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envy24control: enhanced mapping of midi controller

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From: Dirk Jagdmann <doj@cubic.org>

Hello,

this patch adds a command line option to select a better mapping from
midi controller values to dB sliders. The default stays as a linear
mapping, which has the disadvantage, that a sensible area to adjust your
volume (which ist mostly in the range of 0..-12dB) is in the upper
1/10th of your midi controller. This patch adds a map, which consists of
two linear functions, so that the upper half of your midi controller
controls values from 0..-12dB, the lower half then controls -13..-96dB.
This commit is contained in:
Takashi Iwai 2005-08-03 13:52:13 +00:00
parent 7fcbc9917e
commit 603e129bc5
4 changed files with 153 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

149
envy24control/midi.c
View file

@ -24,6 +24,75 @@
#include <gtk/gtk.h>
#include <stdint.h>
static const int midi2slider_lin[128] = {
96, 96, 95, 94, 93, 93, 92, 91,
90, 90, 89, 88, 87, 87, 86, 85,
84, 84, 83, 82, 81, 81, 80, 79,
78, 78, 77, 76, 75, 75, 74, 73,
72, 72, 71, 70, 69, 69, 68, 67,
66, 66, 65, 64, 63, 62, 62, 61,
60, 59, 59, 58, 57, 56, 56, 55,
54, 53, 53, 52, 51, 50, 50, 49,
48, 47, 47, 46, 45, 44, 44, 43,
42, 41, 41, 40, 39, 38, 38, 37,
36, 35, 35, 34, 33, 32, 31, 31,
30, 29, 28, 28, 27, 26, 25, 25,
24, 23, 22, 22, 21, 20, 19, 19,
18, 17, 16, 16, 15, 14, 13, 13,
12, 11, 10, 10, 9, 8, 7, 7,
6, 5, 4, 4, 3, 2, 1, 0,
};
static const int slider2midi_lin[97] = {
0, 1, 2, 3, 5, 6, 7, 9,
10, 11, 13, 14, 15, 17, 18, 19,
21, 22, 23, 25, 26, 27, 29, 30,
31, 33, 34, 35, 37, 38, 39, 41,
42, 43, 44, 46, 47, 48, 50, 51,
52, 54, 55, 56, 58, 59, 60, 62,
63, 64, 66, 67, 68, 70, 71, 72,
74, 75, 76, 78, 79, 80, 82, 83,
84, 85, 87, 88, 89, 91, 92, 93,
95, 96, 97, 99, 100, 101, 103, 104,
105, 107, 108, 109, 111, 112, 113, 115,
116, 117, 119, 120, 121, 123, 124, 125,
127,
};
static const int midi2slider_enh[128] = {
96, 95, 94, 93, 91, 90, 89, 87,
86, 85, 83, 82, 81, 79, 78, 77,
75, 74, 73, 72, 70, 69, 68, 66,
65, 64, 62, 61, 60, 58, 57, 56,
54, 53, 52, 51, 49, 48, 47, 45,
44, 43, 41, 40, 39, 37, 36, 35,
33, 32, 31, 30, 28, 27, 26, 24,
23, 22, 20, 19, 18, 16, 15, 14,
12, 12, 12, 12, 12, 11, 11, 11,
11, 11, 10, 10, 10, 10, 10, 9,
9, 9, 9, 9, 8, 8, 8, 8,
8, 7, 7, 7, 7, 7, 6, 6,
6, 6, 6, 5, 5, 5, 5, 5,
4, 4, 4, 4, 4, 3, 3, 3,
3, 3, 2, 2, 2, 2, 2, 1,
1, 1, 1, 1, 0, 0, 0, 0,
};
static const int slider2midi_enh[97] = {
0, 1, 2, 3, 4, 4, 5, 6,
7, 7, 8, 9, 10, 10, 11, 12,
13, 13, 14, 15, 16, 16, 17, 18,
19, 20, 20, 21, 22, 23, 23, 24,
25, 26, 26, 27, 28, 29, 29, 30,
31, 32, 32, 33, 34, 35, 36, 36,
37, 38, 39, 39, 40, 41, 42, 42,
43, 44, 45, 45, 46, 47, 48, 48,
49, 50, 51, 52, 52, 53, 54, 55,
55, 56, 57, 58, 58, 59, 60, 61,
61, 62, 63, 68, 68, 73, 78, 83,
88, 93, 98, 103, 108, 113, 118, 123,
127,
};
static const int *midi2slider, *slider2midi;
static snd_seq_t *seq=0;
static int client, clientId, port, ch;
static char *portname=0, *appname=0;
@ -72,16 +141,16 @@ static void do_controller(int c, int v)
int midi_controller(int c, int v)
{
int v2;
if(c<0 || c>127) return 0;
v*=127; v/=96;
if(v<0) v=0;
if(v>127) v=127;
else if(v>96) v=96;
v2=slider2midi[v];
#if 0
fprintf(stderr, "midi_controller(%i,%i)\n",c,v);
fprintf(stderr, "midi_controller(%i,%i)->%i\n",c,v,v2);
#endif
if(currentvalue[c]==v-1 || currentvalue[c]==v-2) return 0; /* because of 96to127 conversion values can differ up to two integers */
do_controller(c,v);
do_controller(c,v2);
return 0;
}
@ -94,7 +163,7 @@ int midi_button(int b, int v)
return 0;
}
int midi_init(char *appname, int channel)
int midi_init(char *appname, int channel, int midi_enhanced)
{
snd_seq_client_info_t *clientinfo;
int npfd;
@ -107,6 +176,16 @@ int midi_init(char *appname, int channel)
currentvalue[npfd]=-1;
ch=channel;
if(midi_enhanced)
{
midi2slider=midi2slider_enh;
slider2midi=slider2midi_enh;
}
else
{
midi2slider=midi2slider_lin;
slider2midi=slider2midi_lin;
}
if(snd_seq_open(&seq, "default", SND_SEQ_OPEN_DUPLEX, SND_SEQ_NONBLOCK) < 0)
{
@ -185,8 +264,7 @@ void midi_process(gpointer data, gint source, GdkInputCondition condition)
{
int stream=ev->data.control.param;
long data=((stream/2+1)<<16)|(stream&1);
int v=ev->data.control.value; v*=96; v/=127;
gtk_adjustment_set_value(adj, 96-v);
gtk_adjustment_set_value(adj, midi2slider[ev->data.control.value]);
mixer_adjust(adj, (gpointer)data);
}
else if(ev->data.control.param < maxstreams*2)
@ -225,3 +303,58 @@ void midi_process(gpointer data, gint source, GdkInputCondition condition)
}
while (snd_seq_event_input_pending(seq, 0) > 0);
}
/* ************************************************* */
/* C++ code to help calculating midi<->slider tables */
#if 0
#include <iostream>
#include <map>
#include <vector>
using namespace std;
int main()
{
int i;
int midi2slider[128];
///// your midi to slider conversion should be calculated here
for(i=0; i<64; ++i)
midi2slider[i]=(i*84)/64;
for(i=0; i<64; ++i)
midi2slider[i+64]=(i*13)/64+84;
///// end of your calculation
// print map
map<int,int> m;
int z=-1;
cout << "static const int midi2slider_enh[128] = {" << endl;
for(i=0; i<128; ++i)
{
int v=96-midi2slider[i];
cout << v << ", ";
if(((++z)%8)==7)
cout << endl;
m[v]=z;
}
cout << "};" << endl;
// now generate the reverse map
vector<int> rm;
cout << "static const int slider2midi_enh[97] = {" << endl;
int last=0;
for(i=0; i<97; ++i)
{
int v=m[i];
if(v==0) v=last;
last=v;
rm.push_back(v);
}
z=-1;
for(i=96; i>=0; --i)
{
cout << rm[i] << ", ";
if(((++z)%8)==7)
cout << endl;
}
cout << "};" << endl;
return 0;
}
#endif