{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://effetune.frieve.com/dsp/schemas/bundle-v1.schema.json",
  "title": "EffeTune DSP Bundle v1",
  "description": "Manifest form for a canonical chain and bounded external impulse-response assets. Container and transport are outside this schema.",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "version",
    "chain",
    "assets"
  ],
  "properties": {
    "version": {
      "type": "integer",
      "const": 1
    },
    "chain": {
      "$ref": "https://effetune.frieve.com/dsp/schemas/chain-v1.schema.json"
    },
    "assets": {
      "type": "array",
      "maxItems": 64,
      "items": {
        "$ref": "#/$defs/asset"
      }
    }
  },
  "$comment": "Duplicate asset IDs, missing chain references, digest verification, and byteLength === 32 + pathCount*12 + channels*frames*4 are runtime validation responsibilities.",
  "$defs": {
    "asset": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "id",
        "kind",
        "reference",
        "sha256",
        "byteLength",
        "format"
      ],
      "properties": {
        "id": {
          "type": "string",
          "minLength": 1,
          "maxLength": 128
        },
        "kind": {
          "const": "impulseResponse"
        },
        "reference": {
          "type": "string",
          "minLength": 1,
          "maxLength": 2048,
          "description": "Opaque resolver reference. The bundle schema does not require ZIP or filesystem paths."
        },
        "sha256": {
          "type": "string",
          "pattern": "^[0-9a-f]{64}$"
        },
        "byteLength": {
          "type": "integer",
          "minimum": 36,
          "maximum": 33554432
        },
        "format": {
          "type": "object",
          "additionalProperties": false,
          "required": [
            "formatTag",
            "magic",
            "headerBytes",
            "pathRecordBytes",
            "sampleType",
            "byteOrder",
            "layout",
            "channels",
            "frames",
            "sampleRate",
            "topology",
            "pathCount",
            "reservedBytes"
          ],
          "properties": {
            "formatTag": {
              "type": "integer",
              "const": 1,
              "description": "ET_ASSET_F32_MULTICH format tag."
            },
            "magic": {
              "const": "ETA1",
              "description": "ASCII bytes stored at payload offsets 0..3."
            },
            "headerBytes": {
              "type": "integer",
              "const": 32
            },
            "pathRecordBytes": {
              "type": "integer",
              "const": 12
            },
            "reservedBytes": {
              "type": "integer",
              "const": 8,
              "description": "Zero-filled payload header bytes at offsets 24..31."
            },
            "sampleType": {
              "const": "float32"
            },
            "byteOrder": {
              "const": "little-endian"
            },
            "layout": {
              "const": "planar"
            },
            "channels": {
              "type": "integer",
              "minimum": 1,
              "maximum": 8
            },
            "frames": {
              "type": "integer",
              "minimum": 1,
              "maximum": 8388600
            },
            "sampleRate": {
              "type": "integer",
              "minimum": 1,
              "maximum": 4294967295
            },
            "topology": {
              "type": "string",
              "enum": [
                "unspecified",
                "mono",
                "independent",
                "trueStereo",
                "matrix"
              ],
              "description": "Decoded uint32 header tag: unspecified=0, mono=1, independent=2, trueStereo=3, matrix=4."
            },
            "pathCount": {
              "type": "integer",
              "minimum": 0,
              "maximum": 8
            },
            "paths": {
              "type": "array",
              "minItems": 1,
              "maxItems": 8,
              "description": "Matrix routes. Distinct inputSlot values must be exactly 0..N-1, and N must not exceed the selected effect processing-channel count.",
              "items": {
                "type": "object",
                "additionalProperties": false,
                "required": [
                  "inputSlot",
                  "outputSlot",
                  "irChannel"
                ],
                "properties": {
                  "inputSlot": {
                    "type": "integer",
                    "minimum": 0,
                    "maximum": 7,
                    "description": "Zero-based matrix input; the set of input slots must be contiguous from 0."
                  },
                  "outputSlot": {
                    "type": "integer",
                    "minimum": 0,
                    "maximum": 7
                  },
                  "irChannel": {
                    "type": "integer",
                    "minimum": 0,
                    "maximum": 7
                  }
                }
              }
            }
          },
          "allOf": [
            {
              "if": {
                "properties": {
                  "topology": {
                    "const": "matrix"
                  }
                },
                "required": [
                  "topology"
                ]
              },
              "then": {
                "required": [
                  "paths"
                ],
                "properties": {
                  "pathCount": {
                    "type": "integer",
                    "minimum": 1,
                    "maximum": 8
                  }
                }
              },
              "else": {
                "properties": {
                  "pathCount": {
                    "const": 0
                  }
                },
                "not": {
                  "required": [
                    "paths"
                  ]
                }
              }
            }
          ]
        }
      }
    }
  }
}