git.sesse.net Git - vlc/blob - modules/misc/rtsp.c

   1 /*****************************************************************************
   2  * rtsp.c: rtsp VoD server module
   3  *****************************************************************************
   4  * Copyright (C) 2003-2006 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <vlc_common.h>
  34 #include <vlc_plugin.h>
  35 #include <vlc_input.h>
  36 #include <vlc_sout.h>
  37 #include <vlc_block.h>
  38
  39 #include <vlc_httpd.h>
  40 #include <vlc_vod.h>
  41 #include <vlc_url.h>
  42 #include <vlc_network.h>
  43 #include <vlc_charset.h>
  44 #include <vlc_strings.h>
  45 #include <vlc_rand.h>
  46
  47 #ifndef WIN32
  48 # include <locale.h>
  49 #endif
  50
  51 #ifdef HAVE_XLOCALE_H
  52 # include <xlocale.h>
  53 #endif
  54
  55 /*****************************************************************************
  56  * Module descriptor
  57  *****************************************************************************/
  58 static int  Open ( vlc_object_t * );
  59 static void Close( vlc_object_t * );
  60
  61 #define THROTTLE_TEXT N_( "Maximum number of connections" )
  62 #define THROTTLE_LONGTEXT N_( "This limits the maximum number of clients " \
  63     "that can connect to the RTSP VOD. 0 means no limit."  )
  64
  65 #define RAWMUX_TEXT N_( "MUX for RAW RTSP transport" )
  66
  67 #define SESSION_TIMEOUT_TEXT N_( "Sets the timeout option in the RTSP " \
  68     "session string" )
  69 #define SESSION_TIMEOUT_LONGTEXT N_( "Defines what timeout option to add " \
  70     "to the RTSP session ID string. Setting it to a negative number removes " \
  71     "the timeout option entirely. This is needed by some IPTV STBs (such as " \
  72     "those made by HansunTech) which get confused by it. The default is 5." )
  73
  74 vlc_module_begin ()
  75     set_shortname( N_("RTSP VoD" ) )
  76     set_description( N_("RTSP VoD server") )
  77     set_category( CAT_SOUT )
  78     set_subcategory( SUBCAT_SOUT_VOD )
  79     set_capability( "vod server", 1 )
  80     set_callbacks( Open, Close )
  81     add_shortcut( "rtsp" )
  82     add_string( "rtsp-raw-mux", "ts", RAWMUX_TEXT,
  83                 RAWMUX_TEXT, true )
  84     add_integer( "rtsp-throttle-users", 0, THROTTLE_TEXT,
  85                  THROTTLE_LONGTEXT, true )
  86     add_integer( "rtsp-session-timeout", 5, SESSION_TIMEOUT_TEXT,
  87                  SESSION_TIMEOUT_LONGTEXT, true )
  88 vlc_module_end ()
  89
  90 /*****************************************************************************
  91  * Exported prototypes
  92  *****************************************************************************/
  93
  94 typedef struct media_es_t media_es_t;
  95
  96 typedef struct
  97 {
  98     media_es_t *p_media_es;
  99     int i_port;
 100
 101 } rtsp_client_es_t;
 102
 103 typedef struct
 104 {
 105     char *psz_session;
 106
 107     bool b_playing; /* is it in "play" state */
 108     int i_port_raw;
 109
 110     int i_es;
 111     rtsp_client_es_t **es;
 112
 113 } rtsp_client_t;
 114
 115 struct media_es_t
 116 {
 117     /* VoD server */
 118     vod_t *p_vod;
 119
 120     /* RTSP server */
 121     httpd_url_t *p_rtsp_url;
 122
 123     vod_media_t *p_media;
 124
 125     es_format_t fmt;
 126     uint8_t     i_payload_type;
 127     const char  *psz_ptname;
 128     unsigned    i_clock_rate;
 129     unsigned    i_channels;
 130     char        *psz_fmtp;
 131
 132 };
 133
 134 struct vod_media_t
 135 {
 136     int id;
 137
 138     /* VoD server */
 139     vod_t *p_vod;
 140
 141     /* RTSP server */
 142     httpd_url_t  *p_rtsp_url;
 143     char         *psz_rtsp_control_v4;
 144     char         *psz_rtsp_control_v6;
 145     char         *psz_rtsp_path;
 146
 147     vlc_mutex_t lock;
 148
 149     /* ES list */
 150     int        i_es;
 151     media_es_t **es;
 152     const char *psz_mux;
 153     bool  b_raw;
 154
 155     /* RTSP client */
 156     int           i_rtsp;
 157     rtsp_client_t **rtsp;
 158
 159     /* Infos */
 160     mtime_t i_length;
 161 };
 162
 163 struct vod_sys_t
 164 {
 165     /* RTSP server */
 166     httpd_host_t *p_rtsp_host;
 167     char *psz_path;
 168     int i_throttle_users;
 169     int i_connections;
 170
 171     char *psz_raw_mux;
 172
 173     int i_session_timeout;
 174
 175     /* List of media */
 176     int i_media_id;
 177     int i_media;
 178     vod_media_t **media;
 179
 180     /* */
 181     vlc_thread_t thread;
 182     block_fifo_t *p_fifo_cmd;
 183 };
 184
 185 /* rtsp delayed command (to avoid deadlock between vlm/httpd) */
 186 typedef enum
 187 {
 188     RTSP_CMD_TYPE_NONE,  /* Exit requested */
 189
 190     RTSP_CMD_TYPE_PLAY,
 191     RTSP_CMD_TYPE_PAUSE,
 192     RTSP_CMD_TYPE_STOP,
 193     RTSP_CMD_TYPE_SEEK,
 194     RTSP_CMD_TYPE_REWIND,
 195     RTSP_CMD_TYPE_FORWARD,
 196
 197     RTSP_CMD_TYPE_ADD,
 198     RTSP_CMD_TYPE_DEL,
 199 } rtsp_cmd_type_t;
 200
 201 /* */
 202 typedef struct
 203 {
 204     int i_type;
 205     int i_media_id;
 206     vod_media_t *p_media;
 207     char *psz_session;
 208     char *psz_arg;
 209     int64_t i_arg;
 210     double f_arg;
 211 } rtsp_cmd_t;
 212
 213 static vod_media_t *MediaNew( vod_t *, const char *, input_item_t * );
 214 static void         MediaDel( vod_t *, vod_media_t * );
 215 static void         MediaAskDel ( vod_t *, vod_media_t * );
 216 static int          MediaAddES( vod_t *, vod_media_t *, es_format_t * );
 217 static void         MediaDelES( vod_t *, vod_media_t *, es_format_t * );
 218
 219 static void* CommandThread( void * );
 220 static void  CommandPush( vod_t *, rtsp_cmd_type_t, vod_media_t *,
 221                           const char *psz_session, int64_t i_arg,
 222                           double f_arg, const char *psz_arg );
 223
 224 static rtsp_client_t *RtspClientNew( vod_media_t *, char * );
 225 static rtsp_client_t *RtspClientGet( vod_media_t *, const char * );
 226 static void           RtspClientDel( vod_media_t *, rtsp_client_t * );
 227
 228 static int RtspCallback( httpd_callback_sys_t *, httpd_client_t *,
 229                          httpd_message_t *, const httpd_message_t * );
 230 static int RtspCallbackES( httpd_callback_sys_t *, httpd_client_t *,
 231                            httpd_message_t *, const httpd_message_t * );
 232
 233 static char *SDPGenerate( const vod_media_t *, httpd_client_t *cl );
 234
 235 static void sprintf_hexa( char *s, uint8_t *p_data, int i_data )
 236 {
 237     static const char hex[16] = "0123456789abcdef";
 238
 239     for( int i = 0; i < i_data; i++ )
 240     {
 241         s[2*i+0] = hex[(p_data[i]>>4)&0xf];
 242         s[2*i+1] = hex[(p_data[i]   )&0xf];
 243     }
 244     s[2*i_data] = '\0';
 245 }
 246
 247 /*****************************************************************************
 248  * Open: Starts the RTSP server module
 249  *****************************************************************************/
 250 static int Open( vlc_object_t *p_this )
 251 {
 252     vod_t *p_vod = (vod_t *)p_this;
 253     vod_sys_t *p_sys = NULL;
 254     char *psz_url = NULL;
 255     vlc_url_t url;
 256
 257     psz_url = var_InheritString( p_vod, "rtsp-host" );
 258     vlc_UrlParse( &url, psz_url, 0 );
 259     free( psz_url );
 260
 261     p_vod->p_sys = p_sys = malloc( sizeof( vod_sys_t ) );
 262     if( !p_sys ) goto error;
 263     p_sys->p_rtsp_host = 0;
 264
 265     p_sys->i_session_timeout = var_CreateGetInteger( p_this, "rtsp-session-timeout" );
 266
 267     p_sys->i_throttle_users = var_CreateGetInteger( p_this, "rtsp-throttle-users" );
 268     msg_Dbg( p_this, "allowing up to %d connections", p_sys->i_throttle_users );
 269     p_sys->i_connections = 0;
 270
 271     p_sys->psz_raw_mux = var_CreateGetString( p_this, "rtsp-raw-mux" );
 272
 273     p_sys->p_rtsp_host = vlc_rtsp_HostNew( VLC_OBJECT(p_vod) );
 274     if( !p_sys->p_rtsp_host )
 275     {
 276         msg_Err( p_vod, "cannot create RTSP server" );
 277         goto error;
 278     }
 279
 280     p_sys->psz_path = strdup( url.psz_path ? url.psz_path : "/" );
 281
 282     vlc_UrlClean( &url );
 283
 284     TAB_INIT( p_sys->i_media, p_sys->media );
 285     p_sys->i_media_id = 0;
 286
 287     p_vod->pf_media_new = MediaNew;
 288     p_vod->pf_media_del = MediaAskDel;
 289
 290     p_sys->p_fifo_cmd = block_FifoNew();
 291     if( vlc_clone( &p_sys->thread, CommandThread, p_vod, VLC_THREAD_PRIORITY_LOW ) )
 292     {
 293         msg_Err( p_vod, "cannot spawn rtsp vod thread" );
 294         block_FifoRelease( p_sys->p_fifo_cmd );
 295         free( p_sys->psz_path );
 296         goto error;
 297     }
 298
 299     return VLC_SUCCESS;
 300
 301 error:
 302     if( p_sys )
 303     {
 304         if( p_sys->p_rtsp_host ) httpd_HostDelete( p_sys->p_rtsp_host );
 305         free( p_sys->psz_raw_mux );
 306         free( p_sys );
 307     }
 308     vlc_UrlClean( &url );
 309
 310     return VLC_EGENERIC;
 311 }
 312
 313 /*****************************************************************************
 314  * Close:
 315  *****************************************************************************/
 316 static void Close( vlc_object_t * p_this )
 317 {
 318     vod_t *p_vod = (vod_t *)p_this;
 319     vod_sys_t *p_sys = p_vod->p_sys;
 320
 321     /* Stop command thread */
 322     CommandPush( p_vod, RTSP_CMD_TYPE_NONE, NULL, NULL, 0, 0.0, NULL );
 323     vlc_join( p_sys->thread, NULL );
 324
 325     while( block_FifoCount( p_sys->p_fifo_cmd ) > 0 )
 326     {
 327         rtsp_cmd_t cmd;
 328         block_t *p_block_cmd = block_FifoGet( p_sys->p_fifo_cmd );
 329         memcpy( &cmd, p_block_cmd->p_buffer, sizeof(cmd) );
 330         block_Release( p_block_cmd );
 331         if ( cmd.i_type == RTSP_CMD_TYPE_DEL )
 332             MediaDel(p_vod, cmd.p_media);
 333         free( cmd.psz_session );
 334         free( cmd.psz_arg );
 335     }
 336     block_FifoRelease( p_sys->p_fifo_cmd );
 337
 338     httpd_HostDelete( p_sys->p_rtsp_host );
 339     var_Destroy( p_this, "rtsp-session-timeout" );
 340     var_Destroy( p_this, "rtsp-throttle-users" );
 341     var_Destroy( p_this, "rtsp-raw-mux" );
 342
 343     /* Check VLM is not buggy */
 344     if( p_sys->i_media > 0 )
 345         msg_Err( p_vod, "rtsp vod leaking %d medias", p_sys->i_media );
 346     TAB_CLEAN( p_sys->i_media, p_sys->media );
 347
 348     free( p_sys->psz_path );
 349     free( p_sys->psz_raw_mux );
 350     free( p_sys );
 351 }
 352
 353 /*****************************************************************************
 354  * Media handling
 355  *****************************************************************************/
 356 static vod_media_t *MediaNew( vod_t *p_vod, const char *psz_name,
 357                               input_item_t *p_item )
 358 {
 359     vod_sys_t *p_sys = p_vod->p_sys;
 360
 361     vod_media_t *p_media = calloc( 1, sizeof(vod_media_t) );
 362     if( !p_media )
 363         return NULL;
 364
 365     p_media->id = p_sys->i_media_id++;
 366     TAB_INIT( p_media->i_es, p_media->es );
 367     p_media->psz_mux = NULL;
 368     TAB_INIT( p_media->i_rtsp, p_media->rtsp );
 369     p_media->b_raw = false;
 370
 371     if( asprintf( &p_media->psz_rtsp_path, "%s%s",
 372                   p_sys->psz_path, psz_name ) <0 )
 373         return NULL;
 374     p_media->p_rtsp_url =
 375         httpd_UrlNewUnique( p_sys->p_rtsp_host, p_media->psz_rtsp_path, NULL,
 376                             NULL, NULL );
 377
 378     if( !p_media->p_rtsp_url )
 379     {
 380         msg_Err( p_vod, "cannot create RTSP url (%s)", p_media->psz_rtsp_path);
 381         free( p_media->psz_rtsp_path );
 382         free( p_media );
 383         return NULL;
 384     }
 385
 386     msg_Dbg( p_vod, "created RTSP url: %s", p_media->psz_rtsp_path );
 387
 388     if( asprintf( &p_media->psz_rtsp_control_v4,
 389                   "rtsp://%%s:%%d%s/trackID=%%d",
 390                   p_media->psz_rtsp_path ) < 0 )
 391     {
 392         httpd_UrlDelete( p_media->p_rtsp_url );
 393         free( p_media->psz_rtsp_path );
 394         free( p_media );
 395         return NULL;
 396     }
 397     if( asprintf( &p_media->psz_rtsp_control_v6,
 398                   "rtsp://[%%s]:%%d%s/trackID=%%d",
 399                   p_media->psz_rtsp_path ) < 0 )
 400     {
 401         httpd_UrlDelete( p_media->p_rtsp_url );
 402         free( p_media->psz_rtsp_path );
 403         free( p_media );
 404         return NULL;
 405     }
 406
 407     httpd_UrlCatch( p_media->p_rtsp_url, HTTPD_MSG_SETUP,
 408                     RtspCallback, (void*)p_media );
 409     httpd_UrlCatch( p_media->p_rtsp_url, HTTPD_MSG_DESCRIBE,
 410                     RtspCallback, (void*)p_media );
 411     httpd_UrlCatch( p_media->p_rtsp_url, HTTPD_MSG_PLAY,
 412                     RtspCallback, (void*)p_media );
 413     httpd_UrlCatch( p_media->p_rtsp_url, HTTPD_MSG_PAUSE,
 414                     RtspCallback, (void*)p_media );
 415     httpd_UrlCatch( p_media->p_rtsp_url, HTTPD_MSG_GETPARAMETER,
 416                     RtspCallback, (void*)p_media );
 417     httpd_UrlCatch( p_media->p_rtsp_url, HTTPD_MSG_TEARDOWN,
 418                     RtspCallback, (void*)p_media );
 419
 420     p_media->p_vod = p_vod;
 421
 422     vlc_mutex_init( &p_media->lock );
 423
 424     p_media->i_length = input_item_GetDuration( p_item );
 425
 426     vlc_mutex_lock( &p_item->lock );
 427     msg_Dbg( p_vod, "media has %i declared ES", p_item->i_es );
 428     for( int i = 0; i < p_item->i_es; i++ )
 429     {
 430         MediaAddES( p_vod, p_media, p_item->es[i] );
 431     }
 432     vlc_mutex_unlock( &p_item->lock );
 433
 434     CommandPush( p_vod, RTSP_CMD_TYPE_ADD, p_media, NULL, 0, 0.0, NULL );
 435     return p_media;
 436 }
 437
 438 static void MediaAskDel ( vod_t *p_vod, vod_media_t *p_media )
 439 {
 440     CommandPush( p_vod, RTSP_CMD_TYPE_DEL, p_media, NULL, 0, 0.0, NULL );
 441 }
 442
 443 static void MediaDel( vod_t *p_vod, vod_media_t *p_media )
 444 {
 445     vod_sys_t *p_sys = p_vod->p_sys;
 446
 447     msg_Dbg( p_vod, "deleting media: %s", p_media->psz_rtsp_path );
 448
 449     TAB_REMOVE( p_sys->i_media, p_sys->media, p_media );
 450
 451     httpd_UrlDelete( p_media->p_rtsp_url );
 452
 453     while( p_media->i_rtsp > 0 )
 454         RtspClientDel( p_media, p_media->rtsp[0] );
 455     TAB_CLEAN( p_media->i_rtsp, p_media->rtsp );
 456
 457     free( p_media->psz_rtsp_path );
 458     free( p_media->psz_rtsp_control_v6 );
 459     free( p_media->psz_rtsp_control_v4 );
 460
 461     while( p_media->i_es )
 462         MediaDelES( p_vod, p_media, &p_media->es[0]->fmt );
 463     TAB_CLEAN( p_media->i_es, p_media->es );
 464
 465     vlc_mutex_destroy( &p_media->lock );
 466
 467     free( p_media );
 468 }
 469
 470 static int MediaAddES( vod_t *p_vod, vod_media_t *p_media, es_format_t *p_fmt )
 471 {
 472     char *psz_urlc;
 473
 474     media_es_t *p_es = calloc( 1, sizeof(media_es_t) );
 475     if( !p_es )
 476         return VLC_ENOMEM;
 477
 478     p_media->psz_mux = NULL;
 479
 480     /* TODO: update SDP, etc... */
 481     if( asprintf( &psz_urlc, "%s/trackID=%d",
 482               p_media->psz_rtsp_path, p_media->i_es ) < 0 )
 483     {
 484         free( p_es );
 485         return VLC_ENOMEM;
 486     }
 487     msg_Dbg( p_vod, "  - ES %4.4s (%s)", (char *)&p_fmt->i_codec, psz_urlc );
 488
 489     /* Dynamic payload. No conflict since we put each ES in its own
 490      * RTP session */
 491     p_es->i_payload_type = 96;
 492     p_es->i_clock_rate = 90000;
 493     p_es->i_channels = 1;
 494
 495     switch( p_fmt->i_codec )
 496     {
 497         case VLC_CODEC_S16B:
 498             if( p_fmt->audio.i_channels == 1 && p_fmt->audio.i_rate == 44100 )
 499             {
 500                 p_es->i_payload_type = 11;
 501             }
 502             else if( p_fmt->audio.i_channels == 2 &&
 503                      p_fmt->audio.i_rate == 44100 )
 504             {
 505                 p_es->i_payload_type = 10;
 506             }
 507             p_es->psz_ptname = "L16";
 508             p_es->i_clock_rate = p_fmt->audio.i_rate;
 509             p_es->i_channels = p_fmt->audio.i_channels;
 510             break;
 511         case VLC_CODEC_U8:
 512             p_es->psz_ptname = "L8";
 513             p_es->i_clock_rate = p_fmt->audio.i_rate;
 514             p_es->i_channels = p_fmt->audio.i_channels;
 515             break;
 516         case VLC_CODEC_MPGA:
 517             p_es->i_payload_type = 14;
 518             p_es->psz_ptname = "MPA";
 519             break;
 520         case VLC_CODEC_MPGV:
 521             p_es->i_payload_type = 32;
 522             p_es->psz_ptname = "MPV";
 523             break;
 524         case VLC_CODEC_A52:
 525             p_es->psz_ptname = "ac3";
 526             p_es->i_clock_rate = p_fmt->audio.i_rate;
 527             break;
 528         case VLC_CODEC_H263:
 529             p_es->psz_ptname = "H263-1998";
 530             break;
 531         case VLC_CODEC_H264:
 532             p_es->psz_ptname = "H264";
 533             p_es->psz_fmtp = NULL;
 534             /* FIXME AAAAAAAAAAAARRRRRRRRGGGG copied from stream_out/rtp.c */
 535             if( p_fmt->i_extra > 0 )
 536             {
 537                 uint8_t *p_buffer = p_fmt->p_extra;
 538                 int     i_buffer = p_fmt->i_extra;
 539                 char    *p_64_sps = NULL;
 540                 char    *p_64_pps = NULL;
 541                 char    hexa[6+1];
 542
 543                 while( i_buffer > 4 )
 544                 {
 545                     int i_offset    = 0;
 546                     int i_size      = 0;
 547
 548                     while( p_buffer[0] != 0 || p_buffer[1] != 0 ||
 549                            p_buffer[2] != 1 )
 550                     {
 551                         p_buffer++;
 552                         i_buffer--;
 553                         if( i_buffer == 0 ) break;
 554                     }
 555
 556                     if( i_buffer < 4 || memcmp(p_buffer, "\x00\x00\x01", 3 ) )
 557                     {
 558                         /* No startcode found.. */
 559                         break;
 560                     }
 561                     p_buffer += 3;
 562                     i_buffer -= 3;
 563
 564                     const int i_nal_type = p_buffer[0]&0x1f;
 565
 566                     i_size = i_buffer;
 567                     for( i_offset = 0; i_offset+2 < i_buffer ; i_offset++)
 568                     {
 569                         if( !memcmp(p_buffer + i_offset, "\x00\x00\x01", 3 ) )
 570                         {
 571                             /* we found another startcode */
 572                             while( i_offset > 0 && 0 == p_buffer[ i_offset - 1 ] )
 573                                 i_offset--;
 574                             i_size = i_offset;
 575                             break;
 576                         }
 577                     }
 578
 579                     if( i_size == 0 )
 580                     {
 581                         /* No-info found in nal */
 582                         continue;
 583                     }
 584
 585                     if( i_nal_type == 7 )
 586                     {
 587                         free( p_64_sps );
 588                         p_64_sps = vlc_b64_encode_binary( p_buffer, i_size );
 589                         /* XXX: nothing ensures that i_size >= 4 ?? */
 590                         sprintf_hexa( hexa, &p_buffer[1], 3 );
 591                     }
 592                     else if( i_nal_type == 8 )
 593                     {
 594                         free( p_64_pps );
 595                         p_64_pps = vlc_b64_encode_binary( p_buffer, i_size );
 596                     }
 597                     i_buffer -= i_size;
 598                     p_buffer += i_size;
 599                 }
 600                 /* */
 601                 if( p_64_sps && p_64_pps )
 602                 {
 603                     if( asprintf( &p_es->psz_fmtp,
 604                                   "packetization-mode=1;profile-level-id=%s;"
 605                                   "sprop-parameter-sets=%s,%s;", hexa, p_64_sps,
 606                                   p_64_pps ) < 0 )
 607                     {
 608                         free( p_64_sps );
 609                         free( p_64_pps );
 610                         free( psz_urlc );
 611                         free( p_es );
 612                         return VLC_ENOMEM;
 613                     }
 614                 }
 615                 free( p_64_sps );
 616                 free( p_64_pps );
 617             }
 618             if( !p_es->psz_fmtp )
 619                 p_es->psz_fmtp = strdup( "packetization-mode=1" );
 620             break;
 621         case VLC_CODEC_MP4V:
 622             p_es->psz_ptname = "MP4V-ES";
 623             if( p_fmt->i_extra > 0 )
 624             {
 625                 char *p_hexa = malloc( 2 * p_fmt->i_extra + 1 );
 626                 sprintf_hexa( p_hexa, p_fmt->p_extra, p_fmt->i_extra );
 627                 if( asprintf( &p_es->psz_fmtp,
 628                               "profile-level-id=3; config=%s;", p_hexa ) == -1 )
 629                     p_es->psz_fmtp = NULL;
 630                 free( p_hexa );
 631             }
 632             break;
 633         case VLC_CODEC_MP4A:
 634             p_es->psz_ptname = "mpeg4-generic";
 635             p_es->i_clock_rate = p_fmt->audio.i_rate;
 636             if( p_fmt->i_extra > 0 )
 637             {
 638                 char *p_hexa = malloc( 2 * p_fmt->i_extra + 1 );
 639                 sprintf_hexa( p_hexa, p_fmt->p_extra, p_fmt->i_extra );
 640                 if( asprintf( &p_es->psz_fmtp,
 641                               "streamtype=5; profile-level-id=15; mode=AAC-hbr; "
 642                               "config=%s; SizeLength=13;IndexLength=3; "
 643                               "IndexDeltaLength=3; Profile=1;", p_hexa ) == -1 )
 644                     p_es->psz_fmtp = NULL;
 645                 free( p_hexa );
 646             }
 647             break;
 648         case VLC_FOURCC( 'm', 'p', '2', 't' ):
 649             p_media->psz_mux = "ts";
 650             p_es->i_payload_type = 33;
 651             p_es->psz_ptname = "MP2T";
 652             break;
 653         case VLC_FOURCC( 'm', 'p', '2', 'p' ):
 654             p_media->psz_mux = "ps";
 655             p_es->psz_ptname = "MP2P";
 656             break;
 657         case VLC_CODEC_AMR_NB:
 658             p_es->psz_ptname = "AMR";
 659             p_es->i_clock_rate = 8000;
 660             if(p_fmt->audio.i_channels == 2 )
 661                 p_es->i_channels = 2;
 662             p_es->psz_fmtp = strdup( "octet-align=1" );
 663             break;
 664         case VLC_CODEC_AMR_WB:
 665             p_es->psz_ptname = "AMR-WB";
 666             p_es->i_clock_rate = 16000;
 667             if(p_fmt->audio.i_channels == 2 )
 668                 p_es->i_channels = 2;
 669             p_es->psz_fmtp = strdup( "octet-align=1" );
 670             break;
 671
 672         default:
 673             msg_Err( p_vod, "cannot add this stream (unsupported "
 674                     "codec: %4.4s)", (char*)&p_fmt->i_codec );
 675             free( psz_urlc );
 676             free( p_es );
 677             return VLC_EGENERIC;
 678     }
 679
 680     p_es->p_rtsp_url =
 681         httpd_UrlNewUnique( p_vod->p_sys->p_rtsp_host, psz_urlc, NULL, NULL,
 682                             NULL );
 683
 684     if( !p_es->p_rtsp_url )
 685     {
 686         msg_Err( p_vod, "cannot create RTSP url (%s)", psz_urlc );
 687         free( psz_urlc );
 688         free( p_es );
 689         return VLC_EGENERIC;
 690     }
 691     free( psz_urlc );
 692
 693     httpd_UrlCatch( p_es->p_rtsp_url, HTTPD_MSG_SETUP,
 694                     RtspCallbackES, (void*)p_es );
 695     httpd_UrlCatch( p_es->p_rtsp_url, HTTPD_MSG_TEARDOWN,
 696                     RtspCallbackES, (void*)p_es );
 697     httpd_UrlCatch( p_es->p_rtsp_url, HTTPD_MSG_PLAY,
 698                     RtspCallbackES, (void*)p_es );
 699     httpd_UrlCatch( p_es->p_rtsp_url, HTTPD_MSG_PAUSE,
 700                     RtspCallbackES, (void*)p_es );
 701
 702     es_format_Copy( &p_es->fmt, p_fmt );
 703     p_es->p_vod = p_vod;
 704     p_es->p_media = p_media;
 705
 706     vlc_mutex_lock( &p_media->lock );
 707     TAB_APPEND( p_media->i_es, p_media->es, p_es );
 708     vlc_mutex_unlock( &p_media->lock );
 709
 710     return VLC_SUCCESS;
 711 }
 712
 713 static void MediaDelES( vod_t *p_vod, vod_media_t *p_media, es_format_t *p_fmt)
 714 {
 715     media_es_t *p_es = NULL;
 716
 717     /* Find the ES */
 718     for( int i = 0; i < p_media->i_es; i++ )
 719     {
 720         if( p_media->es[i]->fmt.i_cat == p_fmt->i_cat &&
 721             p_media->es[i]->fmt.i_codec == p_fmt->i_codec &&
 722             p_media->es[i]->fmt.i_id == p_fmt->i_id )
 723         {
 724             p_es = p_media->es[i];
 725         }
 726     }
 727     if( !p_es ) return;
 728
 729     msg_Dbg( p_vod, "  - Removing ES %4.4s", (char *)&p_fmt->i_codec );
 730
 731     vlc_mutex_lock( &p_media->lock );
 732     TAB_REMOVE( p_media->i_es, p_media->es, p_es );
 733     vlc_mutex_unlock( &p_media->lock );
 734
 735     free( p_es->psz_fmtp );
 736
 737     if( p_es->p_rtsp_url ) httpd_UrlDelete( p_es->p_rtsp_url );
 738     es_format_Clean( &p_es->fmt );
 739     free( p_es );
 740 }
 741
 742 static void CommandPush( vod_t *p_vod, rtsp_cmd_type_t i_type, vod_media_t *p_media, const char *psz_session, int64_t i_arg,
 743                          double f_arg, const char *psz_arg )
 744 {
 745     rtsp_cmd_t cmd;
 746     block_t *p_cmd;
 747
 748     memset( &cmd, 0, sizeof(cmd) );
 749     cmd.i_type = i_type;
 750     cmd.p_media = p_media;
 751     if( p_media )
 752         cmd.i_media_id = p_media->id;
 753     if( psz_session )
 754         cmd.psz_session = strdup(psz_session);
 755     cmd.i_arg = i_arg;
 756     cmd.f_arg = f_arg;
 757     if( psz_arg )
 758         cmd.psz_arg = strdup(psz_arg);
 759
 760     p_cmd = block_New( p_vod, sizeof(rtsp_cmd_t) );
 761     memcpy( p_cmd->p_buffer, &cmd, sizeof(cmd) );
 762
 763     block_FifoPut( p_vod->p_sys->p_fifo_cmd, p_cmd );
 764 }
 765
 766 static void* CommandThread( void *obj )
 767 {
 768     vod_t *p_vod = (vod_t*)obj;
 769     vod_sys_t *p_sys = p_vod->p_sys;
 770     int canc = vlc_savecancel ();
 771
 772     for( ;; )
 773     {
 774         block_t *p_block_cmd = block_FifoGet( p_sys->p_fifo_cmd );
 775         rtsp_cmd_t cmd;
 776         vod_media_t *p_media = NULL;
 777         int i;
 778
 779         if( !p_block_cmd )
 780             break;
 781
 782         memcpy( &cmd, p_block_cmd->p_buffer, sizeof(cmd) );
 783         block_Release( p_block_cmd );
 784
 785         if( cmd.i_type == RTSP_CMD_TYPE_NONE )
 786             break;
 787
 788         if ( cmd.i_type == RTSP_CMD_TYPE_ADD )
 789         {
 790             TAB_APPEND( p_sys->i_media, p_sys->media, cmd.p_media );
 791             goto next;
 792         }
 793
 794         if ( cmd.i_type == RTSP_CMD_TYPE_DEL )
 795         {
 796             MediaDel(p_vod, cmd.p_media);
 797             goto next;
 798         }
 799
 800         /* */
 801         for( i = 0; i < p_sys->i_media; i++ )
 802         {
 803             if( p_sys->media[i]->id == cmd.i_media_id )
 804                 break;
 805         }
 806         if( i >= p_sys->i_media )
 807         {
 808             goto next;
 809         }
 810         p_media = p_sys->media[i];
 811
 812         switch( cmd.i_type )
 813         {
 814         case RTSP_CMD_TYPE_PLAY:
 815             cmd.i_arg = -1;
 816             vod_MediaControl( p_vod, p_media, cmd.psz_session,
 817                               VOD_MEDIA_PLAY, cmd.psz_arg, &cmd.i_arg );
 818             break;
 819         case RTSP_CMD_TYPE_PAUSE:
 820             cmd.i_arg = -1;
 821             vod_MediaControl( p_vod, p_media, cmd.psz_session,
 822                               VOD_MEDIA_PAUSE, &cmd.i_arg );
 823             break;
 824
 825         case RTSP_CMD_TYPE_STOP:
 826             vod_MediaControl( p_vod, p_media, cmd.psz_session, VOD_MEDIA_STOP );
 827             break;
 828
 829         case RTSP_CMD_TYPE_SEEK:
 830             vod_MediaControl( p_vod, p_media, cmd.psz_session,
 831                               VOD_MEDIA_SEEK, cmd.i_arg );
 832             break;
 833
 834         case RTSP_CMD_TYPE_REWIND:
 835             vod_MediaControl( p_vod, p_media, cmd.psz_session,
 836                               VOD_MEDIA_REWIND, cmd.f_arg );
 837             break;
 838
 839         case RTSP_CMD_TYPE_FORWARD:
 840             vod_MediaControl( p_vod, p_media, cmd.psz_session,
 841                               VOD_MEDIA_FORWARD, cmd.f_arg );
 842             break;
 843
 844         default:
 845             break;
 846         }
 847
 848     next:
 849         free( cmd.psz_session );
 850         free( cmd.psz_arg );
 851     }
 852
 853     vlc_restorecancel (canc);
 854     return NULL;
 855 }
 856
 857 /****************************************************************************
 858  * RTSP server implementation
 859  ****************************************************************************/
 860 static rtsp_client_t *RtspClientNew( vod_media_t *p_media, char *psz_session )
 861 {
 862     rtsp_client_t *p_rtsp = calloc( 1, sizeof(rtsp_client_t) );
 863
 864     if( !p_rtsp )
 865         return NULL;
 866     p_rtsp->es = 0;
 867
 868     p_rtsp->psz_session = psz_session;
 869     TAB_APPEND( p_media->i_rtsp, p_media->rtsp, p_rtsp );
 870
 871     p_media->p_vod->p_sys->i_connections++;
 872     msg_Dbg( p_media->p_vod, "new session: %s, connections: %d",
 873              psz_session, p_media->p_vod->p_sys->i_throttle_users );
 874
 875     return p_rtsp;
 876 }
 877
 878 static rtsp_client_t *RtspClientGet( vod_media_t *p_media, const char *psz_session )
 879 {
 880     for( int i = 0; psz_session && i < p_media->i_rtsp; i++ )
 881     {
 882         if( !strcmp( p_media->rtsp[i]->psz_session, psz_session ) )
 883             return p_media->rtsp[i];
 884     }
 885
 886     return NULL;
 887 }
 888
 889 static void RtspClientDel( vod_media_t *p_media, rtsp_client_t *p_rtsp )
 890 {
 891     p_media->p_vod->p_sys->i_connections--;
 892     msg_Dbg( p_media->p_vod, "closing session: %s, connections: %d",
 893              p_rtsp->psz_session, p_media->p_vod->p_sys->i_throttle_users );
 894
 895     while( p_rtsp->i_es )
 896     {
 897         p_rtsp->i_es--;
 898         free( p_rtsp->es[p_rtsp->i_es] );
 899     }
 900     free( p_rtsp->es );
 901
 902     TAB_REMOVE( p_media->i_rtsp, p_media->rtsp, p_rtsp );
 903
 904     free( p_rtsp->psz_session );
 905     free( p_rtsp );
 906 }
 907
 908
 909 static int64_t ParseNPT (const char *str)
 910 {
 911     locale_t loc = newlocale (LC_NUMERIC_MASK, "C", NULL);
 912     locale_t oldloc = uselocale (loc);
 913     unsigned hour, min;
 914     float sec;
 915
 916     if (sscanf (str, "%u:%u:%f", &hour, &min, &sec) == 3)
 917         sec += ((hour * 60) + min) * 60;
 918     else
 919     if (sscanf (str, "%f", &sec) != 1)
 920         sec = 0.;
 921
 922     if (loc != (locale_t)0)
 923     {
 924         uselocale (oldloc);
 925         freelocale (loc);
 926     }
 927     return sec * CLOCK_FREQ;
 928 }
 929
 930
 931 static int RtspCallback( httpd_callback_sys_t *p_args, httpd_client_t *cl,
 932                          httpd_message_t *answer, const httpd_message_t *query )
 933 {
 934     vod_media_t *p_media = (vod_media_t*)p_args;
 935     vod_t *p_vod = p_media->p_vod;
 936     const char *psz_transport = NULL;
 937     const char *psz_playnow = NULL; /* support option: x-playNow */
 938     const char *psz_session = NULL;
 939     const char *psz_cseq = NULL;
 940     rtsp_client_t *p_rtsp;
 941     int i_cseq = 0;
 942
 943     if( answer == NULL || query == NULL ) return VLC_SUCCESS;
 944
 945     msg_Dbg( p_vod, "RtspCallback query: type=%d", query->i_type );
 946
 947     answer->i_proto   = HTTPD_PROTO_RTSP;
 948     answer->i_version = query->i_version;
 949     answer->i_type    = HTTPD_MSG_ANSWER;
 950     answer->i_body    = 0;
 951     answer->p_body    = NULL;
 952
 953     switch( query->i_type )
 954     {
 955         case HTTPD_MSG_SETUP:
 956         {
 957             psz_playnow = httpd_MsgGet( query, "x-playNow" );
 958             psz_transport = httpd_MsgGet( query, "Transport" );
 959             if( psz_transport == NULL )
 960             {
 961                 answer->i_status = 400;
 962                 break;
 963             }
 964             msg_Dbg( p_vod, "HTTPD_MSG_SETUP: transport=%s", psz_transport );
 965
 966             if( strstr( psz_transport, "unicast" ) &&
 967                 strstr( psz_transport, "client_port=" ) )
 968             {
 969                 rtsp_client_t *p_rtsp = NULL;
 970                 char ip[NI_MAXNUMERICHOST];
 971                 int i_port = atoi( strstr( psz_transport, "client_port=" ) +
 972                                    strlen("client_port=") );
 973
 974                 if( strstr( psz_transport, "MP2T/H2221/UDP" ) ||
 975                     strstr( psz_transport, "RAW/RAW/UDP" ) )
 976                 {
 977                     p_media->psz_mux = p_vod->p_sys->psz_raw_mux;
 978                     p_media->b_raw = true;
 979                 }
 980
 981                 if( httpd_ClientIP( cl, ip, NULL ) == NULL )
 982                 {
 983                     answer->i_status = 500;
 984                     answer->i_body = 0;
 985                     answer->p_body = NULL;
 986                     break;
 987                 }
 988
 989                 msg_Dbg( p_vod, "HTTPD_MSG_SETUP: unicast ip=%s port=%d",
 990                          ip, i_port );
 991
 992                 psz_session = httpd_MsgGet( query, "Session" );
 993                 if( !psz_session || !*psz_session )
 994                 {
 995                     char *psz_new;
 996                     if( ( p_vod->p_sys->i_throttle_users > 0 ) &&
 997                         ( p_vod->p_sys->i_connections >= p_vod->p_sys->i_throttle_users ) )
 998                     {
 999                         answer->i_status = 503;
1000                         answer->i_body = 0;
1001                         answer->p_body = NULL;
1002                         break;
1003                     }
1004 #warning Should use secure randomness here! (spoofing risk)
1005                     if( asprintf( &psz_new, "%lu", vlc_mrand48() ) < 0 )
1006                         return VLC_ENOMEM;
1007                     psz_session = psz_new;
1008
1009                     p_rtsp = RtspClientNew( p_media, psz_new );
1010                     if( !p_rtsp )
1011                     {
1012                         answer->i_status = 454;
1013                         answer->i_body = 0;
1014                         answer->p_body = NULL;
1015                         break;
1016                     }
1017                 }
1018                 else
1019                 {
1020                     p_rtsp = RtspClientGet( p_media, psz_session );
1021                     if( !p_rtsp )
1022                     {
1023                         answer->i_status = 454;
1024                         answer->i_body = 0;
1025                         answer->p_body = NULL;
1026                         break;
1027                     }
1028                 }
1029
1030                 answer->i_status = 200;
1031                 answer->i_body = 0;
1032                 answer->p_body = NULL;
1033
1034                 if( p_media->b_raw )
1035                 {
1036                     p_rtsp->i_port_raw = i_port;
1037
1038                     if( strstr( psz_transport, "MP2T/H2221/UDP" ) )
1039                     {
1040                         httpd_MsgAdd( answer, "Transport",
1041                                       "MP2T/H2221/UDP;unicast;client_port=%d-%d",
1042                                       i_port, i_port + 1 );
1043                     }
1044                     else if( strstr( psz_transport, "RAW/RAW/UDP" ) )
1045                     {
1046                         httpd_MsgAdd( answer, "Transport",
1047                                       "RAW/RAW/UDP;unicast;client_port=%d-%d",
1048                                       i_port, i_port + 1 );
1049                     }
1050                 }
1051                 else
1052                     httpd_MsgAdd( answer, "Transport",
1053                                   "RTP/AVP/UDP;unicast;client_port=%d-%d",
1054                                   i_port, i_port + 1 );
1055             }
1056             else /* TODO  strstr( psz_transport, "interleaved" ) ) */
1057             {
1058                 answer->i_status = 461;
1059                 answer->i_body = 0;
1060                 answer->p_body = NULL;
1061             }
1062
1063             /* Intentional fall-through on x-playNow option in RTSP request */
1064             if( !psz_playnow )
1065                 break;
1066         }
1067
1068         case HTTPD_MSG_PLAY:
1069         {
1070             char *psz_output, ip[NI_MAXNUMERICHOST];
1071             int i_port_audio = 0, i_port_video = 0;
1072
1073             /* for now only multicast so easy */
1074             if( !psz_playnow )
1075             {
1076                 answer->i_status = 200;
1077                 answer->i_body = 0;
1078                 answer->p_body = NULL;
1079             }
1080
1081             if( !psz_session )
1082                 psz_session = httpd_MsgGet( query, "Session" );
1083             msg_Dbg( p_vod, "HTTPD_MSG_PLAY for session: %s", psz_session );
1084
1085             p_rtsp = RtspClientGet( p_media, psz_session );
1086             if( !p_rtsp )
1087             {
1088                 answer->i_status = 500;
1089                 answer->i_body = 0;
1090                 answer->p_body = NULL;
1091                 break;
1092             }
1093
1094             if( p_rtsp->b_playing )
1095             {
1096                 const char *psz_position = httpd_MsgGet( query, "Range" );
1097                 const char *psz_scale = httpd_MsgGet( query, "Scale" );
1098                 if( psz_position )
1099                     psz_position = strstr( psz_position, "npt=" );
1100                 if( psz_position && !psz_scale )
1101                 {
1102                     int64_t i_time = ParseNPT (psz_position + 4);
1103                     msg_Dbg( p_vod, "seeking request: %s", psz_position );
1104                     CommandPush( p_vod, RTSP_CMD_TYPE_SEEK, p_media,
1105                                  psz_session, i_time, 0.0, NULL );
1106                 }
1107                 else if( psz_scale )
1108                 {
1109                     double f_scale = 0.0;
1110                     char *end;
1111
1112                     f_scale = us_strtod( psz_scale, &end );
1113                     if( end > psz_scale )
1114                     {
1115                         f_scale = (f_scale * 30.0);
1116                         if( psz_scale[0] == '-' ) /* rewind */
1117                         {
1118                             msg_Dbg( p_vod, "rewind request: %s", psz_scale );
1119                             CommandPush( p_vod, RTSP_CMD_TYPE_REWIND, p_media,
1120                                          psz_session, 0, f_scale, NULL );
1121                         }
1122                         else if(psz_scale[0] != '1' ) /* fast-forward */
1123                         {
1124                             msg_Dbg( p_vod, "fastforward request: %s",
1125                                      psz_scale );
1126                             CommandPush( p_vod, RTSP_CMD_TYPE_FORWARD, p_media,
1127                                          psz_session, 0, f_scale, NULL );
1128                         }
1129                     }
1130                 }
1131                 /* unpause, in case it's paused */
1132                 CommandPush( p_vod, RTSP_CMD_TYPE_PLAY, p_media, psz_session,
1133                              0, 0.0, "" );
1134                 break;
1135             }
1136
1137             if( httpd_ClientIP( cl, ip, NULL ) == NULL ) break;
1138
1139             p_rtsp->b_playing = true;
1140
1141             /* FIXME for != 1 video and 1 audio */
1142             for( int i = 0; i < p_rtsp->i_es; i++ )
1143             {
1144                 if( p_rtsp->es[i]->p_media_es->fmt.i_cat == AUDIO_ES )
1145                     i_port_audio = p_rtsp->es[i]->i_port;
1146                 if( p_rtsp->es[i]->p_media_es->fmt.i_cat == VIDEO_ES )
1147                     i_port_video = p_rtsp->es[i]->i_port;
1148             }
1149
1150             if( p_media->psz_mux )
1151             {
1152                 if( p_media->b_raw )
1153                 {
1154                     if( asprintf( &psz_output,
1155                               "std{access=udp,dst=%s:%i,mux=%s}",
1156                               ip, p_rtsp->i_port_raw, p_media->psz_mux ) < 0 )
1157                         return VLC_ENOMEM;
1158                 }
1159                 else
1160                 {
1161                     if( asprintf( &psz_output,
1162                               "rtp{dst=%s,port=%i,mux=%s}",
1163                               ip, i_port_video, p_media->psz_mux ) < 0 )
1164                         return VLC_ENOMEM;
1165                 }
1166             }
1167             else
1168             {
1169                 if( asprintf( &psz_output,
1170                               "rtp{dst=%s,port-video=%i,port-audio=%i}",
1171                               ip, i_port_video, i_port_audio ) < 0 )
1172                     return VLC_ENOMEM;
1173             }
1174
1175             CommandPush( p_vod, RTSP_CMD_TYPE_PLAY, p_media, psz_session,
1176                          0, 0.0, psz_output );
1177             free( psz_output );
1178             break;
1179         }
1180
1181         case HTTPD_MSG_DESCRIBE:
1182         {
1183             char *psz_sdp =
1184                 SDPGenerate( p_media, cl );
1185
1186             if( psz_sdp != NULL )
1187             {
1188                 answer->i_status = 200;
1189                 httpd_MsgAdd( answer, "Content-type",  "%s",
1190                               "application/sdp" );
1191
1192                 answer->p_body = (uint8_t *)psz_sdp;
1193                 answer->i_body = strlen( psz_sdp );
1194             }
1195             else
1196             {
1197                 answer->i_status = 500;
1198                 answer->p_body = NULL;
1199                 answer->i_body = 0;
1200             }
1201             break;
1202         }
1203
1204         case HTTPD_MSG_PAUSE:
1205             psz_session = httpd_MsgGet( query, "Session" );
1206             msg_Dbg( p_vod, "HTTPD_MSG_PAUSE for session: %s", psz_session );
1207
1208             p_rtsp = RtspClientGet( p_media, psz_session );
1209             if( !p_rtsp ) break;
1210
1211             CommandPush( p_vod, RTSP_CMD_TYPE_PAUSE, p_media, psz_session,
1212                          0, 0.0, NULL );
1213
1214             answer->i_status = 200;
1215             answer->i_body = 0;
1216             answer->p_body = NULL;
1217             break;
1218
1219         case HTTPD_MSG_TEARDOWN:
1220             /* for now only multicast so easy again */
1221             answer->i_status = 200;
1222             answer->i_body = 0;
1223             answer->p_body = NULL;
1224
1225             psz_session = httpd_MsgGet( query, "Session" );
1226             msg_Dbg( p_vod, "HTTPD_MSG_TEARDOWN for session: %s", psz_session);
1227
1228             p_rtsp = RtspClientGet( p_media, psz_session );
1229             if( !p_rtsp ) break;
1230
1231             CommandPush( p_vod, RTSP_CMD_TYPE_STOP, p_media, psz_session,
1232                          0, 0.0, NULL );
1233             RtspClientDel( p_media, p_rtsp );
1234             break;
1235
1236         case HTTPD_MSG_GETPARAMETER:
1237             answer->i_status = 200;
1238             answer->i_body = 0;
1239             answer->p_body = NULL;
1240             break;
1241
1242         default:
1243             return VLC_EGENERIC;
1244     }
1245
1246     httpd_MsgAdd( answer, "Server", "VLC/%s", VERSION );
1247     httpd_MsgAdd( answer, "Content-Length", "%d", answer->i_body );
1248     psz_cseq = httpd_MsgGet( query, "Cseq" );
1249     psz_cseq ? i_cseq = atoi( psz_cseq ) : 0;
1250     httpd_MsgAdd( answer, "CSeq", "%d", i_cseq );
1251     httpd_MsgAdd( answer, "Cache-Control", "%s", "no-cache" );
1252
1253     if( psz_session )
1254     {
1255          if( p_media->p_vod->p_sys->i_session_timeout >= 0 )
1256              httpd_MsgAdd( answer, "Session", "%s;timeout=%i", psz_session,
1257                p_media->p_vod->p_sys->i_session_timeout );
1258          else
1259               httpd_MsgAdd( answer, "Session", "%s", psz_session );
1260     }
1261
1262     return VLC_SUCCESS;
1263 }
1264
1265 static int RtspCallbackES( httpd_callback_sys_t *p_args, httpd_client_t *cl,
1266                            httpd_message_t *answer,
1267                            const httpd_message_t *query )
1268 {
1269     media_es_t *p_es = (media_es_t*)p_args;
1270     vod_media_t *p_media = p_es->p_media;
1271     vod_t *p_vod = p_media->p_vod;
1272     rtsp_client_t *p_rtsp = NULL;
1273     const char *psz_transport = NULL;
1274     const char *psz_playnow = NULL; /* support option: x-playNow */
1275     const char *psz_session = NULL;
1276     const char *psz_position = NULL;
1277     const char *psz_cseq = NULL;
1278     int i_cseq = 0;
1279
1280     if( answer == NULL || query == NULL ) return VLC_SUCCESS;
1281
1282     msg_Dbg( p_vod, "RtspCallback query: type=%d", query->i_type );
1283
1284     answer->i_proto   = HTTPD_PROTO_RTSP;
1285     answer->i_version = query->i_version;
1286     answer->i_type    = HTTPD_MSG_ANSWER;
1287     answer->i_body    = 0;
1288     answer->p_body      = NULL;
1289
1290     switch( query->i_type )
1291     {
1292         case HTTPD_MSG_SETUP:
1293             psz_playnow = httpd_MsgGet( query, "x-playNow" );
1294             psz_transport = httpd_MsgGet( query, "Transport" );
1295
1296             msg_Dbg( p_vod, "HTTPD_MSG_SETUP: transport=%s", psz_transport );
1297
1298             if( strstr( psz_transport, "unicast" ) &&
1299                 strstr( psz_transport, "client_port=" ) )
1300             {
1301                 rtsp_client_t *p_rtsp = NULL;
1302                 rtsp_client_es_t *p_rtsp_es = NULL;
1303                 char ip[NI_MAXNUMERICHOST];
1304                 int i_port = atoi( strstr( psz_transport, "client_port=" ) +
1305                                    strlen("client_port=") );
1306
1307                 if( httpd_ClientIP( cl, ip, NULL ) == NULL )
1308                 {
1309                     answer->i_status = 500;
1310                     answer->i_body = 0;
1311                     answer->p_body = NULL;
1312                     break;
1313                 }
1314
1315                 msg_Dbg( p_vod, "HTTPD_MSG_SETUP: unicast ip=%s port=%d",
1316                         ip, i_port );
1317
1318                 psz_session = httpd_MsgGet( query, "Session" );
1319                 if( !psz_session || !*psz_session )
1320                 {
1321                     char *psz_new;
1322                     if( ( p_vod->p_sys->i_throttle_users > 0 ) &&
1323                         ( p_vod->p_sys->i_connections >= p_vod->p_sys->i_throttle_users ) )
1324                     {
1325                         answer->i_status = 503;
1326                         answer->i_body = 0;
1327                         answer->p_body = NULL;
1328                         break;
1329                     }
1330 #warning Session ID should be securely random (spoofing risk)
1331                     if( asprintf( &psz_new, "%lu", vlc_mrand48() ) < 0 )
1332                         return VLC_ENOMEM;
1333                     psz_session = psz_new;
1334
1335                     p_rtsp = RtspClientNew( p_media, psz_new );
1336                     if( !p_rtsp )
1337                     {
1338                         answer->i_status = 454;
1339                         answer->i_body = 0;
1340                         answer->p_body = NULL;
1341                         break;
1342                     }
1343                 }
1344                 else
1345                 {
1346                     p_rtsp = RtspClientGet( p_media, psz_session );
1347                     if( !p_rtsp )
1348                     {
1349                         answer->i_status = 454;
1350                         answer->i_body = 0;
1351                         answer->p_body = NULL;
1352                         break;
1353                     }
1354                 }
1355
1356                 p_rtsp_es = malloc( sizeof(rtsp_client_es_t) );
1357                 if( !p_rtsp_es )
1358                 {
1359                     answer->i_status = 500;
1360                     answer->i_body = 0;
1361                     answer->p_body = NULL;
1362                     break;
1363                 }
1364                 p_rtsp_es->i_port = i_port;
1365                 p_rtsp_es->p_media_es = p_es;
1366                 TAB_APPEND( p_rtsp->i_es, p_rtsp->es, p_rtsp_es );
1367
1368                 answer->i_status = 200;
1369                 answer->i_body = 0;
1370                 answer->p_body = NULL;
1371
1372                 if( p_media->b_raw )
1373                 {
1374                     if( strstr( psz_transport, "MP2T/H2221/UDP" ) )
1375                     {
1376                         httpd_MsgAdd( answer, "Transport",
1377                                      "MP2T/H2221/UDP;unicast;client_port=%d-%d",
1378                                      p_rtsp_es->i_port, p_rtsp_es->i_port + 1 );
1379                     }
1380                     else if( strstr( psz_transport, "RAW/RAW/UDP" ) )
1381                     {
1382                         httpd_MsgAdd( answer, "Transport",
1383                                      "RAW/RAW/UDP;unicast;client_port=%d-%d",
1384                                      p_rtsp_es->i_port, p_rtsp_es->i_port + 1 );
1385                     }
1386                 }
1387                 else
1388                 {
1389                     httpd_MsgAdd( answer, "Transport",
1390                                   "RTP/AVP/UDP;unicast;client_port=%d-%d",
1391                                   p_rtsp_es->i_port, p_rtsp_es->i_port + 1 );
1392                 }
1393             }
1394             else /* TODO  strstr( psz_transport, "interleaved" ) ) */
1395             {
1396                 answer->i_status = 461;
1397                 answer->i_body = 0;
1398                 answer->p_body = NULL;
1399             }
1400
1401             /* Intentional fall-through on x-playNow option in RTSP request */
1402             if( !psz_playnow )
1403                 break;
1404
1405         case HTTPD_MSG_PLAY:
1406             /* This is kind of a kludge. Should we only support Aggregate
1407              * Operations ? */
1408             psz_session = httpd_MsgGet( query, "Session" );
1409             msg_Dbg( p_vod, "HTTPD_MSG_PLAY for session: %s", psz_session );
1410
1411             p_rtsp = RtspClientGet( p_media, psz_session );
1412
1413             psz_position = httpd_MsgGet( query, "Range" );
1414             if( psz_position ) psz_position = strstr( psz_position, "npt=" );
1415             if( psz_position )
1416             {
1417                 int64_t i_time = ParseNPT (psz_position + 4);
1418                 msg_Dbg( p_vod, "seeking request: %s", psz_position );
1419                 CommandPush( p_vod, RTSP_CMD_TYPE_SEEK, p_media,
1420                              psz_session, i_time, 0.0, NULL );
1421             }
1422
1423             if( !psz_playnow )
1424             {
1425                 answer->i_status = 200;
1426                 answer->i_body = 0;
1427                 answer->p_body = NULL;
1428             }
1429             break;
1430
1431         case HTTPD_MSG_TEARDOWN:
1432             answer->i_status = 200;
1433             answer->i_body = 0;
1434             answer->p_body = NULL;
1435
1436             psz_session = httpd_MsgGet( query, "Session" );
1437             msg_Dbg( p_vod, "HTTPD_MSG_TEARDOWN for session: %s", psz_session);
1438
1439             p_rtsp = RtspClientGet( p_media, psz_session );
1440             if( !p_rtsp ) break;
1441
1442             for( int i = 0; i < p_rtsp->i_es; i++ )
1443             {
1444                 if( p_rtsp->es[i]->p_media_es == p_es )
1445                 {
1446                     TAB_REMOVE( p_rtsp->i_es, p_rtsp->es, p_rtsp->es[i] );
1447                     break;
1448                 }
1449             }
1450
1451             if( !p_rtsp->i_es )
1452             {
1453                 CommandPush( p_vod, RTSP_CMD_TYPE_STOP, p_media, psz_session,
1454                              0, 0.0, NULL );
1455                 RtspClientDel( p_media, p_rtsp );
1456             }
1457             break;
1458
1459         case HTTPD_MSG_PAUSE:
1460             /* This is kind of a kludge. Should we only support Aggregate
1461              * Operations ? */
1462             psz_session = httpd_MsgGet( query, "Session" );
1463             msg_Dbg( p_vod, "HTTPD_MSG_PAUSE for session: %s", psz_session );
1464
1465             p_rtsp = RtspClientGet( p_media, psz_session );
1466             if( !p_rtsp ) break;
1467
1468             CommandPush( p_vod, RTSP_CMD_TYPE_PAUSE, p_media, psz_session,
1469                          0, 0.0, NULL );
1470
1471             answer->i_status = 200;
1472             answer->i_body = 0;
1473             answer->p_body = NULL;
1474             break;
1475
1476         default:
1477             return VLC_EGENERIC;
1478             break;
1479     }
1480
1481     httpd_MsgAdd( answer, "Server", "VLC/%s", VERSION );
1482     httpd_MsgAdd( answer, "Content-Length", "%d", answer->i_body );
1483     psz_cseq = httpd_MsgGet( query, "Cseq" );
1484     if (psz_cseq)
1485         i_cseq = atoi( psz_cseq );
1486     else
1487         i_cseq = 0;
1488     httpd_MsgAdd( answer, "Cseq", "%d", i_cseq );
1489     httpd_MsgAdd( answer, "Cache-Control", "%s", "no-cache" );
1490
1491     if( psz_session )
1492         httpd_MsgAdd( answer, "Session", "%s"/*;timeout=5*/, psz_session );
1493
1494     return VLC_SUCCESS;
1495 }
1496
1497 /*****************************************************************************
1498  * SDPGenerate: TODO
1499  * FIXME: need to be moved to a common place ?
1500  *****************************************************************************/
1501 static char *SDPGenerate( const vod_media_t *p_media, httpd_client_t *cl )
1502 {
1503     char *psz_sdp, ip[NI_MAXNUMERICHOST];
1504     const char *psz_control;
1505     int port;
1506
1507     if( httpd_ServerIP( cl, ip, &port ) == NULL )
1508         return NULL;
1509
1510     bool ipv6 = ( strchr( ip, ':' ) != NULL );
1511
1512     psz_control = ipv6 ? p_media->psz_rtsp_control_v6
1513                        : p_media->psz_rtsp_control_v4;
1514
1515     /* Dummy destination address for RTSP */
1516     struct sockaddr_storage dst;
1517     socklen_t dstlen = ipv6 ? sizeof( struct sockaddr_in6 )
1518                             : sizeof( struct sockaddr_in );
1519     memset (&dst, 0, dstlen);
1520     dst.ss_family = ipv6 ? AF_INET6 : AF_INET;
1521 #ifdef HAVE_SA_LEN
1522     dst.ss_len = dstlen;
1523 #endif
1524
1525     psz_sdp = vlc_sdp_Start( VLC_OBJECT( p_media->p_vod ), "sout-rtp-",
1526                              NULL, 0, (struct sockaddr *)&dst, dstlen );
1527     if( psz_sdp == NULL )
1528         return NULL;
1529
1530     if( p_media->i_length > 0 )
1531     {
1532         lldiv_t d = lldiv( p_media->i_length / 1000, 1000 );
1533         sdp_AddAttribute( &psz_sdp, "range","npt=0-%lld.%03u", d.quot,
1534                           (unsigned)d.rem );
1535     }
1536
1537     for( int i = 0; i < p_media->i_es; i++ )
1538     {
1539         media_es_t *p_es = p_media->es[i];
1540         const char *mime_major; /* major MIME type */
1541
1542         switch( p_es->fmt.i_cat )
1543         {
1544             case VIDEO_ES:
1545                 mime_major = "video";
1546                 break;
1547             case AUDIO_ES:
1548                 mime_major = "audio";
1549                 break;
1550             case SPU_ES:
1551                 mime_major = "text";
1552                 break;
1553             default:
1554                 continue;
1555         }
1556
1557         sdp_AddMedia( &psz_sdp, mime_major, "RTP/AVP", 0 /* p_es->i_port */,
1558                       p_es->i_payload_type, false, 0,
1559                       p_es->psz_ptname, p_es->i_clock_rate, p_es->i_channels,
1560                       p_es->psz_fmtp );
1561
1562         sdp_AddAttribute( &psz_sdp, "control", psz_control, ip, port, i );
1563     }
1564
1565     return psz_sdp;
1566 }