115 lines
3.7 KiB
Rust
115 lines
3.7 KiB
Rust
use crate::{Error, Result, ResultExt};
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use gst::{
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Bus, Gst, MessageType, MessageView, Sink, Source,
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app::AppSink,
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caps::{Caps, CapsType},
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element::ElementExt,
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pipeline::PipelineExt,
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playback::Playbin3,
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videoconvertscale::VideoConvert,
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};
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use std::sync::{Arc, Mutex, atomic::AtomicBool};
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#[derive(Debug, Clone)]
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pub struct VideoSource {
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pub(crate) playbin: Playbin3,
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// pub(crate) videoconvert: VideoConvert,
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pub(crate) appsink: AppSink,
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pub(crate) bus: Bus,
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pub(crate) ready: Arc<AtomicBool>,
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pub(crate) frame: Arc<Mutex<gst::app::Sample>>,
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}
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impl VideoSource {
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/// Creates a new video source from the given URL.
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/// Since this doesn't have to parse the pipeline manually, we aren't sanitizing the URL for
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/// now.
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pub fn new(url: impl AsRef<str>) -> Result<Self> {
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Gst::new();
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// let videoconvert = VideoConvert::new("iced-video-convert")
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// // .change_context(Error)?
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// // .with_output_format(gst::plugins::videoconvertscale::VideoFormat::Rgba)
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// .change_context(Error)?;
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let appsink = AppSink::new("iced-video-sink")
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.change_context(Error)?
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.with_drop(true);
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// .with_caps(
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// Caps::builder(CapsType::Video)
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// .field("format", "RGBA")
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// .build(),
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// );
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// let video_sink = videoconvert.link(&appsink).change_context(Error)?;
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let playbin = gst::plugins::playback::Playbin3::new("iced-video")
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.change_context(Error)?
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.with_uri(url.as_ref())
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.with_buffer_duration(core::time::Duration::from_secs(2))
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.with_buffer_size(2000000)
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.with_video_sink(&appsink);
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let bus = playbin.bus().change_context(Error)?;
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playbin.pause().change_context(Error)?;
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let ready = Arc::new(AtomicBool::new(false));
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let frame = Arc::new(Mutex::new(gst::app::Sample::new()));
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let appsink = appsink.on_new_frame({
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let ready = Arc::clone(&ready);
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let frame = Arc::clone(&frame);
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move |appsink| {
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let Ok(sample) = appsink.pull_sample() else {
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tracing::error!("Failed to pull video sample from appsink despite being notified of new frame");
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return Ok(());
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};
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{
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let mut guard = frame.lock().expect("BUG: Mutex poisoned");
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core::mem::replace(&mut *guard, sample);
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ready.store(true, std::sync::atomic::Ordering::Relaxed);
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}
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Ok(())
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}
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});
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Ok(Self {
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playbin,
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// videoconvert,
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appsink,
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bus,
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ready,
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frame,
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})
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}
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pub async fn wait(self) -> Result<()> {
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self.playbin
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.wait_for_states(&[gst::State::Paused, gst::State::Playing])
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.await
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.change_context(Error)
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.attach("Failed to wait for video initialisation")
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}
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pub fn play(&self) -> Result<()> {
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self.playbin
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.play()
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.change_context(Error)
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.attach("Failed to play video")
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}
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pub fn pause(&self) -> Result<()> {
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self.playbin
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.pause()
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.change_context(Error)
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.attach("Failed to pause video")
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}
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pub fn size(&self) -> Result<(i32, i32)> {
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let caps = self
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.appsink
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.sink("sink")
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.current_caps()
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.change_context(Error)?;
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caps.width()
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.and_then(|width| caps.height().map(|height| (width, height)))
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.ok_or(Error)
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.attach("Failed to get width, height")
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}
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}
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