install go2rtc on bob

2026-04-04 19:36:14 +02:00
parent f0b56e63d1
commit ccf88187b8
537 changed files with 69213 additions and 0 deletions
@@ -0,0 +1,154 @@
+package aac
+
+import (
+	"encoding/binary"
+
+	"github.com/AlexxIT/go2rtc/pkg/core"
+	"github.com/pion/rtp"
+)
+
+const RTPPacketVersionAAC = 0
+
+func RTPDepay(handler core.HandlerFunc) core.HandlerFunc {
+	var timestamp uint32
+
+	return func(packet *rtp.Packet) {
+		// support ONLY 2 bytes header size!
+		// streamtype=5;profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=1408
+		// https://datatracker.ietf.org/doc/html/rfc3640
+		headersSize := binary.BigEndian.Uint16(packet.Payload) >> 3
+
+		//log.Printf("[RTP/AAC] units: %d, size: %4d, ts: %10d, %t", headersSize/2, len(packet.Payload), packet.Timestamp, packet.Marker)
+
+		if len(packet.Payload) < int(2+headersSize) {
+			// In very rare cases noname cameras may send data not according to the standard
+			// https://github.com/AlexxIT/go2rtc/issues/1328
+			if IsADTS(packet.Payload) {
+				clone := *packet
+				clone.Version = RTPPacketVersionAAC
+				clone.Timestamp = timestamp
+				clone.Payload = clone.Payload[ADTSHeaderSize:]
+				handler(&clone)
+			}
+			return
+		}
+
+		headers := packet.Payload[2 : 2+headersSize]
+		units := packet.Payload[2+headersSize:]
+
+		for len(headers) >= 2 {
+			unitSize := binary.BigEndian.Uint16(headers) >> 3
+
+			if len(units) < int(unitSize) {
+				return
+			}
+
+			unit := units[:unitSize]
+
+			headers = headers[2:]
+			units = units[unitSize:]
+
+			timestamp += AUTime
+
+			clone := *packet
+			clone.Version = RTPPacketVersionAAC
+			clone.Timestamp = timestamp
+			if IsADTS(unit) {
+				clone.Payload = unit[ADTSHeaderSize:]
+			} else {
+				clone.Payload = unit
+			}
+			handler(&clone)
+		}
+	}
+}
+
+func RTPPay(handler core.HandlerFunc) core.HandlerFunc {
+	var seq uint16
+	var ts uint32
+
+	return func(packet *rtp.Packet) {
+		if packet.Version != RTPPacketVersionAAC {
+			handler(packet)
+			return
+		}
+
+		// support ONLY one unit in payload
+		auSize := uint16(len(packet.Payload))
+		// 2 bytes header size + 2 bytes first payload size
+		payload := make([]byte, 2+2+auSize)
+		payload[1] = 16 // header size in bits
+		binary.BigEndian.PutUint16(payload[2:], auSize<<3)
+		copy(payload[4:], packet.Payload)
+
+		clone := rtp.Packet{
+			Header: rtp.Header{
+				Version:        2,
+				Marker:         true,
+				SequenceNumber: seq,
+				Timestamp:      ts,
+			},
+			Payload: payload,
+		}
+		handler(&clone)
+
+		seq++
+		ts += AUTime
+	}
+}
+
+func ADTStoRTP(src []byte) (dst []byte) {
+	dst = make([]byte, 2) // header bytes
+	for i, n := 0, len(src)-ADTSHeaderSize; i < n; {
+		auSize := ReadADTSSize(src[i:])
+		dst = append(dst, byte(auSize>>5), byte(auSize<<3)) // size in bits
+		i += int(auSize)
+	}
+	hdrSize := uint16(len(dst) - 2)
+	binary.BigEndian.PutUint16(dst, hdrSize<<3) // size in bits
+	return append(dst, src...)
+}
+
+func RTPTimeSize(b []byte) uint32 {
+	// convert RTP header size to units count
+	units := binary.BigEndian.Uint16(b) >> 4
+	return uint32(units) * AUTime
+}
+
+func RTPToADTS(codec *core.Codec, handler core.HandlerFunc) core.HandlerFunc {
+	adts := CodecToADTS(codec)
+
+	return func(packet *rtp.Packet) {
+		src := packet.Payload
+		dst := make([]byte, 0, len(src))
+
+		headersSize := binary.BigEndian.Uint16(src) >> 3
+		headers := src[2 : 2+headersSize]
+		units := src[2+headersSize:]
+
+		for len(headers) > 0 {
+			unitSize := binary.BigEndian.Uint16(headers) >> 3
+			headers = headers[2:]
+			unit := units[:unitSize]
+			units = units[unitSize:]
+
+			if !IsADTS(unit) {
+				i := len(dst)
+				dst = append(dst, adts...)
+				WriteADTSSize(dst[i:], ADTSHeaderSize+uint16(len(unit)))
+			}
+
+			dst = append(dst, unit...)
+		}
+
+		clone := *packet
+		clone.Version = RTPPacketVersionAAC
+		clone.Payload = dst
+		handler(&clone)
+	}
+}
+
+func RTPToCodec(b []byte) *core.Codec {
+	hdrSize := binary.BigEndian.Uint16(b) / 8
+	return ADTSToCodec(b[2+hdrSize:])
+}