gtk2_ardour/imageframe_socket_handler.h

   1 /*
   2     Copyright (C) 2003 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #ifndef __ardour_gtk_imageframe_socket_handler_h__
  21 #define __ardour_gtk_imageframe_socket_handler_h__
  22
  23 #include <string>
  24 #include <list>
  25 #include "editor.h"
  26 #include "ardour_image_compositor_socket.h"
  27
  28 class TimeAxisViewItem ;
  29 class ImageFrameView ;
  30 class MarkerView ;
  31 class ImageFrameTimeAxisGroup ;
  32
  33 /**
  34  * ImageFrameSocketHandler defines the handler between Ardour and an Image Compositor
  35  * As this is purely visual, we do all processing within the main gtk loop via
  36  * message passing through a socket.
  37  *
  38  */
  39 class ImageFrameSocketHandler : public sigc::trackable
  40 {
  41         public:
  42                 /**
  43                  * Constructs a new ImageFrameSocketHandler to handle communication between Ardour and the Image Compositor
  44                  *
  45                  * @param ed the PublicEditor
  46                  */
  47                 ImageFrameSocketHandler(PublicEditor& ed) ;
  48
  49                 /**
  50                  * Descructor
  51                  * this will shutdown the socket if open
  52                  */
  53                 virtual ~ImageFrameSocketHandler() ;
  54
  55                 /**
  56                  * Returns the instance of the ImageFrameSocketHandler
  57                  * the instance should first be created with createInstance
  58                  *
  59                  * @return the instance of the ImageFrameSocketHandler
  60                  */
  61                 static ImageFrameSocketHandler* get_instance() ;
  62
  63                 /**
  64                  * call back to handle doing the processing work
  65                  * This method is added to the gdk main loop and called when there is data
  66                  * upon the socket.
  67                  *
  68                  */
  69                 static void image_socket_callback(void *arg, int32_t fd, GdkInputCondition cond) ;
  70
  71                 /**
  72                  * Attempt to connect to the image compositor on the specified host and port
  73                  *
  74                  * @param hostIp the ip address of the image compositor host
  75                  * @param port the oprt number to attemp the connection on
  76                  * @return true if the connection was a succees
  77                  *         false otherwise
  78                  */
  79                 bool connect(const char * hostIp, int32_t port) ;
  80
  81                 /**
  82                  * Closes the connection to th Image Compositor
  83                  *
  84                  */
  85                  void close_connection() ;
  86                 /**
  87                  * Returns true if this ImagFrameSocketHandler is currently connected to rthe image compositor
  88                  *
  89                  * @return true if connected to the image compositor
  90                  */
  91                 bool is_connected() ;
  92
  93                 /**
  94                  * Sets the tag used to describe this input within gtk
  95                  * this is returned when gdk_input_add is called and is required to remove the input
  96                  *
  97                  * @param tag the gdk input tag of this input
  98                  */
  99                 void set_gdk_input_tag(int tag) ;
 100
 101                 /**
 102                  * Returns the gdk input tag of this input
 103                  *
 104                  * @return the gdk input tag of this input
 105                  * @see setGdkInputTag
 106                  */
 107                 int get_gdk_input_tag() ;
 108
 109
 110                 /**
 111                  * Returns the socket file descriptor
 112                  *
 113                  * @return the Sockt file descriptor
 114                  */
 115                 int get_socket_descriptor() ;
 116
 117
 118                 //---------------------------------------------------------------------------------------//
 119                 // Handle Sending messages to the Image Compositor
 120
 121                 //----------------------------
 122                 // ImageFrameTimeAxis Messages
 123
 124                 /**
 125                  * Sends a message stating that the named image frame time axis has been removed
 126                  *
 127                  * @param track_id the unique id of the removed image frame time axis
 128                  * @param src the identity of the object that initiated the change
 129                  */
 130                 void send_imageframe_time_axis_removed(const string & track_id, void* src) ;
 131
 132                 /**
 133                  * Sends a message indicating that an ImageFrameTimeAxis has been renamed
 134                  *
 135                  * @param new_id the new name, or Id, of the track
 136                  * @param old_id the old name, or Id, of the track
 137                  * @param src the identity of the object that initiated the change
 138                  * @param time_axis the time axis that has changed
 139                  */
 140                 void send_imageframe_time_axis_renamed(const string & new_id, const string & old_id, void* src, ImageFrameTimeAxis* time_axis) ;
 141
 142                 //------------------------
 143                 // MarkerTimeAxis Messages
 144
 145                 /**
 146                  * Sends a message stating that the named marker time axis has been removed
 147                  *
 148                  * @param track_id the unique id of the removed image frame time axis
 149                  * @param src the identity of the object that initiated the change
 150                  */
 151                 void send_marker_time_axis_removed(const string & track_id, void* src) ;
 152
 153                 /**
 154                  * Sends a message indicating that an MarkerTimeAxis has been renamed
 155                  *
 156                  * @param new_id the new name, or Id, of the track
 157                  * @param old_id the old name, or Id, of the track
 158                  * @param src the identity of the object that initiated the change
 159                  * @param time_axis the time axis that has changed
 160                  */
 161                 void send_marker_time_axis_renamed(const string & new_id, const string & old_id, void* src, MarkerTimeAxis* time_axis) ;
 162
 163
 164                 //---------------------------------
 165                 // ImageFrameTimeAxisGroup Messages
 166
 167                 /**
 168                  * Sends a message stating that the group has been removed
 169                  *
 170                  * @param group_id the unique id of the removed image frame time axis
 171                  * @param src the identity of the object that initiated the change
 172                  * @param group the group that has changed
 173                  */
 174                 void send_imageframe_time_axis_group_removed(const string & group_id, void* src, ImageFrameTimeAxisGroup* group) ;
 175
 176                 /**
 177                  * Send a message indicating that an ImageFrameTimeAxisGroup has been renamed
 178                  *
 179                  * @param new_id the new name, or Id, of the group
 180                  * @param old_id the old name, or Id, of the group
 181                  * @param src the identity of the object that initiated the change
 182                  * @param group the group that has changed
 183                  */
 184                 void send_imageframe_time_axis_group_renamed(const string & new_id, const string & old_id, void* src, ImageFrameTimeAxisGroup* group) ;
 185
 186
 187                 //---------------------------------
 188                 // ImageFrameView Messages
 189
 190                 /**
 191                  * Send an Image Frame View Item position changed message
 192                  *
 193                  * @param pos the new position value
 194                  * @param src the identity of the object that initiated the change
 195                  * @param item the time axis item whos position has changed
 196                  */
 197                 void send_imageframe_view_position_change(nframes_t pos, void* src, ImageFrameView* item) ;
 198
 199                 /**
 200                  * Send a Image Frame View item duration changed message
 201                  *
 202                  * @param dur the the new duration value
 203                  * @param src the identity of the object that initiated the change
 204                  * @param item the item which has had a duration change
 205                  */
 206                 void send_imageframe_view_duration_change(nframes_t dur, void* src, ImageFrameView* item) ;
 207
 208                 /**
 209                  * Send a message indicating that an ImageFrameView has been renamed
 210                  *
 211                  * @param item the ImageFrameView which has been renamed
 212                  * @param src the identity of the object that initiated the change
 213                  * @param item the renamed item
 214                  */
 215                 void send_imageframe_view_renamed(const string & new_id, const string & old_id, void* src, ImageFrameView* item) ;
 216
 217                 /**
 218                  * Send a message indicating that an ImageFrameView item has been removed message
 219                  *
 220                  * @param item_id the id of the item that was removed
 221                  * @param src the identity of the object that initiated the change
 222                  * @param item the removed item
 223                  */
 224                 void send_imageframe_view_removed(const string & item_id, void* src, ImageFrameView* item) ;
 225
 226                 //---------------------------------
 227                 // MarkerView Messages
 228
 229                 /**
 230                  * Send a Marker View Item position changed message
 231                  *
 232                  * @param pos the new position value
 233                  * @param src the identity of the object that initiated the change
 234                  * @param item the time axis item whos position has changed
 235                  */
 236                 void send_marker_view_position_change(nframes_t pos, void* src, MarkerView* item) ;
 237
 238                 /**
 239                  * Send a Marker View item duration changed message
 240                  *
 241                  * @param dur the new duration value
 242                  * @param src the identity of the object that initiated the change
 243                  * @param item the time axis item whos position has changed
 244                  */
 245                 void send_marker_view_duration_change(nframes_t dur, void* src, MarkerView* item) ;
 246
 247                 /**
 248                  * Send a message indicating that a MarkerView has been renamed
 249                  *
 250                  * @param new_id the new_id of the object
 251                  * @param old_id the old_id of the object
 252                  * @param src the identity of the object that initiated the change
 253                  * @param item the MarkerView which has been renamed
 254                  */
 255                 void send_marker_view_renamed(const string & new_id, const string & old_id, void* src, MarkerView* item) ;
 256
 257                 /**
 258                  * Send a message indicating that a MarkerView  item has been removed message
 259                  *
 260                  * @param item_id the id of the item that was removed
 261                  * @param src the identity of the object that initiated the change
 262                  * @param item the MarkerView which has been removed
 263                  */
 264                 void send_marker_view_removed(const string & item_id, void* src, MarkerView* item) ;
 265
 266
 267                 //---------------------------------------------------------------------------------------//
 268                 // Emitted Signals
 269
 270                 /** Emitted if the socket connection is shutdown at the other end */
 271                 sigc::signal<void> CompositorSocketShutdown ;
 272
 273                 /** Emitted as a generic error is captured from the socket connection to the animatic compositor */
 274                 sigc::signal<void> CompositorSocketError ;
 275
 276
 277         protected:
 278
 279
 280         private:
 281                 /* I dont like friends :-( */
 282                 friend class Editor;
 283
 284                 /**
 285                  * Create an new instance of the ImageFrameSocketHandler, if one does not already exist
 286                  *
 287                  * @param ed the Ardour PublicEditor
 288                  */
 289                 static ImageFrameSocketHandler* create_instance(PublicEditor& ed) ;
 290
 291                 //---------------------------------------------------------------------------------------//
 292                 // Message breakdown ie avoid a big if...then...else
 293
 294                 /**
 295                  * Handle insert item requests
 296                  *
 297                  * @param msg the received message
 298                  */
 299                 void handle_insert_message(const char* msg) ;
 300
 301                 /**
 302                  * Handle remove item requests
 303                  *
 304                  * @param msg the received message
 305                  */
 306                 void handle_remove_message(const char* msg) ;
 307
 308                 /**
 309                  * Handle rename item requests
 310                  *
 311                  * @param msg the received message
 312                  */
 313                 void handle_rename_message(const char* msg) ;
 314
 315                 /**
 316                  * Handle a request for session information
 317                  *
 318                  * @param msg the received message
 319                  */
 320                 void handle_request_data(const char* msg) ;
 321
 322                 /**
 323                  * Handle the update of a particular item
 324                  *
 325                  * @param msg the received message
 326                  */
 327                 void handle_item_update_message(const char* msg) ;
 328
 329                 /**
 330                  * Handle the selection of an Item
 331                  *
 332                  * @param msg the received message
 333                  */
 334                 void handle_item_selected(const char* msg) ;
 335
 336                 /**
 337                  * Handle s session action message
 338                  *
 339                  * @param msg the received message
 340                  */
 341                 void handle_session_action(const char* msg) ;
 342
 343                 //---------------------------------------------------------------------------------------//
 344                 // handlers for specific insert procedures
 345
 346                 /**
 347                  * Handle the insertion of a new ImaegFrameTimeAxis
 348                  *
 349                  * @param msg the received message
 350                  */
 351                 void handle_insert_imageframe_time_axis(const char* msg) ;
 352
 353                 /**
 354                  * Handle the insertion of a new MarkerTimeAxis
 355                  *
 356                  * @param msg the received message
 357                  */
 358                 void handle_insert_marker_time_axis(const char* msg) ;
 359
 360                 /**
 361                  * Handle the insertion of a time axis group (a scene)
 362                  *
 363                  * @param msg the received message
 364                  */
 365                 void handle_insert_imageframe_group(const char* msg) ;
 366
 367                 /**
 368                  * Handle the insertion of a new ImageFrameItem
 369                  *
 370                  * @param msg the received message
 371                  */
 372                 void handle_insert_imageframe_view(const char* msg) ;
 373
 374                 /**
 375                  * Handle the insertion of a new MarkerItem
 376                  *
 377                  * @param msg the received message
 378                  */
 379                 void handle_insert_marker_view(const char* msg) ;
 380
 381                 //---------------------------------------------------------------------------------------//
 382                 // handlers for specific removal procedures
 383
 384                 /**
 385                  * Handle the removal of an ImageTimeAxis
 386                  *
 387                  * @param msg the received message
 388                  */
 389                 void handle_remove_imageframe_time_axis(const char* msg) ;
 390
 391                 /**
 392                  * Handle the removal of an MarkerTimeAxis
 393                  *
 394                  * @param msg the received message
 395                  */
 396                 void handle_remove_marker_time_axis(const char* msg) ;
 397
 398                 /**
 399                  * Handle the removal of an ImageFrameTimeAxisGroup
 400                  *
 401                  * @param msg the received message
 402                  */
 403                 void handle_remove_imageframe_time_axis_group(const char* msg) ;
 404
 405                 /**
 406                  * Handle the removal of an ImageFrameItem
 407                  *
 408                  * @param msg the received message
 409                  */
 410                 void handle_remove_imageframe_view(const char* msg) ;
 411
 412                 /**
 413                  * Handle the removal of an MarkerItem
 414                  *
 415                  * @param msg the received message
 416                  */
 417                 void handle_remove_marker_view(const char* msg) ;
 418
 419                 //---------------------------------------------------------------------------------------//
 420                 // handlers for the specific rename procedures
 421
 422                 /**
 423                  * Handle the renaming of an ImageTimeAxis
 424                  *
 425                  * @param msg the received message
 426                  */
 427                 void handle_rename_imageframe_time_axis(const char* msg) ;
 428
 429                 /**
 430                  * Handle the renaming of an MarkerTimeAxis
 431                  *
 432                  * @param msg the received message
 433                  */
 434                 void handle_rename_marker_time_axis(const char* msg) ;
 435
 436                 /**
 437                  * Handle the renaming of an ImageFrameItem
 438                  *
 439                  * @param msg the received message
 440                  */
 441                 void handle_rename_imageframe_time_axis_group(const char* msg) ;
 442
 443                 /**
 444                  * Handle the renaming of an ImageFrameItem
 445                  *
 446                  * @param msg the received message
 447                  */
 448                 void handle_rename_imageframe_view(const char* msg) ;
 449
 450                 /**
 451                  * Handle the renaming of an Marker
 452                  *
 453                  * @param msg the received message
 454                  */
 455                 void handle_rename_marker_view(const char* msg) ;
 456
 457                 //---------------------------------------------------------------------------------------//
 458                 // handlers for data request
 459
 460                 /**
 461                  * Handle a request for the sessnio naem fo the current session
 462                  * We return a failure state if no session is open
 463                  *
 464                  * @param msg the received message
 465                  */
 466                 void handle_session_name_request(const char* msg) ;
 467
 468
 469                 //---------------------------------------------------------------------------------------//
 470                 // handlers for specific item update changes
 471
 472                 /**
 473                  * Handle ImageFrameView positional changes
 474                  *
 475                  * @param msg the received message
 476                  */
 477                 void handle_imageframe_view_position_update(const char* msg) ;
 478
 479                 /**
 480                  * Handle ImageFrameView Duration changes
 481                  *
 482                  * @param msg the received message
 483                  */
 484                 void handle_imageframe_view_duration_update(const char* msg) ;
 485
 486                 /**
 487                  * Handle ImageFrameView Position Lock Constraint changes
 488                  *
 489                  * @param msg the received message
 490                  */
 491                 void handle_imageframe_position_lock_update(const char* msg) ;
 492
 493                 /**
 494                  * Handle ImageFrameView Maximum Duration changes
 495                  *
 496                  * @param msg the received message
 497                  */
 498                 void handle_imageframe_view_max_duration_update(const char* msg) ;
 499
 500                 /**
 501                  * Handle image frame max duration enable constraint changes
 502                  *
 503                  * @param msg the received message
 504                  */
 505                 void handle_imageframe_view_max_duration_enable_update(const char* msg) ;
 506
 507                 /**
 508                  * Handle ImageFrameView Minimum Duration changes
 509                  *
 510                  * @param msg the received message
 511                  */
 512                 void handle_imageframe_view_min_duration_update(const char* msg) ;
 513
 514                 /**
 515                  * Handle image frame min duration enable constraint changes
 516                  *
 517                  * @param msg the received message
 518                  */
 519                 void handle_imageframe_view_min_duration_enable_update(const char* msg) ;
 520
 521
 522                 /**
 523                  * Handle MarkerView position changes
 524                  *
 525                  * @param msg the received message
 526                  */
 527                 void handle_marker_view_position_update(const char* msg) ;
 528
 529                 /**
 530                  * Handle MarkerView duration changes
 531                  *
 532                  * @param msg the received message
 533                  */
 534                 void handle_marker_view_duration_update(const char* msg) ;
 535
 536                 /**
 537                  * Handle MarkerView Position Lock Constraint changes
 538                  *
 539                  * @param msg the received message
 540                  */
 541                 void handle_marker_view_position_lock_update(const char* msg) ;
 542
 543                 /**
 544                  * Handle MarkerView maximum duration changes
 545                  *
 546                  * @param msg the received message
 547                  */
 548                 void handle_marker_view_max_duration_update(const char* msg) ;
 549
 550                 /**
 551                  * Handle MarkerView minimum duration changes
 552                  *
 553                  * @param msg the received message
 554                  */
 555                 void handle_marker_view_min_duration_update(const char* msg) ;
 556
 557
 558
 559                 //---------------------------------------------------------------------------------------//
 560                 // handlers for Session Actions
 561
 562                 /**
 563                  * Handle the opening of a named audio session
 564                  *
 565                  * @param msg the received message
 566                  */
 567                 void handle_open_session(const char* msg) ;
 568
 569                 /**
 570                  * Handle the closing of a named audio session
 571                  *
 572                  * @param msg the received message
 573                  */
 574                 void handle_closed_session(const char* msg) ;
 575
 576                 //---------------------------------------------------------------------------------------//
 577                 // handlers for the shutdown of the Image Compositor
 578
 579                 /**
 580                  * Handle the shutdown message from the image compositor
 581                  *
 582                  * @param msg the received message
 583                  */
 584                 void handle_shutdown(const char* msg) ;
 585
 586
 587                 //---------------------------------------------------------------------------------------//
 588                 // convenince methods to break up messages
 589
 590                 /**
 591                  * Returns part of the received message as a std::string
 592                  *
 593                  * @param start the start character
 594                  * @param num_chars the number of characters to read
 595                  * @param the message to break apart
 596                  * @return the sub string of the message
 597                  */
 598                 std::string get_message_part(int start, int32_t num_chars, const char* msg) ;
 599
 600
 601                 /**
 602                  * break up am image item description message
 603                  * we break the mesage up into the parent Image Track id and size,
 604                  * the parent group id and size, and the image id and size
 605                  *
 606                  * @param track_id
 607                  * @param track_id_size
 608                  * @param scene_id
 609                  * @param scene_id_size
 610                  * @param item_id
 611                  * @param item_id_size
 612                  */
 613                 void decompose_imageframe_item_desc(const char* msg, int& position, std::string& track_id, int& track_id_size, std::string& scene_id, int& scene_id_size, std::string& item_id, int& item_id_size) ;
 614
 615                 /**
 616                  * Compose a description of the specified image frame view
 617                  * The description consists of the parent track name size and name,
 618                  * the parent group name size and name, and the item name size and name
 619                  *
 620                  * @param ifv the item to compose a description of
 621                  * @param buffer the buffer to write the description
 622                  */
 623                 void compose_imageframe_item_desc(ImageFrameView* ifv, std::ostringstream& buffer) ;
 624
 625                 /**
 626                  * Compose a description of the specified marker view
 627                  * The description consists of the parent track name size and name,
 628                  * and the item name size and name
 629                  *
 630                  * @param mv the item to compose a description of
 631                  * @param buffer the buffer to write the description
 632                  */
 633                 void compose_marker_item_desc(MarkerView* mv, std::ostringstream& buffer) ;
 634
 635
 636                 /**
 637                  * Returns the ImageFrameView from the specified description
 638                  * The errcode parameter is used to indicate the item which caused
 639                  * an error on failure of this method
 640                  * 0 = suces
 641                  * 1 = the track item was not found
 642                  * 2 = the group item was not found
 643                  * 3 = the imageframe item was not found
 644                  *
 645                  * @paran track_id the track on which the item is placed
 646                  * @param group_id the group in which the item is a member
 647                  * @param item_id the id of the item
 648                  * @param int32_t reference used for error codes on failure
 649                  * @param errmsg populated with a description of the error on failure
 650                  * @return the described item on success, 0 otherwise
 651                  */
 652                 ImageFrameView* get_imageframe_view_from_desc(const string & track_id, const string & group_ud, const string & item_id, int& errcode, std::string& errmsg) ;
 653
 654                 //---------------------------------------------------------------------------------------//
 655                 // Convenince Message Send Methods
 656
 657                 /**
 658                  * Sends a message throught the socket
 659                  *
 660                  * @param msg the message to send
 661                  * @return the return value of the socket call
 662                  */
 663                 int send_message(const string & msg) ;
 664
 665                 /**
 666                  * Reads a message from the Socket
 667                  *
 668                  * @param msg a string to populate with the received message
 669                  * @return the return value from the socket call
 670                  */
 671                 int read_message(std::string& msg) ;
 672
 673                 /**
 674                  * Reads a return message ("RT0"/"RT1") from the Socket
 675                  *
 676                  * @return true if "RT0" was received,, otherwise false
 677                  */
 678                 bool read_result();
 679
 680                 /**
 681                  * Convenience method to compose and send a success messasge back to the Image Compositor
 682                  *
 683                  */
 684                 void send_return_success() ;
 685
 686                 /**
 687                  * Convenience method to compose and send a failure messasge back to the Image Compositor
 688                  *
 689                  * @param msg the failure message
 690                  */
 691                 void send_return_failure(const std::string& msg) ;
 692
 693                 //---------------------------------------------------------------------------------------//
 694                 // Memebr Data
 695
 696                 /** Our instance of the socket handler, singleton */
 697                 static ImageFrameSocketHandler* _instance ;
 698
 699                 /** The Ardour PublicEditor */
 700                 PublicEditor& thePublicEditor ;
 701
 702                 /** the socket file descriptor */
 703                 int theArdourToCompositorSocket ;
 704
 705                 /** This stores the 'tag' returned from gdk_input_add, which is required for removing the input */
 706                 int theGdkInputTag ;
 707
 708 } ; /* class ImageFrameSocketHandler */
 709
 710 #endif /* __ardour_gtk_imageframe_socket_handler_h__ */