mirror of
https://github.com/wader/fq.git
synced 2024-11-24 03:05:22 +03:00
90 lines
2.6 KiB
Plaintext
90 lines
2.6 KiB
Plaintext
def protobuf_to_value:
|
|
.fields | map({(.name | tostring): (.enum // .value)}) | add;
|
|
|
|
# hack to parse just a box
|
|
# <binary> | mp4_box
|
|
def mp4_box:
|
|
[0, 0, 0, 16, "ftyp", "isom", 0, 0 , 2 , 0, .] | mp4.boxes;
|
|
|
|
# converted from https://github.com/FFmpeg/FFmpeg/blob/870bfe16a12bf09dca3a4ae27ef6f81a2de80c40/libavutil/display.c av_display_rotation_get
|
|
def mp4_matrix_structure_rotation:
|
|
( .a as $s0
|
|
| .c as $s3
|
|
| .b as $s1
|
|
| .d as $s4
|
|
| ($s0*$s0 + $s3*$s3 | sqrt) as $scale0
|
|
| ($s1*$s1 + $s4*$s4 | sqrt) as $scale1
|
|
| atan2($s1/$scale1; $s0 / $scale0) * 180 / 3.14159265359
|
|
| -round
|
|
);
|
|
|
|
def flac_dump:
|
|
[ "fLaC"
|
|
, first(.. | select(format == "flac_metadatablocks"))
|
|
, (.. | select(format == "flac_frame"))
|
|
] | tobits;
|
|
|
|
def urldecode:
|
|
gsub(
|
|
"%(?<c>[a-fA-F0-9]{2})";
|
|
( .c
|
|
| ascii_downcase
|
|
| explode
|
|
# "0"-"9" or "a"-"f"
|
|
| map(.-48 | if .>=49 then .-39 else . end)
|
|
| [.[0]*16+.[1]]
|
|
| implode
|
|
)
|
|
);
|
|
|
|
# see all first frames where sample_rate changes
|
|
# ex: .frames | changes(.header.sample_rate)
|
|
def changes(f): streaks_by(f)[].[0];
|
|
|
|
def toradix62sp: toradix(62; "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
|
|
def fromradix62sp: fromradix(62; {
|
|
"0": 0, "1": 1, "2": 2, "3": 3,"4": 4, "5": 5, "6": 6, "7": 7, "8": 8, "9": 9,
|
|
"a": 10, "b": 11, "c": 12, "d": 13, "e": 14, "f": 15, "g": 16,
|
|
"h": 17, "i": 18, "j": 19, "k": 20, "l": 21, "m": 22, "n": 23,
|
|
"o": 24, "p": 25, "q": 26, "r": 27, "s": 28, "t": 29, "u": 30,
|
|
"v": 31, "w": 32, "x": 33, "y": 34, "z": 35,
|
|
"A": 36, "B": 37, "C": 38, "D": 39, "E": 40, "F": 41, "G": 42,
|
|
"H": 43, "I": 44, "J": 45, "K": 46, "L": 47, "M": 48, "N": 49,
|
|
"O": 50, "P": 51, "Q": 52, "R": 53, "S": 54, "T": 55, "U": 56,
|
|
"V": 57, "W": 58, "X": 59, "Y": 60, "Z": 61
|
|
});
|
|
|
|
# "01:09:55.76" -> 4195.76
|
|
# 4195.76 -> "01:09:55.76"
|
|
def duration:
|
|
def lpad($s; $w): ($s * ($w+1-length))[1:] + .;
|
|
def _string:
|
|
( split(":")
|
|
| map(tonumber)
|
|
| reverse
|
|
| [foreach .[] as $n (0; . + 1; pow(60; .-1) * $n)]
|
|
# sum smallest to largest seem to improve precision
|
|
| sort
|
|
| reverse
|
|
| add
|
|
);
|
|
def _number:
|
|
if . == 0 then 0
|
|
else
|
|
[ ( [ (recurse(if . > 0 then intdiv(.; 60) else empty end) | . % 60)]
|
|
| reverse
|
|
| .[1:]
|
|
| map(tostring | lpad("0"; 2))
|
|
| join(":")
|
|
)
|
|
# ugly but float is not accurate enough
|
|
, ( tostring
|
|
| split(".")[1] // empty
|
|
| ".", .
|
|
)
|
|
] | join("")
|
|
end;
|
|
if type == "string" then _string
|
|
elif type == "number" then _number
|
|
else error("expected string or number") end;
|