kpt-grpc-demo/google/cloud/speech/v2/cloud_speech.proto

// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

syntax = "proto3";

package google.cloud.speech.v2;

import "google/api/annotations.proto";
import "google/api/client.proto";
import "google/api/field_behavior.proto";
import "google/api/resource.proto";
import "google/longrunning/operations.proto";
import "google/protobuf/duration.proto";
import "google/protobuf/field_mask.proto";
import "google/protobuf/timestamp.proto";
import "google/rpc/status.proto";

option go_package = "google.golang.org/genproto/googleapis/cloud/speech/v2;speech";
option java_multiple_files = true;
option java_outer_classname = "CloudSpeechProto";
option java_package = "com.google.cloud.speech.v2";
option (google.api.resource_definition) = {
  type: "cloudkms.googleapis.com/CryptoKey"
  pattern: "projects/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}"
};
option (google.api.resource_definition) = {
  type: "cloudkms.googleapis.com/CryptoKeyVersion"
  pattern: "projects/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}/cryptoKeyVersions/{crypto_key_version}"
};

// Enables speech transcription and resource management.
service Speech {
  option (google.api.default_host) = "speech.googleapis.com";
  option (google.api.oauth_scopes) =
      "https://www.googleapis.com/auth/cloud-platform";

  // Creates a [Recognizer][google.cloud.speech.v2.Recognizer].
  rpc CreateRecognizer(CreateRecognizerRequest)
      returns (google.longrunning.Operation) {
    option (google.api.http) = {
      post: "/v2/{parent=projects/*/locations/*}/recognizers"
      body: "recognizer"
    };
    option (google.api.method_signature) = "parent,recognizer,recognizer_id";
    option (google.longrunning.operation_info) = {
      response_type: "Recognizer"
      metadata_type: "OperationMetadata"
    };
  }

  // Lists Recognizers.
  rpc ListRecognizers(ListRecognizersRequest)
      returns (ListRecognizersResponse) {
    option (google.api.http) = {
      get: "/v2/{parent=projects/*/locations/*}/recognizers"
    };
    option (google.api.method_signature) = "parent";
  }

  // Returns the requested
  // [Recognizer][google.cloud.speech.v2.Recognizer]. Fails with
  // [NOT_FOUND][google.rpc.Code.NOT_FOUND] if the requested recognizer doesn't
  // exist.
  rpc GetRecognizer(GetRecognizerRequest) returns (Recognizer) {
    option (google.api.http) = {
      get: "/v2/{name=projects/*/locations/*/recognizers/*}"
    };
    option (google.api.method_signature) = "name";
  }

  // Updates the [Recognizer][google.cloud.speech.v2.Recognizer].
  rpc UpdateRecognizer(UpdateRecognizerRequest)
      returns (google.longrunning.Operation) {
    option (google.api.http) = {
      patch: "/v2/{recognizer.name=projects/*/locations/*/recognizers/*}"
      body: "recognizer"
    };
    option (google.api.method_signature) = "recognizer,update_mask";
    option (google.longrunning.operation_info) = {
      response_type: "Recognizer"
      metadata_type: "OperationMetadata"
    };
  }

  // Deletes the [Recognizer][google.cloud.speech.v2.Recognizer].
  rpc DeleteRecognizer(DeleteRecognizerRequest)
      returns (google.longrunning.Operation) {
    option (google.api.http) = {
      delete: "/v2/{name=projects/*/locations/*/recognizers/*}"
    };
    option (google.api.method_signature) = "name";
    option (google.longrunning.operation_info) = {
      response_type: "Recognizer"
      metadata_type: "OperationMetadata"
    };
  }

  // Undeletes the [Recognizer][google.cloud.speech.v2.Recognizer].
  rpc UndeleteRecognizer(UndeleteRecognizerRequest)
      returns (google.longrunning.Operation) {
    option (google.api.http) = {
      post: "/v2/{name=projects/*/locations/*/recognizers/*}:undelete"
      body: "*"
    };
    option (google.api.method_signature) = "name";
    option (google.longrunning.operation_info) = {
      response_type: "Recognizer"
      metadata_type: "OperationMetadata"
    };
  }

  // Performs synchronous Speech recognition: receive results after all audio
  // has been sent and processed.
  rpc Recognize(RecognizeRequest) returns (RecognizeResponse) {
    option (google.api.http) = {
      post: "/v2/{recognizer=projects/*/locations/*/recognizers/*}:recognize"
      body: "*"
    };
    option (google.api.method_signature) =
        "recognizer,config,config_mask,content";
    option (google.api.method_signature) = "recognizer,config,config_mask,uri";
  }

  // Performs bidirectional streaming speech recognition: receive results while
  // sending audio. This method is only available via the gRPC API (not REST).
  rpc StreamingRecognize(stream StreamingRecognizeRequest)
      returns (stream StreamingRecognizeResponse) {}

  // Performs batch asynchronous speech recognition: send a request with N
  // audio files and receive a long running operation that can be polled to see
  // when the transcriptions are finished.
  rpc BatchRecognize(BatchRecognizeRequest)
      returns (google.longrunning.Operation) {
    option (google.api.http) = {
      post: "/v2/{recognizer=projects/*/locations/*/recognizers/*}:batchRecognize"
      body: "*"
    };
    option (google.api.method_signature) =
        "recognizer,config,config_mask,files";
    option (google.longrunning.operation_info) = {
      response_type: "BatchRecognizeResponse"
      metadata_type: "OperationMetadata"
    };
  }

  // Returns the requested [Config][google.cloud.speech.v2.Config].
  rpc GetConfig(GetConfigRequest) returns (Config) {
    option (google.api.http) = {
      get: "/v2/{name=projects/*/locations/*/config}"
    };
    option (google.api.method_signature) = "name";
  }

  // Updates the [Config][google.cloud.speech.v2.Config].
  rpc UpdateConfig(UpdateConfigRequest) returns (Config) {
    option (google.api.http) = {
      patch: "/v2/{config.name=projects/*/locations/*/config}"
      body: "config"
    };
    option (google.api.method_signature) = "config,update_mask";
  }

  // Creates a [CustomClass][google.cloud.speech.v2.CustomClass].
  rpc CreateCustomClass(CreateCustomClassRequest)
      returns (google.longrunning.Operation) {
    option (google.api.http) = {
      post: "/v2/{parent=projects/*/locations/*}/customClasses"
      body: "custom_class"
    };
    option (google.api.method_signature) =
        "parent,custom_class,custom_class_id";
    option (google.longrunning.operation_info) = {
      response_type: "CustomClass"
      metadata_type: "OperationMetadata"
    };
  }

  // Lists CustomClasses.
  rpc ListCustomClasses(ListCustomClassesRequest)
      returns (ListCustomClassesResponse) {
    option (google.api.http) = {
      get: "/v2/{parent=projects/*/locations/*}/customClasses"
    };
    option (google.api.method_signature) = "parent";
  }

  // Returns the requested
  // [CustomClass][google.cloud.speech.v2.CustomClass].
  rpc GetCustomClass(GetCustomClassRequest) returns (CustomClass) {
    option (google.api.http) = {
      get: "/v2/{name=projects/*/locations/*/customClasses/*}"
    };
    option (google.api.method_signature) = "name";
  }

  // Updates the [CustomClass][google.cloud.speech.v2.CustomClass].
  rpc UpdateCustomClass(UpdateCustomClassRequest)
      returns (google.longrunning.Operation) {
    option (google.api.http) = {
      patch: "/v2/{custom_class.name=projects/*/locations/*/customClasses/*}"
      body: "custom_class"
    };
    option (google.api.method_signature) = "custom_class,update_mask";
    option (google.longrunning.operation_info) = {
      response_type: "CustomClass"
      metadata_type: "OperationMetadata"
    };
  }

  // Deletes the [CustomClass][google.cloud.speech.v2.CustomClass].
  rpc DeleteCustomClass(DeleteCustomClassRequest)
      returns (google.longrunning.Operation) {
    option (google.api.http) = {
      delete: "/v2/{name=projects/*/locations/*/customClasses/*}"
    };
    option (google.api.method_signature) = "name";
    option (google.longrunning.operation_info) = {
      response_type: "CustomClass"
      metadata_type: "OperationMetadata"
    };
  }

  // Undeletes the [CustomClass][google.cloud.speech.v2.CustomClass].
  rpc UndeleteCustomClass(UndeleteCustomClassRequest)
      returns (google.longrunning.Operation) {
    option (google.api.http) = {
      post: "/v2/{name=projects/*/locations/*/customClasses/*}:undelete"
      body: "*"
    };
    option (google.api.method_signature) = "name";
    option (google.longrunning.operation_info) = {
      response_type: "CustomClass"
      metadata_type: "OperationMetadata"
    };
  }

  // Creates a [PhraseSet][google.cloud.speech.v2.PhraseSet].
  rpc CreatePhraseSet(CreatePhraseSetRequest)
      returns (google.longrunning.Operation) {
    option (google.api.http) = {
      post: "/v2/{parent=projects/*/locations/*}/phraseSets"
      body: "phrase_set"
    };
    option (google.api.method_signature) = "parent,phrase_set,phrase_set_id";
    option (google.longrunning.operation_info) = {
      response_type: "PhraseSet"
      metadata_type: "OperationMetadata"
    };
  }

  // Lists PhraseSets.
  rpc ListPhraseSets(ListPhraseSetsRequest) returns (ListPhraseSetsResponse) {
    option (google.api.http) = {
      get: "/v2/{parent=projects/*/locations/*}/phraseSets"
    };
    option (google.api.method_signature) = "parent";
  }

  // Returns the requested
  // [PhraseSet][google.cloud.speech.v2.PhraseSet].
  rpc GetPhraseSet(GetPhraseSetRequest) returns (PhraseSet) {
    option (google.api.http) = {
      get: "/v2/{name=projects/*/locations/*/phraseSets/*}"
    };
    option (google.api.method_signature) = "name";
  }

  // Updates the [PhraseSet][google.cloud.speech.v2.PhraseSet].
  rpc UpdatePhraseSet(UpdatePhraseSetRequest)
      returns (google.longrunning.Operation) {
    option (google.api.http) = {
      patch: "/v2/{phrase_set.name=projects/*/locations/*/phraseSets/*}"
      body: "phrase_set"
    };
    option (google.api.method_signature) = "phrase_set,update_mask";
    option (google.longrunning.operation_info) = {
      response_type: "PhraseSet"
      metadata_type: "OperationMetadata"
    };
  }

  // Deletes the [PhraseSet][google.cloud.speech.v2.PhraseSet].
  rpc DeletePhraseSet(DeletePhraseSetRequest)
      returns (google.longrunning.Operation) {
    option (google.api.http) = {
      delete: "/v2/{name=projects/*/locations/*/phraseSets/*}"
    };
    option (google.api.method_signature) = "name";
    option (google.longrunning.operation_info) = {
      response_type: "PhraseSet"
      metadata_type: "OperationMetadata"
    };
  }

  // Undeletes the [PhraseSet][google.cloud.speech.v2.PhraseSet].
  rpc UndeletePhraseSet(UndeletePhraseSetRequest)
      returns (google.longrunning.Operation) {
    option (google.api.http) = {
      post: "/v2/{name=projects/*/locations/*/phraseSets/*}:undelete"
      body: "*"
    };
    option (google.api.method_signature) = "name";
    option (google.longrunning.operation_info) = {
      response_type: "PhraseSet"
      metadata_type: "OperationMetadata"
    };
  }
}

// Request message for the
// [CreateRecognizer][google.cloud.speech.v2.Speech.CreateRecognizer] method.
message CreateRecognizerRequest {
  // Required. The Recognizer to create.
  Recognizer recognizer = 1 [(google.api.field_behavior) = REQUIRED];

  // If set, validate the request and preview the Recognizer, but do not
  // actually create it.
  bool validate_only = 2;

  // The ID to use for the Recognizer, which will become the final component of
  // the Recognizer's resource name.
  //
  // This value should be 4-63 characters, and valid characters
  // are /[a-z][0-9]-/.
  string recognizer_id = 3;

  // Required. The project and location where this Recognizer will be created.
  // The expected format is `projects/{project}/locations/{location}`.
  string parent = 4 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      child_type: "speech.googleapis.com/Recognizer"
    }
  ];
}

// Represents the metadata of a long-running operation.
message OperationMetadata {
  // The time the operation was created.
  google.protobuf.Timestamp create_time = 1;

  // The time the operation was last updated.
  google.protobuf.Timestamp update_time = 2;

  // The resource path for the target of the operation.
  string resource = 3;

  // The method that triggered the operation.
  string method = 4;

  // The [KMS key
  // name](https://cloud.google.com/kms/docs/resource-hierarchy#keys) with which
  // the content of the Operation is encrypted. The expected format is
  // `projects/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}`.
  string kms_key_name = 6 [(google.api.resource_reference) = {
    type: "cloudkms.googleapis.com/CryptoKey"
  }];

  // The [KMS key version
  // name](https://cloud.google.com/kms/docs/resource-hierarchy#key_versions)
  // with which content of the Operation is encrypted. The expected format is
  // `projects/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}/cryptoKeyVersions/{crypto_key_version}`.
  string kms_key_version_name = 7 [(google.api.resource_reference) = {
    type: "cloudkms.googleapis.com/CryptoKeyVersion"
  }];

  // The request that spawned the Operation.
  oneof request {
    // The BatchRecognizeRequest that spawned the Operation.
    BatchRecognizeRequest batch_recognize_request = 8;

    // The CreateRecognizerRequest that spawned the Operation.
    CreateRecognizerRequest create_recognizer_request = 9;

    // The UpdateRecognizerRequest that spawned the Operation.
    UpdateRecognizerRequest update_recognizer_request = 10;

    // The DeleteRecognizerRequest that spawned the Operation.
    DeleteRecognizerRequest delete_recognizer_request = 11;

    // The UndeleteRecognizerRequest that spawned the Operation.
    UndeleteRecognizerRequest undelete_recognizer_request = 12;

    // The CreateCustomClassRequest that spawned the Operation.
    CreateCustomClassRequest create_custom_class_request = 13;

    // The UpdateCustomClassRequest that spawned the Operation.
    UpdateCustomClassRequest update_custom_class_request = 14;

    // The DeleteCustomClassRequest that spawned the Operation.
    DeleteCustomClassRequest delete_custom_class_request = 15;

    // The UndeleteCustomClassRequest that spawned the Operation.
    UndeleteCustomClassRequest undelete_custom_class_request = 16;

    // The CreatePhraseSetRequest that spawned the Operation.
    CreatePhraseSetRequest create_phrase_set_request = 17;

    // The UpdatePhraseSetRequest that spawned the Operation.
    UpdatePhraseSetRequest update_phrase_set_request = 18;

    // The DeletePhraseSetRequest that spawned the Operation.
    DeletePhraseSetRequest delete_phrase_set_request = 19;

    // The UndeletePhraseSetRequest that spawned the Operation.
    UndeletePhraseSetRequest undelete_phrase_set_request = 20;

    // The UpdateConfigRequest that spawned the Operation.
    UpdateConfigRequest update_config_request = 21;
  }

  // The percent progress of the Operation. Values can range from 0-100. If the
  // value is 100, then the operation is finished.
  int32 progress_percent = 22;

  // Specific metadata per RPC
  oneof metadata {
    // Metadata specific to the BatchRecognize method.
    BatchRecognizeMetadata batch_recognize_metadata = 23;
  }
}

// Request message for the
// [ListRecognizers][google.cloud.speech.v2.Speech.ListRecognizers] method.
message ListRecognizersRequest {
  // Required. The project and location of Recognizers to list. The expected
  // format is `projects/{project}/locations/{location}`.
  string parent = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      type: "locations.googleapis.com/Location"
    }
  ];

  // The maximum number of Recognizers to return. The service may return fewer
  // than this value. If unspecified, at most 20 Recognizers will be returned.
  // The maximum value is 20; values above 20 will be coerced to 20.
  int32 page_size = 2;

  // A page token, received from a previous
  // [ListRecognizers][google.cloud.speech.v2.Speech.ListRecognizers] call.
  // Provide this to retrieve the subsequent page.
  //
  // When paginating, all other parameters provided to
  // [ListRecognizers][google.cloud.speech.v2.Speech.ListRecognizers] must match
  // the call that provided the page token.
  string page_token = 3;

  // Whether, or not, to show resources that have been deleted.
  bool show_deleted = 4;
}

// Response message for the
// [ListRecognizers][google.cloud.speech.v2.Speech.ListRecognizers] method.
message ListRecognizersResponse {
  // The list of requested Recognizers.
  repeated Recognizer recognizers = 1;

  // A token, which can be sent as
  // [page_token][google.cloud.speech.v2.ListRecognizersRequest.page_token] to
  // retrieve the next page. If this field is omitted, there are no subsequent
  // pages. This token expires after 72 hours.
  string next_page_token = 2;
}

// Request message for the
// [GetRecognizer][google.cloud.speech.v2.Speech.GetRecognizer] method.
message GetRecognizerRequest {
  // Required. The name of the Recognizer to retrieve. The expected format is
  // `projects/{project}/locations/{location}/recognizers/{recognizer}`.
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      type: "speech.googleapis.com/Recognizer"
    }
  ];
}

// Request message for the
// [UpdateRecognizer][google.cloud.speech.v2.Speech.UpdateRecognizer] method.
message UpdateRecognizerRequest {
  // Required. The Recognizer to update.
  //
  // The Recognizer's `name` field is used to identify the Recognizer to update.
  // Format: `projects/{project}/locations/{location}/recognizers/{recognizer}`.
  Recognizer recognizer = 1 [(google.api.field_behavior) = REQUIRED];

  // The list of fields to update. If empty, all non-default valued fields are
  // considered for update. Use `*` to update the entire Recognizer resource.
  google.protobuf.FieldMask update_mask = 2;

  // If set, validate the request and preview the updated Recognizer, but do not
  // actually update it.
  bool validate_only = 4;
}

// Request message for the
// [DeleteRecognizer][google.cloud.speech.v2.Speech.DeleteRecognizer] method.
message DeleteRecognizerRequest {
  // Required. The name of the Recognizer to delete.
  // Format: `projects/{project}/locations/{location}/recognizers/{recognizer}`
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      type: "speech.googleapis.com/Recognizer"
    }
  ];

  // If set, validate the request and preview the deleted Recognizer, but do not
  // actually delete it.
  bool validate_only = 2;

  // If set to true, and the Recognizer is not found, the request will succeed
  // and  be a no-op (no Operation is recorded in this case).
  bool allow_missing = 4;

  // This checksum is computed by the server based on the value of other
  // fields. This may be sent on update, undelete, and delete requests to ensure
  // the client has an up-to-date value before proceeding.
  string etag = 3;
}

// Request message for the
// [UndeleteRecognizer][google.cloud.speech.v2.Speech.UndeleteRecognizer]
// method.
message UndeleteRecognizerRequest {
  // Required. The name of the Recognizer to undelete.
  // Format: `projects/{project}/locations/{location}/recognizers/{recognizer}`
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      type: "speech.googleapis.com/Recognizer"
    }
  ];

  // If set, validate the request and preview the undeleted Recognizer, but do
  // not actually undelete it.
  bool validate_only = 3;

  // This checksum is computed by the server based on the value of other
  // fields. This may be sent on update, undelete, and delete requests to ensure
  // the client has an up-to-date value before proceeding.
  string etag = 4;
}

// A Recognizer message. Stores recognition configuration and metadata.
message Recognizer {
  option (google.api.resource) = {
    type: "speech.googleapis.com/Recognizer"
    pattern: "projects/{project}/locations/{location}/recognizers/{recognizer}"
    style: DECLARATIVE_FRIENDLY
  };

  // Set of states that define the lifecycle of a Recognizer.
  enum State {
    // The default value. This value is used if the state is omitted.
    STATE_UNSPECIFIED = 0;

    // The Recognizer is active and ready for use.
    ACTIVE = 2;

    // This Recognizer has been deleted.
    DELETED = 4;
  }

  // Output only. The resource name of the Recognizer.
  // Format: `projects/{project}/locations/{location}/recognizers/{recognizer}`.
  string name = 1 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. System-assigned unique identifier for the Recognizer.
  string uid = 2 [(google.api.field_behavior) = OUTPUT_ONLY];

  // User-settable, human-readable name for the Recognizer. Must be 63
  // characters or less.
  string display_name = 3;

  // Required. Which model to use for recognition requests. Select the model
  // best suited to your domain to get best results.
  //
  // Supported models:
  //
  // - `latest_long`
  //
  //   Best for long form content like media or conversation.
  //
  // - `latest_short`
  //
  //   Best for short form content like commands or single shot directed speech.
  //   When using this model, the service will stop transcribing audio after the
  //   first utterance is detected and completed.
  //
  // When using this model,
  // [SEPARATE_RECOGNITION_PER_CHANNEL][google.cloud.speech.v2.RecognitionFeatures.MultiChannelMode.SEPARATE_RECOGNITION_PER_CHANNEL]
  // is not supported; multi-channel audio is accepted, but only the first
  // channel will be processed and transcribed.
  string model = 4 [(google.api.field_behavior) = REQUIRED];

  // Required. The language of the supplied audio as a
  // [BCP-47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt) language tag.
  //
  // Supported languages:
  //
  // - `en-US`
  //
  // - `en-GB`
  //
  // - `fr-FR`
  //
  // If additional languages are provided, recognition result will contain
  // recognition in the most likely language detected. The recognition result
  // will include the language tag of the language detected in the audio.
  // When you create or update a Recognizer, these values are
  // stored in normalized BCP-47 form. For example, "en-us" is stored as
  // "en-US".
  repeated string language_codes = 17 [(google.api.field_behavior) = REQUIRED];

  // Default configuration to use for requests with this Recognizer.
  // This can be overwritten by inline configuration in the
  // [RecognizeRequest.config][google.cloud.speech.v2.RecognizeRequest.config]
  // field.
  RecognitionConfig default_recognition_config = 6;

  // Allows users to store small amounts of arbitrary data.
  // Both the key and the value must be 63 characters or less each.
  // At most 100 annotations.
  map<string, string> annotations = 7;

  // Output only. The Recognizer lifecycle state.
  State state = 8 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. Creation time.
  google.protobuf.Timestamp create_time = 9
      [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The most recent time this Recognizer was modified.
  google.protobuf.Timestamp update_time = 10
      [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The time at which this Recognizer was requested for deletion.
  google.protobuf.Timestamp delete_time = 11
      [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The time at which this Recognizer will be purged.
  google.protobuf.Timestamp expire_time = 14
      [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. This checksum is computed by the server based on the value of
  // other fields. This may be sent on update, undelete, and delete requests to
  // ensure the client has an up-to-date value before proceeding.
  string etag = 12 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. Whether or not this Recognizer is in the process of being
  // updated.
  bool reconciling = 13 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The [KMS key
  // name](https://cloud.google.com/kms/docs/resource-hierarchy#keys) with which
  // the Recognizer is encrypted. The expected format is
  // `projects/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}`.
  string kms_key_name = 15 [
    (google.api.field_behavior) = OUTPUT_ONLY,
    (google.api.resource_reference) = {
      type: "cloudkms.googleapis.com/CryptoKey"
    }
  ];

  // Output only. The [KMS key version
  // name](https://cloud.google.com/kms/docs/resource-hierarchy#key_versions)
  // with which the Recognizer is encrypted. The expected format is
  // `projects/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}/cryptoKeyVersions/{crypto_key_version}`.
  string kms_key_version_name = 16 [
    (google.api.field_behavior) = OUTPUT_ONLY,
    (google.api.resource_reference) = {
      type: "cloudkms.googleapis.com/CryptoKeyVersion"
    }
  ];
}

// Automatically detected decoding parameters.
// Supported for the following encodings:
// * WAV_LINEAR16: 16-bit signed little-endian PCM samples in a WAV container.
// * WAV_MULAW: 8-bit companded mulaw samples in a WAV container.
// * WAV_ALAW: 8-bit companded alaw samples in a WAV container.
// * RFC4867_5_AMR: AMR frames with an rfc4867.5 header.
// * RFC4867_5_AMRWB: AMR-WB frames with an rfc4867.5 header.
// * FLAC: FLAC frames in the "native FLAC" container format.
// * MP3: MPEG audio frames with optional (ignored) ID3 metadata.
// * OGG_OPUS: Opus audio frames in an Ogg container.
// * WEBM_OPUS: Opus audio frames in a WebM container.
message AutoDetectDecodingConfig {}

// Explicitly specified decoding parameters.
message ExplicitDecodingConfig {
  // Supported audio data encodings.
  enum AudioEncoding {
    // Default value. This value is unused.
    AUDIO_ENCODING_UNSPECIFIED = 0;

    // Headerless 16-bit signed little-endian PCM samples.
    LINEAR16 = 1;

    // Headerless 8-bit companded mulaw samples.
    MULAW = 2;

    // Headerless 8-bit companded alaw samples.
    ALAW = 3;
  }

  // Required. Encoding of the audio data sent for recognition.
  AudioEncoding encoding = 1 [(google.api.field_behavior) = REQUIRED];

  // Sample rate in Hertz of the audio data sent for recognition. Valid
  // values are: 8000-48000. 16000 is optimal. For best results, set the
  // sampling rate of the audio source to 16000 Hz. If that's not possible, use
  // the native sample rate of the audio source (instead of re-sampling).
  // Supported for the following encodings:
  // * LINEAR16: Headerless 16-bit signed little-endian PCM samples.
  // * MULAW: Headerless 8-bit companded mulaw samples.
  // * ALAW: Headerless 8-bit companded alaw samples.
  int32 sample_rate_hertz = 2;

  // Number of channels present in the audio data sent for recognition.
  // Supported for the following encodings:
  // * LINEAR16: Headerless 16-bit signed little-endian PCM samples.
  // * MULAW: Headerless 8-bit companded mulaw samples.
  // * ALAW: Headerless 8-bit companded alaw samples.
  int32 audio_channel_count = 3;
}

// Configuration to enable speaker diarization.
message SpeakerDiarizationConfig {
  // Required. Minimum number of speakers in the conversation. This range gives
  // you more flexibility by allowing the system to automatically determine the
  // correct number of speakers. If not set, the default value is 2.
  //
  // To fix the number of speakers detected in the audio, set
  // `min_speaker_count` = `max_speaker_count`.
  int32 min_speaker_count = 2 [(google.api.field_behavior) = REQUIRED];

  // Required. Maximum number of speakers in the conversation. Valid values are:
  // 1-6. Must be >= `min_speaker_count`. This range gives you more flexibility
  // by allowing the system to automatically determine the correct number of
  // speakers.
  int32 max_speaker_count = 3 [(google.api.field_behavior) = REQUIRED];
}

// Available recognition features.
message RecognitionFeatures {
  // Options for how to recognize multi-channel audio.
  enum MultiChannelMode {
    // Default value for the multi-channel mode. If the audio contains
    // multiple channels, only the first channel will be transcribed; other
    // channels will be ignored.
    MULTI_CHANNEL_MODE_UNSPECIFIED = 0;

    // If selected, each channel in the provided audio is transcribed
    // independently. This cannot be selected if the selected
    // [model][google.cloud.speech.v2.Recognizer.model] is `latest_short`.
    SEPARATE_RECOGNITION_PER_CHANNEL = 1;
  }

  // If set to `true`, the server will attempt to filter out profanities,
  // replacing all but the initial character in each filtered word with
  // asterisks, for instance, "f***". If set to `false` or omitted, profanities
  // won't be filtered out.
  bool profanity_filter = 1;

  // If `true`, the top result includes a list of words and the start and end
  // time offsets (timestamps) for those words. If `false`, no word-level time
  // offset information is returned. The default is `false`.
  bool enable_word_time_offsets = 2;

  // If `true`, the top result includes a list of words and the confidence for
  // those words. If `false`, no word-level confidence information is returned.
  // The default is `false`.
  bool enable_word_confidence = 3;

  // If `true`, adds punctuation to recognition result hypotheses. This feature
  // is only available in select languages. The default `false` value does not
  // add punctuation to result hypotheses.
  bool enable_automatic_punctuation = 4;

  // The spoken punctuation behavior for the call. If `true`, replaces spoken
  // punctuation with the corresponding symbols in the request. For example,
  // "how are you question mark" becomes "how are you?". See
  // https://cloud.google.com/speech-to-text/docs/spoken-punctuation for
  // support. If `false`, spoken punctuation is not replaced.
  bool enable_spoken_punctuation = 14;

  // The spoken emoji behavior for the call. If `true`, adds spoken emoji
  // formatting for the request. This will replace spoken emojis with the
  // corresponding Unicode symbols in the final transcript. If `false`, spoken
  // emojis are not replaced.
  bool enable_spoken_emojis = 15;

  // Mode for recognizing multi-channel audio.
  MultiChannelMode multi_channel_mode = 17;

  // Configuration to enable speaker diarization and set additional
  // parameters to make diarization better suited for your application.
  // When this is enabled, we send all the words from the beginning of the
  // audio for the top alternative in every consecutive STREAMING responses.
  // This is done in order to improve our speaker tags as our models learn to
  // identify the speakers in the conversation over time.
  // For non-streaming requests, the diarization results will be provided only
  // in the top alternative of the FINAL SpeechRecognitionResult.
  SpeakerDiarizationConfig diarization_config = 9;

  // Maximum number of recognition hypotheses to be returned.
  // The server may return fewer than `max_alternatives`.
  // Valid values are `0`-`30`. A value of `0` or `1` will return a maximum of
  // one. If omitted, will return a maximum of one.
  int32 max_alternatives = 16;
}

// Provides "hints" to the speech recognizer to favor specific words and phrases
// in the results. Phrase sets can be specified as an inline resource, or a
// reference to an existing phrase set resource.
message SpeechAdaptation {
  // A biasing phrase set, which can be either a string referencing the name of
  // an existing phrase set resource, or an inline definition of a phrase set.
  message AdaptationPhraseSet {
    oneof value {
      // The name of an existing phrase set resource. The user must have read
      // access to the resource and it must not be deleted.
      string phrase_set = 1 [(google.api.resource_reference) = {
        type: "speech.googleapis.com/PhraseSet"
      }];

      // An inline defined phrase set.
      PhraseSet inline_phrase_set = 2;
    }
  }

  // A list of inline or referenced phrase sets.
  repeated AdaptationPhraseSet phrase_sets = 1;

  // A list of inline custom classes. Existing custom class resources can be
  // referenced directly in a phrase set.
  repeated CustomClass custom_classes = 2;
}

// Provides information to the Recognizer that specifies how to process the
// recognition request.
message RecognitionConfig {
  // Decoding parameters for audio being sent for recognition.
  oneof decoding_config {
    // Automatically detect decoding parameters.
    // Preferred for supported formats.
    AutoDetectDecodingConfig auto_decoding_config = 7;

    // Explicitly specified decoding parameters.
    // Required if using headerless PCM audio (linear16, mulaw, alaw).
    ExplicitDecodingConfig explicit_decoding_config = 8;
  }

  // Speech recognition features to enable.
  RecognitionFeatures features = 2;

  // Speech adaptation context that weights recognizer predictions for specific
  // words and phrases.
  SpeechAdaptation adaptation = 6;
}

// Request message for the
// [Recognize][google.cloud.speech.v2.Speech.Recognize] method. Either
// `content` or `uri` must be supplied. Supplying both or neither returns
// [INVALID_ARGUMENT][google.rpc.Code.INVALID_ARGUMENT]. See [content
// limits](https://cloud.google.com/speech-to-text/quotas#content).
message RecognizeRequest {
  // Required. The name of the Recognizer to use during recognition. The
  // expected format is
  // `projects/{project}/locations/{location}/recognizers/{recognizer}`.
  string recognizer = 3 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      type: "speech.googleapis.com/Recognizer"
    }
  ];

  // Features and audio metadata to use for the Automatic Speech Recognition.
  // This field in combination with the
  // [config_mask][google.cloud.speech.v2.RecognizeRequest.config_mask] field
  // can be used to override parts of the
  // [default_recognition_config][google.cloud.speech.v2.Recognizer.default_recognition_config]
  // of the Recognizer resource.
  RecognitionConfig config = 1;

  // The list of fields in
  // [config][google.cloud.speech.v2.RecognizeRequest.config] that override the
  // values in the
  // [default_recognition_config][google.cloud.speech.v2.Recognizer.default_recognition_config]
  // of the recognizer during this recognition request. If no mask is provided,
  // all non-default valued fields in
  // [config][google.cloud.speech.v2.RecognizeRequest.config] override the
  // values in the recognizer for this recognition request. If a mask is
  // provided, only the fields listed in the mask override the config in the
  // recognizer for this recognition request. If a wildcard (`*`) is provided,
  // [config][google.cloud.speech.v2.RecognizeRequest.config] completely
  // overrides and replaces the config in the recognizer for this recognition
  // request.
  google.protobuf.FieldMask config_mask = 8;

  // The audio source, which is either inline content or a Google Cloud
  // Storage URI.
  oneof audio_source {
    // The audio data bytes encoded as specified in
    // [RecognitionConfig][google.cloud.speech.v2.RecognitionConfig]. As
    // with all bytes fields, proto buffers use a pure binary representation,
    // whereas JSON representations use base64.
    bytes content = 5;

    // URI that points to a file that contains audio data bytes as specified in
    // [RecognitionConfig][google.cloud.speech.v2.RecognitionConfig]. The file
    // must not be compressed (for example, gzip). Currently, only Google Cloud
    // Storage URIs are supported, which must be specified in the following
    // format: `gs://bucket_name/object_name` (other URI formats return
    // [INVALID_ARGUMENT][google.rpc.Code.INVALID_ARGUMENT]). For more
    // information, see [Request
    // URIs](https://cloud.google.com/storage/docs/reference-uris).
    string uri = 6;
  }
}

// Metadata about the recognition request and response.
message RecognitionResponseMetadata {
  // When available, billed audio seconds for the corresponding request.
  google.protobuf.Duration total_billed_duration = 6;
}

// Alternative hypotheses (a.k.a. n-best list).
message SpeechRecognitionAlternative {
  // Transcript text representing the words that the user spoke.
  string transcript = 1;

  // The confidence estimate between 0.0 and 1.0. A higher number
  // indicates an estimated greater likelihood that the recognized words are
  // correct. This field is set only for the top alternative of a non-streaming
  // result or, of a streaming result where
  // [is_final][google.cloud.speech.v2.StreamingRecognitionResult.is_final] is
  // set to `true`. This field is not guaranteed to be accurate and users should
  // not rely on it to be always provided. The default of 0.0 is a sentinel
  // value indicating `confidence` was not set.
  float confidence = 2;

  // A list of word-specific information for each recognized word.
  // When
  // [enable_speaker_diarization][google.cloud.speech.v2.SpeakerDiarizationConfig.enable_speaker_diarization]
  // is true, you will see all the words from the beginning of the audio.
  repeated WordInfo words = 3;
}

// Word-specific information for recognized words.
message WordInfo {
  // Time offset relative to the beginning of the audio,
  // and corresponding to the start of the spoken word.
  // This field is only set if
  // [enable_word_time_offsets][google.cloud.speech.v2.RecognitionFeatures.enable_word_time_offsets]
  // is `true` and only in the top hypothesis. This is an experimental feature
  // and the accuracy of the time offset can vary.
  google.protobuf.Duration start_offset = 1;

  // Time offset relative to the beginning of the audio,
  // and corresponding to the end of the spoken word.
  // This field is only set if
  // [enable_word_time_offsets][google.cloud.speech.v2.RecognitionFeatures.enable_word_time_offsets]
  // is `true` and only in the top hypothesis. This is an experimental feature
  // and the accuracy of the time offset can vary.
  google.protobuf.Duration end_offset = 2;

  // The word corresponding to this set of information.
  string word = 3;

  // The confidence estimate between 0.0 and 1.0. A higher number
  // indicates an estimated greater likelihood that the recognized words are
  // correct. This field is set only for the top alternative of a non-streaming
  // result or, of a streaming result where
  // [is_final][google.cloud.speech.v2.StreamingRecognitionResult.is_final] is
  // set to `true`. This field is not guaranteed to be accurate and users should
  // not rely on it to be always provided. The default of 0.0 is a sentinel
  // value indicating `confidence` was not set.
  float confidence = 4;

  // A distinct label is assigned for every speaker within the audio. This field
  // specifies which one of those speakers was detected to have spoken this
  // word. `speaker_label` is set if
  // [enable_speaker_diarization][google.cloud.speech.v2.SpeakerDiarizationConfig.enable_speaker_diarization]
  // is `true` and only in the top alternative.
  string speaker_label = 6;
}

// A speech recognition result corresponding to a portion of the audio.
message SpeechRecognitionResult {
  // May contain one or more recognition hypotheses. These alternatives are
  // ordered in terms of accuracy, with the top (first) alternative being the
  // most probable, as ranked by the recognizer.
  repeated SpeechRecognitionAlternative alternatives = 1;

  // For multi-channel audio, this is the channel number corresponding to the
  // recognized result for the audio from that channel.
  // For `audio_channel_count` = `N`, its output values can range from `1` to
  // `N`.
  int32 channel_tag = 2;

  // Time offset of the end of this result relative to the beginning of the
  // audio.
  google.protobuf.Duration result_end_offset = 4;

  // Output only. The [BCP-47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt)
  // language tag of the language in this result. This language code was
  // detected to have the most likelihood of being spoken in the audio.
  string language_code = 5 [(google.api.field_behavior) = OUTPUT_ONLY];
}

// Response message for the
// [Recognize][google.cloud.speech.v2.Speech.Recognize] method.
message RecognizeResponse {
  // Sequential list of transcription results corresponding to sequential
  // portions of audio.
  repeated SpeechRecognitionResult results = 3;

  // Metadata about the recognition.
  RecognitionResponseMetadata metadata = 2;
}

// Available recognition features specific to streaming recognition requests.
message StreamingRecognitionFeatures {
  // Events that a timeout can be set on for voice activity.
  message VoiceActivityTimeout {
    // Duration to timeout the stream if no speech begins. If this is set and
    // no speech is detected in this duration at the start of the stream, the
    // server will close the stream.
    google.protobuf.Duration speech_start_timeout = 1;

    // Duration to timeout the stream after speech ends. If this is set and no
    // speech is detected in this duration after speech was detected, the server
    // will close the stream.
    google.protobuf.Duration speech_end_timeout = 2;
  }

  // If `true`, responses with voice activity speech events will be returned as
  // they are detected.
  bool enable_voice_activity_events = 1;

  // Whether or not to stream interim results to the client. If set to true,
  // interim results will be streamed to the client. Otherwise, only the final
  // response will be streamed back.
  bool interim_results = 2;

  // If set, the server will automatically close the stream after the specified
  // duration has elapsed after the last VOICE_ACTIVITY speech event has been
  // sent. The field `voice_activity_events` must also be set to true.
  VoiceActivityTimeout voice_activity_timeout = 3;
}

// Provides configuration information for the StreamingRecognize request.
message StreamingRecognitionConfig {
  // Required. Features and audio metadata to use for the Automatic Speech
  // Recognition. This field in combination with the
  // [config_mask][google.cloud.speech.v2.StreamingRecognitionConfig.config_mask]
  // field can be used to override parts of the
  // [default_recognition_config][google.cloud.speech.v2.Recognizer.default_recognition_config]
  // of the Recognizer resource.
  RecognitionConfig config = 1 [(google.api.field_behavior) = REQUIRED];

  // The list of fields in
  // [config][google.cloud.speech.v2.StreamingRecognitionConfig.config] that
  // override the values in the
  // [default_recognition_config][google.cloud.speech.v2.Recognizer.default_recognition_config]
  // of the recognizer during this recognition request. If no mask is provided,
  // all non-default valued fields in
  // [config][google.cloud.speech.v2.StreamingRecognitionConfig.config] override
  // the values in the recognizer for this recognition request. If a mask is
  // provided, only the fields listed in the mask override the config in the
  // recognizer for this recognition request. If a wildcard (`*`) is provided,
  // [config][google.cloud.speech.v2.StreamingRecognitionConfig.config]
  // completely overrides and replaces the config in the recognizer for this
  // recognition request.
  google.protobuf.FieldMask config_mask = 3;

  // Speech recognition features to enable specific to streaming audio
  // recognition requests.
  StreamingRecognitionFeatures streaming_features = 2;
}

// Request message for the
// [StreamingRecognize][google.cloud.speech.v2.Speech.StreamingRecognize]
// method. Multiple
// [StreamingRecognizeRequest][google.cloud.speech.v2.StreamingRecognizeRequest]
// messages are sent. The first message must contain a
// [recognizer][google.cloud.speech.v2.StreamingRecognizeRequest.recognizer] and
// optionally a
// [streaming_config][google.cloud.speech.v2.StreamingRecognizeRequest.streaming_config]
// message and must not contain
// [audio][google.cloud.speech.v2.StreamingRecognizeRequest.audio]. All
// subsequent messages must contain
// [audio][google.cloud.speech.v2.StreamingRecognizeRequest.audio] and must not
// contain a
// [streaming_config][google.cloud.speech.v2.StreamingRecognizeRequest.streaming_config]
// message.
message StreamingRecognizeRequest {
  // Required. Streaming recognition should start with an initial request having
  // a `recognizer`. Subsequent requests carry the audio data to be recognized.
  //
  // The initial request with configuration can be omitted if the Recognizer
  // being used has a
  // [default_recognition_config][google.cloud.speech.v2.Recognizer.default_recognition_config].
  string recognizer = 3 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      type: "speech.googleapis.com/Recognizer"
    }
  ];

  oneof streaming_request {
    // StreamingRecognitionConfig to be used in this recognition attempt.
    // If provided, it will override the default RecognitionConfig stored in the
    // Recognizer.
    StreamingRecognitionConfig streaming_config = 6;

    // Inline audio bytes to be Recognized.
    bytes audio = 5;
  }
}

// Request message for the
// [BatchRecognize][google.cloud.speech.v2.Speech.BatchRecognize]
// method.
message BatchRecognizeRequest {
  // Required. Resource name of the recognizer to be used for ASR.
  string recognizer = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      type: "speech.googleapis.com/Recognizer"
    }
  ];

  // Features and audio metadata to use for the Automatic Speech Recognition.
  // This field in combination with the
  // [config_mask][google.cloud.speech.v2.BatchRecognizeRequest.config_mask]
  // field can be used to override parts of the
  // [default_recognition_config][google.cloud.speech.v2.Recognizer.default_recognition_config]
  // of the Recognizer resource.
  RecognitionConfig config = 4;

  // The list of fields in
  // [config][google.cloud.speech.v2.BatchRecognizeRequest.config] that override
  // the values in the
  // [default_recognition_config][google.cloud.speech.v2.Recognizer.default_recognition_config]
  // of the recognizer during this recognition request. If no mask is provided,
  // all given fields in
  // [config][google.cloud.speech.v2.BatchRecognizeRequest.config] override the
  // values in the recognizer for this recognition request. If a mask is
  // provided, only the fields listed in the mask override the config in the
  // recognizer for this recognition request. If a wildcard (`*`) is provided,
  // [config][google.cloud.speech.v2.BatchRecognizeRequest.config] completely
  // overrides and replaces the config in the recognizer for this recognition
  // request.
  google.protobuf.FieldMask config_mask = 5;

  // Audio files with file metadata for ASR.
  repeated BatchRecognizeFileMetadata files = 3;
}

// Response message for
// [BatchRecognize][google.cloud.speech.v2.Speech.BatchRecognize] that is
// packaged into a longrunning [Operation][google.longrunning.Operation].
message BatchRecognizeResponse {
  // Map from filename to the final result for that file.
  map<string, BatchRecognizeFileResult> results = 1;
}

// Final results for a single file.
message BatchRecognizeFileResult {
  // The GCS URI to which recognition results were written.
  string uri = 1;

  // Error if one was encountered.
  google.rpc.Status error = 2;
}

// Metadata about transcription for a single file (for example, progress
// percent).
message BatchRecognizeTranscriptionMetadata {
  // How much of the file has been transcribed so far.
  int32 progress_percent = 1;

  // Error if one was encountered.
  google.rpc.Status error = 2;

  // The GCS URI to which recognition results will be written.
  string uri = 3;
}

// Operation metadata for
// [BatchRecognize][google.cloud.speech.v2.Speech.BatchRecognize].
message BatchRecognizeMetadata {
  // Map from provided filename to the transcription metadata for that file.
  map<string, BatchRecognizeTranscriptionMetadata> transcription_metadata = 1;
}

// Metadata about a single file in a batch for BatchRecognize.
message BatchRecognizeFileMetadata {
  // The audio source, which is a Google Cloud Storage URI.
  oneof audio_source {
    // Cloud Storage URI for the audio file.
    string uri = 1;
  }

  // Features and audio metadata to use for the Automatic Speech Recognition.
  // This field in combination with the
  // [config_mask][google.cloud.speech.v2.BatchRecognizeFileMetadata.config_mask]
  // field can be used to override parts of the
  // [default_recognition_config][google.cloud.speech.v2.Recognizer.default_recognition_config]
  // of the Recognizer resource as well as the
  // [config][google.cloud.speech.v2.BatchRecognizeRequest.config] at the
  // request level.
  RecognitionConfig config = 4;

  // The list of fields in
  // [config][google.cloud.speech.v2.BatchRecognizeFileMetadata.config] that
  // override the values in the
  // [default_recognition_config][google.cloud.speech.v2.Recognizer.default_recognition_config]
  // of the recognizer during this recognition request. If no mask is provided,
  // all non-default valued fields in
  // [config][google.cloud.speech.v2.BatchRecognizeFileMetadata.config] override
  // the values in the recognizer for this recognition request. If a mask is
  // provided, only the fields listed in the mask override the config in the
  // recognizer for this recognition request. If a wildcard (`*`) is provided,
  // [config][google.cloud.speech.v2.BatchRecognizeFileMetadata.config]
  // completely overrides and replaces the config in the recognizer for this
  // recognition request.
  google.protobuf.FieldMask config_mask = 5;
}

// A streaming speech recognition result corresponding to a portion of the audio
// that is currently being processed.
message StreamingRecognitionResult {
  // May contain one or more recognition hypotheses. These alternatives are
  // ordered in terms of accuracy, with the top (first) alternative being the
  // most probable, as ranked by the recognizer.
  repeated SpeechRecognitionAlternative alternatives = 1;

  // If `false`, this
  // [StreamingRecognitionResult][google.cloud.speech.v2.StreamingRecognitionResult]
  // represents an interim result that may change. If `true`, this is the final
  // time the speech service will return this particular
  // [StreamingRecognitionResult][google.cloud.speech.v2.StreamingRecognitionResult],
  // the recognizer will not return any further hypotheses for this portion of
  // the transcript and corresponding audio.
  bool is_final = 2;

  // An estimate of the likelihood that the recognizer will not change its guess
  // about this interim result. Values range from 0.0 (completely unstable)
  // to 1.0 (completely stable). This field is only provided for interim results
  // ([is_final][google.cloud.speech.v2.StreamingRecognitionResult.is_final]=`false`).
  // The default of 0.0 is a sentinel value indicating `stability` was not set.
  float stability = 3;

  // Time offset of the end of this result relative to the beginning of the
  // audio.
  google.protobuf.Duration result_end_offset = 4;

  // For multi-channel audio, this is the channel number corresponding to the
  // recognized result for the audio from that channel.
  // For
  // `audio_channel_count` = `N`, its output values can range from `1` to `N`.
  int32 channel_tag = 5;

  // Output only. The [BCP-47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt)
  // language tag of the language in this result. This language code was
  // detected to have the most likelihood of being spoken in the audio.
  string language_code = 6 [(google.api.field_behavior) = OUTPUT_ONLY];
}

// `StreamingRecognizeResponse` is the only message returned to the client by
// `StreamingRecognize`. A series of zero or more `StreamingRecognizeResponse`
// messages are streamed back to the client. If there is no recognizable
// audio then no messages are streamed back to the client.
//
// Here are some examples of `StreamingRecognizeResponse`s that might
// be returned while processing audio:
//
// 1. results { alternatives { transcript: "tube" } stability: 0.01 }
//
// 2. results { alternatives { transcript: "to be a" } stability: 0.01 }
//
// 3. results { alternatives { transcript: "to be" } stability: 0.9 }
//    results { alternatives { transcript: " or not to be" } stability: 0.01 }
//
// 4. results { alternatives { transcript: "to be or not to be"
//                             confidence: 0.92 }
//              alternatives { transcript: "to bee or not to bee" }
//              is_final: true }
//
// 5. results { alternatives { transcript: " that's" } stability: 0.01 }
//
// 6. results { alternatives { transcript: " that is" } stability: 0.9 }
//    results { alternatives { transcript: " the question" } stability: 0.01 }
//
// 7. results { alternatives { transcript: " that is the question"
//                             confidence: 0.98 }
//              alternatives { transcript: " that was the question" }
//              is_final: true }
//
// Notes:
//
// - Only two of the above responses #4 and #7 contain final results; they are
//   indicated by `is_final: true`. Concatenating these together generates the
//   full transcript: "to be or not to be that is the question".
//
// - The others contain interim `results`. #3 and #6 contain two interim
//   `results`: the first portion has a high stability and is less likely to
//   change; the second portion has a low stability and is very likely to
//   change. A UI designer might choose to show only high stability `results`.
//
// - The specific `stability` and `confidence` values shown above are only for
//   illustrative purposes. Actual values may vary.
//
// - In each response, only one of these fields will be set:
//     `error`,
//     `speech_event_type`, or
//     one or more (repeated) `results`.
message StreamingRecognizeResponse {
  // Indicates the type of speech event.
  enum SpeechEventType {
    // No speech event specified.
    SPEECH_EVENT_TYPE_UNSPECIFIED = 0;

    // This event indicates that the server has detected the end of the user's
    // speech utterance and expects no additional speech. Therefore, the server
    // will not process additional audio and will close the gRPC bidirectional
    // stream. This event is only sent if there was a force cutoff due to
    // silence being detected early. This event is only available through the
    // `latest_short` [model][google.cloud.speech.v2.Recognizer.model].
    END_OF_SINGLE_UTTERANCE = 1;

    // This event indicates that the server has detected the beginning of human
    // voice activity in the stream. This event can be returned multiple times
    // if speech starts and stops repeatedly throughout the stream. This event
    // is only sent if `voice_activity_events` is set to true.
    SPEECH_ACTIVITY_BEGIN = 2;

    // This event indicates that the server has detected the end of human voice
    // activity in the stream. This event can be returned multiple times if
    // speech starts and stops repeatedly throughout the stream. This event is
    // only sent if `voice_activity_events` is set to true.
    SPEECH_ACTIVITY_END = 3;
  }

  // This repeated list contains zero or more results that
  // correspond to consecutive portions of the audio currently being processed.
  // It contains zero or one
  // [is_final][google.cloud.speech.v2.StreamingRecognitionResult.is_final]=`true`
  // result (the newly settled portion), followed by zero or more
  // [is_final][google.cloud.speech.v2.StreamingRecognitionResult.is_final]=`false`
  // results (the interim results).
  repeated StreamingRecognitionResult results = 6;

  // Indicates the type of speech event.
  SpeechEventType speech_event_type = 3;

  // Time offset between the beginning of the audio and event emission.
  google.protobuf.Duration speech_event_offset = 7;

  // Metadata about the recognition.
  RecognitionResponseMetadata metadata = 5;
}

// Message representing the config for the Speech-to-Text API. This includes an
// optional [KMS key](https://cloud.google.com/kms/docs/resource-hierarchy#keys)
// with which incoming data will be encrypted.
message Config {
  option (google.api.resource) = {
    type: "speech.googleapis.com/Config"
    pattern: "projects/{project}/locations/{location}/config"
  };

  // Output only. The name of the config resource. There is exactly one config
  // resource per project per location. The expected format is
  // `projects/{project}/locations/{location}/config`.
  string name = 1 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Optional. An optional [KMS key
  // name](https://cloud.google.com/kms/docs/resource-hierarchy#keys) that if
  // present, will be used to encrypt Speech-to-Text resources at-rest. Updating
  // this key will not encrypt existing resources using this key; only new
  // resources will be encrypted using this key. The expected format is
  // `projects/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}`.
  string kms_key_name = 2 [
    (google.api.field_behavior) = OPTIONAL,
    (google.api.resource_reference) = {
      type: "cloudkms.googleapis.com/CryptoKey"
    }
  ];

  // Output only. The most recent time this resource was modified.
  google.protobuf.Timestamp update_time = 3
      [(google.api.field_behavior) = OUTPUT_ONLY];
}

// Request message for the
// [GetConfig][google.cloud.speech.v2.Speech.GetConfig] method.
message GetConfigRequest {
  // Required. The name of the config to retrieve. There is exactly one config
  // resource per project per location. The expected format is
  // `projects/{project}/locations/{location}/config`.
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = { type: "speech.googleapis.com/Config" }
  ];
}

// Request message for the
// [UpdateConfig][google.cloud.speech.v2.Speech.UpdateConfig] method.
message UpdateConfigRequest {
  // Required. The config to update.
  //
  // The config's `name` field is used to identify the config to be updated.
  // The expected format is `projects/{project}/locations/{location}/config`.
  Config config = 1 [(google.api.field_behavior) = REQUIRED];

  // The list of fields to be updated.
  google.protobuf.FieldMask update_mask = 2;
}

// CustomClass for biasing in speech recognition. Used to define a set of words
// or phrases that represents a common concept or theme likely to appear in your
// audio, for example a list of passenger ship names.
message CustomClass {
  option (google.api.resource) = {
    type: "speech.googleapis.com/CustomClass"
    pattern: "projects/{project}/locations/{location}/customClasses/{custom_class}"
    style: DECLARATIVE_FRIENDLY
  };

  // An item of the class.
  message ClassItem {
    // The class item's value.
    string value = 1;
  }

  // Set of states that define the lifecycle of a CustomClass.
  enum State {
    // Unspecified state.  This is only used/useful for distinguishing
    // unset values.
    STATE_UNSPECIFIED = 0;

    // The normal and active state.
    ACTIVE = 2;

    // This CustomClass has been deleted.
    DELETED = 4;
  }

  // Output only. The resource name of the CustomClass.
  // Format:
  // `projects/{project}/locations/{location}/customClasses/{custom_class}`.
  string name = 1 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. System-assigned unique identifier for the CustomClass.
  string uid = 2 [(google.api.field_behavior) = OUTPUT_ONLY];

  // User-settable, human-readable name for the CustomClass. Must be 63
  // characters or less.
  string display_name = 4;

  // A collection of class items.
  repeated ClassItem items = 5;

  // Output only. The CustomClass lifecycle state.
  State state = 15 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. Creation time.
  google.protobuf.Timestamp create_time = 6
      [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The most recent time this resource was modified.
  google.protobuf.Timestamp update_time = 7
      [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The time at which this resource was requested for deletion.
  google.protobuf.Timestamp delete_time = 8
      [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The time at which this resource will be purged.
  google.protobuf.Timestamp expire_time = 9
      [(google.api.field_behavior) = OUTPUT_ONLY];

  // Allows users to store small amounts of arbitrary data.
  // Both the key and the value must be 63 characters or less each.
  // At most 100 annotations.
  map<string, string> annotations = 10;

  // Output only. This checksum is computed by the server based on the value of
  // other fields. This may be sent on update, undelete, and delete requests to
  // ensure the client has an up-to-date value before proceeding.
  string etag = 11 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. Whether or not this CustomClass is in the process of being
  // updated.
  bool reconciling = 12 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The [KMS key
  // name](https://cloud.google.com/kms/docs/resource-hierarchy#keys) with which
  // the CustomClass is encrypted. The expected format is
  // `projects/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}`.
  string kms_key_name = 13 [
    (google.api.field_behavior) = OUTPUT_ONLY,
    (google.api.resource_reference) = {
      type: "cloudkms.googleapis.com/CryptoKey"
    }
  ];

  // Output only. The [KMS key version
  // name](https://cloud.google.com/kms/docs/resource-hierarchy#key_versions)
  // with which the CustomClass is encrypted. The expected format is
  // `projects/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}/cryptoKeyVersions/{crypto_key_version}`.
  string kms_key_version_name = 14 [
    (google.api.field_behavior) = OUTPUT_ONLY,
    (google.api.resource_reference) = {
      type: "cloudkms.googleapis.com/CryptoKeyVersion"
    }
  ];
}

// PhraseSet for biasing in speech recognition. A PhraseSet is used to provide
// "hints" to the speech recognizer to favor specific words and phrases in the
// results.
message PhraseSet {
  option (google.api.resource) = {
    type: "speech.googleapis.com/PhraseSet"
    pattern: "projects/{project}/locations/{location}/phraseSets/{phrase_set}"
    style: DECLARATIVE_FRIENDLY
  };

  // A Phrase contains words and phrase "hints" so that the speech recognition
  // is more likely to recognize them. This can be used to improve the accuracy
  // for specific words and phrases, for example, if specific commands are
  // typically spoken by the user. This can also be used to add additional words
  // to the vocabulary of the recognizer.
  //
  // List items can also include CustomClass references containing groups of
  // words that represent common concepts that occur in natural language.
  message Phrase {
    // The phrase itself.
    string value = 1;

    // Hint Boost. Overrides the boost set at the phrase set level.
    // Positive value will increase the probability that a specific phrase will
    // be recognized over other similar sounding phrases. The higher the boost,
    // the higher the chance of false positive recognition as well. Negative
    // boost values would correspond to anti-biasing. Anti-biasing is not
    // enabled, so negative boost will simply be ignored. Though `boost` can
    // accept a wide range of positive values, most use cases are best served
    // with values between 0 and 20. We recommend using a binary search approach
    // to finding the optimal value for your use case. Speech recognition
    // will skip PhraseSets with a boost value of 0.
    float boost = 2;
  }

  // Set of states that define the lifecycle of a PhraseSet.
  enum State {
    // Unspecified state.  This is only used/useful for distinguishing
    // unset values.
    STATE_UNSPECIFIED = 0;

    // The normal and active state.
    ACTIVE = 2;

    // This PhraseSet has been deleted.
    DELETED = 4;
  }

  // Output only. The resource name of the PhraseSet.
  // Format: `projects/{project}/locations/{location}/phraseSets/{phrase_set}`.
  string name = 1 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. System-assigned unique identifier for the PhraseSet.
  string uid = 2 [(google.api.field_behavior) = OUTPUT_ONLY];

  // A list of word and phrases.
  repeated Phrase phrases = 3;

  // Hint Boost. Positive value will increase the probability that a specific
  // phrase will be recognized over other similar sounding phrases. The higher
  // the boost, the higher the chance of false positive recognition as well.
  // Valid `boost` values are between 0 (exclusive) and 20. We recommend using a
  // binary search approach to finding the optimal value for your use case.
  float boost = 4;

  // User-settable, human-readable name for the PhraseSet. Must be 63
  // characters or less.
  string display_name = 5;

  // Output only. The PhraseSet lifecycle state.
  State state = 15 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. Creation time.
  google.protobuf.Timestamp create_time = 6
      [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The most recent time this resource was modified.
  google.protobuf.Timestamp update_time = 7
      [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The time at which this resource was requested for deletion.
  google.protobuf.Timestamp delete_time = 8
      [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The time at which this resource will be purged.
  google.protobuf.Timestamp expire_time = 9
      [(google.api.field_behavior) = OUTPUT_ONLY];

  // Allows users to store small amounts of arbitrary data.
  // Both the key and the value must be 63 characters or less each.
  // At most 100 annotations.
  map<string, string> annotations = 10;

  // Output only. This checksum is computed by the server based on the value of
  // other fields. This may be sent on update, undelete, and delete requests to
  // ensure the client has an up-to-date value before proceeding.
  string etag = 11 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. Whether or not this PhraseSet is in the process of being
  // updated.
  bool reconciling = 12 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The [KMS key
  // name](https://cloud.google.com/kms/docs/resource-hierarchy#keys) with which
  // the PhraseSet is encrypted. The expected format is
  // `projects/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}`.
  string kms_key_name = 13 [
    (google.api.field_behavior) = OUTPUT_ONLY,
    (google.api.resource_reference) = {
      type: "cloudkms.googleapis.com/CryptoKey"
    }
  ];

  // Output only. The [KMS key version
  // name](https://cloud.google.com/kms/docs/resource-hierarchy#key_versions)
  // with which the PhraseSet is encrypted. The expected format is
  // `projects/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}/cryptoKeyVersions/{crypto_key_version}`.
  string kms_key_version_name = 14 [
    (google.api.field_behavior) = OUTPUT_ONLY,
    (google.api.resource_reference) = {
      type: "cloudkms.googleapis.com/CryptoKeyVersion"
    }
  ];
}

// Request message for the
// [CreateCustomClass][google.cloud.speech.v2.Speech.CreateCustomClass] method.
message CreateCustomClassRequest {
  // Required. The CustomClass to create.
  CustomClass custom_class = 1 [(google.api.field_behavior) = REQUIRED];

  // If set, validate the request and preview the CustomClass, but do not
  // actually create it.
  bool validate_only = 2;

  // The ID to use for the CustomClass, which will become the final component of
  // the CustomClass's resource name.
  //
  // This value should be 4-63 characters, and valid characters
  // are /[a-z][0-9]-/.
  string custom_class_id = 3;

  // Required. The project and location where this CustomClass will be created.
  // The expected format is `projects/{project}/locations/{location}`.
  string parent = 4 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      child_type: "speech.googleapis.com/CustomClass"
    }
  ];
}

// Request message for the
// [ListCustomClasses][google.cloud.speech.v2.Speech.ListCustomClasses] method.
message ListCustomClassesRequest {
  // Required. The project and location of CustomClass resources to list. The
  // expected format is `projects/{project}/locations/{location}`.
  string parent = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      type: "locations.googleapis.com/Location"
    }
  ];

  // Number of results per requests. A valid page_size ranges from 0 to 20
  // inclusive. If the page_size is zero or unspecified, a page size of 5 will
  // be chosen. If the page size exceeds 20, it will be coerced down to 20. Note
  // that a call might return fewer results than the requested page size.
  int32 page_size = 2;

  // A page token, received from a previous
  // [ListCustomClasses][google.cloud.speech.v2.Speech.ListCustomClasses] call.
  // Provide this to retrieve the subsequent page.
  //
  // When paginating, all other parameters provided to
  // [ListCustomClasses][google.cloud.speech.v2.Speech.ListCustomClasses] must
  // match the call that provided the page token.
  string page_token = 3;

  // Whether, or not, to show resources that have been deleted.
  bool show_deleted = 4;
}

// Response message for the
// [ListCustomClasses][google.cloud.speech.v2.Speech.ListCustomClasses] method.
message ListCustomClassesResponse {
  // The list of requested CustomClasses.
  repeated CustomClass custom_classes = 1;

  // A token, which can be sent as
  // [page_token][google.cloud.speech.v2.ListCustomClassesRequest.page_token] to
  // retrieve the next page. If this field is omitted, there are no subsequent
  // pages. This token expires after 72 hours.
  string next_page_token = 2;
}

// Request message for the
// [GetCustomClass][google.cloud.speech.v2.Speech.GetCustomClass] method.
message GetCustomClassRequest {
  // Required. The name of the CustomClass to retrieve. The expected format is
  // `projects/{project}/locations/{location}/customClasses/{custom_class}`.
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      type: "speech.googleapis.com/CustomClass"
    }
  ];
}

// Request message for the
// [UpdateCustomClass][google.cloud.speech.v2.Speech.UpdateCustomClass] method.
message UpdateCustomClassRequest {
  // Required. The CustomClass to update.
  //
  // The CustomClass's `name` field is used to identify the CustomClass to
  // update. Format:
  // `projects/{project}/locations/{location}/customClasses/{custom_class}`.
  CustomClass custom_class = 1 [(google.api.field_behavior) = REQUIRED];

  // The list of fields to be updated. If empty, all fields are considered for
  // update.
  google.protobuf.FieldMask update_mask = 2;

  // If set, validate the request and preview the updated CustomClass, but do
  // not actually update it.
  bool validate_only = 4;
}

// Request message for the
// [DeleteCustomClass][google.cloud.speech.v2.Speech.DeleteCustomClass] method.
message DeleteCustomClassRequest {
  // Required. The name of the CustomClass to delete.
  // Format:
  // `projects/{project}/locations/{location}/customClasses/{custom_class}`
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      type: "speech.googleapis.com/CustomClass"
    }
  ];

  // If set, validate the request and preview the deleted CustomClass, but do
  // not actually delete it.
  bool validate_only = 2;

  // If set to true, and the CustomClass is not found, the request will succeed
  // and  be a no-op (no Operation is recorded in this case).
  bool allow_missing = 4;

  // This checksum is computed by the server based on the value of other
  // fields. This may be sent on update, undelete, and delete requests to ensure
  // the client has an up-to-date value before proceeding.
  string etag = 3;
}

// Request message for the
// [UndeleteCustomClass][google.cloud.speech.v2.Speech.UndeleteCustomClass]
// method.
message UndeleteCustomClassRequest {
  // Required. The name of the CustomClass to undelete.
  // Format:
  // `projects/{project}/locations/{location}/customClasses/{custom_class}`
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      type: "speech.googleapis.com/CustomClass"
    }
  ];

  // If set, validate the request and preview the undeleted CustomClass, but do
  // not actually undelete it.
  bool validate_only = 3;

  // This checksum is computed by the server based on the value of other
  // fields. This may be sent on update, undelete, and delete requests to ensure
  // the client has an up-to-date value before proceeding.
  string etag = 4;
}

// Request message for the
// [CreatePhraseSet][google.cloud.speech.v2.Speech.CreatePhraseSet] method.
message CreatePhraseSetRequest {
  // Required. The PhraseSet to create.
  PhraseSet phrase_set = 1 [(google.api.field_behavior) = REQUIRED];

  // If set, validate the request and preview the PhraseSet, but do not
  // actually create it.
  bool validate_only = 2;

  // The ID to use for the PhraseSet, which will become the final component of
  // the PhraseSet's resource name.
  //
  // This value should be 4-63 characters, and valid characters
  // are /[a-z][0-9]-/.
  string phrase_set_id = 3;

  // Required. The project and location where this PhraseSet will be created.
  // The expected format is `projects/{project}/locations/{location}`.
  string parent = 4 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      child_type: "speech.googleapis.com/PhraseSet"
    }
  ];
}

// Request message for the
// [ListPhraseSets][google.cloud.speech.v2.Speech.ListPhraseSets] method.
message ListPhraseSetsRequest {
  // Required. The project and location of PhraseSet resources to list. The
  // expected format is `projects/{project}/locations/{location}`.
  string parent = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      type: "locations.googleapis.com/Location"
    }
  ];

  // The maximum number of PhraseSets to return. The service may return fewer
  // than this value. If unspecified, at most 20 PhraseSets will be returned.
  // The maximum value is 20; values above 20 will be coerced to 20.
  int32 page_size = 2;

  // A page token, received from a previous
  // [ListPhraseSets][google.cloud.speech.v2.Speech.ListPhraseSets] call.
  // Provide this to retrieve the subsequent page.
  //
  // When paginating, all other parameters provided to
  // [ListPhraseSets][google.cloud.speech.v2.Speech.ListPhraseSets] must match
  // the call that provided the page token.
  string page_token = 3;

  // Whether, or not, to show resources that have been deleted.
  bool show_deleted = 4;
}

// Response message for the
// [ListPhraseSets][google.cloud.speech.v2.Speech.ListPhraseSets] method.
message ListPhraseSetsResponse {
  // The list of requested PhraseSets.
  repeated PhraseSet phrase_sets = 1;

  // A token, which can be sent as
  // [page_token][google.cloud.speech.v2.ListPhraseSetsRequest.page_token] to
  // retrieve the next page. If this field is omitted, there are no subsequent
  // pages. This token expires after 72 hours.
  string next_page_token = 2;
}

// Request message for the
// [GetPhraseSet][google.cloud.speech.v2.Speech.GetPhraseSet] method.
message GetPhraseSetRequest {
  // Required. The name of the PhraseSet to retrieve. The expected format is
  // `projects/{project}/locations/{location}/phraseSets/{phrase_set}`.
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      type: "speech.googleapis.com/PhraseSet"
    }
  ];
}

// Request message for the
// [UpdatePhraseSet][google.cloud.speech.v2.Speech.UpdatePhraseSet] method.
message UpdatePhraseSetRequest {
  // Required. The PhraseSet to update.
  //
  // The PhraseSet's `name` field is used to identify the PhraseSet to update.
  // Format: `projects/{project}/locations/{location}/phraseSets/{phrase_set}`.
  PhraseSet phrase_set = 1 [(google.api.field_behavior) = REQUIRED];

  // The list of fields to update. If empty, all non-default valued fields are
  // considered for update. Use `*` to update the entire PhraseSet resource.
  google.protobuf.FieldMask update_mask = 2;

  // If set, validate the request and preview the updated PhraseSet, but do not
  // actually update it.
  bool validate_only = 4;
}

// Request message for the
// [DeletePhraseSet][google.cloud.speech.v2.Speech.DeletePhraseSet] method.
message DeletePhraseSetRequest {
  // Required. The name of the PhraseSet to delete.
  // Format: `projects/{project}/locations/{location}/phraseSets/{phrase_set}`
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      type: "speech.googleapis.com/PhraseSet"
    }
  ];

  // If set, validate the request and preview the deleted PhraseSet, but do not
  // actually delete it.
  bool validate_only = 2;

  // If set to true, and the PhraseSet is not found, the request will succeed
  // and  be a no-op (no Operation is recorded in this case).
  bool allow_missing = 4;

  // This checksum is computed by the server based on the value of other
  // fields. This may be sent on update, undelete, and delete requests to ensure
  // the client has an up-to-date value before proceeding.
  string etag = 3;
}

// Request message for the
// [UndeletePhraseSet][google.cloud.speech.v2.Speech.UndeletePhraseSet]
// method.
message UndeletePhraseSetRequest {
  // Required. The name of the PhraseSet to undelete.
  // Format: `projects/{project}/locations/{location}/phraseSets/{phrase_set}`
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      type: "speech.googleapis.com/PhraseSet"
    }
  ];

  // If set, validate the request and preview the undeleted PhraseSet, but do
  // not actually undelete it.
  bool validate_only = 3;

  // This checksum is computed by the server based on the value of other
  // fields. This may be sent on update, undelete, and delete requests to ensure
  // the client has an up-to-date value before proceeding.
  string etag = 4;
}