AlsaMixer.app/Mixer.cc

   1 //
   2 //  Mixer.app
   3 //
   4 //  Copyright (c) 1998-2002 Per Liden
   5 //
   6 //  This program is free software; you can redistribute it and/or modify
   7 //  it under the terms of the GNU General Public License as published by
   8 //  the Free Software Foundation; either version 2 of the License, or
   9 //  (at your option) any later version.
  10 //
  11 //  This program is distributed in the hope that it will be useful,
  12 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 //  GNU General Public License for more details.
  15 //
  16 //  You should have received a copy of the GNU General Public License
  17 //  along with this program; if not, write to the Free Software
  18 //  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307,
  19 //  USA.
  20 //
  21
  22 #include <X11/Xlib.h>
  23 #include <iostream>
  24 #include <fstream>
  25 #include <cstdlib>
  26 #include <cstring>
  27 #include <csignal>
  28 #include "Xpm.h"
  29 #include "Mixer.h"
  30
  31 #include "AMixer/AMixer.h"
  32
  33 #include "pixmaps/main.xpm"
  34 #include "pixmaps/button.xpm"
  35 #include "pixmaps/mutebutton.xpm"
  36 #include "pixmaps/redlight.xpm"
  37
  38 #define ROUND_POS(x)    (int ((x) + 0.5) > int (x)) ? (int) ((x) + 1) : (int) (x)
  39
  40 using namespace std;
  41
  42 static const int ButtonX[] = {6, 24, 42};
  43 static const char* MixerSources[] = { "Master", "PCM", "CD" };
  44
  45 extern Mixer* app;
  46
  47 void catchBrokenPipe(int sig)
  48 {
  49    app->saveVolumeSettings();
  50    exit(0);
  51 }
  52
  53 int positionToPercent(int position) {
  54   return ROUND_POS(100 - (((position - BUTTON_MAX) * 100.0) / (BUTTON_MIN - BUTTON_MAX)));
  55 }
  56
  57 int percentToPosition(int percent) {
  58   return ROUND_POS(BUTTON_MIN - (percent * (BUTTON_MIN - BUTTON_MAX)) / 100.0);
  59 }
  60
  61 Mixer::Mixer(int argc, char** argv)
  62 {
  63    XClassHint classHint;
  64    XSizeHints sizeHints;
  65    XWMHints   wmHints;
  66    Atom       deleteWindow;
  67    Xpm*       image;
  68    char*      displayName = NULL;
  69    char*      card = "default";
  70
  71    mError = 0;
  72    mInstanceName = INSTANCENAME;
  73    mVolumeSource[0] = -1;
  74    mVolumeSource[1] = -1;
  75    mVolumeSource[2] = -1;
  76    mVolumeMute[0] = 0;
  77    mVolumeMute[1] = 0;
  78    mVolumeMute[2] = 0;
  79    mWheelButton = 1;
  80    mLabelText = 0;
  81    mSettingsFile = 0;
  82    mSaveSettings = false;
  83    mLoadSettings = false;
  84    mCommand = NULL;
  85
  86    // Parse command line
  87    if (argc>1) {
  88       for (int i=1; i<argc; i++) {
  89          // Display
  90          if (!strcmp(argv[i], "-d")) {
  91             checkArgument(argv, argc, i);
  92             displayName = argv[i+1];
  93             i++;
  94          }
  95
  96          // Sound source
  97          else if (!strcmp(argv[i], "-1") || !strcmp(argv[i], "-2") || !strcmp(argv[i], "-3")) {
  98             checkArgument(argv, argc, i);
  99             MixerSources[argv[i][1] - '1'] = argv[i + 1];
 100             i++;
 101          }
 102
 103          // Wheel binding
 104          else if (!strcmp(argv[i], "-w")) {
 105             checkArgument(argv, argc, i);
 106             mWheelButton = atoi(argv[i+1]);
 107
 108             if (mWheelButton < 1 || mWheelButton > 3) {
 109                cerr << APPNAME << ": invalid wheel binding, must be 1, 2 or 3, not " << argv[i+1] << endl;
 110                tryHelp(argv[0]);
 111                exit(0);
 112             }
 113
 114             i++;
 115          }
 116
 117          // Label text
 118          else if (!strcmp(argv[i], "-l")) {
 119             checkArgument(argv, argc, i);
 120             mLabelText = argv[i+1];
 121             i++;
 122          }
 123
 124          // Save settings on exit
 125          else if (!strcmp(argv[i], "-S")) {
 126             mSaveSettings = true;
 127          }
 128
 129          // Load settings on startup
 130          else if (!strcmp(argv[i], "-L")) {
 131             mLoadSettings = true;
 132          }
 133
 134          // Load/Save settings file
 135          else if (!strcmp(argv[i], "-f")) {
 136             checkArgument(argv, argc, i);
 137             mSettingsFile = argv[i+1];
 138             i++;
 139          }
 140
 141          // Execute command on middle click
 142          else if (!strcmp(argv[i], "-e")) {
 143            checkArgument(argv, argc, i);
 144            mCommand = argv[i + 1];
 145            i++;
 146          }
 147
 148          // Instance name
 149          else if (!strcmp(argv[i], "-n")) {
 150             checkArgument(argv, argc, i);
 151             mInstanceName = argv[i+1];
 152             i++;
 153          }
 154
 155          // Version
 156          else if (!strcmp(argv[i], "-v")) {
 157             cerr << APPNAME << " version " << VERSION << endl;
 158             exit(0);
 159          }
 160
 161          // Help
 162          else if (!strcmp(argv[i], "-h") || !strcmp(argv[i], "--help")) {
 163             showHelp();
 164             exit(0);
 165          }
 166
 167          // card
 168          else if (!strcmp(argv[i], "--card")) {
 169            card = AMixer::convertIDToCard(argv[i + 1]);
 170            if (!card) {
 171              cerr << APPNAME << ": invalid card number '" << argv[i + 1] << "'" << endl;
 172              tryHelp(argv[0]);
 173              exit(0);
 174            }
 175            i++;
 176          }
 177
 178          // device
 179          else if (!strcmp(argv[i], "--device")) {
 180            card = argv[i + 1];
 181            i++;
 182          }
 183
 184          // Unknown option
 185          else {
 186             cerr << APPNAME << ": invalid option '" << argv[i] << "'" << endl;
 187             tryHelp(argv[0]);
 188             exit(0);
 189          }
 190       }
 191    }
 192
 193    // default settings file
 194    if (!mSettingsFile) {
 195      char* home = getenv("HOME");
 196      if (home) {
 197        mSettingsFile = new char[strlen(home) + strlen(SETTINGS) + 1];
 198        strcpy(mSettingsFile, home);
 199        strcat(mSettingsFile, SETTINGS);
 200      } else {
 201        cerr << APPNAME << ": $HOME not set, could not find saved settings" << endl;
 202      }
 203    }
 204
 205    // init mixer
 206    aMixer = new AMixer(card);
 207    if (!aMixer->opened()) {
 208      cerr << APPNAME << ": could not open mixer device for card '" << card << "'" << endl;
 209      exit(0);
 210    }
 211
 212    // open mixer sources
 213    for (int i = 0; i < 3; i++) {
 214      aMixer->attachItem(i, MixerSources[i]);
 215      if (!aMixer->itemOK(i))
 216        cerr << APPNAME << ": could not select mixer source '" << MixerSources[i] << "'" << endl;
 217    }
 218
 219    // Open display
 220    if ((mDisplay = XOpenDisplay(displayName)) == NULL) {
 221       cerr << APPNAME << ": could not open display " << displayName << endl;
 222       exit(0);
 223    }
 224
 225    // Get root window
 226    mRoot = RootWindow(mDisplay, DefaultScreen(mDisplay));
 227
 228    // Create windows
 229    mAppWin = XCreateSimpleWindow(mDisplay, mRoot, 1, 1, 64, 64, 0, 0, 0);
 230    mIconWin = XCreateSimpleWindow(mDisplay, mAppWin, 0, 0, 64, 64, 0, 0, 0);
 231
 232    // Set classhint
 233    classHint.res_name =  mInstanceName;
 234    classHint.res_class = CLASSNAME;
 235    XSetClassHint(mDisplay, mAppWin, &classHint);
 236
 237    // Create delete atom
 238    deleteWindow = XInternAtom(mDisplay, "WM_DELETE_WINDOW", False);
 239    XSetWMProtocols(mDisplay, mAppWin, &deleteWindow, 1);
 240    XSetWMProtocols(mDisplay, mIconWin, &deleteWindow, 1);
 241
 242    // Set windowname
 243    XStoreName(mDisplay, mAppWin, APPNAME);
 244    XSetIconName(mDisplay, mAppWin, APPNAME);
 245
 246    // Set sizehints
 247    sizeHints.flags= USPosition;
 248    sizeHints.x = 0;
 249    sizeHints.y = 0;
 250    XSetWMNormalHints(mDisplay, mAppWin, &sizeHints);
 251
 252    // Set wmhints
 253    wmHints.initial_state = WithdrawnState;
 254    wmHints.icon_window = mIconWin;
 255    wmHints.icon_x = 0;
 256    wmHints.icon_y = 0;
 257    wmHints.window_group = mAppWin;
 258    wmHints.flags = StateHint | IconWindowHint | IconPositionHint | WindowGroupHint;
 259    XSetWMHints(mDisplay, mAppWin, &wmHints);
 260
 261    // Set command
 262    XSetCommand(mDisplay, mAppWin, argv, argc);
 263
 264    // Set background image
 265    image = new Xpm(mDisplay, mRoot, main_xpm);
 266    if (mLabelText) {
 267       image->drawString(LABEL_X, LABEL_Y, mLabelText);
 268    }
 269    image->setWindowPixmapShaped(mIconWin);
 270    delete image;
 271
 272    // Create buttons
 273    mButton[0] = XCreateSimpleWindow(mDisplay, mIconWin, ButtonX[0], BUTTON_MIN, 5, 5, 0, 0, 0);
 274    mButton[1] = XCreateSimpleWindow(mDisplay, mIconWin, ButtonX[1], BUTTON_MIN, 5, 5, 0, 0, 0);
 275    mButton[2] = XCreateSimpleWindow(mDisplay, mIconWin, ButtonX[2], BUTTON_MIN, 5, 5, 0, 0, 0);
 276
 277    image = new Xpm(mDisplay, mRoot, button_xpm);
 278    image->setWindowPixmap(mButton[0]);
 279    image->setWindowPixmap(mButton[1]);
 280    image->setWindowPixmap(mButton[2]);
 281    delete image;
 282
 283    XSelectInput(mDisplay, mButton[0], ButtonPressMask | ButtonReleaseMask | PointerMotionMask);
 284    XSelectInput(mDisplay, mButton[1], ButtonPressMask | ButtonReleaseMask | PointerMotionMask);
 285    XSelectInput(mDisplay, mButton[2], ButtonPressMask | ButtonReleaseMask | PointerMotionMask);
 286    XSelectInput(mDisplay, mIconWin, ButtonPressMask);
 287
 288    XMapWindow(mDisplay, mButton[0]);
 289    XMapWindow(mDisplay, mButton[1]);
 290    XMapWindow(mDisplay, mButton[2]);
 291
 292    XMapWindow(mDisplay, mIconWin);
 293    XMapWindow(mDisplay, mAppWin);
 294    XSync(mDisplay, False);
 295
 296    // Catch broker pipe signal
 297    signal(SIGPIPE, catchBrokenPipe);
 298
 299    // Check if error
 300    if (mError) {
 301       showErrorLed();
 302    } else {
 303       getVolume();
 304       if (mLoadSettings)
 305         loadVolumeSettings();
 306    }
 307 }
 308
 309 void Mixer::tryHelp(char* appname)
 310 {
 311    cerr << "Try `" << appname << " --help' for more information" << endl;
 312 }
 313
 314 void Mixer::showHelp()
 315 {
 316    cerr << APPNAME << " Copyright (c) 1998-2002 by Per Liden (per@fukt.bth.se), Petr Hlavka (xhlavk00@stud.fit.vutbr.cz)" << endl << endl
 317         << "options:" << endl
 318         << " -1 <source>     set sound source for control 1 (default is Master)" << endl
 319         << " -2 <source>     set sound source for control 2 (default is PCM)" << endl
 320         << " -3 <source>     set sound source for control 3 (default is CD)" << endl
 321         << " -w 1|2|3        bind a control button to the mouse wheel (default is 1)" << endl
 322         << " -l <text>       set label text" << endl
 323         << " -S              save volume settings on exit" << endl
 324         << " -L              load volume settings on start up" << endl
 325         << " -f <file>       use setting <file> instead of ~/GNUstep/Defaults/AlsaMixer" << endl
 326         << " --card <id>     select card" << endl
 327         << " --device <dev>  select device, default 'default'" << endl
 328         << " -e <command>    execute <command> on middle click" << endl
 329         << " -n <name>       set client instance name" << endl
 330         << " -d <disp>       set display" << endl
 331         << " -v              print version and exit" << endl
 332         << " -h, --help      display this help and exit" << endl << endl;
 333 }
 334
 335 void Mixer::checkArgument(char** argv, int argc, int index)
 336 {
 337    if (argc-1 < index+1) {
 338       cerr << APPNAME << ": option '" << argv[index] << "' requires an argument" << endl;
 339       tryHelp(argv[0]);
 340       exit(0);
 341    }
 342 }
 343
 344 void Mixer::showErrorLed()
 345 {
 346    Window led;
 347    Xpm*   image;
 348
 349    led = XCreateSimpleWindow(mDisplay, mIconWin, LED_X, LED_Y, 3, 2, 0, 0, 0);
 350
 351    // Set background image
 352    image = new Xpm(mDisplay, mRoot, redlight_xpm);
 353    image->setWindowPixmap(led);
 354    delete image;
 355
 356    // Show window
 357    XMapWindow(mDisplay, led);
 358    mError = 1;
 359 }
 360
 361 void Mixer::loadVolumeSettings()
 362 {
 363    if (mSettingsFile) {
 364       ifstream file(mSettingsFile);
 365       if (file) {
 366          // This could fail if the user has edited the file by hand and destroyed the structure
 367          char dummy[1024];
 368          file >> dummy; // {
 369          file >> dummy; // Volume1
 370          file >> dummy; // =
 371          file >> mVolume[0];
 372          file >> dummy; // ;
 373
 374          file >> dummy; // Volume2
 375          file >> dummy; // =
 376          file >> mVolume[1];
 377          file >> dummy; // ;
 378
 379          file >> dummy; // Volume3
 380          file >> dummy; // =
 381          file >> mVolume[2];
 382
 383          file.close();
 384          for (int i = 0; i < 3; i++) {
 385            setVolume(i, mVolume[i]);
 386            setButtonPosition(i, percentToPosition(mVolume[i]));
 387          }
 388       }
 389    }
 390 }
 391
 392 void Mixer::saveVolumeSettings()
 393 {
 394    if (mSaveSettings) {
 395       ofstream file(mSettingsFile);
 396       if (file) {
 397          // Files in ~/GNUstep/Defaults/ should follow the property list format
 398          file << "{" << endl
 399               << "  Volume1 = " << mVolumePos[0] << ";" << endl
 400               << "  Volume2 = " << mVolumePos[1] << ";" << endl
 401               << "  Volume3 = " << mVolumePos[2] << ";" << endl
 402               << "}" << endl;
 403          file.close();
 404       } else {
 405          cerr << APPNAME << ": failed to save volume settings in " << mSettingsFile << endl;
 406       }
 407    }
 408 }
 409
 410 void Mixer::getVolume()
 411 {
 412    static int lastVolume[3] = {-1, -1, -1};
 413    static int lastVolumeMute[3] = {-1, -1, -1};
 414
 415    if (mError) {
 416       return;
 417    }
 418
 419    // Read from device
 420    for (int i=0; i<3; i++) {
 421       mVolume[i] = aMixer->itemGetVolume(i);
 422       mVolumeMute[i] = aMixer->itemIsMuted(i);
 423
 424       if (lastVolume[i] != mVolume[i]) {
 425          int y;
 426
 427          // Set button position
 428          if (mError) {
 429             y = BUTTON_MIN;
 430          } else {
 431             y = percentToPosition(mVolume[i]);
 432          }
 433
 434          setButtonPosition(i, y);
 435          lastVolume[i] = mVolume[i];
 436       }
 437
 438       // set buttom type muted/unmuted
 439       if (lastVolumeMute[i] != mVolumeMute[i]) {
 440         setButtonType(i);
 441         lastVolumeMute[i] = mVolumeMute[i];
 442       }
 443    }
 444
 445    if (mError) {
 446       cerr << APPNAME << ": unable to read from " << mMixerDevice << endl;
 447       showErrorLed();
 448       return;
 449    }
 450 }
 451
 452 void Mixer::setVolume(int button, int volume)
 453 {
 454    if (mError) {
 455       return;
 456    }
 457
 458    // Store volume
 459    mVolume[button] = volume;
 460
 461    // Write to device
 462    aMixer->itemSetVolume(button, mVolume[button]);
 463 }
 464
 465 void Mixer::toggleMute(int button)
 466 {
 467   mVolumeMute[button] = !mVolumeMute[button];
 468   aMixer->itemToggleMute(button);
 469   setButtonType(button);
 470 }
 471
 472 void Mixer::setButtonType(int button)
 473 {
 474    Xpm* image;
 475
 476    if (mVolumeMute[button] == 1) {              // muted
 477       image = new Xpm(mDisplay, mRoot, mutebutton_xpm);
 478       image->setWindowPixmap(mButton[button]);
 479       delete image;
 480
 481       XClearWindow(mDisplay, mButton[button]);
 482    } else {
 483       image = new Xpm(mDisplay, mRoot, button_xpm);
 484       image->setWindowPixmap(mButton[button]);
 485       delete image;
 486
 487       XClearWindow(mDisplay, mButton[button]);
 488    }
 489 }
 490
 491 void Mixer::setButtonPosition(int button, int position) {
 492    if (position > BUTTON_MIN) {
 493       position = BUTTON_MIN;
 494    } else if (position < BUTTON_MAX) {
 495       position = BUTTON_MAX;
 496    }
 497
 498    XMoveWindow(mDisplay, mButton[button], ButtonX[button], position);
 499
 500    mVolumePos[button] = position;
 501 }
 502
 503 void Mixer::setButtonPositionRelative(int button, int relativePosition)
 504 {
 505    int y;
 506
 507    // Calc new button position
 508    y = mVolumePos[button] + relativePosition;
 509
 510    if (y > BUTTON_MIN) {
 511       y = BUTTON_MIN;
 512    } else if (y < BUTTON_MAX) {
 513       y = BUTTON_MAX;
 514    }
 515
 516    // Set button position and volume
 517    XMoveWindow(mDisplay, mButton[button], ButtonX[button], y);
 518
 519    mVolumePos[button] = y;
 520
 521    // set volume
 522    setVolume(button, positionToPercent(y));
 523 }
 524
 525 void Mixer::run()
 526 {
 527    XEvent event;
 528    int    buttonDown = 0;
 529    int    buttonDownPosition = 0;
 530
 531    // Start handling events
 532    while(1) {
 533       while(XPending(mDisplay) || buttonDown) {
 534          XNextEvent(mDisplay, &event);
 535
 536          switch(event.type) {
 537          case ButtonPress:
 538             if (event.xbutton.button == Button4 || event.xbutton.button == Button5) {
 539                // Wheel scroll
 540                setButtonPositionRelative(mWheelButton - 1, event.xbutton.button == Button5? 3: -3);
 541             } else if (event.xbutton.button == Button1 && event.xbutton.window != mIconWin) {
 542                // Volume change
 543                buttonDown = 1;
 544                buttonDownPosition = event.xbutton.y;
 545             } else if (event.xbutton.button == Button3 && buttonDown == 0 && event.xbutton.window != mIconWin) {
 546                // Mute
 547                for (int i=0; i<3; i++) {
 548                   if (mButton[i] == event.xbutton.window) {
 549                      toggleMute(i);
 550                      break;
 551                   }
 552                }
 553             } else if (event.xbutton.button == Button2) {
 554                // Load defaults or execute command
 555                if (mCommand) {
 556                  char command[512];
 557
 558                  snprintf(command, 512, "%s &", mCommand);
 559                  system(command);
 560                }
 561                else
 562                  loadVolumeSettings();
 563             }
 564             break;
 565
 566          case ButtonRelease:
 567             if (event.xbutton.button == Button1) {
 568                buttonDown = 0;
 569             }
 570             break;
 571
 572          case MotionNotify:
 573             if (buttonDown) {
 574                // Find button
 575                for (int i=0; i<3; i++) {
 576                   if (mButton[i] == event.xmotion.window) {
 577                      setButtonPositionRelative(i, event.xmotion.y - buttonDownPosition);
 578                      break;
 579                   }
 580                }
 581             }
 582             break;
 583          }
 584       }
 585
 586       // Idle for a moment
 587       usleep(100000);
 588
 589       // Update volume status
 590       aMixer->handleEvents();
 591       if (AMixer::mixerChanged())
 592         aMixer->reInit();
 593       else if (AMixer::mixerElemsChanged())
 594         getVolume();
 595       XSync(mDisplay, False);
 596    }
 597 }
 598