4.misc.metadata

C++ Sample: 4.misc.metadata

Overview

Use the SDK interface to get the frameSet, then get the frame from frameSet, print the value of the frame metadata and exit the program using the ESC_KEY key.

Knowledge

Pipeline is a pipeline for processing data streams, providing multi-channel stream configuration, switching, frame aggregation, and frame synchronization functions.

Frameset is a combination of different types of Frames.

Metadata is used to describe the various properties and states of a frame.

Code overview

1. Create an ob::Pipeline object, and start the pipeline.

   // Create a pipeline.
   ob::Pipeline pipe;
   
   // Start the pipeline with default config.
   // Modify the default configuration by the configuration file: "OrbbecSDKConfig.xml"
   pipe.start();

2. Get frameSet from pipeline.

   // Wait for frameSet from the pipeline, the default timeout is 1000ms.
   auto frameSet   = pipe.waitForFrameset();

3. Get frame from frameSet.

   auto frameCount = frameSet->getCount();
   for(uint32_t i = 0; i < frameCount; i++) {
       // Get the frame from frameSet
       auto frame = frameSet->getFrame(i);
   }

4. Check if the frame object contains metadata, then retrieve it.

   // Get the metadata of the frame
   for(uint32_t j = 0; j < static_cast<uint32_t>(metadataCount); j++) {
       // If the frame has the metadata, get the metadata value
       if(frame->hasMetadata(static_cast<OBFrameMetadataType>(j))) {
           std::cout << "metadata type: " << std::left << std::setw(50) << metadataTypeMap[j]
                     << " metadata value: " << frame->getMetadataValue(static_cast<OBFrameMetadataType>(j)) << std::endl;
       }
   }

5. Stop pipeline

   // Stop the Pipeline, no frame data will be generated
   pipe.stop();

Run Sample

Press the Esc key in the window to exit the program.

Result