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

   1 /*****************************************************************************
   2  * transcode.c
   3  *****************************************************************************
   4  * Copyright (C) 2001, 2002 VideoLAN
   5  * $Id: transcode.c,v 1.54 2003/11/27 10:34:51 gbazin Exp $
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *          Gildas Bazin <gbazin@netcourrier.com>
   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
  37 /* ffmpeg header */
  38 #ifdef HAVE_FFMPEG_AVCODEC_H
  39 #   include <ffmpeg/avcodec.h>
  40 #else
  41 #   include <avcodec.h>
  42 #endif
  43
  44 /*****************************************************************************
  45  * Exported prototypes
  46  *****************************************************************************/
  47 static int      Open    ( vlc_object_t * );
  48 static void     Close   ( vlc_object_t * );
  49
  50 static sout_stream_id_t *Add ( sout_stream_t *, es_format_t * );
  51 static int               Del ( sout_stream_t *, sout_stream_id_t * );
  52 static int               Send( sout_stream_t *, sout_stream_id_t *, sout_buffer_t* );
  53
  54 static int  transcode_audio_ffmpeg_new    ( sout_stream_t *, sout_stream_id_t * );
  55 static void transcode_audio_ffmpeg_close  ( sout_stream_t *, sout_stream_id_t * );
  56 static int  transcode_audio_ffmpeg_process( sout_stream_t *, sout_stream_id_t *, sout_buffer_t *, sout_buffer_t ** );
  57
  58 static int  transcode_video_ffmpeg_new    ( sout_stream_t *, sout_stream_id_t * );
  59 static void transcode_video_ffmpeg_close  ( sout_stream_t *, sout_stream_id_t * );
  60 static int  transcode_video_ffmpeg_process( sout_stream_t *, sout_stream_id_t *, sout_buffer_t *, sout_buffer_t ** );
  61
  62 static int  transcode_video_ffmpeg_getframebuf( struct AVCodecContext *, AVFrame *);
  63
  64 static int pi_channels_maps[6] =
  65 {
  66     0,
  67     AOUT_CHAN_CENTER,   AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
  68     AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
  69     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT
  70      | AOUT_CHAN_REARRIGHT,
  71     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
  72      | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
  73 };
  74
  75 /*****************************************************************************
  76  * Module descriptor
  77  *****************************************************************************/
  78 vlc_module_begin();
  79     set_description( _("Transcode stream") );
  80     set_capability( "sout stream", 50 );
  81     add_shortcut( "transcode" );
  82     set_callbacks( Open, Close );
  83 vlc_module_end();
  84
  85 struct sout_stream_sys_t
  86 {
  87     sout_stream_t   *p_out;
  88
  89     vlc_fourcc_t    i_acodec;   /* codec audio (0 if not transcode) */
  90     int             i_sample_rate;
  91     int             i_channels;
  92     int             i_abitrate;
  93
  94     vlc_fourcc_t    i_vcodec;   /*    "   video  " "   "      " */
  95     int             i_vbitrate;
  96     int             i_vtolerance;
  97     int             i_width;
  98     int             i_height;
  99     int             i_b_frames;
 100     int             i_key_int;
 101     int             i_qmin;
 102     int             i_qmax;
 103     vlc_bool_t      i_hq;
 104     vlc_bool_t      b_deinterlace;
 105
 106     int             i_crop_top;
 107     int             i_crop_bottom;
 108     int             i_crop_right;
 109     int             i_crop_left;
 110
 111     mtime_t         i_input_pts;
 112     mtime_t         i_output_pts;
 113 };
 114
 115 /*****************************************************************************
 116  * Open:
 117  *****************************************************************************/
 118 static int Open( vlc_object_t *p_this )
 119 {
 120     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 121     sout_stream_sys_t *p_sys;
 122     char *codec;
 123
 124     p_sys = malloc( sizeof( sout_stream_sys_t ) );
 125     p_sys->p_out = sout_stream_new( p_stream->p_sout, p_stream->psz_next );
 126
 127     p_sys->i_acodec      = 0;
 128     p_sys->i_sample_rate = 0;
 129     p_sys->i_channels    = 0;
 130     p_sys->i_abitrate    = 0;
 131
 132     p_sys->i_vcodec     = 0;
 133     p_sys->i_vbitrate   = 0;
 134     p_sys->i_vtolerance = -1;
 135     p_sys->i_width      = 0;
 136     p_sys->i_height     = 0;
 137     p_sys->i_key_int    = -1;
 138     p_sys->i_b_frames   = 0;
 139     p_sys->i_qmin       = 2;
 140     p_sys->i_qmax       = 31;
 141 #if LIBAVCODEC_BUILD >= 4673
 142     p_sys->i_hq         = FF_MB_DECISION_SIMPLE;
 143 #else
 144     p_sys->i_hq         = VLC_FALSE;
 145 #endif
 146     p_sys->b_deinterlace= VLC_FALSE;
 147
 148     p_sys->i_crop_top   = 0;
 149     p_sys->i_crop_bottom= 0;
 150     p_sys->i_crop_right = 0;
 151     p_sys->i_crop_left  = 0;
 152
 153     if( ( codec = sout_cfg_find_value( p_stream->p_cfg, "acodec" ) ) )
 154     {
 155         char fcc[4] = "    ";
 156         char *val;
 157
 158         memcpy( fcc, codec, __MIN( strlen( codec ), 4 ) );
 159
 160         p_sys->i_acodec = VLC_FOURCC( fcc[0], fcc[1], fcc[2], fcc[3] );
 161
 162         if( ( val = sout_cfg_find_value( p_stream->p_cfg, "samplerate" ) ) )
 163         {
 164             p_sys->i_sample_rate = atoi( val );
 165         }
 166         if( ( val = sout_cfg_find_value( p_stream->p_cfg, "channels" ) ) )
 167         {
 168             p_sys->i_channels = atoi( val );
 169         }
 170         if( ( val = sout_cfg_find_value( p_stream->p_cfg, "ab" ) ) )
 171         {
 172             p_sys->i_abitrate = atoi( val );
 173             if( p_sys->i_abitrate < 4000 )
 174             {
 175                 p_sys->i_abitrate *= 1000;
 176             }
 177         }
 178
 179         msg_Dbg( p_stream, "codec audio=%4.4s %dHz %d channels %dKb/s", fcc,
 180                  p_sys->i_sample_rate, p_sys->i_channels,
 181                  p_sys->i_abitrate / 1024 );
 182     }
 183
 184     if( ( codec = sout_cfg_find_value( p_stream->p_cfg, "vcodec" ) ) )
 185     {
 186         char fcc[4] = "    ";
 187         char *val;
 188
 189         memcpy( fcc, codec, __MIN( strlen( codec ), 4 ) );
 190
 191         p_sys->i_vcodec = VLC_FOURCC( fcc[0], fcc[1], fcc[2], fcc[3] );
 192
 193         if( ( val = sout_cfg_find_value( p_stream->p_cfg, "width" ) ) )
 194         {
 195             p_sys->i_width = atoi( val );
 196         }
 197         if( ( val = sout_cfg_find_value( p_stream->p_cfg, "height" ) ) )
 198         {
 199             p_sys->i_height = atoi( val );
 200         }
 201         if( ( val = sout_cfg_find_value( p_stream->p_cfg, "vb" ) ) )
 202         {
 203             p_sys->i_vbitrate = atoi( val );
 204             if( p_sys->i_vbitrate < 16000 )
 205             {
 206                 p_sys->i_vbitrate *= 1000;
 207             }
 208         }
 209         if( ( val = sout_cfg_find_value( p_stream->p_cfg, "vt" ) ) )
 210         {
 211             p_sys->i_vtolerance = atoi( val );
 212         }
 213         if( sout_cfg_find( p_stream->p_cfg, "deinterlace" ) )
 214         {
 215             p_sys->b_deinterlace = VLC_TRUE;
 216         }
 217         /* crop */
 218         if( ( val = sout_cfg_find_value( p_stream->p_cfg, "croptop" ) ) )
 219         {
 220             p_sys->i_crop_top = atoi( val );
 221         }
 222         if( ( val = sout_cfg_find_value( p_stream->p_cfg, "cropbottom" ) ) )
 223         {
 224             p_sys->i_crop_bottom = atoi( val );
 225         }
 226         if( ( val = sout_cfg_find_value( p_stream->p_cfg, "cropleft" ) ) )
 227         {
 228             p_sys->i_crop_left = atoi( val );
 229         }
 230         if( ( val = sout_cfg_find_value( p_stream->p_cfg, "cropright" ) ) )
 231         {
 232             p_sys->i_crop_right = atoi( val );
 233         }
 234         if( ( val = sout_cfg_find_value( p_stream->p_cfg, "keyint" ) ) )
 235         {
 236             p_sys->i_key_int    = atoi( val );
 237         }
 238         if( ( val = sout_cfg_find_value( p_stream->p_cfg, "bframes" ) ) )
 239         {
 240             p_sys->i_b_frames   = atoi( val );
 241         }
 242 #if LIBAVCODEC_BUILD >= 4673
 243         if( ( val = sout_cfg_find_value( p_stream->p_cfg, "hq" ) ) )
 244         {
 245             if( !strcmp( val, "rd" ) )
 246             {
 247                 p_sys->i_hq = FF_MB_DECISION_RD;
 248             }
 249             else if( !strcmp( val, "bits" ) )
 250             {
 251                 p_sys->i_hq = FF_MB_DECISION_BITS;
 252             }
 253             else if( !strcmp( val, "simple" ) )
 254             {
 255                 p_sys->i_hq = FF_MB_DECISION_SIMPLE;
 256             }
 257             else
 258             {
 259                 p_sys->i_hq = FF_MB_DECISION_RD;
 260             }
 261         }
 262 #else
 263         if( sout_cfg_find( p_stream->p_cfg, "hq" ) )
 264         {
 265             p_sys->i_hq = VLC_TRUE;
 266         }
 267 #endif
 268         if( ( val = sout_cfg_find_value( p_stream->p_cfg, "qmin" ) ) )
 269         {
 270             p_sys->i_qmin   = atoi( val );
 271         }
 272         if( ( val = sout_cfg_find_value( p_stream->p_cfg, "qmax" ) ) )
 273         {
 274             p_sys->i_qmax   = atoi( val );
 275         }
 276
 277         msg_Dbg( p_stream, "codec video=%4.4s %dx%d %dkb/s",
 278                  fcc,
 279                  p_sys->i_width, p_sys->i_height,
 280                  p_sys->i_vbitrate / 1024 );
 281     }
 282
 283     if( !p_sys->p_out )
 284     {
 285         msg_Err( p_stream, "cannot create chain" );
 286         free( p_sys );
 287         return VLC_EGENERIC;
 288     }
 289     p_stream->pf_add    = Add;
 290     p_stream->pf_del    = Del;
 291     p_stream->pf_send   = Send;
 292
 293     p_stream->p_sys     = p_sys;
 294
 295     avcodec_init();
 296     avcodec_register_all();
 297
 298     /* ffmpeg needs some padding at the end of each buffer */
 299     p_stream->p_sout->i_padding += FF_INPUT_BUFFER_PADDING_SIZE;
 300
 301     return VLC_SUCCESS;
 302 }
 303
 304 /*****************************************************************************
 305  * Close:
 306  *****************************************************************************/
 307 static void Close( vlc_object_t * p_this )
 308 {
 309     sout_stream_t       *p_stream = (sout_stream_t*)p_this;
 310     sout_stream_sys_t   *p_sys = p_stream->p_sys;
 311
 312     sout_stream_delete( p_sys->p_out );
 313     free( p_sys );
 314 }
 315
 316 struct sout_stream_id_t
 317 {
 318     vlc_fourcc_t  b_transcode;
 319     es_format_t f_src;        /* only if transcoding */
 320     es_format_t f_dst;        /*  "   "      " */
 321     unsigned int  i_inter_pixfmt; /* intermediary format when transcoding */
 322
 323     /* id of the out stream */
 324     void *id;
 325
 326     /* Encoder */
 327     encoder_t       *p_encoder;
 328     vlc_fourcc_t    b_enc_inited;
 329
 330     /* ffmpeg part */
 331     AVCodec         *ff_dec;
 332     AVCodecContext  *ff_dec_c;
 333
 334     mtime_t         i_dts;
 335     mtime_t         i_length;
 336
 337     int             i_buffer;
 338     int             i_buffer_pos;
 339     uint8_t         *p_buffer;
 340
 341     AVFrame         *p_ff_pic;
 342     AVFrame         *p_ff_pic_tmp0; /* to do deinterlace */
 343     AVFrame         *p_ff_pic_tmp1; /* to do pix conversion */
 344     AVFrame         *p_ff_pic_tmp2; /* to do resample */
 345
 346     ImgReSampleContext *p_vresample;
 347 };
 348
 349
 350 static sout_stream_id_t * Add( sout_stream_t *p_stream, es_format_t *p_fmt )
 351 {
 352     sout_stream_sys_t   *p_sys = p_stream->p_sys;
 353     sout_stream_id_t    *id;
 354
 355     id = malloc( sizeof( sout_stream_id_t ) );
 356     id->i_dts = 0;
 357     id->id = NULL;
 358     id->p_encoder = NULL;
 359
 360     if( p_fmt->i_cat == AUDIO_ES && p_sys->i_acodec != 0 )
 361     {
 362         msg_Dbg( p_stream,
 363                  "creating audio transcoding from fcc=`%4.4s' to fcc=`%4.4s'",
 364                  (char*)&p_fmt->i_codec,
 365                  (char*)&p_sys->i_acodec );
 366
 367         /* src format */
 368         memcpy( &id->f_src, p_fmt, sizeof( es_format_t ) );
 369
 370         /* create dst format */
 371         id->f_dst.i_cat    = AUDIO_ES;
 372         id->f_dst.i_codec = p_sys->i_acodec;
 373         id->f_dst.audio.i_rate = p_sys->i_sample_rate  > 0 ? p_sys->i_sample_rate : id->f_src.audio.i_rate;
 374         id->f_dst.audio.i_channels    = p_sys->i_channels > 0 ? p_sys->i_channels : id->f_src.audio.i_channels;
 375         id->f_dst.i_bitrate     = p_sys->i_abitrate > 0 ? p_sys->i_abitrate : 64000;
 376         id->f_dst.audio.i_blockalign = 0;
 377         id->f_dst.i_extra  = 0;
 378         id->f_dst.p_extra  = NULL;
 379
 380         /* build decoder -> filter -> encoder */
 381         if( transcode_audio_ffmpeg_new( p_stream, id ) )
 382         {
 383             msg_Err( p_stream, "cannot create audio chain" );
 384             free( id );
 385             return NULL;
 386         }
 387
 388         /* open output stream */
 389         id->id = p_sys->p_out->pf_add( p_sys->p_out, &id->f_dst );
 390         id->b_transcode = VLC_TRUE;
 391
 392         if( id->id == NULL )
 393         {
 394             free( id );
 395             return NULL;
 396         }
 397     }
 398     else if( p_fmt->i_cat == VIDEO_ES && p_sys->i_vcodec != 0 )
 399     {
 400         msg_Dbg( p_stream,
 401                  "creating video transcoding from fcc=`%4.4s' to fcc=`%4.4s'",
 402                  (char*)&p_fmt->i_codec,
 403                  (char*)&p_sys->i_vcodec );
 404
 405         memcpy( &id->f_src, p_fmt, sizeof( es_format_t ) );
 406
 407         /* create dst format */
 408         id->f_dst.i_cat         = VIDEO_ES;
 409         id->f_dst.i_codec       = p_sys->i_vcodec;
 410         id->f_dst.video.i_width = p_sys->i_width ; /* > 0 ? p_sys->i_width : id->f_src.i_width; */
 411         id->f_dst.video.i_height= p_sys->i_height; /* > 0 ? p_sys->i_height: id->f_src.i_height; */
 412         id->f_dst.i_bitrate     = p_sys->i_vbitrate > 0 ? p_sys->i_vbitrate : 800*1000;
 413         id->f_dst.i_extra       = 0;
 414         id->f_dst.p_extra       = NULL;
 415
 416         /* build decoder -> filter -> encoder */
 417         if( transcode_video_ffmpeg_new( p_stream, id ) )
 418         {
 419             msg_Err( p_stream, "cannot create video chain" );
 420             free( id );
 421             return NULL;
 422         }
 423 #if 0
 424         /* open output stream */
 425         id->id = p_sys->p_out->pf_add( p_sys->p_out, &id->f_dst );
 426 #endif
 427         id->b_transcode = VLC_TRUE;
 428     }
 429     else
 430     {
 431         msg_Dbg( p_stream, "not transcoding a stream (fcc=`%4.4s')", (char*)&p_fmt->i_codec );
 432         id->id = p_sys->p_out->pf_add( p_sys->p_out, p_fmt );
 433         id->b_transcode = VLC_FALSE;
 434
 435         if( id->id == NULL )
 436         {
 437             free( id );
 438             return NULL;
 439         }
 440     }
 441
 442     return id;
 443 }
 444
 445 static int     Del      ( sout_stream_t *p_stream, sout_stream_id_t *id )
 446 {
 447     sout_stream_sys_t   *p_sys = p_stream->p_sys;
 448
 449     if( id->b_transcode )
 450     {
 451         if( id->f_src.i_cat == AUDIO_ES )
 452         {
 453             transcode_audio_ffmpeg_close( p_stream, id );
 454         }
 455         else if( id->f_src.i_cat == VIDEO_ES )
 456         {
 457             transcode_video_ffmpeg_close( p_stream, id );
 458         }
 459     }
 460
 461     if( id->id ) p_sys->p_out->pf_del( p_sys->p_out, id->id );
 462     free( id );
 463
 464     return VLC_SUCCESS;
 465 }
 466
 467 static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
 468                  sout_buffer_t *p_buffer )
 469 {
 470     sout_stream_sys_t   *p_sys = p_stream->p_sys;
 471
 472     if( id->b_transcode )
 473     {
 474         sout_buffer_t *p_buffer_out;
 475         if( id->f_src.i_cat == AUDIO_ES )
 476         {
 477             transcode_audio_ffmpeg_process( p_stream, id, p_buffer, &p_buffer_out );
 478         }
 479         else if( id->f_src.i_cat == VIDEO_ES )
 480         {
 481             transcode_video_ffmpeg_process( p_stream, id, p_buffer, &p_buffer_out );
 482         }
 483         sout_BufferDelete( p_stream->p_sout, p_buffer );
 484
 485         if( p_buffer_out )
 486         {
 487             return p_sys->p_out->pf_send( p_sys->p_out, id->id, p_buffer_out );
 488         }
 489         return VLC_SUCCESS;
 490     }
 491     else if( id->id != NULL )
 492     {
 493         return p_sys->p_out->pf_send( p_sys->p_out, id->id, p_buffer );
 494     }
 495     else
 496     {
 497         sout_BufferDelete( p_stream->p_sout, p_buffer );
 498         return VLC_EGENERIC;
 499     }
 500 }
 501
 502 /****************************************************************************
 503  * ffmpeg decoder reencocdr part
 504  ****************************************************************************/
 505
 506 static struct
 507 {
 508     vlc_fourcc_t i_fcc;
 509     int          i_ff_codec;
 510 } fourcc_to_ff_code[] =
 511 {
 512     /* audio */
 513     { VLC_FOURCC( 'm', 'p', 'g', 'a' ), CODEC_ID_MP2 },
 514     { VLC_FOURCC( 'm', 'p', '3', ' ' ), CODEC_ID_MP3LAME },
 515     { VLC_FOURCC( 'm', 'p', '4', 'a' ), CODEC_ID_AAC },
 516     { VLC_FOURCC( 'a', '5', '2', ' ' ), CODEC_ID_AC3 },
 517     { VLC_FOURCC( 'a', 'c', '3', ' ' ), CODEC_ID_AC3 },
 518     { VLC_FOURCC( 'w', 'm', 'a', '1' ), CODEC_ID_WMAV1 },
 519     { VLC_FOURCC( 'w', 'm', 'a', '2' ), CODEC_ID_WMAV2 },
 520     { VLC_FOURCC( 'v', 'o', 'r', 'b' ), CODEC_ID_VORBIS },
 521     { VLC_FOURCC( 'a', 'l', 'a', 'w' ), CODEC_ID_PCM_ALAW },
 522
 523     /* video */
 524     { VLC_FOURCC( 'm', 'p', 'g', 'v' ), CODEC_ID_MPEG1VIDEO },
 525     { VLC_FOURCC( 'm', 'p', '1', 'v' ), CODEC_ID_MPEG1VIDEO },
 526 #if LIBAVCODEC_BUILD >= 4676
 527     { VLC_FOURCC( 'm', 'p', '2', 'v' ), CODEC_ID_MPEG2VIDEO },
 528 #endif
 529     { VLC_FOURCC( 'm', 'p', '4', 'v'),  CODEC_ID_MPEG4 },
 530     { VLC_FOURCC( 'D', 'I', 'V', '1' ), CODEC_ID_MSMPEG4V1 },
 531     { VLC_FOURCC( 'D', 'I', 'V', '2' ), CODEC_ID_MSMPEG4V2 },
 532     { VLC_FOURCC( 'D', 'I', 'V', '3' ), CODEC_ID_MSMPEG4V3 },
 533     { VLC_FOURCC( 'H', '2', '6', '3' ), CODEC_ID_H263 },
 534     { VLC_FOURCC( 'I', '2', '6', '3' ), CODEC_ID_H263I },
 535     { VLC_FOURCC( 'h', 'u', 'f', 'f' ), CODEC_ID_HUFFYUV },
 536     { VLC_FOURCC( 'W', 'M', 'V', '1' ), CODEC_ID_WMV1 },
 537     { VLC_FOURCC( 'W', 'M', 'V', '2' ), CODEC_ID_WMV2 },
 538     { VLC_FOURCC( 'M', 'J', 'P', 'G' ), CODEC_ID_MJPEG },
 539     { VLC_FOURCC( 'm', 'j', 'p', 'b' ), CODEC_ID_MJPEGB },
 540     { VLC_FOURCC( 'd', 'v', 's', 'l' ), CODEC_ID_DVVIDEO },
 541     { VLC_FOURCC( 'S', 'V', 'Q', '1' ), CODEC_ID_SVQ1 },
 542 #if LIBAVCODEC_BUILD >= 4666
 543     { VLC_FOURCC( 'S', 'V', 'Q', '3' ), CODEC_ID_SVQ3 },
 544 #endif
 545
 546     /* raw video code, only used for 'encoding' */
 547     { VLC_FOURCC( 'I', '4', '2', '0' ), CODEC_ID_RAWVIDEO },
 548     { VLC_FOURCC( 'I', '4', '2', '2' ), CODEC_ID_RAWVIDEO },
 549     { VLC_FOURCC( 'I', '4', '4', '4' ), CODEC_ID_RAWVIDEO },
 550     { VLC_FOURCC( 'R', 'V', '1', '5' ), CODEC_ID_RAWVIDEO },
 551     { VLC_FOURCC( 'R', 'V', '1', '6' ), CODEC_ID_RAWVIDEO },
 552     { VLC_FOURCC( 'R', 'V', '2', '4' ), CODEC_ID_RAWVIDEO },
 553     { VLC_FOURCC( 'R', 'V', '3', '2' ), CODEC_ID_RAWVIDEO },
 554     { VLC_FOURCC( 'Y', 'U', 'Y', '2' ), CODEC_ID_RAWVIDEO },
 555
 556     { VLC_FOURCC(   0,   0,   0,   0 ), 0 }
 557 };
 558
 559 static inline int get_ff_codec( vlc_fourcc_t i_fcc )
 560 {
 561     int i;
 562
 563     for( i = 0; fourcc_to_ff_code[i].i_fcc != 0; i++ )
 564     {
 565         if( fourcc_to_ff_code[i].i_fcc == i_fcc )
 566         {
 567             return fourcc_to_ff_code[i].i_ff_codec;
 568         }
 569     }
 570
 571     return 0;
 572 }
 573
 574 static inline int get_ff_chroma( vlc_fourcc_t i_chroma )
 575 {
 576     switch( i_chroma )
 577     {
 578         case VLC_FOURCC( 'I', '4', '2', '0' ):
 579             return PIX_FMT_YUV420P;
 580         case VLC_FOURCC( 'I', '4', '2', '2' ):
 581             return PIX_FMT_YUV422P;
 582         case VLC_FOURCC( 'I', '4', '4', '4' ):
 583             return PIX_FMT_YUV444P;
 584         case VLC_FOURCC( 'R', 'V', '1', '5' ):
 585             return PIX_FMT_RGB555;
 586         case VLC_FOURCC( 'R', 'V', '1', '6' ):
 587             return PIX_FMT_RGB565;
 588         case VLC_FOURCC( 'R', 'V', '2', '4' ):
 589             return PIX_FMT_RGB24;
 590         case VLC_FOURCC( 'R', 'V', '3', '2' ):
 591             return PIX_FMT_RGBA32;
 592         case VLC_FOURCC( 'G', 'R', 'E', 'Y' ):
 593             return PIX_FMT_GRAY8;
 594         case VLC_FOURCC( 'Y', 'U', 'Y', '2' ):
 595             return PIX_FMT_YUV422;
 596         default:
 597             return 0;
 598     }
 599 }
 600
 601 static inline vlc_fourcc_t get_vlc_chroma( int i_pix_fmt )
 602 {
 603     switch( i_pix_fmt )
 604     {
 605     case PIX_FMT_YUV420P:
 606         return VLC_FOURCC('I','4','2','0');
 607     case PIX_FMT_YUV422P:
 608         return VLC_FOURCC('I','4','2','2');
 609     case PIX_FMT_YUV444P:
 610         return VLC_FOURCC('I','4','4','4');
 611
 612     case PIX_FMT_YUV422:
 613         return VLC_FOURCC('Y','U','Y','2');
 614
 615     case PIX_FMT_RGB555:
 616         return VLC_FOURCC('R','V','1','5');
 617     case PIX_FMT_RGB565:
 618         return VLC_FOURCC('R','V','1','6');
 619     case PIX_FMT_RGB24:
 620         return VLC_FOURCC('R','V','2','4');
 621     case PIX_FMT_RGBA32:
 622         return VLC_FOURCC('R','V','3','2');
 623     case PIX_FMT_GRAY8:
 624         return VLC_FOURCC('G','R','E','Y');
 625
 626     case PIX_FMT_YUV410P:
 627     case PIX_FMT_YUV411P:
 628     case PIX_FMT_BGR24:
 629     default:
 630         return 0;
 631     }
 632 }
 633
 634 static int transcode_audio_ffmpeg_new( sout_stream_t *p_stream,
 635                                        sout_stream_id_t *id )
 636 {
 637     int i_ff_codec;
 638
 639     if( id->f_src.i_codec == VLC_FOURCC('s','1','6','l') ||
 640         id->f_src.i_codec == VLC_FOURCC('s','1','6','b') ||
 641         id->f_src.i_codec == VLC_FOURCC('s','8',' ',' ') ||
 642         id->f_src.i_codec == VLC_FOURCC('u','8',' ',' ') )
 643     {
 644         id->ff_dec = NULL;
 645
 646         id->ff_dec_c = avcodec_alloc_context();
 647         id->ff_dec_c->sample_rate = id->f_src.audio.i_rate;
 648         id->ff_dec_c->channels    = id->f_src.audio.i_channels;
 649         id->ff_dec_c->block_align = id->f_src.audio.i_blockalign;
 650         id->ff_dec_c->bit_rate    = id->f_src.i_bitrate;
 651     }
 652     else
 653     {
 654         /* find decoder */
 655         i_ff_codec = get_ff_codec( id->f_src.i_codec );
 656         if( i_ff_codec == 0 )
 657         {
 658             msg_Err( p_stream, "cannot find decoder id" );
 659             return VLC_EGENERIC;
 660         }
 661
 662         id->ff_dec = avcodec_find_decoder( i_ff_codec );
 663         if( !id->ff_dec )
 664         {
 665             msg_Err( p_stream, "cannot find decoder (avcodec)" );
 666             return VLC_EGENERIC;
 667         }
 668
 669         id->ff_dec_c = avcodec_alloc_context();
 670         id->ff_dec_c->sample_rate = id->f_src.audio.i_rate;
 671         id->ff_dec_c->channels    = id->f_src.audio.i_channels;
 672         id->ff_dec_c->block_align = id->f_src.audio.i_blockalign;
 673         id->ff_dec_c->bit_rate    = id->f_src.i_bitrate;
 674
 675         id->ff_dec_c->extradata_size = id->f_src.i_extra;
 676         id->ff_dec_c->extradata      = id->f_src.p_extra;
 677         if( avcodec_open( id->ff_dec_c, id->ff_dec ) )
 678         {
 679             msg_Err( p_stream, "cannot open decoder" );
 680             return VLC_EGENERIC;
 681         }
 682     }
 683
 684     id->i_buffer     = 2 * AVCODEC_MAX_AUDIO_FRAME_SIZE;
 685     id->i_buffer_pos = 0;
 686     id->p_buffer     = malloc( id->i_buffer );
 687
 688     /* Sanity check for audio channels */
 689     id->f_dst.audio.i_channels = __MIN( id->f_dst.audio.i_channels, id->f_src.audio.i_channels );
 690
 691     /* find encoder */
 692     id->p_encoder = vlc_object_create( p_stream, VLC_OBJECT_ENCODER );
 693
 694     /* Initialization of encoder format structures */
 695     es_format_Init( &id->p_encoder->fmt_in, AUDIO_ES, AOUT_FMT_S16_NE );
 696     id->p_encoder->fmt_in.audio.i_format = AOUT_FMT_S16_NE;
 697     id->p_encoder->fmt_in.audio.i_rate = id->f_dst.audio.i_rate;
 698     id->p_encoder->fmt_in.audio.i_physical_channels =
 699         id->p_encoder->fmt_in.audio.i_original_channels =
 700             pi_channels_maps[id->f_dst.audio.i_channels];
 701     id->p_encoder->fmt_in.audio.i_channels = id->f_dst.audio.i_channels;
 702
 703     id->p_encoder->fmt_out = id->p_encoder->fmt_in;
 704     id->p_encoder->fmt_out.i_codec = id->f_dst.i_codec;
 705     id->p_encoder->fmt_out.i_bitrate = id->f_dst.i_bitrate;
 706
 707     id->p_encoder->p_module =
 708         module_Need( id->p_encoder, "encoder", NULL );
 709     if( !id->p_encoder->p_module )
 710     {
 711         vlc_object_destroy( id->p_encoder );
 712         msg_Err( p_stream, "cannot open encoder" );
 713         return VLC_EGENERIC;
 714     }
 715
 716     id->b_enc_inited = VLC_FALSE;
 717
 718     id->f_dst.i_extra = id->p_encoder->fmt_out.i_extra;
 719     id->f_dst.p_extra = id->p_encoder->fmt_out.p_extra;
 720
 721     /* Hack for mp3 transcoding support */
 722     if( id->f_dst.i_codec == VLC_FOURCC( 'm','p','3',' ' ) )
 723     {
 724         id->f_dst.i_codec = VLC_FOURCC( 'm','p','g','a' );
 725     }
 726
 727     return VLC_SUCCESS;
 728 }
 729
 730 static void transcode_audio_ffmpeg_close( sout_stream_t *p_stream,
 731                                           sout_stream_id_t *id )
 732 {
 733     if( id->ff_dec )
 734     {
 735         avcodec_close( id->ff_dec_c );
 736         free( id->ff_dec_c );
 737     }
 738
 739     module_Unneed( id->p_encoder, id->p_encoder->p_module );
 740     vlc_object_destroy( id->p_encoder );
 741
 742     free( id->p_buffer );
 743 }
 744
 745 static int transcode_audio_ffmpeg_process( sout_stream_t *p_stream,
 746                                            sout_stream_id_t *id,
 747                                            sout_buffer_t *in,
 748                                            sout_buffer_t **out )
 749 {
 750     aout_buffer_t aout_buf;
 751     block_t *p_block;
 752     int i_buffer = in->i_size;
 753     char *p_buffer = in->p_buffer;
 754     id->i_dts = in->i_dts;
 755     *out = NULL;
 756
 757     while( i_buffer )
 758     {
 759         id->i_buffer_pos = 0;
 760
 761         /* decode as much data as possible */
 762         if( id->ff_dec )
 763         {
 764             int i_used;
 765
 766             i_used = avcodec_decode_audio( id->ff_dec_c,
 767                          (int16_t*)id->p_buffer, &id->i_buffer_pos,
 768                          p_buffer, i_buffer );
 769
 770 #if 0
 771             msg_Warn( p_stream, "avcodec_decode_audio: %d used on %d",
 772                       i_used, i_buffer );
 773 #endif
 774             if( i_used < 0 )
 775             {
 776                 msg_Warn( p_stream, "error audio decoding");
 777                 break;
 778             }
 779
 780             i_buffer -= i_used;
 781             p_buffer += i_used;
 782         }
 783         else
 784         {
 785             int16_t *sout = (int16_t*)id->p_buffer;
 786
 787             if( id->f_src.i_codec == VLC_FOURCC( 's', '8', ' ', ' ' ) ||
 788                 id->f_src.i_codec == VLC_FOURCC( 'u', '8', ' ', ' ' ) )
 789             {
 790                 int8_t *sin = (int8_t*)p_buffer;
 791                 int i_used = __MIN( id->i_buffer/2, i_buffer );
 792                 int i_samples = i_used;
 793
 794                 if( id->f_src.i_codec == VLC_FOURCC( 's', '8', ' ', ' ' ) )
 795                     while( i_samples > 0 )
 796                     {
 797                         *sout++ = ( *sin++ ) << 8;
 798                         i_samples--;
 799                     }
 800                 else
 801                     while( i_samples > 0 )
 802                     {
 803                         *sout++ = ( *sin++ - 128 ) << 8;
 804                         i_samples--;
 805                     }
 806
 807                 i_buffer -= i_used;
 808                 p_buffer += i_used;
 809                 id->i_buffer_pos = i_used * 2;
 810             }
 811             else if( id->f_src.i_codec == VLC_FOURCC( 's', '1', '6', 'l' ) ||
 812                      id->f_src.i_codec == VLC_FOURCC( 's', '1', '6', 'b' ) )
 813             {
 814                 int16_t *sin = (int16_t*)p_buffer;
 815                 int i_used = __MIN( id->i_buffer, i_buffer );
 816                 int i_samples = i_used / 2;
 817                 int b_invert_indianness;
 818
 819                 if( id->f_src.i_codec == VLC_FOURCC( 's', '1', '6', 'l' ) )
 820 #ifdef WORDS_BIGENDIAN
 821                     b_invert_indianness = 1;
 822 #else
 823                     b_invert_indianness = 0;
 824 #endif
 825                 else
 826 #ifdef WORDS_BIGENDIAN
 827                     b_invert_indianness = 0;
 828 #else
 829                     b_invert_indianness = 1;
 830 #endif
 831
 832                 if( b_invert_indianness )
 833                 {
 834                     while( i_samples > 0 )
 835                     {
 836                         uint8_t tmp[2];
 837
 838                         tmp[1] = *sin++;
 839                         tmp[0] = *sin++;
 840                         *sout++ = *(int16_t*)tmp;
 841                         i_samples--;
 842                     }
 843                 }
 844                 else
 845                 {
 846                     memcpy( sout, sin, i_used );
 847                     sout += i_samples;
 848                 }
 849
 850                 i_buffer -= i_used;
 851                 p_buffer += i_used;
 852                 id->i_buffer_pos = i_used;
 853             }
 854         }
 855
 856         if( id->i_buffer_pos == 0 ) continue;
 857
 858         /* Encode as much data as possible */
 859         if( !id->b_enc_inited && id->p_encoder->pf_header )
 860         {
 861             p_block = id->p_encoder->pf_header( id->p_encoder );
 862             while( p_block )
 863             {
 864                 sout_buffer_t *p_out;
 865                 block_t *p_prev_block = p_block;
 866
 867                 p_out = sout_BufferNew( p_stream->p_sout, p_block->i_buffer );
 868                 memcpy( p_out->p_buffer, p_block->p_buffer, p_block->i_buffer);
 869                 p_out->i_dts = p_out->i_pts = in->i_dts;
 870                 p_out->i_length = 0;
 871                 sout_BufferChain( out, p_out );
 872
 873                 p_block = p_block->p_next;
 874                 block_Release( p_prev_block );
 875             }
 876
 877             id->b_enc_inited = VLC_TRUE;
 878         }
 879
 880         aout_buf.p_buffer = id->p_buffer;
 881         aout_buf.i_nb_bytes = id->i_buffer_pos;
 882         aout_buf.i_nb_samples = id->i_buffer_pos / 2 / id->f_src.audio.i_channels;
 883         aout_buf.start_date = id->i_dts;
 884         aout_buf.end_date = id->i_dts;
 885
 886         id->i_dts += ( I64C(1000000) * id->i_buffer_pos / 2 /
 887             id->f_src.audio.i_channels / id->f_src.audio.i_rate );
 888
 889         if( id->f_src.audio.i_channels !=
 890             id->p_encoder->fmt_in.audio.i_channels )
 891         {
 892             int i, j;
 893
 894             /* dumb downmixing */
 895             for( i = 0; i < aout_buf.i_nb_samples; i++ )
 896             {
 897                 uint16_t *p_buffer = aout_buf.p_buffer;
 898                 for( j = 0 ; j < id->p_encoder->fmt_in.audio.i_channels; j++ )
 899                 {
 900                     p_buffer[i*id->p_encoder->fmt_in.audio.i_channels+j] =
 901                         p_buffer[i*id->f_src.audio.i_channels+j];
 902                 }
 903             }
 904             aout_buf.i_nb_bytes = i*id->p_encoder->fmt_in.audio.i_channels * 2;
 905         }
 906
 907         p_block = id->p_encoder->pf_encode_audio( id->p_encoder, &aout_buf );
 908         while( p_block )
 909         {
 910             sout_buffer_t *p_out;
 911             block_t *p_prev_block = p_block;
 912
 913             p_out = sout_BufferNew( p_stream->p_sout, p_block->i_buffer );
 914             memcpy( p_out->p_buffer, p_block->p_buffer, p_block->i_buffer);
 915             p_out->i_dts = p_block->i_dts;
 916             p_out->i_pts = p_block->i_pts;
 917             p_out->i_length = p_block->i_length;
 918             sout_BufferChain( out, p_out );
 919
 920             p_block = p_block->p_next;
 921             block_Release( p_prev_block );
 922         }
 923     }
 924
 925     return VLC_SUCCESS;
 926 }
 927
 928
 929 /*
 930  * video
 931  */
 932 static int transcode_video_ffmpeg_new( sout_stream_t *p_stream,
 933                                        sout_stream_id_t *id )
 934 {
 935     sout_stream_sys_t   *p_sys = p_stream->p_sys;
 936
 937     int i_ff_codec;
 938
 939     /* Open decoder */
 940     if( id->f_src.i_codec == VLC_FOURCC( 'I', '4', '2', '0' ) ||
 941         id->f_src.i_codec == VLC_FOURCC( 'I', '4', '2', '2' ) ||
 942         id->f_src.i_codec == VLC_FOURCC( 'I', '4', '4', '4' ) ||
 943         id->f_src.i_codec == VLC_FOURCC( 'Y', 'U', 'Y', '2' ) ||
 944         id->f_src.i_codec == VLC_FOURCC( 'R', 'V', '1', '5' ) ||
 945         id->f_src.i_codec == VLC_FOURCC( 'R', 'V', '1', '6' ) ||
 946         id->f_src.i_codec == VLC_FOURCC( 'R', 'V', '2', '4' ) ||
 947         id->f_src.i_codec == VLC_FOURCC( 'R', 'V', '3', '2' ) ||
 948         id->f_src.i_codec == VLC_FOURCC( 'G', 'R', 'E', 'Y' ) )
 949     {
 950         id->ff_dec              = NULL;
 951         id->ff_dec_c            = avcodec_alloc_context();
 952         id->ff_dec_c->width     = id->f_src.video.i_width;
 953         id->ff_dec_c->height    = id->f_src.video.i_height;
 954         id->ff_dec_c->pix_fmt   = get_ff_chroma( id->f_src.i_codec );
 955     }
 956     else
 957     {
 958         /* find decoder */
 959         i_ff_codec = get_ff_codec( id->f_src.i_codec );
 960         if( i_ff_codec == 0 )
 961         {
 962             msg_Err( p_stream, "cannot find decoder" );
 963             return VLC_EGENERIC;
 964         }
 965
 966         id->ff_dec = avcodec_find_decoder( i_ff_codec );
 967         if( !id->ff_dec )
 968         {
 969             msg_Err( p_stream, "cannot find decoder" );
 970             return VLC_EGENERIC;
 971         }
 972
 973         id->ff_dec_c = avcodec_alloc_context();
 974         id->ff_dec_c->width         = id->f_src.video.i_width;
 975         id->ff_dec_c->height        = id->f_src.video.i_height;
 976         /* id->ff_dec_c->bit_rate      = id->f_src.i_bitrate; */
 977         id->ff_dec_c->extradata_size= id->f_src.i_extra;
 978         id->ff_dec_c->extradata     = id->f_src.p_extra;
 979         id->ff_dec_c->workaround_bugs = FF_BUG_AUTODETECT;
 980         id->ff_dec_c->error_resilience= -1;
 981         id->ff_dec_c->get_buffer    = transcode_video_ffmpeg_getframebuf;
 982         id->ff_dec_c->opaque        = p_sys;
 983
 984         if( avcodec_open( id->ff_dec_c, id->ff_dec ) < 0 )
 985         {
 986             msg_Err( p_stream, "cannot open decoder" );
 987             return VLC_EGENERIC;
 988         }
 989
 990         if( i_ff_codec == CODEC_ID_MPEG4 && id->ff_dec_c->extradata_size > 0 )
 991         {
 992             int b_gotpicture;
 993             AVFrame frame;
 994             uint8_t *p_vol = malloc( id->ff_dec_c->extradata_size +
 995                                      FF_INPUT_BUFFER_PADDING_SIZE );
 996
 997             memcpy( p_vol, id->ff_dec_c->extradata,
 998                     id->ff_dec_c->extradata_size );
 999             memset( p_vol + id->ff_dec_c->extradata_size, 0,
1000                     FF_INPUT_BUFFER_PADDING_SIZE );
1001
1002             avcodec_decode_video( id->ff_dec_c, &frame, &b_gotpicture,
1003                                   id->ff_dec_c->extradata,
1004                                   id->ff_dec_c->extradata_size );
1005             free( p_vol );
1006         }
1007     }
1008
1009     /* Open encoder */
1010     id->p_encoder = vlc_object_create( p_stream, VLC_OBJECT_ENCODER );
1011
1012     /* Initialization of encoder format structures */
1013     es_format_Init( &id->p_encoder->fmt_in,
1014                     id->f_src.i_cat, get_vlc_chroma(id->ff_dec_c->pix_fmt) );
1015
1016     id->p_encoder->fmt_in.video.i_width = id->f_dst.video.i_width;
1017     id->p_encoder->fmt_in.video.i_height = id->f_dst.video.i_height;
1018
1019     if( id->p_encoder->fmt_in.video.i_width <= 0 )
1020     {
1021         id->p_encoder->fmt_in.video.i_width = id->f_dst.video.i_width =
1022             id->ff_dec_c->width - p_sys->i_crop_left - p_sys->i_crop_right;
1023     }
1024     if( id->p_encoder->fmt_in.video.i_height <= 0 )
1025     {
1026         id->p_encoder->fmt_in.video.i_height = id->f_dst.video.i_height =
1027             id->ff_dec_c->height - p_sys->i_crop_top - p_sys->i_crop_bottom;
1028     }
1029
1030     id->p_encoder->fmt_in.video.i_frame_rate = 25; /* FIXME as it break mpeg */
1031     id->p_encoder->fmt_in.video.i_frame_rate_base= 1;
1032     if( id->ff_dec )
1033     {
1034         id->p_encoder->fmt_in.video.i_frame_rate = id->ff_dec_c->frame_rate;
1035 #if LIBAVCODEC_BUILD >= 4662
1036         id->p_encoder->fmt_in.video.i_frame_rate_base =
1037             id->ff_dec_c->frame_rate_base;
1038 #endif
1039
1040 #if LIBAVCODEC_BUILD >= 4687
1041         id->p_encoder->fmt_in.video.i_aspect = VOUT_ASPECT_FACTOR *
1042             ( av_q2d(id->ff_dec_c->sample_aspect_ratio) *
1043               id->ff_dec_c->width / id->ff_dec_c->height );
1044 #else
1045         id->p_encoder->fmt_in.video.i_aspect = VOUT_ASPECT_FACTOR *
1046             id->ff_dec_c->aspect_ratio;
1047 #endif
1048
1049     }
1050
1051     id->p_encoder->fmt_out = id->p_encoder->fmt_in;
1052     id->p_encoder->fmt_out.i_codec = id->f_dst.i_codec;
1053     id->p_encoder->fmt_out.i_bitrate = id->f_dst.i_bitrate;
1054
1055     id->p_encoder->i_vtolerance = p_sys->i_vtolerance;
1056     id->p_encoder->i_key_int = p_sys->i_key_int;
1057     id->p_encoder->i_b_frames = p_sys->i_b_frames;
1058     id->p_encoder->i_qmin = p_sys->i_qmin;
1059     id->p_encoder->i_qmax = p_sys->i_qmax;
1060     id->p_encoder->i_hq = p_sys->i_hq;
1061
1062     id->p_ff_pic         = avcodec_alloc_frame();
1063     id->p_ff_pic_tmp0    = NULL;
1064     id->p_ff_pic_tmp1    = NULL;
1065     id->p_ff_pic_tmp2    = NULL;
1066     id->p_vresample      = NULL;
1067
1068     id->p_encoder->p_module =
1069         module_Need( id->p_encoder, "encoder", NULL );
1070
1071     if( !id->p_encoder->p_module )
1072     {
1073         vlc_object_destroy( id->p_encoder );
1074         msg_Err( p_stream, "cannot find encoder" );
1075         return VLC_EGENERIC;
1076     }
1077
1078     /* Close the encoder.
1079      * We'll open it only when we have the first frame */
1080     module_Unneed( id->p_encoder, id->p_encoder->p_module );
1081
1082     id->b_enc_inited = VLC_FALSE;
1083
1084     return VLC_SUCCESS;
1085 }
1086
1087 static void transcode_video_ffmpeg_close ( sout_stream_t *p_stream,
1088                                            sout_stream_id_t *id )
1089 {
1090     /* Close decoder */
1091     if( id->ff_dec )
1092     {
1093         avcodec_close( id->ff_dec_c );
1094         free( id->ff_dec_c );
1095     }
1096
1097     /* Close encoder */
1098     module_Unneed( id->p_encoder, id->p_encoder->p_module );
1099     vlc_object_destroy( id->p_encoder );
1100
1101     /* Misc cleanup */
1102     if( id->p_ff_pic)
1103     {
1104         free( id->p_ff_pic );
1105     }
1106
1107     if( id->p_ff_pic_tmp0 )
1108     {
1109         free( id->p_ff_pic_tmp0->data[0] );
1110         free( id->p_ff_pic_tmp0 );
1111     }
1112     if( id->p_ff_pic_tmp1)
1113     {
1114         free( id->p_ff_pic_tmp1->data[0] );
1115         free( id->p_ff_pic_tmp1 );
1116     }
1117     if( id->p_ff_pic_tmp2)
1118     {
1119         free( id->p_ff_pic_tmp2->data[0] );
1120         free( id->p_ff_pic_tmp2 );
1121     }
1122     if( id->p_vresample )
1123     {
1124         free( id->p_vresample );
1125     }
1126 }
1127
1128 static int transcode_video_ffmpeg_process( sout_stream_t *p_stream,
1129                sout_stream_id_t *id, sout_buffer_t *in, sout_buffer_t **out )
1130 {
1131     sout_stream_sys_t   *p_sys = p_stream->p_sys;
1132     int     i_used;
1133     int     b_gotpicture;
1134     AVFrame *frame;
1135
1136     int     i_data;
1137     uint8_t *p_data;
1138
1139     *out = NULL;
1140
1141     i_data = in->i_size;
1142     p_data = in->p_buffer;
1143
1144     for( ;; )
1145     {
1146         block_t *p_block;
1147         picture_t pic;
1148         int i_plane;
1149
1150         /* decode frame */
1151         frame = id->p_ff_pic;
1152         p_sys->i_input_pts = in->i_pts;
1153        if( id->ff_dec )
1154         {
1155             i_used = avcodec_decode_video( id->ff_dec_c, frame,
1156                                            &b_gotpicture,
1157                                            p_data, i_data );
1158         }
1159         else
1160         {
1161             /* raw video */
1162             avpicture_fill( (AVPicture*)frame,
1163                             p_data,
1164                             id->ff_dec_c->pix_fmt,
1165                             id->ff_dec_c->width, id->ff_dec_c->height );
1166             i_used = i_data;
1167             b_gotpicture = 1;
1168
1169             /* Set PTS */
1170             frame->pts = p_sys->i_input_pts;
1171         }
1172
1173         if( i_used < 0 )
1174         {
1175             msg_Warn( p_stream, "error");
1176             return VLC_EGENERIC;
1177         }
1178         i_data -= i_used;
1179         p_data += i_used;
1180
1181         if( !b_gotpicture )
1182         {
1183             return VLC_SUCCESS;
1184         }
1185
1186         /* Get the pts of the decoded frame if any, otherwise keep the
1187          * interpolated one */
1188         if( frame->pts > 0 )
1189         {
1190             p_sys->i_output_pts = frame->pts;
1191         }
1192
1193         if( !id->b_enc_inited )
1194         {
1195             /* XXX hack because of copy packetizer and mpeg4video that can fail
1196              * detecting size */
1197             if( id->p_encoder->fmt_in.video.i_width <= 0 )
1198             {
1199                 id->p_encoder->fmt_in.video.i_width =
1200                   id->p_encoder->fmt_out.video.i_width = id->f_dst.video.i_width =
1201                     id->ff_dec_c->width - p_sys->i_crop_left -
1202                       p_sys->i_crop_right;
1203             }
1204             if( id->p_encoder->fmt_in.video.i_height <= 0 )
1205             {
1206                 id->p_encoder->fmt_in.video.i_height =
1207                   id->p_encoder->fmt_out.video.i_height = id->f_dst.video.i_height =
1208                     id->ff_dec_c->height - p_sys->i_crop_top -
1209                       p_sys->i_crop_bottom;
1210             }
1211
1212             id->p_encoder->fmt_out.i_extra = 0;
1213             id->p_encoder->fmt_out.p_extra = NULL;
1214
1215             id->p_encoder->p_module =
1216                 module_Need( id->p_encoder, "encoder", NULL );
1217             if( !id->p_encoder->p_module )
1218             {
1219                 vlc_object_destroy( id->p_encoder );
1220                 msg_Err( p_stream, "cannot find encoder" );
1221                 return VLC_EGENERIC;
1222             }
1223
1224             id->f_dst.i_extra = id->p_encoder->fmt_out.i_extra;
1225             id->f_dst.p_extra = id->p_encoder->fmt_out.p_extra;
1226
1227             /* Hack for mp2v/mp1v transcoding support */
1228             if( id->f_dst.i_codec == VLC_FOURCC( 'm','p','1','v' ) ||
1229                 id->f_dst.i_codec == VLC_FOURCC( 'm','p','2','v' ) )
1230             {
1231                 id->f_dst.i_codec = VLC_FOURCC( 'm','p','g','v' );
1232             }
1233
1234             if( !( id->id =
1235                      p_stream->p_sys->p_out->pf_add( p_stream->p_sys->p_out,
1236                                                      &id->f_dst ) ) )
1237             {
1238                 msg_Err( p_stream, "cannot add this stream" );
1239                 transcode_video_ffmpeg_close( p_stream, id );
1240                 id->b_transcode = VLC_FALSE;
1241                 return VLC_EGENERIC;
1242             }
1243
1244             while( id->p_encoder->pf_header &&
1245                    (p_block = id->p_encoder->pf_header( id->p_encoder )) )
1246             {
1247                 sout_buffer_t *p_out;
1248                 p_out = sout_BufferNew( p_stream->p_sout, p_block->i_buffer );
1249                 memcpy( p_out->p_buffer, p_block->p_buffer, p_block->i_buffer);
1250                 p_out->i_dts = in->i_dts;
1251                 p_out->i_pts = in->i_dts;
1252                 p_out->i_length = 0;
1253                 sout_BufferChain( out, p_out );
1254             }
1255
1256             id->i_inter_pixfmt =
1257                 get_ff_chroma( id->p_encoder->fmt_in.i_codec );
1258
1259             id->b_enc_inited = VLC_TRUE;
1260         }
1261
1262         /* deinterlace */
1263         if( p_stream->p_sys->b_deinterlace )
1264         {
1265             if( id->p_ff_pic_tmp0 == NULL )
1266             {
1267                 int     i_size;
1268                 uint8_t *buf;
1269                 id->p_ff_pic_tmp0 = avcodec_alloc_frame();
1270                 i_size = avpicture_get_size( id->ff_dec_c->pix_fmt,
1271                                              id->ff_dec_c->width, id->ff_dec_c->height );
1272
1273                 buf = malloc( i_size );
1274
1275                 avpicture_fill( (AVPicture*)id->p_ff_pic_tmp0, buf,
1276                                 id->i_inter_pixfmt,
1277                                 id->ff_dec_c->width, id->ff_dec_c->height );
1278             }
1279
1280             avpicture_deinterlace( (AVPicture*)id->p_ff_pic_tmp0, (AVPicture*)frame,
1281                                    id->ff_dec_c->pix_fmt,
1282                                    id->ff_dec_c->width, id->ff_dec_c->height );
1283
1284             frame = id->p_ff_pic_tmp0;
1285         }
1286
1287         /* convert pix format */
1288         if( id->ff_dec_c->pix_fmt != id->i_inter_pixfmt )
1289         {
1290             if( id->p_ff_pic_tmp1 == NULL )
1291             {
1292                 int     i_size;
1293                 uint8_t *buf;
1294                 id->p_ff_pic_tmp1 = avcodec_alloc_frame();
1295                 i_size = avpicture_get_size( id->i_inter_pixfmt,
1296                                              id->ff_dec_c->width,
1297                                              id->ff_dec_c->height );
1298
1299                 buf = malloc( i_size );
1300
1301                 avpicture_fill( (AVPicture*)id->p_ff_pic_tmp1, buf,
1302                                 id->i_inter_pixfmt,
1303                                 id->ff_dec_c->width, id->ff_dec_c->height );
1304             }
1305
1306             img_convert( (AVPicture*)id->p_ff_pic_tmp1, id->i_inter_pixfmt,
1307                          (AVPicture*)frame, id->ff_dec_c->pix_fmt,
1308                          id->ff_dec_c->width, id->ff_dec_c->height );
1309
1310             frame = id->p_ff_pic_tmp1;
1311         }
1312
1313         /* convert size and crop */
1314         if( id->ff_dec_c->width  != id->f_dst.video.i_width ||
1315             id->ff_dec_c->height != id->f_dst.video.i_height ||
1316             p_sys->i_crop_top > 0 || p_sys->i_crop_bottom > 0 ||
1317             p_sys->i_crop_left > 0 || p_sys->i_crop_right )
1318         {
1319             if( id->p_ff_pic_tmp2 == NULL )
1320             {
1321                 int     i_size;
1322                 uint8_t *buf;
1323                 id->p_ff_pic_tmp2 = avcodec_alloc_frame();
1324                 i_size = avpicture_get_size( id->i_inter_pixfmt,
1325                                              id->f_dst.video.i_width,
1326                                              id->f_dst.video.i_height );
1327
1328                 buf = malloc( i_size );
1329
1330                 avpicture_fill( (AVPicture*)id->p_ff_pic_tmp2, buf,
1331                                 id->i_inter_pixfmt,
1332                                 id->f_dst.video.i_width, id->f_dst.video.i_height );
1333
1334                 id->p_vresample =
1335                     img_resample_full_init( id->f_dst.video.i_width,
1336                                             id->f_dst.video.i_height,
1337                                             id->ff_dec_c->width, id->ff_dec_c->height,
1338                                             p_stream->p_sys->i_crop_top,
1339                                             p_stream->p_sys->i_crop_bottom,
1340                                             p_stream->p_sys->i_crop_left,
1341                                             p_stream->p_sys->i_crop_right );
1342             }
1343
1344             img_resample( id->p_vresample, (AVPicture*)id->p_ff_pic_tmp2,
1345                           (AVPicture*)frame );
1346
1347             frame = id->p_ff_pic_tmp2;
1348         }
1349
1350         /* Encoding */
1351         vout_InitPicture( VLC_OBJECT(p_stream), &pic,
1352                           id->p_encoder->fmt_in.i_codec,
1353                           id->f_dst.video.i_width, id->f_dst.video.i_height,
1354                           id->f_dst.video.i_width * VOUT_ASPECT_FACTOR /
1355                           id->f_dst.video.i_height );
1356
1357         for( i_plane = 0; i_plane < pic.i_planes; i_plane++ )
1358         {
1359             pic.p[i_plane].p_pixels = frame->data[i_plane];
1360             pic.p[i_plane].i_pitch = frame->linesize[i_plane];
1361         }
1362
1363         /* Set the pts of the frame being encoded */
1364         pic.date = p_sys->i_output_pts;
1365
1366         /* Interpolate the next PTS
1367          * (needed by the mpeg video packetizer which can send pts <= 0 ) */
1368         if( id->ff_dec_c && id->ff_dec_c->frame_rate > 0 )
1369         {
1370             p_sys->i_output_pts += I64C(1000000) * (2 + frame->repeat_pict) *
1371               id->ff_dec_c->frame_rate_base / (2 * id->ff_dec_c->frame_rate);
1372         }
1373
1374         p_block = id->p_encoder->pf_encode_video( id->p_encoder, &pic );
1375         while( p_block )
1376         {
1377             sout_buffer_t *p_out;
1378             block_t *p_prev_block = p_block;
1379
1380             p_out = sout_BufferNew( p_stream->p_sout, p_block->i_buffer );
1381             memcpy( p_out->p_buffer, p_block->p_buffer, p_block->i_buffer);
1382             p_out->i_dts = p_block->i_dts;
1383             p_out->i_pts = p_block->i_pts;
1384             p_out->i_length = p_block->i_length;
1385             sout_BufferChain( out, p_out );
1386
1387             p_block = p_block->p_next;
1388             block_Release( p_prev_block );
1389         }
1390
1391         if( i_data <= 0 )
1392         {
1393             return VLC_SUCCESS;
1394         }
1395     }
1396
1397     return VLC_SUCCESS;
1398 }
1399
1400 /*****************************************************************************
1401  * transcode_video_ffmpeg_getframebuf:
1402  *
1403  * Callback used by ffmpeg to get a frame buffer.
1404  * We use it to get the right PTS for each decoded picture.
1405  *****************************************************************************/
1406 static int transcode_video_ffmpeg_getframebuf(struct AVCodecContext *p_context,
1407                                               AVFrame *p_frame)
1408 {
1409     sout_stream_sys_t *p_sys = (sout_stream_sys_t *)p_context->opaque;
1410
1411     /* Set PTS */
1412     p_frame->pts = p_sys->i_input_pts;
1413
1414     return avcodec_default_get_buffer( p_context, p_frame );
1415 }