wavwriter

Documentation

Overview

Package wavwriter provides a media writer that writes bytes in μ-law (PCMU) or A-law (PCMA) format to a WAV file.

Index

• Constants
• Variables
• type WavWriter
  • func New(fileName string, sampleRate uint32, channelCount uint16, pcmType int) (*WavWriter, error)
  • func (i *WavWriter) Close() error
  • func (i *WavWriter) DecodePcmaToPcmWrite(pcma []byte) error
  • func (i *WavWriter) DecodePcmuToPcmWrite(pcmu []byte) error
  • func (i *WavWriter) Write(bs []byte) error
  • func (i *WavWriter) WriteInt16(int16Data []int16) error
  • func (i *WavWriter) WriteRTP(packet *rtp.Packet) error

Constants

const (
	WavAudioFormatPcmRaw = 1 //no compression, raw (linear) pcm
	// a WavAudioFormat value of 6 or 7 would indicate that the audio data is stored in the A-law or μ-law format, which are forms of compressed PCM commonly used in telephony.
	WavAudioFormatPcmA = 6 //A-law
	WavAudioFormatPcmU = 7 //μ-law
)

Variables

var AvailablePcmTypes = []int{WavAudioFormatPcmRaw, WavAudioFormatPcmA, WavAudioFormatPcmU}

var ErrorInvalidPcmType = fmt.Errorf("invalid pcm type")

Types

type WavWriter

type WavWriter struct {
	// contains filtered or unexported fields
}

func New

func New(fileName string, sampleRate uint32, channelCount uint16, pcmType int) (*WavWriter, error)

func (*WavWriter) Close

func (i *WavWriter) Close() error

Close stops the recording

func (*WavWriter) DecodePcmaToPcmWrite

func (i *WavWriter) DecodePcmaToPcmWrite(pcma []byte) error

func (*WavWriter) DecodePcmuToPcmWrite

func (i *WavWriter) DecodePcmuToPcmWrite(pcmu []byte) error

func (*WavWriter) Write

func (i *WavWriter) Write(bs []byte) error

func (*WavWriter) WriteInt16

func (i *WavWriter) WriteInt16(int16Data []int16) error

func (*WavWriter) WriteRTP

func (i *WavWriter) WriteRTP(packet *rtp.Packet) error

WriteRTP adds a new packet and writes the appropriate headers for it