git.sesse.net Git - vlc/blob - plugins/ffmpeg/ffmpeg.c

   1 /*****************************************************************************
   2  * ffmpeg.c: video decoder using ffmpeg library
   3  *****************************************************************************
   4  * Copyright (C) 1999-2001 VideoLAN
   5  * $Id: ffmpeg.c,v 1.20 2002/07/23 17:19:02 fenrir Exp $
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <stdlib.h>                                      /* malloc(), free() */
  28
  29 #include <vlc/vlc.h>
  30 #include <vlc/vout.h>
  31 #include <vlc/decoder.h>
  32 #include <vlc/input.h>
  33
  34 #ifdef HAVE_UNISTD_H
  35 #include <unistd.h>                                              /* getpid() */
  36 #endif
  37
  38 #include <errno.h>
  39 #include <string.h>
  40
  41 #ifdef HAVE_SYS_TIMES_H
  42 #   include <sys/times.h>
  43 #endif
  44
  45 #include "vdec_ext-plugins.h"
  46 #include "avcodec.h"                                            /* ffmpeg */
  47 #include "ffmpeg.h"
  48
  49 /*
  50  * Local prototypes
  51  */
  52 static int      decoder_Probe   ( vlc_fourcc_t * );
  53 static int      decoder_Run     ( decoder_fifo_t * );
  54 static int      InitThread      ( videodec_thread_t * );
  55 static void     EndThread       ( videodec_thread_t * );
  56 static void     DecodeThread    ( videodec_thread_t * );
  57
  58
  59 static int      b_ffmpeginit = 0;
  60
  61 /*****************************************************************************
  62  * Capabilities
  63  *****************************************************************************/
  64 void _M( vdec_getfunctions )( function_list_t * p_function_list )
  65 {
  66     p_function_list->functions.dec.pf_probe = decoder_Probe;
  67     p_function_list->functions.dec.pf_run   = decoder_Run;
  68 }
  69
  70 /*****************************************************************************
  71  * Build configuration tree.
  72  *****************************************************************************/
  73
  74 #define ERROR_RESILIENCE_LONGTEXT \
  75     "ffmpeg can make errors resiliences.          \n"\
  76     "Nevertheless, with buggy encoder (like ISO MPEG-4 encoder from M$) " \
  77     "this will produce a lot of errors.\n" \
  78     "Valid range is -1 to 99 (-1 disable all errors resiliences)."
  79
  80 #define HURRY_UP_LONGTEXT \
  81     "Allow the decoder to partially decode or skip frame(s) " \
  82     "when there not enough time.\n It's usefull with low CPU power " \
  83     "but it could produce broken pictures."
  84
  85 MODULE_CONFIG_START
  86 ADD_CATEGORY_HINT( N_("Miscellaneous"), NULL )
  87 #if LIBAVCODEC_BUILD >= 4611
  88   ADD_INTEGER ( "ffmpeg-error-resilience", 0, NULL,
  89                 "error resilience", ERROR_RESILIENCE_LONGTEXT )
  90   ADD_INTEGER ( "ffmpeg-workaround-bugs", 0, NULL,
  91                 "workaround bugs", "0-99, seems to be for msmpeg v3\n"  )
  92 #endif
  93   ADD_BOOL( "ffmpeg-hurry-up", 0, NULL, "hurry up", HURRY_UP_LONGTEXT )
  94
  95 MODULE_CONFIG_STOP
  96
  97 MODULE_INIT_START
  98     SET_DESCRIPTION( "ffmpeg video decoder((MS)MPEG4,SVQ1,H263)" )
  99     ADD_CAPABILITY( DECODER, 70 )
 100 MODULE_INIT_STOP
 101
 102 MODULE_ACTIVATE_START
 103     _M( vdec_getfunctions )( &p_module->p_functions->dec );
 104 MODULE_ACTIVATE_STOP
 105
 106 MODULE_DEACTIVATE_START
 107 MODULE_DEACTIVATE_STOP
 108
 109
 110 /*****************************************************************************
 111  * decoder_Probe: probe the decoder and return score
 112  *****************************************************************************
 113  * Tries to launch a decoder and return score so that the interface is able
 114  * to chose.
 115  *****************************************************************************/
 116 static int decoder_Probe( vlc_fourcc_t *pi_type )
 117 {
 118     return( ffmpeg_GetFfmpegCodec( *pi_type, NULL, NULL ) ? 0 : -1 );
 119 }
 120
 121 /*****************************************************************************
 122  * decoder_Run: this function is called just after the thread is created
 123  *****************************************************************************/
 124 static int decoder_Run ( decoder_fifo_t * p_fifo )
 125 {
 126     videodec_thread_t   *p_vdec;
 127     int b_error;
 128
 129     if ( !(p_vdec = (videodec_thread_t*)malloc( sizeof(videodec_thread_t))) )
 130     {
 131         msg_Err( p_fifo, "out of memory" );
 132         DecoderError( p_fifo );
 133         return( -1 );
 134     }
 135     memset( p_vdec, 0, sizeof( videodec_thread_t ) );
 136
 137     p_vdec->p_fifo = p_fifo;
 138
 139     if( InitThread( p_vdec ) != 0 )
 140     {
 141         DecoderError( p_fifo );
 142         return( -1 );
 143     }
 144
 145     while( (!p_vdec->p_fifo->b_die) && (!p_vdec->p_fifo->b_error) )
 146     {
 147         DecodeThread( p_vdec );
 148     }
 149
 150     if( ( b_error = p_vdec->p_fifo->b_error ) )
 151     {
 152         DecoderError( p_vdec->p_fifo );
 153     }
 154
 155     EndThread( p_vdec );
 156
 157     if( b_error )
 158     {
 159         return( -1 );
 160     }
 161
 162     return( 0 );
 163 }
 164
 165
 166 /*****************************************************************************
 167  * locales Functions
 168  *****************************************************************************/
 169
 170 #define GetWLE( p ) \
 171     ( *(u8*)(p) + ( *((u8*)(p)+1) << 8 ) )
 172
 173 #define GetDWLE( p ) \
 174     (  *(u8*)(p) + ( *((u8*)(p)+1) << 8 ) + \
 175       ( *((u8*)(p)+2) << 16 ) + ( *((u8*)(p)+3) << 24 ) )
 176
 177 static void ffmpeg_ParseBitMapInfoHeader( bitmapinfoheader_t *p_bh,
 178                                           u8 *p_data )
 179 {
 180     p_bh->i_size          = GetDWLE( p_data );
 181     p_bh->i_width         = GetDWLE( p_data + 4 );
 182     p_bh->i_height        = GetDWLE( p_data + 8 );
 183     p_bh->i_planes        = GetWLE( p_data + 12 );
 184     p_bh->i_bitcount      = GetWLE( p_data + 14 );
 185     p_bh->i_compression   = GetDWLE( p_data + 16 );
 186     p_bh->i_sizeimage     = GetDWLE( p_data + 20 );
 187     p_bh->i_xpelspermeter = GetDWLE( p_data + 24 );
 188     p_bh->i_ypelspermeter = GetDWLE( p_data + 28 );
 189     p_bh->i_clrused       = GetDWLE( p_data + 32 );
 190     p_bh->i_clrimportant  = GetDWLE( p_data + 36 );
 191
 192     if( p_bh->i_size > 40 )
 193     {
 194         p_bh->i_data = p_bh->i_size - 40;
 195         p_bh->p_data = malloc( p_bh->i_data );
 196         memcpy( p_bh->p_data, p_data + 40, p_bh->i_data );
 197     }
 198     else
 199     {
 200         p_bh->i_data = 0;
 201         p_bh->p_data = NULL;
 202     }
 203
 204 }
 205 /* get the first pes from fifo */
 206 static pes_packet_t *__PES_GET( decoder_fifo_t *p_fifo )
 207 {
 208     pes_packet_t *p_pes;
 209
 210     vlc_mutex_lock( &p_fifo->data_lock );
 211
 212     /* if fifo is emty wait */
 213     while( !p_fifo->p_first )
 214     {
 215         if( p_fifo->b_die )
 216         {
 217             vlc_mutex_unlock( &p_fifo->data_lock );
 218             return( NULL );
 219         }
 220         vlc_cond_wait( &p_fifo->data_wait, &p_fifo->data_lock );
 221     }
 222     p_pes = p_fifo->p_first;
 223
 224     vlc_mutex_unlock( &p_fifo->data_lock );
 225
 226     return( p_pes );
 227 }
 228
 229 /* free the first pes and go to next */
 230 static void __PES_NEXT( decoder_fifo_t *p_fifo )
 231 {
 232     pes_packet_t *p_next;
 233
 234     vlc_mutex_lock( &p_fifo->data_lock );
 235
 236     p_next = p_fifo->p_first->p_next;
 237     p_fifo->p_first->p_next = NULL;
 238     input_DeletePES( p_fifo->p_packets_mgt, p_fifo->p_first );
 239     p_fifo->p_first = p_next;
 240     p_fifo->i_depth--;
 241
 242     if( !p_fifo->p_first )
 243     {
 244         /* No PES in the fifo */
 245         /* pp_last no longer valid */
 246         p_fifo->pp_last = &p_fifo->p_first;
 247         while( !p_fifo->p_first )
 248         {
 249             vlc_cond_signal( &p_fifo->data_wait );
 250             vlc_cond_wait( &p_fifo->data_wait, &p_fifo->data_lock );
 251         }
 252     }
 253     vlc_mutex_unlock( &p_fifo->data_lock );
 254 }
 255
 256 static inline void __GetFrame( videodec_thread_t *p_vdec )
 257 {
 258     pes_packet_t  *p_pes;
 259     data_packet_t *p_data;
 260     byte_t        *p_buffer;
 261
 262     p_pes = __PES_GET( p_vdec->p_fifo );
 263     p_vdec->i_pts = p_pes->i_pts;
 264
 265     while( ( !p_pes->i_nb_data )||( !p_pes->i_pes_size ) )
 266     {
 267         __PES_NEXT( p_vdec->p_fifo );
 268         p_pes = __PES_GET( p_vdec->p_fifo );
 269     }
 270     p_vdec->i_framesize = p_pes->i_pes_size;
 271     if( p_pes->i_nb_data == 1 )
 272     {
 273         p_vdec->p_framedata = p_pes->p_first->p_payload_start;
 274         return;
 275     }
 276     /* get a buffer and gather all data packet */
 277     p_vdec->p_framedata = p_buffer = malloc( p_pes->i_pes_size );
 278     p_data = p_pes->p_first;
 279     do
 280     {
 281         p_vdec->p_fifo->p_vlc->pf_memcpy( p_buffer, p_data->p_payload_start,
 282                      p_data->p_payload_end - p_data->p_payload_start );
 283         p_buffer += p_data->p_payload_end - p_data->p_payload_start;
 284         p_data = p_data->p_next;
 285     } while( p_data );
 286 }
 287
 288 static inline void __NextFrame( videodec_thread_t *p_vdec )
 289 {
 290     pes_packet_t  *p_pes;
 291
 292     p_pes = __PES_GET( p_vdec->p_fifo );
 293     if( p_pes->i_nb_data != 1 )
 294     {
 295         free( p_vdec->p_framedata ); /* FIXME keep this buffer */
 296     }
 297     __PES_NEXT( p_vdec->p_fifo );
 298 }
 299
 300 /* FIXME FIXME some of them are wrong */
 301 static int i_ffmpeg_PixFmtToChroma[] =
 302 {
 303 /* PIX_FMT_ANY = -1,PIX_FMT_YUV420P, PIX_FMT_YUV422,
 304    PIX_FMT_RGB24, PIX_FMT_BGR24, PIX_FMT_YUV422P,
 305    PIX_FMT_YUV444P, PIX_FMT_YUV410P */
 306
 307     0, VLC_FOURCC('I','4','2','0'), VLC_FOURCC('I','4','2','0'),
 308     VLC_FOURCC('R','V','2','4'), 0, VLC_FOURCC('Y','4','2','2'),
 309     VLC_FOURCC('I','4','4','4'), 0
 310 };
 311
 312 static inline u32 ffmpeg_PixFmtToChroma( int i_ffmpegchroma )
 313 {
 314     if( ++i_ffmpegchroma > 7 )
 315     {
 316         return( 0 );
 317     }
 318     else
 319     {
 320         return( i_ffmpeg_PixFmtToChroma[i_ffmpegchroma] );
 321     }
 322 }
 323
 324 static inline int ffmpeg_FfAspect( int i_width, int i_height, int i_ffaspect )
 325 {
 326     switch( i_ffaspect )
 327     {
 328         case( FF_ASPECT_4_3_625 ):
 329         case( FF_ASPECT_4_3_525 ):
 330             return( VOUT_ASPECT_FACTOR * 4 / 3);
 331         case( FF_ASPECT_16_9_625 ):
 332         case( FF_ASPECT_16_9_525 ):
 333             return( VOUT_ASPECT_FACTOR * 16 / 9 );
 334         case( FF_ASPECT_SQUARE ):
 335         default:
 336             return( VOUT_ASPECT_FACTOR * i_width / i_height );
 337     }
 338 }
 339
 340 static int ffmpeg_CheckVout( vout_thread_t *p_vout,
 341                              int i_width,
 342                              int i_height,
 343                              int i_aspect,
 344                              int i_chroma )
 345 {
 346     if( !p_vout )
 347     {
 348         return( 0 );
 349     }
 350     if( !i_chroma )
 351     {
 352         /* we will try to make conversion */
 353         i_chroma = VLC_FOURCC('I','4','2','0');
 354     }
 355
 356     if( ( p_vout->render.i_width != i_width )||
 357         ( p_vout->render.i_height != i_height )||
 358         ( p_vout->render.i_chroma != i_chroma )||
 359         ( p_vout->render.i_aspect !=
 360                 ffmpeg_FfAspect( i_width, i_height, i_aspect ) ) )
 361     {
 362         return( 0 );
 363     }
 364     else
 365     {
 366         return( 1 );
 367     }
 368 }
 369
 370 /* Return a Vout */
 371
 372 static vout_thread_t *ffmpeg_CreateVout( videodec_thread_t *p_vdec,
 373                                          int i_width,
 374                                          int i_height,
 375                                          int i_aspect,
 376                                          int i_chroma )
 377 {
 378     vout_thread_t *p_vout;
 379
 380     if( (!i_width)||(!i_height) )
 381     {
 382         return( NULL ); /* Can't create a new vout without display size */
 383     }
 384
 385     if( !i_chroma )
 386     {
 387         /* we make conversion if possible*/
 388         i_chroma = VLC_FOURCC('I','4','2','0');
 389         msg_Warn( p_vdec->p_fifo, "Internal chroma conversion (FIXME)");
 390         /* It's mainly for I410 -> I420 conversion that I've made,
 391            it's buggy and very slow */
 392     }
 393
 394     i_aspect = ffmpeg_FfAspect( i_width, i_height, i_aspect );
 395
 396     /* Spawn a video output if there is none. First we look for our children,
 397      * then we look for any other vout that might be available. */
 398     p_vout = vlc_object_find( p_vdec->p_fifo, VLC_OBJECT_VOUT,
 399                                               FIND_CHILD );
 400     if( !p_vout )
 401     {
 402         p_vout = vlc_object_find( p_vdec->p_fifo, VLC_OBJECT_VOUT,
 403                                                   FIND_ANYWHERE );
 404     }
 405
 406     if( p_vout )
 407     {
 408         if( !ffmpeg_CheckVout( p_vout,
 409                                i_width, i_height, i_aspect,i_chroma ) )
 410         {
 411             /* We are not interested in this format, close this vout */
 412             vlc_object_detach_all( p_vout );
 413             vlc_object_release( p_vout );
 414             vout_DestroyThread( p_vout );
 415             p_vout = NULL;
 416         }
 417         else
 418         {
 419             /* This video output is cool! Hijack it. */
 420             vlc_object_detach_all( p_vout );
 421             vlc_object_attach( p_vout, p_vdec->p_fifo );
 422             vlc_object_release( p_vout );
 423         }
 424     }
 425
 426     if( p_vout == NULL )
 427     {
 428         msg_Dbg( p_vdec->p_fifo, "no vout present, spawning one" );
 429
 430         p_vout = vout_CreateThread( p_vdec->p_fifo,
 431                                     i_width,
 432                                     i_height,
 433                                     i_chroma,
 434                                     i_aspect );
 435     }
 436
 437     return( p_vout );
 438 }
 439
 440 /* FIXME FIXME FIXME this is a big shit
 441    does someone want to rewrite this function ?
 442    or said to me how write a better thing
 443    FIXME FIXME FIXME
 444 */
 445
 446 static void ffmpeg_ConvertPictureI410toI420( picture_t *p_pic,
 447                                              AVPicture *p_avpicture,
 448                                              videodec_thread_t   *p_vdec )
 449 {
 450     u8 *p_src, *p_dst;
 451     u8 *p_plane[3];
 452     int i_plane;
 453
 454     int i_stride, i_lines;
 455     int i_height, i_width;
 456     int i_y, i_x;
 457
 458     i_height = p_vdec->p_context->height;
 459     i_width  = p_vdec->p_context->width;
 460
 461     p_dst = p_pic->p[0].p_pixels;
 462     p_src  = p_avpicture->data[0];
 463
 464     /* copy first plane */
 465     for( i_y = 0; i_y < i_height; i_y++ )
 466     {
 467         p_vdec->p_fifo->p_vlc->pf_memcpy( p_dst, p_src, i_width);
 468         p_dst += p_pic->p[0].i_pitch;
 469         p_src += p_avpicture->linesize[0];
 470     }
 471
 472     /* process each plane in a temporary buffer */
 473     for( i_plane = 1; i_plane < 3; i_plane++ )
 474     {
 475         i_stride = p_avpicture->linesize[i_plane];
 476         i_lines = i_height / 4;
 477
 478         p_dst = p_plane[i_plane] = malloc( i_lines * i_stride * 2 * 2 );
 479         p_src  = p_avpicture->data[i_plane];
 480
 481         /* for each source line */
 482         for( i_y = 0; i_y < i_lines; i_y++ )
 483         {
 484             for( i_x = 0; i_x < i_stride - 1; i_x++ )
 485             {
 486                 p_dst[2 * i_x    ] = p_src[i_x];
 487                 p_dst[2 * i_x + 1] = ( p_src[i_x] + p_src[i_x + 1]) / 2;
 488
 489             }
 490             p_dst[2 * i_stride - 2] = p_src[i_x];
 491             p_dst[2 * i_stride - 1] = p_src[i_x];
 492
 493             p_dst += 4 * i_stride; /* process the next even lines */
 494             p_src += i_stride;
 495         }
 496
 497
 498     }
 499
 500     for( i_plane = 1; i_plane < 3; i_plane++ )
 501     {
 502         i_stride = p_avpicture->linesize[i_plane];
 503         i_lines = i_height / 4;
 504
 505         p_dst = p_plane[i_plane] + 2*i_stride;
 506         p_src  = p_plane[i_plane];
 507
 508         for( i_y = 0; i_y < i_lines - 1; i_y++ )
 509         {
 510             for( i_x = 0; i_x <  2 * i_stride ; i_x++ )
 511             {
 512                 p_dst[i_x] = ( p_src[i_x] + p_src[i_x + 4*i_stride])/2;
 513             }
 514
 515             p_dst += 4 * i_stride; /* process the next odd lines */
 516             p_src += 4 * i_stride;
 517         }
 518         /* last line */
 519         p_vdec->p_fifo->p_vlc->pf_memcpy( p_dst, p_src, 2*i_stride );
 520     }
 521     /* copy to p_pic, by block
 522        if I do pixel per pixel it segfault. It's why I use
 523        temporaries buffers */
 524     for( i_plane = 1; i_plane < 3; i_plane++ )
 525     {
 526
 527         int i_size;
 528         p_src  = p_plane[i_plane];
 529         p_dst = p_pic->p[i_plane].p_pixels;
 530
 531         i_size = __MIN( 2*i_stride, p_pic->p[i_plane].i_pitch);
 532         for( i_y = 0; i_y < __MIN(p_pic->p[i_plane].i_lines, 2 * i_lines); i_y++ )
 533         {
 534             p_vdec->p_fifo->p_vlc->pf_memcpy( p_dst, p_src, i_size );
 535             p_src += 2 * i_stride;
 536             p_dst += p_pic->p[i_plane].i_pitch;
 537         }
 538         free( p_plane[i_plane] );
 539     }
 540
 541 }
 542
 543 static void ffmpeg_ConvertPicture( picture_t *p_pic,
 544                                    AVPicture *p_avpicture,
 545                                    videodec_thread_t   *p_vdec )
 546 {
 547     int i_plane;
 548     int i_size;
 549     int i_line;
 550
 551     u8  *p_dst;
 552     u8  *p_src;
 553     int i_src_stride;
 554     int i_dst_stride;
 555
 556     if( ffmpeg_PixFmtToChroma( p_vdec->p_context->pix_fmt ) )
 557     {
 558         /* convert ffmpeg picture to our format */
 559         for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 560         {
 561             p_src  = p_avpicture->data[i_plane];
 562             p_dst = p_pic->p[i_plane].p_pixels;
 563             i_src_stride = p_avpicture->linesize[i_plane];
 564             i_dst_stride = p_pic->p[i_plane].i_pitch;
 565
 566             i_size = __MIN( i_src_stride, i_dst_stride );
 567             for( i_line = 0; i_line < p_pic->p[i_plane].i_lines; i_line++ )
 568             {
 569                 p_vdec->p_fifo->p_vlc->pf_memcpy( p_dst, p_src, i_size );
 570                 p_src += i_src_stride;
 571                 p_dst += i_dst_stride;
 572             }
 573         }
 574         return;
 575     }
 576
 577     /* we need to convert to I420 */
 578     switch( p_vdec->p_context->pix_fmt )
 579     {
 580 #if LIBAVCODEC_BUILD >= 4615
 581         case( PIX_FMT_YUV410P ):
 582             ffmpeg_ConvertPictureI410toI420( p_pic, p_avpicture, p_vdec );
 583             break;
 584 #endif
 585         default:
 586             p_vdec->p_fifo->b_error =1;
 587             break;
 588     }
 589 }
 590
 591
 592 /*****************************************************************************
 593  *
 594  * Functions that initialize, decode and end the decoding process
 595  *
 596  *****************************************************************************/
 597
 598 /*****************************************************************************
 599  * InitThread: initialize vdec output thread
 600  *****************************************************************************
 601  * This function is called from decoder_Run and performs the second step
 602  * of the initialization. It returns 0 on success. Note that the thread's
 603  * flag are not modified inside this function.
 604  *****************************************************************************/
 605
 606 static int InitThread( videodec_thread_t *p_vdec )
 607 {
 608     int i_ffmpeg_codec;
 609     int i_tmp;
 610
 611     if( p_vdec->p_fifo->p_demux_data )
 612     {
 613         ffmpeg_ParseBitMapInfoHeader( &p_vdec->format,
 614                                       (u8*)p_vdec->p_fifo->p_demux_data );
 615     }
 616     else
 617     {
 618         msg_Warn( p_vdec->p_fifo, "display informations missing" );
 619     }
 620
 621     /*init ffmpeg */
 622     if( !b_ffmpeginit )
 623     {
 624         avcodec_init();
 625         avcodec_register_all();
 626         b_ffmpeginit = 1;
 627         msg_Dbg( p_vdec->p_fifo, "library ffmpeg initialized" );
 628     }
 629     else
 630     {
 631         msg_Dbg( p_vdec->p_fifo, "library ffmpeg already initialized" );
 632     }
 633     ffmpeg_GetFfmpegCodec( p_vdec->p_fifo->i_fourcc,
 634                            &i_ffmpeg_codec,
 635                            &p_vdec->psz_namecodec );
 636     p_vdec->p_codec =
 637         avcodec_find_decoder( i_ffmpeg_codec );
 638
 639     if( !p_vdec->p_codec )
 640     {
 641         msg_Err( p_vdec->p_fifo, "codec not found (%s)",
 642                                  p_vdec->psz_namecodec );
 643         return( -1 );
 644     }
 645
 646     p_vdec->p_context = &p_vdec->context;
 647     memset( p_vdec->p_context, 0, sizeof( AVCodecContext ) );
 648
 649     p_vdec->p_context->width  = p_vdec->format.i_width;
 650     p_vdec->p_context->height = p_vdec->format.i_height;
 651
 652 /*  XXX
 653     p_vdec->p_context->workaround_bugs
 654       --> seems to be for msmpeg 3 but can't know what is supposed to do
 655
 656     p_vdec->p_context->strict_std_compliance
 657       --> strictly follow mpeg4 standard for decoder or encoder ??
 658
 659     p_vdec->p_context->error_resilience
 660       --> don't make error resilience, because of some ms encoder witch
 661       use some wrong VLC code.
 662 */
 663
 664 #if LIBAVCODEC_BUILD >= 4611
 665     i_tmp = config_GetInt( p_vdec->p_fifo, "ffmpeg-workaround-bugs" );
 666     p_vdec->p_context->workaround_bugs  = __MAX( __MIN( i_tmp, 99 ), 0 );
 667
 668     i_tmp = config_GetInt( p_vdec->p_fifo, "ffmpeg-error-resilience" );
 669     p_vdec->p_context->error_resilience = __MAX( __MIN( i_tmp, 99 ), -1 );
 670 #endif
 671 #if LIBAVCODEC_BUILD >= 4614
 672     if( config_GetInt( p_vdec->p_fifo, "grayscale" ) )
 673     {
 674         p_vdec->p_context->flags|= CODEC_FLAG_GRAY;
 675     }
 676 #endif
 677
 678     if (avcodec_open(p_vdec->p_context, p_vdec->p_codec) < 0)
 679     {
 680         msg_Err( p_vdec->p_fifo, "cannot open codec (%s)",
 681                                  p_vdec->psz_namecodec );
 682         return( -1 );
 683     }
 684     else
 685     {
 686         msg_Dbg( p_vdec->p_fifo, "ffmpeg codec (%s) started",
 687                                  p_vdec->psz_namecodec );
 688     }
 689
 690     /* first give init data */
 691     if( p_vdec->format.i_data )
 692     {
 693         AVPicture avpicture;
 694         int b_gotpicture;
 695
 696         switch( i_ffmpeg_codec )
 697         {
 698             case( CODEC_ID_MPEG4 ):
 699                 avcodec_decode_video( p_vdec->p_context, &avpicture,
 700                                       &b_gotpicture,
 701                                       p_vdec->format.p_data,
 702                                       p_vdec->format.i_data );
 703                 break;
 704             default:
 705                 break;
 706         }
 707     }
 708
 709     /* This will be created after the first decoded frame */
 710     p_vdec->p_vout = NULL;
 711
 712     return( 0 );
 713 }
 714
 715 /*****************************************************************************
 716  * DecodeThread: Called for decode one frame
 717  *****************************************************************************/
 718 static void  DecodeThread( videodec_thread_t *p_vdec )
 719 {
 720     int     i_status;
 721     int     b_drawpicture;
 722     int     b_gotpicture;
 723     AVPicture avpicture;  /* ffmpeg picture */
 724     picture_t *p_pic; /* videolan picture */
 725     /* we have to get a frame stored in a pes
 726        give it to ffmpeg decoder
 727        and send the image to the output */
 728
 729     /* TODO implement it in a better way */
 730
 731     if( ( config_GetInt(p_vdec->p_fifo, "ffmpeg-hurry-up") )&&
 732         ( p_vdec->i_frame_late > 4 ) )
 733     {
 734 #if LIBAVCODEC_BUILD > 4603
 735         b_drawpicture = 0;
 736         if( p_vdec->i_frame_late < 8 )
 737         {
 738             p_vdec->p_context->hurry_up = 2;
 739         }
 740         else
 741         {
 742             /* too much late picture, won't decode
 743                but break picture until a new I, and for mpeg4 ...*/
 744             p_vdec->i_frame_late--; /* needed else it will never be decrease */
 745             __PES_NEXT( p_vdec->p_fifo );
 746             return;
 747         }
 748 #else
 749         if( p_vdec->i_frame_late < 8 )
 750         {
 751             b_drawpicture = 0; /* not really good but .. */
 752         }
 753         else
 754         {
 755             /* too much late picture, won't decode
 756                but break picture until a new I, and for mpeg4 ...*/
 757             p_vdec->i_frame_late--; /* needed else it will never be decrease */
 758             __PES_NEXT( p_vdec->p_fifo );
 759             return;
 760         }
 761 #endif
 762     }
 763     else
 764     {
 765         b_drawpicture = 1;
 766 #if LIBAVCODEC_BUILD > 4603
 767         p_vdec->p_context->hurry_up = 0;
 768 #endif
 769     }
 770
 771     __GetFrame( p_vdec );
 772
 773     i_status = avcodec_decode_video( p_vdec->p_context,
 774                                      &avpicture,
 775                                      &b_gotpicture,
 776                                      p_vdec->p_framedata,
 777                                      p_vdec->i_framesize);
 778
 779     __NextFrame( p_vdec );
 780
 781     if( i_status < 0 )
 782     {
 783         msg_Warn( p_vdec->p_fifo, "cannot decode one frame (%d bytes)",
 784                                   p_vdec->i_framesize );
 785         p_vdec->i_frame_error++;
 786         return;
 787     }
 788     /* Update frame late count*/
 789     /* I don't make statistic on decoding time */
 790     if( p_vdec->i_pts <= mdate())
 791     {
 792         p_vdec->i_frame_late++;
 793     }
 794     else
 795     {
 796         p_vdec->i_frame_late = 0;
 797     }
 798
 799     if( !b_gotpicture || avpicture.linesize[0] == 0 || !b_drawpicture)
 800     {
 801         return;
 802     }
 803
 804     /* Check our vout */
 805     if( !ffmpeg_CheckVout( p_vdec->p_vout,
 806                            p_vdec->p_context->width,
 807                            p_vdec->p_context->height,
 808                            p_vdec->p_context->aspect_ratio_info,
 809                            ffmpeg_PixFmtToChroma(p_vdec->p_context->pix_fmt)) )
 810     {
 811         p_vdec->p_vout =
 812           ffmpeg_CreateVout( p_vdec,
 813                              p_vdec->p_context->width,
 814                              p_vdec->p_context->height,
 815                              p_vdec->p_context->aspect_ratio_info,
 816                              ffmpeg_PixFmtToChroma(p_vdec->p_context->pix_fmt));
 817         if( !p_vdec->p_vout )
 818         {
 819             msg_Err( p_vdec->p_fifo, "cannot create vout" );
 820             p_vdec->p_fifo->b_error = 1; /* abort */
 821             return;
 822         }
 823     }
 824
 825     /* Send decoded frame to vout */
 826     while( !(p_pic = vout_CreatePicture( p_vdec->p_vout, 0, 0, 0 ) ) )
 827     {
 828         if( p_vdec->p_fifo->b_die || p_vdec->p_fifo->b_error )
 829         {
 830             return;
 831         }
 832         msleep( VOUT_OUTMEM_SLEEP );
 833     }
 834
 835     ffmpeg_ConvertPicture( p_pic,
 836                            &avpicture,
 837                            p_vdec );
 838
 839
 840     /* FIXME correct avi and use i_dts */
 841     vout_DatePicture( p_vdec->p_vout, p_pic, p_vdec->i_pts);
 842     vout_DisplayPicture( p_vdec->p_vout, p_pic );
 843
 844     return;
 845 }
 846
 847
 848 /*****************************************************************************
 849  * EndThread: thread destruction
 850  *****************************************************************************
 851  * This function is called when the thread ends after a sucessful
 852  * initialization.
 853  *****************************************************************************/
 854 static void EndThread( videodec_thread_t *p_vdec )
 855 {
 856     if( !p_vdec )
 857     {
 858         return;
 859     }
 860
 861     if( p_vdec->p_context != NULL)
 862     {
 863         avcodec_close( p_vdec->p_context );
 864         msg_Dbg( p_vdec->p_fifo, "ffmpeg codec (%s) stopped",
 865                                  p_vdec->psz_namecodec );
 866     }
 867
 868     if( p_vdec->p_vout != NULL )
 869     {
 870         /* We are about to die. Reattach video output to p_vlc. */
 871         vlc_object_detach( p_vdec->p_vout, p_vdec->p_fifo );
 872         vlc_object_attach( p_vdec->p_vout, p_vdec->p_fifo->p_vlc );
 873     }
 874
 875     if( p_vdec->format.p_data != NULL)
 876     {
 877         free( p_vdec->format.p_data );
 878     }
 879
 880     free( p_vdec );
 881 }