code wiki / _hdl_build / nx_movie_probe.nx

nx_movie_probe.nx

buildroot/runtime/_hdl_build/nx_movie_probe.nx

19216 B301 linesdepth 2pulls 2 transitivereach 0 importersview sourcekind probe
docsdependenciesstructsconstsfunctions

about

nx_movie_probe.nx -- MOVIE LIVENESS PROBE (operator 2026-07-04: "broken movies where i cant see the start, finish, chapters, the dead air, the performance"). The video rung of the media-liveness plane (serving != working). A SOVEREIGN ISO-BMFF (MP4/M4V/MOV) box parser: reads ONLY the small `moov` metadata box (seeks past the huge `mdat` -- never loads GB of media) and reports: structural completeness (ftyp/moov/mdat present, not truncated), duration (start->finish), video WxH + codec, audio presence + codec, chapters, embedded cover(thumbnail), fast- start(moov-before-mdat = seekable/streamable), and bitrate (performance). Verdict OK|DEGRADED|BROKEN. HONEST SCOPE: MKV/WebM(EBML) detected + flagged as a TODO rung; true DEAD-AIR(silence) + keyframe-thumbnail-gen need audio/H.264 DECODE (separate rungs) -- we report hasAudio + hasThumbnail, not silence spans. license_tier: ORIGINAL expect_exit: 0

dependencies 1 imports · 0 importers

nx_syscalls.nx nx_movie_probe.nx

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

main pw sys_write sys_exit mp_sweep sys_mmap sys_read_file sys_openat_rd sys_lseek sys_mmap ↻ sys_read sys_close pw ↻ mp_js pn sys_mmap ↻ pw ↻ sys_write ↻ mp_probe sys_openat_rd ↻ sys_lseek sys_close ↻ sys_mmap ↻ mp_read_at sys_lseek ↻ sys_read ↻ be32 be64 be32 ↻ fcc mp_probe_moov mp_find be32 ↻ be64 ↻ fcc ↻ mp_iscontainer fcc ↻ mp_find ↻ be32 ↻ be64 ↻

structs

none

consts

11const R_MAGIC_4096: i64 = 4096
12const R_MAGIC_8192: i64 = 8192
13const R_MAGIC_67108864: i64 = 67108864
14const R_MAGIC_2048: i64 = 2048
15const R_MAGIC_1048576: i64 = 1048576
16const R_MAGIC_4095: i64 = 4095
17const R_MAGIC_1048000: i64 = 1048000
20const R_TS: i64=0 const R_DUR: i64=1 const R_W: i64=2 const R_H: i64=3
21const R_VID: i64=4 const R_AUD: i64=5 const R_VCC: i64=6 const R_ACC: i64=7
22const R_CHP: i64=8 const R_COVR: i64=9 const R_NTRAK: i64=10 const R_FTYP: i64=11
23const R_MOOV: i64=12 const R_MDAT: i64=13 const R_TRUNC: i64=14 const R_FAST: i64=15
24const R_SIZE: i64=16 const R_MKV: i64=17 const R_MOOVSZ: i64=18 const R_POSTER: i64=19
25const R_TSFMT: i64=20 const R_FLV: i64=21

functions

27func pw(s: *u8) -> i64 { var n: i64=0; while s[n]!=(0 as u8){n=n+1} sys_write(1,s,n); return 0 }
called by 4: pnmp_p4mp_sweepmain calls 1: sys_write
28func pn(v: i64) -> i64 { let b: *u8=sys_mmap(24); var m: i64=v; if m<0{pw("-" as *u8);m=0-m} let t: *u8=sys_mmap(24); 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{b[i]=t[k-1-i];i=i+1} sys_write(1,b,k); return 0 }
called by 2: mp_sweepmain calls 3: sys_mmappwsys_write
29func p4(buf: *u8, o: i64) -> i64 { sys_write(1,(buf as i64+o) as *u8,4); return 0 }
calls 1: sys_write
30func be32(buf: *u8, o: i64) -> i64 { return ((buf[o] as i64)<<24)|((buf[o+1] as i64)<<16)|((buf[o+2] as i64)<<8)|(buf[o+3] as i64) }
called by 5: be64mp_findmp_trakmp_probe_moovmp_probe
31func be64(buf: *u8, o: i64) -> i64 { return (be32(buf,o)<<32)|be32(buf,o+4) }
called by 3: mp_findmp_probe_moovmp_probe calls 1: be32
32func fcc(buf: *u8, o: i64, a: i64, b: i64, c: i64, d: i64) -> i64 { if (buf[o] as i64)!=a {return 0} if (buf[o+1] as i64)!=b {return 0} if (buf[o+2] as i64)!=c {return 0} if (buf[o+3] as i64)!=d {return 0} return 1 }
called by 5: mp_iscontainermp_findmp_trakmp_probe_moovmp_probe
33func sys_lseek(fd: i64, off: i64, whence: i64) -> i64 { return __syscall(8, fd, off, whence, 0, 0, 0) }
called by 2: mp_read_atmp_probe
34func mp_read_at(fd: i64, off: i64, buf: *u8, n: i64) -> i64
called by 1: mp_probe calls 2: sys_lseeksys_read
41func mp_iscontainer(buf: *u8, o: i64) -> i64
called by 1: mp_find calls 1: fcc
54func mp_find(buf: *u8, start: i64, end: i64, a: i64, b: i64, c: i64, d: i64, depth: i64) -> i64
called by 3: mp_findmp_trakmp_probe_moov calls 5: be32be64fccmp_iscontainermp_find
76func mp_trak(buf: *u8, start: i64, end: i64, res: *i64) -> i64
called by 1: mp_probe_moov calls 3: mp_findfccbe32
100func mp_probe_moov(buf: *u8, moovlen: i64, res: *i64) -> i64
called by 1: mp_probe calls 5: mp_findbe32be64fccmp_trak
124func mp_probe(path: *u8, res: *i64) -> i64
called by 2: mp_sweepmain calls 10: sys_openat_rdsys_lseeksys_closesys_mmapmp_read_atbe32+4
184func mp_has_poster(path: *u8) -> i64
called by 1: mp_probe calls 3: sys_mmapsys_openat_rdsys_close
193func mp_vstr(v: i64) -> *u8 { if v==2 {return "OK"} if v==1 {return "DEGRADED"} return "BROKEN" }
called by 2: mp_sweepmain
195func mp_p4(v: i64) -> i64 { if v==0 { pw("-" as *u8); return 0 } let b: *u8=sys_mmap(4); b[0]=((v>>24)&0xff) as u8; b[1]=((v>>16)&0xff) as u8; b[2]=((v>>8)&0xff) as u8; b[3]=(v&0xff) as u8; sys_write(1,b,4); return 0 }
called by 1: main calls 3: pwsys_mmapsys_write
198func mp_js(dst: *u8, o: i64, s: *u8) -> i64 { var i: i64=0; while s[i]!=(0 as u8){dst[o]=s[i];o=o+1;i=i+1} return o }
called by 1: mp_sweep
200func mp_dec(dst: *u8, o: i64, v: i64) -> i64 { var m: i64=v; if m<0{dst[o]=45 as u8;o=o+1;m=0-m} let t: *u8=sys_mmap(24); 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{dst[o]=t[k-1-i];o=o+1;i=i+1} return o }
called by 1: mp_sweep calls 1: sys_mmap
202func mp_jesc(dst: *u8, o: i64, s: *u8, cap: i64) -> i64 { var i: i64=0; while s[i]!=(0 as u8){ let c: i64=s[i] as i64; if c==34 { if o<cap-2 {dst[o]=92 as u8;dst[o+1]=34 as u8;o=o+2} } else { if c==92 { if o<cap-2 {dst[o]=92 as u8;dst[o+1]=92 as u8;o=o+2} } else { if c>=32 { if o<cap-1 {dst[o]=s[i] as u8;o=o+1} } } } i=i+1 } return o }
called by 1: mp_sweep
206func mp_sweep(catalog: *u8, outpath: *u8, max: i64) -> i64
called by 1: main calls 12: sys_mmapsys_read_filepwmp_jspnmp_probe+6
267func main(argc: i64, argv: *i64) -> i64
calls 8: pwsys_exitmp_sweepsys_mmapmp_probemp_vstr+2