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|
use std::io::Read;
use std::process::{Command, Stdio};
use std::thread;
use std::time::{Duration, Instant};
use ash::vk;
use wgsl_view::{ffmpeg, gpu};
fn main() {
env_logger::init();
let args: Vec<String> = std::env::args().skip(1).collect();
let sep = args.iter().position(|a| a == "--");
let (own_args, ff_args) = match sep {
Some(i) => (&args[..i], &args[i + 1..]),
None => {
eprintln!("usage: tsv-video-stream [--name NAME] -- <ffmpeg input args>");
std::process::exit(1);
}
};
let mut name = "tsv-video-stream".to_string();
let mut i = 0;
while i < own_args.len() {
match own_args[i].as_str() {
"--name" => {
name = own_args[i + 1].clone();
i += 2;
}
other => panic!("unknown argument: {other}"),
}
}
let info = ffmpeg::probe_video(ff_args, None);
log::info!(
"{}x{} @ {:.2}fps, tsv image: {name}",
info.width,
info.height,
info.fps
);
let instance = gpu::create_instance();
let adapter = gpu::create_adapter(&instance, None);
let (device, queue) = gpu::create_device(&adapter);
let mut client = gpu::create_tsv_client(&device);
client
.init_image(
&name,
info.width,
info.height,
1,
gpu::ImgFormat::R8G8B8A8,
gpu::ImgType::D2,
true,
)
.expect("init tsv image");
let fence = gpu::create_fence(&client);
let texture = device.create_texture(&wgpu::TextureDescriptor {
label: Some("video_frame"),
size: wgpu::Extent3d {
width: info.width,
height: info.height,
depth_or_array_layers: 1,
},
mip_level_count: 1,
sample_count: 1,
dimension: wgpu::TextureDimension::D2,
format: wgpu::TextureFormat::Rgba8Unorm,
usage: wgpu::TextureUsages::COPY_DST | wgpu::TextureUsages::COPY_SRC,
view_formats: &[],
});
let frame_size = (info.width * info.height * 4) as usize;
let frame_time = Duration::from_secs_f64(1.0 / info.fps);
let mut ffmpeg = Command::new("ffmpeg")
.args(["-v", "quiet"])
.args(ff_args)
.args(["-f", "rawvideo", "-pix_fmt", "rgba", "pipe:1"])
.stdout(Stdio::piped())
.stderr(Stdio::inherit())
.spawn()
.expect("failed to start ffmpeg");
let stdout = ffmpeg.stdout.take().unwrap();
let mut reader = std::io::BufReader::new(stdout);
let mut frame_buf = vec![0u8; frame_size];
loop {
let frame_start = Instant::now();
if reader.read_exact(&mut frame_buf).is_err() {
break;
}
queue.write_texture(
wgpu::TexelCopyTextureInfo {
texture: &texture,
mip_level: 0,
origin: wgpu::Origin3d::ZERO,
aspect: wgpu::TextureAspect::All,
},
&frame_buf,
wgpu::TexelCopyBufferLayout {
offset: 0,
bytes_per_row: Some(info.width * 4),
rows_per_image: None,
},
wgpu::Extent3d {
width: info.width,
height: info.height,
depth_or_array_layers: 1,
},
);
// flush the pending write_texture command and wait for GPU completion
queue.submit([]);
device.poll(wgpu::PollType::wait_indefinitely()).unwrap();
let raw = unsafe { gpu::raw_image(&texture) };
if let Err(e) = client.send_image(
&name,
raw,
vk::ImageLayout::TRANSFER_DST_OPTIMAL,
vk::ImageLayout::TRANSFER_DST_OPTIMAL,
fence,
) {
log::warn!("send_image error: {e}");
}
let elapsed = frame_start.elapsed();
if elapsed < frame_time {
thread::sleep(frame_time - elapsed);
}
}
ffmpeg.wait().ok();
}
|
