char *mus_midi_describe(void)
{
int i, err;
snd_rawmidi_t *line;
snd_rawmidi_info_t *info;
char *buf = NULL;
char one[256];
snd_rawmidi_info_malloc(&info);
buf = (char *)CALLOC(1024, sizeof(char));
for (i = 0; i < 8; i++)
{
/* presumably this should use the card|device from the info struct, not a blind loop */
err = snd_rawmidi_open(&line, NULL, mus_midi_device_name(i << 16), SND_RAWMIDI_NONBLOCK); /* do the "devices" matter here? */
if (err < 0) continue;
err = snd_rawmidi_info(line, info);
if (err < 0) break;
sprintf(one, "%s: card: %d, device: %d, stream: %d, flags: %x, id: %s, name: %s[%s; %d]\n",
mus_midi_device_name(i << 16),
snd_rawmidi_info_get_card(info), /* card number */
snd_rawmidi_info_get_device(info), /* device number */
snd_rawmidi_info_get_stream(info), /* snd_rawmidi_stream_t */
snd_rawmidi_info_get_flags(info), /* 1=out 2=in 4=dupex */
snd_rawmidi_info_get_id(info), /* hardware id (out in?) */
snd_rawmidi_info_get_name(info),
snd_rawmidi_info_get_subdevice_name(info),
snd_rawmidi_info_get_subdevices_count(info));
strcat(buf, one);
}
snd_rawmidi_info_free(info);
return(buf);
}
/*
userData is assumed to be a pointer to ALSA_MIDIDeviceDescription.
ALSA_MIDIDeviceDescription->index has to be set to the index of the device
we want to get information of before this method is called the first time via
iterateRawmidiDevices(). On each call of this method,
ALSA_MIDIDeviceDescription->index is decremented. If it is equal to zero,
we have reached the desired device, so action is taken.
So after successful completion of iterateRawmidiDevices(),
ALSA_MIDIDeviceDescription->index is zero. If it isn't, this is an
indication of an error.
*/
static int deviceInfoIterator(UINT32 deviceID, snd_rawmidi_info_t *rawmidi_info,
snd_ctl_card_info_t *cardinfo, void *userData) {
char buffer[300];
ALSA_MIDIDeviceDescription* desc = (ALSA_MIDIDeviceDescription*)userData;
#ifdef ALSA_MIDI_USE_PLUGHW
int usePlugHw = 1;
#else
int usePlugHw = 0;
#endif
TRACE0("deviceInfoIterator\n");
initAlsaSupport();
if (desc->index == 0) {
// we found the device with correct index
desc->deviceID = deviceID;
buffer[0]=' '; buffer[1]='[';
// buffer[300] is enough to store the actual device string w/o overrun
getDeviceStringFromDeviceID(&buffer[2], deviceID, usePlugHw, ALSA_RAWMIDI);
strncat(buffer, "]", sizeof(buffer) - strlen(buffer) - 1);
strncpy(desc->name,
(cardinfo != NULL)
? snd_ctl_card_info_get_id(cardinfo)
: snd_rawmidi_info_get_id(rawmidi_info),
desc->strLen - strlen(buffer));
strncat(desc->name, buffer, desc->strLen - strlen(desc->name));
desc->description[0] = 0;
if (cardinfo != NULL) {
strncpy(desc->description, snd_ctl_card_info_get_name(cardinfo),
desc->strLen);
strncat(desc->description, ", ",
desc->strLen - strlen(desc->description));
}
strncat(desc->description, snd_rawmidi_info_get_id(rawmidi_info),
desc->strLen - strlen(desc->description));
strncat(desc->description, ", ", desc->strLen - strlen(desc->description));
strncat(desc->description, snd_rawmidi_info_get_name(rawmidi_info),
desc->strLen - strlen(desc->description));
TRACE2("Returning %s, %s\n", desc->name, desc->description);
return FALSE; // do not continue iteration
}
desc->index--;
return TRUE;
}
