When importing the prelude of a crate like `gst` the `glib` prelude is
provided too. Shedding these imports saves quite a few lines and
adheres to keeping it simple; we're not reexporting base/parent preludes
for no reason :)
As ffi::GstVideoTimeCode implements Copy, assignments don't move it out
of the passed in value but just copy it. This doesn't increase the
reference count of the daily jam, still runs the Drop impl of the passed
in value to decrease the daily jam and then causes a second unref of it
later when the returned value is dropped.
Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/-/issues/310
They can actually be shared with multiple threads at the same time
safely as all functions requiring an immutable reference are
thread-safe.
OTOH TypeFind can't be shared safely between different threads as not
all implementations of the TypeFind struct are thread-safe.
Fixes clippy warnings, prevents confusing errors and is more consistent.
The Display trait provides a to_string() method by itself and FromStr
provides from_str().
There's a VideoTimeCode type that represents any kind of timecodes,
including invalid ones, and which allows to change each field
individually. And ValidVideoTimeCode that has all fields
validated and that can be used with most of the API.
In C, validation of the timecodes is left to the user and most functions
assert on getting passed valid timecodes.