Alexey Khit
120 lines
2.9 KiB
Go
120 lines
2.9 KiB
Go
package h265
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import (
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"encoding/binary"
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"github.com/AlexxIT/go2rtc/pkg/h264"
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"github.com/AlexxIT/go2rtc/pkg/streamer"
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"github.com/deepch/vdk/codec/h265parser"
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"github.com/pion/rtp"
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)
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func RTPDepay(track *streamer.Track) streamer.WrapperFunc {
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var buffer []byte
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return func(push streamer.WriterFunc) streamer.WriterFunc {
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return func(packet *rtp.Packet) error {
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naluType := (packet.Payload[0] >> 1) & 0x3f
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//fmt.Printf(
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// "[RTP] codec: %s, nalu: %2d, size: %6d, ts: %10d, pt: %2d, ssrc: %d, seq: %d\n",
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// track.Codec.Name, naluType, len(packet.Payload), packet.Timestamp,
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// packet.PayloadType, packet.SSRC, packet.SequenceNumber,
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//)
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switch naluType {
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case h265parser.NAL_UNIT_UNSPECIFIED_49:
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data := packet.Payload
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switch data[2] >> 6 {
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case 2: // begin
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buffer = []byte{
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(data[0] & 0x81) | (data[2] & 0x3f << 1), data[1],
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}
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buffer = append(buffer, data[3:]...)
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return nil
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case 0: // continue
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buffer = append(buffer, data[3:]...)
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return nil
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case 1: // end
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packet.Payload = append(buffer, data[3:]...)
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}
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default:
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//panic("not implemented")
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}
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size := make([]byte, 4)
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binary.BigEndian.PutUint32(size, uint32(len(packet.Payload)))
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clone := *packet
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clone.Version = h264.RTPPacketVersionAVC
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clone.Payload = append(size, packet.Payload...)
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return push(&clone)
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}
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}
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}
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// SafariPay - generate Safari friendly payload for H265
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func SafariPay(mtu uint16) streamer.WrapperFunc {
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sequencer := rtp.NewRandomSequencer()
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size := int(mtu - 12) // rtp.Header size
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var buffer []byte
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return func(push streamer.WriterFunc) streamer.WriterFunc {
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return func(packet *rtp.Packet) error {
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if packet.Version != h264.RTPPacketVersionAVC {
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return push(packet)
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}
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data := packet.Payload
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data[0] = 0
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data[1] = 0
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data[2] = 0
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data[3] = 1
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var start byte
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nut := (data[4] >> 1) & 0b111111
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switch nut {
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case h265parser.NAL_UNIT_VPS, h265parser.NAL_UNIT_SPS, h265parser.NAL_UNIT_PPS:
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buffer = append(buffer, data...)
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return nil
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case h265parser.NAL_UNIT_CODED_SLICE_IDR_W_RADL:
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buffer = append([]byte{3}, buffer...)
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data = append(buffer, data...)
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start = 1
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default:
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data = append([]byte{2}, data...)
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start = 0
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}
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for len(data) > size {
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clone := rtp.Packet{
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Header: rtp.Header{
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Version: 2,
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Marker: false,
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SequenceNumber: sequencer.NextSequenceNumber(),
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Timestamp: packet.Timestamp,
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},
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Payload: data[:size],
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}
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if err := push(&clone); err != nil {
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return err
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}
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data = append([]byte{start}, data[size:]...)
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}
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clone := rtp.Packet{
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Header: rtp.Header{
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Version: 2,
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Marker: true,
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SequenceNumber: sequencer.NextSequenceNumber(),
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Timestamp: packet.Timestamp,
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},
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Payload: data,
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}
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return push(&clone)
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}
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}
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}
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