// Copyright 2019 The MediaPipe 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.
//
// Forked from mediapipe/framework/tool/source.proto.
// The forked proto must remain identical to the original proto and should be
// ONLY used by mediapipe open source project.

syntax = "proto2";

package mediapipe;

import "mediapipe/framework/calculator.proto";

message SidePacketsToStreamsCalculatorOptions {
  extend CalculatorOptions {
    optional SidePacketsToStreamsCalculatorOptions ext = 60982839;
  }

  // Number of side packets which are fed to graph internal streams.
  optional int32 num_inputs = 1 [default = 1];
  // We need to accommodate various timestamp modes depending on what
  // we're connecting to.
  enum SetTimestampMode {
    // For vectors of packets, the timestamp is the index of the packet
    // within the vector.  For single packets, the timestamp is zero.
    VECTOR_INDEX = 0;
    // Timestamps are always set to PreStream.
    PRE_STREAM = 1;
    // Timestamps are always set to PostStream.
    // TODO Rename to POST_STREAM.
    WHOLE_STREAM = 2;
    // Do not set timestamp.  Can only be used if vectors_of_packets is
    // true.  Will cause Timestamp::Unset() run-time errors if the inner
    // packets in the vectors do not already have Timestamps.
    NONE = 3;
  }
  // If true, then a timestamp is set for each packet.
  optional SetTimestampMode set_timestamp = 2 [default = VECTOR_INDEX];
  // If true, then side packets are vectors of packets; otherwise,
  // they are single packets.
  optional bool vectors_of_packets = 3 [default = true];
}