mirror of
https://github.com/linux-do/new-api.git
synced 2025-09-17 16:06:38 +08:00
32 lines
786 B
Go
32 lines
786 B
Go
package service
|
|
|
|
import (
|
|
"encoding/base64"
|
|
"fmt"
|
|
)
|
|
|
|
func parseAudio(audioBase64 string, format string) (duration float64, err error) {
|
|
audioData, err := base64.StdEncoding.DecodeString(audioBase64)
|
|
if err != nil {
|
|
return 0, fmt.Errorf("base64 decode error: %v", err)
|
|
}
|
|
|
|
var samplesCount int
|
|
var sampleRate int
|
|
|
|
switch format {
|
|
case "pcm16":
|
|
samplesCount = len(audioData) / 2 // 16位 = 2字节每样本
|
|
sampleRate = 24000 // 24kHz
|
|
case "g711_ulaw", "g711_alaw":
|
|
samplesCount = len(audioData) // 8位 = 1字节每样本
|
|
sampleRate = 8000 // 8kHz
|
|
default:
|
|
samplesCount = len(audioData) // 8位 = 1字节每样本
|
|
sampleRate = 8000 // 8kHz
|
|
}
|
|
|
|
duration = float64(samplesCount) / float64(sampleRate)
|
|
return duration, nil
|
|
}
|