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     const 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     if( p_stream->p_sys->psz_vf2 )
 326     {
 327         const es_format_t *p_fmt_out;
 328         id->p_uf_chain = filter_chain_New( p_stream, "video filter2",
 329                                           true,
 330                            transcode_video_filter_allocation_init,
 331                            transcode_video_filter_allocation_clear,
 332                            p_stream->p_sys );
 333         filter_chain_Reset( id->p_uf_chain, &id->p_encoder->fmt_in,
 334                             &id->p_encoder->fmt_in );
 335         filter_chain_AppendFromString( id->p_uf_chain, p_stream->p_sys->psz_vf2 );
 336         p_fmt_out = filter_chain_GetFmtOut( id->p_uf_chain );
 337         es_format_Copy( &id->p_encoder->fmt_in, p_fmt_out );
 338         id->p_encoder->fmt_out.video.i_width =
 339             id->p_encoder->fmt_in.video.i_width;
 340         id->p_encoder->fmt_out.video.i_height =
 341             id->p_encoder->fmt_in.video.i_height;
 342         id->p_encoder->fmt_out.video.i_sar_num =
 343             id->p_encoder->fmt_in.video.i_sar_num;
 344         id->p_encoder->fmt_out.video.i_sar_den =
 345             id->p_encoder->fmt_in.video.i_sar_den;
 346     }
 347
 348 }
 349
 350 /* Take care of the scaling and chroma conversions. */
 351 static void conversion_video_filter_append( sout_stream_id_t *id )
 352 {
 353     const es_format_t *p_fmt_out = &id->p_decoder->fmt_out;
 354     if( id->p_f_chain )
 355         p_fmt_out = filter_chain_GetFmtOut( id->p_f_chain );
 356     if( id->p_uf_chain )
 357         p_fmt_out = filter_chain_GetFmtOut( id->p_uf_chain );
 358
 359     if( ( p_fmt_out->video.i_chroma != id->p_encoder->fmt_in.video.i_chroma ) ||
 360         ( p_fmt_out->video.i_width != id->p_encoder->fmt_in.video.i_width ) ||
 361         ( p_fmt_out->video.i_height != id->p_encoder->fmt_in.video.i_height ) )
 362     {
 363         filter_chain_AppendFilter( id->p_f_chain,
 364                                    NULL, NULL,
 365                                    p_fmt_out,
 366                                    &id->p_encoder->fmt_in );
 367     }
 368 }
 369
 370 static void transcode_video_encoder_init( sout_stream_t *p_stream,
 371                                           sout_stream_id_t *id )
 372 {
 373     sout_stream_sys_t *p_sys = p_stream->p_sys;
 374
 375     const es_format_t *p_fmt_out = &id->p_decoder->fmt_out;
 376     if( id->p_f_chain ) {
 377         p_fmt_out = filter_chain_GetFmtOut( id->p_f_chain );
 378     }
 379     if( id->p_uf_chain ) {
 380         p_fmt_out = filter_chain_GetFmtOut( id->p_uf_chain );
 381     }
 382
 383     /* Calculate scaling
 384      * width/height of source */
 385     int i_src_visible_width = p_fmt_out->video.i_visible_width;
 386     int i_src_visible_height = p_fmt_out->video.i_visible_height;
 387
 388     if (i_src_visible_width == 0)
 389         i_src_visible_width = p_fmt_out->video.i_width;
 390     if (i_src_visible_height == 0)
 391         i_src_visible_height = p_fmt_out->video.i_height;
 392
 393
 394     /* with/height scaling */
 395     float f_scale_width = 1;
 396     float f_scale_height = 1;
 397
 398     /* aspect ratio */
 399     float f_aspect = (double)p_fmt_out->video.i_sar_num *
 400                      p_fmt_out->video.i_width /
 401                      p_fmt_out->video.i_sar_den /
 402                      p_fmt_out->video.i_height;
 403
 404     msg_Dbg( p_stream, "decoder aspect is %f:1", f_aspect );
 405
 406     /* Change f_aspect from source frame to source pixel */
 407     f_aspect = f_aspect * i_src_visible_height / i_src_visible_width;
 408     msg_Dbg( p_stream, "source pixel aspect is %f:1", f_aspect );
 409
 410     /* Calculate scaling factor for specified parameters */
 411     if( id->p_encoder->fmt_out.video.i_width <= 0 &&
 412         id->p_encoder->fmt_out.video.i_height <= 0 && p_sys->f_scale )
 413     {
 414         /* Global scaling. Make sure width will remain a factor of 16 */
 415         float f_real_scale;
 416         int  i_new_height;
 417         int i_new_width = i_src_visible_width * p_sys->f_scale;
 418
 419         if( i_new_width % 16 <= 7 && i_new_width >= 16 )
 420             i_new_width -= i_new_width % 16;
 421         else
 422             i_new_width += 16 - i_new_width % 16;
 423
 424         f_real_scale = (float)( i_new_width ) / (float) i_src_visible_width;
 425
 426         i_new_height = __MAX( 16, i_src_visible_height * (float)f_real_scale );
 427
 428         f_scale_width = f_real_scale;
 429         f_scale_height = (float) i_new_height / (float) i_src_visible_height;
 430     }
 431     else if( id->p_encoder->fmt_out.video.i_width > 0 &&
 432              id->p_encoder->fmt_out.video.i_height <= 0 )
 433     {
 434         /* Only width specified */
 435         f_scale_width = (float)id->p_encoder->fmt_out.video.i_width/i_src_visible_width;
 436         f_scale_height = f_scale_width;
 437     }
 438     else if( id->p_encoder->fmt_out.video.i_width <= 0 &&
 439              id->p_encoder->fmt_out.video.i_height > 0 )
 440     {
 441          /* Only height specified */
 442          f_scale_height = (float)id->p_encoder->fmt_out.video.i_height/i_src_visible_height;
 443          f_scale_width = f_scale_height;
 444      }
 445      else if( id->p_encoder->fmt_out.video.i_width > 0 &&
 446               id->p_encoder->fmt_out.video.i_height > 0 )
 447      {
 448          /* Width and height specified */
 449          f_scale_width = (float)id->p_encoder->fmt_out.video.i_width/i_src_visible_width;
 450          f_scale_height = (float)id->p_encoder->fmt_out.video.i_height/i_src_visible_height;
 451      }
 452
 453      /* check maxwidth and maxheight */
 454      if( p_sys->i_maxwidth && f_scale_width > (float)p_sys->i_maxwidth /
 455                                                      i_src_visible_width )
 456      {
 457          f_scale_width = (float)p_sys->i_maxwidth / i_src_visible_width;
 458      }
 459
 460      if( p_sys->i_maxheight && f_scale_height > (float)p_sys->i_maxheight /
 461                                                        i_src_visible_height )
 462      {
 463          f_scale_height = (float)p_sys->i_maxheight / i_src_visible_height;
 464      }
 465
 466
 467      /* Change aspect ratio from source pixel to scaled pixel */
 468      f_aspect = f_aspect * f_scale_height / f_scale_width;
 469      msg_Dbg( p_stream, "scaled pixel aspect is %f:1", f_aspect );
 470
 471      /* f_scale_width and f_scale_height are now final */
 472      /* Calculate width, height from scaling
 473       * Make sure its multiple of 2
 474       */
 475      /* width/height of output stream */
 476      int i_dst_visible_width =  2 * (int)(f_scale_width*i_src_visible_width/2+0.5);
 477      int i_dst_visible_height = 2 * (int)(f_scale_height*i_src_visible_height/2+0.5);
 478      int i_dst_width =  2 * (int)(f_scale_width*p_fmt_out->video.i_width/2+0.5);
 479      int i_dst_height = 2 * (int)(f_scale_height*p_fmt_out->video.i_height/2+0.5);
 480
 481      /* Change aspect ratio from scaled pixel to output frame */
 482      f_aspect = f_aspect * i_dst_visible_width / i_dst_visible_height;
 483
 484      /* Store calculated values */
 485      id->p_encoder->fmt_out.video.i_width = i_dst_width;
 486      id->p_encoder->fmt_out.video.i_visible_width = i_dst_visible_width;
 487      id->p_encoder->fmt_out.video.i_height = i_dst_height;
 488      id->p_encoder->fmt_out.video.i_visible_height = i_dst_visible_height;
 489
 490      id->p_encoder->fmt_in.video.i_width = i_dst_width;
 491      id->p_encoder->fmt_in.video.i_visible_width = i_dst_visible_width;
 492      id->p_encoder->fmt_in.video.i_height = i_dst_height;
 493      id->p_encoder->fmt_in.video.i_visible_height = i_dst_visible_height;
 494
 495      msg_Dbg( p_stream, "source %ix%i, destination %ix%i",
 496          i_src_visible_width, i_src_visible_height,
 497          i_dst_visible_width, i_dst_visible_height
 498      );
 499
 500     /* Handle frame rate conversion */
 501     if( !id->p_encoder->fmt_out.video.i_frame_rate ||
 502         !id->p_encoder->fmt_out.video.i_frame_rate_base )
 503     {
 504         if( p_fmt_out->video.i_frame_rate &&
 505             p_fmt_out->video.i_frame_rate_base )
 506         {
 507             id->p_encoder->fmt_out.video.i_frame_rate =
 508                 p_fmt_out->video.i_frame_rate;
 509             id->p_encoder->fmt_out.video.i_frame_rate_base =
 510                 p_fmt_out->video.i_frame_rate_base;
 511         }
 512         else
 513         {
 514             /* Pick a sensible default value */
 515             id->p_encoder->fmt_out.video.i_frame_rate = ENC_FRAMERATE;
 516             id->p_encoder->fmt_out.video.i_frame_rate_base = ENC_FRAMERATE_BASE;
 517         }
 518     }
 519
 520     id->p_encoder->fmt_in.video.i_frame_rate =
 521         id->p_encoder->fmt_out.video.i_frame_rate;
 522     id->p_encoder->fmt_in.video.i_frame_rate_base =
 523         id->p_encoder->fmt_out.video.i_frame_rate_base;
 524
 525     vlc_ureduce( &id->p_encoder->fmt_in.video.i_frame_rate,
 526         &id->p_encoder->fmt_in.video.i_frame_rate_base,
 527         id->p_encoder->fmt_in.video.i_frame_rate,
 528         id->p_encoder->fmt_in.video.i_frame_rate_base,
 529         0 );
 530      msg_Dbg( p_stream, "source fps %d/%d, destination %d/%d",
 531         id->p_decoder->fmt_out.video.i_frame_rate,
 532         id->p_decoder->fmt_out.video.i_frame_rate_base,
 533         id->p_encoder->fmt_in.video.i_frame_rate,
 534         id->p_encoder->fmt_in.video.i_frame_rate_base );
 535
 536     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;
 537     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;
 538     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,
 539                         id->i_output_frame_interval, id->p_encoder->fmt_in.video.i_frame_rate_base );
 540
 541     date_Init( &id->interpolated_pts,
 542                id->p_decoder->fmt_out.video.i_frame_rate,
 543                1 );
 544     date_Init( &id->next_output_pts,
 545                id->p_encoder->fmt_in.video.i_frame_rate,
 546                1 );
 547
 548     /* Check whether a particular aspect ratio was requested */
 549     if( id->p_encoder->fmt_out.video.i_sar_num <= 0 ||
 550         id->p_encoder->fmt_out.video.i_sar_den <= 0 )
 551     {
 552         vlc_ureduce( &id->p_encoder->fmt_out.video.i_sar_num,
 553                      &id->p_encoder->fmt_out.video.i_sar_den,
 554                      (uint64_t)p_fmt_out->video.i_sar_num * i_src_visible_width  * i_dst_visible_height,
 555                      (uint64_t)p_fmt_out->video.i_sar_den * i_src_visible_height * i_dst_visible_width,
 556                      0 );
 557     }
 558     else
 559     {
 560         vlc_ureduce( &id->p_encoder->fmt_out.video.i_sar_num,
 561                      &id->p_encoder->fmt_out.video.i_sar_den,
 562                      id->p_encoder->fmt_out.video.i_sar_num,
 563                      id->p_encoder->fmt_out.video.i_sar_den,
 564                      0 );
 565     }
 566
 567     id->p_encoder->fmt_in.video.i_sar_num =
 568         id->p_encoder->fmt_out.video.i_sar_num;
 569     id->p_encoder->fmt_in.video.i_sar_den =
 570         id->p_encoder->fmt_out.video.i_sar_den;
 571
 572     msg_Dbg( p_stream, "encoder aspect is %i:%i",
 573              id->p_encoder->fmt_out.video.i_sar_num * id->p_encoder->fmt_out.video.i_width,
 574              id->p_encoder->fmt_out.video.i_sar_den * id->p_encoder->fmt_out.video.i_height );
 575
 576 }
 577
 578 static int transcode_video_encoder_open( sout_stream_t *p_stream,
 579                                          sout_stream_id_t *id )
 580 {
 581     sout_stream_sys_t *p_sys = p_stream->p_sys;
 582
 583
 584     msg_Dbg( p_stream, "destination (after video filters) %ix%i",
 585              id->p_encoder->fmt_in.video.i_width,
 586              id->p_encoder->fmt_in.video.i_height );
 587
 588     id->p_encoder->p_module =
 589         module_need( id->p_encoder, "encoder", p_sys->psz_venc, true );
 590     if( !id->p_encoder->p_module )
 591     {
 592         msg_Err( p_stream, "cannot find video encoder (module:%s fourcc:%4.4s)",
 593                  p_sys->psz_venc ? p_sys->psz_venc : "any",
 594                  (char *)&p_sys->i_vcodec );
 595         return VLC_EGENERIC;
 596     }
 597
 598     id->p_encoder->fmt_in.video.i_chroma = id->p_encoder->fmt_in.i_codec;
 599
 600     /*  */
 601     id->p_encoder->fmt_out.i_codec =
 602         vlc_fourcc_GetCodec( VIDEO_ES, id->p_encoder->fmt_out.i_codec );
 603
 604     id->id = sout_StreamIdAdd( p_stream->p_next, &id->p_encoder->fmt_out );
 605     if( !id->id )
 606     {
 607         msg_Err( p_stream, "cannot add this stream" );
 608         return VLC_EGENERIC;
 609     }
 610
 611     return VLC_SUCCESS;
 612 }
 613
 614 void transcode_video_close( sout_stream_t *p_stream,
 615                                    sout_stream_id_t *id )
 616 {
 617     if( p_stream->p_sys->i_threads >= 1 )
 618     {
 619         vlc_mutex_lock( &p_stream->p_sys->lock_out );
 620         p_stream->p_sys->b_abort = true;
 621         vlc_cond_signal( &p_stream->p_sys->cond );
 622         vlc_mutex_unlock( &p_stream->p_sys->lock_out );
 623
 624         vlc_join( p_stream->p_sys->thread, NULL );
 625         vlc_mutex_destroy( &p_stream->p_sys->lock_out );
 626         vlc_cond_destroy( &p_stream->p_sys->cond );
 627
 628         picture_fifo_Delete( p_stream->p_sys->pp_pics );
 629         block_ChainRelease( p_stream->p_sys->p_buffers );
 630         p_stream->p_sys->pp_pics = NULL;
 631     }
 632
 633     /* Close decoder */
 634     if( id->p_decoder->p_module )
 635         module_unneed( id->p_decoder, id->p_decoder->p_module );
 636     if( id->p_decoder->p_description )
 637         vlc_meta_Delete( id->p_decoder->p_description );
 638
 639     free( id->p_decoder->p_owner );
 640
 641     /* Close encoder */
 642     if( id->p_encoder->p_module )
 643         module_unneed( id->p_encoder, id->p_encoder->p_module );
 644
 645     /* Close filters */
 646     if( id->p_f_chain )
 647         filter_chain_Delete( id->p_f_chain );
 648     if( id->p_uf_chain )
 649         filter_chain_Delete( id->p_uf_chain );
 650 }
 651
 652 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 )
 653 {
 654
 655     picture_t *p_pic2 = NULL;
 656     bool b_need_duplicate=false;
 657     /* If input pts + input_frame_interval is lower than next_output_pts - output_frame_interval
 658      * Then the future input frame should fit better and we can drop this one
 659      *
 660      * Duplication need is checked in OutputFrame */
 661     if( ( p_pic->date + (mtime_t)id->i_input_frame_interval ) <
 662         ( date_Get( &id->next_output_pts ) ) )
 663     {
 664 #if 0
 665         msg_Dbg( p_stream, "dropping frame (%"PRId64" + %"PRId64" vs %"PRId64")",
 666                  p_pic->date, id->i_input_frame_interval, date_Get(&id->next_output_pts) );
 667 #endif
 668         picture_Release( p_pic );
 669         return;
 670     }
 671
 672     /*
 673      * Encoding
 674      */
 675     /* Check if we have a subpicture to overlay */
 676     if( p_sys->p_spu )
 677     {
 678         video_format_t fmt = id->p_encoder->fmt_in.video;
 679         if( fmt.i_visible_width <= 0 || fmt.i_visible_height <= 0 )
 680         {
 681             fmt.i_visible_width  = fmt.i_width;
 682             fmt.i_visible_height = fmt.i_height;
 683             fmt.i_x_offset       = 0;
 684             fmt.i_y_offset       = 0;
 685         }
 686
 687         subpicture_t *p_subpic = spu_Render( p_sys->p_spu, NULL, &fmt, &fmt,
 688                                              p_pic->date, p_pic->date, false );
 689
 690         /* Overlay subpicture */
 691         if( p_subpic )
 692         {
 693             if( picture_IsReferenced( p_pic ) && !filter_chain_GetLength( id->p_f_chain ) )
 694             {
 695                 /* We can't modify the picture, we need to duplicate it,
 696                  * in this point the picture is already p_encoder->fmt.in format*/
 697                 picture_t *p_tmp = video_new_buffer_encoder( id->p_encoder );
 698                 if( likely( p_tmp ) )
 699                 {
 700                     picture_Copy( p_tmp, p_pic );
 701                     picture_Release( p_pic );
 702                     p_pic = p_tmp;
 703                 }
 704             }
 705             if( unlikely( !p_sys->p_spu_blend ) )
 706                 p_sys->p_spu_blend = filter_NewBlend( VLC_OBJECT( p_sys->p_spu ), &fmt );
 707             if( likely( p_sys->p_spu_blend ) )
 708                 picture_BlendSubpicture( p_pic, p_sys->p_spu_blend, p_subpic );
 709             subpicture_Delete( p_subpic );
 710         }
 711     }
 712     /*This pts is handled, increase clock to next one*/
 713     date_Increment( &id->next_output_pts, id->p_encoder->fmt_in.video.i_frame_rate_base );
 714
 715     if( p_sys->i_threads == 0 )
 716     {
 717         block_t *p_block;
 718
 719         p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
 720         block_ChainAppend( out, p_block );
 721     }
 722
 723     /* we need to duplicate while next_output_pts + output_frame_interval < input_pts (next input pts)*/
 724     b_need_duplicate = ( date_Get( &id->next_output_pts ) + id->i_output_frame_interval ) <
 725                        ( date_Get( &id->interpolated_pts ) );
 726
 727     if( p_sys->i_threads )
 728     {
 729         if( p_sys->b_master_sync )
 730         {
 731             p_pic2 = video_new_buffer_encoder( id->p_encoder );
 732             if( likely( p_pic2 != NULL ) )
 733                 picture_Copy( p_pic2, p_pic );
 734         }
 735         vlc_mutex_lock( &p_sys->lock_out );
 736         picture_fifo_Push( p_sys->pp_pics, p_pic );
 737         vlc_cond_signal( &p_sys->cond );
 738         vlc_mutex_unlock( &p_sys->lock_out );
 739     }
 740
 741     while( (p_sys->b_master_sync && b_need_duplicate ))
 742     {
 743         if( p_sys->i_threads >= 1 )
 744         {
 745             picture_t *p_tmp = NULL;
 746             /* We can't modify the picture, we need to duplicate it */
 747             p_tmp = video_new_buffer_encoder( id->p_encoder );
 748             if( likely( p_tmp != NULL ) )
 749             {
 750                 picture_Copy( p_tmp, p_pic2 );
 751                 p_tmp->date = date_Get( &id->next_output_pts );
 752                 vlc_mutex_lock( &p_sys->lock_out );
 753                 picture_fifo_Push( p_sys->pp_pics, p_tmp );
 754                 vlc_cond_signal( &p_sys->cond );
 755                 vlc_mutex_unlock( &p_sys->lock_out );
 756             }
 757         }
 758         else
 759         {
 760             block_t *p_block;
 761             p_pic->date = date_Get( &id->next_output_pts );
 762             p_block = id->p_encoder->pf_encode_video(id->p_encoder, p_pic);
 763             block_ChainAppend( out, p_block );
 764         }
 765 #if 0
 766         msg_Dbg( p_stream, "duplicated frame");
 767 #endif
 768         date_Increment( &id->next_output_pts, id->p_encoder->fmt_in.video.i_frame_rate_base );
 769         b_need_duplicate = ( date_Get( &id->next_output_pts ) + id->i_output_frame_interval ) <
 770                            ( date_Get( &id->interpolated_pts ) );
 771     }
 772
 773     if( p_sys->i_threads && p_pic2 )
 774         picture_Release( p_pic2 );
 775     else if ( p_sys->i_threads == 0 )
 776         picture_Release( p_pic );
 777 }
 778
 779 int transcode_video_process( sout_stream_t *p_stream, sout_stream_id_t *id,
 780                                     block_t *in, block_t **out )
 781 {
 782     sout_stream_sys_t *p_sys = p_stream->p_sys;
 783     picture_t *p_pic = NULL;
 784     *out = NULL;
 785
 786     if( unlikely( in == NULL ) )
 787     {
 788         if( p_sys->i_threads == 0 )
 789         {
 790             block_t *p_block;
 791             do {
 792                 p_block = id->p_encoder->pf_encode_video(id->p_encoder, NULL );
 793                 block_ChainAppend( out, p_block );
 794             } while( p_block );
 795         }
 796         else
 797         {
 798             msg_Dbg( p_stream, "Flushing thread and waiting that");
 799             vlc_mutex_lock( &p_stream->p_sys->lock_out );
 800             p_stream->p_sys->b_abort = true;
 801             vlc_cond_signal( &p_stream->p_sys->cond );
 802             vlc_mutex_unlock( &p_stream->p_sys->lock_out );
 803
 804             vlc_join( p_stream->p_sys->thread, NULL );
 805             vlc_mutex_lock( &p_sys->lock_out );
 806             *out = p_sys->p_buffers;
 807             p_sys->p_buffers = NULL;
 808             vlc_mutex_unlock( &p_sys->lock_out );
 809
 810             msg_Dbg( p_stream, "Flushing done");
 811         }
 812         return VLC_SUCCESS;
 813     }
 814
 815
 816     while( (p_pic = id->p_decoder->pf_decode_video( id->p_decoder, &in )) )
 817     {
 818
 819         if( p_stream->p_sout->i_out_pace_nocontrol && p_sys->b_hurry_up )
 820         {
 821             mtime_t current_date = mdate();
 822             if( unlikely( (current_date - 50000) > p_pic->date ) )
 823             {
 824                 msg_Dbg( p_stream, "late picture skipped (%"PRId64")",
 825                          current_date - 50000 - p_pic->date );
 826                 picture_Release( p_pic );
 827                 continue;
 828             }
 829         }
 830
 831         if( unlikely (
 832              id->p_encoder->p_module &&
 833              !video_format_IsSimilar( &p_sys->fmt_input_video, &id->p_decoder->fmt_out.video )
 834             )
 835           )
 836         {
 837             msg_Info( p_stream, "aspect-ratio changed, reiniting. %i -> %i : %i -> %i.",
 838                         p_sys->fmt_input_video.i_sar_num, id->p_decoder->fmt_out.video.i_sar_num,
 839                         p_sys->fmt_input_video.i_sar_den, id->p_decoder->fmt_out.video.i_sar_den
 840                     );
 841             /* Close filters */
 842             if( id->p_f_chain )
 843                 filter_chain_Delete( id->p_f_chain );
 844             id->p_f_chain = NULL;
 845             if( id->p_uf_chain )
 846                 filter_chain_Delete( id->p_uf_chain );
 847             id->p_uf_chain = NULL;
 848
 849             /* Reinitialize filters */
 850             id->p_encoder->fmt_out.video.i_width  = p_sys->i_width & ~1;
 851             id->p_encoder->fmt_out.video.i_height = p_sys->i_height & ~1;
 852             id->p_encoder->fmt_out.video.i_sar_num = id->p_encoder->fmt_out.video.i_sar_den = 0;
 853
 854             transcode_video_filter_init( p_stream, id );
 855             transcode_video_encoder_init( p_stream, id );
 856             conversion_video_filter_append( id );
 857             memcpy( &p_sys->fmt_input_video, &id->p_decoder->fmt_out.video, sizeof(video_format_t));
 858         }
 859
 860
 861         if( unlikely( !id->p_encoder->p_module ) )
 862         {
 863             if( id->p_f_chain )
 864                 filter_chain_Delete( id->p_f_chain );
 865             if( id->p_uf_chain )
 866                 filter_chain_Delete( id->p_uf_chain );
 867             id->p_f_chain = id->p_uf_chain = NULL;
 868
 869             transcode_video_filter_init( p_stream, id );
 870             transcode_video_encoder_init( p_stream, id );
 871             conversion_video_filter_append( id );
 872             memcpy( &p_sys->fmt_input_video, &id->p_decoder->fmt_out.video, sizeof(video_format_t));
 873
 874             if( transcode_video_encoder_open( p_stream, id ) != VLC_SUCCESS )
 875             {
 876                 picture_Release( p_pic );
 877                 transcode_video_close( p_stream, id );
 878                 id->b_transcode = false;
 879                 return VLC_EGENERIC;
 880             }
 881         }
 882
 883         /*Input lipsync and drop check */
 884         if( p_sys->b_master_sync )
 885         {
 886             /* How much audio has drifted */
 887             mtime_t i_master_drift = p_sys->i_master_drift;
 888
 889             /* This is the pts input should have now with constant frame rate */
 890             mtime_t i_pts = date_Get( &id->interpolated_pts );
 891
 892             /* How much input pts has drifted */
 893             mtime_t i_video_drift = p_pic->date - i_pts;
 894
 895             /* Check that we are having lipsync with input here */
 896             if( unlikely ( ( (i_video_drift - i_master_drift ) > MASTER_SYNC_MAX_DRIFT
 897                           || (i_video_drift + i_master_drift ) < -MASTER_SYNC_MAX_DRIFT ) ) )
 898             {
 899                 msg_Warn( p_stream,
 900                     "video drift too big, resetting sync %"PRId64" to %"PRId64,
 901                     (i_video_drift + i_master_drift),
 902                     p_pic->date
 903                     );
 904                 date_Set( &id->interpolated_pts, p_pic->date );
 905                 date_Set( &id->next_output_pts, p_pic->date );
 906                 i_pts = date_Get( &id->interpolated_pts );
 907             }
 908
 909             /* Set the pts of the frame being encoded */
 910             p_pic->date = i_pts;
 911
 912             /* now take next input pts, pts dates are only enabled if p_module is set*/
 913             date_Increment( &id->interpolated_pts, id->p_decoder->fmt_out.video.i_frame_rate_base );
 914
 915
 916             /* If input pts + input_frame_interval is lower than next_output_pts - output_frame_interval
 917              * Then the future input frame should fit better and we can drop this one
 918              *
 919              * Duplication need is checked in OutputFrame */
 920             if( ( p_pic->date + (mtime_t)id->i_input_frame_interval ) <
 921                 ( date_Get( &id->next_output_pts ) ) )
 922             {
 923 #if 0
 924                 msg_Dbg( p_stream, "dropping frame (%"PRId64" + %"PRId64" vs %"PRId64")",
 925                          p_pic->date, id->i_input_frame_interval, date_Get(&id->next_output_pts) );
 926 #endif
 927                 picture_Release( p_pic );
 928                 continue;
 929             }
 930 #if 0
 931             msg_Dbg( p_stream, "not dropping frame");
 932 #endif
 933
 934             /* input calculated pts isn't necessary what pts output should be, so use output pts*/
 935             p_pic->date = date_Get( &id->next_output_pts );
 936
 937
 938         }
 939
 940         /* Run the filter and output chains; first with the picture,
 941          * and then with NULL as many times as we need until they
 942          * stop outputting frames.
 943          */
 944         for ( ;; ) {
 945             picture_t *p_filtered_pic = p_pic;
 946
 947             /* Run filter chain */
 948             if( id->p_f_chain )
 949                 p_filtered_pic = filter_chain_VideoFilter( id->p_f_chain, p_filtered_pic );
 950             if( !p_filtered_pic )
 951                 break;
 952
 953             for ( ;; ) {
 954                 picture_t *p_user_filtered_pic = p_filtered_pic;
 955
 956                 /* Run user specified filter chain */
 957                 if( id->p_uf_chain )
 958                     p_user_filtered_pic = filter_chain_VideoFilter( id->p_uf_chain, p_user_filtered_pic );
 959                 if( !p_user_filtered_pic )
 960                     break;
 961
 962                 OutputFrame( p_sys, p_user_filtered_pic, p_stream, id, out );
 963
 964                 p_filtered_pic = NULL;
 965             }
 966
 967             p_pic = NULL;
 968         }
 969     }
 970
 971     if( p_sys->i_threads >= 1 )
 972     {
 973         /* Pick up any return data the encoder thread wants to output. */
 974         vlc_mutex_lock( &p_sys->lock_out );
 975         *out = p_sys->p_buffers;
 976         p_sys->p_buffers = NULL;
 977         vlc_mutex_unlock( &p_sys->lock_out );
 978     }
 979
 980     return VLC_SUCCESS;
 981 }
 982
 983 bool transcode_video_add( sout_stream_t *p_stream, es_format_t *p_fmt,
 984                                 sout_stream_id_t *id )
 985 {
 986     sout_stream_sys_t *p_sys = p_stream->p_sys;
 987
 988     msg_Dbg( p_stream,
 989              "creating video transcoding from fcc=`%4.4s' to fcc=`%4.4s'",
 990              (char*)&p_fmt->i_codec, (char*)&p_sys->i_vcodec );
 991
 992     /* Complete destination format */
 993     id->p_encoder->fmt_out.i_codec = p_sys->i_vcodec;
 994     id->p_encoder->fmt_out.video.i_width  = p_sys->i_width & ~1;
 995     id->p_encoder->fmt_out.video.i_height = p_sys->i_height & ~1;
 996     id->p_encoder->fmt_out.i_bitrate = p_sys->i_vbitrate;
 997
 998     /* Build decoder -> filter -> encoder chain */
 999     if( transcode_video_new( p_stream, id ) )
1000     {
1001         msg_Err( p_stream, "cannot create video chain" );
1002         return false;
1003     }
1004
1005     /* Stream will be added later on because we don't know
1006      * all the characteristics of the decoded stream yet */
1007     id->b_transcode = true;
1008
1009     if( p_sys->f_fps > 0 )
1010     {
1011         id->p_encoder->fmt_out.video.i_frame_rate = (p_sys->f_fps * ENC_FRAMERATE_BASE);
1012         id->p_encoder->fmt_out.video.i_frame_rate_base = ENC_FRAMERATE_BASE;
1013     }
1014
1015     return true;
1016 }
1017