mirror of
https://github.com/vsariola/sointu.git
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Change bridge.go so that there is just SetPatch(...) function, instead of having to SetCommands, SetValues etc.
Now the patch definition in bridge_test.go and test_envelope.asm appear quite similar, so it's clear how they are related.
This commit is contained in:
Veikko Sariola
202
bridge/bridge.go
202
bridge/bridge.go
@ -1,58 +1,74 @@
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package bridge
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import "fmt"
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import "unsafe"
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import "math"
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import (
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"errors"
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"math"
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)
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// #cgo CFLAGS: -I"${SRCDIR}/../include"
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// #cgo LDFLAGS: "${SRCDIR}/../build/src/libsointu.a"
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// #include <sointu.h>
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import "C"
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import "errors"
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type SynthState = C.SynthState
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// SynthState contains the entire state of sointu sound engine
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type SynthState C.SynthState // hide C.Synthstate, explicit cast is still possible if needed
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// Opcode is a single byte, representing the virtual machine commands used in Sointu
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type Opcode byte
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var ( // cannot be const as the rhs are not known at compile-time
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Add = Opcode(C.su_add_id)
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Addp = Opcode(C.su_addp_id)
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Pop = Opcode(C.su_pop_id)
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Loadnote = Opcode(C.su_loadnote_id)
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Mul = Opcode(C.su_mul_id)
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Mulp = Opcode(C.su_mulp_id)
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Push = Opcode(C.su_push_id)
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Xch = Opcode(C.su_xch_id)
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Distort = Opcode(C.su_distort_id)
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Hold = Opcode(C.su_hold_id)
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Crush = Opcode(C.su_crush_id)
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Gain = Opcode(C.su_gain_id)
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Invgain = Opcode(C.su_invgain_id)
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Filter = Opcode(C.su_filter_id)
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Clip = Opcode(C.su_clip_id)
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Pan = Opcode(C.su_pan_id)
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Delay = Opcode(C.su_delay_id)
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Compres = Opcode(C.su_compres_id)
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Advance = Opcode(C.su_advance_id)
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Speed = Opcode(C.su_speed_id)
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Out = Opcode(C.su_out_id)
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Outaux = Opcode(C.su_outaux_id)
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Aux = Opcode(C.su_aux_id)
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Send = Opcode(C.su_send_id)
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Envelope = Opcode(C.su_envelope_id)
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Noise = Opcode(C.su_noise_id)
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Oscillat = Opcode(C.su_oscillat_id)
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Loadval = Opcode(C.su_loadval_id)
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Receive = Opcode(C.su_receive_id)
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In = Opcode(C.su_in_id)
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)
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func (o Opcode) Stereo() Opcode {
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return Opcode(byte(o) | 1) // set lowest bit
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// Unit includes command (filter, oscillator, envelope etc.) and its parameters
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type Unit struct {
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Command Opcode
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Params []byte
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}
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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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type Instrument struct {
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NumVoices int
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Units []Unit
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}
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var ( // cannot be const as the rhs are not known at compile-time
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Add = Opcode(C.su_add_id)
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Addp = Opcode(C.su_addp_id)
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Pop = Opcode(C.su_pop_id)
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Loadnote = Opcode(C.su_loadnote_id)
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Mul = Opcode(C.su_mul_id)
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Mulp = Opcode(C.su_mulp_id)
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Push = Opcode(C.su_push_id)
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Xch = Opcode(C.su_xch_id)
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Distort = Opcode(C.su_distort_id)
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Hold = Opcode(C.su_hold_id)
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Crush = Opcode(C.su_crush_id)
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Gain = Opcode(C.su_gain_id)
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Invgain = Opcode(C.su_invgain_id)
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Filter = Opcode(C.su_filter_id)
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Clip = Opcode(C.su_clip_id)
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Pan = Opcode(C.su_pan_id)
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Delay = Opcode(C.su_delay_id)
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Compres = Opcode(C.su_compres_id)
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Advance = Opcode(C.su_advance_id)
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Speed = Opcode(C.su_speed_id)
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Out = Opcode(C.su_out_id)
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Outaux = Opcode(C.su_outaux_id)
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Aux = Opcode(C.su_aux_id)
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Send = Opcode(C.su_send_id)
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Envelope = Opcode(C.su_envelope_id)
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Noise = Opcode(C.su_noise_id)
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Oscillat = Opcode(C.su_oscillat_id)
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Loadval = Opcode(C.su_loadval_id)
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Receive = Opcode(C.su_receive_id)
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In = Opcode(C.su_in_id)
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)
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// Stereo returns the stereo version of any (mono or stereo) opcode
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func (o Opcode) Stereo() Opcode {
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return Opcode(byte(o) | 1) // set lowest bit
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}
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// Mono returns the mono version of any (mono or stereo) opcode
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func (o Opcode) Mono() Opcode {
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return Opcode(byte(o) & 0xFE) // clear lowest bit
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return Opcode(byte(o) & 0xFE) // clear lowest bit
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}
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// Render tries to fill the buffer with samples rendered by Sointu.
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@ -66,53 +82,79 @@ func (o Opcode) Mono() Opcode {
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// callback called every time a row advances. Won't get called if you have
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// not set SamplesPerRow explicitly.
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// Returns the number samples rendered, len(buffer)/2 in the typical case where buffer was filled
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func (s *SynthState) Render(buffer []float32,maxRows int,callback func()) (int, error) {
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if len(buffer) % 1 == 1 {
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return -1, errors.New("Render writes stereo signals, so buffer should have even length")
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}
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maxSamples := len(buffer) / 2
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remaining := maxSamples
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for i := 0; i < maxRows; i++ {
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remaining = int(C.su_render_samples(s,C.int(remaining),(*C.float)(&buffer[2*(maxSamples-remaining)])))
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if (remaining >= 0) { // values >= 0 mean that row end was reached
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callback()
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}
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if (remaining <= 0) { // values <= 0 mean that buffer is full, ready to return
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break;
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}
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}
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return maxSamples - remaining, nil
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func (s *SynthState) Render(buffer []float32, maxRows int, callback func()) (int, error) {
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if len(buffer)%1 == 1 {
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return -1, errors.New("Render writes stereo signals, so buffer should have even length")
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}
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maxSamples := len(buffer) / 2
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remaining := maxSamples
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for i := 0; i < maxRows; i++ {
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remaining = int(C.su_render_samples((*C.SynthState)(s), C.int(remaining), (*C.float)(&buffer[2*(maxSamples-remaining)])))
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if remaining >= 0 { // values >= 0 mean that row end was reached
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callback()
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}
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if remaining <= 0 { // values <= 0 mean that buffer is full, ready to return
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break
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}
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}
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return maxSamples - remaining, nil
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}
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func (s *SynthState) SetCommands(c [2048]Opcode) {
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pk := *((*[2048]C.uchar)(unsafe.Pointer(&c)))
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s.Commands = pk
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func (s *SynthState) SetPatch(patch []Instrument) error {
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totalVoices := 0
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commands := make([]Opcode, 0)
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values := make([]byte, 0)
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for _, instr := range patch {
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if len(instr.Units) > 63 {
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return errors.New("An instrument can have a maximum of 63 units")
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}
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if instr.NumVoices < 1 {
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return errors.New("Each instrument must have at least 1 voice")
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}
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for _, unit := range instr.Units {
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commands = append(commands, unit.Command)
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values = append(values, unit.Params...)
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}
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commands = append(commands, Advance)
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totalVoices += instr.NumVoices
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}
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if totalVoices > 32 {
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return errors.New("Sointu does not support more than 32 concurrent voices")
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}
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if len(commands) > 2048 { // TODO: 2048 could probably be pulled automatically from cgo
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return errors.New("The patch would result in more than 2048 commands")
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}
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if len(values) > 16384 { // TODO: 16384 could probably be pulled automatically from cgo
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return errors.New("The patch would result in more than 16384 values")
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}
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cs := (*C.SynthState)(s)
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for i := range commands {
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cs.Commands[i] = (C.uchar)(commands[i])
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}
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for i := range values {
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cs.Values[i] = (C.uchar)(values[i])
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}
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cs.NumVoices = C.uint(totalVoices)
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return nil
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}
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func (s *SynthState) SetValues(c [16384]byte) {
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pk := *((*[16384]C.uchar)(unsafe.Pointer(&c)))
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s.Values = pk
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}
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func (s *SynthState) Trigger(voice int,note int) {
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fmt.Printf("Calling Trigger...\n")
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s.Synth.Voices[voice] = C.Voice{}
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s.Synth.Voices[voice].Note = C.int(note)
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fmt.Printf("Returning from Trigger...\n")
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func (s *SynthState) Trigger(voice int, note int) {
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cs := (*C.SynthState)(s)
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cs.Synth.Voices[voice] = C.Voice{}
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cs.Synth.Voices[voice].Note = C.int(note)
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}
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func (s *SynthState) Release(voice int) {
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fmt.Printf("Calling Release...\n")
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s.Synth.Voices[voice].Release = 1
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fmt.Printf("Returning from Release...\n")
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cs := (*C.SynthState)(s)
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cs.Synth.Voices[voice].Release = 1
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}
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func NewSynthState() *SynthState {
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s := new(SynthState)
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s.RandSeed = 1
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// The default behaviour will be to have rows/beats disabled i.e.
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// fill the whole buffer every call. This is a lot better default
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// behaviour than leaving this 0 (Render would never render anything)
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s.SamplesPerRow = math.MaxInt32
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return s
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s := new(SynthState)
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s.RandSeed = 1
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// The default behaviour will be to have rows/beats disabled i.e.
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// fill the whole buffer every call. This is a lot better default
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// behaviour than leaving this 0 (Render would never render anything)
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s.SamplesPerRow = math.MaxInt32
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return s
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}
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