gstreamer-rs/gstreamer/CHANGELOG.md

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog and this project adheres to Semantic Versioning, specifically the variant used by Rust.

[0.20.5] - 2023-04-22

Added

• glib::HasParamSpec impl for miniobjects to allow using them with the properties derive macro.
• Default impl for gst_player::Player.

[0.20.4] - 2023-04-07

Fixed

• Work around gst_webrtc::WebRTCICE::add_candidate() API breakage in 1.24.

Changed

• Reduce size of gst_audio::AudioBuffer and gst_video::VideoFrame by a factor of two by not storing an unnecessary copy of the audio/video info.

0.20.3 - 2023-03-14

Fixed

• gst::ParamSpecArray uses the correct glib::Type now.
• Work around accidental ABI breakage in 1.18 gst-rtsp-server GstRTSPClient.

Added

• Document gst_utils::StreamProducer::forward_eos() default value.

0.20.2 - 2023-02-21

Added

• glib::HasParamSpec impl for gst::ClockTime
• Default impl for gst_play::Play
• Constructors for non-raw gst_audio::AudioCapsBuilder / gst_video::VideoCapsBuilder

0.20.1 - 2023-02-13

Fixed

• Fix memory leaks when converting a gst_audio::AudioBuffer or gst_video::VideoFrame to a gst::Buffer or FFI type.

0.20.0 - 2023-02-10

Fixed

• Make gst_gL::GLDisplay::create_context() other_context parameter optional.
• Make allocation query caps optional.

Added

• Conversions between gst::Signed<T> and T and signed integer types.
• Bindings for the object lock via gst::Object::lock().
• Various FromIterator, Extend and From impls for creating Caps, Structure, Buffer, BufferList, CapsFeatures and other types.
• PartialEq impls between owned/borrowed miniobjects/structures.
• API for appending items to gst::Array and gst::List.

Changed

• Compatible with the 0.17 gtk-rs release.
• Updated minimum supported Rust version to 1.64.
• Require GStreamer 1.22.0 or newer when enabling the v1_22 feature.
• Require the object lock to be taken for various gst_gl::GLDisplay methods.
• Renamed gst::TagSetter::add() to add_tags() to avoid name conflict with Bin::add().
• Mark various un-extendable enums as exhaustive.
• Make use of glib::GStr and related API in caps, structure, tags and logging API to reduce temporary string allocations.
• Various code optimizations to reduce generated code size and allow more optimal code to be generated.
• Reduce size of various types, including reduction of gst_audio::AudioInfo from 832 to 320 bytes.
• Use actual function name instead of module name in log output.
• Change gst_utils::StreamProducer API to forward buffers by default and allow temporarily discarding via new set_discard() function.

0.19.8 - 2023-02-09

Changed

• Update GStreamer .gir files to 1.22.0 release.

Fixed

• Marked gst::MessageType as non-exhaustive.

Added

• Added bindings for gst::Message::structure_mut().
• Added subclassing support for gst_allocators::FdAllocator and DmabufAllocator.

0.19.7 - 2023-01-19

Fixed

• Work around the possibility that the caps in the allocation query can be NULL by returning any caps for now. This will be handled properly with a minimal API change in the 0.20 release.

0.19.6 - 2023-01-18

Fixed

• The AppSrc and AppSink builders now assert that GStreamer is initialized before creating an instance.

0.19.5 - 2022-12-27

Fixed

• Clear video frame values when mapping as GL texture to avoid out of bounds reads when trying to access the GL texture as raw video frame.
• Allow returning Handled from BufferList pad probes.

Changed

• Update GStreamer .gir files to latest 1.21 git.

0.19.4 - 2022-12-16

Added

• Subclassing bindings for gst_audio::AudioFilter.

Fixed

• Various new clippy warnings.

Changed

• Update GStreamer .gir files to 1.21.3 release.

0.19.3 - 2022-11-28

Added

• FromIterator<Caps> and Extend<Caps> for Caps.
• PartialEq impls between owned/borrowed miniobjects/structures.

Fixed

• Sticky event ordering for instant-rate-change.

Changed

• Updated GStreamer .gir files to post 1.22.2 release.

0.19.2 - 2022-11-13

Added

• Subclassing support for gst::Allocator.
• gst_gl::GLBaseMemory::context() to retrieve the GL context used by the memory.

Changed

• Updated GStreamer .gir files to 1.22.2 release.

Fixed

• gst::Allocator::register() does not cause use-after free with GStreamer < 1.20.5 anymore.
• Don't generate version constants in gstreamer-editing-services-sys as they are useless and change with every update.

Changed

• Fixed various new clippy warnings.

0.19.1 - 2022-10-24

Changed

• Make it possible to use objects not just as reference in the logging macros.

0.19.0 - 2022-10-22

Added

• Builders for element construction. gst::ElementFactory::make() returns a builder now that allows to easily set the name or any other property at construction time. The old API is available as make_with_name().

• Builders for Bin and Pipeline as well as a Default trait implementation to simplify object construction.

• Builders for appsrc and appsink, which allow type-safe construction of both elements while also allowing to easily set all their properties at construction time.

• Builders for the GStreamer-specific fraction/array param/property specs.

• Infrastructure for casting between gst::Memory subtypes/supertypes, and make use of it for GL memory.

• Bindings for the gstreamer-allocator library with support for file descriptor-based and DMABUF memory.

• Complete bindings for gst_video Navigation events.

• Constructors for error/warning/info messages with a pre-built glib::Error. This also leads to some minor simplification of the existing API.

• Accessors for static pads of various base classes for making accessing them cheaper and less error-prone than getting them by name.

• Builder for pad templates.

• Static PTP clock API for statistics, initialization and deinitialization.

• New gstreamer-utils crate that currently contains only a StreamProducer API. This allows building 1:N bridges between live pipelines via appsink / appsrc elements.

• Bindings for the new gstreamer-play library that was added in 1.20.

• gst::Caps::new_empty_simple() to create caps without fields and just a name.

• gst_audio::AudioCapsBuilder and gst_video::VideoCapsBuilder for building (possibly) unfixed raw audio/videos caps with typed setters for the various fields. This makes it impossible to mix up types and e.g. use an u32 instead of an i32 for the width of video caps.

• gst::Buffer::ptr_eq() to compare buffers by pointer instead of doing a deep comparison, and also ptr_eq() on all other miniobject types.

• Accessors for gst_webrtc::WebRTCICECandidateStats fields.

• Bindings for the gstreamer-validate API.

• Subclassing bindings for gst_audio::AudioVisualizer base class for easily writing audio visualization elements.

• gst_pbutils::EncodingProfile API for element properties.

• Support for returning buffer lists from BaseSrc / PushSrc subclasses.

• Support for implementing gst::Bin::do_latency().

• Minimal bindings for the gstreamer-mpegts library.

Fixed

• Signature for gst_base::Aggregator::connect_samples_selected() to remove unnecessary generic parameter and make it straightforward to use.

• Various APIs had optional parameters/return types corrected to match the C API more closely.

• Logging does not evaluate its arguments anymore if the debug category is not enabled or below the current threshold.

• Registering custom metas is now possible without transform function.

• gst::subclass::ElementImpl::request_new_pad() signature uses a &str instead of an owned String now.

Removed

• fragile dependency and instead use the same functionality from glib.

• gst_audio::AudioAggregator ignore_inactive_pads property, which was duplicated from the Aggregator base class.

Changed

• Compatible with the 0.16 gtk-rs release.

• Updated minimum supported GStreamer version from 1.8 to 1.14.

• Updated to the latest GStreamer 1.22 APIs while still supporting up to GStreamer 1.14. Any new 1.22 APIs might still change until the stable 1.22 release.

• Updated minimum supported Rust version to 1.63.

• In EventView / QueryView, getters that return references now return references that can outlive the view and are only bound by the lifetime of the corresponding event/query.

• In addition Query, Event and Message views are implemented more consistently now, which makes them easier to use and as a side effect allows to pass e.g. more strongly typed queries to functions that only accept a single query type.

• Various improvements to gst::ClockTime, gst::format::Bytes, gst::format::Signed and related types and their usage in the API, which should make its use from applications easier and less error-prone. Check the gst::format module-level documentation for details.

• gst::StreamsSelected event builder takes the selected streams as iterator instead of slice.

• For consistency with other macros the gst prefix of the logging macros was also removed.

• Various iterator implementations were added and the existing ones were optimized by implementing more specialized traits and custom implementations for a couple of iterator functions.

• GStreamer initialization safety checks were optimized.

• gst::Bus::post() takes ownership of the passed messages like the C API.

• Better and easier to read Debug impls for Caps, TagList, Structure and Promise.

• ser_de feature was renamed to serde.

• gst::Tracer implementations get result enums passed as Results now instead of single enums.

• gst::Pad, ProxyPad, GhostPad default functions are all associated functions instead of methods now to avoid conflicts between multiple types with the same method.

• Pad tasks are catching panics from the task function and if the parent of the pad is an element then the panic is converted into an error message and the task is simply stopped. Otherwise the panic is rethrown.

0.18.8 - 2022-04-26

Added

• Bindings for RTPBasePayload and RTPBaseDepayload.
• Accessors for RTPBuffer buffer.
• Bindings for RTPBuffer length calculation API.
• More complete gst::Task bindings.

Fixed

• Export gst::subclass::TaskPoolFunction.

0.18.7 - 2022-04-04

Added

• Bindings for VideoAggregator and the VideoAggregatorPads.
• Bindings for AudioAggregator and the AudioAggregatorPads.
• Bindings for TaskPool.
• Various helper functions for VideoFormatInfo, VideoInfo and VideoFrame.

0.18.6 - 2022-03-08

Fixed

• Require Send and not Sync for the values of an gst::Array / gst::List.

Changed

• Simplify and speed up log message string construction

0.18.5 - 2022-02-20

Changed

• Require GStreamer 1.20.0 at least when building with v1_20. Earlier versions were already going to fail due to API mismatches before.

Added

• gst::BufferPool subclassing support.
• Debug impl for gst::MiniObject.
• gst_rtsp_server::RTSPOnvifServer and related API, including subclassing support.

Fixed

• Handle empty slices correctly at the FFI layer.
• MiniObjectRef::downcast_ref() and similar functions return the correct type now. While this is an API change, the previous API would've never worked.

0.18.4 - 2022-02-04

Changed

• Update gir files to GStreamer 1.20.0 release.

Added

• gst_video::VideoCodecFrame::input_buffer_owned() for getting an owned reference.

Fixed

• All documentation links in the README.mds are correct again.

0.18.3 - 2022-01-31

Added

• Default implementation for gst_video::VideoOverlayComposition when targeting GStreamer 1.20.
• gst_video::VideoOverlayComposition::add_rectangle() in addition to the addition of all rectangles via an iterator during construction.
• Subclassing support for gst_rtp::RTPHeaderExtension.
• gst_webrtc::WebRTCError for programmatically handling WebRTC errors.

Fixed

• gst_rtp::RTPHeaderExtension has gst::Element set as parent class now.
• Global functions are re-exported from the gst_rtp crate root.

Changed

• GIO-style async operations in GES no longer need Send-able closures.

Removed

• fragile is no longer a dependency and instead the corresponding GLib API is used.

0.18.2 - 2022-01-24

Added

• glib::FromValue for mini object references.
• Bindings for gst::DebugCategory::get_line().

0.18.1 - 2022-01-18

Fixed

• Message::view() also handles the redirect message now.
• Message and Query view variants that return references now borrow again from the underlying query and not the view enum, allowing to use them in a wider scope.

Changed

• All miniobjects, VideoTimeCode, Structure and CapsFeatures are marked as #[repr(transparent)] now to ensure that their memory representation is exactly the underlying raw pointer.

0.18.0 - 2022-01-16

Added

• gst_rtp::RtpHeaderExtension::read() and write().
• gst::ElementMetadata has a const constructor now.
• gst_rtp::RtpBuffer API works on buffer references instead of plain buffers for statically enforcing writability and usage in more places.
• gst_video::VideoCodecAlphaMeta and gst::CustomMeta.
• gst::MiniObject for generically passing around mini objects instead of their concrete types.
• gst_app::AppSink new-event callback and pull_object() function.
• gst_pbutils::PbUtilsCapsDescriptionFlags and pb_utils_get_caps_description_flags().
• gst_rtp::RtpBuffer::remove_extension_data().
• gst_video::VideoDecoder subframe API.
• gst_webrtc::WebRTCSCTPTransport.
• gst::ElementFactory create_with_properties() / make_with_properties().
• gst_video::VideoContentLightLevel and VideoMasteringDisplayInfo for HDR signalling.
• Lots of missing GES API.
• gst::AllocationParams and support in the allocation query.
• propose_allocation() and decide_allocation() support in the various base classes.
• Iterator implementation for gst_video::VideoOverlayComposition.
• Extend, IntoIterator and FromIterator implementations for Buffer, Caps, BufferList, CapsFeatures, StreamCollection and Structure for more natural Rust APIs.
• instant-rate-change events/messages bindings.
• Support for arithmetic operations on Option<gst::ClockTime> and related types.
• gst_video::ColorBalance.
• gst::MetaFlags.
• gst_base::Aggregator::set_position().
• Convenience getters for gst::ElementFactory and gst::DeviceProviderFactory metadata.
• gst_rtp::RtpBuffer::set_padding(), get_padding() and payload_mut().
• #[must_use] to many types and functions.
• gst::Event, gst::Message and gst::Structure has_name().
• gst_video::Navigation subclassing support and API improvements.
• gst::Structure and gst::Caps foreach(), map_in_place() and filter_map_in_place().
• gst_gl::GLBufferPool and various GL constants and functions.
• gst_pbutils codec utils APIs.

Fixed

• gst_base::BaseTransform::prepare_output_buffer() correctly reflects buffer writability.

Changed

• Compatible with the 0.15 gtk-rs release.
• Updated to the latest GStreamer 1.20 APIs while still supporting up to GStreamer 1.8. Any new 1.20 APIs might still change until the stable 1.20 release.
• Update all code to the Rust 2021 edition. This causes no user-facing changes.
• gst::Sample::segment() returns a reference instead of a copy of the segment.
• gst::Object::set_property_from_str() returns a Result now instead of silently failing like the C version.
• Allow handling passed in buffers in gst_base::PushSrc::create.
• Allow passing in None in gst_player::Player::set_uri().
• Use [[f32; 4]; 4] instead of [f32; 16] for affine transformation matrix.
• gst::Pad::sticky_event() statically gets the event of the requested type instead of requiring to match on it afterwards.
• Clean up gst_pbutils EncodingProfile API to be harder to misuse and less confusing.
• Various gst::Array, gst::List, gst::IntRange and gst::Fraction API improvements that should reduce some friction.
• Directly generate NUL-terminated C strings in debug log API instead of having multiple allocations per message.
• Various functions return glib::SList and glib::List now to avoid copying into a Vec if only iteration is needed.
• gst::ChildProxy API is more consistent with object property API.
• Improved gst::Buffer::foreach(), gst::Pad::sticky_events_foreach() and gst::BufferList::foreach() APIs.
• Don't post error messages from propose_allocation() and decide_allocation().

0.17.4 - 2021-09-13

Added

• Add constructor for device provider metadata.

0.17.3 - 2021-08-23

Fixed

• gst::Value::deserialize() takes the target type as parameter now. This is technically an API change but the function would've never worked previously.

Added

• The release date-time parameter to gst::plugin_define! is optional now like in the C version of the macro.
• Bindings to gst::Tracer and gst::TracerFactory for allowing to implement custom tracers in Rust.
• Bindings for the new gst::Value::deserialize_with_psec() function from GStreamer 1.20.
• serde Serialize/Deserialize impls for gst::PadDirection, gst::PadPresence, gst::URIType and gst::Rank.

0.17.2 - 2021-08-05

Fixed

• Various new clippy warnings.
• Compilation of gstreamer-audio on big-endian platforms.

Added

• Support for 1.20 Gap event GapFlags.
• Support for 1.20 Structure::serialize() / Caps::serialize().

0.17.1 - 2021-07-13

Fixed

• Store 1.19 as plugin version when building plugins with v1_20. Otherwise plugins fail to load with GStreamer versions below 1.20.0.
• Fix documentation for gst::Element::request_pad_simple() to actually show up.

0.17.0 - 2021-06-28

Fixed

• Use #[repr(transparent)] where it is more correct and remove unneeded #[repr(C)] annotations.
• Don't provide direct access to the logged object in logging functions as the object might currently be finalized and might be unsafe to access.
• Moved X11/EGL/Wayland-specific GL APIs into their own crates instead of having them inside gstreamer-gl and behind feature flags. This simplifies conditional usage of them in applications.
• Various nullability issues: parameters and return values that should've been or shouldn't have been nullable were fixed.
• Print source object correctly in gst::Message Debug impl.
• gst_rtsp_server::RTSPServer::attach() is fallible.
• gst::ElementFactoryListType is a proper bitflags type now instead of generic u64.
• gst::PluginFeature::load() returns the same type as the one passed in.
• Value returned by gst::PromiseFuture can no longer be freed while still in scope.
• Only assign to GError**s in subclassing code if they're not NULL.

Added

• Bindings for the GStreamer Controller library and the corresponding core API.
• Subclassing support for gst_player::PlayerVideoRenderer.
• gst::PARAM_FLAG_CONTROLLABLE and related bindings.
• gst_video::VideoOrientation and VideoOrientationMethod bindings.
• Support for removing pad probes from inside the pad probe callback.
• gst_check::Harness::pull_until_eos() bindings.
• ges::TransitionClip and OperationClip.
• Bindings for gst_gl::GLMemory and related APIs.
• Subclassing support for gst_gl::GLFilter and gst_gl::BaseSrc.
• gst::TagList::remove().
• gst::CapsFeatures and gst::Structure API based on glib::Quarks instead of strings.
• Subclassing support for gst_video::VideoFilter.
• Bindings for various new 1.20 APIs: gst_app::LeakyType, gst_video::VideoDecoderRequestSyncPointFlags, gst_rtp::RTPHeaderExtension, gst_audio::AudioLevelMeta, gst_webrtc::WebRTCKind and various other new flags/enum types.
• Subclassing support for gst_rtsp_server::RTSPMountPoints.

Removed

• Deprecated APIs in 0.16.
• Don't declare that gst_app::AppSink and AppSrc inherit from gst_base::BaseSink and BaseSrc to avoid exposing API that is meant for subclasses to applications.
• gst_app::AppSrc and AppSink signals that are also covered by the callbacks. The callbacks are more flexible and have lower overhead.
• Duplicated getters/setters for gst_base::BaseSink and BaseTransform properties.

Changed

• Compatible with the 0.14 gtk-rs release.
• Updated to the new GStreamer 1.20 APIs while still supporting up to GStreamer 1.8. Any new 1.20 APIs might still change until the stable 1.20 release.
• FFI and safe high-level bindings are in the same repository now and use the same version numbers.
• The .gir files are shared with gtk-rs and the GStreamer-specific ones are in a separate git submodule.
• Update all code to the Rust 2018 edition. As part of this, most macros lost their gst_ prefix.
• Re-export dependency crates from the different preludes.
• Getter functions don't have a get_ prefix anymore and GObject property accessors don't include the _property_ part in the middle of their function names anymore. Applications developers should use fix-getters-calls to ease migration of their applications. Use fix-getters-def if you also want your get functions definition to comply with the API standards applied in this release.
• Lots of changes to the subclassing API. Check the various elements in gst-plugins-rs for examples.
• Major improvements to the documentation infrastructure and generated documentation.
• gst::ClockID bindings are refactored to use different types for single-shot and periodic clock ids, which makes misuse harder.
• gst::ProxyPad extension trait uses trait functions instead of associated functions now for usability reasons.
• Use Result<gst::FlowSuccess, gst::FlowError> for overriding flow returns from pad probes.
• gst_video::VideoInfo::align() returns a Result instead of a bool.
• Use actual error types instead of () in gst_sdp APIs.
• Display impl for gst::ClockTime provides better human-readable strings.
• gst::Element::link_filtered() and link_pads_filtered() takes a non-optional caps now. That's easier to use and for not providing caps the non-filtered variants of the functions exist.
• Replace various manual bindings with auto-generated ones.
• gst::Element::get_request_pad() is replaced by request_pad_simple() as a simpler version of request_pad() and in accordance with the deprecation in GStreamer 1.20.
• gst::ClockTime and APIs working on it were changed to make possibility of using GST_CLOCK_TIME_NONE expressed in the type system. Option<gst::ClockTime> can be None while gst::ClockTime is always a valid time.

0.16.7 - 2021-02-13

Fixed

• Usage of the logging system with a GStreamer library with the logging system compiled out does not crash any longer.
• Double-free in gst_video::VideoTimeCode API when converting between validated and unvalidated timecodes.

Added

• gst::Element::get_current_state() and get_pending_state() convenience APIs.
• gst_audio::AudioConverterConfig for setting the configuration on e.g. the audiomixer element. The low-level AudioConverter API is still not included in the bindings.

0.16.6 - 2020-12-20

Fixed

• VideoTimeCodeInterval's Ord and PartialEq implementations compare against the correct fields now.
• SDPMessage::medias_mut() iterator does not crash any longer.

Added

• PartialEq and Eq implementations on VideoAlignment.
• Alignment API for VideoMeta and get_plane_height() / get_plane_size().
• VideoInfo::align_full().

0.16.5 - 2020-11-23

Fixed

• Make sure to use $crate in more macros to allow them to work without anything special in scope already.
• Update documentation location.
• Don't panic if C code stores invalid seqnums in events and the seqnum is used directly or via the Display impl.
• Fix docs build for some crates on docs.rs.
• Fix Debug impl for gst_video::VideoTimeCode to print the correct type name.
• Fix plugin version to be 1.18 instead of 1.17 when compiling a plugin with v1_18.

Added

• Event handling support in pad probes, that is returning PadProbeReturn::Handled for events.
• EventRef::get_structure_mut() getter that allows changing the events' structures.

Changed

• Remove unnecessary PhantomData markers and use repr(transparent) instead of repr(C) where it is more correct.

0.16.4 - 2020-10-09

Fixed

• Correctly implement ExactSizeIterator on the AudioFormat and VideoFormat iterators. Previously they returned the overall size instead of the remaining size, and they didn't implement Iterator::size_hint().
• Don't implement ExactSizeIterator on the buffer gst::Meta iterator. The overall length is not known easily and the implementation would've simply panicked in the past.

Added

• gst::ClockID::wait_async_stream() for async integration for clock waiting.
• From / TryFrom impls for converting between gst::ClockTime and std::time::Duration.

0.16.3 - 2020-09-08

Fixed

• Reset vfuncs if calling BaseTransformClass::configure() multiple times.
• Fix gst::debug_remove_default_log_function() to actually remove the default log function.

Added

• Some more new APIs added in 1.18.
• API for getting an owned buffer from a readable gst_video::VideoFrame / VideoFrameRef.

Changed

• Updated bindings to 1.18.0. This stabilized GStreamer 1.18 support and any API behind the "v1_18" feature is considered stable now.
• Factor out some common code from gst::Pad::ProbeInfo code. This reduces the code generated for each pad probe considerably.
• Update paste dependency to 1.0 and pretty-hex to 0.2.

0.16.2 - 2020-07-27

Fixed

• Use correct pointer for the plane data in gst_audio::AudioBuffer.

Added

• Add gst::GhostPad convenience constructors that take a target pad, similar to the ones that existed in 0.15 and before.
• Add gst::parse_bin_from_description_with_name that allows setting a name for the created bin without having to use unsafe code in application code.

0.16.1 - 2020-07-10

Fixed

• Allow calling gst::DebugCategory::new() before gst::init() again.

0.16.0 - 2020-07-06

Added

• Updated bindings to 1.17.2, adding experimental 1.18 support. This can be opted-in via the "v1_18" feature flag but there might still be API changes in the newly added API.
• gst::MemoryRef::dump() for dumping contents of a memory.
• gst::Bus::stream() instead of a custom constructor on the BusStream.
• Use more accurate types for Seqnum, GroupId and MetaSeqnum. These are now proper wrapper types instead of plain integers, which makes misuse harder.
• Provide TryFrom impls for conversion between glib::DateTime and gst::DateTime.
• Add get_allocator() functions to gst_base::{Aggregator, BaseTransform, BaseSrc}, and allow overriding BaseSrc::alloc().
• Add subclassing bindings for gst_base::PushSrc.
• Add new gst::BufferCursor API that allows to handle a buffer as Read, Write and Seek and accesses the underlying memories of the buffer individually without mapping them all together.
• Add gst::Plugin::get_plugin_name().
• Support for gst_video::VideoAFDMeta and VideoBarMeta.
• API for getting all / iterating over all gst_audio::AudioFormat and gst_video::VideoFormat.
• Bindings and subclassing bindings for gst_video::VideoSink.
• gst::Pad can be constructed via the builder pattern and gst::PadBuilder now, which allows to safely set the pad functions and various other fields during construction. The PadBuilder works on any gst::Pad subclass and also has special support for GhostPads by allowing to set pad functions of the proxy pad.
• gst::Message, gst::Event and gst::Query type constructors are now on the specific target type instead of various new_XXX() functions on the basic type. E.g. gst::message::Eos::new().
• Support for overriding gst_audio::AudioSrc/Sink::reset().
• Support for overriding gst_base::BaseParse::stop().
• Support for overriding gst::Element::post_message().
• Added bindings for gst::BufferList::foreach() and foreach_mut().
• Added bindings for gst::Buffer::foreach_meta() and foreach_meta_mut().

Fixed

• Allow using any glib::Object as target object for logging instead of just gst::Object.
• Remove restriction API from gst_pbutils::EncodingContainerProfile. They are supposed to be used only with the other encoding profiles.
• Return &'static str for various gst::StructureRef functions where the string is backed by a glib::Quark.
• Fix various gst::DateTime functions to actually return Options.
• Add support for filling in a buffer passed to the gst::Pad getrange function, allow passing one in into get_range() and pull_range() and provide the corresponding API on gst_base::BaseSrc too.
• Allocator in audio/video Decoder base classes is optional and can return None.
• gst_video::ValidVideoTimeCode::add_interval() always returns a valid timecode again.
• Allow resolving a gst::Promise with None and also handle that correctly in the callback. This is allowed by the API.
• Allow calling various debugging related functions before gst::init().
• Various enum/function versions were fixed to only show up if the corresponding version feature is enabled.
• gst::Pad function setters are marked unsafe now as changing the functions is not thread-safe.
• Remove gst::Object::set_name() as changing the name after construction generally causes problems and is potentially unsafe.
• Remove gst::Pad::set_pad_template() as changing the pad template after construction is generally unsafe.
• gst::Pad::stream_lock() borrows the pad now instead of taking a new reference.
• Unimplemented Jitter and Buffer queries were removed from the bindings. These are not implemented in C and only have a type registered.
• Various LAST, NONE variants of enums and flags were removed as these only make sense in C.
• Call the parent impl of various vfuncs that were omitted before to not require further subclasses of them to implement them but automatically call the parent ones.

Changed

• Use NonZeroU64/U32 for various ID types to allow further optimizations.
• Use thiserror crate for deriving error types.
• Switch from lazy_static to once_cell.
• Change various miniobject functions like gst::Caps::append() from taking the object by value to modifying it internally. This makes them easier to use and only applies to functions that are defined on the non-reference type and take ownership of the values passed in.
• Use mem::ManuallyDrop instead of mem::forget() everywhere.
• Replace most mem::transmute() calls with safer alternatives.
• gst:StreamCollection API was changed to the builder pattern for construction as the collection must not be changed after construction.
• gst::ProxyPad default functions are plain functions on ProxyPad now instead of trait functions to allow easier usage of them.
• Use proper error types in various TryFrom impls.
• gst_video::VideoMeta::add() returns a Result now instead of panicking.
• Various constructors were renamed from new_with_XXX() and new_from_XXX() to the more idiomatic with_XXX() and from_XXX().
• Miniobject bindings are simplified now and there is no gst::GstRc type anymore, instead everything is directly implemented on the concrete types. As part of this the gst::MiniObject trait was also removed as it was unneeded now.

0.15.7 - 2020-06-08

Fixed

• Allow multiple filter types per process with gst::Iterator::filter().
• Check that VideoInfo is valid when creating a VideoFrame.
• Don't potentially dereference a NULL pointer when getting the format from an invalid VideoInfo or AudioInfo.
• Don't unmap borrowed VideoFrameRefs.

Added

• gst::ProtectionMeta, gst_video::VideoAffineTransformationMeta, VideoCropMeta and VideoRegionOfInterestMeta bindings.
• Various new gst_rtp::RTPBuffer methods.
• gst_audio::audio_buffer_truncate(), AudioMeta and AudioBuffer bindings.

0.15.6 - 2020-05-28

Fixed

• Assert that the data passed to VideoCaptionMeta::add() is not empty.
• Don't store strong references to the object in the bus, appsink and appsrc futures Stream / Sink adapters. This would keep them alive unnecessarily and would prevent the Stream / Sink to ever "finish" on its own.
• Handle receiving a None reply in the change function of gst::Promise. This is apparently valid. For backwards compatibility reasons this is currently replaced with an empty structure but in 0.16 the API will explicitly handle None.

Added

• gst::Stream::debug() and gst::StreamCollection::debug() for converting into a structured string with the actual contents of each.
• gst::Structure::from_iter() and gst::Caps::from_iter() to create structures/caps from iterators.
• gst::Event support for getting/setting the gst::Stream in the StreamStart event.
• gst_video::calculate_display_ratio() and ::guess_framerate().
• Various video related gst::CapsFeatures in gst_video.
• TryFrom/From impls for converting between gst::Structure and gst_video::VideoConverterConfig.
• Various glib::Value trait impls for SDPMessage, StructureRef, CapsFeatureRef and all borrowed variants of miniobjects to be able to work with the borrowed, non-owned variants when handling glib::Values.

0.15.5 - 2020-05-03

Fixed

• Revert: Allow logging any glib::Object and not just gst::Object. This broke API in subtile ways and needs to wait until 0.16
• Replace % in log output with %% to prevent accidental C formatting
• Add missing manual traits to the documentation

Added

• BufferRef::peek_memory_mut() to give a mutable reference to a given memory
• Different iterators for iterating over the memories of a buffer
• Support for gst_audio::AudioClippingMeta
• gst::Plugin::get_plugin_name() was added
• gst::Element::get_current_clock_time() and `gst::Element::get_current_running_time() helper functions
• gst::State and StateChange API for calculating next/previous state and convert from/to the components of a state change

Changed

• Use mem::ManuallyDrop instead of mem::forget everywhere

0.15.4 - 2020-03-09

Fixed

• Allow logging any glib::Object and not just gst::Object
• Fix floating reference handling in RTSPMedia::take_pipeline()
• Hold GMutex guards for the remainder of the function and warn if they're directly dropped
• Work around empty/any caps handling bugs in Caps::fixate()

Added

• Add BaseTransform::prepare_output_buffer() subclassing support
• RTSPServer, RTSPClient, RTSPMedia and RTSPMediaFactory subclassing support
• Handle panicking in appsrc/appsink callbacks by posting an error message instead of killing the process

0.15.3 - 2020-02-15

Fixed

• UniqueFlowCombiner::clear() should take a mutable reference.
• AudioStreamAlign doesn't require mutable references for getters anymore.
• Don't use bool return value of gst_video_info_set_format() and gst_video_info_align() with GStreamer < 1.11.1 as it returned void back then. We'd otherwise use some random value.
• Make VideoInfo::align() is available since 1.8.
• Fix changing/clearing of AppSrc, AppSink callbacks and Bus sync handler. Before 1.16.3 this was not thread-safe and caused crashes. When running with older versions changing them causes a panic now and unsetting the bus sync handler has not effect. With newer versions it works correctly.

Added

• Add Clone impls for BufferPoolConfig and PlayerConfig.
• Add VideoConverter bindings.
• Add Futures variant for gst::Promise constructor.
• Add Futures variant for gst_video::convert_sample_async().
• Add submit_input_buffer(), generate_output(), before_transform(), copy_metadata() and transform_meta() virtual method support for BaseTransform.
• Add AppSink Stream adapter and AppSrc Sink adapter for integrating both into Rust async contexts.

Changed

• More generic implementations of VideoFrame / VideoFrameRef functions to allow usage in more generic contexts.

0.15.2 - 2020-01-30

Fixed

• Fix another race condition in the gst::Bus Stream that could cause it to not wake up although a message is available.

0.15.1 - 2020-01-23

Added

• Use static inner lifetime for VideoCodecState<Readable> so that it can be stored safely on the heap.
• Getters/setters for BinFlags on gst::Bin.
• gst::Caps::builder_full() for building caps with multiple structures conveniently.
• gst::Element::call_async_future() for asynchronously spawning a closure and returning a Future for awaiting its return value.

Fixed

• Various clippy warnings.
• Getters/setters for PadFlags on gst::Pad now provide the correct behaviour.
• Take mutex before popping messages in the gst::Bus Stream to close a small race condition that could cause it to not be woken up.
• gst::ChildProxy implementers do not have to provide child_added() and child_removed() functions anymore but these are optional now.
• Manually implement Debug impls for various generic types where to Debug impl should not depend on their type parameters also implementing Debug.

0.15.0 - 2019-12-18

Added

• StructureRef::get_optional() for returning None if the field does not exist instead of Err
• Bindings for gstreamer-rtp library, mostly RTPBuffer
• Support for writing Preset, TagSetter, Clock, SystemClock subclasses
• Bindings for Typefind::get_length()
• Bindings for BaseSrcImpl::get_times()
• Bindings (incl. subclassing) for AudioSink and AudioSrc
• Missing Send/Sync impl for various types

Fixed

• Cleanup of cargo features/dependencies to improve build times
• Serde serialization with optional values. Attention: This changes the format of the serialization!
• VideoEncoder/VideoDecoder proxy_getcaps() can't return None
• Use non-panicking UTF8 conversion in log handler. We don't want to panic just because some C code printed a non-UTF8 string
• Re-rexport all traits from the crate level and also ensure that all traits are actually included in the preludes
• Actually export is_video_overlay_prepare_window_handle_message() function
• Use FnMut for the appsink callbacks instead of Fn
• Promise change function returns the actual reply to the promise now instead of just passing the promise itself
• Memory leak in Iterator::filter()
• BinImpl::add() takes ownership of floating references
• DeviceImpl::create_element() preserves floating flag
• BinImpl::remove() takes a strong reference of the element now as the last reference might be owned by the bin and otherwise we would potentially have a use-after-free afterwards
• BaseParseFrame and VideoCodecFrame take a &mut self now for various functions that actually change the frame

Changed

• Minimum supported Rust version is 1.39
• Allow passing None to VideoEncoder::finish_frame()
• Various to_string() methods were moved into the Display trait impl and for some types to_str() was added to return a &'static str
• .gir files were updated to 1.16.2 release
• Sample constructor uses the builder pattern now
• VideoMeta::add_full() is simplified and requires parameters
• BasetransformImpl::set_caps() returns a Result instead of bool
• SDP data type getters for strings return an Option now as these can be None in practice although not allowed by the SDP spec
• Various functions returning Options were changed to return Results if None actually signalled an error instead of just a missing value

Removed

• "subclassing" and "futures" cargo features. These are enabled by default now

[0.14.5] - 2019-09-17

Added

• Support subclassing of gst::Device, gst::DeviceProvider, gst_audio::AudioDecoder and ::AudioEncoder
• Support for Element::set_clock and ::provide_clock virtual methods
• ElementClass::add_metadata was added
• gst_video::VideoDecoder and ::VideoEncoder got support for get_caps, negotiate, src/sink_query/event and the drain virtual methods
• Element::num_pads, ::num_src_pads and ::num_sink_pads functions
• gst_video::VideoDecoder and ::VideoEncoder got get_allocator bindings
• gst::Iterator implements IntoIterator now for providing std::iter::Iterator<Item=<Result<T, IteratorError>> adapter
• Error macros for audio/video decoder subclasses to handle decoding errors more gracefully and only actually error out after many consecutive errors

Fixed

• Macros now also work in Rust 2018 edition without #[macro_use] but explicit imports
• The log handler unit test runs reliable in parallel with other tests
• Manually implement Debug for gst::Iterator to allow it for any T instead of T: Debug
• Device::create_element has correct reference count handling now
• Return NotNegotiated in the video codec base classes if setting the output state fails instead of Error

[0.14.4] - 2019-08-14

Added

• Bindings for adding/removing custom log functions
• Bindings for calculate_linear_regression()
• Constants for base class custom flow returns

Fixed

• Ownership of pad in Element::release_pad() virtual method implementations

[0.14.3] - 2019-07-16

Added

• Buffer::unset_flags() for unsetting specific buffer flags
• VideoBufferFlags flags type and VideoBufferExt::set_video_flags(), unset_video_flags() and get_video_flags() for working with video buffer flags from safe code.

Fixed

• Setting buffer flags does not override arbitrary other flags anymore but only sets the flags in question. This is necessary to not override extension buffer flags like gst_video::VideoBufferFlags.

0.14.2 - 2019-07-15

Added

• Support for ReferenceTimestampMeta

0.14.1 - 2019-07-06

Added

• Various new WebRTC enum types from 1.14.1/1.16.0

Fixed

• Correctly generate interlaced VideoInfo by using gst_video_info_set_interlaced_format() instead of the generic function.
• serde serialization unit tests for gst::format succeed again now.

Changed

• Debug impls for VideoFormatInfo and AudioFormatInfo now print all the details of the format instead of only the name, and the Debug impls for VideoInfo and AudioInfo also print the format now.

0.14.0 - 2019-06-24

Added

• Bindings for GLSyncMeta.
• Bindings for setting/getting TagScope on a TagList
• Bindings for GLDisplayWayland and GLDisplayX11 in addition to the already existing GLDisplayEGL
• Bindings for Bus::pop_filtered() and related functions
• Bindings for getting/setting Object, Element, Bin, Pipeline and Plugin flags
• Bindings for VideoCaptionMeta
• Debug impl of Buffer now also shows the metas of the buffers
• Expose flow return in PadProbeInfo for overriding the return value
• Bindings for VideoDecoder and VideoEncoder, including subclassing support
• Bindings for Memory, Allocator and VideoBufferPool
• Bindings for VideoFormatInfo::pack and ::unpack for format conversion
• Bindings for BaseParse, including subclassing support
• Various new arithmetic operation impls for fractions, formatted values and ClockTime
• Bindings for VideoInfo::align()

Changed

• The SDPMessage and SDPMedia bindings were completely rewritten as they were broken before and caused crashes in various usages. As part of this there's also some more convenience API available on these types, like iterators for example, and API to modify the SDPMedia contained in a SDPMessage.
• Update to GStreamer 1.16.
• Regenerate with latest gir.
• Run all autogenerated code through rustfmt after generation too.
• Updated to latest versions of GLib/GIO/etc crates.
• Updated to futures 0.3 / std::future
• ProxyPad default functions moved to an extension trait instead of plain functions on ProxyPad, making them more in sync with the default Pad functions
• GStreamer plugins are now exporting the new 1.14+ plugin symbols if they were configured for GStreamer 1.14+
• Arithmetic operations on formatted values and ClockTime do overflow checks now and replace the result with the NONE value on overflow
• TryFrom/TryInto traits are used in various places now instead of the previous ad-hoc implementations of them.
• Registering element/typefind/device monitor factories requires passing a value of gst::Rank now instead of an arbitrary u32

Fixed

• Use correct type for destroying pad task closure data. This was previously using the wrong type, causing crashes at runtime.
• DeviceAdded/DeviceRemoved message getters are transfer full so we don't need to take an additional reference that would be leaked.
• AppSink callbacks are correctly marked as Send instead of Send+Sync, allowing a wider range of closures to be used for them.
• Handle PadProbeReturn::Handled return values from pad probes more correctly.
• ToOwned::to_owned() on miniobjects has to create copies instead of only increasing the reference count. Otherwise it was possible to create multiple mutable and immutable references to the same object at the same time.
• Various functions take references to owned miniobjects instead of borrowed references as it was otherwise possible to create multiple mutable or immutable references to the same object at the same time.
• URIHandler::set_uri does not accept None anymore as this is not allowed by the C function.
• Comparisons and addition of TypeFindProbability and Rank work correctly now
• Various Display implementations were fixed to not cause a stack overflow due to infinite recursion anymore
• Various ::to_string() functions don't take ownership of C strings anymore that they do not own, which caused double frees before

Removed

• MIKEY related bindings from the SDP library. The bindings were broken and until someone needs them these are not available anymore.

0.13.0 - 2019-02-22

Added

• Subclassing infrastructure was moved directly into the bindings, making the gst-plugin crate deprecated. This involves many API changes but generally cleans up code and makes it more flexible. Take a look at the gst-plugins-rs crate for various examples.
• Bindings for GStreamer GL library
• Bindings for CapsFeatures and Meta
• Bindings for ParentBufferMeta, VideoMetaandVideoOverlayCompositionMeta`
• Bindings for VideoOverlayComposition and VideoOverlayRectangle
• Bindings for VideoTimeCode
• Bindings for NetAddressMeta
• Bindings for registering custom tags
• UniqueFlowCombiner and UniqueAdapter wrappers that make use of the Rust compile-time mutability checks and expose more API in a safe way, and as a side-effect implement Sync and Send now
• Bus::add_watch_local() and gst_video::convert_frame_async_local() that allows to use a closure that does not implement Send but can only be called from the thread owning the main context.
• More complete bindings for Allocation Query
• pbutils functions for codec descriptions
• TagList::iter() for iterating over all tags while getting a single value per tag. The old ::iter_tag_list() function was renamed to ::iter_generic() and still provides access to each value for a tag
• Bus::iter() and Bus::iter_timed() iterators around the corresponding ::pop*() functions
• Getters for VideoColorimetry to access its fields
• Debug impls for various missing types.
• serde serialization of Value can also handle Buffer now
• Extensive comments to all examples with explanations
• Transmuxing example showing how to use typefind, multiqueue and dynamic pads
• basic-tutorial-12 was ported and added

Changed

• Rust 1.31 is the minimum supported Rust version now
• Update to latest gir code generator and glib bindings
• Functions returning e.g. gst::FlowReturn or other "combined" enums were changed to return split enums like Result<gst::FlowSuccess, gst::FlowError> to allow usage of the standard Rust error handling.
• Various functions and callbacks returning bool or Option<_> were changed to return a Result<_, glib::BoolError> or Result<_, gst::LoggableError> or Result<_, gst::ErrorMessage> for better integration with Rust's error handling infrastructure.
• Some infallible functions returning bool were changed to return ().
• MiniObject subclasses are now newtype wrappers around the underlying GstRc<FooRef> wrapper. This does not change the API in any breaking way for the current usages, but allows MiniObjects to also be implemented in other crates and makes sure rustdoc places the documentation in the right places.
• BinExt extension trait was renamed to GstBinExt to prevent conflicts with gtk::Bin if both are imported
• Buffer::from_slice() can't possible return None

Fixed

• gst::tag::Album is the album tag now instead of artist sortname
• Return 0 for the channel mask corresponding to negative AudioChannelPositions.
• PartialOrd and related traits are implemented via pointer equality on ClockId instead of using the compare function. Two clock ids with the same timestamp are not necessarily the same.
• Various functions that are actually fallible are now returning an Option<_>.
• Various clippy warnings

0.12.2 - 2018-11-26

Fixed

• PTP clock constructor actually creates a PTP instead of NTP clock

Added

• Bindings for GStreamer Editing Services
• Bindings for GStreamer Check testing library
• Bindings for the encoding profile API (encodebin)
• VideoFrame, VideoInfo, AudioInfo, StructureRef implements Send and Sync now
• VideoFrame has a function to get the raw FFI pointer
• From impls from the Error/Success enums to the combined enums like FlowReturn
• Bin-to-dot file functions were added to the Bin trait
• gst_base::Adapter implements SendUnique now

Changed

• All references were updated from GitHub to freedesktop.org GitLab
• Fix various links in the README.md
• Link to the correct location for the documentation
• Remove GitLab badge as that only works with gitlab.com currently

0.12.1 - 2018-09-21

Added

• More complete bindings for the gst_video::VideoOverlay interface, especially gst_video::is_video_overlay_prepare_window_handle_message()

0.12.0 - 2018-09-08

Added

• Bindings for the GStreamer SDP and WebRTC libraries
• Generic API for working with tags that is based on string tag names and glib::Value for the tag values
• Bindings for Aggregator and AggregatorPad
• Bindings for BaseTransform/BaseSrc::get_buffer_pool()
• Optional serde implementations for the basic GStreamer data flow and metadata types

Changed

• Use ptr::NonNull in various places
• Updated to muldiv 0.2, num-rational 0.2
• Bus::create_watch() can't return None
• Remove CallbackGuard as unwinding across FFI boundaries is not undefined behaviour anymore but will directly cause a panic
• Changed from the futures to the futures-preview crate as an optional dependency
• Various Caps operations take a &CapsRef instead of &Caps
• "deep-notify" signal takes the whole ParamSpec as parameter instead of only the signal name
• Some structs were changed from empty struct to empty enums
• Pad probe code does not take an additional reference to the data anymore, potentially passing writable events/buffers into the probe
• ValueExt::compare() is implemented around std::cmp::Ordering now instead of a custom enum that was basically the same

Fixed

• Pad::add_probe() can return None if an IDLE probe was already called and removed in the meantime
• Various compiler and clippy warnings

Removed

• std::Iterator impl for gst::Iterator. It was awkward to use because the gst::Iterator could fail at each iteration

0.11.6 - 2018-08-27

Fixed

• Build with NLL/two-phase borrows
• Explicitly define [bin] section for discoverer example to fix a cargo warning

Added

• Add unsafe gst::deinit() function
• Ord/PartialOrd impls on gst::Seqnum
• Getter for current pad mode
• gst::Pad::sticky_events_foreach() for iterating over all sticky events in a thread-safe way

0.11.5 - 2018-07-24

Fixed

• gst::Bus's sync handler must unref every message if gst::BusSyncReply::Drop is returned, otherwise they are all leaked

0.11.4 - 2018-07-19

Fixed

• gst::Caps::subtract() does not leak its arguments anymore
• gst::Caps::get_structure() gracefully returns None if the index is out of bounds instead of a g_return_val_if_fail()
• gst::Structure::new() has to give away ownership of the info structure but didn't. For 0.11 we internally copy, in 0.12 it will take the info structure by value
• Typefind tests don't fail anymore if the system has typefind factories without caps

Added

• An additional assertion that ensures that miniobjects are actually writable before creating a mutable reference

0.11.3 - 2018-06-08

Added

• gst::Bus::remove_watch() is now available to remove a bus watch again
• fmt::Debug impls for AudioInfo and VideoInfo were added
• fmt::Debug impls for mini objects also print the pointer value now to make it easier to track them in debug logs
• PlayerVisualization has accessors for the name and description fields now, without which there is no sensible way to use them or to set a player visualization

0.11.2 - 2018-05-09

Fixed

• Work-around various floating reference handling changes between 1.12 and 1.14 to be able to run with both versions without memory leaks or other reference count problems. This affects NetTimeProvider, BufferPool, DeviceMonitor, Stream, StreamCollection, and Player, NetClientClock, NetClock, PtpClock which were already previously fixed.

Changed

• Change the appsrc need-data and all appsink callbacks to not require the Sync bound anymore and change from Fn to FnMut. They can only be called from a single thread at a time. This change is only done for the corresponding callbacks, not the signals.

0.11.1 - 2018-04-07

Fixed

• Fix Structure::to_string() to not run into an infinite recursion but call the method on the contained StructureRef instead of on itself

0.11.0 - 2018-03-20

Changed

• Updated everything to GStreamer 1.14.0
• Event, Message and Query types were refactored to improve usability. Especially newly constructed queries allow to directly use the type-specific functions to be used without first creating a view
• VideoFrameRef::copy_to_ref() and ::copy_plane_to_ref() are gone now and the original functions work with refs instead of full frames
• PadProbeId and NotifyIds are not Copy/Clone anymore and are taken by value
• GstPlayer has GstObject as parent class now

Added

• GstPbutils, GstSdp, GstRtsp and GstRtspServer bindings
• GstPromise, GstAudioStreamAlign and various other 1.14 API
• GstVideoFilter and GstBufferPool bindings
• Element::call_async()
• Debug impl For Toc and TocEntry
• Various new examples (RTP FEC, RTSP server, tag usage, ...)

Fixed

• Memory leak in gst_video::convert_sample_async()

0.10.2 - 2018-02-18

Fixed

• Fix building of messages with custom fields for types that don't have a GstStructure

Added

• VideoFrameRef::copy_to_ref() and ::copy_plane_to_ref(), which work with VideoFrameRefs instead of full VideoFrames
• Getters for the BaseSrc/Sink/Transform configured segment
• Document the gstreamer-player-1.0 dependency in the README.md

0.10.1 - 2018-01-03

Fixed

• Don't require &mut self for TagSetterExtManual::add()

Added

• A TagSetter example application
• Bindings for gst_video::convert_sample() and ::convert_sample_async()
• Bindings for gst_video::VideoRectangle
• Debug impl for Sample and ::with_buffer_list() constructor
• A borrowing version of VideoFrame: VideoFrameRef
• Bindings for GstVideoFilter

Changed

• Deprecated Sample::get_info() in favour of ::get_structure()
• Player has gst::Object as another parent class now

0.10.0 - 2017-12-22

Fixed

• Various clippy warnings
• Memory leak of the tag list in Toc::merge_tags()
• Property getters use Values of the correct type
• Event::get_structure(), Message::get_structure() and Query::get_structure() can return None for the structure
• Various other nullability fixes all over the API, changing functions to accept Option<> or returning Option<>, or only plain types
• Functions taking paths/filenames now actually take Paths instead of &strs
• Element::remove_pad() is not giving away a new reference to the pad anymore, which caused a memory leak of all pads ever removed
• Precision handling in ClockTime's Display impl
• Video/AudioInfo are only Send, not Sync

Added

• Various enums now also derive useful traits like Copy, Clone and Hash in addition to PartialEq, Eq and Debug
• TagList::merge() and insert() for combining tag lists
• EventType gained many useful functions to work with event types and a PartialOrd impl to check expected event order of event types where it matters
• MessageRef/EventRef/QueryRef implement ToOwned
• Bindings for Registry and PluginFeature
• Event::set_running_time_offset() for adjusting the offset while events pass through the pipeline
• Event/Message GroupIds and Seqnums now have a newtype wrapper around u32 instead of the plain value, making usage of them slightly more typesafe. Also add an "invalid" value for both, as exists in latest GStreamer now.
• FormattedValue, GenericFormattedValue and related types were implemented now, which allows more convenient and type-safe usage of formatted values (time, bytes, etc)
• Bindings for force-keyunit and still-frame events were added
• MappedBuffer/BufferMap now implement various other useful traits, including AsRef<[u8]>, AsMut, Deref, DerefMut, Debug, PartialEq and Eq
• Add VideoMultiviewFramePacking enum, and use it in Player
• Bindings for the GStreamer Net library, including PTP/NTP/network client clocks and the GStreamer NetClock provider for network synchronization of pipelines
• IteratorError implements std::error:Error
• Plugin::add_dependency() and ::add_dependency_simple() was added
• Rank and TypeFindProbability implement PartialOrd/Ord now
• Bindings for TypeFind, TypeFindFactory and the typefind helpers
• StreamCollection::iter() for iterating over all contained streams
• ErrorMessage type that can be used e.g. in a Result for passing an error message from somewhere to upper layers to then be posted on an element the same way gst_element_error!() would've done

Changed

• Sample::new(), TagList::add(), Structure::set() and similar functions take the values (ToSendValue impls) by reference instead of value. They were not consumed by the function before.
• The Debug impls of various types, including Event/Buffer/Message/Query/Structure were improved to print all the fields, similar to what GST_PTR_FORMAT would do in C
• Switched to lazy_static 1.0
• Gap event and Duration tag are using ClockTimes now, as well as various Player signals
• Segment is now based on a generic type FormattedSegment that can take any format (time, bytes, etc) or a GenericFormattedValue for more type-safety and convenience. Also functions for "casting" between a generic segment and a segment with a specific format exist on this now
• AppSrc and AppSink now have a builder for the callbacks, making it unnecessary to always provide all callbacks even if only one is actually needed
• Various functions that returned bool for errors, are now returning a Result
• Player configuration is now a custom type with more convenient API
• Player VideoInfo uses a Fraction instead of (u32,u32) for the framerate and pixel-aspect-ratio
• VideoFrame API has more consistent API between writable and read-only variants
• Buffer::copy_into() was added, and ::copy_region() now takes a BufferCopyFlags parameter instead of always using the default flags
• ChildProxy::set_child_property() takes a &ToValue now to follow the API of Object::set_property() and improve usability
• Proxy/GhostPad default pad functions use the correct specific pad type now instead of a generic Pad
• Bus::add_signal_watch_full() takes a Priority for the priority instead of u32
• Clock::(un)adjust_with_calibration() takes no clock parameter anymore

Removed

• FormatValue was removed in favour of GenericFormattedValue and the connected traits and specific format impls

0.9.1 - 2017-11-26

Fixed

• Export FlowError/FlowSuccess, ClockError/ClockSuccess, PadLinkError/PadLinkSuccess too

0.9.0 - 2017-11-26

Added

• Bindings for (outputting to) the GStreamer logging system
• Bindings for the GStreamer base library
• Bindings for all the Pad functions to override pad behaviour, and pad task functions
• Bindings for StaticCaps and StaticPadTemplate
• Bindings for deep-notify signal on Object
• Support for directly creating Error/Warning/Info Messages and posting them from an element with context information (file, line, module, etc.) similar to the C GST_ELEMENT_ERROR macro
• Support for setting custom fields in Messages/Events during construction
• Support for creating Buffers out of anything that is AsRef<[u8]> or AsMut<[u8]>
• Support for using the Read trait on Adapter
• Functions for getting all sink/src/all pads of an Element, and all children of a Bin
• Builder for Caps and Structures in addition to the existing functions
• AppSrc/AppSink implement BaseSrc/BaseSink and URIHandler
• Rust ports of the basic tutorials 1 to 8 from https://gstreamer.freedesktop.org/documentation/tutorials/
• "Getting started" and "Installation" sections to the README.md
• "dox" feature for generating documentation for all available configurations

Fixed

• StackTraceFlags are only available since 1.12
• Worked around macOS requiring a NSRunLoop running on the main thread in all examples and tutorials, to be able to show a window or anything else

Changed

• ClockTime is now a wrapper around Option<u64> to handle the CLOCK_TIME_NONE case better. This wrapper implements all the arithmetic and other traits as needed and ensures that no accidental calculations with CLOCK_TIME_NONE can happen
• "Values with format", like in Duration/Position/Convert queries or Seek events now return a FormatValue type. This contains the actual Format together with the value and does any required conversions. This also makes it harder to accidentally mix e.g. values in bytes and time
• PadProbeId does not implement Clone/Copy anymore
• Property notify watches return a custom type instead of ulong
• Error/Warning/Info Messages can only be created with specific kinds of glib::Error now. Using arbitrary ones does not work
• Iterator bindings were completely rewritten and provide the item type as a generic type parameter now, greatly simplifying its usage
• All glib::Values are now glib::SendValue instead, e.g. in Caps and Structures, as their content must be possible to send to different threads safely
• Message::get_src() can return None
• Allow None as Caps in AppSrc/AppSink
• Allow everything implementing Into<Option<&str>> to be used as a pad name
• Moved copy() from GstRc directly to MiniObject
• Success/Error enums (like FlowReturn, PadLinkReturn, StateChangeReturn) now implement an into_result() function that splits them into a Result with the good and bad cases. Also mark them as #[must_use] to make it harder to accidentally ignore errors.
• Error enums implement the Error trait
• Many examples use the failure crate for error handling now, cleaning up the error handling code quite a bit
• Lots of other code cleanup, compiler/clippy warning cleanup, etc.

0.8.2 - 2017-11-11

Fixed

• Implement StaticType of BufferRef instead of Buffer. Buffer aka GstRc already implements StaticType if BufferRef does, and without this it was not possible to use Buffers in GValues.
• Free memory of the appsink/appsrc callbacks with the correct type. It was crashing because of using the wrong type before.
• Fix documentation URLs in Cargo.toml.

Added

• Installation instructions and links to documentation for getting started to README.md.

0.8.1 - 2017-09-15

Added

• Implement Send+Sync for Query, Message and Event, and their corresponding Ref types.

Fixed

• Constructor for gst_player::Player now works properly with GStreamer 1.12 when passing a video renderer or signal dispatcher. There was a reference counting bug.
• Instead of returning &'static references from functions, return references with a generic, unbound lifetime instead. See https://github.com/rust-lang/rust/pull/42417#issue-233404573
• Various "unused external crate" warnings and clippy warnings everywhere.

Changed

• Remove Cargo.lock from GIT, it's not very useful for library crates.
• Run everything through latest rustfmt-nightly.
• Use while-let (instead of loop and if-let) and CLOCK_TIME_NONE (instead of u64::MAX) in the examples.

0.8.0 - 2017-08-31

• Initial release of the autogenerated GStreamer bindings. Older versions (< 0.8.0) of the bindings can be found here. The API of the two is incompatible.