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 1.8 2001/10/03 13:14:05 sam 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 HAVE_SYS_TIMES_H
  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 #include "main.h"
  62
  63 /*
  64  * Local prototypes
  65  */
  66 static int      InitThread          ( vpar_thread_t * );
  67 static void     RunThread           ( vpar_thread_t * );
  68 static void     ErrorThread         ( vpar_thread_t * );
  69 static void     EndThread           ( vpar_thread_t * );
  70 static void     BitstreamCallback   ( bit_stream_t *, boolean_t );
  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     p_vpar->p_vout = NULL;
  98
  99     /* Spawn the video parser thread */
 100     if ( vlc_thread_create( &p_vpar->thread_id, "video parser",
 101                             (vlc_thread_func_t)RunThread, (void *)p_vpar ) )
 102     {
 103         intf_ErrMsg("vpar error: can't spawn video parser thread");
 104         module_Unneed( p_vpar->p_idct_module );
 105         module_Unneed( p_vpar->p_motion_module );
 106         free( p_vpar );
 107         return( 0 );
 108     }
 109
 110     intf_DbgMsg("vpar debug: video parser thread (%p) created", p_vpar);
 111     return( p_vpar->thread_id );
 112 }
 113
 114 /* following functions are local */
 115
 116 /*****************************************************************************
 117  * InitThread: initialize vpar output thread
 118  *****************************************************************************
 119  * This function is called from RunThread and performs the second step of the
 120  * initialization. It returns 0 on success. Note that the thread's flag are not
 121  * modified inside this function.
 122  *****************************************************************************/
 123 static int InitThread( vpar_thread_t *p_vpar )
 124 {
 125     intf_DbgMsg("vpar debug: initializing video parser thread %p", p_vpar);
 126
 127     /*
 128      * Choose the best motion compensation module
 129      */
 130     p_vpar->p_motion_module = module_Need( MODULE_CAPABILITY_MOTION, NULL );
 131
 132     if( p_vpar->p_motion_module == NULL )
 133     {
 134         intf_ErrMsg( "vpar error: no suitable motion compensation module" );
 135         free( p_vpar );
 136         return( 0 );
 137     }
 138
 139 #define f ( p_vpar->p_motion_module->p_functions->motion.functions.motion )
 140     memcpy( p_vpar->pool.ppppf_motion, f.ppppf_motion, sizeof(void *) * 16 );
 141 #undef f
 142
 143     /*
 144      * Choose the best IDCT module
 145      */
 146     p_vpar->p_idct_module = module_Need( MODULE_CAPABILITY_IDCT, NULL );
 147
 148     if( p_vpar->p_idct_module == NULL )
 149     {
 150         intf_ErrMsg( "vpar error: no suitable IDCT module" );
 151         module_Unneed( p_vpar->p_motion_module );
 152         free( p_vpar );
 153         return( 0 );
 154     }
 155
 156 #define f p_vpar->p_idct_module->p_functions->idct.functions.idct
 157     p_vpar->pool.pf_idct_init   = f.pf_idct_init;
 158     p_vpar->pf_sparse_idct_add  = f.pf_sparse_idct_add;
 159     p_vpar->pf_idct_add         = f.pf_idct_add;
 160     p_vpar->pf_sparse_idct_copy = f.pf_sparse_idct_copy;
 161     p_vpar->pf_idct_copy        = f.pf_idct_copy;
 162     p_vpar->pf_norm_scan        = f.pf_norm_scan;
 163 #undef f
 164
 165     /* Initialize input bitstream */
 166     p_vpar->p_config->decoder_config.pf_init_bit_stream( &p_vpar->bit_stream,
 167         p_vpar->p_config->decoder_config.p_decoder_fifo, BitstreamCallback,
 168         (void *)p_vpar );
 169
 170     /* Initialize parsing data */
 171     p_vpar->sequence.p_forward = NULL;
 172     p_vpar->sequence.p_backward = NULL;
 173     p_vpar->sequence.intra_quant.b_allocated = 0;
 174     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 175     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 176     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 177     p_vpar->sequence.i_matrix_coefficients = 1;
 178     p_vpar->sequence.next_pts = p_vpar->sequence.next_dts = 0;
 179     p_vpar->sequence.b_expect_discontinuity = 0;
 180
 181     /* Initialize copyright information */
 182     p_vpar->sequence.b_copyright_flag = 0;
 183     p_vpar->sequence.b_original = 0;
 184     p_vpar->sequence.i_copyright_id = 0;
 185     p_vpar->sequence.i_copyright_nb = 0;
 186
 187     p_vpar->picture.p_picture = NULL;
 188     p_vpar->picture.i_current_structure = 0;
 189
 190     /* Initialize other properties */
 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     vpar_InitScanTable( p_vpar );
 198
 199     /*
 200      * Initialize the synchro properties
 201      */
 202     vpar_SynchroInit( p_vpar );
 203
 204     /* Spawn optional video decoder threads */
 205     vpar_InitPool( p_vpar );
 206
 207     /* Mark thread as running and return */
 208     intf_DbgMsg("vpar debug: InitThread(%p) succeeded", p_vpar);
 209     return( 0 );
 210 }
 211
 212 /*****************************************************************************
 213  * RunThread: generic parser thread
 214  *****************************************************************************
 215  * Video parser thread. This function only returns when the thread is
 216  * terminated.
 217  *****************************************************************************/
 218 static void RunThread( vpar_thread_t *p_vpar )
 219 {
 220     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)", p_vpar, getpid());
 221
 222     /*
 223      * Initialize thread
 224      */
 225     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 226
 227     /*
 228      * Main loop - it is not executed if an error occured during
 229      * initialization
 230      */
 231     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 232     {
 233         /* Find the next sequence header in the stream */
 234         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 235
 236         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 237         {
 238             p_vpar->c_loops++;
 239
 240             /* Parse the next sequence, group or picture header */
 241             if( vpar_ParseHeader( p_vpar ) )
 242             {
 243                 /* End of sequence */
 244                 break;
 245             }
 246         }
 247     }
 248
 249     /*
 250      * Error loop
 251      */
 252     if( p_vpar->p_fifo->b_error )
 253     {
 254         ErrorThread( p_vpar );
 255     }
 256
 257     /* End of thread */
 258     EndThread( p_vpar );
 259 }
 260
 261 /*****************************************************************************
 262  * ErrorThread: RunThread() error loop
 263  *****************************************************************************
 264  * This function is called when an error occured during thread main's loop. The
 265  * thread can still receive feed, but must be ready to terminate as soon as
 266  * possible.
 267  *****************************************************************************/
 268 static void ErrorThread( vpar_thread_t *p_vpar )
 269 {
 270     /* We take the lock, because we are going to read/write the start/end
 271      * indexes of the decoder fifo */
 272     vlc_mutex_lock( &p_vpar->p_fifo->data_lock );
 273
 274     /* Wait until a `die' order is sent */
 275     while( !p_vpar->p_fifo->b_die )
 276     {
 277         /* Trash all received PES packets */
 278         while( !DECODER_FIFO_ISEMPTY(*p_vpar->p_fifo) )
 279         {
 280             p_vpar->p_fifo->pf_delete_pes( p_vpar->p_fifo->p_packets_mgt,
 281                                   DECODER_FIFO_START(*p_vpar->p_fifo) );
 282             DECODER_FIFO_INCSTART( *p_vpar->p_fifo );
 283         }
 284
 285         /* Waiting for the input thread to put new PES packets in the fifo */
 286         vlc_cond_wait( &p_vpar->p_fifo->data_wait, &p_vpar->p_fifo->data_lock );
 287     }
 288
 289     /* We can release the lock before leaving */
 290     vlc_mutex_unlock( &p_vpar->p_fifo->data_lock );
 291 }
 292
 293 /*****************************************************************************
 294  * EndThread: thread destruction
 295  *****************************************************************************
 296  * This function is called when the thread ends after a sucessful
 297  * initialization.
 298  *****************************************************************************/
 299 static void EndThread( vpar_thread_t *p_vpar )
 300 {
 301     intf_DbgMsg("vpar debug: destroying video parser thread %p", p_vpar);
 302
 303     /* Release used video buffers. */
 304     if( p_vpar->sequence.p_forward != NULL )
 305     {
 306         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_forward );
 307     }
 308     if( p_vpar->sequence.p_backward != NULL )
 309     {
 310         vout_DatePicture( p_vpar->p_vout, p_vpar->sequence.p_backward,
 311                           vpar_SynchroDate( p_vpar ) );
 312         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_backward );
 313     }
 314     if( p_vpar->picture.p_picture != NULL )
 315     {
 316         vout_DestroyPicture( p_vpar->p_vout, p_vpar->picture.p_picture );
 317     }
 318
 319     if( p_main->b_stats )
 320     {
 321 #ifdef HAVE_SYS_TIMES_H
 322         struct tms cpu_usage;
 323         times( &cpu_usage );
 324 #endif
 325
 326         intf_StatMsg( "vpar stats: %d loops among %d sequence(s)",
 327                       p_vpar->c_loops, p_vpar->c_sequences );
 328
 329 #ifdef HAVE_SYS_TIMES_H
 330         intf_StatMsg( "vpar stats: cpu usage (user: %d, system: %d)",
 331                       cpu_usage.tms_utime, cpu_usage.tms_stime );
 332 #endif
 333
 334         intf_StatMsg( "vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 335                       p_vpar->pc_pictures[I_CODING_TYPE]
 336                       + p_vpar->pc_pictures[P_CODING_TYPE]
 337                       + p_vpar->pc_pictures[B_CODING_TYPE],
 338                       p_vpar->pc_pictures[I_CODING_TYPE],
 339                       p_vpar->pc_pictures[P_CODING_TYPE],
 340                       p_vpar->pc_pictures[B_CODING_TYPE] );
 341         intf_StatMsg( "vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 342                       p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 343                       + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 344                       + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 345                       p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 346                       p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 347                       p_vpar->pc_decoded_pictures[B_CODING_TYPE] );
 348         intf_StatMsg( "vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 349                       p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 350                       + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 351                       + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 352                       p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 353                       p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 354                       p_vpar->pc_malformed_pictures[B_CODING_TYPE] );
 355 #define S   p_vpar->sequence
 356         intf_StatMsg( "vpar info: %s stream (%dx%d), %d.%d pi/s",
 357                       S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 358                       S.i_width, S.i_height, S.i_frame_rate/1001,
 359                       S.i_frame_rate % 1001 );
 360         intf_StatMsg( "vpar info: %s, %s, matrix_coeff: %d",
 361                       S.b_progressive ? "Progressive" : "Non-progressive",
 362                       S.i_scalable_mode ? "scalable" : "non-scalable",
 363                       S.i_matrix_coefficients );
 364 #undef S
 365     }
 366
 367     /* Dispose of matrices if they have been allocated. */
 368     if( p_vpar->sequence.intra_quant.b_allocated )
 369     {
 370         free( p_vpar->sequence.intra_quant.pi_matrix );
 371     }
 372     if( p_vpar->sequence.nonintra_quant.b_allocated )
 373     {
 374         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 375     }
 376     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 377     {
 378         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 379     }
 380     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 381     {
 382         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 383     }
 384
 385     vpar_EndPool( p_vpar );
 386
 387     free( p_vpar->p_config );
 388
 389     module_Unneed( p_vpar->p_idct_module );
 390     module_Unneed( p_vpar->p_motion_module );
 391
 392     free( p_vpar );
 393
 394     intf_DbgMsg("vpar debug: EndThread(%p)", p_vpar);
 395 }
 396
 397 /*****************************************************************************
 398  * BitstreamCallback: Import parameters from the new data/PES packet
 399  *****************************************************************************
 400  * This function is called by input's NextDataPacket.
 401  *****************************************************************************/
 402 static void BitstreamCallback ( bit_stream_t * p_bit_stream,
 403                                 boolean_t b_new_pes )
 404 {
 405     vpar_thread_t * p_vpar = (vpar_thread_t *)p_bit_stream->p_callback_arg;
 406
 407     if( b_new_pes )
 408     {
 409         p_vpar->sequence.next_pts =
 410             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_pts;
 411         p_vpar->sequence.next_dts =
 412             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_dts;
 413         p_vpar->sequence.i_current_rate =
 414             DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->i_rate;
 415
 416         if( DECODER_FIFO_START( *p_bit_stream->p_decoder_fifo )->b_discontinuity )
 417         {
 418 #ifdef TRACE_VPAR
 419             intf_DbgMsg( "Discontinuity in BitstreamCallback" );
 420 #endif
 421             /* Escape the current picture and reset the picture predictors. */
 422             p_vpar->sequence.b_expect_discontinuity = 1;
 423             p_vpar->picture.b_error = 1;
 424         }
 425     }
 426
 427     if( p_bit_stream->p_data->b_discard_payload )
 428     {
 429 #ifdef TRACE_VPAR
 430         intf_DbgMsg( "Discard payload in BitstreamCallback" );
 431 #endif
 432         /* 1 packet messed up, trash the slice. */
 433         p_vpar->picture.b_error = 1;
 434     }
 435 }