Added decode tool to show audio information
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SSH key fingerprint:
SHA256:OLTRf6Fl87G52SiR7sWLGNzlJt4WOX+tfI2yxo0z7xk
141
cmd/decode/decode.go
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141
cmd/decode/decode.go
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package main
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import (
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"crypto/md5"
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"encoding/hex"
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"flag"
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"git.gammaspectra.live/S.O.N.G/Kirika/audio"
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"git.gammaspectra.live/S.O.N.G/Kirika/audio/format"
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"git.gammaspectra.live/S.O.N.G/Kirika/audio/format/guess"
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"git.gammaspectra.live/S.O.N.G/Kirika/hasher"
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"hash"
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"log"
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"os"
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"runtime"
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"strconv"
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"time"
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"unsafe"
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)
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func main() {
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inputFile := flag.String("input", "", "Input file to decode")
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flag.Parse()
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fp, err := os.Open(*inputFile)
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if err != nil {
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log.Panic(err)
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return
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}
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defer fp.Close()
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log.Printf("File: %s\n", *inputFile)
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decoders, err := guess.GetDecoders(fp, *inputFile)
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if err != nil {
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log.Panic(err)
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return
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}
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log.Print("Available decoders:\n")
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for _, d := range decoders {
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if ad, ok := d.(format.AnalyzerDecoder); ok {
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log.Printf("\t%s: %s (analyzer)", ad.Name(), ad.DecoderDescription())
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} else {
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log.Printf("\t%s: %s", d.Name(), d.DecoderDescription())
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}
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}
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startTime := time.Now()
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source, analyzer, err := guess.OpenAnalyzer(fp, decoders)
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if err != nil {
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source, err = guess.Open(fp, decoders)
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}
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if err != nil {
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log.Panic(err)
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return
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}
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var h *hasher.Hasher
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if analyzer != nil {
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h = hasher.NewHasher(analyzer, hasher.HashtypeMd5)
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}
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var rawFloat32Hasher hash.Hash
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var sampleCount, blockCount uint64
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if f32Source, ok := source.(audio.TypedSource[float32]); ok {
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rawFloat32Hasher = md5.New()
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log.Printf("Decoding as float32 @ %dHz %d channel(s)", f32Source.GetSampleRate(), f32Source.GetChannels())
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for b := range f32Source.GetBlocks() {
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blockCount++
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sampleCount += uint64(len(b))
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func() {
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defer runtime.KeepAlive(b)
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rawFloat32Hasher.Write(unsafe.Slice((*byte)(unsafe.Pointer(&b[0])), len(b)*int(unsafe.Sizeof(float32(0)))))
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}()
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}
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sampleCount /= uint64(f32Source.GetChannels())
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} else if i16Source, ok := source.(audio.TypedSource[int16]); ok {
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log.Printf("Decoding as int16 %d-bit @ %dHz %d channel(s)", i16Source.GetBitDepth(), i16Source.GetSampleRate(), i16Source.GetChannels())
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for b := range i16Source.GetBlocks() {
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blockCount++
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sampleCount += uint64(len(b))
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}
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sampleCount /= uint64(i16Source.GetChannels())
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} else if i32Source, ok := source.(audio.TypedSource[int32]); ok {
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log.Printf("Decoding as int32 %d-bit @ %dHz %d channel(s)", i32Source.GetBitDepth(), i32Source.GetSampleRate(), i32Source.GetChannels())
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for b := range i32Source.GetBlocks() {
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blockCount++
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sampleCount += uint64(len(b))
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}
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sampleCount /= uint64(i32Source.GetChannels())
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} else {
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rawFloat32Hasher = md5.New()
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f32Source = source.ToFloat32()
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log.Printf("Decoding as float32 (generic) %d-bit @ %dHz %d channel(s)", f32Source.GetBitDepth(), f32Source.GetSampleRate(), f32Source.GetChannels())
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for b := range f32Source.GetBlocks() {
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blockCount++
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sampleCount += uint64(len(b))
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func() {
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defer runtime.KeepAlive(b)
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rawFloat32Hasher.Write(unsafe.Slice((*byte)(unsafe.Pointer(&b[0])), len(b)*int(unsafe.Sizeof(float32(0)))))
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}()
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}
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sampleCount /= uint64(f32Source.GetChannels())
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}
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log.Printf("Decoded %d sample(s)", sampleCount)
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if blockCount > 0 {
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log.Printf("Processed %d blocks(s) (avg %0.2f sample(s) per block)", blockCount, float64(sampleCount)/float64(blockCount))
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}
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log.Printf("Duration %s", ((time.Duration(sampleCount) * time.Second) / time.Duration(source.GetSampleRate())).String())
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if h != nil {
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h.Wait()
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log.Printf("MD5 hash: %s", hex.EncodeToString(h.GetResult()))
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if _, ok := source.(audio.TypedSource[float32]); ok {
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log.Printf("\tCheck via $ ffmpeg -hide_banner -loglevel error -i %s -vn -c:a pcm_f32le -f md5 -", strconv.Quote(*inputFile))
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} else {
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switch source.GetBitDepth() {
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case 8, 16, 24, 32:
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log.Printf("\tCheck via $ ffmpeg -hide_banner -loglevel error -i %s -vn -c:a pcm_s%dle -f md5 -", strconv.Quote(*inputFile), source.GetBitDepth())
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default:
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log.Printf("\tCheck via $ ffmpeg -hide_banner -loglevel error -i %s -vn -c:a pcm_s32le -f md5 -", strconv.Quote(*inputFile))
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}
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}
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} else if rawFloat32Hasher != nil {
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log.Printf("MD5 hash: %s", hex.EncodeToString(rawFloat32Hasher.Sum(nil)))
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if _, ok := source.(audio.TypedSource[float32]); ok {
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log.Printf("\tCheck via $ ffmpeg -hide_banner -loglevel error -i %s -vn -c:a pcm_f32le -f md5 -", strconv.Quote(*inputFile))
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log.Printf("\tNote that you might need to specify a decoder with -c:a before -i to perfectly match the hash on lossy decoders, for example, libopus instead of opus")
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}
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}
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log.Printf("Took %s", time.Now().Sub(startTime).String())
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}
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