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// Copyright The pipewire-rs Contributors.
// SPDX-License-Identifier: MIT
//! This file is a rustic interpretation of the the [PipeWire Tutorial 5][tut]
//!
//! tut: https://docs.pipewire.org/page_tutorial5.html
use pipewire as pw;
use pw::{properties::properties, spa};
use clap::Parser;
use spa::pod::Pod;
struct UserData {
format: spa::param::video::VideoInfoRaw,
}
#[derive(Parser)]
#[clap(name = "streams", about = "Stream example")]
struct Opt {
#[clap(short, long, help = "The target object id to connect to")]
target: Option<u32>,
}
pub fn main() -> Result<(), pw::Error> {
pw::init();
let opt = Opt::parse();
let mainloop = pw::main_loop::MainLoopRc::new(None)?;
let context = pw::context::ContextRc::new(&mainloop, None)?;
let core = context.connect_rc(None)?;
let data = UserData {
format: Default::default(),
};
let stream = pw::stream::StreamBox::new(
&core,
"video-test",
properties! {
*pw::keys::MEDIA_TYPE => "Video",
*pw::keys::MEDIA_CATEGORY => "Capture",
*pw::keys::MEDIA_ROLE => "Camera",
},
)?;
/*let stream = pw::stream::Stream::<UserData>::with_user_data(
&mainloop,
"video-test",
,
data,
)*/
let _listener = stream
.add_local_listener_with_user_data(data)
.state_changed(|_, _, old, new| {
println!("State changed: {:?} -> {:?}", old, new);
})
.param_changed(|_, user_data, id, param| {
let Some(param) = param else {
return;
};
if id != pw::spa::param::ParamType::Format.as_raw() {
return;
}
let (media_type, media_subtype) =
match pw::spa::param::format_utils::parse_format(param) {
Ok(v) => v,
Err(_) => return,
};
if media_type != pw::spa::param::format::MediaType::Video
|| media_subtype != pw::spa::param::format::MediaSubtype::Raw
{
return;
}
user_data
.format
.parse(param)
.expect("Failed to parse param changed to VideoInfoRaw");
println!("got video format:");
println!(
" format: {} ({:?})",
user_data.format.format().as_raw(),
user_data.format.format()
);
println!(
" size: {}x{}",
user_data.format.size().width,
user_data.format.size().height
);
println!(
" framerate: {}/{}",
user_data.format.framerate().num,
user_data.format.framerate().denom
);
// prepare to render video of this size
})
.process(|stream, _| {
match stream.dequeue_buffer() {
None => println!("out of buffers"),
Some(mut buffer) => {
let datas = buffer.datas_mut();
if datas.is_empty() {
return;
}
// copy frame data to screen
let data = &mut datas[0];
println!("got a frame of size {}", data.chunk().size());
}
}
})
.register()?;
println!("Created stream {:#?}", stream);
let obj = pw::spa::pod::object!(
pw::spa::utils::SpaTypes::ObjectParamFormat,
pw::spa::param::ParamType::EnumFormat,
pw::spa::pod::property!(
pw::spa::param::format::FormatProperties::MediaType,
Id,
pw::spa::param::format::MediaType::Video
),
pw::spa::pod::property!(
pw::spa::param::format::FormatProperties::MediaSubtype,
Id,
pw::spa::param::format::MediaSubtype::Raw
),
pw::spa::pod::property!(
pw::spa::param::format::FormatProperties::VideoFormat,
Choice,
Enum,
Id,
pw::spa::param::video::VideoFormat::RGB,
pw::spa::param::video::VideoFormat::RGB,
pw::spa::param::video::VideoFormat::RGBA,
pw::spa::param::video::VideoFormat::RGBx,
pw::spa::param::video::VideoFormat::BGRx,
pw::spa::param::video::VideoFormat::YUY2,
pw::spa::param::video::VideoFormat::I420,
),
pw::spa::pod::property!(
pw::spa::param::format::FormatProperties::VideoSize,
Choice,
Range,
Rectangle,
pw::spa::utils::Rectangle {
width: 320,
height: 240
},
pw::spa::utils::Rectangle {
width: 1,
height: 1
},
pw::spa::utils::Rectangle {
width: 4096,
height: 4096
}
),
pw::spa::pod::property!(
pw::spa::param::format::FormatProperties::VideoFramerate,
Choice,
Range,
Fraction,
pw::spa::utils::Fraction { num: 25, denom: 1 },
pw::spa::utils::Fraction { num: 0, denom: 1 },
pw::spa::utils::Fraction {
num: 1000,
denom: 1
}
),
);
let values: Vec<u8> = pw::spa::pod::serialize::PodSerializer::serialize(
std::io::Cursor::new(Vec::new()),
&pw::spa::pod::Value::Object(obj),
)
.unwrap()
.0
.into_inner();
let mut params = [Pod::from_bytes(&values).unwrap()];
stream.connect(
spa::utils::Direction::Input,
opt.target,
pw::stream::StreamFlags::AUTOCONNECT | pw::stream::StreamFlags::MAP_BUFFERS,
&mut params,
)?;
println!("Connected stream");
mainloop.run();
Ok(())
}
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