WGPU is coming

2026-09-07 17:18:03 +03:00
commit f48195a8bf
19 changed files with 2230 additions and 0 deletions
@@ -0,0 +1,111 @@
+// MXL Flow Definition helper
+package flowdef
+
+import (
+	"encoding/json"
+	"errors"
+)
+
+const (
+	TYPE_VIDEO = iota
+	TYPE_VIDEO_ALPHA
+	TYPE_AUDIO
+)
+
+var (
+	ErrUnknownFlowType   = errors.New("Unknown flow type provided")
+	ErrIncorrectFlowUUID = errors.New("Incorrect flow uuid")
+)
+
+type flowDef struct {
+	Description   string              `json:"description"`
+	Id            string              `json:"id"`
+	Tags          map[string][]string `json:"tags"`
+	Format        string              `json:"format"`
+	Label         string              `json:"label"`
+	Parents       []string            `json:"parents"`
+	MediaType     string              `json:"media_type"`
+	GrainRate     grainRate           `json:"grain_rate"`
+	FrameWidth    uint                `json:"frame_width"`
+	FrameHeight   uint                `json:"frame_height"`
+	InterlaceMode string              `json:"interlace_mode"`
+	ColorSpace    string              `json:"colorspace"`
+	Components    [3]videoComponent   `json:"components"`
+}
+
+type grainRate struct {
+	Numerator   uint `json:"numerator"`
+	Denominator uint `json:"denominator"`
+}
+
+type videoComponent struct {
+	Name     string `json:"name"`
+	Width    uint   `json:"width"`
+	Height   uint   `json:"height"`
+	BitDepth uint   `json:"bit_depth"`
+}
+
+func NewFlowDefJSON(
+	feedType int,
+	uuid string,
+	width uint,
+	height uint,
+	fpsNum uint,
+	fpsDen uint,
+) (string, error) {
+	if feedType != TYPE_VIDEO &&
+		feedType != TYPE_VIDEO_ALPHA &&
+		feedType != TYPE_AUDIO {
+		return "", ErrUnknownFlowType
+	}
+	if uuid == "" {
+		return "", ErrIncorrectFlowUUID
+	}
+	tags := map[string][]string{
+		"urn:x-nmos:tag:grouphint/v1.0": {
+			"___one day I will follow NMOS specs___:Video",
+		},
+	}
+	flowDef := flowDef{
+		Description: "go-mxl-pattern-gen generated feed",
+		Id:          uuid,
+		Tags:        tags,
+		Format:      "urn:x-nmos:format:video",
+		Label:       "go-mxl-pattern-gen generated feed",
+		Parents:     nil,
+		MediaType:   "video/v210",
+		GrainRate: grainRate{
+			Numerator:   fpsNum,
+			Denominator: fpsDen,
+		},
+		FrameWidth:    width,
+		FrameHeight:   height,
+		InterlaceMode: "progressive",
+		ColorSpace:    "BT709",
+		Components: [3]videoComponent{
+			videoComponent{
+				Name:     "Y",
+				Width:    width,
+				Height:   height,
+				BitDepth: 10,
+			},
+			videoComponent{
+				Name:     "Cb",
+				Width:    width / 2,
+				Height:   height,
+				BitDepth: 10,
+			},
+			videoComponent{
+				Name:     "Cr",
+				Width:    width / 2,
+				Height:   height,
+				BitDepth: 10,
+			},
+		},
+	}
+	jsonBytes, err := json.Marshal(flowDef)
+	if err != nil {
+		return "", err
+	}
+	return string(jsonBytes), nil
+}