code wiki / _hdl_build / nx_lossless_codec_gate.nx

nx_lossless_codec_gate.nx

buildroot/runtime/_hdl_build/nx_lossless_codec_gate.nx

6123 B100 linesdepth 3pulls 4 transitivereach 0 importersview sourcekind gate/prooftopic lossless
docsdependenciesstructsconstsfunctions

about

nx_lossless_codec_gate.nx -- sovereign LOSSLESS image codec (the "lossless" S-class capability): PAETH spatial predictor (PNG filter type 4 -- DEFINITIVELY patent-free, PNG was designed patent-free) -> residual -> rANS (public-domain). Decode replays the Paeth prediction from already-decoded neighbors + adds the residual = BIT-EXACT reconstruction by construction. Measured on the REAL frame luma (576x1024). All tools provably clean (Paeth=PD/PNG, rANS=PD) -> passes nx_codec_provenance_gate. The lossless head-to-head vs PNG/FFV1 (3rd-party reference) is the next measured-exceed step. license_tier: ORIGINAL

dependencies 3 imports · 0 importers

nx_syscalls.nx nx_gate_emit_lib.nx nx_rans.nx nx_lossless_codec_gate.nx

imports: nx_syscalls.nxnx_gate_emit_lib.nxnx_rans.nx

imported by: nobody (leaf or entry point)

call flow from main pre-order; caps 40 nodes / depth 6 declared; ↻ = already shown

main g_puts sys_write sys_mmap sys_read_file sys_openat_rd sys_lseek sys_mmap ↻ sys_read sys_close sys_exit paeth iabs rans_count rans_normalize rans_cum rans_build_slot2sym rans_encode sys_mmap ↻ rans_decode g_num sys_mmap ↻ sys_write ↻ g_check g_puts ↻ sys_openat_append g_w sys_write ↻ g_wn sys_mmap ↻ sys_write ↻ sys_close ↻

structs

none

consts

none

functions

11func g_num(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 }
called by 1: main calls 2: sys_mmapsys_write
12func g_w(fd: i64, s: *u8) -> i64 { var n: i64=0; while s[n]!=(0 as u8){n=n+1} sys_write(fd,s,n); return 0 }
called by 1: main calls 1: sys_write
13func g_wn(fd: i64, v: i64) -> i64 { let bb: *u8=sys_mmap(28); var m: i64=v; 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(fd,bb,k); return 0 }
called by 1: main calls 2: sys_mmapsys_write
14func iabs(v: i64) -> i64 { if v<0 { return 0-v } return v }
called by 1: paeth
16func paeth(a: i64, b: i64, c: i64) -> i64
called by 1: main calls 1: iabs
24func main() -> i64
calls 17: g_putssys_mmapsys_read_filesys_exitpaethrans_count+11