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Use gstreamer-video API in appsrc example and make frame generation a bit more efficient

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This commit is contained in:
Sebastian Dröge 2017-08-11 17:59:05 +03:00
parent b655c838b2
commit b392c82ba9
3 changed files with 24 additions and 19 deletions
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1
Cargo.lock generated
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@ -114,6 +114,7 @@ dependencies = [
"gstreamer-app 0.1.0",
"gstreamer-audio 0.1.0",
"gstreamer-player 0.1.0",
"gstreamer-video 0.1.0",
"gtk 0.1.3 (git+https://github.com/gtk-rs/gtk)",
"send-cell 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
"tokio-core 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",

1
examples/Cargo.toml
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@ -8,6 +8,7 @@ glib = { version = "0.1.3", git = "https://github.com/gtk-rs/glib" }
gstreamer = { path = "../gstreamer" }
gstreamer-app = { path = "../gstreamer-app" }
gstreamer-audio = { path = "../gstreamer-audio" }
gstreamer-video = { path = "../gstreamer-video" }
gstreamer-player = { path = "../gstreamer-player", optional = true }
gtk = { version = "0.1.3", git = "https://github.com/gtk-rs/gtk", features = ["v3_6"] }
gio = { version = "0.1.3", git = "https://github.com/gtk-rs/gio" }

41
examples/src/bin/appsrc.rs
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@ -2,6 +2,7 @@ extern crate gstreamer as gst;
use gst::*;
extern crate gstreamer_app as gst_app;
use gst_app::*;
extern crate gstreamer_video as gst_video;
extern crate glib;
@ -30,15 +31,13 @@ fn create_pipeline() -> Result<(Pipeline, AppSrc), utils::ExampleError> {
let appsrc = src.clone()
.dynamic_cast::<AppSrc>()
.expect("Source element is expected to be an appsrc!");
appsrc.set_caps(&Caps::new_simple(
"video/x-raw",
&[
("format", &"BGRx"),
("width", &(WIDTH as i32)),
("height", &(HEIGHT as i32)),
("framerate", &Fraction::new(2, 1)),
],
));
let info = gst_video::VideoInfo::new(gst_video::VideoFormat::Bgrx, WIDTH as u32, HEIGHT as u32)
.fps(Fraction::new(2, 1))
.build()
.unwrap();
appsrc.set_caps(&info.to_caps().unwrap());
appsrc.set_property_format(Format::Time);
appsrc.set_max_bytes(1);
appsrc.set_property_block(true);
@ -53,21 +52,25 @@ fn main_loop() -> Result<(), utils::ExampleError> {
for i in 0..100 {
println!("Producing frame {}", i);
// TODO: This is not very efficient
let mut vec = Vec::with_capacity(WIDTH * HEIGHT * 4);
let r = if i % 2 == 0 { 0 } else { 255 };
let g = if i % 3 == 0 { 0 } else { 255 };
let b = if i % 5 == 0 { 0 } else { 255 };
for _ in 0..(WIDTH * HEIGHT) {
vec.push(b);
vec.push(g);
vec.push(r);
vec.push(0);
}
let mut buffer = gst::Buffer::with_size(WIDTH * HEIGHT * 4).unwrap();
{
let buffer = buffer.get_mut().unwrap();
buffer.set_pts(i * 500_000_000);
let mut buffer = Buffer::from_vec(vec).expect("Unable to create a Buffer");
buffer.get_mut().unwrap().set_pts(i * 500_000_000);
let mut data = buffer.map_writable().unwrap();
for p in data.as_mut_slice().chunks_mut(4) {
assert_eq!(p.len(), 4);
p[0] = b;
p[1] = g;
p[2] = r;
p[3] = 0;
}
}
if appsrc.push_buffer(buffer) != FlowReturn::Ok {
break;