mirror of https://github.com/nealey/hdjd.git
Make asynchronous
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1928ae286e
commit
f4717adcb4
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@ -0,0 +1,27 @@
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/* obj.h: objecty and exceptiony stuff
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*
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* Some macros to make C a bit more like C++, but without bringing in
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* all of C++'s crapola.
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*/
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#ifndef __OBJ_H__
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#define __OBJ_H__
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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/* Some things I use for debugging */
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#ifdef NODUMP
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# define DUMPf(fmt, args...)
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#else
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# define DUMPf(fmt, args...) fprintf(stderr, "%s:%s:%d " fmt "\n", __FILE__, __FUNCTION__, __LINE__, ##args)
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#endif
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#define DUMP() DUMPf("")
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#define DUMP_d(v) DUMPf("%s = %d", #v, v)
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#define DUMP_x(v) DUMPf("%s = 0x%x", #v, v)
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#define DUMP_s(v) DUMPf("%s = %s", #v, v)
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#define DUMP_c(v) DUMPf("%s = '%c' (0x%02x)", #v, v, v)
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#define DUMP_p(v) DUMPf("%s = %p", #v, v)
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#endif
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106
hdjd.c
106
hdjd.c
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@ -1,7 +1,9 @@
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#include <stdio.h>
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#include <stdint.h>
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#include <libusb.h>
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#include <sys/select.h>
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#include <alsa/asoundlib.h>
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#include "dump.h"
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/*
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* Some things I use for debugging
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@ -25,22 +27,58 @@ struct device {
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};
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const struct device devices[] = {
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{ 0xb102, 0x83, 0x04 },
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{ 0xb105, 0x82, 0x03 },
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{ 0xb102, 0x83, 0x04 }, // Steel
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{ 0xb105, 0x82, 0x03 }, // MP3e2
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{ 0, 0, 0 }
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};
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// Handle to ALSA sequencer
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static snd_seq_t *handle;
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// Descriptor of our fake handle
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int seq_port;
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void
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midi_send(uint8_t *data, size_t datalen)
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{
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snd_seq_event_t ev;
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snd_midi_event_t *midi_event_parser;
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snd_midi_event_new(datalen, &midi_event_parser);
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snd_midi_event_encode(midi_event_parser, data, datalen, &ev);
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snd_seq_ev_set_direct(&ev);
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snd_seq_ev_set_source(&ev, seq_port);
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snd_seq_ev_set_subs(&ev);
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snd_seq_event_output(handle, &ev);
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snd_seq_drain_output(handle);
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snd_midi_event_free(midi_event_parser);
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}
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void
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usb_xfer_done(struct libusb_transfer *transfer)
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{
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uint8_t *data = transfer->buffer;
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int datalen = transfer->actual_length;
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int i;
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for (i = 0; i < datalen; i += 1) {
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printf("%02x ", data[i]);
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}
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printf("\n");
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midi_send(data, datalen);
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}
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int
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main(int argc, char **argv)
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{
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static snd_seq_t *handle;
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struct libusb_device_handle *dev;
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struct libusb_device_descriptor ddesc;
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char name[100];
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const struct device *d;
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snd_midi_event_t *midi_event_parser;
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int seq_port;
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nfds_t nfds = 0;
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int ret;
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if (libusb_init(NULL) < 0) {
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@ -78,6 +116,7 @@ main(int argc, char **argv)
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}
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printf("Opened a %s\n", name);
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// Initialize ALSA
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if (snd_seq_open(&handle, "default", SND_SEQ_OPEN_DUPLEX, 0) < 0) {
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perror("snd_seq_open");
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return(69);
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@ -90,29 +129,64 @@ main(int argc, char **argv)
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SND_SEQ_PORT_CAP_SUBS_READ |
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SND_SEQ_PORT_CAP_SUBS_WRITE,
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SND_SEQ_PORT_TYPE_MIDI_GENERIC);
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snd_midi_event_new(256, &midi_event_parser);
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while (1) {
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struct libusb_transfer *xfer = libusb_alloc_transfer(0);
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uint8_t data[80];
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int transferred;
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int i;
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snd_seq_event_t ev;
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if ((ret = libusb_bulk_transfer(dev, d->ep_in, data, sizeof data, &transferred, 0))) {
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break;
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}
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for (i = 0; i < transferred; i += 1) {
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printf("%02x ", data[i]);
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// Set up transfer
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libusb_fill_bulk_transfer(xfer, dev, d->ep_in, data, sizeof data, usb_xfer_done, NULL, 0);
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libusb_submit_transfer(xfer);
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// Select on our file descriptors
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{
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const struct libusb_pollfd **usb_fds = libusb_get_pollfds(NULL);
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struct timeval tv;
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struct timeval *timeout;
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fd_set rfds, wfds;
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int nfds = 0;
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ret = libusb_get_next_timeout(NULL, &tv);
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if (0 == ret) {
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timeout = NULL;
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} else {
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timeout = &tv;
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}
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FD_ZERO(&rfds);
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FD_ZERO(&wfds);
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for (i = 0; usb_fds[i]; i += 1) {
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const struct libusb_pollfd *ufd = usb_fds[i];
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if (ufd->fd > nfds) {
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nfds = ufd->fd;
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}
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if (ufd->events & POLLIN) {
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FD_SET(ufd->fd, &rfds);
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}
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if (ufd->events & POLLOUT) {
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FD_SET(ufd->fd, &wfds);
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}
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}
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ret = select(nfds + 1, &rfds, &wfds, NULL, timeout);
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for (i = 0; usb_fds[i]; i += 1) {
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int fd = usb_fds[i]->fd;
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if (FD_ISSET(fd, &rfds) || FD_ISSET(fd, &wfds)) {
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libusb_handle_events(NULL);
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}
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}
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}
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snd_midi_event_encode(midi_event_parser, data, transferred, &ev);
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snd_seq_ev_set_direct(&ev);
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snd_seq_ev_set_source(&ev, seq_port);
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snd_seq_ev_set_subs(&ev);
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snd_seq_event_output(handle, &ev);
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printf("\n");
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snd_seq_drain_output(handle);
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libusb_free_transfer(xfer);
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}
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if (ret < 0) {
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