format: Cleanup comments

format/all/all.go

@@ -1,4 +1,4 @@
-// Package all imports all standard formats
+// Package all imports and registers all formats in the default registry
 package all
 
 import (

format/flac/flac.go

@@ -2,9 +2,6 @@ package flac
 
 // https://xiph.org/flac/format.html
 
-// TODO: reuse samples buffer
-// TODO: mime audio/x-flac
-
 import (
 	"bytes"
 	"crypto/md5"

format/flac/flac_frame.go

@@ -1,7 +1,5 @@
 package flac
 
-// TODO: reuse samples buffer. pass in buf?
-
 import (
 	"encoding/binary"
 	"fmt"

format/gif/gif.go

@@ -6,7 +6,6 @@ package gif
 
 // TODO: local color map
 // TODO: bit depth done correct?
-// TDOO: mime mage/gif
 
 import (
 	"bytes"

format/gzip/gzip.go

@@ -3,7 +3,6 @@ package gz
 // https://tools.ietf.org/html/rfc1952
 // TODO: test name, comment etc
 // TODO: verify isize?
-// TODO: mime application/gzip
 
 import (
 	"bytes"

format/id3/id3v1.go

@@ -8,7 +8,6 @@ import (
 	"github.com/wader/fq/pkg/decode"
 )
 
-// TODO: trim strings?
 // TODO: comment 28 long, zero byte, track number
 
 func init() {

format/jpeg/jpeg.go

@@ -3,7 +3,6 @@ package jpeg
 // https://www.w3.org/Graphics/JPEG/itu-t81.pdf
 // TODO: warning on junk before marker?
 // TODO: extract photohop to own decoder?
-// TODO: image/jpeg
 
 import (
 	"bytes"

format/mp4/boxes.go

@@ -1,5 +1,7 @@
 package mp4
 
+// TODO: flags?
+
 import (
 	"bytes"
 	"fmt"
@@ -205,7 +207,6 @@ func init() {
 		"tref": decodeBoxes,
 		"tkhd": func(ctx *decodeContext, d *decode.D) {
 			d.FieldU8("version")
-			// TODO: values
 			d.FieldU24("flags")
 			_ = decodeFieldTime(d, "creation_time")
 			_ = decodeFieldTime(d, "modification_time")
@@ -214,7 +215,6 @@ func init() {
 			d.FieldU32("duration")
 			d.FieldBitBufLen("reserved2", 8*8)
 			d.FieldU16("layer")
-			// TODO: values
 			d.FieldU16("alternate_group")
 			d.FieldFP16("volume")
 			d.FieldU16("reserved3")
@@ -232,7 +232,6 @@ func init() {
 		"mdia": decodeBoxes,
 		"mdhd": func(_ *decodeContext, d *decode.D) {
 			d.FieldU8("version")
-			// TODO: values
 			d.FieldU24("flags")
 			// TODO: timestamps
 			_ = decodeFieldTime(d, "creation_time")
@@ -254,7 +253,6 @@ func init() {
 		},
 		"hdlr": func(ctx *decodeContext, d *decode.D) {
 			d.FieldU8("version")
-			// TODO: values
 			d.FieldU24("flags")
 			d.FieldUTF8("component_type", 4)
 			subTypeNames := map[string]string{
@@ -306,7 +304,6 @@ func init() {
 		"dinf": decodeBoxes,
 		"dref": func(_ *decodeContext, d *decode.D) {
 			d.FieldU8("version")
-			// TODO: values
 			d.FieldU24("flags")
 			entryCount := d.FieldU32("entry_count")
 			var i uint64
@@ -323,7 +320,6 @@ func init() {
 		"stbl": decodeBoxes,
 		"stsd": func(ctx *decodeContext, d *decode.D) {
 			d.FieldU8("version")
-			// TODO: values
 			d.FieldU24("flags")
 			entryCount := d.FieldU32("entry_count")
 			var i uint64
@@ -350,24 +346,7 @@ func init() {
 
 							version := d.FieldU16("version")
 							d.FieldU16("revision_level")
-							d.FieldU32("max_packet_size") // TODO: vendor?
-
-							// "Some sample descriptions terminate with four zero bytes that are not otherwise indicated."
-							// uses decodeBoxes
-
-							// Timecode sample
-							// TODO: tc64
-							// d.DecodeRangeFn(firstBit, nBits, func(d *decode.D) {
-							// 	d.FieldStructFn("sample", func(d *decode.D) {
-							// 		d.FieldU32("reserved0")
-							// 		d.FieldBitBufLen("data", d.BitsLeft())
-							// 		// d.FieldU32("flags")
-							// 		// d.FieldS32("timescale")
-							// 		// d.FieldS32("frame_duration")
-							// 		// d.FieldS32("num_frames")
-							// 		// d.FieldU8("reserved1")
-							// 	})
-							// })
+							d.FieldU32("max_packet_size") // TODO: vendor for some subtype?
 
 							switch subType {
 							case "soun":
@@ -476,7 +455,6 @@ func init() {
 		},
 		"dfLa": func(ctx *decodeContext, d *decode.D) {
 			d.FieldU8("version")
-			// TODO: values
 			d.FieldU24("flags")
 			d.FieldArrayFn("metadatablocks", func(d *decode.D) {
 				for {
@@ -511,15 +489,6 @@ func init() {
 		"esds": func(ctx *decodeContext, d *decode.D) {
 			d.FieldU32("version")
 
-			// TODO: some other way to know how to decode?
-			// TODO: why not always? was there a reason?
-			// dataFormat := ""
-			// if ctx.currentTrack != nil && len(ctx.currentTrack.sampleDescriptions) > 0 {
-			// 	dataFormat = ctx.currentTrack.sampleDescriptions[0].dataFormat
-			// }
-
-			// switch dataFormat {
-			// case "mp4a", "mp4v":
 			_, v := d.FieldFormat("es_descriptor", mpegESFormat)
 			mpegEsOut, ok := v.(format.MpegEsOut)
 			if !ok {
@@ -532,15 +501,9 @@ func init() {
 				ctx.currentTrack.decodeOpts = append(ctx.currentTrack.decodeOpts,
 					decode.FormatOptions{InArg: format.AACFrameIn{ObjectType: dc.ASCObjectType}})
 			}
-
-			// default:
-			// 	d.FieldBitBufLen("data", d.BitsLeft())
-			// }
-
 		},
 		"stts": func(_ *decodeContext, d *decode.D) {
 			d.FieldU8("version")
-			// TODO: values
 			d.FieldU24("flags")
 			numEntries := d.FieldU32("entry_count")
 			var i uint64
@@ -552,7 +515,6 @@ func init() {
 		},
 		"stsc": func(ctx *decodeContext, d *decode.D) {
 			d.FieldU8("version")
-			// TODO: values
 			d.FieldU24("flags")
 			entryCount := d.FieldU32("entry_count")
 			var i uint64
@@ -572,7 +534,6 @@ func init() {
 		},
 		"stsz": func(ctx *decodeContext, d *decode.D) {
 			d.FieldU8("version")
-			// TODO: values
 			d.FieldU24("flags")
 			// TODO: bytes_per_sample from audio stsd?
 			sampleSize := d.FieldU32("sample_size")
@@ -596,7 +557,6 @@ func init() {
 		},
 		"stco": func(ctx *decodeContext, d *decode.D) {
 			d.FieldU8("version")
-			// TODO: values
 			d.FieldU24("flags")
 			entryCount := d.FieldU32("entry_count")
 			var i uint64
@@ -653,7 +613,6 @@ func init() {
 		// TODO: refactor: merge with stco?
 		"co64": func(ctx *decodeContext, d *decode.D) {
 			d.FieldU8("version")
-			// TODO: values
 			d.FieldU24("flags")
 			entryCount := d.FieldU32("entry_count")
 			var i uint64
@@ -971,7 +930,7 @@ func init() {
 			d.FieldU8("version")
 			d.FieldU24("flags")
 			d.FieldU1("pad")
-			// ISO-639-2/T as 3*5 bit intgers - 0x60
+			// ISO-639-2/T as 3*5 bit integers - 0x60
 			d.FieldStrFn("language", func() (string, string) {
 				s := ""
 				for i := 0; i < 3; i++ {
@@ -1170,25 +1129,7 @@ func init() {
 			d.FieldU24("flags")
 
 			d.FieldU32("sample_count")
-			// d.FieldArrayFn("samples", func(d *decode.D) {
-			// 	for i := uint64(0); i < sampleCount; i++ {
-			// 		d.FieldStructFn("sample", func(d *decode.D) {
-			// 			// TODO: IV_size?
-			// 			d.FieldBitBufLen("iv", 8*8)
-			// 			if flags&0b10 != 0 {
-			// 				subSampleCount := d.FieldU32("sub_sample_count")
-			// 				d.FieldArrayFn("subsamples", func(d *decode.D) {
-			// 					for i := uint64(0); i < subSampleCount; i++ {
-			// 						d.FieldStructFn("subsample", func(d *decode.D) {
-			// 							d.FieldU16("bytes_of_clear_data")
-			// 							d.FieldU32("bytes_fo_encrypted_data")
-			// 						})
-			// 					}
-			// 				})
-			// 			}
-			// 		})
-			// 	}
-			// })
+			// TODO need iv size here
 		},
 		"tenc": func(_ *decodeContext, d *decode.D) {
 			version := d.FieldU8("version")

format/mp4/brands.go

@@ -1,6 +1,6 @@
 package mp4
 
-// from
+// from:
 // https://cconcolato.github.io/mp4ra/filetype.html
 // https://exiftool.org/TagNames/QuickTime.html
 var brandDescriptions = map[string]string{

format/mp4/mp4.go

@@ -1,23 +1,19 @@
 package mp4
 
-// Tries to decode both ISOBMFF and quicktime
+// Tries to decode ISOBMFF quicktime mov
 // Uses naming from ISOBMFF when possible
 // ISO/IEC 14496-12
 // Quicktime file format https://developer.apple.com/standards/qtff-2001.pdf
 // FLAC in ISOBMFF https://github.com/xiph/flac/blob/master/doc/isoflac.txt
-// https://www.webmproject.org/vp9/mp4/
+// vp9 in ISOBMFF https://www.webmproject.org/vp9/mp4/
+// https://developer.apple.com/library/archive/documentation/QuickTime/QTFF/Metadata/Metadata.html#//apple_ref/doc/uid/TP40000939-CH1-SW43
 
 // TODO: validate structure better? trak/stco etc
-// TODO: fmp4, default samples sizes etc
 // TODO: keep track of structure somehow to detect errors
-// TODO: ISO-14496 says mp4 mdat can begin and end with original header/trailer (no used i guess?)
-// TODO: more metadata
-// https://developer.apple.com/library/archive/documentation/QuickTime/QTFF/Metadata/Metadata.html#//apple_ref/doc/uid/TP40000939-CH1-SW43
+// TODO: ISO-14496 says mp4 mdat can begin and end with original header/trailer (no used?)
 // TODO: split into mov and mp4 decoder?
 // TODO: split into mp4_box decoder? needs complex in/out args?
-// TODO: fragmented: tracks per fragment? fragment_index in samples?
 // TODO: better probe, find first 2 boxes, should be free,ftyp or mdat?
-// TODO: mime
 
 import (
 	"embed"

format/mpeg/adts_frame.go

@@ -1,9 +1,5 @@
 package mpeg
 
-// TODO: move aac things to mpeg?
-
-// TODO:
-// create ASC decoder
 // https://github.com/mstorsjo/fdk-aac/blob/f285813ec15e7c6f8e4839c9eb4f6b0cd2da1990/libMpegTPEnc/src/tpenc_asc.cpp
 // https://www.iis.fraunhofer.de/content/dam/iis/de/doc/ame/wp/FraunhoferIIS_Application-Bulletin_AAC-Transport-Formats.pdf
 // https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/aac_adtstoasc_bsf.c

format/mpeg/avc_dcr.go

@@ -3,9 +3,7 @@ package mpeg
 // ISO/IEC 14496-15 AVC file format, 5.3.3.1.2 Syntax
 // ISO_IEC_14496-10 AVC
 
-// TODO: PPS
 // TODO: use avcLevels
-// TODO: nal unescape function?
 
 import (
 	"github.com/wader/fq/format"

format/mpeg/avc_nalu.go

@@ -1,7 +1,6 @@
 package mpeg
 
 // TODO: unescape configurable? merge with AVC_NAL? merge with HEVC?
-// TODO: naming
 
 import (
 	"github.com/wader/fq/format"

format/mpeg/avc_sps.go

@@ -1,8 +1,5 @@
 package mpeg
 
-// ISO/IEC 14496-15 AVC file format, 5.3.3.1.2 Syntax
-// ISO_IEC_14496-10 AVC
-
 import (
 	"github.com/wader/fq/format"
 	"github.com/wader/fq/format/registry"

format/mpeg/mp3_frame.go

@@ -91,13 +91,6 @@ func init() {
 // 	15: {4, 3},
 // }
 
-// func huffmanDecode(d *decode.D, table []int) {
-// 	i := 0
-// 	for table[i] < 0 {
-
-// 	}
-// }
-
 var blockTypeNames = map[uint64]string{
 	0: "reserved",
 	1: "start block",

format/mpeg/mpeg_pes.go

@@ -1,7 +1,6 @@
 package mpeg
 
 // TODO: probeable?
-// TODO: add ts
 
 // http://dvdnav.mplayerhq.hu/dvdinfo/mpeghdrs.html
 

format/ogg/ogg.go

@@ -1,7 +1,6 @@
 package ogg
 
 // https://xiph.org/ogg/doc/framing.html
-// TODO: audio/ogg"
 
 import (
 	"bytes"
@@ -101,7 +100,6 @@ func decodeOgg(d *decode.D, in interface{}) interface{} {
 					s.firstBit = d.Pos()
 				}
 
-				// TODO: decoder buffer api that panics?
 				psBytes := ps.Len() / 8
 
 				// TODO: cleanup

format/ogg/ogg_page.go

@@ -1,7 +1,5 @@
 package ogg
 
-// https://xiph.org/ogg/doc/framing.html
-
 import (
 	"bytes"
 

format/png/png.go

@@ -4,7 +4,6 @@ package png
 // https://ftp-osl.osuosl.org/pub/libpng/documents/pngext-1.5.0.html
 // https://wiki.mozilla.org/APNG_Specification
 // TODO: color types
-// TODO: image/png
 
 import (
 	"hash/crc32"

format/tar/tar.go

@@ -2,7 +2,6 @@ package tar
 
 // https://www.gnu.org/software/tar/manual/html_node/Standard.html
 // TODO: extensions?
-// TODO: application/x-tar
 
 import (
 	"bytes"

format/tiff/tiff.go

@@ -1,7 +1,6 @@
 package tiff
 
 // https://www.adobe.io/content/dam/udp/en/open/standards/tiff/TIFF6.pdf
-// TODO: image/tiff
 
 import (
 	"github.com/wader/fq/format"