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42 lines
1.2 KiB
Go
42 lines
1.2 KiB
Go
package stream
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import (
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"encoding/binary"
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"github.com/lkmio/avformat"
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"github.com/lkmio/avformat/collections"
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"github.com/lkmio/lkm/log"
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)
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type RtpStream struct {
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BaseTransStream
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rtpBuffer *RtpBuffer
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}
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func (f *RtpStream) Input(packet *avformat.AVPacket, _ int) ([]*collections.ReferenceCounter[[]byte], int64, bool, error) {
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size := 2 + uint16(len(packet.Data))
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if size > UDPReceiveBufferSize {
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log.Sugar.Errorf("转发%s流失败 rtp包过长, 长度：%d, 最大允许：%d", f.Protocol, len(packet.Data), UDPReceiveBufferSize)
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return nil, 0, false, nil
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}
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counter := f.rtpBuffer.Get()
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bytes := counter.Get()
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binary.BigEndian.PutUint16(bytes, size-2)
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copy(bytes[2:], packet.Data)
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counter.ResetData(bytes[:size])
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// 每帧都当关键帧, 直接发给上级
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return []*collections.ReferenceCounter[[]byte]{counter}, -1, true, nil
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}
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func NewRtpTransStream(protocol TransStreamProtocol, capacity int) *RtpStream {
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return &RtpStream{
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BaseTransStream: BaseTransStream{Protocol: protocol},
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rtpBuffer: NewRtpBuffer(capacity),
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}
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}
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func GBCascadedTransStreamFactory(_ Source, _ TransStreamProtocol, _ []*Track, _ Sink) (TransStream, error) {
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return NewRtpTransStream(TransStreamGBCascaded, 1024), nil
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}
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