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Merge pull request #283 from matikij/sdl-backend

Browse source 
add SDL backend based on sdl2 crate
This commit is contained in:
Sasha Hilton 2019-04-12 05:43:52 +02:00 committed by GitHub
commit 6c4311fe72
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6 changed files with 113 additions and 0 deletions
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45
Cargo.lock generated
View file

@ -845,6 +845,7 @@ dependencies = [
"log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
"portaudio-rs 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
"rodio 0.8.1 (git+https://github.com/tomaka/rodio)",
"sdl2 0.32.1 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
@ -1050,6 +1051,16 @@ dependencies = [
"memchr 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "num"
version = "0.1.42"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"num-integer 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
"num-iter 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
"num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "num-bigint"
version = "0.1.44"
@ -1069,6 +1080,15 @@ dependencies = [
"num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "num-iter"
version = "0.1.37"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"num-integer 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
"num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "num-traits"
version = "0.1.43"
@ -1486,6 +1506,27 @@ name = "scopeguard"
version = "0.3.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "sdl2"
version = "0.32.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
"lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
"libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)",
"num 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
"rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
"sdl2-sys 0.32.5 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "sdl2-sys"
version = "0.32.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"cfg-if 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "semver"
version = "0.9.0"
@ -2302,8 +2343,10 @@ dependencies = [
"checksum nix 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a2c5afeb0198ec7be8569d666644b574345aad2e95a53baf3a532da3e0f3fb32"
"checksum nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)" = "2f9667ddcc6cc8a43afc9b7917599d7216aa09c463919ea32c59ed6cac8bc945"
"checksum nom 3.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "05aec50c70fd288702bcd93284a8444607f3292dbdf2a30de5ea5dcdbe72287b"
"checksum num 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "4703ad64153382334aa8db57c637364c322d3372e097840c72000dabdcf6156e"
"checksum num-bigint 0.1.44 (registry+https://github.com/rust-lang/crates.io-index)" = "e63899ad0da84ce718c14936262a41cee2c79c981fc0a0e7c7beb47d5a07e8c1"
"checksum num-integer 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)" = "e83d528d2677f0518c570baf2b7abdcf0cd2d248860b68507bdcb3e91d4c0cea"
"checksum num-iter 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)" = "af3fdbbc3291a5464dc57b03860ec37ca6bf915ed6ee385e7c6c052c422b2124"
"checksum num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)" = "92e5113e9fd4cc14ded8e499429f396a20f98c772a47cc8622a736e1ec843c31"
"checksum num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "0b3a5d7cc97d6d30d8b9bc8fa19bf45349ffe46241e8816f50f62f6d6aaabee1"
"checksum num_cpus 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1a23f0ed30a54abaa0c7e83b1d2d87ada7c3c23078d1d87815af3e3b6385fbba"
@ -2355,6 +2398,8 @@ dependencies = [
"checksum safemem 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8dca453248a96cb0749e36ccdfe2b0b4e54a61bfef89fb97ec621eb8e0a93dd9"
"checksum scoped-tls 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "332ffa32bf586782a3efaeb58f127980944bbc8c4d6913a86107ac2a5ab24b28"
"checksum scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "94258f53601af11e6a49f722422f6e3425c52b06245a5cf9bc09908b174f5e27"
"checksum sdl2 0.32.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0ebf85f207d42e4da59fa31fff977be5ff0b224873506c4bd70cc1c94b331593"
"checksum sdl2-sys 0.32.5 (registry+https://github.com/rust-lang/crates.io-index)" = "e82803e85c2e6178d28886cef25b2c53afc2eecaeff739f2247f23ed3352e6c1"
"checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
"checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
"checksum serde 1.0.89 (registry+https://github.com/rust-lang/crates.io-index)" = "92514fb95f900c9b5126e32d020f5c6d40564c27a5ea6d1d7d9f157a96623560"

1
Cargo.toml
View file

@ -61,6 +61,7 @@ portaudio-backend = ["librespot-playback/portaudio-backend"]
pulseaudio-backend = ["librespot-playback/pulseaudio-backend"]
jackaudio-backend = ["librespot-playback/jackaudio-backend"]
rodio-backend = ["librespot-playback/rodio-backend"]
sdl-backend = ["librespot-playback/sdl-backend"]
with-tremor = ["librespot-audio/with-tremor"]
with-vorbis = ["librespot-audio/with-vorbis"]

2
playback/Cargo.toml
View file

@ -22,6 +22,7 @@ jack = { version = "0.5.3", optional = true }
libc = { version = "0.2", optional = true }
rodio = { git = "https://github.com/tomaka/rodio", optional = true, default-features = false }
cpal = { version = "*", optional = true }
sdl2 = { version = "0.32", optional = true }
[features]
alsa-backend = ["alsa"]
@ -29,3 +30,4 @@ portaudio-backend = ["portaudio-rs"]
pulseaudio-backend = ["libpulse-sys", "libc"]
jackaudio-backend = ["jack"]
rodio-backend = ["rodio", "cpal"]
sdl-backend = ["sdl2"]

6
playback/src/audio_backend/mod.rs
View file

@ -38,6 +38,10 @@ use self::jackaudio::JackSink;
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;
@ -53,6 +57,8 @@ pub const BACKENDS: &'static [(&'static str, fn(Option<String>) -> Box<Sink>)] =
("jackaudio", mk_sink::<JackSink>),
#[cfg(feature = "rodio-backend")]
("rodio", mk_sink::<RodioSink>),
#[cfg(feature = "sdl-backend")]
("sdl", mk_sink::<SdlSink>),
("pipe", mk_sink::<StdoutSink>),
];

56
playback/src/audio_backend/sdl.rs Normal file
View file

@ -0,0 +1,56 @@
use super::{Open, Sink};
use sdl2::audio::{AudioQueue, AudioSpecDesired};
use std::{io, thread, time};
type Channel = i16;
pub struct SdlSink {
queue: AudioQueue<Channel>,
}
impl Open for SdlSink {
fn open(device: Option<String>) -> SdlSink {
debug!("Using SDL sink");
if device.is_some() {
panic!("SDL sink does not support specifying a device name");
}
let ctx = sdl2::init().expect("Could not init SDL");
let audio = ctx.audio().expect("Could not init SDL audio subsystem");
let desired_spec = AudioSpecDesired {
freq: Some(44_100),
channels: Some(2),
samples: None,
};
let queue = audio
.open_queue(None, &desired_spec)
.expect("Could not open SDL audio device");
SdlSink { queue: queue }
}
}
impl Sink for SdlSink {
fn start(&mut self) -> io::Result<()> {
self.queue.clear();
self.queue.resume();
Ok(())
}
fn stop(&mut self) -> io::Result<()> {
self.queue.pause();
self.queue.clear();
Ok(())
}
fn write(&mut self, data: &[i16]) -> io::Result<()> {
while self.queue.size() > (2 * 2 * 44_100) {
// sleep and wait for sdl thread to drain the queue a bit
thread::sleep(time::Duration::from_millis(10));
}
self.queue.queue(data);
Ok(())
}
}

3
playback/src/lib.rs
View file

@ -16,6 +16,9 @@ extern crate libpulse_sys;
#[cfg(feature = "jackaudio-backend")]
extern crate jack;
#[cfg(feature = "sdl-backend")]
extern crate sdl2;
#[cfg(feature = "libc")]
extern crate libc;