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Harshit-Dhanwalkar 2026-06-17 15:54:08 +05:30
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@ -56,3 +56,7 @@ dkms.conf
# debug information files
*.dwo
# LSP
C/compile_commands.json
C/.cache/

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README.md
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@ -14,15 +14,24 @@ Real-time ASCII video from your webcam in the terminal - pure C99, no heavy runt
| Feature | Details |
| ------------------------- | ------------------------------------------------------------------------------------- |
| YUYV to grayscale | SSE2 SIMD (`yuyv_to_gray_simd`) - 16 pixels per iteration |
| YUYV to RGB | Fixed-point BT.601 conversion for truecolor output |
| ASCII rendering | Configurable charset, brightness, contrast, invert |
| Sobel edge detection | L1-norm kernel convolution |
| Floyd-Steinberg dithering | Error-diffusion to reduce banding |
| ANSI truecolor | `\033[38;2;R;G;Bm` per-cell coloring |
| Hot-reload plugin system | `inotify` + `dlopen` - rebuild a filter `.so`, it reloads live |
| FPS-capped render loop | `CLOCK_MONOTONIC` + `nanosleep` frame pacing |
| Producer/consumer threads | Double-buffered capture + render (stubbed in main loop, active in `thread_sharing.c`) |
| **YUYV to grayscale** | SSE2 SIMD (`yuyv_to_gray_simd`) - 16 pixels per iteration on x86_64, NEON on ARM64 |
| **YUYV to RGB** | Fixed‑point BT.601 conversion for truecolor output |
| **Multiple render modes** | Braille (`⠿`), Blocks (`█ ░`), ASCII ramp, Half‑block, Dots - switch live with `m`/`M` |
| **Edge detection** | Sobel, Sobel with direction, Laplacian - toggle with `x`/`X` |
| **Hot‑reloadable charsets**| Load `.txt` ramps from a directory, switch with `n`/`N`, monitor with inotify |
| **Pseudo‑3D depth pop** | Parallax effect based on brightness - adjust with `+`/`-`/`v` |
| **Floyd‑Steinberg dither**| Error‑diffusion to reduce banding |
| **ANSI truecolor** | `\033[38;2;R;G;Bm` per‑cell coloring |
| **Hot‑reload plugin system**| `inotify` + `dlopen` - rebuild a filter `.so`, it reloads live |
| **FPS‑capped render loop**| `CLOCK_MONOTONIC` + `nanosleep` frame pacing |
| **Producer/consumer threads**| Double‑buffered capture + render (stubbed in main loop, active in `thread_sharing.c`) |
| **Cross‑platform** | Linux (V4L2, nolibc) and macOS (AVFoundation, system libc) |
Linux: requires `gcc`, `linux/videodev2.h` (kernel headers), `libdl`, `libpthread`.
macOS: requires `Clang` and `AVFoundation` frameworks (linked automatically).
No other external dependencies.
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@ -98,16 +107,21 @@ gcc -O2 -fPIC -shared -Iinclude filters/my_filter.c -o build/my_filter.so
- [x] SIMD YUYV to grayscale (SSE2)
- [x] Hot-reload plugin system
- [x] nolibc - zero libc calls
- [ ] Custom charset via config file
- [x] Custom charset via config file
- [ ] Record to `.mp4` / `.gif`
- [ ] Inter-frame delta compression
- [ ] LUT cache optimization
- [ ] Replace `pthread` with raw `futex` syscalls
- [ ] Replace `dlopen` with a minimal ELF loader
- [ ] Custom threading library using `clone()` + `futex` to eliminate `-lpthread` (`pthread` functions) dependency
- [ ] Implement an ELF loader (or statically link plugins) to eliminate `-ldl` (`dlopen`/`dlsym`/`dlclose` which are part of `libdl.so` also `glibc`) dependency
- [x] MacOS support
- [ ] Color support for MacOS
- [ ] Windows support
## Fixes
- [ ] [Issue #2](https://github.com/Harshit-Dhanwalkar/AsciiCam/issues/2) MacOS support
- Rewrite `capture.c` for MacOS port using [AVFoundation](https://developer.apple.com/library/archive/documentation/AudioVideo/Conceptual/AVFoundationPG/Articles/04_MediaCapture.html). ([Stackoverflow : how do I set up a video input using the AVFoundation framework](https://stackoverflow.com/questions/32053460/how-do-i-set-up-a-video-input-using-the-avfoundation-framework))
- [x] [Issue #2](https://github.com/Harshit-Dhanwalkar/AsciiCam/issues/2) MacOS support
- [x] Rewrite `capture.c` for MacOS port using [AVFoundation](https://developer.apple.com/library/archive/documentation/AudioVideo/Conceptual/AVFoundationPG/Articles/04_MediaCapture.html). ([Stackoverflow : how do I set up a video input using the AVFoundation framework](https://stackoverflow.com/questions/32053460/how-do-i-set-up-a-video-input-using-the-avfoundation-framework))
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