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 8;
 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 16;
 828
 829     case VLC_FOURCC('u','2','4','l'):
 830     case VLC_FOURCC('s','2','4','l'):
 831     case VLC_FOURCC('u','2','4','b'):
 832     case VLC_FOURCC('s','2','4','b'):
 833         return 24;
 834
 835     case VLC_FOURCC('u','3','2','l'):
 836     case VLC_FOURCC('s','3','2','l'):
 837     case VLC_FOURCC('u','3','2','b'):
 838     case VLC_FOURCC('s','3','2','b'):
 839     case VLC_FOURCC('f','l','3','2'):
 840     case VLC_FOURCC('f','i','3','2'):
 841         return 32;
 842
 843     case VLC_FOURCC('f','l','6','4'):
 844         return 64;
 845     }
 846
 847     return 0;
 848 }
 849
 850 static int transcode_audio_new( sout_stream_t *p_stream,
 851                                 sout_stream_id_t *id )
 852 {
 853     sout_stream_sys_t *p_sys = p_stream->p_sys;
 854
 855     /*
 856      * Open decoder
 857      */
 858
 859     /* Initialization of decoder structures */
 860     id->p_decoder->pf_decode_audio = 0;
 861     id->p_decoder->pf_aout_buffer_new = audio_new_buffer;
 862     id->p_decoder->pf_aout_buffer_del = audio_del_buffer;
 863     //id->p_decoder->p_cfg = p_sys->p_video_cfg;
 864
 865     id->p_decoder->p_module =
 866         module_Need( id->p_decoder, "decoder", "$codec", 0 );
 867
 868     if( !id->p_decoder->p_module )
 869     {
 870         msg_Err( p_stream, "cannot find decoder" );
 871         return VLC_EGENERIC;
 872     }
 873     id->p_decoder->fmt_out.audio.i_bitspersample =
 874         audio_BitsPerSample( id->p_decoder->fmt_out.i_codec );
 875
 876     /*
 877      * Open encoder
 878      */
 879
 880     /* Initialization of encoder format structures */
 881     es_format_Init( &id->p_encoder->fmt_in, id->p_decoder->fmt_in.i_cat,
 882                     id->p_decoder->fmt_out.i_codec );
 883     id->p_encoder->fmt_in.audio.i_format = id->p_decoder->fmt_out.i_codec;
 884
 885     /* Sanity check for audio channels */
 886     id->p_encoder->fmt_out.audio.i_channels =
 887         __MIN( id->p_encoder->fmt_out.audio.i_channels,
 888                id->p_decoder->fmt_out.audio.i_channels );
 889     if( id->p_decoder->fmt_out.audio.i_channels ==
 890         id->p_encoder->fmt_out.audio.i_channels )
 891         id->p_encoder->fmt_out.audio.i_physical_channels =
 892             id->p_encoder->fmt_out.audio.i_original_channels =
 893                 id->p_decoder->fmt_out.audio.i_physical_channels;
 894     else
 895         id->p_encoder->fmt_out.audio.i_physical_channels =
 896             id->p_encoder->fmt_out.audio.i_original_channels =
 897                 pi_channels_maps[id->p_encoder->fmt_out.audio.i_channels];
 898
 899     /* Initialization of encoder format structures */
 900     es_format_Init( &id->p_encoder->fmt_in, AUDIO_ES, AOUT_FMT_S16_NE );
 901     id->p_encoder->fmt_in.audio.i_format = AOUT_FMT_S16_NE;
 902     id->p_encoder->fmt_in.audio.i_rate = id->p_encoder->fmt_out.audio.i_rate;
 903     id->p_encoder->fmt_in.audio.i_physical_channels =
 904         id->p_encoder->fmt_in.audio.i_original_channels =
 905             id->p_encoder->fmt_out.audio.i_physical_channels;
 906     id->p_encoder->fmt_in.audio.i_channels =
 907         id->p_encoder->fmt_out.audio.i_channels;
 908     id->p_encoder->fmt_in.audio.i_bitspersample =
 909         audio_BitsPerSample( id->p_encoder->fmt_in.i_codec );
 910
 911     id->p_encoder->p_cfg = p_stream->p_sys->p_audio_cfg;
 912
 913     id->p_encoder->p_module =
 914         module_Need( id->p_encoder, "encoder", p_sys->psz_aenc, VLC_TRUE );
 915     if( !id->p_encoder->p_module )
 916     {
 917         msg_Err( p_stream, "cannot find encoder" );
 918         module_Unneed( id->p_decoder, id->p_decoder->p_module );
 919         id->p_decoder->p_module = 0;
 920         return VLC_EGENERIC;
 921     }
 922     id->p_encoder->fmt_in.audio.i_format = id->p_encoder->fmt_in.i_codec;
 923     id->p_encoder->fmt_in.audio.i_bitspersample =
 924         audio_BitsPerSample( id->p_encoder->fmt_in.i_codec );
 925
 926     /* Check if we need a filter for chroma conversion or resizing */
 927     if( id->p_decoder->fmt_out.i_codec !=
 928         id->p_encoder->fmt_in.i_codec )
 929     {
 930         id->pp_filter[0] =
 931             vlc_object_create( p_stream, VLC_OBJECT_FILTER );
 932         vlc_object_attach( id->pp_filter[0], p_stream );
 933
 934         id->pp_filter[0]->pf_audio_buffer_new = __block_New;
 935
 936         id->pp_filter[0]->fmt_in = id->p_decoder->fmt_out;
 937         id->pp_filter[0]->fmt_out = id->p_encoder->fmt_in;
 938         id->pp_filter[0]->p_module =
 939             module_Need( id->pp_filter[0], "audio filter2", 0, 0 );
 940         if( id->pp_filter[0]->p_module ) id->i_filter++;
 941         else
 942         {
 943             msg_Dbg( p_stream, "no audio filter found" );
 944             vlc_object_detach( id->pp_filter[0] );
 945             vlc_object_destroy( id->pp_filter[0] );
 946             module_Unneed( id->p_decoder, id->p_decoder->p_module );
 947             id->p_decoder->p_module = 0;
 948             module_Unneed( id->p_encoder, id->p_encoder->p_module );
 949             id->p_encoder->p_module = 0;
 950             return VLC_EGENERIC;
 951         }
 952
 953         id->pp_filter[0]->fmt_out.audio.i_bitspersample =
 954             audio_BitsPerSample( id->pp_filter[0]->fmt_out.i_codec );
 955
 956         /* Try a 2 stage conversion */
 957         if( id->pp_filter[0]->fmt_out.i_codec !=
 958             id->p_encoder->fmt_in.i_codec )
 959         {
 960             id->pp_filter[1] =
 961                 vlc_object_create( p_stream, VLC_OBJECT_FILTER );
 962             vlc_object_attach( id->pp_filter[1], p_stream );
 963
 964             id->pp_filter[1]->pf_audio_buffer_new = __block_New;
 965
 966             id->pp_filter[1]->fmt_in = id->pp_filter[0]->fmt_out;
 967             id->pp_filter[1]->fmt_out = id->p_encoder->fmt_in;
 968             id->pp_filter[1]->p_module =
 969               module_Need( id->pp_filter[1], "audio filter2", 0, 0 );
 970             if( !id->pp_filter[1]->p_module ||
 971                 id->pp_filter[1]->fmt_out.i_codec !=
 972                   id->p_encoder->fmt_in.i_codec )
 973             {
 974                 msg_Dbg( p_stream, "no audio filter found" );
 975                 module_Unneed( id->pp_filter[0], id->pp_filter[0]->p_module );
 976                 vlc_object_detach( id->pp_filter[0] );
 977                 vlc_object_destroy( id->pp_filter[0] );
 978                 if( id->pp_filter[1]->p_module )
 979                 module_Unneed( id->pp_filter[0], id->pp_filter[0]->p_module );
 980                 vlc_object_detach( id->pp_filter[1] );
 981                 vlc_object_destroy( id->pp_filter[1] );
 982                 module_Unneed( id->p_decoder, id->p_decoder->p_module );
 983                 id->p_decoder->p_module = 0;
 984                 module_Unneed( id->p_encoder, id->p_encoder->p_module );
 985                 id->p_encoder->p_module = 0;
 986                 return VLC_EGENERIC;
 987             }
 988             else id->i_filter++;
 989         }
 990     }
 991
 992     /* FIXME: Hack for mp3 transcoding support */
 993     if( id->p_encoder->fmt_out.i_codec == VLC_FOURCC( 'm','p','3',' ' ) )
 994         id->p_encoder->fmt_out.i_codec = VLC_FOURCC( 'm','p','g','a' );
 995
 996     return VLC_SUCCESS;
 997 }
 998
 999 static void transcode_audio_close( sout_stream_t *p_stream,
1000                                    sout_stream_id_t *id )
1001 {
1002     int i;
1003
1004     /* Close decoder */
1005     if( id->p_decoder->p_module )
1006         module_Unneed( id->p_decoder, id->p_decoder->p_module );
1007
1008     /* Close encoder */
1009     if( id->p_encoder->p_module )
1010         module_Unneed( id->p_encoder, id->p_encoder->p_module );
1011
1012     /* Close filters */
1013     for( i = 0; i < id->i_filter; i++ )
1014     {
1015         vlc_object_detach( id->pp_filter[i] );
1016         if( id->pp_filter[i]->p_module )
1017             module_Unneed( id->pp_filter[i], id->pp_filter[i]->p_module );
1018         vlc_object_destroy( id->pp_filter[i] );
1019     }
1020 }
1021
1022 static int transcode_audio_process( sout_stream_t *p_stream,
1023                                     sout_stream_id_t *id,
1024                                     block_t *in, block_t **out )
1025 {
1026     sout_stream_sys_t *p_sys = p_stream->p_sys;
1027     aout_buffer_t *p_audio_buf;
1028     block_t *p_block, *p_audio_block;
1029     int i;
1030     *out = NULL;
1031
1032     while( (p_audio_buf = id->p_decoder->pf_decode_audio( id->p_decoder,
1033                                                           &in )) )
1034     {
1035         if( p_sys->b_audio_sync )
1036         {
1037             mtime_t i_dts = date_Get( &id->interpolated_pts ) + 1;
1038             p_sys->i_master_drift = p_audio_buf->start_date - i_dts;
1039             date_Increment( &id->interpolated_pts, p_audio_buf->i_nb_samples );
1040             p_audio_buf->start_date -= p_sys->i_master_drift;
1041             p_audio_buf->end_date -= p_sys->i_master_drift;
1042         }
1043
1044         p_audio_block = p_audio_buf->p_sys;
1045         p_audio_block->i_buffer = p_audio_buf->i_nb_bytes;
1046         p_audio_block->i_dts = p_audio_block->i_pts =
1047             p_audio_buf->start_date;
1048         p_audio_block->i_length = p_audio_buf->end_date -
1049             p_audio_buf->start_date;
1050         p_audio_block->i_samples = p_audio_buf->i_nb_samples;
1051
1052         /* Run filter chain */
1053         for( i = 0; i < id->i_filter; i++ )
1054         {
1055             p_audio_block =
1056                 id->pp_filter[i]->pf_audio_filter( id->pp_filter[i],
1057                                                    p_audio_block );
1058         }
1059
1060         p_audio_buf->p_buffer = p_audio_block->p_buffer;
1061         p_audio_buf->i_nb_bytes = p_audio_block->i_buffer;
1062         p_audio_buf->i_nb_samples = p_audio_block->i_samples;
1063         p_audio_buf->start_date = p_audio_block->i_dts;
1064         p_audio_buf->end_date = p_audio_block->i_dts + p_audio_block->i_length;
1065
1066         p_block = id->p_encoder->pf_encode_audio( id->p_encoder, p_audio_buf );
1067         block_ChainAppend( out, p_block );
1068         block_Release( p_audio_block );
1069         free( p_audio_buf );
1070     }
1071
1072     return VLC_SUCCESS;
1073 }
1074
1075 static void audio_release_buffer( aout_buffer_t *p_buffer )
1076 {
1077     if( p_buffer && p_buffer->p_sys ) block_Release( p_buffer->p_sys );
1078     if( p_buffer ) free( p_buffer );
1079 }
1080
1081 static aout_buffer_t *audio_new_buffer( decoder_t *p_dec, int i_samples )
1082 {
1083     aout_buffer_t *p_buffer;
1084     block_t *p_block;
1085     int i_size;
1086
1087     if( p_dec->fmt_out.audio.i_bitspersample )
1088     {
1089         i_size = i_samples * p_dec->fmt_out.audio.i_bitspersample / 8 *
1090             p_dec->fmt_out.audio.i_channels;
1091     }
1092     else if( p_dec->fmt_out.audio.i_bytes_per_frame &&
1093              p_dec->fmt_out.audio.i_frame_length )
1094     {
1095         i_size = i_samples * p_dec->fmt_out.audio.i_bytes_per_frame /
1096             p_dec->fmt_out.audio.i_frame_length;
1097     }
1098     else
1099     {
1100         i_size = i_samples * 4 * p_dec->fmt_out.audio.i_channels;
1101     }
1102
1103     p_buffer = malloc( sizeof(aout_buffer_t) );
1104     p_buffer->pf_release = audio_release_buffer;
1105     p_buffer->p_sys = p_block = block_New( p_dec, i_size );
1106
1107     p_buffer->p_buffer = p_block->p_buffer;
1108     p_buffer->i_size = p_buffer->i_nb_bytes = p_block->i_buffer;
1109     p_buffer->i_nb_samples = i_samples;
1110     p_block->i_samples = i_samples;
1111
1112     return p_buffer;
1113 }
1114
1115 static void audio_del_buffer( decoder_t *p_dec, aout_buffer_t *p_buffer )
1116 {
1117     if( p_buffer && p_buffer->p_sys ) block_Release( p_buffer->p_sys );
1118     if( p_buffer ) free( p_buffer );
1119 }
1120
1121 /*
1122  * video
1123  */
1124 static int transcode_video_new( sout_stream_t *p_stream, sout_stream_id_t *id )
1125 {
1126     sout_stream_sys_t *p_sys = p_stream->p_sys;
1127
1128     /*
1129      * Open decoder
1130      */
1131
1132     /* Initialization of decoder structures */
1133     id->p_decoder->pf_decode_video = 0;
1134     id->p_decoder->pf_vout_buffer_new = video_new_buffer;
1135     id->p_decoder->pf_vout_buffer_del = video_del_buffer;
1136     id->p_decoder->pf_picture_link    = video_link_picture;
1137     id->p_decoder->pf_picture_unlink  = video_unlink_picture;
1138     //id->p_decoder->p_cfg = p_sys->p_video_cfg;
1139
1140     id->p_decoder->p_module =
1141         module_Need( id->p_decoder, "decoder", "$codec", 0 );
1142
1143     if( !id->p_decoder->p_module )
1144     {
1145         msg_Err( p_stream, "cannot find decoder" );
1146         return VLC_EGENERIC;
1147     }
1148
1149     /*
1150      * Open encoder.
1151      * Because some info about the decoded input will only be available
1152      * once the first frame is decoded, we actually only test the availability
1153      * of the encoder here.
1154      */
1155
1156     /* Initialization of encoder format structures */
1157     es_format_Init( &id->p_encoder->fmt_in, id->p_decoder->fmt_in.i_cat,
1158                     id->p_decoder->fmt_out.i_codec );
1159     id->p_encoder->fmt_in.video.i_chroma = id->p_decoder->fmt_out.i_codec;
1160
1161     /* The dimensions will be set properly later on.
1162      * Just put sensible values so we can test an encoder is available. */
1163     id->p_encoder->fmt_in.video.i_width =
1164         id->p_encoder->fmt_out.video.i_width ?
1165         id->p_encoder->fmt_out.video.i_width :
1166         id->p_decoder->fmt_in.video.i_width ?
1167         id->p_decoder->fmt_in.video.i_width : 16;
1168     id->p_encoder->fmt_in.video.i_height =
1169         id->p_encoder->fmt_out.video.i_height ?
1170         id->p_encoder->fmt_out.video.i_height :
1171         id->p_decoder->fmt_in.video.i_height ?
1172         id->p_decoder->fmt_in.video.i_height : 16;
1173     id->p_encoder->fmt_in.video.i_frame_rate = 25;
1174     id->p_encoder->fmt_in.video.i_frame_rate_base = 1;
1175
1176     id->p_encoder->i_threads = p_sys->i_threads;
1177     id->p_encoder->p_cfg = p_sys->p_video_cfg;
1178
1179     id->p_encoder->p_module =
1180         module_Need( id->p_encoder, "encoder", p_sys->psz_venc, VLC_TRUE );
1181     if( !id->p_encoder->p_module )
1182     {
1183         msg_Err( p_stream, "cannot find encoder" );
1184         module_Unneed( id->p_decoder, id->p_decoder->p_module );
1185         id->p_decoder->p_module = 0;
1186         return VLC_EGENERIC;
1187     }
1188
1189     /* Close the encoder.
1190      * We'll open it only when we have the first frame. */
1191     module_Unneed( id->p_encoder, id->p_encoder->p_module );
1192     id->p_encoder->p_module = NULL;
1193
1194     if( p_sys->i_threads >= 1 )
1195     {
1196         p_sys->id_video = id;
1197         vlc_mutex_init( p_stream, &p_sys->lock_out );
1198         vlc_cond_init( p_stream, &p_sys->cond );
1199         memset( p_sys->pp_pics, 0, sizeof(p_sys->pp_pics) );
1200         p_sys->i_first_pic = 0;
1201         p_sys->i_last_pic = 0;
1202         p_sys->p_buffers = NULL;
1203         p_sys->b_die = p_sys->b_error = 0;
1204         if( vlc_thread_create( p_sys, "encoder", EncoderThread,
1205                                VLC_THREAD_PRIORITY_VIDEO, VLC_FALSE ) )
1206         {
1207             msg_Err( p_stream, "cannot spawn encoder thread" );
1208             module_Unneed( id->p_decoder, id->p_decoder->p_module );
1209             id->p_decoder->p_module = 0;
1210             return VLC_EGENERIC;
1211         }
1212     }
1213
1214     return VLC_SUCCESS;
1215 }
1216
1217 static int transcode_video_encoder_open( sout_stream_t *p_stream,
1218                                          sout_stream_id_t *id )
1219 {
1220     sout_stream_sys_t *p_sys = p_stream->p_sys;
1221
1222     /* Hack because of the copy packetizer which can fail to detect the
1223      * proper size (which forces us to wait until the 1st frame
1224      * is decoded) */
1225     int i_width = id->p_decoder->fmt_out.video.i_width -
1226         p_sys->i_crop_left - p_sys->i_crop_right;
1227     int i_height = id->p_decoder->fmt_out.video.i_height -
1228         p_sys->i_crop_top - p_sys->i_crop_bottom;
1229
1230     if( id->p_encoder->fmt_out.video.i_width <= 0 &&
1231         id->p_encoder->fmt_out.video.i_height <= 0 && p_sys->f_scale )
1232     {
1233         /* Apply the scaling */
1234         id->p_encoder->fmt_out.video.i_width = i_width * p_sys->f_scale;
1235         id->p_encoder->fmt_out.video.i_height = i_height * p_sys->f_scale;
1236     }
1237     else if( id->p_encoder->fmt_out.video.i_width > 0 &&
1238              id->p_encoder->fmt_out.video.i_height <= 0 )
1239     {
1240         id->p_encoder->fmt_out.video.i_height =
1241             id->p_encoder->fmt_out.video.i_width / (double)i_width * i_height;
1242     }
1243     else if( id->p_encoder->fmt_out.video.i_width <= 0 &&
1244              id->p_encoder->fmt_out.video.i_height > 0 )
1245     {
1246         id->p_encoder->fmt_out.video.i_width =
1247             id->p_encoder->fmt_out.video.i_height / (double)i_height * i_width;
1248     }
1249
1250     /* Make sure the size is at least a multiple of 2 */
1251     id->p_encoder->fmt_out.video.i_width =
1252         (id->p_encoder->fmt_out.video.i_width + 1) >> 1 << 1;
1253     id->p_encoder->fmt_out.video.i_height =
1254         (id->p_encoder->fmt_out.video.i_height + 1) >> 1 << 1;
1255
1256     id->p_encoder->fmt_in.video.i_width =
1257         id->p_encoder->fmt_out.video.i_width;
1258     id->p_encoder->fmt_in.video.i_height =
1259         id->p_encoder->fmt_out.video.i_height;
1260
1261     if( !id->p_encoder->fmt_out.video.i_frame_rate ||
1262         !id->p_encoder->fmt_out.video.i_frame_rate_base )
1263     {
1264         if( id->p_decoder->fmt_out.video.i_frame_rate &&
1265             id->p_decoder->fmt_out.video.i_frame_rate_base )
1266         {
1267             id->p_encoder->fmt_out.video.i_frame_rate =
1268                 id->p_decoder->fmt_out.video.i_frame_rate;
1269             id->p_encoder->fmt_out.video.i_frame_rate_base =
1270                 id->p_decoder->fmt_out.video.i_frame_rate_base;
1271         }
1272         else
1273         {
1274             /* Pick a sensible default value */
1275             id->p_encoder->fmt_out.video.i_frame_rate = 25;
1276             id->p_encoder->fmt_out.video.i_frame_rate_base = 1;
1277         }
1278     }
1279
1280     id->p_encoder->fmt_in.video.i_frame_rate =
1281         id->p_encoder->fmt_out.video.i_frame_rate;
1282     id->p_encoder->fmt_in.video.i_frame_rate_base =
1283         id->p_encoder->fmt_out.video.i_frame_rate_base;
1284
1285     date_Init( &id->interpolated_pts,
1286                id->p_encoder->fmt_out.video.i_frame_rate,
1287                id->p_encoder->fmt_out.video.i_frame_rate_base );
1288
1289     /* Check whether a particular aspect ratio was requested */
1290     if( !id->p_encoder->fmt_out.video.i_aspect )
1291     {
1292         id->p_encoder->fmt_out.video.i_aspect =
1293             id->p_decoder->fmt_out.video.i_aspect;
1294     }
1295     id->p_encoder->fmt_in.video.i_aspect =
1296         id->p_encoder->fmt_out.video.i_aspect;
1297
1298     id->p_encoder->p_module =
1299         module_Need( id->p_encoder, "encoder", p_sys->psz_venc, VLC_TRUE );
1300     if( !id->p_encoder->p_module )
1301     {
1302         msg_Err( p_stream, "cannot find encoder" );
1303         return VLC_EGENERIC;
1304     }
1305
1306     id->p_encoder->fmt_in.video.i_chroma = id->p_encoder->fmt_in.i_codec;
1307
1308     /* Hack for mp2v/mp1v transcoding support */
1309     if( id->p_encoder->fmt_out.i_codec == VLC_FOURCC('m','p','1','v') ||
1310         id->p_encoder->fmt_out.i_codec == VLC_FOURCC('m','p','2','v') )
1311     {
1312         id->p_encoder->fmt_out.i_codec = VLC_FOURCC('m','p','g','v');
1313     }
1314
1315     id->id = p_stream->p_sys->p_out->pf_add( p_stream->p_sys->p_out,
1316                                              &id->p_encoder->fmt_out );
1317     if( !id->id )
1318     {
1319         msg_Err( p_stream, "cannot add this stream" );
1320         return VLC_EGENERIC;
1321     }
1322
1323     return VLC_SUCCESS;
1324 }
1325
1326 static void transcode_video_close( sout_stream_t *p_stream,
1327                                    sout_stream_id_t *id )
1328 {
1329     int i;
1330
1331     if( p_stream->p_sys->i_threads >= 1 )
1332     {
1333         vlc_mutex_lock( &p_stream->p_sys->lock_out );
1334         p_stream->p_sys->b_die = 1;
1335         vlc_cond_signal( &p_stream->p_sys->cond );
1336         vlc_mutex_unlock( &p_stream->p_sys->lock_out );
1337         vlc_thread_join( p_stream->p_sys );
1338         vlc_mutex_destroy( &p_stream->p_sys->lock_out );
1339         vlc_cond_destroy( &p_stream->p_sys->cond );
1340     }
1341
1342     /* Close decoder */
1343     if( id->p_decoder->p_module )
1344         module_Unneed( id->p_decoder, id->p_decoder->p_module );
1345
1346     /* Close encoder */
1347     if( id->p_encoder->p_module )
1348         module_Unneed( id->p_encoder, id->p_encoder->p_module );
1349
1350     /* Close filters */
1351     for( i = 0; i < id->i_filter; i++ )
1352     {
1353         vlc_object_detach( id->pp_filter[i] );
1354         if( id->pp_filter[i]->p_module )
1355             module_Unneed( id->pp_filter[i], id->pp_filter[i]->p_module );
1356         vlc_object_destroy( id->pp_filter[i] );
1357     }
1358 }
1359
1360 static int transcode_video_process( sout_stream_t *p_stream,
1361                                     sout_stream_id_t *id,
1362                                     block_t *in, block_t **out )
1363 {
1364     sout_stream_sys_t *p_sys = p_stream->p_sys;
1365     int i_duplicate = 1, i;
1366     picture_t *p_pic;
1367     *out = NULL;
1368
1369     while( (p_pic = id->p_decoder->pf_decode_video( id->p_decoder, &in )) )
1370     {
1371         subpicture_t *p_subpic = 0;
1372
1373         if( p_sys->b_audio_sync )
1374         {
1375             mtime_t i_video_drift;
1376             mtime_t i_master_drift = p_sys->i_master_drift;
1377             mtime_t i_pts;
1378
1379             if( !id->i_initial_pts ) id->i_initial_pts = p_pic->date;
1380
1381             if( !i_master_drift )
1382             {
1383                 /* No audio track ? */
1384                 i_master_drift = id->i_initial_pts;
1385             }
1386
1387             i_pts = date_Get( &id->interpolated_pts ) + 1;
1388             i_video_drift = p_pic->date - i_pts;
1389             i_duplicate = 1;
1390
1391             /* Set the pts of the frame being encoded */
1392             p_pic->date = i_pts;
1393
1394             if( i_video_drift < i_master_drift - 50000 )
1395             {
1396                 msg_Dbg( p_stream, "dropping frame (%i)",
1397                          (int)(i_video_drift - i_master_drift) );
1398                 return VLC_EGENERIC;
1399             }
1400             else if( i_video_drift > i_master_drift + 50000 )
1401             {
1402                 msg_Dbg( p_stream, "adding frame (%i)",
1403                          (int)(i_video_drift - i_master_drift) );
1404                 i_duplicate = 2;
1405             }
1406
1407             date_Increment( &id->interpolated_pts, 1 );
1408         }
1409
1410         if( !id->p_encoder->p_module )
1411         {
1412             if( transcode_video_encoder_open( p_stream, id ) != VLC_SUCCESS )
1413             {
1414                 transcode_video_close( p_stream, id );
1415                 id->b_transcode = VLC_FALSE;
1416                 return VLC_EGENERIC;
1417             }
1418
1419             /* Deinterlace */
1420             if( p_stream->p_sys->b_deinterlace )
1421             {
1422                 id->pp_filter[id->i_filter] =
1423                     vlc_object_create( p_stream, VLC_OBJECT_FILTER );
1424                 vlc_object_attach( id->pp_filter[id->i_filter], p_stream );
1425
1426                 id->pp_filter[id->i_filter]->pf_vout_buffer_new =
1427                     video_new_buffer;
1428                 id->pp_filter[id->i_filter]->pf_vout_buffer_del =
1429                     video_del_buffer;
1430
1431                 id->pp_filter[id->i_filter]->fmt_in = id->p_decoder->fmt_out;
1432                 id->pp_filter[id->i_filter]->fmt_out = id->p_decoder->fmt_out;
1433                 id->pp_filter[id->i_filter]->p_module =
1434                     module_Need( id->pp_filter[id->i_filter],
1435                                  "video filter2", "deinterlace", 0 );
1436                 if( id->pp_filter[id->i_filter]->p_module ) id->i_filter++;
1437                 else
1438                 {
1439                     msg_Dbg( p_stream, "no video filter found" );
1440                     vlc_object_detach( id->pp_filter[id->i_filter] );
1441                     vlc_object_destroy( id->pp_filter[id->i_filter] );
1442                 }
1443             }
1444
1445             /* Check if we need a filter for chroma conversion or resizing */
1446             if( id->p_decoder->fmt_out.video.i_chroma !=
1447                 id->p_encoder->fmt_in.video.i_chroma ||
1448                 id->p_decoder->fmt_out.video.i_width !=
1449                 id->p_encoder->fmt_out.video.i_width ||
1450                 id->p_decoder->fmt_out.video.i_height !=
1451                 id->p_encoder->fmt_out.video.i_height ||
1452                 p_sys->i_crop_top > 0 || p_sys->i_crop_bottom > 0 ||
1453                 p_sys->i_crop_left > 0 || p_sys->i_crop_right > 0 )
1454             {
1455                 id->pp_filter[id->i_filter] =
1456                     vlc_object_create( p_stream, VLC_OBJECT_FILTER );
1457                 vlc_object_attach( id->pp_filter[id->i_filter], p_stream );
1458
1459                 id->pp_filter[id->i_filter]->pf_vout_buffer_new =
1460                     video_new_buffer;
1461                 id->pp_filter[id->i_filter]->pf_vout_buffer_del =
1462                     video_del_buffer;
1463
1464                 id->pp_filter[id->i_filter]->fmt_in = id->p_decoder->fmt_out;
1465                 id->pp_filter[id->i_filter]->fmt_out = id->p_encoder->fmt_in;
1466                 id->pp_filter[id->i_filter]->p_module =
1467                     module_Need( id->pp_filter[id->i_filter],
1468                                  "video filter2", 0, 0 );
1469                 if( id->pp_filter[id->i_filter]->p_module ) id->i_filter++;
1470                 else
1471                 {
1472                     msg_Dbg( p_stream, "no video filter found" );
1473                     vlc_object_detach( id->pp_filter[id->i_filter] );
1474                     vlc_object_destroy( id->pp_filter[id->i_filter] );
1475
1476                     transcode_video_close( p_stream, id );
1477                     id->b_transcode = VLC_FALSE;
1478                     return VLC_EGENERIC;
1479                 }
1480             }
1481         }
1482
1483         /* Run filter chain */
1484         for( i = 0; i < id->i_filter; i++ )
1485         {
1486             p_pic = id->pp_filter[i]->pf_video_filter(id->pp_filter[i], p_pic);
1487         }
1488
1489         /*
1490          * Encoding
1491          */
1492
1493         /* Check if we have a subpicture to overlay */
1494         if( p_sys->p_filter_blend )
1495         {
1496             p_subpic = transcode_spu_get( p_stream, id, p_pic->date );
1497             /* TODO: get another pic */
1498         }
1499
1500         /* Overlay subpicture */
1501         if( p_subpic )
1502         {
1503             int i_width, i_height;
1504
1505             p_sys->p_filter_blend->fmt_out = id->p_encoder->fmt_in;
1506             p_sys->p_filter_blend->fmt_out.video.i_visible_width =
1507                 p_sys->p_filter_blend->fmt_out.video.i_width;
1508             p_sys->p_filter_blend->fmt_out.video.i_visible_height =
1509                 p_sys->p_filter_blend->fmt_out.video.i_height;
1510             p_sys->p_filter_blend->fmt_out.video.i_chroma =
1511                 VLC_FOURCC('I','4','2','0');
1512
1513             i_width = id->p_encoder->fmt_in.video.i_width;
1514             i_height = id->p_encoder->fmt_in.video.i_height;
1515
1516             if( p_pic->i_refcount )
1517             {
1518                 /* We can't modify the picture, we need to duplicate it */
1519                 picture_t *p_tmp =
1520                     video_new_buffer( (decoder_t *)p_sys->p_filter_blend );
1521                 if( p_tmp )
1522                 {
1523                     int i, j;
1524                     for( i = 0; i < p_pic->i_planes; i++ )
1525                     {
1526                         for( j = 0; j < p_pic->p[i].i_visible_lines; j++ )
1527                         {
1528                             memcpy( p_tmp->p[i].p_pixels + j *
1529                                     p_tmp->p[i].i_pitch,
1530                                     p_pic->p[i].p_pixels + j *
1531                                     p_pic->p[i].i_pitch,
1532                                     p_tmp->p[i].i_visible_pitch );
1533                         }
1534                     }
1535                     p_tmp->date = p_pic->date;
1536                     p_tmp->b_force = p_pic->b_force;
1537                     p_tmp->i_nb_fields = p_pic->i_nb_fields;
1538                     p_tmp->b_progressive = p_pic->b_progressive;
1539                     p_tmp->b_top_field_first = p_pic->b_top_field_first;
1540                     p_pic->pf_release( p_pic );
1541                     p_pic = p_tmp;
1542                 }
1543             }
1544
1545             while( p_subpic != NULL )
1546             {
1547                 subpicture_region_t *p_region = p_subpic->p_region;
1548
1549                 while( p_region && p_sys->p_filter_blend &&
1550                        p_sys->p_filter_blend->pf_video_blend )
1551                 {
1552                     int i_x_offset = p_region->i_x + p_subpic->i_x;
1553                     int i_y_offset = p_region->i_y + p_subpic->i_y;
1554
1555                     if( p_subpic->i_flags & OSD_ALIGN_BOTTOM )
1556                     {
1557                         i_y_offset = i_height - p_region->fmt.i_height -
1558                             p_subpic->i_y;
1559                     }
1560                     else if ( !(p_subpic->i_flags & OSD_ALIGN_TOP) )
1561                     {
1562                         i_y_offset = i_height / 2 - p_region->fmt.i_height / 2;
1563                     }
1564
1565                     if( p_subpic->i_flags & OSD_ALIGN_RIGHT )
1566                     {
1567                         i_x_offset = i_width - p_region->fmt.i_width -
1568                             p_subpic->i_x;
1569                     }
1570                     else if ( !(p_subpic->i_flags & OSD_ALIGN_LEFT) )
1571                     {
1572                         i_x_offset = i_width / 2 - p_region->fmt.i_width / 2;
1573                     }
1574
1575                     if( p_subpic->b_absolute )
1576                     {
1577                         i_x_offset = p_region->i_x + p_subpic->i_x;
1578                         i_y_offset = p_region->i_y + p_subpic->i_y;
1579                     }
1580
1581                     p_sys->p_filter_blend->fmt_in.video = p_region->fmt;
1582
1583                     p_sys->p_filter_blend->pf_video_blend(
1584                          p_sys->p_filter_blend, p_pic, p_pic,
1585                          &p_region->picture, i_x_offset, i_y_offset );
1586
1587                     p_region = p_region->p_next;
1588                 }
1589
1590                 p_subpic = p_subpic->p_next;
1591             }
1592         }
1593
1594         if( p_sys->i_threads >= 1 )
1595         {
1596             vlc_mutex_lock( &p_sys->lock_out );
1597             p_sys->pp_pics[p_sys->i_last_pic++] = p_pic;
1598             p_sys->i_last_pic %= PICTURE_RING_SIZE;
1599             *out = p_sys->p_buffers;
1600             p_sys->p_buffers = NULL;
1601             vlc_cond_signal( &p_sys->cond );
1602             vlc_mutex_unlock( &p_sys->lock_out );
1603         }
1604         else
1605         {
1606             block_t *p_block;
1607             p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
1608             block_ChainAppend( out, p_block );
1609
1610             if( p_sys->b_audio_sync && i_duplicate > 1 )
1611             {
1612                 mtime_t i_pts = date_Get( &id->interpolated_pts ) + 1;
1613                 date_Increment( &id->interpolated_pts, 1 );
1614                 p_pic->date = i_pts;
1615                 p_block = id->p_encoder->pf_encode_video(id->p_encoder, p_pic);
1616                 block_ChainAppend( out, p_block );
1617             }
1618
1619             p_pic->pf_release( p_pic );
1620         }
1621     }
1622
1623     return VLC_SUCCESS;
1624 }
1625
1626 static int EncoderThread( sout_stream_sys_t *p_sys )
1627 {
1628     sout_stream_id_t *id = p_sys->id_video;
1629     picture_t *p_pic;
1630     int i_plane;
1631
1632     while( !p_sys->b_die && !p_sys->b_error )
1633     {
1634         block_t *p_block;
1635
1636         vlc_mutex_lock( &p_sys->lock_out );
1637         while( p_sys->i_last_pic == p_sys->i_first_pic )
1638         {
1639             vlc_cond_wait( &p_sys->cond, &p_sys->lock_out );
1640             if( p_sys->b_die || p_sys->b_error ) break;
1641         }
1642         if( p_sys->b_die || p_sys->b_error )
1643         {
1644             vlc_mutex_unlock( &p_sys->lock_out );
1645             break;
1646         }
1647
1648         p_pic = p_sys->pp_pics[p_sys->i_first_pic++];
1649         p_sys->i_first_pic %= PICTURE_RING_SIZE;
1650         vlc_mutex_unlock( &p_sys->lock_out );
1651
1652         p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
1653         vlc_mutex_lock( &p_sys->lock_out );
1654         block_ChainAppend( &p_sys->p_buffers, p_block );
1655         vlc_mutex_unlock( &p_sys->lock_out );
1656
1657         for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
1658         {
1659             free( p_pic->p[i_plane].p_pixels );
1660         }
1661         free( p_pic );
1662     }
1663
1664     while( p_sys->i_last_pic != p_sys->i_first_pic )
1665     {
1666         p_pic = p_sys->pp_pics[p_sys->i_first_pic++];
1667         p_sys->i_first_pic %= PICTURE_RING_SIZE;
1668
1669         for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
1670         {
1671             free( p_pic->p[i_plane].p_pixels );
1672         }
1673         free( p_pic );
1674     }
1675
1676     block_ChainRelease( p_sys->p_buffers );
1677
1678     return 0;
1679 }
1680
1681 struct picture_sys_t
1682 {
1683     decoder_t *p_dec;
1684 };
1685
1686 static void video_release_buffer( picture_t *p_pic )
1687 {
1688     if( p_pic && !p_pic->i_refcount && p_pic->pf_release && p_pic->p_sys )
1689     {
1690         video_del_buffer( p_pic->p_sys->p_dec, p_pic );
1691     }
1692     else if( p_pic && p_pic->i_refcount > 0 ) p_pic->i_refcount--;
1693 }
1694
1695 static picture_t *video_new_buffer( decoder_t *p_dec )
1696 {
1697     picture_t *p_pic = malloc( sizeof(picture_t) );
1698
1699     p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
1700     vout_AllocatePicture( VLC_OBJECT(p_dec), p_pic,
1701                           p_dec->fmt_out.video.i_chroma,
1702                           p_dec->fmt_out.video.i_width,
1703                           p_dec->fmt_out.video.i_height,
1704                           p_dec->fmt_out.video.i_aspect );
1705
1706     if( !p_pic->i_planes )
1707     {
1708         free( p_pic );
1709         return 0;
1710     }
1711
1712     p_pic->pf_release = video_release_buffer;
1713     p_pic->p_sys = malloc( sizeof(picture_sys_t) );
1714     p_pic->p_sys->p_dec = p_dec;
1715
1716     return p_pic;
1717 }
1718
1719 static void video_del_buffer( decoder_t *p_dec, picture_t *p_pic )
1720 {
1721     if( p_pic && p_pic->p_data ) free( p_pic->p_data );
1722     if( p_pic && p_pic->p_sys ) free( p_pic->p_sys );
1723     if( p_pic ) free( p_pic );
1724 }
1725
1726 static void video_link_picture( decoder_t *p_dec, picture_t *p_pic )
1727 {
1728     p_pic->i_refcount++;
1729 }
1730
1731 static void video_unlink_picture( decoder_t *p_dec, picture_t *p_pic )
1732 {
1733     video_release_buffer( p_pic );
1734 }
1735
1736 /*
1737  * SPU
1738  */
1739 static subpicture_t *spu_new_buffer( decoder_t * );
1740 static void spu_del_buffer( decoder_t *, subpicture_t * );
1741
1742 static int transcode_spu_new( sout_stream_t *p_stream, sout_stream_id_t *id )
1743 {
1744     sout_stream_sys_t *p_sys = p_stream->p_sys;
1745
1746     /*
1747      * Open decoder
1748      */
1749
1750     /* Initialization of decoder structures */
1751     id->p_decoder->pf_spu_buffer_new = spu_new_buffer;
1752     id->p_decoder->pf_spu_buffer_del = spu_del_buffer;
1753     //id->p_decoder->p_cfg = p_sys->p_spu_cfg;
1754
1755     id->p_decoder->p_module =
1756         module_Need( id->p_decoder, "decoder", "$codec", 0 );
1757
1758     if( !id->p_decoder->p_module )
1759     {
1760         msg_Err( p_stream, "cannot find decoder" );
1761         return VLC_EGENERIC;
1762     }
1763
1764     if( !p_sys->b_soverlay )
1765     {
1766         /*
1767          * Open encoder
1768          */
1769
1770         /* Initialization of encoder format structures */
1771         es_format_Init( &id->p_encoder->fmt_in, id->p_decoder->fmt_in.i_cat,
1772                         id->p_decoder->fmt_in.i_codec );
1773
1774         id->p_encoder->p_cfg = p_sys->p_spu_cfg;
1775
1776         id->p_encoder->p_module =
1777             module_Need( id->p_encoder, "encoder", p_sys->psz_senc, VLC_TRUE );
1778
1779         if( !id->p_encoder->p_module )
1780         {
1781             module_Unneed( id->p_decoder, id->p_decoder->p_module );
1782             msg_Err( p_stream, "cannot find encoder" );
1783             return VLC_EGENERIC;
1784         }
1785     }
1786     else
1787     {
1788         p_sys->p_filter_blend =
1789             vlc_object_create( p_stream, VLC_OBJECT_FILTER );
1790         vlc_object_attach( p_sys->p_filter_blend, p_stream );
1791         p_sys->p_filter_blend->fmt_out.video.i_chroma =
1792             VLC_FOURCC('I','4','2','0');
1793         p_sys->p_filter_blend->fmt_in.video.i_chroma =
1794             VLC_FOURCC('Y','U','V','A');
1795         p_sys->p_filter_blend->p_module =
1796             module_Need( p_sys->p_filter_blend, "video blending", 0, 0 );
1797     }
1798
1799     return VLC_SUCCESS;
1800 }
1801
1802 static void transcode_spu_close( sout_stream_t *p_stream, sout_stream_id_t *id)
1803 {
1804     sout_stream_sys_t *p_sys = p_stream->p_sys;
1805     int i;
1806
1807     /* Close decoder */
1808     if( id->p_decoder->p_module )
1809         module_Unneed( id->p_decoder, id->p_decoder->p_module );
1810
1811     /* Close encoder */
1812     if( id->p_encoder->p_module )
1813         module_Unneed( id->p_encoder, id->p_encoder->p_module );
1814
1815     /* Free subpictures */
1816     for( i = 0; i < SUBPICTURE_RING_SIZE; i++ )
1817     {
1818         if( !p_sys->pp_subpics[i] ) continue;
1819
1820         spu_del_buffer( id->p_decoder, p_sys->pp_subpics[i] );
1821         p_sys->pp_subpics[i] = NULL;
1822     }
1823 }
1824
1825 static int transcode_spu_process( sout_stream_t *p_stream,
1826                                   sout_stream_id_t *id,
1827                                   block_t *in, block_t **out )
1828 {
1829     sout_stream_sys_t *p_sys = p_stream->p_sys;
1830     subpicture_t *p_subpic;
1831     *out = NULL;
1832
1833     p_subpic = id->p_decoder->pf_decode_sub( id->p_decoder, &in );
1834     if( p_subpic && p_sys->b_soverlay )
1835     {
1836         int i;
1837
1838         /* Find a free slot in our supictures ring buffer */
1839         for( i = 0; i < SUBPICTURE_RING_SIZE; i++ )
1840         {
1841             if( !p_sys->pp_subpics[i] )
1842             {
1843                 p_sys->pp_subpics[i] = p_subpic;
1844                 break;
1845             }
1846         }
1847         if( i == SUBPICTURE_RING_SIZE )
1848         {
1849             spu_del_buffer( id->p_decoder, p_subpic );
1850         }
1851     }
1852
1853     if(  p_subpic && !p_sys->b_soverlay )
1854     {
1855         block_t *p_block;
1856
1857         p_block = id->p_encoder->pf_encode_sub( id->p_encoder, p_subpic );
1858         spu_del_buffer( id->p_decoder, p_subpic );
1859
1860         if( p_block )
1861         {
1862             block_ChainAppend( out, p_block );
1863             return VLC_SUCCESS;
1864         }
1865     }
1866
1867     return VLC_EGENERIC;
1868 }
1869
1870 static subpicture_t *transcode_spu_get( sout_stream_t *p_stream,
1871                                         sout_stream_id_t *id,
1872                                         mtime_t display_date )
1873 {
1874     sout_stream_sys_t *p_sys = p_stream->p_sys;
1875     subpicture_t *p_subpic = 0;
1876     subpicture_t *p_ephemer = 0;
1877     subpicture_t **pp_subpic = &p_subpic;
1878     int i;
1879
1880     /* Find current subpictures and remove old ones */
1881     for( i = 0; i < SUBPICTURE_RING_SIZE; i++ )
1882     {
1883         if( !p_sys->pp_subpics[i] ) continue;
1884
1885         if( !p_sys->pp_subpics[i]->b_ephemer &&
1886             p_sys->pp_subpics[i]->i_stop < display_date )
1887         {
1888             spu_del_buffer( id->p_decoder, p_sys->pp_subpics[i] );
1889             p_sys->pp_subpics[i] = NULL;
1890             continue;
1891         }
1892
1893         if( p_sys->pp_subpics[i]->i_start > display_date ) continue;
1894
1895         if( p_sys->pp_subpics[i]->b_ephemer && !p_ephemer )
1896         {
1897             p_ephemer = p_sys->pp_subpics[i];
1898         }
1899         else if( p_sys->pp_subpics[i]->b_ephemer )
1900         {
1901             if( p_ephemer->i_start < p_sys->pp_subpics[i]->i_start )
1902             {
1903                 subpicture_t tmp;
1904                 tmp = *p_ephemer;
1905                 *p_ephemer = *p_sys->pp_subpics[i];
1906                 *p_sys->pp_subpics[i] = tmp;
1907             }
1908
1909             spu_del_buffer( id->p_decoder, p_sys->pp_subpics[i] );
1910             p_sys->pp_subpics[i] = NULL;
1911             continue;
1912         }
1913
1914         /* Add subpicture to the list */
1915         *pp_subpic = p_sys->pp_subpics[i];
1916         pp_subpic = &p_sys->pp_subpics[i]->p_next;
1917     }
1918
1919     return p_subpic;
1920 }
1921
1922 static subpicture_t *spu_new_buffer( decoder_t *p_dec )
1923 {
1924     subpicture_t *p_subpic = (subpicture_t *)malloc(sizeof(subpicture_t));
1925     memset( p_subpic, 0, sizeof(subpicture_t) );
1926     p_subpic->b_absolute = VLC_TRUE;
1927
1928     p_subpic->pf_create_region = __spu_CreateRegion;
1929     p_subpic->pf_destroy_region = __spu_DestroyRegion;
1930
1931     return p_subpic;
1932 }
1933
1934 static void spu_del_buffer( decoder_t *p_dec, subpicture_t *p_subpic )
1935 {
1936     while( p_subpic->p_region )
1937     {
1938         subpicture_region_t *p_region = p_subpic->p_region;
1939         p_subpic->p_region = p_region->p_next;
1940         p_subpic->pf_destroy_region( VLC_OBJECT(p_dec), p_region );
1941     }
1942
1943     free( p_subpic );
1944 }