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

   1 /*****************************************************************************
   2  * video_parser.c : video parser thread
   3  *****************************************************************************
   4  * Copyright (C) 1999, 2000 VideoLAN
   5  * $Id: video_parser.c,v 1.61 2001/01/05 18:46:45 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 #include <unistd.h>                                              /* getpid() */
  32 #include <errno.h>
  33 #include <string.h>
  34
  35 #ifdef STATS
  36 #  include <sys/times.h>
  37 #endif
  38
  39 #include "config.h"
  40 #include "common.h"
  41 #include "threads.h"
  42 #include "mtime.h"
  43 #include "plugins.h"
  44
  45 #include "intf_msg.h"
  46
  47 #include "stream_control.h"
  48 #include "input_ext-dec.h"
  49
  50 #include "video.h"
  51 #include "video_output.h"
  52
  53 #include "../video_decoder/vdec_idct.h"
  54 #include "../video_decoder/video_decoder.h"
  55 #include "../video_decoder/vdec_motion.h"
  56
  57 #include "../video_decoder/vpar_blocks.h"
  58 #include "../video_decoder/vpar_headers.h"
  59 #include "../video_decoder/vpar_synchro.h"
  60 #include "../video_decoder/video_parser.h"
  61 #include "../video_decoder/video_fifo.h"
  62
  63 /*
  64  * Local prototypes
  65  */
  66 static int      InitThread          ( vpar_thread_t *p_vpar );
  67 static void     RunThread           ( vpar_thread_t *p_vpar );
  68 static void     ErrorThread         ( vpar_thread_t *p_vpar );
  69 static void     EndThread           ( vpar_thread_t *p_vpar );
  70
  71 /*****************************************************************************
  72  * vpar_CreateThread: create a generic parser thread
  73  *****************************************************************************
  74  * This function creates a new video parser thread, and returns a pointer
  75  * to its description. On error, it returns NULL.
  76  * Following configuration properties are used:
  77  * XXX??
  78  *****************************************************************************/
  79 vlc_thread_t vpar_CreateThread( vdec_config_t * p_config )
  80 {
  81     vpar_thread_t *     p_vpar;
  82
  83     intf_DbgMsg( "vpar debug: creating video parser thread" );
  84
  85     /* Allocate the memory needed to store the thread's structure */
  86     if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
  87     {
  88         intf_ErrMsg( "vpar error: not enough memory "
  89                      "for vpar_CreateThread() to create the new thread");
  90         return( 0 );
  91     }
  92
  93     /*
  94      * Initialize the thread properties
  95      */
  96     p_vpar->p_fifo = p_config->decoder_config.p_decoder_fifo;
  97     p_vpar->p_config = p_config;
  98
  99     p_vpar->p_vout = p_config->p_vout;
 100
 101     /* Spawn the video parser thread */
 102     if ( vlc_thread_create( &p_vpar->thread_id, "video parser",
 103                             (vlc_thread_func_t)RunThread, (void *)p_vpar ) )
 104     {
 105         intf_ErrMsg("vpar error: can't spawn video parser thread");
 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 #ifdef VDEC_SMP
 126     int i_dummy;
 127 #endif
 128
 129     intf_DbgMsg("vpar debug: initializing video parser thread %p", p_vpar);
 130
 131     p_vpar->p_config->decoder_config.pf_init_bit_stream( &p_vpar->bit_stream,
 132         p_vpar->p_config->decoder_config.p_decoder_fifo );
 133
 134     /* Initialize parsing data */
 135     p_vpar->sequence.p_forward = NULL;
 136     p_vpar->sequence.p_backward = NULL;
 137     p_vpar->sequence.intra_quant.b_allocated = 0;
 138     p_vpar->sequence.nonintra_quant.b_allocated = 0;
 139     p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
 140     p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
 141     /* FIXME : initialize matrix_coefficients, but to what value ? */
 142
 143     /* Initialize copyright information */
 144     p_vpar->sequence.b_copyright_flag = 0;
 145     p_vpar->sequence.b_original = 0;
 146     p_vpar->sequence.i_copyright_id = 0;
 147     p_vpar->sequence.i_copyright_nb = 0;
 148
 149     p_vpar->picture.p_picture = NULL;
 150     p_vpar->picture.i_current_structure = 0;
 151
 152     /* Initialize other properties */
 153 #ifdef STATS
 154     p_vpar->c_loops = 0;
 155     p_vpar->c_sequences = 0;
 156     memset(p_vpar->pc_pictures, 0, sizeof(p_vpar->pc_pictures));
 157     memset(p_vpar->pc_decoded_pictures, 0, sizeof(p_vpar->pc_decoded_pictures));
 158     memset(p_vpar->pc_malformed_pictures, 0,
 159            sizeof(p_vpar->pc_malformed_pictures));
 160 #endif
 161
 162     /* Initialize video FIFO */
 163     vpar_InitFIFO( p_vpar );
 164
 165     memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
 166
 167 #ifdef VDEC_SMP
 168     /* Spawn video_decoder threads */
 169     /* FIXME: modify the number of vdecs at runtime ?? */
 170     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 171     {
 172         if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
 173         {
 174             return( 1 );
 175         }
 176     }
 177 #else
 178     /* Fake a video_decoder thread */
 179     if( (p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t )))
 180          == NULL || vdec_InitThread( p_vpar->pp_vdec[0] ) )
 181     {
 182         return( 1 );
 183     }
 184     p_vpar->pp_vdec[0]->b_die = 0;
 185     p_vpar->pp_vdec[0]->b_error = 0;
 186     p_vpar->pp_vdec[0]->p_vpar = p_vpar;
 187
 188     /* Re-nice ourself */
 189     if( nice(VDEC_NICE) == -1 )
 190     {
 191         intf_WarnMsg( 2, "vpar warning : couldn't nice() (%s)",
 192                       strerror(errno) );
 193     }
 194 #endif
 195
 196     /* Initialize lookup tables */
 197 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
 198     vpar_InitCrop( p_vpar );
 199 #endif
 200     vpar_InitMbAddrInc( p_vpar );
 201     vpar_InitDCTTables( p_vpar );
 202     vpar_InitPMBType( p_vpar );
 203     vpar_InitBMBType( p_vpar );
 204     vpar_InitDCTTables( p_vpar );
 205
 206     /*
 207      * Initialize the synchro properties
 208      */
 209     vpar_SynchroInit( p_vpar );
 210
 211     /* Mark thread as running and return */
 212     intf_DbgMsg("vpar debug: InitThread(%p) succeeded", p_vpar);
 213     return( 0 );
 214 }
 215
 216 /*****************************************************************************
 217  * RunThread: generic parser thread
 218  *****************************************************************************
 219  * Video parser thread. This function only returns when the thread is
 220  * terminated.
 221  *****************************************************************************/
 222 static void RunThread( vpar_thread_t *p_vpar )
 223 {
 224     intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)", p_vpar, getpid());
 225
 226     /*
 227      * Initialize thread
 228      */
 229     p_vpar->p_fifo->b_error = InitThread( p_vpar );
 230
 231     /*
 232      * Main loop - it is not executed if an error occured during
 233      * initialization
 234      */
 235     while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 236     {
 237         /* Find the next sequence header in the stream */
 238         p_vpar->p_fifo->b_error = vpar_NextSequenceHeader( p_vpar );
 239
 240         while( (!p_vpar->p_fifo->b_die) && (!p_vpar->p_fifo->b_error) )
 241         {
 242 #ifdef STATS
 243             p_vpar->c_loops++;
 244 #endif
 245             /* Parse the next sequence, group or picture header */
 246             if( vpar_ParseHeader( p_vpar ) )
 247             {
 248                 /* End of sequence */
 249                 break;
 250             };
 251         }
 252     }
 253
 254     /*
 255      * Error loop
 256      */
 257     if( p_vpar->p_fifo->b_error )
 258     {
 259         ErrorThread( p_vpar );
 260     }
 261
 262     /* End of thread */
 263     EndThread( p_vpar );
 264 }
 265
 266 /*****************************************************************************
 267  * ErrorThread: RunThread() error loop
 268  *****************************************************************************
 269  * This function is called when an error occured during thread main's loop. The
 270  * thread can still receive feed, but must be ready to terminate as soon as
 271  * possible.
 272  *****************************************************************************/
 273 static void ErrorThread( vpar_thread_t *p_vpar )
 274 {
 275     /* We take the lock, because we are going to read/write the start/end
 276      * indexes of the decoder fifo */
 277     vlc_mutex_lock( &p_vpar->p_fifo->data_lock );
 278
 279     /* Wait until a `die' order is sent */
 280     while( !p_vpar->p_fifo->b_die )
 281     {
 282         /* Trash all received PES packets */
 283         while( !DECODER_FIFO_ISEMPTY(*p_vpar->p_fifo) )
 284         {
 285             p_vpar->p_fifo->pf_delete_pes( p_vpar->p_fifo->p_packets_mgt,
 286                                   DECODER_FIFO_START(*p_vpar->p_fifo) );
 287             DECODER_FIFO_INCSTART( *p_vpar->p_fifo );
 288         }
 289
 290         /* Waiting for the input thread to put new PES packets in the fifo */
 291         vlc_cond_wait( &p_vpar->p_fifo->data_wait, &p_vpar->p_fifo->data_lock );
 292     }
 293
 294     /* We can release the lock before leaving */
 295     vlc_mutex_unlock( &p_vpar->p_fifo->data_lock );
 296 }
 297
 298 /*****************************************************************************
 299  * EndThread: thread destruction
 300  *****************************************************************************
 301  * This function is called when the thread ends after a sucessful
 302  * initialization.
 303  *****************************************************************************/
 304 static void EndThread( vpar_thread_t *p_vpar )
 305 {
 306 #ifdef VDEC_SMP
 307     int i_dummy;
 308 #endif
 309
 310     intf_DbgMsg("vpar debug: destroying video parser thread %p", p_vpar);
 311
 312 #ifdef STATS
 313     intf_Msg("vpar stats: %d loops among %d sequence(s)",
 314              p_vpar->c_loops, p_vpar->c_sequences);
 315
 316     {
 317         struct tms cpu_usage;
 318         times( &cpu_usage );
 319
 320         intf_Msg("vpar stats: cpu usage (user: %d, system: %d)",
 321                  cpu_usage.tms_utime, cpu_usage.tms_stime);
 322     }
 323
 324     intf_Msg("vpar stats: Read %d frames/fields (I %d/P %d/B %d)",
 325              p_vpar->pc_pictures[I_CODING_TYPE]
 326              + p_vpar->pc_pictures[P_CODING_TYPE]
 327              + p_vpar->pc_pictures[B_CODING_TYPE],
 328              p_vpar->pc_pictures[I_CODING_TYPE],
 329              p_vpar->pc_pictures[P_CODING_TYPE],
 330              p_vpar->pc_pictures[B_CODING_TYPE]);
 331     intf_Msg("vpar stats: Decoded %d frames/fields (I %d/P %d/B %d)",
 332              p_vpar->pc_decoded_pictures[I_CODING_TYPE]
 333              + p_vpar->pc_decoded_pictures[P_CODING_TYPE]
 334              + p_vpar->pc_decoded_pictures[B_CODING_TYPE],
 335              p_vpar->pc_decoded_pictures[I_CODING_TYPE],
 336              p_vpar->pc_decoded_pictures[P_CODING_TYPE],
 337              p_vpar->pc_decoded_pictures[B_CODING_TYPE]);
 338     intf_Msg("vpar stats: Read %d malformed frames/fields (I %d/P %d/B %d)",
 339              p_vpar->pc_malformed_pictures[I_CODING_TYPE]
 340              + p_vpar->pc_malformed_pictures[P_CODING_TYPE]
 341              + p_vpar->pc_malformed_pictures[B_CODING_TYPE],
 342              p_vpar->pc_malformed_pictures[I_CODING_TYPE],
 343              p_vpar->pc_malformed_pictures[P_CODING_TYPE],
 344              p_vpar->pc_malformed_pictures[B_CODING_TYPE]);
 345 #define S   p_vpar->sequence
 346     intf_Msg("vpar info: %s stream (%dx%d), %d.%d pi/s",
 347              S.b_mpeg2 ? "MPEG-2" : "MPEG-1",
 348              S.i_width, S.i_height, S.i_frame_rate/1001, S.i_frame_rate % 1001);
 349     intf_Msg("vpar info: %s, %s, matrix_coeff: %d",
 350              S.b_progressive ? "Progressive" : "Non-progressive",
 351              S.i_scalable_mode ? "scalable" : "non-scalable",
 352              S.i_matrix_coefficients);
 353 #endif
 354
 355     /* Dispose of matrices if they have been allocated. */
 356     if( p_vpar->sequence.intra_quant.b_allocated )
 357     {
 358         free( p_vpar->sequence.intra_quant.pi_matrix );
 359     }
 360     if( p_vpar->sequence.nonintra_quant.b_allocated )
 361     {
 362         free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
 363     }
 364     if( p_vpar->sequence.chroma_intra_quant.b_allocated )
 365     {
 366         free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
 367     }
 368     if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
 369     {
 370         free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
 371     }
 372
 373 #ifdef VDEC_SMP
 374     /* Destroy vdec threads */
 375     for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
 376     {
 377         if( p_vpar->pp_vdec[i_dummy] != NULL )
 378             vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
 379         else
 380             break;
 381     }
 382 #else
 383     free( p_vpar->pp_vdec[0] );
 384 #endif
 385
 386     free( p_vpar->p_config );
 387     free( p_vpar );
 388
 389     intf_DbgMsg("vpar debug: EndThread(%p)", p_vpar);
 390 }