/
bank_definition.go
56 lines (50 loc) · 1.2 KB
/
bank_definition.go
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package instruments
import (
"errors"
"fmt"
"io/ioutil"
"strings"
"github.com/bspaans/bleep/audio"
"gopkg.in/yaml.v2"
)
type BankDef struct {
Instruments []*InstrumentDef `json:"bank" yaml:"bank"`
FromFile string `json:"-" yaml:"-"`
}
func NewBankFromYamlFile(file string) (*BankDef, error) {
contents, err := ioutil.ReadFile(file)
if err != nil {
return nil, err
}
result := BankDef{}
if err := yaml.Unmarshal(contents, &result); err != nil {
return nil, err
}
if len(result.Instruments) == 0 {
return nil, fmt.Errorf("No instruments in bank def %s", file)
}
result.FromFile = file
return &result, nil
}
func (b *BankDef) Validate(cfg *audio.AudioConfig) error {
ctx, err := NewContext(b.FromFile, cfg)
if err != nil {
return err
}
str := []string{}
for _, instr := range b.Instruments {
if err := instr.Validate(ctx); err != nil {
str = append(str, err.Error())
}
}
if len(str) == 0 {
return nil
}
return errors.New(strings.Join(str, "\n"))
}
func (b *BankDef) Activate(bank int) {
for _, instr := range b.Instruments {
fmt.Printf("Loading [%d] %s\n", instr.Index, instr.Name)
Banks[bank][instr.Index] = BankDefToBankType(instr.Generator, b.FromFile)
}
}