rslibcamlite 0.1.1

Rust wrapper for libcamlite - h264/rgb stream access to rpi cameras
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

# libcamlite-rs
Rust bindings for libcamlite

This crate brings libcamlite support to rust!

Specifically, this adds support for accessing libcamera-supported cameras on the raspberry pi.  It provides a simple, efficient API for getting both the H264 and RGB streams.  The H264 stream can be saved to a file or streamed over, say, RTSP (support not included).  The RGB stream is ideal for passing to an object detection library, such as torch or tflite.

See https://github.com/carsonfenimore/libcamlite-rs-test for an example, which is roughly as follows:

This shows that in a few lines, one can begin writing rust apps that make use of both the h264 and rgb streams.  Its about as simple as:

    let libcam = LibCamClient::new();

    let lowres = StreamParams{ width: 300, height: 300, format: StreamFormat::STREAM_FORMAT_RGB, framerate: 30};
    libcam.client.setupLowres(&lowres);

    let h264Params = StreamParams{ width: 1920, height: 1080, format:  StreamFormat::STREAM_FORMAT_H264, framerate: 30};
    libcam.client.setupH264(&h264Params, 5, &"main".to_owned(), &"2mbps".to_owned());

    let mycb = Box::new(MyCallback::new(lowres));
    libcam.setCallbacks(mycb);
    libcam.run();

You should then see output like the following:

    low: 31 calls in past 1.0325267 seconds; 30.023436 calls/sec
    h264: 31 calls in past 1.0341291 seconds; 29.976913 calls/sec
    Wrote output.ppm
    low: 31 calls in past 1.0325396 seconds; 30.023062 calls/sec
    h264: 30 calls in past 1.0032188 seconds; 29.903748 calls/sec

All in this takes up about 70MB of ram and a load average of 0.5 on a raspberry pi zero 2w, running bullseye aarch64! 

You can view the output.h264 file in VLC.  The PPM should be viewable in any image viewer.