code wiki / _hdl_build / nx_vcodec_look_dump.nx
nx_vcodec_look_dump.nx
buildroot/runtime/_hdl_build/nx_vcodec_look_dump.nx
about
nx_vcodec_look_dump.nx -- THE LOOK GATE's frame extractor (2026-07-29, seq1262/seq1247 class).
PSNR-BD is blind to structured texture loss: a lambda/quant change can be BD-GREEN while making
real frames smeary (the 786/787 field-blockiness class). This organ produces the artifact a
visual verdict needs: encode the SHIPPED CHAIN (key=vv_enc_rc qp*188, P=vv_enc_rct9 qp*94,
same seed discipline as nx_vcodec_msu_ours13) up to a chosen frame, then write SOURCE and RECON
luma as 8-bit grayscale BMPs (browser/tool-viewable, zero external deps) and print the cumulative
stream bytes -- matched-RATE pairs across encoder arms are selected on that number, never on qp.
CIF only (352x288; width divisible by 4 so BMP rows need no padding).
usage: nx_vcodec_look_dump <emode> <y4m> <qp> <dumpframe 1..47> <outprefix>
license: ORIGINAL
dependencies 2 imports · 0 importers
imports: nx_syscalls.nxnx_video_codec_wasm.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 BMP_MAGIC_2835: i64 = 2835 |
| 14 | const BMP_MAGIC_4194304: i64 = 4194304 |
| 15 | const BMP_MAGIC_8192: i64 = 8192 |
| 16 | const BMP_MAGIC_65536: i64 = 65536 |
| 18 | const SW: i64 = 352 |
| 19 | const SH: i64 = 288 |
| 20 | const NF: i64 = 48 |
| 21 | const KEYMUL: i64 = 188 |
| 22 | const PMUL: i64 = 94 |
| 23 | const BMP_HDR: i64 = 1078 // 14 file + 40 info + 256*4 grayscale palette |
functions
| 25 | func gw(s: *u8) -> i64 { var n: i64=0; while s[n]!=(0 as u8){n=n+1} sys_write(1,s,n); return 0 } |
| 26 | func gn(v: i64) -> i64 |
| 30 | func cpb(d: *u8, s: *u8, n: i64) -> i64 { var i: i64=0; while i<n { d[i]=s[i]; i=i+1 } return 0 } |
| 31 | func atoi(a: *u8) -> i64 { var v: i64=0; var i: i64=0 called by 1: main |
| 33 | func slen(s: *u8) -> i64 { var n: i64=0; while s[n]!=(0 as u8){n=n+1} return n } called by 1: pathcat |
| 35 | func wr32le(b: *u8, off: i64, v: i64) -> i64 called by 1: bmp_write |
| 38 | func wr16le(b: *u8, off: i64, v: i64) -> i64 called by 1: bmp_write |
| 42 | func bmp_write(path: *u8, luma: *u8) -> i64 |
| 65 | func frames(yuv: *u8, hi: i64, total: i64, fp: *i64, fdata: i64) -> i64 called by 1: main |
| 72 | func seed(rctx: *i64, emode: i64, est: *i64, probs: *i64, rcbuf: *u8, t8c: *i64, plane: *i64) -> i64 called by 1: main |
| 77 | func pathcat(dst: *u8, pre: *u8, suf: *u8) -> i64 |
| 85 | func main(argc: i64, argv: *i64) -> i64 |