48 lines
1.1 KiB
Go
48 lines
1.1 KiB
Go
package formats
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import (
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"errors"
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"fmt"
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"github.com/bluenviron/gortsplib/v4"
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"github.com/bluenviron/gortsplib/v4/pkg/description"
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"github.com/bluenviron/gortsplib/v4/pkg/format"
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"github.com/bluenviron/gortsplib/v4/pkg/format/rtpsimpleaudio"
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"github.com/pion/rtp"
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)
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// FindOPUSFormat finds the OPUS media and format.
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func FindOPUSFormat(desc *description.Session) (*format.Opus, *description.Media, error) {
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var opusFormat *format.Opus
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opusMedia := desc.FindFormat(&opusFormat)
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if opusMedia == nil {
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return nil, nil, errors.New("media OPUS not found")
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}
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return opusFormat, opusMedia, nil
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}
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// ProcessOPUS processes OPUS flow and returns PTS and OP.
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func ProcessOPUS(
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c *gortsplib.Client,
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opusMedia *description.Media,
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opusRTPDec *rtpsimpleaudio.Decoder,
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pkt *rtp.Packet,
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) (
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int64,
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[]byte,
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error) {
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// Decode timestamp.
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pts, ok := c.PacketPTS2(opusMedia, pkt)
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if !ok {
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return 0, nil, fmt.Errorf("waiting for timestamp\n")
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}
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// Extract Opus packets from RTP packets.
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op, err := opusRTPDec.Decode(pkt)
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if err != nil {
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return 0, nil, fmt.Errorf("decoding RTP packet error: %w", err)
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}
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return pts, op, nil
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}
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