gstreamer-rs/gstreamer-app/src/app_src.rs
François Laignel 948fb2ae4b Replace XXXReturn with Result<XXXSuccess, XXXError>
... in function signatures.

These breaking changes aim at improving usability by allowing users
to take advantage of Rust error management features sur as `ok_or`,
`map_err`, `expect` and the `?` operator. See the `examples` and
`tutorials` to get an idea of the impacts.
2019-01-11 18:33:04 +01:00

215 lines
6.5 KiB
Rust

// Copyright (C) 2017 Sebastian Dröge <sebastian@centricular.com>
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use ffi;
use glib::translate::*;
use glib_ffi::{gboolean, gpointer};
use gst;
use std::cell::RefCell;
use std::mem;
use std::ptr;
use AppSrc;
#[cfg_attr(feature = "cargo-clippy", allow(type_complexity))]
pub struct AppSrcCallbacks {
need_data: Option<RefCell<Box<FnMut(&AppSrc, u32) + Send + 'static>>>,
enough_data: Option<Box<Fn(&AppSrc) + Send + Sync + 'static>>,
seek_data: Option<Box<Fn(&AppSrc, u64) -> bool + Send + Sync + 'static>>,
callbacks: ffi::GstAppSrcCallbacks,
}
unsafe impl Send for AppSrcCallbacks {}
unsafe impl Sync for AppSrcCallbacks {}
impl AppSrcCallbacks {
pub fn new() -> AppSrcCallbacksBuilder {
skip_assert_initialized!();
AppSrcCallbacksBuilder {
need_data: None,
enough_data: None,
seek_data: None,
}
}
}
#[cfg_attr(feature = "cargo-clippy", allow(type_complexity))]
pub struct AppSrcCallbacksBuilder {
need_data: Option<RefCell<Box<FnMut(&AppSrc, u32) + Send + 'static>>>,
enough_data: Option<Box<Fn(&AppSrc) + Send + Sync + 'static>>,
seek_data: Option<Box<Fn(&AppSrc, u64) -> bool + Send + Sync + 'static>>,
}
impl AppSrcCallbacksBuilder {
pub fn need_data<F: FnMut(&AppSrc, u32) + Send + 'static>(self, need_data: F) -> Self {
Self {
need_data: Some(RefCell::new(Box::new(need_data))),
..self
}
}
pub fn enough_data<F: Fn(&AppSrc) + Send + Sync + 'static>(self, enough_data: F) -> Self {
Self {
enough_data: Some(Box::new(enough_data)),
..self
}
}
pub fn seek_data<F: Fn(&AppSrc, u64) -> bool + Send + Sync + 'static>(
self,
seek_data: F,
) -> Self {
Self {
seek_data: Some(Box::new(seek_data)),
..self
}
}
pub fn build(self) -> AppSrcCallbacks {
let have_need_data = self.need_data.is_some();
let have_enough_data = self.enough_data.is_some();
let have_seek_data = self.seek_data.is_some();
AppSrcCallbacks {
need_data: self.need_data,
enough_data: self.enough_data,
seek_data: self.seek_data,
callbacks: ffi::GstAppSrcCallbacks {
need_data: if have_need_data {
Some(trampoline_need_data)
} else {
None
},
enough_data: if have_enough_data {
Some(trampoline_enough_data)
} else {
None
},
seek_data: if have_seek_data {
Some(trampoline_seek_data)
} else {
None
},
_gst_reserved: [
ptr::null_mut(),
ptr::null_mut(),
ptr::null_mut(),
ptr::null_mut(),
],
},
}
}
}
unsafe extern "C" fn trampoline_need_data(
appsrc: *mut ffi::GstAppSrc,
length: u32,
callbacks: gpointer,
) {
let callbacks = &*(callbacks as *const AppSrcCallbacks);
if let Some(ref need_data) = callbacks.need_data {
(&mut *need_data.borrow_mut())(&from_glib_borrow(appsrc), length);
}
}
unsafe extern "C" fn trampoline_enough_data(appsrc: *mut ffi::GstAppSrc, callbacks: gpointer) {
let callbacks = &*(callbacks as *const AppSrcCallbacks);
if let Some(ref enough_data) = callbacks.enough_data {
(*enough_data)(&from_glib_borrow(appsrc));
}
}
unsafe extern "C" fn trampoline_seek_data(
appsrc: *mut ffi::GstAppSrc,
offset: u64,
callbacks: gpointer,
) -> gboolean {
let callbacks = &*(callbacks as *const AppSrcCallbacks);
let ret = if let Some(ref seek_data) = callbacks.seek_data {
(*seek_data)(&from_glib_borrow(appsrc), offset)
} else {
false
};
ret.to_glib()
}
unsafe extern "C" fn destroy_callbacks(ptr: gpointer) {
Box::<AppSrcCallbacks>::from_raw(ptr as *mut _);
}
impl AppSrc {
pub fn end_of_stream(&self) -> Result<gst::FlowSuccess, gst::FlowError> {
let ret: gst::FlowReturn =
unsafe { from_glib(ffi::gst_app_src_end_of_stream(self.to_glib_none().0)) };
ret.into_result()
}
pub fn push_buffer(&self, buffer: gst::Buffer) -> Result<gst::FlowSuccess, gst::FlowError> {
let ret: gst::FlowReturn = unsafe {
from_glib(ffi::gst_app_src_push_buffer(
self.to_glib_none().0,
buffer.into_ptr(),
))
};
ret.into_result()
}
#[cfg(any(feature = "v1_14", feature = "dox"))]
pub fn push_buffer_list(
&self,
list: gst::BufferList,
) -> Result<gst::FlowSuccess, gst::FlowError> {
let ret: gst::FlowReturn = unsafe {
from_glib(ffi::gst_app_src_push_buffer_list(
self.to_glib_none().0,
list.into_ptr(),
))
};
ret.into_result()
}
pub fn push_sample(&self, sample: &gst::Sample) -> Result<gst::FlowSuccess, gst::FlowError> {
let ret: gst::FlowReturn = unsafe {
from_glib(ffi::gst_app_src_push_sample(
self.to_glib_none().0,
sample.to_glib_none().0,
))
};
ret.into_result()
}
pub fn set_callbacks(&self, callbacks: AppSrcCallbacks) {
unsafe {
ffi::gst_app_src_set_callbacks(
self.to_glib_none().0,
mut_override(&callbacks.callbacks),
Box::into_raw(Box::new(callbacks)) as *mut _,
Some(destroy_callbacks),
);
}
}
pub fn set_latency(&self, min: gst::ClockTime, max: gst::ClockTime) {
unsafe {
ffi::gst_app_src_set_latency(self.to_glib_none().0, min.to_glib(), max.to_glib());
}
}
pub fn get_latency(&self) -> (gst::ClockTime, gst::ClockTime) {
unsafe {
let mut min = mem::uninitialized();
let mut max = mem::uninitialized();
ffi::gst_app_src_get_latency(self.to_glib_none().0, &mut min, &mut max);
(from_glib(min), from_glib(max))
}
}
}