git.sesse.net Git - vlc/blob - modules/access_output/udp.c

   1 /*****************************************************************************
   2  * udp.c
   3  *****************************************************************************
   4  * Copyright (C) 2001-2005 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *          Eric Petit <titer@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 <sys/types.h>
  30 #include <sys/stat.h>
  31 #include <string.h>
  32 #include <errno.h>
  33 #include <fcntl.h>
  34
  35 #include <vlc/vlc.h>
  36 #include <vlc/sout.h>
  37
  38 #ifdef HAVE_UNISTD_H
  39 #   include <unistd.h>
  40 #endif
  41
  42 #ifdef WIN32
  43 #   include <winsock2.h>
  44 #   include <ws2tcpip.h>
  45 #   ifndef IN_MULTICAST
  46 #       define IN_MULTICAST(a) IN_CLASSD(a)
  47 #   endif
  48 #else
  49 #   include <sys/socket.h>
  50 #endif
  51
  52 #include "network.h"
  53
  54 #define MAX_EMPTY_BLOCKS 200
  55
  56 #if defined(WIN32) || defined(UNDER_CE)
  57 # define WINSOCK_STRERROR_SIZE 20
  58 static const char *winsock_strerror( char *buf )
  59 {
  60     snprintf( buf, WINSOCK_STRERROR_SIZE, "Winsock error %d",
  61               WSAGetLastError( ) );
  62     buf[WINSOCK_STRERROR_SIZE - 1] = '\0';
  63     return buf;
  64 }
  65 #endif
  66
  67 /*****************************************************************************
  68  * Module descriptor
  69  *****************************************************************************/
  70 static int  Open ( vlc_object_t * );
  71 static void Close( vlc_object_t * );
  72
  73 #define SOUT_CFG_PREFIX "sout-udp-"
  74
  75 #define CACHING_TEXT N_("Caching value (ms)")
  76 #define CACHING_LONGTEXT N_( \
  77     "Allows you to modify the default caching value for UDP streams. This " \
  78     "value should be set in millisecond units." )
  79
  80 #define TTL_TEXT N_("Time-To-Live")
  81 #define TTL_LONGTEXT N_("Allows you to define the time to live of the " \
  82                         "outgoing stream.")
  83
  84 #define GROUP_TEXT N_("Group packets")
  85 #define GROUP_LONGTEXT N_("Packets can be sent one by one at the right time " \
  86                           "or by groups. This allows you to give the number " \
  87                           "of packets that will be sent at a time. It " \
  88                           "helps reducing the scheduling load on " \
  89                           "heavily-loaded systems." )
  90 #define RAW_TEXT N_("Raw write")
  91 #define RAW_LONGTEXT N_("If you enable this option, packets will be sent " \
  92                        "directly, without trying to fill the MTU (ie, " \
  93                        "without trying to make the biggest possible packets " \
  94                        "in order to improve streaming)." )
  95
  96 vlc_module_begin();
  97     set_description( _("UDP stream output") );
  98     set_shortname( N_( "UDP" ) );
  99     set_category( CAT_SOUT );
 100     set_subcategory( SUBCAT_SOUT_ACO );
 101     add_integer( SOUT_CFG_PREFIX "caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
 102     add_integer( SOUT_CFG_PREFIX "ttl", 0, NULL,TTL_TEXT, TTL_LONGTEXT,
 103                                  VLC_TRUE );
 104     add_integer( SOUT_CFG_PREFIX "group", 1, NULL, GROUP_TEXT, GROUP_LONGTEXT,
 105                                  VLC_TRUE );
 106     add_suppressed_integer( SOUT_CFG_PREFIX "late" );
 107     add_bool( SOUT_CFG_PREFIX "raw",  0, NULL, RAW_TEXT, RAW_LONGTEXT,
 108                                  VLC_TRUE );
 109
 110     set_capability( "sout access", 100 );
 111     add_shortcut( "udp" );
 112     add_shortcut( "rtp" ); // Will work only with ts muxer
 113     set_callbacks( Open, Close );
 114 vlc_module_end();
 115
 116 /*****************************************************************************
 117  * Exported prototypes
 118  *****************************************************************************/
 119
 120 static const char *ppsz_sout_options[] = {
 121     "caching",
 122     "ttl",
 123     "group",
 124     "raw",
 125     NULL
 126 };
 127
 128 static int  Write   ( sout_access_out_t *, block_t * );
 129 static int  WriteRaw( sout_access_out_t *, block_t * );
 130 static int  Seek    ( sout_access_out_t *, off_t  );
 131
 132 static void ThreadWrite( vlc_object_t * );
 133 static block_t *NewUDPPacket( sout_access_out_t *, mtime_t );
 134
 135 typedef struct sout_access_thread_t
 136 {
 137     VLC_COMMON_MEMBERS
 138
 139     sout_instance_t *p_sout;
 140
 141     block_fifo_t *p_fifo;
 142
 143     int         i_handle;
 144
 145     int64_t     i_caching;
 146     int         i_group;
 147
 148     vlc_mutex_t blocks_lock;
 149     block_t     *p_empty_blocks;
 150     int         i_empty_depth;
 151
 152 } sout_access_thread_t;
 153
 154 struct sout_access_out_sys_t
 155 {
 156     int                 b_rtpts;  // 1 if add rtp/ts header
 157     uint16_t            i_sequence_number;
 158     uint32_t            i_ssrc;
 159
 160     int                 i_mtu;
 161
 162     block_t             *p_buffer;
 163
 164     sout_access_thread_t *p_thread;
 165
 166     vlc_bool_t          b_mtu_warning;
 167 };
 168
 169 #define DEFAULT_PORT 1234
 170
 171 /*****************************************************************************
 172  * Open: open the file
 173  *****************************************************************************/
 174 static int Open( vlc_object_t *p_this )
 175 {
 176     sout_access_out_t       *p_access = (sout_access_out_t*)p_this;
 177     sout_access_out_sys_t   *p_sys;
 178
 179     char                *psz_parser;
 180     char                *psz_dst_addr;
 181     int                 i_dst_port;
 182
 183     int                 i_handle;
 184
 185     vlc_value_t         val;
 186
 187     sout_CfgParse( p_access, SOUT_CFG_PREFIX,
 188                    ppsz_sout_options, p_access->p_cfg );
 189
 190     if( !( p_sys = malloc( sizeof( sout_access_out_sys_t ) ) ) )
 191     {
 192         msg_Err( p_access, "not enough memory" );
 193         return VLC_EGENERIC;
 194     }
 195     memset( p_sys, 0, sizeof(sout_access_out_sys_t) );
 196     p_access->p_sys = p_sys;
 197
 198     if( p_access->psz_access != NULL &&
 199         !strcmp( p_access->psz_access, "rtp" ) )
 200     {
 201         p_sys->b_rtpts = 1;
 202     }
 203     else
 204     {
 205         p_sys->b_rtpts = 0;
 206     }
 207
 208     psz_parser = strdup( p_access->psz_name );
 209
 210     psz_dst_addr = psz_parser;
 211     i_dst_port = 0;
 212
 213     if ( *psz_parser == '[' )
 214     {
 215         while( *psz_parser && *psz_parser != ']' )
 216         {
 217             psz_parser++;
 218         }
 219     }
 220     while( *psz_parser && *psz_parser != ':' )
 221     {
 222         psz_parser++;
 223     }
 224     if( *psz_parser == ':' )
 225     {
 226         *psz_parser = '\0';
 227         psz_parser++;
 228         i_dst_port = atoi( psz_parser );
 229     }
 230     if( i_dst_port <= 0 )
 231     {
 232         i_dst_port = DEFAULT_PORT;
 233     }
 234
 235     p_sys->p_thread =
 236         vlc_object_create( p_access, sizeof( sout_access_thread_t ) );
 237     if( !p_sys->p_thread )
 238     {
 239         msg_Err( p_access, "out of memory" );
 240         return VLC_EGENERIC;
 241     }
 242
 243     p_sys->p_thread->p_sout = p_access->p_sout;
 244     p_sys->p_thread->b_die  = 0;
 245     p_sys->p_thread->b_error= 0;
 246     p_sys->p_thread->p_fifo = block_FifoNew( p_access );
 247     p_sys->p_thread->p_empty_blocks = NULL;
 248     p_sys->p_thread->i_empty_depth = 0;
 249     vlc_mutex_init( p_access, &p_sys->p_thread->blocks_lock );
 250
 251     var_Get( p_access, SOUT_CFG_PREFIX "ttl", &val );
 252     i_handle = net_ConnectUDP( p_this, psz_dst_addr, i_dst_port, val.i_int );
 253     if( i_handle == -1 )
 254     {
 255          msg_Err( p_access, "failed to open a connection (udp)" );
 256          return VLC_EGENERIC;
 257     }
 258
 259     p_sys->p_thread->i_handle = i_handle;
 260     net_StopRecv( i_handle );
 261
 262     var_Get( p_access, SOUT_CFG_PREFIX "caching", &val );
 263     p_sys->p_thread->i_caching = (int64_t)val.i_int * 1000;
 264
 265     var_Get( p_access, SOUT_CFG_PREFIX "group", &val );
 266     p_sys->p_thread->i_group = val.i_int;
 267
 268     p_sys->i_mtu = var_CreateGetInteger( p_this, "mtu" );
 269
 270     if( vlc_thread_create( p_sys->p_thread, "sout write thread", ThreadWrite,
 271                            VLC_THREAD_PRIORITY_HIGHEST, VLC_FALSE ) )
 272     {
 273         msg_Err( p_access->p_sout, "cannot spawn sout access thread" );
 274         vlc_object_destroy( p_sys->p_thread );
 275         return VLC_EGENERIC;
 276     }
 277
 278     srand( (uint32_t)mdate());
 279     p_sys->p_buffer          = NULL;
 280     p_sys->i_sequence_number = rand()&0xffff;
 281     p_sys->i_ssrc            = rand()&0xffffffff;
 282
 283     var_Get( p_access, SOUT_CFG_PREFIX "raw", &val );
 284     if( val.b_bool )  p_access->pf_write = WriteRaw;
 285     else p_access->pf_write = Write;
 286
 287     p_access->pf_seek = Seek;
 288
 289     msg_Dbg( p_access, "udp access output opened(%s:%d)",
 290              psz_dst_addr, i_dst_port );
 291
 292     free( psz_dst_addr );
 293
 294     /* update p_sout->i_out_pace_nocontrol */
 295     p_access->p_sout->i_out_pace_nocontrol++;
 296
 297     return VLC_SUCCESS;
 298 }
 299
 300 /*****************************************************************************
 301  * Close: close the target
 302  *****************************************************************************/
 303 static void Close( vlc_object_t * p_this )
 304 {
 305     sout_access_out_t     *p_access = (sout_access_out_t*)p_this;
 306     sout_access_out_sys_t *p_sys = p_access->p_sys;
 307     int i;
 308
 309     p_sys->p_thread->b_die = 1;
 310     for( i = 0; i < 10; i++ )
 311     {
 312         block_t *p_dummy = block_New( p_access, p_sys->i_mtu );
 313         p_dummy->i_dts = 0;
 314         p_dummy->i_pts = 0;
 315         p_dummy->i_length = 0;
 316         memset( p_dummy->p_buffer, 0, p_dummy->i_buffer );
 317         block_FifoPut( p_sys->p_thread->p_fifo, p_dummy );
 318     }
 319     vlc_thread_join( p_sys->p_thread );
 320
 321     block_FifoRelease( p_sys->p_thread->p_fifo );
 322
 323     if( p_sys->p_buffer ) block_Release( p_sys->p_buffer );
 324     while ( p_sys->p_thread->p_empty_blocks != NULL )
 325     {
 326         block_t *p_next = p_sys->p_thread->p_empty_blocks->p_next;
 327         block_Release( p_sys->p_thread->p_empty_blocks );
 328         p_sys->p_thread->p_empty_blocks = p_next;
 329     }
 330     vlc_mutex_destroy( &p_sys->p_thread->blocks_lock );
 331
 332     net_Close( p_sys->p_thread->i_handle );
 333
 334     /* update p_sout->i_out_pace_nocontrol */
 335     p_access->p_sout->i_out_pace_nocontrol--;
 336
 337     msg_Dbg( p_access, "udp access output closed" );
 338     free( p_sys );
 339 }
 340
 341 /*****************************************************************************
 342  * Write: standard write on a file descriptor.
 343  *****************************************************************************/
 344 static int Write( sout_access_out_t *p_access, block_t *p_buffer )
 345 {
 346     sout_access_out_sys_t *p_sys = p_access->p_sys;
 347
 348     while( p_buffer )
 349     {
 350         block_t *p_next;
 351         int i_packets = 0;
 352
 353         if( !p_sys->b_mtu_warning && p_buffer->i_buffer > p_sys->i_mtu )
 354         {
 355             msg_Warn( p_access, "packet size > MTU, you should probably "
 356                       "increase the MTU" );
 357             p_sys->b_mtu_warning = VLC_TRUE;
 358         }
 359
 360         /* Check if there is enough space in the buffer */
 361         if( p_sys->p_buffer &&
 362             p_sys->p_buffer->i_buffer + p_buffer->i_buffer > p_sys->i_mtu )
 363         {
 364             if( p_sys->p_buffer->i_dts + p_sys->p_thread->i_caching < mdate() )
 365             {
 366                 msg_Dbg( p_access, "late packet for udp input (" I64Fd ")",
 367                          mdate() - p_sys->p_buffer->i_dts
 368                           - p_sys->p_thread->i_caching );
 369             }
 370             block_FifoPut( p_sys->p_thread->p_fifo, p_sys->p_buffer );
 371             p_sys->p_buffer = NULL;
 372         }
 373
 374         while( p_buffer->i_buffer )
 375         {
 376             int i_write = __MIN( p_buffer->i_buffer, p_sys->i_mtu );
 377
 378             i_packets++;
 379
 380             if( !p_sys->p_buffer )
 381             {
 382                 p_sys->p_buffer = NewUDPPacket( p_access, p_buffer->i_dts );
 383                 if( !p_sys->p_buffer ) break;
 384             }
 385
 386             memcpy( p_sys->p_buffer->p_buffer + p_sys->p_buffer->i_buffer,
 387                     p_buffer->p_buffer, i_write );
 388
 389             p_sys->p_buffer->i_buffer += i_write;
 390             p_buffer->p_buffer += i_write;
 391             p_buffer->i_buffer -= i_write;
 392             if ( p_buffer->i_flags & BLOCK_FLAG_CLOCK )
 393             {
 394                 if ( p_sys->p_buffer->i_flags & BLOCK_FLAG_CLOCK )
 395                     msg_Warn( p_access, "putting two PCRs at once" );
 396                 p_sys->p_buffer->i_flags |= BLOCK_FLAG_CLOCK;
 397             }
 398
 399             if( p_sys->p_buffer->i_buffer == p_sys->i_mtu || i_packets > 1 )
 400             {
 401                 /* Flush */
 402                 if( p_sys->p_buffer->i_dts + p_sys->p_thread->i_caching
 403                       < mdate() )
 404                 {
 405                     msg_Dbg( p_access, "late packet for udp input (" I64Fd ")",
 406                              mdate() - p_sys->p_buffer->i_dts
 407                               - p_sys->p_thread->i_caching );
 408                 }
 409                 block_FifoPut( p_sys->p_thread->p_fifo, p_sys->p_buffer );
 410                 p_sys->p_buffer = NULL;
 411             }
 412         }
 413
 414         p_next = p_buffer->p_next;
 415         block_Release( p_buffer );
 416         p_buffer = p_next;
 417     }
 418
 419     return( p_sys->p_thread->b_error ? -1 : 0 );
 420 }
 421
 422 /*****************************************************************************
 423  * WriteRaw: write p_buffer without trying to fill mtu
 424  *****************************************************************************/
 425 static int WriteRaw( sout_access_out_t *p_access, block_t *p_buffer )
 426 {
 427     sout_access_out_sys_t   *p_sys = p_access->p_sys;
 428     block_t *p_buf;
 429
 430     vlc_mutex_lock( &p_sys->p_thread->blocks_lock );
 431     while ( p_sys->p_thread->i_empty_depth >= MAX_EMPTY_BLOCKS )
 432     {
 433         p_buf = p_sys->p_thread->p_empty_blocks;
 434         p_sys->p_thread->p_empty_blocks =
 435                     p_sys->p_thread->p_empty_blocks->p_next;
 436         p_sys->p_thread->i_empty_depth--;
 437         vlc_mutex_unlock( &p_sys->p_thread->blocks_lock );
 438         block_Release( p_buf );
 439         vlc_mutex_lock( &p_sys->p_thread->blocks_lock );
 440     }
 441     vlc_mutex_unlock( &p_sys->p_thread->blocks_lock );
 442
 443     block_FifoPut( p_sys->p_thread->p_fifo, p_buffer );
 444
 445     return( p_sys->p_thread->b_error ? -1 : 0 );
 446 }
 447
 448 /*****************************************************************************
 449  * Seek: seek to a specific location in a file
 450  *****************************************************************************/
 451 static int Seek( sout_access_out_t *p_access, off_t i_pos )
 452 {
 453     msg_Err( p_access, "UDP sout access cannot seek" );
 454     return -1;
 455 }
 456
 457 /*****************************************************************************
 458  * NewUDPPacket: allocate a new UDP packet of size p_sys->i_mtu
 459  *****************************************************************************/
 460 static block_t *NewUDPPacket( sout_access_out_t *p_access, mtime_t i_dts)
 461 {
 462     sout_access_out_sys_t *p_sys = p_access->p_sys;
 463     block_t *p_buffer;
 464
 465     vlc_mutex_lock( &p_sys->p_thread->blocks_lock );
 466     while ( p_sys->p_thread->i_empty_depth > MAX_EMPTY_BLOCKS )
 467     {
 468         p_buffer = p_sys->p_thread->p_empty_blocks;
 469         p_sys->p_thread->p_empty_blocks =
 470                     p_sys->p_thread->p_empty_blocks->p_next;
 471         p_sys->p_thread->i_empty_depth--;
 472         vlc_mutex_unlock( &p_sys->p_thread->blocks_lock );
 473         block_Release( p_buffer );
 474         vlc_mutex_lock( &p_sys->p_thread->blocks_lock );
 475     }
 476     p_buffer = p_sys->p_thread->p_empty_blocks;
 477     if ( p_buffer != NULL )
 478     {
 479         p_sys->p_thread->p_empty_blocks =
 480                     p_sys->p_thread->p_empty_blocks->p_next;
 481         p_sys->p_thread->i_empty_depth--;
 482         vlc_mutex_unlock( &p_sys->p_thread->blocks_lock );
 483         p_buffer->p_next = NULL;
 484         p_buffer->i_flags = 0;
 485         p_buffer = block_Realloc( p_buffer, 0, p_sys->i_mtu );
 486     }
 487     else
 488     {
 489         vlc_mutex_unlock( &p_sys->p_thread->blocks_lock );
 490         p_buffer = block_New( p_access->p_sout, p_sys->i_mtu );
 491     }
 492
 493     p_buffer->i_dts = i_dts;
 494     p_buffer->i_buffer = 0;
 495
 496     if( p_sys->b_rtpts )
 497     {
 498         mtime_t i_timestamp = p_buffer->i_dts * 9 / 100;
 499
 500         /* add rtp/ts header */
 501         p_buffer->p_buffer[0] = 0x80;
 502         p_buffer->p_buffer[1] = 0x21; // mpeg2-ts
 503
 504         p_buffer->p_buffer[2] = ( p_sys->i_sequence_number >> 8 )&0xff;
 505         p_buffer->p_buffer[3] = p_sys->i_sequence_number&0xff;
 506         p_sys->i_sequence_number++;
 507
 508         p_buffer->p_buffer[4] = ( i_timestamp >> 24 )&0xff;
 509         p_buffer->p_buffer[5] = ( i_timestamp >> 16 )&0xff;
 510         p_buffer->p_buffer[6] = ( i_timestamp >>  8 )&0xff;
 511         p_buffer->p_buffer[7] = i_timestamp&0xff;
 512
 513         p_buffer->p_buffer[ 8] = ( p_sys->i_ssrc >> 24 )&0xff;
 514         p_buffer->p_buffer[ 9] = ( p_sys->i_ssrc >> 16 )&0xff;
 515         p_buffer->p_buffer[10] = ( p_sys->i_ssrc >>  8 )&0xff;
 516         p_buffer->p_buffer[11] = p_sys->i_ssrc&0xff;
 517
 518         p_buffer->i_buffer = 12;
 519     }
 520
 521     return p_buffer;
 522 }
 523
 524 /*****************************************************************************
 525  * ThreadWrite: Write a packet on the network at the good time.
 526  *****************************************************************************/
 527 static void ThreadWrite( vlc_object_t *p_this )
 528 {
 529     sout_access_thread_t *p_thread = (sout_access_thread_t*)p_this;
 530     mtime_t              i_date_last = -1;
 531     mtime_t              i_to_send = p_thread->i_group;
 532     int                  i_dropped_packets = 0;
 533 #if defined(WIN32) || defined(UNDER_CE)
 534     char strerror_buf[WINSOCK_STRERROR_SIZE];
 535 # define strerror( x ) winsock_strerror( strerror_buf )
 536 #endif
 537
 538     while( !p_thread->b_die )
 539     {
 540         block_t *p_pk;
 541         mtime_t       i_date, i_sent;
 542
 543         p_pk = block_FifoGet( p_thread->p_fifo );
 544
 545         i_date = p_thread->i_caching + p_pk->i_dts;
 546         if( i_date_last > 0 )
 547         {
 548             if( i_date - i_date_last > 2000000 )
 549             {
 550                 if( !i_dropped_packets )
 551                     msg_Dbg( p_thread, "mmh, hole ("I64Fd" > 2s) -> drop",
 552                              i_date - i_date_last );
 553
 554                 vlc_mutex_lock( &p_thread->blocks_lock );
 555                 p_pk->p_next = p_thread->p_empty_blocks;
 556                 p_thread->p_empty_blocks = p_pk;
 557                 p_thread->i_empty_depth++;
 558                 vlc_mutex_unlock( &p_thread->blocks_lock );
 559
 560                 i_date_last = i_date;
 561                 i_dropped_packets++;
 562                 continue;
 563             }
 564             else if( i_date - i_date_last < -1000 )
 565             {
 566                 if( !i_dropped_packets )
 567                     msg_Dbg( p_thread, "mmh, packets in the past ("I64Fd")",
 568                              i_date_last - i_date );
 569             }
 570         }
 571
 572         i_to_send--;
 573         if( !i_to_send || (p_pk->i_flags & BLOCK_FLAG_CLOCK) )
 574         {
 575             mwait( i_date );
 576             i_to_send = p_thread->i_group;
 577         }
 578         if( send( p_thread->i_handle, p_pk->p_buffer, p_pk->i_buffer, 0 )
 579               == -1 )
 580         {
 581             msg_Warn( p_thread, "send error: %s", strerror(errno) );
 582         }
 583
 584         if( i_dropped_packets )
 585         {
 586             msg_Dbg( p_thread, "dropped %i packets", i_dropped_packets );
 587             i_dropped_packets = 0;
 588         }
 589
 590 #if 1
 591         i_sent = mdate();
 592         if ( i_sent > i_date + 20000 )
 593         {
 594             msg_Dbg( p_thread, "packet has been sent too late (" I64Fd ")",
 595                      i_sent - i_date );
 596         }
 597 #endif
 598
 599         vlc_mutex_lock( &p_thread->blocks_lock );
 600         p_pk->p_next = p_thread->p_empty_blocks;
 601         p_thread->p_empty_blocks = p_pk;
 602         p_thread->i_empty_depth++;
 603         vlc_mutex_unlock( &p_thread->blocks_lock );
 604
 605         i_date_last = i_date;
 606     }
 607 }