src/api/sipe-core.h

   1 /**
   2  * @file sipe-core.h
   3  *
   4  * pidgin-sipe
   5  *
   6  * Copyright (C) 2010-2017 SIPE Project <http://sipe.sourceforge.net/>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 /**
  24  *
  25  * Backend -> SIPE Core API - functions called by backend code
  26  *
  27  ***************** !!! IMPORTANT NOTE FOR BACKEND CODERS !!! *****************
  28  *
  29  *            The SIPE core assumes atomicity and is *NOT* thread-safe.
  30  *
  31  * It *does not* protect any of its data structures or code paths with locks!
  32  *
  33  * In no circumstances it must be interrupted by another thread calling
  34  * sipe_core_xxx() while the first thread has entered the SIPE core through
  35  * a sipe_core_xxx() function.
  36  *
  37  ***************** !!! IMPORTANT NOTE FOR BACKEND CODERS !!! *****************
  38  */
  39
  40 #ifdef __cplusplus
  41 extern "C" {
  42 #endif
  43
  44 /**
  45  * Transport type
  46  */
  47 #define SIPE_TRANSPORT_AUTO 0
  48 #define SIPE_TRANSPORT_TLS  1
  49 #define SIPE_TRANSPORT_TCP  2
  50
  51 /**
  52  * Transport connection (public part)
  53  *
  54  * The receiver in the backend fills "buffer". The backend has to zero
  55  * terminate the buffer before calling the processing function in the core.
  56  *
  57  * The processing function in the core can remove content from the buffer.
  58  * It has to update buffer_used accordingly.
  59  *
  60  */
  61 struct sipe_transport_connection {
  62         gpointer user_data;
  63         gchar *buffer;
  64         gsize buffer_used;        /* 0 < buffer_used < buffer_length */
  65         gsize buffer_length;      /* read-only */
  66         guint type;               /* read-only */
  67         guint client_port;        /* read-only */
  68 };
  69
  70 /**
  71  * Opaque data type for chat session
  72  */
  73 struct sipe_chat_session;
  74
  75 /**
  76  * File transport (public part)
  77  */
  78 struct sipe_file_transfer {
  79         struct sipe_backend_file_transfer *backend_private;
  80
  81         void (* ft_init)(struct sipe_file_transfer *ft, const gchar *filename,
  82                          gsize size, const gchar *who);
  83         void (* ft_start)(struct sipe_file_transfer *ft, gsize total_size);
  84         gssize (* ft_read)(struct sipe_file_transfer *ft, guchar **buffer,
  85                            gsize bytes_remaining, gsize bytes_available);
  86         gssize (* ft_write)(struct sipe_file_transfer *ft, const guchar *buffer,
  87                             gsize size);
  88         gboolean (* ft_end)(struct sipe_file_transfer *ft);
  89         void (* ft_request_denied)(struct sipe_file_transfer *ft);
  90         void (* ft_cancelled)(struct sipe_file_transfer *ft);
  91 };
  92
  93 /**
  94  * Opaque data type for backend private data.
  95  * The backend is responsible to allocate and free it.
  96  */
  97 struct sipe_backend_private;
  98
  99 /**
 100  * SIP transport authentication scheme
 101  */
 102 #define SIPE_AUTHENTICATION_TYPE_UNSET     0
 103 #define SIPE_AUTHENTICATION_TYPE_BASIC     1 /* internal use only */
 104 #define SIPE_AUTHENTICATION_TYPE_NTLM      2
 105 #define SIPE_AUTHENTICATION_TYPE_KERBEROS  3
 106 #define SIPE_AUTHENTICATION_TYPE_NEGOTIATE 4 /* internal use only */
 107 #define SIPE_AUTHENTICATION_TYPE_TLS_DSK   5
 108 #define SIPE_AUTHENTICATION_TYPE_AUTOMATIC 6 /* always last */
 109
 110 /**
 111  * Flags
 112  */
 113 /* user disabled calendar information publishing */
 114 #define SIPE_CORE_FLAG_DONT_PUBLISH    0x00000001
 115 /* user enabled insecure buddy icon download from web */
 116 #define SIPE_CORE_FLAG_ALLOW_WEB_PHOTO 0x00000002
 117
 118 #define SIPE_CORE_FLAG_IS(flag)    \
 119         ((sipe_public->flags & SIPE_CORE_FLAG_ ## flag) == SIPE_CORE_FLAG_ ## flag)
 120 #define SIPE_CORE_FLAG_SET(flag)   \
 121         (sipe_public->flags |= SIPE_CORE_FLAG_ ## flag)
 122 #define SIPE_CORE_FLAG_UNSET(flag) \
 123         (sipe_public->flags &= ~SIPE_CORE_FLAG_ ## flag)
 124
 125 /**
 126  * Byte length of cryptographic key for call encryption.
 127  */
 128 #define SIPE_SRTP_KEY_LEN 30
 129
 130 /**
 131  * Public part of the Sipe data structure
 132  *
 133  * This part contains the information needed by the core and the backend.
 134  */
 135 struct sipe_core_public {
 136         /**
 137          * This points to the private data for the backend.
 138          * The backend is responsible to allocate and free it.
 139          */
 140         struct sipe_backend_private *backend_private;
 141
 142         /* flags (see above) */
 143         guint32 flags;
 144
 145         /* user information */
 146         gchar *sip_name;
 147         gchar *sip_domain;
 148
 149         /* server information */
 150         /* currently nothing */
 151 };
 152
 153 /**
 154  * Initialize & destroy functions for the SIPE core
 155  * Should be called on loading and unloading of the plugin.
 156  */
 157 void sipe_core_init(const char *locale_dir);
 158 void sipe_core_destroy(void);
 159
 160 /** Utility functions exported by the core to backends ***********************/
 161 gboolean sipe_strequal(const gchar *left, const gchar *right);
 162 gboolean sipe_strcase_equal(const gchar *left, const gchar *right);
 163
 164 GSList *
 165 sipe_utils_nameval_add(GSList *list, const gchar *name, const gchar *value);
 166
 167 const gchar *
 168 sipe_utils_nameval_find(const GSList *list, const gchar *name);
 169
 170 const gchar *
 171 sipe_utils_nameval_find_instance(const GSList *list, const gchar *name, int which);
 172
 173 void
 174 sipe_utils_nameval_free(GSList *list);
 175
 176 gchar *sip_uri_from_name(const gchar *name);
 177 gchar *sip_uri_if_valid(const gchar *string);
 178
 179 /*****************************************************************************/
 180
 181 /**
 182  * Other functions (need to be sorted once structure becomes clear.
 183  */
 184
 185 /* Get translated about string. Must be g_free'd(). */
 186 gchar *sipe_core_about(void);
 187
 188 /* Execute a scheduled action */
 189 void sipe_core_schedule_execute(gpointer data);
 190
 191 /* menu actions */
 192 void sipe_core_update_calendar(struct sipe_core_public *sipe_public);
 193 void sipe_core_reset_status(struct sipe_core_public *sipe_public);
 194
 195 /* access levels */
 196 void sipe_core_change_access_level_from_container(struct sipe_core_public *sipe_public,
 197                                                   gpointer parameter);
 198 void sipe_core_change_access_level_for_domain(struct sipe_core_public *sipe_public,
 199                                               const gchar *domain,
 200                                               guint index);
 201
 202 /**
 203  * Activity
 204  *   - core:    maps this to OCS protocol values
 205  *              maps this to translated descriptions
 206  *   - backend: maps this to backend status values
 207  *              backend token string can be used as "ID" in protocol
 208  *
 209  * This is passed back-and-forth and therefore defined as list, not as enum.
 210  * Can be used as array index
 211  */
 212 #define SIPE_ACTIVITY_UNSET        0
 213 #define SIPE_ACTIVITY_AVAILABLE    1
 214 #define SIPE_ACTIVITY_ONLINE       2
 215 #define SIPE_ACTIVITY_INACTIVE     3
 216 #define SIPE_ACTIVITY_BUSY         4
 217 #define SIPE_ACTIVITY_BUSYIDLE     5
 218 #define SIPE_ACTIVITY_DND          6
 219 #define SIPE_ACTIVITY_BRB          7
 220 #define SIPE_ACTIVITY_AWAY         8
 221 #define SIPE_ACTIVITY_LUNCH        9
 222 #define SIPE_ACTIVITY_INVISIBLE   10
 223 #define SIPE_ACTIVITY_OFFLINE     11
 224 #define SIPE_ACTIVITY_ON_PHONE    12
 225 #define SIPE_ACTIVITY_IN_CONF     13
 226 #define SIPE_ACTIVITY_IN_MEETING  14
 227 #define SIPE_ACTIVITY_OOF         15
 228 #define SIPE_ACTIVITY_URGENT_ONLY 16
 229 #define SIPE_ACTIVITY_NUM_TYPES   17 /* use to define array size */
 230
 231 const gchar *sipe_core_activity_description(guint type);
 232
 233 /* buddy actions */
 234 /**
 235  * Get status text for buddy.
 236  *
 237  * @param sipe_public Sipe core public data structure.
 238  * @param uri         SIP URI of the buddy
 239  * @param activity    activity value for buddy
 240  * @param status_text backend-specific buddy status text for activity.
 241  *
 242  * @return HTML status text for the buddy or NULL. Must be g_free()'d.
 243  */
 244 gchar *sipe_core_buddy_status(struct sipe_core_public *sipe_public,
 245                               const gchar *uri,
 246                               guint activity,
 247                               const gchar *status_text);
 248
 249 void sipe_core_buddy_got_status(struct sipe_core_public *sipe_public,
 250                                 const gchar *uri,
 251                                 guint activity);
 252
 253 /**
 254  * Trigger generation of buddy information label/text pairs
 255  *
 256  * @param sipe_public Sipe core public data structure.
 257  * @param uri         SIP URI of the buddy
 258  * @param status_text backend-specific buddy status text for ID.
 259  * @param is_online   backend considers buddy to be online.
 260  * @param tooltip     opaque backend identifier for tooltip info. This is the
 261  *                    parameter given to @c sipe_backend_buddy_tooltip_add()
 262  */
 263 struct sipe_backend_buddy_tooltip;
 264 void sipe_core_buddy_tooltip_info(struct sipe_core_public *sipe_public,
 265                                   const gchar *uri,
 266                                   const gchar *status_name,
 267                                   gboolean is_online,
 268                                   struct sipe_backend_buddy_tooltip *tooltip);
 269
 270 /**
 271  * Add a buddy
 272  *
 273  * @param sipe_public Sipe core public data structure
 274  * @param uri         SIP URI of the buddy
 275  * @param group_name  backend-specific group name
 276  */
 277 void sipe_core_buddy_add(struct sipe_core_public *sipe_public,
 278                          const gchar *uri,
 279                          const gchar *group_name);
 280
 281 /**
 282  * Remove a buddy
 283  *
 284  * @param sipe_public Sipe core public data structure
 285  * @param uri         SIP URI of the buddy
 286  * @param group_name  backend-specific group name
 287  */
 288 void sipe_core_buddy_remove(struct sipe_core_public *sipe_public,
 289                             const gchar *uri,
 290                             const gchar *group_name);
 291
 292 void sipe_core_contact_allow_deny(struct sipe_core_public *sipe_public,
 293                                   const gchar *who,
 294                                   gboolean allow);
 295 void sipe_core_group_set_alias(struct sipe_core_public *sipe_public,
 296                                const gchar *who,
 297                                const gchar *alias);
 298
 299 /**
 300  * Setup core data
 301  */
 302 struct sipe_core_public *sipe_core_allocate(const gchar *signin_name,
 303                                             gboolean sso,
 304                                             const gchar *login_account,
 305                                             const gchar *password,
 306                                             const gchar *email,
 307                                             const gchar *email_url,
 308                                             const gchar **errmsg);
 309 void sipe_core_deallocate(struct sipe_core_public *sipe_public);
 310
 311 /**
 312  * Check if SIP authentication scheme requires a password
 313  *
 314  * NOTE: this can be called *BEFORE* @c sipe_core_allocate()!
 315  *
 316  * @param authentication SIP transport authentication type
 317  * @param sso            TRUE if user selected Single-Sign On
 318  *
 319  * @return TRUE if password is required
 320  */
 321 gboolean sipe_core_transport_sip_requires_password(guint authentication,
 322                                                    gboolean sso);
 323
 324 /**
 325  * Connect to SIP server
 326  */
 327 void sipe_core_transport_sip_connect(struct sipe_core_public *sipe_public,
 328                                      guint transport,
 329                                      guint authentication,
 330                                      const gchar *server,
 331                                      const gchar *port);
 332
 333 /**
 334  * Get SIP server host name
 335  *
 336  * @param sipe_public Sipe core public data structure
 337  *
 338  * @return server host name (may be @c NULL if not fully connected yet)
 339  */
 340 const gchar *sipe_core_transport_sip_server_name(struct sipe_core_public *sipe_public);
 341
 342 /**
 343  * Get chat ID, f.ex. group chat URI
 344  */
 345 const gchar *sipe_core_chat_id(struct sipe_core_public *sipe_public,
 346                                struct sipe_chat_session *chat_session);
 347
 348 /**
 349  * Get type of chat session, e.g. group chat
 350  */
 351 #define SIPE_CHAT_TYPE_UNKNOWN    0
 352 #define SIPE_CHAT_TYPE_MULTIPARTY 1
 353 #define SIPE_CHAT_TYPE_CONFERENCE 2
 354 #define SIPE_CHAT_TYPE_GROUPCHAT  3
 355 guint sipe_core_chat_type(struct sipe_chat_session *chat_session);
 356
 357 /**
 358  * Invite to chat
 359  */
 360 void sipe_core_chat_invite(struct sipe_core_public *sipe_public,
 361                            struct sipe_chat_session *chat_session,
 362                            const char *name);
 363
 364 /**
 365  * Rejoin a chat after connection re-establishment
 366  */
 367 void sipe_core_chat_rejoin(struct sipe_core_public *sipe_public,
 368                            struct sipe_chat_session *chat_session);
 369
 370 /**
 371  * Leave a chat
 372  */
 373 void sipe_core_chat_leave(struct sipe_core_public *sipe_public,
 374                           struct sipe_chat_session *chat_session);
 375
 376 /**
 377  * Send message to chat
 378  */
 379 void sipe_core_chat_send(struct sipe_core_public *sipe_public,
 380                          struct sipe_chat_session *chat_session,
 381                          const char *what);
 382
 383 /**
 384  * Check chat lock status
 385  */
 386 typedef enum {
 387         SIPE_CHAT_LOCK_STATUS_NOT_ALLOWED = 0,
 388         SIPE_CHAT_LOCK_STATUS_UNLOCKED,
 389         SIPE_CHAT_LOCK_STATUS_LOCKED
 390 } sipe_chat_lock_status;
 391 sipe_chat_lock_status sipe_core_chat_lock_status(struct sipe_core_public *sipe_public,
 392                                                  struct sipe_chat_session *chat_session);
 393
 394 /**
 395  * Lock chat
 396  */
 397 void sipe_core_chat_modify_lock(struct sipe_core_public *sipe_public,
 398                                 struct sipe_chat_session *chat_session,
 399                                 const gboolean locked);
 400
 401 /**
 402  * Create new session with Focus URI
 403  *
 404  * @param sipe_public (in) SIPE core data.
 405  * @param focus_uri (in) focus URI string
 406  */
 407 void sipe_core_conf_create(struct sipe_core_public *sipe_public,
 408                            const gchar *focus_uri,
 409                            const gchar *organizer,
 410                            const gchar *meeting_id);
 411
 412 /* buddy menu callback: parameter == chat_session */
 413 void sipe_core_conf_make_leader(struct sipe_core_public *sipe_public,
 414                                 gpointer parameter,
 415                                 const gchar *buddy_name);
 416 void sipe_core_conf_remove_from(struct sipe_core_public *sipe_public,
 417                                 gpointer parameter,
 418                                 const gchar *buddy_name);
 419
 420 gchar *
 421 sipe_core_conf_entry_info(struct sipe_core_public *sipe_public,
 422                           struct sipe_chat_session *chat_session);
 423
 424 /**
 425  * Checks if given chat session has an open RDP client window.
 426  *
 427  * @param sipe_public (in) SIPE core data.
 428  * @param chat_session (in) chat session structure
 429  *
 430  * @return @c TRUE if RDP session is in progress.
 431  */
 432 gboolean
 433 sipe_core_conf_is_viewing_appshare(struct sipe_core_public *sipe_public,
 434                                    struct sipe_chat_session *chat_session);
 435
 436 /* call control (CSTA) */
 437 void sipe_core_buddy_make_call(struct sipe_core_public *sipe_public,
 438                                const gchar *phone);
 439
 440 /* media */
 441 void sipe_core_media_initiate_call(struct sipe_core_public *sipe_public,
 442                                    const char *participant,
 443                                    gboolean with_video);
 444 struct sipe_media_call;
 445 struct sipe_media_stream *
 446 sipe_core_media_get_stream_by_id(struct sipe_media_call *call, const gchar *id);
 447
 448 /**
 449  * Called by media backend after a candidate pair for a media stream component
 450  * has been established.
 451  *
 452  * @param stream (in) SIPE media stream data.
 453  */
 454 void
 455 sipe_core_media_stream_candidate_pair_established(struct sipe_media_stream *stream);
 456
 457 void
 458 sipe_core_media_stream_readable(struct sipe_media_stream *stream);
 459
 460 /**
 461  * Called by media backend when a @c SIPE_MEDIA_APPLICATION stream changes its
 462  * state between writable and unwritable.
 463  *
 464  * @param stream (in) SIPE media stream data.
 465  * @param writable (in) @c TRUE if stream has become writable, otherwise
 466  *                 @c FALSE.
 467  */
 468 void
 469 sipe_core_media_stream_writable(struct sipe_media_stream *stream,
 470                                 gboolean writable);
 471
 472 /**
 473  * Called by media backend when @c stream has ended and should be destroyed.
 474  *
 475  * @param stream (in) SIPE media stream data.
 476  */
 477 void
 478 sipe_core_media_stream_end(struct sipe_media_stream *stream);
 479
 480 /**
 481  * Connects to a conference call specified by given chat session
 482  *
 483  * @param sipe_public (in) SIPE core data.
 484  * @param chat_session (in) chat session structure
 485  */
 486 void sipe_core_media_connect_conference(struct sipe_core_public *sipe_public,
 487                                         struct sipe_chat_session *chat_session);
 488
 489 /**
 490  * Retrieves the media call in progress
 491  *
 492  * The function checks only for voice and video calls, ignoring other types of
 493  * data transfers.
 494  *
 495  * @param sipe_public (in) SIPE core data.
 496  *
 497  * @return @c sipe_media_call structure or @c NULL if call is not in progress.
 498  */
 499 struct sipe_media_call *
 500 sipe_core_media_get_call(struct sipe_core_public *sipe_public);
 501
 502 /**
 503  * Initiates a call with given phone number
 504  *
 505  * @param sipe_public (in) SIPE core data.
 506  * @parem phone_number (in) a mobile or landline phone number, i.e. +46123456
 507  */
 508 void sipe_core_media_phone_call(struct sipe_core_public *sipe_public,
 509                                 const gchar *phone_number);
 510
 511 /**
 512  * Checks voice quality by making a call to the test service
 513  *
 514  * @param sipe_public (in) SIPE core data.
 515  */
 516 void sipe_core_media_test_call(struct sipe_core_public *sipe_public);
 517
 518 /* file transfer */
 519 struct sipe_file_transfer *
 520 sipe_core_ft_create_outgoing(struct sipe_core_public *sipe_public,
 521                              const gchar *who,
 522                              const gchar *file);
 523
 524 /* application sharing */
 525
 526 /**
 527  * Connects to a meeting's presentation
 528  *
 529  * @param sipe_public (in) SIPE core data.
 530  * @param chat_session (in) chat session structure
 531  * @param user_must_accept (in) @c TRUE if user should be shown accept/decline
 532  *                         dialog before the action can proceed.
 533  */
 534 void sipe_core_appshare_connect_conference(struct sipe_core_public *sipe_public,
 535                                            struct sipe_chat_session *chat_session,
 536                                            gboolean user_must_accept);
 537
 538 /* group chat */
 539 gboolean sipe_core_groupchat_query_rooms(struct sipe_core_public *sipe_public);
 540 void sipe_core_groupchat_join(struct sipe_core_public *sipe_public,
 541                               const gchar *uri);
 542
 543 /* IM */
 544 void sipe_core_im_send(struct sipe_core_public *sipe_public,
 545                        const gchar *who,
 546                        const gchar *what);
 547 void sipe_core_im_close(struct sipe_core_public *sipe_public,
 548                         const gchar *who);
 549
 550 /* user */
 551 void sipe_core_user_feedback_typing(struct sipe_core_public *sipe_public,
 552                                     const gchar *to,
 553                                     gboolean typing);
 554
 555 void sipe_core_user_ask_cb(gpointer key, gboolean accepted);
 556
 557 /* groups */
 558 void sipe_core_group_rename(struct sipe_core_public *sipe_public,
 559                             const gchar *old_name,
 560                             const gchar *new_name);
 561
 562 void sipe_core_group_remove(struct sipe_core_public *sipe_public,
 563                             const gchar *name);
 564
 565 /* buddies */
 566 void sipe_core_buddy_group(struct sipe_core_public *sipe_public,
 567                            const gchar *who,
 568                            const gchar *old_group_name,
 569                            const gchar *new_group_name);
 570
 571 struct sipe_backend_search_token;
 572 void sipe_core_buddy_search(struct sipe_core_public *sipe_public,
 573                             struct sipe_backend_search_token *token,
 574                             const gchar *given_name,
 575                             const gchar *surname,
 576                             const gchar *email,
 577                             const gchar *sipid,
 578                             const gchar *company,
 579                             const gchar *country);
 580
 581 void sipe_core_buddy_get_info(struct sipe_core_public *sipe_public,
 582                               const gchar *who);
 583
 584 void sipe_core_buddy_new_chat(struct sipe_core_public *sipe_public,
 585                               const gchar *who);
 586 void sipe_core_buddy_send_email(struct sipe_core_public *sipe_public,
 587                                 const gchar *who);
 588
 589 struct sipe_backend_buddy_menu;
 590 struct sipe_backend_buddy_menu *sipe_core_buddy_create_menu(struct sipe_core_public *sipe_public,
 591                                                             const gchar *buddy_name,
 592                                                             struct sipe_backend_buddy_menu *menu);
 593
 594 void sipe_core_buddy_menu_free(struct sipe_core_public *sipe_public);
 595
 596 /**
 597  * User/Machine has changed the user status
 598  *
 599  * NOTE: must *NEVER* be triggered by @c sipe_backend_status_and_note()!
 600  *
 601  * @param sipe_public   The handle representing the protocol instance
 602  * @param set_by_user   @c TRUE if status has been changed by user
 603  * @param activity      New activity
 604  * @param message       New note text
 605  */
 606 void sipe_core_status_set(struct sipe_core_public *sipe_public,
 607                           gboolean set_by_user,
 608                           guint activity,
 609                           const gchar *note);
 610
 611 #define SIPE_MSRTP_VSR_HEADER_LEN  20
 612 #define SIPE_MSRTP_VSR_ENTRY_LEN   0x44
 613 #define SIPE_MSRTP_VSR_FCI_WORDLEN \
 614         (SIPE_MSRTP_VSR_HEADER_LEN + SIPE_MSRTP_VSR_ENTRY_LEN) / 4
 615
 616 #define SIPE_MSRTP_VSR_SOURCE_ANY  0xFFFFFFFE
 617 #define SIPE_MSRTP_VSR_SOURCE_NONE 0xFFFFFFFF
 618
 619 /**
 620  * Fills @buffer with Video Source Request described in [MS-RTP] 2.2.12.2.
 621  *
 622  * @param buffer (out) destination the VSR will be written to. The byte length
 623  *               of @c buffer MUST be at least @c SIPE_MSRTP_VSR_HEADER_LEN +
 624  *               @c SIPE_MSRTP_VSR_ENTRY_LEN.
 625  * @param payload_type (in) payload ID of the codec negotiated with the peer.
 626  */
 627 void sipe_core_msrtp_write_video_source_request(guint8 *buffer,
 628                                                 guint8 payload_type);
 629
 630 /**
 631  * Fills @buffer with customized Payload Content Scalability Information packet
 632  * described in [MS-H264PF] consisting of a Stream Layout SEI Message (section
 633  * 2.2.5) and a Bitstream Info SEI Message (section 2.2.7).
 634  *
 635  * @param buffer (out) destination the PACSI will be written to.
 636  * @param nal_count (in) number of NAL units this packet describes.
 637  *
 638  * @return Byte length of the PACSI packet.
 639  */
 640 gsize sipe_core_msrtp_write_video_scalability_info(guint8 *buffer,
 641                                                    guint8 nal_count);
 642
 643 #ifdef __cplusplus
 644 }
 645 #endif
 646
 647 /*
 648   Local Variables:
 649   mode: c
 650   c-file-style: "bsd"
 651   indent-tabs-mode: t
 652   tab-width: 8
 653   End:
 654 */