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364 lines
9.1 KiB
C
364 lines
9.1 KiB
C
/*****************************************************************************
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envy24control.c - Env24 chipset (ICE1712) control utility
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midi controller code
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(c) 2004, 2005 by Dirk Jagdmann <doj@cubic.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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******************************************************************************/
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#include <string.h>
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#include <alsa/asoundlib.h>
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#include "midi.h"
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#include <gtk/gtk.h>
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#include <stdint.h>
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static const int midi2slider_lin[128] = {
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96, 96, 95, 94, 93, 93, 92, 91,
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90, 90, 89, 88, 87, 87, 86, 85,
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84, 84, 83, 82, 81, 81, 80, 79,
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78, 78, 77, 76, 75, 75, 74, 73,
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72, 72, 71, 70, 69, 69, 68, 67,
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66, 66, 65, 64, 63, 62, 62, 61,
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60, 59, 59, 58, 57, 56, 56, 55,
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54, 53, 53, 52, 51, 50, 50, 49,
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48, 47, 47, 46, 45, 44, 44, 43,
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42, 41, 41, 40, 39, 38, 38, 37,
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36, 35, 35, 34, 33, 32, 31, 31,
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30, 29, 28, 28, 27, 26, 25, 25,
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24, 23, 22, 22, 21, 20, 19, 19,
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18, 17, 16, 16, 15, 14, 13, 13,
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12, 11, 10, 10, 9, 8, 7, 7,
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6, 5, 4, 4, 3, 2, 1, 0,
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};
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static const int slider2midi_lin[97] = {
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0, 1, 2, 3, 5, 6, 7, 9,
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10, 11, 13, 14, 15, 17, 18, 19,
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21, 22, 23, 25, 26, 27, 29, 30,
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31, 33, 34, 35, 37, 38, 39, 41,
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42, 43, 44, 46, 47, 48, 50, 51,
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52, 54, 55, 56, 58, 59, 60, 62,
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63, 64, 66, 67, 68, 70, 71, 72,
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74, 75, 76, 78, 79, 80, 82, 83,
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84, 85, 87, 88, 89, 91, 92, 93,
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95, 96, 97, 99, 100, 101, 103, 104,
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105, 107, 108, 109, 111, 112, 113, 115,
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116, 117, 119, 120, 121, 123, 124, 125,
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127,
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};
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static const int midi2slider_enh[128] = {
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96, 95, 94, 93, 91, 90, 89, 87,
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86, 85, 83, 82, 81, 79, 78, 77,
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75, 74, 73, 72, 70, 69, 68, 66,
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65, 64, 62, 61, 60, 58, 57, 56,
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54, 53, 52, 51, 49, 48, 47, 45,
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44, 43, 41, 40, 39, 37, 36, 35,
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33, 32, 31, 30, 28, 27, 26, 24,
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23, 22, 20, 19, 18, 16, 15, 14,
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12, 12, 12, 12, 12, 11, 11, 11,
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11, 11, 10, 10, 10, 10, 10, 9,
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9, 9, 9, 9, 8, 8, 8, 8,
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8, 7, 7, 7, 7, 7, 6, 6,
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6, 6, 6, 5, 5, 5, 5, 5,
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4, 4, 4, 4, 4, 3, 3, 3,
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3, 3, 2, 2, 2, 2, 2, 1,
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1, 1, 1, 1, 0, 0, 0, 0,
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};
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static const int slider2midi_enh[97] = {
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0, 1, 2, 3, 4, 4, 5, 6,
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7, 7, 8, 9, 10, 10, 11, 12,
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13, 13, 14, 15, 16, 16, 17, 18,
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19, 20, 20, 21, 22, 23, 23, 24,
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25, 26, 26, 27, 28, 29, 29, 30,
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31, 32, 32, 33, 34, 35, 36, 36,
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37, 38, 39, 39, 40, 41, 42, 42,
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43, 44, 45, 45, 46, 47, 48, 48,
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49, 50, 51, 52, 52, 53, 54, 55,
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55, 56, 57, 58, 58, 59, 60, 61,
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61, 62, 63, 68, 68, 73, 78, 83,
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88, 93, 98, 103, 108, 113, 118, 123,
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127,
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};
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static const int *midi2slider, *slider2midi;
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static snd_seq_t *seq=0;
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static int client, clientId, port, ch;
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static char *portname=0, *appname=0;
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static int maxstreams=0;
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static int currentvalue[128];
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void midi_maxstreams(int m)
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{
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maxstreams=m*2;
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}
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int midi_close()
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{
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int i=0;
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if(seq)
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i=snd_seq_close(seq);
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seq=0;
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client=port=0;
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if(portname)
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free(portname), portname=0;
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if(appname)
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free(appname), appname=0;
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return i;
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}
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static void do_controller(int c, int v)
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{
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snd_seq_event_t ev;
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if(!seq) return;
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if(currentvalue[c]==v) return;
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#if 0
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fprintf(stderr, "do_controller(%i,%i)\n",c,v);
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#endif
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snd_seq_ev_clear(&ev);
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snd_seq_ev_set_source(&ev, port);
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snd_seq_ev_set_subs(&ev);
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snd_seq_ev_set_direct(&ev);
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snd_seq_ev_set_controller(&ev,ch,c,v);
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snd_seq_event_output(seq, &ev);
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snd_seq_drain_output(seq);
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currentvalue[c]=v;
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}
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int midi_controller(int c, int v)
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{
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int v2;
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if (! seq)
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return 0;
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if(c<0 || c>127) return 0;
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if(v<0) v=0;
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else if(v>96) v=96;
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v2=slider2midi[v];
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#if 0
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fprintf(stderr, "midi_controller(%i,%i)->%i\n",c,v,v2);
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#endif
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do_controller(c,v2);
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return 0;
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}
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int midi_button(int b, int v)
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{
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if(b<0) return 0;
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b+=maxstreams;
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if(b>127) return 0;
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do_controller(b, v?127:0);
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return 0;
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}
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int midi_init(char *appname, int channel, int midi_enhanced)
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{
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snd_seq_client_info_t *clientinfo;
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int npfd;
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struct pollfd *pfd;
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if(seq)
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return 0;
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for(npfd=0; npfd!=128; ++npfd)
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currentvalue[npfd]=-1;
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ch=channel;
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if(midi_enhanced)
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{
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midi2slider=midi2slider_enh;
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slider2midi=slider2midi_enh;
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}
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else
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{
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midi2slider=midi2slider_lin;
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slider2midi=slider2midi_lin;
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}
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if(snd_seq_open(&seq, "default", SND_SEQ_OPEN_DUPLEX, SND_SEQ_NONBLOCK) < 0)
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{
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g_warning("could not init ALSA sequencer\n");
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seq=0;
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return -1;
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}
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snd_seq_set_client_name(seq, appname);
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snd_seq_client_info_alloca(&clientinfo);
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snd_seq_get_client_info (seq, clientinfo);
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client=snd_seq_client_info_get_client(clientinfo);
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clientId = snd_seq_client_id(seq);
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portname=g_strdup_printf("%s Mixer Control", appname);
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port=snd_seq_create_simple_port(seq, portname,
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SND_SEQ_PORT_CAP_WRITE|SND_SEQ_PORT_CAP_SUBS_WRITE|SND_SEQ_PORT_CAP_READ|SND_SEQ_PORT_CAP_SUBS_READ,
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SND_SEQ_PORT_TYPE_APPLICATION);
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if(port < 0)
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{
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g_warning("could not create ALSA sequencer port\n");
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midi_close();
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return -1;
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}
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npfd=snd_seq_poll_descriptors_count(seq, POLLIN);
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if(npfd<=0)
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{
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g_warning("could not get number of ALSA sequencer poll descriptors\n");
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midi_close();
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return -1;
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}
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pfd=(struct pollfd*)alloca(npfd * sizeof(struct pollfd));
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if(pfd==0)
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{
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g_warning("could not alloc memory for ALSA sequencer poll descriptors\n");
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midi_close();
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return -1;
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}
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if(snd_seq_poll_descriptors(seq, pfd, npfd, POLLIN) != npfd)
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{
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g_warning("number of returned poll desc is not equal of request poll desc\n");
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midi_close();
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return -1;
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}
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return pfd[0].fd;
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}
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void mixer_adjust(GtkAdjustment *adj, gpointer data);
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void mixer_set_mute(int stream, int left, int right);
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void midi_process(gpointer data, gint source, GdkInputCondition condition)
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{
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snd_seq_event_t *ev;
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static GtkAdjustment *adj=0;
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if(!adj)
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adj=(GtkAdjustment*) gtk_adjustment_new(0, 0, 96, 1, 1, 10);
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do
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{
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snd_seq_event_input(seq, &ev);
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if(!ev) continue;
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switch(ev->type)
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{
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case SND_SEQ_EVENT_CONTROLLER:
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#if 0
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fprintf(stderr, "Channel %02d: Controller %03d: Value:%d\n",
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ev->data.control.channel, ev->data.control.param, ev->data.control.value);
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#endif
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if(ev->data.control.channel == ch)
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{
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currentvalue[ev->data.control.param]=ev->data.control.value;
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if(ev->data.control.param < maxstreams)
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{
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int stream=ev->data.control.param;
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long data=((stream/2+1)<<16)|(stream&1);
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gtk_adjustment_set_value(adj, midi2slider[ev->data.control.value]);
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mixer_adjust(adj, (gpointer)data);
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}
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else if(ev->data.control.param < maxstreams*2)
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{
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int b=ev->data.control.param-maxstreams;
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int left=-1, right=-1;
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if(b&1)
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right=ev->data.control.value;
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else
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left=ev->data.control.value;
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mixer_set_mute(b/2+1, left, right);
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}
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}
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break;
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case SND_SEQ_EVENT_PORT_SUBSCRIBED:
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#if 0
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fprintf(stderr, "event subscribed send.client:%i dest.client:%i clientId:%i\n",
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(int)ev->data.connect.sender.client, (int)ev->data.connect.dest.client, clientId);
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#endif
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if(ev->data.connect.dest.client!=clientId)
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{
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int i;
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for(i=0; i!=128; ++i)
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if(currentvalue[i] >= 0)
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{
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/* set currentvalue[i] to a fake value, so the check in do_controller does not trigger */
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int v=currentvalue[i];
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currentvalue[i]=-1;
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do_controller(i, v);
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}
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}
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break;
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}
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snd_seq_free_event(ev);
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}
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while (snd_seq_event_input_pending(seq, 0) > 0);
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}
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/* ************************************************* */
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/* C++ code to help calculating midi<->slider tables */
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#if 0
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#include <iostream>
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#include <map>
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#include <vector>
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using namespace std;
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int main()
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{
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int i;
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int midi2slider[128];
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///// your midi to slider conversion should be calculated here
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for(i=0; i<64; ++i)
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midi2slider[i]=(i*84)/64;
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for(i=0; i<64; ++i)
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midi2slider[i+64]=(i*13)/64+84;
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///// end of your calculation
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// print map
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map<int,int> m;
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int z=-1;
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cout << "static const int midi2slider_enh[128] = {" << endl;
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for(i=0; i<128; ++i)
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{
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int v=96-midi2slider[i];
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cout << v << ", ";
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if(((++z)%8)==7)
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cout << endl;
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m[v]=z;
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}
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cout << "};" << endl;
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// now generate the reverse map
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vector<int> rm;
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cout << "static const int slider2midi_enh[97] = {" << endl;
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int last=0;
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for(i=0; i<97; ++i)
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{
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int v=m[i];
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if(v==0) v=last;
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last=v;
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rm.push_back(v);
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}
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z=-1;
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for(i=96; i>=0; --i)
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{
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cout << rm[i] << ", ";
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if(((++z)%8)==7)
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cout << endl;
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}
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cout << "};" << endl;
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return 0;
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}
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#endif
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