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  *
 352  * XXX: Shouldn't this really be after p_uf_chain, not p_f_chain,
 353  * in case p_uf_chain changes the format?
 354  */
 355 static void conversion_video_filter_append( sout_stream_id_t *id )
 356 {
 357     const es_format_t *p_fmt_out = &id->p_decoder->fmt_out;
 358     if( id->p_f_chain )
 359         p_fmt_out = filter_chain_GetFmtOut( id->p_f_chain );
 360
 361     if( ( p_fmt_out->video.i_chroma != id->p_encoder->fmt_in.video.i_chroma ) ||
 362         ( p_fmt_out->video.i_width != id->p_encoder->fmt_in.video.i_width ) ||
 363         ( p_fmt_out->video.i_height != id->p_encoder->fmt_in.video.i_height ) )
 364     {
 365         filter_chain_AppendFilter( id->p_f_chain,
 366                                    NULL, NULL,
 367                                    p_fmt_out,
 368                                    &id->p_encoder->fmt_in );
 369     }
 370 }
 371
 372 static void transcode_video_encoder_init( sout_stream_t *p_stream,
 373                                           sout_stream_id_t *id )
 374 {
 375     sout_stream_sys_t *p_sys = p_stream->p_sys;
 376
 377     const es_format_t *p_fmt_out = &id->p_decoder->fmt_out;
 378     if( id->p_f_chain ) {
 379         p_fmt_out = filter_chain_GetFmtOut( id->p_f_chain );
 380     }
 381     if( id->p_uf_chain ) {
 382         p_fmt_out = filter_chain_GetFmtOut( id->p_uf_chain );
 383     }
 384
 385     /* Calculate scaling
 386      * width/height of source */
 387     int i_src_visible_width = p_fmt_out->video.i_visible_width;
 388     int i_src_visible_height = p_fmt_out->video.i_visible_height;
 389
 390     if (i_src_visible_width == 0)
 391         i_src_visible_width = p_fmt_out->video.i_width;
 392     if (i_src_visible_height == 0)
 393         i_src_visible_height = p_fmt_out->video.i_height;
 394
 395
 396     /* with/height scaling */
 397     float f_scale_width = 1;
 398     float f_scale_height = 1;
 399
 400     /* aspect ratio */
 401     float f_aspect = (double)p_fmt_out->video.i_sar_num *
 402                      p_fmt_out->video.i_width /
 403                      p_fmt_out->video.i_sar_den /
 404                      p_fmt_out->video.i_height;
 405
 406     msg_Dbg( p_stream, "decoder aspect is %f:1", f_aspect );
 407
 408     /* Change f_aspect from source frame to source pixel */
 409     f_aspect = f_aspect * i_src_visible_height / i_src_visible_width;
 410     msg_Dbg( p_stream, "source pixel aspect is %f:1", f_aspect );
 411
 412     /* Calculate scaling factor for specified parameters */
 413     if( id->p_encoder->fmt_out.video.i_width <= 0 &&
 414         id->p_encoder->fmt_out.video.i_height <= 0 && p_sys->f_scale )
 415     {
 416         /* Global scaling. Make sure width will remain a factor of 16 */
 417         float f_real_scale;
 418         int  i_new_height;
 419         int i_new_width = i_src_visible_width * p_sys->f_scale;
 420
 421         if( i_new_width % 16 <= 7 && i_new_width >= 16 )
 422             i_new_width -= i_new_width % 16;
 423         else
 424             i_new_width += 16 - i_new_width % 16;
 425
 426         f_real_scale = (float)( i_new_width ) / (float) i_src_visible_width;
 427
 428         i_new_height = __MAX( 16, i_src_visible_height * (float)f_real_scale );
 429
 430         f_scale_width = f_real_scale;
 431         f_scale_height = (float) i_new_height / (float) i_src_visible_height;
 432     }
 433     else if( id->p_encoder->fmt_out.video.i_width > 0 &&
 434              id->p_encoder->fmt_out.video.i_height <= 0 )
 435     {
 436         /* Only width specified */
 437         f_scale_width = (float)id->p_encoder->fmt_out.video.i_width/i_src_visible_width;
 438         f_scale_height = f_scale_width;
 439     }
 440     else if( id->p_encoder->fmt_out.video.i_width <= 0 &&
 441              id->p_encoder->fmt_out.video.i_height > 0 )
 442     {
 443          /* Only height specified */
 444          f_scale_height = (float)id->p_encoder->fmt_out.video.i_height/i_src_visible_height;
 445          f_scale_width = f_scale_height;
 446      }
 447      else if( id->p_encoder->fmt_out.video.i_width > 0 &&
 448               id->p_encoder->fmt_out.video.i_height > 0 )
 449      {
 450          /* Width and height specified */
 451          f_scale_width = (float)id->p_encoder->fmt_out.video.i_width/i_src_visible_width;
 452          f_scale_height = (float)id->p_encoder->fmt_out.video.i_height/i_src_visible_height;
 453      }
 454
 455      /* check maxwidth and maxheight */
 456      if( p_sys->i_maxwidth && f_scale_width > (float)p_sys->i_maxwidth /
 457                                                      i_src_visible_width )
 458      {
 459          f_scale_width = (float)p_sys->i_maxwidth / i_src_visible_width;
 460      }
 461
 462      if( p_sys->i_maxheight && f_scale_height > (float)p_sys->i_maxheight /
 463                                                        i_src_visible_height )
 464      {
 465          f_scale_height = (float)p_sys->i_maxheight / i_src_visible_height;
 466      }
 467
 468
 469      /* Change aspect ratio from source pixel to scaled pixel */
 470      f_aspect = f_aspect * f_scale_height / f_scale_width;
 471      msg_Dbg( p_stream, "scaled pixel aspect is %f:1", f_aspect );
 472
 473      /* f_scale_width and f_scale_height are now final */
 474      /* Calculate width, height from scaling
 475       * Make sure its multiple of 2
 476       */
 477      /* width/height of output stream */
 478      int i_dst_visible_width =  2 * (int)(f_scale_width*i_src_visible_width/2+0.5);
 479      int i_dst_visible_height = 2 * (int)(f_scale_height*i_src_visible_height/2+0.5);
 480      int i_dst_width =  2 * (int)(f_scale_width*p_fmt_out->video.i_width/2+0.5);
 481      int i_dst_height = 2 * (int)(f_scale_height*p_fmt_out->video.i_height/2+0.5);
 482
 483      /* Change aspect ratio from scaled pixel to output frame */
 484      f_aspect = f_aspect * i_dst_visible_width / i_dst_visible_height;
 485
 486      /* Store calculated values */
 487      id->p_encoder->fmt_out.video.i_width = i_dst_width;
 488      id->p_encoder->fmt_out.video.i_visible_width = i_dst_visible_width;
 489      id->p_encoder->fmt_out.video.i_height = i_dst_height;
 490      id->p_encoder->fmt_out.video.i_visible_height = i_dst_visible_height;
 491
 492      id->p_encoder->fmt_in.video.i_width = i_dst_width;
 493      id->p_encoder->fmt_in.video.i_visible_width = i_dst_visible_width;
 494      id->p_encoder->fmt_in.video.i_height = i_dst_height;
 495      id->p_encoder->fmt_in.video.i_visible_height = i_dst_visible_height;
 496
 497      msg_Dbg( p_stream, "source %ix%i, destination %ix%i",
 498          i_src_visible_width, i_src_visible_height,
 499          i_dst_visible_width, i_dst_visible_height
 500      );
 501
 502     /* Handle frame rate conversion */
 503     if( !id->p_encoder->fmt_out.video.i_frame_rate ||
 504         !id->p_encoder->fmt_out.video.i_frame_rate_base )
 505     {
 506         if( p_fmt_out->video.i_frame_rate &&
 507             p_fmt_out->video.i_frame_rate_base )
 508         {
 509             id->p_encoder->fmt_out.video.i_frame_rate =
 510                 p_fmt_out->video.i_frame_rate;
 511             id->p_encoder->fmt_out.video.i_frame_rate_base =
 512                 p_fmt_out->video.i_frame_rate_base;
 513         }
 514         else
 515         {
 516             /* Pick a sensible default value */
 517             id->p_encoder->fmt_out.video.i_frame_rate = ENC_FRAMERATE;
 518             id->p_encoder->fmt_out.video.i_frame_rate_base = ENC_FRAMERATE_BASE;
 519         }
 520     }
 521
 522     id->p_encoder->fmt_in.video.i_frame_rate =
 523         id->p_encoder->fmt_out.video.i_frame_rate;
 524     id->p_encoder->fmt_in.video.i_frame_rate_base =
 525         id->p_encoder->fmt_out.video.i_frame_rate_base;
 526
 527     vlc_ureduce( &id->p_encoder->fmt_in.video.i_frame_rate,
 528         &id->p_encoder->fmt_in.video.i_frame_rate_base,
 529         id->p_encoder->fmt_in.video.i_frame_rate,
 530         id->p_encoder->fmt_in.video.i_frame_rate_base,
 531         0 );
 532      msg_Dbg( p_stream, "source fps %d/%d, destination %d/%d",
 533         id->p_decoder->fmt_out.video.i_frame_rate,
 534         id->p_decoder->fmt_out.video.i_frame_rate_base,
 535         id->p_encoder->fmt_in.video.i_frame_rate,
 536         id->p_encoder->fmt_in.video.i_frame_rate_base );
 537
 538     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;
 539     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;
 540     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,
 541                         id->i_output_frame_interval, id->p_encoder->fmt_in.video.i_frame_rate_base );
 542
 543     date_Init( &id->interpolated_pts,
 544                id->p_decoder->fmt_out.video.i_frame_rate,
 545                1 );
 546     date_Init( &id->next_output_pts,
 547                id->p_encoder->fmt_in.video.i_frame_rate,
 548                1 );
 549
 550     /* Check whether a particular aspect ratio was requested */
 551     if( id->p_encoder->fmt_out.video.i_sar_num <= 0 ||
 552         id->p_encoder->fmt_out.video.i_sar_den <= 0 )
 553     {
 554         vlc_ureduce( &id->p_encoder->fmt_out.video.i_sar_num,
 555                      &id->p_encoder->fmt_out.video.i_sar_den,
 556                      (uint64_t)p_fmt_out->video.i_sar_num * i_src_visible_width  * i_dst_visible_height,
 557                      (uint64_t)p_fmt_out->video.i_sar_den * i_src_visible_height * i_dst_visible_width,
 558                      0 );
 559     }
 560     else
 561     {
 562         vlc_ureduce( &id->p_encoder->fmt_out.video.i_sar_num,
 563                      &id->p_encoder->fmt_out.video.i_sar_den,
 564                      id->p_encoder->fmt_out.video.i_sar_num,
 565                      id->p_encoder->fmt_out.video.i_sar_den,
 566                      0 );
 567     }
 568
 569     id->p_encoder->fmt_in.video.i_sar_num =
 570         id->p_encoder->fmt_out.video.i_sar_num;
 571     id->p_encoder->fmt_in.video.i_sar_den =
 572         id->p_encoder->fmt_out.video.i_sar_den;
 573
 574     msg_Dbg( p_stream, "encoder aspect is %i:%i",
 575              id->p_encoder->fmt_out.video.i_sar_num * id->p_encoder->fmt_out.video.i_width,
 576              id->p_encoder->fmt_out.video.i_sar_den * id->p_encoder->fmt_out.video.i_height );
 577
 578 }
 579
 580 static int transcode_video_encoder_open( sout_stream_t *p_stream,
 581                                          sout_stream_id_t *id )
 582 {
 583     sout_stream_sys_t *p_sys = p_stream->p_sys;
 584
 585
 586     msg_Dbg( p_stream, "destination (after video filters) %ix%i",
 587              id->p_encoder->fmt_in.video.i_width,
 588              id->p_encoder->fmt_in.video.i_height );
 589
 590     id->p_encoder->p_module =
 591         module_need( id->p_encoder, "encoder", p_sys->psz_venc, true );
 592     if( !id->p_encoder->p_module )
 593     {
 594         msg_Err( p_stream, "cannot find video encoder (module:%s fourcc:%4.4s)",
 595                  p_sys->psz_venc ? p_sys->psz_venc : "any",
 596                  (char *)&p_sys->i_vcodec );
 597         return VLC_EGENERIC;
 598     }
 599
 600     id->p_encoder->fmt_in.video.i_chroma = id->p_encoder->fmt_in.i_codec;
 601
 602     /*  */
 603     id->p_encoder->fmt_out.i_codec =
 604         vlc_fourcc_GetCodec( VIDEO_ES, id->p_encoder->fmt_out.i_codec );
 605
 606     id->id = sout_StreamIdAdd( p_stream->p_next, &id->p_encoder->fmt_out );
 607     if( !id->id )
 608     {
 609         msg_Err( p_stream, "cannot add this stream" );
 610         return VLC_EGENERIC;
 611     }
 612
 613     return VLC_SUCCESS;
 614 }
 615
 616 void transcode_video_close( sout_stream_t *p_stream,
 617                                    sout_stream_id_t *id )
 618 {
 619     if( p_stream->p_sys->i_threads >= 1 )
 620     {
 621         vlc_mutex_lock( &p_stream->p_sys->lock_out );
 622         p_stream->p_sys->b_abort = true;
 623         vlc_cond_signal( &p_stream->p_sys->cond );
 624         vlc_mutex_unlock( &p_stream->p_sys->lock_out );
 625
 626         vlc_join( p_stream->p_sys->thread, NULL );
 627         vlc_mutex_destroy( &p_stream->p_sys->lock_out );
 628         vlc_cond_destroy( &p_stream->p_sys->cond );
 629
 630         picture_fifo_Delete( p_stream->p_sys->pp_pics );
 631         block_ChainRelease( p_stream->p_sys->p_buffers );
 632         p_stream->p_sys->pp_pics = NULL;
 633     }
 634
 635     /* Close decoder */
 636     if( id->p_decoder->p_module )
 637         module_unneed( id->p_decoder, id->p_decoder->p_module );
 638     if( id->p_decoder->p_description )
 639         vlc_meta_Delete( id->p_decoder->p_description );
 640
 641     free( id->p_decoder->p_owner );
 642
 643     /* Close encoder */
 644     if( id->p_encoder->p_module )
 645         module_unneed( id->p_encoder, id->p_encoder->p_module );
 646
 647     /* Close filters */
 648     if( id->p_f_chain )
 649         filter_chain_Delete( id->p_f_chain );
 650     if( id->p_uf_chain )
 651         filter_chain_Delete( id->p_uf_chain );
 652 }
 653
 654 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 )
 655 {
 656
 657     picture_t *p_pic2 = NULL;
 658     bool b_need_duplicate=false;
 659     /* If input pts + input_frame_interval is lower than next_output_pts - output_frame_interval
 660      * Then the future input frame should fit better and we can drop this one
 661      *
 662      * Duplication need is checked in OutputFrame */
 663     if( ( p_pic->date + (mtime_t)id->i_input_frame_interval ) <
 664         ( date_Get( &id->next_output_pts ) ) )
 665     {
 666 #if 0
 667         msg_Dbg( p_stream, "dropping frame (%"PRId64" + %"PRId64" vs %"PRId64")",
 668                  p_pic->date, id->i_input_frame_interval, date_Get(&id->next_output_pts) );
 669 #endif
 670         picture_Release( p_pic );
 671         return;
 672     }
 673
 674     /*
 675      * Encoding
 676      */
 677     /* Check if we have a subpicture to overlay */
 678     if( p_sys->p_spu )
 679     {
 680         video_format_t fmt = id->p_encoder->fmt_in.video;
 681         if( fmt.i_visible_width <= 0 || fmt.i_visible_height <= 0 )
 682         {
 683             fmt.i_visible_width  = fmt.i_width;
 684             fmt.i_visible_height = fmt.i_height;
 685             fmt.i_x_offset       = 0;
 686             fmt.i_y_offset       = 0;
 687         }
 688
 689         subpicture_t *p_subpic = spu_Render( p_sys->p_spu, NULL, &fmt, &fmt,
 690                                              p_pic->date, p_pic->date, false );
 691
 692         /* Overlay subpicture */
 693         if( p_subpic )
 694         {
 695             if( picture_IsReferenced( p_pic ) && !filter_chain_GetLength( id->p_f_chain ) )
 696             {
 697                 /* We can't modify the picture, we need to duplicate it,
 698                  * in this point the picture is already p_encoder->fmt.in format*/
 699                 picture_t *p_tmp = video_new_buffer_encoder( id->p_encoder );
 700                 if( likely( p_tmp ) )
 701                 {
 702                     picture_Copy( p_tmp, p_pic );
 703                     picture_Release( p_pic );
 704                     p_pic = p_tmp;
 705                 }
 706             }
 707             if( unlikely( !p_sys->p_spu_blend ) )
 708                 p_sys->p_spu_blend = filter_NewBlend( VLC_OBJECT( p_sys->p_spu ), &fmt );
 709             if( likely( p_sys->p_spu_blend ) )
 710                 picture_BlendSubpicture( p_pic, p_sys->p_spu_blend, p_subpic );
 711             subpicture_Delete( p_subpic );
 712         }
 713     }
 714     /*This pts is handled, increase clock to next one*/
 715     date_Increment( &id->next_output_pts, id->p_encoder->fmt_in.video.i_frame_rate_base );
 716
 717     if( p_sys->i_threads == 0 )
 718     {
 719         block_t *p_block;
 720
 721         p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
 722         block_ChainAppend( out, p_block );
 723     }
 724
 725     /* we need to duplicate while next_output_pts + output_frame_interval < input_pts (next input pts)*/
 726     b_need_duplicate = ( date_Get( &id->next_output_pts ) + id->i_output_frame_interval ) <
 727                        ( date_Get( &id->interpolated_pts ) );
 728
 729     if( p_sys->i_threads )
 730     {
 731         if( p_sys->b_master_sync )
 732         {
 733             p_pic2 = video_new_buffer_encoder( id->p_encoder );
 734             if( likely( p_pic2 != NULL ) )
 735                 picture_Copy( p_pic2, p_pic );
 736         }
 737         vlc_mutex_lock( &p_sys->lock_out );
 738         picture_fifo_Push( p_sys->pp_pics, p_pic );
 739         vlc_cond_signal( &p_sys->cond );
 740         vlc_mutex_unlock( &p_sys->lock_out );
 741     }
 742
 743     while( (p_sys->b_master_sync && b_need_duplicate ))
 744     {
 745         if( p_sys->i_threads >= 1 )
 746         {
 747             picture_t *p_tmp = NULL;
 748             /* We can't modify the picture, we need to duplicate it */
 749             p_tmp = video_new_buffer_encoder( id->p_encoder );
 750             if( likely( p_tmp != NULL ) )
 751             {
 752                 picture_Copy( p_tmp, p_pic2 );
 753                 p_tmp->date = date_Get( &id->next_output_pts );
 754                 vlc_mutex_lock( &p_sys->lock_out );
 755                 picture_fifo_Push( p_sys->pp_pics, p_tmp );
 756                 vlc_cond_signal( &p_sys->cond );
 757                 vlc_mutex_unlock( &p_sys->lock_out );
 758             }
 759         }
 760         else
 761         {
 762             block_t *p_block;
 763             p_pic->date = date_Get( &id->next_output_pts );
 764             p_block = id->p_encoder->pf_encode_video(id->p_encoder, p_pic);
 765             block_ChainAppend( out, p_block );
 766         }
 767 #if 0
 768         msg_Dbg( p_stream, "duplicated frame");
 769 #endif
 770         date_Increment( &id->next_output_pts, id->p_encoder->fmt_in.video.i_frame_rate_base );
 771         b_need_duplicate = ( date_Get( &id->next_output_pts ) + id->i_output_frame_interval ) <
 772                            ( date_Get( &id->interpolated_pts ) );
 773     }
 774
 775     if( p_sys->i_threads && p_pic2 )
 776         picture_Release( p_pic2 );
 777     else if ( p_sys->i_threads == 0 )
 778         picture_Release( p_pic );
 779 }
 780
 781 int transcode_video_process( sout_stream_t *p_stream, sout_stream_id_t *id,
 782                                     block_t *in, block_t **out )
 783 {
 784     sout_stream_sys_t *p_sys = p_stream->p_sys;
 785     picture_t *p_pic = NULL;
 786     *out = NULL;
 787
 788     if( unlikely( in == NULL ) )
 789     {
 790         if( p_sys->i_threads == 0 )
 791         {
 792             block_t *p_block;
 793             do {
 794                 p_block = id->p_encoder->pf_encode_video(id->p_encoder, NULL );
 795                 block_ChainAppend( out, p_block );
 796             } while( p_block );
 797         }
 798         else
 799         {
 800             msg_Dbg( p_stream, "Flushing thread and waiting that");
 801             vlc_mutex_lock( &p_stream->p_sys->lock_out );
 802             p_stream->p_sys->b_abort = true;
 803             vlc_cond_signal( &p_stream->p_sys->cond );
 804             vlc_mutex_unlock( &p_stream->p_sys->lock_out );
 805
 806             vlc_join( p_stream->p_sys->thread, NULL );
 807             vlc_mutex_lock( &p_sys->lock_out );
 808             *out = p_sys->p_buffers;
 809             p_sys->p_buffers = NULL;
 810             vlc_mutex_unlock( &p_sys->lock_out );
 811
 812             msg_Dbg( p_stream, "Flushing done");
 813         }
 814         return VLC_SUCCESS;
 815     }
 816
 817
 818     while( (p_pic = id->p_decoder->pf_decode_video( id->p_decoder, &in )) )
 819     {
 820
 821         if( p_stream->p_sout->i_out_pace_nocontrol && p_sys->b_hurry_up )
 822         {
 823             mtime_t current_date = mdate();
 824             if( unlikely( (current_date - 50000) > p_pic->date ) )
 825             {
 826                 msg_Dbg( p_stream, "late picture skipped (%"PRId64")",
 827                          current_date - 50000 - p_pic->date );
 828                 picture_Release( p_pic );
 829                 continue;
 830             }
 831         }
 832
 833         if( unlikely (
 834              id->p_encoder->p_module &&
 835              !video_format_IsSimilar( &p_sys->fmt_input_video, &id->p_decoder->fmt_out.video )
 836             )
 837           )
 838         {
 839             msg_Info( p_stream, "aspect-ratio changed, reiniting. %i -> %i : %i -> %i.",
 840                         p_sys->fmt_input_video.i_sar_num, id->p_decoder->fmt_out.video.i_sar_num,
 841                         p_sys->fmt_input_video.i_sar_den, id->p_decoder->fmt_out.video.i_sar_den
 842                     );
 843             /* Close filters */
 844             if( id->p_f_chain )
 845                 filter_chain_Delete( id->p_f_chain );
 846             id->p_f_chain = NULL;
 847             if( id->p_uf_chain )
 848                 filter_chain_Delete( id->p_uf_chain );
 849             id->p_uf_chain = NULL;
 850
 851             /* Reinitialize filters */
 852             id->p_encoder->fmt_out.video.i_width  = p_sys->i_width & ~1;
 853             id->p_encoder->fmt_out.video.i_height = p_sys->i_height & ~1;
 854             id->p_encoder->fmt_out.video.i_sar_num = id->p_encoder->fmt_out.video.i_sar_den = 0;
 855
 856             transcode_video_filter_init( p_stream, id );
 857             transcode_video_encoder_init( p_stream, id );
 858             conversion_video_filter_append( id );
 859             memcpy( &p_sys->fmt_input_video, &id->p_decoder->fmt_out.video, sizeof(video_format_t));
 860         }
 861
 862
 863         if( unlikely( !id->p_encoder->p_module ) )
 864         {
 865             if( id->p_f_chain )
 866                 filter_chain_Delete( id->p_f_chain );
 867             if( id->p_uf_chain )
 868                 filter_chain_Delete( id->p_uf_chain );
 869             id->p_f_chain = id->p_uf_chain = NULL;
 870
 871             transcode_video_filter_init( p_stream, id );
 872             transcode_video_encoder_init( p_stream, id );
 873             conversion_video_filter_append( id );
 874             memcpy( &p_sys->fmt_input_video, &id->p_decoder->fmt_out.video, sizeof(video_format_t));
 875
 876             if( transcode_video_encoder_open( p_stream, id ) != VLC_SUCCESS )
 877             {
 878                 picture_Release( p_pic );
 879                 transcode_video_close( p_stream, id );
 880                 id->b_transcode = false;
 881                 return VLC_EGENERIC;
 882             }
 883         }
 884
 885         /*Input lipsync and drop check */
 886         if( p_sys->b_master_sync )
 887         {
 888             /* How much audio has drifted */
 889             mtime_t i_master_drift = p_sys->i_master_drift;
 890
 891             /* This is the pts input should have now with constant frame rate */
 892             mtime_t i_pts = date_Get( &id->interpolated_pts );
 893
 894             /* How much input pts has drifted */
 895             mtime_t i_video_drift = p_pic->date - i_pts;
 896
 897             /* Check that we are having lipsync with input here */
 898             if( unlikely ( ( (i_video_drift - i_master_drift ) > MASTER_SYNC_MAX_DRIFT
 899                           || (i_video_drift + i_master_drift ) < -MASTER_SYNC_MAX_DRIFT ) ) )
 900             {
 901                 msg_Warn( p_stream,
 902                     "video drift too big, resetting sync %"PRId64" to %"PRId64,
 903                     (i_video_drift + i_master_drift),
 904                     p_pic->date
 905                     );
 906                 date_Set( &id->interpolated_pts, p_pic->date );
 907                 date_Set( &id->next_output_pts, p_pic->date );
 908                 i_pts = date_Get( &id->interpolated_pts );
 909             }
 910
 911             /* Set the pts of the frame being encoded */
 912             p_pic->date = i_pts;
 913
 914             /* now take next input pts, pts dates are only enabled if p_module is set*/
 915             date_Increment( &id->interpolated_pts, id->p_decoder->fmt_out.video.i_frame_rate_base );
 916
 917
 918             /* If input pts + input_frame_interval is lower than next_output_pts - output_frame_interval
 919              * Then the future input frame should fit better and we can drop this one
 920              *
 921              * Duplication need is checked in OutputFrame */
 922             if( ( p_pic->date + (mtime_t)id->i_input_frame_interval ) <
 923                 ( date_Get( &id->next_output_pts ) ) )
 924             {
 925 #if 0
 926                 msg_Dbg( p_stream, "dropping frame (%"PRId64" + %"PRId64" vs %"PRId64")",
 927                          p_pic->date, id->i_input_frame_interval, date_Get(&id->next_output_pts) );
 928 #endif
 929                 picture_Release( p_pic );
 930                 continue;
 931             }
 932 #if 0
 933             msg_Dbg( p_stream, "not dropping frame");
 934 #endif
 935
 936             /* input calculated pts isn't necessary what pts output should be, so use output pts*/
 937             p_pic->date = date_Get( &id->next_output_pts );
 938
 939
 940         }
 941
 942         /* Run the filter and output chains; first with the picture,
 943          * and then with NULL as many times as we need until they
 944          * stop outputting frames.
 945          */
 946         for ( ;; ) {
 947             picture_t *p_filtered_pic = p_pic;
 948
 949             /* Run filter chain */
 950             if( id->p_f_chain )
 951                 p_filtered_pic = filter_chain_VideoFilter( id->p_f_chain, p_filtered_pic );
 952             if( !p_filtered_pic )
 953                 break;
 954
 955             for ( ;; ) {
 956                 picture_t *p_user_filtered_pic = p_filtered_pic;
 957
 958                 /* Run user specified filter chain */
 959                 if( id->p_uf_chain )
 960                     p_user_filtered_pic = filter_chain_VideoFilter( id->p_uf_chain, p_user_filtered_pic );
 961                 if( !p_user_filtered_pic )
 962                     break;
 963
 964                 OutputFrame( p_sys, p_user_filtered_pic, p_stream, id, out );
 965
 966                 p_filtered_pic = NULL;
 967             }
 968
 969             p_pic = NULL;
 970         }
 971     }
 972
 973     if( p_sys->i_threads >= 1 )
 974     {
 975         /* Pick up any return data the encoder thread wants to output. */
 976         vlc_mutex_lock( &p_sys->lock_out );
 977         *out = p_sys->p_buffers;
 978         p_sys->p_buffers = NULL;
 979         vlc_mutex_unlock( &p_sys->lock_out );
 980     }
 981
 982     return VLC_SUCCESS;
 983 }
 984
 985 bool transcode_video_add( sout_stream_t *p_stream, es_format_t *p_fmt,
 986                                 sout_stream_id_t *id )
 987 {
 988     sout_stream_sys_t *p_sys = p_stream->p_sys;
 989
 990     msg_Dbg( p_stream,
 991              "creating video transcoding from fcc=`%4.4s' to fcc=`%4.4s'",
 992              (char*)&p_fmt->i_codec, (char*)&p_sys->i_vcodec );
 993
 994     /* Complete destination format */
 995     id->p_encoder->fmt_out.i_codec = p_sys->i_vcodec;
 996     id->p_encoder->fmt_out.video.i_width  = p_sys->i_width & ~1;
 997     id->p_encoder->fmt_out.video.i_height = p_sys->i_height & ~1;
 998     id->p_encoder->fmt_out.i_bitrate = p_sys->i_vbitrate;
 999
1000     /* Build decoder -> filter -> encoder chain */
1001     if( transcode_video_new( p_stream, id ) )
1002     {
1003         msg_Err( p_stream, "cannot create video chain" );
1004         return false;
1005     }
1006
1007     /* Stream will be added later on because we don't know
1008      * all the characteristics of the decoded stream yet */
1009     id->b_transcode = true;
1010
1011     if( p_sys->f_fps > 0 )
1012     {
1013         id->p_encoder->fmt_out.video.i_frame_rate = (p_sys->f_fps * ENC_FRAMERATE_BASE);
1014         id->p_encoder->fmt_out.video.i_frame_rate_base = ENC_FRAMERATE_BASE;
1015     }
1016
1017     return true;
1018 }
1019