modules/stream_out/record.c

   1 /*****************************************************************************
   2  * record.c: record stream output module
   3  *****************************************************************************
   4  * Copyright (C) 2008-2009 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <limits.h>
  33
  34 #include <vlc_common.h>
  35 #include <vlc_plugin.h>
  36 #include <vlc_block.h>
  37 #include <vlc_sout.h>
  38 #include <vlc_fs.h>
  39 #include <assert.h>
  40
  41 /*****************************************************************************
  42  * Exported prototypes
  43  *****************************************************************************/
  44 static int      Open    ( vlc_object_t * );
  45 static void     Close   ( vlc_object_t * );
  46
  47 /*****************************************************************************
  48  * Module descriptor
  49  *****************************************************************************/
  50 #define DST_PREFIX_TEXT N_("Destination prefix")
  51 #define DST_PREFIX_LONGTEXT N_( \
  52     "Prefix of the destination file automatically generated" )
  53
  54 #define SOUT_CFG_PREFIX "sout-record-"
  55
  56 vlc_module_begin ()
  57     set_description( N_("Record stream output") )
  58     set_capability( "sout stream", 0 )
  59     add_shortcut( "record" )
  60     set_shortname( N_("Record") )
  61
  62     set_category( CAT_SOUT )
  63     set_subcategory( SUBCAT_SOUT_STREAM )
  64
  65     add_string( SOUT_CFG_PREFIX "dst-prefix", "", DST_PREFIX_TEXT,
  66                 DST_PREFIX_LONGTEXT, true )
  67
  68     set_callbacks( Open, Close )
  69 vlc_module_end ()
  70
  71 /* */
  72 static const char *const ppsz_sout_options[] = {
  73     "dst-prefix",
  74     NULL
  75 };
  76
  77 /* */
  78 static sout_stream_id_t *Add ( sout_stream_t *, es_format_t * );
  79 static int               Del ( sout_stream_t *, sout_stream_id_t * );
  80 static int               Send( sout_stream_t *, sout_stream_id_t *, block_t* );
  81
  82 /* */
  83 struct sout_stream_id_t
  84 {
  85     es_format_t fmt;
  86
  87     block_t *p_first;
  88     block_t **pp_last;
  89
  90     sout_stream_id_t *id;
  91
  92     bool b_wait_key;
  93     bool b_wait_start;
  94 };
  95
  96 struct sout_stream_sys_t
  97 {
  98     char *psz_prefix;
  99
 100     sout_stream_t *p_out;
 101
 102     mtime_t     i_date_start;
 103     size_t      i_size;
 104
 105     mtime_t     i_max_wait;
 106     size_t      i_max_size;
 107
 108     bool        b_drop;
 109
 110     int              i_id;
 111     sout_stream_id_t **id;
 112     mtime_t     i_dts_start;
 113 };
 114
 115 static void OutputStart( sout_stream_t *p_stream );
 116 static void OutputSend( sout_stream_t *p_stream, sout_stream_id_t *id, block_t * );
 117
 118 /*****************************************************************************
 119  * Open:
 120  *****************************************************************************/
 121 static int Open( vlc_object_t *p_this )
 122 {
 123     sout_stream_t *p_stream = (sout_stream_t*)p_this;
 124     sout_stream_sys_t *p_sys;
 125
 126     p_stream->pf_add    = Add;
 127     p_stream->pf_del    = Del;
 128     p_stream->pf_send   = Send;
 129
 130     p_stream->p_sys = p_sys = malloc( sizeof(*p_sys) );
 131     if( !p_sys )
 132         return VLC_ENOMEM;
 133
 134     config_ChainParse( p_stream, SOUT_CFG_PREFIX, ppsz_sout_options, p_stream->p_cfg );
 135
 136     p_sys->p_out = NULL;
 137     p_sys->psz_prefix = var_GetNonEmptyString( p_stream, SOUT_CFG_PREFIX "dst-prefix" );
 138     if( !p_sys->psz_prefix  )
 139     {
 140         p_sys->psz_prefix = strdup( "sout-record-" );
 141         if( !p_sys->psz_prefix )
 142         {
 143             free( p_sys );
 144             return VLC_ENOMEM;
 145         }
 146     }
 147
 148     p_sys->i_date_start = -1;
 149     p_sys->i_size = 0;
 150 #ifdef OPTIMIZE_MEMORY
 151     p_sys->i_max_wait = 5*CLOCK_FREQ; /* 5s */
 152     p_sys->i_max_size = 1*1024*1024; /* 1 MiB */
 153 #else
 154     p_sys->i_max_wait = 30*CLOCK_FREQ; /* 30s */
 155     p_sys->i_max_size = 20*1024*1024; /* 20 MiB */
 156 #endif
 157     p_sys->b_drop = false;
 158     p_sys->i_dts_start = 0;
 159     TAB_INIT( p_sys->i_id, p_sys->id );
 160
 161     return VLC_SUCCESS;
 162 }
 163
 164 /*****************************************************************************
 165  * Close:
 166  *****************************************************************************/
 167 static void Close( vlc_object_t * p_this )
 168 {
 169     sout_stream_t *p_stream = (sout_stream_t*)p_this;
 170     sout_stream_sys_t *p_sys = p_stream->p_sys;
 171
 172     if( p_sys->p_out )
 173         sout_StreamChainDelete( p_sys->p_out, p_sys->p_out );
 174
 175     TAB_CLEAN( p_sys->i_id, p_sys->id );
 176     free( p_sys->psz_prefix );
 177     free( p_sys );
 178 }
 179
 180 /*****************************************************************************
 181  *
 182  *****************************************************************************/
 183 static sout_stream_id_t *Add( sout_stream_t *p_stream, es_format_t *p_fmt )
 184 {
 185     sout_stream_sys_t *p_sys = p_stream->p_sys;
 186     sout_stream_id_t *id;
 187
 188     id = malloc( sizeof(*id) );
 189     if( !id )
 190         return NULL;
 191
 192     es_format_Copy( &id->fmt, p_fmt );
 193     id->p_first = NULL;
 194     id->pp_last = &id->p_first;
 195     id->id = NULL;
 196     id->b_wait_key = true;
 197     id->b_wait_start = true;
 198
 199     TAB_APPEND( p_sys->i_id, p_sys->id, id );
 200
 201     return id;
 202 }
 203
 204 static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
 205 {
 206     sout_stream_sys_t *p_sys = p_stream->p_sys;
 207
 208     if( !p_sys->p_out )
 209         OutputStart( p_stream );
 210
 211     if( id->p_first )
 212         block_ChainRelease( id->p_first );
 213
 214     assert( !id->id || p_sys->p_out );
 215     if( id->id )
 216         sout_StreamIdDel( p_sys->p_out, id->id );
 217
 218     es_format_Clean( &id->fmt );
 219
 220     TAB_REMOVE( p_sys->i_id, p_sys->id, id );
 221
 222     if( p_sys->i_id <= 0 )
 223     {
 224         if( !p_sys->p_out )
 225             p_sys->b_drop = false;
 226     }
 227
 228     free( id );
 229
 230     return VLC_SUCCESS;
 231 }
 232
 233 static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
 234                  block_t *p_buffer )
 235 {
 236     sout_stream_sys_t *p_sys = p_stream->p_sys;
 237
 238     if( p_sys->i_date_start < 0 )
 239         p_sys->i_date_start = mdate();
 240     if( !p_sys->p_out &&
 241         ( mdate() - p_sys->i_date_start > p_sys->i_max_wait ||
 242           p_sys->i_size > p_sys->i_max_size ) )
 243     {
 244         msg_Dbg( p_stream, "Starting recording, waited %ds and %dbyte",
 245                  (int)((mdate() - p_sys->i_date_start)/1000000), (int)p_sys->i_size );
 246         OutputStart( p_stream );
 247     }
 248
 249     OutputSend( p_stream, id, p_buffer );
 250
 251     return VLC_SUCCESS;
 252 }
 253
 254 /*****************************************************************************
 255  *
 256  *****************************************************************************/
 257 typedef struct
 258 {
 259     const char  *psz_muxer;
 260     const char  *psz_extension;
 261     int         i_es_max;
 262     vlc_fourcc_t codec[128];
 263 } muxer_properties_t;
 264
 265 #define M(muxer, ext, count, ... ) { .psz_muxer = muxer, .psz_extension = ext, .i_es_max = count, .codec = { __VA_ARGS__, 0 } }
 266 /* Table of native codec support,
 267  * Do not do non native and non standard association !
 268  * Muxer will be probe if no entry found */
 269 static const muxer_properties_t p_muxers[] = {
 270     M( "raw", "mp3", 1,         VLC_CODEC_MPGA ),
 271     M( "raw", "a52", 1,         VLC_CODEC_A52 ),
 272     M( "raw", "dts", 1,         VLC_CODEC_DTS ),
 273     M( "raw", "mpc", 1,         VLC_CODEC_MUSEPACK7, VLC_CODEC_MUSEPACK8 ),
 274     M( "raw", "ape", 1,         VLC_CODEC_APE ),
 275
 276     M( "wav", "wav", 1,         VLC_CODEC_U8,   VLC_CODEC_S16L,
 277                                 VLC_CODEC_S24L, VLC_CODEC_S32L, VLC_CODEC_FL32 ),
 278
 279     //M( "ffmpeg{mux=flac}", "flac", 1, VLC_CODEC_FLAC ), BROKEN
 280
 281     M( "ogg", "ogg", INT_MAX,   VLC_CODEC_VORBIS, VLC_CODEC_SPEEX,  VLC_CODEC_FLAC,
 282                                 VLC_CODEC_SUBT,   VLC_CODEC_THEORA, VLC_CODEC_DIRAC  ),
 283
 284     M( "asf", "asf", 127,       VLC_CODEC_WMA1, VLC_CODEC_WMA2, VLC_CODEC_WMAP, VLC_CODEC_WMAL, VLC_CODEC_WMAS,
 285                                 VLC_CODEC_WMV1, VLC_CODEC_WMV2, VLC_CODEC_WMV3, VLC_CODEC_VC1 ),
 286
 287     M( "mp4", "mp4", INT_MAX,   VLC_CODEC_MP4A, VLC_CODEC_H264, VLC_CODEC_MP4V,
 288                                 VLC_CODEC_SUBT ),
 289
 290     M( "ps", "mpg", 16/* FIXME*/,VLC_CODEC_MPGV,
 291                                 VLC_CODEC_MPGA, VLC_CODEC_DVD_LPCM, VLC_CODEC_A52,
 292                                 VLC_CODEC_DTS,
 293                                 VLC_CODEC_SPU ),
 294
 295     M( "ts", "ts", 8000,        VLC_CODEC_MPGV,
 296                                 VLC_CODEC_H264,
 297                                 VLC_CODEC_MPGA, VLC_CODEC_DVD_LPCM, VLC_CODEC_A52,
 298                                 VLC_CODEC_DTS,  VLC_CODEC_MP4A,
 299                                 VLC_CODEC_DVBS, VLC_CODEC_TELETEXT ),
 300
 301     M( NULL, NULL, 0, 0 )
 302 };
 303 #undef M
 304
 305 static int OutputNew( sout_stream_t *p_stream,
 306                       const char *psz_muxer, const char *psz_prefix, const char *psz_extension  )
 307 {
 308     sout_stream_sys_t *p_sys = p_stream->p_sys;
 309     char *psz_file = NULL;
 310     char *psz_output = NULL;
 311     int i_count;
 312
 313     if( asprintf( &psz_file, "%s%s%s",
 314                   psz_prefix, psz_extension ? "." : "", psz_extension ? psz_extension : "" ) < 0 )
 315     {
 316         psz_file = NULL;
 317         goto error;
 318     }
 319
 320     if( asprintf( &psz_output, "std{access=file,mux='%s',dst='%s'}",
 321                   psz_muxer, psz_file ) < 0 )
 322     {
 323         psz_output = NULL;
 324         goto error;
 325     }
 326
 327     /* Create the output */
 328     msg_Dbg( p_stream, "Using record output `%s'", psz_output );
 329
 330     p_sys->p_out = sout_StreamChainNew( p_stream->p_sout, psz_output, NULL, NULL );
 331
 332     if( !p_sys->p_out )
 333         goto error;
 334
 335     /* Add es */
 336     i_count = 0;
 337     for( int i = 0; i < p_sys->i_id; i++ )
 338     {
 339         sout_stream_id_t *id = p_sys->id[i];
 340
 341         id->id = sout_StreamIdAdd( p_sys->p_out, &id->fmt );
 342         if( id->id )
 343             i_count++;
 344     }
 345
 346     if( psz_file && psz_extension )
 347         var_SetString( p_stream->p_libvlc, "record-file", psz_file );
 348
 349     free( psz_file );
 350     free( psz_output );
 351
 352     return i_count;
 353
 354 error:
 355
 356     free( psz_file );
 357     free( psz_output );
 358     return -1;
 359
 360 }
 361
 362 static void OutputStart( sout_stream_t *p_stream )
 363 {
 364     sout_stream_sys_t *p_sys = p_stream->p_sys;
 365
 366     /* */
 367     if( p_sys->b_drop )
 368         return;
 369
 370     /* From now on drop packet that cannot be handled */
 371     p_sys->b_drop = true;
 372
 373     /* Detect streams to smart select muxer */
 374     const char *psz_muxer = NULL;
 375     const char *psz_extension = NULL;
 376
 377     /* Look for preferred muxer
 378      * TODO we could insert transcode in a few cases like
 379      * s16l <-> s16b
 380      */
 381     for( int i = 0; p_muxers[i].psz_muxer != NULL; i++ )
 382     {
 383         bool b_ok;
 384         if( p_sys->i_id > p_muxers[i].i_es_max )
 385             continue;
 386
 387         b_ok = true;
 388         for( int j = 0; j < p_sys->i_id; j++ )
 389         {
 390             es_format_t *p_fmt = &p_sys->id[j]->fmt;
 391
 392             b_ok = false;
 393             for( int k = 0; p_muxers[i].codec[k] != 0; k++ )
 394             {
 395                 if( p_fmt->i_codec == p_muxers[i].codec[k] )
 396                 {
 397                     b_ok = true;
 398                     break;
 399                 }
 400             }
 401             if( !b_ok )
 402                 break;
 403         }
 404         if( !b_ok )
 405             continue;
 406
 407         psz_muxer = p_muxers[i].psz_muxer;
 408         psz_extension = p_muxers[i].psz_extension;
 409         break;
 410     }
 411
 412     /* If failed, brute force our demuxers and select the one that
 413      * keeps most of our stream */
 414     if( !psz_muxer || !psz_extension )
 415     {
 416         static const char *ppsz_muxers[][2] = {
 417             { "avi", "avi" }, { "mp4", "mp4" }, { "ogg", "ogg" },
 418             { "asf", "asf" }, {  "ts",  "ts" }, {  "ps", "mpg" },
 419 #if 0
 420             // XXX ffmpeg sefault really easily if you try an unsupported codec
 421             // mov and avi at least segfault
 422             { "ffmpeg{mux=avi}", "avi" },
 423             { "ffmpeg{mux=mov}", "mov" },
 424             { "ffmpeg{mux=mp4}", "mp4" },
 425             { "ffmpeg{mux=nsv}", "nsv" },
 426             { "ffmpeg{mux=flv}", "flv" },
 427 #endif
 428             { NULL, NULL }
 429         };
 430         int i_best = 0;
 431         int i_best_es = 0;
 432
 433         msg_Warn( p_stream, "failed to find an adequate muxer, probing muxers" );
 434         for( int i = 0; ppsz_muxers[i][0] != NULL; i++ )
 435         {
 436             char *psz_file;
 437             int i_es;
 438
 439             psz_file = tempnam( NULL, "vlc" );
 440             if( !psz_file )
 441                 continue;
 442
 443             msg_Dbg( p_stream, "probing muxer %s", ppsz_muxers[i][0] );
 444             i_es = OutputNew( p_stream, ppsz_muxers[i][0], psz_file, NULL );
 445
 446             if( i_es < 0 )
 447             {
 448                 vlc_unlink( psz_file );
 449                 free( psz_file );
 450                 continue;
 451             }
 452
 453             /* */
 454             for( int i = 0; i < p_sys->i_id; i++ )
 455             {
 456                 sout_stream_id_t *id = p_sys->id[i];
 457
 458                 if( id->id )
 459                     sout_StreamIdDel( p_sys->p_out, id->id );
 460                 id->id = NULL;
 461             }
 462             if( p_sys->p_out )
 463                 sout_StreamChainDelete( p_sys->p_out, p_sys->p_out );
 464             p_sys->p_out = NULL;
 465
 466             if( i_es > i_best_es )
 467             {
 468                 i_best_es = i_es;
 469                 i_best = i;
 470
 471                 if( i_best_es >= p_sys->i_id )
 472                     break;
 473             }
 474             vlc_unlink( psz_file );
 475             free( psz_file );
 476         }
 477
 478         /* */
 479         psz_muxer = ppsz_muxers[i_best][0];
 480         psz_extension = ppsz_muxers[i_best][1];
 481         msg_Dbg( p_stream, "using muxer %s with extension %s (%d/%d streams accepted)",
 482                  psz_muxer, psz_extension, i_best_es, p_sys->i_id );
 483     }
 484
 485     /* Create the output */
 486     if( OutputNew( p_stream, psz_muxer, p_sys->psz_prefix, psz_extension ) < 0 )
 487     {
 488         msg_Err( p_stream, "failed to open output");
 489         return;
 490     }
 491
 492     /* Compute highest timestamp of first I over all streams */
 493     p_sys->i_dts_start = 0;
 494     for( int i = 0; i < p_sys->i_id; i++ )
 495     {
 496         sout_stream_id_t *id = p_sys->id[i];
 497         block_t *p_block;
 498
 499         if( !id->id || !id->p_first )
 500             continue;
 501
 502         mtime_t i_dts = id->p_first->i_dts;
 503         for( p_block = id->p_first; p_block != NULL; p_block = p_block->p_next )
 504         {
 505             if( p_block->i_flags & BLOCK_FLAG_TYPE_I )
 506             {
 507                 i_dts = p_block->i_dts;
 508                 break;
 509             }
 510         }
 511
 512         if( i_dts > p_sys->i_dts_start )
 513             p_sys->i_dts_start = i_dts;
 514     }
 515
 516     /* Send buffered data */
 517     for( int i = 0; i < p_sys->i_id; i++ )
 518     {
 519         sout_stream_id_t *id = p_sys->id[i];
 520
 521         if( !id->id )
 522             continue;
 523
 524         block_t *p_block = id->p_first;
 525         while( p_block )
 526         {
 527             block_t *p_next = p_block->p_next;
 528
 529             p_block->p_next = NULL;
 530
 531             OutputSend( p_stream, id, p_block );
 532
 533             p_block = p_next;
 534         }
 535
 536         id->p_first = NULL;
 537         id->pp_last = &id->p_first;
 538     }
 539 }
 540
 541 static void OutputSend( sout_stream_t *p_stream, sout_stream_id_t *id, block_t *p_block )
 542 {
 543     sout_stream_sys_t *p_sys = p_stream->p_sys;
 544
 545     if( id->id )
 546     {
 547         /* We wait until the first key frame (if needed) and
 548          * to be beyong i_dts_start (for stream without key frame) */
 549         if( id->b_wait_key )
 550         {
 551             if( p_block->i_flags & BLOCK_FLAG_TYPE_I )
 552             {
 553                 id->b_wait_key = false;
 554                 id->b_wait_start = false;
 555             }
 556
 557             if( ( p_block->i_flags & BLOCK_FLAG_TYPE_MASK ) == 0 )
 558                 id->b_wait_key = false;
 559         }
 560         if( id->b_wait_start )
 561         {
 562             if( p_block->i_dts >=p_sys->i_dts_start )
 563                 id->b_wait_start = false;
 564         }
 565         if( id->b_wait_key || id->b_wait_start )
 566             block_ChainRelease( p_block );
 567         else
 568             sout_StreamIdSend( p_sys->p_out, id->id, p_block );
 569     }
 570     else if( p_sys->b_drop )
 571     {
 572         block_ChainRelease( p_block );
 573     }
 574     else
 575     {
 576         size_t i_size;
 577
 578         block_ChainProperties( p_block, NULL, &i_size, NULL );
 579         p_sys->i_size += i_size;
 580         block_ChainLastAppend( &id->pp_last, p_block );
 581     }
 582 }
 583