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https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
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120 lines
3.7 KiB
Rust
120 lines
3.7 KiB
Rust
// Copyright (C) 2016 Sebastian Dröge <sebastian@centricular.com>
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// 2016 Luis de Bethencourt <luisbg@osg.samsung.com>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the
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// Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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// Boston, MA 02110-1301, USA.
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use libc::c_char;
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use std::os::raw::c_void;
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use std::ffi::{CStr, CString};
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use std::slice;
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use std::ptr;
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use std::io::Write;
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use url::Url;
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use utils::*;
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#[derive(Debug)]
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pub struct SinkController {
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sink: *mut c_void,
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}
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impl SinkController {
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fn new(sink: *mut c_void) -> SinkController {
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SinkController { sink: sink }
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}
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}
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pub trait Sink: Sync + Send {
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// Called from any thread at any time
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fn set_uri(&mut self, uri: Option<Url>) -> bool;
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fn get_uri(&self) -> Option<Url>;
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// Called from the streaming thread only
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fn start(&mut self) -> bool;
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fn stop(&mut self) -> bool;
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fn render(&mut self, data: &[u8]) -> GstFlowReturn;
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}
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#[no_mangle]
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pub extern "C" fn sink_new(sink: *mut c_void,
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create_instance: fn(controller: SinkController) -> Box<Sink>)
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-> *mut Box<Sink> {
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Box::into_raw(Box::new(create_instance(SinkController::new(sink))))
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}
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#[no_mangle]
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pub extern "C" fn sink_drop(sink: *mut c_void, ptr: *mut Box<Sink>) {
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unsafe { Box::from_raw(ptr) };
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}
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#[no_mangle]
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pub extern "C" fn sink_set_uri(sink: *mut c_void,
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ptr: *mut Box<Sink>,
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uri_ptr: *const c_char)
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-> GBoolean {
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let sink: &mut Box<Sink> = unsafe { &mut *ptr };
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if uri_ptr.is_null() {
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GBoolean::from_bool(sink.set_uri(None))
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} else {
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let uri_str = unsafe { CStr::from_ptr(uri_ptr) }.to_str().unwrap();
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match Url::parse(uri_str) {
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Ok(uri) => GBoolean::from_bool(sink.set_uri(Some(uri))),
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Err(err) => {
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sink.set_uri(None);
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println_err!("Failed to parse URI '{}': {}", uri_str, err);
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GBoolean::False
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}
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}
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}
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}
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#[no_mangle]
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pub extern "C" fn sink_get_uri(sink: *mut c_void, ptr: *const Box<Sink>) -> *mut c_char {
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let sink: &Box<Sink> = unsafe { &*ptr };
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match sink.get_uri() {
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Some(uri) => CString::new(uri.into_string().into_bytes()).unwrap().into_raw(),
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None => ptr::null_mut(),
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}
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}
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#[no_mangle]
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pub extern "C" fn sink_render(sink: *mut c_void,
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ptr: *mut Box<Sink>,
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data_ptr: *const u8,
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data_len: usize)
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-> GstFlowReturn {
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let sink: &mut Box<Sink> = unsafe { &mut *ptr };
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let data = unsafe { slice::from_raw_parts(data_ptr, data_len) };
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sink.render(data)
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}
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#[no_mangle]
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pub extern "C" fn sink_start(sink: *mut c_void, ptr: *mut Box<Sink>) -> GBoolean {
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let sink: &mut Box<Sink> = unsafe { &mut *ptr };
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GBoolean::from_bool(sink.start())
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}
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#[no_mangle]
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pub extern "C" fn sink_stop(sink: *mut c_void, ptr: *mut Box<Sink>) -> GBoolean {
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let sink: &mut Box<Sink> = unsafe { &mut *ptr };
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GBoolean::from_bool(sink.stop())
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}
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