mirror of
https://github.com/aler9/rtsp-simple-server
synced 2025-10-14 11:53:54 +08:00
71 lines
1.6 KiB
Go
71 lines
1.6 KiB
Go
package message
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import (
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"fmt"
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"github.com/notedit/rtmp/format/flv/flvio"
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"github.com/aler9/rtsp-simple-server/internal/rtmp/chunk"
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"github.com/aler9/rtsp-simple-server/internal/rtmp/rawmessage"
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)
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// MsgVideo is a video message.
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type MsgVideo struct {
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ChunkStreamID byte
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DTS uint32
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MessageStreamID uint32
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IsKeyFrame bool
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H264Type uint8
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PTSDelta uint32
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Payload []byte
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}
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// Unmarshal implements Message.
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func (m *MsgVideo) Unmarshal(raw *rawmessage.Message) error {
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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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if len(raw.Body) < 5 {
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return fmt.Errorf("invalid body size")
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}
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m.IsKeyFrame = (raw.Body[0] >> 4) == flvio.FRAME_KEY
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codec := raw.Body[0] & 0x0F
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if codec != flvio.VIDEO_H264 {
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return fmt.Errorf("unsupported video codec: %d", codec)
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}
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m.H264Type = raw.Body[1]
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m.PTSDelta = uint32(raw.Body[2])<<16 | uint32(raw.Body[3])<<8 | uint32(raw.Body[4])
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m.Payload = raw.Body[5:]
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return nil
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}
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// Marshal implements Message.
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func (m MsgVideo) Marshal() (*rawmessage.Message, error) {
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body := make([]byte, 5+len(m.Payload))
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if m.IsKeyFrame {
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body[0] = flvio.FRAME_KEY << 4
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} else {
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body[0] = flvio.FRAME_INTER << 4
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}
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body[0] |= flvio.VIDEO_H264
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body[1] = m.H264Type
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body[2] = uint8(m.PTSDelta >> 16)
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body[3] = uint8(m.PTSDelta >> 8)
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body[4] = uint8(m.PTSDelta)
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copy(body[5:], m.Payload)
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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: chunk.MessageTypeVideo,
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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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