fq/README.md

# fq

Tool, language and decoders for inspecting binary data.

![fq demo](doc/demo.svg)

In most cases fq works the same way as jq but instead of reading JSON it reads binary data.
The result is a JSON compatible structures where each value has a bit range, symbolic
interpretations and know how to be presented in a useful way.

You can pronounce the name as you wish, i pronounce jq /‘dʒei’kju:/ so I usually prefer /‘ef’kju:/.

**NOTE:** fq is early in development and many things are missing, broken or do not make sense.
That also means there is a great opportunity to help out!

## Goals

- Make binary formats accessible and queryable.
- Nested formats and bit-oriented decoding.
- Quick and comfortable CLI tool.
- Bit and byte transformations and conversions.
- Programmer's calculator.

## Hopes
- Make it useful enough that people want to help improve it.
- Inspire people to create similar tools.

## Usage

Basic usage is `fq . file`.

For details see [usage.md](doc/usage.md)

## Install

Download [release](https://github.com/wader/fq/releases) for your
platform, unarchive it and move the executable to `PATH` etc.

### Homebrew

```sh
# install latest release
brew install wader/tap/fq
```

### Arch Linux

`fq` can be installed from the [community repository](https://archlinux.org/packages/community/x86_64/fq/) using [pacman](https://wiki.archlinux.org/title/Pacman):

```sh
pacman -S fq
```

You can also build and install the development (VCS) package using an [AUR helper](https://wiki.archlinux.org/index.php/AUR_helpers):

```sh
paru -S fq-git
```

### Nix

```sh
nix-shell -p fq
```

### FreeBSD

Use the [fq](https://cgit.freebsd.org/ports/tree/misc/fq) port.

### Alpine

Currently in edge testing but should work fine in stable also.

```
apk add -X http://dl-cdn.alpinelinux.org/alpine/edge/testing fq
```

### Build from source

Make sure you have go 1.17 or later installed.

To install directly from git repository do:
```sh
# build and install latest release
go install github.com/wader/fq@latest

# or build and install latest master
go install github.com/wader/fq@master

# copy binary to $PATH if needed
cp "$(go env GOPATH)/bin/fq" /usr/local/bin
```

To build and run tests from source directory:
```sh
make test fq
# copy binary to $PATH if needed
cp fq /usr/local/bin
# it's also possible to use go run
go run fq.go
```

## Supported formats

[./formats_list.jq]: sh-start

aac_frame,
adts,
adts_frame,
apev2,
ar,
av1_ccr,
av1_frame,
av1_obu,
avc_annexb,
avc_au,
avc_dcr,
avc_nalu,
avc_pps,
avc_sei,
avc_sps,
avro_ocf,
bencode,
bsd_loopback_frame,
bson,
bzip2,
cbor,
dns,
dns_tcp,
elf,
ether8023_frame,
exif,
flac,
flac_frame,
flac_metadatablock,
flac_metadatablocks,
flac_picture,
flac_streaminfo,
gif,
gzip,
hevc_annexb,
hevc_au,
hevc_dcr,
hevc_nalu,
icc_profile,
icmp,
id3v1,
id3v11,
id3v2,
ipv4_packet,
jpeg,
json,
matroska,
mp3,
mp3_frame,
mp4,
mpeg_asc,
mpeg_es,
mpeg_pes,
mpeg_pes_packet,
mpeg_spu,
mpeg_ts,
msgpack,
ogg,
ogg_page,
opus_packet,
pcap,
pcapng,
png,
protobuf,
protobuf_widevine,
pssh_playready,
raw,
sll2_packet,
sll_packet,
tar,
tcp_segment,
tiff,
udp_datagram,
vorbis_comment,
vorbis_packet,
vp8_frame,
vp9_cfm,
vp9_frame,
vpx_ccr,
wav,
webp,
xing,
zip

[#]: sh-end

For details see [formats.md](doc/formats.md)

## TODO and ideas

See [TODO.md](doc/TODO.md)

## Development

See [dev.md](doc/dev.md)

## Thanks and related projects

This project would not have been possible without [itchyny](https://github.com/itchyny)'s
jq implementation [gojq](https://github.com/itchyny/gojq). I also want to thank
[HexFiend](https://github.com/HexFiend/HexFiend) for inspiration and ideas and [stedolan](https://github.com/stedolan)
for inventing the [jq](https://github.com/stedolan/jq) language.

### Similar or related projects

- [HexFiend](https://github.com/HexFiend/HexFiend)
- [binspector](https://github.com/binspector/binspector)
- [kaitai](https://kaitai.io)
- [Wireshark](https://www.wireshark.org) (specially `tshark -T json`)
- [MediaInfo](https://mediaarea.net/en/MediaInfo) (specially `mediainfo --Output=JSON` and `mediainfo --Details=1`)
- [GNU poke](https://www.jemarch.net/poke)
- [ffmpeg/ffprobe](https://ffmpeg.org)
- [hexdump](https://git.kernel.org/pub/scm/utils/util-linux/util-linux.git/tree/text-utils/hexdump.c)