61 lines
1 KiB
Go
61 lines
1 KiB
Go
package packetizer
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import (
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"bufio"
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mp3parser "github.com/sssgun/mp3"
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"io"
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)
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type Mp3Packetizer struct {
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decoder *mp3parser.Decoder
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samples int64
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}
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type Mp3Packet struct {
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sampleNumber int64
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frame mp3parser.Frame
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}
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func (p *Mp3Packet) KeepMode() KeepMode {
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return Discard
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}
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func (p *Mp3Packet) GetStartSampleNumber() int64 {
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return p.sampleNumber
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}
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func (p *Mp3Packet) GetEndSampleNumber() int64 {
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return p.sampleNumber + int64(p.frame.Samples())
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}
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func (p *Mp3Packet) Category() int64 {
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return 0
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}
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func (p *Mp3Packet) GetData() []byte {
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return p.frame.Bytes()
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}
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func (p *Mp3Packet) GetDataOffset(_ int64) []byte {
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return p.GetData()
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}
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func NewMp3Packetizer(reader io.Reader) *Mp3Packetizer {
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return &Mp3Packetizer{decoder: mp3parser.NewDecoder(bufio.NewReader(reader))}
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}
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func (o *Mp3Packetizer) GetPacket() Packet {
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packet := &Mp3Packet{}
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var skipped int
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if err := o.decoder.Decode(&packet.frame, &skipped); err != nil {
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return nil
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}
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packet.sampleNumber = o.samples
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o.samples += int64(packet.frame.Samples())
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return packet
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}
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