mirror of
https://github.com/aler9/gortsplib
synced 2025-10-31 18:42:40 +08:00
154 lines
3.0 KiB
Go
154 lines
3.0 KiB
Go
package formats
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import (
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"strconv"
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"strings"
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"github.com/pion/rtp"
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"github.com/bluenviron/gortsplib/v3/pkg/formats/rtplpcm"
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)
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// LPCM is a RTP format for the uncompressed, Linear PCM codec.
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// Specification: https://datatracker.ietf.org/doc/html/rfc3190
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type LPCM struct {
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PayloadTyp uint8
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BitDepth int
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SampleRate int
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ChannelCount int
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}
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func (f *LPCM) unmarshal(payloadType uint8, clock string, codec string, _ string, _ map[string]string) error {
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f.PayloadTyp = payloadType
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switch codec {
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case "l8":
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f.BitDepth = 8
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case "l16":
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f.BitDepth = 16
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case "l24":
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f.BitDepth = 24
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}
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tmp := strings.SplitN(clock, "/", 2)
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tmp1, err := strconv.ParseUint(tmp[0], 10, 31)
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if err != nil {
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return err
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}
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f.SampleRate = int(tmp1)
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if len(tmp) >= 2 {
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tmp1, err := strconv.ParseUint(tmp[1], 10, 31)
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if err != nil {
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return err
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}
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f.ChannelCount = int(tmp1)
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} else {
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f.ChannelCount = 1
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}
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return nil
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}
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// Codec implements Format.
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func (f *LPCM) Codec() string {
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return "LPCM"
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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 *LPCM) 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 *LPCM) ClockRate() int {
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return f.SampleRate
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}
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// PayloadType implements Format.
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func (f *LPCM) PayloadType() uint8 {
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return f.PayloadTyp
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}
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// RTPMap implements Format.
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func (f *LPCM) RTPMap() string {
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var codec string
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switch f.BitDepth {
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case 8:
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codec = "L8"
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case 16:
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codec = "L16"
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case 24:
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codec = "L24"
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}
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return codec + "/" + strconv.FormatInt(int64(f.SampleRate), 10) +
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"/" + strconv.FormatInt(int64(f.ChannelCount), 10)
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}
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// FMTP implements Format.
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func (f *LPCM) 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 *LPCM) 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 *LPCM) CreateDecoder() *rtplpcm.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 *LPCM) CreateDecoder2() (*rtplpcm.Decoder, error) {
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d := &rtplpcm.Decoder{
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BitDepth: f.BitDepth,
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SampleRate: f.SampleRate,
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ChannelCount: f.ChannelCount,
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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 *LPCM) CreateEncoder() *rtplpcm.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 *LPCM) CreateEncoder2() (*rtplpcm.Encoder, error) {
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e := &rtplpcm.Encoder{
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PayloadType: f.PayloadTyp,
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BitDepth: f.BitDepth,
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SampleRate: f.SampleRate,
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ChannelCount: f.ChannelCount,
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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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