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-rw-r--r--backends/jack.c174
1 files changed, 147 insertions, 27 deletions
diff --git a/backends/jack.c b/backends/jack.c
index c84ed0f..fe74a80 100644
--- a/backends/jack.c
+++ b/backends/jack.c
@@ -18,8 +18,6 @@
#endif
#endif
-//FIXME pitchbend range is somewhat oob
-
static struct /*_mmjack_backend_cfg*/ {
unsigned verbosity;
volatile sig_atomic_t jack_shutdown;
@@ -80,13 +78,98 @@ static int mmjack_midiqueue_append(mmjack_port* port, mmjack_channel_ident ident
return 0;
}
+static void mmjack_process_midiout(void* buffer, size_t sample_offset, uint8_t type, uint8_t channel, uint8_t control, uint16_t value){
+ jack_midi_data_t* event_data = jack_midi_event_reserve(buffer, sample_offset, (type == midi_aftertouch || type == midi_program) ? 2 : 3);
+
+ if(!event_data){
+ LOG("Failed to reserve MIDI stream data");
+ return;
+ }
+
+ //build midi event
+ event_data[0] = channel | type;
+ event_data[1] = control & 0x7F;
+ event_data[2] = value & 0x7F;
+
+ if(type == midi_pitchbend){
+ event_data[1] = value & 0x7F;
+ event_data[2] = (value >> 7) & 0x7F;
+ }
+ else if(type == midi_aftertouch || type == midi_program){
+ event_data[1] = value & 0x7F;
+ event_data[2] = 0;
+ }
+}
+
+//this state machine was copied more-or-less verbatim from the alsa midi implementation - fixes there will need to be integrated
+static void mmjack_handle_epn(mmjack_port* port, uint8_t chan, uint16_t control, uint16_t value){
+ mmjack_channel_ident ident = {
+ .label = 0
+ };
+
+ //switching between nrpn and rpn clears all valid bits
+ if(((port->epn_status[chan] & EPN_NRPN) && (control == 101 || control == 100))
+ || (!(port->epn_status[chan] & EPN_NRPN) && (control == 99 || control == 98))){
+ port->epn_status[chan] &= ~(EPN_NRPN | EPN_PARAMETER_LO | EPN_PARAMETER_HI);
+ }
+
+ //setting an address always invalidates the value valid bits
+ if(control >= 98 && control <= 101){
+ port->epn_status[chan] &= ~EPN_VALUE_HI;
+ }
+
+ //parameter hi
+ if(control == 101 || control == 99){
+ port->epn_control[chan] &= 0x7F;
+ port->epn_control[chan] |= value << 7;
+ port->epn_status[chan] |= EPN_PARAMETER_HI | ((control == 99) ? EPN_NRPN : 0);
+ if(control == 101 && value == 127){
+ port->epn_status[chan] &= ~EPN_PARAMETER_HI;
+ }
+ }
+
+ //parameter lo
+ if(control == 100 || control == 98){
+ port->epn_control[chan] &= ~0x7F;
+ port->epn_control[chan] |= value & 0x7F;
+ port->epn_status[chan] |= EPN_PARAMETER_LO | ((control == 98) ? EPN_NRPN : 0);
+ if(control == 100 && value == 127){
+ port->epn_status[chan] &= ~EPN_PARAMETER_LO;
+ }
+ }
+
+ //value hi, clears low, mark as update candidate
+ if(control == 6
+ //check if parameter is set before accepting value update
+ && ((port->epn_status[chan] & (EPN_PARAMETER_HI | EPN_PARAMETER_LO)) == (EPN_PARAMETER_HI | EPN_PARAMETER_LO))){
+ port->epn_value[chan] = value << 7;
+ port->epn_status[chan] |= EPN_VALUE_HI;
+ }
+
+ //value lo, flush the value
+ if(control == 38
+ && port->epn_status[chan] & EPN_VALUE_HI){
+ port->epn_value[chan] &= ~0x7F;
+ port->epn_value[chan] |= value & 0x7F;
+ port->epn_status[chan] &= ~EPN_VALUE_HI;
+
+ //find the updated channel
+ ident.fields.sub_type = port->epn_status[chan] & EPN_NRPN ? midi_nrpn : midi_rpn;
+ ident.fields.sub_channel = chan;
+ ident.fields.sub_control = port->epn_control[chan];
+
+ //ident.fields.port set on output in mmjack_handle_midi
+ mmjack_midiqueue_append(port, ident, port->epn_value[chan]);
+ }
+}
+
static int mmjack_process_midi(instance* inst, mmjack_port* port, size_t nframes, size_t* mark){
+ mmjack_instance_data* data = (mmjack_instance_data*) inst->impl;
void* buffer = jack_port_get_buffer(port->port, nframes);
jack_nframes_t event_count = jack_midi_get_event_count(buffer);
jack_midi_event_t event;
- jack_midi_data_t* event_data;
mmjack_channel_ident ident;
- size_t u;
+ size_t u, frame;
uint16_t value;
if(port->input){
@@ -109,10 +192,19 @@ static int mmjack_process_midi(instance* inst, mmjack_port* port, size_t nframes
ident.fields.sub_control = 0;
value = event.buffer[1] | (event.buffer[2] << 7);
}
- else if(ident.fields.sub_type == midi_aftertouch){
+ else if(ident.fields.sub_type == midi_aftertouch || ident.fields.sub_type == midi_program){
ident.fields.sub_control = 0;
value = event.buffer[1];
}
+
+ //forward the EPN CCs to the EPN state machine
+ if(ident.fields.sub_type == midi_cc
+ && ((ident.fields.sub_control <= 101 && ident.fields.sub_control >= 98)
+ || ident.fields.sub_control == 6
+ || ident.fields.sub_control == 38)){
+ mmjack_handle_epn(port, ident.fields.sub_channel, ident.fields.sub_control, value);
+ }
+
//append midi data
mmjack_midiqueue_append(port, ident, value);
}
@@ -124,30 +216,33 @@ static int mmjack_process_midi(instance* inst, mmjack_port* port, size_t nframes
//clear buffer
jack_midi_clear_buffer(buffer);
+ frame = 0;
for(u = 0; u < port->queue_len; u++){
- //build midi event
ident.label = port->queue[u].ident.label;
- event_data = jack_midi_event_reserve(buffer, u, (ident.fields.sub_type == midi_aftertouch) ? 2 : 3);
- if(!event_data){
- LOG("Failed to reserve MIDI stream data");
- return 1;
- }
- event_data[0] = ident.fields.sub_channel | ident.fields.sub_type;
- if(ident.fields.sub_type == midi_pitchbend){
- event_data[1] = port->queue[u].raw & 0x7F;
- event_data[2] = (port->queue[u].raw >> 7) & 0x7F;
- }
- else if(ident.fields.sub_type == midi_aftertouch){
- event_data[1] = port->queue[u].raw & 0x7F;
+
+ if(ident.fields.sub_type == midi_rpn
+ || ident.fields.sub_type == midi_nrpn){
+ //transmit parameter number
+ mmjack_process_midiout(buffer, frame++, midi_cc, ident.fields.sub_channel, (ident.fields.sub_type == midi_rpn) ? 101 : 99, (ident.fields.sub_control >> 7) & 0x7F);
+ mmjack_process_midiout(buffer, frame++, midi_cc, ident.fields.sub_channel, (ident.fields.sub_type == midi_rpn) ? 100 : 98, ident.fields.sub_control & 0x7F);
+
+ //transmit parameter value
+ mmjack_process_midiout(buffer, frame++, midi_cc, ident.fields.sub_channel, 6, (port->queue[u].raw >> 7) & 0x7F);
+ mmjack_process_midiout(buffer, frame++, midi_cc, ident.fields.sub_channel, 38, port->queue[u].raw & 0x7F);
+
+ if(!data->midi_epn_tx_short){
+ //clear active parameter
+ mmjack_process_midiout(buffer, frame++, midi_cc, ident.fields.sub_channel, 101, 127);
+ mmjack_process_midiout(buffer, frame++, midi_cc, ident.fields.sub_channel, 100, 127);
+ }
}
else{
- event_data[1] = ident.fields.sub_control;
- event_data[2] = port->queue[u].raw & 0x7F;
+ mmjack_process_midiout(buffer, frame++, ident.fields.sub_type, ident.fields.sub_channel, ident.fields.sub_control, port->queue[u].raw);
}
}
- if(port->queue_len){
- DBGPF("Wrote %" PRIsize_t " MIDI events to port %s", port->queue_len, port->name);
+ if(frame){
+ DBGPF("Wrote %" PRIsize_t " MIDI events to port %s", frame, port->name);
}
port->queue_len = 0;
}
@@ -305,6 +400,13 @@ static int mmjack_configure_instance(instance* inst, char* option, char* value){
data->server_name = strdup(value);
return 0;
}
+ else if(!strcmp(option, "epn-tx")){
+ data->midi_epn_tx_short = 0;
+ if(!strcmp(value, "short")){
+ data->midi_epn_tx_short = 1;
+ }
+ return 0;
+ }
//register new port, first check for unique name
for(p = 0; p < data->ports; p++){
@@ -385,12 +487,23 @@ static int mmjack_parse_midispec(mmjack_channel_ident* ident, char* spec){
ident->fields.sub_type = midi_pressure;
next_token += 8;
}
+ else if(!strncmp(next_token, "rpn", 3)){
+ ident->fields.sub_type = midi_rpn;
+ next_token += 3;
+ }
+ else if(!strncmp(next_token, "nrpn", 4)){
+ ident->fields.sub_type = midi_nrpn;
+ next_token += 4;
+ }
else if(!strncmp(next_token, "pitch", 5)){
ident->fields.sub_type = midi_pitchbend;
}
else if(!strncmp(next_token, "aftertouch", 10)){
ident->fields.sub_type = midi_aftertouch;
}
+ else if(!strncmp(next_token, "program", 7)){
+ ident->fields.sub_type = midi_program;
+ }
else{
LOGPF("Unknown MIDI control type in spec %s", spec);
return 1;
@@ -399,7 +512,9 @@ static int mmjack_parse_midispec(mmjack_channel_ident* ident, char* spec){
ident->fields.sub_control = strtoul(next_token, NULL, 10);
if(ident->fields.sub_type == midi_none
- || ident->fields.sub_control > 127){
+ || (ident->fields.sub_type != midi_nrpn
+ && ident->fields.sub_type != midi_rpn
+ && ident->fields.sub_control > 127)){
LOGPF("Invalid MIDI spec %s", spec);
return 1;
}
@@ -467,9 +582,12 @@ static int mmjack_set(instance* inst, size_t num, channel** c, channel_value* v)
break;
case port_midi:
value = v[u].normalised * 127.0;
- if(ident.fields.sub_type == midi_pitchbend){
- value = ((uint16_t)(v[u].normalised * 16384.0));
+ if(ident.fields.sub_type == midi_pitchbend
+ || ident.fields.sub_type == midi_nrpn
+ || ident.fields.sub_type == midi_rpn){
+ value = ((uint16_t)(v[u].normalised * 16383.0));
}
+
if(mmjack_midiqueue_append(data->port + ident.fields.port, ident, value)){
pthread_mutex_unlock(&data->port[ident.fields.port].lock);
return 1;
@@ -494,8 +612,10 @@ static void mmjack_handle_midi(instance* inst, size_t index, mmjack_port* port){
port->queue[u].ident.fields.port = index;
chan = mm_channel(inst, port->queue[u].ident.label, 0);
if(chan){
- if(port->queue[u].ident.fields.sub_type == midi_pitchbend){
- val.normalised = ((double)port->queue[u].raw) / 16384.0;
+ if(port->queue[u].ident.fields.sub_type == midi_pitchbend
+ || port->queue[u].ident.fields.sub_type == midi_rpn
+ || port->queue[u].ident.fields.sub_type == midi_nrpn){
+ val.normalised = ((double)port->queue[u].raw) / 16383.0;
}
else{
val.normalised = ((double)port->queue[u].raw) / 127.0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 06:08:58 +0000