mirror of
https://github.com/aler9/rtsp-simple-server
synced 2025-10-27 17:51:01 +08:00
83 lines
2.0 KiB
Go
83 lines
2.0 KiB
Go
package message
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import (
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"fmt"
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"time"
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"github.com/bluenviron/mediamtx/internal/protocols/rtmp/rawmessage"
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)
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// VideoExCodedFrames is a CodedFrames extended message.
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type VideoExCodedFrames struct {
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ChunkStreamID byte
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DTS time.Duration
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MessageStreamID uint32
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FourCC FourCC
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PTSDelta time.Duration
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Payload []byte
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}
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func (m *VideoExCodedFrames) unmarshal(raw *rawmessage.Message) error {
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if len(raw.Body) < 5 {
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return fmt.Errorf("not enough bytes")
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}
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m.ChunkStreamID = raw.ChunkStreamID
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m.DTS = raw.Timestamp
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m.MessageStreamID = raw.MessageStreamID
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m.FourCC = FourCC(raw.Body[1])<<24 | FourCC(raw.Body[2])<<16 | FourCC(raw.Body[3])<<8 | FourCC(raw.Body[4])
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switch m.FourCC {
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case FourCCAVC, FourCCHEVC:
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if len(raw.Body) < 8 {
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return fmt.Errorf("not enough bytes")
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}
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m.PTSDelta = time.Duration(uint32(raw.Body[5])<<16|uint32(raw.Body[6])<<8|uint32(raw.Body[7])) * time.Millisecond
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m.Payload = raw.Body[8:]
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case FourCCAV1, FourCCVP9:
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m.Payload = raw.Body[5:]
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default:
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return fmt.Errorf("unsupported fourCC: %v", m.FourCC)
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}
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return nil
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}
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func (m VideoExCodedFrames) marshalBodySize() int {
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switch m.FourCC {
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case FourCCAVC, FourCCHEVC:
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return 8 + len(m.Payload)
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}
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return 5 + len(m.Payload)
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}
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func (m VideoExCodedFrames) marshal() (*rawmessage.Message, error) {
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body := make([]byte, m.marshalBodySize())
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body[0] = 0b10000000 | byte(VideoExTypeCodedFrames)
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body[1] = uint8(m.FourCC >> 24)
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body[2] = uint8(m.FourCC >> 16)
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body[3] = uint8(m.FourCC >> 8)
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body[4] = uint8(m.FourCC)
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if m.FourCC == FourCCHEVC {
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tmp := uint32(m.PTSDelta / time.Millisecond)
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body[5] = uint8(tmp >> 16)
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body[6] = uint8(tmp >> 8)
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body[7] = uint8(tmp)
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copy(body[8:], m.Payload)
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} else {
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copy(body[5:], m.Payload)
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}
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return &rawmessage.Message{
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ChunkStreamID: m.ChunkStreamID,
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Timestamp: m.DTS,
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Type: uint8(TypeVideo),
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MessageStreamID: m.MessageStreamID,
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Body: body,
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}, nil
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}
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