fix: Add handling for missing VideoFormat on Linux

[meocoder31099]

In the current code, VideoFormat::RGBA is included in the list of output formats for the buffer

scap/src/capturer/engine/linux/mod.rs

Lines 213 to 222 in 92cabc5

	pw::spa::pod::property!(
	FormatProperties::VideoFormat,
	Choice,
	Enum,
	Id,
	pw::spa::param::video::VideoFormat::RGB,
	pw::spa::param::video::VideoFormat::RGBA,
	pw::spa::param::video::VideoFormat::RGBx,
	pw::spa::param::video::VideoFormat::BGRx,
	),

but the case where VideoFormat is VideoFormat::RGBA is not handled

scap/src/capturer/engine/linux/mod.rs

Lines 136 to 164 in 92cabc5

	if let Err(e) = match user_data.format.format() {
	VideoFormat::RGBx => user_data.tx.send(Frame::RGBx(RGBxFrame {
	display_time: timestamp as u64,
	width: frame_size.width as i32,
	height: frame_size.height as i32,
	data: frame_data,
	})),
	VideoFormat::RGB => user_data.tx.send(Frame::RGB(RGBFrame {
	display_time: timestamp as u64,
	width: frame_size.width as i32,
	height: frame_size.height as i32,
	data: frame_data,
	})),
	VideoFormat::xBGR => user_data.tx.send(Frame::XBGR(XBGRFrame {
	display_time: timestamp as u64,
	width: frame_size.width as i32,
	height: frame_size.height as i32,
	data: frame_data,
	})),
	VideoFormat::BGRx => user_data.tx.send(Frame::BGRx(BGRxFrame {
	display_time: timestamp as u64,
	width: frame_size.width as i32,
	height: frame_size.height as i32,
	data: frame_data,
	})),
	_ => panic!("Unsupported frame format received"),
	} {
	eprintln!("{e}");
	}

This PR will fix it.

Summary by CodeRabbit

• New Features
  • Added support for processing and transmitting video frames in the RGBA format on Linux systems.