cliconnect.c

/*
Copyright (c) 2015 Harry van Haaren <harryhaaren@gmail.com

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to
deal in the Software without restriction, including without limitation the
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
IN THE SOFTWARE.
*/


#include <string.h>
#include <stdlib.h>
#include <ncurses.h>
#include <jack/jack.h>

jack_client_t* client;
const char** ports = 0;
const char** portsOut = 0;
int n_ports = 0;
int n_out_ports = 0;

int line = 0;
int rescanPorts = 0;

void show_connections(const char* type)
{
    char* t = 0;
    if( strcmp( JACK_DEFAULT_AUDIO_TYPE, type ) == 0 )
        t = "Audio";
    else
        t = "MIDI";
    mvprintw(line++, 0, "JACK %s Connections:\n", t);

    for(int i = 0; ports[i] != 0; i++ ) {
        jack_port_t *p = jack_port_by_name(client, ports[i]);
        if( !strcmp(type, jack_port_type(p) ) == 0 ) {
            continue;
        }
        const char** connect = jack_port_get_all_connections( client, p );

        if( connect ) {
            for(int o = 0; connect[o] != 0; o++) {
                mvprintw(line++, 0, "%s -> %s\n", connect[o], ports[i]);
                //mvprintw(30, 10, "connected %s -> %s\n", connect[o], ports[i] );
            }
            jack_free(connect);
        }
    }
}

/**
 * Display list of ports
 * type       - jack type of ports to list
 * sel        - 2 element array of selected ports
 * active_col - which column is active (0 left, 1 right)
 */
void list_ports(const char* type, int* sel, int active_col)
{
    int left  = 20;
    if( line > 18 )
        left = line + 2;
    int arrow = left;
    int right = 20;
    for(int i = 0; portsOut[i] != 0; i++ ) {
        jack_port_t *p = jack_port_by_name(client, portsOut[i]);
        int active_port = i == sel[0] && active_col == 0;
        if(active_port)
            attron(A_BOLD);
        mvprintw(left , 0, "   %s", portsOut[i]);
        attroff(A_BOLD);
        mvprintw(arrow+sel[0], 0, "=>");
        left++;
    }
    left = arrow;
    for(int i = 0; ports[i] != 0; i++ ) {
        jack_port_t *p = jack_port_by_name(client, ports[i]);
        int active_port = i == sel[1] && active_col == 1;
        if(active_port)
            attron(A_BOLD);
        mvprintw(left , 30, "   %s", ports[i]);
        attroff(A_BOLD);
        mvprintw(arrow+sel[1], 30, "=>");
        left++;
    }
}

void portRegCallback(jack_port_id_t port, int reg, void *arg)
{
	mvprintw(0,0,"Port reg callback()\n");
	rescanPorts = 1;
}
int graphOrderCallback(void *arg)
{
	mvprintw(0,0,"Graph ReOrder callback()\n");
	rescanPorts = 1;
}

int main()
{
    client = jack_client_open("CliConnect",
                              JackNoStartServer, 0 );
    if( !client ) {
        printf("JACK not running - exit.\n");
        exit(0);
    }

    int ret = jack_set_graph_order_callback(client, graphOrderCallback, 0);
    if( ret )
    {
	    printf("error setting graph order cb\n");
    }
    ret = jack_set_port_registration_callback(client, portRegCallback, 0);
    if( ret )
    {
	    printf("error setting port registration cb\n");
    }

    ports = jack_get_ports( client, 0, 0, JackPortIsInput );
    for(n_ports = 0; ports[n_ports] != 0; n_ports++) {}
    portsOut = jack_get_ports( client, 0, 0, JackPortIsOutput );
    for(n_out_ports = 0; portsOut[n_out_ports] != 0; n_out_ports++) {}


    // Start the UI
    initscr();
    clear();
    noecho();
    curs_set(0);
    cbreak();
    // 2 part array, selection left, selection right
    int  selected[2];
    memset(selected, 0, sizeof(int)*2);
    bool onRight = 0;

    int row, col;
    getmaxyx( stdscr, row, col );
    int row_old, col_old;

    while(1) {
        getmaxyx( stdscr, row, col );
        if(row != row_old || col != col_old) {
            row_old = row;
            col_old = col;
            clear();
        }
        refresh();

        line = 0;
        show_connections( JACK_DEFAULT_AUDIO_TYPE );
        line++;
        show_connections( JACK_DEFAULT_MIDI_TYPE );
        line++;
        list_ports(JACK_DEFAULT_AUDIO_TYPE, selected, onRight);
        refresh();

        char c = getch();
        if( c == 'q' || c == 'Q' )
            break;
        if( c == 'j' ) {
            if( onRight ) { // input / writeable / ports
                selected[onRight]++;
                if( selected[onRight] >= n_ports )
                    selected[onRight] = 0;
            } else {
                selected[onRight]++;
                if( selected[onRight] >= n_out_ports )
                    selected[onRight] = 0;
            }
        }
        if( c == 'k' ) {
            if(onRight) {
                selected[onRight]--;
                if( selected[onRight] < 0 )
                    selected[onRight] = n_ports-1;
            } else {
                selected[onRight]--;
                if( selected[onRight] < 0 )
                    selected[onRight] = n_out_ports-1;
            }
        }
        if( c == 'l' )
            onRight = true;
        if( c == 'h' )
            onRight = false;

        if( c == ' ' ) {
            int r = jack_connect( client, portsOut[selected[0]],
                                  ports[selected[1]] );
            if( r )
                jack_disconnect( client, portsOut[selected[0]],
                                 ports[selected[1]] );
            clear();
        }

        if( c == 'r' || rescanPorts ) {
            jack_free( ports );
            jack_free( portsOut );
            ports = jack_get_ports( client, 0, 0, JackPortIsInput );
            portsOut = jack_get_ports( client, 0, 0, JackPortIsOutput );
            for(n_ports = 0; ports[n_ports] != 0; n_ports++) {}
            for(n_out_ports = 0; ports[n_out_ports] != 0; n_out_ports++) {}
            clear();
        }
    }

    endwin();

    jack_free( ports );
    jack_free( portsOut );
    jack_client_close( client );
    return 0;
}