gst-plugins-rs/src/rssource.rs

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Rust
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2016-05-15 15:54:09 +00:00
// Copyright (C) 2016 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 St, Fifth Floor,
// Boston, MA 02110-1301, USA.
use libc::c_char;
use std::ffi::{CStr, CString};
use std::slice;
use std::ptr;
use utils::*;
pub trait Source: Sync + Send {
fn set_uri(&mut self, uri_str: Option<&str>) -> bool;
fn get_uri(&self) -> Option<String>;
fn is_seekable(&self) -> bool;
fn get_size(&self) -> u64;
fn start(&mut self) -> bool;
fn stop(&mut self) -> bool;
fn fill(&mut self, offset: u64, data: &mut [u8]) -> Result<usize, GstFlowReturn>;
fn do_seek(&mut self, start: u64, stop: u64) -> bool;
}
#[no_mangle]
pub extern "C" fn source_drop(ptr: *mut Box<Source>) {
unsafe { Box::from_raw(ptr) };
}
#[no_mangle]
pub extern "C" fn source_set_uri(ptr: *mut Box<Source>, uri_ptr: *const c_char) -> GBoolean{
let source: &mut Box<Source> = unsafe { &mut *ptr };
if uri_ptr.is_null() {
GBoolean::from_bool(source.set_uri(None))
} else {
let uri = unsafe { CStr::from_ptr(uri_ptr) };
GBoolean::from_bool(source.set_uri(Some(uri.to_str().unwrap())))
}
}
#[no_mangle]
pub extern "C" fn source_get_uri(ptr: *mut Box<Source>) -> *mut c_char {
let source: &mut Box<Source> = unsafe { &mut *ptr };
match source.get_uri() {
Some(uri) =>
CString::new(uri.into_bytes()).unwrap().into_raw(),
None =>
ptr::null_mut()
}
}
#[no_mangle]
pub extern "C" fn source_fill(ptr: *mut Box<Source>, offset: u64, data_ptr: *mut u8, data_len_ptr: *mut usize) -> GstFlowReturn {
let source: &mut Box<Source> = unsafe { &mut *ptr };
let mut data_len: &mut usize = unsafe { &mut *data_len_ptr };
let mut data = unsafe { slice::from_raw_parts_mut(data_ptr, *data_len) };
match source.fill(offset, data) {
Ok(actual_len) => {
*data_len = actual_len;
GstFlowReturn::Ok
},
Err(ret) => ret,
}
}
#[no_mangle]
pub extern "C" fn source_get_size(ptr: *const Box<Source>) -> u64 {
let source: &Box<Source> = unsafe { & *ptr };
return source.get_size();
}
#[no_mangle]
pub extern "C" fn source_start(ptr: *mut Box<Source>) -> GBoolean {
let source: &mut Box<Source> = unsafe { &mut *ptr };
GBoolean::from_bool(source.start())
}
#[no_mangle]
pub extern "C" fn source_stop(ptr: *mut Box<Source>) -> GBoolean {
let source: &mut Box<Source> = unsafe { &mut *ptr };
GBoolean::from_bool(source.stop())
}
#[no_mangle]
pub extern "C" fn source_is_seekable(ptr: *const Box<Source>) -> GBoolean {
let source: &Box<Source> = unsafe { & *ptr };
GBoolean::from_bool(source.is_seekable())
}
#[no_mangle]
pub extern "C" fn source_do_seek(ptr: *mut Box<Source>, start: u64, stop: u64) -> GBoolean {
let source: &mut Box<Source> = unsafe { &mut *ptr };
GBoolean::from_bool(source.do_seek(start, stop))
}