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