68 lines
2.3 KiB
C++
68 lines
2.3 KiB
C++
// Copyright 2019 The MediaPipe Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// A simple example to print out "Hello World!" from a MediaPipe graph.
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#include "mediapipe/framework/calculator_graph.h"
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#include "mediapipe/framework/port/logging.h"
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#include "mediapipe/framework/port/parse_text_proto.h"
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#include "mediapipe/framework/port/status.h"
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namespace mediapipe {
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absl::Status PrintHelloWorld() {
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// Configures a simple graph, which concatenates 2 PassThroughCalculators.
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CalculatorGraphConfig config =
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ParseTextProtoOrDie<CalculatorGraphConfig>(R"pb(
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input_stream: "in"
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output_stream: "out"
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node {
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calculator: "PassThroughCalculator"
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input_stream: "in"
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output_stream: "out1"
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}
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node {
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calculator: "PassThroughCalculator"
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input_stream: "out1"
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output_stream: "out"
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}
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)pb");
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CalculatorGraph graph;
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MP_RETURN_IF_ERROR(graph.Initialize(config));
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ASSIGN_OR_RETURN(OutputStreamPoller poller,
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graph.AddOutputStreamPoller("out"));
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MP_RETURN_IF_ERROR(graph.StartRun({}));
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// Give 10 input packets that contains the same std::string "Hello World!".
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for (int i = 0; i < 10; ++i) {
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MP_RETURN_IF_ERROR(graph.AddPacketToInputStream(
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"in", MakePacket<std::string>("Hello World!").At(Timestamp(i))));
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}
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// Close the input stream "in".
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MP_RETURN_IF_ERROR(graph.CloseInputStream("in"));
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mediapipe::Packet packet;
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// Get the output packets std::string.
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while (poller.Next(&packet)) {
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LOG(INFO) << packet.Get<std::string>();
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}
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return graph.WaitUntilDone();
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}
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} // namespace mediapipe
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int main(int argc, char** argv) {
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google::InitGoogleLogging(argv[0]);
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CHECK(mediapipe::PrintHelloWorld().ok());
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return 0;
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}
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