64 lines
1.2 KiB
Go
64 lines
1.2 KiB
Go
package speech
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"fmt"
|
|
"os"
|
|
"os/exec"
|
|
"path/filepath"
|
|
|
|
"github.com/google/uuid"
|
|
)
|
|
|
|
type FFmpegConverter struct {
|
|
ffmpegPath string
|
|
tempDir string
|
|
}
|
|
|
|
func NewFFmpegConverter(ffmpegPath, tempDir string) *FFmpegConverter {
|
|
if ffmpegPath == "" {
|
|
ffmpegPath = "ffmpeg"
|
|
}
|
|
if tempDir == "" {
|
|
tempDir = os.TempDir()
|
|
}
|
|
return &FFmpegConverter{ffmpegPath: ffmpegPath, tempDir: tempDir}
|
|
}
|
|
|
|
func (c *FFmpegConverter) Convert(ctx context.Context, input []byte, fromMime, toMime string) ([]byte, error) {
|
|
id := uuid.New().String()
|
|
inFile := filepath.Join(c.tempDir, id+".input")
|
|
outFile := filepath.Join(c.tempDir, id+".wav")
|
|
|
|
defer os.Remove(inFile)
|
|
defer os.Remove(outFile)
|
|
|
|
if err := os.WriteFile(inFile, input, 0600); err != nil {
|
|
return nil, fmt.Errorf("write temp input: %w", err)
|
|
}
|
|
|
|
cmd := exec.CommandContext(ctx, c.ffmpegPath,
|
|
"-i", inFile,
|
|
"-ar", "16000",
|
|
"-ac", "1",
|
|
"-f", "wav",
|
|
"-y",
|
|
outFile,
|
|
)
|
|
|
|
var stderr bytes.Buffer
|
|
cmd.Stderr = &stderr
|
|
|
|
if err := cmd.Run(); err != nil {
|
|
return nil, fmt.Errorf("ffmpeg conversion: %w: %s", err, stderr.String())
|
|
}
|
|
|
|
out, err := os.ReadFile(outFile)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("read converted file: %w", err)
|
|
}
|
|
|
|
return out, nil
|
|
}
|