// ======================================================================
// W space: Multi star - fractal sound creation tool
// (CC) 2009 Jens Koeplinger, http://www.jenskoeplinger.com/P
// License: Creative Commons Attribution "Share Alike 3.0 Unported"
// http://creativecommons.org/licenses/by-sa/3.0
// See main file "wspacemultistarsound.c" for what this means to you!
// ======================================================================
// run-wspacemultistarsound.c
// ----------------------------------------------------------------------
// parses out the command line (runtime) parameters

    if ((argc == 1) || (argv[1][0] == '-')) {
        //  no command line argument given,
        // or first argument started with dash;
        // --> print help and abort

#include "help-wspacemultistarsound.c"

        return;

    }

    //  at least one command line argument given; display raw
    printf("[NOTE] For help: run without arguments\n");
    printf("-------------------------------------\n");
    printf("Number of command line arguments = %d\n", argc);

    for (i = 0; i < argc; i++) {
        printf("- Arg. #%d = \"%s\"\n", i, argv[i]);
    }

//  (naively) parse command line parameters, if present, and
//  convert them, and overwrite global variables

    if (argc > 1) outputMode = atoi(argv[1]);

    switch (outputMode) {
        case 0:  // calculate the multi-star sound fractal

                 // set default values:
                 baseFrequency = 50.;             // base frequency, in Herz ( s^(-1) )
                 convergencePercentage = 1.;      // convergence percentage of the outline to be played
                 totalLength = 5.;                // total length of the WAV file, in seconds
                 convergenceSweepTo = 1.;         // 2nd (target) convergence percentage (for sweep)
                 isSweep = 0;                     // default: this is not a sweep
                 sweepStepWidth = 0.;             // default: continuous sweeps (if specified)
                 isContinuous = -1;
                 amplitudeMultiplier = 1.;        // full amplitude (1.)
                 amplitudeSweepTo = 1.;           // 2nd (target) amplitude multiplier

                 // read command line arguments, if present:
                 if (argc > 2) baseFrequency = atof(argv[2]);
                 if (argc > 3) convergencePercentage = atof(argv[3]);
                 if (argc > 4) totalLength = atof(argv[4]);
                 if (argc > 5) {
                     convergenceSweepTo = atof(argv[5]);
                     isSweep = -1;
                 }
                 if (argc > 6) sweepStepWidth = atof(argv[6]);
                 if (argc > 7) {
                     amplitudeMultiplier = atof(argv[7]);
                     amplitudeSweepTo = amplitudeMultiplier;
                 }
                 if (argc > 8) amplitudeSweepTo = atof(argv[8]);

                 if (argc > 9) {
                     //  ignore any additional arguments, but print a warning

                     printf("More than 8 arguments provided; ignoring.\n");

                 }

                 if (abs(sweepStepWidth) < 1E-20) {
                     isContinuous = -1;
                     sweepStepWidth = 0.;
                 } else {
                     isContinuous = 0;

                     // *** TEMPORARY: ABORT (not implemented yet)
                     printf("Stepped convergence percentages not implemented yet.\n");
                     printf("Aborting.\n");
                     return;

                 }

                 break;

        case 1:  // test: sine
        case 2:  // test: saw
        case 3:  // test: square

                 // set default values:
                 testFLeft     = 1000.; // frequency of the left channel
                 testFRight    = 1200.;
                 testLength    =    5.; // length of the sample in seconds
                 testAmplitude = 5000.; // amplitude of the sample (0..32766)

                 // read command line arguments, if present:
                 if (argc > 2) testFLeft = atof(argv[2]);
                 if (argc > 3) testFRight = atof(argv[3]);
                 if (argc > 4) testLength = atof(argv[4]);
                 if (argc > 5) testAmplitude = atof(argv[5]);

                 if (argc > 6) {
                     //  ignore any additional arguments, but print a warning

                     printf("More than 5 arguments provided; ignoring.\n");

                 }

                 break;

        default: // huh?

                 printf("Unknown outputMode=%d\n", outputMode);
                 printf("Aborting.\n");

                 return;

    }

// command line parameters parsing finished.