- enable is_equal function again (unsure why it was disabled)
- remove restriction-caps property, encoding-profile objects are
immutable
- remove cast need by using IsA<EncodingProfile> in parameters and
returning the correct type of encodingprofile subclass from the build()
functions. It used a internal hack for storing those IsA objects in
order to keep the API clean and ready to be used, this should be sorted
out as soon as we figure out how to store them in the buidlers.
- encodebin example: remove Result error propagation when it is caused
by programming mistakes. A panic will happen in those cases.
- run rustfmt
There's no need to start yet another thread just to push data in this
case, we can simply use the callback and store the frame counter in the
mutable environment of the closure.
Allow instantiating and dereferencing concrete queries. The motivation
for this proposal is to allow the following usability enhancements:
- Concrete queries mutability guaranteed by the borrow checker,
including for generic functions:
``` rust
let mut p = Query::new_position(::Format::Time);
p.get_mut_structure().set("check_mut", &true);
```
- Concrete queries functions available in place:
``` rust
let mut q = gst::Query::new_duration(gst::Format::Time);
let duration = if pipeline.query(&mut q) {
Some(q.get_result())
} else {
None
};
```
FormatValue is now renamed to GenericFormattedValue and the API slightly
changed. In addition there is now a FormattedValue trait, and a
SpecificFormattedValue trait plus types for Bytes, Buffers and the
existing ClockTime.
This allows to create functions like
Pad::query_duration<F: SpecificFormattedValue>() -> Option<F>
and doesn't require the caller to unwrap the generic value anymore,
which is completely unneeded in these cases.
In addition, Segment became FormattedSegment<T> with API to
upcast/downcast between the specific formatted values and the generic
formatted value. This greatly simplifies usage of Segments.
There's now get_result() instead of get(), and separate getters for only
getting the constructor arguments of each query (otherwise query
handlers will get useless values when trying to answer a query).
And also implement a FormatValue type that holds a value together with
its format to make usage of the positions/durations/seek positions/etc
more convenient and safe.
Fixes https://github.com/sdroege/gstreamer-rs/issues/3
