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Removed used fields and initalize packets lazily.

This commit is contained in:
scruzin 2019-01-07 21:45:00 +10:30
parent 0b869523b4
commit 04679e4757
4 changed files with 78 additions and 116 deletions
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11
rtmp/packet.go
View File

@ -62,6 +62,12 @@ const (
RTMP_PACKET_SIZE_MINIMUM = 3
)
const (
RTMP_CHANNEL_BYTES_READ = 0x02
RTMP_CHANNEL_CONTROL = 0x03
RTMP_CHANNEL_SOURCE = 0x04
)
// packetSize defines valid packet sizes.
var packetSize = [...]int{12, 8, 4, 1}
@ -257,7 +263,7 @@ func resizePacket(pkt *packet, size uint32, ht uint8) {
}
// sendPacket sends a packet.
func sendPacket(s *Session, pkt *packet, queue int) error {
func sendPacket(s *Session, pkt *packet, queue bool) error {
var prevPkt *packet
var last int
@ -455,7 +461,6 @@ func sendPacket(s *Session, pkt *packet, queue int) error {
}
// We invoked a remote method
// TODO: port the const
if pkt.packetType == RTMP_PACKET_TYPE_INVOKE {
buf := pkt.body[1:]
meth := C_AMF_DecodeString(buf)
@ -464,7 +469,7 @@ func sendPacket(s *Session, pkt *packet, queue int) error {
log.Printf("invoking %v", meth)
}
// keep it in call queue till result arrives
if queue != 0 {
if queue {
buf = buf[3+len(meth):]
txn := int32(C_AMF_DecodeNumber(buf[:8]))
s.methodCalls = append(s.methodCalls, method{name: meth, num: txn})

106
rtmp/rtmp.go
View File

@ -166,7 +166,7 @@ func setupURL(s *Session, addr string) (err error) {
}
// connect establishes an RTMP connection.
func connect(s *Session, cp *packet) error {
func connect(s *Session) error {
addr, err := net.ResolveTCPAddr("tcp4", s.link.host+":"+strconv.Itoa(int(s.link.port)))
if err != nil {
return err
@ -178,7 +178,7 @@ func connect(s *Session, cp *packet) error {
if debugMode {
log.Println("... connected, handshaking...")
}
err = handshake(s, 1)
err = handshake(s)
if err != nil {
log.Println("connect: handshake failed")
return errHandshake
@ -186,7 +186,7 @@ func connect(s *Session, cp *packet) error {
if debugMode {
log.Println("... handshaked...")
}
err = sendConnectPacket(s, cp)
err = sendConnectPacket(s)
if err != nil {
log.Println("connect: sendConnect failed")
return errConnSend
@ -195,13 +195,9 @@ func connect(s *Session, cp *packet) error {
}
// connectStream reads a packet and handles it
func connectStream(s *Session, seekTime int32) error {
func connectStream(s *Session) error {
var pkt packet
if seekTime > 0 {
s.link.seekTime = seekTime
}
for !s.isPlaying && s.isConnected() {
err := readPacket(s, &pkt)
if err != nil {
@ -331,19 +327,12 @@ func writeN(s *Session, buf []byte) error {
return nil
}
func sendConnectPacket(s *Session, cp *packet) error {
if cp != nil {
return sendPacket(s, cp, 1)
}
func sendConnectPacket(s *Session) error {
var pbuf [4096]byte
pkt := packet{
channel: 0x03,
channel: RTMP_CHANNEL_CONTROL,
headerType: RTMP_PACKET_SIZE_LARGE,
packetType: RTMP_PACKET_TYPE_INVOKE,
timestamp: 0,
info: 0,
hasAbsTimestamp: false,
header: pbuf[:],
body: pbuf[RTMP_MAX_HEADER_SIZE:],
}
@ -454,18 +443,15 @@ func sendConnectPacket(s *Session, cp *packet) error {
pkt.bodySize = uint32((len(pbuf) - RTMP_MAX_HEADER_SIZE) - len(enc))
return sendPacket(s, &pkt, 1)
return sendPacket(s, &pkt, true)
}
func sendCreateStream(s *Session) error {
var pbuf [256]byte
pkt := packet{
channel: 0x03, /* control channel (invoke) */
channel: RTMP_CHANNEL_CONTROL,
headerType: RTMP_PACKET_SIZE_MEDIUM,
packetType: RTMP_PACKET_TYPE_INVOKE,
timestamp: 0,
info: 0,
hasAbsTimestamp: false,
header: pbuf[:],
body: pbuf[RTMP_MAX_HEADER_SIZE:],
}
@ -485,18 +471,15 @@ func sendCreateStream(s *Session) error {
pkt.bodySize = uint32((len(pbuf) - RTMP_MAX_HEADER_SIZE) - len(enc))
return sendPacket(s, &pkt, 1)
return sendPacket(s, &pkt, true)
}
func sendReleaseStream(s *Session) error {
var pbuf [1024]byte
pkt := packet{
channel: 0x03, /* control channel (invoke) */
channel: RTMP_CHANNEL_CONTROL,
headerType: RTMP_PACKET_SIZE_MEDIUM,
packetType: RTMP_PACKET_TYPE_INVOKE,
timestamp: 0,
info: 0,
hasAbsTimestamp: false,
header: pbuf[:],
body: pbuf[RTMP_MAX_HEADER_SIZE:],
}
@ -519,18 +502,15 @@ func sendReleaseStream(s *Session) error {
}
pkt.bodySize = uint32((len(pbuf) - RTMP_MAX_HEADER_SIZE) - len(enc))
return sendPacket(s, &pkt, 0)
return sendPacket(s, &pkt, false)
}
func sendFCPublish(s *Session) error {
var pbuf [1024]byte
pkt := packet{
channel: 0x03, /* control channel (invoke) */
channel: RTMP_CHANNEL_CONTROL,
headerType: RTMP_PACKET_SIZE_MEDIUM,
packetType: RTMP_PACKET_TYPE_INVOKE,
timestamp: 0,
info: 0,
hasAbsTimestamp: false,
header: pbuf[:],
body: pbuf[RTMP_MAX_HEADER_SIZE:],
}
@ -554,18 +534,15 @@ func sendFCPublish(s *Session) error {
pkt.bodySize = uint32((len(pbuf) - RTMP_MAX_HEADER_SIZE) - len(enc))
return sendPacket(s, &pkt, 0)
return sendPacket(s, &pkt, false)
}
func sendFCUnpublish(s *Session) error {
var pbuf [1024]byte
pkt := packet{
channel: 0x03, /* control channel (invoke) */
channel: RTMP_CHANNEL_CONTROL,
headerType: RTMP_PACKET_SIZE_MEDIUM,
packetType: RTMP_PACKET_TYPE_INVOKE,
timestamp: 0,
info: 0,
hasAbsTimestamp: false,
header: pbuf[:],
body: pbuf[RTMP_MAX_HEADER_SIZE:],
}
@ -589,18 +566,15 @@ func sendFCUnpublish(s *Session) error {
pkt.bodySize = uint32((len(pbuf) - RTMP_MAX_HEADER_SIZE) - len(enc))
return sendPacket(s, &pkt, 0)
return sendPacket(s, &pkt, false)
}
func sendPublish(s *Session) error {
var pbuf [1024]byte
pkt := packet{
channel: 0x04, /* source channel (invoke) */
channel: RTMP_CHANNEL_SOURCE,
headerType: RTMP_PACKET_SIZE_LARGE,
packetType: RTMP_PACKET_TYPE_INVOKE,
timestamp: 0,
info: s.streamID,
hasAbsTimestamp: false,
header: pbuf[:],
body: pbuf[RTMP_MAX_HEADER_SIZE:],
}
@ -628,18 +602,15 @@ func sendPublish(s *Session) error {
pkt.bodySize = uint32((len(pbuf) - RTMP_MAX_HEADER_SIZE) - len(enc))
return sendPacket(s, &pkt, 1)
return sendPacket(s, &pkt, true)
}
func sendDeleteStream(s *Session, dStreamId float64) error {
var pbuf [256]byte
pkt := packet{
channel: 0x03, /* control channel (invoke) */
channel: RTMP_CHANNEL_CONTROL,
headerType: RTMP_PACKET_SIZE_MEDIUM,
packetType: RTMP_PACKET_TYPE_INVOKE,
timestamp: 0,
info: 0,
hasAbsTimestamp: false,
header: pbuf[:],
body: pbuf[RTMP_MAX_HEADER_SIZE:],
}
@ -663,19 +634,16 @@ func sendDeleteStream(s *Session, dStreamId float64) error {
pkt.bodySize = uint32((len(pbuf) - RTMP_MAX_HEADER_SIZE) - len(enc))
/* no response expected */
return sendPacket(s, &pkt, 0)
return sendPacket(s, &pkt, false)
}
// sendBytesReceived tells the server how many bytes the client has received.
func sendBytesReceived(s *Session) error {
var pbuf [256]byte
pkt := packet{
channel: 0x02, /* control channel (invoke) */
channel: RTMP_CHANNEL_BYTES_READ,
headerType: RTMP_PACKET_SIZE_MEDIUM,
packetType: RTMP_PACKET_TYPE_BYTES_READ_REPORT,
timestamp: 0,
info: 0,
hasAbsTimestamp: false,
header: pbuf[:],
body: pbuf[RTMP_MAX_HEADER_SIZE:],
}
@ -688,18 +656,15 @@ func sendBytesReceived(s *Session) error {
}
pkt.bodySize = 4
return sendPacket(s, &pkt, 0)
return sendPacket(s, &pkt, false)
}
func sendCheckBW(s *Session) error {
var pbuf [256]byte
pkt := packet{
channel: 0x03, /* control channel (invoke) */
channel: RTMP_CHANNEL_CONTROL,
headerType: RTMP_PACKET_SIZE_LARGE,
packetType: RTMP_PACKET_TYPE_INVOKE,
timestamp: 0,
info: 0,
hasAbsTimestamp: false,
header: pbuf[:],
body: pbuf[RTMP_MAX_HEADER_SIZE:],
}
@ -719,7 +684,7 @@ func sendCheckBW(s *Session) error {
pkt.bodySize = uint32((len(pbuf) - RTMP_MAX_HEADER_SIZE) - len(enc))
return sendPacket(s, &pkt, 0)
return sendPacket(s, &pkt, false)
}
func eraseMethod(m []method, i int) []method {
@ -740,9 +705,6 @@ func handleInvoke(s *Session, body []byte) error {
return errDecoding
}
// NOTE we don't really need this ?? still functions without it
//C.AMF_Dump(&obj)
//C.AMFProp_GetString(C_AMF_GetProp(&obj, nil, 0), &method)
meth := C_AMFProp_GetString(C_AMF_GetProp(&obj, "", 0))
txn := C_AMFProp_GetNumber(C_AMF_GetProp(&obj, "", 1))
// TODO use new logger here
@ -865,18 +827,15 @@ func handleInvoke(s *Session, body []byte) error {
}
leave:
C_AMF_Reset(&obj)
// None of the methods we implement will result in a true return.
return nil
}
func handshake(s *Session, FP9HandShake int32) error {
func handshake(s *Session) error {
var clientbuf [RTMP_SIG_SIZE + 1]byte
clientsig := clientbuf[1:]
var serversig [RTMP_SIG_SIZE]byte
clientbuf[0] = 0x03 // not encrypted
clientbuf[0] = RTMP_CHANNEL_CONTROL
binary.BigEndian.PutUint32(clientsig, uint32(time.Now().UnixNano()/1000000))
copy(clientsig[4:8], []byte{0, 0, 0, 0})
@ -934,16 +893,15 @@ func handshake(s *Session, FP9HandShake int32) error {
// write prepares data to write then sends it.
func (s *Session) write(buf []byte) error {
var pkt packet
pkt := packet{
channel: RTMP_CHANNEL_SOURCE,
info: s.streamID,
}
var enc []byte
size := len(buf)
var num int
pkt.channel = 0x04
pkt.info = s.streamID
for len(buf) != 0 {
if pkt.bytesRead == 0 {
if size < minDataSize {
if len(buf) < minDataSize {
return errTinyPacket
}
@ -985,7 +943,7 @@ func (s *Session) write(buf []byte) error {
} else {
enc = pkt.body[:pkt.bodySize][pkt.bytesRead:]
}
num = int(pkt.bodySize - pkt.bytesRead)
num := int(pkt.bodySize - pkt.bytesRead)
if num > len(buf) {
num = len(buf)
}
@ -994,7 +952,7 @@ func (s *Session) write(buf []byte) error {
pkt.bytesRead += uint32(num)
buf = buf[num:]
if pkt.bytesRead == pkt.bodySize {
err := sendPacket(s, &pkt, 0)
err := sendPacket(s, &pkt, false)
pkt.body = nil
pkt.bytesRead = 0
if err != nil {

1
rtmp/rtmp_headers.go
View File

@ -105,7 +105,6 @@ type link struct {
flashVer string
token string
extras C_AMFObject
seekTime int32
lFlags int32
swfAge int32
protocol int32

4
rtmp/session.go
View File

@ -96,13 +96,13 @@ func (s *Session) start() error {
}
s.enableWrite()
err = connect(s, nil)
err = connect(s)
if err != nil {
s.close()
return err
}
err = connectStream(s, 0)
err = connectStream(s)
if err != nil {
s.close()
return err