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Support for midi output using ALSA #62

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Support for midi output using ALSA #62

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1fc9ae1
fix linking error
caropf Apr 14, 2020
864c1bc
support for midi output using alsa
caropf Apr 23, 2020
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20 changes: 17 additions & 3 deletions tool
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,8 @@ Optional Features:
--portmidi Enable or disable hardware MIDI output support with
--no-portmidi PortMidi. Note: PortMidi has memory leaks and bugs.
Default: disabled.
--alsa Enable or disable MIDI output support with ALSA.
Default: disabled.
--mouse Enable or disable mouse features in the livecoding
--no-mouse environment.
Default: enabled.
Expand Down Expand Up @@ -86,6 +88,7 @@ stats_enabled=0
pie_enabled=0
static_enabled=0
portmidi_enabled=0
alsa_enabled=0
mouse_disabled=0
config_mode=release

Expand All @@ -101,6 +104,8 @@ while getopts c:dhsv-: opt_val; do
no-portmidi|noportmidi) portmidi_enabled=0;;
mouse) mouse_disabled=0;;
no-mouse|nomouse) mouse_disabled=1;;
alsa) alsa_enabled=1;;
no-alsa|noalsa) alsa_enabled=0;;
*)
echo "Unknown long option --$OPTARG" >&2
print_usage >&2
Expand Down Expand Up @@ -339,11 +344,11 @@ build_target() {
case $cc_id in
gcc)
if cc_vers_is_gte 4.9; then
add cc_flags -march=nehalem
add cc_flags -march=native
fi
;;
clang)
add cc_flags -march=nehalem
add cc_flags -march=native
;;
esac
;;
Expand Down Expand Up @@ -400,7 +405,12 @@ build_target() {
add cc_flags -D_POSIX_C_SOURCE=200809L
;;
esac
add libraries -lmenuw -lformw -lncursesw
add libraries -lmenuw -lformw -lncursesw -ltinfow
if [[ $portmidi_enabled = 1 && $alsa_enabled = 1 ]]; then
# TODO mensagem melhor de erro?
echo -e "You can either have alsa or portmidi enabled, but not both"
exit 1
fi
if [[ $portmidi_enabled = 1 ]]; then
add libraries -lportmidi
add cc_flags -DFEAT_PORTMIDI
Expand All @@ -411,6 +421,10 @@ build_target() {
if [[ $mouse_disabled = 1 ]]; then
add cc_flags -DFEAT_NOMOUSE
fi
if [[ $alsa_enabled = 1 ]]; then
add libraries -lasound
add cc_flags -DFEAT_ALSA
fi
;;
*)
echo -e "Unknown build target '$1'\\nValid targets: orca, cli" >&2
Expand Down
84 changes: 84 additions & 0 deletions tui_main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,10 @@
#include <portmidi.h>
#endif

#ifdef FEAT_ALSA
#include <alsa/asoundlib.h>
#endif

#define TIME_DEBUG 0
#if TIME_DEBUG
static int spin_track_timeout = 0;
Expand Down Expand Up @@ -727,6 +731,9 @@ typedef enum {
#ifdef FEAT_PORTMIDI
Midi_mode_type_portmidi,
#endif
#ifdef FEAT_ALSA
Midi_mode_type_alsa,
#endif
} Midi_mode_type;

typedef struct {
Expand All @@ -749,19 +756,31 @@ typedef struct {
static bool portmidi_is_initialized = false;
#endif

#ifdef FEAT_ALSA
typedef struct {
Midi_mode_type type;
snd_seq_t *seq;
int port_id;
} Midi_mode_alsa;
#endif

typedef union {
Midi_mode_any any;
Midi_mode_osc_bidule osc_bidule;
#ifdef FEAT_PORTMIDI
Midi_mode_portmidi portmidi;
#endif
#ifdef FEAT_ALSA
Midi_mode_alsa alsa;
#endif
} Midi_mode;

void midi_mode_init_null(Midi_mode *mm) { mm->any.type = Midi_mode_type_null; }
void midi_mode_init_osc_bidule(Midi_mode *mm, char const *path) {
mm->osc_bidule.type = Midi_mode_type_osc_bidule;
mm->osc_bidule.path = path;
}

#ifdef FEAT_PORTMIDI
enum {
Portmidi_artificial_latency = 1,
Expand Down Expand Up @@ -842,6 +861,19 @@ static bool portmidi_find_name_of_device_id(PmDeviceID id, PmError *out_pmerror,
return true;
}
#endif

#ifdef FEAT_ALSA
static void midi_mode_init_alsa(Midi_mode *mm) {
mm->alsa.type = Midi_mode_type_alsa;
if(snd_seq_open(&mm->alsa.seq, "default", SND_SEQ_OPEN_OUTPUT, SND_SEQ_NONBLOCK)) {
midi_mode_init_null(mm);
exit(1);
}
snd_seq_set_client_name(mm->alsa.seq, "orca");
mm->alsa.port_id = snd_seq_create_simple_port(mm->alsa.seq, "orca", SND_SEQ_PORT_CAP_READ|SND_SEQ_PORT_CAP_SUBS_READ, SND_SEQ_PORT_TYPE_MIDI_GENERIC);
}
#endif

staticni void midi_mode_deinit(Midi_mode *mm) {
switch (mm->any.type) {
case Midi_mode_type_null:
Expand All @@ -863,6 +895,11 @@ staticni void midi_mode_deinit(Midi_mode *mm) {
sleep(0);
Pm_Close(mm->portmidi.stream);
break;
#endif
#ifdef FEAT_ALSA
case Midi_mode_type_alsa:
snd_seq_close(mm->alsa.seq);
break;
#endif
}
}
Expand Down Expand Up @@ -922,7 +959,11 @@ static void ged_init(Ged *a, Usz undo_limit, Usz init_bpm, Usz init_seed) {
a->accum_secs = 0.0;
a->time_to_next_note_off = 1.0;
a->oosc_dev = NULL;
#ifdef FEAT_ALSA
midi_mode_init_alsa(&a->midi_mode);
#else
midi_mode_init_null(&a->midi_mode);
#endif
a->activity_counter = 0;
a->random_seed = init_seed;
a->drag_start_y = a->drag_start_x = 0;
Expand Down Expand Up @@ -989,6 +1030,46 @@ staticni void send_midi_3bytes(Oosc_dev *oosc_dev, Midi_mode const *midi_mode,
(void)pme;
break;
}
#endif
#ifdef FEAT_ALSA
case Midi_mode_type_alsa: {
int ignore = 0;
int type = status >> 4;
int channel = status & 0xf;
snd_seq_event_t ev;
snd_seq_ev_clear(&ev);
snd_seq_ev_set_source(&ev, midi_mode->alsa.port_id);
snd_seq_ev_set_subs(&ev);
snd_seq_ev_set_direct(&ev);
switch(status) {
case 0xfa:
ev.type = SND_SEQ_EVENT_START;
snd_seq_ev_schedule_tick(&ev, SND_SEQ_QUEUE_DIRECT, 1, 0);
break;
case 0xfc:
ev.type = SND_SEQ_EVENT_STOP;
snd_seq_ev_schedule_tick(&ev, SND_SEQ_QUEUE_DIRECT, 1, 0);
break;
case 0xf8:
ev.type = SND_SEQ_EVENT_CLOCK;
snd_seq_ev_schedule_tick(&ev, SND_SEQ_QUEUE_DIRECT, 1, 0);
break;
default:
switch(type) {
case 0x8: snd_seq_ev_set_noteoff(&ev, channel, byte1, byte2); break;
case 0x9: snd_seq_ev_set_noteon(&ev, channel, byte1, byte2); break;
case 0xb: snd_seq_ev_set_controller(&ev, channel, byte1, byte2); break;
case 0xe: snd_seq_ev_set_pitchbend(&ev, channel, (byte2<<8) | byte1); break;
default: ignore = 1;
}
}

if(!ignore) {
snd_seq_event_output(midi_mode->alsa.seq, &ev);
snd_seq_drain_output(midi_mode->alsa.seq);
} else { exit(1); }
break;
}
#endif
}
}
Expand Down Expand Up @@ -2688,6 +2769,9 @@ staticni void tui_save_prefs(Tui *t) {
Confopt_portmidi_output_device);
break;
}
#endif
#ifdef FEAT_ALSA
case Midi_mode_type_alsa: break;
#endif
}
// Add all conf items touched by user that we want to write to config file.
Expand Down