second

client.go

@@ -3,22 +3,26 @@ package rtsp
 import (
 	"fmt"
 	"net"
+	"bytes"
 	"io"
-	"io/ioutil"
 	"strings"
 	"strconv"
 	"bufio"
 	"net/textproto"
 	"net/url"
 	"encoding/hex"
+	"encoding/binary"
 	"crypto/md5"
 	"github.com/nareix/av"
+	"github.com/nareix/codec/h264parser"
+	"github.com/nareix/rtsp/sdp"
 )
 
 type Client struct {
 	DebugConn bool
 	url *url.URL
 	conn net.Conn
+	rconn io.Reader
 	requestUri string
 	cseq uint
 	streams []*Stream
@@ -27,6 +31,23 @@ type Client struct {
 	body io.Reader
 }
 
+type Request struct {
+	Header []string
+	Uri string
+	Method string
+}
+
+type Response struct {
+	BlockLength int
+	Block []byte
+	BlockNo int
+
+	StatusCode int
+	Header textproto.MIMEHeader
+	ContentLength int
+	Body []byte
+}
+
 func Connect(uri string) (self *Client, err error) {
 	var URL *url.URL
 	if URL, err = url.Parse(uri); err != nil {
@@ -44,6 +65,7 @@ func Connect(uri string) (self *Client, err error) {
 
 	self = &Client{
 		conn: conn,
+		rconn: conn,
 		url: URL,
 		requestUri: u2.String(),
 	}
@@ -52,20 +74,20 @@ func Connect(uri string) (self *Client, err error) {
 
 func (self *Client) writeLine(line string) (err error) {
 	if self.DebugConn {
-		fmt.Print(line)
+		fmt.Print("> ", line)
 	}
 	_, err = fmt.Fprint(self.conn, line)
 	return
 }
 
-func (self *Client) WriteRequest(method string, uri string, headers []string) (err error) {
+func (self *Client) WriteRequest(req Request) (err error) {
 	self.cseq++
-	headers = append(headers, fmt.Sprintf("CSeq: %d", self.cseq))
+	req.Header = append(req.Header, fmt.Sprintf("CSeq: %d", self.cseq))
-	if err = self.writeLine(fmt.Sprintf("%s %s RTSP/1.0\r\n", method, uri)); err != nil {
+	if err = self.writeLine(fmt.Sprintf("%s %s RTSP/1.0\r\n", req.Method, req.Uri)); err != nil {
 		return
 	}
-	for _, header := range headers {
+	for _, v := range req.Header {
-		if err = self.writeLine(header+"\r\n"); err != nil {
+		if err = self.writeLine(fmt.Sprint(v, "\r\n")); err != nil {
 			return
 		}
 	}
@@ -75,8 +97,50 @@ func (self *Client) WriteRequest(method string, uri string, headers []string) (e
 	return
 }
 
-func (self *Client) ReadResponse() (statusCode int, body io.Reader, err error) {
+func (self *Client) ReadResponse() (res Response, err error) {
-	br := bufio.NewReader(self.conn)
+	var br *bufio.Reader
+
+	defer func() {
+		if br != nil {
+			buf, _ := br.Peek(br.Buffered())
+			self.rconn = io.MultiReader(bytes.NewReader(buf), self.rconn)
+		}
+		if res.StatusCode == 200 {
+			if res.ContentLength > 0 {
+				res.Body = make([]byte, res.ContentLength)
+				if _, err = io.ReadFull(self.rconn, res.Body); err != nil {
+					return
+				}
+			}
+		} else if res.BlockLength > 0 {
+			res.Block = make([]byte, res.BlockLength)
+			if _, err = io.ReadFull(self.rconn, res.Block); err != nil {
+				return
+			}
+		}
+	}()
+
+	var h [4]byte
+	if _, err = io.ReadFull(self.rconn, h[:]); err != nil {
+		return
+	}
+	if h[0] == 36 {
+		// $
+		res.BlockLength = int(h[2])<<8+int(h[3])
+		res.BlockNo = int(h[1])
+		if self.DebugConn {
+			fmt.Println("block: len", res.BlockLength, "no", res.BlockNo)
+		}
+		return
+	} else if h[0] == 82 {
+		// RTSP 200 OK
+		self.rconn = io.MultiReader(bytes.NewReader(h[:]), self.rconn)
+	} else {
+		err = fmt.Errorf("invalid response bytes=%v", h)
+		return
+	}
+
+	br = bufio.NewReader(self.rconn)
 	tp := textproto.NewReader(br)
 
 	var line string
@@ -84,29 +148,33 @@ func (self *Client) ReadResponse() (statusCode int, body io.Reader, err error) {
 		return
 	}
 	if self.DebugConn {
-		fmt.Println(line)
+		fmt.Println("<", line)
 	}
 
 	fline := strings.SplitN(line, " ", 3)
 	if len(fline) < 2 {
-		err = fmt.Errorf("malformed RTSP response")
+		err = fmt.Errorf("malformed RTSP response line")
 		return
 	}
 
-	if statusCode, err = strconv.Atoi(fline[1]); err != nil {
+	if res.StatusCode, err = strconv.Atoi(fline[1]); err != nil {
 		return
 	}
-	if statusCode != 200 && statusCode != 401 {
-		err = fmt.Errorf("statusCode(%d) invalid", statusCode)
-		return
-	}
-
 	var header textproto.MIMEHeader
 	if header, err = tp.ReadMIMEHeader(); err != nil {
 		return
 	}
 
-	if statusCode == 401 {
+	if self.DebugConn {
+		fmt.Println("<", header)
+	}
+
+	if res.StatusCode != 200 && res.StatusCode != 401 {
+		err = fmt.Errorf("StatusCode=%d invalid", res.StatusCode)
+		return
+	}
+
+	if res.StatusCode == 401 {
 		/*
 		RTSP/1.0 401 Unauthorized
 		CSeq: 2
@@ -149,7 +217,7 @@ func (self *Client) ReadResponse() (statusCode int, body io.Reader, err error) {
 				hs2 := md5hash("DESCRIBE:"+self.requestUri)
 				response := md5hash(hs1+":"+nonce+":"+hs2)
 				self.authorization = fmt.Sprintf(
-						`Authorization: Digest username="%s", realm="%s", nonce="%s", uri="%s", response="%s"`,
+						`Digest username="%s", realm="%s", nonce="%s", uri="%s", response="%s"`,
 						username, realm, nonce, self.requestUri, response)
 			}
 		}
@@ -161,29 +229,25 @@ func (self *Client) ReadResponse() (statusCode int, body io.Reader, err error) {
 		}
 	}
 
-	clen, _ := strconv.Atoi(header.Get("Content-Length"))
+	res.ContentLength, _ = strconv.Atoi(header.Get("Content-Length"))
-
-	if statusCode == 200 {
-		if clen > 0 {
-			body = io.LimitReader(br, int64(clen))
-		} else {
-			body = io.MultiReader(io.LimitReader(br, int64(br.Buffered())), self.conn)
-		}
-	}
 
 	return
 }
 
 func (self *Client) Setup(streams []int) (err error) {
 	for _, si := range streams {
-		reqhdr := []string{fmt.Sprintf("Transport: RTP/AVP/TCP;unicast;interleaved=%d-%d", si*2, si*2+1)}
+		req := Request{
-		if self.session != "" {
+			Method: "SETUP",
-			reqhdr = append(reqhdr, "Session: "+self.session)
+			Uri: self.requestUri+"/"+self.streams[si].Sdp.Control,
 		}
-		if err = self.WriteRequest("SETUP", self.requestUri+"/"+self.streams[si].control, reqhdr); err != nil {
+		req.Header = append(req.Header, fmt.Sprintf("Transport: RTP/AVP/TCP;unicast;interleaved=%d-%d", si*2, si*2+1))
+		if self.session != "" {
+			req.Header = append(req.Header, "Session: "+self.session)
+		}
+		if err = self.WriteRequest(req); err != nil {
 			return
 		}
-		if _, _, err = self.ReadResponse(); err != nil {
+		if _, err = self.ReadResponse(); err != nil {
 			return
 		}
 	}
@@ -195,124 +259,356 @@ func md5hash(s string) string {
 	return hex.EncodeToString(h[:])
 }
 
-func (self *Client) Describe() (streams []*Stream, err error) {
+func (self *Client) Describe() (streams []av.Stream, err error) {
-	var body io.Reader
+	var res Response
-	var statusCode int
 
 	for i := 0; i < 2; i++ {
-		reqhdr := []string{}
+		req := Request{
+			Method: "DESCRIBE",
+			Uri: self.requestUri,
+		}
 		if self.authorization != "" {
-			reqhdr = append(reqhdr, self.authorization)
+			req.Header = append(req.Header, "Authorization: "+self.authorization)
 		}
-		if err = self.WriteRequest("DESCRIBE", self.requestUri, reqhdr); err != nil {
+		if err = self.WriteRequest(req); err != nil {
 			return
 		}
-		if statusCode, body, err = self.ReadResponse(); err != nil {
+		if res, err = self.ReadResponse(); err != nil {
 			return
 		}
-		if statusCode == 200 {
+		if res.StatusCode == 200 {
 			break
 		}
 	}
-	if body == nil {
+	if res.ContentLength == 0 {
 		err = fmt.Errorf("Describe failed")
 		return
 	}
 
-	br := bufio.NewReader(body)
+	body := string(res.Body)
-	tp := textproto.NewReader(br)
-	var stream *Stream
 
-	for {
+	if self.DebugConn {
-		line, err := tp.ReadLine()
+		fmt.Println("<", body)
-		if err != nil {
+	}
-			break
-		}
 
-		if self.DebugConn {
+	self.streams = []*Stream{}
-			fmt.Println(line)
+	for _, info := range sdp.Decode(body) {
-		}
+		stream := &Stream{Sdp: info}
+		stream.SetType(info.Type)
 
-		typeval := strings.SplitN(line, "=", 2)
+		switch info.Type {
-		if len(typeval) == 2 {
+		case av.H264:
-			fields := strings.Split(typeval[1], " ")
+			var sps, pps []byte
-			switch typeval[0] {
+			for _, nalu := range info.SpropParameterSets {
-			case "m":
+				if len(nalu) > 0 {
-				if len(fields) > 0 {
+					switch nalu[0]&0x1f {
-					switch fields[0] {
+					case 7:
-					case "audio", "video":
+						sps = nalu
-						stream = &Stream{typestr: fields[0]}
+					case 8:
-						self.streams = append(self.streams, stream)
+						pps = nalu
-					}
-				}
-
-			case "a":
-				if stream != nil {
-					for _, field := range fields {
-						keyval := strings.Split(field, ":")
-						if len(keyval) >= 2 {
-							key := keyval[0]
-							val := keyval[1]
-							if key == "control" {
-								stream.control = val
-							}
-						}
 					}
 				}
 			}
+			if len(sps) > 0 && len(pps) > 0 {
+				codecData, _ := h264parser.CreateCodecDataBySPSAndPPS(sps, pps)
+				if err = stream.SetCodecData(codecData); err != nil {
+					err = fmt.Errorf("h264 sps/pps invalid: %s", err)
+					return
+				}
+			} else {
+				err = fmt.Errorf("h264 sdp sprop-parameter-sets invalid: missing sps or pps")
+				return
+			}
+
+		case av.AAC:
+			if len(info.Config) == 0 {
+				err = fmt.Errorf("aac sdp config missing")
+				return
+			}
+			if err = stream.SetCodecData(info.Config); err != nil {
+				err = fmt.Errorf("aac sdp config invalid: %s", err)
+				return
+			}
 		}
+
+		self.streams = append(self.streams, stream)
 	}
 
-	streams = self.streams
+	for _, stream := range self.streams {
+		streams = append(streams, stream)
+	}
 	return
 }
 
 func (self *Client) Options() (err error) {
-	if err = self.WriteRequest("OPTIONS", self.requestUri, []string{}); err != nil {
+	if err = self.WriteRequest(Request{
+		Method: "OPTIONS",
+		Uri: self.requestUri,
+	}); err != nil {
 		return
 	}
-	if _, _, err = self.ReadResponse(); err != nil {
+	if _, err = self.ReadResponse(); err != nil {
 		return
 	}
 	return
 }
 
-func (self *Client) readBlock() (err error) {
+func (self *Stream) handleH264Payload(naluType byte, timestamp uint32, packet []byte) (err error) {
-	var h [4]byte
+	/*
-	for {
+	Table 7-1 – NAL unit type codes
-		if _, err = io.ReadFull(self.body, h[:]); err != nil {
+	1   Coded slice of a non-IDR picture
-			return
+	5    Coded slice of an IDR picture
-		}
+	6    Supplemental enhancement information (SEI)
-		if h[0] != 36 {
+	7    Sequence parameter set
-			err = fmt.Errorf("block not start with $")
+	8    Picture parameter set
-			fmt.Println(h)
+	*/
-			return
+	switch naluType {
-		}
+	case 7,8:
-		length := int(h[2])<<8+int(h[3])
+		// sps/pps
 
-		if self.DebugConn {
+	default:
-			fmt.Println("packet", length, h[1])
+		if naluType == 5 {
-		}
+			self.pkt.IsKeyFrame = true
-
-		if _, err = io.CopyN(ioutil.Discard, self.body, int64(length)); err != nil {
-			return
 		}
+		self.gotpkt = true
+		self.pkt.Data = packet
 	}
+
+	return
 }
 
-func (self *Client) ReadHeader() (streams []av.Stream, err error) {
+func (self *Stream) handlePacket(timestamp uint32, packet []byte) (err error) {
-	if err = self.WriteRequest("PLAY", self.requestUri, []string{"Session: "+self.session}); err != nil {
+	switch self.Type() {
-		return
+	case av.AAC:
-	}
-	if _, self.body, err = self.ReadResponse(); err != nil {
-		return
-	}
 
-	for {
+	case av.H264:
-		if err = self.readBlock(); err != nil {
+		/*
+		+---------------+
+		|0|1|2|3|4|5|6|7|
+		+-+-+-+-+-+-+-+-+
+		|F|NRI|  Type   |
+		+---------------+
+		*/
+		naluType := packet[0]&0x1f
+
+		/*
+		NAL Unit  Packet    Packet Type Name               Section
+		Type      Type
+		-------------------------------------------------------------
+		0        reserved                                     -
+		1-23     NAL unit  Single NAL unit packet             5.6
+		24       STAP-A    Single-time aggregation packet     5.7.1
+		25       STAP-B    Single-time aggregation packet     5.7.1
+		26       MTAP16    Multi-time aggregation packet      5.7.2
+		27       MTAP24    Multi-time aggregation packet      5.7.2
+		28       FU-A      Fragmentation unit                 5.8
+		29       FU-B      Fragmentation unit                 5.8
+		30-31    reserved                                     -
+		*/
+
+		switch {
+		case naluType >= 1 && naluType <= 23:
+			if err = self.handleH264Payload(naluType, timestamp, packet); err != nil {
+				return
+			}
+
+		case naluType == 28:
+			/*
+			0                   1                   2                   3
+			0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+			+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+			| FU indicator  |   FU header   |                               |
+			+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+                               |
+			|                                                               |
+			|                         FU payload                            |
+			|                                                               |
+			|                               +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+			|                               :...OPTIONAL RTP padding        |
+			+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+			Figure 14.  RTP payload format for FU-A
+
+			The FU indicator octet has the following format:
+			+---------------+
+			|0|1|2|3|4|5|6|7|
+			+-+-+-+-+-+-+-+-+
+			|F|NRI|  Type   |
+			+---------------+
+
+
+			The FU header has the following format:
+			+---------------+
+			|0|1|2|3|4|5|6|7|
+			+-+-+-+-+-+-+-+-+
+			|S|E|R|  Type   |
+			+---------------+
+
+			S: 1 bit
+			When set to one, the Start bit indicates the start of a fragmented
+			NAL unit.  When the following FU payload is not the start of a
+			fragmented NAL unit payload, the Start bit is set to zero.
+
+			E: 1 bit
+			When set to one, the End bit indicates the end of a fragmented NAL
+			unit, i.e., the last byte of the payload is also the last byte of
+			the fragmented NAL unit.  When the following FU payload is not the
+			last fragment of a fragmented NAL unit, the End bit is set to
+			zero.
+
+			R: 1 bit
+			The Reserved bit MUST be equal to 0 and MUST be ignored by the
+			receiver.
+
+			Type: 5 bits
+			The NAL unit payload type as defined in table 7-1 of [1].
+			*/
+			fuIndicator := packet[0]
+			fuHeader := packet[1]
+			isStart := fuHeader&0x80!=0
+			isEnd := fuHeader&0x40!=0
+			naluType := fuHeader&0x1f
+			if isStart {
+				self.fuBuffer = []byte{fuIndicator&0xe0|fuHeader&0x1f}
+			}
+			self.fuBuffer = append(self.fuBuffer, packet[2:]...)
+			if isEnd {
+				if err = self.handleH264Payload(naluType, timestamp, self.fuBuffer); err != nil {
+					return
+				}
+			}
+
+		default:
+			err = fmt.Errorf("unsupported H264 naluType=%d", naluType)
 			return
 		}
 	}
 	return
 }
 
+func (self *Client) parseBlock(blockNo int, packet []byte) (streamIndex int, err error) {
+	if blockNo % 2 != 0 {
+		// rtcp block
+		return
+	}
+
+	/*
+	0                   1                   2                   3
+	0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	|V=2|P|X|  CC   |M|     PT      |       sequence number         |
+	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	|                           timestamp                           |
+	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	|           synchronization source (SSRC) identifier            |
+	+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
+	|            contributing source (CSRC) identifiers             |
+	|                             ....                              |
+	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	*/
+
+	if len(packet) < 8 {
+		err = fmt.Errorf("rtp packet too short")
+		return
+	}
+	payloadOffset := 12+int(packet[0]&0xf)*4
+	if payloadOffset+2 > len(packet) {
+		err = fmt.Errorf("rtp packet too short")
+		return
+	}
+
+	timestamp := binary.BigEndian.Uint32(packet[4:8])
+	payload := packet[payloadOffset:]
+
+	/*
+	PT 	Encoding Name 	Audio/Video (A/V) 	Clock Rate (Hz) 	Channels 	Reference 
+	0	PCMU	A	8000	1	[RFC3551]
+	1	Reserved				
+	2	Reserved				
+	3	GSM	A	8000	1	[RFC3551]
+	4	G723	A	8000	1	[Vineet_Kumar][RFC3551]
+	5	DVI4	A	8000	1	[RFC3551]
+	6	DVI4	A	16000	1	[RFC3551]
+	7	LPC	A	8000	1	[RFC3551]
+	8	PCMA	A	8000	1	[RFC3551]
+	9	G722	A	8000	1	[RFC3551]
+	10	L16	A	44100	2	[RFC3551]
+	11	L16	A	44100	1	[RFC3551]
+	12	QCELP	A	8000	1	[RFC3551]
+	13	CN	A	8000	1	[RFC3389]
+	14	MPA	A	90000		[RFC3551][RFC2250]
+	15	G728	A	8000	1	[RFC3551]
+	16	DVI4	A	11025	1	[Joseph_Di_Pol]
+	17	DVI4	A	22050	1	[Joseph_Di_Pol]
+	18	G729	A	8000	1	[RFC3551]
+	19	Reserved	A			
+	20	Unassigned	A			
+	21	Unassigned	A			
+	22	Unassigned	A			
+	23	Unassigned	A			
+	24	Unassigned	V			
+	25	CelB	V	90000		[RFC2029]
+	26	JPEG	V	90000		[RFC2435]
+	27	Unassigned	V			
+	28	nv	V	90000		[RFC3551]
+	29	Unassigned	V			
+	30	Unassigned	V			
+	31	H261	V	90000		[RFC4587]
+	32	MPV	V	90000		[RFC2250]
+	33	MP2T	AV	90000		[RFC2250]
+	34	H263	V	90000		[Chunrong_Zhu]
+	35-71	Unassigned	?			
+	72-76	Reserved for RTCP conflict avoidance				[RFC3551]
+	77-95	Unassigned	?			
+	96-127	dynamic	?			[RFC3551]
+	*/
+	//payloadType := packet[1]&0x7f
+
+	streamIndex = blockNo/2
+	stream := self.streams[streamIndex]
+
+	if self.DebugConn {
+		//fmt.Println("packet:", stream.Type(), "offset", payloadOffset, "pt", payloadType)
+		if len(packet)>24 {
+			fmt.Println(hex.Dump(packet[:24]))
+		}
+	}
+
+	if err = stream.handlePacket(timestamp, payload); err != nil {
+		return
+	}
+
+	return
+}
+
+func (self *Client) Play() (err error) {
+	req := Request{
+		Method: "PLAY",
+		Uri: self.requestUri,
+	}
+	req.Header = append(req.Header, "Session: "+self.session)
+	if err = self.WriteRequest(req); err != nil {
+		return
+	}
+	return
+}
+
+func (self *Client) ReadPacket() (streamIndex int, pkt av.Packet, err error) {
+	for {
+		var res Response
+		if res, err = self.ReadResponse(); err != nil {
+			return
+		}
+		if res.BlockLength > 0 {
+			if streamIndex, err = self.parseBlock(res.BlockNo, res.Block); err != nil {
+				return
+			}
+			stream := self.streams[streamIndex]
+			if stream.gotpkt {
+				pkt = stream.pkt
+				stream.gotpkt = false
+				return
+			}
+		}
+	}
+	return
+}
+

sdp/parser.go

@@ -0,0 +1,94 @@
+package sdp
+
+import (
+	"strings"
+	"strconv"
+	"encoding/hex"
+	"encoding/base64"
+	"github.com/nareix/av"
+)
+
+type Info struct {
+	AVType string
+	Type av.CodecType
+	TimeScale int
+	Control string
+	Rtpmap int
+	Config []byte
+	SpropParameterSets [][]byte
+}
+
+func Decode(content string) (infos []Info) {
+	var info *Info
+
+	for _, line := range strings.Split(content, "\n") {
+		line = strings.Trim(line, "\r")
+		typeval := strings.SplitN(line, "=", 2)
+		if len(typeval) == 2 {
+			fields := strings.Split(typeval[1], " ")
+
+			switch typeval[0] {
+			case "m":
+				if len(fields) > 0 {
+					switch fields[0] {
+					case "audio", "video":
+						infos = append(infos, Info{AVType: fields[0]})
+						info = &infos[len(infos)-1]
+					}
+				}
+
+			case "a":
+				if info != nil {
+					for _, field := range fields {
+						keyval := strings.Split(field, ":")
+						if len(keyval) >= 2 {
+							key := keyval[0]
+							val := keyval[1]
+							switch key {
+							case "control":
+								info.Control = val
+							case "rtpmap":
+								info.Rtpmap, _ = strconv.Atoi(val)
+							}
+						}
+						keyval = strings.Split(field, "/")
+						if len(keyval) >= 2 {
+							key := keyval[0]
+							switch key {
+							case "MPEG4-GENERIC":
+								info.Type = av.AAC
+								info.TimeScale, _ = strconv.Atoi(keyval[1])
+							case "H264":
+								info.Type = av.H264
+								info.TimeScale, _ = strconv.Atoi(keyval[1])
+							}
+						}
+						keyval = strings.Split(field, ";")
+						if len(keyval) > 1 {
+							for _, field := range keyval {
+								keyval := strings.SplitN(field, "=", 2)
+								if len(keyval) == 2 {
+									key := keyval[0]
+									val := keyval[1]
+									switch key {
+									case "config":
+										info.Config, _ = hex.DecodeString(val)
+									case "sprop-parameter-sets":
+										fields := strings.Split(val, ",")
+										for _, field := range fields {
+											val, _ := base64.StdEncoding.DecodeString(field)
+											info.SpropParameterSets = append(info.SpropParameterSets, val)
+										}
+									}
+								}
+							}
+						}
+					}
+				}
+
+			}
+		}
+	}
+	return
+}
+

sdp/parser_test.go

@@ -0,0 +1,36 @@
+package sdp
+
+import (
+	"testing"
+)
+
+func TestParse(t *testing.T) {
+	infos := Decode(`
+v=0
+o=- 1459325504777324 1 IN IP4 192.168.0.123
+s=RTSP/RTP stream from Network Video Server
+i=mpeg4cif
+t=0 0
+a=tool:LIVE555 Streaming Media v2009.09.28
+a=type:broadcast
+a=control:*
+a=range:npt=0-
+a=x-qt-text-nam:RTSP/RTP stream from Network Video Server
+a=x-qt-text-inf:mpeg4cif
+m=video 0 RTP/AVP 96
+c=IN IP4 0.0.0.0
+b=AS:300
+a=rtpmap:96 H264/90000
+a=fmtp:96 packetization-mode=1;profile-level-id=640028;sprop-parameter-sets=Z2QAKK2EBUViuKxUdCAqKxXFYqOhAVFYrisVHQgKisVxWKjoQFRWK4rFR0ICorFcVio6ECSFITk8nyfk/k/J8nm5s00IEkKQnJ5Pk/J/J+T5PNzZprQFoe0qQAAAHgAABDgYEABJPAAUmW974XhEI1A=,aO48sA==;config=0000000167640028ad84054562b8ac5474202a2b15c562a3a1015158ae2b151d080a8ac57158a8e84054562b8ac5474202a2b15c562a3a10248521393c9f27e4fe4fc9f279b9b34d081242909c9e4f93f27f27e4f93cdcd9a6b405a1ed2a4000001e00000438181000493c0014996f7be1784423500000000168ee3cb0
+a=x-dimensions: 720, 480
+a=x-framerate: 15
+a=control:track1
+m=audio 0 RTP/AVP 96
+c=IN IP4 0.0.0.0
+b=AS:256
+a=rtpmap:96 MPEG4-GENERIC/16000/2
+a=fmtp:96 streamtype=5;profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=1408
+a=control:track2
+`)
+	t.Logf("%v", infos)
+}

stream.go

@@ -2,19 +2,27 @@ package rtsp
 
 import (
 	"github.com/nareix/av"
+	"github.com/nareix/rtsp/sdp"
 )
 
 type Stream struct {
 	av.StreamCommon
-	typestr string
+	Sdp sdp.Info
-	control string
+
+	// h264
+	fuBuffer []byte
+	sps []byte
+	pps []byte
+
+	gotpkt bool
+	pkt av.Packet
 }
 
 func (self Stream) IsAudio() bool {
-	return self.typestr == "audio"
+	return self.Sdp.AVType == "audio"
 }
 
 func (self Stream) IsVideo() bool {
-	return self.typestr == "video"
+	return self.Sdp.AVType == "video"
 }