mirror of
https://github.com/aler9/gortsplib
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a1396206b5
* split tracks from medias * move tracks into dedicated package * move media into dedicated package * edit Medias.Marshal() in order to return SDP * add medias.Find() and simplify examples * improve coverage * fix rebase errors * replace TrackIDs with MediaIDs * implement media-specific and track-specific callbacks for reading RTCP and RTP packets * rename publish into record, read into play * add v2 tag * rename tracks into formats
38 lines
810 B
Go
38 lines
810 B
Go
package rtplpcm
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import (
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"fmt"
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"time"
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"github.com/pion/rtp"
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"github.com/aler9/gortsplib/v2/pkg/rtptimedec"
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)
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// Decoder is a RTP/LPCM decoder.
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type Decoder struct {
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BitDepth int
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SampleRate int
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ChannelCount int
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timeDecoder *rtptimedec.Decoder
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sampleSize int
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}
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// Init initializes the decoder.
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func (d *Decoder) Init() {
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d.timeDecoder = rtptimedec.New(d.SampleRate)
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d.sampleSize = d.BitDepth * d.ChannelCount / 8
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}
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// Decode decodes audio samples from a RTP packet.
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// It returns audio samples and PTS of the first sample.
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func (d *Decoder) Decode(pkt *rtp.Packet) ([]byte, time.Duration, error) {
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plen := len(pkt.Payload)
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if (plen % d.sampleSize) != 0 {
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return nil, 0, fmt.Errorf("received payload of wrong size")
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}
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return pkt.Payload, d.timeDecoder.Decode(pkt.Timestamp), nil
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}
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