PDF的WAV大尾数格式

时间:2019-10-28 11:03:50

标签: go pdf wav

当我解析PDF以便从那里提取.WAV时,它没有标题。因此,我需要为BigEndian格式的数据生成标头,因为PDF WAV存储在BigEndian中,并且将BigEndian转换为LittleEndian占用大量资源。 在这里,我有代码生成带有littleendian数据的wav标头,并且效果很好:

bits := 16
    pcmLen := len(samples) * 2
    samplingRate := format.sampleRate
    numChannels := format.channels
    blockAlign := (numChannels * bits) >> 3
    // jshint bitwise:true
    RIFF := 0x46464952 // Resource Interchange File Format
    WAVE := 0x45564157 // Wave
    FMT := 0x20746D66  // Format
    DATA := 0x61746164 // Audio Data
    buf := new(bytes.Buffer)
    _ = binary.Write(buf, binary.LittleEndian, uint32(RIFF))
    _ = binary.Write(buf, binary.LittleEndian, uint32(32+pcmLen))
    _ = binary.Write(buf, binary.LittleEndian, uint32(WAVE))
    _ = binary.Write(buf, binary.LittleEndian, uint32(FMT))
    _ = binary.Write(buf, binary.LittleEndian, uint32(16))
    _ = binary.Write(buf, binary.LittleEndian, uint16(1))
    _ = binary.Write(buf, binary.LittleEndian, uint16(numChannels))
    _ = binary.Write(buf, binary.LittleEndian, uint32(samplingRate))
    _ = binary.Write(buf, binary.LittleEndian, uint32(samplingRate*blockAlign))
    _ = binary.Write(buf, binary.LittleEndian, uint16(blockAlign))
    _ = binary.Write(buf, binary.LittleEndian, uint16(bits))
    _ = binary.Write(buf, binary.LittleEndian, uint32(DATA))
    _ = binary.Write(buf, binary.LittleEndian, uint32(pcmLen))

如何为bigEndian生成标头?可能吗? 我尝试使用RIFX格式,但标准媒体播放器不支持

0 个答案:

没有答案