mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-09-27 14:30:27 +00:00
456db123f2
The only None ranks now are: - cdgdec/cdgparse: Primary - rav1enc: Primary - reqwesthttpsrc: Marginal - s3sink/s3src: Primary - mccenc/mccparse: Primary - sccenc/sccparse: Primary All other ranks are set to None until the elements are ready to replace the existing C elements, or are otherwise production-ready and of a element kind that should be autoplugged in one way or another. For example the sodium elements are production-ready but can't be autoplugged and as such should stay at a None rank.
468 lines
13 KiB
Rust
468 lines
13 KiB
Rust
// Copyright (C) 2016-2018 Sebastian Dröge <sebastian@centricular.com>
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use hyperx::header::{
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AcceptRanges, ByteRangeSpec, ContentLength, ContentRange, ContentRangeSpec, Headers, Range,
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RangeUnit,
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};
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use reqwest::{Client, Response};
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use std::io::Read;
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use std::sync::Mutex;
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use std::u64;
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use url::Url;
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use glib;
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use glib::subclass;
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use glib::subclass::prelude::*;
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use gst;
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use gst::prelude::*;
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use gst::subclass::prelude::*;
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use gst_base;
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use gst_base::prelude::*;
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use gst_base::subclass::prelude::*;
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const DEFAULT_LOCATION: Option<Url> = None;
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#[derive(Debug, Clone)]
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struct Settings {
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location: Option<Url>,
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}
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impl Default for Settings {
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fn default() -> Self {
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Settings {
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location: DEFAULT_LOCATION,
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}
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}
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}
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static PROPERTIES: [subclass::Property; 1] = [subclass::Property("location", |name| {
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glib::ParamSpec::string(
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name,
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"File Location",
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"URL to read from",
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None,
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glib::ParamFlags::READWRITE,
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)
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})];
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#[derive(Debug)]
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enum State {
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Stopped,
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Started {
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uri: Url,
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response: Response,
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seekable: bool,
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position: u64,
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size: Option<u64>,
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start: u64,
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stop: Option<u64>,
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},
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}
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impl Default for State {
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fn default() -> Self {
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State::Stopped
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}
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}
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#[derive(Debug)]
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pub struct HttpSrc {
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cat: gst::DebugCategory,
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client: Client,
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settings: Mutex<Settings>,
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state: Mutex<State>,
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}
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impl HttpSrc {
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fn set_location(&self, _element: &gst_base::BaseSrc, uri: &str) -> Result<(), glib::Error> {
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let state = self.state.lock().unwrap();
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if let State::Started { .. } = *state {
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return Err(glib::Error::new(
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gst::URIError::BadState,
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"Changing the `location` property on a started `httpsrc` is not supported",
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));
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}
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let mut settings = self.settings.lock().unwrap();
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let uri = Url::parse(uri).map_err(|err| {
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glib::Error::new(
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gst::URIError::BadUri,
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format!("Failed to parse URI '{}': {:?}", uri, err,).as_str(),
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)
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})?;
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if uri.scheme() != "http" && uri.scheme() != "https" {
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return Err(glib::Error::new(
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gst::URIError::UnsupportedProtocol,
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format!("Unsupported URI scheme '{}'", uri.scheme(),).as_str(),
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));
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}
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settings.location = Some(uri);
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Ok(())
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}
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fn do_request(
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&self,
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src: &gst_base::BaseSrc,
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uri: Url,
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start: u64,
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stop: Option<u64>,
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) -> Result<State, gst::ErrorMessage> {
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let cat = self.cat;
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let req = self.client.get(uri.clone());
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let mut headers = Headers::new();
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match (start != 0, stop) {
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(false, None) => (),
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(true, None) => {
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headers.set(Range::Bytes(vec![ByteRangeSpec::AllFrom(start)]));
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}
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(_, Some(stop)) => {
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headers.set(Range::Bytes(vec![ByteRangeSpec::FromTo(start, stop - 1)]));
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}
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}
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// Add all headers for the request here
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let req = req.headers(headers.into());
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gst_debug!(cat, obj: src, "Doing new request {:?}", req);
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let response = try!(req.send().or_else(|err| {
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gst_error!(cat, obj: src, "Request failed: {:?}", err);
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Err(gst_error_msg!(
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gst::ResourceError::Read,
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["Failed to fetch {}: {}", uri, err.to_string()]
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))
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}));
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if !response.status().is_success() {
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gst_error!(cat, obj: src, "Request status failed: {:?}", response);
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return Err(gst_error_msg!(
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gst::ResourceError::Read,
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["Failed to fetch {}: {}", uri, response.status()]
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));
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}
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let headers = Headers::from(response.headers());
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let size = headers.get().map(|&ContentLength(cl)| cl + start);
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let accept_byte_ranges = if let Some(&AcceptRanges(ref ranges)) = headers.get() {
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ranges.iter().any(|u| *u == RangeUnit::Bytes)
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} else {
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false
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};
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let seekable = size.is_some() && accept_byte_ranges;
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let position = if let Some(&ContentRange(ContentRangeSpec::Bytes {
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range: Some((range_start, _)),
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..
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})) = headers.get()
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{
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range_start
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} else {
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start
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};
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if position != start {
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return Err(gst_error_msg!(
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gst::ResourceError::Seek,
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["Failed to seek to {}: Got {}", start, position]
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));
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}
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gst_debug!(cat, obj: src, "Request successful: {:?}", response);
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Ok(State::Started {
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uri,
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response,
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seekable,
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position: 0,
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size,
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start,
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stop,
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})
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}
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}
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impl ObjectImpl for HttpSrc {
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glib_object_impl!();
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fn set_property(&self, obj: &glib::Object, id: usize, value: &glib::Value) {
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let prop = &PROPERTIES[id];
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match *prop {
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subclass::Property("location", ..) => {
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let element = obj.downcast_ref::<gst_base::BaseSrc>().unwrap();
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let location = value.get::<&str>().unwrap();
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let res = self.set_location(element, location);
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if let Err(err) = res {
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gst_error!(
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self.cat,
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obj: element,
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"Failed to set property `location`: {:?}",
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err
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);
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}
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}
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_ => unimplemented!(),
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};
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}
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fn get_property(&self, _obj: &glib::Object, id: usize) -> Result<glib::Value, ()> {
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let prop = &PROPERTIES[id];
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match *prop {
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subclass::Property("location", ..) => {
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let settings = self.settings.lock().unwrap();
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let location = settings.location.as_ref().map(Url::to_string);
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Ok(location.to_value())
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}
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_ => unimplemented!(),
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}
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}
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fn constructed(&self, obj: &glib::Object) {
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self.parent_constructed(obj);
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let element = obj.downcast_ref::<gst_base::BaseSrc>().unwrap();
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element.set_format(gst::Format::Bytes);
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}
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}
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impl ElementImpl for HttpSrc {}
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impl BaseSrcImpl for HttpSrc {
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fn is_seekable(&self, _src: &gst_base::BaseSrc) -> bool {
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match *self.state.lock().unwrap() {
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State::Started { seekable, .. } => seekable,
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_ => false,
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}
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}
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fn get_size(&self, _src: &gst_base::BaseSrc) -> Option<u64> {
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match *self.state.lock().unwrap() {
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State::Started { size, .. } => size,
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_ => None,
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}
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}
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fn start(&self, src: &gst_base::BaseSrc) -> Result<(), gst::ErrorMessage> {
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let mut state = self.state.lock().unwrap();
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*state = State::Stopped;
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let uri = self
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.settings
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.lock()
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.unwrap()
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.location
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.as_ref()
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.ok_or_else(|| {
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gst_error_msg!(gst::CoreError::StateChange, ["Can't start without an URI"])
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})
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.map(|uri| uri.clone())?;
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*state = self.do_request(src, uri, 0, None)?;
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Ok(())
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}
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fn stop(&self, _src: &gst_base::BaseSrc) -> Result<(), gst::ErrorMessage> {
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*self.state.lock().unwrap() = State::Stopped;
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Ok(())
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}
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fn do_seek(&self, src: &gst_base::BaseSrc, segment: &mut gst::Segment) -> bool {
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let segment = segment.downcast_mut::<gst::format::Bytes>().unwrap();
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let mut state = self.state.lock().unwrap();
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let (position, old_stop, uri) = match *state {
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State::Started {
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position,
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stop,
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ref uri,
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..
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} => (position, stop, uri.clone()),
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State::Stopped => {
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gst_element_error!(src, gst::LibraryError::Failed, ["Not started yet"]);
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return false;
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}
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};
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let start = segment.get_start().expect("No start position given");
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let stop = segment.get_stop();
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if position == start && old_stop == stop.0 {
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return true;
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}
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*state = State::Stopped;
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match self.do_request(src, uri, start, stop.0) {
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Ok(s) => {
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*state = s;
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true
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}
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Err(err) => {
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src.post_error_message(&err);
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false
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}
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}
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}
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fn fill(
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&self,
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src: &gst_base::BaseSrc,
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offset: u64,
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_: u32,
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buffer: &mut gst::BufferRef,
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) -> Result<gst::FlowSuccess, gst::FlowError> {
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let mut state = self.state.lock().unwrap();
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let (response, position) = match *state {
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State::Started {
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ref mut response,
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ref mut position,
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..
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} => (response, position),
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State::Stopped => {
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gst_element_error!(src, gst::LibraryError::Failed, ["Not started yet"]);
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return Err(gst::FlowError::Error);
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}
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};
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if *position != offset {
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gst_element_error!(
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src,
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gst::ResourceError::Seek,
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["Got unexpected offset {}, expected {}", offset, position]
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);
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return Err(gst::FlowError::Error);
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}
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let size = {
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let mut map = buffer.map_writable().ok_or_else(|| {
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gst_element_error!(src, gst::LibraryError::Failed, ["Failed to map buffer"]);
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gst::FlowError::Error
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})?;
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let data = map.as_mut_slice();
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response.read(data).map_err(|err| {
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gst_error!(self.cat, obj: src, "Failed to read: {:?}", err);
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gst_element_error!(
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src,
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gst::ResourceError::Read,
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["Failed to read at {}: {}", offset, err.to_string()]
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);
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gst::FlowError::Error
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})?
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};
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if size == 0 {
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return Err(gst::FlowError::Eos);
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}
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*position += size as u64;
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buffer.set_size(size);
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Ok(gst::FlowSuccess::Ok)
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}
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}
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impl URIHandlerImpl for HttpSrc {
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fn get_uri(&self, _element: &gst::URIHandler) -> Option<String> {
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let settings = self.settings.lock().unwrap();
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settings.location.as_ref().map(Url::to_string)
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}
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fn set_uri(&self, element: &gst::URIHandler, uri: &str) -> Result<(), glib::Error> {
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let element = element.dynamic_cast_ref::<gst_base::BaseSrc>().unwrap();
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self.set_location(&element, uri)
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}
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fn get_uri_type() -> gst::URIType {
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gst::URIType::Src
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}
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fn get_protocols() -> Vec<String> {
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vec!["http".to_string(), "https".to_string()]
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}
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}
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impl ObjectSubclass for HttpSrc {
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const NAME: &'static str = "RsHttpSrc";
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type ParentType = gst_base::BaseSrc;
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type Instance = gst::subclass::ElementInstanceStruct<Self>;
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type Class = subclass::simple::ClassStruct<Self>;
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glib_object_subclass!();
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fn new() -> Self {
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Self {
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cat: gst::DebugCategory::new(
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"rshttpsrc",
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gst::DebugColorFlags::empty(),
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Some("Rust HTTP source"),
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),
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client: Client::new(),
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settings: Mutex::new(Default::default()),
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state: Mutex::new(Default::default()),
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}
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}
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fn type_init(type_: &mut subclass::InitializingType<Self>) {
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type_.add_interface::<gst::URIHandler>();
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}
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fn class_init(klass: &mut subclass::simple::ClassStruct<Self>) {
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klass.set_metadata(
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"HTTP Source",
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"Source/Network/HTTP",
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"Read stream from an HTTP/HTTPS location",
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"Sebastian Dröge <sebastian@centricular.com>",
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);
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let caps = gst::Caps::new_any();
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let src_pad_template = gst::PadTemplate::new(
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"src",
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gst::PadDirection::Src,
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gst::PadPresence::Always,
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&caps,
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)
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.unwrap();
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klass.add_pad_template(src_pad_template);
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klass.install_properties(&PROPERTIES);
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}
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}
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pub fn register(plugin: &gst::Plugin) -> Result<(), glib::BoolError> {
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gst::Element::register(
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Some(plugin),
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"rshttpsrc",
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gst::Rank::Marginal,
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HttpSrc::get_type(),
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)
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}
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