gst-plugins-rs/src/rssink.rs

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// Copyright (C) 2016 Sebastian Dröge <sebastian@centricular.com>
// 2016 Luis de Bethencourt <luisbg@osg.samsung.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 St, Fifth Floor,
// Boston, MA 02110-1301, USA.
use libc::c_char;
use std::os::raw::c_void;
use std::ffi::{CStr, CString};
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use std::slice;
use std::ptr;
use std::io::Write;
use url::Url;
use utils::*;
#[derive(Debug)]
pub struct SinkController {
sink: *mut c_void,
}
impl SinkController {
fn new(sink: *mut c_void) -> SinkController {
SinkController { sink: sink }
}
}
pub trait Sink: Sync + Send {
// Called from any thread at any time
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fn set_uri(&self, uri: Option<Url>) -> bool;
fn get_uri(&self) -> Option<Url>;
// Called from the streaming thread only
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fn start(&self) -> bool;
fn stop(&self) -> bool;
fn render(&self, data: &[u8]) -> GstFlowReturn;
}
#[no_mangle]
pub extern "C" fn sink_new(sink: *mut c_void,
create_instance: fn(controller: SinkController) -> Box<Sink>)
-> *mut Box<Sink> {
Box::into_raw(Box::new(create_instance(SinkController::new(sink))))
}
#[no_mangle]
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pub unsafe extern "C" fn sink_drop(ptr: *mut Box<Sink>) {
Box::from_raw(ptr);
}
#[no_mangle]
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pub unsafe extern "C" fn sink_set_uri(ptr: *mut Box<Sink>, uri_ptr: *const c_char) -> GBoolean {
let sink: &mut Box<Sink> = &mut *ptr;
if uri_ptr.is_null() {
GBoolean::from_bool(sink.set_uri(None))
} else {
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let uri_str = CStr::from_ptr(uri_ptr).to_str().unwrap();
match Url::parse(uri_str) {
Ok(uri) => GBoolean::from_bool(sink.set_uri(Some(uri))),
Err(err) => {
sink.set_uri(None);
println_err!("Failed to parse URI '{}': {}", uri_str, err);
GBoolean::False
}
}
}
}
#[no_mangle]
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pub unsafe extern "C" fn sink_get_uri(ptr: *const Box<Sink>) -> *mut c_char {
let sink: &Box<Sink> = &*ptr;
match sink.get_uri() {
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Some(uri) => CString::new(uri.into_string().into_bytes()).unwrap().into_raw(),
None => ptr::null_mut(),
}
}
#[no_mangle]
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pub unsafe extern "C" fn sink_render(ptr: *mut Box<Sink>,
data_ptr: *const u8,
data_len: usize)
-> GstFlowReturn {
let sink: &mut Box<Sink> = &mut *ptr;
let data = slice::from_raw_parts(data_ptr, data_len);
sink.render(data)
}
#[no_mangle]
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pub unsafe extern "C" fn sink_start(ptr: *mut Box<Sink>) -> GBoolean {
let sink: &mut Box<Sink> = &mut *ptr;
GBoolean::from_bool(sink.start())
}
#[no_mangle]
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pub unsafe extern "C" fn sink_stop(ptr: *mut Box<Sink>) -> GBoolean {
let sink: &mut Box<Sink> = &mut *ptr;
GBoolean::from_bool(sink.stop())
}