mmatt.net
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1use anyhow::{Context, Result};
2use base64::Engine;
3
4#[derive(Debug, Clone)]
5pub struct RgbFrame {
6 pub width: u32,
7 pub height: u32,
8 pub data: Vec<u8>,
9}
10
11pub fn decode_screencast_frame(
12 encoded_data: &str,
13 target_width: u32,
14 target_height: u32,
15) -> Result<RgbFrame> {
16 let bytes = base64::engine::general_purpose::STANDARD
17 .decode(encoded_data)
18 .context("failed to decode CDP frame payload")?;
19
20 let img = image::load_from_memory(&bytes).context("failed to decode image bytes")?;
21 let normalized = if img.width() == target_width && img.height() == target_height {
22 img
23 } else {
24 img.resize_exact(
25 target_width,
26 target_height,
27 image::imageops::FilterType::Triangle,
28 )
29 };
30
31 let rgb = normalized.to_rgb8();
32 Ok(RgbFrame {
33 width: target_width,
34 height: target_height,
35 data: rgb.into_raw(),
36 })
37}