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c09a3f04db
135
patch.go
135
patch.go
@ -67,6 +67,13 @@ type (
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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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@ -304,6 +311,103 @@ func (u *Unit) Copy() Unit {
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return Unit{Type: u.Type, Parameters: parameters, VarArgs: varArgs, ID: u.ID, Disabled: u.Disabled, Comment: u.Comment}
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}
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var stackUseSource = [2]StackUse{
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{Inputs: [][]int{}, Modifies: []bool{true}, NumOutputs: 1}, // mono
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{Inputs: [][]int{}, Modifies: []bool{true, true}, NumOutputs: 2}, // stereo
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}
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var stackUseSink = [2]StackUse{
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{Inputs: [][]int{{0}}, Modifies: []bool{true}, NumOutputs: 0}, // mono
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{Inputs: [][]int{{0}, {1}}, Modifies: []bool{true, true}, NumOutputs: 0}, // stereo
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}
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var stackUseEffect = [2]StackUse{
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{Inputs: [][]int{{0}}, Modifies: []bool{true}, NumOutputs: 1}, // mono
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{Inputs: [][]int{{0}, {1}}, Modifies: []bool{true, true}, NumOutputs: 2}, // stereo
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}
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var stackUseMonoStereo = map[string][2]StackUse{
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"add": {
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{Inputs: [][]int{{0, 1}, {1}}, Modifies: []bool{false, true}, NumOutputs: 2},
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{Inputs: [][]int{{0, 2}, {1, 3}, {2}, {3}}, Modifies: []bool{false, false, true, true}, NumOutputs: 4},
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},
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"mul": {
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{Inputs: [][]int{{0, 1}, {1}}, Modifies: []bool{false, true}, NumOutputs: 2},
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{Inputs: [][]int{{0, 2}, {1, 3}, {2}, {3}}, Modifies: []bool{false, false, true, true}, NumOutputs: 4},
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},
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"addp": {
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{Inputs: [][]int{{0}, {0}}, Modifies: []bool{true}, NumOutputs: 1},
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{Inputs: [][]int{{0}, {1}, {0}, {1}}, Modifies: []bool{true, true}, NumOutputs: 2},
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},
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"mulp": {
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{Inputs: [][]int{{0}, {0}}, Modifies: []bool{true}, NumOutputs: 1},
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{Inputs: [][]int{{0}, {1}, {0}, {1}}, Modifies: []bool{true, true}, NumOutputs: 2},
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},
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"xch": {
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{Inputs: [][]int{{1}, {0}}, Modifies: []bool{false, false}, NumOutputs: 2},
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{Inputs: [][]int{{2}, {3}, {0}, {1}}, Modifies: []bool{false, false, false, false}, NumOutputs: 4},
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},
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"push": {
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{Inputs: [][]int{{0, 1}}, Modifies: []bool{false, false}, NumOutputs: 2},
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{Inputs: [][]int{{0, 2}, {1, 3}}, Modifies: []bool{false, false, false, false}, NumOutputs: 4},
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},
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"pop": stackUseSink,
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"envelope": stackUseSource,
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"oscillator": stackUseSource,
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"noise": stackUseSource,
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"loadnote": stackUseSource,
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"loadval": stackUseSource,
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"receive": stackUseSource,
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"in": stackUseSource,
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"out": stackUseSink,
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"outaux": stackUseSink,
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"aux": stackUseSink,
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"distort": stackUseEffect,
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"hold": stackUseEffect,
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"crush": stackUseEffect,
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"gain": stackUseEffect,
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"invgain": stackUseEffect,
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"dbgain": stackUseEffect,
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"filter": stackUseEffect,
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"clip": stackUseEffect,
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"delay": stackUseEffect,
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"compressor": {
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{Inputs: [][]int{{0, 1}}, Modifies: []bool{false, true}, NumOutputs: 2}, // mono
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{Inputs: [][]int{{0, 2, 3}, {1, 2, 3}}, Modifies: []bool{false, false, true, true}, NumOutputs: 4}, // stereo
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},
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"pan": {
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{Inputs: [][]int{{0, 1}}, Modifies: []bool{true, true}, NumOutputs: 2}, // mono
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{Inputs: [][]int{{0, 1}, {0, 1}}, Modifies: []bool{true, true}, NumOutputs: 2}, // mono
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},
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"speed": {
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{Inputs: [][]int{{0}}, Modifies: []bool{true}, NumOutputs: 0},
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{},
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},
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"sync": {
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{Inputs: [][]int{{0}}, Modifies: []bool{false}, NumOutputs: 0},
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{},
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},
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}
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var stackUseSendNoPop = [2]StackUse{
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{Inputs: [][]int{{0}}, Modifies: []bool{false}, NumOutputs: 1},
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{Inputs: [][]int{{0}, {1}}, Modifies: []bool{false, false}, NumOutputs: 2},
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}
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var stackUseSendPop = [2]StackUse{
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{Inputs: [][]int{{0}}, Modifies: []bool{true}, NumOutputs: 0}, // mono
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{Inputs: [][]int{{0}, {1}}, Modifies: []bool{true, true}, NumOutputs: 0}, // stereo
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}
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func (u *Unit) StackUse() StackUse {
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if u.Disabled {
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return StackUse{}
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}
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if u.Type == "send" {
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// "send" unit is special, it has a different stack use depending on sendpop
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if u.Parameters["sendpop"] == 0 {
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return stackUseSendNoPop[u.Parameters["stereo"]]
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}
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return stackUseSendPop[u.Parameters["stereo"]]
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}
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return stackUseMonoStereo[u.Type][u.Parameters["stereo"]]
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}
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// StackChange returns how this unit will affect the signal stack. "pop" and
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// "addp" and such will consume the topmost signal, and thus return -1 (or -2,
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// if the unit is a stereo unit). On the other hand, "oscillator" and "envelope"
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@ -311,40 +415,15 @@ func (u *Unit) Copy() Unit {
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// unit). Effects that just change the topmost signal and will not change the
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// number of signals on the stack and thus return 0.
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func (u *Unit) StackChange() int {
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if u.Disabled {
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return 0
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}
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switch u.Type {
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case "addp", "mulp", "pop", "out", "outaux", "aux":
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return -1 - u.Parameters["stereo"]
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case "envelope", "oscillator", "push", "noise", "receive", "loadnote", "loadval", "in", "compressor":
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return 1 + u.Parameters["stereo"]
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case "pan":
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return 1 - u.Parameters["stereo"]
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case "speed":
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return -1
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case "send":
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return (-1 - u.Parameters["stereo"]) * u.Parameters["sendpop"]
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}
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return 0
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s := u.StackUse()
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return s.NumOutputs - len(s.Inputs)
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}
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// StackNeed returns the number of signals that should be on the stack before
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// this unit is executed. Used to prevent stack underflow. Units producing
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// signals do not care what is on the stack before and will return 0.
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func (u *Unit) StackNeed() int {
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if u.Disabled {
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return 0
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}
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switch u.Type {
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case "", "envelope", "oscillator", "noise", "receive", "loadnote", "loadval", "in":
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return 0
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case "mulp", "mul", "add", "addp", "xch":
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return 2 * (1 + u.Parameters["stereo"])
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case "speed":
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return 1
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}
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return 1 + u.Parameters["stereo"]
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return len(u.StackUse().Inputs)
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}
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// Copy makes a deep copy of an Instrument
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