daala_image_plane(3)

💖 daala_image_plane(3) 💖

okay bestie, welcome to the Library Functions Manual page for daala_image_plane(3) — literally one of the cutest little structs in the daala lineup. she's giving one single component of an image or frame, and she's serving it. periodt. 🎀

---

✨ NAME ✨

daala_image_plane — Representation of a single component within an image or frame.

---

🌸 SYNOPSIS 🌸

#include <codec.h>

🦋 Data Fields 🦋

• unsigned char * data — Image data is stored as an unsigned octet type whether it's actually 8 bit or a multi-byte depth. so like, the type stays octet-coded no matter how deep you go, iykyk 💅
• unsigned char xdec — The decimation factor in the x and y direction.
• unsigned char ydec — (same deal as above, she's the y-direction half of that decimation duo ✨)
• int xstride — Distance in memory between two pixels horizontally next to each other.
• int ystride — Distance in memory between two pixels vertically next to each other.
• int bitdepth — 8 for 'normal' video precision; data is unsigned bytes centered on 128.

---

💜 Detailed Description 💜

Representation of a single component within an image or frame. that's it, that's the whole vibe — one plane, one component, main character energy. 👑

---

🎀 Field Documentation 🎀

💖 unsigned char daala_image_plane::xdec 💖

The decimation factor in the x and y direction. Pixels are reduced by a factor of 2^xdec so 0 is none, 1 is decimated by a factor of 2.

so like, for the visual learners: YUV420 will have xdec of 1 and ydec also of 1. And YUV444 will have xdec and ydec set to zero. slay. 🌈

🌸 int daala_image_plane::xstride 🌸

Distance in memory between two pixels horizontally next to each other. The value is in bytes regardless of the 'actual' underlying depth (either unsigned bytes for 8 bit video or unsigned 16 bit shorts for high-depth video).

The xstride may be larger than the actual data width calculated from the bitdepth; this implies packed rather than planar data. no cap. 💅

🦋 int daala_image_plane::ystride 🦋

Distance in memory between two pixels vertically next to each other. As with xstride, this value is always in bytes. bestie said consistency, and she MEANT it. ✨

👑 int daala_image_plane::bitdepth 👑

8 for 'normal' video precision; data is unsigned bytes centered on 128.

Greater-than-8 indicates high-depth video; data is unnormalized host-endian order unsigned signed 16-bit shorts (two octets).

For example, 10 bit video would declare a bit depth of 10, use the lower 10 bits of each 16 bit short, and center on 512. iconic behavior honestly. 🍓

---

💫 Author 💫

Generated automatically by Doxygen for daala from the source code. (so if the prose is a little stiff, blame the robots, not me 🫶)

---

lowkey a whole struct, highkey a whole personality. go forth and set your strides correctly bestie, the pixels are counting on you 💖

daala · Version unknown · daala_image_plane(3) — mwah, that's a wrap, ty for coming to my ted talk 🌸✨🎀