decode: Move registry package to decode/registry and add a format group type

doc/formats.md

@@ -2,7 +2,7 @@
 
 [./formats_table.jq]: sh-start
 
-|Name                  |Description                                                   |Uses|
+|Name                  |Description                                                   |Dependencies|
 |-                     |-                                                             |-|
 |`aac_frame`           |Advanced&nbsp;Audio&nbsp;Coding&nbsp;frame                    |<sub></sub>|
 |`adts`                |Audio&nbsp;Data&nbsp;Transport&nbsp;Stream                    |<sub>`adts_frame`</sub>|

doc/formats_table.jq

@@ -6,7 +6,7 @@ def nbsp: gsub(" "; " ");
 [ {
     name: "Name",
     desc: "Description",
-    uses: "Uses"
+    uses: "Dependencies"
   },
   {
     name: "-",

format/all/all.go

@@ -1,4 +1,4 @@
-// Package all imports and registers all formats in the default registry
+// Package all registers all builtin formats with the default registry
 //nolint:revive
 package all
 

format/ape/apev2.go

@@ -8,15 +8,15 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var imageFormat []*decode.Format
+var imageFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.APEV2,
 		Description: "APEv2 metadata tag",
 		DecodeFn:    apev2Decode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.IMAGE}, Formats: &imageFormat},
+			{Names: []string{format.IMAGE}, Group: &imageFormat},
 		},
 	})
 }

format/av1/av1_ccr.go

@@ -11,7 +11,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.AV1_CCR,
 		Description: "AV1 Codec Configuration Record",
 		DecodeFn:    ccrDecode,

format/av1/av1_frame.go

@@ -10,17 +10,17 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var obuFormat []*decode.Format
+var obuFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.AV1_FRAME,
 		Description: "AV1 frame",
 		DecodeFn:    frameDecode,
 		RootArray:   true,
 		RootName:    "frame",
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.AV1_OBU}, Formats: &obuFormat},
+			{Names: []string{format.AV1_OBU}, Group: &obuFormat},
 		},
 	})
 }

format/av1/av1_obu.go

@@ -7,7 +7,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.AV1_OBU,
 		Description: "AV1 Open Bitstream Unit",
 		DecodeFn:    obuDecode,

format/bzip2/bzip2.go

@@ -17,16 +17,16 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var probeFormat []*decode.Format
+var probeGroup decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.BZIP2,
 		Description: "bzip2 compression",
 		Groups:      []string{format.PROBE},
 		DecodeFn:    gzDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.PROBE}, Formats: &probeFormat},
+			{Names: []string{format.PROBE}, Group: &probeGroup},
 		},
 	})
 }
@@ -96,7 +96,7 @@ func gzDecode(d *decode.D, in interface{}) interface{} {
 	}
 	// calculatedCRC32 := crc32W.Sum(nil)
 	uncompressedBB := bitio.NewBufferFromBytes(uncompressed.Bytes(), -1)
-	dv, _, _ := d.FieldTryFormatBitBuf("uncompressed", uncompressedBB, probeFormat, nil)
+	dv, _, _ := d.FieldTryFormatBitBuf("uncompressed", uncompressedBB, probeGroup, nil)
 	if dv == nil {
 		d.FieldRootBitBuf("uncompressed", uncompressedBB)
 	}

format/dns/dns.go

@@ -13,7 +13,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.DNS,
 		Description: "DNS packet",
 		DecodeFn:    dnsDecode,

format/elf/elf.go

@@ -15,7 +15,7 @@ import (
 // TODO: p_type hi/lo
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.ELF,
 		Description: "Executable and Linkable Format",
 		Groups:      []string{format.PROBE},

format/flac/flac.go

@@ -17,18 +17,18 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var flacMetadatablockFormat []*decode.Format
-var flacFrameFormat []*decode.Format
+var flacMetadatablockFormat decode.Group
+var flacFrameFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.FLAC,
 		Description: "Free Lossless Audio Codec file",
 		Groups:      []string{format.PROBE},
 		DecodeFn:    flacDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.FLAC_METADATABLOCKS}, Formats: &flacMetadatablockFormat},
-			{Names: []string{format.FLAC_FRAME}, Formats: &flacFrameFormat},
+			{Names: []string{format.FLAC_METADATABLOCKS}, Group: &flacMetadatablockFormat},
+			{Names: []string{format.FLAC_FRAME}, Group: &flacFrameFormat},
 		},
 	})
 }

format/flac/flac_frame.go

@@ -12,7 +12,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.FLAC_FRAME,
 		Description: "FLAC frame",
 		DecodeFn:    frameDecode,

format/flac/flac_metadatablock.go

@@ -11,19 +11,19 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var flacStreaminfoFormat []*decode.Format
-var flacPicture []*decode.Format
-var vorbisCommentFormat []*decode.Format
+var flacStreaminfoFormat decode.Group
+var flacPicture decode.Group
+var vorbisCommentFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.FLAC_METADATABLOCK,
 		Description: "FLAC metadatablock",
 		DecodeFn:    metadatablockDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.FLAC_STREAMINFO}, Formats: &flacStreaminfoFormat},
-			{Names: []string{format.FLAC_PICTURE}, Formats: &flacPicture},
-			{Names: []string{format.VORBIS_COMMENT}, Formats: &vorbisCommentFormat},
+			{Names: []string{format.FLAC_STREAMINFO}, Group: &flacStreaminfoFormat},
+			{Names: []string{format.FLAC_PICTURE}, Group: &flacPicture},
+			{Names: []string{format.VORBIS_COMMENT}, Group: &vorbisCommentFormat},
 		},
 	})
 }

format/flac/flac_metadatablocks.go

@@ -8,17 +8,17 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var flacMetadatablockForamt []*decode.Format
+var flacMetadatablockForamt decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.FLAC_METADATABLOCKS,
 		Description: "FLAC metadatablocks",
 		DecodeFn:    metadatablocksDecode,
 		RootArray:   true,
 		RootName:    "metadatablocks",
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.FLAC_METADATABLOCK}, Formats: &flacMetadatablockForamt},
+			{Names: []string{format.FLAC_METADATABLOCK}, Group: &flacMetadatablockForamt},
 		},
 	})
 }

format/flac/flac_picture.go

@@ -6,7 +6,7 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var images []*decode.Format
+var images decode.Group
 
 var pictureTypeNames = decode.UToStr{
 	0:  "Other",
@@ -33,12 +33,12 @@ var pictureTypeNames = decode.UToStr{
 }
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.FLAC_PICTURE,
 		Description: "FLAC metadatablock picture",
 		DecodeFn:    pictureDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.IMAGE}, Formats: &images},
+			{Names: []string{format.IMAGE}, Group: &images},
 		},
 	})
 }

format/flac/flac_streaminfo.go

@@ -7,7 +7,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.FLAC_STREAMINFO,
 		Description: "FLAC streaminfo",
 		DecodeFn:    streaminfoDecode,

format/flv/flv.go

@@ -13,7 +13,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.FLV,
 		Description: "Flash video",
 		Groups:      []string{format.PROBE},

format/gif/gif.go

@@ -16,7 +16,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.GIF,
 		Description: "Graphics Interchange Format",
 		Groups:      []string{format.PROBE, format.IMAGE},

format/gzip/gzip.go

@@ -16,16 +16,16 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var probeFormat []*decode.Format
+var probeFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.GZIP,
 		Description: "gzip compression",
 		Groups:      []string{format.PROBE},
 		DecodeFn:    gzDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.PROBE}, Formats: &probeFormat},
+			{Names: []string{format.PROBE}, Group: &probeFormat},
 		},
 	})
 }

format/icc/icc_profile.go

@@ -11,7 +11,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.ICC_PROFILE,
 		Description: "International Color Consortium profile",
 		DecodeFn:    iccProfileDecode,

format/id3/id3v1.go

@@ -9,7 +9,7 @@ import (
 // TODO: comment 28 long, zero byte, track number
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.ID3V1,
 		Description: "ID3v1 metadata",
 		DecodeFn:    id3v1Decode,

format/id3/id3v11.go

@@ -7,7 +7,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.ID3V11,
 		Description: "ID3v1.1 metadata",
 		DecodeFn:    id3v11Decode,

format/id3/id3v2.go

@@ -17,15 +17,15 @@ import (
 	"golang.org/x/text/encoding/unicode"
 )
 
-var imageFormat []*decode.Format
+var imageFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.ID3V2,
 		Description: "ID3v2 metadata",
 		DecodeFn:    id3v2Decode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.IMAGE}, Formats: &imageFormat},
+			{Names: []string{format.IMAGE}, Group: &imageFormat},
 		},
 	})
 }

format/jpeg/jpeg.go

@@ -13,18 +13,18 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var exifFormat []*decode.Format
-var iccProfileFormat []*decode.Format
+var exifFormat decode.Group
+var iccProfileFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.JPEG,
 		Description: "Joint Photographic Experts Group file",
 		Groups:      []string{format.PROBE, format.IMAGE},
 		DecodeFn:    jpegDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.EXIF}, Formats: &exifFormat},
-			{Names: []string{format.ICC_PROFILE}, Formats: &iccProfileFormat},
+			{Names: []string{format.EXIF}, Group: &exifFormat},
+			{Names: []string{format.ICC_PROFILE}, Group: &iccProfileFormat},
 		},
 	})
 }

format/json/json.go

@@ -9,7 +9,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.JSON,
 		Description: "JSON",
 		ProbeOrder:  100, // last

format/matroska/matroska.go

@@ -28,59 +28,59 @@ import (
 //go:embed *.jq
 var matroskaFS embed.FS
 
-var aacFrameFormat []*decode.Format
-var av1CCRFormat []*decode.Format
-var av1FrameFormat []*decode.Format
-var flacFrameFormat []*decode.Format
-var flacMetadatablocksFormat []*decode.Format
-var imageFormat []*decode.Format
-var mp3FrameFormat []*decode.Format
-var mpegASCFrameFormat []*decode.Format
-var mpegAVCAUFormat []*decode.Format
-var mpegAVCDCRFormat []*decode.Format
-var mpegHEVCDCRFormat []*decode.Format
-var mpegHEVCSampleFormat []*decode.Format
-var mpegPESPacketSampleFormat []*decode.Format
-var mpegSPUFrameFormat []*decode.Format
-var opusPacketFrameFormat []*decode.Format
-var vorbisPacketFormat []*decode.Format
-var vp8FrameFormat []*decode.Format
-var vp9CFMFormat []*decode.Format
-var vp9FrameFormat []*decode.Format
+var aacFrameFormat decode.Group
+var av1CCRFormat decode.Group
+var av1FrameFormat decode.Group
+var flacFrameFormat decode.Group
+var flacMetadatablocksFormat decode.Group
+var imageFormat decode.Group
+var mp3FrameFormat decode.Group
+var mpegASCFrameFormat decode.Group
+var mpegAVCAUFormat decode.Group
+var mpegAVCDCRFormat decode.Group
+var mpegHEVCDCRFormat decode.Group
+var mpegHEVCSampleFormat decode.Group
+var mpegPESPacketSampleFormat decode.Group
+var mpegSPUFrameFormat decode.Group
+var opusPacketFrameFormat decode.Group
+var vorbisPacketFormat decode.Group
+var vp8FrameFormat decode.Group
+var vp9CFMFormat decode.Group
+var vp9FrameFormat decode.Group
 
-var codecToFormat map[string]*[]*decode.Format
+var codecToFormat map[string]*decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.MATROSKA,
 		Description: "Matroska file",
 		Groups:      []string{format.PROBE},
 		DecodeFn:    matroskaDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.AAC_FRAME}, Formats: &aacFrameFormat},
-			{Names: []string{format.AV1_CCR}, Formats: &av1CCRFormat},
-			{Names: []string{format.AV1_FRAME}, Formats: &av1FrameFormat},
-			{Names: []string{format.AVC_AU}, Formats: &mpegAVCAUFormat},
-			{Names: []string{format.AVC_DCR}, Formats: &mpegAVCDCRFormat},
-			{Names: []string{format.FLAC_FRAME}, Formats: &flacFrameFormat},
-			{Names: []string{format.FLAC_METADATABLOCKS}, Formats: &flacMetadatablocksFormat},
-			{Names: []string{format.HEVC_AU}, Formats: &mpegHEVCSampleFormat},
-			{Names: []string{format.HEVC_DCR}, Formats: &mpegHEVCDCRFormat},
-			{Names: []string{format.IMAGE}, Formats: &imageFormat},
-			{Names: []string{format.MP3_FRAME}, Formats: &mp3FrameFormat},
-			{Names: []string{format.MPEG_ASC}, Formats: &mpegASCFrameFormat},
-			{Names: []string{format.MPEG_PES_PACKET}, Formats: &mpegPESPacketSampleFormat},
-			{Names: []string{format.MPEG_SPU}, Formats: &mpegSPUFrameFormat},
-			{Names: []string{format.OPUS_PACKET}, Formats: &opusPacketFrameFormat},
-			{Names: []string{format.VORBIS_PACKET}, Formats: &vorbisPacketFormat},
-			{Names: []string{format.VP8_FRAME}, Formats: &vp8FrameFormat},
-			{Names: []string{format.VP9_CFM}, Formats: &vp9CFMFormat},
-			{Names: []string{format.VP9_FRAME}, Formats: &vp9FrameFormat},
+			{Names: []string{format.AAC_FRAME}, Group: &aacFrameFormat},
+			{Names: []string{format.AV1_CCR}, Group: &av1CCRFormat},
+			{Names: []string{format.AV1_FRAME}, Group: &av1FrameFormat},
+			{Names: []string{format.AVC_AU}, Group: &mpegAVCAUFormat},
+			{Names: []string{format.AVC_DCR}, Group: &mpegAVCDCRFormat},
+			{Names: []string{format.FLAC_FRAME}, Group: &flacFrameFormat},
+			{Names: []string{format.FLAC_METADATABLOCKS}, Group: &flacMetadatablocksFormat},
+			{Names: []string{format.HEVC_AU}, Group: &mpegHEVCSampleFormat},
+			{Names: []string{format.HEVC_DCR}, Group: &mpegHEVCDCRFormat},
+			{Names: []string{format.IMAGE}, Group: &imageFormat},
+			{Names: []string{format.MP3_FRAME}, Group: &mp3FrameFormat},
+			{Names: []string{format.MPEG_ASC}, Group: &mpegASCFrameFormat},
+			{Names: []string{format.MPEG_PES_PACKET}, Group: &mpegPESPacketSampleFormat},
+			{Names: []string{format.MPEG_SPU}, Group: &mpegSPUFrameFormat},
+			{Names: []string{format.OPUS_PACKET}, Group: &opusPacketFrameFormat},
+			{Names: []string{format.VORBIS_PACKET}, Group: &vorbisPacketFormat},
+			{Names: []string{format.VP8_FRAME}, Group: &vp8FrameFormat},
+			{Names: []string{format.VP9_CFM}, Group: &vp9CFMFormat},
+			{Names: []string{format.VP9_FRAME}, Group: &vp9FrameFormat},
 		},
 		Files: matroskaFS,
 	})
 
-	codecToFormat = map[string]*[]*decode.Format{
+	codecToFormat = map[string]*decode.Group{
 		"A_VORBIS":         &vorbisPacketFormat,
 		"A_MPEG/L3":        &mp3FrameFormat,
 		"A_FLAC":           &flacFrameFormat,

format/mp3/mp3.go

@@ -9,25 +9,25 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var headerFormat []*decode.Format
-var footerFormat []*decode.Format
-var mp3Frame []*decode.Format
+var headerFormat decode.Group
+var footerFormat decode.Group
+var mp3Frame decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.MP3,
 		ProbeOrder:  20, // after most others (silent samples and jpeg header can look like mp3 sync)
 		Description: "MP3 file",
 		Groups:      []string{format.PROBE},
 		DecodeFn:    mp3Decode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.ID3V2}, Formats: &headerFormat},
+			{Names: []string{format.ID3V2}, Group: &headerFormat},
 			{Names: []string{
 				format.ID3V1,
 				format.ID3V11,
 				format.APEV2,
-			}, Formats: &footerFormat},
-			{Names: []string{format.MP3_FRAME}, Formats: &mp3Frame},
+			}, Group: &footerFormat},
+			{Names: []string{format.MP3_FRAME}, Group: &mp3Frame},
 		},
 	})
 }

format/mp3/xing.go

@@ -9,7 +9,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.XING,
 		Description: "Xing header",
 		DecodeFn:    xingDecode,

format/mp4/mp4.go

@@ -27,30 +27,30 @@ import (
 //go:embed *.jq
 var mp4FS embed.FS
 
-var aacFrameFormat []*decode.Format
-var av1CCRFormat []*decode.Format
-var av1FrameFormat []*decode.Format
-var flacFrameFormat []*decode.Format
-var flacMetadatablocksFormat []*decode.Format
-var id3v2Format []*decode.Format
-var imageFormat []*decode.Format
-var jpegFormat []*decode.Format
-var mp3FrameFormat []*decode.Format
-var mpegAVCAUFormat []*decode.Format
-var mpegAVCDCRFormat []*decode.Format
-var mpegESFormat []*decode.Format
-var mpegHEVCDCRFrameFormat []*decode.Format
-var mpegHEVCSampleFormat []*decode.Format
-var mpegPESPacketSampleFormat []*decode.Format
-var opusPacketFrameFormat []*decode.Format
-var protoBufWidevineFormat []*decode.Format
-var psshPlayreadyFormat []*decode.Format
-var vorbisPacketFormat []*decode.Format
-var vp9FrameFormat []*decode.Format
-var vpxCCRFormat []*decode.Format
+var aacFrameFormat decode.Group
+var av1CCRFormat decode.Group
+var av1FrameFormat decode.Group
+var flacFrameFormat decode.Group
+var flacMetadatablocksFormat decode.Group
+var id3v2Format decode.Group
+var imageFormat decode.Group
+var jpegFormat decode.Group
+var mp3FrameFormat decode.Group
+var mpegAVCAUFormat decode.Group
+var mpegAVCDCRFormat decode.Group
+var mpegESFormat decode.Group
+var mpegHEVCDCRFrameFormat decode.Group
+var mpegHEVCSampleFormat decode.Group
+var mpegPESPacketSampleFormat decode.Group
+var opusPacketFrameFormat decode.Group
+var protoBufWidevineFormat decode.Group
+var psshPlayreadyFormat decode.Group
+var vorbisPacketFormat decode.Group
+var vp9FrameFormat decode.Group
+var vpxCCRFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.MP4,
 		Description: "MPEG-4 file and similar",
 		Groups: []string{
@@ -59,27 +59,27 @@ func init() {
 		},
 		DecodeFn: mp4Decode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.AAC_FRAME}, Formats: &aacFrameFormat},
-			{Names: []string{format.AV1_CCR}, Formats: &av1CCRFormat},
-			{Names: []string{format.AV1_FRAME}, Formats: &av1FrameFormat},
-			{Names: []string{format.FLAC_FRAME}, Formats: &flacFrameFormat},
-			{Names: []string{format.FLAC_METADATABLOCKS}, Formats: &flacMetadatablocksFormat},
-			{Names: []string{format.ID3V2}, Formats: &id3v2Format},
-			{Names: []string{format.IMAGE}, Formats: &imageFormat},
-			{Names: []string{format.JPEG}, Formats: &jpegFormat},
-			{Names: []string{format.MP3_FRAME}, Formats: &mp3FrameFormat},
-			{Names: []string{format.AVC_AU}, Formats: &mpegAVCAUFormat},
-			{Names: []string{format.AVC_DCR}, Formats: &mpegAVCDCRFormat},
-			{Names: []string{format.MPEG_ES}, Formats: &mpegESFormat},
-			{Names: []string{format.HEVC_AU}, Formats: &mpegHEVCSampleFormat},
-			{Names: []string{format.HEVC_DCR}, Formats: &mpegHEVCDCRFrameFormat},
-			{Names: []string{format.MPEG_PES_PACKET}, Formats: &mpegPESPacketSampleFormat},
-			{Names: []string{format.OPUS_PACKET}, Formats: &opusPacketFrameFormat},
-			{Names: []string{format.PROTOBUF_WIDEVINE}, Formats: &protoBufWidevineFormat},
-			{Names: []string{format.PSSH_PLAYREADY}, Formats: &psshPlayreadyFormat},
-			{Names: []string{format.VORBIS_PACKET}, Formats: &vorbisPacketFormat},
-			{Names: []string{format.VP9_FRAME}, Formats: &vp9FrameFormat},
-			{Names: []string{format.VPX_CCR}, Formats: &vpxCCRFormat},
+			{Names: []string{format.AAC_FRAME}, Group: &aacFrameFormat},
+			{Names: []string{format.AV1_CCR}, Group: &av1CCRFormat},
+			{Names: []string{format.AV1_FRAME}, Group: &av1FrameFormat},
+			{Names: []string{format.FLAC_FRAME}, Group: &flacFrameFormat},
+			{Names: []string{format.FLAC_METADATABLOCKS}, Group: &flacMetadatablocksFormat},
+			{Names: []string{format.ID3V2}, Group: &id3v2Format},
+			{Names: []string{format.IMAGE}, Group: &imageFormat},
+			{Names: []string{format.JPEG}, Group: &jpegFormat},
+			{Names: []string{format.MP3_FRAME}, Group: &mp3FrameFormat},
+			{Names: []string{format.AVC_AU}, Group: &mpegAVCAUFormat},
+			{Names: []string{format.AVC_DCR}, Group: &mpegAVCDCRFormat},
+			{Names: []string{format.MPEG_ES}, Group: &mpegESFormat},
+			{Names: []string{format.HEVC_AU}, Group: &mpegHEVCSampleFormat},
+			{Names: []string{format.HEVC_DCR}, Group: &mpegHEVCDCRFrameFormat},
+			{Names: []string{format.MPEG_PES_PACKET}, Group: &mpegPESPacketSampleFormat},
+			{Names: []string{format.OPUS_PACKET}, Group: &opusPacketFrameFormat},
+			{Names: []string{format.PROTOBUF_WIDEVINE}, Group: &protoBufWidevineFormat},
+			{Names: []string{format.PSSH_PLAYREADY}, Group: &psshPlayreadyFormat},
+			{Names: []string{format.VORBIS_PACKET}, Group: &vorbisPacketFormat},
+			{Names: []string{format.VP9_FRAME}, Group: &vp9FrameFormat},
+			{Names: []string{format.VPX_CCR}, Group: &vpxCCRFormat},
 		},
 		Files: mp4FS,
 	})

format/mp4/pssh_playready.go

@@ -7,7 +7,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.PSSH_PLAYREADY,
 		Description: "PlayReady PSSH",
 		DecodeFn:    playreadyPsshDecode,

format/mpeg/aac_frame.go

@@ -12,7 +12,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.AAC_FRAME,
 		Description: "Advanced Audio Coding frame",
 		DecodeFn:    aacDecode,

format/mpeg/adts.go

@@ -6,10 +6,10 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var adtsFrame []*decode.Format
+var adtsFrame decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.ADTS,
 		Description: "Audio Data Transport Stream",
 		Groups:      []string{format.PROBE},
@@ -17,7 +17,7 @@ func init() {
 		RootArray:   true,
 		RootName:    "frames",
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.ADTS_FRAME}, Formats: &adtsFrame},
+			{Names: []string{format.ADTS_FRAME}, Group: &adtsFrame},
 		},
 	})
 }

format/mpeg/adts_frame.go

@@ -10,15 +10,15 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var aacFrameFormat []*decode.Format
+var aacFrameFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.ADTS_FRAME,
 		Description: "Audio Data Transport Stream frame",
 		DecodeFn:    adtsFrameDecoder,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.AAC_FRAME}, Formats: &aacFrameFormat},
+			{Names: []string{format.AAC_FRAME}, Group: &aacFrameFormat},
 		},
 	})
 }

format/mpeg/annexb.go

@@ -22,7 +22,7 @@ func annexBDecodeStartCodeLen(v uint64) int64 {
 	}
 }
 
-func annexBDecode(d *decode.D, _ interface{}, format []*decode.Format) interface{} {
+func annexBDecode(d *decode.D, _ interface{}, format decode.Group) interface{} {
 	currentOffset, currentPrefixLen, err := annexBFindStartCode(d)
 	// TODO: really restrict to 0?
 	if err != nil || currentOffset != 0 {

format/mpeg/avc_annexb.go

@@ -6,10 +6,10 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var annexBAVCNALUFormat []*decode.Format
+var annexBAVCNALUFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.AVC_ANNEXB,
 		Description: "H.264/AVC Annex B",
 		DecodeFn: func(d *decode.D, in interface{}) interface{} {
@@ -18,7 +18,7 @@ func init() {
 		RootArray: true,
 		RootName:  "stream",
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.AVC_NALU}, Formats: &annexBAVCNALUFormat},
+			{Names: []string{format.AVC_NALU}, Group: &annexBAVCNALUFormat},
 		},
 	})
 }

format/mpeg/avc_au.go

@@ -8,17 +8,17 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var avcNALUFormat []*decode.Format
+var avcNALUFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.AVC_AU,
 		Description: "H.264/AVC Access Unit",
 		DecodeFn:    avcAUDecode,
 		RootArray:   true,
 		RootName:    "access_unit",
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.AVC_NALU}, Formats: &avcNALUFormat},
+			{Names: []string{format.AVC_NALU}, Group: &avcNALUFormat},
 		},
 	})
 }

format/mpeg/avc_dcr.go

@@ -11,15 +11,15 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var avcDCRNALFormat []*decode.Format
+var avcDCRNALFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.AVC_DCR,
 		Description: "H.264/AVC Decoder Configuration Record",
 		DecodeFn:    avcDcrDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.AVC_NALU}, Formats: &avcDCRNALFormat},
+			{Names: []string{format.AVC_NALU}, Group: &avcDCRNALFormat},
 		},
 	})
 }

format/mpeg/avc_nalu.go

@@ -9,19 +9,19 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var avcSPSFormat []*decode.Format
-var avcPPSFormat []*decode.Format
-var avcSEIFormat []*decode.Format
+var avcSPSFormat decode.Group
+var avcPPSFormat decode.Group
+var avcSEIFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.AVC_NALU,
 		Description: "H.264/AVC Network Access Layer Unit",
 		DecodeFn:    avcNALUDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.AVC_SPS}, Formats: &avcSPSFormat},
-			{Names: []string{format.AVC_PPS}, Formats: &avcPPSFormat},
-			{Names: []string{format.AVC_SEI}, Formats: &avcSEIFormat},
+			{Names: []string{format.AVC_SPS}, Group: &avcSPSFormat},
+			{Names: []string{format.AVC_PPS}, Group: &avcPPSFormat},
+			{Names: []string{format.AVC_SEI}, Group: &avcSEIFormat},
 		},
 	})
 }

format/mpeg/avc_pps.go

@@ -7,7 +7,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.AVC_PPS,
 		Description: "H.264/AVC Picture Parameter Set",
 		DecodeFn:    avcPPSDecode,

format/mpeg/avc_sei.go

@@ -7,7 +7,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.AVC_SEI,
 		Description: "H.264/AVC Supplemental Enhancement Information",
 		DecodeFn:    avcSEIDecode,

format/mpeg/avc_sps.go

@@ -7,7 +7,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.AVC_SPS,
 		Description: "H.264/AVC Sequence Parameter Set",
 		DecodeFn:    avcSPSDecode,

format/mpeg/hevc_annexb.go

@@ -6,10 +6,10 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var annexBHEVCNALUFormat []*decode.Format
+var annexBHEVCNALUFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.HEVC_ANNEXB,
 		Description: "H.265/HEVC Annex B",
 		DecodeFn: func(d *decode.D, in interface{}) interface{} {
@@ -18,7 +18,7 @@ func init() {
 		RootArray: true,
 		RootName:  "stream",
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.HEVC_NALU}, Formats: &annexBHEVCNALUFormat},
+			{Names: []string{format.HEVC_NALU}, Group: &annexBHEVCNALUFormat},
 		},
 	})
 }

format/mpeg/hevc_au.go

@@ -6,17 +6,17 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var hevcAUNALFormat []*decode.Format
+var hevcAUNALFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.HEVC_AU,
 		Description: "H.265/HEVC Access Unit",
 		DecodeFn:    hevcAUDecode,
 		RootArray:   true,
 		RootName:    "access_unit",
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.HEVC_NALU}, Formats: &hevcAUNALFormat},
+			{Names: []string{format.HEVC_NALU}, Group: &hevcAUNALFormat},
 		},
 	})
 }

format/mpeg/hevc_dcr.go

@@ -6,15 +6,15 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var hevcDCRNALFormat []*decode.Format
+var hevcDCRNALFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.HEVC_DCR,
 		Description: "H.265/HEVC Decoder Configuration Record",
 		DecodeFn:    hevcDcrDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.HEVC_NALU}, Formats: &hevcDCRNALFormat},
+			{Names: []string{format.HEVC_NALU}, Group: &hevcDCRNALFormat},
 		},
 	})
 }

format/mpeg/hevc_nalu.go

@@ -7,7 +7,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:         format.HEVC_NALU,
 		Description:  "H.265/HEVC Network Access Layer Unit",
 		DecodeFn:     hevcNALUDecode,

format/mpeg/mp3_frame.go

@@ -19,15 +19,15 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var xingHeader []*decode.Format
+var xingHeader decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.MP3_FRAME,
 		Description: "MPEG audio layer 3 frame",
 		DecodeFn:    frameDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.XING}, Formats: &xingHeader},
+			{Names: []string{format.XING}, Group: &xingHeader},
 		},
 	})
 }

format/mpeg/mpeg_asc.go

@@ -9,7 +9,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.MPEG_ASC,
 		Description: "MPEG-4 Audio Specific Config",
 		DecodeFn:    ascDecoder,

format/mpeg/mpeg_es.go

@@ -9,17 +9,17 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var mpegASCFormat []*decode.Format
-var vorbisPacketFormat []*decode.Format
+var mpegASCFormat decode.Group
+var vorbisPacketFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.MPEG_ES,
 		Description: "MPEG Elementary Stream",
 		DecodeFn:    esDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.MPEG_ASC}, Formats: &mpegASCFormat},
-			{Names: []string{format.VORBIS_PACKET}, Formats: &vorbisPacketFormat},
+			{Names: []string{format.MPEG_ASC}, Group: &mpegASCFormat},
+			{Names: []string{format.VORBIS_PACKET}, Group: &vorbisPacketFormat},
 		},
 	})
 }

format/mpeg/mpeg_pes.go

@@ -13,19 +13,19 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var pesPacketFormat []*decode.Format
-var spuFormat []*decode.Format
+var pesPacketFormat decode.Group
+var spuFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.MPEG_PES,
 		Description: "MPEG Packetized elementary stream",
 		DecodeFn:    pesDecode,
 		RootArray:   true,
 		RootName:    "packets",
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.MPEG_PES_PACKET}, Formats: &pesPacketFormat},
-			{Names: []string{format.MPEG_SPU}, Formats: &spuFormat},
+			{Names: []string{format.MPEG_PES_PACKET}, Group: &pesPacketFormat},
+			{Names: []string{format.MPEG_SPU}, Group: &spuFormat},
 		},
 	})
 }

format/mpeg/mpeg_pes_packet.go

@@ -11,7 +11,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.MPEG_PES_PACKET,
 		Description: "MPEG Packetized elementary stream packet",
 		DecodeFn:    pesPacketDecode,

format/mpeg/mpeg_spu.go

@@ -14,7 +14,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.MPEG_SPU,
 		Description: "Sub Picture Unit (DVD subtitle)",
 		DecodeFn:    spuDecode,

format/mpeg/mpeg_ts.go

@@ -7,7 +7,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.MPEG_TS,
 		ProbeOrder:  10, // make sure to be after gif, both start with 0x47
 		Description: "MPEG Transport Stream",

format/ogg/ogg.go

@@ -12,26 +12,26 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var oggPageFormat []*decode.Format
-var vorbisPacketFormat []*decode.Format
-var vorbisCommentFormat []*decode.Format
-var opusPacketFormat []*decode.Format
-var flacMetadatablockFormat []*decode.Format
-var flacFrameFormat []*decode.Format
+var oggPageFormat decode.Group
+var vorbisPacketFormat decode.Group
+var vorbisCommentFormat decode.Group
+var opusPacketFormat decode.Group
+var flacMetadatablockFormat decode.Group
+var flacFrameFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.OGG,
 		Description: "OGG file",
 		Groups:      []string{format.PROBE},
 		DecodeFn:    decodeOgg,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.OGG_PAGE}, Formats: &oggPageFormat},
-			{Names: []string{format.VORBIS_PACKET}, Formats: &vorbisPacketFormat},
-			{Names: []string{format.VORBIS_COMMENT}, Formats: &vorbisCommentFormat},
-			{Names: []string{format.OPUS_PACKET}, Formats: &opusPacketFormat},
-			{Names: []string{format.FLAC_METADATABLOCK}, Formats: &flacMetadatablockFormat},
-			{Names: []string{format.FLAC_FRAME}, Formats: &flacFrameFormat},
+			{Names: []string{format.OGG_PAGE}, Group: &oggPageFormat},
+			{Names: []string{format.VORBIS_PACKET}, Group: &vorbisPacketFormat},
+			{Names: []string{format.VORBIS_COMMENT}, Group: &vorbisCommentFormat},
+			{Names: []string{format.OPUS_PACKET}, Group: &opusPacketFormat},
+			{Names: []string{format.FLAC_METADATABLOCK}, Group: &flacMetadatablockFormat},
+			{Names: []string{format.FLAC_FRAME}, Group: &flacFrameFormat},
 		},
 	})
 }

format/ogg/ogg_page.go

@@ -11,7 +11,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.OGG_PAGE,
 		Description: "OGG page",
 		DecodeFn:    pageDecode,

format/opus/opus_packet.go

@@ -10,15 +10,15 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var vorbisComment []*decode.Format
+var vorbisComment decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.OPUS_PACKET,
 		Description: "Opus packet",
 		DecodeFn:    opusDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.VORBIS_COMMENT}, Formats: &vorbisComment},
+			{Names: []string{format.VORBIS_COMMENT}, Group: &vorbisComment},
 		},
 	})
 }

format/png/png.go

@@ -15,18 +15,18 @@ import (
 	"github.com/wader/fq/pkg/ranges"
 )
 
-var iccProfileFormat []*decode.Format
-var exifFormat []*decode.Format
+var iccProfileFormat decode.Group
+var exifFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.PNG,
 		Description: "Portable Network Graphics file",
 		Groups:      []string{format.PROBE, format.IMAGE},
 		DecodeFn:    pngDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.ICC_PROFILE}, Formats: &iccProfileFormat},
-			{Names: []string{format.EXIF}, Formats: &exifFormat},
+			{Names: []string{format.ICC_PROFILE}, Group: &iccProfileFormat},
+			{Names: []string{format.EXIF}, Group: &exifFormat},
 		},
 	})
 }

format/protobuf/protobuf.go

@@ -8,7 +8,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.PROTOBUF,
 		Description: "Protobuf",
 		DecodeFn:    protobufDecode,

format/protobuf/protobuf_widevine.go

@@ -8,15 +8,15 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var widevineProtoBufFormat []*decode.Format
+var widevineProtoBufFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.PROTOBUF_WIDEVINE,
 		Description: "Widevine protobuf",
 		DecodeFn:    widevineDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.PROTOBUF}, Formats: &widevineProtoBufFormat},
+			{Names: []string{format.PROTOBUF}, Group: &widevineProtoBufFormat},
 		},
 	})
 }

format/raw/raw.go

@@ -7,7 +7,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.RAW,
 		Description: "Raw bits",
 		DecodeFn:    func(d *decode.D, in interface{}) interface{} { return nil },

format/registry/default.go

@@ -1,12 +0,0 @@
-package registry
-
-import (
-	"github.com/wader/fq/pkg/decode"
-)
-
-// Default global registry that all standard formats register with
-var Default = New()
-
-func MustRegister(format *decode.Format) *decode.Format {
-	return Default.MustRegister(format)
-}

format/registry/registry.go

@@ -1,115 +1,13 @@
 package registry
 
 import (
-	"errors"
-	"fmt"
-	"sort"
-	"sync"
-
 	"github.com/wader/fq/pkg/decode"
+	"github.com/wader/fq/pkg/decode/registry"
 )
 
-type Registry struct {
-	Groups      map[string][]*decode.Format
-	resolveOnce sync.Once
-	resolved    bool
-}
-
-func New() *Registry {
-	return &Registry{
-		Groups:      map[string][]*decode.Format{},
-		resolveOnce: sync.Once{},
-	}
-}
-
-func (r *Registry) register(groupName string, format *decode.Format, single bool) *decode.Format { //nolint:unparam
-	if r.resolved {
-		// for now can't change after resolved
-		panic("registry already resolved")
-	}
-
-	formats, ok := r.Groups[groupName]
-	if ok {
-		if !single {
-			panic(fmt.Sprintf("%s: format already registered", groupName))
-		}
-	} else {
-		formats = []*decode.Format{}
-	}
-
-	r.Groups[groupName] = append(formats, format)
-
-	return format
-}
-
-func (r *Registry) MustRegister(format *decode.Format) *decode.Format {
-	r.register(format.Name, format, false)
-	for _, g := range format.Groups {
-		r.register(g, format, true)
-	}
-	r.register("all", format, true)
-
-	return format
-}
-
-func sortFormats(fs []*decode.Format) {
-	sort.Slice(fs, func(i, j int) bool {
-		if fs[i].ProbeOrder == fs[j].ProbeOrder {
-			return fs[i].Name < fs[j].Name
-		}
-		return fs[i].ProbeOrder < fs[j].ProbeOrder
-	})
-}
-
-func (r *Registry) resolve() error {
-	for _, fs := range r.Groups {
-		for _, f := range fs {
-			for _, d := range f.Dependencies {
-				var formats []*decode.Format
-				for _, dName := range d.Names {
-					df, ok := r.Groups[dName]
-					if !ok {
-						return fmt.Errorf("%s: can't find format dependency %s", f.Name, dName)
-					}
-					formats = append(formats, df...)
-				}
-
-				sortFormats(formats)
-				*d.Formats = formats
-			}
-		}
-	}
-
-	for _, fs := range r.Groups {
-		sortFormats(fs)
-	}
-
-	r.resolved = true
-
-	return nil
-}
-
-func (r *Registry) Group(name string) ([]*decode.Format, error) {
-	r.resolveOnce.Do(func() {
-		if err := r.resolve(); err != nil {
-			panic(err)
-		}
-	})
-
-	if g, ok := r.Groups[name]; ok {
-		return g, nil
-	}
-	return nil, errors.New("format group not found")
-}
-
-func (r *Registry) MustGroup(name string) []*decode.Format {
-	g, err := r.Group(name)
-	if err == nil {
-		return g
-	}
-	panic(err)
-}
-
-func (r *Registry) MustAll() []*decode.Format {
-	return r.MustGroup("all")
+// Default global registry that all builtin formats register with
+var Default = registry.New()
+
+func MustRegister(format decode.Format) {
+	Default.MustRegister(format)
 }

format/tar/tar.go

@@ -13,16 +13,16 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var probeFormat []*decode.Format
+var probeFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.TAR,
 		Description: "Tar archive",
 		Groups:      []string{format.PROBE},
 		DecodeFn:    tarDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.PROBE}, Formats: &probeFormat},
+			{Names: []string{format.PROBE}, Group: &probeFormat},
 		},
 	})
 }

format/tiff/exif.go

@@ -12,7 +12,7 @@ import (
 // currently just a alias for tiff
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.EXIF,
 		Description: "Exchangeable Image File Format",
 		Groups:      []string{},

format/tiff/tiff.go

@@ -8,16 +8,16 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var tiffIccProfile []*decode.Format
+var tiffIccProfile decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.TIFF,
 		Description: "Tag Image File Format",
 		Groups:      []string{format.PROBE, format.IMAGE},
 		DecodeFn:    tiffDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.ICC_PROFILE}, Formats: &tiffIccProfile},
+			{Names: []string{format.ICC_PROFILE}, Group: &tiffIccProfile},
 		},
 	})
 }

format/vorbis/vorbis_comment.go

@@ -10,15 +10,15 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var flacPicture []*decode.Format
+var flacPicture decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.VORBIS_COMMENT,
 		Description: "Vorbis comment",
 		DecodeFn:    commentDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.FLAC_PICTURE}, Formats: &flacPicture},
+			{Names: []string{format.FLAC_PICTURE}, Group: &flacPicture},
 		},
 	})
 }

format/vorbis/vorbis_packet.go

@@ -10,15 +10,15 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var vorbisComment []*decode.Format
+var vorbisComment decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.VORBIS_PACKET,
 		Description: "Vorbis packet",
 		DecodeFn:    vorbisDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.VORBIS_COMMENT}, Formats: &vorbisComment},
+			{Names: []string{format.VORBIS_COMMENT}, Group: &vorbisComment},
 		},
 	})
 }

format/vpx/vp8_frame.go

@@ -11,7 +11,7 @@ import (
 // TODO: vpx frame?
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.VP8_FRAME,
 		Description: "VP8 frame",
 		DecodeFn:    vp8Decode,

format/vpx/vp9_cfm.go

@@ -9,7 +9,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.VP9_CFM,
 		Description: "VP9 Codec Feature Metadata",
 		DecodeFn:    vp9CFMDecode,

format/vpx/vp9_frame.go

@@ -48,7 +48,7 @@ var vp9ColorSpaceNames = decode.UToStr{
 }
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.VP9_FRAME,
 		Description: "VP9 frame",
 		DecodeFn:    vp9Decode,

format/vpx/vpx_ccr.go

@@ -9,7 +9,7 @@ import (
 )
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.VPX_CCR,
 		Description: "VPX Codec Configuration Record",
 		DecodeFn:    vpxCCRDecode,

format/wav/wav.go

@@ -16,19 +16,19 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var headerFormat []*decode.Format
-var footerFormat []*decode.Format
+var headerFormat decode.Group
+var footerFormat decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.WAV,
 		ProbeOrder:  10, // after most others (overlap some with webp)
 		Description: "WAV file",
 		Groups:      []string{format.PROBE},
 		DecodeFn:    wavDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.ID3V2}, Formats: &headerFormat},
-			{Names: []string{format.ID3V1, format.ID3V11}, Formats: &footerFormat},
+			{Names: []string{format.ID3V2}, Group: &headerFormat},
+			{Names: []string{format.ID3V1, format.ID3V11}, Group: &footerFormat},
 		},
 	})
 }

format/webp/webp.go

@@ -10,16 +10,16 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-var vp8Frame []*decode.Format
+var vp8Frame decode.Group
 
 func init() {
-	registry.MustRegister(&decode.Format{
+	registry.MustRegister(decode.Format{
 		Name:        format.WEBP,
 		Description: "WebP image",
 		Groups:      []string{format.PROBE, format.IMAGE},
 		DecodeFn:    webpDecode,
 		Dependencies: []decode.Dependency{
-			{Names: []string{format.VP8_FRAME}, Formats: &vp8Frame},
+			{Names: []string{format.VP8_FRAME}, Group: &vp8Frame},
 		},
 	})
 }

pkg/cli/cli.go

@@ -12,7 +12,7 @@ import (
 	"os/signal"
 	"path/filepath"
 
-	"github.com/wader/fq/format/registry"
+	"github.com/wader/fq/pkg/decode/registry"
 	"github.com/wader/fq/pkg/interp"
 
 	"github.com/wader/readline"

pkg/decode/decode.go

@@ -33,34 +33,34 @@ type Options struct {
 	ReadBuf       *[]byte
 }
 
-// Decode try decode formats and return first success and all other decoder errors
-func Decode(ctx context.Context, bb *bitio.Buffer, formats []*Format, opts Options) (*Value, interface{}, error) {
-	return decode(ctx, bb, formats, opts)
+// Decode try decode group and return first success and all other decoder errors
+func Decode(ctx context.Context, bb *bitio.Buffer, group Group, opts Options) (*Value, interface{}, error) {
+	return decode(ctx, bb, group, opts)
 }
 
-func decode(ctx context.Context, bb *bitio.Buffer, formats []*Format, opts Options) (*Value, interface{}, error) {
+func decode(ctx context.Context, bb *bitio.Buffer, group Group, opts Options) (*Value, interface{}, error) {
 	decodeRange := opts.Range
 	if decodeRange.IsZero() {
 		decodeRange = ranges.Range{Len: bb.Len()}
 	}
 
-	if formats == nil {
-		panic("formats is nil, failed to register format?")
+	if group == nil {
+		panic("group is nil, failed to register format?")
 	}
 
-	decodeErr := FormatsError{}
+	formatsErr := FormatsError{}
 
-	for _, f := range formats {
+	for _, g := range group {
 		cbb, err := bb.BitBufRange(decodeRange.Start, decodeRange.Len)
 		if err != nil {
 			return nil, nil, IOError{Err: err, Op: "BitBufRange", ReadSize: decodeRange.Len, Pos: decodeRange.Start}
 		}
 
-		d := newDecoder(ctx, f, cbb, opts)
+		d := newDecoder(ctx, g, cbb, opts)
 
 		var decodeV interface{}
 		r, rOk := recoverfn.Run(func() {
-			decodeV = f.DecodeFn(d, opts.FormatInArg)
+			decodeV = g.DecodeFn(d, opts.FormatInArg)
 		})
 
 		if ctx != nil && ctx.Err() != nil {
@@ -72,10 +72,10 @@ func decode(ctx context.Context, bb *bitio.Buffer, formats []*Format, opts Optio
 				panicErr, _ := re.(error)
 				formatErr := FormatError{
 					Err:        panicErr,
-					Format:     f,
+					Format:     g,
 					Stacktrace: r,
 				}
-				decodeErr.Errs = append(decodeErr.Errs, formatErr)
+				formatsErr.Errs = append(formatsErr.Errs, formatErr)
 
 				switch vv := d.Value.V.(type) {
 				case Compound:
@@ -84,7 +84,7 @@ func decode(ctx context.Context, bb *bitio.Buffer, formats []*Format, opts Optio
 					d.Value.V = vv
 				}
 
-				if len(formats) != 1 {
+				if len(group) != 1 {
 					continue
 				}
 			} else {
@@ -113,10 +113,10 @@ func decode(ctx context.Context, bb *bitio.Buffer, formats []*Format, opts Optio
 			d.Value.postProcess()
 		}
 
-		return d.Value, decodeV, decodeErr
+		return d.Value, decodeV, formatsErr
 	}
 
-	return nil, nil, decodeErr
+	return nil, nil, formatsErr
 }
 
 type D struct {
@@ -132,7 +132,7 @@ type D struct {
 
 // TODO: new struct decoder?
 // note bb is assumed to be a non-shared buffer
-func newDecoder(ctx context.Context, format *Format, bb *bitio.Buffer, opts Options) *D {
+func newDecoder(ctx context.Context, format Format, bb *bitio.Buffer, opts Options) *D {
 	name := format.RootName
 	if opts.Name != "" {
 		name = opts.Name
@@ -141,7 +141,7 @@ func newDecoder(ctx context.Context, format *Format, bb *bitio.Buffer, opts Opti
 		IsArray:     format.RootArray,
 		Children:    new([]*Value),
 		Description: opts.Description,
-		Format:      format,
+		Format:      &format,
 	}
 
 	return &D{
@@ -652,8 +652,8 @@ func (d *D) RangeFn(firstBit int64, nBits int64, fn func(d *D)) {
 	}
 }
 
-func (d *D) Format(formats []*Format, inArg interface{}) interface{} {
-	dv, v, err := decode(d.Ctx, d.bitBuf, formats, Options{
+func (d *D) Format(group Group, inArg interface{}) interface{} {
+	dv, v, err := decode(d.Ctx, d.bitBuf, group, Options{
 		Force:       d.Options.Force,
 		FillGaps:    false,
 		IsRoot:      false,
@@ -681,8 +681,8 @@ func (d *D) Format(formats []*Format, inArg interface{}) interface{} {
 	return v
 }
 
-func (d *D) FieldTryFormat(name string, formats []*Format, inArg interface{}) (*Value, interface{}, error) {
-	dv, v, err := decode(d.Ctx, d.bitBuf, formats, Options{
+func (d *D) FieldTryFormat(name string, group Group, inArg interface{}) (*Value, interface{}, error) {
+	dv, v, err := decode(d.Ctx, d.bitBuf, group, Options{
 		Name:        name,
 		Force:       d.Options.Force,
 		FillGaps:    false,
@@ -703,16 +703,16 @@ func (d *D) FieldTryFormat(name string, formats []*Format, inArg interface{}) (*
 	return dv, v, err
 }
 
-func (d *D) FieldFormat(name string, formats []*Format, inArg interface{}) (*Value, interface{}) {
-	dv, v, err := d.FieldTryFormat(name, formats, inArg)
+func (d *D) FieldFormat(name string, group Group, inArg interface{}) (*Value, interface{}) {
+	dv, v, err := d.FieldTryFormat(name, group, inArg)
 	if dv == nil || dv.Errors() != nil {
 		panic(err)
 	}
 	return dv, v
 }
 
-func (d *D) FieldTryFormatLen(name string, nBits int64, formats []*Format, inArg interface{}) (*Value, interface{}, error) {
-	dv, v, err := decode(d.Ctx, d.bitBuf, formats, Options{
+func (d *D) FieldTryFormatLen(name string, nBits int64, group Group, inArg interface{}) (*Value, interface{}, error) {
+	dv, v, err := decode(d.Ctx, d.bitBuf, group, Options{
 		Name:        name,
 		Force:       d.Options.Force,
 		FillGaps:    true,
@@ -733,8 +733,8 @@ func (d *D) FieldTryFormatLen(name string, nBits int64, formats []*Format, inArg
 	return dv, v, err
 }
 
-func (d *D) FieldFormatLen(name string, nBits int64, formats []*Format, inArg interface{}) (*Value, interface{}) {
-	dv, v, err := d.FieldTryFormatLen(name, nBits, formats, inArg)
+func (d *D) FieldFormatLen(name string, nBits int64, group Group, inArg interface{}) (*Value, interface{}) {
+	dv, v, err := d.FieldTryFormatLen(name, nBits, group, inArg)
 	if dv == nil || dv.Errors() != nil {
 		panic(err)
 	}
@@ -742,8 +742,8 @@ func (d *D) FieldFormatLen(name string, nBits int64, formats []*Format, inArg in
 }
 
 // TODO: return decooder?
-func (d *D) FieldTryFormatRange(name string, firstBit int64, nBits int64, formats []*Format, inArg interface{}) (*Value, interface{}, error) {
-	dv, v, err := decode(d.Ctx, d.bitBuf, formats, Options{
+func (d *D) FieldTryFormatRange(name string, firstBit int64, nBits int64, group Group, inArg interface{}) (*Value, interface{}, error) {
+	dv, v, err := decode(d.Ctx, d.bitBuf, group, Options{
 		Name:        name,
 		Force:       d.Options.Force,
 		FillGaps:    true,
@@ -761,8 +761,8 @@ func (d *D) FieldTryFormatRange(name string, firstBit int64, nBits int64, format
 	return dv, v, err
 }
 
-func (d *D) FieldFormatRange(name string, firstBit int64, nBits int64, formats []*Format, inArg interface{}) (*Value, interface{}) {
-	dv, v, err := d.FieldTryFormatRange(name, firstBit, nBits, formats, inArg)
+func (d *D) FieldFormatRange(name string, firstBit int64, nBits int64, group Group, inArg interface{}) (*Value, interface{}) {
+	dv, v, err := d.FieldTryFormatRange(name, firstBit, nBits, group, inArg)
 	if dv == nil || dv.Errors() != nil {
 		panic(err)
 	}
@@ -770,8 +770,8 @@ func (d *D) FieldFormatRange(name string, firstBit int64, nBits int64, formats [
 	return dv, v
 }
 
-func (d *D) FieldTryFormatBitBuf(name string, bb *bitio.Buffer, formats []*Format, inArg interface{}) (*Value, interface{}, error) {
-	dv, v, err := decode(d.Ctx, bb, formats, Options{
+func (d *D) FieldTryFormatBitBuf(name string, bb *bitio.Buffer, group Group, inArg interface{}) (*Value, interface{}, error) {
+	dv, v, err := decode(d.Ctx, bb, group, Options{
 		Name:        name,
 		Force:       d.Options.Force,
 		FillGaps:    true,
@@ -788,8 +788,8 @@ func (d *D) FieldTryFormatBitBuf(name string, bb *bitio.Buffer, formats []*Forma
 	return dv, v, err
 }
 
-func (d *D) FieldFormatBitBuf(name string, bb *bitio.Buffer, formats []*Format, inArg interface{}) (*Value, interface{}) {
-	dv, v, err := d.FieldTryFormatBitBuf(name, bb, formats, inArg)
+func (d *D) FieldFormatBitBuf(name string, bb *bitio.Buffer, group Group, inArg interface{}) (*Value, interface{}) {
+	dv, v, err := d.FieldTryFormatBitBuf(name, bb, group, inArg)
 	if dv == nil || dv.Errors() != nil {
 		panic(err)
 	}
@@ -819,7 +819,7 @@ func (d *D) FieldStructRootBitBufFn(name string, bb *bitio.Buffer, fn func(d *D)
 }
 
 // TODO: range?
-func (d *D) FieldFormatReaderLen(name string, nBits int64, fn func(r io.Reader) (io.ReadCloser, error), formats []*Format) (*Value, interface{}) {
+func (d *D) FieldFormatReaderLen(name string, nBits int64, fn func(r io.Reader) (io.ReadCloser, error), group Group) (*Value, interface{}) {
 	bb, err := d.bitBuf.BitBufLen(nBits)
 	if err != nil {
 		panic(err)
@@ -834,5 +834,5 @@ func (d *D) FieldFormatReaderLen(name string, nBits int64, fn func(r io.Reader)
 	}
 	zbb := bitio.NewBufferFromBytes(zd, -1)
 
-	return d.FieldFormatBitBuf(name, zbb, formats, nil)
+	return d.FieldFormatBitBuf(name, zbb, group, nil)
 }

pkg/decode/errors.go

@@ -14,7 +14,7 @@ type RecoverableErrorer interface {
 
 type FormatError struct {
 	Err        error
-	Format     *Format
+	Format     Format
 	Stacktrace recoverfn.Raw
 }
 

pkg/decode/format.go

@@ -2,9 +2,11 @@ package decode
 
 import "io/fs"
 
+type Group []Format
+
 type Dependency struct {
 	Names []string
-	Formats *[]*Format // TODO: rename to outFormats to make it clear it's used to assign?
+	Group *Group
 }
 
 type Format struct {
@@ -19,8 +21,8 @@ type Format struct {
 	Files        fs.ReadDirFS
 }
 
-func FormatFn(d func(d *D, in interface{}) interface{}) []*Format {
-	return []*Format{{
+func FormatFn(d func(d *D, in interface{}) interface{}) Group {
+	return Group{{
 		DecodeFn: d,
 	}}
 }

pkg/decode/registry/registry.go

@@ -0,0 +1,115 @@
+package registry
+
+import (
+	"errors"
+	"fmt"
+	"sort"
+	"sync"
+
+	"github.com/wader/fq/pkg/decode"
+)
+
+type Registry struct {
+	Groups      map[string]decode.Group
+	resolveOnce sync.Once
+	resolved    bool
+}
+
+func New() *Registry {
+	return &Registry{
+		Groups:      map[string]decode.Group{},
+		resolveOnce: sync.Once{},
+	}
+}
+
+func (r *Registry) register(groupName string, format decode.Format, single bool) decode.Format { //nolint:unparam
+	if r.resolved {
+		// for now can't change after resolved
+		panic("registry already resolved")
+	}
+
+	group, ok := r.Groups[groupName]
+	if ok {
+		if !single {
+			panic(fmt.Sprintf("%s: format already registered", groupName))
+		}
+	} else {
+		group = decode.Group{}
+	}
+
+	r.Groups[groupName] = append(group, format)
+
+	return format
+}
+
+func (r *Registry) MustRegister(format decode.Format) decode.Format {
+	r.register(format.Name, format, false)
+	for _, g := range format.Groups {
+		r.register(g, format, true)
+	}
+	r.register("all", format, true)
+
+	return format
+}
+
+func sortFormats(g decode.Group) {
+	sort.Slice(g, func(i, j int) bool {
+		if g[i].ProbeOrder == g[j].ProbeOrder {
+			return g[i].Name < g[j].Name
+		}
+		return g[i].ProbeOrder < g[j].ProbeOrder
+	})
+}
+
+func (r *Registry) resolve() error {
+	for _, fs := range r.Groups {
+		for _, f := range fs {
+			for _, d := range f.Dependencies {
+				var group decode.Group
+				for _, dName := range d.Names {
+					df, ok := r.Groups[dName]
+					if !ok {
+						return fmt.Errorf("%s: can't find format dependency %s", f.Name, dName)
+					}
+					group = append(group, df...)
+				}
+
+				sortFormats(group)
+				*d.Group = group
+			}
+		}
+	}
+
+	for _, fs := range r.Groups {
+		sortFormats(fs)
+	}
+
+	r.resolved = true
+
+	return nil
+}
+
+func (r *Registry) Group(name string) (decode.Group, error) {
+	r.resolveOnce.Do(func() {
+		if err := r.resolve(); err != nil {
+			panic(err)
+		}
+	})
+
+	if g, ok := r.Groups[name]; ok {
+		return g, nil
+	}
+	return nil, errors.New("format group not found")
+}
+
+func (r *Registry) MustGroup(name string) decode.Group {
+	g, err := r.Group(name)
+	if err == nil {
+		return g
+	}
+	panic(err)
+}
+
+func (r *Registry) MustAll() decode.Group {
+	return r.MustGroup("all")
+}

pkg/fqtest/fqtest.go

@@ -7,9 +7,9 @@ import (
 	"strconv"
 	"testing"
 
-	"github.com/wader/fq/format/registry"
 	"github.com/wader/fq/internal/difftest"
 	"github.com/wader/fq/internal/script"
+	"github.com/wader/fq/pkg/decode/registry"
 	"github.com/wader/fq/pkg/interp"
 )
 

pkg/interp/funcs.go

@@ -155,7 +155,7 @@ func makeHashFn(fn func() (hash.Hash, error)) func(c interface{}, a []interface{
 }
 
 func (i *Interp) _registry(c interface{}, a []interface{}) interface{} {
-	uniqueFormats := map[string]*decode.Format{}
+	uniqueFormats := map[string]decode.Format{}
 
 	groups := map[string]interface{}{}
 	formats := map[string]interface{}{}

pkg/interp/interp.go

@@ -18,7 +18,6 @@ import (
 	"time"
 
 	"github.com/mitchellh/mapstructure"
-	"github.com/wader/fq/format/registry"
 	"github.com/wader/fq/internal/ansi"
 	"github.com/wader/fq/internal/colorjson"
 	"github.com/wader/fq/internal/ctxstack"
@@ -27,6 +26,7 @@ import (
 	"github.com/wader/fq/internal/pos"
 	"github.com/wader/fq/pkg/bitio"
 	"github.com/wader/fq/pkg/decode"
+	"github.com/wader/fq/pkg/decode/registry"
 
 	"github.com/wader/gojq"
 )