forked from mirrors/gstreamer-rs
streamproducer: expose set_forward_preroll() API
This is useful to decide whether the preroll sample should be forwarded to consumers when prerolling or only once it is time to render it. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/-/merge_requests/1439>
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1 changed files with 14 additions and 2 deletions
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@ -364,6 +364,11 @@ impl StreamProducer {
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self.consumers.lock().unwrap().events_to_forward = events_to_forward.into_iter().collect();
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}
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/// configure whether the preroll sample should be forwarded (default: `true`)
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pub fn set_forward_preroll(&self, forward_preroll: bool) {
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self.consumers.lock().unwrap().forward_preroll = forward_preroll;
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}
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/// Get the GStreamer `appsink` wrapped by this producer
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pub fn appsink(&self) -> &gst_app::AppSink {
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&self.appsink
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@ -399,6 +404,7 @@ impl<'a> From<&'a gst_app::AppSink> for StreamProducer {
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// it would make sense to automatically forward more events such as Tag but that would break
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// with older GStreamer, see https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4297
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events_to_forward: vec![gst::EventType::Eos],
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forward_preroll: true,
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just_forwarded_preroll: false,
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}));
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@ -434,9 +440,13 @@ impl<'a> From<&'a gst_app::AppSink> for StreamProducer {
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}
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};
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consumers.just_forwarded_preroll = true;
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if consumers.forward_preroll {
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consumers.just_forwarded_preroll = true;
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StreamProducer::process_sample(sample, appsink, consumers)
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StreamProducer::process_sample(sample, appsink, consumers)
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} else {
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Ok(gst::FlowSuccess::Ok)
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}
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}))
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.new_event(glib::clone!(@strong consumers => move |appsink| {
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match appsink.pull_object().map(|obj| obj.downcast::<gst::Event>()) {
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@ -525,6 +535,8 @@ struct StreamConsumers {
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consumers: HashMap<gst_app::AppSrc, StreamConsumer>,
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/// What events should be forwarded to consumers
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events_to_forward: Vec<gst::EventType>,
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/// Whether the preroll sample should be forwarded at all
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forward_preroll: bool,
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/// Whether we just forwarded the preroll sample. When we did we want to
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/// discard the next sample from on_new_sample as it would cause us to
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/// otherwise push out the same sample twice to consumers.
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