ParamSetter.py

import Live

from . import MIDI
from . import settings
from .Logging import log


# general device parameter setter
def general_device(song, device, param, value, mode, status):
    param_range = param.max - param.min
    # log("set %s (%s): %s - %s" % (param.name, param.value, param.min, param.max))
    if param.is_quantized:
        if status == MIDI.CC_STATUS and mode == MIDI.ABSOLUTE:
            # absolute CC
            param.value = round(param_range * value / 127.0 + param.min)
        else:
            # relative CC or NOTE
            if param_range == 1 or status == MIDI.NOTEON_STATUS:
                # circle through quantized values
                p_value = param.value + value
                if p_value > param.max:
                    # values can be bigger than one => take overlap and add it min
                    p_value = param.min + (p_value % (param_range + 1))
                elif p_value < param.min:
                    p_value = param.max - ((p_value - 1) % (param_range + 1))
                param.value = p_value
            else:
                # range is bigger than on/off and we have relative CC
                # => do NOT circle through quantized values
                param.value = max(param.min, min(param.max, param.value + value))
    else:
        if mode == MIDI.ABSOLUTE:
            param.value = param_range * value / 127.0 + param.min
        else:
            # param.value = max(param.min, min(param.max, param.value + (value/100.0)))
            if param_range > 4:
                param.value = max(param.min, min(param.max, param.value + value))
            else:
                param.value = max(
                    param.min, min(param.max, param.value + param_range * value / 127.0)
                )


def looper(song, device, param, value, mode, status):
    if not param.name == "State":
        general_device(song, device, param, value, mode, status)
        return
    # get current state:
    # 1 - record; 0 - stop; 2 - play; 3 - overdub;
    if not value:
        return

    # floor value to a stepping value
    if param.value == 3:
        # if "overdub" is active, step back to "play"
        value = -1
    else:
        value = 1

    if param.value == 0:
        # enable play for record to work
        song.continue_playing()

    param.value = param.value + value

    # general_device(song, device, param, value, mode, status)


setters = {"Looper": looper}


def get(device):
    if device.name in setters:
        return setters[device.name]
    return general_device