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

   1 /*****************************************************************************
   2  * transcode.c: transcoding stream output module
   3  *****************************************************************************
   4  * Copyright (C) 2003-2004 VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #include <vlc/vlc.h>
  32 #include <vlc/input.h>
  33 #include <vlc/sout.h>
  34 #include <vlc/vout.h>
  35 #include <vlc/decoder.h>
  36 #include "vlc_filter.h"
  37 #include "osd.h"
  38
  39 /*****************************************************************************
  40  * Module descriptor
  41  *****************************************************************************/
  42 #define VENC_TEXT N_("Video encoder")
  43 #define VENC_LONGTEXT N_( \
  44     "Allows you to specify the video encoder to use and its associated " \
  45     "options." )
  46 #define VCODEC_TEXT N_("Destination video codec")
  47 #define VCODEC_LONGTEXT N_( \
  48     "Allows you to specify the destination video codec used for the " \
  49     "streaming output." )
  50 #define VB_TEXT N_("Video bitrate")
  51 #define VB_LONGTEXT N_( \
  52     "Allows you to specify the video bitrate used for the streaming " \
  53     "output." )
  54 #define SCALE_TEXT N_("Video scaling")
  55 #define SCALE_LONGTEXT N_( \
  56     "Allows you to scale the video before encoding." )
  57 #define FPS_TEXT N_("Video frame-rate")
  58 #define FPS_LONGTEXT N_( \
  59     "Allows you to specify an output frame rate for the video." )
  60 #define DEINTERLACE_TEXT N_("Deinterlace video")
  61 #define DEINTERLACE_LONGTEXT N_( \
  62     "Allows you to deinterlace the video before encoding." )
  63 #define WIDTH_TEXT N_("Video width")
  64 #define WIDTH_LONGTEXT N_( \
  65     "Allows you to specify the output video width." )
  66 #define HEIGHT_TEXT N_("Video height")
  67 #define HEIGHT_LONGTEXT N_( \
  68     "Allows you to specify the output video height." )
  69
  70 #define CROPTOP_TEXT N_("Video crop top")
  71 #define CROPTOP_LONGTEXT N_( \
  72     "Allows you to specify the top coordinate for the video cropping." )
  73 #define CROPLEFT_TEXT N_("Video crop left")
  74 #define CROPLEFT_LONGTEXT N_( \
  75     "Allows you to specify the left coordinate for the video cropping." )
  76 #define CROPBOTTOM_TEXT N_("Video crop bottom")
  77 #define CROPBOTTOM_LONGTEXT N_( \
  78     "Allows you to specify the bottom coordinate for the video cropping." )
  79 #define CROPRIGHT_TEXT N_("Video crop right")
  80 #define CROPRIGHT_LONGTEXT N_( \
  81     "Allows you to specify the right coordinate for the video cropping." )
  82
  83 #define AENC_TEXT N_("Audio encoder")
  84 #define AENC_LONGTEXT N_( \
  85     "Allows you to specify the audio encoder to use and its associated " \
  86     "options." )
  87 #define ACODEC_TEXT N_("Destination audio codec")
  88 #define ACODEC_LONGTEXT N_( \
  89     "Allows you to specify the destination audio codec used for the " \
  90     "streaming output." )
  91 #define AB_TEXT N_("Audio bitrate")
  92 #define AB_LONGTEXT N_( \
  93     "Allows you to specify the audio bitrate used for the streaming " \
  94     "output." )
  95 #define ARATE_TEXT N_("Audio sample rate")
  96 #define ARATE_LONGTEXT N_( \
  97     "Allows you to specify the audio sample rate used for the streaming " \
  98     "output." )
  99 #define ACHANS_TEXT N_("Audio channels")
 100 #define ACHANS_LONGTEXT N_( \
 101     "Allows you to specify the number of audio channels used for the " \
 102     "streaming output." )
 103
 104 #define SENC_TEXT N_("Subtitles encoder")
 105 #define SENC_LONGTEXT N_( \
 106     "Allows you to specify the subtitles encoder to use and its associated " \
 107     "options." )
 108 #define SCODEC_TEXT N_("Destination subtitles codec")
 109 #define SCODEC_LONGTEXT N_( \
 110     "Allows you to specify the destination subtitles codec used for the " \
 111     "streaming output." )
 112
 113 #define THREADS_TEXT N_("Number of threads")
 114 #define THREADS_LONGTEXT N_( \
 115     "Allows you to specify the number of threads used for the transcoding." )
 116
 117 #define ASYNC_TEXT N_("Synchronise on audio track")
 118 #define ASYNC_LONGTEXT N_( \
 119     "This option will drop/duplicate video frames to synchronise the video " \
 120     "track on the audio track." )
 121
 122 static int  Open ( vlc_object_t * );
 123 static void Close( vlc_object_t * );
 124
 125 #define SOUT_CFG_PREFIX "sout-transcode-"
 126
 127 vlc_module_begin();
 128     set_description( _("Transcode stream output") );
 129     set_capability( "sout stream", 50 );
 130     add_shortcut( "transcode" );
 131     set_callbacks( Open, Close );
 132
 133     add_string( SOUT_CFG_PREFIX "venc", NULL, NULL, VENC_TEXT,
 134                 VENC_LONGTEXT, VLC_FALSE );
 135     add_string( SOUT_CFG_PREFIX "vcodec", NULL, NULL, VCODEC_TEXT,
 136                 VCODEC_LONGTEXT, VLC_FALSE );
 137     add_integer( SOUT_CFG_PREFIX "vb", 800 * 1000, NULL, VB_TEXT,
 138                  VB_LONGTEXT, VLC_FALSE );
 139     add_float( SOUT_CFG_PREFIX "scale", 1, NULL, SCALE_TEXT,
 140                SCALE_LONGTEXT, VLC_FALSE );
 141     add_float( SOUT_CFG_PREFIX "fps", 0, NULL, FPS_TEXT,
 142                FPS_LONGTEXT, VLC_FALSE );
 143     add_bool( SOUT_CFG_PREFIX "deinterlace", 0, NULL, DEINTERLACE_TEXT,
 144               DEINTERLACE_LONGTEXT, VLC_FALSE );
 145     add_integer( SOUT_CFG_PREFIX "width", 0, NULL, WIDTH_TEXT,
 146                  WIDTH_LONGTEXT, VLC_TRUE );
 147     add_integer( SOUT_CFG_PREFIX "height", 0, NULL, HEIGHT_TEXT,
 148                  HEIGHT_LONGTEXT, VLC_TRUE );
 149
 150     add_integer( SOUT_CFG_PREFIX "croptop", 0, NULL, CROPTOP_TEXT,
 151                  CROPTOP_LONGTEXT, VLC_TRUE );
 152     add_integer( SOUT_CFG_PREFIX "cropleft", 0, NULL, CROPLEFT_TEXT,
 153                  CROPLEFT_LONGTEXT, VLC_TRUE );
 154     add_integer( SOUT_CFG_PREFIX "cropbottom", 0, NULL, CROPBOTTOM_TEXT,
 155                  CROPBOTTOM_LONGTEXT, VLC_TRUE );
 156     add_integer( SOUT_CFG_PREFIX "cropright", 0, NULL, CROPRIGHT_TEXT,
 157                  CROPRIGHT_LONGTEXT, VLC_TRUE );
 158
 159     add_string( SOUT_CFG_PREFIX "aenc", NULL, NULL, AENC_TEXT,
 160                 AENC_LONGTEXT, VLC_FALSE );
 161     add_string( SOUT_CFG_PREFIX "acodec", NULL, NULL, ACODEC_TEXT,
 162                 ACODEC_LONGTEXT, VLC_FALSE );
 163     add_integer( SOUT_CFG_PREFIX "ab", 64000, NULL, AB_TEXT,
 164                  AB_LONGTEXT, VLC_FALSE );
 165     add_integer( SOUT_CFG_PREFIX "channels", 0, NULL, ACHANS_TEXT,
 166                  ACHANS_LONGTEXT, VLC_FALSE );
 167     add_integer( SOUT_CFG_PREFIX "samplerate", 0, NULL, ARATE_TEXT,
 168                  ARATE_LONGTEXT, VLC_TRUE );
 169
 170     add_string( SOUT_CFG_PREFIX "senc", NULL, NULL, SENC_TEXT,
 171                 SENC_LONGTEXT, VLC_FALSE );
 172     add_string( SOUT_CFG_PREFIX "scodec", NULL, NULL, SCODEC_TEXT,
 173                 SCODEC_LONGTEXT, VLC_FALSE );
 174     add_bool( SOUT_CFG_PREFIX "soverlay", 0, NULL, SCODEC_TEXT,
 175                SCODEC_LONGTEXT, VLC_FALSE );
 176
 177     add_integer( SOUT_CFG_PREFIX "threads", 0, NULL, THREADS_TEXT,
 178                  THREADS_LONGTEXT, VLC_TRUE );
 179
 180     add_bool( SOUT_CFG_PREFIX "audio-sync", 0, NULL, ASYNC_TEXT,
 181               ASYNC_LONGTEXT, VLC_FALSE );
 182 vlc_module_end();
 183
 184 static const char *ppsz_sout_options[] = {
 185     "venc", "vcodec", "vb", "croptop", "cropbottom", "cropleft", "cropright",
 186     "scale", "fps", "width", "height", "deinterlace", "threads",
 187     "aenc", "acodec", "ab", "samplerate", "channels",
 188     "senc", "scodec", "soverlay",
 189     "audio-sync", NULL
 190 };
 191
 192 /*****************************************************************************
 193  * Exported prototypes
 194  *****************************************************************************/
 195 static sout_stream_id_t *Add ( sout_stream_t *, es_format_t * );
 196 static int               Del ( sout_stream_t *, sout_stream_id_t * );
 197 static int               Send( sout_stream_t *, sout_stream_id_t *, block_t* );
 198
 199 static int  transcode_audio_new    ( sout_stream_t *, sout_stream_id_t * );
 200 static void transcode_audio_close  ( sout_stream_t *, sout_stream_id_t * );
 201 static int  transcode_audio_process( sout_stream_t *, sout_stream_id_t *,
 202                                      block_t *, block_t ** );
 203
 204 static aout_buffer_t *audio_new_buffer( decoder_t *, int );
 205 static void audio_del_buffer( decoder_t *, aout_buffer_t * );
 206
 207 static int  transcode_video_new    ( sout_stream_t *, sout_stream_id_t * );
 208 static void transcode_video_close  ( sout_stream_t *, sout_stream_id_t * );
 209 static int  transcode_video_encoder_open( sout_stream_t *, sout_stream_id_t *);
 210 static int  transcode_video_process( sout_stream_t *, sout_stream_id_t *,
 211                                      block_t *, block_t ** );
 212
 213 static picture_t *video_new_buffer( decoder_t * );
 214 static void video_del_buffer( decoder_t *, picture_t * );
 215 static void video_link_picture( decoder_t *, picture_t * );
 216 static void video_unlink_picture( decoder_t *, picture_t * );
 217
 218 static int  transcode_spu_new    ( sout_stream_t *, sout_stream_id_t * );
 219 static void transcode_spu_close  ( sout_stream_t *, sout_stream_id_t * );
 220 static int  transcode_spu_process( sout_stream_t *, sout_stream_id_t *,
 221                                    block_t *, block_t ** );
 222 static subpicture_t *transcode_spu_get( sout_stream_t *, sout_stream_id_t *,
 223                                         mtime_t );
 224
 225 static int  EncoderThread( struct sout_stream_sys_t * p_sys );
 226
 227 static int pi_channels_maps[6] =
 228 {
 229     0,
 230     AOUT_CHAN_CENTER,   AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
 231     AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
 232     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT
 233      | AOUT_CHAN_REARRIGHT,
 234     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 235      | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
 236 };
 237
 238 #define PICTURE_RING_SIZE 64
 239 #define SUBPICTURE_RING_SIZE 20
 240
 241 struct sout_stream_sys_t
 242 {
 243     VLC_COMMON_MEMBERS
 244
 245     sout_stream_t   *p_out;
 246     sout_stream_id_t *id_video;
 247     block_t         *p_buffers;
 248     vlc_mutex_t     lock_out;
 249     vlc_cond_t      cond;
 250     picture_t *     pp_pics[PICTURE_RING_SIZE];
 251     int             i_first_pic, i_last_pic;
 252
 253     /* Audio */
 254     vlc_fourcc_t    i_acodec;   /* codec audio (0 if not transcode) */
 255     char            *psz_aenc;
 256     sout_cfg_t      *p_audio_cfg;
 257     int             i_sample_rate;
 258     int             i_channels;
 259     int             i_abitrate;
 260
 261     /* Video */
 262     vlc_fourcc_t    i_vcodec;   /* codec video (0 if not transcode) */
 263     char            *psz_venc;
 264     sout_cfg_t      *p_video_cfg;
 265     int             i_vbitrate;
 266     double          f_scale;
 267     double          f_fps;
 268     int             i_width;
 269     int             i_height;
 270     vlc_bool_t      b_deinterlace;
 271     int             i_threads;
 272
 273     int             i_crop_top;
 274     int             i_crop_bottom;
 275     int             i_crop_right;
 276     int             i_crop_left;
 277
 278     /* SPU */
 279     vlc_fourcc_t    i_scodec;   /* codec spu (0 if not transcode) */
 280     char            *psz_senc;
 281     vlc_bool_t      b_soverlay;
 282     sout_cfg_t      *p_spu_cfg;
 283     subpicture_t    *pp_subpics[SUBPICTURE_RING_SIZE];
 284
 285     /* Filters */
 286     filter_t        *p_filter_blend;
 287
 288     /* Sync */
 289     vlc_bool_t      b_audio_sync;
 290     mtime_t         i_master_drift;
 291 };
 292
 293 /*****************************************************************************
 294  * Open:
 295  *****************************************************************************/
 296 static int Open( vlc_object_t *p_this )
 297 {
 298     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 299     sout_stream_sys_t *p_sys;
 300     vlc_value_t       val;
 301     int               i;
 302
 303     p_sys = vlc_object_create( p_this, sizeof( sout_stream_sys_t ) );
 304
 305     p_sys->p_out = sout_StreamNew( p_stream->p_sout, p_stream->psz_next );
 306     if( !p_sys->p_out )
 307     {
 308         msg_Err( p_stream, "cannot create chain" );
 309         free( p_sys );
 310         return VLC_EGENERIC;
 311     }
 312
 313     p_sys->i_master_drift = 0;
 314
 315     sout_CfgParse( p_stream, SOUT_CFG_PREFIX, ppsz_sout_options,
 316                    p_stream->p_cfg );
 317
 318     /* Audio transcoding parameters */
 319     var_Get( p_stream, SOUT_CFG_PREFIX "aenc", &val );
 320     p_sys->psz_aenc = NULL;
 321     p_sys->p_audio_cfg = NULL;
 322     if( val.psz_string && *val.psz_string )
 323     {
 324         char *psz_next;
 325         psz_next = sout_CfgCreate( &p_sys->psz_aenc, &p_sys->p_audio_cfg,
 326                                    val.psz_string );
 327         if( psz_next ) free( psz_next );
 328     }
 329     if( val.psz_string ) free( val.psz_string );
 330
 331     var_Get( p_stream, SOUT_CFG_PREFIX "acodec", &val );
 332     p_sys->i_acodec = 0;
 333     if( val.psz_string && *val.psz_string )
 334     {
 335         char fcc[4] = "    ";
 336         memcpy( fcc, val.psz_string, __MIN( strlen( val.psz_string ), 4 ) );
 337         p_sys->i_acodec = VLC_FOURCC( fcc[0], fcc[1], fcc[2], fcc[3] );
 338     }
 339     if( val.psz_string ) free( val.psz_string );
 340
 341     var_Get( p_stream, SOUT_CFG_PREFIX "ab", &val );
 342     p_sys->i_abitrate = val.i_int;
 343     if( p_sys->i_abitrate < 4000 ) p_sys->i_abitrate *= 1000;
 344
 345     var_Get( p_stream, SOUT_CFG_PREFIX "samplerate", &val );
 346     p_sys->i_sample_rate = val.i_int;
 347
 348     var_Get( p_stream, SOUT_CFG_PREFIX "channels", &val );
 349     p_sys->i_channels = val.i_int;
 350
 351     if( p_sys->i_acodec )
 352     {
 353         msg_Dbg( p_stream, "codec audio=%4.4s %dHz %d channels %dKb/s",
 354                  (char *)&p_sys->i_acodec, p_sys->i_sample_rate,
 355                  p_sys->i_channels, p_sys->i_abitrate / 1000 );
 356     }
 357
 358     /* Video transcoding parameters */
 359     var_Get( p_stream, SOUT_CFG_PREFIX "venc", &val );
 360     p_sys->psz_venc = NULL;
 361     p_sys->p_video_cfg = NULL;
 362     if( val.psz_string && *val.psz_string )
 363     {
 364         char *psz_next;
 365         psz_next = sout_CfgCreate( &p_sys->psz_venc, &p_sys->p_video_cfg,
 366                                    val.psz_string );
 367         if( psz_next ) free( psz_next );
 368     }
 369     if( val.psz_string ) free( val.psz_string );
 370
 371     var_Get( p_stream, SOUT_CFG_PREFIX "vcodec", &val );
 372     p_sys->i_vcodec = 0;
 373     if( val.psz_string && *val.psz_string )
 374     {
 375         char fcc[4] = "    ";
 376         memcpy( fcc, val.psz_string, __MIN( strlen( val.psz_string ), 4 ) );
 377         p_sys->i_vcodec = VLC_FOURCC( fcc[0], fcc[1], fcc[2], fcc[3] );
 378     }
 379     if( val.psz_string ) free( val.psz_string );
 380
 381     var_Get( p_stream, SOUT_CFG_PREFIX "vb", &val );
 382     p_sys->i_vbitrate = val.i_int;
 383     if( p_sys->i_vbitrate < 16000 ) p_sys->i_vbitrate *= 1000;
 384
 385     var_Get( p_stream, SOUT_CFG_PREFIX "scale", &val );
 386     p_sys->f_scale = val.f_float;
 387
 388     var_Get( p_stream, SOUT_CFG_PREFIX "fps", &val );
 389     p_sys->f_fps = val.f_float;
 390
 391     var_Get( p_stream, SOUT_CFG_PREFIX "width", &val );
 392     p_sys->i_width = val.i_int;
 393
 394     var_Get( p_stream, SOUT_CFG_PREFIX "height", &val );
 395     p_sys->i_height = val.i_int;
 396
 397     var_Get( p_stream, SOUT_CFG_PREFIX "deinterlace", &val );
 398     p_sys->b_deinterlace = val.b_bool;
 399
 400     var_Get( p_stream, SOUT_CFG_PREFIX "croptop", &val );
 401     p_sys->i_crop_top = val.i_int;
 402     var_Get( p_stream, SOUT_CFG_PREFIX "cropbottom", &val );
 403     p_sys->i_crop_bottom = val.i_int;
 404     var_Get( p_stream, SOUT_CFG_PREFIX "cropleft", &val );
 405     p_sys->i_crop_left = val.i_int;
 406     var_Get( p_stream, SOUT_CFG_PREFIX "cropright", &val );
 407     p_sys->i_crop_right = val.i_int;
 408
 409     var_Get( p_stream, SOUT_CFG_PREFIX "threads", &val );
 410     p_sys->i_threads = val.i_int;
 411
 412     if( p_sys->i_vcodec )
 413     {
 414         msg_Dbg( p_stream, "codec video=%4.4s %dx%d scaling: %f %dkb/s",
 415                  (char *)&p_sys->i_vcodec, p_sys->i_width, p_sys->i_height,
 416                  p_sys->f_scale, p_sys->i_vbitrate / 1000 );
 417     }
 418
 419     /* Subpictures transcoding parameters */
 420     var_Get( p_stream, SOUT_CFG_PREFIX "senc", &val );
 421     p_sys->psz_senc = NULL;
 422     p_sys->p_spu_cfg = NULL;
 423     if( val.psz_string && *val.psz_string )
 424     {
 425         char *psz_next;
 426         psz_next = sout_CfgCreate( &p_sys->psz_senc, &p_sys->p_spu_cfg,
 427                                    val.psz_string );
 428         if( psz_next ) free( psz_next );
 429     }
 430     if( val.psz_string ) free( val.psz_string );
 431
 432     var_Get( p_stream, SOUT_CFG_PREFIX "scodec", &val );
 433     p_sys->i_scodec = 0;
 434     if( val.psz_string && *val.psz_string )
 435     {
 436         char fcc[4] = "    ";
 437         memcpy( fcc, val.psz_string, __MIN( strlen( val.psz_string ), 4 ) );
 438         p_sys->i_scodec = VLC_FOURCC( fcc[0], fcc[1], fcc[2], fcc[3] );
 439     }
 440     if( val.psz_string ) free( val.psz_string );
 441
 442     if( p_sys->i_scodec )
 443     {
 444         msg_Dbg( p_stream, "codec spu=%4.4s", (char *)&p_sys->i_acodec );
 445     }
 446
 447     var_Get( p_stream, SOUT_CFG_PREFIX "soverlay", &val );
 448     p_sys->b_soverlay = val.b_bool;
 449     p_sys->p_filter_blend = 0;
 450
 451     for( i = 0; i < SUBPICTURE_RING_SIZE; i++ )
 452     {
 453         p_sys->pp_subpics[i] = 0;
 454     }
 455
 456     var_Get( p_stream, SOUT_CFG_PREFIX "audio-sync", &val );
 457     p_sys->b_audio_sync = val.b_bool;
 458     if( p_sys->f_fps > 0 ) p_sys->b_audio_sync = VLC_TRUE;
 459
 460     p_stream->pf_add    = Add;
 461     p_stream->pf_del    = Del;
 462     p_stream->pf_send   = Send;
 463     p_stream->p_sys     = p_sys;
 464
 465     return VLC_SUCCESS;
 466 }
 467
 468 /*****************************************************************************
 469  * Close:
 470  *****************************************************************************/
 471 static void Close( vlc_object_t * p_this )
 472 {
 473     sout_stream_t       *p_stream = (sout_stream_t*)p_this;
 474     sout_stream_sys_t   *p_sys = p_stream->p_sys;
 475
 476     sout_StreamDelete( p_sys->p_out );
 477
 478     while( p_sys->p_audio_cfg != NULL )
 479     {
 480         sout_cfg_t *p_next = p_sys->p_audio_cfg->p_next;
 481
 482         if( p_sys->p_audio_cfg->psz_name )
 483             free( p_sys->p_audio_cfg->psz_name );
 484         if( p_sys->p_audio_cfg->psz_value )
 485             free( p_sys->p_audio_cfg->psz_value );
 486         free( p_sys->p_audio_cfg );
 487
 488         p_sys->p_audio_cfg = p_next;
 489     }
 490     if( p_sys->psz_aenc ) free( p_sys->psz_aenc );
 491
 492     while( p_sys->p_video_cfg != NULL )
 493     {
 494         sout_cfg_t *p_next = p_sys->p_video_cfg->p_next;
 495
 496         if( p_sys->p_video_cfg->psz_name )
 497             free( p_sys->p_video_cfg->psz_name );
 498         if( p_sys->p_video_cfg->psz_value )
 499             free( p_sys->p_video_cfg->psz_value );
 500         free( p_sys->p_video_cfg );
 501
 502         p_sys->p_video_cfg = p_next;
 503     }
 504     if( p_sys->psz_venc ) free( p_sys->psz_venc );
 505
 506     while( p_sys->p_spu_cfg != NULL )
 507     {
 508         sout_cfg_t *p_next = p_sys->p_spu_cfg->p_next;
 509
 510         if( p_sys->p_spu_cfg->psz_name )
 511             free( p_sys->p_spu_cfg->psz_name );
 512         if( p_sys->p_spu_cfg->psz_value )
 513             free( p_sys->p_spu_cfg->psz_value );
 514         free( p_sys->p_spu_cfg );
 515
 516         p_sys->p_spu_cfg = p_next;
 517     }
 518     if( p_sys->psz_senc ) free( p_sys->psz_senc );
 519
 520     if( p_sys->p_filter_blend )
 521     {
 522         if( p_sys->p_filter_blend->p_module )
 523             module_Unneed( p_sys->p_filter_blend,
 524                            p_sys->p_filter_blend->p_module );
 525
 526         vlc_object_detach( p_sys->p_filter_blend );
 527         vlc_object_destroy( p_sys->p_filter_blend );
 528     }
 529
 530     vlc_object_destroy( p_sys );
 531 }
 532
 533 struct sout_stream_id_t
 534 {
 535     vlc_fourcc_t  b_transcode;
 536
 537     /* id of the out stream */
 538     void *id;
 539
 540     /* Decoder */
 541     decoder_t       *p_decoder;
 542
 543     /* Filters */
 544     filter_t        *pp_filter[10];
 545     int             i_filter;
 546
 547     /* Encoder */
 548     encoder_t       *p_encoder;
 549
 550     /* Sync */
 551     date_t          interpolated_pts;
 552     mtime_t         i_initial_pts;
 553 };
 554
 555
 556 static sout_stream_id_t *Add( sout_stream_t *p_stream, es_format_t *p_fmt )
 557 {
 558     sout_stream_sys_t *p_sys = p_stream->p_sys;
 559     sout_stream_id_t *id;
 560
 561     id = malloc( sizeof( sout_stream_id_t ) );
 562     memset( id, 0, sizeof(sout_stream_id_t) );
 563
 564     id->id = NULL;
 565     id->p_decoder = NULL;
 566     id->p_encoder = NULL;
 567
 568     /* Create decoder object */
 569     id->p_decoder = vlc_object_create( p_stream, VLC_OBJECT_DECODER );
 570     if( !id->p_decoder )
 571     {
 572         msg_Err( p_stream, "out of memory" );
 573         goto error;
 574     }
 575     vlc_object_attach( id->p_decoder, p_stream );
 576     id->p_decoder->p_module = NULL;
 577     id->p_decoder->fmt_in = *p_fmt;
 578     id->p_decoder->fmt_out = *p_fmt;
 579     id->p_decoder->fmt_out.i_extra = 0;
 580     id->p_decoder->fmt_out.p_extra = 0;
 581     id->p_decoder->b_pace_control = VLC_TRUE;
 582
 583     /* Create encoder object */
 584     id->p_encoder = vlc_object_create( p_stream, VLC_OBJECT_ENCODER );
 585     if( !id->p_encoder )
 586     {
 587         msg_Err( p_stream, "out of memory" );
 588         goto error;
 589     }
 590     vlc_object_attach( id->p_encoder, p_stream );
 591     id->p_encoder->p_module = NULL;
 592
 593     /* Create destination format */
 594     es_format_Init( &id->p_encoder->fmt_out, p_fmt->i_cat, 0 );
 595     id->p_encoder->fmt_out.i_id    = p_fmt->i_id;
 596     id->p_encoder->fmt_out.i_group = p_fmt->i_group;
 597     if( p_fmt->psz_language )
 598         id->p_encoder->fmt_out.psz_language = strdup( p_fmt->psz_language );
 599
 600     if( p_fmt->i_cat == AUDIO_ES && (p_sys->i_acodec || p_sys->psz_aenc) )
 601     {
 602         msg_Dbg( p_stream,
 603                  "creating audio transcoding from fcc=`%4.4s' to fcc=`%4.4s'",
 604                  (char*)&p_fmt->i_codec, (char*)&p_sys->i_acodec );
 605
 606         /* Complete destination format */
 607         id->p_encoder->fmt_out.i_codec = p_sys->i_acodec;
 608         id->p_encoder->fmt_out.audio.i_rate = p_sys->i_sample_rate > 0 ?
 609             p_sys->i_sample_rate : (int)p_fmt->audio.i_rate;
 610         id->p_encoder->fmt_out.audio.i_channels = p_sys->i_channels > 0 ?
 611             p_sys->i_channels : p_fmt->audio.i_channels;
 612         id->p_encoder->fmt_out.i_bitrate = p_sys->i_abitrate;
 613         id->p_encoder->fmt_out.audio.i_bitspersample =
 614             p_fmt->audio.i_bitspersample;
 615
 616         /* Build decoder -> filter -> encoder chain */
 617         if( transcode_audio_new( p_stream, id ) )
 618         {
 619             msg_Err( p_stream, "cannot create audio chain" );
 620             goto error;
 621         }
 622
 623         /* Open output stream */
 624         id->id = p_sys->p_out->pf_add( p_sys->p_out, &id->p_encoder->fmt_out );
 625         id->b_transcode = VLC_TRUE;
 626
 627         if( !id->id ) goto error;
 628
 629         date_Init( &id->interpolated_pts, p_fmt->audio.i_rate, 1 );
 630     }
 631     else if( p_fmt->i_cat == VIDEO_ES &&
 632              (p_sys->i_vcodec != 0 || p_sys->psz_venc) )
 633     {
 634         msg_Dbg( p_stream,
 635                  "creating video transcoding from fcc=`%4.4s' to fcc=`%4.4s'",
 636                  (char*)&p_fmt->i_codec, (char*)&p_sys->i_vcodec );
 637
 638         /* Complete destination format */
 639         id->p_encoder->fmt_out.i_codec = p_sys->i_vcodec;
 640         id->p_encoder->fmt_out.video.i_width  = p_sys->i_width;
 641         id->p_encoder->fmt_out.video.i_height = p_sys->i_height;
 642         id->p_encoder->fmt_out.i_bitrate = p_sys->i_vbitrate;
 643
 644         /* Build decoder -> filter -> encoder chain */
 645         if( transcode_video_new( p_stream, id ) )
 646         {
 647             msg_Err( p_stream, "cannot create video chain" );
 648             goto error;
 649         }
 650
 651         /* Stream will be added later on because we don't know
 652          * all the characteristics of the decoded stream yet */
 653         id->b_transcode = VLC_TRUE;
 654
 655         if( p_sys->f_fps > 0 )
 656         {
 657             id->p_encoder->fmt_out.video.i_frame_rate = p_sys->f_fps * 1000;
 658             id->p_encoder->fmt_out.video.i_frame_rate_base = 1000;
 659         }
 660     }
 661     else if( p_fmt->i_cat == SPU_ES && (p_sys->i_scodec || p_sys->psz_senc) )
 662     {
 663         msg_Dbg( p_stream, "creating subtitles transcoding from fcc=`%4.4s' "
 664                  "to fcc=`%4.4s'", (char*)&p_fmt->i_codec,
 665                  (char*)&p_sys->i_scodec );
 666
 667         /* Complete destination format */
 668         id->p_encoder->fmt_out.i_codec = p_sys->i_scodec;
 669
 670         /* build decoder -> filter -> encoder */
 671         if( transcode_spu_new( p_stream, id ) )
 672         {
 673             msg_Err( p_stream, "cannot create subtitles chain" );
 674             goto error;
 675         }
 676
 677         /* open output stream */
 678         id->id = p_sys->p_out->pf_add( p_sys->p_out, &id->p_encoder->fmt_out );
 679         id->b_transcode = VLC_TRUE;
 680
 681         if( !id->id ) goto error;
 682     }
 683     else if( p_fmt->i_cat == SPU_ES && p_sys->b_soverlay )
 684     {
 685         msg_Dbg( p_stream, "subtitles (fcc=`%4.4s') overlaying",
 686                  (char*)&p_fmt->i_codec );
 687
 688         id->b_transcode = VLC_TRUE;
 689
 690         /* Build decoder -> filter -> overlaying chain */
 691         if( transcode_spu_new( p_stream, id ) )
 692         {
 693             msg_Err( p_stream, "cannot create subtitles chain" );
 694             goto error;
 695         }
 696     }
 697     else
 698     {
 699         msg_Dbg( p_stream, "not transcoding a stream (fcc=`%4.4s')",
 700                  (char*)&p_fmt->i_codec );
 701         id->id = p_sys->p_out->pf_add( p_sys->p_out, p_fmt );
 702         id->b_transcode = VLC_FALSE;
 703
 704         if( !id->id ) goto error;
 705     }
 706
 707     return id;
 708
 709  error:
 710     if( id->p_decoder )
 711     {
 712         vlc_object_detach( id->p_decoder );
 713         vlc_object_destroy( id->p_decoder );
 714     }
 715
 716     if( id->p_encoder )
 717     {
 718         vlc_object_detach( id->p_encoder );
 719         vlc_object_destroy( id->p_encoder );
 720     }
 721
 722     free( id );
 723     return NULL;
 724 }
 725
 726 static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
 727 {
 728     sout_stream_sys_t *p_sys = p_stream->p_sys;
 729
 730     if( id->b_transcode )
 731     {
 732         switch( id->p_decoder->fmt_in.i_cat )
 733         {
 734         case AUDIO_ES:
 735             transcode_audio_close( p_stream, id );
 736             break;
 737         case VIDEO_ES:
 738             transcode_video_close( p_stream, id );
 739             break;
 740         case SPU_ES:
 741             transcode_spu_close( p_stream, id );
 742             break;
 743         }
 744     }
 745
 746     if( id->id ) p_sys->p_out->pf_del( p_sys->p_out, id->id );
 747
 748     if( id->p_decoder )
 749     {
 750         vlc_object_detach( id->p_decoder );
 751         vlc_object_destroy( id->p_decoder );
 752     }
 753
 754     if( id->p_encoder )
 755     {
 756         vlc_object_detach( id->p_encoder );
 757         vlc_object_destroy( id->p_encoder );
 758     }
 759
 760     free( id );
 761
 762     return VLC_SUCCESS;
 763 }
 764
 765 static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
 766                  block_t *p_buffer )
 767 {
 768     sout_stream_sys_t *p_sys = p_stream->p_sys;
 769     block_t *p_out;
 770
 771     if( !id->b_transcode && id->id )
 772     {
 773         return p_sys->p_out->pf_send( p_sys->p_out, id->id, p_buffer );
 774     }
 775     else if( !id->b_transcode )
 776     {
 777         block_Release( p_buffer );
 778         return VLC_EGENERIC;
 779     }
 780
 781     switch( id->p_decoder->fmt_in.i_cat )
 782     {
 783     case AUDIO_ES:
 784         transcode_audio_process( p_stream, id, p_buffer, &p_out );
 785         break;
 786
 787     case VIDEO_ES:
 788         if( transcode_video_process( p_stream, id, p_buffer, &p_out )
 789             != VLC_SUCCESS )
 790         {
 791             return VLC_EGENERIC;
 792         }
 793         break;
 794
 795     case SPU_ES:
 796         if( transcode_spu_process( p_stream, id, p_buffer, &p_out ) !=
 797             VLC_SUCCESS )
 798         {
 799             return VLC_EGENERIC;
 800         }
 801         break;
 802
 803     default:
 804         block_Release( p_buffer );
 805         break;
 806     }
 807
 808     if( p_out ) return p_sys->p_out->pf_send( p_sys->p_out, id->id, p_out );
 809     return VLC_SUCCESS;
 810 }
 811
 812 /****************************************************************************
 813  * decoder reencoder part
 814  ****************************************************************************/
 815 int audio_BitsPerSample( vlc_fourcc_t i_format )
 816 {
 817     switch( i_format )
 818     {
 819     case VLC_FOURCC('u','8',' ',' '):
 820     case VLC_FOURCC('s','8',' ',' '):
 821         return 1;
 822
 823     case VLC_FOURCC('u','1','6','l'):
 824     case VLC_FOURCC('s','1','6','l'):
 825     case VLC_FOURCC('u','1','6','b'):
 826     case VLC_FOURCC('s','1','6','b'):
 827         return 2;
 828
 829     case VLC_FOURCC('f','l','3','2'):
 830     case VLC_FOURCC('f','i','3','2'):
 831         return 4;
 832     }
 833
 834     return 0;
 835 }
 836
 837 static int transcode_audio_new( sout_stream_t *p_stream,
 838                                 sout_stream_id_t *id )
 839 {
 840     sout_stream_sys_t *p_sys = p_stream->p_sys;
 841
 842     /*
 843      * Open decoder
 844      */
 845
 846     /* Initialization of decoder structures */
 847     id->p_decoder->pf_decode_audio = 0;
 848     id->p_decoder->pf_aout_buffer_new = audio_new_buffer;
 849     id->p_decoder->pf_aout_buffer_del = audio_del_buffer;
 850     //id->p_decoder->p_cfg = p_sys->p_video_cfg;
 851
 852     id->p_decoder->p_module =
 853         module_Need( id->p_decoder, "decoder", "$codec", 0 );
 854
 855     if( !id->p_decoder->p_module )
 856     {
 857         msg_Err( p_stream, "cannot find decoder" );
 858         return VLC_EGENERIC;
 859     }
 860     id->p_decoder->fmt_out.audio.i_bitspersample =
 861         audio_BitsPerSample( id->p_decoder->fmt_out.i_codec );
 862
 863     /*
 864      * Open encoder
 865      */
 866
 867     /* Initialization of encoder format structures */
 868     es_format_Init( &id->p_encoder->fmt_in, id->p_decoder->fmt_in.i_cat,
 869                     id->p_decoder->fmt_out.i_codec );
 870     id->p_encoder->fmt_in.audio.i_format = id->p_decoder->fmt_out.i_codec;
 871
 872     /* Sanity check for audio channels */
 873     id->p_encoder->fmt_out.audio.i_channels =
 874         __MIN( id->p_encoder->fmt_out.audio.i_channels,
 875                id->p_decoder->fmt_in.audio.i_channels );
 876     id->p_encoder->fmt_out.audio.i_physical_channels =
 877         id->p_encoder->fmt_out.audio.i_original_channels =
 878             pi_channels_maps[id->p_encoder->fmt_out.audio.i_channels];
 879
 880     /* Initialization of encoder format structures */
 881     es_format_Init( &id->p_encoder->fmt_in, AUDIO_ES, AOUT_FMT_S16_NE );
 882     id->p_encoder->fmt_in.audio.i_format = AOUT_FMT_S16_NE;
 883     id->p_encoder->fmt_in.audio.i_rate = id->p_encoder->fmt_out.audio.i_rate;
 884     id->p_encoder->fmt_in.audio.i_physical_channels =
 885         id->p_encoder->fmt_in.audio.i_original_channels =
 886             pi_channels_maps[id->p_encoder->fmt_out.audio.i_channels];
 887     id->p_encoder->fmt_in.audio.i_channels =
 888         id->p_encoder->fmt_out.audio.i_channels;
 889     id->p_encoder->fmt_in.audio.i_bitspersample = 16;
 890
 891     id->p_encoder->p_cfg = p_stream->p_sys->p_audio_cfg;
 892
 893     id->p_encoder->p_module =
 894         module_Need( id->p_encoder, "encoder", p_sys->psz_aenc, VLC_TRUE );
 895     if( !id->p_encoder->p_module )
 896     {
 897         msg_Err( p_stream, "cannot find encoder" );
 898         module_Unneed( id->p_decoder, id->p_decoder->p_module );
 899         id->p_decoder->p_module = 0;
 900         return VLC_EGENERIC;
 901     }
 902     id->p_encoder->fmt_in.audio.i_format = id->p_encoder->fmt_in.audio.i_codec;
 903
 904     /* Check if we need a filter for chroma conversion or resizing */
 905     if( id->p_decoder->fmt_out.i_codec !=
 906         id->p_encoder->fmt_in.i_codec )
 907     {
 908         id->pp_filter[0] =
 909             vlc_object_create( p_stream, VLC_OBJECT_FILTER );
 910         vlc_object_attach( id->pp_filter[0], p_stream );
 911
 912         id->pp_filter[0]->pf_audio_buffer_new = __block_New;
 913
 914         id->pp_filter[0]->fmt_in = id->p_decoder->fmt_out;
 915         id->pp_filter[0]->fmt_out = id->p_encoder->fmt_in;
 916         id->pp_filter[0]->p_module =
 917             module_Need( id->pp_filter[0], "audio filter2", 0, 0 );
 918         if( id->pp_filter[0]->p_module ) id->i_filter++;
 919         else
 920         {
 921             msg_Dbg( p_stream, "no audio filter found" );
 922             vlc_object_detach( id->pp_filter[0] );
 923             vlc_object_destroy( id->pp_filter[0] );
 924             module_Unneed( id->p_decoder, id->p_decoder->p_module );
 925             id->p_decoder->p_module = 0;
 926             module_Unneed( id->p_encoder, id->p_encoder->p_module );
 927             id->p_encoder->p_module = 0;
 928             return VLC_EGENERIC;
 929         }
 930
 931         /* Try a 2 stage conversion */
 932         if( id->pp_filter[0]->fmt_out.i_codec !=
 933             id->p_encoder->fmt_in.i_codec )
 934         {
 935             id->pp_filter[1] =
 936                 vlc_object_create( p_stream, VLC_OBJECT_FILTER );
 937             vlc_object_attach( id->pp_filter[1], p_stream );
 938
 939             id->pp_filter[1]->pf_audio_buffer_new = __block_New;
 940
 941             id->pp_filter[1]->fmt_in = id->pp_filter[0]->fmt_out;
 942             id->pp_filter[1]->fmt_out = id->p_encoder->fmt_in;
 943             id->pp_filter[1]->p_module =
 944               module_Need( id->pp_filter[1], "audio filter2", 0, 0 );
 945             if( !id->pp_filter[1]->p_module ||
 946                 id->pp_filter[1]->fmt_out.i_codec !=
 947                   id->p_encoder->fmt_in.i_codec )
 948             {
 949                 msg_Dbg( p_stream, "no audio filter found" );
 950                 module_Unneed( id->pp_filter[0], id->pp_filter[0]->p_module );
 951                 vlc_object_detach( id->pp_filter[0] );
 952                 vlc_object_destroy( id->pp_filter[0] );
 953                 if( id->pp_filter[1]->p_module )
 954                 module_Unneed( id->pp_filter[0], id->pp_filter[0]->p_module );
 955                 vlc_object_detach( id->pp_filter[1] );
 956                 vlc_object_destroy( id->pp_filter[1] );
 957                 module_Unneed( id->p_decoder, id->p_decoder->p_module );
 958                 id->p_decoder->p_module = 0;
 959                 module_Unneed( id->p_encoder, id->p_encoder->p_module );
 960                 id->p_encoder->p_module = 0;
 961                 return VLC_EGENERIC;
 962             }
 963             else id->i_filter++;
 964         }
 965     }
 966
 967     /* FIXME: Hack for mp3 transcoding support */
 968     if( id->p_encoder->fmt_out.i_codec == VLC_FOURCC( 'm','p','3',' ' ) )
 969         id->p_encoder->fmt_out.i_codec = VLC_FOURCC( 'm','p','g','a' );
 970
 971     return VLC_SUCCESS;
 972 }
 973
 974 static void transcode_audio_close( sout_stream_t *p_stream,
 975                                    sout_stream_id_t *id )
 976 {
 977     int i;
 978
 979     /* Close decoder */
 980     if( id->p_decoder->p_module )
 981         module_Unneed( id->p_decoder, id->p_decoder->p_module );
 982
 983     /* Close encoder */
 984     if( id->p_encoder->p_module )
 985         module_Unneed( id->p_encoder, id->p_encoder->p_module );
 986
 987     /* Close filters */
 988     for( i = 0; i < id->i_filter; i++ )
 989     {
 990         vlc_object_detach( id->pp_filter[i] );
 991         if( id->pp_filter[i]->p_module )
 992             module_Unneed( id->pp_filter[i], id->pp_filter[i]->p_module );
 993         vlc_object_destroy( id->pp_filter[i] );
 994     }
 995 }
 996
 997 static int transcode_audio_process( sout_stream_t *p_stream,
 998                                     sout_stream_id_t *id,
 999                                     block_t *in, block_t **out )
1000 {
1001     sout_stream_sys_t *p_sys = p_stream->p_sys;
1002     aout_buffer_t *p_audio_buf;
1003     block_t *p_block, *p_audio_block;
1004     int i;
1005     *out = NULL;
1006
1007     while( (p_audio_buf = id->p_decoder->pf_decode_audio( id->p_decoder,
1008                                                           &in )) )
1009     {
1010         if( p_sys->b_audio_sync )
1011         {
1012             mtime_t i_dts = date_Get( &id->interpolated_pts ) + 1;
1013             p_sys->i_master_drift = p_audio_buf->start_date - i_dts;
1014             date_Increment( &id->interpolated_pts, p_audio_buf->i_nb_samples );
1015             p_audio_buf->start_date -= p_sys->i_master_drift;
1016             p_audio_buf->end_date -= p_sys->i_master_drift;
1017         }
1018
1019         p_audio_block = p_audio_buf->p_sys;
1020         p_audio_block->i_buffer = p_audio_buf->i_nb_bytes;
1021         p_audio_block->i_dts = p_audio_block->i_pts =
1022             p_audio_buf->start_date;
1023         p_audio_block->i_length = p_audio_buf->end_date -
1024             p_audio_buf->start_date;
1025         p_audio_block->i_samples = p_audio_buf->i_nb_samples;
1026
1027         /* Run filter chain */
1028         for( i = 0; i < id->i_filter; i++ )
1029         {
1030             p_audio_block =
1031                 id->pp_filter[i]->pf_audio_filter( id->pp_filter[i],
1032                                                    p_audio_block );
1033         }
1034
1035         p_audio_buf->p_buffer = p_audio_block->p_buffer;
1036         p_audio_buf->i_nb_bytes = p_audio_block->i_buffer;
1037         p_audio_buf->i_nb_samples = p_audio_block->i_samples;
1038         p_audio_buf->start_date = p_audio_block->i_dts;
1039         p_audio_buf->end_date = p_audio_block->i_dts + p_audio_block->i_length;
1040
1041         p_block = id->p_encoder->pf_encode_audio( id->p_encoder, p_audio_buf );
1042         block_ChainAppend( out, p_block );
1043         block_Release( p_audio_block );
1044         free( p_audio_buf );
1045     }
1046
1047     return VLC_SUCCESS;
1048 }
1049
1050 static void audio_release_buffer( aout_buffer_t *p_buffer )
1051 {
1052     if( p_buffer && p_buffer->p_sys ) block_Release( p_buffer->p_sys );
1053     if( p_buffer ) free( p_buffer );
1054 }
1055
1056 static aout_buffer_t *audio_new_buffer( decoder_t *p_dec, int i_samples )
1057 {
1058     aout_buffer_t *p_buffer;
1059     block_t *p_block;
1060     int i_size;
1061
1062     if( p_dec->fmt_out.audio.i_bitspersample )
1063     {
1064         i_size = i_samples * p_dec->fmt_out.audio.i_bitspersample *
1065             p_dec->fmt_out.audio.i_channels;
1066     }
1067     else if( p_dec->fmt_out.audio.i_bytes_per_frame &&
1068              p_dec->fmt_out.audio.i_frame_length )
1069     {
1070         i_size = i_samples * p_dec->fmt_out.audio.i_bytes_per_frame /
1071             p_dec->fmt_out.audio.i_frame_length;
1072     }
1073     else
1074     {
1075         i_size = i_samples * 4 * p_dec->fmt_out.audio.i_channels;
1076     }
1077
1078     p_buffer = malloc( sizeof(aout_buffer_t) );
1079     p_buffer->pf_release = audio_release_buffer;
1080     p_buffer->p_sys = p_block = block_New( p_dec, i_size );
1081
1082     p_buffer->p_buffer = p_block->p_buffer;
1083     p_buffer->i_size = p_buffer->i_nb_bytes = p_block->i_buffer;
1084     p_buffer->i_nb_samples = i_samples;
1085     p_block->i_samples = i_samples;
1086
1087     return p_buffer;
1088 }
1089
1090 static void audio_del_buffer( decoder_t *p_dec, aout_buffer_t *p_buffer )
1091 {
1092     if( p_buffer && p_buffer->p_sys ) block_Release( p_buffer->p_sys );
1093     if( p_buffer ) free( p_buffer );
1094 }
1095
1096 /*
1097  * video
1098  */
1099 static int transcode_video_new( sout_stream_t *p_stream, sout_stream_id_t *id )
1100 {
1101     sout_stream_sys_t *p_sys = p_stream->p_sys;
1102
1103     /*
1104      * Open decoder
1105      */
1106
1107     /* Initialization of decoder structures */
1108     id->p_decoder->pf_decode_video = 0;
1109     id->p_decoder->pf_vout_buffer_new = video_new_buffer;
1110     id->p_decoder->pf_vout_buffer_del = video_del_buffer;
1111     id->p_decoder->pf_picture_link    = video_link_picture;
1112     id->p_decoder->pf_picture_unlink  = video_unlink_picture;
1113     //id->p_decoder->p_cfg = p_sys->p_video_cfg;
1114
1115     id->p_decoder->p_module =
1116         module_Need( id->p_decoder, "decoder", "$codec", 0 );
1117
1118     if( !id->p_decoder->p_module )
1119     {
1120         msg_Err( p_stream, "cannot find decoder" );
1121         return VLC_EGENERIC;
1122     }
1123
1124     /*
1125      * Open encoder.
1126      * Because some info about the decoded input will only be available
1127      * once the first frame is decoded, we actually only test the availability
1128      * of the encoder here.
1129      */
1130
1131     /* Initialization of encoder format structures */
1132     es_format_Init( &id->p_encoder->fmt_in, id->p_decoder->fmt_in.i_cat,
1133                     id->p_decoder->fmt_out.i_codec );
1134     id->p_encoder->fmt_in.video.i_chroma = id->p_decoder->fmt_out.i_codec;
1135
1136     /* The dimensions will be set properly later on.
1137      * Just put sensible values so we can test an encoder is available. */
1138     id->p_encoder->fmt_in.video.i_width =
1139         id->p_encoder->fmt_out.video.i_width ?
1140         id->p_encoder->fmt_out.video.i_width :
1141         id->p_decoder->fmt_in.video.i_width ?
1142         id->p_decoder->fmt_in.video.i_width : 16;
1143     id->p_encoder->fmt_in.video.i_height =
1144         id->p_encoder->fmt_out.video.i_height ?
1145         id->p_encoder->fmt_out.video.i_height :
1146         id->p_decoder->fmt_in.video.i_height ?
1147         id->p_decoder->fmt_in.video.i_height : 16;
1148     id->p_encoder->fmt_in.video.i_frame_rate = 25;
1149     id->p_encoder->fmt_in.video.i_frame_rate_base = 1;
1150
1151     id->p_encoder->i_threads = p_sys->i_threads;
1152     id->p_encoder->p_cfg = p_sys->p_video_cfg;
1153
1154     id->p_encoder->p_module =
1155         module_Need( id->p_encoder, "encoder", p_sys->psz_venc, VLC_TRUE );
1156     if( !id->p_encoder->p_module )
1157     {
1158         msg_Err( p_stream, "cannot find encoder" );
1159         module_Unneed( id->p_decoder, id->p_decoder->p_module );
1160         id->p_decoder->p_module = 0;
1161         return VLC_EGENERIC;
1162     }
1163
1164     /* Close the encoder.
1165      * We'll open it only when we have the first frame. */
1166     module_Unneed( id->p_encoder, id->p_encoder->p_module );
1167     id->p_encoder->p_module = NULL;
1168
1169     if( p_sys->i_threads >= 1 )
1170     {
1171         p_sys->id_video = id;
1172         vlc_mutex_init( p_stream, &p_sys->lock_out );
1173         vlc_cond_init( p_stream, &p_sys->cond );
1174         memset( p_sys->pp_pics, 0, sizeof(p_sys->pp_pics) );
1175         p_sys->i_first_pic = 0;
1176         p_sys->i_last_pic = 0;
1177         p_sys->p_buffers = NULL;
1178         p_sys->b_die = p_sys->b_error = 0;
1179         if( vlc_thread_create( p_sys, "encoder", EncoderThread,
1180                                VLC_THREAD_PRIORITY_VIDEO, VLC_FALSE ) )
1181         {
1182             msg_Err( p_stream, "cannot spawn encoder thread" );
1183             module_Unneed( id->p_decoder, id->p_decoder->p_module );
1184             id->p_decoder->p_module = 0;
1185             return VLC_EGENERIC;
1186         }
1187     }
1188
1189     return VLC_SUCCESS;
1190 }
1191
1192 static int transcode_video_encoder_open( sout_stream_t *p_stream,
1193                                          sout_stream_id_t *id )
1194 {
1195     sout_stream_sys_t *p_sys = p_stream->p_sys;
1196
1197     /* Hack because of the copy packetizer which can fail to detect the
1198      * proper size (which forces us to wait until the 1st frame
1199      * is decoded) */
1200     int i_width = id->p_decoder->fmt_out.video.i_width -
1201         p_sys->i_crop_left - p_sys->i_crop_right;
1202     int i_height = id->p_decoder->fmt_out.video.i_height -
1203         p_sys->i_crop_top - p_sys->i_crop_bottom;
1204
1205     if( id->p_encoder->fmt_out.video.i_width <= 0 &&
1206         id->p_encoder->fmt_out.video.i_height <= 0 && p_sys->f_scale )
1207     {
1208         /* Apply the scaling */
1209         id->p_encoder->fmt_out.video.i_width = i_width * p_sys->f_scale;
1210         id->p_encoder->fmt_out.video.i_height = i_height * p_sys->f_scale;
1211     }
1212     else if( id->p_encoder->fmt_out.video.i_width > 0 &&
1213              id->p_encoder->fmt_out.video.i_height <= 0 )
1214     {
1215         id->p_encoder->fmt_out.video.i_height =
1216             id->p_encoder->fmt_out.video.i_width / (double)i_width * i_height;
1217     }
1218     else if( id->p_encoder->fmt_out.video.i_width <= 0 &&
1219              id->p_encoder->fmt_out.video.i_height > 0 )
1220     {
1221         id->p_encoder->fmt_out.video.i_width =
1222             id->p_encoder->fmt_out.video.i_height / (double)i_height * i_width;
1223     }
1224
1225     /* Make sure the size is at least a multiple of 2 */
1226     id->p_encoder->fmt_out.video.i_width =
1227         (id->p_encoder->fmt_out.video.i_width + 1) >> 1 << 1;
1228     id->p_encoder->fmt_out.video.i_height =
1229         (id->p_encoder->fmt_out.video.i_height + 1) >> 1 << 1;
1230
1231     id->p_encoder->fmt_in.video.i_width =
1232         id->p_encoder->fmt_out.video.i_width;
1233     id->p_encoder->fmt_in.video.i_height =
1234         id->p_encoder->fmt_out.video.i_height;
1235
1236     if( !id->p_encoder->fmt_out.video.i_frame_rate ||
1237         !id->p_encoder->fmt_out.video.i_frame_rate_base )
1238     {
1239         if( id->p_decoder->fmt_out.video.i_frame_rate &&
1240             id->p_decoder->fmt_out.video.i_frame_rate_base )
1241         {
1242             id->p_encoder->fmt_out.video.i_frame_rate =
1243                 id->p_decoder->fmt_out.video.i_frame_rate;
1244             id->p_encoder->fmt_out.video.i_frame_rate_base =
1245                 id->p_decoder->fmt_out.video.i_frame_rate_base;
1246         }
1247         else
1248         {
1249             /* Pick a sensible default value */
1250             id->p_encoder->fmt_out.video.i_frame_rate = 25;
1251             id->p_encoder->fmt_out.video.i_frame_rate_base = 1;
1252         }
1253     }
1254
1255     id->p_encoder->fmt_in.video.i_frame_rate =
1256         id->p_encoder->fmt_out.video.i_frame_rate;
1257     id->p_encoder->fmt_in.video.i_frame_rate_base =
1258         id->p_encoder->fmt_out.video.i_frame_rate_base;
1259
1260     date_Init( &id->interpolated_pts,
1261                id->p_encoder->fmt_out.video.i_frame_rate,
1262                id->p_encoder->fmt_out.video.i_frame_rate_base );
1263
1264     /* Check whether a particular aspect ratio was requested */
1265     if( !id->p_encoder->fmt_out.video.i_aspect )
1266     {
1267         id->p_encoder->fmt_out.video.i_aspect =
1268             id->p_decoder->fmt_out.video.i_aspect;
1269     }
1270     id->p_encoder->fmt_in.video.i_aspect =
1271         id->p_encoder->fmt_out.video.i_aspect;
1272
1273     id->p_encoder->p_module =
1274         module_Need( id->p_encoder, "encoder", p_sys->psz_venc, VLC_TRUE );
1275     if( !id->p_encoder->p_module )
1276     {
1277         msg_Err( p_stream, "cannot find encoder" );
1278         return VLC_EGENERIC;
1279     }
1280
1281     id->p_encoder->fmt_in.video.i_chroma = id->p_encoder->fmt_in.i_codec;
1282
1283     /* Hack for mp2v/mp1v transcoding support */
1284     if( id->p_encoder->fmt_out.i_codec == VLC_FOURCC('m','p','1','v') ||
1285         id->p_encoder->fmt_out.i_codec == VLC_FOURCC('m','p','2','v') )
1286     {
1287         id->p_encoder->fmt_out.i_codec = VLC_FOURCC('m','p','g','v');
1288     }
1289
1290     id->id = p_stream->p_sys->p_out->pf_add( p_stream->p_sys->p_out,
1291                                              &id->p_encoder->fmt_out );
1292     if( !id->id )
1293     {
1294         msg_Err( p_stream, "cannot add this stream" );
1295         return VLC_EGENERIC;
1296     }
1297
1298     return VLC_SUCCESS;
1299 }
1300
1301 static void transcode_video_close( sout_stream_t *p_stream,
1302                                    sout_stream_id_t *id )
1303 {
1304     int i;
1305
1306     if( p_stream->p_sys->i_threads >= 1 )
1307     {
1308         vlc_mutex_lock( &p_stream->p_sys->lock_out );
1309         p_stream->p_sys->b_die = 1;
1310         vlc_cond_signal( &p_stream->p_sys->cond );
1311         vlc_mutex_unlock( &p_stream->p_sys->lock_out );
1312         vlc_thread_join( p_stream->p_sys );
1313         vlc_mutex_destroy( &p_stream->p_sys->lock_out );
1314         vlc_cond_destroy( &p_stream->p_sys->cond );
1315     }
1316
1317     /* Close decoder */
1318     if( id->p_decoder->p_module )
1319         module_Unneed( id->p_decoder, id->p_decoder->p_module );
1320
1321     /* Close encoder */
1322     if( id->p_encoder->p_module )
1323         module_Unneed( id->p_encoder, id->p_encoder->p_module );
1324
1325     /* Close filters */
1326     for( i = 0; i < id->i_filter; i++ )
1327     {
1328         vlc_object_detach( id->pp_filter[i] );
1329         if( id->pp_filter[i]->p_module )
1330             module_Unneed( id->pp_filter[i], id->pp_filter[i]->p_module );
1331         vlc_object_destroy( id->pp_filter[i] );
1332     }
1333 }
1334
1335 static int transcode_video_process( sout_stream_t *p_stream,
1336                                     sout_stream_id_t *id,
1337                                     block_t *in, block_t **out )
1338 {
1339     sout_stream_sys_t *p_sys = p_stream->p_sys;
1340     int i_duplicate = 1, i;
1341     picture_t *p_pic;
1342     *out = NULL;
1343
1344     while( (p_pic = id->p_decoder->pf_decode_video( id->p_decoder, &in )) )
1345     {
1346         subpicture_t *p_subpic = 0;
1347
1348         if( p_sys->b_audio_sync )
1349         {
1350             mtime_t i_video_drift;
1351             mtime_t i_master_drift = p_sys->i_master_drift;
1352             mtime_t i_pts;
1353
1354             if( !id->i_initial_pts ) id->i_initial_pts = p_pic->date;
1355
1356             if( !i_master_drift )
1357             {
1358                 /* No audio track ? */
1359                 i_master_drift = id->i_initial_pts;
1360             }
1361
1362             i_pts = date_Get( &id->interpolated_pts ) + 1;
1363             i_video_drift = p_pic->date - i_pts;
1364             i_duplicate = 1;
1365
1366             /* Set the pts of the frame being encoded */
1367             p_pic->date = i_pts;
1368
1369             if( i_video_drift < i_master_drift - 50000 )
1370             {
1371                 msg_Dbg( p_stream, "dropping frame (%i)",
1372                          (int)(i_video_drift - i_master_drift) );
1373                 return VLC_EGENERIC;
1374             }
1375             else if( i_video_drift > i_master_drift + 50000 )
1376             {
1377                 msg_Dbg( p_stream, "adding frame (%i)",
1378                          (int)(i_video_drift - i_master_drift) );
1379                 i_duplicate = 2;
1380             }
1381
1382             date_Increment( &id->interpolated_pts, 1 );
1383         }
1384
1385         if( !id->p_encoder->p_module )
1386         {
1387             if( transcode_video_encoder_open( p_stream, id ) != VLC_SUCCESS )
1388             {
1389                 transcode_video_close( p_stream, id );
1390                 id->b_transcode = VLC_FALSE;
1391             }
1392
1393             /* Check if we need a filter for chroma conversion or resizing */
1394             if( id->p_decoder->fmt_out.video.i_chroma !=
1395                 id->p_encoder->fmt_in.video.i_chroma ||
1396                 id->p_decoder->fmt_out.video.i_width !=
1397                 id->p_encoder->fmt_out.video.i_width ||
1398                 id->p_decoder->fmt_out.video.i_height !=
1399                 id->p_encoder->fmt_out.video.i_height ||
1400                 p_sys->i_crop_top > 0 || p_sys->i_crop_bottom > 0 ||
1401                 p_sys->i_crop_left > 0 || p_sys->i_crop_right > 0 )
1402             {
1403                 id->pp_filter[0] =
1404                     vlc_object_create( p_stream, VLC_OBJECT_FILTER );
1405                 vlc_object_attach( id->pp_filter[0], p_stream );
1406
1407                 id->pp_filter[0]->pf_vout_buffer_new = video_new_buffer;
1408                 id->pp_filter[0]->pf_vout_buffer_del = video_del_buffer;
1409
1410                 id->pp_filter[0]->fmt_in = id->p_decoder->fmt_out;
1411                 id->pp_filter[0]->fmt_out = id->p_encoder->fmt_in;
1412                 id->pp_filter[0]->p_module =
1413                     module_Need( id->pp_filter[0], "video filter2", 0, 0 );
1414                 if( id->pp_filter[0]->p_module ) id->i_filter++;
1415                 else
1416                 {
1417                     msg_Dbg( p_stream, "no video filter found" );
1418                     vlc_object_detach( id->pp_filter[0] );
1419                     vlc_object_destroy( id->pp_filter[0] );
1420                 }
1421             }
1422         }
1423
1424         /* Deinterlace */
1425         if( p_stream->p_sys->b_deinterlace )
1426         {
1427         }
1428
1429         /* Run filter chain */
1430         for( i = 0; i < id->i_filter; i++ )
1431         {
1432             p_pic = id->pp_filter[i]->pf_video_filter(id->pp_filter[i], p_pic);
1433         }
1434
1435         /*
1436          * Encoding
1437          */
1438
1439         /* Check if we have a subpicture to overlay */
1440         if( p_sys->p_filter_blend )
1441         {
1442             p_subpic = transcode_spu_get( p_stream, id, p_pic->date );
1443             /* TODO: get another pic */
1444         }
1445
1446         /* Overlay subpicture */
1447         if( p_subpic )
1448         {
1449             int i_width, i_height;
1450
1451             p_sys->p_filter_blend->fmt_out = id->p_encoder->fmt_in;
1452             p_sys->p_filter_blend->fmt_out.video.i_visible_width =
1453                 p_sys->p_filter_blend->fmt_out.video.i_width;
1454             p_sys->p_filter_blend->fmt_out.video.i_visible_height =
1455                 p_sys->p_filter_blend->fmt_out.video.i_height;
1456             p_sys->p_filter_blend->fmt_out.video.i_chroma =
1457                 VLC_FOURCC('I','4','2','0');
1458
1459             i_width = id->p_encoder->fmt_in.video.i_width;
1460             i_height = id->p_encoder->fmt_in.video.i_height;
1461
1462             while( p_subpic != NULL )
1463             {
1464                 subpicture_region_t *p_region = p_subpic->p_region;
1465
1466                 while( p_region && p_sys->p_filter_blend &&
1467                        p_sys->p_filter_blend->pf_video_blend )
1468                 {
1469                     int i_x_offset = p_region->i_x + p_subpic->i_x;
1470                     int i_y_offset = p_region->i_y + p_subpic->i_y;
1471
1472                     if( p_subpic->i_flags & OSD_ALIGN_BOTTOM )
1473                     {
1474                         i_y_offset = i_height - p_region->fmt.i_height -
1475                             p_subpic->i_y;
1476                     }
1477                     else if ( !(p_subpic->i_flags & OSD_ALIGN_TOP) )
1478                     {
1479                         i_y_offset = i_height / 2 - p_region->fmt.i_height / 2;
1480                     }
1481
1482                     if( p_subpic->i_flags & OSD_ALIGN_RIGHT )
1483                     {
1484                         i_x_offset = i_width - p_region->fmt.i_width -
1485                             p_subpic->i_x;
1486                     }
1487                     else if ( !(p_subpic->i_flags & OSD_ALIGN_LEFT) )
1488                     {
1489                         i_x_offset = i_width / 2 - p_region->fmt.i_width / 2;
1490                     }
1491
1492                     if( p_subpic->b_absolute )
1493                     {
1494                         i_x_offset = p_region->i_x + p_subpic->i_x;
1495                         i_y_offset = p_region->i_y + p_subpic->i_y;
1496                     }
1497
1498                     p_sys->p_filter_blend->fmt_in.video = p_region->fmt;
1499
1500                     p_sys->p_filter_blend->pf_video_blend(
1501                          p_sys->p_filter_blend, p_pic, p_pic,
1502                          &p_region->picture, i_x_offset, i_y_offset );
1503
1504                     p_region = p_region->p_next;
1505                 }
1506
1507                 p_subpic = p_subpic->p_next;
1508             }
1509         }
1510
1511         if( p_sys->i_threads >= 1 )
1512         {
1513             vlc_mutex_lock( &p_sys->lock_out );
1514             p_sys->pp_pics[p_sys->i_last_pic++] = p_pic;
1515             p_sys->i_last_pic %= PICTURE_RING_SIZE;
1516             *out = p_sys->p_buffers;
1517             p_sys->p_buffers = NULL;
1518             vlc_cond_signal( &p_sys->cond );
1519             vlc_mutex_unlock( &p_sys->lock_out );
1520         }
1521         else
1522         {
1523             block_t *p_block;
1524             p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
1525             block_ChainAppend( out, p_block );
1526
1527             if( p_sys->b_audio_sync && i_duplicate > 1 )
1528             {
1529                 mtime_t i_pts = date_Get( &id->interpolated_pts ) + 1;
1530                 date_Increment( &id->interpolated_pts, 1 );
1531                 p_pic->date = i_pts;
1532                 p_block = id->p_encoder->pf_encode_video(id->p_encoder, p_pic);
1533                 block_ChainAppend( out, p_block );
1534             }
1535
1536             p_pic->pf_release( p_pic );
1537         }
1538     }
1539
1540     return VLC_SUCCESS;
1541 }
1542
1543 static int EncoderThread( sout_stream_sys_t *p_sys )
1544 {
1545     sout_stream_id_t *id = p_sys->id_video;
1546     picture_t *p_pic;
1547     int i_plane;
1548
1549     while( !p_sys->b_die && !p_sys->b_error )
1550     {
1551         block_t *p_block;
1552
1553         vlc_mutex_lock( &p_sys->lock_out );
1554         while( p_sys->i_last_pic == p_sys->i_first_pic )
1555         {
1556             vlc_cond_wait( &p_sys->cond, &p_sys->lock_out );
1557             if( p_sys->b_die || p_sys->b_error ) break;
1558         }
1559         if( p_sys->b_die || p_sys->b_error )
1560         {
1561             vlc_mutex_unlock( &p_sys->lock_out );
1562             break;
1563         }
1564
1565         p_pic = p_sys->pp_pics[p_sys->i_first_pic++];
1566         p_sys->i_first_pic %= PICTURE_RING_SIZE;
1567         vlc_mutex_unlock( &p_sys->lock_out );
1568
1569         p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
1570         vlc_mutex_lock( &p_sys->lock_out );
1571         block_ChainAppend( &p_sys->p_buffers, p_block );
1572         vlc_mutex_unlock( &p_sys->lock_out );
1573
1574         for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
1575         {
1576             free( p_pic->p[i_plane].p_pixels );
1577         }
1578         free( p_pic );
1579     }
1580
1581     while( p_sys->i_last_pic != p_sys->i_first_pic )
1582     {
1583         p_pic = p_sys->pp_pics[p_sys->i_first_pic++];
1584         p_sys->i_first_pic %= PICTURE_RING_SIZE;
1585
1586         for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
1587         {
1588             free( p_pic->p[i_plane].p_pixels );
1589         }
1590         free( p_pic );
1591     }
1592
1593     block_ChainRelease( p_sys->p_buffers );
1594
1595     return 0;
1596 }
1597
1598 struct picture_sys_t
1599 {
1600     decoder_t *p_dec;
1601 };
1602
1603 static void video_release_buffer( picture_t *p_pic )
1604 {
1605     if( p_pic && !p_pic->i_refcount && p_pic->pf_release && p_pic->p_sys )
1606     {
1607         video_del_buffer( p_pic->p_sys->p_dec, p_pic );
1608     }
1609     else if( p_pic && p_pic->i_refcount > 0 ) p_pic->i_refcount--;
1610 }
1611
1612 static picture_t *video_new_buffer( decoder_t *p_dec )
1613 {
1614     picture_t *p_pic = malloc( sizeof(picture_t) );
1615
1616     p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
1617     vout_AllocatePicture( VLC_OBJECT(p_dec), p_pic,
1618                           p_dec->fmt_out.video.i_chroma,
1619                           p_dec->fmt_out.video.i_width,
1620                           p_dec->fmt_out.video.i_height,
1621                           p_dec->fmt_out.video.i_aspect );
1622
1623     if( !p_pic->i_planes )
1624     {
1625         free( p_pic );
1626         return 0;
1627     }
1628
1629     p_pic->pf_release = video_release_buffer;
1630     p_pic->p_sys = malloc( sizeof(picture_sys_t) );
1631     p_pic->p_sys->p_dec = p_dec;
1632
1633     return p_pic;
1634 }
1635
1636 static void video_del_buffer( decoder_t *p_dec, picture_t *p_pic )
1637 {
1638     if( p_pic && p_pic->p_data ) free( p_pic->p_data );
1639     if( p_pic && p_pic->p_sys ) free( p_pic->p_sys );
1640     if( p_pic ) free( p_pic );
1641 }
1642
1643 static void video_link_picture( decoder_t *p_dec, picture_t *p_pic )
1644 {
1645     p_pic->i_refcount++;
1646 }
1647
1648 static void video_unlink_picture( decoder_t *p_dec, picture_t *p_pic )
1649 {
1650     video_release_buffer( p_pic );
1651 }
1652
1653 /*
1654  * SPU
1655  */
1656 static subpicture_t *spu_new_buffer( decoder_t * );
1657 static void spu_del_buffer( decoder_t *, subpicture_t * );
1658
1659 static int transcode_spu_new( sout_stream_t *p_stream, sout_stream_id_t *id )
1660 {
1661     sout_stream_sys_t *p_sys = p_stream->p_sys;
1662
1663     /*
1664      * Open decoder
1665      */
1666
1667     /* Initialization of decoder structures */
1668     id->p_decoder->pf_spu_buffer_new = spu_new_buffer;
1669     id->p_decoder->pf_spu_buffer_del = spu_del_buffer;
1670     //id->p_decoder->p_cfg = p_sys->p_spu_cfg;
1671
1672     id->p_decoder->p_module =
1673         module_Need( id->p_decoder, "decoder", "$codec", 0 );
1674
1675     if( !id->p_decoder->p_module )
1676     {
1677         msg_Err( p_stream, "cannot find decoder" );
1678         return VLC_EGENERIC;
1679     }
1680
1681     if( !p_sys->b_soverlay )
1682     {
1683         /*
1684          * Open encoder
1685          */
1686
1687         /* Initialization of encoder format structures */
1688         es_format_Init( &id->p_encoder->fmt_in, id->p_decoder->fmt_in.i_cat,
1689                         id->p_decoder->fmt_in.i_codec );
1690
1691         id->p_encoder->p_cfg = p_sys->p_spu_cfg;
1692
1693         id->p_encoder->p_module =
1694             module_Need( id->p_encoder, "encoder", p_sys->psz_senc, VLC_TRUE );
1695
1696         if( !id->p_encoder->p_module )
1697         {
1698             module_Unneed( id->p_decoder, id->p_decoder->p_module );
1699             msg_Err( p_stream, "cannot find encoder" );
1700             return VLC_EGENERIC;
1701         }
1702     }
1703     else
1704     {
1705         p_sys->p_filter_blend =
1706             vlc_object_create( p_stream, VLC_OBJECT_FILTER );
1707         vlc_object_attach( p_sys->p_filter_blend, p_stream );
1708         p_sys->p_filter_blend->fmt_out.video.i_chroma =
1709             VLC_FOURCC('I','4','2','0');
1710         p_sys->p_filter_blend->fmt_in.video.i_chroma =
1711             VLC_FOURCC('Y','U','V','A');
1712         p_sys->p_filter_blend->p_module =
1713             module_Need( p_sys->p_filter_blend, "video blending", 0, 0 );
1714     }
1715
1716     return VLC_SUCCESS;
1717 }
1718
1719 static void transcode_spu_close( sout_stream_t *p_stream, sout_stream_id_t *id)
1720 {
1721     sout_stream_sys_t *p_sys = p_stream->p_sys;
1722     int i;
1723
1724     /* Close decoder */
1725     if( id->p_decoder->p_module )
1726         module_Unneed( id->p_decoder, id->p_decoder->p_module );
1727
1728     /* Close encoder */
1729     if( id->p_encoder->p_module )
1730         module_Unneed( id->p_encoder, id->p_encoder->p_module );
1731
1732     /* Free subpictures */
1733     for( i = 0; i < SUBPICTURE_RING_SIZE; i++ )
1734     {
1735         if( !p_sys->pp_subpics[i] ) continue;
1736
1737         spu_del_buffer( id->p_decoder, p_sys->pp_subpics[i] );
1738         p_sys->pp_subpics[i] = NULL;
1739     }
1740 }
1741
1742 static int transcode_spu_process( sout_stream_t *p_stream,
1743                                   sout_stream_id_t *id,
1744                                   block_t *in, block_t **out )
1745 {
1746     sout_stream_sys_t *p_sys = p_stream->p_sys;
1747     subpicture_t *p_subpic;
1748     *out = NULL;
1749
1750     p_subpic = id->p_decoder->pf_decode_sub( id->p_decoder, &in );
1751     if( p_subpic && p_sys->b_soverlay )
1752     {
1753         int i;
1754
1755         /* Find a free slot in our supictures ring buffer */
1756         for( i = 0; i < SUBPICTURE_RING_SIZE; i++ )
1757         {
1758             if( !p_sys->pp_subpics[i] )
1759             {
1760                 p_sys->pp_subpics[i] = p_subpic;
1761                 break;
1762             }
1763         }
1764         if( i == SUBPICTURE_RING_SIZE )
1765         {
1766             spu_del_buffer( id->p_decoder, p_subpic );
1767         }
1768     }
1769
1770     if(  p_subpic && !p_sys->b_soverlay )
1771     {
1772         block_t *p_block;
1773
1774         p_block = id->p_encoder->pf_encode_sub( id->p_encoder, p_subpic );
1775         spu_del_buffer( id->p_decoder, p_subpic );
1776
1777         if( p_block )
1778         {
1779             block_ChainAppend( out, p_block );
1780             return VLC_SUCCESS;
1781         }
1782     }
1783
1784     return VLC_EGENERIC;
1785 }
1786
1787 static subpicture_t *transcode_spu_get( sout_stream_t *p_stream,
1788                                         sout_stream_id_t *id,
1789                                         mtime_t display_date )
1790 {
1791     sout_stream_sys_t *p_sys = p_stream->p_sys;
1792     subpicture_t *p_subpic = 0;
1793     subpicture_t *p_ephemer = 0;
1794     subpicture_t **pp_subpic = &p_subpic;
1795     int i;
1796
1797     /* Find current subpictures and remove old ones */
1798     for( i = 0; i < SUBPICTURE_RING_SIZE; i++ )
1799     {
1800         if( !p_sys->pp_subpics[i] ) continue;
1801
1802         if( !p_sys->pp_subpics[i]->b_ephemer &&
1803             p_sys->pp_subpics[i]->i_stop < display_date )
1804         {
1805             spu_del_buffer( id->p_decoder, p_sys->pp_subpics[i] );
1806             p_sys->pp_subpics[i] = NULL;
1807             continue;
1808         }
1809
1810         if( p_sys->pp_subpics[i]->i_start > display_date ) continue;
1811
1812         if( p_sys->pp_subpics[i]->b_ephemer && !p_ephemer )
1813         {
1814             p_ephemer = p_sys->pp_subpics[i];
1815         }
1816         else if( p_sys->pp_subpics[i]->b_ephemer )
1817         {
1818             if( p_ephemer->i_start < p_sys->pp_subpics[i]->i_start )
1819             {
1820                 subpicture_t tmp;
1821                 tmp = *p_ephemer;
1822                 *p_ephemer = *p_sys->pp_subpics[i];
1823                 *p_sys->pp_subpics[i] = tmp;
1824             }
1825
1826             spu_del_buffer( id->p_decoder, p_sys->pp_subpics[i] );
1827             p_sys->pp_subpics[i] = NULL;
1828             continue;
1829         }
1830
1831         /* Add subpicture to the list */
1832         *pp_subpic = p_sys->pp_subpics[i];
1833         pp_subpic = &p_sys->pp_subpics[i]->p_next;
1834     }
1835
1836     return p_subpic;
1837 }
1838
1839 static subpicture_t *spu_new_buffer( decoder_t *p_dec )
1840 {
1841     subpicture_t *p_subpic = (subpicture_t *)malloc(sizeof(subpicture_t));
1842     memset( p_subpic, 0, sizeof(subpicture_t) );
1843     p_subpic->b_absolute = VLC_TRUE;
1844
1845     p_subpic->pf_create_region = __spu_CreateRegion;
1846     p_subpic->pf_destroy_region = __spu_DestroyRegion;
1847
1848     return p_subpic;
1849 }
1850
1851 static void spu_del_buffer( decoder_t *p_dec, subpicture_t *p_subpic )
1852 {
1853     while( p_subpic->p_region )
1854     {
1855         subpicture_region_t *p_region = p_subpic->p_region;
1856         p_subpic->p_region = p_region->p_next;
1857         p_subpic->pf_destroy_region( VLC_OBJECT(p_dec), p_region );
1858     }
1859
1860     free( p_subpic );
1861 }