// Copyright 2025 Envoy Project Authors
//
// 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 envoy.extensions.compression.zstd.decompressor.v3;

import "envoy/config/core/v3/base.proto";

import "google/protobuf/wrappers.proto";

import "udpa/annotations/status.proto";
import "validate/validate.proto";

option java_package = "io.envoyproxy.envoy.extensions.compression.zstd.decompressor.v3";
option java_outer_classname = "ZstdProto";
option java_multiple_files = true;
option go_package = "github.com/envoyproxy/go-control-plane/envoy/extensions/compression/zstd/decompressor/v3;decompressorv3";
option (udpa.annotations.file_status).package_version_status = ACTIVE;

// [#protodoc-title: Zstd Decompressor]
// [#extension: envoy.compression.zstd.decompressor]

message Zstd {
  // Dictionaries for decompression. Zstd offers dictionary compression, which greatly improves
  // efficiency on small files and messages. It is necessary to ensure that the dictionary used for
  // decompression is the same as the compression dictionary. Multiple dictionaries can be set, and the
  // dictionary will be automatically selected for decompression according to the dictionary ID in the
  // source content.
  // Please refer to `zstd manual <https://github.com/facebook/zstd/blob/dev/programs/zstd.1.md#dictionary-builder>`_
  // to train specific dictionaries for decompression.
  repeated config.core.v3.DataSource dictionaries = 1;

  // Value for decompressor's next output buffer. If not set, defaults to 4096.
  google.protobuf.UInt32Value chunk_size = 2 [(validate.rules).uint32 = {lte: 65536 gte: 4096}];
}
