mirror of
https://github.com/vsariola/sointu.git
synced 2025-07-18 13:04:25 -04:00
606 lines
27 KiB
Go
606 lines
27 KiB
Go
package sointu
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import (
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"errors"
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"fmt"
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"math"
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"sort"
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"strconv"
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"gopkg.in/yaml.v3"
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)
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type (
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// Patch is simply a list of instruments used in a song
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Patch []Instrument
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// Instrument includes a list of units consisting of the instrument, and the number of polyphonic voices for this instrument
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Instrument struct {
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Name string `yaml:",omitempty"`
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Comment string `yaml:",omitempty"`
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NumVoices int
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Units []Unit
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Mute bool `yaml:",omitempty"` // Mute is only used in the tracker for soloing/muting instruments; the compiled player ignores this field
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}
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// Unit is e.g. a filter, oscillator, envelope and its parameters
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Unit struct {
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// Type is the type of the unit, e.g. "add","oscillator" or "envelope".
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// Always in lowercase. "" type should be ignored, no invalid types should
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// be used.
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Type string `yaml:",omitempty"`
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// ID should be a unique ID for this unit, used by SEND units to target
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// specific units. ID = 0 means that no ID has been given to a unit and thus
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// cannot be targeted by SENDs. When possible, units that are not targeted
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// by any SENDs should be cleaned from having IDs, e.g. to keep the exported
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// data clean.
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ID int `yaml:",omitempty"`
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// Parameters is a map[string]int of parameters of a unit. For example, for
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// an oscillator, unit.Type == "oscillator" and unit.Parameters["attack"]
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// could be 64. Most parameters are either limites to 0 and 1 (e.g. stereo
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// parameters) or between 0 and 128, inclusive.
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Parameters ParamMap `yaml:",flow"`
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// VarArgs is a list containing the variable number arguments that some
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// units require, most notably the DELAY units. For example, for a DELAY
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// unit, VarArgs is the delaytimes, in samples, of the different delaylines
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// in the unit.
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VarArgs []int `yaml:",flow,omitempty"`
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// Disabled is a flag that can be set to true to disable the unit.
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// Disabled units are considered to be not present in the patch.
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Disabled bool `yaml:",omitempty"`
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// Comment is a free-form comment about the unit that can be displayed
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// instead of/besides the type of the unit in the GUI, to make it easier
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// to track what the unit is doing & to make it easier to target sends.
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Comment string `yaml:",omitempty"`
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}
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ParamMap map[string]int
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// UnitParameter documents one parameter that an unit takes
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UnitParameter struct {
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Name string // thould be found with this name in the Unit.Parameters map
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MinValue int // minimum value of the parameter, inclusive
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MaxValue int // maximum value of the parameter, inclusive
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Neutral int // neutral value of the parameter
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CanSet bool // if this parameter can be set before hand i.e. through the gui
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CanModulate bool // if this parameter can be modulated i.e. has a port number in "send" unit
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DisplayFunc UnitParameterDisplayFunc
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}
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// StackUse documents how a unit will affect the signal stack.
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StackUse struct {
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Inputs [][]int // Inputs documents which inputs contribute to which outputs. len(Inputs) is the number of inputs. Each input can contribute to multiple outputs, so its a slice.
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Modifies []bool // Modifies documents which of the (mixed) inputs are actually modified by the unit
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NumOutputs int // NumOutputs is the number of outputs produced by the unit. This is used to determine how many outputs are needed for the unit.
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}
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UnitParameterDisplayFunc func(int) (value string, unit string)
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)
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// UnitTypes documents all the available unit types and if they support stereo variant
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// and what parameters they take.
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var UnitTypes = map[string]([]UnitParameter){
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"add": []UnitParameter{{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false}},
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"addp": []UnitParameter{{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false}},
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"pop": []UnitParameter{{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false}},
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"loadnote": []UnitParameter{{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false}},
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"mul": []UnitParameter{{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false}},
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"mulp": []UnitParameter{{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false}},
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"push": []UnitParameter{{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false}},
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"xch": []UnitParameter{{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false}},
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"distort": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "drive", MinValue: 0, Neutral: 64, MaxValue: 128, CanSet: true, CanModulate: true}},
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"hold": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "holdfreq", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true}},
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"crush": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "resolution", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return formatFloat(24 * float64(v) / 128), "bits" }}},
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"gain": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "gain", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return strconv.FormatFloat(toDecibel(float64(v)/128), 'g', 3, 64), "dB" }}},
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"invgain": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "invgain", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return strconv.FormatFloat(toDecibel(128/float64(v)), 'g', 3, 64), "dB" }}},
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"dbgain": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "decibels", MinValue: 0, Neutral: 64, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return formatFloat(40 * (float64(v)/64 - 1)), "dB" }}},
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"filter": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "frequency", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: filterFrequencyDispFunc},
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{Name: "resonance", MinValue: 0, Neutral: 128, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) {
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return strconv.FormatFloat(toDecibel(128/float64(v)), 'g', 3, 64), "Q dB"
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}},
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{Name: "lowpass", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "bandpass", MinValue: -1, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "highpass", MinValue: -1, MaxValue: 1, CanSet: true, CanModulate: false}},
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"clip": []UnitParameter{{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false}},
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"pan": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "panning", MinValue: 0, Neutral: 64, MaxValue: 128, CanSet: true, CanModulate: true}},
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"delay": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "pregain", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true},
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{Name: "dry", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true},
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{Name: "feedback", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true},
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{Name: "damp", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true},
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{Name: "notetracking", MinValue: 0, MaxValue: 2, CanSet: true, CanModulate: false, DisplayFunc: arrDispFunc(noteTrackingNames[:])},
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{Name: "delaytime", MinValue: 0, MaxValue: -1, CanSet: false, CanModulate: true}},
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"compressor": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "attack", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: compressorTimeDispFunc},
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{Name: "release", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: compressorTimeDispFunc},
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{Name: "invgain", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) {
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return strconv.FormatFloat(toDecibel(128/float64(v)), 'g', 3, 64), "dB"
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}},
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{Name: "threshold", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) {
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return strconv.FormatFloat(toDecibel(float64(v)/128), 'g', 3, 64), "dB"
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}},
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{Name: "ratio", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return formatFloat(1 - float64(v)/128), "" }}},
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"speed": []UnitParameter{},
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"out": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "gain", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return strconv.FormatFloat(toDecibel(float64(v)/128), 'g', 3, 64), "dB" }}},
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"outaux": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "outgain", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return strconv.FormatFloat(toDecibel(float64(v)/128), 'g', 3, 64), "dB" }},
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{Name: "auxgain", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return strconv.FormatFloat(toDecibel(float64(v)/128), 'g', 3, 64), "dB" }}},
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"aux": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "gain", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return strconv.FormatFloat(toDecibel(float64(v)/128), 'g', 3, 64), "dB" }},
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{Name: "channel", MinValue: 0, MaxValue: 6, CanSet: true, CanModulate: false, DisplayFunc: arrDispFunc(channelNames[:])}},
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"send": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "amount", MinValue: 0, Neutral: 64, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return formatFloat(float64(v)/64 - 1), "" }},
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{Name: "voice", MinValue: 0, MaxValue: 32, CanSet: true, CanModulate: false, DisplayFunc: sendVoiceDispFunc},
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{Name: "target", MinValue: 0, MaxValue: math.MaxInt32, CanSet: true, CanModulate: false},
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{Name: "port", MinValue: 0, MaxValue: 7, CanSet: true, CanModulate: false},
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{Name: "sendpop", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false}},
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"envelope": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "attack", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return engineeringTime(math.Pow(2, 24*float64(v)/128) / 44100) }},
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{Name: "decay", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return engineeringTime(math.Pow(2, 24*float64(v)/128) / 44100) }},
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{Name: "sustain", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return strconv.FormatFloat(toDecibel(float64(v)/128), 'g', 3, 64), "dB" }},
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{Name: "release", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return engineeringTime(math.Pow(2, 24*float64(v)/128) / 44100) }},
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{Name: "gain", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return strconv.FormatFloat(toDecibel(float64(v)/128), 'g', 3, 64), "dB" }}},
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"noise": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "shape", MinValue: 0, Neutral: 64, MaxValue: 128, CanSet: true, CanModulate: true},
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{Name: "gain", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return strconv.FormatFloat(toDecibel(float64(v)/128), 'g', 3, 64), "dB" }}},
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"oscillator": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "transpose", MinValue: 0, Neutral: 64, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: oscillatorTransposeDispFunc},
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{Name: "detune", MinValue: 0, Neutral: 64, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return formatFloat(float64(v-64) / 64), "st" }},
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{Name: "phase", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true},
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{Name: "color", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true},
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{Name: "shape", MinValue: 0, Neutral: 64, MaxValue: 128, CanSet: true, CanModulate: true},
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{Name: "gain", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return strconv.FormatFloat(toDecibel(float64(v)/128), 'g', 3, 64), "dB" }},
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{Name: "frequency", MinValue: 0, MaxValue: -1, CanSet: false, CanModulate: true},
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{Name: "type", MinValue: int(Sine), MaxValue: int(Sample), CanSet: true, CanModulate: false, DisplayFunc: arrDispFunc(oscTypes[:])},
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{Name: "lfo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "unison", MinValue: 0, MaxValue: 3, CanSet: true, CanModulate: false},
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{Name: "samplestart", MinValue: 0, MaxValue: 1720329, CanSet: true, CanModulate: false},
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{Name: "loopstart", MinValue: 0, MaxValue: 65535, CanSet: true, CanModulate: false},
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{Name: "looplength", MinValue: 0, MaxValue: 65535, CanSet: true, CanModulate: false}},
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"loadval": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "value", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return formatFloat(float64(v)/64 - 1), "" }}},
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"receive": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "left", MinValue: 0, MaxValue: -1, CanSet: false, CanModulate: true},
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{Name: "right", MinValue: 0, MaxValue: -1, CanSet: false, CanModulate: true}},
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"in": []UnitParameter{
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{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
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{Name: "channel", MinValue: 0, MaxValue: 6, CanSet: true, CanModulate: false, DisplayFunc: arrDispFunc(channelNames[:])}},
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"sync": []UnitParameter{},
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}
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// compile errors if interface is not implemented.
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var _ yaml.Unmarshaler = &ParamMap{}
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func (a *ParamMap) UnmarshalYAML(value *yaml.Node) error {
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var m map[string]int
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if err := value.Decode(&m); err != nil {
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return err
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}
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// Backwards compatibility hack: if the patch was saved with an older
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// version of Sointu, it might have used the negbandpass and neghighpass
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// parameters, which now correspond to having bandpass as value -1 and
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// highpass as value -1.
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if n, ok := m["negbandpass"]; ok {
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m["bandpass"] = m["bandpass"] - n
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delete(m, "negbandpass")
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}
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if n, ok := m["neghighpass"]; ok {
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m["highpass"] = m["highpass"] - n
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delete(m, "neghighpass")
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}
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*a = m
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return nil
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}
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var channelNames = [...]string{"left", "right", "aux1 left", "aux1 right", "aux2 left", "aux2 right", "aux3 left", "aux3 right"}
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var noteTrackingNames = [...]string{"fixed", "pitch", "BPM"}
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var oscTypes = [...]string{"sine", "trisaw", "pulse", "gate", "sample"}
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func arrDispFunc(arr []string) UnitParameterDisplayFunc {
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return func(v int) (string, string) {
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if v < 0 || v >= len(arr) {
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return "???", ""
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}
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return arr[v], ""
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}
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}
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func filterFrequencyDispFunc(v int) (string, string) {
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// Matlab was used to find the frequency for the singularity when r = 0:
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// % p is the frequency parameter squared, p = freq * freq
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// % We assume the singular case r = 0.
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// syms p z s T
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// A = [1 p;-p 1-p*p]; % discrete state-space matrix x(k+1)=A*x(k) + ...
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// pol = det(z*eye(2)-A) % characteristic discrete polynomial
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// spol = simplify(subs(pol,z,(1+s*T/2)/(1-s*T/2))) % Tustin approximation
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// % where T = 1/(44100 Hz) is the sample period
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// % spol is of the form N(s)/D(s), where N(s)=(-T^2*p^2*s^2+4*T^2*s^2+4*p^2)
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// % We are interested in the roots i.e. when spol == 0 <=> N(s)==0
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// simplify(solve((-T^2*p^2*s^2+4*T^2*s^2+4*p^2)==0,s))
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// % Answer: s=±2*p/(T*(p^2-4)^(1/2)). For small p, this simplifies to:
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// % s=±p*j/T. Thus, s=j*omega=j*2*pi*f => f=±p/(2*pi*T).
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// So the singularity is when f = p / (2*pi*T) Hz.
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freq := float64(v) / 128
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p := freq * freq
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f := 44100 * p / math.Pi / 2
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return strconv.FormatFloat(f, 'f', 0, 64), "Hz"
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}
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func compressorTimeDispFunc(v int) (string, string) {
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alpha := math.Pow(2, -24*float64(v)/128) // alpha is the "smoothing factor" of first order low pass iir
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sec := -1 / (44100 * math.Log(1-alpha)) // from smoothing factor to time constant, https://en.wikipedia.org/wiki/Exponential_smoothing
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return engineeringTime(sec)
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}
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func oscillatorTransposeDispFunc(v int) (string, string) {
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relvalue := v - 64
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if relvalue%12 == 0 {
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return strconv.Itoa(relvalue / 12), "oct"
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}
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return strconv.Itoa(relvalue), "st"
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}
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func sendVoiceDispFunc(v int) (string, string) {
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if v == 0 {
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return "default", ""
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}
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return strconv.Itoa(v), ""
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}
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func engineeringTime(sec float64) (string, string) {
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if sec < 1e-3 {
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return fmt.Sprintf("%.2f", sec*1e6), "us"
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} else if sec < 1 {
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return fmt.Sprintf("%.2f", sec*1e3), "ms"
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}
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return fmt.Sprintf("%.2f", sec), "s"
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}
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func formatFloat(f float64) string {
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return strconv.FormatFloat(f, 'f', -1, 64)
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}
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func toDecibel(amplitude float64) float64 {
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if amplitude <= 0 {
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return math.Inf(-1)
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}
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// Decibels are defined as 20 * log10(amplitude)
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// https://en.wikipedia.org/wiki/Decibel#Sound_pressure
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return 20 * math.Log10(amplitude)
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}
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// When unit.Type = "oscillator", its unit.Parameter["Type"] tells the type of
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// the oscillator. There is five different oscillator types, so these consts
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// just enumerate them.
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const (
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Sine = iota
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Trisaw = iota
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Pulse = iota
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Gate = iota
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Sample = iota
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)
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|
// UnitNames is a list of all the names of units, sorted
|
|
// alphabetically.
|
|
var UnitNames []string
|
|
|
|
func init() {
|
|
UnitNames = make([]string, 0, len(UnitTypes))
|
|
for k := range UnitTypes {
|
|
UnitNames = append(UnitNames, k)
|
|
}
|
|
sort.Strings(UnitNames)
|
|
}
|
|
|
|
// Ports is static map allowing quickly finding the parameters of a unit that
|
|
// can be modulated. This is populated based on the UnitTypes list during
|
|
// init(). Thus, should be immutable, but Go not supporting that, then this will
|
|
// have to suffice: DO NOT EVER CHANGE THIS MAP.
|
|
var Ports = make(map[string]([]string))
|
|
|
|
func init() {
|
|
for name, unitType := range UnitTypes {
|
|
unitPorts := make([]string, 0)
|
|
for _, param := range unitType {
|
|
if param.CanModulate {
|
|
unitPorts = append(unitPorts, param.Name)
|
|
}
|
|
}
|
|
Ports[name] = unitPorts
|
|
}
|
|
}
|
|
|
|
// Copy makes a deep copy of a unit.
|
|
func (u *Unit) Copy() Unit {
|
|
parameters := make(map[string]int)
|
|
for k, v := range u.Parameters {
|
|
parameters[k] = v
|
|
}
|
|
varArgs := make([]int, len(u.VarArgs))
|
|
copy(varArgs, u.VarArgs)
|
|
return Unit{Type: u.Type, Parameters: parameters, VarArgs: varArgs, ID: u.ID, Disabled: u.Disabled, Comment: u.Comment}
|
|
}
|
|
|
|
var stackUseSource = [2]StackUse{
|
|
{Inputs: [][]int{}, Modifies: []bool{true}, NumOutputs: 1}, // mono
|
|
{Inputs: [][]int{}, Modifies: []bool{true, true}, NumOutputs: 2}, // stereo
|
|
}
|
|
var stackUseSink = [2]StackUse{
|
|
{Inputs: [][]int{{0}}, Modifies: []bool{true}, NumOutputs: 0}, // mono
|
|
{Inputs: [][]int{{0}, {1}}, Modifies: []bool{true, true}, NumOutputs: 0}, // stereo
|
|
}
|
|
var stackUseEffect = [2]StackUse{
|
|
{Inputs: [][]int{{0}}, Modifies: []bool{true}, NumOutputs: 1}, // mono
|
|
{Inputs: [][]int{{0}, {1}}, Modifies: []bool{true, true}, NumOutputs: 2}, // stereo
|
|
}
|
|
var stackUseMonoStereo = map[string][2]StackUse{
|
|
"add": {
|
|
{Inputs: [][]int{{0, 1}, {1}}, Modifies: []bool{false, true}, NumOutputs: 2},
|
|
{Inputs: [][]int{{0, 2}, {1, 3}, {2}, {3}}, Modifies: []bool{false, false, true, true}, NumOutputs: 4},
|
|
},
|
|
"mul": {
|
|
{Inputs: [][]int{{0, 1}, {1}}, Modifies: []bool{false, true}, NumOutputs: 2},
|
|
{Inputs: [][]int{{0, 2}, {1, 3}, {2}, {3}}, Modifies: []bool{false, false, true, true}, NumOutputs: 4},
|
|
},
|
|
"addp": {
|
|
{Inputs: [][]int{{0}, {0}}, Modifies: []bool{true}, NumOutputs: 1},
|
|
{Inputs: [][]int{{0}, {1}, {0}, {1}}, Modifies: []bool{true, true}, NumOutputs: 2},
|
|
},
|
|
"mulp": {
|
|
{Inputs: [][]int{{0}, {0}}, Modifies: []bool{true}, NumOutputs: 1},
|
|
{Inputs: [][]int{{0}, {1}, {0}, {1}}, Modifies: []bool{true, true}, NumOutputs: 2},
|
|
},
|
|
"xch": {
|
|
{Inputs: [][]int{{1}, {0}}, Modifies: []bool{false, false}, NumOutputs: 2},
|
|
{Inputs: [][]int{{2}, {3}, {0}, {1}}, Modifies: []bool{false, false, false, false}, NumOutputs: 4},
|
|
},
|
|
"push": {
|
|
{Inputs: [][]int{{0, 1}}, Modifies: []bool{false, false}, NumOutputs: 2},
|
|
{Inputs: [][]int{{0, 2}, {1, 3}}, Modifies: []bool{false, false, false, false}, NumOutputs: 4},
|
|
},
|
|
"pop": stackUseSink,
|
|
"envelope": stackUseSource,
|
|
"oscillator": stackUseSource,
|
|
"noise": stackUseSource,
|
|
"loadnote": stackUseSource,
|
|
"loadval": stackUseSource,
|
|
"receive": stackUseSource,
|
|
"in": stackUseSource,
|
|
"out": stackUseSink,
|
|
"outaux": stackUseSink,
|
|
"aux": stackUseSink,
|
|
"distort": stackUseEffect,
|
|
"hold": stackUseEffect,
|
|
"crush": stackUseEffect,
|
|
"gain": stackUseEffect,
|
|
"invgain": stackUseEffect,
|
|
"dbgain": stackUseEffect,
|
|
"filter": stackUseEffect,
|
|
"clip": stackUseEffect,
|
|
"delay": stackUseEffect,
|
|
"compressor": {
|
|
{Inputs: [][]int{{0, 1}}, Modifies: []bool{false, true}, NumOutputs: 2}, // mono
|
|
{Inputs: [][]int{{0, 2, 3}, {1, 2, 3}}, Modifies: []bool{false, false, true, true}, NumOutputs: 4}, // stereo
|
|
},
|
|
"pan": {
|
|
{Inputs: [][]int{{0, 1}}, Modifies: []bool{true, true}, NumOutputs: 2}, // mono
|
|
{Inputs: [][]int{{0}, {1}}, Modifies: []bool{true, true}, NumOutputs: 2}, // mono
|
|
},
|
|
"speed": {
|
|
{Inputs: [][]int{{0}}, Modifies: []bool{true}, NumOutputs: 0},
|
|
{},
|
|
},
|
|
"sync": {
|
|
{Inputs: [][]int{{0}}, Modifies: []bool{false}, NumOutputs: 0},
|
|
{},
|
|
},
|
|
}
|
|
var stackUseSendNoPop = [2]StackUse{
|
|
{Inputs: [][]int{{0}}, Modifies: []bool{true}, NumOutputs: 1},
|
|
{Inputs: [][]int{{0}, {1}}, Modifies: []bool{true, true}, NumOutputs: 2},
|
|
}
|
|
var stackUseSendPop = [2]StackUse{
|
|
{Inputs: [][]int{{0}}, Modifies: []bool{true}, NumOutputs: 0}, // mono
|
|
{Inputs: [][]int{{0}, {1}}, Modifies: []bool{true, true}, NumOutputs: 0}, // stereo
|
|
}
|
|
|
|
func (u *Unit) StackUse() StackUse {
|
|
if u.Disabled {
|
|
return StackUse{}
|
|
}
|
|
if u.Type == "send" {
|
|
// "send" unit is special, it has a different stack use depending on sendpop
|
|
if u.Parameters["sendpop"] == 0 {
|
|
return stackUseSendNoPop[u.Parameters["stereo"]]
|
|
}
|
|
return stackUseSendPop[u.Parameters["stereo"]]
|
|
}
|
|
return stackUseMonoStereo[u.Type][u.Parameters["stereo"]]
|
|
}
|
|
|
|
// StackChange returns how this unit will affect the signal stack. "pop" and
|
|
// "addp" and such will consume the topmost signal, and thus return -1 (or -2,
|
|
// if the unit is a stereo unit). On the other hand, "oscillator" and "envelope"
|
|
// will produce a signal, and thus return 1 (or 2, if the unit is a stereo
|
|
// unit). Effects that just change the topmost signal and will not change the
|
|
// number of signals on the stack and thus return 0.
|
|
func (u *Unit) StackChange() int {
|
|
s := u.StackUse()
|
|
return s.NumOutputs - len(s.Inputs)
|
|
}
|
|
|
|
// StackNeed returns the number of signals that should be on the stack before
|
|
// this unit is executed. Used to prevent stack underflow. Units producing
|
|
// signals do not care what is on the stack before and will return 0.
|
|
func (u *Unit) StackNeed() int {
|
|
return len(u.StackUse().Inputs)
|
|
}
|
|
|
|
// Copy makes a deep copy of an Instrument
|
|
func (instr *Instrument) Copy() Instrument {
|
|
units := make([]Unit, len(instr.Units))
|
|
for i, u := range instr.Units {
|
|
units[i] = u.Copy()
|
|
}
|
|
return Instrument{Name: instr.Name, Comment: instr.Comment, NumVoices: instr.NumVoices, Units: units, Mute: instr.Mute}
|
|
}
|
|
|
|
// Implement the counter interface
|
|
func (i *Instrument) GetNumVoices() int {
|
|
return i.NumVoices
|
|
}
|
|
|
|
func (i *Instrument) SetNumVoices(count int) {
|
|
i.NumVoices = count
|
|
}
|
|
|
|
// Copy makes a deep copy of a Patch.
|
|
func (p Patch) Copy() Patch {
|
|
instruments := make([]Instrument, len(p))
|
|
for i, instr := range p {
|
|
instruments[i] = instr.Copy()
|
|
}
|
|
return instruments
|
|
}
|
|
|
|
// NumVoices returns the total number of voices used in the patch; summing the
|
|
// voices of every instrument
|
|
func (p Patch) NumVoices() int {
|
|
ret := 0
|
|
for _, i := range p {
|
|
ret += i.NumVoices
|
|
}
|
|
return ret
|
|
}
|
|
|
|
// NumDelayLines return the total number of delay lines used in the patch;
|
|
// summing the number of delay lines of every delay unit in every instrument
|
|
func (p Patch) NumDelayLines() int {
|
|
total := 0
|
|
for _, instr := range p {
|
|
for _, unit := range instr.Units {
|
|
if unit.Type == "delay" {
|
|
total += len(unit.VarArgs) * instr.NumVoices
|
|
}
|
|
}
|
|
}
|
|
return total
|
|
}
|
|
|
|
// NumSyns return the total number of sync outputs used in the patch; summing
|
|
// the number of sync outputs of every sync unit in every instrument
|
|
func (p Patch) NumSyncs() int {
|
|
total := 0
|
|
for _, instr := range p {
|
|
for _, unit := range instr.Units {
|
|
if unit.Type == "sync" {
|
|
total += instr.NumVoices
|
|
}
|
|
}
|
|
}
|
|
return total
|
|
}
|
|
|
|
// FirstVoiceForInstrument returns the index of the first voice of given
|
|
// instrument. For example, if the Patch has three instruments (0, 1 and 2),
|
|
// with 1, 3, 2 voices, respectively, then FirstVoiceForInstrument(0) returns 0,
|
|
// FirstVoiceForInstrument(1) returns 1 and FirstVoiceForInstrument(2) returns
|
|
// 4. Essentially computes just the cumulative sum.
|
|
func (p Patch) FirstVoiceForInstrument(instrIndex int) int {
|
|
if instrIndex < 0 {
|
|
return 0
|
|
}
|
|
instrIndex = min(instrIndex, len(p))
|
|
ret := 0
|
|
for i := 0; i < instrIndex; i++ {
|
|
ret += p[i].NumVoices
|
|
}
|
|
return ret
|
|
}
|
|
|
|
// InstrumentForVoice returns the instrument number for the given voice index.
|
|
// For example, if the Patch has three instruments (0, 1 and 2), with 1, 3, 2
|
|
// voices, respectively, then InstrumentForVoice(0) returns 0,
|
|
// InstrumentForVoice(1) returns 1 and InstrumentForVoice(3) returns 1.
|
|
func (p Patch) InstrumentForVoice(voice int) (int, error) {
|
|
if voice < 0 {
|
|
return 0, errors.New("voice cannot be negative")
|
|
}
|
|
for i, instr := range p {
|
|
if voice < instr.NumVoices {
|
|
return i, nil
|
|
}
|
|
voice -= instr.NumVoices
|
|
}
|
|
return 0, errors.New("voice number is beyond the total voices of an instrument")
|
|
}
|
|
|
|
// FindUnit searches the instrument index and unit index for a unit with the
|
|
// given id. Two units should never have the same id, but if they do, then the
|
|
// first match is returned. Id 0 is interpreted as "no id", thus searching for
|
|
// id 0 returns an error. Error is also returned if the searched id is not
|
|
// found. FindUnit considers disabled units as non-existent.
|
|
func (p Patch) FindUnit(id int) (instrIndex int, unitIndex int, err error) {
|
|
if id == 0 {
|
|
return 0, 0, errors.New("FindUnit called with id 0")
|
|
}
|
|
for i, instr := range p {
|
|
for u, unit := range instr.Units {
|
|
if unit.ID == id && !unit.Disabled {
|
|
return i, u, nil
|
|
}
|
|
}
|
|
}
|
|
return 0, 0, fmt.Errorf("could not find a unit with id %v", id)
|
|
}
|
|
|
|
func FindParamForModulationPort(unitName string, index int) (up UnitParameter, upIndex int, ok bool) {
|
|
unitType, ok := UnitTypes[unitName]
|
|
if !ok {
|
|
return UnitParameter{}, 0, false
|
|
}
|
|
for i, param := range unitType {
|
|
if !param.CanModulate {
|
|
continue
|
|
}
|
|
if index == 0 {
|
|
return param, i, true
|
|
}
|
|
index--
|
|
}
|
|
return UnitParameter{}, 0, false
|
|
}
|