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Merged
kfox merged 1 commit into from
Jul 8, 2026
Merged

feat(midi): MIDI CC control surface for live performance #73

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5 changes: 5 additions & 0 deletions CLAUDE.md
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Original file line number Diff line number Diff line change
Expand Up @@ -147,6 +147,11 @@ c64cast/
├── framebuffer.py Software VIC mirror used by preview + recording
├── preview.py Pygame preview window + cv2.VideoWriter recorder
├── control_plane.py FastAPI HTTP control plane (pause/resume/skip/reload)
├── midi_control.py Process-wide MIDI control surface for live performance:
│ scene jumps/style-cycle/transport via Playlist Events +
│ live effect/generator param sweeps via LIVE_PARAMS;
│ own MIDI port (separate from MidiScene), MIDI channel
│ selects the target ensemble system
├── c64.py Centralized C64 hardware constants (VIC/SID/CIA/KERNAL)
├── interstitial.py InterstitialScene: centered "UP NEXT" text + parallax bg
├── backgrounds.py Parallax background styles for the interstitial
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276 changes: 276 additions & 0 deletions c64cast.schema.json
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Expand Up @@ -719,6 +719,282 @@
}
}
},
"midi_control": {
"type": "object",
"description": "MIDI CC control surface for live performance: scene jumps, style cycling, transport, live effect params (extra).",
"additionalProperties": false,
"properties": {
"enabled": {
"type": "boolean",
"description": "Run the MIDI control listener; requires the 'midi' extra.",
"default": false
},
"port": {
"type": [
"string",
"null"
],
"description": "MIDI input port name (substring match, case-insensitive). None = first available port."
},
"broadcast_channel": {
"type": "integer",
"description": "1-based MIDI channel that targets every system at once in ensemble mode. Other channels 1..N target the Nth system in ensemble order. Ignored in single-system mode (the one playlist is always the target).",
"default": 16
},
"jump_transition": {
"type": "string",
"description": "How a 'jump' action changes scenes: 'cut' (instant, no interstitial \u2014 the live-performance default) or 'interstitial' (routes through the normal UP-NEXT card).",
"enum": [
"cut",
"interstitial"
],
"default": "cut"
},
"cc_map": {
"type": "array",
"description": "MIDI-message -> action mappings ([[midi_control.cc_map]] tables); see --describe section:midi_control. Set to [] to disable the shipped defaults, or override/extend individual entries. Each entry: type ('cc'|'note'|'pc'), number (0-127), action ('pause'|'resume'|'toggle_pause'|'skip'|'cycle_style'|'jump'|'param'); 'jump' also needs an int scene; 'param' also needs a string target ('effect.<name>' or 'source.<name>', matching a LIVE_PARAMS entry on the current scene's effect/generator).",
"default": [
{
"type": "note",
"number": 36,
"action": "skip"
},
{
"type": "note",
"number": 37,
"action": "cycle_style"
},
{
"type": "note",
"number": 38,
"action": "toggle_pause"
},
{
"type": "note",
"number": 39,
"action": "jump",
"scene": 0
},
{
"type": "note",
"number": 40,
"action": "jump",
"scene": 0
},
{
"type": "note",
"number": 41,
"action": "jump",
"scene": 1
},
{
"type": "note",
"number": 42,
"action": "jump",
"scene": 2
},
{
"type": "note",
"number": 43,
"action": "jump",
"scene": 3
},
{
"type": "note",
"number": 44,
"action": "jump",
"scene": 4
},
{
"type": "note",
"number": 45,
"action": "jump",
"scene": 5
},
{
"type": "note",
"number": 46,
"action": "jump",
"scene": 6
},
{
"type": "note",
"number": 47,
"action": "jump",
"scene": 7
},
{
"type": "note",
"number": 48,
"action": "jump",
"scene": 8
},
{
"type": "note",
"number": 49,
"action": "jump",
"scene": 9
},
{
"type": "note",
"number": 50,
"action": "jump",
"scene": 10
},
{
"type": "note",
"number": 51,
"action": "jump",
"scene": 11
},
{
"type": "note",
"number": 52,
"action": "jump",
"scene": 12
},
{
"type": "note",
"number": 53,
"action": "jump",
"scene": 13
},
{
"type": "note",
"number": 54,
"action": "jump",
"scene": 14
},
{
"type": "note",
"number": 55,
"action": "jump",
"scene": 15
},
{
"type": "pc",
"number": 0,
"action": "jump",
"scene": 0
},
{
"type": "pc",
"number": 1,
"action": "jump",
"scene": 1
},
{
"type": "pc",
"number": 2,
"action": "jump",
"scene": 2
},
{
"type": "pc",
"number": 3,
"action": "jump",
"scene": 3
},
{
"type": "pc",
"number": 4,
"action": "jump",
"scene": 4
},
{
"type": "pc",
"number": 5,
"action": "jump",
"scene": 5
},
{
"type": "pc",
"number": 6,
"action": "jump",
"scene": 6
},
{
"type": "pc",
"number": 7,
"action": "jump",
"scene": 7
},
{
"type": "pc",
"number": 8,
"action": "jump",
"scene": 8
},
{
"type": "pc",
"number": 9,
"action": "jump",
"scene": 9
},
{
"type": "pc",
"number": 10,
"action": "jump",
"scene": 10
},
{
"type": "pc",
"number": 11,
"action": "jump",
"scene": 11
},
{
"type": "pc",
"number": 12,
"action": "jump",
"scene": 12
},
{
"type": "pc",
"number": 13,
"action": "jump",
"scene": 13
},
{
"type": "pc",
"number": 14,
"action": "jump",
"scene": 14
},
{
"type": "pc",
"number": 15,
"action": "jump",
"scene": 15
},
{
"type": "cc",
"number": 13,
"action": "param",
"target": "effect.decay"
},
{
"type": "cc",
"number": 14,
"action": "param",
"target": "source.speed"
},
{
"type": "cc",
"number": 15,
"action": "param",
"target": "source.scale"
},
{
"type": "cc",
"number": 16,
"action": "param",
"target": "source.scroll_speed"
}
]
}
}
},
"menu": {
"type": "object",
"description": "On-C64 SPACE-key menu for live scene tweaks.",
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28 changes: 28 additions & 0 deletions c64cast/cli.py
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Expand Up @@ -1003,6 +1003,7 @@ def _resolve_configs(args: argparse.Namespace) -> tuple[cfgmod.LoadResult, list[
paths=[None],
is_ensemble=False,
master_control=cfg.control,
master_midi_control=cfg.midi_control,
)
return loaded, [cfg]

Expand Down Expand Up @@ -1122,6 +1123,7 @@ def main(argv=None) -> int:
paths=loaded.paths,
is_ensemble=loaded.is_ensemble,
master_control=loaded.master_control,
master_midi_control=loaded.master_midi_control,
)
diagnostics = validate_load_result(merged, probe_u64=not cfgs[0].debug.skip_probe)
return print_report(diagnostics)
Expand Down Expand Up @@ -1217,6 +1219,7 @@ def main(argv=None) -> int:
)

control_server = None
midi_control_listener = None

# SIGTERM → graceful shutdown. SIGINT continues to raise KeyboardInterrupt
# via the default handler so the user can still Ctrl+C interactively.
Expand Down Expand Up @@ -1303,8 +1306,33 @@ def _on_sighup(_signum, _frame):
except RuntimeError as e:
log.error("control plane disabled: %s", e)

# Optional MIDI control surface for live performance. One listener
# for the whole ensemble (like [control]); MIDI channel selects the
# target system. See midi_control.py's module docstring for the
# latency rationale.
midi_cfg = loaded.master_midi_control if loaded.is_ensemble else cfgs[0].midi_control
if midi_cfg.enabled:
try:
cfgmod.validate_midi_control_cfg(midi_cfg)
from .midi_control import build_midi_control_listener

midi_control_listener = build_midi_control_listener(
playlists={st.name: st.playlist for st in stacks},
cfg=midi_cfg,
)
midi_control_listener.start()
except (cfgmod.ConfigError, RuntimeError, ValueError) as e:
log.error("MIDI control disabled: %s", e)

_run_playlists(stacks, stop_event)
finally:
# Stop input surfaces before tearing down what they act on — same
# ordering the keyboard/vision controllers already follow.
if midi_control_listener is not None:
try:
midi_control_listener.stop()
except Exception:
log.exception("MIDI control shutdown failed")
if control_server is not None:
try:
control_server.stop()
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