在錄制麥克風時，錄制的塊是原始的PCM8格式，我能夠通過更改bitDepthInBytes = 2來發送它并播放它而沒有任何噪音，但是當我通過網絡發送編碼的opus幀并將它們解碼為PCM16時，除非我將它們轉換為PCM8，否則我無法播放它們，但它很嘈雜。這是我的代碼：const sampleRate = 48000const channels = 1........ dec, err := opus.NewDecoder(sampleRate, channels) if err != nil { fmt.Println(err) return } var frameSizeMs float32 = 20 frameSize := int(channels * frameSizeMs * sampleRate / 1000) pcm := make([]int16, frameSize) // (sampleRate int, channelNum int, bitDepthInBytes int, bufferSizeInBytes int) context, err := oto.NewContext(sampleRate, channels, 1, frameSize*2) if err != nil { log.Fatal(err) } player := context.NewPlayer() ... ... _, err := dec.Decode(data, pcm) if err != nil { fmt.Println(err) } var mask uint16 = 0x8000 pcm8 := make([]byte, frameSize) for i := 0; i < frameSize; i++ { // using this work and play sound but it has noise pcm8[i] = byte((uint16(pcm[i]) ^ mask) >> 8) } _, _ = player.Write(pcm8)
1 回答
三國紛爭
TA貢獻1804條經驗 獲得超7個贊
通過閱讀本文，我能夠知道如何將PCM緩沖區格式化為可播放的音頻字節 https://github.com/philfrei/AudioCue/blob/master/src/main/java/com/adonax/audiocue/AudioCue.java，這是我使用的片段：
public static byte[] fromBufferToAudioBytes(byte[] audioBytes, float[] buffer)
{
for (int i = 0, n = buffer.length; i < n; i++)
{
buffer[i] *= 32767;
audioBytes[i*2] = (byte) buffer[i];
audioBytes[i*2 + 1] = (byte)((int)buffer[i] >> 8 );
}
return audioBytes;
}
這是我在代碼中更新的內容
pcm8 := make([]byte, frameSize * 2)
for i := 0; i < frameSize; i++ {
//pcm[i] *= 32767 // uncomment when pcm array is float insteand of int16
pcm8[i*2] = byte(uint16(pcm[i]))
pcm8[i*2 + 1] = byte(uint16(pcm[i]) >> 8)
}
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