jack2/common/JackServerGlobals.cpp

/*
Copyright (C) 2005 Grame

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifdef WIN32
#pragma warning (disable : 4786)
#endif

#include "JackServerGlobals.h"
#include "JackTools.h"
#include "shm.h"
#include <getopt.h>
#include <stdio.h>
#include <errno.h>

static char* server_name = NULL;

namespace Jack
{

unsigned int JackServerGlobals::fClientCount = 0;
JackServer* JackServerGlobals::fServer = NULL;

int JackServerGlobals::Start(const char* server_name,
                             jack_driver_desc_t* driver_desc,
                             JSList* driver_params,
                             int sync,
                             int temporary,
                             int time_out_ms,
                             int rt,
                             int priority,
                             int loopback,
                             int verbose)
{
    jack_log("Jackdmp: sync = %ld timeout = %ld rt = %ld priority = %ld verbose = %ld ", sync, time_out_ms, rt, priority, verbose);
    fServer = new JackServer(sync, temporary, time_out_ms, rt, priority, loopback, verbose, server_name);
    int res = fServer->Open(driver_desc, driver_params);
    return (res < 0) ? res : fServer->Start();
}

int JackServerGlobals::Stop()
{
    fServer->Stop();
    fServer->Close();
    jack_log("Jackdmp: server close");
    delete fServer;
    jack_log("Jackdmp: delete server");
    return 0;
}

int JackServerGlobals::Delete()
{
    delete fServer;
    jack_log("Jackdmp: delete server");
    return 0;
}

bool JackServerGlobals::Init()
{
    // Server already started
    if (JackServer::fInstance != NULL) 
        return true;
        
    // Otherwise first client starts the server
    if (fClientCount++ == 0) {

        jack_log("JackServerGlobals Init");
        int realtime = 0;
        int client_timeout = 0; /* msecs; if zero, use period size. */
        int realtime_priority = 10;
        int verbose_aux = 0;
        int do_mlock = 1;
        unsigned int port_max = 128;
        int loopback = 0;
        int do_unlock = 0;
        int temporary = 0;

        jack_driver_desc_t* driver_desc;
        const char *options = "-ad:P:uvshVRL:STFl:t:mn:p:";
        static struct option long_options[] = {
                                                  { "driver", 1, 0, 'd'
                                                  },
                                                  { "verbose", 0, 0, 'v' },
                                                  { "help", 0, 0, 'h' },
                                                  { "port-max", 1, 0, 'p' },
                                                  { "no-mlock", 0, 0, 'm' },
                                                  { "name", 0, 0, 'n' },
                                                  { "unlock", 0, 0, 'u' },
                                                  { "realtime", 0, 0, 'R' },
                                                  { "loopback", 0, 0, 'L' },
                                                  { "realtime-priority", 1, 0, 'P' },
                                                  { "timeout", 1, 0, 't' },
                                                  { "temporary", 0, 0, 'T' },
                                                  { "version", 0, 0, 'V' },
                                                  { "silent", 0, 0, 's' },
                                                  { "sync", 0, 0, 'S' },
                                                  { 0, 0, 0, 0 }
                                              };
        int opt = 0;
        int option_index = 0;
        int seen_driver = 0;
        char *driver_name = NULL;
        char **driver_args = NULL;
        JSList* driver_params;
        int driver_nargs = 1;
        JSList* drivers = NULL;
        int show_version = 0;
        int sync = 0;
        int rc, i;
        int ret;

        FILE* fp = 0;
        char filename[255];
        char buffer[255];
        int argc = 0;
        char* argv[32];

        snprintf(filename, 255, "%s/.jackdrc", getenv("HOME"));
        fp = fopen(filename, "r");

        if (!fp) {
            fp = fopen("/etc/jackdrc", "r");
        }
        // if still not found, check old config name for backwards compatability
        if (!fp) {
            fp = fopen("/etc/jackd.conf", "r");
        }

        argc = 0;
        if (fp) {
            ret = fscanf(fp, "%s", buffer);
            while (ret != 0 && ret != EOF) {
                argv[argc] = (char*)malloc(64);
                strcpy(argv[argc], buffer);
                ret = fscanf(fp, "%s", buffer);
                argc++;
            }
            fclose(fp);
        }

        /*
        For testing
        int argc = 15;
        char* argv[] = {"jackdmp", "-R", "-v", "-d", "coreaudio", "-p", "512", "-d", "~:Aggregate:0", "-r", "48000", "-i", "2", "-o", "2" };
        */

        opterr = 0;
        optind = 1; // Important : to reset argv parsing

        while (!seen_driver &&
                (opt = getopt_long(argc, argv, options, long_options, &option_index)) != EOF) {

            switch (opt) {

                case 'd':
                    seen_driver = 1;
                    driver_name = optarg;
                    break;

                case 'v':
                    verbose_aux = 1;
                    break;

                case 'S':
                    sync = 1;
                    break;

                case 'n':
                    server_name = optarg;
                    break;

                case 'm':
                    do_mlock = 0;
                    break;

                case 'p':
                    port_max = (unsigned int)atol(optarg);
                    break;

                case 'P':
                    realtime_priority = atoi(optarg);
                    break;

                case 'R':
                    realtime = 1;
                    break;

                case 'L':
                    loopback = atoi(optarg);
                    break;

                case 'T':
                    temporary = 1;
                    break;

                case 't':
                    client_timeout = atoi(optarg);
                    break;

                case 'u':
                    do_unlock = 1;
                    break;

                case 'V':
                    show_version = 1;
                    break;

                default:
                    jack_error("unknown option character %c", optopt);
                    break;
            }
        }

        drivers = jack_drivers_load(drivers);
        if (!drivers) {
            jack_error("jackdmp: no drivers found; exiting");
            goto error;
        }

        driver_desc = jack_find_driver_descriptor(drivers, driver_name);
        if (!driver_desc) {
            jack_error("jackdmp: unknown driver '%s'", driver_name);
            goto error;
        }

        if (optind < argc) {
            driver_nargs = 1 + argc - optind;
        } else {
            driver_nargs = 1;
        }

        if (driver_nargs == 0) {
            jack_error("No driver specified ... hmm. JACK won't do"
                       " anything when run like this.");
            goto error;
        }

        driver_args = (char**)malloc(sizeof(char*) * driver_nargs);
        driver_args[0] = driver_name;

        for (i = 1; i < driver_nargs; i++) {
            driver_args[i] = argv[optind++];
        }

        if (jack_parse_driver_params(driver_desc, driver_nargs, driver_args, &driver_params)) {
            goto error;
        }

#ifndef WIN32
        if (server_name == NULL)
            server_name = (char*)JackTools::DefaultServerName();
#endif

        rc = jack_register_server(server_name, false);
        switch (rc) {
            case EEXIST:
                jack_error("`%s' server already active", server_name);
                goto error;
            case ENOSPC:
                jack_error("too many servers already active");
                goto error;
            case ENOMEM:
                jack_error("no access to shm registry");
                goto error;
            default:
                jack_info("server `%s' registered", server_name);
        }

        /* clean up shared memory and files from any previous instance of this server name */
        jack_cleanup_shm();
        JackTools::CleanupFiles(server_name);

        if (!realtime && client_timeout == 0)
            client_timeout = 500; /* 0.5 sec; usable when non realtime. */

        for (i = 0; i < argc; i++) {
            free(argv[i]);
        }

        int res = Start(server_name, driver_desc, driver_params, sync, temporary, client_timeout, realtime, realtime_priority, loopback, verbose_aux);
        if (res < 0) {
            jack_error("Cannot start server... exit");
            Delete();
            jack_cleanup_shm();
            JackTools::CleanupFiles(server_name);
            jack_unregister_server(server_name);
            goto error;
        }
    }

    return true;

error:
    fClientCount--;
    return false;
}

void JackServerGlobals::Destroy()
{
    if (--fClientCount == 0) {
        jack_log("JackServerGlobals Destroy");
        Stop();
        jack_cleanup_shm();
        JackTools::CleanupFiles(server_name);
        jack_unregister_server(server_name);
    }
}

} // end of namespace