audio integration to main

cmd/mxl-pattern/main.go

@@ -20,6 +20,7 @@ import (
 	"github.com/qvest-digital/go-mxl/mxl"
 	"github.com/spf13/pflag"
 
+	"mxl-pattern-generator/internal/audio"
 	"mxl-pattern-generator/internal/flowdef"
 	"mxl-pattern-generator/internal/generator"
 	"mxl-pattern-generator/internal/video"
@@ -418,6 +419,42 @@ func buildVideoConfig(args appArgs) (video.Config, error) {
 	}, nil
 }
 
+// buildAudioConfig returns nil when audio is disabled. An explicit audio flow
+// definition enables audio even when --channel is zero.
+func buildAudioConfig(args appArgs) (*audio.Config, error) {
+	if args.audioFlowDefFile == "" && args.audioChannels == 0 {
+		return nil, nil
+	}
+
+	var definition flowdef.Audio
+	if args.audioFlowDefFile != "" {
+		data, err := os.ReadFile(args.audioFlowDefFile)
+		if err != nil {
+			return nil, fmt.Errorf("read audio flow definition %q: %w", args.audioFlowDefFile, err)
+		}
+		definition, err = flowdef.ParseFloat32Audio(data)
+		if err != nil {
+			return nil, fmt.Errorf("parse audio flow definition %q: %w", args.audioFlowDefFile, err)
+		}
+	} else {
+		rate, ok := samplingRates[args.audioSamplingFreq]
+		if !ok {
+			return nil, fmt.Errorf("unsupported audio sample rate %q", args.audioSamplingFreq)
+		}
+		var err error
+		definition, err = flowdef.NewFloat32Audio(
+			args.audioUUID,
+			uint(args.audioChannels),
+			flowdef.Rational{Numerator: uint(rate.Num), Denominator: uint(rate.Den)},
+		)
+		if err != nil {
+			return nil, fmt.Errorf("build audio flow definition: %w", err)
+		}
+	}
+
+	return &audio.Config{Definition: definition}, nil
+}
+
 func main() {
 	parsed, err := parseArgs(os.Args[1:], os.Stdout, os.Stderr)
 	if err != nil {