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feat(meta): write album art & metadata into destination file

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This commit is contained in:
Unlock Music Dev 2022-12-06 23:55:43 +08:00
parent 02e065aac4
commit fd6f830916
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GPG Key ID: 95202E10D3413A1D
5 changed files with 107 additions and 106 deletions
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6
algo/qmc/qmc.go
View File

@ -30,14 +30,14 @@ type Decoder struct {
songID int
rawMetaExtra2 int
albumID int
albumMediaID string
albumID int
albumMediaID string
// cache
meta common.AudioMeta
cover []byte
embeddedCover bool // embeddedCover is true if the cover is embedded in the file
probeBuf *bytes.Buffer // probeBuf is the buffer for sniffing metadata
probeBuf *bytes.Buffer // probeBuf is the buffer for sniffing metadata, TODO: consider pipe?
// provider
logger *zap.Logger

96
cmd/um/main.go
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@ -25,8 +25,10 @@ import (
_ "unlock-music.dev/cli/algo/tm"
_ "unlock-music.dev/cli/algo/xiami"
_ "unlock-music.dev/cli/algo/ximalaya"
"unlock-music.dev/cli/internal/ffmpeg"
"unlock-music.dev/cli/internal/logging"
"unlock-music.dev/cli/internal/sniff"
"unlock-music.dev/cli/internal/utils"
)
var AppVersion = "v0.0.6"
@ -187,60 +189,80 @@ func tryDecFile(inputFile string, outputDir string, allDec []common.NewDecoderFu
return errors.New("no any decoder can resolve the file")
}
params := &ffmpeg.UpdateMetadataParams{}
header := bytes.NewBuffer(nil)
_, err = io.CopyN(header, dec, 64)
if err != nil {
return fmt.Errorf("read header failed: %w", err)
}
outExt := sniff.AudioExtensionWithFallback(header.Bytes(), ".mp3")
inFilename := strings.TrimSuffix(filepath.Base(inputFile), filepath.Ext(inputFile))
outPath := filepath.Join(outputDir, inFilename+outExt)
outFile, err := os.OpenFile(outPath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0644)
if err != nil {
return err
}
defer outFile.Close()
if _, err := io.Copy(outFile, header); err != nil {
return err
}
if _, err := io.Copy(outFile, dec); err != nil {
return err
}
audio := io.MultiReader(header, dec)
params.AudioExt = sniff.AudioExtensionWithFallback(header.Bytes(), ".mp3")
if audioMetaGetter, ok := dec.(common.AudioMetaGetter); ok {
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
meta, err := audioMetaGetter.GetAudioMeta(ctx)
// since ffmpeg doesn't support multiple input streams,
// we need to write the audio to a temp file.
// since qmc decoder doesn't support seeking & relying on ffmpeg probe, we need to read the whole file.
// TODO: support seeking or using pipe for qmc decoder.
params.Audio, err = utils.WriteTempFile(audio, params.AudioExt)
if err != nil {
return fmt.Errorf("updateAudioMeta write temp file: %w", err)
}
defer os.Remove(params.Audio)
params.Meta, err = audioMetaGetter.GetAudioMeta(ctx)
if err != nil {
logger.Warn("get audio meta failed", zap.Error(err))
} else {
logger.Info("audio metadata",
zap.String("title", meta.GetTitle()),
zap.Strings("artists", meta.GetArtists()),
zap.String("album", meta.GetAlbum()),
)
}
if params.Meta == nil { // reset audio meta if failed
audio, err = os.Open(params.Audio)
if err != nil {
return fmt.Errorf("updateAudioMeta open temp file: %w", err)
}
}
}
if coverGetter, ok := dec.(common.CoverImageGetter); ok {
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
if params.Meta != nil {
if coverGetter, ok := dec.(common.CoverImageGetter); ok {
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
if cover, err := coverGetter.GetCoverImage(ctx); err != nil {
logger.Warn("get cover image failed", zap.Error(err))
} else if imgExt, ok := sniff.ImageExtension(cover); !ok {
logger.Warn("sniff cover image type failed", zap.Error(err))
} else {
params.AlbumArtExt = imgExt
params.AlbumArt = bytes.NewReader(cover)
}
}
}
inFilename := strings.TrimSuffix(filepath.Base(inputFile), filepath.Ext(inputFile))
outPath := filepath.Join(outputDir, inFilename+params.AudioExt)
if params.Meta == nil {
outFile, err := os.OpenFile(outPath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0644)
if err != nil {
return err
}
defer outFile.Close()
if _, err = io.Copy(outFile, audio); err != nil {
return err
}
outFile.Close()
} else {
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
defer cancel()
cover, err := coverGetter.GetCoverImage(ctx)
if err != nil {
logger.Warn("get cover image failed", zap.Error(err))
} else if imgExt, ok := sniff.ImageExtension(cover); !ok {
logger.Warn("sniff cover image type failed", zap.Error(err))
} else {
coverPath := filepath.Join(outputDir, inFilename+imgExt)
err = os.WriteFile(coverPath, cover, 0644)
if err != nil {
logger.Warn("write cover image failed", zap.Error(err))
}
if err := ffmpeg.UpdateAudioMetadata(ctx, outPath, params); err != nil {
return err
}
}

73
internal/ffmpeg/ffmpeg.go
View File

@ -10,6 +10,7 @@ import (
"strings"
"unlock-music.dev/cli/algo/common"
"unlock-music.dev/cli/internal/utils"
)
func ExtractAlbumArt(ctx context.Context, rd io.Reader) (*bytes.Buffer, error) {
@ -33,8 +34,8 @@ func ExtractAlbumArt(ctx context.Context, rd io.Reader) (*bytes.Buffer, error) {
}
type UpdateMetadataParams struct {
Audio io.Reader // required
AudioExt string // required
Audio string // required
AudioExt string // required
Meta common.AudioMeta // required
@ -42,24 +43,15 @@ type UpdateMetadataParams struct {
AlbumArtExt string // required if AlbumArt is not nil
}
func UpdateAudioMetadata(ctx context.Context, params *UpdateMetadataParams) (*bytes.Buffer, error) {
func UpdateAudioMetadata(ctx context.Context, outPath string, params *UpdateMetadataParams) error {
builder := newFFmpegBuilder()
builder.SetFlag("y") // overwrite output file
out := newOutputBuilder("pipe:1") // use stdout as output
out.AddOption("f", encodeFormatFromExt(params.AudioExt)) // use mp3 muxer
out := newOutputBuilder(outPath) // output to file
builder.SetFlag("y") // overwrite output file
builder.AddOutput(out)
// since ffmpeg doesn't support multiple input streams,
// we need to write the audio to a temp file
audioPath, err := writeTempFile(params.Audio, params.AudioExt)
if err != nil {
return nil, fmt.Errorf("updateAudioMeta write temp file: %w", err)
}
defer os.Remove(audioPath)
// input audio -> output audio
builder.AddInput(newInputBuilder(audioPath)) // input 0: audio
builder.AddInput(newInputBuilder(params.Audio)) // input 0: audio
out.AddOption("map", "0:a")
out.AddOption("codec:a", "copy")
@ -68,9 +60,9 @@ func UpdateAudioMetadata(ctx context.Context, params *UpdateMetadataParams) (*by
params.AudioExt != ".wav" /* wav doesn't support attached image */ {
// write cover to temp file
artPath, err := writeTempFile(params.AlbumArt, params.AlbumArtExt)
artPath, err := utils.WriteTempFile(params.AlbumArt, params.AlbumArtExt)
if err != nil {
return nil, fmt.Errorf("updateAudioMeta write temp file: %w", err)
return fmt.Errorf("updateAudioMeta write temp file: %w", err)
}
defer os.Remove(artPath)
@ -108,51 +100,10 @@ func UpdateAudioMetadata(ctx context.Context, params *UpdateMetadataParams) (*by
// execute ffmpeg
cmd := builder.Command(ctx)
stdout, stderr := &bytes.Buffer{}, &bytes.Buffer{}
cmd.Stdout, cmd.Stderr = stdout, stderr
if err := cmd.Run(); err != nil {
return nil, fmt.Errorf("ffmpeg run: %w", err)
if stdout, err := cmd.CombinedOutput(); err != nil {
return fmt.Errorf("ffmpeg run: %w, %s", err, string(stdout))
}
return stdout, nil
}
func writeTempFile(rd io.Reader, ext string) (string, error) {
audioFile, err := os.CreateTemp("", "*"+ext)
if err != nil {
return "", fmt.Errorf("ffmpeg create temp file: %w", err)
}
if _, err := io.Copy(audioFile, rd); err != nil {
return "", fmt.Errorf("ffmpeg write temp file: %w", err)
}
if err := audioFile.Close(); err != nil {
return "", fmt.Errorf("ffmpeg close temp file: %w", err)
}
return audioFile.Name(), nil
}
// encodeFormatFromExt returns the file format name the recognized & supporting encoding by ffmpeg.
func encodeFormatFromExt(ext string) string {
switch ext {
case ".flac":
return "flac" // raw FLAC
case ".mp3":
return "mp3" // MP3 (MPEG audio layer 3)
case ".ogg":
return "ogg" // Ogg
case ".m4a":
return "ipod" // iPod H.264 MP4 (MPEG-4 Part 14)
case ".wav":
return "wav" // WAV / WAVE (Waveform Audio)
case ".aac":
return "adts" // ADTS AAC (Advanced Audio Coding)
case ".wma":
return "asf" // ASF (Advanced / Active Streaming Format)
default:
return ""
}
return nil
}

14
internal/ffmpeg/ffprobe.go
View File

@ -1,6 +1,7 @@
package ffmpeg
import (
"bytes"
"context"
"encoding/json"
"io"
@ -119,17 +120,20 @@ func ProbeReader(ctx context.Context, rd io.Reader) (*Result, error) {
cmd := exec.CommandContext(ctx, "ffprobe",
"-v", "quiet", // disable logging
"-print_format", "json", // use json format
"-show_format", "-show_streams", // retrieve format and streams
"-", // input from stdin
"-show_format", "-show_streams", "-show_error", // retrieve format and streams
"pipe:0", // input from stdin
)
cmd.Stdin = rd
out, err := cmd.Output()
if err != nil {
stdout, stderr := &bytes.Buffer{}, &bytes.Buffer{}
cmd.Stdout, cmd.Stderr = stdout, stderr
if err := cmd.Run(); err != nil {
return nil, err
}
ret := new(Result)
if err := json.Unmarshal(out, ret); err != nil {
if err := json.Unmarshal(stdout.Bytes(), ret); err != nil {
return nil, err
}

24
internal/utils/temp.go Normal file
View File

@ -0,0 +1,24 @@
package utils
import (
"fmt"
"io"
"os"
)
func WriteTempFile(rd io.Reader, ext string) (string, error) {
audioFile, err := os.CreateTemp("", "*"+ext)
if err != nil {
return "", fmt.Errorf("ffmpeg create temp file: %w", err)
}
if _, err := io.Copy(audioFile, rd); err != nil {
return "", fmt.Errorf("ffmpeg write temp file: %w", err)
}
if err := audioFile.Close(); err != nil {
return "", fmt.Errorf("ffmpeg close temp file: %w", err)
}
return audioFile.Name(), nil
}