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ndi: Add support for loading NDI SDK v6

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The library name and environment variable name have changed but the ABI
is completely compatible.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1607>
This commit is contained in:
Sebastian Dröge 2024-06-06 16:20:43 +03:00 committed by GStreamer Marge Bot
parent 1e964233c6
commit 30252a1b2e
2 changed files with 52 additions and 19 deletions
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6
net/ndi/README.md
View file

@ -1,7 +1,7 @@
GStreamer NDI Plugin
====================
*Compatible with NDI SDK 5.x*
*Compatible with NDI SDK 6.x and 5.x*
This is a plugin for the [GStreamer](https://gstreamer.freedesktop.org/)
multimedia framework that allows GStreamer to receive or send an
@ -16,8 +16,8 @@ sink element to provide an NDI source and a device provider for discovering
NDI sources on the network.
The plugin is loading the NDI SDK at runtime, either from the default library
path or, if set, from the directory given by the `NDI_RUNTIME_DIR_V5`
environment variable.
path or, if set, from the directory given by the `NDI_RUNTIME_DIR_V6` or
`NDI_RUNTIME_DIR_V5` environment variables.
Some examples of how to use these elements from the command line:

65
net/ndi/src/ndisys.rs
View file

@ -8,7 +8,7 @@
clippy::missing_safety_doc
)]
use once_cell::sync::OnceCell;
use once_cell::sync::{Lazy, OnceCell};
#[cfg(unix)]
use libloading::os::unix::{Library, Symbol};
@ -16,15 +16,15 @@ use libloading::os::unix::{Library, Symbol};
use libloading::os::windows::{Library, Symbol};
#[cfg(all(target_arch = "x86_64", target_os = "windows"))]
const LIBRARY_NAME: &str = "Processing.NDI.Lib.x64.dll";
const LIBRARY_NAMES: &[&str] = &["Processing.NDI.Lib.x64.dll"];
#[cfg(all(target_arch = "x86", target_os = "windows"))]
const LIBRARY_NAME: &str = "Processing.NDI.Lib.x86.dll";
const LIBRARY_NAMES: &[&str] = &["Processing.NDI.Lib.x86.dll"];
#[cfg(target_os = "linux")]
const LIBRARY_NAME: &str = "libndi.so.5";
const LIBRARY_NAMES: &[&str] = &["libndi.so.6", "libndi.so.5"];
#[cfg(target_os = "macos")]
const LIBRARY_NAME: &str = "libndi.dylib";
const LIBRARY_NAMES: &[&str] = &["libndi.dylib"];
#[cfg(all(unix, not(any(target_os = "linux", target_os = "macos"))))]
const LIBRARY_NAME: &str = "libndi.so";
const LIBRARY_NAMES: &[&str] = &["libndi.so"];
#[allow(clippy::type_complexity)]
struct FFI {
@ -326,6 +326,9 @@ pub const NDIlib_compressed_packet_flags_keyframe: u32 = 1;
#[cfg(feature = "advanced-sdk")]
pub const NDIlib_compressed_packet_version_0: u32 = 44;
static CAT: Lazy<gst::DebugCategory> =
Lazy::new(|| gst::DebugCategory::new("ndi", gst::DebugColorFlags::empty(), Some("NewTek NDI")));
static FFI: OnceCell<FFI> = OnceCell::new();
pub fn load() -> Result<(), glib::BoolError> {
@ -335,17 +338,47 @@ pub fn load() -> Result<(), glib::BoolError> {
use std::env;
use std::path;
let library_directory = env::var_os("NDI_RUNTIME_DIR_V5");
let library_path = if let Some(library_directory) = library_directory {
let mut path = path::PathBuf::from(library_directory);
path.push(LIBRARY_NAME);
path
} else {
path::PathBuf::from(LIBRARY_NAME)
};
const ENV_VARS: &[&str] = &["NDI_RUNTIME_DIR_V6", "NDI_RUNTIME_DIR_V5", ""];
let library = Library::new(library_path)
.map_err(|err| glib::bool_error!("Failed to load NDI SDK: {}", err))?;
let mut library = None;
'outer_loop: for env_var in ENV_VARS {
let library_directory = if !env_var.is_empty() {
let Some(library_directory) = env::var_os(env_var) else {
continue;
};
Some(library_directory)
} else {
None
};
for library_name in LIBRARY_NAMES {
let library_path = if let Some(ref library_directory) = library_directory {
let mut path = path::PathBuf::from(library_directory);
path.push(library_name);
path
} else {
path::PathBuf::from(library_name)
};
match Library::new(&library_path) {
Ok(lib) => {
gst::log!(CAT, "Loaded NDI SDK from {}", library_path.display());
library = Some(lib);
break 'outer_loop;
}
Err(err) => {
gst::log!(
CAT,
"Failed loading NDI SDK from {}: {err}",
library_path.display()
);
continue;
}
}
}
}
let library = library.ok_or_else(|| glib::bool_error!("Failed loading NDI SDK"))?;
macro_rules! load_symbol {
($name:ident) => {{