diff options
Diffstat (limited to 'backends/jack.c')
| -rw-r--r-- | backends/jack.c | 72 |
1 files changed, 71 insertions, 1 deletions
diff --git a/backends/jack.c b/backends/jack.c index a3caf73..176144f 100644 --- a/backends/jack.c +++ b/backends/jack.c @@ -101,6 +101,68 @@ static void mmjack_process_midiout(void* buffer, size_t sample_offset, uint8_t t } } +//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); @@ -113,7 +175,6 @@ static int mmjack_process_midi(instance* inst, mmjack_port* port, size_t nframes if(port->input){ if(event_count){ DBGPF("Reading %u MIDI events from port %s", event_count, port->name); - //TODO (n)rpn RX for(u = 0; u < event_count; u++){ ident.label = 0; //read midi data from stream @@ -135,6 +196,15 @@ static int mmjack_process_midi(instance* inst, mmjack_port* port, size_t nframes 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); } |