31 lines
758 B
Markdown
31 lines
758 B
Markdown
---
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layout: default
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title: Packets
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parent: Framework Concepts
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nav_order: 3
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---
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# Packets
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{: .no_toc }
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1. TOC
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{:toc}
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---
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Each calculator is a node of of a graph. We describe how to create a new calculator, how to initialize a calculator, how to perform its calculations, input and output streams, timestamps, and options
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## Creating a packet
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Packets are generally created with `MediaPipe::Adopt()` (from packet.h).
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```c++
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// Create some data.
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auto data = absl::make_unique<MyDataClass>("constructor_argument");
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// Create a packet to own the data.
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Packet p = Adopt(data.release());
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// Make a new packet with the same data and a different timestamp.
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Packet p2 = p.At(Timestamp::PostStream());
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```
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Data within a packet is accessed with `Packet::Get<T>()`
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