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streamproducer: extract process_sample function
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/-/merge_requests/1280>
This commit is contained in:
Mathieu Duponchelle
parent
214f61abc5
commit
a4247d5199
1 changed files with 108 additions and 86 deletions
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@ -217,6 +217,113 @@ impl StreamProducer {
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Ok(())
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}
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fn process_sample(
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sample: gst::Sample,
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appsink: &gst_app::AppSink,
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consumers: &mut StreamConsumers,
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) -> Result<gst::FlowSuccess, gst::FlowError> {
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let (is_discont, is_keyframe) = if let Some(buf) = sample.buffer() {
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let flags = buf.flags();
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(
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flags.contains(gst::BufferFlags::DISCONT),
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!flags.contains(gst::BufferFlags::DELTA_UNIT),
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)
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} else {
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(false, true)
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};
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gst::trace!(
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CAT,
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obj: appsink,
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"processing preroll {:?}",
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sample.buffer()
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);
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let latency = consumers.current_latency;
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let latency_updated = mem::replace(&mut consumers.latency_updated, false);
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let mut needs_keyframe_request = false;
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let current_consumers = consumers
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.consumers
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.values()
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.filter_map(|consumer| {
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if let Some(latency) = latency {
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if consumer
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.forwarded_latency
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.compare_exchange(
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false,
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true,
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atomic::Ordering::SeqCst,
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atomic::Ordering::SeqCst,
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)
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.is_ok()
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|| latency_updated
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{
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consumer.appsrc.set_latency(latency, gst::ClockTime::NONE);
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}
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}
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if consumer.discard.load(atomic::Ordering::SeqCst) {
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consumer
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.needs_keyframe
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.store(false, atomic::Ordering::SeqCst);
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return None;
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}
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if is_discont && !is_keyframe {
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// Whenever we have a discontinuity, we need a new keyframe
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consumer
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.needs_keyframe
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.store(true, atomic::Ordering::SeqCst);
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}
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if !is_keyframe && consumer.needs_keyframe.load(atomic::Ordering::SeqCst) {
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// If we need a keyframe (and this one isn't) request a keyframe upstream
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if !needs_keyframe_request {
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gst::debug!(CAT, obj: appsink, "Requesting keyframe for first buffer");
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needs_keyframe_request = true;
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}
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consumer.dropped.fetch_add(1, atomic::Ordering::SeqCst);
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gst::debug!(
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CAT,
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obj: appsink,
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"Ignoring frame for {} while waiting for a keyframe",
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consumer.appsrc.name()
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);
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None
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} else {
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consumer
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.needs_keyframe
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.store(false, atomic::Ordering::SeqCst);
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consumer.pushed.fetch_add(1, atomic::Ordering::SeqCst);
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Some(consumer.appsrc.clone())
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}
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})
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.collect::<Vec<_>>();
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drop(consumers);
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if needs_keyframe_request {
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appsink.send_event(
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gst_video::UpstreamForceKeyUnitEvent::builder()
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.all_headers(true)
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.build(),
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);
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}
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for consumer in current_consumers {
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if let Err(err) = consumer.push_sample(&sample) {
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gst::warning!(CAT, obj: appsink, "Failed to push sample: {}", err);
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}
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}
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Ok(gst::FlowSuccess::Ok)
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}
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/// Remove a consumer appsrc by id
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pub fn remove_consumer(&self, consumer: &gst_app::AppSrc) {
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let name = consumer.name();
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@ -290,92 +397,7 @@ impl<'a> From<&'a gst_app::AppSink> for StreamProducer {
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}
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};
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let (is_discont, is_keyframe) = if let Some(buf) = sample.buffer() {
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let flags = buf.flags();
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(flags.contains(gst::BufferFlags::DISCONT),
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!flags.contains(gst::BufferFlags::DELTA_UNIT))
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} else {
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(false, true)
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};
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gst::trace!(CAT, obj: appsink, "processing sample");
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let latency = consumers.current_latency;
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let latency_updated = mem::replace(&mut consumers.latency_updated, false);
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let mut needs_keyframe_request = false;
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let current_consumers = consumers
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.consumers
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.values()
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.filter_map(|consumer| {
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if let Some(latency) = latency {
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if consumer.forwarded_latency
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.compare_exchange(
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false,
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true,
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atomic::Ordering::SeqCst,
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atomic::Ordering::SeqCst,
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)
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.is_ok()
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|| latency_updated
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{
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consumer.appsrc.set_latency(latency, gst::ClockTime::NONE);
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}
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}
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if consumer.discard.load(atomic::Ordering::SeqCst) {
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consumer.needs_keyframe.store(false, atomic::Ordering::SeqCst);
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return None;
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}
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if is_discont && !is_keyframe {
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// Whenever we have a discontinuity, we need a new keyframe
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consumer.needs_keyframe.store(
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true,
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atomic::Ordering::SeqCst,
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);
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}
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if !is_keyframe && consumer.needs_keyframe.load(atomic::Ordering::SeqCst)
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{
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// If we need a keyframe (and this one isn't) request a keyframe upstream
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if !needs_keyframe_request {
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gst::debug!(CAT, obj: appsink, "Requesting keyframe for first buffer");
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needs_keyframe_request = true;
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}
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consumer.dropped.fetch_add(1, atomic::Ordering::SeqCst);
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gst::debug!(CAT, obj: appsink, "Ignoring frame for {} while waiting for a keyframe",
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consumer.appsrc.name());
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None
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} else {
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consumer.needs_keyframe.store(false, atomic::Ordering::SeqCst);
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consumer.pushed.fetch_add(1, atomic::Ordering::SeqCst);
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Some(consumer.appsrc.clone())
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}
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})
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.collect::<Vec<_>>();
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drop(consumers);
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if needs_keyframe_request {
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appsink.send_event(
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gst_video::UpstreamForceKeyUnitEvent::builder()
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.all_headers(true)
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.build(),
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);
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}
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for consumer in current_consumers {
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if let Err(err) = consumer.push_sample(&sample) {
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gst::warning!(CAT, obj: appsink, "Failed to push sample: {}", err);
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}
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}
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Ok(gst::FlowSuccess::Ok)
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StreamProducer::process_sample(sample, appsink, &mut consumers)
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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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