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 1.19 2002/05/19 09:37:02 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     "If you don't want this video decoder to decode all frames of the video, "\
  96     "you can specify which synchro algorithm you want to use.")
  97
  98 MODULE_CONFIG_START
  99 ADD_CATEGORY_HINT( N_("Miscellaneous"), NULL)
 100 ADD_MODULE  ( "mpeg-idct", MODULE_CAPABILITY_IDCT, NULL, NULL,
 101               VDEC_IDCT_TEXT, VDEC_IDCT_LONGTEXT )
 102 ADD_MODULE  ( "mpeg-motion", MODULE_CAPABILITY_MOTION, NULL, NULL,
 103               VDEC_MOTION_TEXT, VDEC_IDCT_LONGTEXT )
 104 ADD_INTEGER ( "vdec-smp", 0, NULL, VDEC_SMP_TEXT, VDEC_SMP_LONGTEXT )
 105 ADD_STRING  ( "vpar-synchro", NULL, NULL, VPAR_SYNCHRO_TEXT,
 106               VPAR_SYNCHRO_LONGTEXT )
 107 MODULE_CONFIG_STOP
 108
 109 MODULE_INIT_START
 110     SET_DESCRIPTION( _("MPEG I/II video decoder module") )
 111     ADD_CAPABILITY( DECODER, 50 )
 112 MODULE_INIT_STOP
 113
 114 MODULE_ACTIVATE_START
 115     _M( vdec_getfunctions )( &p_module->p_functions->dec );
 116 MODULE_ACTIVATE_STOP
 117
 118 MODULE_DEACTIVATE_START
 119 MODULE_DEACTIVATE_STOP
 120
 121
 122 /*****************************************************************************
 123  * decoder_Probe: probe the decoder and return score
 124  *****************************************************************************
 125  * Tries to launch a decoder and return score so that the interface is able
 126  * to chose.
 127  *****************************************************************************/
 128 static int decoder_Probe( u8 *pi_type )
 129 {
 130     return( ( *pi_type == MPEG1_VIDEO_ES
 131                || *pi_type == MPEG2_VIDEO_ES ) ? 0 : -1 );
 132 }
 133
 134 /*****************************************************************************
 135  * decoder_Run: this function is called just after the thread is created
 136  *****************************************************************************/
 137 static int decoder_Run ( decoder_config_t * p_config )
 138 {
 139     vpar_thread_t *     p_vpar;
 140     boolean_t           b_error;
 141
 142     /* Allocate the memory needed to store the thread's structure */
 143     if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
 144     {
 145         intf_ErrMsg( "vpar error: not enough memory "
 146                      "for vpar_CreateThread() to create the new thread");
 147         DecoderError( p_config->p_decoder_fifo );
 148         return( -1 );
 149     }
 150
 151     /*
 152      * Initialize the thread properties
 153      */
 154     p_vpar->p_fifo = p_config->p_decoder_fifo;
 155     p_vpar->p_config = p_config;
 156     p_vpar->p_vout = NULL;
 157
 158     /*
 159      * Initialize thread
 160      */
 161     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 162
 163     /*
 164      * Main loop - it is not executed if an error occured during
 165      * initialization
 166      */
 167     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 168     {
 169         /* Find the next sequence header in the stream */
 170         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 171
 172         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 173         {
 174             p_vpar->c_loops++;
 175
 176             /* Parse the next sequence, group or picture header */
 177             if( vpar_ParseHeader( p_vpar ) )
 178             {
 179                 /* End of sequence */
 180                 break;
 181             }
 182         }
 183     }
 184
 185     /*
 186      * Error loop
 187      */
 188     if( ( b_error = p_vpar->p_fifo->b_error ) )
 189     {
 190         DecoderError( p_vpar->p_fifo );
 191     }
 192
 193     /* End of thread */
 194     EndThread( p_vpar );
 195
 196     if( b_error )
 197     {
 198         return( -1 );
 199     }
 200
 201     return( 0 );
 202
 203 }
 204
 205 /*****************************************************************************
 206  * InitThread: initialize vpar output thread
 207  *****************************************************************************
 208  * This function is called from decoder_Run and performs the second step
 209  * of the initialization. It returns 0 on success. Note that the thread's
 210  * flag are not modified inside this function.
 211  *****************************************************************************/
 212 static int InitThread( vpar_thread_t *p_vpar )
 213 {
 214     char *psz_name;
 215
 216     /*
 217      * Choose the best motion compensation module
 218      */
 219     psz_name = config_GetPszVariable( "mpeg-motion" );
 220     p_vpar->p_motion_module = module_Need( MODULE_CAPABILITY_MOTION, psz_name,
 221                                            NULL );
 222     if( psz_name ) free( psz_name );
 223
 224     if( p_vpar->p_motion_module == NULL )
 225     {
 226         intf_ErrMsg( "vpar error: no suitable motion compensation module" );
 227         free( p_vpar );
 228         return( -1 );
 229     }
 230
 231 #define f ( p_vpar->p_motion_module->p_functions->motion.functions.motion )
 232     memcpy( p_vpar->pool.ppppf_motion, f.ppppf_motion, sizeof(void *) * 16 );
 233 #undef f
 234
 235     /*
 236      * Choose the best IDCT module
 237      */
 238     psz_name = config_GetPszVariable( "mpeg-idct" );
 239     p_vpar->p_idct_module = module_Need( MODULE_CAPABILITY_IDCT, psz_name,
 240                                          NULL );
 241     if( psz_name ) free( psz_name );
 242
 243     if( p_vpar->p_idct_module == NULL )
 244     {
 245         intf_ErrMsg( "vpar error: no suitable IDCT module" );
 246         module_Unneed( p_vpar->p_motion_module );
 247         free( p_vpar );
 248         return( -1 );
 249     }
 250
 251 #define f p_vpar->p_idct_module->p_functions->idct.functions.idct
 252     p_vpar->pool.pf_idct_init   = f.pf_idct_init;
 253     p_vpar->pf_sparse_idct_add  = f.pf_sparse_idct_add;
 254     p_vpar->pf_idct_add         = f.pf_idct_add;
 255     p_vpar->pf_sparse_idct_copy = f.pf_sparse_idct_copy;
 256     p_vpar->pf_idct_copy        = f.pf_idct_copy;
 257     p_vpar->pf_norm_scan        = f.pf_norm_scan;
 258 #undef f
 259
 260     /* Initialize input bitstream */
 261     InitBitstream( &p_vpar->bit_stream, p_vpar->p_config->p_decoder_fifo,
 262                    BitstreamCallback, (void *)p_vpar );
 263
 264     /* Initialize parsing data */
 265     p_vpar->sequence.p_forward = NULL;
 266     p_vpar->sequence.p_backward = NULL;
 267     p_vpar->sequence.intra_quant.b_allocated = 0;
 268     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 269     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 270     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 271     p_vpar->sequence.i_matrix_coefficients = 1;
 272     p_vpar->sequence.next_pts = p_vpar->sequence.next_dts = 0;
 273     p_vpar->sequence.b_expect_discontinuity = 0;
 274
 275     /* Initialize copyright information */
 276     p_vpar->sequence.b_copyright_flag = 0;
 277     p_vpar->sequence.b_original = 0;
 278     p_vpar->sequence.i_copyright_id = 0;
 279     p_vpar->sequence.i_copyright_nb = 0;
 280
 281     p_vpar->picture.p_picture = NULL;
 282     p_vpar->picture.i_current_structure = 0;
 283
 284     /* Initialize other properties */
 285     p_vpar->c_loops = 0;
 286     p_vpar->c_sequences = 0;
 287     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 288     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 289     memset(p_vpar->pc_malformed_pictures, 0,
 290            sizeof(p_vpar->pc_malformed_pictures));
 291     vpar_InitScanTable( p_vpar );
 292
 293     /*
 294      * Initialize the synchro properties
 295      */
 296     vpar_SynchroInit( p_vpar );
 297
 298     /* Spawn optional video decoder threads */
 299     vpar_InitPool( p_vpar );
 300
 301     /* Mark thread as running and return */
 302     return( 0 );
 303 }
 304
 305 /*****************************************************************************
 306  * EndThread: thread destruction
 307  *****************************************************************************
 308  * This function is called when the thread ends after a sucessful
 309  * initialization.
 310  *****************************************************************************/
 311 static void EndThread( vpar_thread_t *p_vpar )
 312 {
 313     /* Release used video buffers. */
 314     if( p_vpar->sequence.p_forward != NULL )
 315     {
 316         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_forward );
 317     }
 318     if( p_vpar->sequence.p_backward != NULL )
 319     {
 320         vout_DatePicture( p_vpar->p_vout, p_vpar->sequence.p_backward,
 321                           vpar_SynchroDate( p_vpar ) );
 322         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_backward );
 323     }
 324     if( p_vpar->picture.p_picture != NULL )
 325     {
 326         vout_DestroyPicture( p_vpar->p_vout, p_vpar->picture.p_picture );
 327     }
 328
 329     if( p_main->b_stats )
 330     {
 331 #ifdef HAVE_SYS_TIMES_H
 332         struct tms cpu_usage;
 333         times( &cpu_usage );
 334 #endif
 335
 336         intf_StatMsg( "vpar stats: %d loops among %d sequence(s)",
 337                       p_vpar->c_loops, p_vpar->c_sequences );
 338
 339 #ifdef HAVE_SYS_TIMES_H
 340         intf_StatMsg( "vpar stats: cpu usage (user: %d, system: %d)",
 341                       cpu_usage.tms_utime, cpu_usage.tms_stime );
 342 #endif
 343
 344         intf_StatMsg( "vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 345                       p_vpar->pc_pictures[I_CODING_TYPE]
 346                       + p_vpar->pc_pictures[P_CODING_TYPE]
 347                       + p_vpar->pc_pictures[B_CODING_TYPE],
 348                       p_vpar->pc_pictures[I_CODING_TYPE],
 349                       p_vpar->pc_pictures[P_CODING_TYPE],
 350                       p_vpar->pc_pictures[B_CODING_TYPE] );
 351         intf_StatMsg( "vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 352                       p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 353                       + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 354                       + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 355                       p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 356                       p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 357                       p_vpar->pc_decoded_pictures[B_CODING_TYPE] );
 358         intf_StatMsg( "vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 359                       p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 360                       + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 361                       + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 362                       p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 363                       p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 364                       p_vpar->pc_malformed_pictures[B_CODING_TYPE] );
 365 #define S   p_vpar->sequence
 366         intf_StatMsg( "vpar info: %s stream (%dx%d), %d.%d pi/s",
 367                       S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 368                       S.i_width, S.i_height, S.i_frame_rate/1001,
 369                       S.i_frame_rate % 1001 );
 370         intf_StatMsg( "vpar info: %s, %s, matrix_coeff: %d",
 371                       S.b_progressive ? "Progressive" : "Non-progressive",
 372                       S.i_scalable_mode ? "scalable" : "non-scalable",
 373                       S.i_matrix_coefficients );
 374 #undef S
 375     }
 376
 377     /* Dispose of matrices if they have been allocated. */
 378     if( p_vpar->sequence.intra_quant.b_allocated )
 379     {
 380         free( p_vpar->sequence.intra_quant.pi_matrix );
 381     }
 382     if( p_vpar->sequence.nonintra_quant.b_allocated )
 383     {
 384         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 385     }
 386     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 387     {
 388         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 389     }
 390     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 391     {
 392         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 393     }
 394
 395     vpar_EndPool( p_vpar );
 396
 397     module_Unneed( p_vpar->p_idct_module );
 398     module_Unneed( p_vpar->p_motion_module );
 399
 400     free( p_vpar );
 401 }
 402
 403 /*****************************************************************************
 404  * BitstreamCallback: Import parameters from the new data/PES packet
 405  *****************************************************************************
 406  * This function is called by input's NextDataPacket.
 407  *****************************************************************************/
 408 static void BitstreamCallback ( bit_stream_t * p_bit_stream,
 409                                 boolean_t b_new_pes )
 410 {
 411     vpar_thread_t * p_vpar = (vpar_thread_t *)p_bit_stream->p_callback_arg;
 412
 413     if( b_new_pes )
 414     {
 415         p_vpar->sequence.i_current_rate =
 416             p_bit_stream->p_decoder_fifo->p_first->i_rate;
 417
 418         if( p_bit_stream->p_decoder_fifo->p_first->b_discontinuity )
 419         {
 420             /* Escape the current picture and reset the picture predictors. */
 421             p_vpar->sequence.b_expect_discontinuity = 1;
 422             p_vpar->picture.b_error = 1;
 423         }
 424     }
 425
 426     if( p_bit_stream->p_data->b_discard_payload )
 427     {
 428         /* 1 packet messed up, trash the slice. */
 429         p_vpar->picture.b_error = 1;
 430     }
 431 }