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# Changelog
All notable changes to this project will be documented in this file.
The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html),
specifically the [variant used by Rust](http://doc.crates.io/manifest.html#the-version-field).
## [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 accidential 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 accidentially 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
accidentially 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<BufferRef> 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](https://github.com/arturoc/gstreamer1.0-rs).
The API of the two is incompatible.
[Unreleased]: https://github.com/sdroege/gstreamer-rs/compare/0.11.0...HEAD
[0.11.0]: https://github.com/sdroege/gstreamer-rs/compare/0.10.2...0.11.0
[0.10.2]: https://github.com/sdroege/gstreamer-rs/compare/0.10.1...0.10.2
[0.10.1]: https://github.com/sdroege/gstreamer-rs/compare/0.10.0...0.10.1
[0.10.0]: https://github.com/sdroege/gstreamer-rs/compare/0.9.1...0.10.0
[0.9.1]: https://github.com/sdroege/gstreamer-rs/compare/0.9.0...0.9.1
[0.9.0]: https://github.com/sdroege/gstreamer-rs/compare/0.8.1...0.9.0
[0.8.2]: https://github.com/sdroege/gstreamer-rs/compare/0.8.1...0.8.2
[0.8.1]: https://github.com/sdroege/gstreamer-rs/compare/0.8.0...0.8.1

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# gstreamer-pbutils-rs [![crates.io](https://img.shields.io/crates/v/gstreamer.svg)](https://crates.io/crates/gstreamer) [![Build Status](https://travis-ci.org/sdroege/gstreamer-rs.svg?branch=master)](https://travis-ci.org/sdroege/gstreamer-rs)
[GStreamer](https://gstreamer.freedesktop.org/) (Pbutils library) bindings for Rust.
Documentation can be found [here](https://sdroege.github.io/rustdoc/gstreamer/gstreamer/).
These bindings are providing a safe API that can be used to interface with
GStreamer, e.g. for writing GStreamer-based applications.
For background and motivation, see the [announcement blogpost](https://coaxion.net/blog/2017/07/writing-gstreamer-applications-in-rust/).
The bindings (since 0.8.0) are autogenerated with [gir](https://github.com/gtk-rs/gir/)
based on the [GObject-Introspection](https://wiki.gnome.org/Projects/GObjectIntrospection/)
API metadata provided by the GStreamer project. Older versions before 0.8.0 were manually
written and the repository can be found [here](https://github.com/arturoc/gstreamer1.0-rs).
The API of the two is incompatible.
A crate for writing GStreamer plugins in Rust can be found here: https://github.com/sdroege/gst-plugin-rs
## Table of Contents
1. [Installation](#installation)
1. [Linux/BSDs](#installation-linux)
1. [macOS](#installation-macos)
1. [Windows](#installation-windows)
1. [Getting Started](#getting-started)
1. [License](#license)
1. [Contribution](#contribution)
<a name="installation"/>
## Installation
To build the GStreamer bindings or anything depending on them, you need to
have at least GStreamer 1.8 and gst-plugins-base 1.8 installed. In addition,
some of the examples/tutorials require various GStreamer plugins to be
available, which can be found in gst-plugins-base, gst-plugins-good,
gst-plugins-bad, gst-plugins-ugly and/or gst-libav.
<a name="installation-linux"/>
### Linux/BSDs
You need to install the above mentioned packages with your distributions
package manager, or build them from source.
On Debian/Ubuntu they can be installed with
```
$ apt-get install libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev \
gstreamer1.0-plugins-base gstreamer1.0-plugins-good \
gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly \
gstreamer1.0-libav
```
Package names on other distributions should be similar.
Please submit a pull request with instructions for yours.
<a name="installation-macos"/>
### macOS
You can install GStreamer and the plugins via [Homebrew](https://brew.sh/) or
by installing the [binaries](https://gstreamer.freedesktop.org/data/pkg/osx/)
provided by the GStreamer project.
#### Homebrew
```
$ brew install gstreamer gst-plugins-base gst-plugins-good \
gst-plugins-bad gst-plugins-ugly gst-libav
```
#### GStreamer Binaries
You need to download the *two* `.pkg` files from the GStreamer website and
install them, e.g. `gstreamer-1.0-1.12.3-x86_64.pkg` and
`gstreamer-1.0-devel-1.12.3-x86_64.pkg`.
After installation, you also need to install `pkg-config` (e.g. via Homebrew)
and set the `PKG_CONFIG_PATH` environment variable
```
$ export PKG_CONFIG_PATH="/Frameworks/GStreamer.framework/Versions/Current/lib/pkgconfig${PKG_CONFIG_PATH:+:$PKG_CONFIG_PATH}"
```
<a name="installation-windows"/>
### Windows
You can install GStreamer and the plugins via [MSYS2](http://www.msys2.org/)
with `pacman` or by installing the
[binaries](https://gstreamer.freedesktop.org/data/pkg/windows/) provided by
the GStreamer project.
#### MSYS2 / pacman
```
$ pacman -S pkg-config mingw-w64-x86_64-gstreamer mingw-w64-x86_64-gst-plugins-base \
mingw-w64-x86_64-gst-plugins-good mingw-w64-x86_64-gst-plugins-bad \
mingw-w64-x86_64-gst-plugins-ugly mingw-w64-x86_64-gst-libav
```
#### GStreamer Binaries
You need to download the *two* `.msi` files for your platform from the
GStreamer website and install them, e.g. `gstreamer-1.0-x86_64-1.12.3.msi` and
`gstreamer-1.0-devel-x86_64-1.12.3.msi`.
After installation, you also need to install `pkg-config` (e.g. via MSYS2 or
from [here](https://sourceforge.net/projects/pkgconfiglite/))
and set the `PKG_CONFIG_PATH` environment variable
```
$ export PKG_CONFIG_PATH="c:\\gstreamer\\1.0\\x86_64\\lib\\pkgconfig${PKG_CONFIG_PATH:+:$PKG_CONFIG_PATH}"
```
<a name="getting-started"/>
## Getting Started
The API reference can be found
[here](https://sdroege.github.io/rustdoc/gstreamer/gstreamer/), however it is
only the Rust API reference and does not explain any of the concepts.
For getting started with GStreamer development, the best would be to follow
the [documentation](https://gstreamer.freedesktop.org/documentation/) on the
GStreamer website, especially the [Application Development
Manual](https://gstreamer.freedesktop.org/documentation/application-development/).
While being C-centric, it explains all the fundamental concepts of GStreamer
and the code examples should be relatively easily translatable to Rust. The
API is basically the same, function/struct names are the same and everything
is only more convenient (hopefully) and safer.
In addition there are
[tutorials](https://gstreamer.freedesktop.org/documentation/tutorials/) on the
GStreamer website. Many of them were ported to Rust already and the code can
be found in the
[tutorials](https://github.com/sdroege/gstreamer-rs/tree/master/tutorials)
directory.
Some further examples for various aspects of GStreamer and how to use it from
Rust can be found in the
[examples](https://github.com/sdroege/gstreamer-rs/tree/master/examples)
directory.
<a name="license"/>
## LICENSE
gstreamer-rs and all crates contained in here are licensed under either of
* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](LICENSE-MIT) or
http://opensource.org/licenses/MIT)
at your option.
GStreamer itself is licensed under the Lesser General Public License version
2.1 or (at your option) any later version:
https://www.gnu.org/licenses/lgpl-2.1.html
<a name="contribution"/>
## Contribution
Any kinds of contributions are welcome as a pull request.
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in gstreamer-rs by you, as defined in the Apache-2.0 license, shall be
dual licensed as above, without any additional terms or conditions.