modules/stream_out/transcode/transcode.c

   1 /*****************************************************************************
   2  * transcode.c: transcoding stream output module
   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  *          Ilkka Ollakka <ileoo at videolan dot org>
  12  *
  13  * This program is free software; you can redistribute it and/or modify it
  14  * under the terms of the GNU Lesser General Public License as published by
  15  * the Free Software Foundation; either version 2.1 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  21  * GNU Lesser General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU Lesser General Public License
  24  * along with this program; if not, write to the Free Software Foundation,
  25  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  26  *****************************************************************************/
  27
  28 /*****************************************************************************
  29  * Preamble
  30  *****************************************************************************/
  31 #ifdef HAVE_CONFIG_H
  32 # include "config.h"
  33 #endif
  34
  35 #include <vlc_common.h>
  36 #include <vlc_plugin.h>
  37
  38 #include <vlc_spu.h>
  39
  40 #include "transcode.h"
  41
  42 /*****************************************************************************
  43  * Module descriptor
  44  *****************************************************************************/
  45 #define VENC_TEXT N_("Video encoder")
  46 #define VENC_LONGTEXT N_( \
  47     "This is the video encoder module that will be used (and its associated "\
  48     "options).")
  49 #define VCODEC_TEXT N_("Destination video codec")
  50 #define VCODEC_LONGTEXT N_( \
  51     "This is the video codec that will be used.")
  52 #define VB_TEXT N_("Video bitrate")
  53 #define VB_LONGTEXT N_( \
  54     "Target bitrate of the transcoded video stream." )
  55 #define SCALE_TEXT N_("Video scaling")
  56 #define SCALE_LONGTEXT N_( \
  57     "Scale factor to apply to the video while transcoding (eg: 0.25)")
  58 #define FPS_TEXT N_("Video frame-rate")
  59 #define FPS_LONGTEXT N_( \
  60     "Target output frame rate for the video stream." )
  61 #define DEINTERLACE_TEXT N_("Deinterlace video")
  62 #define DEINTERLACE_LONGTEXT N_( \
  63     "Deinterlace the video before encoding." )
  64 #define DEINTERLACE_MODULE_TEXT N_("Deinterlace module")
  65 #define DEINTERLACE_MODULE_LONGTEXT N_( \
  66     "Specify the deinterlace module to use." )
  67 #define WIDTH_TEXT N_("Video width")
  68 #define WIDTH_LONGTEXT N_( \
  69     "Output video width." )
  70 #define HEIGHT_TEXT N_("Video height")
  71 #define HEIGHT_LONGTEXT N_( \
  72     "Output video height." )
  73 #define MAXWIDTH_TEXT N_("Maximum video width")
  74 #define MAXWIDTH_LONGTEXT N_( \
  75     "Maximum output video width." )
  76 #define MAXHEIGHT_TEXT N_("Maximum video height")
  77 #define MAXHEIGHT_LONGTEXT N_( \
  78     "Maximum output video height." )
  79 #define VFILTER_TEXT N_("Video filter")
  80 #define VFILTER_LONGTEXT N_( \
  81     "Video filters will be applied to the video streams (after overlays " \
  82     "are applied). You can enter a colon-separated list of filters." )
  83
  84 #define AENC_TEXT N_("Audio encoder")
  85 #define AENC_LONGTEXT N_( \
  86     "This is the audio encoder module that will be used (and its associated "\
  87     "options).")
  88 #define ACODEC_TEXT N_("Destination audio codec")
  89 #define ACODEC_LONGTEXT N_( \
  90     "This is the audio codec that will be used.")
  91 #define AB_TEXT N_("Audio bitrate")
  92 #define AB_LONGTEXT N_( \
  93     "Target bitrate of the transcoded audio stream." )
  94 #define ARATE_TEXT N_("Audio sample rate")
  95 #define ARATE_LONGTEXT N_( \
  96  "Sample rate of the transcoded audio stream (11250, 22500, 44100 or 48000).")
  97 #define ALANG_TEXT N_("Audio language")
  98 #define ALANG_LONGTEXT N_( \
  99     "This is the language of the audio stream.")
 100 #define ACHANS_TEXT N_("Audio channels")
 101 #define ACHANS_LONGTEXT N_( \
 102     "Number of audio channels in the transcoded streams." )
 103 #define AFILTER_TEXT N_("Audio filter")
 104 #define AFILTER_LONGTEXT N_( \
 105     "Audio filters will be applied to the audio streams (after conversion " \
 106     "filters are applied). You can enter a colon-separated list of filters." )
 107
 108 #define SENC_TEXT N_("Subtitle encoder")
 109 #define SENC_LONGTEXT N_( \
 110     "This is the subtitle encoder module that will be used (and its " \
 111     "associated options)." )
 112 #define SCODEC_TEXT N_("Destination subtitle codec")
 113 #define SCODEC_LONGTEXT N_( \
 114     "This is the subtitle codec that will be used." )
 115
 116 #define SFILTER_TEXT N_("Overlays")
 117 #define SFILTER_LONGTEXT N_( \
 118     "This allows you to add overlays (also known as \"subpictures\" on the "\
 119     "transcoded video stream. The subpictures produced by the filters will "\
 120     "be overlayed directly onto the video. You can specify a colon-separated "\
 121     "list of subpicture modules" )
 122
 123 #define THREADS_TEXT N_("Number of threads")
 124 #define THREADS_LONGTEXT N_( \
 125     "Number of threads used for the transcoding." )
 126 #define HP_TEXT N_("High priority")
 127 #define HP_LONGTEXT N_( \
 128     "Runs the optional encoder thread at the OUTPUT priority instead of " \
 129     "VIDEO." )
 130 #define POOL_TEXT N_("Picture pool size")
 131 #define POOL_LONGTEXT N_( "Defines how many pictures we allow to be in pool "\
 132     "between decoder/encoder threads when threads > 0" )
 133
 134
 135 static const char *const ppsz_deinterlace_type[] =
 136 {
 137     "deinterlace", "ffmpeg-deinterlace"
 138 };
 139
 140 static int  Open ( vlc_object_t * );
 141 static void Close( vlc_object_t * );
 142
 143 #define SOUT_CFG_PREFIX "sout-transcode-"
 144
 145 vlc_module_begin ()
 146     set_shortname( N_("Transcode"))
 147     set_description( N_("Transcode stream output") )
 148     set_capability( "sout stream", 50 )
 149     add_shortcut( "transcode" )
 150     set_callbacks( Open, Close )
 151     set_category( CAT_SOUT )
 152     set_subcategory( SUBCAT_SOUT_STREAM )
 153     set_section( N_("Video"), NULL )
 154     add_module( SOUT_CFG_PREFIX "venc", "encoder", NULL, VENC_TEXT,
 155                 VENC_LONGTEXT, false )
 156     add_string( SOUT_CFG_PREFIX "vcodec", NULL, VCODEC_TEXT,
 157                 VCODEC_LONGTEXT, false )
 158     add_integer( SOUT_CFG_PREFIX "vb", 0, VB_TEXT,
 159                  VB_LONGTEXT, false )
 160     add_float( SOUT_CFG_PREFIX "scale", 0, SCALE_TEXT,
 161                SCALE_LONGTEXT, false )
 162     add_string( SOUT_CFG_PREFIX "fps", NULL, FPS_TEXT,
 163                FPS_LONGTEXT, false )
 164     add_obsolete_bool( SOUT_CFG_PREFIX "hurry-up"); /* Since 2.2.0 */
 165     add_bool( SOUT_CFG_PREFIX "deinterlace", false, DEINTERLACE_TEXT,
 166               DEINTERLACE_LONGTEXT, false )
 167     add_string( SOUT_CFG_PREFIX "deinterlace-module", "deinterlace",
 168                 DEINTERLACE_MODULE_TEXT, DEINTERLACE_MODULE_LONGTEXT,
 169                 false )
 170         change_string_list( ppsz_deinterlace_type, ppsz_deinterlace_type )
 171     add_integer( SOUT_CFG_PREFIX "width", 0, WIDTH_TEXT,
 172                  WIDTH_LONGTEXT, true )
 173     add_integer( SOUT_CFG_PREFIX "height", 0, HEIGHT_TEXT,
 174                  HEIGHT_LONGTEXT, true )
 175     add_integer( SOUT_CFG_PREFIX "maxwidth", 0, MAXWIDTH_TEXT,
 176                  MAXWIDTH_LONGTEXT, true )
 177     add_integer( SOUT_CFG_PREFIX "maxheight", 0, MAXHEIGHT_TEXT,
 178                  MAXHEIGHT_LONGTEXT, true )
 179     add_module_list( SOUT_CFG_PREFIX "vfilter", "video filter",
 180                      NULL, VFILTER_TEXT, VFILTER_LONGTEXT, false )
 181
 182     set_section( N_("Audio"), NULL )
 183     add_module( SOUT_CFG_PREFIX "aenc", "encoder", NULL, AENC_TEXT,
 184                 AENC_LONGTEXT, false )
 185     add_string( SOUT_CFG_PREFIX "acodec", NULL, ACODEC_TEXT,
 186                 ACODEC_LONGTEXT, false )
 187     add_integer( SOUT_CFG_PREFIX "ab", 96, AB_TEXT,
 188                  AB_LONGTEXT, false )
 189     add_string( SOUT_CFG_PREFIX "alang", NULL, ALANG_TEXT,
 190                 ALANG_LONGTEXT, true )
 191     add_integer( SOUT_CFG_PREFIX "channels", 0, ACHANS_TEXT,
 192                  ACHANS_LONGTEXT, false )
 193         change_integer_range( 0, 9 )
 194     add_integer( SOUT_CFG_PREFIX "samplerate", 0, ARATE_TEXT,
 195                  ARATE_LONGTEXT, true )
 196         change_integer_range( 0, 48000 )
 197     add_obsolete_bool( SOUT_CFG_PREFIX "audio-sync" ) /*Since 2.2.0 */
 198     add_module_list( SOUT_CFG_PREFIX "afilter",  "audio filter",
 199                      NULL, AFILTER_TEXT, AFILTER_LONGTEXT, false )
 200
 201     set_section( N_("Overlays/Subtitles"), NULL )
 202     add_module( SOUT_CFG_PREFIX "senc", "encoder", NULL, SENC_TEXT,
 203                 SENC_LONGTEXT, false )
 204     add_string( SOUT_CFG_PREFIX "scodec", NULL, SCODEC_TEXT,
 205                 SCODEC_LONGTEXT, false )
 206     add_bool( SOUT_CFG_PREFIX "soverlay", false, SCODEC_TEXT,
 207                SCODEC_LONGTEXT, false )
 208     add_module_list( SOUT_CFG_PREFIX "sfilter", "spu source",
 209                      NULL, SFILTER_TEXT, SFILTER_LONGTEXT, false )
 210
 211     set_section( N_("Miscellaneous"), NULL )
 212     add_integer( SOUT_CFG_PREFIX "threads", 0, THREADS_TEXT,
 213                  THREADS_LONGTEXT, true )
 214     add_integer( SOUT_CFG_PREFIX "pool-size", 10, POOL_TEXT, POOL_LONGTEXT, true )
 215         change_integer_range( 1, 1000 )
 216     add_bool( SOUT_CFG_PREFIX "high-priority", false, HP_TEXT, HP_LONGTEXT,
 217               true )
 218
 219 vlc_module_end ()
 220
 221 static const char *const ppsz_sout_options[] = {
 222     "venc", "vcodec", "vb",
 223     "scale", "fps", "width", "height", "vfilter", "deinterlace",
 224     "deinterlace-module", "threads", "aenc", "acodec", "ab", "alang",
 225     "afilter", "samplerate", "channels", "senc", "scodec", "soverlay",
 226     "sfilter", "high-priority", "maxwidth", "maxheight", "pool-size",
 227     NULL
 228 };
 229
 230 /*****************************************************************************
 231  * Exported prototypes
 232  *****************************************************************************/
 233 static sout_stream_id_sys_t *Add( sout_stream_t *, const es_format_t * );
 234 static void              Del ( sout_stream_t *, sout_stream_id_sys_t * );
 235 static int               Send( sout_stream_t *, sout_stream_id_sys_t *, block_t* );
 236
 237 /*****************************************************************************
 238  * Open:
 239  *****************************************************************************/
 240 static int Open( vlc_object_t *p_this )
 241 {
 242     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 243     sout_stream_sys_t *p_sys;
 244     char              *psz_string;
 245
 246     if( !p_stream->p_next )
 247     {
 248         msg_Err( p_stream, "cannot create chain" );
 249         return VLC_EGENERIC;
 250     }
 251     p_sys = calloc( 1, sizeof( *p_sys ) );
 252     p_sys->i_master_drift = 0;
 253
 254     config_ChainParse( p_stream, SOUT_CFG_PREFIX, ppsz_sout_options,
 255                    p_stream->p_cfg );
 256
 257     /* Audio transcoding parameters */
 258     psz_string = var_GetString( p_stream, SOUT_CFG_PREFIX "aenc" );
 259     p_sys->psz_aenc = NULL;
 260     p_sys->p_audio_cfg = NULL;
 261     if( psz_string && *psz_string )
 262     {
 263         char *psz_next;
 264         psz_next = config_ChainCreate( &p_sys->psz_aenc, &p_sys->p_audio_cfg,
 265                                        psz_string );
 266         free( psz_next );
 267     }
 268     free( psz_string );
 269
 270     psz_string = var_GetString( p_stream, SOUT_CFG_PREFIX "acodec" );
 271     p_sys->i_acodec = 0;
 272     if( psz_string && *psz_string )
 273     {
 274         char fcc[5] = "    \0";
 275         memcpy( fcc, psz_string, __MIN( strlen( psz_string ), 4 ) );
 276         p_sys->i_acodec = vlc_fourcc_GetCodecFromString( AUDIO_ES, fcc );
 277         msg_Dbg( p_stream, "Checking codec mapping for %s got %4.4s ", fcc, (char*)&p_sys->i_acodec);
 278     }
 279     free( psz_string );
 280
 281     p_sys->psz_alang = var_GetNonEmptyString( p_stream, SOUT_CFG_PREFIX "alang" );
 282
 283     p_sys->i_abitrate = var_GetInteger( p_stream, SOUT_CFG_PREFIX "ab" );
 284     if( p_sys->i_abitrate < 4000 ) p_sys->i_abitrate *= 1000;
 285
 286     p_sys->i_sample_rate = var_GetInteger( p_stream, SOUT_CFG_PREFIX "samplerate" );
 287
 288     p_sys->i_channels = var_GetInteger( p_stream, SOUT_CFG_PREFIX "channels" );
 289
 290     if( p_sys->i_acodec )
 291     {
 292         if( ( p_sys->i_acodec == VLC_CODEC_MP3 ||
 293               p_sys->i_acodec == VLC_CODEC_MP2 ||
 294               p_sys->i_acodec == VLC_CODEC_MPGA ) && p_sys->i_channels > 2 )
 295         {
 296             msg_Warn( p_stream, "%d channels invalid for mp2/mp3, forcing to 2",
 297                       p_sys->i_channels );
 298             p_sys->i_channels = 2;
 299         }
 300         msg_Dbg( p_stream, "codec audio=%4.4s %dHz %d channels %dKb/s",
 301                  (char *)&p_sys->i_acodec, p_sys->i_sample_rate,
 302                  p_sys->i_channels, p_sys->i_abitrate / 1000 );
 303     }
 304
 305     psz_string = var_GetString( p_stream, SOUT_CFG_PREFIX "afilter" );
 306     if( psz_string && *psz_string )
 307         p_sys->psz_af = strdup( psz_string );
 308     else
 309         p_sys->psz_af = NULL;
 310     free( psz_string );
 311
 312     /* Video transcoding parameters */
 313     psz_string = var_GetString( p_stream, SOUT_CFG_PREFIX "venc" );
 314     p_sys->psz_venc = NULL;
 315     p_sys->p_video_cfg = NULL;
 316     if( psz_string && *psz_string )
 317     {
 318         char *psz_next;
 319         psz_next = config_ChainCreate( &p_sys->psz_venc, &p_sys->p_video_cfg,
 320                                    psz_string );
 321         free( psz_next );
 322     }
 323     free( psz_string );
 324
 325     psz_string = var_GetString( p_stream, SOUT_CFG_PREFIX "vcodec" );
 326     p_sys->i_vcodec = 0;
 327     if( psz_string && *psz_string )
 328     {
 329         char fcc[5] = "    \0";
 330         memcpy( fcc, psz_string, __MIN( strlen( psz_string ), 4 ) );
 331         p_sys->i_vcodec = vlc_fourcc_GetCodecFromString( VIDEO_ES, fcc );
 332         msg_Dbg( p_stream, "Checking video codec mapping for %s got %4.4s ", fcc, (char*)&p_sys->i_vcodec);
 333     }
 334     free( psz_string );
 335
 336     p_sys->i_vbitrate = var_GetInteger( p_stream, SOUT_CFG_PREFIX "vb" );
 337     if( p_sys->i_vbitrate < 16000 ) p_sys->i_vbitrate *= 1000;
 338
 339     p_sys->f_scale = var_GetFloat( p_stream, SOUT_CFG_PREFIX "scale" );
 340
 341     p_sys->b_master_sync = var_InheritURational( p_stream, &p_sys->fps_num, &p_sys->fps_den, SOUT_CFG_PREFIX "fps" ) == VLC_SUCCESS;
 342
 343     p_sys->i_width = var_GetInteger( p_stream, SOUT_CFG_PREFIX "width" );
 344
 345     p_sys->i_height = var_GetInteger( p_stream, SOUT_CFG_PREFIX "height" );
 346
 347     p_sys->i_maxwidth = var_GetInteger( p_stream, SOUT_CFG_PREFIX "maxwidth" );
 348
 349     p_sys->i_maxheight = var_GetInteger( p_stream, SOUT_CFG_PREFIX "maxheight" );
 350
 351     psz_string = var_GetString( p_stream, SOUT_CFG_PREFIX "vfilter" );
 352     if( psz_string && *psz_string )
 353         p_sys->psz_vf2 = strdup(psz_string );
 354     else
 355         p_sys->psz_vf2 = NULL;
 356     free( psz_string );
 357
 358     if( var_GetBool( p_stream, SOUT_CFG_PREFIX "deinterlace" ) )
 359         psz_string = var_GetString( p_stream,
 360                                     SOUT_CFG_PREFIX "deinterlace-module" );
 361     else
 362         psz_string = NULL;
 363
 364     free( config_ChainCreate( &p_sys->psz_deinterlace,
 365                               &p_sys->p_deinterlace_cfg, psz_string ) );
 366     free( psz_string );
 367
 368     p_sys->i_threads = var_GetInteger( p_stream, SOUT_CFG_PREFIX "threads" );
 369     p_sys->pool_size = var_GetInteger( p_stream, SOUT_CFG_PREFIX "pool-size" );
 370     p_sys->b_high_priority = var_GetBool( p_stream, SOUT_CFG_PREFIX "high-priority" );
 371
 372     if( p_sys->i_vcodec )
 373     {
 374         msg_Dbg( p_stream, "codec video=%4.4s %dx%d scaling: %f %dkb/s",
 375                  (char *)&p_sys->i_vcodec, p_sys->i_width, p_sys->i_height,
 376                  p_sys->f_scale, p_sys->i_vbitrate / 1000 );
 377     }
 378
 379     /* Subpictures transcoding parameters */
 380     p_sys->p_spu = NULL;
 381     p_sys->p_spu_blend = NULL;
 382     p_sys->psz_senc = NULL;
 383     p_sys->p_spu_cfg = NULL;
 384     p_sys->i_scodec = 0;
 385
 386     psz_string = var_GetString( p_stream, SOUT_CFG_PREFIX "senc" );
 387     if( psz_string && *psz_string )
 388     {
 389         char *psz_next;
 390         psz_next = config_ChainCreate( &p_sys->psz_senc, &p_sys->p_spu_cfg,
 391                                    psz_string );
 392         free( psz_next );
 393     }
 394     free( psz_string );
 395
 396     psz_string = var_GetString( p_stream, SOUT_CFG_PREFIX "scodec" );
 397     if( psz_string && *psz_string )
 398     {
 399         char fcc[5] = "    \0";
 400         memcpy( fcc, psz_string, __MIN( strlen( psz_string ), 4 ) );
 401         p_sys->i_scodec = vlc_fourcc_GetCodecFromString( SPU_ES, fcc );
 402         msg_Dbg( p_stream, "Checking spu codec mapping for %s got %4.4s ", fcc, (char*)&p_sys->i_scodec);
 403     }
 404     free( psz_string );
 405
 406     if( p_sys->i_scodec )
 407     {
 408         msg_Dbg( p_stream, "codec spu=%4.4s", (char *)&p_sys->i_scodec );
 409     }
 410
 411     p_sys->b_soverlay = var_GetBool( p_stream, SOUT_CFG_PREFIX "soverlay" );
 412
 413     psz_string = var_GetString( p_stream, SOUT_CFG_PREFIX "sfilter" );
 414     if( psz_string && *psz_string )
 415     {
 416         p_sys->p_spu = spu_Create( p_stream, NULL );
 417         if( p_sys->p_spu )
 418             spu_ChangeSources( p_sys->p_spu, psz_string );
 419     }
 420     free( psz_string );
 421
 422     p_stream->pf_add    = Add;
 423     p_stream->pf_del    = Del;
 424     p_stream->pf_send   = Send;
 425     p_stream->p_sys     = p_sys;
 426
 427     return VLC_SUCCESS;
 428 }
 429
 430 /*****************************************************************************
 431  * Close:
 432  *****************************************************************************/
 433 static void Close( vlc_object_t * p_this )
 434 {
 435     sout_stream_t       *p_stream = (sout_stream_t*)p_this;
 436     sout_stream_sys_t   *p_sys = p_stream->p_sys;
 437
 438     free( p_sys->psz_af );
 439
 440     config_ChainDestroy( p_sys->p_audio_cfg );
 441     free( p_sys->psz_aenc );
 442     free( p_sys->psz_alang );
 443
 444     free( p_sys->psz_vf2 );
 445
 446     config_ChainDestroy( p_sys->p_video_cfg );
 447     free( p_sys->psz_venc );
 448
 449     config_ChainDestroy( p_sys->p_deinterlace_cfg );
 450     free( p_sys->psz_deinterlace );
 451
 452     config_ChainDestroy( p_sys->p_spu_cfg );
 453     free( p_sys->psz_senc );
 454
 455     if( p_sys->p_spu ) spu_Destroy( p_sys->p_spu );
 456     if( p_sys->p_spu_blend ) filter_DeleteBlend( p_sys->p_spu_blend );
 457
 458     free( p_sys );
 459 }
 460
 461 static void DeleteSoutStreamID( sout_stream_id_sys_t *id )
 462 {
 463     if( id )
 464     {
 465         if( id->p_decoder )
 466         {
 467             es_format_Clean( &id->p_encoder->fmt_in );
 468             es_format_Clean( &id->p_encoder->fmt_out );
 469             vlc_object_release( id->p_decoder );
 470         }
 471
 472         if( id->p_encoder )
 473         {
 474             es_format_Clean( &id->p_encoder->fmt_in );
 475             es_format_Clean( &id->p_encoder->fmt_out );
 476             vlc_object_release( id->p_encoder );
 477         }
 478
 479         vlc_mutex_destroy(&id->fifo.lock);
 480         free( id );
 481     }
 482 }
 483
 484 static sout_stream_id_sys_t *Add( sout_stream_t *p_stream,
 485                                   const es_format_t *p_fmt )
 486 {
 487     sout_stream_sys_t *p_sys = p_stream->p_sys;
 488     sout_stream_id_sys_t *id;
 489
 490     id = calloc( 1, sizeof( sout_stream_id_sys_t ) );
 491     if( !id )
 492         goto error;
 493
 494     vlc_mutex_init(&id->fifo.lock);
 495     id->id = NULL;
 496     id->p_decoder = NULL;
 497     id->p_encoder = NULL;
 498
 499     /* Create decoder object */
 500     id->p_decoder = vlc_object_create( p_stream, sizeof( decoder_t ) );
 501     if( !id->p_decoder )
 502         goto error;
 503     id->p_decoder->p_module = NULL;
 504     es_format_Init( &id->p_decoder->fmt_out, p_fmt->i_cat, 0 );
 505     es_format_Copy( &id->p_decoder->fmt_in, p_fmt );
 506     id->p_decoder->b_frame_drop_allowed = false;
 507
 508     /* Create encoder object */
 509     id->p_encoder = sout_EncoderCreate( p_stream );
 510     if( !id->p_encoder )
 511         goto error;
 512     id->p_encoder->p_module = NULL;
 513
 514     /* Create destination format */
 515     es_format_Init( &id->p_encoder->fmt_in, p_fmt->i_cat, 0 );
 516     es_format_Init( &id->p_encoder->fmt_out, p_fmt->i_cat, 0 );
 517     id->p_encoder->fmt_out.i_id    = p_fmt->i_id;
 518     id->p_encoder->fmt_out.i_group = p_fmt->i_group;
 519
 520     if( p_sys->psz_alang )
 521         id->p_encoder->fmt_out.psz_language = strdup( p_sys->psz_alang );
 522     else if( p_fmt->psz_language )
 523         id->p_encoder->fmt_out.psz_language = strdup( p_fmt->psz_language );
 524
 525     bool success;
 526
 527     if( p_fmt->i_cat == AUDIO_ES && p_sys->i_acodec )
 528         success = transcode_audio_add(p_stream, p_fmt, id);
 529     else if( p_fmt->i_cat == VIDEO_ES && p_sys->i_vcodec )
 530         success = transcode_video_add(p_stream, p_fmt, id);
 531     else if( ( p_fmt->i_cat == SPU_ES ) &&
 532              ( p_sys->i_scodec || p_sys->b_soverlay ) )
 533         success = transcode_spu_add(p_stream, p_fmt, id);
 534     else
 535     {
 536         msg_Dbg( p_stream, "not transcoding a stream (fcc=`%4.4s')",
 537                  (char*)&p_fmt->i_codec );
 538         id->id = sout_StreamIdAdd( p_stream->p_next, p_fmt );
 539         id->b_transcode = false;
 540
 541         success = id->id;
 542     }
 543
 544     if(!success)
 545         goto error;
 546
 547     return id;
 548
 549 error:
 550     DeleteSoutStreamID( id );
 551     return NULL;
 552 }
 553
 554 static void Del( sout_stream_t *p_stream, sout_stream_id_sys_t *id )
 555 {
 556     if( id->b_transcode )
 557     {
 558         switch( id->p_decoder->fmt_in.i_cat )
 559         {
 560         case AUDIO_ES:
 561             Send( p_stream, id, NULL );
 562             transcode_audio_close( id );
 563             break;
 564         case VIDEO_ES:
 565             Send( p_stream, id, NULL );
 566             transcode_video_close( p_stream, id );
 567             break;
 568         case SPU_ES:
 569             transcode_spu_close( p_stream, id );
 570             break;
 571         }
 572     }
 573
 574     if( id->id ) sout_StreamIdDel( p_stream->p_next, id->id );
 575
 576     DeleteSoutStreamID( id );
 577 }
 578
 579 static int Send( sout_stream_t *p_stream, sout_stream_id_sys_t *id,
 580                  block_t *p_buffer )
 581 {
 582     block_t *p_out = NULL;
 583
 584     if( !id->b_transcode )
 585     {
 586         if( id->id )
 587             return sout_StreamIdSend( p_stream->p_next, id->id, p_buffer );
 588
 589         block_Release( p_buffer );
 590         return VLC_EGENERIC;
 591     }
 592
 593     switch( id->p_decoder->fmt_in.i_cat )
 594     {
 595     case AUDIO_ES:
 596         if( transcode_audio_process( p_stream, id, p_buffer, &p_out )
 597             != VLC_SUCCESS )
 598         {
 599             return VLC_EGENERIC;
 600         }
 601         break;
 602
 603     case VIDEO_ES:
 604         if( transcode_video_process( p_stream, id, p_buffer, &p_out )
 605             != VLC_SUCCESS )
 606         {
 607             return VLC_EGENERIC;
 608         }
 609         break;
 610
 611     case SPU_ES:
 612         if ( transcode_spu_process( p_stream, id, p_buffer, &p_out ) !=
 613             VLC_SUCCESS )
 614         {
 615             return VLC_EGENERIC;
 616         }
 617         break;
 618
 619     default:
 620         p_out = NULL;
 621         block_Release( p_buffer );
 622         break;
 623     }
 624
 625     if( p_out )
 626         return sout_StreamIdSend( p_stream->p_next, id->id, p_out );
 627     return VLC_SUCCESS;
 628 }