mirror of
https://github.com/aler9/gortsplib
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108 lines
2.3 KiB
Go
108 lines
2.3 KiB
Go
package formats
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import (
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"github.com/pion/rtp"
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"github.com/bluenviron/gortsplib/v3/pkg/formats/rtpsimpleaudio"
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)
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// G711 is a RTP format for the G711 codec, encoded with mu-law or A-law.
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// Specification: https://datatracker.ietf.org/doc/html/rfc3551
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type G711 struct {
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// whether to use mu-law. Otherwise, A-law is used.
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MULaw bool
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}
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func (f *G711) unmarshal(payloadType uint8, _ string, _ string, _ string, _ map[string]string) error {
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f.MULaw = (payloadType == 0)
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return nil
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}
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// Codec implements Format.
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func (f *G711) Codec() string {
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return "G711"
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}
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// String implements Format.
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//
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// Deprecated: replaced by Codec().
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func (f *G711) String() string {
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return f.Codec()
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}
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// ClockRate implements Format.
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func (f *G711) ClockRate() int {
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return 8000
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}
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// PayloadType implements Format.
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func (f *G711) PayloadType() uint8 {
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if f.MULaw {
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return 0
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}
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return 8
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}
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// RTPMap implements Format.
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func (f *G711) RTPMap() string {
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if f.MULaw {
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return "PCMU/8000"
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}
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return "PCMA/8000"
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}
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// FMTP implements Format.
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func (f *G711) FMTP() map[string]string {
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return nil
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}
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// PTSEqualsDTS implements Format.
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func (f *G711) PTSEqualsDTS(*rtp.Packet) bool {
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return true
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}
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// CreateDecoder creates a decoder able to decode the content of the format.
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//
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// Deprecated: this has been replaced by CreateDecoder2() that can also return an error.
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func (f *G711) CreateDecoder() *rtpsimpleaudio.Decoder {
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d, _ := f.CreateDecoder2()
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return d
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}
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// CreateDecoder2 creates a decoder able to decode the content of the format.
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func (f *G711) CreateDecoder2() (*rtpsimpleaudio.Decoder, error) {
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d := &rtpsimpleaudio.Decoder{
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SampleRate: 8000,
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}
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err := d.Init()
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if err != nil {
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return nil, err
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}
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return d, nil
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}
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// CreateEncoder creates an encoder able to encode the content of the format.
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//
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// Deprecated: this has been replaced by CreateEncoder2() that can also return an error.
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func (f *G711) CreateEncoder() *rtpsimpleaudio.Encoder {
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e, _ := f.CreateEncoder2()
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return e
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}
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// CreateEncoder2 creates an encoder able to encode the content of the format.
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func (f *G711) CreateEncoder2() (*rtpsimpleaudio.Encoder, error) {
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e := &rtpsimpleaudio.Encoder{
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PayloadType: f.PayloadType(),
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SampleRate: 8000,
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}
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err := e.Init()
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if err != nil {
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return nil, err
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}
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return e, nil
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}
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