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rtp/rtpbuffer: Work on &BufferRef / &mut BufferRef instead of &Buffer / &mut Buffer

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The buffer, in the writable case, needs to be actually writable (i.e.
refcount 1) and this was previously not ensured.

Also it caused some API mismatch when trying to use it e.g. as part of
basetransform's `transform_ip()` virtual method.

Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/issues/162
This commit is contained in:
Sebastian Dröge 2021-09-08 09:29:05 +03:00
parent a208919c88
commit a3a7f85f7f
1 changed files with 57 additions and 49 deletions
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44
gstreamer-rtp/src/rtp_buffer.rs
View file

@ -1,6 +1,6 @@
// Take a look at the license at the top of the repository in the LICENSE file.
use glib::translate::{from_glib, FromGlibPtrFull, IntoGlib};
use glib::translate::{from_glib, mut_override, FromGlibPtrFull, IntoGlib};
use std::fmt;
use std::marker::PhantomData;
use std::mem;
@ -12,8 +12,7 @@ pub enum Writable {}
pub struct RTPBuffer<'a, T> {
rtp_buffer: ffi::GstRTPBuffer,
buffer: &'a gst::Buffer,
phantom: PhantomData<T>,
phantom: PhantomData<&'a T>,
}
unsafe impl<'a, T> Send for RTPBuffer<'a, T> {}
@ -23,21 +22,19 @@ impl<'a, T> fmt::Debug for RTPBuffer<'a, T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("RTPBuffer")
.field("rtp_buffer", &self.rtp_buffer)
.field("buffer", &self.buffer)
.field("phantom", &self.phantom)
.finish()
}
}
impl<'a> RTPBuffer<'a, Readable> {
pub fn from_buffer_readable(
buffer: &gst::Buffer,
buffer: &'a gst::BufferRef,
) -> Result<RTPBuffer<Readable>, glib::BoolError> {
skip_assert_initialized!();
unsafe {
let mut rtp_buffer = mem::MaybeUninit::zeroed();
let res: bool = from_glib(ffi::gst_rtp_buffer_map(
buffer.as_mut_ptr(),
mut_override(buffer.as_ptr()),
gst::ffi::GST_MAP_READ,
rtp_buffer.as_mut_ptr(),
));
@ -45,7 +42,6 @@ impl<'a> RTPBuffer<'a, Readable> {
if res {
Ok(RTPBuffer {
rtp_buffer: rtp_buffer.assume_init(),
buffer,
phantom: PhantomData,
})
} else {
@ -57,7 +53,7 @@ impl<'a> RTPBuffer<'a, Readable> {
impl<'a> RTPBuffer<'a, Writable> {
pub fn from_buffer_writable(
buffer: &mut gst::Buffer,
buffer: &'a mut gst::BufferRef,
) -> Result<RTPBuffer<Writable>, glib::BoolError> {
skip_assert_initialized!();
unsafe {
@ -71,7 +67,6 @@ impl<'a> RTPBuffer<'a, Writable> {
if res {
Ok(RTPBuffer {
rtp_buffer: rtp_buffer.assume_init(),
buffer,
phantom: PhantomData,
})
} else {
@ -394,7 +389,9 @@ mod tests {
let csrc_count = 2;
let payload_size = 16;
let mut buffer = gst::Buffer::new_rtp_with_sizes(payload_size, 4, csrc_count).unwrap();
let mut rtp_buffer = RTPBuffer::from_buffer_writable(&mut buffer).unwrap();
{
let buffer = buffer.get_mut().unwrap();
let mut rtp_buffer = RTPBuffer::from_buffer_writable(buffer).unwrap();
rtp_buffer.set_seq(42);
assert_eq!(rtp_buffer.seq(), 42);
@ -429,6 +426,7 @@ mod tests {
assert_eq!(rtp_buffer.extension_bytes(), None);
}
}
#[test]
fn test_empty_payload() {
@ -449,15 +447,19 @@ mod tests {
fn test_extension_header_onebyte() {
gst::init().unwrap();
let extension_data: [u8; 4] = [100, 101, 102, 103];
let mut buffer = gst::Buffer::new_rtp_with_sizes(16, 4, 0).unwrap();
let mut rtp_buffer = RTPBuffer::from_buffer_writable(&mut buffer).unwrap();
{
let buffer = buffer.get_mut().unwrap();
let mut rtp_buffer = RTPBuffer::from_buffer_writable(buffer).unwrap();
assert_eq!(rtp_buffer.extension_bytes(), None);
let extension_data: [u8; 4] = [100, 101, 102, 103];
let result = rtp_buffer.add_extension_onebyte_header(1, &extension_data);
assert!(result.is_ok());
}
let rtp_buffer = RTPBuffer::from_buffer_readable(&buffer).unwrap();
let bytes_option = rtp_buffer.extension_bytes();
assert!(bytes_option.is_some());
let (bits, bytes) = bytes_option.unwrap();
@ -487,16 +489,22 @@ mod tests {
fn test_extension_header_twobytes() {
gst::init().unwrap();
let mut buffer = gst::Buffer::new_rtp_with_sizes(16, 4, 0).unwrap();
let mut rtp_buffer = RTPBuffer::from_buffer_writable(&mut buffer).unwrap();
assert_eq!(rtp_buffer.extension_bytes(), None);
let extension_data: [u8; 4] = [100, 101, 102, 103];
let appbits = 5;
let id = 1;
let mut buffer = gst::Buffer::new_rtp_with_sizes(16, 4, 0).unwrap();
{
let buffer = buffer.get_mut().unwrap();
let mut rtp_buffer = RTPBuffer::from_buffer_writable(buffer).unwrap();
assert_eq!(rtp_buffer.extension_bytes(), None);
let result = rtp_buffer.add_extension_twobytes_header(appbits, id, &extension_data);
assert!(result.is_ok());
}
let rtp_buffer = RTPBuffer::from_buffer_readable(&buffer).unwrap();
let bytes_option = rtp_buffer.extension_bytes();
assert!(bytes_option.is_some());