gstreamer-rs/gstreamer/src/query.rs

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2017-07-29 11:58:54 +00:00
// Copyright (C) 2016-2017 Sebastian Dröge <sebastian@centricular.com>
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use ffi;
use miniobject::*;
use structure::*;
use std::ptr;
use std::mem;
use std::ffi::CStr;
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use std::ops::Deref;
use glib;
use glib::translate::{from_glib, from_glib_full, ToGlib, ToGlibPtr};
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#[repr(C)]
pub struct QueryRef(ffi::GstQuery);
unsafe impl Send for QueryRef {}
unsafe impl Sync for QueryRef {}
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pub type Query = GstRc<QueryRef>;
unsafe impl MiniObject for QueryRef {
type GstType = ffi::GstQuery;
}
impl GstRc<QueryRef> {
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pub fn new_position(fmt: ::Format) -> Self {
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assert_initialized_main_thread!();
unsafe { from_glib_full(ffi::gst_query_new_position(fmt.to_glib())) }
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}
pub fn new_duration(fmt: ::Format) -> Self {
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assert_initialized_main_thread!();
unsafe { from_glib_full(ffi::gst_query_new_duration(fmt.to_glib())) }
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}
pub fn new_latency() -> Self {
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assert_initialized_main_thread!();
unsafe { from_glib_full(ffi::gst_query_new_latency()) }
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}
pub fn new_seeking(fmt: ::Format) -> Self {
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assert_initialized_main_thread!();
unsafe { from_glib_full(ffi::gst_query_new_seeking(fmt.to_glib())) }
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}
pub fn new_segment(fmt: ::Format) -> Self {
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assert_initialized_main_thread!();
unsafe { from_glib_full(ffi::gst_query_new_segment(fmt.to_glib())) }
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}
pub fn new_convert(src_fmt: ::Format, value: i64, dest_fmt: ::Format) -> Self {
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assert_initialized_main_thread!();
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unsafe {
from_glib_full(ffi::gst_query_new_convert(
src_fmt.to_glib(),
value,
dest_fmt.to_glib(),
))
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}
}
pub fn new_formats() -> Self {
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assert_initialized_main_thread!();
unsafe { from_glib_full(ffi::gst_query_new_formats()) }
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}
pub fn new_buffering(fmt: ::Format) -> Self {
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assert_initialized_main_thread!();
unsafe { from_glib_full(ffi::gst_query_new_buffering(fmt.to_glib())) }
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}
pub fn new_custom(structure: ::Structure) -> Self {
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assert_initialized_main_thread!();
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unsafe {
from_glib_full(ffi::gst_query_new_custom(
ffi::GST_QUERY_CUSTOM,
structure.into_ptr(),
))
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}
}
pub fn new_uri() -> Self {
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assert_initialized_main_thread!();
unsafe { from_glib_full(ffi::gst_query_new_uri()) }
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}
pub fn new_scheduling() -> Self {
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assert_initialized_main_thread!();
unsafe { from_glib_full(ffi::gst_query_new_scheduling()) }
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}
pub fn new_accept_caps(caps: &::Caps) -> Self {
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assert_initialized_main_thread!();
unsafe { from_glib_full(ffi::gst_query_new_accept_caps(caps.as_mut_ptr())) }
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}
pub fn new_caps(filter: &::Caps) -> Self {
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assert_initialized_main_thread!();
unsafe { from_glib_full(ffi::gst_query_new_caps(filter.as_mut_ptr())) }
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}
pub fn new_drain() -> Self {
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assert_initialized_main_thread!();
unsafe { from_glib_full(ffi::gst_query_new_drain()) }
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}
pub fn new_context(context_type: &str) -> Self {
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assert_initialized_main_thread!();
unsafe { from_glib_full(ffi::gst_query_new_context(context_type.to_glib_none().0)) }
}
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}
impl QueryRef {
pub fn get_structure(&self) -> &StructureRef {
unsafe {
let structure = ffi::gst_query_get_structure(self.as_mut_ptr());
StructureRef::from_glib_borrow(structure)
}
}
pub fn get_mut_structure(&mut self) -> &mut StructureRef {
unsafe {
let structure = ffi::gst_query_writable_structure(self.as_mut_ptr());
StructureRef::from_glib_borrow_mut(structure)
}
}
pub fn is_downstream(&self) -> bool {
unsafe { ((*self.as_ptr()).type_ as u32) & (ffi::GST_QUERY_TYPE_DOWNSTREAM.bits()) != 0 }
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}
pub fn is_upstream(&self) -> bool {
unsafe { ((*self.as_ptr()).type_ as u32) & (ffi::GST_QUERY_TYPE_UPSTREAM.bits()) != 0 }
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}
pub fn is_serialized(&self) -> bool {
unsafe { ((*self.as_ptr()).type_ as u32) & (ffi::GST_QUERY_TYPE_SERIALIZED.bits()) != 0 }
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}
pub fn view(&self) -> QueryView<&Self> {
let type_ = unsafe { (*self.as_ptr()).type_ };
match type_ {
ffi::GST_QUERY_POSITION => QueryView::Position(Position(self)),
ffi::GST_QUERY_DURATION => QueryView::Duration(Duration(self)),
ffi::GST_QUERY_LATENCY => QueryView::Latency(Latency(self)),
ffi::GST_QUERY_JITTER => QueryView::Jitter(Jitter(self)),
ffi::GST_QUERY_RATE => QueryView::Rate(Rate(self)),
ffi::GST_QUERY_SEEKING => QueryView::Seeking(Seeking(self)),
ffi::GST_QUERY_SEGMENT => QueryView::Segment(Segment(self)),
ffi::GST_QUERY_CONVERT => QueryView::Convert(Convert(self)),
ffi::GST_QUERY_FORMATS => QueryView::Formats(Formats(self)),
ffi::GST_QUERY_BUFFERING => QueryView::Buffering(Buffering(self)),
ffi::GST_QUERY_CUSTOM => QueryView::Custom(Custom(self)),
ffi::GST_QUERY_URI => QueryView::Uri(Uri(self)),
ffi::GST_QUERY_ALLOCATION => QueryView::Allocation(Allocation(self)),
ffi::GST_QUERY_SCHEDULING => QueryView::Scheduling(Scheduling(self)),
ffi::GST_QUERY_ACCEPT_CAPS => QueryView::AcceptCaps(AcceptCaps(self)),
ffi::GST_QUERY_CAPS => QueryView::Caps(Caps(self)),
ffi::GST_QUERY_DRAIN => QueryView::Drain(Drain(self)),
ffi::GST_QUERY_CONTEXT => QueryView::Context(Context(self)),
_ => QueryView::Other(Other(self)),
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}
}
pub fn view_mut(&mut self) -> QueryView<&mut Self> {
unsafe { mem::transmute(self.view()) }
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}
}
impl glib::types::StaticType for QueryRef {
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fn static_type() -> glib::types::Type {
unsafe { from_glib(ffi::gst_query_get_type()) }
}
}
pub enum QueryView<T> {
Position(Position<T>),
Duration(Duration<T>),
Latency(Latency<T>),
Jitter(Jitter<T>),
Rate(Rate<T>),
Seeking(Seeking<T>),
Segment(Segment<T>),
Convert(Convert<T>),
Formats(Formats<T>),
Buffering(Buffering<T>),
Custom(Custom<T>),
Uri(Uri<T>),
Allocation(Allocation<T>),
Scheduling(Scheduling<T>),
AcceptCaps(AcceptCaps<T>),
Caps(Caps<T>),
Drain(Drain<T>),
Context(Context<T>),
Other(Other<T>),
__NonExhaustive,
}
pub struct Position<T>(T);
impl<'a> Position<&'a QueryRef> {
pub fn get(&self) -> (::Format, i64) {
unsafe {
let mut fmt = mem::uninitialized();
let mut pos = mem::uninitialized();
ffi::gst_query_parse_position(self.0.as_mut_ptr(), &mut fmt, &mut pos);
(from_glib(fmt), pos)
}
}
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Position<&'a mut QueryRef> {
pub fn set(&mut self, fmt: ::Format, pos: i64) {
unsafe {
ffi::gst_query_set_position(self.0.as_mut_ptr(), fmt.to_glib(), pos);
}
}
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
pub struct Duration<T>(T);
impl<'a> Duration<&'a QueryRef> {
pub fn get(&self) -> (::Format, i64) {
unsafe {
let mut fmt = mem::uninitialized();
let mut pos = mem::uninitialized();
ffi::gst_query_parse_duration(self.0.as_mut_ptr(), &mut fmt, &mut pos);
(from_glib(fmt), pos)
}
}
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Duration<&'a mut QueryRef> {
pub fn set(&mut self, fmt: ::Format, pos: i64) {
unsafe {
ffi::gst_query_set_duration(self.0.as_mut_ptr(), fmt.to_glib(), pos);
}
}
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
pub struct Latency<T>(T);
impl<'a> Latency<&'a QueryRef> {
pub fn get(&self) -> (bool, u64, u64) {
unsafe {
let mut live = mem::uninitialized();
let mut min = mem::uninitialized();
let mut max = mem::uninitialized();
ffi::gst_query_parse_latency(self.0.as_mut_ptr(), &mut live, &mut min, &mut max);
(from_glib(live), min, max)
}
}
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Latency<&'a mut QueryRef> {
pub fn set(&mut self, live: bool, min: u64, max: u64) {
unsafe {
ffi::gst_query_set_latency(self.0.as_mut_ptr(), live.to_glib(), min, max);
}
}
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
pub struct Jitter<T>(T);
impl<'a> Jitter<&'a QueryRef> {
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Jitter<&'a mut QueryRef> {
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
pub struct Rate<T>(T);
impl<'a> Rate<&'a QueryRef> {
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Rate<&'a mut QueryRef> {
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
pub struct Seeking<T>(T);
impl<'a> Seeking<&'a QueryRef> {
pub fn get(&self) -> (::Format, bool, i64, i64) {
unsafe {
let mut fmt = mem::uninitialized();
let mut seekable = mem::uninitialized();
let mut start = mem::uninitialized();
let mut end = mem::uninitialized();
ffi::gst_query_parse_seeking(
self.0.as_mut_ptr(),
&mut fmt,
&mut seekable,
&mut start,
&mut end,
);
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(from_glib(fmt), from_glib(seekable), start, end)
}
}
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Seeking<&'a mut QueryRef> {
pub fn set(&mut self, fmt: ::Format, seekable: bool, start: i64, end: i64) {
unsafe {
ffi::gst_query_set_seeking(
self.0.as_mut_ptr(),
fmt.to_glib(),
seekable.to_glib(),
start,
end,
);
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}
}
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
pub struct Segment<T>(T);
impl<'a> Segment<&'a QueryRef> {
pub fn get(&self) -> (f64, ::Format, i64, i64) {
unsafe {
let mut rate = mem::uninitialized();
let mut fmt = mem::uninitialized();
let mut start = mem::uninitialized();
let mut stop = mem::uninitialized();
ffi::gst_query_parse_segment(
self.0.as_mut_ptr(),
&mut rate,
&mut fmt,
&mut start,
&mut stop,
);
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(rate, from_glib(fmt), start, stop)
}
}
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Segment<&'a mut QueryRef> {
pub fn set(&mut self, rate: f64, fmt: ::Format, start: i64, stop: i64) {
unsafe {
ffi::gst_query_set_segment(self.0.as_mut_ptr(), rate, fmt.to_glib(), start, stop);
}
}
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
pub struct Convert<T>(T);
impl<'a> Convert<&'a QueryRef> {
pub fn get(&self) -> (::Format, i64, ::Format, i64) {
unsafe {
let mut src_fmt = mem::uninitialized();
let mut src = mem::uninitialized();
let mut dest_fmt = mem::uninitialized();
let mut dest = mem::uninitialized();
ffi::gst_query_parse_convert(
self.0.as_mut_ptr(),
&mut src_fmt,
&mut src,
&mut dest_fmt,
&mut dest,
);
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(from_glib(src_fmt), src, from_glib(dest_fmt), dest)
}
}
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Convert<&'a mut QueryRef> {
pub fn set(&mut self, src_fmt: ::Format, src: i64, dest_fmt: ::Format, dest: i64) {
unsafe {
ffi::gst_query_set_convert(
self.0.as_mut_ptr(),
src_fmt.to_glib(),
src,
dest_fmt.to_glib(),
dest,
);
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}
}
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
pub struct Formats<T>(T);
impl<'a> Formats<&'a QueryRef> {
pub fn get(&self) -> Vec<::Format> {
unsafe {
let mut n = mem::uninitialized();
ffi::gst_query_parse_n_formats(self.0.as_mut_ptr(), &mut n);
let mut res = Vec::with_capacity(n as usize);
for i in 0..n {
let mut fmt = mem::uninitialized();
ffi::gst_query_parse_nth_format(self.0.as_mut_ptr(), i, &mut fmt);
res.push(from_glib(fmt));
}
res
}
}
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Formats<&'a mut QueryRef> {
pub fn set(&mut self, formats: &[::Format]) {
unsafe {
let v: Vec<_> = formats.iter().map(|f| f.to_glib()).collect();
ffi::gst_query_set_formatsv(self.0.as_mut_ptr(), v.len() as i32, v.as_ptr() as *mut _);
}
}
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
pub struct Buffering<T>(T);
impl<'a> Buffering<&'a QueryRef> {
pub fn get_percent(&self) -> (bool, i32) {
unsafe {
let mut busy = mem::uninitialized();
let mut percent = mem::uninitialized();
ffi::gst_query_parse_buffering_percent(self.0.as_mut_ptr(), &mut busy, &mut percent);
(from_glib(busy), percent)
}
}
pub fn get_range(&self) -> (::Format, i64, i64, i64) {
unsafe {
let mut fmt = mem::uninitialized();
let mut start = mem::uninitialized();
let mut stop = mem::uninitialized();
let mut estimated_total = mem::uninitialized();
ffi::gst_query_parse_buffering_range(
self.0.as_mut_ptr(),
&mut fmt,
&mut start,
&mut stop,
&mut estimated_total,
);
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(from_glib(fmt), start, stop, estimated_total)
}
}
pub fn get_stats(&self) -> (::BufferingMode, i32, i32, i64) {
unsafe {
let mut mode = mem::uninitialized();
let mut avg_in = mem::uninitialized();
let mut avg_out = mem::uninitialized();
let mut buffering_left = mem::uninitialized();
ffi::gst_query_parse_buffering_stats(
self.0.as_mut_ptr(),
&mut mode,
&mut avg_in,
&mut avg_out,
&mut buffering_left,
);
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(from_glib(mode), avg_in, avg_out, buffering_left)
}
}
pub fn get_ranges(&self) -> Vec<(i64, i64)> {
unsafe {
let n = ffi::gst_query_get_n_buffering_ranges(self.0.as_mut_ptr());
let mut res = Vec::with_capacity(n as usize);
for i in 0..n {
let mut start = mem::uninitialized();
let mut stop = mem::uninitialized();
let s: bool = from_glib(ffi::gst_query_parse_nth_buffering_range(
self.0.as_mut_ptr(),
i,
&mut start,
&mut stop,
));
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if s {
res.push((start, stop));
}
}
res
}
}
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Buffering<&'a mut QueryRef> {
pub fn set_percent(&mut self, busy: bool, percent: i32) {
unsafe {
ffi::gst_query_set_buffering_percent(self.0.as_mut_ptr(), busy.to_glib(), percent);
}
}
pub fn set_range(&mut self, fmt: ::Format, start: i64, stop: i64, estimated_total: i64) {
unsafe {
ffi::gst_query_set_buffering_range(
self.0.as_mut_ptr(),
fmt.to_glib(),
start,
stop,
estimated_total,
);
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}
}
pub fn set_stats(
&mut self,
mode: ::BufferingMode,
avg_in: i32,
avg_out: i32,
buffering_left: i64,
) {
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skip_assert_initialized!();
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unsafe {
ffi::gst_query_set_buffering_stats(
self.0.as_mut_ptr(),
mode.to_glib(),
avg_in,
avg_out,
buffering_left,
);
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}
}
pub fn add_buffering_ranges(&mut self, ranges: &[(i64, i64)]) {
unsafe {
for &(start, stop) in ranges {
ffi::gst_query_add_buffering_range(self.0.as_mut_ptr(), start, stop);
}
}
}
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
pub struct Custom<T>(T);
impl<'a> Custom<&'a QueryRef> {
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Custom<&'a mut QueryRef> {
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
pub struct Uri<T>(T);
impl<'a> Uri<&'a QueryRef> {
pub fn get_uri(&self) -> Option<String> {
unsafe {
let mut uri = ptr::null_mut();
ffi::gst_query_parse_uri(self.0.as_mut_ptr(), &mut uri);
from_glib_full(uri)
}
}
pub fn get_redirection(&self) -> (Option<String>, bool) {
unsafe {
let mut uri = ptr::null_mut();
ffi::gst_query_parse_uri_redirection(self.0.as_mut_ptr(), &mut uri);
let mut permanent = mem::uninitialized();
ffi::gst_query_parse_uri_redirection_permanent(self.0.as_mut_ptr(), &mut permanent);
(from_glib_full(uri), from_glib(permanent))
}
}
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Uri<&'a mut QueryRef> {
pub fn set_uri<'b, T: Into<&'b str>>(&mut self, uri: T) {
let uri = uri.into();
unsafe {
ffi::gst_query_set_uri(self.0.as_mut_ptr(), uri.to_glib_none().0);
}
}
pub fn set_redirection<'b, T: Into<&'b str>>(&mut self, uri: T, permanent: bool) {
let uri = uri.into();
unsafe {
ffi::gst_query_set_uri_redirection(self.0.as_mut_ptr(), uri.to_glib_none().0);
ffi::gst_query_set_uri_redirection_permanent(self.0.as_mut_ptr(), permanent.to_glib());
}
}
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
// TODO
pub struct Allocation<T>(T);
impl<'a> Allocation<&'a QueryRef> {
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Allocation<&'a mut QueryRef> {
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
pub struct Scheduling<T>(T);
impl<'a> Scheduling<&'a QueryRef> {
pub fn has_scheduling_mode(&self, mode: ::PadMode) -> bool {
unsafe {
from_glib(ffi::gst_query_has_scheduling_mode(
self.0.as_mut_ptr(),
mode.to_glib(),
))
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}
}
pub fn has_scheduling_mode_with_flags(
&self,
mode: ::PadMode,
flags: ::SchedulingFlags,
) -> bool {
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skip_assert_initialized!();
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unsafe {
from_glib(ffi::gst_query_has_scheduling_mode_with_flags(
self.0.as_mut_ptr(),
mode.to_glib(),
flags.to_glib(),
))
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}
}
pub fn get_scheduling_modes(&self) -> Vec<::PadMode> {
unsafe {
let n = ffi::gst_query_get_n_scheduling_modes(self.0.as_mut_ptr());
let mut res = Vec::with_capacity(n as usize);
for i in 0..n {
res.push(from_glib(ffi::gst_query_parse_nth_scheduling_mode(
self.0.as_mut_ptr(),
i,
)));
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}
res
}
}
pub fn get(&self) -> (::SchedulingFlags, i32, i32, i32) {
unsafe {
let mut flags = mem::uninitialized();
let mut minsize = mem::uninitialized();
let mut maxsize = mem::uninitialized();
let mut align = mem::uninitialized();
ffi::gst_query_parse_scheduling(
self.0.as_mut_ptr(),
&mut flags,
&mut minsize,
&mut maxsize,
&mut align,
);
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(from_glib(flags), minsize, maxsize, align)
}
}
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Scheduling<&'a mut QueryRef> {
pub fn add_scheduling_modes(&mut self, modes: &[::PadMode]) {
unsafe {
for mode in modes {
ffi::gst_query_add_scheduling_mode(self.0.as_mut_ptr(), mode.to_glib());
}
}
}
pub fn set(&mut self, flags: ::SchedulingFlags, minsize: i32, maxsize: i32, align: i32) {
unsafe {
ffi::gst_query_set_scheduling(
self.0.as_mut_ptr(),
flags.to_glib(),
minsize,
maxsize,
align,
);
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}
}
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
pub struct AcceptCaps<T>(T);
impl<'a> AcceptCaps<&'a QueryRef> {
pub fn get(&self) -> &::CapsRef {
unsafe {
let mut caps = ptr::null_mut();
ffi::gst_query_parse_accept_caps(self.0.as_mut_ptr(), &mut caps);
::CapsRef::from_ptr(caps)
}
}
pub fn get_result(&self) -> bool {
unsafe {
let mut accepted = mem::uninitialized();
ffi::gst_query_parse_accept_caps_result(self.0.as_mut_ptr(), &mut accepted);
from_glib(accepted)
}
}
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> AcceptCaps<&'a mut QueryRef> {
pub fn set_result(&mut self, accepted: bool) {
unsafe {
ffi::gst_query_set_accept_caps_result(self.0.as_mut_ptr(), accepted.to_glib());
}
}
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
pub struct Caps<T>(T);
impl<'a> Caps<&'a QueryRef> {
pub fn get_filter(&self) -> &::CapsRef {
unsafe {
let mut caps = ptr::null_mut();
ffi::gst_query_parse_caps(self.0.as_mut_ptr(), &mut caps);
::CapsRef::from_ptr(caps)
}
}
pub fn get_result(&self) -> &::CapsRef {
unsafe {
let mut caps = ptr::null_mut();
ffi::gst_query_parse_caps_result(self.0.as_mut_ptr(), &mut caps);
::CapsRef::from_ptr(caps)
}
}
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Caps<&'a mut QueryRef> {
pub fn set_result(&mut self, caps: &::Caps) {
unsafe {
ffi::gst_query_set_caps_result(self.0.as_mut_ptr(), caps.as_mut_ptr());
}
}
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
pub struct Drain<T>(T);
impl<'a> Drain<&'a QueryRef> {
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Drain<&'a mut QueryRef> {
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
pub struct Context<T>(T);
impl<'a> Context<&'a QueryRef> {
pub fn get_context(&self) -> Option<&::ContextRef> {
unsafe {
let mut context = ptr::null_mut();
ffi::gst_query_parse_context(self.0.as_mut_ptr(), &mut context);
if context.is_null() {
None
} else {
Some(::ContextRef::from_ptr(context))
}
}
}
pub fn get_context_type(&self) -> &str {
unsafe {
let mut context_type = ptr::null();
ffi::gst_query_parse_context_type(self.0.as_mut_ptr(), &mut context_type);
CStr::from_ptr(context_type).to_str().unwrap()
}
}
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pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Context<&'a mut QueryRef> {
pub fn set_context(&mut self, context: &::Context) {
unsafe {
ffi::gst_query_set_context(self.0.as_mut_ptr(), context.as_mut_ptr());
}
}
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pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
pub struct Other<T>(T);
impl<'a> Other<&'a QueryRef> {
pub fn get_query(&self) -> &QueryRef {
self.0
}
}
impl<'a> Other<&'a mut QueryRef> {
pub fn get_mut_query(&mut self) -> &mut QueryRef {
self.0
}
}
macro_rules! impl_deref_view(
($name:ident) => {
impl<'a> Deref for $name<&'a mut QueryRef> {
type Target = $name<&'a QueryRef>;
fn deref(&self) -> &Self::Target {
unsafe {
mem::transmute(self)
}
}
}
};
);
impl_deref_view!(Position);
impl_deref_view!(Duration);
impl_deref_view!(Latency);
impl_deref_view!(Jitter);
impl_deref_view!(Rate);
impl_deref_view!(Seeking);
impl_deref_view!(Segment);
impl_deref_view!(Convert);
impl_deref_view!(Formats);
impl_deref_view!(Buffering);
impl_deref_view!(Custom);
impl_deref_view!(Uri);
impl_deref_view!(Allocation);
impl_deref_view!(Scheduling);
impl_deref_view!(AcceptCaps);
impl_deref_view!(Caps);
impl_deref_view!(Drain);
impl_deref_view!(Context);
impl_deref_view!(Other);
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_writability() {
::init().unwrap();
let mut q = Query::new_position(::Format::Time);
match q.view() {
QueryView::Position(ref p) => {
let (fmt, pos) = p.get();
assert_eq!(fmt, ::Format::Time);
assert_eq!(pos, -1);
}
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_ => (),
}
match q.get_mut().unwrap().view_mut() {
QueryView::Position(ref mut p) => {
let (fmt, pos) = p.get();
assert_eq!(fmt, ::Format::Time);
assert_eq!(pos, -1);
p.set(::Format::Time, 2);
}
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_ => (),
}
match q.view() {
QueryView::Position(ref p) => {
let (fmt, pos) = p.get();
assert_eq!(fmt, ::Format::Time);
assert_eq!(pos, 2);
}
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_ => (),
}
}
}