git.sesse.net Git - vlc/blob - modules/stream_out/transcode/video.c

   1 /*****************************************************************************
   2  * video.c: transcoding stream output module (video)
   3  *****************************************************************************
   4  * Copyright (C) 2003-2009 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *          Jean-Paul Saman <jpsaman #_at_# m2x dot nl>
  10  *          Antoine Cellerier <dionoea at videolan dot org>
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU Lesser General Public License as published by
  14  * the Free Software Foundation; either version 2.1 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  20  * GNU Lesser General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Lesser General Public License
  23  * along with this program; if not, write to the Free Software Foundation,
  24  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30
  31 #include "transcode.h"
  32
  33 #include <vlc_meta.h>
  34 #include <vlc_spu.h>
  35 #include <vlc_modules.h>
  36
  37 #define ENC_FRAMERATE (25 * 1000)
  38 #define ENC_FRAMERATE_BASE 1000
  39
  40 struct decoder_owner_sys_t
  41 {
  42     sout_stream_sys_t *p_sys;
  43 };
  44
  45 static void video_del_buffer_decoder( decoder_t *p_decoder, picture_t *p_pic )
  46 {
  47     VLC_UNUSED(p_decoder);
  48     picture_Release( p_pic );
  49 }
  50
  51 static void video_link_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
  52 {
  53     VLC_UNUSED(p_dec);
  54     picture_Hold( p_pic );
  55 }
  56
  57 static void video_unlink_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
  58 {
  59     VLC_UNUSED(p_dec);
  60     picture_Release( p_pic );
  61 }
  62
  63 static picture_t *video_new_buffer_decoder( decoder_t *p_dec )
  64 {
  65     p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
  66     return picture_NewFromFormat( &p_dec->fmt_out.video );
  67 }
  68
  69 static picture_t *video_new_buffer_encoder( encoder_t *p_enc )
  70 {
  71     p_enc->fmt_in.video.i_chroma = p_enc->fmt_in.i_codec;
  72     return picture_NewFromFormat( &p_enc->fmt_in.video );
  73 }
  74
  75 static picture_t *transcode_video_filter_buffer_new( filter_t *p_filter )
  76 {
  77     p_filter->fmt_out.video.i_chroma = p_filter->fmt_out.i_codec;
  78     return picture_NewFromFormat( &p_filter->fmt_out.video );
  79 }
  80 static void transcode_video_filter_buffer_del( filter_t *p_filter, picture_t *p_pic )
  81 {
  82     VLC_UNUSED(p_filter);
  83     picture_Release( p_pic );
  84 }
  85
  86 static int transcode_video_filter_allocation_init( filter_t *p_filter,
  87                                                    void *p_data )
  88 {
  89     VLC_UNUSED(p_data);
  90     p_filter->pf_video_buffer_new = transcode_video_filter_buffer_new;
  91     p_filter->pf_video_buffer_del = transcode_video_filter_buffer_del;
  92     return VLC_SUCCESS;
  93 }
  94
  95 static void transcode_video_filter_allocation_clear( filter_t *p_filter )
  96 {
  97     VLC_UNUSED(p_filter);
  98 }
  99
 100 static void* EncoderThread( void *obj )
 101 {
 102     sout_stream_sys_t *p_sys = (sout_stream_sys_t*)obj;
 103     sout_stream_id_t *id = p_sys->id_video;
 104     picture_t *p_pic = NULL;
 105     int canc = vlc_savecancel ();
 106     block_t *p_block = NULL;
 107
 108     for( ;; )
 109     {
 110
 111         vlc_mutex_lock( &p_sys->lock_out );
 112         while( !p_sys->b_abort &&
 113                (p_pic = picture_fifo_Pop( p_sys->pp_pics )) == NULL )
 114             vlc_cond_wait( &p_sys->cond, &p_sys->lock_out );
 115
 116         if( p_sys->b_abort && !p_pic )
 117         {
 118             vlc_mutex_unlock( &p_sys->lock_out );
 119             break;
 120         }
 121         vlc_mutex_unlock( &p_sys->lock_out );
 122
 123         if( p_pic )
 124         {
 125             p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
 126
 127             vlc_mutex_lock( &p_sys->lock_out );
 128             block_ChainAppend( &p_sys->p_buffers, p_block );
 129
 130             vlc_mutex_unlock( &p_sys->lock_out );
 131             picture_Release( p_pic );
 132         }
 133
 134         vlc_mutex_lock( &p_sys->lock_out );
 135         if( p_sys->b_abort )
 136         {
 137             vlc_mutex_unlock( &p_sys->lock_out );
 138             break;
 139         }
 140             vlc_mutex_unlock( &p_sys->lock_out );
 141     }
 142
 143     /*Encode what we have in the buffer on closing*/
 144     vlc_mutex_lock( &p_sys->lock_out );
 145     while( (p_pic = picture_fifo_Pop( p_sys->pp_pics )) != NULL )
 146     {
 147         p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
 148
 149         block_ChainAppend( &p_sys->p_buffers, p_block );
 150
 151         picture_Release( p_pic );
 152     }
 153
 154     /*Now flush encoder*/
 155     do {
 156        p_block = id->p_encoder->pf_encode_video(id->p_encoder, NULL );
 157        block_ChainAppend( &p_sys->p_buffers, p_block );
 158     } while( p_block );
 159
 160     vlc_mutex_unlock( &p_sys->lock_out );
 161
 162
 163     vlc_restorecancel (canc);
 164     return NULL;
 165 }
 166
 167 int transcode_video_new( sout_stream_t *p_stream, sout_stream_id_t *id )
 168 {
 169     sout_stream_sys_t *p_sys = p_stream->p_sys;
 170
 171     /* Open decoder
 172      * Initialization of decoder structures
 173      */
 174     id->p_decoder->fmt_out = id->p_decoder->fmt_in;
 175     id->p_decoder->fmt_out.i_extra = 0;
 176     id->p_decoder->fmt_out.p_extra = 0;
 177     id->p_decoder->pf_decode_video = NULL;
 178     id->p_decoder->pf_get_cc = NULL;
 179     id->p_decoder->pf_get_cc = 0;
 180     id->p_decoder->pf_vout_buffer_new = video_new_buffer_decoder;
 181     id->p_decoder->pf_vout_buffer_del = video_del_buffer_decoder;
 182     id->p_decoder->pf_picture_link    = video_link_picture_decoder;
 183     id->p_decoder->pf_picture_unlink  = video_unlink_picture_decoder;
 184     id->p_decoder->p_owner = malloc( sizeof(decoder_owner_sys_t) );
 185     if( !id->p_decoder->p_owner )
 186         return VLC_EGENERIC;
 187
 188     id->p_decoder->p_owner->p_sys = p_sys;
 189     /* id->p_decoder->p_cfg = p_sys->p_video_cfg; */
 190
 191     id->p_decoder->p_module =
 192         module_need( id->p_decoder, "decoder", "$codec", false );
 193
 194     if( !id->p_decoder->p_module )
 195     {
 196         msg_Err( p_stream, "cannot find video decoder" );
 197         free( id->p_decoder->p_owner );
 198         return VLC_EGENERIC;
 199     }
 200
 201     /*
 202      * Open encoder.
 203      * Because some info about the decoded input will only be available
 204      * once the first frame is decoded, we actually only test the availability
 205      * of the encoder here.
 206      */
 207
 208     /* Initialization of encoder format structures */
 209     es_format_Init( &id->p_encoder->fmt_in, id->p_decoder->fmt_in.i_cat,
 210                     id->p_decoder->fmt_out.i_codec );
 211     id->p_encoder->fmt_in.video.i_chroma = id->p_decoder->fmt_out.i_codec;
 212
 213     /* The dimensions will be set properly later on.
 214      * Just put sensible values so we can test an encoder is available. */
 215     id->p_encoder->fmt_in.video.i_width =
 216         id->p_encoder->fmt_out.video.i_width
 217           ? id->p_encoder->fmt_out.video.i_width
 218           : id->p_decoder->fmt_in.video.i_width
 219             ? id->p_decoder->fmt_in.video.i_width : 16;
 220     id->p_encoder->fmt_in.video.i_height =
 221         id->p_encoder->fmt_out.video.i_height
 222           ? id->p_encoder->fmt_out.video.i_height
 223           : id->p_decoder->fmt_in.video.i_height
 224             ? id->p_decoder->fmt_in.video.i_height : 16;
 225     id->p_encoder->fmt_in.video.i_visible_width =
 226         id->p_encoder->fmt_out.video.i_visible_width
 227           ? id->p_encoder->fmt_out.video.i_visible_width
 228           : id->p_decoder->fmt_in.video.i_visible_width
 229             ? id->p_decoder->fmt_in.video.i_visible_width : id->p_encoder->fmt_in.video.i_width;
 230     id->p_encoder->fmt_in.video.i_visible_height =
 231         id->p_encoder->fmt_out.video.i_visible_height
 232           ? id->p_encoder->fmt_out.video.i_visible_height
 233           : id->p_decoder->fmt_in.video.i_visible_height
 234             ? id->p_decoder->fmt_in.video.i_visible_height : id->p_encoder->fmt_in.video.i_height;
 235     id->p_encoder->fmt_in.video.i_frame_rate = id->p_decoder->fmt_out.video.i_frame_rate;
 236     id->p_encoder->fmt_in.video.i_frame_rate_base = id->p_decoder->fmt_out.video.i_frame_rate_base;
 237
 238     id->p_encoder->i_threads = p_sys->i_threads;
 239     id->p_encoder->p_cfg = p_sys->p_video_cfg;
 240
 241     id->p_encoder->p_module =
 242         module_need( id->p_encoder, "encoder", p_sys->psz_venc, true );
 243     if( !id->p_encoder->p_module )
 244     {
 245         msg_Err( p_stream, "cannot find video encoder (module:%s fourcc:%4.4s). Take a look few lines earlier to see possible reason.",
 246                  p_sys->psz_venc ? p_sys->psz_venc : "any",
 247                  (char *)&p_sys->i_vcodec );
 248         module_unneed( id->p_decoder, id->p_decoder->p_module );
 249         id->p_decoder->p_module = 0;
 250         free( id->p_decoder->p_owner );
 251         return VLC_EGENERIC;
 252     }
 253
 254     /* Close the encoder.
 255      * We'll open it only when we have the first frame. */
 256     module_unneed( id->p_encoder, id->p_encoder->p_module );
 257     if( id->p_encoder->fmt_out.p_extra )
 258     {
 259         free( id->p_encoder->fmt_out.p_extra );
 260         id->p_encoder->fmt_out.p_extra = NULL;
 261         id->p_encoder->fmt_out.i_extra = 0;
 262     }
 263     id->p_encoder->p_module = NULL;
 264
 265     if( p_sys->i_threads >= 1 )
 266     {
 267         int i_priority = p_sys->b_high_priority ? VLC_THREAD_PRIORITY_OUTPUT :
 268                            VLC_THREAD_PRIORITY_VIDEO;
 269         p_sys->id_video = id;
 270         vlc_mutex_init( &p_sys->lock_out );
 271         vlc_cond_init( &p_sys->cond );
 272         p_sys->pp_pics = picture_fifo_New();
 273         if( p_sys->pp_pics == NULL )
 274         {
 275             msg_Err( p_stream, "cannot create picture fifo" );
 276             vlc_mutex_destroy( &p_sys->lock_out );
 277             vlc_cond_destroy( &p_sys->cond );
 278             module_unneed( id->p_decoder, id->p_decoder->p_module );
 279             id->p_decoder->p_module = NULL;
 280             free( id->p_decoder->p_owner );
 281             return VLC_ENOMEM;
 282         }
 283         p_sys->p_buffers = NULL;
 284         p_sys->b_abort = false;
 285         if( vlc_clone( &p_sys->thread, EncoderThread, p_sys, i_priority ) )
 286         {
 287             msg_Err( p_stream, "cannot spawn encoder thread" );
 288             vlc_mutex_destroy( &p_sys->lock_out );
 289             vlc_cond_destroy( &p_sys->cond );
 290             picture_fifo_Delete( p_sys->pp_pics );
 291             module_unneed( id->p_decoder, id->p_decoder->p_module );
 292             id->p_decoder->p_module = NULL;
 293             free( id->p_decoder->p_owner );
 294             return VLC_EGENERIC;
 295         }
 296     }
 297     return VLC_SUCCESS;
 298 }
 299
 300 static void transcode_video_filter_init( sout_stream_t *p_stream,
 301                                          sout_stream_id_t *id )
 302 {
 303     es_format_t *p_fmt_out = &id->p_decoder->fmt_out;
 304     id->p_encoder->fmt_in.video.i_chroma = id->p_encoder->fmt_in.i_codec;
 305
 306     id->p_f_chain = filter_chain_New( p_stream, "video filter2",
 307                                       false,
 308                                       transcode_video_filter_allocation_init,
 309                                       transcode_video_filter_allocation_clear,
 310                                       p_stream->p_sys );
 311     filter_chain_Reset( id->p_f_chain, p_fmt_out, p_fmt_out );
 312
 313     /* Deinterlace */
 314     if( p_stream->p_sys->b_deinterlace )
 315     {
 316         filter_chain_AppendFilter( id->p_f_chain,
 317                                    p_stream->p_sys->psz_deinterlace,
 318                                    p_stream->p_sys->p_deinterlace_cfg,
 319                                    &id->p_decoder->fmt_out,
 320                                    &id->p_decoder->fmt_out );
 321
 322         p_fmt_out = filter_chain_GetFmtOut( id->p_f_chain );
 323     }
 324
 325     /* Check that we have visible_width/height*/
 326     if( !p_fmt_out->video.i_visible_height )
 327         p_fmt_out->video.i_visible_height = p_fmt_out->video.i_height;
 328     if( !p_fmt_out->video.i_visible_width )
 329         p_fmt_out->video.i_visible_width = p_fmt_out->video.i_width;
 330
 331     if( p_stream->p_sys->psz_vf2 )
 332     {
 333         id->p_uf_chain = filter_chain_New( p_stream, "video filter2",
 334                                           true,
 335                            transcode_video_filter_allocation_init,
 336                            transcode_video_filter_allocation_clear,
 337                            p_stream->p_sys );
 338         filter_chain_Reset( id->p_uf_chain, p_fmt_out,
 339                             &id->p_encoder->fmt_in );
 340         filter_chain_AppendFromString( id->p_uf_chain, p_stream->p_sys->psz_vf2 );
 341         p_fmt_out = filter_chain_GetFmtOut( id->p_uf_chain );
 342         es_format_Copy( &id->p_encoder->fmt_in, p_fmt_out );
 343         id->p_encoder->fmt_out.video.i_width =
 344             id->p_encoder->fmt_in.video.i_width;
 345         id->p_encoder->fmt_out.video.i_height =
 346             id->p_encoder->fmt_in.video.i_height;
 347         id->p_encoder->fmt_out.video.i_sar_num =
 348             id->p_encoder->fmt_in.video.i_sar_num;
 349         id->p_encoder->fmt_out.video.i_sar_den =
 350             id->p_encoder->fmt_in.video.i_sar_den;
 351     }
 352
 353 }
 354
 355 /* Take care of the scaling and chroma conversions. */
 356 static void conversion_video_filter_append( sout_stream_id_t *id )
 357 {
 358     const es_format_t *p_fmt_out = &id->p_decoder->fmt_out;
 359     if( id->p_f_chain )
 360         p_fmt_out = filter_chain_GetFmtOut( id->p_f_chain );
 361     if( id->p_uf_chain )
 362         p_fmt_out = filter_chain_GetFmtOut( id->p_uf_chain );
 363
 364     if( ( p_fmt_out->video.i_chroma != id->p_encoder->fmt_in.video.i_chroma ) ||
 365         ( p_fmt_out->video.i_width != id->p_encoder->fmt_in.video.i_width ) ||
 366         ( p_fmt_out->video.i_height != id->p_encoder->fmt_in.video.i_height ) )
 367     {
 368         filter_chain_AppendFilter( id->p_f_chain,
 369                                    NULL, NULL,
 370                                    p_fmt_out,
 371                                    &id->p_encoder->fmt_in );
 372     }
 373 }
 374
 375 static void transcode_video_encoder_init( sout_stream_t *p_stream,
 376                                           sout_stream_id_t *id )
 377 {
 378     sout_stream_sys_t *p_sys = p_stream->p_sys;
 379
 380     const es_format_t *p_fmt_out = &id->p_decoder->fmt_out;
 381     if( id->p_f_chain ) {
 382         p_fmt_out = filter_chain_GetFmtOut( id->p_f_chain );
 383     }
 384     if( id->p_uf_chain ) {
 385         p_fmt_out = filter_chain_GetFmtOut( id->p_uf_chain );
 386     }
 387
 388     /* Calculate scaling
 389      * width/height of source */
 390     int i_src_visible_width = p_fmt_out->video.i_visible_width;
 391     int i_src_visible_height = p_fmt_out->video.i_visible_height;
 392
 393     if (i_src_visible_width == 0)
 394         i_src_visible_width = p_fmt_out->video.i_width;
 395     if (i_src_visible_height == 0)
 396         i_src_visible_height = p_fmt_out->video.i_height;
 397
 398
 399     /* with/height scaling */
 400     float f_scale_width = 1;
 401     float f_scale_height = 1;
 402
 403     /* aspect ratio */
 404     float f_aspect = (double)p_fmt_out->video.i_sar_num *
 405                      p_fmt_out->video.i_width /
 406                      p_fmt_out->video.i_sar_den /
 407                      p_fmt_out->video.i_height;
 408
 409     msg_Dbg( p_stream, "decoder aspect is %f:1", f_aspect );
 410
 411     /* Change f_aspect from source frame to source pixel */
 412     f_aspect = f_aspect * i_src_visible_height / i_src_visible_width;
 413     msg_Dbg( p_stream, "source pixel aspect is %f:1", f_aspect );
 414
 415     /* Calculate scaling factor for specified parameters */
 416     if( id->p_encoder->fmt_out.video.i_width <= 0 &&
 417         id->p_encoder->fmt_out.video.i_height <= 0 && p_sys->f_scale )
 418     {
 419         /* Global scaling. Make sure width will remain a factor of 16 */
 420         float f_real_scale;
 421         int  i_new_height;
 422         int i_new_width = i_src_visible_width * p_sys->f_scale;
 423
 424         if( i_new_width % 16 <= 7 && i_new_width >= 16 )
 425             i_new_width -= i_new_width % 16;
 426         else
 427             i_new_width += 16 - i_new_width % 16;
 428
 429         f_real_scale = (float)( i_new_width ) / (float) i_src_visible_width;
 430
 431         i_new_height = __MAX( 16, i_src_visible_height * (float)f_real_scale );
 432
 433         f_scale_width = f_real_scale;
 434         f_scale_height = (float) i_new_height / (float) i_src_visible_height;
 435     }
 436     else if( id->p_encoder->fmt_out.video.i_width > 0 &&
 437              id->p_encoder->fmt_out.video.i_height <= 0 )
 438     {
 439         /* Only width specified */
 440         f_scale_width = (float)id->p_encoder->fmt_out.video.i_width/i_src_visible_width;
 441         f_scale_height = f_scale_width;
 442     }
 443     else if( id->p_encoder->fmt_out.video.i_width <= 0 &&
 444              id->p_encoder->fmt_out.video.i_height > 0 )
 445     {
 446          /* Only height specified */
 447          f_scale_height = (float)id->p_encoder->fmt_out.video.i_height/i_src_visible_height;
 448          f_scale_width = f_scale_height;
 449      }
 450      else if( id->p_encoder->fmt_out.video.i_width > 0 &&
 451               id->p_encoder->fmt_out.video.i_height > 0 )
 452      {
 453          /* Width and height specified */
 454          f_scale_width = (float)id->p_encoder->fmt_out.video.i_width/i_src_visible_width;
 455          f_scale_height = (float)id->p_encoder->fmt_out.video.i_height/i_src_visible_height;
 456      }
 457
 458      /* check maxwidth and maxheight */
 459      if( p_sys->i_maxwidth && f_scale_width > (float)p_sys->i_maxwidth /
 460                                                      i_src_visible_width )
 461      {
 462          f_scale_width = (float)p_sys->i_maxwidth / i_src_visible_width;
 463      }
 464
 465      if( p_sys->i_maxheight && f_scale_height > (float)p_sys->i_maxheight /
 466                                                        i_src_visible_height )
 467      {
 468          f_scale_height = (float)p_sys->i_maxheight / i_src_visible_height;
 469      }
 470
 471
 472      /* Change aspect ratio from source pixel to scaled pixel */
 473      f_aspect = f_aspect * f_scale_height / f_scale_width;
 474      msg_Dbg( p_stream, "scaled pixel aspect is %f:1", f_aspect );
 475
 476      /* f_scale_width and f_scale_height are now final */
 477      /* Calculate width, height from scaling
 478       * Make sure its multiple of 2
 479       */
 480      /* width/height of output stream */
 481      int i_dst_visible_width =  2 * (int)(f_scale_width*i_src_visible_width/2+0.5);
 482      int i_dst_visible_height = 2 * (int)(f_scale_height*i_src_visible_height/2+0.5);
 483      int i_dst_width =  2 * (int)(f_scale_width*p_fmt_out->video.i_width/2+0.5);
 484      int i_dst_height = 2 * (int)(f_scale_height*p_fmt_out->video.i_height/2+0.5);
 485
 486      /* Change aspect ratio from scaled pixel to output frame */
 487      f_aspect = f_aspect * i_dst_visible_width / i_dst_visible_height;
 488
 489      /* Store calculated values */
 490      id->p_encoder->fmt_out.video.i_width = i_dst_width;
 491      id->p_encoder->fmt_out.video.i_visible_width = i_dst_visible_width;
 492      id->p_encoder->fmt_out.video.i_height = i_dst_height;
 493      id->p_encoder->fmt_out.video.i_visible_height = i_dst_visible_height;
 494
 495      id->p_encoder->fmt_in.video.i_width = i_dst_width;
 496      id->p_encoder->fmt_in.video.i_visible_width = i_dst_visible_width;
 497      id->p_encoder->fmt_in.video.i_height = i_dst_height;
 498      id->p_encoder->fmt_in.video.i_visible_height = i_dst_visible_height;
 499
 500      msg_Dbg( p_stream, "source %ix%i, destination %ix%i",
 501          i_src_visible_width, i_src_visible_height,
 502          i_dst_visible_width, i_dst_visible_height
 503      );
 504
 505     /* Handle frame rate conversion */
 506     if( !id->p_encoder->fmt_out.video.i_frame_rate ||
 507         !id->p_encoder->fmt_out.video.i_frame_rate_base )
 508     {
 509         if( p_fmt_out->video.i_frame_rate &&
 510             p_fmt_out->video.i_frame_rate_base )
 511         {
 512             id->p_encoder->fmt_out.video.i_frame_rate =
 513                 p_fmt_out->video.i_frame_rate;
 514             id->p_encoder->fmt_out.video.i_frame_rate_base =
 515                 p_fmt_out->video.i_frame_rate_base;
 516         }
 517         else
 518         {
 519             /* Pick a sensible default value */
 520             id->p_encoder->fmt_out.video.i_frame_rate = ENC_FRAMERATE;
 521             id->p_encoder->fmt_out.video.i_frame_rate_base = ENC_FRAMERATE_BASE;
 522         }
 523     }
 524
 525     id->p_encoder->fmt_in.video.i_frame_rate =
 526         id->p_encoder->fmt_out.video.i_frame_rate;
 527     id->p_encoder->fmt_in.video.i_frame_rate_base =
 528         id->p_encoder->fmt_out.video.i_frame_rate_base;
 529
 530     vlc_ureduce( &id->p_encoder->fmt_in.video.i_frame_rate,
 531         &id->p_encoder->fmt_in.video.i_frame_rate_base,
 532         id->p_encoder->fmt_in.video.i_frame_rate,
 533         id->p_encoder->fmt_in.video.i_frame_rate_base,
 534         0 );
 535      msg_Dbg( p_stream, "source fps %d/%d, destination %d/%d",
 536         id->p_decoder->fmt_out.video.i_frame_rate,
 537         id->p_decoder->fmt_out.video.i_frame_rate_base,
 538         id->p_encoder->fmt_in.video.i_frame_rate,
 539         id->p_encoder->fmt_in.video.i_frame_rate_base );
 540
 541     id->i_output_frame_interval = id->p_encoder->fmt_out.video.i_frame_rate_base * CLOCK_FREQ / id->p_encoder->fmt_out.video.i_frame_rate;
 542     id->i_input_frame_interval = id->p_decoder->fmt_out.video.i_frame_rate_base * CLOCK_FREQ / id->p_decoder->fmt_out.video.i_frame_rate;
 543     msg_Info( p_stream, "input interval %d (base %d)  output interval %d (base %d)", id->i_input_frame_interval, id->p_decoder->fmt_out.video.i_frame_rate_base,
 544                         id->i_output_frame_interval, id->p_encoder->fmt_in.video.i_frame_rate_base );
 545
 546     date_Init( &id->interpolated_pts,
 547                id->p_decoder->fmt_out.video.i_frame_rate,
 548                1 );
 549     date_Init( &id->next_output_pts,
 550                id->p_encoder->fmt_in.video.i_frame_rate,
 551                1 );
 552
 553     /* Check whether a particular aspect ratio was requested */
 554     if( id->p_encoder->fmt_out.video.i_sar_num <= 0 ||
 555         id->p_encoder->fmt_out.video.i_sar_den <= 0 )
 556     {
 557         vlc_ureduce( &id->p_encoder->fmt_out.video.i_sar_num,
 558                      &id->p_encoder->fmt_out.video.i_sar_den,
 559                      (uint64_t)p_fmt_out->video.i_sar_num * i_src_visible_width  * i_dst_visible_height,
 560                      (uint64_t)p_fmt_out->video.i_sar_den * i_src_visible_height * i_dst_visible_width,
 561                      0 );
 562     }
 563     else
 564     {
 565         vlc_ureduce( &id->p_encoder->fmt_out.video.i_sar_num,
 566                      &id->p_encoder->fmt_out.video.i_sar_den,
 567                      id->p_encoder->fmt_out.video.i_sar_num,
 568                      id->p_encoder->fmt_out.video.i_sar_den,
 569                      0 );
 570     }
 571
 572     id->p_encoder->fmt_in.video.i_sar_num =
 573         id->p_encoder->fmt_out.video.i_sar_num;
 574     id->p_encoder->fmt_in.video.i_sar_den =
 575         id->p_encoder->fmt_out.video.i_sar_den;
 576
 577     msg_Dbg( p_stream, "encoder aspect is %i:%i",
 578              id->p_encoder->fmt_out.video.i_sar_num * id->p_encoder->fmt_out.video.i_width,
 579              id->p_encoder->fmt_out.video.i_sar_den * id->p_encoder->fmt_out.video.i_height );
 580
 581 }
 582
 583 static int transcode_video_encoder_open( sout_stream_t *p_stream,
 584                                          sout_stream_id_t *id )
 585 {
 586     sout_stream_sys_t *p_sys = p_stream->p_sys;
 587
 588
 589     msg_Dbg( p_stream, "destination (after video filters) %ix%i",
 590              id->p_encoder->fmt_in.video.i_width,
 591              id->p_encoder->fmt_in.video.i_height );
 592
 593     id->p_encoder->p_module =
 594         module_need( id->p_encoder, "encoder", p_sys->psz_venc, true );
 595     if( !id->p_encoder->p_module )
 596     {
 597         msg_Err( p_stream, "cannot find video encoder (module:%s fourcc:%4.4s)",
 598                  p_sys->psz_venc ? p_sys->psz_venc : "any",
 599                  (char *)&p_sys->i_vcodec );
 600         return VLC_EGENERIC;
 601     }
 602
 603     id->p_encoder->fmt_in.video.i_chroma = id->p_encoder->fmt_in.i_codec;
 604
 605     /*  */
 606     id->p_encoder->fmt_out.i_codec =
 607         vlc_fourcc_GetCodec( VIDEO_ES, id->p_encoder->fmt_out.i_codec );
 608
 609     id->id = sout_StreamIdAdd( p_stream->p_next, &id->p_encoder->fmt_out );
 610     if( !id->id )
 611     {
 612         msg_Err( p_stream, "cannot add this stream" );
 613         return VLC_EGENERIC;
 614     }
 615
 616     return VLC_SUCCESS;
 617 }
 618
 619 void transcode_video_close( sout_stream_t *p_stream,
 620                                    sout_stream_id_t *id )
 621 {
 622     if( p_stream->p_sys->i_threads >= 1 )
 623     {
 624         vlc_mutex_lock( &p_stream->p_sys->lock_out );
 625         p_stream->p_sys->b_abort = true;
 626         vlc_cond_signal( &p_stream->p_sys->cond );
 627         vlc_mutex_unlock( &p_stream->p_sys->lock_out );
 628
 629         vlc_join( p_stream->p_sys->thread, NULL );
 630         vlc_mutex_destroy( &p_stream->p_sys->lock_out );
 631         vlc_cond_destroy( &p_stream->p_sys->cond );
 632
 633         picture_fifo_Delete( p_stream->p_sys->pp_pics );
 634         block_ChainRelease( p_stream->p_sys->p_buffers );
 635         p_stream->p_sys->pp_pics = NULL;
 636     }
 637
 638     /* Close decoder */
 639     if( id->p_decoder->p_module )
 640         module_unneed( id->p_decoder, id->p_decoder->p_module );
 641     if( id->p_decoder->p_description )
 642         vlc_meta_Delete( id->p_decoder->p_description );
 643
 644     free( id->p_decoder->p_owner );
 645
 646     /* Close encoder */
 647     if( id->p_encoder->p_module )
 648         module_unneed( id->p_encoder, id->p_encoder->p_module );
 649
 650     /* Close filters */
 651     if( id->p_f_chain )
 652         filter_chain_Delete( id->p_f_chain );
 653     if( id->p_uf_chain )
 654         filter_chain_Delete( id->p_uf_chain );
 655 }
 656
 657 static void OutputFrame( sout_stream_sys_t *p_sys, picture_t *p_pic, sout_stream_t *p_stream, sout_stream_id_t *id, block_t **out )
 658 {
 659
 660     picture_t *p_pic2 = NULL;
 661     bool b_need_duplicate=false;
 662     /* If input pts + input_frame_interval is lower than next_output_pts - output_frame_interval
 663      * Then the future input frame should fit better and we can drop this one
 664      *
 665      * Duplication need is checked in OutputFrame */
 666     if( ( p_pic->date + (mtime_t)id->i_input_frame_interval ) <
 667         ( date_Get( &id->next_output_pts ) ) )
 668     {
 669 #if 0
 670         msg_Dbg( p_stream, "dropping frame (%"PRId64" + %"PRId64" vs %"PRId64")",
 671                  p_pic->date, id->i_input_frame_interval, date_Get(&id->next_output_pts) );
 672 #endif
 673         picture_Release( p_pic );
 674         return;
 675     }
 676
 677     /*
 678      * Encoding
 679      */
 680     /* Check if we have a subpicture to overlay */
 681     if( p_sys->p_spu )
 682     {
 683         video_format_t fmt = id->p_encoder->fmt_in.video;
 684         if( fmt.i_visible_width <= 0 || fmt.i_visible_height <= 0 )
 685         {
 686             fmt.i_visible_width  = fmt.i_width;
 687             fmt.i_visible_height = fmt.i_height;
 688             fmt.i_x_offset       = 0;
 689             fmt.i_y_offset       = 0;
 690         }
 691
 692         subpicture_t *p_subpic = spu_Render( p_sys->p_spu, NULL, &fmt, &fmt,
 693                                              p_pic->date, p_pic->date, false );
 694
 695         /* Overlay subpicture */
 696         if( p_subpic )
 697         {
 698             if( picture_IsReferenced( p_pic ) && !filter_chain_GetLength( id->p_f_chain ) )
 699             {
 700                 /* We can't modify the picture, we need to duplicate it,
 701                  * in this point the picture is already p_encoder->fmt.in format*/
 702                 picture_t *p_tmp = video_new_buffer_encoder( id->p_encoder );
 703                 if( likely( p_tmp ) )
 704                 {
 705                     picture_Copy( p_tmp, p_pic );
 706                     picture_Release( p_pic );
 707                     p_pic = p_tmp;
 708                 }
 709             }
 710             if( unlikely( !p_sys->p_spu_blend ) )
 711                 p_sys->p_spu_blend = filter_NewBlend( VLC_OBJECT( p_sys->p_spu ), &fmt );
 712             if( likely( p_sys->p_spu_blend ) )
 713                 picture_BlendSubpicture( p_pic, p_sys->p_spu_blend, p_subpic );
 714             subpicture_Delete( p_subpic );
 715         }
 716     }
 717     /*This pts is handled, increase clock to next one*/
 718     date_Increment( &id->next_output_pts, id->p_encoder->fmt_in.video.i_frame_rate_base );
 719
 720     if( p_sys->i_threads == 0 )
 721     {
 722         block_t *p_block;
 723
 724         p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
 725         block_ChainAppend( out, p_block );
 726     }
 727
 728     /* we need to duplicate while next_output_pts + output_frame_interval < input_pts (next input pts)*/
 729     b_need_duplicate = ( date_Get( &id->next_output_pts ) + id->i_output_frame_interval ) <
 730                        ( date_Get( &id->interpolated_pts ) );
 731
 732     if( p_sys->i_threads )
 733     {
 734         if( p_sys->b_master_sync )
 735         {
 736             p_pic2 = video_new_buffer_encoder( id->p_encoder );
 737             if( likely( p_pic2 != NULL ) )
 738                 picture_Copy( p_pic2, p_pic );
 739         }
 740         vlc_mutex_lock( &p_sys->lock_out );
 741         picture_fifo_Push( p_sys->pp_pics, p_pic );
 742         vlc_cond_signal( &p_sys->cond );
 743         vlc_mutex_unlock( &p_sys->lock_out );
 744     }
 745
 746     while( (p_sys->b_master_sync && b_need_duplicate ))
 747     {
 748         if( p_sys->i_threads >= 1 )
 749         {
 750             picture_t *p_tmp = NULL;
 751             /* We can't modify the picture, we need to duplicate it */
 752             p_tmp = video_new_buffer_encoder( id->p_encoder );
 753             if( likely( p_tmp != NULL ) )
 754             {
 755                 picture_Copy( p_tmp, p_pic2 );
 756                 p_tmp->date = date_Get( &id->next_output_pts );
 757                 vlc_mutex_lock( &p_sys->lock_out );
 758                 picture_fifo_Push( p_sys->pp_pics, p_tmp );
 759                 vlc_cond_signal( &p_sys->cond );
 760                 vlc_mutex_unlock( &p_sys->lock_out );
 761             }
 762         }
 763         else
 764         {
 765             block_t *p_block;
 766             p_pic->date = date_Get( &id->next_output_pts );
 767             p_block = id->p_encoder->pf_encode_video(id->p_encoder, p_pic);
 768             block_ChainAppend( out, p_block );
 769         }
 770 #if 0
 771         msg_Dbg( p_stream, "duplicated frame");
 772 #endif
 773         date_Increment( &id->next_output_pts, id->p_encoder->fmt_in.video.i_frame_rate_base );
 774         b_need_duplicate = ( date_Get( &id->next_output_pts ) + id->i_output_frame_interval ) <
 775                            ( date_Get( &id->interpolated_pts ) );
 776     }
 777
 778     if( p_sys->i_threads && p_pic2 )
 779         picture_Release( p_pic2 );
 780     else if ( p_sys->i_threads == 0 )
 781         picture_Release( p_pic );
 782 }
 783
 784 int transcode_video_process( sout_stream_t *p_stream, sout_stream_id_t *id,
 785                                     block_t *in, block_t **out )
 786 {
 787     sout_stream_sys_t *p_sys = p_stream->p_sys;
 788     picture_t *p_pic = NULL;
 789     *out = NULL;
 790
 791     if( unlikely( in == NULL ) )
 792     {
 793         if( p_sys->i_threads == 0 )
 794         {
 795             block_t *p_block;
 796             do {
 797                 p_block = id->p_encoder->pf_encode_video(id->p_encoder, NULL );
 798                 block_ChainAppend( out, p_block );
 799             } while( p_block );
 800         }
 801         else
 802         {
 803             msg_Dbg( p_stream, "Flushing thread and waiting that");
 804             vlc_mutex_lock( &p_stream->p_sys->lock_out );
 805             p_stream->p_sys->b_abort = true;
 806             vlc_cond_signal( &p_stream->p_sys->cond );
 807             vlc_mutex_unlock( &p_stream->p_sys->lock_out );
 808
 809             vlc_join( p_stream->p_sys->thread, NULL );
 810             vlc_mutex_lock( &p_sys->lock_out );
 811             *out = p_sys->p_buffers;
 812             p_sys->p_buffers = NULL;
 813             vlc_mutex_unlock( &p_sys->lock_out );
 814
 815             msg_Dbg( p_stream, "Flushing done");
 816         }
 817         return VLC_SUCCESS;
 818     }
 819
 820
 821     while( (p_pic = id->p_decoder->pf_decode_video( id->p_decoder, &in )) )
 822     {
 823
 824         if( p_stream->p_sout->i_out_pace_nocontrol && p_sys->b_hurry_up )
 825         {
 826             mtime_t current_date = mdate();
 827             if( unlikely( (current_date - 50000) > p_pic->date ) )
 828             {
 829                 msg_Dbg( p_stream, "late picture skipped (%"PRId64")",
 830                          current_date - 50000 - p_pic->date );
 831                 picture_Release( p_pic );
 832                 continue;
 833             }
 834         }
 835
 836         if( unlikely (
 837              id->p_encoder->p_module &&
 838              !video_format_IsSimilar( &p_sys->fmt_input_video, &id->p_decoder->fmt_out.video )
 839             )
 840           )
 841         {
 842             msg_Info( p_stream, "aspect-ratio changed, reiniting. %i -> %i : %i -> %i.",
 843                         p_sys->fmt_input_video.i_sar_num, id->p_decoder->fmt_out.video.i_sar_num,
 844                         p_sys->fmt_input_video.i_sar_den, id->p_decoder->fmt_out.video.i_sar_den
 845                     );
 846             /* Close filters */
 847             if( id->p_f_chain )
 848                 filter_chain_Delete( id->p_f_chain );
 849             id->p_f_chain = NULL;
 850             if( id->p_uf_chain )
 851                 filter_chain_Delete( id->p_uf_chain );
 852             id->p_uf_chain = NULL;
 853
 854             /* Reinitialize filters */
 855             id->p_encoder->fmt_out.video.i_width  = p_sys->i_width & ~1;
 856             id->p_encoder->fmt_out.video.i_height = p_sys->i_height & ~1;
 857             id->p_encoder->fmt_out.video.i_sar_num = id->p_encoder->fmt_out.video.i_sar_den = 0;
 858
 859             transcode_video_filter_init( p_stream, id );
 860             transcode_video_encoder_init( p_stream, id );
 861             conversion_video_filter_append( id );
 862             memcpy( &p_sys->fmt_input_video, &id->p_decoder->fmt_out.video, sizeof(video_format_t));
 863         }
 864
 865
 866         if( unlikely( !id->p_encoder->p_module ) )
 867         {
 868             if( id->p_f_chain )
 869                 filter_chain_Delete( id->p_f_chain );
 870             if( id->p_uf_chain )
 871                 filter_chain_Delete( id->p_uf_chain );
 872             id->p_f_chain = id->p_uf_chain = NULL;
 873
 874             transcode_video_filter_init( p_stream, id );
 875             transcode_video_encoder_init( p_stream, id );
 876             conversion_video_filter_append( id );
 877             memcpy( &p_sys->fmt_input_video, &id->p_decoder->fmt_out.video, sizeof(video_format_t));
 878
 879             if( transcode_video_encoder_open( p_stream, id ) != VLC_SUCCESS )
 880             {
 881                 picture_Release( p_pic );
 882                 transcode_video_close( p_stream, id );
 883                 id->b_transcode = false;
 884                 return VLC_EGENERIC;
 885             }
 886         }
 887
 888         /*Input lipsync and drop check */
 889         if( p_sys->b_master_sync )
 890         {
 891             /* How much audio has drifted */
 892             mtime_t i_master_drift = p_sys->i_master_drift;
 893
 894             /* This is the pts input should have now with constant frame rate */
 895             mtime_t i_pts = date_Get( &id->interpolated_pts );
 896
 897             /* How much input pts has drifted */
 898             mtime_t i_video_drift = p_pic->date - i_pts;
 899
 900             /* Check that we are having lipsync with input here */
 901             if( unlikely ( ( (i_video_drift - i_master_drift ) > MASTER_SYNC_MAX_DRIFT
 902                           || (i_video_drift + i_master_drift ) < -MASTER_SYNC_MAX_DRIFT ) ) )
 903             {
 904                 msg_Warn( p_stream,
 905                     "video drift too big, resetting sync %"PRId64" to %"PRId64,
 906                     (i_video_drift + i_master_drift),
 907                     p_pic->date
 908                     );
 909                 date_Set( &id->interpolated_pts, p_pic->date );
 910                 date_Set( &id->next_output_pts, p_pic->date );
 911                 i_pts = date_Get( &id->interpolated_pts );
 912             }
 913
 914             /* Set the pts of the frame being encoded */
 915             p_pic->date = i_pts;
 916
 917             /* now take next input pts, pts dates are only enabled if p_module is set*/
 918             date_Increment( &id->interpolated_pts, id->p_decoder->fmt_out.video.i_frame_rate_base );
 919
 920
 921             /* If input pts + input_frame_interval is lower than next_output_pts - output_frame_interval
 922              * Then the future input frame should fit better and we can drop this one
 923              *
 924              * Duplication need is checked in OutputFrame */
 925             if( ( p_pic->date + (mtime_t)id->i_input_frame_interval ) <
 926                 ( date_Get( &id->next_output_pts ) ) )
 927             {
 928 #if 0
 929                 msg_Dbg( p_stream, "dropping frame (%"PRId64" + %"PRId64" vs %"PRId64")",
 930                          p_pic->date, id->i_input_frame_interval, date_Get(&id->next_output_pts) );
 931 #endif
 932                 picture_Release( p_pic );
 933                 continue;
 934             }
 935 #if 0
 936             msg_Dbg( p_stream, "not dropping frame");
 937 #endif
 938
 939             /* input calculated pts isn't necessary what pts output should be, so use output pts*/
 940             p_pic->date = date_Get( &id->next_output_pts );
 941
 942
 943         }
 944
 945         /* Run the filter and output chains; first with the picture,
 946          * and then with NULL as many times as we need until they
 947          * stop outputting frames.
 948          */
 949         for ( ;; ) {
 950             picture_t *p_filtered_pic = p_pic;
 951
 952             /* Run filter chain */
 953             if( id->p_f_chain )
 954                 p_filtered_pic = filter_chain_VideoFilter( id->p_f_chain, p_filtered_pic );
 955             if( !p_filtered_pic )
 956                 break;
 957
 958             for ( ;; ) {
 959                 picture_t *p_user_filtered_pic = p_filtered_pic;
 960
 961                 /* Run user specified filter chain */
 962                 if( id->p_uf_chain )
 963                     p_user_filtered_pic = filter_chain_VideoFilter( id->p_uf_chain, p_user_filtered_pic );
 964                 if( !p_user_filtered_pic )
 965                     break;
 966
 967                 OutputFrame( p_sys, p_user_filtered_pic, p_stream, id, out );
 968
 969                 p_filtered_pic = NULL;
 970             }
 971
 972             p_pic = NULL;
 973         }
 974     }
 975
 976     if( p_sys->i_threads >= 1 )
 977     {
 978         /* Pick up any return data the encoder thread wants to output. */
 979         vlc_mutex_lock( &p_sys->lock_out );
 980         *out = p_sys->p_buffers;
 981         p_sys->p_buffers = NULL;
 982         vlc_mutex_unlock( &p_sys->lock_out );
 983     }
 984
 985     return VLC_SUCCESS;
 986 }
 987
 988 bool transcode_video_add( sout_stream_t *p_stream, es_format_t *p_fmt,
 989                                 sout_stream_id_t *id )
 990 {
 991     sout_stream_sys_t *p_sys = p_stream->p_sys;
 992
 993     msg_Dbg( p_stream,
 994              "creating video transcoding from fcc=`%4.4s' to fcc=`%4.4s'",
 995              (char*)&p_fmt->i_codec, (char*)&p_sys->i_vcodec );
 996
 997     /* Complete destination format */
 998     id->p_encoder->fmt_out.i_codec = p_sys->i_vcodec;
 999     id->p_encoder->fmt_out.video.i_width  = p_sys->i_width & ~1;
1000     id->p_encoder->fmt_out.video.i_height = p_sys->i_height & ~1;
1001     id->p_encoder->fmt_out.i_bitrate = p_sys->i_vbitrate;
1002
1003     /* Build decoder -> filter -> encoder chain */
1004     if( transcode_video_new( p_stream, id ) )
1005     {
1006         msg_Err( p_stream, "cannot create video chain" );
1007         return false;
1008     }
1009
1010     /* Stream will be added later on because we don't know
1011      * all the characteristics of the decoded stream yet */
1012     id->b_transcode = true;
1013
1014     if( p_sys->f_fps > 0 )
1015     {
1016         id->p_encoder->fmt_out.video.i_frame_rate = (p_sys->f_fps * ENC_FRAMERATE_BASE);
1017         id->p_encoder->fmt_out.video.i_frame_rate_base = ENC_FRAMERATE_BASE;
1018     }
1019
1020     return true;
1021 }
1022