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hdjd
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Now relays controller events to a virtual midi device

This commit is contained in:
Neale Pickett 2013-04-15 23:38:15 -06:00
parent dcaa85e4bb
commit d118941b59
2 changed files with 71 additions and 14 deletions
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3
Makefile
View File

@ -2,7 +2,8 @@ all: hdjd aac123
hdjd: CFLAGS += $(shell pkg-config --cflags libusb-1.0) hdjd: CFLAGS += $(shell pkg-config --cflags libusb-1.0)
hdjd: LDFLAGS += $(shell pkg-config --libs libusb-1.0) hdjd: LDFLAGS += $(shell pkg-config --libs libusb-1.0)
hdjd: CFLAGS += $(shell pkg-config --cflags alsa)
hdjd: LDFLAGS += $(shell pkg-config --libs alsa)
aac123: CFLAGS += $(shell pkg-config --cflags alsa) aac123: CFLAGS += $(shell pkg-config --cflags alsa)
aac123: LDLIBS += $(shell pkg-config --libs alsa) aac123: LDLIBS += $(shell pkg-config --libs alsa)

82
hdjd.c
View File

@ -1,6 +1,7 @@
#include <stdio.h> #include <stdio.h>
#include <stdint.h> #include <stdint.h>
#include <libusb.h> #include <libusb.h>
#include <alsa/asoundlib.h>
/* /*
* Some things I use for debugging * Some things I use for debugging
@ -17,46 +18,101 @@
#define DUMP_c(v) DUMPf("%s = '%c' (0x%02x)", #v, v, v) #define DUMP_c(v) DUMPf("%s = '%c' (0x%02x)", #v, v, v)
#define DUMP_p(v) DUMPf("%s = %p", #v, v) #define DUMP_p(v) DUMPf("%s = %p", #v, v)
// Steel: 0xb102, 0x83, 0x03 struct device {
// MP3e2: 0x0b105, 0x82, uint16_t product_id;
// 4set: 0xb10c, 0x84, 0x02 uint8_t ep_in;
uint8_t ep_out;
};
const struct device devices[] = {
{ 0xb102, 0x83, 0x04 },
{ 0xb105, 0x82, 0x03 },
{ 0, 0, 0 }
};
int int
main(int argc, char **argv) main(int argc, char **argv)
{ {
struct libusb_device_handle *handle; static snd_seq_t *handle;
struct libusb_device_handle *dev;
struct libusb_device_descriptor ddesc;
char name[100];
const struct device *d;
snd_midi_event_t *midi_event_parser;
int seq_port;
int ret; int ret;
if (libusb_init(NULL) < 0) { if (libusb_init(NULL) < 0) {
return 69; return 69;
} }
handle = libusb_open_device_with_vid_pid(NULL, 0x06f8, 0xb102); for (d = devices; d->product_id; d += 1) {
if (!handle) { dev = libusb_open_device_with_vid_pid(NULL, 0x6f8, d->product_id);
if (dev) {
break;
}
}
if (!dev) {
printf("Couldn't find a controller\n"); printf("Couldn't find a controller\n");
return 69; return 69;
} }
// Figure out what this thing is called
libusb_get_device_descriptor(libusb_get_device(dev), &ddesc);
{
char *p = name;
ret = libusb_get_string_descriptor_ascii(dev, ddesc.iManufacturer, name, sizeof(name));
if (ret > 0) {
p = name + ret;
*p = ' ';
p += 1;
ret = libusb_get_string_descriptor_ascii(dev, ddesc.iProduct, p, sizeof(name) - ret - 1);
}
if (ret < 0) {
printf("Can't figure out what to call this thing.\n");
return 69;
}
}
printf("Opened a %s\n", name);
if (snd_seq_open(&handle, "default", SND_SEQ_OPEN_DUPLEX, 0) < 0) {
perror("snd_seq_open");
return(69);
}
snd_seq_nonblock(handle, 1);
snd_seq_set_client_name(handle, name);
seq_port = snd_seq_create_simple_port(handle, name,
SND_SEQ_PORT_CAP_READ |
SND_SEQ_PORT_CAP_WRITE |
SND_SEQ_PORT_CAP_SUBS_READ |
SND_SEQ_PORT_CAP_SUBS_WRITE,
SND_SEQ_PORT_TYPE_MIDI_GENERIC);
snd_midi_event_new(256, &midi_event_parser);
while (1) { while (1) {
uint8_t data[80]; uint8_t data[80];
int transferred; int transferred;
int i; int i;
snd_seq_event_t ev;
if ((ret = libusb_bulk_transfer(handle, 0x83, data, sizeof data, &transferred, 0))) { if ((ret = libusb_bulk_transfer(dev, 0x83, data, sizeof data, &transferred, 0))) {
break; break;
} }
for (i = 0; i < transferred; i += 1) { for (i = 0; i < transferred; i += 1) {
printf("%02x ", data[i]); printf("%02x ", data[i]);
} }
snd_midi_event_encode(midi_event_parser, data, transferred, &ev);
snd_seq_ev_set_direct(&ev);
snd_seq_ev_set_source(&ev, seq_port);
snd_seq_ev_set_subs(&ev);
snd_seq_event_output(handle, &ev);
printf("\n"); printf("\n");
snd_seq_drain_output(handle);
// Cram it back out, to turn that light on
if ((ret = libusb_bulk_transfer(handle, 0x04, data, transferred, &transferred, 0))) {
break;
}
} }
if (ret < 0) { if (ret < 0) {