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fallbacksrc: Fallback to videotestsrc if image fallback URI is invalid

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... or on error from video fallback path
This commit is contained in:
Seungha Yang 2020-12-11 01:16:20 +09:00 committed by Sebastian Dröge
parent b5796f5773
commit c7fe08bf6d
4 changed files with 572 additions and 175 deletions
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219
utils/fallbackswitch/src/fallbacksrc/imp.rs
View file

@ -20,10 +20,7 @@ use glib::subclass;
use glib::subclass::prelude::*;
use gst::prelude::*;
use gst::subclass::prelude::*;
use gst::{
gst_debug, gst_element_error, gst_element_warning, gst_error, gst_error_msg, gst_info,
gst_warning,
};
use gst::{gst_debug, gst_element_error, gst_error, gst_error_msg, gst_info, gst_warning};
use std::mem;
use std::sync::Mutex;
@ -32,6 +29,7 @@ use std::time::{Duration, Instant};
use once_cell::sync::Lazy;
use super::custom_source::CustomSource;
use super::video_fallback::VideoFallbackSource;
use super::{RetryReason, Status};
static CAT: Lazy<gst::DebugCategory> = Lazy::new(|| {
@ -756,180 +754,11 @@ impl FallbackSrc {
fn create_fallback_video_input(
&self,
element: &super::FallbackSrc,
_element: &super::FallbackSrc,
min_latency: u64,
fallback_uri: Option<&str>,
) -> Result<gst::Element, gst::StateChangeError> {
let input = gst::Bin::new(Some("fallback_video"));
let srcpad = match fallback_uri {
Some(fallback_uri) => {
let filesrc = gst::ElementFactory::make("filesrc", Some("fallback_filesrc"))
.expect("No filesrc found");
let typefind = gst::ElementFactory::make("typefind", Some("fallback_typefind"))
.expect("No typefind found");
let videoconvert =
gst::ElementFactory::make("videoconvert", Some("fallback_videoconvert"))
.expect("No videoconvert found");
let videoscale =
gst::ElementFactory::make("videoscale", Some("fallback_videoscale"))
.expect("No videoscale found");
let imagefreeze =
gst::ElementFactory::make("imagefreeze", Some("fallback_imagefreeze"))
.expect("No imagefreeze found");
let clocksync = gst::ElementFactory::make("clocksync", Some("fallback_clocksync"))
.or_else(|_| -> Result<_, glib::BoolError> {
let identity =
gst::ElementFactory::make("identity", Some("fallback_clocksync"))?;
identity.set_property("sync", &true).unwrap();
Ok(identity)
})
.expect("No clocksync or identity found");
let queue = gst::ElementFactory::make("queue", Some("fallback_queue"))
.expect("No queue found");
queue
.set_properties(&[
("max-size-buffers", &0u32),
("max-size-bytes", &0u32),
(
"max-size-time",
&gst::ClockTime::max(5 * gst::SECOND, min_latency.into()).unwrap(),
),
])
.unwrap();
input
.add_many(&[
&filesrc,
&typefind,
&videoconvert,
&videoscale,
&imagefreeze,
&clocksync,
&queue,
])
.unwrap();
gst::Element::link_many(&[&filesrc, &typefind]).unwrap();
gst::Element::link_many(&[
&videoconvert,
&videoscale,
&imagefreeze,
&clocksync,
&queue,
])
.unwrap();
filesrc
.dynamic_cast_ref::<gst::URIHandler>()
.unwrap()
.set_uri(fallback_uri)
.map_err(|err| {
gst_error!(CAT, obj: element, "Failed to set fallback URI: {}", err);
gst_element_error!(
element,
gst::LibraryError::Settings,
["Failed to set fallback URI: {}", err]
);
gst::StateChangeError
})?;
if imagefreeze.set_property("is-live", &true).is_err() {
gst_error!(
CAT,
obj: element,
"imagefreeze does not support live mode, this will probably misbehave"
);
gst_element_warning!(
element,
gst::LibraryError::Settings,
["imagefreeze does not support live mode, this will probably misbehave"]
);
}
let element_weak = element.downgrade();
let input_weak = input.downgrade();
let videoconvert_weak = videoconvert.downgrade();
typefind
.connect("have-type", false, move |args| {
let typefind = args[0].get::<gst::Element>().unwrap().unwrap();
let _probability = args[1].get_some::<u32>().unwrap();
let caps = args[2].get::<gst::Caps>().unwrap().unwrap();
let element = match element_weak.upgrade() {
Some(element) => element,
None => return None,
};
let input = match input_weak.upgrade() {
Some(element) => element,
None => return None,
};
let videoconvert = match videoconvert_weak.upgrade() {
Some(element) => element,
None => return None,
};
let s = caps.get_structure(0).unwrap();
let decoder;
if s.get_name() == "image/jpeg" {
decoder = gst::ElementFactory::make("jpegdec", Some("decoder"))
.expect("jpegdec not found");
} else if s.get_name() == "image/png" {
decoder = gst::ElementFactory::make("pngdec", Some("decoder"))
.expect("pngdec not found");
} else {
gst_error!(CAT, obj: &element, "Unsupported caps {}", caps);
gst_element_error!(
element,
gst::StreamError::Format,
["Unsupported caps {}", caps]
);
return None;
}
input.add(&decoder).unwrap();
decoder.sync_state_with_parent().unwrap();
if let Err(_err) =
gst::Element::link_many(&[&typefind, &decoder, &videoconvert])
{
gst_error!(CAT, obj: &element, "Can't link fallback image decoder");
gst_element_error!(
element,
gst::StreamError::Format,
["Can't link fallback image decoder"]
);
return None;
}
None
})
.unwrap();
queue.get_static_pad("src").unwrap()
}
None => {
let videotestsrc =
gst::ElementFactory::make("videotestsrc", Some("fallback_videosrc"))
.expect("No videotestsrc found");
input.add_many(&[&videotestsrc]).unwrap();
videotestsrc.set_property_from_str("pattern", "black");
videotestsrc.set_property("is-live", &true).unwrap();
videotestsrc.get_static_pad("src").unwrap()
}
};
input
.add_pad(
&gst::GhostPad::builder(Some("src"), gst::PadDirection::Src)
.build_with_target(&srcpad)
.unwrap(),
)
.unwrap();
Ok(input.upcast())
Ok(VideoFallbackSource::new(fallback_uri, min_latency).upcast())
}
fn create_fallback_audio_input(
@ -1964,6 +1793,46 @@ impl FallbackSrc {
return true;
}
// Check if error is from video fallback input and if so, try another
// fallback to videotestsrc
if let Some(ref mut video_stream) = state.video_stream {
if src == video_stream.fallback_input
|| src.has_as_ancestor(&video_stream.fallback_input)
{
gst_debug!(CAT, obj: element, "Got error from video fallback input");
let prev_fallback_uri = video_stream
.fallback_input
.get_property("uri")
.unwrap()
.get::<String>()
.unwrap();
// This means previously videotestsrc was configured
// Something went wrong and there is no other way than to error out
if prev_fallback_uri.is_none() {
return false;
}
let fallback_input = &video_stream.fallback_input;
fallback_input.call_async(|fallback_input| {
// Re-run video fallback input with videotestsrc
let _ = fallback_input.set_state(gst::State::Null);
let _ = fallback_input.set_property("uri", &None::<&str>);
let _ = fallback_input.sync_state_with_parent();
});
return true;
}
}
gst_error!(
CAT,
obj: element,
"Give up for error message from {}",
src.get_path_string()
);
false
}

1
utils/fallbackswitch/src/fallbacksrc/mod.rs
View file

@ -19,6 +19,7 @@ use glib::prelude::*;
mod custom_source;
mod imp;
mod video_fallback;
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy, glib::GEnum)]
#[repr(u32)]

485
utils/fallbackswitch/src/fallbacksrc/video_fallback/imp.rs Normal file
View file

@ -0,0 +1,485 @@
// Copyright (C) 2020 Sebastian Dröge <sebastian@centricular.com>
// Copyright (C) 2020 Seungha Yang <seungha@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::prelude::*;
use glib::subclass;
use glib::subclass::prelude::*;
use gst::prelude::*;
use gst::subclass::prelude::*;
use gst::{gst_debug, gst_element_error, gst_element_warning, gst_error, gst_info, gst_warning};
use std::sync::{atomic::AtomicBool, atomic::Ordering, Mutex};
use once_cell::sync::Lazy;
static CAT: Lazy<gst::DebugCategory> = Lazy::new(|| {
gst::DebugCategory::new(
"fallbacksrc-video-source",
gst::DebugColorFlags::empty(),
Some("Fallback Video Source Bin"),
)
});
static PROPERTIES: [subclass::Property; 2] = [
subclass::Property("uri", |name| {
glib::ParamSpec::string(
name,
"URI",
"URI to use for video in case the main stream doesn't work",
None,
glib::ParamFlags::READWRITE,
)
}),
subclass::Property("min-latency", |name| {
glib::ParamSpec::uint64(
name,
"Minimum Latency",
"Minimum Latency",
0,
std::u64::MAX,
0,
glib::ParamFlags::READWRITE,
)
}),
];
#[derive(Debug, Clone)]
struct Settings {
uri: Option<String>,
min_latency: u64,
}
impl Default for Settings {
fn default() -> Self {
Settings {
uri: None,
min_latency: 0,
}
}
}
struct State {
source: gst::Element,
}
pub struct VideoFallbackSource {
srcpad: gst::GhostPad,
got_error: AtomicBool,
state: Mutex<Option<State>>,
settings: Mutex<Settings>,
}
impl ObjectSubclass for VideoFallbackSource {
const NAME: &'static str = "FallbackSrcVideoFallbackSource";
type Type = super::VideoFallbackSource;
type ParentType = gst::Bin;
type Instance = gst::subclass::ElementInstanceStruct<Self>;
type Class = subclass::simple::ClassStruct<Self>;
glib::glib_object_subclass!();
fn with_class(klass: &Self::Class) -> Self {
let templ = klass.get_pad_template("src").unwrap();
let srcpad = gst::GhostPad::builder_with_template(&templ, Some(&templ.get_name())).build();
Self {
srcpad,
got_error: AtomicBool::new(false),
state: Mutex::new(None),
settings: Mutex::new(Settings::default()),
}
}
fn class_init(klass: &mut Self::Class) {
let src_pad_template = gst::PadTemplate::new(
"src",
gst::PadDirection::Src,
gst::PadPresence::Always,
&gst::Caps::new_any(),
)
.unwrap();
klass.add_pad_template(src_pad_template);
klass.install_properties(&PROPERTIES);
}
}
impl ObjectImpl for VideoFallbackSource {
fn set_property(&self, obj: &Self::Type, id: usize, value: &glib::Value) {
let prop = &PROPERTIES[id];
match *prop {
subclass::Property("uri", ..) => {
let mut settings = self.settings.lock().unwrap();
let new_value = value.get().expect("type checked upstream");
gst_info!(
CAT,
obj: obj,
"Changing URI from {:?} to {:?}",
settings.uri,
new_value,
);
settings.uri = new_value;
}
subclass::Property("min-latency", ..) => {
let mut settings = self.settings.lock().unwrap();
let new_value = value.get_some().expect("type checked upstream");
gst_info!(
CAT,
obj: obj,
"Changing Minimum Latency from {:?} to {:?}",
settings.min_latency,
new_value,
);
settings.min_latency = new_value;
}
_ => unreachable!(),
}
}
fn get_property(&self, _obj: &Self::Type, id: usize) -> glib::Value {
let prop = &PROPERTIES[id];
match *prop {
subclass::Property("uri", ..) => {
let settings = self.settings.lock().unwrap();
settings.uri.to_value()
}
subclass::Property("min-latency", ..) => {
let settings = self.settings.lock().unwrap();
settings.min_latency.to_value()
}
_ => unimplemented!(),
}
}
fn constructed(&self, obj: &Self::Type) {
self.parent_constructed(obj);
obj.set_suppressed_flags(gst::ElementFlags::SOURCE | gst::ElementFlags::SINK);
obj.set_element_flags(gst::ElementFlags::SOURCE);
obj.add_pad(&self.srcpad).unwrap();
}
}
impl ElementImpl for VideoFallbackSource {
#[allow(clippy::single_match)]
fn change_state(
&self,
element: &Self::Type,
transition: gst::StateChange,
) -> Result<gst::StateChangeSuccess, gst::StateChangeError> {
match transition {
gst::StateChange::NullToReady => {
self.start(element)?;
}
_ => (),
}
self.parent_change_state(element, transition)?;
match transition {
gst::StateChange::ReadyToNull => {
self.stop(element)?;
}
_ => (),
}
Ok(gst::StateChangeSuccess::Success)
}
}
impl BinImpl for VideoFallbackSource {
#[allow(clippy::single_match)]
fn handle_message(&self, bin: &Self::Type, msg: gst::Message) {
use gst::MessageView;
match msg.view() {
MessageView::Error(err) => {
if !self
.got_error
.compare_and_swap(false, true, Ordering::SeqCst)
{
gst_warning!(CAT, obj: bin, "Got error {:?}", err);
self.parent_handle_message(bin, msg)
} else {
// Suppress error message if we posted error previously.
// Otherwise parent fallbacksrc would be confused by
// multiple error message.
gst_debug!(CAT, obj: bin, "Ignore error {:?}", err);
}
}
_ => self.parent_handle_message(bin, msg),
}
}
}
impl VideoFallbackSource {
fn get_file_src_for_uri(
&self,
element: &super::VideoFallbackSource,
uri: Option<&str>,
) -> Option<gst::Element> {
uri?;
let uri = uri.unwrap();
let filesrc = gst::ElementFactory::make("filesrc", Some("fallback_filesrc"))
.expect("No filesrc found");
if let Err(err) = filesrc
.dynamic_cast_ref::<gst::URIHandler>()
.unwrap()
.set_uri(uri)
{
gst_warning!(CAT, obj: element, "Failed to set URI: {}", err);
return None;
}
if filesrc.set_state(gst::State::Ready).is_err() {
gst_warning!(CAT, obj: element, "Couldn't set state READY");
let _ = filesrc.set_state(gst::State::Null);
return None;
}
// To invoke GstBaseSrc::start() method, activate pad manually.
// filesrc will check whether given file is readable or not
// via open() and fstat() in there.
let pad = filesrc.get_static_pad("src").unwrap();
if pad.set_active(true).is_err() {
gst_warning!(CAT, obj: element, "Couldn't active pad");
let _ = filesrc.set_state(gst::State::Null);
return None;
}
Some(filesrc)
}
fn create_source(
&self,
element: &super::VideoFallbackSource,
min_latency: u64,
uri: Option<&str>,
) -> Result<gst::Element, gst::StateChangeError> {
gst_debug!(CAT, obj: element, "Creating source with uri {:?}", uri);
let source = gst::Bin::new(None);
let filesrc = self.get_file_src_for_uri(element, uri);
let srcpad = match filesrc {
Some(filesrc) => {
let typefind = gst::ElementFactory::make("typefind", Some("fallback_typefind"))
.expect("No typefind found");
let videoconvert =
gst::ElementFactory::make("videoconvert", Some("fallback_videoconvert"))
.expect("No videoconvert found");
let videoscale =
gst::ElementFactory::make("videoscale", Some("fallback_videoscale"))
.expect("No videoscale found");
let imagefreeze =
gst::ElementFactory::make("imagefreeze", Some("fallback_imagefreeze"))
.expect("No imagefreeze found");
let clocksync = gst::ElementFactory::make("clocksync", Some("fallback_clocksync"))
.or_else(|_| -> Result<_, glib::BoolError> {
let identity =
gst::ElementFactory::make("identity", Some("fallback_clocksync"))?;
identity.set_property("sync", &true).unwrap();
Ok(identity)
})
.expect("No clocksync or identity found");
let queue = gst::ElementFactory::make("queue", Some("fallback_queue"))
.expect("No queue found");
queue
.set_properties(&[
("max-size-buffers", &0u32),
("max-size-bytes", &0u32),
(
"max-size-time",
&gst::ClockTime::max(5 * gst::SECOND, min_latency.into()).unwrap(),
),
])
.unwrap();
source
.add_many(&[
&filesrc,
&typefind,
&videoconvert,
&videoscale,
&imagefreeze,
&clocksync,
&queue,
])
.unwrap();
gst::Element::link_many(&[&filesrc, &typefind]).unwrap();
gst::Element::link_many(&[
&videoconvert,
&videoscale,
&imagefreeze,
&clocksync,
&queue,
])
.unwrap();
if imagefreeze.set_property("is-live", &true).is_err() {
gst_error!(
CAT,
obj: element,
"imagefreeze does not support live mode, this will probably misbehave"
);
gst_element_warning!(
element,
gst::LibraryError::Settings,
["imagefreeze does not support live mode, this will probably misbehave"]
);
}
let element_weak = element.downgrade();
let source_weak = source.downgrade();
let videoconvert_weak = videoconvert.downgrade();
typefind
.connect("have-type", false, move |args| {
let typefind = args[0].get::<gst::Element>().unwrap().unwrap();
let _probability = args[1].get_some::<u32>().unwrap();
let caps = args[2].get::<gst::Caps>().unwrap().unwrap();
let element = match element_weak.upgrade() {
Some(element) => element,
None => return None,
};
let source = match source_weak.upgrade() {
Some(element) => element,
None => return None,
};
let videoconvert = match videoconvert_weak.upgrade() {
Some(element) => element,
None => return None,
};
let s = caps.get_structure(0).unwrap();
let decoder;
if s.get_name() == "image/jpeg" {
decoder = gst::ElementFactory::make("jpegdec", Some("decoder"))
.expect("jpegdec not found");
} else if s.get_name() == "image/png" {
decoder = gst::ElementFactory::make("pngdec", Some("decoder"))
.expect("pngdec not found");
} else {
gst_error!(CAT, obj: &element, "Unsupported caps {}", caps);
gst_element_error!(
element,
gst::StreamError::Format,
["Unsupported caps {}", caps]
);
return None;
}
source.add(&decoder).unwrap();
decoder.sync_state_with_parent().unwrap();
if let Err(_err) =
gst::Element::link_many(&[&typefind, &decoder, &videoconvert])
{
gst_error!(CAT, obj: &element, "Can't link fallback image decoder");
gst_element_error!(
element,
gst::StreamError::Format,
["Can't link fallback image decoder"]
);
return None;
}
None
})
.unwrap();
queue.get_static_pad("src").unwrap()
}
None => {
let videotestsrc =
gst::ElementFactory::make("videotestsrc", Some("fallback_videosrc"))
.expect("No videotestsrc found");
source.add_many(&[&videotestsrc]).unwrap();
videotestsrc.set_property_from_str("pattern", "black");
videotestsrc.set_property("is-live", &true).unwrap();
videotestsrc.get_static_pad("src").unwrap()
}
};
source
.add_pad(
&gst::GhostPad::builder(Some("src"), gst::PadDirection::Src)
.build_with_target(&srcpad)
.unwrap(),
)
.unwrap();
Ok(source.upcast())
}
fn start(
&self,
element: &super::VideoFallbackSource,
) -> Result<gst::StateChangeSuccess, gst::StateChangeError> {
gst_debug!(CAT, obj: element, "Starting");
let mut state_guard = self.state.lock().unwrap();
if state_guard.is_some() {
gst_error!(CAT, obj: element, "State struct wasn't cleared");
return Err(gst::StateChangeError);
}
let settings = self.settings.lock().unwrap().clone();
let uri = &settings.uri;
let source = self.create_source(element, settings.min_latency, uri.as_deref())?;
element.add(&source).unwrap();
let srcpad = source.get_static_pad("src").unwrap();
let _ = self.srcpad.set_target(Some(&srcpad));
*state_guard = Some(State { source });
Ok(gst::StateChangeSuccess::Success)
}
fn stop(
&self,
element: &super::VideoFallbackSource,
) -> Result<gst::StateChangeSuccess, gst::StateChangeError> {
gst_debug!(CAT, obj: element, "Stopping");
let mut state_guard = self.state.lock().unwrap();
let state = match state_guard.take() {
Some(state) => state,
None => return Ok(gst::StateChangeSuccess::Success),
};
drop(state_guard);
let _ = state.source.set_state(gst::State::Null);
let _ = self.srcpad.set_target(None::<&gst::Pad>);
element.remove(&state.source).unwrap();
self.got_error.store(false, Ordering::Relaxed);
gst_debug!(CAT, obj: element, "Stopped");
Ok(gst::StateChangeSuccess::Success)
}
}

42
utils/fallbackswitch/src/fallbacksrc/video_fallback/mod.rs Normal file
View file

@ -0,0 +1,42 @@
// Copyright (C) 2020 Sebastian Dröge <sebastian@centricular.com>
// Copyright (C) 2020 Seungha Yang <seungha@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::prelude::*;
mod imp;
glib::glib_wrapper! {
pub struct VideoFallbackSource(ObjectSubclass<imp::VideoFallbackSource>) @extends gst::Bin, gst::Element, gst::Object;
}
// GStreamer elements need to be thread-safe. For the private implementation this is automatically
// enforced but for the public wrapper type we need to specify this manually.
unsafe impl Send for VideoFallbackSource {}
unsafe impl Sync for VideoFallbackSource {}
impl VideoFallbackSource {
pub fn new(uri: Option<&str>, min_latency: u64) -> VideoFallbackSource {
glib::Object::new(
VideoFallbackSource::static_type(),
&[("uri", &uri), ("min-latency", &min_latency)],
)
.unwrap()
.downcast()
.unwrap()
}
}