code wiki / _hdl_build / nx_connect_speaker.nx
nx_connect_speaker.nx
buildroot/runtime/_hdl_build/nx_connect_speaker.nx
about
nx_connect_speaker.nx -- VIDEO ROOM receive intelligence: active-speaker detection +
dominant-speaker layout. Ranks participants by audio ENERGY LEVEL, promotes the dominant speaker
to the full SVC tile (L2) and demotes others to thumbnails (L0), with HYSTERESIS (a one-frame
blip does NOT flip the layout), a manual PIN override, and SVC-subscription recompute on change.
Content-blind preserved: detection uses only the cleartext audio-LEVEL metadata (a small energy
number sent alongside the encrypted audio) -- the server NEVER decodes the audio itself. A naive
system decodes audio to find the speaker (server audio-decoded = N); ours = 0 -> the content-blind
exceed is preserved while adding the active-speaker feature. 7 checks incl. negative control.
100% sovereign. license_tier: ORIGINAL expect_exit: 0
dependencies 1 imports · 0 importers
imports: nx_syscalls.nx
imported by: nobody (leaf or entry point)
call flow from main pre-order; caps 40 nodes / depth 6 declared; ↻ = already shown
structs
| none |
consts
| 13 | const L0: i64 = 10 // thumbnail layer |
| 14 | const L2: i64 = 100 // full layer (dominant speaker) |
| 15 | const NOISE_FLOOR: i64 = 10 |
| 16 | const HYST_W: i64 = 2 // candidate must lead for W frames before the layout switches |
| 17 | const MARGIN: i64 = 10 // and lead the current dominant by this margin |
functions
| 19 | func sw(s: *u8) -> i64 { var n: i64=0; while s[n]!=(0 as u8){n=n+1} sys_write(1,s,n); return 0 } |
| 20 | func sn(v: i64) -> i64 { let bb: *u8=sys_mmap(28); var m: i64=v; if m<0{m=0-m;sys_write(1,"-" as *u8,1)} let t: *u8=sys_mmap(28); var k: i64=0; if m==0{t[0]=48 as u8;k=1} while m>0{t[k]=(48+(m%10)) as u8;m=m/10;k=k+1} var i: i64=0; while i<k{bb[i]=t[k-1-i];i=i+1} sys_write(1,bb,k); return 0 } |
| 23 | func dominant_of(levels: *i64, n: i64, floor: i64) -> i64 |
| 32 | func spk_update(st: *i64, levels: *i64, n: i64) -> i64 |
| 42 | func layout_tier(idx: i64, dominant: i64, pinned: i64) -> i64 called by 1: main |
| 48 | func tcheck(pass: i64, label: *u8, fails: *i64) -> i64 |
| 54 | func main() -> i64 |