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/*
* Simple event decoder
*/
static char *event_names[256] = {
[SND_SEQ_EVENT_SYSTEM]= "System",
[SND_SEQ_EVENT_RESULT]= "Result",
[SND_SEQ_EVENT_NOTE]= "Note",
[SND_SEQ_EVENT_NOTEON]= "Note On",
[SND_SEQ_EVENT_NOTEOFF]= "Note Off",
[SND_SEQ_EVENT_KEYPRESS]= "Key Pressure",
[SND_SEQ_EVENT_CONTROLLER]= "Controller",
[SND_SEQ_EVENT_PGMCHANGE]= "Program Change",
[SND_SEQ_EVENT_CHANPRESS]= "Channel Pressure",
[SND_SEQ_EVENT_PITCHBEND]= "Pitchbend",
[SND_SEQ_EVENT_CONTROL14]= "Control14",
[SND_SEQ_EVENT_NONREGPARAM]= "Nonregparam",
[SND_SEQ_EVENT_REGPARAM]= "Regparam",
[SND_SEQ_EVENT_SONGPOS]= "Song Position",
[SND_SEQ_EVENT_SONGSEL]= "Song Select",
[SND_SEQ_EVENT_QFRAME]= "Qframe",
[SND_SEQ_EVENT_TIMESIGN]= "SMF Time Signature",
[SND_SEQ_EVENT_KEYSIGN]= "SMF Key Signature",
[SND_SEQ_EVENT_START]= "Start",
[SND_SEQ_EVENT_CONTINUE]= "Continue",
[SND_SEQ_EVENT_STOP]= "Stop",
[SND_SEQ_EVENT_SETPOS_TICK]= "Set Position Tick",
[SND_SEQ_EVENT_SETPOS_TIME]= "Set Position Time",
[SND_SEQ_EVENT_TEMPO]= "Tempo",
[SND_SEQ_EVENT_CLOCK]= "Clock",
[SND_SEQ_EVENT_TICK]= "Tick",
[SND_SEQ_EVENT_TUNE_REQUEST]= "Tune Request",
[SND_SEQ_EVENT_RESET]= "Reset",
[SND_SEQ_EVENT_SENSING]= "Active Sensing",
[SND_SEQ_EVENT_ECHO]= "Echo",
[SND_SEQ_EVENT_OSS]= "OSS",
[SND_SEQ_EVENT_CLIENT_START]= "Client Start",
[SND_SEQ_EVENT_CLIENT_EXIT]= "Client Exit",
[SND_SEQ_EVENT_CLIENT_CHANGE]= "Client Change",
[SND_SEQ_EVENT_PORT_START]= "Port Start",
[SND_SEQ_EVENT_PORT_EXIT]= "Port Exit",
[SND_SEQ_EVENT_PORT_CHANGE]= "Port Change",
[SND_SEQ_EVENT_PORT_SUBSCRIBED]= "Port Subscribed",
[SND_SEQ_EVENT_PORT_UNSUBSCRIBED]= "Port Unsubscribed",
#if 0
[SND_SEQ_EVENT_SAMPLE]= "Sample",
[SND_SEQ_EVENT_SAMPLE_CLUSTER]= "Sample Cluster",
[SND_SEQ_EVENT_SAMPLE_START]= "Sample Start",
[SND_SEQ_EVENT_SAMPLE_STOP]= "Sample Stop",
[SND_SEQ_EVENT_SAMPLE_FREQ]= "Sample Freq",
[SND_SEQ_EVENT_SAMPLE_VOLUME]= "Sample Volume",
[SND_SEQ_EVENT_SAMPLE_LOOP]= "Sample Loop",
[SND_SEQ_EVENT_SAMPLE_POSITION]= "Sample Position",
[SND_SEQ_EVENT_SAMPLE_PRIVATE1]= "Sample Private1",
#endif
[SND_SEQ_EVENT_USR0]= "User 0",
[SND_SEQ_EVENT_USR1]= "User 1",
[SND_SEQ_EVENT_USR2]= "User 2",
[SND_SEQ_EVENT_USR3]= "User 3",
[SND_SEQ_EVENT_USR4]= "User 4",
[SND_SEQ_EVENT_USR5]= "User 5",
[SND_SEQ_EVENT_USR6]= "User 6",
[SND_SEQ_EVENT_USR7]= "User 7",
[SND_SEQ_EVENT_USR8]= "User 8",
[SND_SEQ_EVENT_USR9]= "User 9",
#if 0
[SND_SEQ_EVENT_INSTR_BEGIN]= "Instr Begin",
[SND_SEQ_EVENT_INSTR_END]= "Instr End",
[SND_SEQ_EVENT_INSTR_INFO]= "Instr Info",
[SND_SEQ_EVENT_INSTR_INFO_RESULT]= "Instr Info Result",
[SND_SEQ_EVENT_INSTR_FINFO]= "Instr Font Info",
[SND_SEQ_EVENT_INSTR_FINFO_RESULT]= "Instr Font Info Result",
[SND_SEQ_EVENT_INSTR_RESET]= "Instr Reset",
[SND_SEQ_EVENT_INSTR_STATUS]= "Instr Status",
[SND_SEQ_EVENT_INSTR_STATUS_RESULT]= "Instr Status Result",
[SND_SEQ_EVENT_INSTR_PUT]= "Instr Put",
[SND_SEQ_EVENT_INSTR_GET]= "Instr Get",
[SND_SEQ_EVENT_INSTR_GET_RESULT]= "Instr Get Result",
[SND_SEQ_EVENT_INSTR_FREE]= "Instr Free",
[SND_SEQ_EVENT_INSTR_LIST]= "Instr List",
[SND_SEQ_EVENT_INSTR_LIST_RESULT]= "Instr List Result",
[SND_SEQ_EVENT_INSTR_CLUSTER]= "Instr Cluster",
[SND_SEQ_EVENT_INSTR_CLUSTER_GET]= "Instr Cluster Get",
[SND_SEQ_EVENT_INSTR_CLUSTER_RESULT]= "Instr Cluster Result",
[SND_SEQ_EVENT_INSTR_CHANGE]= "Instr Change",
#endif
[SND_SEQ_EVENT_SYSEX]= "Sysex",
[SND_SEQ_EVENT_BOUNCE]= "Bounce",
[SND_SEQ_EVENT_USR_VAR0]= "User Var0",
[SND_SEQ_EVENT_USR_VAR1]= "User Var1",
[SND_SEQ_EVENT_USR_VAR2]= "User Var2",
[SND_SEQ_EVENT_USR_VAR3]= "User Var3",
[SND_SEQ_EVENT_USR_VAR4]= "User Var4",
#if 0
[SND_SEQ_EVENT_IPCSHM]= "IPC Shm",
[SND_SEQ_EVENT_USR_VARIPC0]= "User IPC0",
[SND_SEQ_EVENT_USR_VARIPC1]= "User IPC1",
[SND_SEQ_EVENT_USR_VARIPC2]= "User IPC2",
[SND_SEQ_EVENT_USR_VARIPC3]= "User IPC3",
[SND_SEQ_EVENT_USR_VARIPC4]= "User IPC4",
#endif
[SND_SEQ_EVENT_NONE]= "None",
};
int decode_event(snd_seq_event_t * ev)
{
char *space = " ";
printf("EVENT>>> Type = %d, flags = 0x%x", ev->type, ev->flags);
switch (ev->flags & SND_SEQ_TIME_STAMP_MASK) {
case SND_SEQ_TIME_STAMP_TICK:
printf(", time = %d ticks",
ev->time.tick);
break;
case SND_SEQ_TIME_STAMP_REAL:
printf(", time = %d.%09d",
(int)ev->time.time.tv_sec,
(int)ev->time.time.tv_nsec);
break;
}
printf("\n%sSource = %d.%d, dest = %d.%d, queue = %d\n",
space,
ev->source.client,
ev->source.port,
ev->dest.client,
ev->dest.port,
ev->queue);
if (event_names[ev->type])
printf("%sEvent = %s", space, event_names[ev->type]);
else
printf("%sEvent = Reserved %d\n", space, ev->type);
/* decode the actual event data... */
switch (ev->type) {
case SND_SEQ_EVENT_NOTE:
printf("; ch=%d, note=%d, velocity=%d, off_velocity=%d, duration=%d\n",
ev->data.note.channel,
ev->data.note.note,
ev->data.note.velocity,
ev->data.note.off_velocity,
ev->data.note.duration);
break;
case SND_SEQ_EVENT_NOTEON:
case SND_SEQ_EVENT_NOTEOFF:
case SND_SEQ_EVENT_KEYPRESS:
printf("; ch=%d, note=%d, velocity=%d\n",
ev->data.note.channel,
ev->data.note.note,
ev->data.note.velocity);
break;
case SND_SEQ_EVENT_CONTROLLER:
printf("; ch=%d, param=%i, value=%i\n",
ev->data.control.channel,
ev->data.control.param,
ev->data.control.value);
break;
case SND_SEQ_EVENT_PGMCHANGE:
printf("; ch=%d, program=%i\n",
ev->data.control.channel,
ev->data.control.value);
break;
case SND_SEQ_EVENT_CHANPRESS:
case SND_SEQ_EVENT_PITCHBEND:
printf("; ch=%d, value=%i\n",
ev->data.control.channel,
ev->data.control.value);
break;
case SND_SEQ_EVENT_SYSEX:
{
unsigned char *sysex = (unsigned char *) ev + sizeof(snd_seq_event_t);
unsigned int c;
printf("; len=%d [", ev->data.ext.len);
for (c = 0; c < ev->data.ext.len; c++) {
printf("%02x%s", sysex[c], c < ev->data.ext.len - 1 ? ":" : "");
}
printf("]\n");
}
break;
case SND_SEQ_EVENT_QFRAME:
printf("; frame=0x%02x\n", ev->data.control.value);
break;
case SND_SEQ_EVENT_CLOCK:
case SND_SEQ_EVENT_START:
case SND_SEQ_EVENT_CONTINUE:
case SND_SEQ_EVENT_STOP:
printf("; queue = %i\n", ev->data.queue.queue);
break;
case SND_SEQ_EVENT_SENSING:
printf("\n");
break;
case SND_SEQ_EVENT_ECHO:
{
int i;
printf("; ");
for (i = 0; i < 8; i++) {
printf("%02i%s", ev->data.raw8.d[i], i < 7 ? ":" : "\n");
}
}
break;
case SND_SEQ_EVENT_CLIENT_START:
case SND_SEQ_EVENT_CLIENT_EXIT:
case SND_SEQ_EVENT_CLIENT_CHANGE:
printf("; client=%i\n", ev->data.addr.client);
break;
case SND_SEQ_EVENT_PORT_START:
case SND_SEQ_EVENT_PORT_EXIT:
case SND_SEQ_EVENT_PORT_CHANGE:
printf("; client=%i, port = %i\n", ev->data.addr.client, ev->data.addr.port);
break;
case SND_SEQ_EVENT_PORT_SUBSCRIBED:
case SND_SEQ_EVENT_PORT_UNSUBSCRIBED:
printf("; %i:%i -> %i:%i\n",
ev->data.connect.sender.client, ev->data.connect.sender.port,
ev->data.connect.dest.client, ev->data.connect.dest.port);
break;
default:
printf("; not implemented\n");
}
switch (ev->flags & SND_SEQ_EVENT_LENGTH_MASK) {
case SND_SEQ_EVENT_LENGTH_FIXED:
return sizeof(snd_seq_event_t);
case SND_SEQ_EVENT_LENGTH_VARIABLE:
return sizeof(snd_seq_event_t) + ev->data.ext.len;
}
return 0;
}
void event_decoder_start_timer(snd_seq_t *handle, int queue,
int client ATTRIBUTE_UNUSED,
int port ATTRIBUTE_UNUSED)
{
int err;
if ((err = snd_seq_start_queue(handle, queue, NULL))<0)
fprintf(stderr, "Timer event output error: %s\n", snd_strerror(err));
while (snd_seq_drain_output(handle)>0)
sleep(1);
}
void event_decoder(snd_seq_t *handle, int argc, char *argv[])
{
snd_seq_event_t *ev;
snd_seq_port_info_t *pinfo;
snd_seq_port_subscribe_t *sub;
snd_seq_addr_t addr;
int client, port, queue, max, err, v1, v2;
char *ptr;
struct pollfd *pfds;
if ((client = snd_seq_client_id(handle))<0) {
fprintf(stderr, "Cannot determine client number: %s\n", snd_strerror(client));
return;
}
printf("Client ID = %i\n", client);
if ((queue = snd_seq_alloc_queue(handle))<0) {
fprintf(stderr, "Cannot allocate queue: %s\n", snd_strerror(queue));
return;
}
printf("Queue ID = %i\n", queue);
if ((err = snd_seq_nonblock(handle, 1))<0)
fprintf(stderr, "Cannot set nonblock mode: %s\n", snd_strerror(err));
snd_seq_port_info_alloca(&pinfo);
snd_seq_port_info_set_name(pinfo, "Input");
snd_seq_port_info_set_type(pinfo, SND_SEQ_PORT_TYPE_MIDI_GENERIC);
snd_seq_port_info_set_capability(pinfo, SND_SEQ_PORT_CAP_WRITE | SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_SUBS_WRITE);
if ((err = snd_seq_create_port(handle, pinfo)) < 0) {
fprintf(stderr, "Cannot create input port: %s\n", snd_strerror(err));
return;
}
port = snd_seq_port_info_get_port(pinfo);
event_decoder_start_timer(handle, queue, client, port);
snd_seq_port_subscribe_alloca(&sub);
addr.client = SND_SEQ_CLIENT_SYSTEM;
addr.port = SND_SEQ_PORT_SYSTEM_ANNOUNCE;
snd_seq_port_subscribe_set_sender(sub, &addr);
addr.client = client;
addr.port = port;
snd_seq_port_subscribe_set_dest(sub, &addr);
snd_seq_port_subscribe_set_queue(sub, queue);
snd_seq_port_subscribe_set_time_update(sub, 1);
snd_seq_port_subscribe_set_time_real(sub, 1);
if ((err = snd_seq_subscribe_port(handle, sub))<0) {
fprintf(stderr, "Cannot subscribe announce port: %s\n", snd_strerror(err));
return;
}
addr.client = SND_SEQ_CLIENT_SYSTEM;
addr.port = SND_SEQ_PORT_SYSTEM_TIMER;
snd_seq_port_subscribe_set_sender(sub, &addr);
if ((err = snd_seq_subscribe_port(handle, sub))<0) {
fprintf(stderr, "Cannot subscribe timer port: %s\n", snd_strerror(err));
return;
}
for (max = 0; max < argc; max++) {
ptr = argv[max];
if (!ptr)
continue;
snd_seq_port_subscribe_set_time_real(sub, 0);
if (tolower(*ptr) == 'r') {
snd_seq_port_subscribe_set_time_real(sub, 1);
ptr++;
}
if (sscanf(ptr, "%i.%i", &v1, &v2) != 2) {
fprintf(stderr, "Wrong argument '%s'...\n", argv[max]);
return;
}
addr.client = v1;
addr.port = v2;
snd_seq_port_subscribe_set_sender(sub, &addr);
if ((err = snd_seq_subscribe_port(handle, sub))<0) {
fprintf(stderr, "Cannot subscribe port %i from client %i: %s\n", v2, v1, snd_strerror(err));
return;
}
}
max = snd_seq_poll_descriptors_count(handle, POLLIN);
pfds = alloca(sizeof(*pfds) * max);
while (1) {
snd_seq_poll_descriptors(handle, pfds, max, POLLIN);
if (poll(pfds, max, -1) < 0)
break;
do {
if ((err = snd_seq_event_input(handle, &ev))<0)
break;
if (!ev)
continue;
decode_event(ev);
snd_seq_free_event(ev);
} while (err > 0);
}
}
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