https://github.com/seniorjoinu/wirehair-wrapper

Wirehair wrapper for Kotlin - O(N) Fountain Code for Large Data
https://github.com/seniorjoinu/wirehair-wrapper

fast fec fountain-codes kotlin

Last synced: about 5 hours ago
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Wirehair wrapper for Kotlin - O(N) Fountain Code for Large Data

• Host: GitHub
• URL: https://github.com/seniorjoinu/wirehair-wrapper
• Owner: seniorjoinu
• Created: 2019-04-05T15:26:57.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2022-01-15T15:30:21.000Z (almost 3 years ago)
• Last Synced: 2023-03-11T15:03:46.152Z (over 1 year ago)
• Topics: fast, fec, fountain-codes, kotlin
• Language: Kotlin
• Homepage:
• Size: 366 KB
• Stars: 2
• Watchers: 3
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
## Wirehair Kotlin Wrapper

Kotlin wrapper for amazing [catid/wirehair](https://github.com/catid/wirehair)

Works under:

* `linux-x86-64`

* `win32-x86-64`

### Example

```kotlin

// initializing wirehair

Wirehair.init()

// setting sizes

val kPacketSize = 1400

val kMessageBytes = 1000 * 1000 + 333

// creating the message

val message = ByteBuffer.allocateDirect(kMessageBytes) as DirectBuffer

// creating encoder and decoder and releasing them after all stuff is done

Wirehair.Encoder(message, kMessageBytes, kPacketSize).use { encoder ->

    Wirehair.Decoder(kMessageBytes, kPacketSize).use { decoder ->

        var blockId = 0

        while (true) {

            // generating unique blockId

            blockId++

            // generating repair block

            val block = ByteArray(kPacketSize)

            val writeLen = encoder.encode(blockId, block, kPacketSize)

            // imitating 10 percent packet drop

            if (blockId % 10 == 0) continue

            // accumulating repair blocks

            val enough = decoder.decode(blockId, block, writeLen)

            if (enough) break

        }

        // decoding message from accumulated repair blocks

        val decoded = ByteArray(kMessageBytes)

        decoder.recover(decoded, kMessageBytes)

    }

}

```

### Install

Use [Jitpack](https://jitpack.io/)

### Help

Feel free to open an issue or suggest a PR

### TODO

* Bundle `jar` with binaries for major platforms

* Add other functions to the high level wrapper