar->p_idct_module );
 103         module_Unneed( p_vpar->p_motion_module );
 104         free( p_vpar );
 105         return( 0 );
 106     }
 107
 108     intf_DbgMsg("vpar debug: video parser thread (%p) created", p_vpar);
 109     return( p_vpar->thread_id );
 110 }
 111
 112 /* following functions are local */
 113
 114 /*****************************************************************************
 115  * InitThread: initialize vpar output thread
 116  *****************************************************************************
 117  * This function is called from RunThread and performs the second step of the
 118  * initialization. It returns 0 on success. Note that the thread's flag are not
 119  * modified inside this function.
 120  *****************************************************************************/
 121 static int InitThread( vpar_thread_t *p_vpar )
 122 {
 123     intf_DbgMsg("vpar debug: initializing video parser thread %p", p_vpar);
 124
 125     /*
 126      * Choose the best motion compensation module
 127      */
 128     p_vpar->p_motion_module = module_Need( MODULE_CAPABILITY_MOTION, NULL );
 129
 130     if( p_vpar->p_motion_module == NULL )
 131     {
 132         intf_ErrMsg( "vpar error: no suitable motion compensation module" );
 133         free( p_vpar );
 134         return( 0 );
 135     }
 136
 137 #define f ( p_vpar->p_motion_module->p_functions->motion.functions.motion )
 138     memcpy( p_vpar->pool.ppppf_motion, f.ppppf_motion, sizeof(void *) * 16 );
 139 #undef f
 140
 141     /*
 142      * Choose the best IDCT module
 143      */
 144     p_vpar->p_idct_module = module_Need( MODULE_CAPABILITY_IDCT, NULL );
 145
 146     if( p_vpar->p_idct_module == NULL )
 147     {
 148         intf_ErrMsg( "vpar error: no suitable IDCT module" );
 149         module_Unneed( p_vpar->p_motion_module );
 150         free( p_vpar );
 151         return( 0 );
 152     }
 153
 154 #define f p_vpar->p_idct_module->p_functions->idct.functions.idct
 155     p_vpar->pool.pf_idct_init   = f.pf_idct_init;
 156     p_vpar->pf_sparse_idct      = f.pf_sparse_idct;
 157     p_vpar->pf_idct             = f.pf_idct;
 158     p_vpar->pf_norm_scan        = f.pf_norm_scan;
 159     p_vpar->pool.pf_decode_init = f.pf_decode_init;
 160     p_vpar->pool.pf_addblock    = f.pf_addblock;
 161     p_vpar->pool.pf_copyblock   = f.pf_copyblock;
 162 #undef f
 163
 164     /* Initialize input bitstream */
 165     p_vpar->p_config->decoder_config.pf_init_bit_stream( &p_vpar->bit_stream,
 166         p_vpar->p_config->decoder_config.p_decoder_fifo, BitstreamCallback,
 167         (void *)p_vpar );
 168
 169     /* Initialize parsing data */
 170     p_vpar->sequence.p_forward = NULL;
 171     p_vpar->sequence.p_backward = NULL;
 172     p_vpar->sequence.intra_quant.b_allocated = 0;
 173     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 174     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 175     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 176     p_vpar->sequence.i_matrix_coefficients = 1;
 177     p_vpar->sequence.next_pts = p_vpar->sequence.next_dts = 0;
 178     p_vpar->sequence.b_expect_discontinuity = 0;
 179
 180     /* Initialize copyright information */
 181     p_vpar->sequence.b_copyright_flag = 0;
 182     p_vpar->sequence.b_original = 0;
 183     p_vpar->sequence.i_copyright_id = 0;
 184     p_vpar->sequence.i_copyright_nb = 0;
 185
 186     p_vpar->picture.p_picture = NULL;
 187     p_vpar->picture.i_current_structure = 0;
 188
 189     /* Initialize other properties */
 190 #ifdef STATS
 191     p_vpar->c_loops = 0;
 192     p_vpar->c_sequences = 0;
 193     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 194     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 195     memset(p_vpar->pc_malformed_pictures, 0,
 196            sizeof(p_vpar->pc_malformed_pictures));
 197 #endif
 198     vpar_InitScanTable( p_vpar );
 199
 200     /*
 201      * Initialize the synchro properties
 202      */
 203     vpar_SynchroInit( p_vpar );
 204
 205     /* Spawn optional video decoder threads */
 206     vpar_InitPool( p_vpar );
 207
 208     /* Mark thread as running and return */
 209     intf_DbgMsg("vpar debug: InitThread(%p) succeeded", p_vpar);
 210     return( 0 );
 211 }
 212
 213 /*****************************************************************************
 214  * RunThread: generic parser thread
 215  *****************************************************************************
 216  * Video parser thread. This function only returns when the thread is
 217  * terminated.
 218  *****************************************************************************/
 219 static void RunThread( vpar_thread_t *p_vpar )
 220 {
 221     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)", p_vpar, getpid());
 222
 223     /*
 224      * Initialize thread
 225      */
 226     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 227
 228     /*
 229      * Main loop - it is not executed if an error occured during
 230      * initialization
 231      */
 232     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 233     {
 234         /* Find the next sequence header in the stream */
 235         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 236
 237         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 238         {
 239 #ifdef STATS
 240             p_vpar->c_loops++;
 241 #endif
 242             /* Parse the next sequence, group or picture header */
 243             if( vpar_ParseHeader( p_vpar ) )
 244             {
 245                 /* End of sequence */
 246                 break;
 247             }
 248         }
 249     }
 250
 251     /*
 252      * Error loop
 253      */
 254     if( p_vpar->p_fifo->b_error )
 255     {
 256         ErrorThread( p_vpar );
 257     }
 258
 259     /* End of thread */
 260     EndThread( p_vpar );
 261 }
 262
 263 /*****************************************************************************
 264  * ErrorThread: RunThread() error loop
 265  *****************************************************************************
 266  * This function is called when an error occured during thread main's loop. The
 267  * thread can still receive feed, but must be ready to terminate as soon as
 268  * possible.
 269  *****************************************************************************/
 270 static void ErrorThread( vpar_thread_t *p_vpar )
 271 {
 272     /* We take the lock, because we are going to read/write the start/end
 273      * indexes of the decoder fifo */
 274     vlc_mutex_lock( &p_vpar->p_fifo->data_lock );
 275
 276     /* Wait until a `die' order is sent */
 277     while( !p_vpar->p_fifo->b_die )
 278     {
 279         /* Trash all received PES packets */
 280         while( !DECODER_FIFO_ISEMPTY(*p_vpar->p_fifo) )
 281         {
 282             p_vpar->p_fifo->pf_delete_pes( p_vpar->p_fifo->p_packets_mgt,
 283                                   DECODER_FIFO_START(*p_vpar->p_fifo) );
 284             DECODER_FIFO_INCSTART( *p_vpar->p_fifo );
 285         }
 286
 287         /* Waiting for the input thread to put new PES packets in the fifo */
 288         vlc_cond_wait( &p_vpar->p_fifo->data_wait, &p_vpar->p_fifo->data_lock );
 289     }
 290
 291     /* We can release the lock before leaving */
 292     vlc_mutex_unlock( &p_vpar->p_fifo->data_lock );
 293 }
 294
 295 /*****************************************************************************
 296  * EndThread: thread destruction
 297  *****************************************************************************
 298  * This function is called when the thread ends after a sucessful
 299  * initialization.
 300  *****************************************************************************/
 301 static void EndThread( vpar_thread_t *p_vpar )
 302 {
 303     intf_DbgMsg("vpar debug: destroying video parser thread %p", p_vpar);
 304
 305     /* Release used video buffers. */
 306     if( p_vpar->sequence.p_forward != NULL )
 307     {
 308         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_forward );
 309     }
 310     if( p_vpar->sequence.p_backward != NULL )
 311     {
 312         vout_DatePicture( p_vpar->p_vout, p_vpar->sequence.p_backward,
 313                           vpar_SynchroDate( p_vpar ) );
 314         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_backward );
 315     }
 316     if( p_vpar->picture.p_picture != NULL )
 317     {
 318         vout_DestroyPicture( p_vpar->p_vout, p_vpar->picture.p_picture );
 319     }
 320
 321 #ifdef STATS
 322     intf_Msg("vpar stats: %d loops among %d sequence(s)",
 323              p_vpar->c_loops, p_vpar->c_sequences);
 324
 325     {
 326         struct tms cpu_usage;
 327         times( &cpu_usage );
 328
 329         intf_Msg("vpar stats: cpu usage (user: %d, system: %d)",
 330                  cpu_usage.tms_utime, cpu_usage.tms_stime);
 331     }
 332
 333     intf_Msg("vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 334              p_vpar->pc_pictures[I_CODING_TYPE]
 335              + p_vpar->pc_pictures[P_CODING_TYPE]
 336              + p_vpar->pc_pictures[B_CODING_TYPE],
 337              p_vpar->pc_pictures[I_CODING_TYPE],
 338              p_vpar->pc_pictures[P_CODING_TYPE],
 339              p_vpar->pc_pictures[B_CODING_TYPE]);
 340     intf_Msg("vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 341              p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 342              + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 343              + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 344              p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 345              p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 346              p_vpar->pc_decoded_pictures[B_CODING_TYPE]);
 347     intf_Msg("vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 348              p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 349              + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 350              + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 351              p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 352              p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 353              p_vpar->pc_malformed_pictures[B_CODING_TYPE]);
 354 #define S   p_vpar->sequence
 355     intf_Msg("vpar info: %s stream (%dx%d), %d.%d pi/s",
 356              S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 357              S.i_width, S.i_height, S.i_frame_rate/1001, S.i_frame_rate % 1001);
 358     intf_Msg("vpar info: %s, %s, matrix_coeff: %d",
 359              S.b_progressive ? "Progressive" : "Non-progressive",
 360              S.i_scalable_mode ? "scalable" : "non-scalable",
 361              S.i_matrix_coefficients);
 362 #endif
 363
 364     /* Dispose of matrices if they have been allocated. */
 365     if( p_vpar->sequence.intra_quant.b_allocated )
 366     {
 367         free( p_vpar->sequence.intra_quant.pi_matrix );
 368     }
 369     if( p_vpar->sequence.nonintra_quant.b_allocated )
 370     {
 371         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 372     }
 373     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 374     {
 375         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 376     }
 377     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 378     {
 379         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 380     }
 381
 382     vpar_EndPool( p_vpar );
 383
 384     free( p_vpar->p_config );
 385
 386     module_Unneed( p_vpar->p_idct_module );
 387     module_Unneed( p_vpar->p_motion_module );
 388
 389     free( p_vpar );
 390
 391     intf_DbgMsg("vpar debug: EndThread(%p)", p_vpar);
 392 }
 393
 394 /*****************************************************************************
 395  * BitstreamCallback: Import parameters from the new data/PES packet
 396  *****************************************************************************
 397  * This function is called by input's NextDataPacket.
 398  *****************************************************************************/
 399 static void BitstreamCallback ( bit_stream_t * p_bit_stream,
 400                                 boolean_t b_new_pes )
 401 {
 402     vpar_thread_t * p_vpar = (vpar_thread_t *)p_bit_stream->p_callback_arg;
 403
 404     if( b_new_pes )
 405     {
 406         p_vpar->sequence.next_pts =
 407             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_pts;
 408         p_vpar->sequence.next_dts =
 409             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_dts;
 410         p_vpar->sequence.i_current_rate =
 411             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_rate;
 412
 413         if( DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->b_discontinuity )
 414         {
 415 #ifdef TRACE_VPAR
 416             intf_DbgMsg( "Discontinuity in BitstreamCallback" );
 417 #endif
 418             /* Escape the current picture and reset the picture predictors. */
 419             p_vpar->sequence.b_expect_discontinuity = 1;
 420             p_vpar->picture.b_error = 1;
 421         }
 422     }
 423
 424     if( p_bit_stream->p_data->b_discard_payload )
 425     {
 426 #ifdef TRACE_VPAR
 427         intf_DbgMsg( "Discard payload in BitstreamCallback" );
 428 #endif
 429         /* 1 packet messed up, trash the slice. */
 430         p_vpar->picture.b_error = 1;
 431     }
 432 }