Struct gstreamer::query::Query

pub struct Query { /* fields omitted */ }

Implementations

impl Query

pub unsafe fn from_glib_none(ptr: *const GstQuery) -> Self

pub unsafe fn from_glib_full(ptr: *const GstQuery) -> Self

pub unsafe fn from_glib_borrow(ptr: *const GstQuery) -> Borrowed<Self>

pub unsafe fn replace_ptr(&mut self, ptr: *mut GstQuery)

pub fn make_mut(&mut self) -> &mut QueryRef

pub fn get_mut(&mut self) -> Option<&mut QueryRef>

pub fn is_writable(&self) -> bool

pub unsafe fn into_ptr(self) -> *mut GstQuery

impl Query

pub fn new_position(fmt: Format) -> Position<Self>

👎 Deprecated since 0.16.0:

use query::Position::new instead

Constructs a new query stream position query object. Use Query::unref when done with it. A position query is used to query the current position of playback in the streams, in some format.

Free-function: Query::unref

format

the default Format for the new query

Returns

a new Query

pub fn new_duration(fmt: Format) -> Duration<Self>

👎 Deprecated since 0.16.0:

use query::Duration::new instead

Constructs a new stream duration query object to query in the given format. Use Query::unref when done with it. A duration query will give the total length of the stream.

Free-function: Query::unref

format

the Format for this duration query

Returns

a new Query

pub fn new_latency() -> Latency<Self>

👎 Deprecated since 0.16.0:

use query::Latency::new instead

Constructs a new latency query object. Use Query::unref when done with it. A latency query is usually performed by sinks to compensate for additional latency introduced by elements in the pipeline.

Free-function: Query::unref

Returns

a Query

pub fn new_seeking(fmt: Format) -> Seeking<Self>

👎 Deprecated since 0.16.0:

use query::Seeking::new instead

Constructs a new query object for querying seeking properties of the stream.

Free-function: Query::unref

format

the default Format for the new query

Returns

a new Query

pub fn new_segment(fmt: Format) -> Segment<Self>

👎 Deprecated since 0.16.0:

use query::Segment::new instead

Constructs a new segment query object. Use Query::unref when done with it. A segment query is used to discover information about the currently configured segment for playback.

Free-function: Query::unref

format

the Format for the new query

Returns

a new Query

pub fn new_convert<V: Into<GenericFormattedValue>>(
    value: V,
    dest_fmt: Format
) -> Convert<Self>

👎 Deprecated since 0.16.0:

use query::Convert::new instead

Constructs a new convert query object. Use Query::unref when done with it. A convert query is used to ask for a conversion between one format and another.

Free-function: Query::unref

src_format

the source Format for the new query

value

the value to convert

dest_format

the target Format

Returns

a Query

pub fn new_formats() -> Formats<Self>

👎 Deprecated since 0.16.0:

use query::Formats::new instead

Constructs a new query object for querying formats of the stream.

Free-function: Query::unref

Returns

a new Query

pub fn new_buffering(fmt: Format) -> Buffering<Self>

👎 Deprecated since 0.16.0:

use query::Buffering::new instead

Constructs a new query object for querying the buffering status of a stream.

Free-function: Query::unref

format

the default Format for the new query

Returns

a new Query

pub fn new_custom(structure: Structure) -> Custom<Self>

👎 Deprecated since 0.16.0:

use query::Custom::new instead

Constructs a new custom query object. Use Query::unref when done with it.

Free-function: Query::unref

type_

the query type

structure

a structure for the query

Returns

a new Query

pub fn new_uri() -> Uri<Self>

👎 Deprecated since 0.16.0:

use query::Uri::new instead

Constructs a new query URI query object. Use Query::unref when done with it. An URI query is used to query the current URI that is used by the source or sink.

Free-function: Query::unref

Returns

a new Query

pub fn new_allocation(caps: &Caps, need_pool: bool) -> Allocation<Self>

👎 Deprecated since 0.16.0:

use query::Allocation::new instead

Constructs a new query object for querying the allocation properties.

Free-function: Query::unref

caps

the negotiated caps

need_pool

return a pool

Returns

a new Query

pub fn new_scheduling() -> Scheduling<Self>

👎 Deprecated since 0.16.0:

use query::Scheduling::new instead

Constructs a new query object for querying the scheduling properties.

Free-function: Query::unref

Returns

a new Query

pub fn new_accept_caps(caps: &Caps) -> AcceptCaps<Self>

👎 Deprecated since 0.16.0:

use query::AcceptCaps::new instead

Constructs a new query object for querying if caps are accepted.

Free-function: Query::unref

caps

a fixed Caps

Returns

a new Query

pub fn new_caps(filter: Option<&Caps>) -> Caps<Self>

👎 Deprecated since 0.16.0:

use query::Caps::new instead

Constructs a new query object for querying the caps.

The CAPS query should return the allowable caps for a pad in the context of the element's state, its link to other elements, and the devices or files it has opened. These caps must be a subset of the pad template caps. In the NULL state with no links, the CAPS query should ideally return the same caps as the pad template. In rare circumstances, an object property can affect the caps returned by the CAPS query, but this is discouraged.

For most filters, the caps returned by CAPS query is directly affected by the allowed caps on other pads. For demuxers and decoders, the caps returned by the srcpad's getcaps function is directly related to the stream data. Again, the CAPS query should return the most specific caps it reasonably can, since this helps with autoplugging.

The filter is used to restrict the result caps, only the caps matching filter should be returned from the CAPS query. Specifying a filter might greatly reduce the amount of processing an element needs to do.

Free-function: Query::unref

filter

a filter

Returns

a new Query

pub fn new_drain() -> Drain<Self>

👎 Deprecated since 0.16.0:

use query::Drain::new instead

Constructs a new query object for querying the drain state.

Free-function: Query::unref

Returns

a new Query

pub fn new_context(context_type: &str) -> Context<Self>

👎 Deprecated since 0.16.0:

use query::Context::new instead

Constructs a new query object for querying the pipeline-local context.

Free-function: Query::unref

context_type

Context type to query

Returns

a new Query

pub fn new_bitrate() -> Bitrate<Self>

👎 Deprecated since 0.16.0:

use query::Bitrate::new instead

Constructs a new query object for querying the bitrate.

Free-function: Query::unref

Feature: v1_16

Returns

a new Query

Methods from Deref<Target = QueryRef>

pub unsafe fn as_ptr(&self) -> *const GstQuery

pub unsafe fn as_mut_ptr(&self) -> *mut GstQuery

pub fn copy(&self) -> Query

pub fn get_structure(&self) -> Option<&StructureRef>

pub fn is_downstream(&self) -> bool

pub fn is_upstream(&self) -> bool

pub fn is_serialized(&self) -> bool

pub fn view(&self) -> QueryView<&Self>

Trait Implementations

impl AsMutPtr for Query

unsafe fn as_mut_ptr(&self) -> *mut GstQuery

impl AsPtr for Query

unsafe fn as_ptr(&self) -> *mut GstQuery

impl AsRef<QueryRef> for Query

fn as_ref(&self) -> &QueryRef

Performs the conversion.

impl Borrow<QueryRef> for Query

fn borrow(&self) -> &QueryRef

Immutably borrows from an owned value.

impl Clone for Query

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Query

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Deref for Query

type Target = QueryRef

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Drop for Query

fn drop(&mut self)

Executes the destructor for this type.

impl From<AcceptCaps<Query>> for Query

fn from(concrete: AcceptCaps<Query>) -> Self

Performs the conversion.

impl From<Allocation<Query>> for Query

fn from(concrete: Allocation<Query>) -> Self

Performs the conversion.

impl From<Bitrate<Query>> for Query

fn from(concrete: Bitrate<Query>) -> Self

Performs the conversion.

impl From<Buffering<Query>> for Query

fn from(concrete: Buffering<Query>) -> Self

Performs the conversion.

impl From<Caps<Query>> for Query

fn from(concrete: Caps<Query>) -> Self

Performs the conversion.

impl From<Context<Query>> for Query

fn from(concrete: Context<Query>) -> Self

Performs the conversion.

impl From<Convert<Query>> for Query

fn from(concrete: Convert<Query>) -> Self

Performs the conversion.

impl From<Custom<Query>> for Query

fn from(concrete: Custom<Query>) -> Self

Performs the conversion.

impl From<Drain<Query>> for Query

fn from(concrete: Drain<Query>) -> Self

Performs the conversion.

impl From<Duration<Query>> for Query

fn from(concrete: Duration<Query>) -> Self

Performs the conversion.

impl From<Formats<Query>> for Query

fn from(concrete: Formats<Query>) -> Self

Performs the conversion.

impl From<Latency<Query>> for Query

fn from(concrete: Latency<Query>) -> Self

Performs the conversion.

impl From<Other<Query>> for Query

fn from(concrete: Other<Query>) -> Self

Performs the conversion.

impl From<Position<Query>> for Query

fn from(concrete: Position<Query>) -> Self

Performs the conversion.

impl From<Scheduling<Query>> for Query

fn from(concrete: Scheduling<Query>) -> Self

Performs the conversion.

impl From<Seeking<Query>> for Query

fn from(concrete: Seeking<Query>) -> Self

Performs the conversion.

impl From<Segment<Query>> for Query

fn from(concrete: Segment<Query>) -> Self

Performs the conversion.

impl From<Uri<Query>> for Query

fn from(concrete: Uri<Query>) -> Self

Performs the conversion.

impl FromGlibContainerAsVec<*mut GstQuery, *const *mut GstQuery> for Query

unsafe fn from_glib_none_num_as_vec(
    ptr: *const *mut GstQuery,
    num: usize
) -> Vec<Self>

unsafe fn from_glib_container_num_as_vec(
    _: *const *mut GstQuery,
    _: usize
) -> Vec<Self>

unsafe fn from_glib_full_num_as_vec(
    _: *const *mut GstQuery,
    _: usize
) -> Vec<Self>

impl FromGlibContainerAsVec<*mut GstQuery, *mut *mut GstQuery> for Query

unsafe fn from_glib_none_num_as_vec(
    ptr: *mut *mut GstQuery,
    num: usize
) -> Vec<Self>

unsafe fn from_glib_container_num_as_vec(
    ptr: *mut *mut GstQuery,
    num: usize
) -> Vec<Self>

unsafe fn from_glib_full_num_as_vec(
    ptr: *mut *mut GstQuery,
    num: usize
) -> Vec<Self>

impl FromGlibPtrArrayContainerAsVec<*mut GstQuery, *const *mut GstQuery> for Query

unsafe fn from_glib_none_as_vec(ptr: *const *mut GstQuery) -> Vec<Self>

unsafe fn from_glib_container_as_vec(_: *const *mut GstQuery) -> Vec<Self>

unsafe fn from_glib_full_as_vec(_: *const *mut GstQuery) -> Vec<Self>

impl FromGlibPtrArrayContainerAsVec<*mut GstQuery, *mut *mut GstQuery> for Query

unsafe fn from_glib_none_as_vec(ptr: *mut *mut GstQuery) -> Vec<Self>

unsafe fn from_glib_container_as_vec(ptr: *mut *mut GstQuery) -> Vec<Self>

unsafe fn from_glib_full_as_vec(ptr: *mut *mut GstQuery) -> Vec<Self>

impl FromGlibPtrBorrow<*const GstQuery> for Query

unsafe fn from_glib_borrow(ptr: *const GstQuery) -> Borrowed<Self>

Safety

impl FromGlibPtrBorrow<*mut GstQuery> for Query

unsafe fn from_glib_borrow(ptr: *mut GstQuery) -> Borrowed<Self>

Safety

impl FromGlibPtrFull<*const GstQuery> for Query

unsafe fn from_glib_full(ptr: *const GstQuery) -> Self

Safety

impl FromGlibPtrFull<*mut GstQuery> for Query

unsafe fn from_glib_full(ptr: *mut GstQuery) -> Self

Safety

impl FromGlibPtrNone<*const GstQuery> for Query

unsafe fn from_glib_none(ptr: *const GstQuery) -> Self

Safety

impl FromGlibPtrNone<*mut GstQuery> for Query

unsafe fn from_glib_none(ptr: *mut GstQuery) -> Self

Safety

impl<'a> FromValueOptional<'a> for Query

unsafe fn from_value_optional(v: &'a Value) -> Option<Self>

Safety

impl GlibPtrDefault for Query

type GlibType = *mut GstQuery

impl Send for Query

impl SetValue for Query

unsafe fn set_value(v: &mut Value, s: &Self)

Safety

impl SetValueOptional for Query

unsafe fn set_value_optional(v: &mut Value, s: Option<&Self>)

Safety

impl StaticType for Query

fn static_type() -> Type

Returns the type identifier of Self.

impl Sync for Query

impl<'a> ToGlibContainerFromSlice<'a, *const *mut GstQuery> for Query

type Storage = (Vec<Stash<'a, *mut GstQuery, Query>>, Option<Vec<*mut GstQuery>>)

fn to_glib_none_from_slice(
    t: &'a [Query]
) -> (*const *mut GstQuery, Self::Storage)

fn to_glib_container_from_slice(
    _: &'a [Query]
) -> (*const *mut GstQuery, Self::Storage)

fn to_glib_full_from_slice(_: &[Query]) -> *const *mut GstQuery

impl<'a> ToGlibContainerFromSlice<'a, *mut *mut GstQuery> for Query

type Storage = (Vec<Stash<'a, *mut GstQuery, Self>>, Option<Vec<*mut GstQuery>>)

fn to_glib_none_from_slice(
    t: &'a [Query]
) -> (*mut *mut GstQuery, Self::Storage)

fn to_glib_container_from_slice(
    t: &'a [Query]
) -> (*mut *mut GstQuery, Self::Storage)

fn to_glib_full_from_slice(t: &[Query]) -> *mut *mut GstQuery

impl<'a> ToGlibPtr<'a, *const GstQuery> for Query

type Storage = &'a Self

fn to_glib_none(&'a self) -> Stash<'a, *const GstQuery, Self>

Transfer: none.

fn to_glib_full(&self) -> *const GstQuery

Transfer: full.

fn to_glib_container(&'a self) -> Stash<'a, P, Self>

Transfer: container.

impl<'a> ToGlibPtr<'a, *mut GstQuery> for Query

type Storage = &'a Self

fn to_glib_none(&'a self) -> Stash<'a, *mut GstQuery, Self>

Transfer: none.

fn to_glib_full(&self) -> *mut GstQuery

Transfer: full.

fn to_glib_container(&'a self) -> Stash<'a, P, Self>

Transfer: container.

impl<'a> ToGlibPtrMut<'a, *mut GstQuery> for Query

type Storage = &'a mut Self

fn to_glib_none_mut(&'a mut self) -> StashMut<'_, *mut GstQuery, Self>

Transfer: none.