Update module url

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DataHoarder 2022-07-17 00:07:10 +02:00
parent 42d25f4866
commit 42f940f815
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23 changed files with 196 additions and 182 deletions

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@ -2,7 +2,7 @@
[![Build Status](https://travis-ci.org/mewkiz/flac.svg?branch=master)](https://travis-ci.org/mewkiz/flac)
[![Coverage Status](https://img.shields.io/coveralls/mewkiz/flac.svg)](https://coveralls.io/r/mewkiz/flac?branch=master)
[![GoDoc](https://godoc.org/github.com/mewkiz/flac?status.svg)](https://godoc.org/github.com/mewkiz/flac)
[![GoDoc](https://godoc.org/git.gammaspectra.live/S.O.N.G/flacgo?status.svg)](https://godoc.org/git.gammaspectra.live/S.O.N.G/flacgo)
This package provides access to [FLAC][1] (Free Lossless Audio Codec) streams.
@ -16,40 +16,40 @@ Documentation provided by GoDoc.
- [frame][flac/frame]: implements access to FLAC audio frames.
- [meta][flac/meta]: implements access to FLAC metadata blocks.
[flac]: http://godoc.org/github.com/mewkiz/flac
[flac/frame]: http://godoc.org/github.com/mewkiz/flac/frame
[flac/meta]: http://godoc.org/github.com/mewkiz/flac/meta
[flac]: http://godoc.org/git.gammaspectra.live/S.O.N.G/flacgo
[flac/frame]: http://godoc.org/git.gammaspectra.live/S.O.N.G/flacgo/frame
[flac/meta]: http://godoc.org/git.gammaspectra.live/S.O.N.G/flacgo/meta
## Changes
* Version 1.0.7 (2021-01-28)
- Add seek API (see [#44](https://github.com/mewkiz/flac/pull/44) and [#46](https://github.com/mewkiz/flac/pull/46)). Thanks to [Craig Swank](https://github.com/cswank).
- Add seek API (see [#44](https://git.gammaspectra.live/S.O.N.G/flacgo/pull/44) and [#46](https://git.gammaspectra.live/S.O.N.G/flacgo/pull/46)). Thanks to [Craig Swank](https://github.com/cswank).
* Version 1.0.6 (2019-12-20)
- Add experimental Encoder API to encode audio samples and metadata blocks (see [#32](https://github.com/mewkiz/flac/pull/32)).
- Add experimental Encoder API to encode audio samples and metadata blocks (see [#32](https://git.gammaspectra.live/S.O.N.G/flacgo/pull/32)).
- Use go.mod.
- Skip ID3v2 data prepended to flac files when parsing (see [36cc17e](https://github.com/mewkiz/flac/commit/36cc17efed51a9bae283d6a3a7a10997492945e7)).
- Skip ID3v2 data prepended to flac files when parsing (see [36cc17e](https://git.gammaspectra.live/S.O.N.G/flacgo/commit/36cc17efed51a9bae283d6a3a7a10997492945e7)).
- Remove dependency on encodebytes. Thanks to [Mikey Dickerson](https://github.com/mdickers47).
- Add 16kHz test case. Thanks to [Chewxy](https://github.com/chewxy).
- Fix lint issues (see [#25](https://github.com/mewkiz/flac/issues/25)).
- Fix lint issues (see [#25](https://git.gammaspectra.live/S.O.N.G/flacgo/issues/25)).
* Version 1.0.5 (2016-05-06)
- Simplify import paths. Drop use of gopkg.in, and rely on vendoring instead (see [azul3d/engine#1](https://github.com/azul3d/engine/issues/1)).
- Add FLAC decoding benchmark (see [d675e0a](https://github.com/mewkiz/flac/blob/d675e0aaccf2e43055f56b9b3feeddfdeed402e2/frame/frame_test.go#L60))
- Add FLAC decoding benchmark (see [d675e0a](https://git.gammaspectra.live/S.O.N.G/flacgo/blob/d675e0aaccf2e43055f56b9b3feeddfdeed402e2/frame/frame_test.go#L60))
* Version 1.0.4 (2016-02-11)
- Add API examples to documentation (see [#11](https://github.com/mewkiz/flac/issues/11)).
- Extend test cases (see [aadf80a](https://github.com/mewkiz/flac/commit/aadf80aa28c463a94b8d5c49757e5a0948613ce2)).
- Add API examples to documentation (see [#11](https://git.gammaspectra.live/S.O.N.G/flacgo/issues/11)).
- Extend test cases (see [aadf80a](https://git.gammaspectra.live/S.O.N.G/flacgo/commit/aadf80aa28c463a94b8d5c49757e5a0948613ce2)).
* Version 1.0.3 (2016-02-02)
- Implement decoding of FLAC files with wasted bits-per-sample (see [#12](https://github.com/mewkiz/flac/issues/12)).
- Stress test the library using [go-fuzz](https://github.com/dvyukov/go-fuzz) (see [#10](https://github.com/mewkiz/flac/pull/10)). Thanks to [Patrick Mézard](https://github.com/pmezard).
- Implement decoding of FLAC files with wasted bits-per-sample (see [#12](https://git.gammaspectra.live/S.O.N.G/flacgo/issues/12)).
- Stress test the library using [go-fuzz](https://github.com/dvyukov/go-fuzz) (see [#10](https://git.gammaspectra.live/S.O.N.G/flacgo/pull/10)). Thanks to [Patrick Mézard](https://github.com/pmezard).
* Version 1.0.2 (2015-06-05)
- Fix decoding of blocking strategy (see [#9](https://github.com/mewkiz/flac/pull/9)). Thanks to [Sergey Didyk](https://github.com/sdidyk).
- Fix decoding of blocking strategy (see [#9](https://git.gammaspectra.live/S.O.N.G/flacgo/pull/9)). Thanks to [Sergey Didyk](https://github.com/sdidyk).
* Version 1.0.1 (2015-02-25)
- Fix two subframe decoding bugs (see [#7](https://github.com/mewkiz/flac/pull/7)). Thanks to [Jonathan MacMillan](https://github.com/perotinus).
- Fix two subframe decoding bugs (see [#7](https://git.gammaspectra.live/S.O.N.G/flacgo/pull/7)). Thanks to [Jonathan MacMillan](https://github.com/perotinus).
- Add frame decoding test cases.
* Version 1.0.0 (2014-09-30)

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@ -8,9 +8,9 @@ import (
"log"
"os"
"git.gammaspectra.live/S.O.N.G/flacgo"
"github.com/go-audio/audio"
"github.com/go-audio/wav"
"github.com/mewkiz/flac"
"github.com/mewkiz/pkg/osutil"
"github.com/mewkiz/pkg/pathutil"
"github.com/pkg/errors"
@ -88,7 +88,7 @@ func flac2wav(path string, force bool) error {
// as signed values (ref page 59-60 of [1]).
//
// [1]: http://www-mmsp.ece.mcgill.ca/Documents/AudioFormats/WAVE/Docs/riffmci.pdf
// ref: https://github.com/mewkiz/flac/issues/51#issuecomment-1046183409
// ref: https://git.gammaspectra.live/S.O.N.G/flacgo/issues/51#issuecomment-1046183409
const midpointValue = 0x80
sample += midpointValue
}

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@ -25,8 +25,8 @@ import (
"strconv"
"strings"
"github.com/mewkiz/flac"
"github.com/mewkiz/flac/meta"
"git.gammaspectra.live/S.O.N.G/flacgo"
"git.gammaspectra.live/S.O.N.G/flacgo/meta"
)
// flagBlockNum contains an optional comma-separated list of block numbers to
@ -143,10 +143,11 @@ var typeName = map[meta.Type]string{
// is_last.
//
// Example:
// METADATA block #0
// type: 0 (STREAMINFO)
// is last: false
// length: 34
//
// METADATA block #0
// type: 0 (STREAMINFO)
// is last: false
// length: 34
func listStreamInfoHeader(isLast bool) {
fmt.Println("METADATA block #0")
fmt.Println(" type: 0 (STREAMINFO)")
@ -155,10 +156,11 @@ func listStreamInfoHeader(isLast bool) {
}
// Example:
// METADATA block #0
// type: 0 (STREAMINFO)
// is last: false
// length: 34
//
// METADATA block #0
// type: 0 (STREAMINFO)
// is last: false
// length: 34
func listHeader(header *meta.Header, blockNum int) {
name, ok := typeName[header.Type]
if !ok {
@ -171,15 +173,16 @@ func listHeader(header *meta.Header, blockNum int) {
}
// Example:
// minimum blocksize: 4608 samples
// maximum blocksize: 4608 samples
// minimum framesize: 0 bytes
// maximum framesize: 19024 bytes
// sample_rate: 44100 Hz
// channels: 2
// bits-per-sample: 16
// total samples: 151007220
// MD5 signature: 2e6238f5d9fe5c19f3ead628f750fd3d
//
// minimum blocksize: 4608 samples
// maximum blocksize: 4608 samples
// minimum framesize: 0 bytes
// maximum framesize: 19024 bytes
// sample_rate: 44100 Hz
// channels: 2
// bits-per-sample: 16
// total samples: 151007220
// MD5 signature: 2e6238f5d9fe5c19f3ead628f750fd3d
func listStreamInfo(si *meta.StreamInfo) {
fmt.Printf(" minimum blocksize: %d samples\n", si.BlockSizeMin)
fmt.Printf(" maximum blocksize: %d samples\n", si.BlockSizeMax)
@ -193,9 +196,10 @@ func listStreamInfo(si *meta.StreamInfo) {
}
// Example:
// application ID: 46696361
// data contents:
// Medieval CUE Splitter (www.medieval.it)
//
// application ID: 46696361
// data contents:
// Medieval CUE Splitter (www.medieval.it)
func listApplication(app *meta.Application) {
fmt.Printf(" application ID: %d\n", app.ID)
fmt.Println(" data contents:")
@ -205,10 +209,11 @@ func listApplication(app *meta.Application) {
}
// Example:
// seek points: 17
// point 0: sample_number=0, stream_offset=0, frame_samples=4608
// point 1: sample_number=2419200, stream_offset=3733871, frame_samples=4608
// ...
//
// seek points: 17
// point 0: sample_number=0, stream_offset=0, frame_samples=4608
// point 1: sample_number=2419200, stream_offset=3733871, frame_samples=4608
// ...
func listSeekTable(st *meta.SeekTable) {
fmt.Printf(" seek points: %d\n", len(st.Points))
for pointNum, point := range st.Points {
@ -221,11 +226,12 @@ func listSeekTable(st *meta.SeekTable) {
}
// Example:
// vendor string: reference libFLAC 1.2.1 20070917
// comments: 10
// comment[0]: ALBUM=「sugar sweet nightmare」 & 「化物語」劇伴音楽集 其の壹
// comment[1]: ARTIST=神前暁
// ...
//
// vendor string: reference libFLAC 1.2.1 20070917
// comments: 10
// comment[0]: ALBUM=「sugar sweet nightmare」 & 「化物語」劇伴音楽集 其の壹
// comment[1]: ARTIST=神前暁
// ...
func listVorbisComment(vc *meta.VorbisComment) {
fmt.Printf(" vendor string: %s\n", vc.Vendor)
fmt.Printf(" comments: %d\n", len(vc.Tags))
@ -235,34 +241,35 @@ func listVorbisComment(vc *meta.VorbisComment) {
}
// Example:
// media catalog number:
// lead-in: 88200
// is CD: true
// number of tracks: 18
// track[0]
// offset: 0
// number: 1
// ISRC:
// type: AUDIO
// pre-emphasis: false
// number of index points: 1
// index[0]
// offset: 0
// number: 1
// track[1]
// offset: 2421384
// number: 2
// ISRC:
// type: AUDIO
// pre-emphasis: false
// number of index points: 1
// index[0]
// offset: 0
// number: 1
// ...
// track[17]
// offset: 151007220
// number: 170 (LEAD-OUT)
//
// media catalog number:
// lead-in: 88200
// is CD: true
// number of tracks: 18
// track[0]
// offset: 0
// number: 1
// ISRC:
// type: AUDIO
// pre-emphasis: false
// number of index points: 1
// index[0]
// offset: 0
// number: 1
// track[1]
// offset: 2421384
// number: 2
// ISRC:
// type: AUDIO
// pre-emphasis: false
// number of index points: 1
// index[0]
// offset: 0
// number: 1
// ...
// track[17]
// offset: 151007220
// number: 170 (LEAD-OUT)
func listCueSheet(cs *meta.CueSheet) {
fmt.Printf(" media catalog number: %s\n", cs.MCN)
fmt.Printf(" lead-in: %d\n", cs.NLeadInSamples)
@ -294,17 +301,18 @@ func listCueSheet(cs *meta.CueSheet) {
}
// Example:
// type: 3 (Cover (front))
// MIME type: image/jpeg
// description:
// width: 0
// height: 0
// depth: 0
// colors: 0 (unindexed)
// data length: 234569
// data:
// 00000000: FF D8 FF E0 00 10 4A 46 49 46 00 01 01 01 00 60 ......JFIF.....`
// 00000010: 00 60 00 00 FF DB 00 43 00 01 01 01 01 01 01 01 .`.....C........
//
// type: 3 (Cover (front))
// MIME type: image/jpeg
// description:
// width: 0
// height: 0
// depth: 0
// colors: 0 (unindexed)
// data length: 234569
// data:
// 00000000: FF D8 FF E0 00 10 4A 46 49 46 00 01 01 01 00 60 ......JFIF.....`
// 00000010: 00 60 00 00 FF DB 00 43 00 01 01 01 01 01 01 01 .`.....C........
func listPicture(pic *meta.Picture) {
typeName := map[uint32]string{
0: "Other",

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@ -6,11 +6,11 @@ import (
"log"
"os"
"git.gammaspectra.live/S.O.N.G/flacgo"
"git.gammaspectra.live/S.O.N.G/flacgo/frame"
"git.gammaspectra.live/S.O.N.G/flacgo/meta"
"github.com/go-audio/audio"
"github.com/go-audio/wav"
"github.com/mewkiz/flac"
"github.com/mewkiz/flac/frame"
"github.com/mewkiz/flac/meta"
"github.com/mewkiz/pkg/osutil"
"github.com/mewkiz/pkg/pathutil"
"github.com/pkg/errors"

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@ -1,4 +1,5 @@
//+build ignore
//go:build ignore
// +build ignore
package flac_test
@ -7,8 +8,8 @@ import (
"io/ioutil"
"testing"
"github.com/mewkiz/flac"
"github.com/mewkiz/flac/meta"
"git.gammaspectra.live/S.O.N.G/flacgo"
"git.gammaspectra.live/S.O.N.G/flacgo/meta"
)
func TestEncode(t *testing.T) {

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@ -5,8 +5,8 @@ import (
"hash"
"io"
"git.gammaspectra.live/S.O.N.G/flacgo/meta"
"github.com/icza/bitio"
"github.com/mewkiz/flac/meta"
"github.com/mewkiz/pkg/errutil"
)

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@ -4,11 +4,11 @@ import (
"encoding/binary"
"io"
"git.gammaspectra.live/S.O.N.G/flacgo/frame"
"git.gammaspectra.live/S.O.N.G/flacgo/internal/hashutil/crc16"
"git.gammaspectra.live/S.O.N.G/flacgo/internal/hashutil/crc8"
"git.gammaspectra.live/S.O.N.G/flacgo/internal/utf8"
"github.com/icza/bitio"
"github.com/mewkiz/flac/frame"
"github.com/mewkiz/flac/internal/hashutil/crc16"
"github.com/mewkiz/flac/internal/hashutil/crc8"
"github.com/mewkiz/flac/internal/utf8"
"github.com/mewkiz/pkg/errutil"
)

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@ -5,9 +5,9 @@ import (
"fmt"
"io"
"git.gammaspectra.live/S.O.N.G/flacgo/internal/ioutilx"
"git.gammaspectra.live/S.O.N.G/flacgo/meta"
"github.com/icza/bitio"
"github.com/mewkiz/flac/internal/ioutilx"
"github.com/mewkiz/flac/meta"
"github.com/mewkiz/pkg/errutil"
)

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@ -1,9 +1,9 @@
package flac
import (
"git.gammaspectra.live/S.O.N.G/flacgo/frame"
iobits "git.gammaspectra.live/S.O.N.G/flacgo/internal/bits"
"github.com/icza/bitio"
"github.com/mewkiz/flac/frame"
iobits "github.com/mewkiz/flac/internal/bits"
"github.com/mewkiz/pkg/errutil"
)

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@ -7,7 +7,7 @@ import (
"io"
"log"
"github.com/mewkiz/flac"
"git.gammaspectra.live/S.O.N.G/flacgo"
)
func ExampleParseFile() {

10
flac.go
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@ -18,9 +18,9 @@
// Please refer to the documentation of the meta [2] and the frame [3] packages
// for a brief introduction of their respective formats.
//
// [1]: https://www.xiph.org/flac/format.html#stream
// [2]: https://godoc.org/github.com/mewkiz/flac/meta
// [3]: https://godoc.org/github.com/mewkiz/flac/frame
// [1]: https://www.xiph.org/flac/format.html#stream
// [2]: https://godoc.org/git.gammaspectra.live/S.O.N.G/flacgo/meta
// [3]: https://godoc.org/git.gammaspectra.live/S.O.N.G/flacgo/frame
//
// Note: the Encoder API is experimental until the 1.1.x release. As such, it's
// API is expected to change.
@ -34,8 +34,8 @@ import (
"io"
"os"
"github.com/mewkiz/flac/frame"
"github.com/mewkiz/flac/meta"
"git.gammaspectra.live/S.O.N.G/flacgo/frame"
"git.gammaspectra.live/S.O.N.G/flacgo/meta"
)
// A Stream contains the metadata blocks and provides access to the audio frames

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@ -6,7 +6,7 @@ import (
"os"
"testing"
"github.com/mewkiz/flac"
"git.gammaspectra.live/S.O.N.G/flacgo"
)
func TestSkipID3v2(t *testing.T) {

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@ -10,19 +10,20 @@
// of the channels and the difference between the channels, or store the average
// of the channels and their difference. An encoder decorrelates audio samples
// as follows:
// mid = (left + right)/2 // average of the channels
// side = left - right // difference between the channels
//
// mid = (left + right)/2 // average of the channels
// side = left - right // difference between the channels
//
// The blocks are encoded using a variety of prediction methods [4][5] and
// stored in frames. Blocks and subblocks contains unencoded audio samples while
// frames and subframes contain encoded audio samples. A FLAC stream contains
// one or more audio frames.
//
// [1]: https://www.xiph.org/flac/format.html#architecture
// [2]: https://www.xiph.org/flac/format.html#blocking
// [3]: https://www.xiph.org/flac/format.html#interchannel
// [4]: https://www.xiph.org/flac/format.html#prediction
// [5]: https://godoc.org/github.com/mewkiz/flac/frame#Pred
// [1]: https://www.xiph.org/flac/format.html#architecture
// [2]: https://www.xiph.org/flac/format.html#blocking
// [3]: https://www.xiph.org/flac/format.html#interchannel
// [4]: https://www.xiph.org/flac/format.html#prediction
// [5]: https://godoc.org/git.gammaspectra.live/S.O.N.G/flacgo/frame#Pred
package frame
import (
@ -33,11 +34,11 @@ import (
"io"
"log"
"github.com/mewkiz/flac/internal/bits"
"github.com/mewkiz/flac/internal/hashutil"
"github.com/mewkiz/flac/internal/hashutil/crc16"
"github.com/mewkiz/flac/internal/hashutil/crc8"
"github.com/mewkiz/flac/internal/utf8"
"git.gammaspectra.live/S.O.N.G/flacgo/internal/bits"
"git.gammaspectra.live/S.O.N.G/flacgo/internal/hashutil"
"git.gammaspectra.live/S.O.N.G/flacgo/internal/hashutil/crc16"
"git.gammaspectra.live/S.O.N.G/flacgo/internal/hashutil/crc8"
"git.gammaspectra.live/S.O.N.G/flacgo/internal/utf8"
)
// A Frame contains the header and subframes of an audio frame. It holds the
@ -531,18 +532,20 @@ func (frame *Frame) parseSampleRate(br *bits.Reader, sampleRate uint64) error {
type Channels uint8
// Channel assignments. The following abbreviations are used:
// C: center (directly in front)
// R: right (standard stereo)
// Sr: side right (directly to the right)
// Rs: right surround (back right)
// Cs: center surround (rear center)
// Ls: left surround (back left)
// Sl: side left (directly to the left)
// L: left (standard stereo)
// Lfe: low-frequency effect (placed according to room acoustics)
//
// C: center (directly in front)
// R: right (standard stereo)
// Sr: side right (directly to the right)
// Rs: right surround (back right)
// Cs: center surround (rear center)
// Ls: left surround (back left)
// Sl: side left (directly to the left)
// L: left (standard stereo)
// Lfe: low-frequency effect (placed according to room acoustics)
//
// The first 6 channel constants follow the SMPTE/ITU-R channel order:
// L R C Lfe Ls Rs
//
// L R C Lfe Ls Rs
const (
ChannelsMono Channels = iota // 1 channel: mono.
ChannelsLR // 2 channels: left, right.
@ -582,8 +585,9 @@ func (channels Channels) Count() int {
// subframes.
//
// An encoder decorrelates audio samples as follows:
// mid = (left + right)/2
// side = left - right
//
// mid = (left + right)/2
// side = left - right
func (frame *Frame) correlate() {
switch frame.Channels {
case ChannelsLeftSide:

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@ -6,7 +6,7 @@ import (
"io"
"testing"
"github.com/mewkiz/flac"
"git.gammaspectra.live/S.O.N.G/flacgo"
)
var golden = []struct {

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@ -5,7 +5,7 @@ import (
"fmt"
"log"
"github.com/mewkiz/flac/internal/bits"
"git.gammaspectra.live/S.O.N.G/flacgo/internal/bits"
)
// A Subframe contains the encoded audio samples from one channel of an audio
@ -237,11 +237,11 @@ func (subframe *Subframe) decodeVerbatim(br *bits.Reader, bps uint) error {
// fixedCoeffs maps from prediction order to the LPC coefficients used in fixed
// encoding.
//
// x_0[n] = 0
// x_1[n] = x[n-1]
// x_2[n] = 2*x[n-1] - x[n-2]
// x_3[n] = 3*x[n-1] - 3*x[n-2] + x[n-3]
// x_4[n] = 4*x[n-1] - 6*x[n-2] + 4*x[n-3] - x[n-4]
// x_0[n] = 0
// x_1[n] = x[n-1]
// x_2[n] = 2*x[n-1] - x[n-2]
// x_3[n] = 3*x[n-1] - 3*x[n-2] + x[n-3]
// x_4[n] = 4*x[n-1] - 6*x[n-2] + 4*x[n-3] - x[n-4]
var fixedCoeffs = [...][]int32{
// ref: Section 2.2 of http://www.hpl.hp.com/techreports/1999/HPL-1999-144.pdf
1: {1},

2
go.mod
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@ -1,4 +1,4 @@
module github.com/mewkiz/flac
module git.gammaspectra.live/S.O.N.G/flacgo
go 1.14

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@ -7,7 +7,7 @@
// http://www.ross.net/crc/download/crc_v3.txt for information.
package crc16
import "github.com/mewkiz/flac/internal/hashutil"
import "git.gammaspectra.live/S.O.N.G/flacgo/internal/hashutil"
// Size of a CRC-16 checksum in bytes.
const Size = 2

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@ -7,7 +7,7 @@
// http://www.ross.net/crc/download/crc_v3.txt for information.
package crc8
import "github.com/mewkiz/flac/internal/hashutil"
import "git.gammaspectra.live/S.O.N.G/flacgo/internal/hashutil"
// Size of a CRC-8 checksum in bytes.
const Size = 1

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@ -6,7 +6,7 @@ import (
"fmt"
"io"
"github.com/mewkiz/flac/internal/ioutilx"
"git.gammaspectra.live/S.O.N.G/flacgo/internal/ioutilx"
)
const (
@ -40,24 +40,24 @@ const (
// ref: http://permalink.gmane.org/gmane.comp.audio.compression.flac.devel/3033
//
// Algorithm description:
// - read one byte B0 from the stream
// - if B0 = 0xxxxxxx then the read value is B0 -> end
// - if B0 = 10xxxxxx, the encoding is invalid
// - if B0 = 11xxxxxx, set L to the number of leading binary 1s minus 1:
// B0 = 110xxxxx -> L = 1
// B0 = 1110xxxx -> L = 2
// B0 = 11110xxx -> L = 3
// B0 = 111110xx -> L = 4
// B0 = 1111110x -> L = 5
// B0 = 11111110 -> L = 6
// - assign the bits following the encoding (the x bits in the examples) to
// a variable R with a magnitude of at least 36 bits
// - loop from 1 to L
// - left shift R 6 bits
// - read B from the stream
// - if B does not match 10xxxxxx, the encoding is invalid
// - set R = R or <the lower 6 bits from B>
// - the read value is R
// - read one byte B0 from the stream
// - if B0 = 0xxxxxxx then the read value is B0 -> end
// - if B0 = 10xxxxxx, the encoding is invalid
// - if B0 = 11xxxxxx, set L to the number of leading binary 1s minus 1:
// B0 = 110xxxxx -> L = 1
// B0 = 1110xxxx -> L = 2
// B0 = 11110xxx -> L = 3
// B0 = 111110xx -> L = 4
// B0 = 1111110x -> L = 5
// B0 = 11111110 -> L = 6
// - assign the bits following the encoding (the x bits in the examples) to
// a variable R with a magnitude of at least 36 bits
// - loop from 1 to L
// - left shift R 6 bits
// - read B from the stream
// - if B does not match 10xxxxxx, the encoding is invalid
// - set R = R or <the lower 6 bits from B>
// - the read value is R
func Decode(r io.Reader) (x uint64, err error) {
c0, err := ioutilx.ReadByte(r)
if err != nil {

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@ -3,7 +3,7 @@ package utf8
import (
"io"
"github.com/mewkiz/flac/internal/ioutilx"
"git.gammaspectra.live/S.O.N.G/flacgo/internal/ioutilx"
"github.com/mewkiz/pkg/errutil"
)

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@ -8,23 +8,24 @@
//
// At the time of this writing, the FLAC metadata format defines seven different
// metadata block types, namely:
// * StreamInfo [2]
// * Padding [3]
// * Application [4]
// * SeekTable [5]
// * VorbisComment [6]
// * CueSheet [7]
// * Picture [8]
// - StreamInfo [2]
// - Padding [3]
// - Application [4]
// - SeekTable [5]
// - VorbisComment [6]
// - CueSheet [7]
// - Picture [8]
//
// Please refer to their respective documentation for further information.
//
// [1]: https://www.xiph.org/flac/format.html#format_overview
// [2]: https://godoc.org/github.com/mewkiz/flac/meta#StreamInfo
// [3]: https://www.xiph.org/flac/format.html#metadata_block_padding
// [4]: https://godoc.org/github.com/mewkiz/flac/meta#Application
// [5]: https://godoc.org/github.com/mewkiz/flac/meta#SeekTable
// [6]: https://godoc.org/github.com/mewkiz/flac/meta#VorbisComment
// [7]: https://godoc.org/github.com/mewkiz/flac/meta#CueSheet
// [8]: https://godoc.org/github.com/mewkiz/flac/meta#Picture
// [1]: https://www.xiph.org/flac/format.html#format_overview
// [2]: https://godoc.org/git.gammaspectra.live/S.O.N.G/flacgo/meta#StreamInfo
// [3]: https://www.xiph.org/flac/format.html#metadata_block_padding
// [4]: https://godoc.org/git.gammaspectra.live/S.O.N.G/flacgo/meta#Application
// [5]: https://godoc.org/git.gammaspectra.live/S.O.N.G/flacgo/meta#SeekTable
// [6]: https://godoc.org/git.gammaspectra.live/S.O.N.G/flacgo/meta#VorbisComment
// [7]: https://godoc.org/git.gammaspectra.live/S.O.N.G/flacgo/meta#CueSheet
// [8]: https://godoc.org/git.gammaspectra.live/S.O.N.G/flacgo/meta#Picture
package meta
import (
@ -32,7 +33,7 @@ import (
"io"
"io/ioutil"
"github.com/mewkiz/flac/internal/bits"
"git.gammaspectra.live/S.O.N.G/flacgo/internal/bits"
)
// A Block contains the header and body of a metadata block.

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@ -6,8 +6,8 @@ import (
"reflect"
"testing"
"github.com/mewkiz/flac"
"github.com/mewkiz/flac/meta"
"git.gammaspectra.live/S.O.N.G/flacgo"
"git.gammaspectra.live/S.O.N.G/flacgo/meta"
)
var golden = []struct {

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@ -6,7 +6,7 @@ import (
"fmt"
"io"
"github.com/mewkiz/flac/internal/bits"
"git.gammaspectra.live/S.O.N.G/flacgo/internal/bits"
)
// StreamInfo contains the basic properties of a FLAC audio stream, such as its