librespot/playback/src/audio_backend/mod.rs
2021-01-25 09:04:33 +01:00

92 lines
2.4 KiB
Rust

use std::io;
pub trait Open {
fn open(_: Option<String>) -> Self;
}
pub trait Sink {
fn start(&mut self) -> io::Result<()>;
fn stop(&mut self) -> io::Result<()>;
fn write(&mut self, data: &[i16]) -> io::Result<()>;
}
pub type SinkBuilder = fn(Option<String>) -> Box<dyn Sink + Send>;
fn mk_sink<S: Sink + Open + Send + 'static>(device: Option<String>) -> Box<dyn Sink + Send> {
Box::new(S::open(device))
}
#[cfg(feature = "alsa-backend")]
mod alsa;
#[cfg(feature = "alsa-backend")]
use self::alsa::AlsaSink;
#[cfg(feature = "portaudio-backend")]
mod portaudio;
#[cfg(feature = "portaudio-backend")]
use self::portaudio::PortAudioSink;
#[cfg(feature = "pulseaudio-backend")]
mod pulseaudio;
#[cfg(feature = "pulseaudio-backend")]
use self::pulseaudio::PulseAudioSink;
#[cfg(feature = "jackaudio-backend")]
mod jackaudio;
#[cfg(feature = "jackaudio-backend")]
use self::jackaudio::JackSink;
#[cfg(feature = "gstreamer-backend")]
mod gstreamer;
#[cfg(feature = "gstreamer-backend")]
use self::gstreamer::GstreamerSink;
#[cfg(feature = "rodio-backend")]
mod rodio;
#[cfg(feature = "rodio-backend")]
use self::rodio::RodioSink;
#[cfg(feature = "sdl-backend")]
mod sdl;
#[cfg(feature = "sdl-backend")]
use self::sdl::SdlSink;
mod pipe;
use self::pipe::StdoutSink;
mod subprocess;
use self::subprocess::SubprocessSink;
pub const BACKENDS: &'static [(&'static str, SinkBuilder)] = &[
#[cfg(feature = "alsa-backend")]
("alsa", mk_sink::<AlsaSink>),
#[cfg(feature = "portaudio-backend")]
("portaudio", mk_sink::<PortAudioSink>),
#[cfg(feature = "pulseaudio-backend")]
("pulseaudio", mk_sink::<PulseAudioSink>),
#[cfg(feature = "jackaudio-backend")]
("jackaudio", mk_sink::<JackSink>),
#[cfg(feature = "gstreamer-backend")]
("gstreamer", mk_sink::<GstreamerSink>),
#[cfg(feature = "rodio-backend")]
("rodio", mk_sink::<RodioSink>),
#[cfg(feature = "sdl-backend")]
("sdl", mk_sink::<SdlSink>),
("pipe", mk_sink::<StdoutSink>),
("subprocess", mk_sink::<SubprocessSink>),
];
pub fn find(name: Option<String>) -> Option<SinkBuilder> {
if let Some(name) = name {
BACKENDS
.iter()
.find(|backend| name == backend.0)
.map(|backend| backend.1)
} else {
Some(
BACKENDS
.first()
.expect("No backends were enabled at build time")
.1,
)
}
}