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Allow creating buffers from AsRef<[u8]> and AsMut<[u8]>

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Not just from Vec<u8>.
This commit is contained in:
Sebastian Dröge 2017-10-20 18:37:38 +02:00
parent b24f628772
commit 342d89dd44
1 changed files with 41 additions and 12 deletions
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53
gstreamer/src/buffer.rs
View file

@ -64,28 +64,57 @@ impl GstRc<BufferRef> {
}
}
unsafe extern "C" fn vec_drop(vec: glib_ffi::gpointer) {
let vec: Box<Vec<u8>> = Box::from_raw(vec as *mut Vec<u8>);
drop(vec);
unsafe extern "C" fn drop_box<T>(vec: glib_ffi::gpointer) {
let slice: Box<T> = Box::from_raw(vec as *mut T);
drop(slice);
}
pub fn from_vec(vec: Vec<u8>) -> Option<Self> {
pub fn from_mut_slice<T: AsMut<[u8]>>(slice: T) -> Option<Self> {
assert_initialized_main_thread!();
let raw = unsafe {
let mut vec = Box::new(vec);
let maxsize = vec.capacity();
let size = vec.len();
let data = vec.as_mut_ptr();
let user_data = Box::into_raw(vec);
let mut b = Box::new(slice);
let (size, data) = {
let slice = (*b).as_mut();
(slice.len(), slice.as_mut_ptr())
};
let user_data = Box::into_raw(b);
ffi::gst_buffer_new_wrapped_full(
ffi::GstMemoryFlags::empty(),
data as glib_ffi::gpointer,
maxsize,
size,
0,
size,
user_data as glib_ffi::gpointer,
Some(Buffer::vec_drop),
Some(Self::drop_box::<T>),
)
};
if raw.is_null() {
None
} else {
Some(unsafe { from_glib_full(raw) })
}
}
pub fn from_slice<T: AsRef<[u8]>>(slice: T) -> Option<Self> {
assert_initialized_main_thread!();
let raw = unsafe {
let b = Box::new(slice);
let (size, data) = {
let slice = (*b).as_ref();
(slice.len(), slice.as_ptr())
};
let user_data = Box::into_raw(b);
ffi::gst_buffer_new_wrapped_full(
ffi::GST_MEMORY_FLAG_READONLY,
data as glib_ffi::gpointer,
size,
0,
size,
user_data as glib_ffi::gpointer,
Some(Self::drop_box::<T>),
)
};
@ -462,7 +491,7 @@ mod tests {
fn test_writability() {
::init().unwrap();
let mut buffer = Buffer::from_vec(vec![1, 2, 3, 4]).unwrap();
let mut buffer = Buffer::from_slice(vec![1, 2, 3, 4]).unwrap();
{
let data = buffer.map_readable().unwrap();
assert_eq!(data.as_slice(), vec![1, 2, 3, 4].as_slice());