Update for the subclassing glib/gstreamer bindings API changes

audio/audiofx/src/audioecho/imp.rs

@@ -90,7 +90,6 @@ impl ObjectSubclass for AudioEcho {
     const NAME: &'static str = "RsAudioEcho";
     type Type = super::AudioEcho;
     type ParentType = gst_base::BaseTransform;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for AudioEcho {

audio/audiofx/src/audioloudnorm/imp.rs

@@ -1705,7 +1705,6 @@ impl ObjectSubclass for AudioLoudNorm {
     const NAME: &'static str = "RsAudioLoudNorm";
     type Type = super::AudioLoudNorm;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

audio/audiofx/src/audiornnoise/imp.rs

@@ -194,7 +194,6 @@ impl ObjectSubclass for AudioRNNoise {
     const NAME: &'static str = "AudioRNNoise";
     type Type = super::AudioRNNoise;
     type ParentType = gst_base::BaseTransform;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for AudioRNNoise {}

audio/claxon/src/claxondec/imp.rs

@@ -43,7 +43,6 @@ impl ObjectSubclass for ClaxonDec {
     const NAME: &'static str = "ClaxonDec";
     type Type = super::ClaxonDec;
     type ParentType = gst_audio::AudioDecoder;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for ClaxonDec {}

audio/csound/src/filter/imp.rs

@@ -318,7 +318,6 @@ impl ObjectSubclass for CsoundFilter {
     const NAME: &'static str = "CsoundFilter";
     type Type = super::CsoundFilter;
     type ParentType = gst_base::BaseTransform;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn new() -> Self {
         let csound = Csound::new();

audio/lewton/src/lewtondec/imp.rs

@@ -49,7 +49,6 @@ impl ObjectSubclass for LewtonDec {
     const NAME: &'static str = "LewtonDec";
     type Type = super::LewtonDec;
     type ParentType = gst_audio::AudioDecoder;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for LewtonDec {}

generic/file/src/filesink/imp.rs

@@ -112,7 +112,6 @@ impl ObjectSubclass for FileSink {
     type Type = super::FileSink;
     type ParentType = gst_base::BaseSink;
     type Interfaces = (gst::URIHandler,);
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for FileSink {

generic/file/src/filesrc/imp.rs

@@ -126,7 +126,6 @@ impl ObjectSubclass for FileSrc {
     type Type = super::FileSrc;
     type ParentType = gst_base::BaseSrc;
     type Interfaces = (gst::URIHandler,);
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for FileSrc {

generic/sodium/src/decrypter/imp.rs

@@ -549,7 +549,6 @@ impl ObjectSubclass for Decrypter {
     const NAME: &'static str = "RsSodiumDecryptor";
     type Type = super::Decrypter;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

generic/sodium/src/encrypter/imp.rs

@@ -339,7 +339,6 @@ impl ObjectSubclass for Encrypter {
     const NAME: &'static str = "RsSodiumEncrypter";
     type Type = super::Encrypter;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

generic/threadshare/src/appsrc/imp.rs

@@ -508,7 +508,6 @@ impl ObjectSubclass for AppSrc {
     const NAME: &'static str = "RsTsAppSrc";
     type Type = super::AppSrc;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let src_pad_handler = AppSrcPadHandler::default();

generic/threadshare/src/inputselector/imp.rs

@@ -395,7 +395,6 @@ impl ObjectSubclass for InputSelector {
     const NAME: &'static str = "RsTsInputSelector";
     type Type = super::InputSelector;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         Self {

generic/threadshare/src/jitterbuffer/imp.rs

@@ -1339,7 +1339,6 @@ impl ObjectSubclass for JitterBuffer {
     const NAME: &'static str = "RsTsJitterBuffer";
     type Type = super::JitterBuffer;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let sink_pad_handler = SinkHandler::default();

generic/threadshare/src/proxy/imp.rs

@@ -576,7 +576,6 @@ impl ObjectSubclass for ProxySink {
     const NAME: &'static str = "RsTsProxySink";
     type Type = super::ProxySink;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         Self {
@@ -1114,7 +1113,6 @@ impl ObjectSubclass for ProxySrc {
     const NAME: &'static str = "RsTsProxySrc";
     type Type = super::ProxySrc;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         Self {

generic/threadshare/src/queue/imp.rs

@@ -696,7 +696,6 @@ impl ObjectSubclass for Queue {
     const NAME: &'static str = "RsTsQueue";
     type Type = super::Queue;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         Self {

generic/threadshare/src/tcpclientsrc/imp.rs

@@ -549,7 +549,6 @@ impl ObjectSubclass for TcpClientSrc {
     const NAME: &'static str = "RsTsTcpClientSrc";
     type Type = super::TcpClientSrc;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let src_pad_handler = TcpClientSrcPadHandler::default();

generic/threadshare/src/udpsink/imp.rs

@@ -948,7 +948,6 @@ impl ObjectSubclass for UdpSink {
     const NAME: &'static str = "RsTsUdpSink";
     type Type = super::UdpSink;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let settings = Arc::new(StdMutex::new(Settings::default()));

generic/threadshare/src/udpsrc/imp.rs

@@ -690,7 +690,6 @@ impl ObjectSubclass for UdpSrc {
     const NAME: &'static str = "RsTsUdpSrc";
     type Type = super::UdpSrc;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let src_pad_handler = UdpSrcPadHandler::default();

generic/threadshare/tests/pad.rs

@@ -306,7 +306,6 @@ mod imp_src {
         const NAME: &'static str = "TsElementSrcTest";
         type Type = super::ElementSrcTest;
         type ParentType = gst::Element;
-        type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
         fn with_class(klass: &Self::Class) -> Self {
             ElementSrcTest {
@@ -638,7 +637,6 @@ mod imp_sink {
         const NAME: &'static str = "TsElementSinkTest";
         type Type = super::ElementSinkTest;
         type ParentType = gst::Element;
-        type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
         fn with_class(klass: &Self::Class) -> Self {
             ElementSinkTest {

net/reqwest/src/reqwesthttpsrc/imp.rs

@@ -1117,5 +1117,4 @@ impl ObjectSubclass for ReqwestHttpSrc {
     type Type = super::ReqwestHttpSrc;
     type ParentType = gst_base::PushSrc;
     type Interfaces = (gst::URIHandler,);
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }

net/rusoto/src/aws_transcriber/imp.rs

@@ -969,7 +969,6 @@ impl ObjectSubclass for Transcriber {
     const NAME: &'static str = "RsAwsTranscriber";
     type Type = super::Transcriber;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

net/rusoto/src/s3sink/imp.rs

@@ -346,7 +346,6 @@ impl ObjectSubclass for S3Sink {
     const NAME: &'static str = "RusotoS3Sink";
     type Type = super::S3Sink;
     type ParentType = gst_base::BaseSink;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for S3Sink {

net/rusoto/src/s3src/imp.rs

@@ -208,7 +208,6 @@ impl ObjectSubclass for S3Src {
     type Type = super::S3Src;
     type ParentType = gst_base::BaseSrc;
     type Interfaces = (gst::URIHandler,);
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for S3Src {

text/json/src/jsongstenc/imp.rs

@@ -205,7 +205,6 @@ impl ObjectSubclass for JsonGstEnc {
     const NAME: &'static str = "RsJsonGstEnc";
     type Type = super::JsonGstEnc;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

text/json/src/jsongstparse/imp.rs

@@ -867,7 +867,6 @@ impl ObjectSubclass for JsonGstParse {
     const NAME: &'static str = "RsJsonGstParse";
     type Type = super::JsonGstParse;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

text/regex/src/gstregex/imp.rs

@@ -123,7 +123,6 @@ impl ObjectSubclass for RegEx {
     const NAME: &'static str = "RsRegEx";
     type Type = super::RegEx;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

text/wrap/src/gsttextwrap/imp.rs

@@ -426,7 +426,6 @@ impl ObjectSubclass for TextWrap {
     const NAME: &'static str = "RsTextWrap";
     type Type = super::TextWrap;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

tutorial/src/identity/imp.rs

@@ -118,7 +118,6 @@ impl ObjectSubclass for Identity {
     const NAME: &'static str = "RsIdentity";
     type Type = super::Identity;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     // Called when a new instance is to be created. We need to return an instance
     // of our struct here and also get the class struct passed in case it's needed

tutorial/src/progressbin/imp.rs

@@ -48,7 +48,6 @@ impl ObjectSubclass for ProgressBin {
     const NAME: &'static str = "RsProgressBin";
     type Type = super::ProgressBin;
     type ParentType = gst::Bin;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     // Called when a new instance is to be created. We need to return an instance
     // of our struct here and also get the class struct passed in case it's needed

tutorial/src/rgb2gray/imp.rs

@@ -95,7 +95,6 @@ impl ObjectSubclass for Rgb2Gray {
     const NAME: &'static str = "RsRgb2Gray";
     type Type = super::Rgb2Gray;
     type ParentType = gst_base::BaseTransform;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 // Implementation of glib::Object virtual methods

tutorial/src/sinesrc/imp.rs

@@ -158,7 +158,6 @@ impl ObjectSubclass for SineSrc {
     const NAME: &'static str = "RsSineSrc";
     type Type = super::SineSrc;
     type ParentType = gst_base::PushSrc;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 // Implementation of glib::Object virtual methods

tutorial/tutorial-1.md

@@ -173,7 +173,6 @@ impl ObjectSubclass for Rgb2Gray {
     const NAME: &'static str = "RsRgb2Gray";
     type Type = super::Rgb2Gray;
     type ParentType = gst_base::BaseTransform;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 ```
 
@@ -277,7 +276,6 @@ impl ObjectSubclass for Rgb2Gray {
     const NAME: &'static str = "RsRgb2Gray";
     type Type = super::Rgb2Gray;
     type ParentType = gst_base::BaseTransform;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for Rgb2Gray {}

tutorial/tutorial-2.md

@@ -110,7 +110,6 @@ impl ObjectSubclass for SineSrc {
     const NAME: &'static str = "RsSineSrc";
     type Type = super::SineSrc;
     type ParentType = gst_base::PushSrc;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     // Called exactly once when registering the type. Used for
     // setting up metadata for all instances, e.g. the name and

utils/fallbackswitch/src/base/subclass/aggregator.rs

@@ -614,10 +614,7 @@ impl<T: AggregatorImpl> AggregatorImplExt for T {
     }
 }
 
-unsafe impl<T: AggregatorImpl> IsSubclassable<T> for Aggregator
-where
-    <T as ObjectSubclass>::Instance: PanicPoison,
-{
+unsafe impl<T: AggregatorImpl> IsSubclassable<T> for Aggregator {
     fn class_init(klass: &mut glib::Class<Self>) {
         <gst::Element as IsSubclassable<T>>::class_init(klass);
         let klass = klass.as_mut();
@@ -643,19 +640,20 @@ where
             klass.negotiate = Some(aggregator_negotiate::<T>);
         }
     }
+
+    fn instance_init(instance: &mut glib::subclass::InitializingObject<T>) {
+        <gst::Element as IsSubclassable<T>>::instance_init(instance);
+    }
 }
 
 unsafe extern "C" fn aggregator_flush<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
-) -> gst::ffi::GstFlowReturn
-where
-    T::Instance: PanicPoison,
-{
+) -> gst::ffi::GstFlowReturn {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    gst::panic_to_error!(&wrap, &instance.panicked(), gst::FlowReturn::Error, {
+    gst::panic_to_error!(&wrap, &imp.panicked(), gst::FlowReturn::Error, {
         imp.flush(wrap.unsafe_cast_ref()).into()
     })
     .to_glib()
@@ -665,15 +663,12 @@ unsafe extern "C" fn aggregator_clip<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
     aggregator_pad: *mut ffi::GstAggregatorPad,
     buffer: *mut gst::ffi::GstBuffer,
-) -> *mut gst::ffi::GstBuffer
-where
-    T::Instance: PanicPoison,
-{
+) -> *mut gst::ffi::GstBuffer {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    let ret = gst::panic_to_error!(&wrap, &instance.panicked(), None, {
+    let ret = gst::panic_to_error!(&wrap, &imp.panicked(), None, {
         imp.clip(
             wrap.unsafe_cast_ref(),
             &from_glib_borrow(aggregator_pad),
@@ -687,15 +682,12 @@ where
 unsafe extern "C" fn aggregator_finish_buffer<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
     buffer: *mut gst::ffi::GstBuffer,
-) -> gst::ffi::GstFlowReturn
-where
-    T::Instance: PanicPoison,
-{
+) -> gst::ffi::GstFlowReturn {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    gst::panic_to_error!(&wrap, &instance.panicked(), gst::FlowReturn::Error, {
+    gst::panic_to_error!(&wrap, &imp.panicked(), gst::FlowReturn::Error, {
         imp.finish_buffer(wrap.unsafe_cast_ref(), from_glib_full(buffer))
             .into()
     })
@@ -706,15 +698,12 @@ unsafe extern "C" fn aggregator_sink_event<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
     aggregator_pad: *mut ffi::GstAggregatorPad,
     event: *mut gst::ffi::GstEvent,
-) -> glib::ffi::gboolean
-where
-    T::Instance: PanicPoison,
-{
+) -> glib::ffi::gboolean {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    gst::panic_to_error!(wrap, &instance.panicked(), false, {
+    gst::panic_to_error!(wrap, &imp.panicked(), false, {
         imp.sink_event(
             wrap.unsafe_cast_ref(),
             &from_glib_borrow(aggregator_pad),
@@ -728,15 +717,12 @@ unsafe extern "C" fn aggregator_sink_event_pre_queue<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
     aggregator_pad: *mut ffi::GstAggregatorPad,
     event: *mut gst::ffi::GstEvent,
-) -> gst::ffi::GstFlowReturn
-where
-    T::Instance: PanicPoison,
-{
+) -> gst::ffi::GstFlowReturn {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    gst::panic_to_error!(&wrap, &instance.panicked(), gst::FlowReturn::Error, {
+    gst::panic_to_error!(&wrap, &imp.panicked(), gst::FlowReturn::Error, {
         imp.sink_event_pre_queue(
             wrap.unsafe_cast_ref(),
             &from_glib_borrow(aggregator_pad),
@@ -751,15 +737,12 @@ unsafe extern "C" fn aggregator_sink_query<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
     aggregator_pad: *mut ffi::GstAggregatorPad,
     query: *mut gst::ffi::GstQuery,
-) -> glib::ffi::gboolean
-where
-    T::Instance: PanicPoison,
-{
+) -> glib::ffi::gboolean {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    gst::panic_to_error!(&wrap, &instance.panicked(), false, {
+    gst::panic_to_error!(&wrap, &imp.panicked(), false, {
         imp.sink_query(
             wrap.unsafe_cast_ref(),
             &from_glib_borrow(aggregator_pad),
@@ -773,15 +756,12 @@ unsafe extern "C" fn aggregator_sink_query_pre_queue<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
     aggregator_pad: *mut ffi::GstAggregatorPad,
     query: *mut gst::ffi::GstQuery,
-) -> glib::ffi::gboolean
-where
-    T::Instance: PanicPoison,
-{
+) -> glib::ffi::gboolean {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    gst::panic_to_error!(&wrap, &instance.panicked(), false, {
+    gst::panic_to_error!(&wrap, &imp.panicked(), false, {
         imp.sink_query_pre_queue(
             wrap.unsafe_cast_ref(),
             &from_glib_borrow(aggregator_pad),
@@ -794,15 +774,12 @@ where
 unsafe extern "C" fn aggregator_src_event<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
     event: *mut gst::ffi::GstEvent,
-) -> glib::ffi::gboolean
-where
-    T::Instance: PanicPoison,
-{
+) -> glib::ffi::gboolean {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    gst::panic_to_error!(&wrap, &instance.panicked(), false, {
+    gst::panic_to_error!(&wrap, &imp.panicked(), false, {
         imp.src_event(wrap.unsafe_cast_ref(), from_glib_full(event))
     })
     .to_glib()
@@ -811,15 +788,12 @@ where
 unsafe extern "C" fn aggregator_src_query<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
     query: *mut gst::ffi::GstQuery,
-) -> glib::ffi::gboolean
-where
-    T::Instance: PanicPoison,
-{
+) -> glib::ffi::gboolean {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    gst::panic_to_error!(&wrap, &instance.panicked(), false, {
+    gst::panic_to_error!(&wrap, &imp.panicked(), false, {
         imp.src_query(wrap.unsafe_cast_ref(), gst::QueryRef::from_mut_ptr(query))
     })
     .to_glib()
@@ -829,15 +803,12 @@ unsafe extern "C" fn aggregator_src_activate<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
     mode: gst::ffi::GstPadMode,
     active: glib::ffi::gboolean,
-) -> glib::ffi::gboolean
-where
-    T::Instance: PanicPoison,
-{
+) -> glib::ffi::gboolean {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    gst::panic_to_error!(&wrap, &instance.panicked(), false, {
+    gst::panic_to_error!(&wrap, &imp.panicked(), false, {
         match imp.src_activate(wrap.unsafe_cast_ref(), from_glib(mode), from_glib(active)) {
             Ok(()) => true,
             Err(err) => {
@@ -852,15 +823,12 @@ where
 unsafe extern "C" fn aggregator_aggregate<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
     timeout: glib::ffi::gboolean,
-) -> gst::ffi::GstFlowReturn
-where
-    T::Instance: PanicPoison,
-{
+) -> gst::ffi::GstFlowReturn {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    gst::panic_to_error!(&wrap, &instance.panicked(), gst::FlowReturn::Error, {
+    gst::panic_to_error!(&wrap, &imp.panicked(), gst::FlowReturn::Error, {
         imp.aggregate(wrap.unsafe_cast_ref(), from_glib(timeout))
             .into()
     })
@@ -869,15 +837,12 @@ where
 
 unsafe extern "C" fn aggregator_start<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
-) -> glib::ffi::gboolean
-where
-    T::Instance: PanicPoison,
-{
+) -> glib::ffi::gboolean {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    gst::panic_to_error!(&wrap, &instance.panicked(), false, {
+    gst::panic_to_error!(&wrap, &imp.panicked(), false, {
         match imp.start(wrap.unsafe_cast_ref()) {
             Ok(()) => true,
             Err(err) => {
@@ -891,15 +856,12 @@ where
 
 unsafe extern "C" fn aggregator_stop<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
-) -> glib::ffi::gboolean
-where
-    T::Instance: PanicPoison,
-{
+) -> glib::ffi::gboolean {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    gst::panic_to_error!(&wrap, &instance.panicked(), false, {
+    gst::panic_to_error!(&wrap, &imp.panicked(), false, {
         match imp.stop(wrap.unsafe_cast_ref()) {
             Ok(()) => true,
             Err(err) => {
@@ -913,15 +875,12 @@ where
 
 unsafe extern "C" fn aggregator_get_next_time<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
-) -> gst::ffi::GstClockTime
-where
-    T::Instance: PanicPoison,
-{
+) -> gst::ffi::GstClockTime {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    gst::panic_to_error!(&wrap, &instance.panicked(), gst::CLOCK_TIME_NONE, {
+    gst::panic_to_error!(&wrap, &imp.panicked(), gst::CLOCK_TIME_NONE, {
         imp.get_next_time(wrap.unsafe_cast_ref())
     })
     .to_glib()
@@ -932,15 +891,12 @@ unsafe extern "C" fn aggregator_create_new_pad<T: AggregatorImpl>(
     templ: *mut gst::ffi::GstPadTemplate,
     req_name: *const libc::c_char,
     caps: *const gst::ffi::GstCaps,
-) -> *mut ffi::GstAggregatorPad
-where
-    T::Instance: PanicPoison,
-{
+) -> *mut ffi::GstAggregatorPad {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    gst::panic_to_error!(&wrap, &instance.panicked(), None, {
+    gst::panic_to_error!(&wrap, &imp.panicked(), None, {
         let req_name: Borrowed<Option<glib::GString>> = from_glib_borrow(req_name);
 
         imp.create_new_pad(
@@ -959,17 +915,14 @@ unsafe extern "C" fn aggregator_update_src_caps<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
     caps: *mut gst::ffi::GstCaps,
     res: *mut *mut gst::ffi::GstCaps,
-) -> gst::ffi::GstFlowReturn
-where
-    T::Instance: PanicPoison,
-{
+) -> gst::ffi::GstFlowReturn {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
     *res = ptr::null_mut();
 
-    gst::panic_to_error!(&wrap, &instance.panicked(), gst::FlowReturn::Error, {
+    gst::panic_to_error!(&wrap, &imp.panicked(), gst::FlowReturn::Error, {
         match imp.update_src_caps(wrap.unsafe_cast_ref(), &from_glib_borrow(caps)) {
             Ok(res_caps) => {
                 *res = res_caps.into_ptr();
@@ -984,15 +937,12 @@ where
 unsafe extern "C" fn aggregator_fixate_src_caps<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
     caps: *mut gst::ffi::GstCaps,
-) -> *mut gst::ffi::GstCaps
-where
-    T::Instance: PanicPoison,
-{
+) -> *mut gst::ffi::GstCaps {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    gst::panic_to_error!(&wrap, &instance.panicked(), gst::Caps::new_empty(), {
+    gst::panic_to_error!(&wrap, &imp.panicked(), gst::Caps::new_empty(), {
         imp.fixate_src_caps(wrap.unsafe_cast_ref(), from_glib_full(caps))
     })
     .into_ptr()
@@ -1001,15 +951,12 @@ where
 unsafe extern "C" fn aggregator_negotiated_src_caps<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
     caps: *mut gst::ffi::GstCaps,
-) -> glib::ffi::gboolean
-where
-    T::Instance: PanicPoison,
-{
+) -> glib::ffi::gboolean {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    gst::panic_to_error!(&wrap, &instance.panicked(), false, {
+    gst::panic_to_error!(&wrap, &imp.panicked(), false, {
         match imp.negotiated_src_caps(wrap.unsafe_cast_ref(), &from_glib_borrow(caps)) {
             Ok(()) => true,
             Err(err) => {
@@ -1023,15 +970,12 @@ where
 
 unsafe extern "C" fn aggregator_negotiate<T: AggregatorImpl>(
     ptr: *mut ffi::GstAggregator,
-) -> glib::ffi::gboolean
-where
-    T::Instance: PanicPoison,
-{
+) -> glib::ffi::gboolean {
     let instance = &*(ptr as *mut T::Instance);
     let imp = instance.get_impl();
     let wrap: Borrowed<Aggregator> = from_glib_borrow(ptr);
 
-    gst::panic_to_error!(&wrap, &instance.panicked(), false, {
+    gst::panic_to_error!(&wrap, &imp.panicked(), false, {
         imp.negotiate(wrap.unsafe_cast_ref())
     })
     .to_glib()

utils/fallbackswitch/src/base/subclass/aggregator_pad.rs

@@ -108,6 +108,10 @@ unsafe impl<T: AggregatorPadImpl> IsSubclassable<T> for AggregatorPad {
         klass.flush = Some(aggregator_pad_flush::<T>);
         klass.skip_buffer = Some(aggregator_pad_skip_buffer::<T>);
     }
+
+    fn instance_init(instance: &mut glib::subclass::InitializingObject<T>) {
+        <gst::Pad as IsSubclassable<T>>::instance_init(instance);
+    }
 }
 
 unsafe extern "C" fn aggregator_pad_flush<T: AggregatorPadImpl>(

utils/fallbackswitch/src/fallbacksrc/custom_source/imp.rs

@@ -59,7 +59,6 @@ impl ObjectSubclass for CustomSource {
     const NAME: &'static str = "FallbackSrcCustomSource";
     type Type = super::CustomSource;
     type ParentType = gst::Bin;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for CustomSource {

utils/fallbackswitch/src/fallbacksrc/imp.rs

@@ -182,7 +182,6 @@ impl ObjectSubclass for FallbackSrc {
     const NAME: &'static str = "FallbackSrc";
     type Type = super::FallbackSrc;
     type ParentType = gst::Bin;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for FallbackSrc {

utils/fallbackswitch/src/fallbacksrc/video_fallback/imp.rs

@@ -66,7 +66,6 @@ impl ObjectSubclass for VideoFallbackSource {
     const NAME: &'static str = "FallbackSrcVideoFallbackSource";
     type Type = super::VideoFallbackSource;
     type ParentType = gst::Bin;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("src").unwrap();

utils/fallbackswitch/src/fallbackswitch/imp.rs

@@ -647,7 +647,6 @@ impl ObjectSubclass for FallbackSwitch {
     const NAME: &'static str = "FallbackSwitch";
     type Type = super::FallbackSwitch;
     type ParentType = gst_base::Aggregator;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

utils/togglerecord/src/togglerecord/imp.rs

@@ -1621,7 +1621,6 @@ impl ObjectSubclass for ToggleRecord {
     const NAME: &'static str = "RsToggleRecord";
     type Type = super::ToggleRecord;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

video/cdg/src/cdgdec/imp.rs

@@ -33,7 +33,6 @@ impl ObjectSubclass for CdgDec {
     const NAME: &'static str = "CdgDec";
     type Type = super::CdgDec;
     type ParentType = gst_video::VideoDecoder;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for CdgDec {}

video/cdg/src/cdgparse/imp.rs

@@ -40,7 +40,6 @@ impl ObjectSubclass for CdgParse {
     const NAME: &'static str = "CdgParse";
     type Type = super::CdgParse;
     type ParentType = gst_base::BaseParse;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for CdgParse {}

video/closedcaption/src/ccdetect/imp.rs

@@ -219,7 +219,6 @@ impl ObjectSubclass for CCDetect {
     const NAME: &'static str = "CCDetect";
     type Type = super::CCDetect;
     type ParentType = gst_base::BaseTransform;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for CCDetect {

video/closedcaption/src/cea608overlay/imp.rs

@@ -545,7 +545,6 @@ impl ObjectSubclass for Cea608Overlay {
     const NAME: &'static str = "RsCea608Overlay";
     type Type = super::Cea608Overlay;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

video/closedcaption/src/cea608tott/imp.rs

@@ -375,7 +375,6 @@ impl ObjectSubclass for Cea608ToTt {
     const NAME: &'static str = "Cea608ToTt";
     type Type = super::Cea608ToTt;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

video/closedcaption/src/mcc_enc/imp.rs

@@ -449,7 +449,6 @@ impl ObjectSubclass for MccEnc {
     const NAME: &'static str = "RsMccEnc";
     type Type = super::MccEnc;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

video/closedcaption/src/mcc_parse/imp.rs

@@ -1122,7 +1122,6 @@ impl ObjectSubclass for MccParse {
     const NAME: &'static str = "RsMccParse";
     type Type = super::MccParse;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

video/closedcaption/src/scc_enc/imp.rs

@@ -337,7 +337,6 @@ impl ObjectSubclass for SccEnc {
     const NAME: &'static str = "RsSccEnc";
     type Type = super::SccEnc;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

video/closedcaption/src/scc_parse/imp.rs

@@ -1002,7 +1002,6 @@ impl ObjectSubclass for SccParse {
     const NAME: &'static str = "RsSccParse";
     type Type = super::SccParse;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

video/closedcaption/src/tttocea608/imp.rs

@@ -979,7 +979,6 @@ impl ObjectSubclass for TtToCea608 {
     const NAME: &'static str = "TtToCea608";
     type Type = super::TtToCea608;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

video/closedcaption/src/tttojson/imp.rs

@@ -192,7 +192,6 @@ impl ObjectSubclass for TtToJson {
     const NAME: &'static str = "RsTtToJson";
     type Type = super::TtToJson;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

video/dav1d/src/dav1ddec/imp.rs

@@ -351,7 +351,6 @@ impl ObjectSubclass for Dav1dDec {
     const NAME: &'static str = "RsDav1dDec";
     type Type = super::Dav1dDec;
     type ParentType = gst_video::VideoDecoder;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for Dav1dDec {}

video/flavors/src/flvdemux/imp.rs

@@ -124,7 +124,6 @@ impl ObjectSubclass for FlvDemux {
     const NAME: &'static str = "RsFlvDemux";
     type Type = super::FlvDemux;
     type ParentType = gst::Element;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 
     fn with_class(klass: &Self::Class) -> Self {
         let templ = klass.get_pad_template("sink").unwrap();

video/gif/src/gifenc/imp.rs

@@ -135,7 +135,6 @@ impl ObjectSubclass for GifEnc {
     const NAME: &'static str = "GifEnc";
     type Type = super::GifEnc;
     type ParentType = gst_video::VideoEncoder;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for GifEnc {

video/hsv/src/hsvdetector/imp.rs

@@ -80,7 +80,6 @@ impl ObjectSubclass for HsvDetector {
     const NAME: &'static str = "HsvDetector";
     type Type = super::HsvDetector;
     type ParentType = gst_base::BaseTransform;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for HsvDetector {

video/hsv/src/hsvfilter/imp.rs

@@ -75,7 +75,6 @@ impl ObjectSubclass for HsvFilter {
     const NAME: &'static str = "HsvFilter";
     type Type = super::HsvFilter;
     type ParentType = gst_base::BaseTransform;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for HsvFilter {

video/rav1e/src/rav1enc/imp.rs

@@ -209,7 +209,6 @@ impl ObjectSubclass for Rav1Enc {
     const NAME: &'static str = "Rav1Enc";
     type Type = super::Rav1Enc;
     type ParentType = gst_video::VideoEncoder;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for Rav1Enc {

video/rspng/src/pngenc/imp.rs

@@ -170,7 +170,6 @@ impl ObjectSubclass for PngEncoder {
     const NAME: &'static str = "PngEncoder";
     type Type = super::PngEncoder;
     type ParentType = gst_video::VideoEncoder;
-    type Instance = gst::subclass::ElementInstanceStruct<Self>;
 }
 
 impl ObjectImpl for PngEncoder {