Add support for BPE tokenization.

Clients/Java/build.gradle.kts

@@ -35,6 +35,8 @@ dependencies {
   api("io.grpc:grpc-stub:1.54.1")
   api("io.grpc:grpc-protobuf:1.54.1")
   api("io.grpc:grpc-kotlin-stub:1.3.0")
+  implementation("com.google.protobuf:protobuf-java:3.22.3")
+
   implementation("io.grpc:grpc-netty:1.54.1")
 }
 

Clients/Java/sample/src/main/kotlin/gay/pizza/stable/diffusion/sample/main.kt

@@ -1,11 +1,7 @@
 package gay.pizza.stable.diffusion.sample
 
 import com.google.protobuf.ByteString
-import gay.pizza.stable.diffusion.StableDiffusion
-import gay.pizza.stable.diffusion.StableDiffusion.GenerateImagesRequest
-import gay.pizza.stable.diffusion.StableDiffusion.Image
-import gay.pizza.stable.diffusion.StableDiffusion.ListModelsRequest
-import gay.pizza.stable.diffusion.StableDiffusion.LoadModelRequest
+import gay.pizza.stable.diffusion.StableDiffusion.*
 import gay.pizza.stable.diffusion.StableDiffusionRpcClient
 import io.grpc.ManagedChannelBuilder
 import kotlin.io.path.Path
@@ -14,7 +10,11 @@ import kotlin.io.path.readBytes
 import kotlin.io.path.writeBytes
 import kotlin.system.exitProcess
 
-fun main() {
+fun main(args: Array<String>) {
+  val chosenModelName = if (args.isNotEmpty()) args[0] else null
+  val chosenPrompt = if (args.size >= 2) args[1] else "cat"
+  val chosenNegativePrompt = if (args.size >= 3) args[2] else "bad, nsfw, low quality"
+
   val channel = ManagedChannelBuilder
     .forAddress("127.0.0.1", 4546)
     .usePlaintext()
@@ -32,7 +32,12 @@ fun main() {
     println("  model ${model.name} attention=${model.attention} loaded=${model.isLoaded}${maybeLoadedComputeUnits}")
   }
 
-  val model = modelListResponse.availableModelsList.random()
+  val model = if (chosenModelName == null) {
+    modelListResponse.availableModelsList.random()
+  } else {
+    modelListResponse.availableModelsList.first { it.name == chosenModelName }
+  }
+
   if (!model.isLoaded) {
     println("loading model ${model.name}...")
     client.modelServiceBlocking.loadModel(LoadModelRequest.newBuilder().apply {
@@ -43,20 +48,39 @@ fun main() {
     println("using model ${model.name}...")
   }
 
+  println("tokenizing prompts...")
+
+  val tokenizePromptResponse = client.tokenizerServiceBlocking.tokenize(TokenizeRequest.newBuilder().apply {
+    modelName = model.name
+    input = chosenPrompt
+  }.build())
+  val tokenizeNegativePromptResponse = client.tokenizerServiceBlocking.tokenize(TokenizeRequest.newBuilder().apply {
+    modelName = model.name
+    input = chosenNegativePrompt
+  }.build())
+
+  println("tokenize prompt='${chosenPrompt}' " +
+    "tokens=[${tokenizePromptResponse.tokensList.joinToString(", ")}] " +
+    "token_ids=[${tokenizePromptResponse.tokenIdsList.joinToString(", ")}]")
+
+  println("tokenize negative_prompt='${chosenNegativePrompt}' " +
+    "tokens=[${tokenizeNegativePromptResponse.tokensList.joinToString(", ")}] " +
+    "token_ids=[${tokenizeNegativePromptResponse.tokenIdsList.joinToString(", ")}]")
+
   println("generating images...")
 
   val startingImagePath = Path("work/start.png")
 
   val request = GenerateImagesRequest.newBuilder().apply {
     modelName = model.name
-    outputImageFormat = StableDiffusion.ImageFormat.png
+    outputImageFormat = ImageFormat.png
     batchSize = 2
     batchCount = 2
-    prompt = "cat"
-    negativePrompt = "bad, low quality, nsfw"
+    prompt = chosenPrompt
+    negativePrompt = chosenNegativePrompt
     if (startingImagePath.exists()) {
       val image = Image.newBuilder().apply {
-        format = StableDiffusion.ImageFormat.png
+        format = ImageFormat.png
         data = ByteString.copyFrom(startingImagePath.readBytes())
       }.build()
 
@@ -65,10 +89,12 @@ fun main() {
   }.build()
   for ((updateIndex, update) in client.imageGenerationServiceBlocking.generateImagesStreaming(request).withIndex()) {
     if (update.hasBatchProgress()) {
-      println("batch ${update.currentBatch} progress ${update.batchProgress.percentageComplete}%")
+      println("batch=${update.currentBatch} " +
+        "progress=${prettyProgressValue(update.batchProgress.percentageComplete)}% " +
+        "overall=${prettyProgressValue(update.overallPercentageComplete)}%")
       for ((index, image) in update.batchProgress.imagesList.withIndex()) {
         val imageIndex = ((update.currentBatch - 1) * request.batchSize) + (index + 1)
-        println("image $imageIndex update $updateIndex format=${image.format.name} data=(${image.data.size()} bytes)")
+        println("image=$imageIndex update=$updateIndex format=${image.format.name} data=(${image.data.size()} bytes)")
         val path = Path("work/intermediate_${imageIndex}_${updateIndex}.${image.format.name}")
         path.writeBytes(image.data.toByteArray())
       }
@@ -77,13 +103,14 @@ fun main() {
     if (update.hasBatchCompleted()) {
       for ((index, image) in update.batchCompleted.imagesList.withIndex()) {
         val imageIndex = ((update.currentBatch - 1) * request.batchSize) + (index + 1)
-        println("image $imageIndex format=${image.format.name} data=(${image.data.size()} bytes)")
+        println("image=$imageIndex format=${image.format.name} data=(${image.data.size()} bytes)")
         val path = Path("work/final_${imageIndex}.${image.format.name}")
         path.writeBytes(image.data.toByteArray())
       }
     }
-    println("overall progress ${update.overallPercentageComplete}%")
   }
 
   channel.shutdownNow()
 }
+
+fun prettyProgressValue(value: Float) = String.format("%.2f", value)

Clients/Java/src/main/kotlin/gay/pizza/stable/diffusion/StableDiffusionRpcClient.kt

@@ -2,7 +2,7 @@ package gay.pizza.stable.diffusion
 
 import io.grpc.Channel
 
-@Suppress("MemberVisibilityCanBePrivate")
+@Suppress("MemberVisibilityCanBePrivate", "unused")
 class StableDiffusionRpcClient(val channel: Channel) {
   val modelService: ModelServiceGrpc.ModelServiceStub by lazy {
     ModelServiceGrpc.newStub(channel)
@@ -35,4 +35,20 @@ class StableDiffusionRpcClient(val channel: Channel) {
   val imageGenerationServiceCoroutine: ImageGenerationServiceGrpcKt.ImageGenerationServiceCoroutineStub by lazy {
     ImageGenerationServiceGrpcKt.ImageGenerationServiceCoroutineStub(channel)
   }
+
+  val tokenizerService: TokenizerServiceGrpc.TokenizerServiceStub by lazy {
+    TokenizerServiceGrpc.newStub(channel)
+  }
+
+  val tokenizerServiceBlocking: TokenizerServiceGrpc.TokenizerServiceBlockingStub by lazy {
+    TokenizerServiceGrpc.newBlockingStub(channel)
+  }
+
+  val tokenizerServiceFuture: TokenizerServiceGrpc.TokenizerServiceFutureStub by lazy {
+    TokenizerServiceGrpc.newFutureStub(channel)
+  }
+
+  val tokenizerServiceCoroutine: TokenizerServiceGrpcKt.TokenizerServiceCoroutineStub by lazy {
+    TokenizerServiceGrpcKt.TokenizerServiceCoroutineStub(channel)
+  }
 }

Common/StableDiffusion.proto

@@ -350,3 +350,43 @@ service ImageGenerationService {
      */
     rpc GenerateImagesStreaming(GenerateImagesRequest) returns (stream GenerateImagesStreamUpdate);
 }
+
+/**
+ * Represents a request to tokenize an input.
+ */
+message TokenizeRequest {
+    /**
+     * The name of a loaded model to use for tokenization.
+     */
+    string model_name = 1;
+
+    /**
+     * The input string to tokenize.
+     */
+    string input = 2;
+}
+
+/**
+ * Represents a response to tokenization.
+ */
+message TokenizeResponse {
+    /**
+     * The tokens inside the input string.
+     */
+    repeated string tokens = 1;
+
+    /**
+     * The token IDs inside the input string.
+     */
+    repeated uint64 token_ids = 2;
+}
+
+/**
+ * The tokenizer service, for analyzing tokens for a loaded model.
+ */
+service TokenizerService {
+    /**
+     * Analyze the input using a loaded model and return the results.
+     */
+    rpc Tokenize(TokenizeRequest) returns (TokenizeResponse);
+}

Sources/StableDiffusionCore/ModelState.swift

@@ -154,4 +154,15 @@ public actor ModelState {
         }
         return pipelineConfig
     }
+
+    public func tokenize(_ request: SdTokenizeRequest) throws -> SdTokenizeResponse {
+        guard let tokenizer else {
+            throw SdCoreError.modelNotLoaded
+        }
+        let results = tokenizer.tokenize(input: request.input)
+        var response = SdTokenizeResponse()
+        response.tokens = results.tokens
+        response.tokenIds = results.tokenIDs.map { UInt64($0) }
+        return response
+    }
 }

Sources/StableDiffusionProtos/StableDiffusion.grpc.swift

@@ -543,6 +543,199 @@ public enum SdImageGenerationServiceClientMetadata {
   }
 }
 
+///*
+/// The tokenizer service, for analyzing tokens for a loaded model.
+///
+/// Usage: instantiate `SdTokenizerServiceClient`, then call methods of this protocol to make API calls.
+public protocol SdTokenizerServiceClientProtocol: GRPCClient {
+  var serviceName: String { get }
+  var interceptors: SdTokenizerServiceClientInterceptorFactoryProtocol? { get }
+
+  func tokenize(
+    _ request: SdTokenizeRequest,
+    callOptions: CallOptions?
+  ) -> UnaryCall<SdTokenizeRequest, SdTokenizeResponse>
+}
+
+extension SdTokenizerServiceClientProtocol {
+  public var serviceName: String {
+    return "gay.pizza.stable.diffusion.TokenizerService"
+  }
+
+  ///*
+  /// Analyze the input using a loaded model and return the results.
+  ///
+  /// - Parameters:
+  ///   - request: Request to send to Tokenize.
+  ///   - callOptions: Call options.
+  /// - Returns: A `UnaryCall` with futures for the metadata, status and response.
+  public func tokenize(
+    _ request: SdTokenizeRequest,
+    callOptions: CallOptions? = nil
+  ) -> UnaryCall<SdTokenizeRequest, SdTokenizeResponse> {
+    return self.makeUnaryCall(
+      path: SdTokenizerServiceClientMetadata.Methods.tokenize.path,
+      request: request,
+      callOptions: callOptions ?? self.defaultCallOptions,
+      interceptors: self.interceptors?.makeTokenizeInterceptors() ?? []
+    )
+  }
+}
+
+#if compiler(>=5.6)
+@available(*, deprecated)
+extension SdTokenizerServiceClient: @unchecked Sendable {}
+#endif // compiler(>=5.6)
+
+@available(*, deprecated, renamed: "SdTokenizerServiceNIOClient")
+public final class SdTokenizerServiceClient: SdTokenizerServiceClientProtocol {
+  private let lock = Lock()
+  private var _defaultCallOptions: CallOptions
+  private var _interceptors: SdTokenizerServiceClientInterceptorFactoryProtocol?
+  public let channel: GRPCChannel
+  public var defaultCallOptions: CallOptions {
+    get { self.lock.withLock { return self._defaultCallOptions } }
+    set { self.lock.withLockVoid { self._defaultCallOptions = newValue } }
+  }
+  public var interceptors: SdTokenizerServiceClientInterceptorFactoryProtocol? {
+    get { self.lock.withLock { return self._interceptors } }
+    set { self.lock.withLockVoid { self._interceptors = newValue } }
+  }
+
+  /// Creates a client for the gay.pizza.stable.diffusion.TokenizerService service.
+  ///
+  /// - Parameters:
+  ///   - channel: `GRPCChannel` to the service host.
+  ///   - defaultCallOptions: Options to use for each service call if the user doesn't provide them.
+  ///   - interceptors: A factory providing interceptors for each RPC.
+  public init(
+    channel: GRPCChannel,
+    defaultCallOptions: CallOptions = CallOptions(),
+    interceptors: SdTokenizerServiceClientInterceptorFactoryProtocol? = nil
+  ) {
+    self.channel = channel
+    self._defaultCallOptions = defaultCallOptions
+    self._interceptors = interceptors
+  }
+}
+
+public struct SdTokenizerServiceNIOClient: SdTokenizerServiceClientProtocol {
+  public var channel: GRPCChannel
+  public var defaultCallOptions: CallOptions
+  public var interceptors: SdTokenizerServiceClientInterceptorFactoryProtocol?
+
+  /// Creates a client for the gay.pizza.stable.diffusion.TokenizerService service.
+  ///
+  /// - Parameters:
+  ///   - channel: `GRPCChannel` to the service host.
+  ///   - defaultCallOptions: Options to use for each service call if the user doesn't provide them.
+  ///   - interceptors: A factory providing interceptors for each RPC.
+  public init(
+    channel: GRPCChannel,
+    defaultCallOptions: CallOptions = CallOptions(),
+    interceptors: SdTokenizerServiceClientInterceptorFactoryProtocol? = nil
+  ) {
+    self.channel = channel
+    self.defaultCallOptions = defaultCallOptions
+    self.interceptors = interceptors
+  }
+}
+
+#if compiler(>=5.6)
+///*
+/// The tokenizer service, for analyzing tokens for a loaded model.
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
+public protocol SdTokenizerServiceAsyncClientProtocol: GRPCClient {
+  static var serviceDescriptor: GRPCServiceDescriptor { get }
+  var interceptors: SdTokenizerServiceClientInterceptorFactoryProtocol? { get }
+
+  func makeTokenizeCall(
+    _ request: SdTokenizeRequest,
+    callOptions: CallOptions?
+  ) -> GRPCAsyncUnaryCall<SdTokenizeRequest, SdTokenizeResponse>
+}
+
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
+extension SdTokenizerServiceAsyncClientProtocol {
+  public static var serviceDescriptor: GRPCServiceDescriptor {
+    return SdTokenizerServiceClientMetadata.serviceDescriptor
+  }
+
+  public var interceptors: SdTokenizerServiceClientInterceptorFactoryProtocol? {
+    return nil
+  }
+
+  public func makeTokenizeCall(
+    _ request: SdTokenizeRequest,
+    callOptions: CallOptions? = nil
+  ) -> GRPCAsyncUnaryCall<SdTokenizeRequest, SdTokenizeResponse> {
+    return self.makeAsyncUnaryCall(
+      path: SdTokenizerServiceClientMetadata.Methods.tokenize.path,
+      request: request,
+      callOptions: callOptions ?? self.defaultCallOptions,
+      interceptors: self.interceptors?.makeTokenizeInterceptors() ?? []
+    )
+  }
+}
+
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
+extension SdTokenizerServiceAsyncClientProtocol {
+  public func tokenize(
+    _ request: SdTokenizeRequest,
+    callOptions: CallOptions? = nil
+  ) async throws -> SdTokenizeResponse {
+    return try await self.performAsyncUnaryCall(
+      path: SdTokenizerServiceClientMetadata.Methods.tokenize.path,
+      request: request,
+      callOptions: callOptions ?? self.defaultCallOptions,
+      interceptors: self.interceptors?.makeTokenizeInterceptors() ?? []
+    )
+  }
+}
+
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
+public struct SdTokenizerServiceAsyncClient: SdTokenizerServiceAsyncClientProtocol {
+  public var channel: GRPCChannel
+  public var defaultCallOptions: CallOptions
+  public var interceptors: SdTokenizerServiceClientInterceptorFactoryProtocol?
+
+  public init(
+    channel: GRPCChannel,
+    defaultCallOptions: CallOptions = CallOptions(),
+    interceptors: SdTokenizerServiceClientInterceptorFactoryProtocol? = nil
+  ) {
+    self.channel = channel
+    self.defaultCallOptions = defaultCallOptions
+    self.interceptors = interceptors
+  }
+}
+
+#endif // compiler(>=5.6)
+
+public protocol SdTokenizerServiceClientInterceptorFactoryProtocol: GRPCSendable {
+
+  /// - Returns: Interceptors to use when invoking 'tokenize'.
+  func makeTokenizeInterceptors() -> [ClientInterceptor<SdTokenizeRequest, SdTokenizeResponse>]
+}
+
+public enum SdTokenizerServiceClientMetadata {
+  public static let serviceDescriptor = GRPCServiceDescriptor(
+    name: "TokenizerService",
+    fullName: "gay.pizza.stable.diffusion.TokenizerService",
+    methods: [
+      SdTokenizerServiceClientMetadata.Methods.tokenize,
+    ]
+  )
+
+  public enum Methods {
+    public static let tokenize = GRPCMethodDescriptor(
+      name: "Tokenize",
+      path: "/gay.pizza.stable.diffusion.TokenizerService/Tokenize",
+      type: GRPCCallType.unary
+    )
+  }
+}
+
 ///*
 /// The model service, for management and loading of models.
 ///
@@ -862,3 +1055,121 @@ public enum SdImageGenerationServiceServerMetadata {
     )
   }
 }
+///*
+/// The tokenizer service, for analyzing tokens for a loaded model.
+///
+/// To build a server, implement a class that conforms to this protocol.
+public protocol SdTokenizerServiceProvider: CallHandlerProvider {
+  var interceptors: SdTokenizerServiceServerInterceptorFactoryProtocol? { get }
+
+  ///*
+  /// Analyze the input using a loaded model and return the results.
+  func tokenize(request: SdTokenizeRequest, context: StatusOnlyCallContext) -> EventLoopFuture<SdTokenizeResponse>
+}
+
+extension SdTokenizerServiceProvider {
+  public var serviceName: Substring {
+    return SdTokenizerServiceServerMetadata.serviceDescriptor.fullName[...]
+  }
+
+  /// Determines, calls and returns the appropriate request handler, depending on the request's method.
+  /// Returns nil for methods not handled by this service.
+  public func handle(
+    method name: Substring,
+    context: CallHandlerContext
+  ) -> GRPCServerHandlerProtocol? {
+    switch name {
+    case "Tokenize":
+      return UnaryServerHandler(
+        context: context,
+        requestDeserializer: ProtobufDeserializer<SdTokenizeRequest>(),
+        responseSerializer: ProtobufSerializer<SdTokenizeResponse>(),
+        interceptors: self.interceptors?.makeTokenizeInterceptors() ?? [],
+        userFunction: self.tokenize(request:context:)
+      )
+
+    default:
+      return nil
+    }
+  }
+}
+
+#if compiler(>=5.6)
+
+///*
+/// The tokenizer service, for analyzing tokens for a loaded model.
+///
+/// To implement a server, implement an object which conforms to this protocol.
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
+public protocol SdTokenizerServiceAsyncProvider: CallHandlerProvider {
+  static var serviceDescriptor: GRPCServiceDescriptor { get }
+  var interceptors: SdTokenizerServiceServerInterceptorFactoryProtocol? { get }
+
+  ///*
+  /// Analyze the input using a loaded model and return the results.
+  @Sendable func tokenize(
+    request: SdTokenizeRequest,
+    context: GRPCAsyncServerCallContext
+  ) async throws -> SdTokenizeResponse
+}
+
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
+extension SdTokenizerServiceAsyncProvider {
+  public static var serviceDescriptor: GRPCServiceDescriptor {
+    return SdTokenizerServiceServerMetadata.serviceDescriptor
+  }
+
+  public var serviceName: Substring {
+    return SdTokenizerServiceServerMetadata.serviceDescriptor.fullName[...]
+  }
+
+  public var interceptors: SdTokenizerServiceServerInterceptorFactoryProtocol? {
+    return nil
+  }
+
+  public func handle(
+    method name: Substring,
+    context: CallHandlerContext
+  ) -> GRPCServerHandlerProtocol? {
+    switch name {
+    case "Tokenize":
+      return GRPCAsyncServerHandler(
+        context: context,
+        requestDeserializer: ProtobufDeserializer<SdTokenizeRequest>(),
+        responseSerializer: ProtobufSerializer<SdTokenizeResponse>(),
+        interceptors: self.interceptors?.makeTokenizeInterceptors() ?? [],
+        wrapping: self.tokenize(request:context:)
+      )
+
+    default:
+      return nil
+    }
+  }
+}
+
+#endif // compiler(>=5.6)
+
+public protocol SdTokenizerServiceServerInterceptorFactoryProtocol {
+
+  /// - Returns: Interceptors to use when handling 'tokenize'.
+  ///   Defaults to calling `self.makeInterceptors()`.
+  func makeTokenizeInterceptors() -> [ServerInterceptor<SdTokenizeRequest, SdTokenizeResponse>]
+}
+
+public enum SdTokenizerServiceServerMetadata {
+  public static let serviceDescriptor = GRPCServiceDescriptor(
+    name: "TokenizerService",
+    fullName: "gay.pizza.stable.diffusion.TokenizerService",
+    methods: [
+      SdTokenizerServiceServerMetadata.Methods.tokenize,
+    ]
+  )
+
+  public enum Methods {
+    public static let tokenize = GRPCMethodDescriptor(
+      name: "Tokenize",
+      path: "/gay.pizza.stable.diffusion.TokenizerService/Tokenize",
+      type: GRPCCallType.unary
+    )
+  }
+}

Sources/StableDiffusionProtos/StableDiffusion.pb.swift

@@ -562,6 +562,46 @@ public struct SdGenerateImagesStreamUpdate {
   public init() {}
 }
 
+///*
+/// Represents a request to tokenize an input.
+public struct SdTokenizeRequest {
+  // SwiftProtobuf.Message conformance is added in an extension below. See the
+  // `Message` and `Message+*Additions` files in the SwiftProtobuf library for
+  // methods supported on all messages.
+
+  ///*
+  /// The name of a loaded model to use for tokenization.
+  public var modelName: String = String()
+
+  ///*
+  /// The input string to tokenize.
+  public var input: String = String()
+
+  public var unknownFields = SwiftProtobuf.UnknownStorage()
+
+  public init() {}
+}
+
+///*
+/// Represents a response to tokenization.
+public struct SdTokenizeResponse {
+  // SwiftProtobuf.Message conformance is added in an extension below. See the
+  // `Message` and `Message+*Additions` files in the SwiftProtobuf library for
+  // methods supported on all messages.
+
+  ///*
+  /// The tokens inside the input string.
+  public var tokens: [String] = []
+
+  ///*
+  /// The token IDs inside the input string.
+  public var tokenIds: [UInt64] = []
+
+  public var unknownFields = SwiftProtobuf.UnknownStorage()
+
+  public init() {}
+}
+
 #if swift(>=5.5) && canImport(_Concurrency)
 extension SdModelAttention: @unchecked Sendable {}
 extension SdScheduler: @unchecked Sendable {}
@@ -579,6 +619,8 @@ extension SdGenerateImagesBatchProgressUpdate: @unchecked Sendable {}
 extension SdGenerateImagesBatchCompletedUpdate: @unchecked Sendable {}
 extension SdGenerateImagesStreamUpdate: @unchecked Sendable {}
 extension SdGenerateImagesStreamUpdate.OneOf_Update: @unchecked Sendable {}
+extension SdTokenizeRequest: @unchecked Sendable {}
+extension SdTokenizeResponse: @unchecked Sendable {}
 #endif  // swift(>=5.5) && canImport(_Concurrency)
 
 // MARK: - Code below here is support for the SwiftProtobuf runtime.
@@ -1125,3 +1167,79 @@ extension SdGenerateImagesStreamUpdate: SwiftProtobuf.Message, SwiftProtobuf._Me
     return true
   }
 }
+
+extension SdTokenizeRequest: SwiftProtobuf.Message, SwiftProtobuf._MessageImplementationBase, SwiftProtobuf._ProtoNameProviding {
+  public static let protoMessageName: String = _protobuf_package + ".TokenizeRequest"
+  public static let _protobuf_nameMap: SwiftProtobuf._NameMap = [
+    1: .standard(proto: "model_name"),
+    2: .same(proto: "input"),
+  ]
+
+  public mutating func decodeMessage<D: SwiftProtobuf.Decoder>(decoder: inout D) throws {
+    while let fieldNumber = try decoder.nextFieldNumber() {
+      // The use of inline closures is to circumvent an issue where the compiler
+      // allocates stack space for every case branch when no optimizations are
+      // enabled. https://github.com/apple/swift-protobuf/issues/1034
+      switch fieldNumber {
+      case 1: try { try decoder.decodeSingularStringField(value: &self.modelName) }()
+      case 2: try { try decoder.decodeSingularStringField(value: &self.input) }()
+      default: break
+      }
+    }
+  }
+
+  public func traverse<V: SwiftProtobuf.Visitor>(visitor: inout V) throws {
+    if !self.modelName.isEmpty {
+      try visitor.visitSingularStringField(value: self.modelName, fieldNumber: 1)
+    }
+    if !self.input.isEmpty {
+      try visitor.visitSingularStringField(value: self.input, fieldNumber: 2)
+    }
+    try unknownFields.traverse(visitor: &visitor)
+  }
+
+  public static func ==(lhs: SdTokenizeRequest, rhs: SdTokenizeRequest) -> Bool {
+    if lhs.modelName != rhs.modelName {return false}
+    if lhs.input != rhs.input {return false}
+    if lhs.unknownFields != rhs.unknownFields {return false}
+    return true
+  }
+}
+
+extension SdTokenizeResponse: SwiftProtobuf.Message, SwiftProtobuf._MessageImplementationBase, SwiftProtobuf._ProtoNameProviding {
+  public static let protoMessageName: String = _protobuf_package + ".TokenizeResponse"
+  public static let _protobuf_nameMap: SwiftProtobuf._NameMap = [
+    1: .same(proto: "tokens"),
+    2: .standard(proto: "token_ids"),
+  ]
+
+  public mutating func decodeMessage<D: SwiftProtobuf.Decoder>(decoder: inout D) throws {
+    while let fieldNumber = try decoder.nextFieldNumber() {
+      // The use of inline closures is to circumvent an issue where the compiler
+      // allocates stack space for every case branch when no optimizations are
+      // enabled. https://github.com/apple/swift-protobuf/issues/1034
+      switch fieldNumber {
+      case 1: try { try decoder.decodeRepeatedStringField(value: &self.tokens) }()
+      case 2: try { try decoder.decodeRepeatedUInt64Field(value: &self.tokenIds) }()
+      default: break
+      }
+    }
+  }
+
+  public func traverse<V: SwiftProtobuf.Visitor>(visitor: inout V) throws {
+    if !self.tokens.isEmpty {
+      try visitor.visitRepeatedStringField(value: self.tokens, fieldNumber: 1)
+    }
+    if !self.tokenIds.isEmpty {
+      try visitor.visitPackedUInt64Field(value: self.tokenIds, fieldNumber: 2)
+    }
+    try unknownFields.traverse(visitor: &visitor)
+  }
+
+  public static func ==(lhs: SdTokenizeResponse, rhs: SdTokenizeResponse) -> Bool {
+    if lhs.tokens != rhs.tokens {return false}
+    if lhs.tokenIds != rhs.tokenIds {return false}
+    if lhs.unknownFields != rhs.unknownFields {return false}
+    return true
+  }
+}

Sources/StableDiffusionServer/TokenizerService.swift

@@ -0,0 +1,19 @@
+import Foundation
+import GRPC
+import StableDiffusionCore
+import StableDiffusionProtos
+
+class TokenizerServiceProvider: SdTokenizerServiceAsyncProvider {
+    private let modelManager: ModelManager
+
+    init(modelManager: ModelManager) {
+        self.modelManager = modelManager
+    }
+
+    func tokenize(request: SdTokenizeRequest, context _: GRPCAsyncServerCallContext) async throws -> SdTokenizeResponse {
+        guard let state = await modelManager.getModelState(name: request.modelName) else {
+            throw SdCoreError.modelNotFound
+        }
+        return try await state.tokenize(request)
+    }
+}

Sources/StableDiffusionServer/main.swift

@@ -34,7 +34,8 @@ struct ServerCommand: ParsableCommand {
         _ = Server.insecure(group: group)
             .withServiceProviders([
                 ModelServiceProvider(modelManager: modelManager),
-                ImageGenerationServiceProvider(modelManager: modelManager)
+                ImageGenerationServiceProvider(modelManager: modelManager),
+                TokenizerServiceProvider(modelManager: modelManager)
             ])
             .bind(host: bindHost, port: bindPort)