git.sesse.net Git - vlc/blob - plugins/mpeg_vdec/video_parser.c

   1 /*****************************************************************************
   2  * video_parser.c : video parser thread
   3  *****************************************************************************
   4  * Copyright (C) 1999-2001 VideoLAN
   5  * $Id: video_parser.c,v 1.20 2002/05/19 12:57:32 gbazin 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 <stdlib.h>                                      /* malloc(), free() */
  29
  30 #include <videolan/vlc.h>
  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 "video.h"
  44 #include "video_output.h"
  45
  46 #include "stream_control.h"
  47 #include "input_ext-dec.h"
  48
  49 #include "vdec_ext-plugins.h"
  50 #include "vpar_pool.h"
  51 #include "video_parser.h"
  52
  53 /*
  54  * Local prototypes
  55  */
  56 static int      decoder_Probe     ( u8 * );
  57 static int      decoder_Run       ( decoder_config_t * );
  58 static int      InitThread        ( vpar_thread_t * );
  59 static void     EndThread         ( vpar_thread_t * );
  60 static void     BitstreamCallback ( bit_stream_t *, boolean_t );
  61
  62 /*****************************************************************************
  63  * Capabilities
  64  *****************************************************************************/
  65 void _M( vdec_getfunctions )( function_list_t * p_function_list )
  66 {
  67     p_function_list->functions.dec.pf_probe = decoder_Probe;
  68     p_function_list->functions.dec.pf_run   = decoder_Run;
  69 }
  70
  71 /*****************************************************************************
  72  * Build configuration tree.
  73  *****************************************************************************/
  74 #define VDEC_IDCT_TEXT N_("IDCT module")
  75 #define VDEC_IDCT_LONGTEXT N_( \
  76     "This option allows you to select the IDCT module used by this video " \
  77     "decoder.\n" \
  78     "Note that the default behavior is to automatically select the best " \
  79     "module available.")
  80
  81 #define VDEC_MOTION_TEXT N_("motion compensation module")
  82 #define VDEC_MOTION_LONGTEXT N_( \
  83     "This option allows you to select the motion compensation module used by "\
  84     "this video decoder.\n" \
  85     "Note that the default behavior is to automatically select the best " \
  86     "module available.")
  87
  88 #define VDEC_SMP_TEXT N_("use additional processors")
  89 #define VDEC_SMP_LONGTEXT N_( \
  90     "This video decoder can benefit from a multiprocessor computer. If you " \
  91     "have one, you can specify the number of processors here.")
  92
  93 #define VPAR_SYNCHRO_TEXT N_("force synchro algorithm {I|I+|IP|IP+|IPB}")
  94 #define VPAR_SYNCHRO_LONGTEXT N_( \
  95     "This allows you to force the synchro algorithm, by directly selecting " \
  96     "the types of picture you want to decode. Please bear in mind that if " \
  97     "you select more pictures than what your CPU is capable to decode, " \
  98     "you won't get anything.")
  99
 100 MODULE_CONFIG_START
 101 ADD_CATEGORY_HINT( N_("Miscellaneous"), NULL)
 102 ADD_MODULE  ( "mpeg-idct", MODULE_CAPABILITY_IDCT, NULL, NULL,
 103               VDEC_IDCT_TEXT, VDEC_IDCT_LONGTEXT )
 104 ADD_MODULE  ( "mpeg-motion", MODULE_CAPABILITY_MOTION, NULL, NULL,
 105               VDEC_MOTION_TEXT, VDEC_IDCT_LONGTEXT )
 106 ADD_INTEGER ( "vdec-smp", 0, NULL, VDEC_SMP_TEXT, VDEC_SMP_LONGTEXT )
 107 ADD_STRING  ( "vpar-synchro", NULL, NULL, VPAR_SYNCHRO_TEXT,
 108               VPAR_SYNCHRO_LONGTEXT )
 109 MODULE_CONFIG_STOP
 110
 111 MODULE_INIT_START
 112     SET_DESCRIPTION( _("MPEG I/II video decoder module") )
 113     ADD_CAPABILITY( DECODER, 50 )
 114 MODULE_INIT_STOP
 115
 116 MODULE_ACTIVATE_START
 117     _M( vdec_getfunctions )( &p_module->p_functions->dec );
 118 MODULE_ACTIVATE_STOP
 119
 120 MODULE_DEACTIVATE_START
 121 MODULE_DEACTIVATE_STOP
 122
 123
 124 /*****************************************************************************
 125  * decoder_Probe: probe the decoder and return score
 126  *****************************************************************************
 127  * Tries to launch a decoder and return score so that the interface is able
 128  * to chose.
 129  *****************************************************************************/
 130 static int decoder_Probe( u8 *pi_type )
 131 {
 132     return( ( *pi_type == MPEG1_VIDEO_ES
 133                || *pi_type == MPEG2_VIDEO_ES ) ? 0 : -1 );
 134 }
 135
 136 /*****************************************************************************
 137  * decoder_Run: this function is called just after the thread is created
 138  *****************************************************************************/
 139 static int decoder_Run ( decoder_config_t * p_config )
 140 {
 141     vpar_thread_t *     p_vpar;
 142     boolean_t           b_error;
 143
 144     /* Allocate the memory needed to store the thread's structure */
 145     if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
 146     {
 147         intf_ErrMsg( "vpar error: not enough memory "
 148                      "for vpar_CreateThread() to create the new thread");
 149         DecoderError( p_config->p_decoder_fifo );
 150         return( -1 );
 151     }
 152
 153     /*
 154      * Initialize the thread properties
 155      */
 156     p_vpar->p_fifo = p_config->p_decoder_fifo;
 157     p_vpar->p_config = p_config;
 158     p_vpar->p_vout = NULL;
 159
 160     /*
 161      * Initialize thread
 162      */
 163     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 164
 165     /*
 166      * Main loop - it is not executed if an error occured during
 167      * initialization
 168      */
 169     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 170     {
 171         /* Find the next sequence header in the stream */
 172         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 173
 174         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 175         {
 176             p_vpar->c_loops++;
 177
 178             /* Parse the next sequence, group or picture header */
 179             if( vpar_ParseHeader( p_vpar ) )
 180             {
 181                 /* End of sequence */
 182                 break;
 183             }
 184         }
 185     }
 186
 187     /*
 188      * Error loop
 189      */
 190     if( ( b_error = p_vpar->p_fifo->b_error ) )
 191     {
 192         DecoderError( p_vpar->p_fifo );
 193     }
 194
 195     /* End of thread */
 196     EndThread( p_vpar );
 197
 198     if( b_error )
 199     {
 200         return( -1 );
 201     }
 202
 203     return( 0 );
 204
 205 }
 206
 207 /*****************************************************************************
 208  * InitThread: initialize vpar output thread
 209  *****************************************************************************
 210  * This function is called from decoder_Run and performs the second step
 211  * of the initialization. It returns 0 on success. Note that the thread's
 212  * flag are not modified inside this function.
 213  *****************************************************************************/
 214 static int InitThread( vpar_thread_t *p_vpar )
 215 {
 216     char *psz_name;
 217
 218     /*
 219      * Choose the best motion compensation module
 220      */
 221     psz_name = config_GetPszVariable( "mpeg-motion" );
 222     p_vpar->p_motion_module = module_Need( MODULE_CAPABILITY_MOTION, psz_name,
 223                                            NULL );
 224     if( psz_name ) free( psz_name );
 225
 226     if( p_vpar->p_motion_module == NULL )
 227     {
 228         intf_ErrMsg( "vpar error: no suitable motion compensation module" );
 229         free( p_vpar );
 230         return( -1 );
 231     }
 232
 233 #define f ( p_vpar->p_motion_module->p_functions->motion.functions.motion )
 234     memcpy( p_vpar->pool.ppppf_motion, f.ppppf_motion, sizeof(void *) * 16 );
 235 #undef f
 236
 237     /*
 238      * Choose the best IDCT module
 239      */
 240     psz_name = config_GetPszVariable( "mpeg-idct" );
 241     p_vpar->p_idct_module = module_Need( MODULE_CAPABILITY_IDCT, psz_name,
 242                                          NULL );
 243     if( psz_name ) free( psz_name );
 244
 245     if( p_vpar->p_idct_module == NULL )
 246     {
 247         intf_ErrMsg( "vpar error: no suitable IDCT module" );
 248         module_Unneed( p_vpar->p_motion_module );
 249         free( p_vpar );
 250         return( -1 );
 251     }
 252
 253 #define f p_vpar->p_idct_module->p_functions->idct.functions.idct
 254     p_vpar->pool.pf_idct_init   = f.pf_idct_init;
 255     p_vpar->pf_sparse_idct_add  = f.pf_sparse_idct_add;
 256     p_vpar->pf_idct_add         = f.pf_idct_add;
 257     p_vpar->pf_sparse_idct_copy = f.pf_sparse_idct_copy;
 258     p_vpar->pf_idct_copy        = f.pf_idct_copy;
 259     p_vpar->pf_norm_scan        = f.pf_norm_scan;
 260 #undef f
 261
 262     /* Initialize input bitstream */
 263     InitBitstream( &p_vpar->bit_stream, p_vpar->p_config->p_decoder_fifo,
 264                    BitstreamCallback, (void *)p_vpar );
 265
 266     /* Initialize parsing data */
 267     p_vpar->sequence.p_forward = NULL;
 268     p_vpar->sequence.p_backward = NULL;
 269     p_vpar->sequence.intra_quant.b_allocated = 0;
 270     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 271     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 272     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 273     p_vpar->sequence.i_matrix_coefficients = 1;
 274     p_vpar->sequence.next_pts = p_vpar->sequence.next_dts = 0;
 275     p_vpar->sequence.b_expect_discontinuity = 0;
 276
 277     /* Initialize copyright information */
 278     p_vpar->sequence.b_copyright_flag = 0;
 279     p_vpar->sequence.b_original = 0;
 280     p_vpar->sequence.i_copyright_id = 0;
 281     p_vpar->sequence.i_copyright_nb = 0;
 282
 283     p_vpar->picture.p_picture = NULL;
 284     p_vpar->picture.i_current_structure = 0;
 285
 286     /* Initialize other properties */
 287     p_vpar->c_loops = 0;
 288     p_vpar->c_sequences = 0;
 289     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 290     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 291     memset(p_vpar->pc_malformed_pictures, 0,
 292            sizeof(p_vpar->pc_malformed_pictures));
 293     vpar_InitScanTable( p_vpar );
 294
 295     /*
 296      * Initialize the synchro properties
 297      */
 298     vpar_SynchroInit( p_vpar );
 299
 300     /* Spawn optional video decoder threads */
 301     vpar_InitPool( p_vpar );
 302
 303     /* Mark thread as running and return */
 304     return( 0 );
 305 }
 306
 307 /*****************************************************************************
 308  * EndThread: thread destruction
 309  *****************************************************************************
 310  * This function is called when the thread ends after a sucessful
 311  * initialization.
 312  *****************************************************************************/
 313 static void EndThread( vpar_thread_t *p_vpar )
 314 {
 315     /* Release used video buffers. */
 316     if( p_vpar->sequence.p_forward != NULL )
 317     {
 318         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_forward );
 319     }
 320     if( p_vpar->sequence.p_backward != NULL )
 321     {
 322         vout_DatePicture( p_vpar->p_vout, p_vpar->sequence.p_backward,
 323                           vpar_SynchroDate( p_vpar ) );
 324         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_backward );
 325     }
 326     if( p_vpar->picture.p_picture != NULL )
 327     {
 328         vout_DestroyPicture( p_vpar->p_vout, p_vpar->picture.p_picture );
 329     }
 330
 331     if( p_main->b_stats )
 332     {
 333 #ifdef HAVE_SYS_TIMES_H
 334         struct tms cpu_usage;
 335         times( &cpu_usage );
 336 #endif
 337
 338         intf_StatMsg( "vpar stats: %d loops among %d sequence(s)",
 339                       p_vpar->c_loops, p_vpar->c_sequences );
 340
 341 #ifdef HAVE_SYS_TIMES_H
 342         intf_StatMsg( "vpar stats: cpu usage (user: %d, system: %d)",
 343                       cpu_usage.tms_utime, cpu_usage.tms_stime );
 344 #endif
 345
 346         intf_StatMsg( "vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 347                       p_vpar->pc_pictures[I_CODING_TYPE]
 348                       + p_vpar->pc_pictures[P_CODING_TYPE]
 349                       + p_vpar->pc_pictures[B_CODING_TYPE],
 350                       p_vpar->pc_pictures[I_CODING_TYPE],
 351                       p_vpar->pc_pictures[P_CODING_TYPE],
 352                       p_vpar->pc_pictures[B_CODING_TYPE] );
 353         intf_StatMsg( "vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 354                       p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 355                       + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 356                       + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 357                       p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 358                       p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 359                       p_vpar->pc_decoded_pictures[B_CODING_TYPE] );
 360         intf_StatMsg( "vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 361                       p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 362                       + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 363                       + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 364                       p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 365                       p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 366                       p_vpar->pc_malformed_pictures[B_CODING_TYPE] );
 367 #define S   p_vpar->sequence
 368         intf_StatMsg( "vpar info: %s stream (%dx%d), %d.%d pi/s",
 369                       S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 370                       S.i_width, S.i_height, S.i_frame_rate/1001,
 371                       S.i_frame_rate % 1001 );
 372         intf_StatMsg( "vpar info: %s, %s, matrix_coeff: %d",
 373                       S.b_progressive ? "Progressive" : "Non-progressive",
 374                       S.i_scalable_mode ? "scalable" : "non-scalable",
 375                       S.i_matrix_coefficients );
 376 #undef S
 377     }
 378
 379     /* Dispose of matrices if they have been allocated. */
 380     if( p_vpar->sequence.intra_quant.b_allocated )
 381     {
 382         free( p_vpar->sequence.intra_quant.pi_matrix );
 383     }
 384     if( p_vpar->sequence.nonintra_quant.b_allocated )
 385     {
 386         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 387     }
 388     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 389     {
 390         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 391     }
 392     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 393     {
 394         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 395     }
 396
 397     vpar_EndPool( p_vpar );
 398
 399     module_Unneed( p_vpar->p_idct_module );
 400     module_Unneed( p_vpar->p_motion_module );
 401
 402     free( p_vpar );
 403 }
 404
 405 /*****************************************************************************
 406  * BitstreamCallback: Import parameters from the new data/PES packet
 407  *****************************************************************************
 408  * This function is called by input's NextDataPacket.
 409  *****************************************************************************/
 410 static void BitstreamCallback ( bit_stream_t * p_bit_stream,
 411                                 boolean_t b_new_pes )
 412 {
 413     vpar_thread_t * p_vpar = (vpar_thread_t *)p_bit_stream->p_callback_arg;
 414
 415     if( b_new_pes )
 416     {
 417         p_vpar->sequence.i_current_rate =
 418             p_bit_stream->p_decoder_fifo->p_first->i_rate;
 419
 420         if( p_bit_stream->p_decoder_fifo->p_first->b_discontinuity )
 421         {
 422             /* Escape the current picture and reset the picture predictors. */
 423             p_vpar->sequence.b_expect_discontinuity = 1;
 424             p_vpar->picture.b_error = 1;
 425         }
 426     }
 427
 428     if( p_bit_stream->p_data->b_discard_payload )
 429     {
 430         /* 1 packet messed up, trash the slice. */
 431         p_vpar->picture.b_error = 1;
 432     }
 433 }