git.sesse.net Git - vlc/blob - modules/codec/ffmpeg/ffmpeg.c

   1 /*****************************************************************************
   2  * ffmpeg.c: video decoder using ffmpeg library
   3  *****************************************************************************
   4  * Copyright (C) 1999-2001 VideoLAN
   5  * $Id: ffmpeg.c,v 1.6 2002/08/26 09:12:46 sam 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 "avcodec.h"                                            /* ffmpeg */
  46
  47 #include "postprocessing/postprocessing.h"
  48
  49 #include "ffmpeg.h"
  50
  51 /*
  52  * Local prototypes
  53  */
  54 static int      OpenDecoder     ( vlc_object_t * );
  55 static int      RunDecoder      ( decoder_fifo_t * );
  56 static int      InitThread      ( videodec_thread_t * );
  57 static void     EndThread       ( videodec_thread_t * );
  58 static void     DecodeThread    ( videodec_thread_t * );
  59
  60
  61 static int      b_ffmpeginit = 0;
  62
  63 /*****************************************************************************
  64  * Module descriptor
  65  *****************************************************************************/
  66
  67 #define ERROR_RESILIENCE_LONGTEXT \
  68     "ffmpeg can make errors resiliences.          \n"\
  69     "Nevertheless, with buggy encoder (like ISO MPEG-4 encoder from M$) " \
  70     "this will produce a lot of errors.\n" \
  71     "Valid range is -1 to 99 (-1 disable all errors resiliences)."
  72
  73 #define HURRY_UP_LONGTEXT \
  74     "Allow the decoder to partially decode or skip frame(s) " \
  75     "when there not enough time.\n It's usefull with low CPU power " \
  76     "but it could produce broken pictures."
  77
  78 #define POSTPROCESSING_Q_LONGTEXT \
  79     "Quality of post processing\n"\
  80     "Valid range is 0 to 6\n" \
  81     "( Overridden by others setting)"
  82
  83 #define POSTPROCESSING_AQ_LONGTEXT \
  84     "Post processing quality is selected upon time left" \
  85     "but no more than requested quality\n" \
  86     "Not yet implemented !"
  87
  88 vlc_module_begin();
  89     add_category_hint( N_("Ffmpeg"), NULL );
  90 #if LIBAVCODEC_BUILD >= 4611
  91     add_integer ( "ffmpeg-error-resilience", -1, NULL,
  92                   "error resilience", ERROR_RESILIENCE_LONGTEXT );
  93     add_integer ( "ffmpeg-workaround-bugs", 0, NULL,
  94                   "workaround bugs", "0-99, seems to be for msmpeg v3\n"  );
  95 #endif
  96     add_bool( "ffmpeg-hurry-up", 0, NULL, "hurry up", HURRY_UP_LONGTEXT );
  97
  98     add_category_hint( N_("Post processing"), NULL );
  99     add_module( "ffmpeg-pp", "postprocessing",NULL, NULL,
 100                 N_( "ffmpeg postprocessing module" ), NULL );
 101     add_integer( "ffmpeg-pp-q", 0, NULL,
 102                  "post processing quality", POSTPROCESSING_Q_LONGTEXT );
 103     add_bool( "ffmpeg-pp-auto", 0, NULL,
 104               "auto-level Post processing quality", POSTPROCESSING_AQ_LONGTEXT );
 105     add_bool( "ffmpeg-db-yv", 0, NULL,
 106               "force vertical luminance deblocking",
 107               "force vertical luminance deblocking (override other settings)" );
 108     add_bool( "ffmpeg-db-yh", 0, NULL,
 109               "force horizontal luminance deblocking",
 110               "force horizontal luminance deblocking (override other settings)" );
 111     add_bool( "ffmpeg-db-cv", 0, NULL,
 112               "force vertical chrominance deblocking",
 113               "force vertical chrominance deblocking (override other settings)" );
 114     add_bool( "ffmpeg-db-ch", 0, NULL,
 115               "force horizontal chrominance deblocking",
 116               "force horizontal chrominance deblocking (override other settings) " );
 117     add_bool( "ffmpeg-dr-y", 0, NULL,
 118               "force luminance deringing",
 119               "force luminance deringing (override other settings)" );
 120     add_bool( "ffmpeg-dr-c", 0, NULL,
 121               "force chrominance deringing",
 122               "force chrominance deringing (override other settings)" );
 123
 124     set_description( _("ffmpeg video decoder((MS)MPEG4,SVQ1,H263)") );
 125     set_capability( "decoder", 70 );
 126     set_callbacks( OpenDecoder, NULL );
 127 vlc_module_end();
 128
 129 /*****************************************************************************
 130  * OpenDecoder: probe the decoder and return score
 131  *****************************************************************************
 132  * Tries to launch a decoder and return score so that the interface is able
 133  * to chose.
 134  *****************************************************************************/
 135 static int OpenDecoder( vlc_object_t *p_this )
 136 {
 137     decoder_fifo_t *p_fifo = (decoder_fifo_t*) p_this;
 138
 139     if( ffmpeg_GetFfmpegCodec( p_fifo->i_fourcc, NULL, NULL ) )
 140     {
 141         p_fifo->pf_run = RunDecoder;
 142         return VLC_SUCCESS;
 143     }
 144
 145     return VLC_EGENERIC;
 146 }
 147
 148 /*****************************************************************************
 149  * RunDecoder: this function is called just after the thread is created
 150  *****************************************************************************/
 151 static int RunDecoder( decoder_fifo_t *p_fifo )
 152 {
 153     videodec_thread_t   *p_vdec;
 154     int b_error;
 155
 156     if ( !(p_vdec = (videodec_thread_t*)malloc( sizeof(videodec_thread_t))) )
 157     {
 158         msg_Err( p_fifo, "out of memory" );
 159         DecoderError( p_fifo );
 160         return( -1 );
 161     }
 162     memset( p_vdec, 0, sizeof( videodec_thread_t ) );
 163
 164     p_vdec->p_fifo = p_fifo;
 165
 166     if( InitThread( p_vdec ) != 0 )
 167     {
 168         DecoderError( p_fifo );
 169         return( -1 );
 170     }
 171
 172     while( (!p_vdec->p_fifo->b_die) && (!p_vdec->p_fifo->b_error) )
 173     {
 174         DecodeThread( p_vdec );
 175     }
 176
 177     if( ( b_error = p_vdec->p_fifo->b_error ) )
 178     {
 179         DecoderError( p_vdec->p_fifo );
 180     }
 181
 182     EndThread( p_vdec );
 183
 184     if( b_error )
 185     {
 186         return( -1 );
 187     }
 188
 189     return( 0 );
 190 }
 191
 192
 193 /*****************************************************************************
 194  * locales Functions
 195  *****************************************************************************/
 196
 197 #define GetWLE( p ) \
 198     ( *(u8*)(p) + ( *((u8*)(p)+1) << 8 ) )
 199
 200 #define GetDWLE( p ) \
 201     (  *(u8*)(p) + ( *((u8*)(p)+1) << 8 ) + \
 202       ( *((u8*)(p)+2) << 16 ) + ( *((u8*)(p)+3) << 24 ) )
 203
 204 #define FREE( p ) if( p ) free( p ); p = NULL
 205
 206 static void ffmpeg_ParseBitMapInfoHeader( bitmapinfoheader_t *p_bh,
 207                                           u8 *p_data )
 208 {
 209     p_bh->i_size          = GetDWLE( p_data );
 210     p_bh->i_width         = GetDWLE( p_data + 4 );
 211     p_bh->i_height        = GetDWLE( p_data + 8 );
 212     p_bh->i_planes        = GetWLE( p_data + 12 );
 213     p_bh->i_bitcount      = GetWLE( p_data + 14 );
 214     p_bh->i_compression   = GetDWLE( p_data + 16 );
 215     p_bh->i_sizeimage     = GetDWLE( p_data + 20 );
 216     p_bh->i_xpelspermeter = GetDWLE( p_data + 24 );
 217     p_bh->i_ypelspermeter = GetDWLE( p_data + 28 );
 218     p_bh->i_clrused       = GetDWLE( p_data + 32 );
 219     p_bh->i_clrimportant  = GetDWLE( p_data + 36 );
 220
 221     if( p_bh->i_size > 40 )
 222     {
 223         p_bh->i_data = p_bh->i_size - 40;
 224         if( ( p_bh->p_data = malloc( p_bh->i_data ) ) )
 225         {
 226             memcpy( p_bh->p_data, p_data + 40, p_bh->i_data );
 227         }
 228         else
 229         {
 230             p_bh->i_data = 0;
 231         }
 232     }
 233     else
 234     {
 235         p_bh->i_data = 0;
 236         p_bh->p_data = NULL;
 237     }
 238
 239 }
 240 /* get the first pes from fifo */
 241 static pes_packet_t *__PES_GET( decoder_fifo_t *p_fifo )
 242 {
 243     pes_packet_t *p_pes;
 244
 245     vlc_mutex_lock( &p_fifo->data_lock );
 246
 247     /* if fifo is emty wait */
 248     while( !p_fifo->p_first )
 249     {
 250         if( p_fifo->b_die )
 251         {
 252             vlc_mutex_unlock( &p_fifo->data_lock );
 253             return( NULL );
 254         }
 255         vlc_cond_wait( &p_fifo->data_wait, &p_fifo->data_lock );
 256     }
 257     p_pes = p_fifo->p_first;
 258
 259     vlc_mutex_unlock( &p_fifo->data_lock );
 260
 261     return( p_pes );
 262 }
 263
 264 /* free the first pes and go to next */
 265 static void __PES_NEXT( decoder_fifo_t *p_fifo )
 266 {
 267     pes_packet_t *p_next;
 268
 269     vlc_mutex_lock( &p_fifo->data_lock );
 270
 271     p_next = p_fifo->p_first->p_next;
 272     p_fifo->p_first->p_next = NULL;
 273     input_DeletePES( p_fifo->p_packets_mgt, p_fifo->p_first );
 274     p_fifo->p_first = p_next;
 275     p_fifo->i_depth--;
 276
 277     if( !p_fifo->p_first )
 278     {
 279         /* No PES in the fifo */
 280         /* pp_last no longer valid */
 281         p_fifo->pp_last = &p_fifo->p_first;
 282         while( !p_fifo->p_first )
 283         {
 284             vlc_cond_signal( &p_fifo->data_wait );
 285             vlc_cond_wait( &p_fifo->data_wait, &p_fifo->data_lock );
 286         }
 287     }
 288     vlc_mutex_unlock( &p_fifo->data_lock );
 289 }
 290
 291 static inline void __GetFrame( videodec_thread_t *p_vdec )
 292 {
 293     pes_packet_t  *p_pes;
 294     data_packet_t *p_data;
 295     byte_t        *p_buffer;
 296
 297     p_pes = __PES_GET( p_vdec->p_fifo );
 298     p_vdec->i_pts = p_pes->i_pts;
 299
 300     while( ( !p_pes->i_nb_data )||( !p_pes->i_pes_size ) )
 301     {
 302         __PES_NEXT( p_vdec->p_fifo );
 303         p_pes = __PES_GET( p_vdec->p_fifo );
 304     }
 305     p_vdec->i_framesize = p_pes->i_pes_size;
 306     if( p_pes->i_nb_data == 1 )
 307     {
 308         p_vdec->p_framedata = p_pes->p_first->p_payload_start;
 309         return;
 310     }
 311     /* get a buffer and gather all data packet */
 312     if( p_vdec->i_buffer_size < p_pes->i_pes_size )
 313     {
 314         if( p_vdec->p_buffer )
 315         {
 316             p_vdec->p_buffer = realloc( p_vdec->p_buffer,
 317                                         p_pes->i_pes_size );
 318         }
 319         else
 320         {
 321             p_vdec->p_buffer = malloc( p_pes->i_pes_size );
 322         }
 323         p_vdec->i_buffer_size = p_pes->i_pes_size;
 324     }
 325
 326     p_buffer = p_vdec->p_framedata = p_vdec->p_buffer;
 327     p_data = p_pes->p_first;
 328     do
 329     {
 330         p_vdec->p_fifo->p_vlc->pf_memcpy( p_buffer, p_data->p_payload_start,
 331                      p_data->p_payload_end - p_data->p_payload_start );
 332         p_buffer += p_data->p_payload_end - p_data->p_payload_start;
 333         p_data = p_data->p_next;
 334     } while( p_data );
 335 }
 336
 337 static inline void __NextFrame( videodec_thread_t *p_vdec )
 338 {
 339     __PES_NEXT( p_vdec->p_fifo );
 340 }
 341
 342
 343 /* Check if we have a Vout with good parameters */
 344 static int ffmpeg_CheckVout( vout_thread_t *p_vout,
 345                              int i_width,
 346                              int i_height,
 347                              int i_aspect,
 348                              int i_chroma )
 349 {
 350     if( !p_vout )
 351     {
 352         return( 0 );
 353     }
 354     if( !i_chroma )
 355     {
 356         /* we will try to make conversion */
 357         i_chroma = VLC_FOURCC('I','4','2','0');
 358     }
 359
 360     if( ( p_vout->render.i_width != i_width )||
 361         ( p_vout->render.i_height != i_height )||
 362         ( p_vout->render.i_chroma != i_chroma )||
 363         ( p_vout->render.i_aspect !=
 364                 ffmpeg_FfAspect( i_width, i_height, i_aspect ) ) )
 365     {
 366         return( 0 );
 367     }
 368     else
 369     {
 370         return( 1 );
 371     }
 372 }
 373
 374 /* Return a Vout */
 375
 376 static vout_thread_t *ffmpeg_CreateVout( videodec_thread_t *p_vdec,
 377                                          int i_width,
 378                                          int i_height,
 379                                          int i_aspect,
 380                                          int i_chroma )
 381 {
 382     vout_thread_t *p_vout;
 383
 384     if( (!i_width)||(!i_height) )
 385     {
 386         return( NULL ); /* Can't create a new vout without display size */
 387     }
 388
 389     if( !i_chroma )
 390     {
 391         /* we make conversion if possible*/
 392         i_chroma = VLC_FOURCC('I','4','2','0');
 393         msg_Warn( p_vdec->p_fifo, "Internal chroma conversion (FIXME)");
 394         /* It's mainly for I410 -> I420 conversion that I've made,
 395            it's buggy and very slow */
 396     }
 397
 398     i_aspect = ffmpeg_FfAspect( i_width, i_height, i_aspect );
 399
 400     /* Spawn a video output if there is none. First we look for our children,
 401      * then we look for any other vout that might be available. */
 402     p_vout = vlc_object_find( p_vdec->p_fifo, VLC_OBJECT_VOUT,
 403                                               FIND_CHILD );
 404     if( !p_vout )
 405     {
 406         p_vout = vlc_object_find( p_vdec->p_fifo, VLC_OBJECT_VOUT,
 407                                                   FIND_ANYWHERE );
 408     }
 409
 410     if( p_vout )
 411     {
 412         if( !ffmpeg_CheckVout( p_vout,
 413                                i_width, i_height, i_aspect,i_chroma ) )
 414         {
 415             /* We are not interested in this format, close this vout */
 416             vlc_object_detach( p_vout );
 417             vlc_object_release( p_vout );
 418             vout_DestroyThread( p_vout );
 419             p_vout = NULL;
 420         }
 421         else
 422         {
 423             /* This video output is cool! Hijack it. */
 424             vlc_object_detach( p_vout );
 425             vlc_object_attach( p_vout, p_vdec->p_fifo );
 426             vlc_object_release( p_vout );
 427         }
 428     }
 429
 430     if( p_vout == NULL )
 431     {
 432         msg_Dbg( p_vdec->p_fifo, "no vout present, spawning one" );
 433
 434         p_vout = vout_CreateThread( p_vdec->p_fifo,
 435                                     i_width, i_height,
 436                                     i_chroma, i_aspect );
 437     }
 438
 439     return( p_vout );
 440 }
 441
 442 /* FIXME FIXME FIXME this is a big shit
 443    does someone want to rewrite this function ?
 444    or said to me how write a better thing
 445    FIXME FIXME FIXME
 446 */
 447 static void ffmpeg_ConvertPictureI410toI420( picture_t *p_pic,
 448                                              AVPicture *p_avpicture,
 449                                              videodec_thread_t   *p_vdec )
 450 {
 451     u8 *p_src, *p_dst;
 452     u8 *p_plane[3];
 453     int i_plane;
 454
 455     int i_stride, i_lines;
 456     int i_height, i_width;
 457     int i_y, i_x;
 458
 459     i_height = p_vdec->p_context->height;
 460     i_width  = p_vdec->p_context->width;
 461
 462     p_dst = p_pic->p[0].p_pixels;
 463     p_src  = p_avpicture->data[0];
 464
 465     /* copy first plane */
 466     for( i_y = 0; i_y < i_height; i_y++ )
 467     {
 468         p_vdec->p_fifo->p_vlc->pf_memcpy( p_dst, p_src, i_width);
 469         p_dst += p_pic->p[0].i_pitch;
 470         p_src += p_avpicture->linesize[0];
 471     }
 472
 473     /* process each plane in a temporary buffer */
 474     for( i_plane = 1; i_plane < 3; i_plane++ )
 475     {
 476         i_stride = p_avpicture->linesize[i_plane];
 477         i_lines = i_height / 4;
 478
 479         p_dst = p_plane[i_plane] = malloc( i_lines * i_stride * 2 * 2 );
 480         p_src  = p_avpicture->data[i_plane];
 481
 482         /* for each source line */
 483         for( i_y = 0; i_y < i_lines; i_y++ )
 484         {
 485             for( i_x = 0; i_x < i_stride - 1; i_x++ )
 486             {
 487                 p_dst[2 * i_x    ] = p_src[i_x];
 488                 p_dst[2 * i_x + 1] = ( p_src[i_x] + p_src[i_x + 1]) / 2;
 489
 490             }
 491             p_dst[2 * i_stride - 2] = p_src[i_x];
 492             p_dst[2 * i_stride - 1] = p_src[i_x];
 493
 494             p_dst += 4 * i_stride; /* process the next even lines */
 495             p_src += i_stride;
 496         }
 497
 498
 499     }
 500
 501     for( i_plane = 1; i_plane < 3; i_plane++ )
 502     {
 503         i_stride = p_avpicture->linesize[i_plane];
 504         i_lines = i_height / 4;
 505
 506         p_dst = p_plane[i_plane] + 2*i_stride;
 507         p_src  = p_plane[i_plane];
 508
 509         for( i_y = 0; i_y < i_lines - 1; i_y++ )
 510         {
 511             for( i_x = 0; i_x <  2 * i_stride ; i_x++ )
 512             {
 513                 p_dst[i_x] = ( p_src[i_x] + p_src[i_x + 4*i_stride])/2;
 514             }
 515
 516             p_dst += 4 * i_stride; /* process the next odd lines */
 517             p_src += 4 * i_stride;
 518         }
 519         /* last line */
 520         p_vdec->p_fifo->p_vlc->pf_memcpy( p_dst, p_src, 2*i_stride );
 521     }
 522     /* copy to p_pic, by block
 523        if I do pixel per pixel it segfault. It's why I use
 524        temporaries buffers */
 525     for( i_plane = 1; i_plane < 3; i_plane++ )
 526     {
 527
 528         int i_size;
 529         p_src  = p_plane[i_plane];
 530         p_dst = p_pic->p[i_plane].p_pixels;
 531
 532         i_size = __MIN( 2*i_stride, p_pic->p[i_plane].i_pitch);
 533         for( i_y = 0; i_y < __MIN(p_pic->p[i_plane].i_lines, 2 * i_lines); i_y++ )
 534         {
 535             p_vdec->p_fifo->p_vlc->pf_memcpy( p_dst, p_src, i_size );
 536             p_src += 2 * i_stride;
 537             p_dst += p_pic->p[i_plane].i_pitch;
 538         }
 539         free( p_plane[i_plane] );
 540     }
 541
 542 }
 543
 544 static void ffmpeg_GetPicture( picture_t *p_pic,
 545                                AVPicture *p_avpicture,
 546                                videodec_thread_t   *p_vdec )
 547 {
 548     int i_plane;
 549     int i_size;
 550     int i_line;
 551
 552     u8  *p_dst;
 553     u8  *p_src;
 554     int i_src_stride;
 555     int i_dst_stride;
 556
 557     if( ffmpeg_PixFmtToChroma( p_vdec->p_context->pix_fmt ) )
 558     {
 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         if( ( p_vdec->i_pp_mode )&&
 575             ( ( p_vdec->p_vout->render.i_chroma ==
 576                     VLC_FOURCC( 'I','4','2','0' ) )||
 577               ( p_vdec->p_vout->render.i_chroma ==
 578                     VLC_FOURCC( 'Y','V','1','2' ) ) ) )
 579         {
 580             /* Make postproc */
 581 #if LIBAVCODEC_BUILD > 4313
 582             p_vdec->p_pp->pf_postprocess( p_pic,
 583                                           p_vdec->p_context->quant_store,
 584                                           p_vdec->p_context->qstride,
 585                                           p_vdec->i_pp_mode );
 586 #endif
 587         }
 588     }
 589     else
 590     {
 591         /* we need to convert to I420 */
 592         switch( p_vdec->p_context->pix_fmt )
 593         {
 594 #if LIBAVCODEC_BUILD >= 4615
 595             case( PIX_FMT_YUV410P ):
 596                 ffmpeg_ConvertPictureI410toI420( p_pic, p_avpicture, p_vdec );
 597                 break;
 598 #endif
 599             default:
 600                 p_vdec->p_fifo->b_error = 1;
 601                 break;
 602         }
 603
 604     }
 605
 606 }
 607
 608
 609
 610 /*****************************************************************************
 611  *
 612  * Functions that initialize, decode and end the decoding process
 613  *
 614  *****************************************************************************/
 615
 616 /*****************************************************************************
 617  * InitThread: initialize vdec output thread
 618  *****************************************************************************
 619  * This function is called from decoder_Run and performs the second step
 620  * of the initialization. It returns 0 on success. Note that the thread's
 621  * flag are not modified inside this function.
 622  *
 623  * ffmpeg codec will be open, some memory allocated. But Vout is not yet
 624  *   open (done after the first decoded frame)
 625  *****************************************************************************/
 626 static int InitThread( videodec_thread_t *p_vdec )
 627 {
 628     int i_ffmpeg_codec;
 629     int i_tmp;
 630
 631     if( p_vdec->p_fifo->p_demux_data )
 632     {
 633         ffmpeg_ParseBitMapInfoHeader( &p_vdec->format,
 634                                       (u8*)p_vdec->p_fifo->p_demux_data );
 635     }
 636     else
 637     {
 638         msg_Warn( p_vdec->p_fifo, "display informations missing" );
 639     }
 640
 641     /* **** init ffmpeg library (libavcodec) ***** */
 642     if( !b_ffmpeginit )
 643     {
 644         avcodec_init();
 645         avcodec_register_all();
 646         b_ffmpeginit = 1;
 647         msg_Dbg( p_vdec->p_fifo, "library ffmpeg initialized" );
 648     }
 649     else
 650     {
 651         msg_Dbg( p_vdec->p_fifo, "library ffmpeg already initialized" );
 652     }
 653
 654     /* ***** Search for codec ***** */
 655     ffmpeg_GetFfmpegCodec( p_vdec->p_fifo->i_fourcc,
 656                            &i_ffmpeg_codec,
 657                            &p_vdec->psz_namecodec );
 658     p_vdec->p_codec =
 659         avcodec_find_decoder( i_ffmpeg_codec );
 660
 661     if( !p_vdec->p_codec )
 662     {
 663         msg_Err( p_vdec->p_fifo, "codec not found (%s)",
 664                                  p_vdec->psz_namecodec );
 665         return( -1 );
 666     }
 667
 668     /* ***** Fill p_context with init values ***** */
 669     p_vdec->p_context = &p_vdec->context;
 670     memset( p_vdec->p_context, 0, sizeof( AVCodecContext ) );
 671
 672     p_vdec->p_context->width  = p_vdec->format.i_width;
 673     p_vdec->p_context->height = p_vdec->format.i_height;
 674
 675     /*  ***** Get configuration of ffmpeg plugin ***** */
 676 #if LIBAVCODEC_BUILD >= 4611
 677     i_tmp = config_GetInt( p_vdec->p_fifo, "ffmpeg-workaround-bugs" );
 678     p_vdec->p_context->workaround_bugs  = __MAX( __MIN( i_tmp, 99 ), 0 );
 679
 680     i_tmp = config_GetInt( p_vdec->p_fifo, "ffmpeg-error-resilience" );
 681     p_vdec->p_context->error_resilience = __MAX( __MIN( i_tmp, 99 ), -1 );
 682 #endif
 683 #if LIBAVCODEC_BUILD >= 4614
 684     if( config_GetInt( p_vdec->p_fifo, "grayscale" ) )
 685     {
 686         p_vdec->p_context->flags|= CODEC_FLAG_GRAY;
 687     }
 688 #endif
 689     p_vdec->b_hurry_up = config_GetInt(p_vdec->p_fifo, "ffmpeg-hurry-up");
 690
 691
 692     /* ***** Open the codec ***** */
 693     if (avcodec_open(p_vdec->p_context, p_vdec->p_codec) < 0)
 694     {
 695         msg_Err( p_vdec->p_fifo, "cannot open codec (%s)",
 696                                  p_vdec->psz_namecodec );
 697         return( -1 );
 698     }
 699     else
 700     {
 701         msg_Dbg( p_vdec->p_fifo, "ffmpeg codec (%s) started",
 702                                  p_vdec->psz_namecodec );
 703     }
 704
 705     /* ***** init this codec with special data(up to now MPEG4 only) ***** */
 706     if( p_vdec->format.i_data )
 707     {
 708         AVPicture avpicture;
 709         int b_gotpicture;
 710
 711         switch( i_ffmpeg_codec )
 712         {
 713             case( CODEC_ID_MPEG4 ):
 714                 avcodec_decode_video( p_vdec->p_context, &avpicture,
 715                                       &b_gotpicture,
 716                                       p_vdec->format.p_data,
 717                                       p_vdec->format.i_data );
 718                 break;
 719             default:
 720                 break;
 721         }
 722     }
 723
 724     /* ***** Load post processing ***** */
 725
 726     /* get overridding settings */
 727     p_vdec->i_pp_mode = 0;
 728     if( config_GetInt( p_vdec->p_fifo, "ffmpeg-db-yv" ) )
 729         p_vdec->i_pp_mode |= PP_DEBLOCK_Y_V;
 730     if( config_GetInt( p_vdec->p_fifo, "ffmpeg-db-yh" ) )
 731         p_vdec->i_pp_mode |= PP_DEBLOCK_Y_H;
 732     if( config_GetInt( p_vdec->p_fifo, "ffmpeg-db-cv" ) )
 733         p_vdec->i_pp_mode |= PP_DEBLOCK_C_V;
 734     if( config_GetInt( p_vdec->p_fifo, "ffmpeg-db-ch" ) )
 735         p_vdec->i_pp_mode |= PP_DEBLOCK_C_H;
 736     if( config_GetInt( p_vdec->p_fifo, "ffmpeg-dr-y" ) )
 737         p_vdec->i_pp_mode |= PP_DERING_Y;
 738     if( config_GetInt( p_vdec->p_fifo, "ffmpeg-dr-c" ) )
 739         p_vdec->i_pp_mode |= PP_DERING_C;
 740
 741     if( ( config_GetInt( p_vdec->p_fifo, "ffmpeg-pp-q" ) > 0 )||
 742         ( config_GetInt( p_vdec->p_fifo, "ffmpeg-pp-auto" )  )||
 743         ( p_vdec->i_pp_mode != 0 ) )
 744     {
 745         /* check if the codec support postproc. */
 746         switch( i_ffmpeg_codec )
 747         {
 748 #if LIBAVCODEC_BUILD > 4608
 749             case( CODEC_ID_MSMPEG4V1 ):
 750             case( CODEC_ID_MSMPEG4V2 ):
 751             case( CODEC_ID_MSMPEG4V3 ):
 752 #else
 753             case( CODEC_ID_MSMPEG4 ):
 754 #endif
 755             case( CODEC_ID_MPEG4 ):
 756             case( CODEC_ID_H263 ):
 757 //            case( CODEC_ID_H263P ): I don't use it up to now
 758             case( CODEC_ID_H263I ):
 759                 /* Ok we can make postprocessing :)) */
 760                /* first try to get a postprocess module */
 761 #if LIBAVCODEC_BUILD > 4613
 762                 p_vdec->p_pp = vlc_object_create( p_vdec->p_fifo,
 763                                                   sizeof( postprocessing_t ) );
 764                 p_vdec->p_pp->psz_object_name = "postprocessing";
 765                 p_vdec->p_pp->p_module =
 766                    module_Need( p_vdec->p_pp, "postprocessing", "$ffmpeg-pp" );
 767
 768                 if( !p_vdec->p_pp->p_module )
 769                 {
 770                     msg_Warn( p_vdec->p_fifo,
 771                               "no suitable postprocessing module" );
 772                     vlc_object_destroy( p_vdec->p_pp );
 773                     p_vdec->p_pp = NULL;
 774                     p_vdec->i_pp_mode = 0;
 775                 }
 776                 else
 777                 {
 778                     /* get mode upon quality */
 779                     p_vdec->i_pp_mode |=
 780                         p_vdec->p_pp->pf_getmode(
 781                               config_GetInt( p_vdec->p_fifo, "ffmpeg-pp-q" ),
 782                               config_GetInt( p_vdec->p_fifo, "ffmpeg-pp-auto" )
 783                                                 );
 784
 785                     /* allocate table for postprocess */
 786                     p_vdec->p_context->quant_store =
 787                         malloc( sizeof( int ) * ( MBR + 1 ) * ( MBC + 1 ) );
 788                     p_vdec->p_context->qstride = MBC + 1;
 789                 }
 790 #else
 791                 p_vdec->i_pp_mode = 0;
 792                 msg_Warn( p_vdec->p_fifo,
 793                           "post-processing not supported, upgrade ffmpeg" );
 794 #endif
 795                 break;
 796             default:
 797                 p_vdec->i_pp_mode = 0;
 798                 msg_Warn( p_vdec->p_fifo,
 799                           "Post processing unsupported for this codec" );
 800                 break;
 801         }
 802
 803     }
 804 //    memset( &p_vdec->statistic, 0, sizeof( statistic_t ) );
 805
 806     return( 0 );
 807 }
 808
 809 /*****************************************************************************
 810  * DecodeThread: Called for decode one frame
 811  *****************************************************************************/
 812 static void  DecodeThread( videodec_thread_t *p_vdec )
 813 {
 814     int     i_status;
 815     int     b_drawpicture;
 816     int     b_gotpicture;
 817     AVPicture avpicture;  /* ffmpeg picture */
 818     picture_t *p_pic; /* videolan picture */
 819     /* we have to get a frame stored in a pes
 820        give it to ffmpeg decoder
 821        and send the image to the output */
 822
 823     /* TODO implement it in a better way */
 824     /* A good idea could be to decode all I pictures and see for the other */
 825     if( ( p_vdec->b_hurry_up )&&
 826         ( p_vdec->i_frame_late > 4 ) )
 827     {
 828 #if LIBAVCODEC_BUILD > 4603
 829         b_drawpicture = 0;
 830         if( p_vdec->i_frame_late < 8 )
 831         {
 832             p_vdec->p_context->hurry_up = 2;
 833         }
 834         else
 835         {
 836             /* too much late picture, won't decode
 837                but break picture until a new I, and for mpeg4 ...*/
 838             p_vdec->i_frame_late--; /* needed else it will never be decrease */
 839             __PES_NEXT( p_vdec->p_fifo );
 840             return;
 841         }
 842 #else
 843         if( p_vdec->i_frame_late < 8 )
 844         {
 845             b_drawpicture = 0; /* not really good but .. UPGRADE FFMPEG !! */
 846         }
 847         else
 848         {
 849             /* too much late picture, won't decode
 850                but break picture until a new I, and for mpeg4 ...*/
 851             p_vdec->i_frame_late--; /* needed else it will never be decrease */
 852             __PES_NEXT( p_vdec->p_fifo );
 853             return;
 854         }
 855 #endif
 856     }
 857     else
 858     {
 859         b_drawpicture = 1;
 860 #if LIBAVCODEC_BUILD > 4603
 861         p_vdec->p_context->hurry_up = 0;
 862 #endif
 863     }
 864
 865     __GetFrame( p_vdec );
 866
 867     i_status = avcodec_decode_video( p_vdec->p_context,
 868                                      &avpicture,
 869                                      &b_gotpicture,
 870                                      p_vdec->p_framedata,
 871                                      p_vdec->i_framesize);
 872
 873     __NextFrame( p_vdec );
 874
 875     if( i_status < 0 )
 876     {
 877         msg_Warn( p_vdec->p_fifo, "cannot decode one frame (%d bytes)",
 878                                   p_vdec->i_framesize );
 879         p_vdec->i_frame_error++;
 880         return;
 881     }
 882     /* Update frame late count*/
 883     /* I don't make statistic on decoding time */
 884     if( p_vdec->i_pts <= mdate())
 885     {
 886         p_vdec->i_frame_late++;
 887     }
 888     else
 889     {
 890         p_vdec->i_frame_late = 0;
 891     }
 892
 893     if( !b_gotpicture || avpicture.linesize[0] == 0 || !b_drawpicture)
 894     {
 895         return;
 896     }
 897
 898     /* Check our vout */
 899     if( !ffmpeg_CheckVout( p_vdec->p_vout,
 900                            p_vdec->p_context->width,
 901                            p_vdec->p_context->height,
 902                            p_vdec->p_context->aspect_ratio_info,
 903                            ffmpeg_PixFmtToChroma(p_vdec->p_context->pix_fmt)) )
 904     {
 905         p_vdec->p_vout =
 906           ffmpeg_CreateVout( p_vdec,
 907                              p_vdec->p_context->width,
 908                              p_vdec->p_context->height,
 909                              p_vdec->p_context->aspect_ratio_info,
 910                              ffmpeg_PixFmtToChroma(p_vdec->p_context->pix_fmt));
 911         if( !p_vdec->p_vout )
 912         {
 913             msg_Err( p_vdec->p_fifo, "cannot create vout" );
 914             p_vdec->p_fifo->b_error = 1; /* abort */
 915             return;
 916         }
 917     }
 918
 919     /* Get a new picture */
 920     while( !(p_pic = vout_CreatePicture( p_vdec->p_vout, 0, 0, 0 ) ) )
 921     {
 922         if( p_vdec->p_fifo->b_die || p_vdec->p_fifo->b_error )
 923         {
 924             return;
 925         }
 926         msleep( VOUT_OUTMEM_SLEEP );
 927     }
 928     /* fill p_picture_t from avpicture, do I410->I420 if needed
 929        and do post-processing if requested */
 930     ffmpeg_GetPicture( p_pic, &avpicture, p_vdec );
 931
 932     /* FIXME correct avi and use i_dts */
 933
 934     /* Send decoded frame to vout */
 935     vout_DatePicture( p_vdec->p_vout, p_pic, p_vdec->i_pts);
 936     vout_DisplayPicture( p_vdec->p_vout, p_pic );
 937
 938     return;
 939 }
 940
 941
 942 /*****************************************************************************
 943  * EndThread: thread destruction
 944  *****************************************************************************
 945  * This function is called when the thread ends after a sucessful
 946  * initialization.
 947  *****************************************************************************/
 948 static void EndThread( videodec_thread_t *p_vdec )
 949 {
 950
 951     if( !p_vdec )
 952     {
 953         return;
 954     }
 955     if( p_vdec->p_pp )
 956     {
 957         /* release postprocessing module */
 958         module_Unneed( p_vdec->p_pp, p_vdec->p_pp->p_module );
 959         vlc_object_destroy( p_vdec->p_pp );
 960         p_vdec->p_pp = NULL;
 961     }
 962
 963     if( p_vdec->p_context != NULL)
 964     {
 965         FREE( p_vdec->p_context->quant_store );
 966         avcodec_close( p_vdec->p_context );
 967         msg_Dbg( p_vdec->p_fifo, "ffmpeg codec (%s) stopped",
 968                                  p_vdec->psz_namecodec );
 969     }
 970
 971     if( p_vdec->p_vout != NULL )
 972     {
 973         /* We are about to die. Reattach video output to p_vlc. */
 974         vlc_object_detach( p_vdec->p_vout );
 975         vlc_object_attach( p_vdec->p_vout, p_vdec->p_fifo->p_vlc );
 976     }
 977
 978     FREE( p_vdec->format.p_data );
 979     FREE( p_vdec->p_buffer );
 980
 981     free( p_vdec );
 982 }
 983