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 1.10 2001/12/30 07:09:56 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 <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     ( probedata_t * );
  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->pf_probe = decoder_Probe;
  68     p_function_list->functions.dec.pf_run = decoder_Run;
  69 }
  70
  71 /*****************************************************************************
  72  * Build configuration tree.
  73  *****************************************************************************/
  74 MODULE_CONFIG_START
  75 MODULE_CONFIG_STOP
  76
  77 MODULE_INIT_START
  78     SET_DESCRIPTION( "MPEG I/II video decoder module" )
  79     ADD_CAPABILITY( DECODER, 50 )
  80 MODULE_INIT_STOP
  81
  82 MODULE_ACTIVATE_START
  83     _M( vdec_getfunctions )( &p_module->p_functions->dec );
  84 MODULE_ACTIVATE_STOP
  85
  86 MODULE_DEACTIVATE_START
  87 MODULE_DEACTIVATE_STOP
  88
  89
  90 /*****************************************************************************
  91  * decoder_Probe: probe the decoder and return score
  92  *****************************************************************************
  93  * Tries to launch a decoder and return score so that the interface is able
  94  * to chose.
  95  *****************************************************************************/
  96 static int decoder_Probe( probedata_t *p_data )
  97 {
  98     return( ( p_data->i_type == MPEG1_VIDEO_ES
  99                || p_data->i_type == MPEG2_VIDEO_ES ) ? 50 : 0 );
 100 }
 101
 102 /*****************************************************************************
 103  * decoder_Run: this function is called just after the thread is created
 104  *****************************************************************************/
 105 static int decoder_Run ( decoder_config_t * p_config )
 106 {
 107     vpar_thread_t *     p_vpar;
 108     boolean_t           b_error;
 109
 110     intf_DbgMsg( "vpar debug: video parser thread created. Initializing..." );
 111
 112     /* Allocate the memory needed to store the thread's structure */
 113     if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
 114     {
 115         intf_ErrMsg( "vpar error: not enough memory "
 116                      "for vpar_CreateThread() to create the new thread");
 117         DecoderError( p_config->p_decoder_fifo );
 118         return( -1 );
 119     }
 120
 121     /*
 122      * Initialize the thread properties
 123      */
 124     p_vpar->p_fifo = p_config->p_decoder_fifo;
 125     p_vpar->p_config = p_config;
 126     p_vpar->p_vout = NULL;
 127
 128     /*
 129      * Initialize thread
 130      */
 131     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 132
 133     /*
 134      * Main loop - it is not executed if an error occured during
 135      * initialization
 136      */
 137     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 138     {
 139         /* Find the next sequence header in the stream */
 140         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 141
 142         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 143         {
 144             p_vpar->c_loops++;
 145
 146             /* Parse the next sequence, group or picture header */
 147             if( vpar_ParseHeader( p_vpar ) )
 148             {
 149                 /* End of sequence */
 150                 break;
 151             }
 152         }
 153     }
 154
 155     /*
 156      * Error loop
 157      */
 158     if( ( b_error = p_vpar->p_fifo->b_error ) )
 159     {
 160         DecoderError( p_vpar->p_fifo );
 161     }
 162
 163     /* End of thread */
 164     EndThread( p_vpar );
 165
 166     if( b_error )
 167     {
 168         return( -1 );
 169     }
 170
 171     return( 0 );
 172
 173 }
 174
 175 /*****************************************************************************
 176  * InitThread: initialize vpar output thread
 177  *****************************************************************************
 178  * This function is called from decoder_Run and performs the second step
 179  * of the initialization. It returns 0 on success. Note that the thread's
 180  * flag are not modified inside this function.
 181  *****************************************************************************/
 182 static int InitThread( vpar_thread_t *p_vpar )
 183 {
 184     /*
 185      * Choose the best motion compensation module
 186      */
 187     p_vpar->p_motion_module = module_Need( MODULE_CAPABILITY_MOTION,
 188                                 main_GetPszVariable( MOTION_METHOD_VAR, NULL ),
 189                                 NULL );
 190
 191     if( p_vpar->p_motion_module == NULL )
 192     {
 193         intf_ErrMsg( "vpar error: no suitable motion compensation module" );
 194         free( p_vpar );
 195         return( -1 );
 196     }
 197
 198 #define f ( p_vpar->p_motion_module->p_functions->motion.functions.motion )
 199     memcpy( p_vpar->pool.ppppf_motion, f.ppppf_motion, sizeof(void *) * 16 );
 200 #undef f
 201
 202     /*
 203      * Choose the best IDCT module
 204      */
 205     p_vpar->p_idct_module = module_Need( MODULE_CAPABILITY_IDCT,
 206                                   main_GetPszVariable( IDCT_METHOD_VAR, NULL ),
 207                                   NULL );
 208
 209     if( p_vpar->p_idct_module == NULL )
 210     {
 211         intf_ErrMsg( "vpar error: no suitable IDCT module" );
 212         module_Unneed( p_vpar->p_motion_module );
 213         free( p_vpar );
 214         return( -1 );
 215     }
 216
 217 #define f p_vpar->p_idct_module->p_functions->idct.functions.idct
 218     p_vpar->pool.pf_idct_init   = f.pf_idct_init;
 219     p_vpar->pf_sparse_idct_add  = f.pf_sparse_idct_add;
 220     p_vpar->pf_idct_add         = f.pf_idct_add;
 221     p_vpar->pf_sparse_idct_copy = f.pf_sparse_idct_copy;
 222     p_vpar->pf_idct_copy        = f.pf_idct_copy;
 223     p_vpar->pf_norm_scan        = f.pf_norm_scan;
 224 #undef f
 225
 226     /* Initialize input bitstream */
 227     p_vpar->p_config->pf_init_bit_stream( &p_vpar->bit_stream,
 228         p_vpar->p_config->p_decoder_fifo, BitstreamCallback,
 229         (void *)p_vpar );
 230
 231     /* Initialize parsing data */
 232     p_vpar->sequence.p_forward = NULL;
 233     p_vpar->sequence.p_backward = NULL;
 234     p_vpar->sequence.intra_quant.b_allocated = 0;
 235     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 236     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 237     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 238     p_vpar->sequence.i_matrix_coefficients = 1;
 239     p_vpar->sequence.next_pts = p_vpar->sequence.next_dts = 0;
 240     p_vpar->sequence.b_expect_discontinuity = 0;
 241
 242     /* Initialize copyright information */
 243     p_vpar->sequence.b_copyright_flag = 0;
 244     p_vpar->sequence.b_original = 0;
 245     p_vpar->sequence.i_copyright_id = 0;
 246     p_vpar->sequence.i_copyright_nb = 0;
 247
 248     p_vpar->picture.p_picture = NULL;
 249     p_vpar->picture.i_current_structure = 0;
 250
 251     /* Initialize other properties */
 252     p_vpar->c_loops = 0;
 253     p_vpar->c_sequences = 0;
 254     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 255     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 256     memset(p_vpar->pc_malformed_pictures, 0,
 257            sizeof(p_vpar->pc_malformed_pictures));
 258     vpar_InitScanTable( p_vpar );
 259
 260     /*
 261      * Initialize the synchro properties
 262      */
 263     vpar_SynchroInit( p_vpar );
 264
 265     /* Spawn optional video decoder threads */
 266     vpar_InitPool( p_vpar );
 267
 268     /* Mark thread as running and return */
 269     intf_DbgMsg("vpar debug: InitThread(%p) succeeded", p_vpar);
 270     return( 0 );
 271 }
 272
 273 /*****************************************************************************
 274  * EndThread: thread destruction
 275  *****************************************************************************
 276  * This function is called when the thread ends after a sucessful
 277  * initialization.
 278  *****************************************************************************/
 279 static void EndThread( vpar_thread_t *p_vpar )
 280 {
 281     intf_DbgMsg("vpar debug: destroying video parser thread %p", p_vpar);
 282
 283     /* Release used video buffers. */
 284     if( p_vpar->sequence.p_forward != NULL )
 285     {
 286         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_forward );
 287     }
 288     if( p_vpar->sequence.p_backward != NULL )
 289     {
 290         vout_DatePicture( p_vpar->p_vout, p_vpar->sequence.p_backward,
 291                           vpar_SynchroDate( p_vpar ) );
 292         vout_UnlinkPicture( p_vpar->p_vout, p_vpar->sequence.p_backward );
 293     }
 294     if( p_vpar->picture.p_picture != NULL )
 295     {
 296         vout_DestroyPicture( p_vpar->p_vout, p_vpar->picture.p_picture );
 297     }
 298
 299     if( p_main->b_stats )
 300     {
 301 #ifdef HAVE_SYS_TIMES_H
 302         struct tms cpu_usage;
 303         times( &cpu_usage );
 304 #endif
 305
 306         intf_StatMsg( "vpar stats: %d loops among %d sequence(s)",
 307                       p_vpar->c_loops, p_vpar->c_sequences );
 308
 309 #ifdef HAVE_SYS_TIMES_H
 310         intf_StatMsg( "vpar stats: cpu usage (user: %d, system: %d)",
 311                       cpu_usage.tms_utime, cpu_usage.tms_stime );
 312 #endif
 313
 314         intf_StatMsg( "vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 315                       p_vpar->pc_pictures[I_CODING_TYPE]
 316                       + p_vpar->pc_pictures[P_CODING_TYPE]
 317                       + p_vpar->pc_pictures[B_CODING_TYPE],
 318                       p_vpar->pc_pictures[I_CODING_TYPE],
 319                       p_vpar->pc_pictures[P_CODING_TYPE],
 320                       p_vpar->pc_pictures[B_CODING_TYPE] );
 321         intf_StatMsg( "vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 322                       p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 323                       + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 324                       + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 325                       p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 326                       p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 327                       p_vpar->pc_decoded_pictures[B_CODING_TYPE] );
 328         intf_StatMsg( "vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 329                       p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 330                       + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 331                       + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 332                       p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 333                       p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 334                       p_vpar->pc_malformed_pictures[B_CODING_TYPE] );
 335 #define S   p_vpar->sequence
 336         intf_StatMsg( "vpar info: %s stream (%dx%d), %d.%d pi/s",
 337                       S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 338                       S.i_width, S.i_height, S.i_frame_rate/1001,
 339                       S.i_frame_rate % 1001 );
 340         intf_StatMsg( "vpar info: %s, %s, matrix_coeff: %d",
 341                       S.b_progressive ? "Progressive" : "Non-progressive",
 342                       S.i_scalable_mode ? "scalable" : "non-scalable",
 343                       S.i_matrix_coefficients );
 344 #undef S
 345     }
 346
 347     /* Dispose of matrices if they have been allocated. */
 348     if( p_vpar->sequence.intra_quant.b_allocated )
 349     {
 350         free( p_vpar->sequence.intra_quant.pi_matrix );
 351     }
 352     if( p_vpar->sequence.nonintra_quant.b_allocated )
 353     {
 354         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 355     }
 356     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 357     {
 358         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 359     }
 360     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 361     {
 362         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 363     }
 364
 365     vpar_EndPool( p_vpar );
 366
 367     module_Unneed( p_vpar->p_idct_module );
 368     module_Unneed( p_vpar->p_motion_module );
 369
 370     free( p_vpar );
 371
 372     intf_DbgMsg("vpar debug: EndThread(%p)", p_vpar);
 373 }
 374
 375 /*****************************************************************************
 376  * BitstreamCallback: Import parameters from the new data/PES packet
 377  *****************************************************************************
 378  * This function is called by input's NextDataPacket.
 379  *****************************************************************************/
 380 static void BitstreamCallback ( bit_stream_t * p_bit_stream,
 381                                 boolean_t b_new_pes )
 382 {
 383     vpar_thread_t * p_vpar = (vpar_thread_t *)p_bit_stream->p_callback_arg;
 384
 385     if( b_new_pes )
 386     {
 387         p_vpar->sequence.next_pts =
 388             p_bit_stream->p_decoder_fifo->p_first->i_pts;
 389         p_vpar->sequence.next_dts =
 390             p_bit_stream->p_decoder_fifo->p_first->i_dts;
 391         p_vpar->sequence.i_current_rate =
 392             p_bit_stream->p_decoder_fifo->p_first->i_rate;
 393
 394         if( p_bit_stream->p_decoder_fifo->p_first->b_discontinuity )
 395         {
 396 #ifdef TRACE_VPAR
 397             intf_DbgMsg( "Discontinuity in BitstreamCallback" );
 398 #endif
 399             /* Escape the current picture and reset the picture predictors. */
 400             p_vpar->sequence.b_expect_discontinuity = 1;
 401             p_vpar->picture.b_error = 1;
 402         }
 403     }
 404
 405     if( p_bit_stream->p_data->b_discard_payload )
 406     {
 407 #ifdef TRACE_VPAR
 408         intf_DbgMsg( "Discard payload in BitstreamCallback" );
 409 #endif
 410         /* 1 packet messed up, trash the slice. */
 411         p_vpar->picture.b_error = 1;
 412     }
 413 }