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use crate::*;
#[test]
fn mebx() {
// A real two-track capture: an HEVC video track plus a multiplexed/"boxed"
// timed metadata track (`mebx`, ISO/IEC 14496-12:2026 Section 12.8) using
// the `me4c` key namespace, referencing the video track via a `cdsc`
// track reference. Declares one key per colour-calibration value plus a
// `labl` key repeated with two different `loca` variants (ISO/IEC
// 14496-12:2026 Section 12.8.4.5 explicitly allows this: several keys of
// the same key type, differing only by locale). The source file also
// carried an `iods` box in `moov`, which this crate doesn't support (an
// unrelated legacy MPEG-4 object descriptor box); it was stripped from
// the fixture, with `moov`'s size and `stco` offsets adjusted to match.
//
// This example was taken from:
// https://mpeggroup.github.io/FileFormatConformance/files/under_consideration/mebx/test_mebx_me4c.mp4
const ENCODED: &[u8] = include_bytes!("mebx.mp4");
let buf = &mut std::io::Cursor::new(ENCODED);
let ftyp = Ftyp::decode(buf).expect("failed to decode ftyp");
assert_eq!(
ftyp,
Ftyp {
major_brand: b"mp42".into(),
minor_version: 0,
compatible_brands: vec![b"mp42".into(), b"isom".into()],
}
);
let moov = Moov::decode(buf).expect("failed to decode moov");
fn key(local_key_id: &[u8; 4], setu: &str, loca: Option<&str>) -> MebxKey {
MebxKey {
local_key_id: FourCC::new(local_key_id),
keyd: Keyd {
key_namespace: FourCC::new(b"me4c"),
key_value: local_key_id.to_vec(),
},
dtyp: None,
loca: loca.map(|locale| Loca {
locale: locale.into(),
}),
setu: Some(Setu {
data: setu.as_bytes().to_vec(),
}),
}
}
assert_eq!(
moov,
Moov {
mvhd: Mvhd {
creation_time: 3732765738,
modification_time: 3732765738,
timescale: 600,
duration: 600,
rate: 1.into(),
volume: 1.into(),
matrix: Matrix {
a: 65536,
b: 0,
u: 0,
c: 0,
d: 65536,
v: 0,
x: 0,
y: 0,
w: 1073741824
},
next_track_id: 3
},
trak: vec![
Trak {
tkhd: Tkhd {
creation_time: 3732765738,
modification_time: 3732765738,
track_id: 1,
duration: 600,
layer: 0,
alternate_group: 0,
enabled: true,
in_movie: true,
size_is_aspect_ratio: false,
volume: 0.into(),
matrix: Matrix {
a: 65536,
b: 0,
u: 0,
c: 0,
d: 65536,
v: 0,
x: 0,
y: 0,
w: 1073741824
},
width: 64.into(),
height: 48.into(),
},
mdia: Mdia {
mdhd: Mdhd {
creation_time: 3732765738,
modification_time: 3732765738,
timescale: 30000,
duration: 30000,
language: "und".into(),
},
hdlr: Hdlr {
handler: FourCC::new(b"vide"),
name: "vide".into(),
},
minf: Minf {
vmhd: Some(Vmhd {
graphics_mode: 0,
op_color: RgbColor {
red: 0,
green: 0,
blue: 0
}
}),
dinf: Dinf {
dref: Dref {
urls: vec![Url {
location: "".into()
}]
}
},
stbl: Stbl {
stsd: Stsd {
codecs: vec![Hvc1 {
visual: Visual {
data_reference_index: 1,
width: 64,
height: 48,
horizresolution: 72.into(),
vertresolution: 72.into(),
frame_count: 1,
compressor: "".into(),
depth: 24,
},
hvcc: Hvcc {
configuration_version: 1,
general_profile_space: 0,
general_tier_flag: false,
general_profile_idc: 4,
general_profile_compatibility_flags: [8, 0, 0, 0],
general_constraint_indicator_flags: [0, 0, 0, 0, 0, 0],
general_level_idc: 30,
min_spatial_segmentation_idc: 0,
parallelism_type: 0,
chroma_format_idc: 1,
bit_depth_luma_minus8: 0,
bit_depth_chroma_minus8: 0,
avg_frame_rate: 0,
constant_frame_rate: 0,
num_temporal_layers: 1,
temporal_id_nested: true,
length_size_minus_one: 0,
arrays: vec![
HvcCArray {
completeness: true,
nal_unit_type: 32,
nalus: vec![vec![
64, 1, 12, 1, 255, 255, 4, 8, 0, 0, 3, 0,
159, 168, 0, 0, 3, 0, 0, 30, 186, 2, 64
]]
},
HvcCArray {
completeness: true,
nal_unit_type: 33,
nalus: vec![vec![
66, 1, 1, 4, 8, 0, 0, 3, 0, 159, 168, 0, 0,
3, 0, 0, 30, 160, 32, 131, 22, 91, 171,
147, 43, 154, 2, 0, 0, 3, 0, 2, 0, 0, 3, 0,
50, 16
]]
},
HvcCArray {
completeness: true,
nal_unit_type: 34,
nalus: vec![vec![68, 1, 193, 115, 192, 137]]
},
],
},
lhvc: None,
btrt: None,
colr: None,
pasp: None,
taic: None,
fiel: None,
ccst: None,
}
.into()],
},
stts: Stts {
entries: vec![SttsEntry {
sample_count: 30,
sample_delta: 1000
}]
},
stsc: Stsc {
entries: vec![StscEntry {
first_chunk: 1,
samples_per_chunk: 30,
sample_description_index: 1
}]
},
stsz: Stsz {
samples: StszSamples::Different {
sizes: vec![
44, 41, 27, 74, 39, 44, 41, 27, 74, 39, 44, 41, 27, 74,
39, 44, 41, 27, 74, 39, 44, 41, 27, 74, 39, 44, 41, 27,
74, 39
]
}
},
stco: Some(Stco {
entries: vec![1686]
}),
..Default::default()
},
..Default::default()
}
},
..Default::default()
},
Trak {
tkhd: Tkhd {
creation_time: 3732765738,
modification_time: 3732765738,
track_id: 2,
duration: 600,
layer: 0,
alternate_group: 0,
enabled: true,
in_movie: true,
size_is_aspect_ratio: false,
volume: 0.into(),
matrix: Matrix {
a: 65536,
b: 0,
u: 0,
c: 0,
d: 65536,
v: 0,
x: 0,
y: 0,
w: 1073741824
},
width: 0.into(),
height: 0.into(),
},
mdia: Mdia {
mdhd: Mdhd {
creation_time: 3732765738,
modification_time: 3732765738,
timescale: 30000,
duration: 30000,
language: "und".into(),
},
hdlr: Hdlr {
handler: FourCC::new(b"meta"),
name: "meta".into(),
},
minf: Minf {
nmhd: Some(Nmhd {}),
dinf: Dinf {
dref: Dref {
urls: vec![Url {
location: "".into()
}]
}
},
stbl: Stbl {
stsd: Stsd {
codecs: vec![Mebx {
metadata: MetaData {
data_reference_index: 1
},
keys: vec![
key(b"redd", "Config RED", None),
key(b"blue", "Config BLUE", None),
key(b"ylow", "Config YELLOW", None),
key(b"whte", "Config WHITE", None),
key(b"blck", "Config BLACK", None),
key(b"labl", "Config lable ENGLISH", Some("en-US")),
key(b"labl", "Config lable GERMAN", Some("de-DE")),
],
btrt: None,
}
.into()],
},
stts: Stts {
entries: vec![SttsEntry {
sample_count: 30,
sample_delta: 1000
}]
},
stsc: Stsc {
entries: vec![StscEntry {
first_chunk: 1,
samples_per_chunk: 30,
sample_description_index: 1
}]
},
stsz: Stsz {
samples: StszSamples::Different {
sizes: vec![
72, 48, 24, 72, 72, 72, 48, 24, 72, 72, 72, 48, 24, 72,
72, 72, 48, 24, 72, 72, 72, 48, 24, 72, 72, 72, 48, 24,
72, 72
]
}
},
stco: Some(Stco {
entries: vec![3036]
}),
..Default::default()
},
..Default::default()
}
},
tref: Some(Tref {
track_reference_type_boxes: vec![TrackReferenceTypeBox {
reference_type: FourCC::new(b"cdsc"),
track_ids: vec![1]
}]
}),
..Default::default()
},
],
..Default::default()
}
);
let mdat = Mdat::decode(buf).expect("failed to decode mdat");
assert_eq!(mdat.data.len(), 3078);
// The file ends right after mdat.
assert!(!buf.has_remaining());
// Round-trip: re-encode and decode everything back.
let mut reencoded = Vec::new();
ftyp.encode(&mut reencoded).expect("failed to encode ftyp");
moov.encode(&mut reencoded).expect("failed to encode moov");
mdat.encode(&mut reencoded).expect("failed to encode mdat");
let reencoded_buf = &mut reencoded.as_slice();
let reencoded_ftyp = Ftyp::decode(reencoded_buf).expect("failed to re-decode ftyp");
let reencoded_moov = Moov::decode(reencoded_buf).expect("failed to re-decode moov");
let reencoded_mdat = Mdat::decode(reencoded_buf).expect("failed to re-decode mdat");
assert_eq!(reencoded_ftyp, ftyp);
assert_eq!(reencoded_moov, moov);
assert_eq!(reencoded_mdat, mdat);
}