mirrors/gstreamer-rs
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examples: add vulkan video filter example

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Matthew Waters 2024-06-03 00:28:53 +10:00 committed by Hanna Weiß
parent 5440e8ac1c
commit 04b8a0cf71
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10
examples/Cargo.toml
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@ -25,6 +25,9 @@ gst-rtsp = { workspace = true, optional = true }
gst-rtsp-server = { workspace = true, optional = true }
gst-allocators = { workspace = true, optional = true }
gst-d3d12 = { workspace = true, optional = true }
gst-vulkan = { workspace = true, optional = true }
gst-vulkan-wayland = { workspace = true, optional = true }
gst-vulkan-xcb = { workspace = true, optional = true }
gio = { workspace = true, optional = true }
anyhow = "1.0"
byte-slice-cast = "1"
@ -81,6 +84,9 @@ gst-gl-egl = ["dep:gst-gl-egl", "glutin-winit?/egl", "glutin-winit?/x11", "gluti
allocators = ["gst-allocators", "memmap2", "memfd", "uds"]
windows = ["dep:windows"]
d3d12 = ["dep:gst-d3d12", "windows"]
vulkan = ["dep:gst-vulkan", "gst-vulkan/v1_26"]
gst-vulkan-xcb = ["vulkan", "dep:gst-vulkan-xcb"]
gst-vulkan-wayland = ["vulkan", "dep:gst-vulkan-wayland"]
[[bin]]
name = "appsink"
@ -228,3 +234,7 @@ required-features = ["gst-video/v1_18"]
[[bin]]
name = "d3d12convert"
required-features = ["d3d12"]
[[bin]]
name = "vulkanfilter"
required-features = ["vulkan", "gst-vulkan/v1_26_4"]

587
examples/src/bin/vulkanfilter.rs Normal file
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@ -0,0 +1,587 @@
#![allow(clippy::non_send_fields_in_send_ty)]
use anyhow::Error;
use derive_more::{Display, Error};
use gst::prelude::*;
#[path = "../examples-common.rs"]
pub mod examples_common;
#[derive(Debug, Display, Error)]
#[display("Received error from {src}: {error} (debug: {debug:?})")]
struct ErrorMessage {
src: glib::GString,
error: glib::Error,
debug: Option<glib::GString>,
}
mod mirror {
use gst_base::subclass::*;
use gst_vulkan::prelude::*;
use gst_vulkan::subclass::prelude::*;
use std::sync::LazyLock;
pub static CAT: LazyLock<gst::DebugCategory> = LazyLock::new(|| {
gst::DebugCategory::new(
"rsvulkanmirrorfilter",
gst::DebugColorFlags::empty(),
Some("Rust Vulkan Mirror Filter"),
)
});
glib::wrapper! {
pub struct VulkanMirrorFilter(ObjectSubclass<imp::VulkanMirrorFilter>) @extends gst_vulkan::VulkanVideoFilter, gst_base::BaseTransform, gst::Element, gst::Object;
}
impl VulkanMirrorFilter {
pub fn new(name: Option<&str>) -> Self {
glib::Object::builder().property("name", name).build()
}
}
mod imp {
use super::*;
use std::sync::{Arc, Mutex};
static FRAGMENT_SPIRV: [u8; 2240] = [
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/// Private data consists of the transformation shader which is compiled
/// in advance to running the actual filter.
#[derive(Default)]
pub struct VulkanMirrorFilter {
state: Arc<Mutex<State>>,
}
#[derive(Debug, Default)]
struct State {
render: Option<gst_vulkan::VulkanFullScreenQuad>,
}
// See `subclass.rs` for general documentation on creating a subclass. Extended
// information like element metadata have been omitted for brevity.
#[glib::object_subclass]
impl ObjectSubclass for VulkanMirrorFilter {
const NAME: &'static str = "RsVulkanMirrorFilter";
type Type = super::VulkanMirrorFilter;
type ParentType = gst_vulkan::VulkanVideoFilter;
}
impl ElementImpl for VulkanMirrorFilter {
fn pad_templates() -> &'static [gst::PadTemplate] {
static PAD_TEMPLATES: std::sync::OnceLock<Vec<gst::PadTemplate>> =
std::sync::OnceLock::new();
PAD_TEMPLATES.get_or_init(|| {
let caps = gst::Caps::builder_full()
.structure_with_features(
gst::Structure::builder("video/x-raw")
.field("format", gst::List::new(["BGRA", "RGBA"]))
.field("width", gst::IntRange::new(1, i32::MAX))
.field("height", gst::IntRange::new(1, i32::MAX))
.build(),
gst_vulkan::CAPS_FEATURES_MEMORY_VULKAN_IMAGE.clone(),
)
.build();
vec![
gst::PadTemplate::new(
"src",
gst::PadDirection::Src,
gst::PadPresence::Always,
&caps,
)
.unwrap(),
gst::PadTemplate::new(
"sink",
gst::PadDirection::Sink,
gst::PadPresence::Always,
&caps,
)
.unwrap(),
]
})
}
}
impl GstObjectImpl for VulkanMirrorFilter {}
impl ObjectImpl for VulkanMirrorFilter {}
impl VulkanVideoFilterImpl for VulkanMirrorFilter {}
impl BaseTransformImpl for VulkanMirrorFilter {
const MODE: BaseTransformMode = BaseTransformMode::NeverInPlace;
const PASSTHROUGH_ON_SAME_CAPS: bool = false;
const TRANSFORM_IP_ON_PASSTHROUGH: bool = false;
fn start(&self) -> Result<(), gst::ErrorMessage> {
self.parent_start()?;
let queue = self.obj().queue().ok_or_else(|| {
gst::error_msg!(gst::ResourceError::NotFound, ("No Vulkan Queue!"))
})?;
let device = queue.device().ok_or_else(|| {
gst::error_msg!(gst::ResourceError::NotFound, ("No Vulkan Device!"))
})?;
let render = gst_vulkan::VulkanFullScreenQuad::new(&queue);
let vertex = device.create_shader(VERTEX_SPIRV).map_err(|e| {
gst::error_msg!(
gst::ResourceError::NotFound,
("Vertex shader creation failed {e:?}")
)
})?;
let fragment = device.create_shader(FRAGMENT_SPIRV).map_err(|e| {
gst::error_msg!(
gst::ResourceError::NotFound,
("Fragment shader creation failed {e:?}")
)
})?;
if !render.set_shaders(&vertex, &fragment) {
return Err(gst::error_msg!(
gst::ResourceError::Failed,
("Failed to set shaders")
));
}
let mut state = self.state.lock().unwrap();
state.render = Some(render);
Ok(())
}
fn stop(&self) -> Result<(), gst::ErrorMessage> {
self.parent_stop()?;
let mut state = self.state.lock().unwrap();
state.render = None;
Ok(())
}
fn set_caps(
&self,
input: &gst::Caps,
output: &gst::Caps,
) -> Result<(), gst::LoggableError> {
self.parent_set_caps(input, output)
.map_err(|_| gst::loggable_error!(CAT, "parent failed set_caps"))?;
let state = self.state.lock().unwrap();
let render = state
.render
.as_ref()
.ok_or_else(|| gst::loggable_error!(CAT, "No internal renderer!"))?;
let in_info = gst_video::VideoInfo::from_caps(input)
.map_err(|_| gst::loggable_error!(CAT, "Failed to parse input caps"))?;
let out_info = gst_video::VideoInfo::from_caps(input)
.map_err(|_| gst::loggable_error!(CAT, "Failed to parse output caps"))?;
if !render.set_info(&in_info, &out_info) {
return Err(gst::loggable_error!(CAT, "Failed to set caps on renderer"));
}
Ok(())
}
fn transform(
&self,
inbuf: &gst::Buffer,
outbuf: &mut gst::BufferRef,
) -> Result<gst::FlowSuccess, gst::FlowError> {
gst::info!(CAT, "start transform");
let mut state = self.state.lock().unwrap();
let render = state.render.as_mut().ok_or(gst::FlowError::Error)?;
render
.set_input_buffer(Some(inbuf))
.map_err(|_| gst::FlowError::Error)?;
gst::info!(CAT, "start draw");
render.draw_into_output(outbuf).map_err(|e| {
gst::error!(CAT, "Failed to render output: {e:?}");
gst::FlowError::Error
})?;
gst::info!(CAT, "done success");
Ok(gst::FlowSuccess::Ok)
}
}
}
}
fn create_pipeline() -> Result<gst::Pipeline, Error> {
gst::init().unwrap();
let pipeline = gst::Pipeline::new();
let src = gst::ElementFactory::make("videotestsrc").build()?;
let upload = gst::ElementFactory::make("vulkanupload").build()?;
let vulkanfilter = mirror::VulkanMirrorFilter::new(Some("Mirror filter"));
let sink = gst::ElementFactory::make("vulkansink").build()?;
pipeline.add_many([&src, &upload, vulkanfilter.upcast_ref(), &sink])?;
gst::Element::link_many([&src, &upload, vulkanfilter.upcast_ref(), &sink])?;
pipeline.set_state(gst::State::Playing)?;
Ok(pipeline)
}
fn main_loop(pipeline: gst::Pipeline) -> Result<(), Error> {
pipeline.set_state(gst::State::Playing)?;
let bus = pipeline
.bus()
.expect("Pipeline without bus. Shouldn't happen!");
for msg in bus.iter_timed(gst::ClockTime::NONE) {
use gst::MessageView;
match msg.view() {
MessageView::Eos(..) => break,
MessageView::Error(err) => {
pipeline.set_state(gst::State::Null)?;
return Err(ErrorMessage {
src: msg
.src()
.map(|s| s.path_string())
.unwrap_or_else(|| glib::GString::from("UNKNOWN")),
error: err.error(),
debug: err.debug(),
}
.into());
}
_ => (),
}
}
pipeline.set_state(gst::State::Null)?;
Ok(())
}
fn example_main() {
match create_pipeline().and_then(main_loop) {
Ok(r) => r,
Err(e) => eprintln!("Error! {e}"),
}
}
fn main() {
examples_common::run(example_main)
}