Merge pull request #4 from pablodz/dev

fix

examples/bytesulaw2wav/main.go

@@ -0,0 +1,71 @@
+package main
+
+import (
+	"bytes"
+	"os"
+
+	"github.com/pablodz/sopro/pkg/audioconfig"
+	"github.com/pablodz/sopro/pkg/cpuarch"
+	"github.com/pablodz/sopro/pkg/encoding"
+	"github.com/pablodz/sopro/pkg/fileformat"
+	"github.com/pablodz/sopro/pkg/method"
+	"github.com/pablodz/sopro/pkg/transcoder"
+)
+
+func main() {
+	data := []byte{0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, 4, 2, 3, 3, 5, 1, 7, 8, 1, 4, 0}
+	// Open the input file
+	in := bytes.NewBuffer(data)
+
+	// Create the output file
+	out, err := os.Create("./internal/samples/output.wav")
+	if err != nil {
+		panic(err)
+	}
+	defer out.Close()
+
+	// create a transcoder
+	t := &transcoder.Transcoder{
+		MethodT: method.BIT_LOOKUP_TABLE,
+		SourceConfigs: transcoder.TranscoderAudioConfig{
+			Endianness: cpuarch.LITTLE_ENDIAN,
+		},
+		TargetConfigs: transcoder.TranscoderAudioConfig{
+			Endianness: cpuarch.LITTLE_ENDIAN,
+		},
+		SizeBuffer: 1024,
+		Verbose:    true,
+	}
+
+	// Transcode the file
+	err = t.Mulaw2Wav(
+		&transcoder.AudioFileIn{
+			Data: in,
+			AudioFileGeneral: transcoder.AudioFileGeneral{
+				Format: fileformat.AUDIO_MULAW,
+				Config: audioconfig.MulawConfig{
+					BitDepth:   8,
+					Channels:   1,
+					Encoding:   encoding.SPACE_LOGARITHMIC, // ulaw is logarithmic
+					SampleRate: 8000,
+				},
+			},
+		},
+		&transcoder.AudioFileOut{
+			Data: out,
+			AudioFileGeneral: transcoder.AudioFileGeneral{
+				Format: fileformat.AUDIO_WAV,
+				Config: audioconfig.WavConfig{
+					BitDepth:   8,
+					Channels:   1,
+					Encoding:   encoding.SPACE_LOGARITHMIC,
+					SampleRate: 8000,
+				},
+			},
+		},
+	)
+
+	if err != nil {
+		panic(err)
+	}
+}

examples/linear_resampler/main.go

@@ -12,7 +12,6 @@ import (
 )
 
 func main() {
-
 	// Open the input file
 	in, err := os.Open("./internal/samples/v1_16b_16000.wav")
 	if err != nil {
@@ -71,5 +70,4 @@ func main() {
 	if err != nil {
 		panic(err)
 	}
-
 }

examples/ulaw2wav_logpcm/main.go

@@ -12,7 +12,6 @@ import (
 )
 
 func main() {
-
 	// Open the input file
 	in, err := os.Open("./internal/samples/recording.ulaw")
 	if err != nil {
@@ -71,5 +70,4 @@ func main() {
 	if err != nil {
 		panic(err)
 	}
-
 }

examples/ulaw2wav_lpcm/main.go

@@ -12,7 +12,6 @@ import (
 )
 
 func main() {
-
 	// Open the input file
 	in, err := os.Open("./internal/samples/recording.ulaw")
 	if err != nil {
@@ -71,5 +70,4 @@ func main() {
 	if err != nil {
 		panic(err)
 	}
-
 }

pkg/resampler/linear.go

@@ -1,7 +1,6 @@
 package resampler
 
 func LinearInterpolation[T int16 | int32 | int64 | int | byte](data []T, ratio float64) ([]T, error) {
-
 	// Calculate the length of the resampled data slice.
 	resampledLength := int(float64(len(data)) / ratio)
 

pkg/transcoder/mulaw2wav.go

@@ -2,6 +2,7 @@ package transcoder
 
 import (
 	"bufio"
+	"bytes"
 	"fmt"
 	"io"
 	"log"
@@ -16,7 +17,6 @@ import (
 )
 
 func init() {
-
 	err := error(nil)
 	WIDTH_TERMINAL, HEIGHT_TERMINAL, err = term.GetSize(0)
 	if err != nil {
@@ -28,7 +28,6 @@ func init() {
 // https://raw.githubusercontent.com/corkami/pics/master/binary/WAV.png
 // http://www.topherlee.com/software/pcm-tut-wavformat.html
 func mulaw2WavLpcm(in *AudioFileIn, out *AudioFileOut, transcoder *Transcoder) (err error) {
-
 	// read all the file
 	if transcoder.Verbose {
 		graphIn(in)
@@ -143,11 +142,16 @@ func mulaw2WavLpcm(in *AudioFileIn, out *AudioFileOut, transcoder *Transcoder) (
 	}
 
 	return nil
-
 }
 
 func graphIn(in *AudioFileIn) {
 	log.Println("[WARNING] Reading the whole file into memory. This may take a while...")
+	// check if in is *bytes.Buffer
+	if _, ok := in.Data.(*bytes.Buffer); ok {
+		log.Println("Input file is a bytes.Buffer")
+		return
+	}
+
 	// make an independent copy of the file
 	file := in.Data.(*os.File)
 	f, err := os.Open(file.Name())
@@ -179,6 +183,11 @@ func graphIn(in *AudioFileIn) {
 
 func graphOut(in *AudioFileIn, out *AudioFileOut) {
 	log.Println("[WARNING] Reading the whole file into memory. This may take a while...")
+	// check if in is *bytes.Buffer
+	if _, ok := in.Data.(*bytes.Buffer); ok {
+		log.Println("Input file is a bytes.Buffer")
+		return
+	}
 	file := in.Data.(*os.File)
 	f, err := os.Open(file.Name())
 	if err != nil {

pkg/transcoder/mulaw2wavlogpcm.go

@@ -14,7 +14,6 @@ import (
 )
 
 func init() {
-
 	err := error(nil)
 	WIDTH_TERMINAL, HEIGHT_TERMINAL, err = term.GetSize(0)
 	if err != nil {
@@ -26,7 +25,6 @@ func init() {
 // https://raw.githubusercontent.com/corkami/pics/master/binary/WAV.png
 // http://www.topherlee.com/software/pcm-tut-wavformat.html
 func mulaw2WavLogpcm(in *AudioFileIn, out *AudioFileOut, transcoder *Transcoder) (err error) {
-
 	// read all the file
 	if transcoder.Verbose {
 		graphIn(in)
@@ -141,5 +139,4 @@ func mulaw2WavLogpcm(in *AudioFileIn, out *AudioFileOut, transcoder *Transcoder)
 	}
 
 	return nil
-
 }

pkg/transcoder/resampling_general.go

@@ -12,7 +12,6 @@ import (
 var doOnceResampling sync.Once
 
 func ResampleBytes(in *AudioFileIn, out *AudioFileOut, transcoder *Transcoder) error {
-
 	bitsProcessed, err := differentSampleRate(in, out, transcoder)
 	if err != nil {
 		return err

pkg/transcoder/router.go

@@ -9,28 +9,30 @@ import (
 	"github.com/pablodz/sopro/pkg/resampler"
 )
 
-var WIDTH_TERMINAL = 80
-var HEIGHT_TERMINAL = 30
+var (
+	WIDTH_TERMINAL  = 80
+	HEIGHT_TERMINAL = 30
+)
 
 const ErrUnsupportedConversion = "unsupported conversion"
 
 func (t *Transcoder) Mulaw2Wav(in *AudioFileIn, out *AudioFileOut) error {
-
 	inSpace := in.Config.(audioconfig.MulawConfig).Encoding
 	outSpace := out.Config.(audioconfig.WavConfig).Encoding
 
 	switch {
-	case t.MethodT != method.BIT_LOOKUP_TABLE &&
+	case t.MethodT == method.BIT_LOOKUP_TABLE &&
 		inSpace == encoding.SPACE_LOGARITHMIC &&
 		outSpace == encoding.SPACE_LINEAR:
 		return mulaw2WavLpcm(in, out, t)
-	case t.MethodT != method.BIT_LOOKUP_TABLE &&
+	case t.MethodT == method.BIT_LOOKUP_TABLE &&
 		inSpace == encoding.SPACE_LOGARITHMIC &&
 		outSpace == encoding.SPACE_LOGARITHMIC:
 		return mulaw2WavLogpcm(in, out, t)
 	default:
 		return fmt.Errorf(
-			"%s: %s -> %s",
+			"[%s] %s: %s -> %s",
+			method.METHODS[t.MethodT],
 			ErrUnsupportedConversion,
 			encoding.ENCODINGS[inSpace],
 			encoding.ENCODINGS[outSpace],
@@ -40,7 +42,6 @@ func (t *Transcoder) Mulaw2Wav(in *AudioFileIn, out *AudioFileOut) error {
 }
 
 func (t *Transcoder) Wav2Wav(in *AudioFileIn, out *AudioFileOut) error {
-
 	inSpace := in.Config.(audioconfig.WavConfig).Encoding
 	outSpace := out.Config.(audioconfig.WavConfig).Encoding
 

pkg/transcoder/transcoding_general.go

@@ -12,7 +12,6 @@ import (
 var doOnceTranscoding sync.Once
 
 func TranscodeBytes(in *AudioFileIn, out *AudioFileOut, transcoder *Transcoder) error {
-
 	equalEncod := (transcoder.SourceConfigs.Encoding == transcoder.TargetConfigs.Encoding)
 	bitsProcessed := 0
 	err := error(nil)

pkg/transcoder/wavlpcm2wavlpcm.go

@@ -12,7 +12,6 @@ import (
 )
 
 func wavLpcm2wavLpcm(in *AudioFileIn, out *AudioFileOut, transcoder *Transcoder) (err error) {
-
 	// read all the file
 	if transcoder.Verbose {
 		graphIn(in)
@@ -129,5 +128,4 @@ func wavLpcm2wavLpcm(in *AudioFileIn, out *AudioFileOut, transcoder *Transcoder)
 	}
 
 	return nil
-
 }

utils/utils.go

@@ -30,7 +30,6 @@ func PrintGraphInt16(items []int16) {
 	fmt.Println("MaxX:   ", len(stringSlice))
 	fmt.Println("DeltaX: ", (len(stringSlice) - 0))
 	fmt.Println()
-
 }
 
 func PrintTableInt16(items []int16, numPerRow int) {