Features

High-level features

See also

Forward Erasure Correction codes, Frequency estimator and resampler

  • streaming CD-quality audio using RTP

  • maintaining pre-configured fixed or bounded latency

  • restoring lost packets using Forward Erasure Correction codes

    • communicating redundant packets using FECFRAME

    • encoding and decoding using OpenFEC

  • resampling

    • converting between the sender and receiver clock domains to compensate clock drift

    • converting between the network and input/output sample rates

    • configurable resampler backends and profiles for different CPU and quality requirements

  • multiplexing

    • mixing simultaneous streams from multiple senders on the receiver

    • binding receiver to multiple ports with different protocols

    • connecting sender to multiple receivers with different protocols

  • support for unicast, multicast, and broadcast

  • interleaving packets to increase chances of successful loss recovery

  • session watchdog

    • detecting session shutdown and removing the session

    • detecting playback problems and restarting the session

Protocols and encodings

See also

Network protocols

  • RTP

    • RTP AVPF L16 encoding (lossless 44100Hz PCM 16-bit stereo or mono)

  • RTCP

  • RTCP XR

  • FECFRAME

    • Reed-Solomon (m=8) FEC scheme (lower latency, lower rates)

    • LDPC-Staircase FEC scheme (higher latency, higher rates)

API and tools

See also

API, Command-line tools, Sound server modules, Applications

  • transport API

    • roc_sender — send audio stream to receiver

    • roc_receiver — receive and mix audio streams from senders

  • codec API

    • roc_sender_encoder — encode audio stream into packets

    • roc_receiver_decoder — decode audio stream from packets

  • command-line tools

    • roc-send — read audio stream from audio device or file and send to receiver

    • roc-recv — receive and mix audio streams from senders and write to audio device or file

    • roc-copy — copy audio between local audio devices or files

  • PipeWire modules

    • roc-sink — send audio stream written to the sink to receiver

    • roc-source — receive and mix audio streams from senders and write to the connected apps

  • PulseAudio modules

    • module-roc-sink — send audio stream written to the sink to receiver

    • module-roc-sink-input — receive and mix audio streams from senders and write to the connected sink

  • macOS virtual device

    • roc-vad — streaming audio device with CLI and gRPC interface

  • mobile apps

    • Roc Droid – Android app that connects your phone to other Roc senders and receivers

Bindings

See also

Bindings

  • supported languages:

    • C (or C++)

    • Go

    • Java

Portability

See also

Supported platforms, Tested devices

  • supported operating systems

    • GNU/Linux

    • macOS

    • Android

  • tested hardware architectures

    • x86_64

    • i686

    • ARM

    • MIPS