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gstreamer: element: more generic (un)link_many() API

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No longer enforces to pass an array of references.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/-/merge_requests/1230>
This commit is contained in:
Guillaume Desmottes 2023-03-09 11:42:44 +01:00 committed by GStreamer Marge Bot
parent c4a968a403
commit 01d3cef73e
16 changed files with 35 additions and 32 deletions
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2
examples/src/bin/appsrc.rs
View file

@ -50,7 +50,7 @@ fn create_pipeline() -> Result<gst::Pipeline, Error> {
let sink = gst::ElementFactory::make("autovideosink").build()?; let sink = gst::ElementFactory::make("autovideosink").build()?;
pipeline.add_many([appsrc.upcast_ref(), &videoconvert, &sink])?; pipeline.add_many([appsrc.upcast_ref(), &videoconvert, &sink])?;
gst::Element::link_many(&[appsrc.upcast_ref(), &videoconvert, &sink])?; gst::Element::link_many([appsrc.upcast_ref(), &videoconvert, &sink])?;
// Our frame counter, that is stored in the mutable environment // Our frame counter, that is stored in the mutable environment
// of the closure of the need-data callback // of the closure of the need-data callback

2
examples/src/bin/decodebin.rs
View file

@ -71,7 +71,7 @@ fn example_main() -> Result<(), Error> {
let decodebin = gst::ElementFactory::make("decodebin").build()?; let decodebin = gst::ElementFactory::make("decodebin").build()?;
pipeline.add_many([&src, &decodebin])?; pipeline.add_many([&src, &decodebin])?;
gst::Element::link_many(&[&src, &decodebin])?; gst::Element::link_many([&src, &decodebin])?;
// Need to move a new reference into the closure. // Need to move a new reference into the closure.
// !!ATTENTION!!: // !!ATTENTION!!:

2
examples/src/bin/encodebin.rs
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@ -103,7 +103,7 @@ fn example_main() -> Result<(), Error> {
// directly link it to our filesink without problems. // directly link it to our filesink without problems.
// The caps of encodebin's src-pad are set after we configured the encoding-profile. // The caps of encodebin's src-pad are set after we configured the encoding-profile.
// (But filesink doesn't really care about the caps at its input anyway) // (But filesink doesn't really care about the caps at its input anyway)
gst::Element::link_many(&[&encodebin, &sink])?; gst::Element::link_many([&encodebin, &sink])?;
// Need to move a new reference into the closure. // Need to move a new reference into the closure.
// !!ATTENTION!!: // !!ATTENTION!!:

4
examples/src/bin/fd_allocator.rs
View file

@ -46,7 +46,7 @@ fn create_receiver_pipeline(
let sink = gst::ElementFactory::make("autovideosink").build()?; let sink = gst::ElementFactory::make("autovideosink").build()?;
pipeline.add_many([src.upcast_ref(), &filter, &convert, &queue, &sink])?; pipeline.add_many([src.upcast_ref(), &filter, &convert, &queue, &sink])?;
gst::Element::link_many(&[src.upcast_ref(), &filter, &convert, &queue, &sink])?; gst::Element::link_many([src.upcast_ref(), &filter, &convert, &queue, &sink])?;
let fd_allocator = gst_allocators::FdAllocator::new(); let fd_allocator = gst_allocators::FdAllocator::new();
let video_info = video_info.clone(); let video_info = video_info.clone();
@ -116,7 +116,7 @@ fn create_sender_pipeline(
.set_caps(Some(&caps)); .set_caps(Some(&caps));
pipeline.add_many([&src, &sink])?; pipeline.add_many([&src, &sink])?;
gst::Element::link_many(&[&src, &sink])?; gst::Element::link_many([&src, &sink])?;
let appsink = sink let appsink = sink
.downcast::<gst_app::AppSink>() .downcast::<gst_app::AppSink>()

2
examples/src/bin/overlay-composition.rs
View file

@ -78,7 +78,7 @@ fn create_pipeline() -> Result<gst::Pipeline, Error> {
let sink = gst::ElementFactory::make("autovideosink").build()?; let sink = gst::ElementFactory::make("autovideosink").build()?;
pipeline.add_many([&src, &overlay, &capsfilter, &videoconvert, &sink])?; pipeline.add_many([&src, &overlay, &capsfilter, &videoconvert, &sink])?;
gst::Element::link_many(&[&src, &overlay, &capsfilter, &videoconvert, &sink])?; gst::Element::link_many([&src, &overlay, &capsfilter, &videoconvert, &sink])?;
// The PangoFontMap represents the set of fonts available for a particular rendering system. // The PangoFontMap represents the set of fonts available for a particular rendering system.
let fontmap = pangocairo::FontMap::new(); let fontmap = pangocairo::FontMap::new();

2
examples/src/bin/pango-cairo.rs
View file

@ -77,7 +77,7 @@ fn create_pipeline() -> Result<gst::Pipeline, Error> {
let sink = gst::ElementFactory::make("autovideosink").build()?; let sink = gst::ElementFactory::make("autovideosink").build()?;
pipeline.add_many([&src, &overlay, &capsfilter, &videoconvert, &sink])?; pipeline.add_many([&src, &overlay, &capsfilter, &videoconvert, &sink])?;
gst::Element::link_many(&[&src, &overlay, &capsfilter, &videoconvert, &sink])?; gst::Element::link_many([&src, &overlay, &capsfilter, &videoconvert, &sink])?;
// The PangoFontMap represents the set of fonts available for a particular rendering system. // The PangoFontMap represents the set of fonts available for a particular rendering system.
let fontmap = pangocairo::FontMap::new(); let fontmap = pangocairo::FontMap::new();

4
examples/src/bin/rtpfecclient.rs
View file

@ -115,7 +115,7 @@ fn example_main() -> Result<(), Error> {
.build()?; .build()?;
pipeline.add_many([&src, &netsim, &rtpbin, &depay, &dec, &conv, &scale, &filter])?; pipeline.add_many([&src, &netsim, &rtpbin, &depay, &dec, &conv, &scale, &filter])?;
gst::Element::link_many(&[&depay, &dec, &conv, &scale, &filter])?; gst::Element::link_many([&depay, &dec, &conv, &scale, &filter])?;
match args[1].as_str() { match args[1].as_str() {
"play" => { "play" => {
@ -133,7 +133,7 @@ fn example_main() -> Result<(), Error> {
.build()?; .build()?;
pipeline.add_many([&enc, &mux, &sink])?; pipeline.add_many([&enc, &mux, &sink])?;
gst::Element::link_many(&[&filter, &enc, &mux, &sink])?; gst::Element::link_many([&filter, &enc, &mux, &sink])?;
eprintln!("Recording to out.mkv"); eprintln!("Recording to out.mkv");
} }
_ => return Err(Error::from(UsageError(args[0].clone()))), _ => return Err(Error::from(UsageError(args[0].clone()))),

2
examples/src/bin/rtsp-server-subclass.rs
View file

@ -138,7 +138,7 @@ mod media_factory {
.unwrap(); .unwrap();
bin.add_many([&src, &enc, &pay]).unwrap(); bin.add_many([&src, &enc, &pay]).unwrap();
gst::Element::link_many(&[&src, &enc, &pay]).unwrap(); gst::Element::link_many([&src, &enc, &pay]).unwrap();
Some(bin.upcast()) Some(bin.upcast())
} }

2
examples/src/bin/toc.rs
View file

@ -35,7 +35,7 @@ fn example_main() {
let decodebin = gst::ElementFactory::make("decodebin").build().unwrap(); let decodebin = gst::ElementFactory::make("decodebin").build().unwrap();
pipeline.add_many([&src, &decodebin]).unwrap(); pipeline.add_many([&src, &decodebin]).unwrap();
gst::Element::link_many(&[&src, &decodebin]).unwrap(); gst::Element::link_many([&src, &decodebin]).unwrap();
// Need to move a new reference into the closure. // Need to move a new reference into the closure.
// !!ATTENTION!!: // !!ATTENTION!!:

1
gstreamer/Cargo.toml
View file

@ -33,6 +33,7 @@ paste = "1.0"
pretty-hex = "0.3" pretty-hex = "0.3"
thiserror = "1" thiserror = "1"
smallvec = { version = "1.0", features = ["write"] } smallvec = { version = "1.0", features = ["write"] }
itertools = "0.10"
[dev-dependencies] [dev-dependencies]
ron = "0.8" ron = "0.8"

23
gstreamer/src/element.rs
View file

@ -3,6 +3,7 @@
use std::{ffi::CStr, future::Future, mem, num::NonZeroU64, pin::Pin}; use std::{ffi::CStr, future::Future, mem, num::NonZeroU64, pin::Pin};
use glib::translate::*; use glib::translate::*;
use itertools::Itertools;
use crate::{ use crate::{
format::{ format::{
@ -16,18 +17,20 @@ use crate::{
impl Element { impl Element {
#[doc(alias = "gst_element_link_many")] #[doc(alias = "gst_element_link_many")]
pub fn link_many<E: IsA<Element>>(elements: &[&E]) -> Result<(), glib::BoolError> { pub fn link_many(
elements: impl IntoIterator<Item = impl AsRef<Element> + Clone>,
) -> Result<(), glib::BoolError> {
skip_assert_initialized!(); skip_assert_initialized!();
for e in elements.windows(2) { for (src, dest) in elements.into_iter().tuple_windows() {
unsafe { unsafe {
glib::result_from_gboolean!( glib::result_from_gboolean!(
ffi::gst_element_link( ffi::gst_element_link(
e[0].as_ref().to_glib_none().0, src.as_ref().to_glib_none().0,
e[1].as_ref().to_glib_none().0, dest.as_ref().to_glib_none().0,
), ),
"Failed to link elements '{}' and '{}'", "Failed to link elements '{}' and '{}'",
e[0].as_ref().name(), src.as_ref().name(),
e[1].as_ref().name(), dest.as_ref().name(),
)?; )?;
} }
} }
@ -36,13 +39,13 @@ impl Element {
} }
#[doc(alias = "gst_element_unlink_many")] #[doc(alias = "gst_element_unlink_many")]
pub fn unlink_many<E: IsA<Element>>(elements: &[&E]) { pub fn unlink_many(elements: impl IntoIterator<Item = impl AsRef<Element> + Clone>) {
skip_assert_initialized!(); skip_assert_initialized!();
for e in elements.windows(2) { for (src, dest) in elements.into_iter().tuple_windows() {
unsafe { unsafe {
ffi::gst_element_unlink( ffi::gst_element_unlink(
e[0].as_ref().to_glib_none().0, src.as_ref().to_glib_none().0,
e[1].as_ref().to_glib_none().0, dest.as_ref().to_glib_none().0,
); );
} }
} }

2
gstreamer/src/subclass/element.rs
View file

@ -735,7 +735,7 @@ mod tests {
pipeline pipeline
.add_many([&src, element.upcast_ref(), &sink]) .add_many([&src, element.upcast_ref(), &sink])
.unwrap(); .unwrap();
Element::link_many(&[&src, element.upcast_ref(), &sink]).unwrap(); Element::link_many([&src, element.upcast_ref(), &sink]).unwrap();
pipeline.set_state(crate::State::Playing).unwrap(); pipeline.set_state(crate::State::Playing).unwrap();
let bus = pipeline.bus().unwrap(); let bus = pipeline.bus().unwrap();

2
tutorials/src/bin/basic-tutorial-3.rs
View file

@ -37,7 +37,7 @@ fn tutorial_main() {
pipeline pipeline
.add_many([&source, &convert, &resample, &sink]) .add_many([&source, &convert, &resample, &sink])
.unwrap(); .unwrap();
gst::Element::link_many(&[&convert, &resample, &sink]).expect("Elements could not be linked."); gst::Element::link_many([&convert, &resample, &sink]).expect("Elements could not be linked.");
// Connect the pad-added signal // Connect the pad-added signal
source.connect_pad_added(move |src, src_pad| { source.connect_pad_added(move |src, src_pad| {

6
tutorials/src/bin/basic-tutorial-7.rs
View file

@ -71,9 +71,9 @@ fn tutorial_main() {
]) ])
.unwrap(); .unwrap();
gst::Element::link_many(&[&audio_source, &tee]).unwrap(); gst::Element::link_many([&audio_source, &tee]).unwrap();
gst::Element::link_many(&[&audio_queue, &audio_convert, &audio_resample, &audio_sink]).unwrap(); gst::Element::link_many([&audio_queue, &audio_convert, &audio_resample, &audio_sink]).unwrap();
gst::Element::link_many(&[&video_queue, &visual, &video_convert, &video_sink]).unwrap(); gst::Element::link_many([&video_queue, &visual, &video_convert, &video_sink]).unwrap();
let tee_audio_pad = tee.request_pad_simple("src_%u").unwrap(); let tee_audio_pad = tee.request_pad_simple("src_%u").unwrap();
println!( println!(

9
tutorials/src/bin/basic-tutorial-8.rs
View file

@ -127,10 +127,9 @@ fn main() {
]) ])
.unwrap(); .unwrap();
gst::Element::link_many(&[appsrc.upcast_ref(), &tee]).unwrap(); gst::Element::link_many([appsrc.upcast_ref(), &tee]).unwrap();
gst::Element::link_many(&[&audio_queue, &audio_convert1, &audio_resample, &audio_sink]) gst::Element::link_many([&audio_queue, &audio_convert1, &audio_resample, &audio_sink]).unwrap();
.unwrap(); gst::Element::link_many([
gst::Element::link_many(&[
&video_queue, &video_queue,
&audio_convert2, &audio_convert2,
&visual, &visual,
@ -138,7 +137,7 @@ fn main() {
&video_sink, &video_sink,
]) ])
.unwrap(); .unwrap();
gst::Element::link_many(&[&app_queue, appsink.upcast_ref()]).unwrap(); gst::Element::link_many([&app_queue, appsink.upcast_ref()]).unwrap();
let tee_audio_pad = tee.request_pad_simple("src_%u").unwrap(); let tee_audio_pad = tee.request_pad_simple("src_%u").unwrap();
println!( println!(

2
tutorials/src/bin/playback-tutorial-7.rs
View file

@ -29,7 +29,7 @@ fn tutorial_main() -> Result<(), Error> {
// Create the sink bin, add the elements and link them // Create the sink bin, add the elements and link them
let bin = gst::Bin::builder().name("audio_sink_bin").build(); let bin = gst::Bin::builder().name("audio_sink_bin").build();
bin.add_many([&equalizer, &convert, &sink]).unwrap(); bin.add_many([&equalizer, &convert, &sink]).unwrap();
gst::Element::link_many(&[&equalizer, &convert, &sink]).expect("Failed to link elements."); gst::Element::link_many([&equalizer, &convert, &sink]).expect("Failed to link elements.");
let pad = equalizer let pad = equalizer
.static_pad("sink") .static_pad("sink")