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

   1 /*****************************************************************************
   2  * video.c: transcoding stream output module (video)
   3  *****************************************************************************
   4  * Copyright (C) 2003-2009 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *          Jean-Paul Saman <jpsaman #_at_# m2x dot nl>
  10  *          Antoine Cellerier <dionoea at videolan dot org>
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU Lesser General Public License as published by
  14  * the Free Software Foundation; either version 2.1 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  20  * GNU Lesser General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Lesser General Public License
  23  * along with this program; if not, write to the Free Software Foundation,
  24  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30
  31 #include "transcode.h"
  32
  33 #include <vlc_meta.h>
  34 #include <vlc_spu.h>
  35 #include <vlc_modules.h>
  36
  37 #define ENC_FRAMERATE (25 * 1000)
  38 #define ENC_FRAMERATE_BASE 1000
  39
  40 struct decoder_owner_sys_t
  41 {
  42     sout_stream_sys_t *p_sys;
  43 };
  44
  45 static void video_del_buffer_decoder( decoder_t *p_decoder, picture_t *p_pic )
  46 {
  47     VLC_UNUSED(p_decoder);
  48     picture_Release( p_pic );
  49 }
  50
  51 static void video_link_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
  52 {
  53     VLC_UNUSED(p_dec);
  54     picture_Hold( p_pic );
  55 }
  56
  57 static void video_unlink_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
  58 {
  59     VLC_UNUSED(p_dec);
  60     picture_Release( p_pic );
  61 }
  62
  63 static picture_t *video_new_buffer_decoder( decoder_t *p_dec )
  64 {
  65     p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
  66     return picture_NewFromFormat( &p_dec->fmt_out.video );
  67 }
  68
  69 static picture_t *video_new_buffer_encoder( encoder_t *p_enc )
  70 {
  71     p_enc->fmt_in.video.i_chroma = p_enc->fmt_in.i_codec;
  72     return picture_NewFromFormat( &p_enc->fmt_in.video );
  73 }
  74
  75 static picture_t *transcode_video_filter_buffer_new( filter_t *p_filter )
  76 {
  77     p_filter->fmt_out.video.i_chroma = p_filter->fmt_out.i_codec;
  78     return picture_NewFromFormat( &p_filter->fmt_out.video );
  79 }
  80 static void transcode_video_filter_buffer_del( filter_t *p_filter, picture_t *p_pic )
  81 {
  82     VLC_UNUSED(p_filter);
  83     picture_Release( p_pic );
  84 }
  85
  86 static int transcode_video_filter_allocation_init( filter_t *p_filter,
  87                                                    void *p_data )
  88 {
  89     VLC_UNUSED(p_data);
  90     p_filter->pf_video_buffer_new = transcode_video_filter_buffer_new;
  91     p_filter->pf_video_buffer_del = transcode_video_filter_buffer_del;
  92     return VLC_SUCCESS;
  93 }
  94
  95 static void transcode_video_filter_allocation_clear( filter_t *p_filter )
  96 {
  97     VLC_UNUSED(p_filter);
  98 }
  99
 100 static void* EncoderThread( void *obj )
 101 {
 102     sout_stream_sys_t *p_sys = (sout_stream_sys_t*)obj;
 103     sout_stream_id_t *id = p_sys->id_video;
 104     picture_t *p_pic = NULL;
 105     int canc = vlc_savecancel ();
 106     block_t *p_block = NULL;
 107
 108     for( ;; )
 109     {
 110
 111         vlc_mutex_lock( &p_sys->lock_out );
 112         while( !p_sys->b_abort &&
 113                (p_pic = picture_fifo_Pop( p_sys->pp_pics )) == NULL )
 114             vlc_cond_wait( &p_sys->cond, &p_sys->lock_out );
 115
 116         if( p_sys->b_abort && !p_pic )
 117         {
 118             vlc_mutex_unlock( &p_sys->lock_out );
 119             break;
 120         }
 121         vlc_mutex_unlock( &p_sys->lock_out );
 122
 123         if( p_pic )
 124         {
 125             p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
 126
 127             vlc_mutex_lock( &p_sys->lock_out );
 128             block_ChainAppend( &p_sys->p_buffers, p_block );
 129
 130             vlc_mutex_unlock( &p_sys->lock_out );
 131             picture_Release( p_pic );
 132         }
 133
 134         vlc_mutex_lock( &p_sys->lock_out );
 135         if( p_sys->b_abort )
 136         {
 137             vlc_mutex_unlock( &p_sys->lock_out );
 138             break;
 139         }
 140         vlc_mutex_unlock( &p_sys->lock_out );
 141     }
 142
 143     /*Encode what we have in the buffer on closing*/
 144     vlc_mutex_lock( &p_sys->lock_out );
 145     while( (p_pic = picture_fifo_Pop( p_sys->pp_pics )) != NULL )
 146     {
 147         p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
 148
 149         block_ChainAppend( &p_sys->p_buffers, p_block );
 150
 151         picture_Release( p_pic );
 152     }
 153
 154     /*Now flush encoder*/
 155     do {
 156        p_block = id->p_encoder->pf_encode_video(id->p_encoder, NULL );
 157        block_ChainAppend( &p_sys->p_buffers, p_block );
 158     } while( p_block );
 159
 160     vlc_mutex_unlock( &p_sys->lock_out );
 161
 162
 163     vlc_restorecancel (canc);
 164     return NULL;
 165 }
 166
 167 int transcode_video_new( sout_stream_t *p_stream, sout_stream_id_t *id )
 168 {
 169     sout_stream_sys_t *p_sys = p_stream->p_sys;
 170
 171     /* Open decoder
 172      * Initialization of decoder structures
 173      */
 174     id->p_decoder->fmt_out = id->p_decoder->fmt_in;
 175     id->p_decoder->fmt_out.i_extra = 0;
 176     id->p_decoder->fmt_out.p_extra = 0;
 177     id->p_decoder->pf_decode_video = NULL;
 178     id->p_decoder->pf_get_cc = NULL;
 179     id->p_decoder->pf_get_cc = 0;
 180     id->p_decoder->pf_vout_buffer_new = video_new_buffer_decoder;
 181     id->p_decoder->pf_vout_buffer_del = video_del_buffer_decoder;
 182     id->p_decoder->pf_picture_link    = video_link_picture_decoder;
 183     id->p_decoder->pf_picture_unlink  = video_unlink_picture_decoder;
 184     id->p_decoder->p_owner = malloc( sizeof(decoder_owner_sys_t) );
 185     if( !id->p_decoder->p_owner )
 186         return VLC_EGENERIC;
 187
 188     id->p_decoder->p_owner->p_sys = p_sys;
 189     /* id->p_decoder->p_cfg = p_sys->p_video_cfg; */
 190
 191     id->p_decoder->p_module =
 192         module_need( id->p_decoder, "decoder", "$codec", false );
 193
 194     if( !id->p_decoder->p_module )
 195     {
 196         msg_Err( p_stream, "cannot find video decoder" );
 197         free( id->p_decoder->p_owner );
 198         return VLC_EGENERIC;
 199     }
 200
 201     /*
 202      * Open encoder.
 203      * Because some info about the decoded input will only be available
 204      * once the first frame is decoded, we actually only test the availability
 205      * of the encoder here.
 206      */
 207
 208     /* Initialization of encoder format structures */
 209     es_format_Init( &id->p_encoder->fmt_in, id->p_decoder->fmt_in.i_cat,
 210                     id->p_decoder->fmt_out.i_codec );
 211     id->p_encoder->fmt_in.video.i_chroma = id->p_decoder->fmt_out.i_codec;
 212
 213     /* The dimensions will be set properly later on.
 214      * Just put sensible values so we can test an encoder is available. */
 215     id->p_encoder->fmt_in.video.i_width =
 216         id->p_encoder->fmt_out.video.i_width
 217           ? id->p_encoder->fmt_out.video.i_width
 218           : id->p_decoder->fmt_in.video.i_width
 219             ? id->p_decoder->fmt_in.video.i_width : 16;
 220     id->p_encoder->fmt_in.video.i_height =
 221         id->p_encoder->fmt_out.video.i_height
 222           ? id->p_encoder->fmt_out.video.i_height
 223           : id->p_decoder->fmt_in.video.i_height
 224             ? id->p_decoder->fmt_in.video.i_height : 16;
 225     id->p_encoder->fmt_in.video.i_visible_width =
 226         id->p_encoder->fmt_out.video.i_visible_width
 227           ? id->p_encoder->fmt_out.video.i_visible_width
 228           : id->p_decoder->fmt_in.video.i_visible_width
 229             ? id->p_decoder->fmt_in.video.i_visible_width : id->p_encoder->fmt_in.video.i_width;
 230     id->p_encoder->fmt_in.video.i_visible_height =
 231         id->p_encoder->fmt_out.video.i_visible_height
 232           ? id->p_encoder->fmt_out.video.i_visible_height
 233           : id->p_decoder->fmt_in.video.i_visible_height
 234             ? id->p_decoder->fmt_in.video.i_visible_height : id->p_encoder->fmt_in.video.i_height;
 235     id->p_encoder->fmt_in.video.i_frame_rate = id->p_decoder->fmt_out.video.i_frame_rate;
 236     id->p_encoder->fmt_in.video.i_frame_rate_base = id->p_decoder->fmt_out.video.i_frame_rate_base;
 237
 238     id->p_encoder->i_threads = p_sys->i_threads;
 239     id->p_encoder->p_cfg = p_sys->p_video_cfg;
 240
 241     id->p_encoder->p_module =
 242         module_need( id->p_encoder, "encoder", p_sys->psz_venc, true );
 243     if( !id->p_encoder->p_module )
 244     {
 245         msg_Err( p_stream, "cannot find video encoder (module:%s fourcc:%4.4s). Take a look few lines earlier to see possible reason.",
 246                  p_sys->psz_venc ? p_sys->psz_venc : "any",
 247                  (char *)&p_sys->i_vcodec );
 248         module_unneed( id->p_decoder, id->p_decoder->p_module );
 249         id->p_decoder->p_module = 0;
 250         free( id->p_decoder->p_owner );
 251         return VLC_EGENERIC;
 252     }
 253
 254     /* Close the encoder.
 255      * We'll open it only when we have the first frame. */
 256     module_unneed( id->p_encoder, id->p_encoder->p_module );
 257     if( id->p_encoder->fmt_out.p_extra )
 258     {
 259         free( id->p_encoder->fmt_out.p_extra );
 260         id->p_encoder->fmt_out.p_extra = NULL;
 261         id->p_encoder->fmt_out.i_extra = 0;
 262     }
 263     id->p_encoder->p_module = NULL;
 264
 265     if( p_sys->i_threads >= 1 )
 266     {
 267         int i_priority = p_sys->b_high_priority ? VLC_THREAD_PRIORITY_OUTPUT :
 268                            VLC_THREAD_PRIORITY_VIDEO;
 269         p_sys->id_video = id;
 270         vlc_mutex_init( &p_sys->lock_out );
 271         vlc_cond_init( &p_sys->cond );
 272         p_sys->pp_pics = picture_fifo_New();
 273         if( p_sys->pp_pics == NULL )
 274         {
 275             msg_Err( p_stream, "cannot create picture fifo" );
 276             vlc_mutex_destroy( &p_sys->lock_out );
 277             vlc_cond_destroy( &p_sys->cond );
 278             module_unneed( id->p_decoder, id->p_decoder->p_module );
 279             id->p_decoder->p_module = NULL;
 280             free( id->p_decoder->p_owner );
 281             return VLC_ENOMEM;
 282         }
 283         p_sys->p_buffers = NULL;
 284         p_sys->b_abort = false;
 285         if( vlc_clone( &p_sys->thread, EncoderThread, p_sys, i_priority ) )
 286         {
 287             msg_Err( p_stream, "cannot spawn encoder thread" );
 288             vlc_mutex_destroy( &p_sys->lock_out );
 289             vlc_cond_destroy( &p_sys->cond );
 290             picture_fifo_Delete( p_sys->pp_pics );
 291             module_unneed( id->p_decoder, id->p_decoder->p_module );
 292             id->p_decoder->p_module = NULL;
 293             free( id->p_decoder->p_owner );
 294             return VLC_EGENERIC;
 295         }
 296     }
 297     return VLC_SUCCESS;
 298 }
 299
 300 static void transcode_video_filter_init( sout_stream_t *p_stream,
 301                                          sout_stream_id_t *id )
 302 {
 303     es_format_t *p_fmt_out = &id->p_decoder->fmt_out;
 304     id->p_encoder->fmt_in.video.i_chroma = id->p_encoder->fmt_in.i_codec;
 305
 306     id->p_f_chain = filter_chain_New( p_stream, "video filter2",
 307                                       false,
 308                                       transcode_video_filter_allocation_init,
 309                                       transcode_video_filter_allocation_clear,
 310                                       p_stream->p_sys );
 311     filter_chain_Reset( id->p_f_chain, p_fmt_out, p_fmt_out );
 312
 313     /* Deinterlace */
 314     if( p_stream->p_sys->b_deinterlace )
 315     {
 316         filter_chain_AppendFilter( id->p_f_chain,
 317                                    p_stream->p_sys->psz_deinterlace,
 318                                    p_stream->p_sys->p_deinterlace_cfg,
 319                                    &id->p_decoder->fmt_out,
 320                                    &id->p_decoder->fmt_out );
 321
 322         p_fmt_out = filter_chain_GetFmtOut( id->p_f_chain );
 323     }
 324
 325     /* Check that we have visible_width/height*/
 326     if( !p_fmt_out->video.i_visible_height )
 327         p_fmt_out->video.i_visible_height = p_fmt_out->video.i_height;
 328     if( !p_fmt_out->video.i_visible_width )
 329         p_fmt_out->video.i_visible_width = p_fmt_out->video.i_width;
 330
 331     if( p_stream->p_sys->psz_vf2 )
 332     {
 333         id->p_uf_chain = filter_chain_New( p_stream, "video filter2",
 334                                           true,
 335                            transcode_video_filter_allocation_init,
 336                            transcode_video_filter_allocation_clear,
 337                            p_stream->p_sys );
 338         filter_chain_Reset( id->p_uf_chain, p_fmt_out,
 339                             &id->p_encoder->fmt_in );
 340         if( p_fmt_out->video.i_chroma != id->p_encoder->fmt_in.video.i_chroma )
 341         {
 342             filter_chain_AppendFilter( id->p_uf_chain,
 343                                    NULL, NULL,
 344                                    p_fmt_out,
 345                                    &id->p_encoder->fmt_in );
 346         }
 347         filter_chain_AppendFromString( id->p_uf_chain, p_stream->p_sys->psz_vf2 );
 348         p_fmt_out = filter_chain_GetFmtOut( id->p_uf_chain );
 349         es_format_Copy( &id->p_encoder->fmt_in, p_fmt_out );
 350         id->p_encoder->fmt_out.video.i_width =
 351             id->p_encoder->fmt_in.video.i_width;
 352         id->p_encoder->fmt_out.video.i_height =
 353             id->p_encoder->fmt_in.video.i_height;
 354         id->p_encoder->fmt_out.video.i_sar_num =
 355             id->p_encoder->fmt_in.video.i_sar_num;
 356         id->p_encoder->fmt_out.video.i_sar_den =
 357             id->p_encoder->fmt_in.video.i_sar_den;
 358     }
 359
 360 }
 361
 362 /* Take care of the scaling and chroma conversions. */
 363 static void conversion_video_filter_append( sout_stream_id_t *id )
 364 {
 365     const es_format_t *p_fmt_out = &id->p_decoder->fmt_out;
 366     if( id->p_f_chain )
 367         p_fmt_out = filter_chain_GetFmtOut( id->p_f_chain );
 368     if( id->p_uf_chain )
 369         p_fmt_out = filter_chain_GetFmtOut( id->p_uf_chain );
 370
 371     if( ( p_fmt_out->video.i_chroma != id->p_encoder->fmt_in.video.i_chroma ) ||
 372         ( p_fmt_out->video.i_width != id->p_encoder->fmt_in.video.i_width ) ||
 373         ( p_fmt_out->video.i_height != id->p_encoder->fmt_in.video.i_height ) )
 374     {
 375         filter_chain_AppendFilter( id->p_f_chain,
 376                                    NULL, NULL,
 377                                    p_fmt_out,
 378                                    &id->p_encoder->fmt_in );
 379     }
 380 }
 381
 382 static void transcode_video_encoder_init( sout_stream_t *p_stream,
 383                                           sout_stream_id_t *id )
 384 {
 385     sout_stream_sys_t *p_sys = p_stream->p_sys;
 386
 387     const es_format_t *p_fmt_out = &id->p_decoder->fmt_out;
 388     if( id->p_f_chain ) {
 389         p_fmt_out = filter_chain_GetFmtOut( id->p_f_chain );
 390     }
 391     if( id->p_uf_chain ) {
 392         p_fmt_out = filter_chain_GetFmtOut( id->p_uf_chain );
 393     }
 394
 395     /* Calculate scaling
 396      * width/height of source */
 397     int i_src_visible_width = p_fmt_out->video.i_visible_width;
 398     int i_src_visible_height = p_fmt_out->video.i_visible_height;
 399
 400     if (i_src_visible_width == 0)
 401         i_src_visible_width = p_fmt_out->video.i_width;
 402     if (i_src_visible_height == 0)
 403         i_src_visible_height = p_fmt_out->video.i_height;
 404
 405
 406     /* with/height scaling */
 407     float f_scale_width = 1;
 408     float f_scale_height = 1;
 409
 410     /* aspect ratio */
 411     float f_aspect = (double)p_fmt_out->video.i_sar_num *
 412                      p_fmt_out->video.i_width /
 413                      p_fmt_out->video.i_sar_den /
 414                      p_fmt_out->video.i_height;
 415
 416     msg_Dbg( p_stream, "decoder aspect is %f:1", f_aspect );
 417
 418     /* Change f_aspect from source frame to source pixel */
 419     f_aspect = f_aspect * i_src_visible_height / i_src_visible_width;
 420     msg_Dbg( p_stream, "source pixel aspect is %f:1", f_aspect );
 421
 422     /* Calculate scaling factor for specified parameters */
 423     if( id->p_encoder->fmt_out.video.i_visible_width <= 0 &&
 424         id->p_encoder->fmt_out.video.i_visible_height <= 0 && p_sys->f_scale )
 425     {
 426         /* Global scaling. Make sure width will remain a factor of 16 */
 427         float f_real_scale;
 428         int  i_new_height;
 429         int i_new_width = i_src_visible_width * p_sys->f_scale;
 430
 431         if( i_new_width % 16 <= 7 && i_new_width >= 16 )
 432             i_new_width -= i_new_width % 16;
 433         else
 434             i_new_width += 16 - i_new_width % 16;
 435
 436         f_real_scale = (float)( i_new_width ) / (float) i_src_visible_width;
 437
 438         i_new_height = __MAX( 16, i_src_visible_height * (float)f_real_scale );
 439
 440         f_scale_width = f_real_scale;
 441         f_scale_height = (float) i_new_height / (float) i_src_visible_height;
 442     }
 443     else if( id->p_encoder->fmt_out.video.i_visible_width > 0 &&
 444              id->p_encoder->fmt_out.video.i_visible_height <= 0 )
 445     {
 446         /* Only width specified */
 447         f_scale_width = (float)id->p_encoder->fmt_out.video.i_visible_width/i_src_visible_width;
 448         f_scale_height = f_scale_width;
 449     }
 450     else if( id->p_encoder->fmt_out.video.i_visible_width <= 0 &&
 451              id->p_encoder->fmt_out.video.i_visible_height > 0 )
 452     {
 453          /* Only height specified */
 454          f_scale_height = (float)id->p_encoder->fmt_out.video.i_visible_height/i_src_visible_height;
 455          f_scale_width = f_scale_height;
 456      }
 457      else if( id->p_encoder->fmt_out.video.i_visible_width > 0 &&
 458               id->p_encoder->fmt_out.video.i_visible_height > 0 )
 459      {
 460          /* Width and height specified */
 461          f_scale_width = (float)id->p_encoder->fmt_out.video.i_visible_width/i_src_visible_width;
 462          f_scale_height = (float)id->p_encoder->fmt_out.video.i_visible_height/i_src_visible_height;
 463      }
 464
 465      /* check maxwidth and maxheight */
 466      if( p_sys->i_maxwidth && f_scale_width > (float)p_sys->i_maxwidth /
 467                                                      i_src_visible_width )
 468      {
 469          f_scale_width = (float)p_sys->i_maxwidth / i_src_visible_width;
 470      }
 471
 472      if( p_sys->i_maxheight && f_scale_height > (float)p_sys->i_maxheight /
 473                                                        i_src_visible_height )
 474      {
 475          f_scale_height = (float)p_sys->i_maxheight / i_src_visible_height;
 476      }
 477
 478
 479      /* Change aspect ratio from source pixel to scaled pixel */
 480      f_aspect = f_aspect * f_scale_height / f_scale_width;
 481      msg_Dbg( p_stream, "scaled pixel aspect is %f:1", f_aspect );
 482
 483      /* f_scale_width and f_scale_height are now final */
 484      /* Calculate width, height from scaling
 485       * Make sure its multiple of 2
 486       */
 487      /* width/height of output stream */
 488      int i_dst_visible_width =  2 * (int)(f_scale_width*i_src_visible_width/2+0.5);
 489      int i_dst_visible_height = 2 * (int)(f_scale_height*i_src_visible_height/2+0.5);
 490      int i_dst_width =  2 * (int)(f_scale_width*p_fmt_out->video.i_width/2+0.5);
 491      int i_dst_height = 2 * (int)(f_scale_height*p_fmt_out->video.i_height/2+0.5);
 492
 493      /* Change aspect ratio from scaled pixel to output frame */
 494      f_aspect = f_aspect * i_dst_visible_width / i_dst_visible_height;
 495
 496      /* Store calculated values */
 497      id->p_encoder->fmt_out.video.i_width = i_dst_width;
 498      id->p_encoder->fmt_out.video.i_visible_width = i_dst_visible_width;
 499      id->p_encoder->fmt_out.video.i_height = i_dst_height;
 500      id->p_encoder->fmt_out.video.i_visible_height = i_dst_visible_height;
 501
 502      id->p_encoder->fmt_in.video.i_width = i_dst_width;
 503      id->p_encoder->fmt_in.video.i_visible_width = i_dst_visible_width;
 504      id->p_encoder->fmt_in.video.i_height = i_dst_height;
 505      id->p_encoder->fmt_in.video.i_visible_height = i_dst_visible_height;
 506
 507      msg_Dbg( p_stream, "source %ix%i, destination %ix%i",
 508          i_src_visible_width, i_src_visible_height,
 509          i_dst_visible_width, i_dst_visible_height
 510      );
 511
 512     /* Handle frame rate conversion */
 513     if( !id->p_encoder->fmt_out.video.i_frame_rate ||
 514         !id->p_encoder->fmt_out.video.i_frame_rate_base )
 515     {
 516         if( p_fmt_out->video.i_frame_rate &&
 517             p_fmt_out->video.i_frame_rate_base )
 518         {
 519             id->p_encoder->fmt_out.video.i_frame_rate =
 520                 p_fmt_out->video.i_frame_rate;
 521             id->p_encoder->fmt_out.video.i_frame_rate_base =
 522                 p_fmt_out->video.i_frame_rate_base;
 523         }
 524         else
 525         {
 526             /* Pick a sensible default value */
 527             id->p_encoder->fmt_out.video.i_frame_rate = ENC_FRAMERATE;
 528             id->p_encoder->fmt_out.video.i_frame_rate_base = ENC_FRAMERATE_BASE;
 529         }
 530     }
 531
 532     id->p_encoder->fmt_in.video.i_frame_rate =
 533         id->p_encoder->fmt_out.video.i_frame_rate;
 534     id->p_encoder->fmt_in.video.i_frame_rate_base =
 535         id->p_encoder->fmt_out.video.i_frame_rate_base;
 536
 537     vlc_ureduce( &id->p_encoder->fmt_in.video.i_frame_rate,
 538         &id->p_encoder->fmt_in.video.i_frame_rate_base,
 539         id->p_encoder->fmt_in.video.i_frame_rate,
 540         id->p_encoder->fmt_in.video.i_frame_rate_base,
 541         0 );
 542      msg_Dbg( p_stream, "source fps %d/%d, destination %d/%d",
 543         id->p_decoder->fmt_out.video.i_frame_rate,
 544         id->p_decoder->fmt_out.video.i_frame_rate_base,
 545         id->p_encoder->fmt_in.video.i_frame_rate,
 546         id->p_encoder->fmt_in.video.i_frame_rate_base );
 547
 548     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;
 549     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;
 550     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,
 551                         id->i_output_frame_interval, id->p_encoder->fmt_in.video.i_frame_rate_base );
 552
 553     date_Init( &id->interpolated_pts,
 554                id->p_decoder->fmt_out.video.i_frame_rate,
 555                1 );
 556     date_Init( &id->next_output_pts,
 557                id->p_encoder->fmt_in.video.i_frame_rate,
 558                1 );
 559
 560     /* Check whether a particular aspect ratio was requested */
 561     if( id->p_encoder->fmt_out.video.i_sar_num <= 0 ||
 562         id->p_encoder->fmt_out.video.i_sar_den <= 0 )
 563     {
 564         vlc_ureduce( &id->p_encoder->fmt_out.video.i_sar_num,
 565                      &id->p_encoder->fmt_out.video.i_sar_den,
 566                      (uint64_t)p_fmt_out->video.i_sar_num * i_src_visible_width  * i_dst_visible_height,
 567                      (uint64_t)p_fmt_out->video.i_sar_den * i_src_visible_height * i_dst_visible_width,
 568                      0 );
 569     }
 570     else
 571     {
 572         vlc_ureduce( &id->p_encoder->fmt_out.video.i_sar_num,
 573                      &id->p_encoder->fmt_out.video.i_sar_den,
 574                      id->p_encoder->fmt_out.video.i_sar_num,
 575                      id->p_encoder->fmt_out.video.i_sar_den,
 576                      0 );
 577     }
 578
 579     id->p_encoder->fmt_in.video.i_sar_num =
 580         id->p_encoder->fmt_out.video.i_sar_num;
 581     id->p_encoder->fmt_in.video.i_sar_den =
 582         id->p_encoder->fmt_out.video.i_sar_den;
 583
 584     msg_Dbg( p_stream, "encoder aspect is %i:%i",
 585              id->p_encoder->fmt_out.video.i_sar_num * id->p_encoder->fmt_out.video.i_width,
 586              id->p_encoder->fmt_out.video.i_sar_den * id->p_encoder->fmt_out.video.i_height );
 587
 588 }
 589
 590 static int transcode_video_encoder_open( sout_stream_t *p_stream,
 591                                          sout_stream_id_t *id )
 592 {
 593     sout_stream_sys_t *p_sys = p_stream->p_sys;
 594
 595
 596     msg_Dbg( p_stream, "destination (after video filters) %ix%i",
 597              id->p_encoder->fmt_in.video.i_width,
 598              id->p_encoder->fmt_in.video.i_height );
 599
 600     id->p_encoder->p_module =
 601         module_need( id->p_encoder, "encoder", p_sys->psz_venc, true );
 602     if( !id->p_encoder->p_module )
 603     {
 604         msg_Err( p_stream, "cannot find video encoder (module:%s fourcc:%4.4s)",
 605                  p_sys->psz_venc ? p_sys->psz_venc : "any",
 606                  (char *)&p_sys->i_vcodec );
 607         return VLC_EGENERIC;
 608     }
 609
 610     id->p_encoder->fmt_in.video.i_chroma = id->p_encoder->fmt_in.i_codec;
 611
 612     /*  */
 613     id->p_encoder->fmt_out.i_codec =
 614         vlc_fourcc_GetCodec( VIDEO_ES, id->p_encoder->fmt_out.i_codec );
 615
 616     id->id = sout_StreamIdAdd( p_stream->p_next, &id->p_encoder->fmt_out );
 617     if( !id->id )
 618     {
 619         msg_Err( p_stream, "cannot add this stream" );
 620         return VLC_EGENERIC;
 621     }
 622
 623     return VLC_SUCCESS;
 624 }
 625
 626 void transcode_video_close( sout_stream_t *p_stream,
 627                                    sout_stream_id_t *id )
 628 {
 629     if( p_stream->p_sys->i_threads >= 1 )
 630     {
 631         vlc_mutex_lock( &p_stream->p_sys->lock_out );
 632         p_stream->p_sys->b_abort = true;
 633         vlc_cond_signal( &p_stream->p_sys->cond );
 634         vlc_mutex_unlock( &p_stream->p_sys->lock_out );
 635
 636         vlc_join( p_stream->p_sys->thread, NULL );
 637         vlc_mutex_destroy( &p_stream->p_sys->lock_out );
 638         vlc_cond_destroy( &p_stream->p_sys->cond );
 639
 640         picture_fifo_Delete( p_stream->p_sys->pp_pics );
 641         block_ChainRelease( p_stream->p_sys->p_buffers );
 642         p_stream->p_sys->pp_pics = NULL;
 643     }
 644
 645     /* Close decoder */
 646     if( id->p_decoder->p_module )
 647         module_unneed( id->p_decoder, id->p_decoder->p_module );
 648     if( id->p_decoder->p_description )
 649         vlc_meta_Delete( id->p_decoder->p_description );
 650
 651     free( id->p_decoder->p_owner );
 652
 653     /* Close encoder */
 654     if( id->p_encoder->p_module )
 655         module_unneed( id->p_encoder, id->p_encoder->p_module );
 656
 657     /* Close filters */
 658     if( id->p_f_chain )
 659         filter_chain_Delete( id->p_f_chain );
 660     if( id->p_uf_chain )
 661         filter_chain_Delete( id->p_uf_chain );
 662 }
 663
 664 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 )
 665 {
 666
 667     picture_t *p_pic2 = NULL;
 668     bool b_need_duplicate=false;
 669     /* If input pts + input_frame_interval is lower than next_output_pts - output_frame_interval
 670      * Then the future input frame should fit better and we can drop this one
 671      *
 672      * Duplication need is checked in OutputFrame */
 673     if( ( p_pic->date + (mtime_t)id->i_input_frame_interval ) <
 674         ( date_Get( &id->next_output_pts ) ) )
 675     {
 676 #if 0
 677         msg_Dbg( p_stream, "dropping frame (%"PRId64" + %"PRId64" vs %"PRId64")",
 678                  p_pic->date, id->i_input_frame_interval, date_Get(&id->next_output_pts) );
 679 #endif
 680         picture_Release( p_pic );
 681         return;
 682     }
 683
 684     /*
 685      * Encoding
 686      */
 687     /* Check if we have a subpicture to overlay */
 688     if( p_sys->p_spu )
 689     {
 690         video_format_t fmt = id->p_encoder->fmt_in.video;
 691         if( fmt.i_visible_width <= 0 || fmt.i_visible_height <= 0 )
 692         {
 693             fmt.i_visible_width  = fmt.i_width;
 694             fmt.i_visible_height = fmt.i_height;
 695             fmt.i_x_offset       = 0;
 696             fmt.i_y_offset       = 0;
 697         }
 698
 699         subpicture_t *p_subpic = spu_Render( p_sys->p_spu, NULL, &fmt, &fmt,
 700                                              p_pic->date, p_pic->date, false );
 701
 702         /* Overlay subpicture */
 703         if( p_subpic )
 704         {
 705             if( picture_IsReferenced( p_pic ) && !filter_chain_GetLength( id->p_f_chain ) )
 706             {
 707                 /* We can't modify the picture, we need to duplicate it,
 708                  * in this point the picture is already p_encoder->fmt.in format*/
 709                 picture_t *p_tmp = video_new_buffer_encoder( id->p_encoder );
 710                 if( likely( p_tmp ) )
 711                 {
 712                     picture_Copy( p_tmp, p_pic );
 713                     picture_Release( p_pic );
 714                     p_pic = p_tmp;
 715                 }
 716             }
 717             if( unlikely( !p_sys->p_spu_blend ) )
 718                 p_sys->p_spu_blend = filter_NewBlend( VLC_OBJECT( p_sys->p_spu ), &fmt );
 719             if( likely( p_sys->p_spu_blend ) )
 720                 picture_BlendSubpicture( p_pic, p_sys->p_spu_blend, p_subpic );
 721             subpicture_Delete( p_subpic );
 722         }
 723     }
 724     /*This pts is handled, increase clock to next one*/
 725     date_Increment( &id->next_output_pts, id->p_encoder->fmt_in.video.i_frame_rate_base );
 726
 727     if( p_sys->i_threads == 0 )
 728     {
 729         block_t *p_block;
 730
 731         p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
 732         block_ChainAppend( out, p_block );
 733     }
 734
 735     /* we need to duplicate while next_output_pts + output_frame_interval < input_pts (next input pts)*/
 736     b_need_duplicate = ( date_Get( &id->next_output_pts ) + id->i_output_frame_interval ) <
 737                        ( date_Get( &id->interpolated_pts ) );
 738
 739     if( p_sys->i_threads )
 740     {
 741         if( p_sys->b_master_sync )
 742         {
 743             p_pic2 = video_new_buffer_encoder( id->p_encoder );
 744             if( likely( p_pic2 != NULL ) )
 745                 picture_Copy( p_pic2, p_pic );
 746         }
 747         vlc_mutex_lock( &p_sys->lock_out );
 748         picture_fifo_Push( p_sys->pp_pics, p_pic );
 749         vlc_cond_signal( &p_sys->cond );
 750         vlc_mutex_unlock( &p_sys->lock_out );
 751     }
 752
 753     while( (p_sys->b_master_sync && b_need_duplicate ))
 754     {
 755         if( p_sys->i_threads >= 1 )
 756         {
 757             picture_t *p_tmp = NULL;
 758             /* We can't modify the picture, we need to duplicate it */
 759             p_tmp = video_new_buffer_encoder( id->p_encoder );
 760             if( likely( p_tmp != NULL ) )
 761             {
 762                 picture_Copy( p_tmp, p_pic2 );
 763                 p_tmp->date = date_Get( &id->next_output_pts );
 764                 vlc_mutex_lock( &p_sys->lock_out );
 765                 picture_fifo_Push( p_sys->pp_pics, p_tmp );
 766                 vlc_cond_signal( &p_sys->cond );
 767                 vlc_mutex_unlock( &p_sys->lock_out );
 768             }
 769         }
 770         else
 771         {
 772             block_t *p_block;
 773             p_pic->date = date_Get( &id->next_output_pts );
 774             p_block = id->p_encoder->pf_encode_video(id->p_encoder, p_pic);
 775             block_ChainAppend( out, p_block );
 776         }
 777 #if 0
 778         msg_Dbg( p_stream, "duplicated frame");
 779 #endif
 780         date_Increment( &id->next_output_pts, id->p_encoder->fmt_in.video.i_frame_rate_base );
 781         b_need_duplicate = ( date_Get( &id->next_output_pts ) + id->i_output_frame_interval ) <
 782                            ( date_Get( &id->interpolated_pts ) );
 783     }
 784
 785     if( p_sys->i_threads && p_pic2 )
 786         picture_Release( p_pic2 );
 787     else if ( p_sys->i_threads == 0 )
 788         picture_Release( p_pic );
 789 }
 790
 791 int transcode_video_process( sout_stream_t *p_stream, sout_stream_id_t *id,
 792                                     block_t *in, block_t **out )
 793 {
 794     sout_stream_sys_t *p_sys = p_stream->p_sys;
 795     picture_t *p_pic = NULL;
 796     *out = NULL;
 797
 798     if( unlikely( in == NULL ) )
 799     {
 800         if( p_sys->i_threads == 0 )
 801         {
 802             block_t *p_block;
 803             do {
 804                 p_block = id->p_encoder->pf_encode_video(id->p_encoder, NULL );
 805                 block_ChainAppend( out, p_block );
 806             } while( p_block );
 807         }
 808         else
 809         {
 810             msg_Dbg( p_stream, "Flushing thread and waiting that");
 811             vlc_mutex_lock( &p_stream->p_sys->lock_out );
 812             p_stream->p_sys->b_abort = true;
 813             vlc_cond_signal( &p_stream->p_sys->cond );
 814             vlc_mutex_unlock( &p_stream->p_sys->lock_out );
 815
 816             vlc_join( p_stream->p_sys->thread, NULL );
 817             vlc_mutex_lock( &p_sys->lock_out );
 818             *out = p_sys->p_buffers;
 819             p_sys->p_buffers = NULL;
 820             vlc_mutex_unlock( &p_sys->lock_out );
 821
 822             msg_Dbg( p_stream, "Flushing done");
 823         }
 824         return VLC_SUCCESS;
 825     }
 826
 827
 828     while( (p_pic = id->p_decoder->pf_decode_video( id->p_decoder, &in )) )
 829     {
 830
 831         if( p_stream->p_sout->i_out_pace_nocontrol && p_sys->b_hurry_up )
 832         {
 833             mtime_t current_date = mdate();
 834             if( unlikely( (current_date - 50000) > p_pic->date ) )
 835             {
 836                 msg_Dbg( p_stream, "late picture skipped (%"PRId64")",
 837                          current_date - 50000 - p_pic->date );
 838                 picture_Release( p_pic );
 839                 continue;
 840             }
 841         }
 842
 843         if( unlikely (
 844              id->p_encoder->p_module &&
 845              !video_format_IsSimilar( &p_sys->fmt_input_video, &id->p_decoder->fmt_out.video )
 846             )
 847           )
 848         {
 849             msg_Info( p_stream, "aspect-ratio changed, reiniting. %i -> %i : %i -> %i.",
 850                         p_sys->fmt_input_video.i_sar_num, id->p_decoder->fmt_out.video.i_sar_num,
 851                         p_sys->fmt_input_video.i_sar_den, id->p_decoder->fmt_out.video.i_sar_den
 852                     );
 853             /* Close filters */
 854             if( id->p_f_chain )
 855                 filter_chain_Delete( id->p_f_chain );
 856             id->p_f_chain = NULL;
 857             if( id->p_uf_chain )
 858                 filter_chain_Delete( id->p_uf_chain );
 859             id->p_uf_chain = NULL;
 860
 861             /* Reinitialize filters */
 862             id->p_encoder->fmt_out.video.i_visible_width  = p_sys->i_width & ~1;
 863             id->p_encoder->fmt_out.video.i_visible_height = p_sys->i_height & ~1;
 864             id->p_encoder->fmt_out.video.i_sar_num = id->p_encoder->fmt_out.video.i_sar_den = 0;
 865
 866             transcode_video_filter_init( p_stream, id );
 867             transcode_video_encoder_init( p_stream, id );
 868             conversion_video_filter_append( id );
 869             memcpy( &p_sys->fmt_input_video, &id->p_decoder->fmt_out.video, sizeof(video_format_t));
 870         }
 871
 872
 873         if( unlikely( !id->p_encoder->p_module ) )
 874         {
 875             if( id->p_f_chain )
 876                 filter_chain_Delete( id->p_f_chain );
 877             if( id->p_uf_chain )
 878                 filter_chain_Delete( id->p_uf_chain );
 879             id->p_f_chain = id->p_uf_chain = NULL;
 880
 881             transcode_video_filter_init( p_stream, id );
 882             transcode_video_encoder_init( p_stream, id );
 883             conversion_video_filter_append( id );
 884             memcpy( &p_sys->fmt_input_video, &id->p_decoder->fmt_out.video, sizeof(video_format_t));
 885
 886             if( transcode_video_encoder_open( p_stream, id ) != VLC_SUCCESS )
 887             {
 888                 picture_Release( p_pic );
 889                 transcode_video_close( p_stream, id );
 890                 id->b_transcode = false;
 891                 return VLC_EGENERIC;
 892             }
 893         }
 894
 895         /*Input lipsync and drop check */
 896         if( p_sys->b_master_sync )
 897         {
 898             /* How much audio has drifted */
 899             mtime_t i_master_drift = p_sys->i_master_drift;
 900
 901             /* This is the pts input should have now with constant frame rate */
 902             mtime_t i_pts = date_Get( &id->interpolated_pts );
 903
 904             /* How much video pts is ahead of calculated pts */
 905             mtime_t i_video_drift = p_pic->date - i_pts;
 906
 907             /* Check that we are having lipsync with input here */
 908             if( unlikely ( ( (i_video_drift - i_master_drift ) > MASTER_SYNC_MAX_DRIFT
 909                           || (i_video_drift + i_master_drift ) < -MASTER_SYNC_MAX_DRIFT ) ) )
 910             {
 911                 msg_Warn( p_stream,
 912                     "video drift too big, resetting sync %"PRId64" to %"PRId64,
 913                     (i_video_drift + i_master_drift),
 914                     p_pic->date
 915                     );
 916                 date_Set( &id->interpolated_pts, p_pic->date );
 917                 date_Set( &id->next_output_pts, p_pic->date );
 918                 i_pts = date_Get( &id->interpolated_pts );
 919             }
 920
 921             /* Set the pts of the frame being encoded */
 922             p_pic->date = i_pts;
 923
 924             /* now take next input pts, pts dates are only enabled if p_module is set*/
 925             date_Increment( &id->interpolated_pts, id->p_decoder->fmt_out.video.i_frame_rate_base );
 926
 927
 928             /* If input pts + input_frame_interval is lower than next_output_pts - output_frame_interval
 929              * Then the future input frame should fit better and we can drop this one
 930              *
 931              * Duplication need is checked in OutputFrame */
 932             if( ( p_pic->date + (mtime_t)id->i_input_frame_interval ) <
 933                 ( date_Get( &id->next_output_pts ) ) )
 934             {
 935 #if 0
 936                 msg_Dbg( p_stream, "dropping frame (%"PRId64" + %"PRId64" vs %"PRId64")",
 937                          p_pic->date, id->i_input_frame_interval, date_Get(&id->next_output_pts) );
 938 #endif
 939                 picture_Release( p_pic );
 940                 continue;
 941             }
 942 #if 0
 943             msg_Dbg( p_stream, "not dropping frame");
 944 #endif
 945
 946             /* input calculated pts isn't necessary what pts output should be, so use output pts*/
 947             p_pic->date = date_Get( &id->next_output_pts );
 948
 949
 950         }
 951
 952         /* Run the filter and output chains; first with the picture,
 953          * and then with NULL as many times as we need until they
 954          * stop outputting frames.
 955          */
 956         for ( ;; ) {
 957             picture_t *p_filtered_pic = p_pic;
 958
 959             /* Run filter chain */
 960             if( id->p_f_chain )
 961                 p_filtered_pic = filter_chain_VideoFilter( id->p_f_chain, p_filtered_pic );
 962             if( !p_filtered_pic )
 963                 break;
 964
 965             for ( ;; ) {
 966                 picture_t *p_user_filtered_pic = p_filtered_pic;
 967
 968                 /* Run user specified filter chain */
 969                 if( id->p_uf_chain )
 970                     p_user_filtered_pic = filter_chain_VideoFilter( id->p_uf_chain, p_user_filtered_pic );
 971                 if( !p_user_filtered_pic )
 972                     break;
 973
 974                 OutputFrame( p_sys, p_user_filtered_pic, p_stream, id, out );
 975
 976                 p_filtered_pic = NULL;
 977             }
 978
 979             p_pic = NULL;
 980         }
 981     }
 982
 983     if( p_sys->i_threads >= 1 )
 984     {
 985         /* Pick up any return data the encoder thread wants to output. */
 986         vlc_mutex_lock( &p_sys->lock_out );
 987         *out = p_sys->p_buffers;
 988         p_sys->p_buffers = NULL;
 989         vlc_mutex_unlock( &p_sys->lock_out );
 990     }
 991
 992     return VLC_SUCCESS;
 993 }
 994
 995 bool transcode_video_add( sout_stream_t *p_stream, es_format_t *p_fmt,
 996                                 sout_stream_id_t *id )
 997 {
 998     sout_stream_sys_t *p_sys = p_stream->p_sys;
 999
1000     msg_Dbg( p_stream,
1001              "creating video transcoding from fcc=`%4.4s' to fcc=`%4.4s'",
1002              (char*)&p_fmt->i_codec, (char*)&p_sys->i_vcodec );
1003
1004     /* Complete destination format */
1005     id->p_encoder->fmt_out.i_codec = p_sys->i_vcodec;
1006     id->p_encoder->fmt_out.video.i_visible_width  = p_sys->i_width & ~1;
1007     id->p_encoder->fmt_out.video.i_visible_height = p_sys->i_height & ~1;
1008     id->p_encoder->fmt_out.i_bitrate = p_sys->i_vbitrate;
1009
1010     /* Build decoder -> filter -> encoder chain */
1011     if( transcode_video_new( p_stream, id ) )
1012     {
1013         msg_Err( p_stream, "cannot create video chain" );
1014         return false;
1015     }
1016
1017     /* Stream will be added later on because we don't know
1018      * all the characteristics of the decoded stream yet */
1019     id->b_transcode = true;
1020
1021     if( p_sys->f_fps > 0 )
1022     {
1023         id->p_encoder->fmt_out.video.i_frame_rate = (p_sys->f_fps * ENC_FRAMERATE_BASE);
1024         id->p_encoder->fmt_out.video.i_frame_rate_base = ENC_FRAMERATE_BASE;
1025     }
1026
1027     return true;
1028 }
1029