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 <math.h>
  34 #include <vlc_meta.h>
  35 #include <vlc_spu.h>
  36 #include <vlc_modules.h>
  37
  38 #define ENC_FRAMERATE (25 * 1000)
  39 #define ENC_FRAMERATE_BASE 1000
  40
  41 struct decoder_owner_sys_t
  42 {
  43     sout_stream_sys_t *p_sys;
  44 };
  45
  46 static int video_update_format_decoder( decoder_t *p_dec )
  47 {
  48     p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
  49     return 0;
  50 }
  51
  52 static picture_t *video_new_buffer_decoder( decoder_t *p_dec )
  53 {
  54     return picture_NewFromFormat( &p_dec->fmt_out.video );
  55 }
  56
  57 static picture_t *video_new_buffer_encoder( encoder_t *p_enc )
  58 {
  59     p_enc->fmt_in.video.i_chroma = p_enc->fmt_in.i_codec;
  60     return picture_NewFromFormat( &p_enc->fmt_in.video );
  61 }
  62
  63 static picture_t *transcode_video_filter_buffer_new( filter_t *p_filter )
  64 {
  65     p_filter->fmt_out.video.i_chroma = p_filter->fmt_out.i_codec;
  66     return picture_NewFromFormat( &p_filter->fmt_out.video );
  67 }
  68
  69 static void* EncoderThread( void *obj )
  70 {
  71     sout_stream_sys_t *p_sys = (sout_stream_sys_t*)obj;
  72     sout_stream_id_sys_t *id = p_sys->id_video;
  73     picture_t *p_pic = NULL;
  74     int canc = vlc_savecancel ();
  75     block_t *p_block = NULL;
  76
  77     vlc_mutex_lock( &p_sys->lock_out );
  78
  79     for( ;; )
  80     {
  81         while( !p_sys->b_abort &&
  82                (p_pic = picture_fifo_Pop( p_sys->pp_pics )) == NULL )
  83             vlc_cond_wait( &p_sys->cond, &p_sys->lock_out );
  84
  85         if( p_pic )
  86         {
  87             /* release lock while encoding */
  88             vlc_mutex_unlock( &p_sys->lock_out );
  89             p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
  90             picture_Release( p_pic );
  91             vlc_mutex_lock( &p_sys->lock_out );
  92
  93             block_ChainAppend( &p_sys->p_buffers, p_block );
  94         }
  95
  96         if( p_sys->b_abort )
  97             break;
  98     }
  99
 100     /*Encode what we have in the buffer on closing*/
 101     while( (p_pic = picture_fifo_Pop( p_sys->pp_pics )) != NULL )
 102     {
 103         p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
 104         picture_Release( p_pic );
 105         block_ChainAppend( &p_sys->p_buffers, p_block );
 106     }
 107
 108     /*Now flush encoder*/
 109     do {
 110         p_block = id->p_encoder->pf_encode_video(id->p_encoder, NULL );
 111         block_ChainAppend( &p_sys->p_buffers, p_block );
 112     } while( p_block );
 113
 114     vlc_mutex_unlock( &p_sys->lock_out );
 115
 116     vlc_restorecancel (canc);
 117
 118     return NULL;
 119 }
 120
 121 int transcode_video_new( sout_stream_t *p_stream, sout_stream_id_sys_t *id )
 122 {
 123     sout_stream_sys_t *p_sys = p_stream->p_sys;
 124
 125     /* Open decoder
 126      * Initialization of decoder structures
 127      */
 128     id->p_decoder->fmt_out = id->p_decoder->fmt_in;
 129     id->p_decoder->fmt_out.i_extra = 0;
 130     id->p_decoder->fmt_out.p_extra = 0;
 131     id->p_decoder->pf_decode_video = NULL;
 132     id->p_decoder->pf_get_cc = NULL;
 133     id->p_decoder->pf_get_cc = 0;
 134     id->p_decoder->pf_vout_format_update = video_update_format_decoder;
 135     id->p_decoder->pf_vout_buffer_new = video_new_buffer_decoder;
 136     id->p_decoder->p_owner = malloc( sizeof(decoder_owner_sys_t) );
 137     if( !id->p_decoder->p_owner )
 138         return VLC_EGENERIC;
 139
 140     id->p_decoder->p_owner->p_sys = p_sys;
 141     /* id->p_decoder->p_cfg = p_sys->p_video_cfg; */
 142
 143     id->p_decoder->p_module =
 144         module_need( id->p_decoder, "decoder", "$codec", false );
 145
 146     if( !id->p_decoder->p_module )
 147     {
 148         msg_Err( p_stream, "cannot find video decoder" );
 149         free( id->p_decoder->p_owner );
 150         return VLC_EGENERIC;
 151     }
 152
 153     /*
 154      * Open encoder.
 155      * Because some info about the decoded input will only be available
 156      * once the first frame is decoded, we actually only test the availability
 157      * of the encoder here.
 158      */
 159
 160     /* Initialization of encoder format structures */
 161     es_format_Init( &id->p_encoder->fmt_in, id->p_decoder->fmt_in.i_cat,
 162                     id->p_decoder->fmt_out.i_codec );
 163     id->p_encoder->fmt_in.video.i_chroma = id->p_decoder->fmt_out.i_codec;
 164
 165     /* The dimensions will be set properly later on.
 166      * Just put sensible values so we can test an encoder is available. */
 167     id->p_encoder->fmt_in.video.i_width =
 168         id->p_encoder->fmt_out.video.i_width
 169           ? id->p_encoder->fmt_out.video.i_width
 170           : id->p_decoder->fmt_in.video.i_width
 171             ? id->p_decoder->fmt_in.video.i_width : 16;
 172     id->p_encoder->fmt_in.video.i_height =
 173         id->p_encoder->fmt_out.video.i_height
 174           ? id->p_encoder->fmt_out.video.i_height
 175           : id->p_decoder->fmt_in.video.i_height
 176             ? id->p_decoder->fmt_in.video.i_height : 16;
 177     id->p_encoder->fmt_in.video.i_visible_width =
 178         id->p_encoder->fmt_out.video.i_visible_width
 179           ? id->p_encoder->fmt_out.video.i_visible_width
 180           : id->p_decoder->fmt_in.video.i_visible_width
 181             ? id->p_decoder->fmt_in.video.i_visible_width : id->p_encoder->fmt_in.video.i_width;
 182     id->p_encoder->fmt_in.video.i_visible_height =
 183         id->p_encoder->fmt_out.video.i_visible_height
 184           ? id->p_encoder->fmt_out.video.i_visible_height
 185           : id->p_decoder->fmt_in.video.i_visible_height
 186             ? id->p_decoder->fmt_in.video.i_visible_height : id->p_encoder->fmt_in.video.i_height;
 187
 188     id->p_encoder->i_threads = p_sys->i_threads;
 189     id->p_encoder->p_cfg = p_sys->p_video_cfg;
 190
 191     id->p_encoder->p_module =
 192         module_need( id->p_encoder, "encoder", p_sys->psz_venc, true );
 193     if( !id->p_encoder->p_module )
 194     {
 195         msg_Err( p_stream, "cannot find video encoder (module:%s fourcc:%4.4s). Take a look few lines earlier to see possible reason.",
 196                  p_sys->psz_venc ? p_sys->psz_venc : "any",
 197                  (char *)&p_sys->i_vcodec );
 198         module_unneed( id->p_decoder, id->p_decoder->p_module );
 199         id->p_decoder->p_module = 0;
 200         free( id->p_decoder->p_owner );
 201         return VLC_EGENERIC;
 202     }
 203
 204     /* Close the encoder.
 205      * We'll open it only when we have the first frame. */
 206     module_unneed( id->p_encoder, id->p_encoder->p_module );
 207     if( id->p_encoder->fmt_out.p_extra )
 208     {
 209         free( id->p_encoder->fmt_out.p_extra );
 210         id->p_encoder->fmt_out.p_extra = NULL;
 211         id->p_encoder->fmt_out.i_extra = 0;
 212     }
 213     id->p_encoder->p_module = NULL;
 214
 215     if( p_sys->i_threads <= 0 )
 216         return VLC_SUCCESS;
 217
 218     int i_priority = p_sys->b_high_priority ? VLC_THREAD_PRIORITY_OUTPUT :
 219                        VLC_THREAD_PRIORITY_VIDEO;
 220     p_sys->id_video = id;
 221     p_sys->pp_pics = picture_fifo_New();
 222     if( p_sys->pp_pics == NULL )
 223     {
 224         msg_Err( p_stream, "cannot create picture fifo" );
 225         module_unneed( id->p_decoder, id->p_decoder->p_module );
 226         id->p_decoder->p_module = NULL;
 227         free( id->p_decoder->p_owner );
 228         return VLC_ENOMEM;
 229     }
 230     vlc_mutex_init( &p_sys->lock_out );
 231     vlc_cond_init( &p_sys->cond );
 232     p_sys->p_buffers = NULL;
 233     p_sys->b_abort = false;
 234     if( vlc_clone( &p_sys->thread, EncoderThread, p_sys, i_priority ) )
 235     {
 236         msg_Err( p_stream, "cannot spawn encoder thread" );
 237         vlc_mutex_destroy( &p_sys->lock_out );
 238         vlc_cond_destroy( &p_sys->cond );
 239         picture_fifo_Delete( p_sys->pp_pics );
 240         module_unneed( id->p_decoder, id->p_decoder->p_module );
 241         id->p_decoder->p_module = NULL;
 242         free( id->p_decoder->p_owner );
 243         return VLC_EGENERIC;
 244     }
 245     return VLC_SUCCESS;
 246 }
 247
 248 static void transcode_video_filter_init( sout_stream_t *p_stream,
 249                                          sout_stream_id_sys_t *id )
 250 {
 251     filter_owner_t owner = {
 252         .sys = p_stream->p_sys,
 253         .video = {
 254             .buffer_new = transcode_video_filter_buffer_new,
 255         },
 256     };
 257     es_format_t *p_fmt_out = &id->p_decoder->fmt_out;
 258
 259     id->p_encoder->fmt_in.video.i_chroma = id->p_encoder->fmt_in.i_codec;
 260     id->p_f_chain = filter_chain_NewVideo( p_stream, false, &owner );
 261     filter_chain_Reset( id->p_f_chain, p_fmt_out, p_fmt_out );
 262
 263     /* Deinterlace */
 264     if( p_stream->p_sys->b_deinterlace )
 265     {
 266         filter_chain_AppendFilter( id->p_f_chain,
 267                                    p_stream->p_sys->psz_deinterlace,
 268                                    p_stream->p_sys->p_deinterlace_cfg,
 269                                    &id->p_decoder->fmt_out,
 270                                    &id->p_decoder->fmt_out );
 271
 272         p_fmt_out = filter_chain_GetFmtOut( id->p_f_chain );
 273     }
 274     if( p_stream->p_sys->b_master_sync )
 275     {
 276         filter_chain_AppendFilter( id->p_f_chain,
 277                                    "fps",
 278                                    NULL,
 279                                    p_fmt_out,
 280                                    &id->p_encoder->fmt_in );
 281
 282         p_fmt_out = filter_chain_GetFmtOut( id->p_f_chain );
 283     }
 284
 285     /* Check that we have visible_width/height*/
 286     if( !p_fmt_out->video.i_visible_height )
 287         p_fmt_out->video.i_visible_height = p_fmt_out->video.i_height;
 288     if( !p_fmt_out->video.i_visible_width )
 289         p_fmt_out->video.i_visible_width = p_fmt_out->video.i_width;
 290
 291     if( p_stream->p_sys->psz_vf2 )
 292     {
 293         id->p_uf_chain = filter_chain_NewVideo( p_stream, true, &owner );
 294         filter_chain_Reset( id->p_uf_chain, p_fmt_out,
 295                             &id->p_encoder->fmt_in );
 296         if( p_fmt_out->video.i_chroma != id->p_encoder->fmt_in.video.i_chroma )
 297         {
 298             filter_chain_AppendFilter( id->p_uf_chain,
 299                                    NULL, NULL,
 300                                    p_fmt_out,
 301                                    &id->p_encoder->fmt_in );
 302         }
 303         filter_chain_AppendFromString( id->p_uf_chain, p_stream->p_sys->psz_vf2 );
 304         p_fmt_out = filter_chain_GetFmtOut( id->p_uf_chain );
 305         es_format_Copy( &id->p_encoder->fmt_in, p_fmt_out );
 306         id->p_encoder->fmt_out.video.i_width =
 307             id->p_encoder->fmt_in.video.i_width;
 308         id->p_encoder->fmt_out.video.i_height =
 309             id->p_encoder->fmt_in.video.i_height;
 310         id->p_encoder->fmt_out.video.i_sar_num =
 311             id->p_encoder->fmt_in.video.i_sar_num;
 312         id->p_encoder->fmt_out.video.i_sar_den =
 313             id->p_encoder->fmt_in.video.i_sar_den;
 314     }
 315
 316 }
 317
 318 /* Take care of the scaling and chroma conversions. */
 319 static void conversion_video_filter_append( sout_stream_id_sys_t *id )
 320 {
 321     const es_format_t *p_fmt_out = &id->p_decoder->fmt_out;
 322     if( id->p_f_chain )
 323         p_fmt_out = filter_chain_GetFmtOut( id->p_f_chain );
 324
 325     if( id->p_uf_chain )
 326         p_fmt_out = filter_chain_GetFmtOut( id->p_uf_chain );
 327
 328     if( ( p_fmt_out->video.i_chroma != id->p_encoder->fmt_in.video.i_chroma ) ||
 329         ( p_fmt_out->video.i_width != id->p_encoder->fmt_in.video.i_width ) ||
 330         ( p_fmt_out->video.i_height != id->p_encoder->fmt_in.video.i_height ) )
 331     {
 332         filter_chain_AppendFilter( id->p_uf_chain ? id->p_uf_chain : id->p_f_chain,
 333                                    NULL, NULL,
 334                                    p_fmt_out,
 335                                    &id->p_encoder->fmt_in );
 336     }
 337 }
 338
 339 static void transcode_video_encoder_init( sout_stream_t *p_stream,
 340                                           sout_stream_id_sys_t *id )
 341 {
 342     sout_stream_sys_t *p_sys = p_stream->p_sys;
 343
 344     const es_format_t *p_fmt_out = &id->p_decoder->fmt_out;
 345     if( id->p_f_chain ) {
 346         p_fmt_out = filter_chain_GetFmtOut( id->p_f_chain );
 347     }
 348     if( id->p_uf_chain ) {
 349         p_fmt_out = filter_chain_GetFmtOut( id->p_uf_chain );
 350     }
 351
 352     /* Calculate scaling
 353      * width/height of source */
 354     int i_src_visible_width = p_fmt_out->video.i_visible_width;
 355     int i_src_visible_height = p_fmt_out->video.i_visible_height;
 356
 357     if (i_src_visible_width == 0)
 358         i_src_visible_width = p_fmt_out->video.i_width;
 359     if (i_src_visible_height == 0)
 360         i_src_visible_height = p_fmt_out->video.i_height;
 361
 362
 363     /* with/height scaling */
 364     float f_scale_width = 1;
 365     float f_scale_height = 1;
 366
 367     /* aspect ratio */
 368     float f_aspect = (double)p_fmt_out->video.i_sar_num *
 369                      p_fmt_out->video.i_width /
 370                      p_fmt_out->video.i_sar_den /
 371                      p_fmt_out->video.i_height;
 372
 373     msg_Dbg( p_stream, "decoder aspect is %f:1", (double) f_aspect );
 374
 375     /* Change f_aspect from source frame to source pixel */
 376     f_aspect = f_aspect * i_src_visible_height / i_src_visible_width;
 377     msg_Dbg( p_stream, "source pixel aspect is %f:1", (double) f_aspect );
 378
 379     /* Calculate scaling factor for specified parameters */
 380     if( id->p_encoder->fmt_out.video.i_visible_width <= 0 &&
 381         id->p_encoder->fmt_out.video.i_visible_height <= 0 && p_sys->f_scale )
 382     {
 383         /* Global scaling. Make sure width will remain a factor of 16 */
 384         float f_real_scale;
 385         int  i_new_height;
 386         int i_new_width = i_src_visible_width * p_sys->f_scale;
 387
 388         if( i_new_width % 16 <= 7 && i_new_width >= 16 )
 389             i_new_width -= i_new_width % 16;
 390         else
 391             i_new_width += 16 - i_new_width % 16;
 392
 393         f_real_scale = (float)( i_new_width ) / (float) i_src_visible_width;
 394
 395         i_new_height = __MAX( 16, i_src_visible_height * (float)f_real_scale );
 396
 397         f_scale_width = f_real_scale;
 398         f_scale_height = (float) i_new_height / (float) i_src_visible_height;
 399     }
 400     else if( id->p_encoder->fmt_out.video.i_visible_width > 0 &&
 401              id->p_encoder->fmt_out.video.i_visible_height <= 0 )
 402     {
 403         /* Only width specified */
 404         f_scale_width = (float)id->p_encoder->fmt_out.video.i_visible_width/i_src_visible_width;
 405         f_scale_height = f_scale_width;
 406     }
 407     else if( id->p_encoder->fmt_out.video.i_visible_width <= 0 &&
 408              id->p_encoder->fmt_out.video.i_visible_height > 0 )
 409     {
 410          /* Only height specified */
 411          f_scale_height = (float)id->p_encoder->fmt_out.video.i_visible_height/i_src_visible_height;
 412          f_scale_width = f_scale_height;
 413      }
 414      else if( id->p_encoder->fmt_out.video.i_visible_width > 0 &&
 415               id->p_encoder->fmt_out.video.i_visible_height > 0 )
 416      {
 417          /* Width and height specified */
 418          f_scale_width = (float)id->p_encoder->fmt_out.video.i_visible_width/i_src_visible_width;
 419          f_scale_height = (float)id->p_encoder->fmt_out.video.i_visible_height/i_src_visible_height;
 420      }
 421
 422      /* check maxwidth and maxheight */
 423      if( p_sys->i_maxwidth && f_scale_width > (float)p_sys->i_maxwidth /
 424                                                      i_src_visible_width )
 425      {
 426          f_scale_width = (float)p_sys->i_maxwidth / i_src_visible_width;
 427      }
 428
 429      if( p_sys->i_maxheight && f_scale_height > (float)p_sys->i_maxheight /
 430                                                        i_src_visible_height )
 431      {
 432          f_scale_height = (float)p_sys->i_maxheight / i_src_visible_height;
 433      }
 434
 435
 436      /* Change aspect ratio from source pixel to scaled pixel */
 437      f_aspect = f_aspect * f_scale_height / f_scale_width;
 438      msg_Dbg( p_stream, "scaled pixel aspect is %f:1", (double) f_aspect );
 439
 440      /* f_scale_width and f_scale_height are now final */
 441      /* Calculate width, height from scaling
 442       * Make sure its multiple of 2
 443       */
 444      /* width/height of output stream */
 445      int i_dst_visible_width =  2 * lroundf(f_scale_width*i_src_visible_width/2);
 446      int i_dst_visible_height = 2 * lroundf(f_scale_height*i_src_visible_height/2);
 447      int i_dst_width =  2 * lroundf(f_scale_width*p_fmt_out->video.i_width/2);
 448      int i_dst_height = 2 * lroundf(f_scale_height*p_fmt_out->video.i_height/2);
 449
 450      /* Change aspect ratio from scaled pixel to output frame */
 451      f_aspect = f_aspect * i_dst_visible_width / i_dst_visible_height;
 452
 453      /* Store calculated values */
 454      id->p_encoder->fmt_out.video.i_width = i_dst_width;
 455      id->p_encoder->fmt_out.video.i_visible_width = i_dst_visible_width;
 456      id->p_encoder->fmt_out.video.i_height = i_dst_height;
 457      id->p_encoder->fmt_out.video.i_visible_height = i_dst_visible_height;
 458
 459      id->p_encoder->fmt_in.video.i_width = i_dst_width;
 460      id->p_encoder->fmt_in.video.i_visible_width = i_dst_visible_width;
 461      id->p_encoder->fmt_in.video.i_height = i_dst_height;
 462      id->p_encoder->fmt_in.video.i_visible_height = i_dst_visible_height;
 463
 464      msg_Dbg( p_stream, "source %ix%i, destination %ix%i",
 465          i_src_visible_width, i_src_visible_height,
 466          i_dst_visible_width, i_dst_visible_height
 467      );
 468
 469     /* Handle frame rate conversion */
 470     if( !id->p_encoder->fmt_out.video.i_frame_rate ||
 471         !id->p_encoder->fmt_out.video.i_frame_rate_base )
 472     {
 473         if( p_fmt_out->video.i_frame_rate &&
 474             p_fmt_out->video.i_frame_rate_base )
 475         {
 476             id->p_encoder->fmt_out.video.i_frame_rate =
 477                 p_fmt_out->video.i_frame_rate;
 478             id->p_encoder->fmt_out.video.i_frame_rate_base =
 479                 p_fmt_out->video.i_frame_rate_base;
 480         }
 481         else
 482         {
 483             /* Pick a sensible default value */
 484             id->p_encoder->fmt_out.video.i_frame_rate = ENC_FRAMERATE;
 485             id->p_encoder->fmt_out.video.i_frame_rate_base = ENC_FRAMERATE_BASE;
 486         }
 487     }
 488
 489     id->p_encoder->fmt_in.video.orientation =
 490         id->p_encoder->fmt_out.video.orientation =
 491         id->p_decoder->fmt_in.video.orientation;
 492
 493     id->p_encoder->fmt_in.video.i_frame_rate =
 494         id->p_encoder->fmt_out.video.i_frame_rate;
 495     id->p_encoder->fmt_in.video.i_frame_rate_base =
 496         id->p_encoder->fmt_out.video.i_frame_rate_base;
 497
 498     vlc_ureduce( &id->p_encoder->fmt_in.video.i_frame_rate,
 499         &id->p_encoder->fmt_in.video.i_frame_rate_base,
 500         id->p_encoder->fmt_in.video.i_frame_rate,
 501         id->p_encoder->fmt_in.video.i_frame_rate_base,
 502         0 );
 503      msg_Dbg( p_stream, "source fps %d/%d, destination %d/%d",
 504         id->p_decoder->fmt_out.video.i_frame_rate,
 505         id->p_decoder->fmt_out.video.i_frame_rate_base,
 506         id->p_encoder->fmt_in.video.i_frame_rate,
 507         id->p_encoder->fmt_in.video.i_frame_rate_base );
 508
 509
 510     /* Check whether a particular aspect ratio was requested */
 511     if( id->p_encoder->fmt_out.video.i_sar_num <= 0 ||
 512         id->p_encoder->fmt_out.video.i_sar_den <= 0 )
 513     {
 514         vlc_ureduce( &id->p_encoder->fmt_out.video.i_sar_num,
 515                      &id->p_encoder->fmt_out.video.i_sar_den,
 516                      (uint64_t)p_fmt_out->video.i_sar_num * i_src_visible_width  * i_dst_visible_height,
 517                      (uint64_t)p_fmt_out->video.i_sar_den * i_src_visible_height * i_dst_visible_width,
 518                      0 );
 519     }
 520     else
 521     {
 522         vlc_ureduce( &id->p_encoder->fmt_out.video.i_sar_num,
 523                      &id->p_encoder->fmt_out.video.i_sar_den,
 524                      id->p_encoder->fmt_out.video.i_sar_num,
 525                      id->p_encoder->fmt_out.video.i_sar_den,
 526                      0 );
 527     }
 528
 529     id->p_encoder->fmt_in.video.i_sar_num =
 530         id->p_encoder->fmt_out.video.i_sar_num;
 531     id->p_encoder->fmt_in.video.i_sar_den =
 532         id->p_encoder->fmt_out.video.i_sar_den;
 533
 534     msg_Dbg( p_stream, "encoder aspect is %i:%i",
 535              id->p_encoder->fmt_out.video.i_sar_num * id->p_encoder->fmt_out.video.i_width,
 536              id->p_encoder->fmt_out.video.i_sar_den * id->p_encoder->fmt_out.video.i_height );
 537
 538 }
 539
 540 static int transcode_video_encoder_open( sout_stream_t *p_stream,
 541                                          sout_stream_id_sys_t *id )
 542 {
 543     sout_stream_sys_t *p_sys = p_stream->p_sys;
 544
 545
 546     msg_Dbg( p_stream, "destination (after video filters) %ix%i",
 547              id->p_encoder->fmt_in.video.i_width,
 548              id->p_encoder->fmt_in.video.i_height );
 549
 550     id->p_encoder->p_module =
 551         module_need( id->p_encoder, "encoder", p_sys->psz_venc, true );
 552     if( !id->p_encoder->p_module )
 553     {
 554         msg_Err( p_stream, "cannot find video encoder (module:%s fourcc:%4.4s)",
 555                  p_sys->psz_venc ? p_sys->psz_venc : "any",
 556                  (char *)&p_sys->i_vcodec );
 557         return VLC_EGENERIC;
 558     }
 559
 560     id->p_encoder->fmt_in.video.i_chroma = id->p_encoder->fmt_in.i_codec;
 561
 562     /*  */
 563     id->p_encoder->fmt_out.i_codec =
 564         vlc_fourcc_GetCodec( VIDEO_ES, id->p_encoder->fmt_out.i_codec );
 565
 566     id->id = sout_StreamIdAdd( p_stream->p_next, &id->p_encoder->fmt_out );
 567     if( !id->id )
 568     {
 569         msg_Err( p_stream, "cannot add this stream" );
 570         return VLC_EGENERIC;
 571     }
 572
 573     return VLC_SUCCESS;
 574 }
 575
 576 void transcode_video_close( sout_stream_t *p_stream,
 577                                    sout_stream_id_sys_t *id )
 578 {
 579     if( p_stream->p_sys->i_threads >= 1 && !p_stream->p_sys->b_abort )
 580     {
 581         vlc_mutex_lock( &p_stream->p_sys->lock_out );
 582         p_stream->p_sys->b_abort = true;
 583         vlc_cond_signal( &p_stream->p_sys->cond );
 584         vlc_mutex_unlock( &p_stream->p_sys->lock_out );
 585
 586         vlc_join( p_stream->p_sys->thread, NULL );
 587
 588         picture_fifo_Delete( p_stream->p_sys->pp_pics );
 589         block_ChainRelease( p_stream->p_sys->p_buffers );
 590     }
 591
 592     vlc_mutex_destroy( &p_stream->p_sys->lock_out );
 593     vlc_cond_destroy( &p_stream->p_sys->cond );
 594
 595     /* Close decoder */
 596     if( id->p_decoder->p_module )
 597         module_unneed( id->p_decoder, id->p_decoder->p_module );
 598     if( id->p_decoder->p_description )
 599         vlc_meta_Delete( id->p_decoder->p_description );
 600
 601     free( id->p_decoder->p_owner );
 602
 603     /* Close encoder */
 604     if( id->p_encoder->p_module )
 605         module_unneed( id->p_encoder, id->p_encoder->p_module );
 606
 607     /* Close filters */
 608     if( id->p_f_chain )
 609         filter_chain_Delete( id->p_f_chain );
 610     if( id->p_uf_chain )
 611         filter_chain_Delete( id->p_uf_chain );
 612 }
 613
 614 static void OutputFrame( sout_stream_t *p_stream, picture_t *p_pic, sout_stream_id_sys_t *id, block_t **out )
 615 {
 616     sout_stream_sys_t *p_sys = p_stream->p_sys;
 617     picture_t *p_pic2 = NULL;
 618
 619     /*
 620      * Encoding
 621      */
 622     /* Check if we have a subpicture to overlay */
 623     if( p_sys->p_spu )
 624     {
 625         video_format_t fmt = id->p_encoder->fmt_in.video;
 626         if( fmt.i_visible_width <= 0 || fmt.i_visible_height <= 0 )
 627         {
 628             fmt.i_visible_width  = fmt.i_width;
 629             fmt.i_visible_height = fmt.i_height;
 630             fmt.i_x_offset       = 0;
 631             fmt.i_y_offset       = 0;
 632         }
 633
 634         subpicture_t *p_subpic = spu_Render( p_sys->p_spu, NULL, &fmt,
 635                                              &id->p_decoder->fmt_out.video,
 636                                              p_pic->date, p_pic->date, false );
 637
 638         /* Overlay subpicture */
 639         if( p_subpic )
 640         {
 641             if( picture_IsReferenced( p_pic ) && !filter_chain_GetLength( id->p_f_chain ) )
 642             {
 643                 /* We can't modify the picture, we need to duplicate it,
 644                  * in this point the picture is already p_encoder->fmt.in format*/
 645                 picture_t *p_tmp = video_new_buffer_encoder( id->p_encoder );
 646                 if( likely( p_tmp ) )
 647                 {
 648                     picture_Copy( p_tmp, p_pic );
 649                     picture_Release( p_pic );
 650                     p_pic = p_tmp;
 651                 }
 652             }
 653             if( unlikely( !p_sys->p_spu_blend ) )
 654                 p_sys->p_spu_blend = filter_NewBlend( VLC_OBJECT( p_sys->p_spu ), &fmt );
 655             if( likely( p_sys->p_spu_blend ) )
 656                 picture_BlendSubpicture( p_pic, p_sys->p_spu_blend, p_subpic );
 657             subpicture_Delete( p_subpic );
 658         }
 659     }
 660
 661     if( p_sys->i_threads == 0 )
 662     {
 663         block_t *p_block;
 664
 665         p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
 666         block_ChainAppend( out, p_block );
 667     }
 668
 669     if( p_sys->i_threads )
 670     {
 671         vlc_mutex_lock( &p_sys->lock_out );
 672         picture_fifo_Push( p_sys->pp_pics, p_pic );
 673         vlc_cond_signal( &p_sys->cond );
 674         vlc_mutex_unlock( &p_sys->lock_out );
 675     }
 676
 677     if( p_sys->i_threads && p_pic2 )
 678         picture_Release( p_pic2 );
 679     else if ( p_sys->i_threads == 0 )
 680         picture_Release( p_pic );
 681 }
 682
 683 int transcode_video_process( sout_stream_t *p_stream, sout_stream_id_sys_t *id,
 684                                     block_t *in, block_t **out )
 685 {
 686     sout_stream_sys_t *p_sys = p_stream->p_sys;
 687     picture_t *p_pic = NULL;
 688     *out = NULL;
 689
 690     if( unlikely( in == NULL ) )
 691     {
 692         if( p_sys->i_threads == 0 )
 693         {
 694             block_t *p_block;
 695             do {
 696                 p_block = id->p_encoder->pf_encode_video(id->p_encoder, NULL );
 697                 block_ChainAppend( out, p_block );
 698             } while( p_block );
 699         }
 700         else
 701         {
 702             msg_Dbg( p_stream, "Flushing thread and waiting that");
 703             vlc_mutex_lock( &p_stream->p_sys->lock_out );
 704             p_stream->p_sys->b_abort = true;
 705             vlc_cond_signal( &p_stream->p_sys->cond );
 706             vlc_mutex_unlock( &p_stream->p_sys->lock_out );
 707
 708             vlc_join( p_stream->p_sys->thread, NULL );
 709             vlc_mutex_lock( &p_sys->lock_out );
 710             *out = p_sys->p_buffers;
 711             p_sys->p_buffers = NULL;
 712             vlc_mutex_unlock( &p_sys->lock_out );
 713
 714             msg_Dbg( p_stream, "Flushing done");
 715         }
 716         return VLC_SUCCESS;
 717     }
 718
 719
 720     while( (p_pic = id->p_decoder->pf_decode_video( id->p_decoder, &in )) )
 721     {
 722
 723         if( unlikely (
 724              id->p_encoder->p_module &&
 725              !video_format_IsSimilar( &id->fmt_input_video, &id->p_decoder->fmt_out.video )
 726             )
 727           )
 728         {
 729             msg_Info( p_stream, "aspect-ratio changed, reiniting. %i -> %i : %i -> %i.",
 730                         id->fmt_input_video.i_sar_num, id->p_decoder->fmt_out.video.i_sar_num,
 731                         id->fmt_input_video.i_sar_den, id->p_decoder->fmt_out.video.i_sar_den
 732                     );
 733             /* Close filters */
 734             if( id->p_f_chain )
 735                 filter_chain_Delete( id->p_f_chain );
 736             id->p_f_chain = NULL;
 737             if( id->p_uf_chain )
 738                 filter_chain_Delete( id->p_uf_chain );
 739             id->p_uf_chain = NULL;
 740
 741             /* Reinitialize filters */
 742             id->p_encoder->fmt_out.video.i_visible_width  = p_sys->i_width & ~1;
 743             id->p_encoder->fmt_out.video.i_visible_height = p_sys->i_height & ~1;
 744             id->p_encoder->fmt_out.video.i_sar_num = id->p_encoder->fmt_out.video.i_sar_den = 0;
 745
 746             transcode_video_filter_init( p_stream, id );
 747             transcode_video_encoder_init( p_stream, id );
 748             conversion_video_filter_append( id );
 749             memcpy( &id->fmt_input_video, &id->p_decoder->fmt_out.video, sizeof(video_format_t));
 750         }
 751
 752
 753         if( unlikely( !id->p_encoder->p_module ) )
 754         {
 755             if( id->p_f_chain )
 756                 filter_chain_Delete( id->p_f_chain );
 757             if( id->p_uf_chain )
 758                 filter_chain_Delete( id->p_uf_chain );
 759             id->p_f_chain = id->p_uf_chain = NULL;
 760
 761             transcode_video_filter_init( p_stream, id );
 762             transcode_video_encoder_init( p_stream, id );
 763             conversion_video_filter_append( id );
 764             memcpy( &id->fmt_input_video, &id->p_decoder->fmt_out.video, sizeof(video_format_t));
 765
 766             if( transcode_video_encoder_open( p_stream, id ) != VLC_SUCCESS )
 767             {
 768                 picture_Release( p_pic );
 769                 transcode_video_close( p_stream, id );
 770                 id->b_transcode = false;
 771                 return VLC_EGENERIC;
 772             }
 773         }
 774
 775         /* Run the filter and output chains; first with the picture,
 776          * and then with NULL as many times as we need until they
 777          * stop outputting frames.
 778          */
 779         for ( ;; ) {
 780             picture_t *p_filtered_pic = p_pic;
 781
 782             /* Run filter chain */
 783             if( id->p_f_chain )
 784                 p_filtered_pic = filter_chain_VideoFilter( id->p_f_chain, p_filtered_pic );
 785             if( !p_filtered_pic )
 786                 break;
 787
 788             for ( ;; ) {
 789                 picture_t *p_user_filtered_pic = p_filtered_pic;
 790
 791                 /* Run user specified filter chain */
 792                 if( id->p_uf_chain )
 793                     p_user_filtered_pic = filter_chain_VideoFilter( id->p_uf_chain, p_user_filtered_pic );
 794                 if( !p_user_filtered_pic )
 795                     break;
 796
 797                 OutputFrame( p_stream, p_user_filtered_pic, id, out );
 798
 799                 p_filtered_pic = NULL;
 800             }
 801
 802             p_pic = NULL;
 803         }
 804     }
 805
 806     if( p_sys->i_threads >= 1 )
 807     {
 808         /* Pick up any return data the encoder thread wants to output. */
 809         vlc_mutex_lock( &p_sys->lock_out );
 810         *out = p_sys->p_buffers;
 811         p_sys->p_buffers = NULL;
 812         vlc_mutex_unlock( &p_sys->lock_out );
 813     }
 814
 815     return VLC_SUCCESS;
 816 }
 817
 818 bool transcode_video_add( sout_stream_t *p_stream, const es_format_t *p_fmt,
 819                                 sout_stream_id_sys_t *id )
 820 {
 821     sout_stream_sys_t *p_sys = p_stream->p_sys;
 822
 823     msg_Dbg( p_stream,
 824              "creating video transcoding from fcc=`%4.4s' to fcc=`%4.4s'",
 825              (char*)&p_fmt->i_codec, (char*)&p_sys->i_vcodec );
 826
 827     /* Complete destination format */
 828     id->p_encoder->fmt_out.i_codec = p_sys->i_vcodec;
 829     id->p_encoder->fmt_out.video.i_visible_width  = p_sys->i_width & ~1;
 830     id->p_encoder->fmt_out.video.i_visible_height = p_sys->i_height & ~1;
 831     id->p_encoder->fmt_out.i_bitrate = p_sys->i_vbitrate;
 832
 833     /* Build decoder -> filter -> encoder chain */
 834     if( transcode_video_new( p_stream, id ) )
 835     {
 836         msg_Err( p_stream, "cannot create video chain" );
 837         return false;
 838     }
 839
 840     /* Stream will be added later on because we don't know
 841      * all the characteristics of the decoded stream yet */
 842     id->b_transcode = true;
 843
 844     if( p_sys->fps_num )
 845     {
 846         id->p_encoder->fmt_in.video.i_frame_rate = id->p_encoder->fmt_out.video.i_frame_rate = (p_sys->fps_num );
 847         id->p_encoder->fmt_in.video.i_frame_rate_base = id->p_encoder->fmt_out.video.i_frame_rate_base = (p_sys->fps_den ? p_sys->fps_den : 1);
 848     }
 849
 850     return true;
 851 }
 852