omxplayer-controll/lib/omxp_spawn.js

Raspberry Pi omxplayer controll using dbus-native

var spawn = require('child_process').spawn,
    execSync = require('child_process').execSync,
    events = require('events'),
    eventEmitter = new events.EventEmitter();
module.exports = eventEmitter;

var omxp_running = function() {
    var stdout = execSync('ps xa | grep "[o]mxplayer.bin" | wc -l');
    var processCount = parseInt(stdout);
    return processCount;
};
var prevent_kill_signal = false;
module.exports.player = function(path, options) {
    var count = omxp_running();
    options.maxPlayerAllowCount = options.maxPlayerAllowCount || 1;
    options.closeOtherPlayers = typeof options.closeOtherPlayers === 'undefined' ? true : options.closeOtherPlayers;
    if (count >= options.maxPlayerAllowCount) {
        if (options.closeOtherPlayers) {
            prevent_kill_signal = true;
            execSync('killall -9 omxplayer.bin'); //Kill all previous omxplayers
        } else {
            return;
        }
    }
    var settings = options || {};
    var command = 'omxplayer';
    path = typeof path === 'string' ? [path] : path;
    var args = path;
    if (['hdmi', 'local', 'both'].indexOf(settings.audioOutput) != -1)
        args.push('-o', settings.audioOutput);
    if (settings.blackBackground !== false)
        args.push('-b');
    if (settings.disableKeys === true)
        args.push('--no-keys');
    if (settings.disableOnScreenDisplay === true)
        args.push('--no-osd');
    if (settings.disableGhostbox === true)
        args.push('--no-ghost-box');
    if (settings.subtitlePath && settings.subtitlePath !== '')
        args.push('--subtitles', '"' + settings.subtitlePath + '"');
    if (settings.startAt)
        args.push('--pos', '' + settings.startAt + '');
    if (typeof settings.startVolume !== 'undefined') {
        if (settings.startVolume >= 0.0 && settings.startVolume <= 1.0) {
            args.push('--vol');
            var db = settings.startVolume > 0 ? Math.round(100 * 20 * (Math.log(settings.startVolume) / Math.log(10))) / 1 : -12000000;
            args.push(db);
        }
    }
    if (typeof settings.otherArgs !== 'undefined' && settings.otherArgs.constructor === Array) {
        args = args.concat(settings.otherArgs);
    }
    if (settings.nativeLoop === true) {
        args.push('--loop');
    }

    args.push('--dbus_name');
    args.push('org.mpris.MediaPlayer2.omxplayer');
    args.push('< omxpipe');
    var omxspawn = spawn(command, args);
    omxspawn.on('exit', function() {
        eventEmitter.emit('finish', !prevent_kill_signal);
    });
};

module.exports.omxp_running = omxp_running;