mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-09-26 14:00:12 +00:00
959 lines
32 KiB
Rust
959 lines
32 KiB
Rust
// Copyright (C) 2018 Sebastian Dröge <sebastian@centricular.com>
|
|
//
|
|
// This library is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU Library General Public
|
|
// License as published by the Free Software Foundation; either
|
|
// version 2 of the License, or (at your option) any later version.
|
|
//
|
|
// This library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
// Library General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Library General Public
|
|
// License along with this library; if not, write to the
|
|
// Free Software Foundation, Inc., 51 Franklin Street, Suite 500,
|
|
// Boston, MA 02110-1335, USA.
|
|
|
|
use glib;
|
|
use glib::prelude::*;
|
|
use glib::subclass;
|
|
use glib::subclass::prelude::*;
|
|
use gst;
|
|
use gst::prelude::*;
|
|
use gst::subclass::prelude::*;
|
|
|
|
use std::collections::VecDeque;
|
|
use std::sync::Mutex;
|
|
use std::{u32, u64};
|
|
|
|
use futures;
|
|
use futures::future;
|
|
use futures::task;
|
|
use futures::{Async, Future};
|
|
|
|
use tokio::executor;
|
|
|
|
use dataqueue::*;
|
|
use iocontext::*;
|
|
|
|
const DEFAULT_MAX_SIZE_BUFFERS: u32 = 200;
|
|
const DEFAULT_MAX_SIZE_BYTES: u32 = 1024 * 1024;
|
|
const DEFAULT_MAX_SIZE_TIME: u64 = gst::SECOND_VAL;
|
|
const DEFAULT_CONTEXT: &'static str = "";
|
|
const DEFAULT_CONTEXT_WAIT: u32 = 0;
|
|
|
|
#[derive(Debug, Clone)]
|
|
struct Settings {
|
|
max_size_buffers: u32,
|
|
max_size_bytes: u32,
|
|
max_size_time: u64,
|
|
context: String,
|
|
context_wait: u32,
|
|
}
|
|
|
|
impl Default for Settings {
|
|
fn default() -> Self {
|
|
Settings {
|
|
max_size_buffers: DEFAULT_MAX_SIZE_BUFFERS,
|
|
max_size_bytes: DEFAULT_MAX_SIZE_BYTES,
|
|
max_size_time: DEFAULT_MAX_SIZE_TIME,
|
|
context: DEFAULT_CONTEXT.into(),
|
|
context_wait: DEFAULT_CONTEXT_WAIT,
|
|
}
|
|
}
|
|
}
|
|
|
|
static PROPERTIES: [subclass::Property; 5] = [
|
|
subclass::Property("max-size-buffers", |name| {
|
|
glib::ParamSpec::uint(
|
|
name,
|
|
"Max Size Buffers",
|
|
"Maximum number of buffers to queue (0=unlimited)",
|
|
0,
|
|
u32::MAX,
|
|
DEFAULT_MAX_SIZE_BUFFERS,
|
|
glib::ParamFlags::READWRITE,
|
|
)
|
|
}),
|
|
subclass::Property("max-size-bytes", |name| {
|
|
glib::ParamSpec::uint(
|
|
name,
|
|
"Max Size Bytes",
|
|
"Maximum number of bytes to queue (0=unlimited)",
|
|
0,
|
|
u32::MAX,
|
|
DEFAULT_MAX_SIZE_BYTES,
|
|
glib::ParamFlags::READWRITE,
|
|
)
|
|
}),
|
|
subclass::Property("max-size-time", |name| {
|
|
glib::ParamSpec::uint64(
|
|
name,
|
|
"Max Size Time",
|
|
"Maximum number of nanoseconds to queue (0=unlimited)",
|
|
0,
|
|
u64::MAX - 1,
|
|
DEFAULT_MAX_SIZE_TIME,
|
|
glib::ParamFlags::READWRITE,
|
|
)
|
|
}),
|
|
subclass::Property("context", |name| {
|
|
glib::ParamSpec::string(
|
|
name,
|
|
"Context",
|
|
"Context name to share threads with",
|
|
Some(DEFAULT_CONTEXT),
|
|
glib::ParamFlags::READWRITE,
|
|
)
|
|
}),
|
|
subclass::Property("context-wait", |name| {
|
|
glib::ParamSpec::uint(
|
|
name,
|
|
"Context Wait",
|
|
"Throttle poll loop to run at most once every this many ms",
|
|
0,
|
|
1000,
|
|
DEFAULT_CONTEXT_WAIT,
|
|
glib::ParamFlags::READWRITE,
|
|
)
|
|
}),
|
|
];
|
|
|
|
struct State {
|
|
io_context: Option<IOContext>,
|
|
pending_future_id: Option<PendingFutureId>,
|
|
io_context_in: Option<IOContext>,
|
|
pending_future_id_in: Option<PendingFutureId>,
|
|
queue: Option<DataQueue>,
|
|
pending_queue: Option<(Option<task::Task>, bool, VecDeque<DataQueueItem>)>,
|
|
last_res: Result<gst::FlowSuccess, gst::FlowError>,
|
|
pending_future_cancel: Option<futures::sync::oneshot::Sender<()>>,
|
|
}
|
|
|
|
impl Default for State {
|
|
fn default() -> State {
|
|
State {
|
|
io_context: None,
|
|
pending_future_id: None,
|
|
io_context_in: None,
|
|
pending_future_id_in: None,
|
|
queue: None,
|
|
pending_queue: None,
|
|
last_res: Ok(gst::FlowSuccess::Ok),
|
|
pending_future_cancel: None,
|
|
}
|
|
}
|
|
}
|
|
|
|
struct Queue {
|
|
cat: gst::DebugCategory,
|
|
sink_pad: gst::Pad,
|
|
src_pad: gst::Pad,
|
|
state: Mutex<State>,
|
|
settings: Mutex<Settings>,
|
|
}
|
|
|
|
impl Queue {
|
|
fn create_io_context_event(state: &State) -> Option<gst::Event> {
|
|
if let (&Some(ref pending_future_id), &Some(ref io_context)) =
|
|
(&state.pending_future_id, &state.io_context)
|
|
{
|
|
let s = gst::Structure::new(
|
|
"ts-io-context",
|
|
&[
|
|
("io-context", &io_context),
|
|
("pending-future-id", &*pending_future_id),
|
|
],
|
|
);
|
|
Some(gst::Event::new_custom_downstream_sticky(s).build())
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
|
|
fn enqueue_item(
|
|
&self,
|
|
_pad: &gst::Pad,
|
|
element: &gst::Element,
|
|
item: DataQueueItem,
|
|
) -> Result<gst::FlowSuccess, gst::FlowError> {
|
|
let wait_future = {
|
|
let mut state = self.state.lock().unwrap();
|
|
let State {
|
|
ref queue,
|
|
ref mut pending_queue,
|
|
ref io_context_in,
|
|
pending_future_id_in,
|
|
..
|
|
} = *state;
|
|
|
|
let queue = queue.as_ref().ok_or(gst::FlowError::Error)?;
|
|
|
|
let item = match pending_queue {
|
|
None => queue.push(item),
|
|
Some((_, false, ref mut items)) => {
|
|
let mut failed_item = None;
|
|
while let Some(item) = items.pop_front() {
|
|
if let Err(item) = queue.push(item) {
|
|
failed_item = Some(item);
|
|
}
|
|
}
|
|
|
|
if let Some(failed_item) = failed_item {
|
|
items.push_front(failed_item);
|
|
|
|
Err(item)
|
|
} else {
|
|
queue.push(item)
|
|
}
|
|
}
|
|
_ => Err(item),
|
|
};
|
|
|
|
if let Err(item) = item {
|
|
if pending_queue
|
|
.as_ref()
|
|
.map(|(_, scheduled, _)| !scheduled)
|
|
.unwrap_or(true)
|
|
{
|
|
if pending_queue.is_none() {
|
|
*pending_queue = Some((None, false, VecDeque::new()));
|
|
}
|
|
|
|
let schedule_now = match item {
|
|
DataQueueItem::Event(ref ev) if ev.get_type() != gst::EventType::Eos => {
|
|
false
|
|
}
|
|
_ => true,
|
|
};
|
|
|
|
pending_queue.as_mut().unwrap().2.push_back(item);
|
|
|
|
gst_log!(
|
|
self.cat,
|
|
obj: element,
|
|
"Queue is full - Pushing first item on pending queue"
|
|
);
|
|
|
|
if schedule_now {
|
|
gst_log!(self.cat, obj: element, "Scheduling pending queue now");
|
|
|
|
pending_queue.as_mut().unwrap().1 = true;
|
|
|
|
let element_clone = element.clone();
|
|
let future = future::poll_fn(move || {
|
|
let queue = Self::from_instance(&element_clone);
|
|
let mut state = queue.state.lock().unwrap();
|
|
|
|
let State {
|
|
queue: ref dq,
|
|
ref mut pending_queue,
|
|
..
|
|
} = *state;
|
|
|
|
if dq.is_none() {
|
|
return Ok(Async::Ready(()));
|
|
}
|
|
|
|
gst_log!(
|
|
queue.cat,
|
|
obj: &element_clone,
|
|
"Trying to empty pending queue"
|
|
);
|
|
let res = if let Some((ref mut task, _, ref mut items)) = *pending_queue
|
|
{
|
|
let mut failed_item = None;
|
|
while let Some(item) = items.pop_front() {
|
|
if let Err(item) = dq.as_ref().unwrap().push(item) {
|
|
failed_item = Some(item);
|
|
}
|
|
}
|
|
|
|
if let Some(failed_item) = failed_item {
|
|
items.push_front(failed_item);
|
|
*task = Some(task::current());
|
|
gst_log!(
|
|
queue.cat,
|
|
obj: &element_clone,
|
|
"Waiting for more queue space"
|
|
);
|
|
Ok(Async::NotReady)
|
|
} else {
|
|
gst_log!(
|
|
queue.cat,
|
|
obj: &element_clone,
|
|
"Pending queue is empty now"
|
|
);
|
|
Ok(Async::Ready(()))
|
|
}
|
|
} else {
|
|
gst_log!(
|
|
queue.cat,
|
|
obj: &element_clone,
|
|
"Flushing, dropping pending queue"
|
|
);
|
|
Ok(Async::Ready(()))
|
|
};
|
|
|
|
if res == Ok(Async::Ready(())) {
|
|
*pending_queue = None;
|
|
}
|
|
|
|
res
|
|
});
|
|
|
|
if let (Some(io_context_in), Some(pending_future_id_in)) =
|
|
(io_context_in.as_ref(), pending_future_id_in.as_ref())
|
|
{
|
|
io_context_in.add_pending_future(*pending_future_id_in, future);
|
|
None
|
|
} else {
|
|
Some(future)
|
|
}
|
|
} else {
|
|
gst_log!(self.cat, obj: element, "Scheduling pending queue later");
|
|
|
|
None
|
|
}
|
|
} else {
|
|
assert!(io_context_in.is_some());
|
|
pending_queue.as_mut().unwrap().2.push_back(item);
|
|
|
|
None
|
|
}
|
|
} else {
|
|
None
|
|
}
|
|
};
|
|
|
|
if let Some(wait_future) = wait_future {
|
|
gst_log!(self.cat, obj: element, "Blocking until queue becomes empty");
|
|
executor::current_thread::block_on_all(wait_future).map_err(|_| {
|
|
gst_element_error!(
|
|
element,
|
|
gst::StreamError::Failed,
|
|
["failed to wait for queue to become empty again"]
|
|
);
|
|
gst::FlowError::Error
|
|
})?;
|
|
}
|
|
|
|
self.state.lock().unwrap().last_res
|
|
}
|
|
|
|
fn sink_chain(
|
|
&self,
|
|
pad: &gst::Pad,
|
|
element: &gst::Element,
|
|
buffer: gst::Buffer,
|
|
) -> Result<gst::FlowSuccess, gst::FlowError> {
|
|
gst_log!(self.cat, obj: pad, "Handling buffer {:?}", buffer);
|
|
self.enqueue_item(pad, element, DataQueueItem::Buffer(buffer))
|
|
}
|
|
|
|
fn sink_chain_list(
|
|
&self,
|
|
pad: &gst::Pad,
|
|
element: &gst::Element,
|
|
list: gst::BufferList,
|
|
) -> Result<gst::FlowSuccess, gst::FlowError> {
|
|
gst_log!(self.cat, obj: pad, "Handling buffer list {:?}", list);
|
|
self.enqueue_item(pad, element, DataQueueItem::BufferList(list))
|
|
}
|
|
|
|
fn sink_event(&self, pad: &gst::Pad, element: &gst::Element, mut event: gst::Event) -> bool {
|
|
use gst::EventView;
|
|
|
|
gst_log!(self.cat, obj: pad, "Handling event {:?}", event);
|
|
|
|
let mut new_event = None;
|
|
match event.view() {
|
|
EventView::FlushStart(..) => {
|
|
let _ = self.stop(element);
|
|
}
|
|
EventView::FlushStop(..) => {
|
|
let (res, state, pending) = element.get_state(0.into());
|
|
if res == Ok(gst::StateChangeSuccess::Success) && state == gst::State::Paused
|
|
|| res == Ok(gst::StateChangeSuccess::Async) && pending == gst::State::Paused
|
|
{
|
|
let _ = self.start(element);
|
|
}
|
|
}
|
|
EventView::CustomDownstreamSticky(e) => {
|
|
let s = e.get_structure().unwrap();
|
|
if s.get_name() == "ts-io-context" {
|
|
let mut state = self.state.lock().unwrap();
|
|
let io_context = s.get::<&IOContext>("io-context").unwrap();
|
|
let pending_future_id = s.get::<&PendingFutureId>("pending-future-id").unwrap();
|
|
|
|
gst_debug!(
|
|
self.cat,
|
|
obj: element,
|
|
"Got upstream pending future id {:?}",
|
|
pending_future_id
|
|
);
|
|
|
|
state.io_context_in = Some(io_context.clone());
|
|
state.pending_future_id_in = Some(*pending_future_id);
|
|
|
|
new_event = Self::create_io_context_event(&state);
|
|
|
|
// Get rid of reconfigure flag
|
|
self.src_pad.check_reconfigure();
|
|
}
|
|
}
|
|
_ => (),
|
|
};
|
|
|
|
if let Some(new_event) = new_event {
|
|
event = new_event;
|
|
}
|
|
|
|
if event.is_serialized() {
|
|
gst_log!(self.cat, obj: pad, "Queuing event {:?}", event);
|
|
let _ = self.enqueue_item(pad, element, DataQueueItem::Event(event));
|
|
true
|
|
} else {
|
|
gst_log!(self.cat, obj: pad, "Forwarding event {:?}", event);
|
|
self.src_pad.push_event(event)
|
|
}
|
|
}
|
|
|
|
fn sink_query(
|
|
&self,
|
|
pad: &gst::Pad,
|
|
_element: &gst::Element,
|
|
query: &mut gst::QueryRef,
|
|
) -> bool {
|
|
gst_log!(self.cat, obj: pad, "Handling query {:?}", query);
|
|
|
|
if query.is_serialized() {
|
|
// FIXME: How can we do this?
|
|
gst_log!(self.cat, obj: pad, "Dropping serialized query {:?}", query);
|
|
false
|
|
} else {
|
|
gst_log!(self.cat, obj: pad, "Forwarding query {:?}", query);
|
|
self.src_pad.peer_query(query)
|
|
}
|
|
}
|
|
|
|
fn src_event(&self, pad: &gst::Pad, element: &gst::Element, event: gst::Event) -> bool {
|
|
use gst::EventView;
|
|
|
|
gst_log!(self.cat, obj: pad, "Handling event {:?}", event);
|
|
|
|
match event.view() {
|
|
EventView::FlushStart(..) => {
|
|
let _ = self.stop(element);
|
|
}
|
|
EventView::FlushStop(..) => {
|
|
let (res, state, pending) = element.get_state(0.into());
|
|
if res == Ok(gst::StateChangeSuccess::Success) && state == gst::State::Playing
|
|
|| res == Ok(gst::StateChangeSuccess::Async) && pending == gst::State::Playing
|
|
{
|
|
let _ = self.start(element);
|
|
}
|
|
}
|
|
_ => (),
|
|
};
|
|
|
|
gst_log!(self.cat, obj: pad, "Forwarding event {:?}", event);
|
|
self.sink_pad.push_event(event)
|
|
}
|
|
|
|
fn src_query(
|
|
&self,
|
|
pad: &gst::Pad,
|
|
_element: &gst::Element,
|
|
query: &mut gst::QueryRef,
|
|
) -> bool {
|
|
use gst::QueryView;
|
|
|
|
gst_log!(self.cat, obj: pad, "Handling query {:?}", query);
|
|
match query.view_mut() {
|
|
QueryView::Scheduling(ref mut q) => {
|
|
let mut new_query = gst::Query::new_scheduling();
|
|
let res = self.sink_pad.peer_query(&mut new_query);
|
|
if !res {
|
|
return res;
|
|
}
|
|
|
|
gst_log!(self.cat, obj: pad, "Upstream returned {:?}", new_query);
|
|
|
|
let (flags, min, max, align) = new_query.get_result();
|
|
q.set(flags, min, max, align);
|
|
q.add_scheduling_modes(
|
|
&new_query
|
|
.get_scheduling_modes()
|
|
.iter()
|
|
.cloned()
|
|
.filter(|m| m != &gst::PadMode::Pull)
|
|
.collect::<Vec<_>>(),
|
|
);
|
|
gst_log!(self.cat, obj: pad, "Returning {:?}", q.get_mut_query());
|
|
return true;
|
|
}
|
|
_ => (),
|
|
};
|
|
|
|
gst_log!(self.cat, obj: pad, "Forwarding query {:?}", query);
|
|
self.sink_pad.peer_query(query)
|
|
}
|
|
|
|
fn push_item(
|
|
&self,
|
|
element: &gst::Element,
|
|
item: DataQueueItem,
|
|
) -> future::Either<
|
|
Box<Future<Item = (), Error = gst::FlowError> + Send + 'static>,
|
|
future::FutureResult<(), gst::FlowError>,
|
|
> {
|
|
let event = {
|
|
let state = self.state.lock().unwrap();
|
|
if let Some((Some(ref task), _, _)) = state.pending_queue {
|
|
task.notify();
|
|
}
|
|
|
|
if self.src_pad.check_reconfigure() {
|
|
Self::create_io_context_event(&state)
|
|
} else {
|
|
None
|
|
}
|
|
};
|
|
|
|
if let Some(event) = event {
|
|
self.src_pad.push_event(event);
|
|
}
|
|
|
|
let res = match item {
|
|
DataQueueItem::Buffer(buffer) => {
|
|
gst_log!(self.cat, obj: element, "Forwarding buffer {:?}", buffer);
|
|
self.src_pad.push(buffer).map(|_| ())
|
|
}
|
|
DataQueueItem::BufferList(list) => {
|
|
gst_log!(self.cat, obj: element, "Forwarding buffer list {:?}", list);
|
|
self.src_pad.push_list(list).map(|_| ())
|
|
}
|
|
DataQueueItem::Event(event) => {
|
|
gst_log!(self.cat, obj: element, "Forwarding event {:?}", event);
|
|
self.src_pad.push_event(event);
|
|
Ok(())
|
|
}
|
|
};
|
|
|
|
let res = match res {
|
|
Ok(_) => {
|
|
gst_log!(self.cat, obj: element, "Successfully pushed item");
|
|
let mut state = self.state.lock().unwrap();
|
|
state.last_res = Ok(gst::FlowSuccess::Ok);
|
|
Ok(())
|
|
}
|
|
Err(gst::FlowError::Flushing) => {
|
|
gst_debug!(self.cat, obj: element, "Flushing");
|
|
let mut state = self.state.lock().unwrap();
|
|
if let Some(ref queue) = state.queue {
|
|
queue.pause();
|
|
}
|
|
state.last_res = Err(gst::FlowError::Flushing);
|
|
Ok(())
|
|
}
|
|
Err(gst::FlowError::Eos) => {
|
|
gst_debug!(self.cat, obj: element, "EOS");
|
|
let mut state = self.state.lock().unwrap();
|
|
if let Some(ref queue) = state.queue {
|
|
queue.pause();
|
|
}
|
|
state.last_res = Err(gst::FlowError::Eos);
|
|
Ok(())
|
|
}
|
|
Err(err) => {
|
|
gst_error!(self.cat, obj: element, "Got error {}", err);
|
|
gst_element_error!(
|
|
element,
|
|
gst::StreamError::Failed,
|
|
("Internal data stream error"),
|
|
["streaming stopped, reason {}", err]
|
|
);
|
|
let mut state = self.state.lock().unwrap();
|
|
state.last_res = Err(err);
|
|
Err(gst::FlowError::CustomError)
|
|
}
|
|
};
|
|
|
|
match res {
|
|
Ok(()) => {
|
|
let mut state = self.state.lock().unwrap();
|
|
|
|
if let State {
|
|
io_context: Some(ref io_context),
|
|
pending_future_id: Some(ref pending_future_id),
|
|
ref mut pending_future_cancel,
|
|
..
|
|
} = *state
|
|
{
|
|
let (cancel, future) = io_context.drain_pending_futures(*pending_future_id);
|
|
*pending_future_cancel = cancel;
|
|
|
|
future
|
|
} else {
|
|
future::Either::B(future::ok(()))
|
|
}
|
|
}
|
|
Err(err) => future::Either::B(future::err(err)),
|
|
}
|
|
}
|
|
|
|
fn prepare(&self, element: &gst::Element) -> Result<(), gst::ErrorMessage> {
|
|
gst_debug!(self.cat, obj: element, "Preparing");
|
|
|
|
let settings = self.settings.lock().unwrap().clone();
|
|
|
|
let mut state = self.state.lock().unwrap();
|
|
|
|
let io_context =
|
|
IOContext::new(&settings.context, settings.context_wait).map_err(|err| {
|
|
gst_error_msg!(
|
|
gst::ResourceError::OpenRead,
|
|
["Failed to create IO context: {}", err]
|
|
)
|
|
})?;
|
|
|
|
let dataqueue = DataQueue::new(
|
|
&element.clone().upcast(),
|
|
if settings.max_size_buffers == 0 {
|
|
None
|
|
} else {
|
|
Some(settings.max_size_buffers)
|
|
},
|
|
if settings.max_size_bytes == 0 {
|
|
None
|
|
} else {
|
|
Some(settings.max_size_bytes)
|
|
},
|
|
if settings.max_size_time == 0 {
|
|
None
|
|
} else {
|
|
Some(settings.max_size_time)
|
|
},
|
|
);
|
|
|
|
let element_clone = element.clone();
|
|
let element_clone2 = element.clone();
|
|
dataqueue
|
|
.schedule(
|
|
&io_context,
|
|
move |item| {
|
|
let queue = Self::from_instance(&element_clone);
|
|
queue.push_item(&element_clone, item)
|
|
},
|
|
move |err| {
|
|
let queue = Self::from_instance(&element_clone2);
|
|
gst_error!(queue.cat, obj: &element_clone2, "Got error {}", err);
|
|
match err {
|
|
gst::FlowError::CustomError => (),
|
|
err => {
|
|
gst_element_error!(
|
|
element_clone2,
|
|
gst::StreamError::Failed,
|
|
("Internal data stream error"),
|
|
["streaming stopped, reason {}", err]
|
|
);
|
|
}
|
|
}
|
|
},
|
|
)
|
|
.map_err(|_| {
|
|
gst_error_msg!(
|
|
gst::ResourceError::OpenRead,
|
|
["Failed to schedule data queue"]
|
|
)
|
|
})?;
|
|
|
|
let pending_future_id = io_context.acquire_pending_future_id();
|
|
gst_debug!(
|
|
self.cat,
|
|
obj: element,
|
|
"Got pending future id {:?}",
|
|
pending_future_id
|
|
);
|
|
|
|
state.io_context = Some(io_context);
|
|
state.queue = Some(dataqueue);
|
|
state.pending_future_id = Some(pending_future_id);
|
|
|
|
gst_debug!(self.cat, obj: element, "Prepared");
|
|
|
|
Ok(())
|
|
}
|
|
|
|
fn unprepare(&self, element: &gst::Element) -> Result<(), ()> {
|
|
gst_debug!(self.cat, obj: element, "Unpreparing");
|
|
|
|
// FIXME: The IO Context has to be alive longer than the queue,
|
|
// otherwise the queue can't finish any remaining work
|
|
let (mut queue, io_context) = {
|
|
let mut state = self.state.lock().unwrap();
|
|
if let (&Some(ref pending_future_id), &Some(ref io_context)) =
|
|
(&state.pending_future_id, &state.io_context)
|
|
{
|
|
io_context.release_pending_future_id(*pending_future_id);
|
|
}
|
|
|
|
let queue = state.queue.take();
|
|
let io_context = state.io_context.take();
|
|
|
|
*state = State::default();
|
|
|
|
(queue, io_context)
|
|
};
|
|
|
|
if let Some(ref queue) = queue.take() {
|
|
queue.shutdown();
|
|
}
|
|
drop(io_context);
|
|
|
|
gst_debug!(self.cat, obj: element, "Unprepared");
|
|
Ok(())
|
|
}
|
|
|
|
fn start(&self, element: &gst::Element) -> Result<(), ()> {
|
|
gst_debug!(self.cat, obj: element, "Starting");
|
|
let mut state = self.state.lock().unwrap();
|
|
|
|
if let Some(ref queue) = state.queue {
|
|
queue.unpause();
|
|
}
|
|
state.last_res = Ok(gst::FlowSuccess::Ok);
|
|
|
|
gst_debug!(self.cat, obj: element, "Started");
|
|
|
|
Ok(())
|
|
}
|
|
|
|
fn stop(&self, element: &gst::Element) -> Result<(), ()> {
|
|
gst_debug!(self.cat, obj: element, "Stopping");
|
|
let mut state = self.state.lock().unwrap();
|
|
|
|
if let Some(ref queue) = state.queue {
|
|
queue.pause();
|
|
queue.clear(&self.src_pad);
|
|
}
|
|
if let Some((Some(task), _, _)) = state.pending_queue.take() {
|
|
task.notify();
|
|
}
|
|
let _ = state.pending_future_cancel.take();
|
|
state.last_res = Err(gst::FlowError::Flushing);
|
|
|
|
gst_debug!(self.cat, obj: element, "Stopped");
|
|
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl ObjectSubclass for Queue {
|
|
const NAME: &'static str = "RsTsQueue";
|
|
type ParentType = gst::Element;
|
|
type Instance = gst::subclass::ElementInstanceStruct<Self>;
|
|
type Class = subclass::simple::ClassStruct<Self>;
|
|
|
|
glib_object_subclass!();
|
|
|
|
fn class_init(klass: &mut subclass::simple::ClassStruct<Self>) {
|
|
klass.set_metadata(
|
|
"Thread-sharing queue",
|
|
"Generic",
|
|
"Simple data queue",
|
|
"Sebastian Dröge <sebastian@centricular.com>",
|
|
);
|
|
|
|
let caps = gst::Caps::new_any();
|
|
|
|
let sink_pad_template = gst::PadTemplate::new(
|
|
"sink",
|
|
gst::PadDirection::Sink,
|
|
gst::PadPresence::Always,
|
|
&caps,
|
|
);
|
|
klass.add_pad_template(sink_pad_template);
|
|
|
|
let src_pad_template = gst::PadTemplate::new(
|
|
"src",
|
|
gst::PadDirection::Src,
|
|
gst::PadPresence::Always,
|
|
&caps,
|
|
);
|
|
klass.add_pad_template(src_pad_template);
|
|
|
|
klass.install_properties(&PROPERTIES);
|
|
}
|
|
|
|
fn new_with_class(klass: &subclass::simple::ClassStruct<Self>) -> Self {
|
|
let templ = klass.get_pad_template("sink").unwrap();
|
|
let sink_pad = gst::Pad::new_from_template(&templ, "sink");
|
|
let templ = klass.get_pad_template("src").unwrap();
|
|
let src_pad = gst::Pad::new_from_template(&templ, "src");
|
|
|
|
sink_pad.set_chain_function(|pad, parent, buffer| {
|
|
Queue::catch_panic_pad_function(
|
|
parent,
|
|
|| Err(gst::FlowError::Error),
|
|
|queue, element| queue.sink_chain(pad, element, buffer),
|
|
)
|
|
});
|
|
sink_pad.set_chain_list_function(|pad, parent, list| {
|
|
Queue::catch_panic_pad_function(
|
|
parent,
|
|
|| Err(gst::FlowError::Error),
|
|
|queue, element| queue.sink_chain_list(pad, element, list),
|
|
)
|
|
});
|
|
sink_pad.set_event_function(|pad, parent, event| {
|
|
Queue::catch_panic_pad_function(
|
|
parent,
|
|
|| false,
|
|
|queue, element| queue.sink_event(pad, element, event),
|
|
)
|
|
});
|
|
sink_pad.set_query_function(|pad, parent, query| {
|
|
Queue::catch_panic_pad_function(
|
|
parent,
|
|
|| false,
|
|
|queue, element| queue.sink_query(pad, element, query),
|
|
)
|
|
});
|
|
|
|
src_pad.set_event_function(|pad, parent, event| {
|
|
Queue::catch_panic_pad_function(
|
|
parent,
|
|
|| false,
|
|
|queue, element| queue.src_event(pad, element, event),
|
|
)
|
|
});
|
|
src_pad.set_query_function(|pad, parent, query| {
|
|
Queue::catch_panic_pad_function(
|
|
parent,
|
|
|| false,
|
|
|queue, element| queue.src_query(pad, element, query),
|
|
)
|
|
});
|
|
|
|
Self {
|
|
cat: gst::DebugCategory::new(
|
|
"ts-queue",
|
|
gst::DebugColorFlags::empty(),
|
|
"Thread-sharing queue",
|
|
),
|
|
sink_pad: sink_pad,
|
|
src_pad: src_pad,
|
|
state: Mutex::new(State::default()),
|
|
settings: Mutex::new(Settings::default()),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl ObjectImpl for Queue {
|
|
glib_object_impl!();
|
|
|
|
fn set_property(&self, _obj: &glib::Object, id: usize, value: &glib::Value) {
|
|
let prop = &PROPERTIES[id];
|
|
|
|
match *prop {
|
|
subclass::Property("max-size-buffers", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.max_size_buffers = value.get().unwrap();
|
|
}
|
|
subclass::Property("max-size-bytes", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.max_size_bytes = value.get().unwrap();
|
|
}
|
|
subclass::Property("max-size-time", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.max_size_time = value.get().unwrap();
|
|
}
|
|
subclass::Property("context", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.context = value.get().unwrap_or_else(|| "".into());
|
|
}
|
|
subclass::Property("context-wait", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.context_wait = value.get().unwrap();
|
|
}
|
|
_ => unimplemented!(),
|
|
}
|
|
}
|
|
|
|
fn get_property(&self, _obj: &glib::Object, id: usize) -> Result<glib::Value, ()> {
|
|
let prop = &PROPERTIES[id];
|
|
|
|
match *prop {
|
|
subclass::Property("max-size-buffers", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
Ok(settings.max_size_buffers.to_value())
|
|
}
|
|
subclass::Property("max-size-bytes", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
Ok(settings.max_size_bytes.to_value())
|
|
}
|
|
subclass::Property("max-size-time", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
Ok(settings.max_size_time.to_value())
|
|
}
|
|
subclass::Property("context", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
Ok(settings.context.to_value())
|
|
}
|
|
subclass::Property("context-wait", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
Ok(settings.context_wait.to_value())
|
|
}
|
|
_ => unimplemented!(),
|
|
}
|
|
}
|
|
|
|
fn constructed(&self, obj: &glib::Object) {
|
|
self.parent_constructed(obj);
|
|
|
|
let element = obj.downcast_ref::<gst::Element>().unwrap();
|
|
element.add_pad(&self.sink_pad).unwrap();
|
|
element.add_pad(&self.src_pad).unwrap();
|
|
}
|
|
}
|
|
|
|
impl ElementImpl for Queue {
|
|
fn change_state(
|
|
&self,
|
|
element: &gst::Element,
|
|
transition: gst::StateChange,
|
|
) -> Result<gst::StateChangeSuccess, gst::StateChangeError> {
|
|
gst_trace!(self.cat, obj: element, "Changing state {:?}", transition);
|
|
|
|
match transition {
|
|
gst::StateChange::NullToReady => {
|
|
self.prepare(element).map_err(|err| {
|
|
element.post_error_message(&err);
|
|
gst::StateChangeError
|
|
})?;
|
|
}
|
|
gst::StateChange::PausedToReady => {
|
|
self.stop(element).map_err(|_| gst::StateChangeError)?;
|
|
}
|
|
gst::StateChange::ReadyToNull => {
|
|
self.unprepare(element).map_err(|_| gst::StateChangeError)?;
|
|
}
|
|
_ => (),
|
|
}
|
|
|
|
let success = self.parent_change_state(element, transition)?;
|
|
|
|
if transition == gst::StateChange::ReadyToPaused {
|
|
self.start(element).map_err(|_| gst::StateChangeError)?;
|
|
}
|
|
|
|
Ok(success)
|
|
}
|
|
}
|
|
|
|
pub fn register(plugin: &gst::Plugin) -> Result<(), glib::BoolError> {
|
|
gst::Element::register(plugin, "ts-queue", 0, Queue::get_type())
|
|
}
|