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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,117 @@ | ||
| package riff | ||
|
|
||
| // http://midi.teragonaudio.com/tech/aiff.htm | ||
|
|
||
| import ( | ||
| "github.com/wader/fq/format" | ||
| "github.com/wader/fq/internal/mathex" | ||
| "github.com/wader/fq/pkg/decode" | ||
| "github.com/wader/fq/pkg/interp" | ||
| "github.com/wader/fq/pkg/scalar" | ||
| ) | ||
|
|
||
| func init() { | ||
| interp.RegisterFormat(decode.Format{ | ||
| Name: format.AIFF, | ||
| ProbeOrder: format.ProbeOrderBinFuzzy, | ||
| Description: "Audio Interchange File Format", | ||
| Groups: []string{format.PROBE}, | ||
| DecodeFn: aiffDecode, | ||
| }) | ||
| } | ||
|
|
||
| const aiffRiffType = "AIFF" | ||
|
|
||
| // pstring: | ||
| // > Pascal-style string, a one-byte count followed by that many text bytes. The total number of bytes in this data type should be even. | ||
| // > A pad byte can be added to the end of the text to accomplish this. This pad byte is not reflected in the count. | ||
| func aiffPString(d *decode.D) string { | ||
| l := d.U8() | ||
| pad := (l + 1) % 2 | ||
| s := d.UTF8(int(l + pad)) | ||
| return s[0 : l+1-pad] | ||
| } | ||
|
|
||
| func aiffDecode(d *decode.D) any { | ||
| var riffType string | ||
| riffDecode( | ||
| d, | ||
| nil, | ||
| func(d *decode.D, path path) (string, int64) { | ||
| id := d.FieldUTF8("id", 4, chunkIDDescriptions) | ||
|
|
||
| const restOfFileLen = 0xffffffff | ||
| size := int64(d.FieldScalarUintFn("size", func(d *decode.D) scalar.Uint { | ||
| l := d.U32() | ||
| if l == restOfFileLen { | ||
| return scalar.Uint{Actual: l, DisplayFormat: scalar.NumberHex, Description: "Rest of file"} | ||
| } | ||
| return scalar.Uint{Actual: l, DisplayFormat: scalar.NumberDecimal} | ||
| }).Actual) | ||
|
|
||
| if size == restOfFileLen { | ||
| size = d.BitsLeft() / 8 | ||
| } | ||
| return id, size | ||
| }, | ||
| func(d *decode.D, id string, path path) (bool, any) { | ||
| switch id { | ||
| case "FORM": | ||
| riffType = d.FieldUTF8("format", 4, d.StrAssert(aiffRiffType)) | ||
| return true, nil | ||
| case "COMT": | ||
| numComments := d.FieldU16("num_comments") | ||
| d.FieldArray("comments", func(d *decode.D) { | ||
| for i := 0; i < int(numComments); i++ { | ||
| d.FieldStruct("comment", func(d *decode.D) { | ||
| d.FieldU32("timestamp") | ||
| d.FieldU16("marker_id") | ||
| count := d.FieldU16("count") | ||
| pad := count % 2 | ||
| d.FieldUTF8("text", int(count)) | ||
| if pad != 0 { | ||
| d.FieldRawLen("pad", int64(pad)*8) | ||
| } | ||
| }) | ||
| } | ||
| }) | ||
| return false, nil | ||
| case "COMM": | ||
| d.FieldU16("num_channels") | ||
| d.FieldU32("num_sample_frames") | ||
| d.FieldU16("sample_size") | ||
| // TODO: support big float? | ||
| d.FieldFltFn("sample_rate", func(d *decode.D) float64 { | ||
| return mathex.NewFloat80FromBytes(d.BytesLen(10)).Float64() | ||
| }) | ||
| return false, nil | ||
| case "SSND": | ||
| d.FieldU32("offset") | ||
| d.FieldU32("block_size") | ||
| d.FieldRawLen("data", d.BitsLeft()) | ||
| return false, nil | ||
| case "MARK": | ||
| numMarkers := d.FieldU16("num_markers") | ||
| d.FieldArray("markers", func(d *decode.D) { | ||
| for i := 0; i < int(numMarkers); i++ { | ||
| d.FieldStruct("marker", func(d *decode.D) { | ||
| d.FieldU16("id") | ||
| d.FieldU32("position") | ||
| d.FieldStrFn("name", aiffPString) | ||
| }) | ||
| } | ||
| }) | ||
| return false, nil | ||
| default: | ||
| d.FieldRawLen("data", d.BitsLeft()) | ||
| return false, nil | ||
| } | ||
| }, | ||
| ) | ||
|
|
||
| if riffType != aiffRiffType { | ||
| d.Errorf("wrong or no AIFF riff type found (%s)", riffType) | ||
| } | ||
|
|
||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| # ffmpeg -f lavfi -i sine -t 100ms -f wav sox.wav; sox sox.wav six.aiff | ||
| $ fq dv sox.aiff | ||
| |00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f|0123456789abcdef|.{}: sox.aiff (aiff) 0x0-0x22cb.7 (8908) | ||
| 0x0000|46 4f 52 4d |FORM | id: "FORM" 0x0-0x3.7 (4) | ||
| 0x0000| 00 00 22 c4 | ..". | size: 8900 0x4-0x7.7 (4) | ||
| 0x0000| 41 49 46 46 | AIFF | format: "AIFF" (valid) 0x8-0xb.7 (4) | ||
| | | | chunks[0:3]: 0xc-0x22cb.7 (8896) | ||
| | | | [0]{}: chunk 0xc-0x2d.7 (34) | ||
| 0x0000| 43 4f 4d 54| COMT| id: "COMT" 0xc-0xf.7 (4) | ||
| 0x0010|00 00 00 1a |.... | size: 26 0x10-0x13.7 (4) | ||
| 0x0010| 00 01 | .. | num_comments: 1 0x14-0x15.7 (2) | ||
| | | | comments[0:1]: 0x16-0x2d.7 (24) | ||
| | | | [0]{}: comment 0x16-0x2d.7 (24) | ||
| 0x0010| e0 2f 99 4b | ./.K | timestamp: 3761215819 0x16-0x19.7 (4) | ||
| 0x0010| 00 00 | .. | marker_id: 0 0x1a-0x1b.7 (2) | ||
| 0x0010| 00 10 | .. | count: 16 0x1c-0x1d.7 (2) | ||
| 0x0010| 50 72| Pr| text: "Processed by SoX" 0x1e-0x2d.7 (16) | ||
| 0x0020|6f 63 65 73 73 65 64 20 62 79 20 53 6f 58 |ocessed by SoX | | ||
| | | | [1]{}: chunk 0x2e-0x47.7 (26) | ||
| 0x0020| 43 4f| CO| id: "COMM" 0x2e-0x31.7 (4) | ||
| 0x0030|4d 4d |MM | | ||
| 0x0030| 00 00 00 12 | .... | size: 18 0x32-0x35.7 (4) | ||
| 0x0030| 00 01 | .. | num_channels: 1 0x36-0x37.7 (2) | ||
| 0x0030| 00 00 11 3a | ...: | num_sample_frames: 4410 0x38-0x3b.7 (4) | ||
| 0x0030| 00 10 | .. | sample_size: 16 0x3c-0x3d.7 (2) | ||
| 0x0030| 40 0e| @.| sample_rate: 44100 0x3e-0x47.7 (10) | ||
| 0x0040|ac 44 00 00 00 00 00 00 |.D...... | | ||
| | | | [2]{}: chunk 0x48-0x22cb.7 (8836) | ||
| 0x0040| 53 53 4e 44 | SSND | id: "SSND" 0x48-0x4b.7 (4) | ||
| 0x0040| 00 00 22 7c| .."|| size: 8828 0x4c-0x4f.7 (4) | ||
| 0x0050|00 00 00 00 |.... | offset: 0 0x50-0x53.7 (4) | ||
| 0x0050| 00 00 00 00 | .... | block_size: 0 0x54-0x57.7 (4) | ||
| 0x0050| 00 00 01 00 01 ff 02 fd| ........| data: raw bits 0x58-0x22cb.7 (8820) | ||
| 0x0060|03 f8 04 ee 05 e0 06 cc 07 b0 08 8d 09 62 0a 2d|.............b.-| | ||
| * |until 0x22cb.7 (end) (8820) | | |
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