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https://github.com/hartwork/audio_pump_demo

:studio_microphone: Demos pumping audio from the microphone to headphones/speakers in C99 for PulseAudio, PortAudio and SDL 2
https://github.com/hartwork/audio_pump_demo

audio audio-player audio-processing audio-recorder c c99 microphone microphone-audio-capture microphone-audio-recorder microphone-to-speaker portaudio pulseaudio sdl sdl2

Last synced: about 19 hours ago
JSON representation

:studio_microphone: Demos pumping audio from the microphone to headphones/speakers in C99 for PulseAudio, PortAudio and SDL 2

Host: GitHub
URL: https://github.com/hartwork/audio_pump_demo
Owner: hartwork
License: gpl-3.0
Created: 2023-01-03T16:44:49.000Z (about 2 years ago)
Default Branch: master
Last Pushed: 2024-10-28T22:41:31.000Z (3 months ago)
Last Synced: 2025-01-11T15:17:40.972Z (29 days ago)
Topics: audio, audio-player, audio-processing, audio-recorder, c, c99, microphone, microphone-audio-capture, microphone-audio-recorder, microphone-to-speaker, portaudio, pulseaudio, sdl, sdl2
Language: C
Homepage:
Size: 64.5 KB
Stars: 1
Watchers: 3
Forks: 0
Open Issues: 0
Metadata Files:
- Readme: README.md
- License: COPYING

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README

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# Audio pump demo (for PulseAudio, PortAudio and SDL 2)

This repository demos pumping audio

from the default input device (e.g. a microphone)

to the default output device (e.g. headphones/speakers)

in C99.

In other words: this demo records audio, and it plays back audio.

There are four editions:

- one for [PortAudio](https://github.com/PortAudio/portaudio) using asynchronous callbacks —

  [`portaudio_async_pump_demo.c`](https://github.com/hartwork/audio_pump_demo/blob/master/portaudio_async_pump_demo.c),

- one for [SDL 2](https://wiki.libsdl.org/SDL2/FrontPage) —

  [`sdl2_audio_pump_demo.c`](https://github.com/hartwork/audio_pump_demo/blob/master/sdl2_audio_pump_demo.c),

- one for the [Simple API](https://freedesktop.org/software/pulseaudio/doxygen/simple.html) of PulseAudio —

  [`pulseaudio_simple_pump_demo.c`](https://github.com/hartwork/audio_pump_demo/blob/master/pulseaudio_simple_pump_demo.c),

- one for the [Asynchronous API](https://freedesktop.org/software/pulseaudio/doxygen/async.html) of PulseAudio —

  [`pulseaudio_async_pump_demo.c`](https://github.com/hartwork/audio_pump_demo/blob/master/pulseaudio_async_pump_demo.c).

The code is Software Libre licensed under GPL v3 or later.

# Requirements

- libpulse

- libpulse-simple

- PortAudio

- SDL 2.x

e.g.:

```console

# sudo apt install --no-install-recommends --yes -V \

    build-essential \

    libpulse-dev \

    libsdl2-dev \

    portaudio19-dev

```

# Compilation

```console

# make CFLAGS='-O2 -pipe' -j

# ./portaudio_async_pump_demo

# ./pulseaudio_async_pump_demo

# ./pulseaudio_simple_pump_demo

# ./sdl2_audio_pump_demo

```

# Hotkeys

- Ctrl+C — exit