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conn.go
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conn.go
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// Package conn contains a RTSP connection implementation.
package conn
import (
"bufio"
"io"
"github.com/aler9/gortsplib/v2/pkg/base"
)
const (
readBufferSize = 4096
)
// Conn is a RTSP connection.
type Conn struct {
w io.Writer
br *bufio.Reader
req base.Request
res base.Response
fr base.InterleavedFrame
}
// NewConn allocates a Conn.
func NewConn(rw io.ReadWriter) *Conn {
return &Conn{
w: rw,
br: bufio.NewReaderSize(rw, readBufferSize),
}
}
// ReadRequest reads a Request.
func (c *Conn) ReadRequest() (*base.Request, error) {
err := c.req.Read(c.br)
return &c.req, err
}
// ReadResponse reads a Response.
func (c *Conn) ReadResponse() (*base.Response, error) {
err := c.res.Read(c.br)
return &c.res, err
}
// ReadInterleavedFrame reads a InterleavedFrame.
func (c *Conn) ReadInterleavedFrame() (*base.InterleavedFrame, error) {
err := c.fr.Read(c.br)
return &c.fr, err
}
// ReadInterleavedFrameOrRequest reads an InterleavedFrame or a Request.
func (c *Conn) ReadInterleavedFrameOrRequest() (interface{}, error) {
b, err := c.br.ReadByte()
if err != nil {
return nil, err
}
c.br.UnreadByte()
if b == base.InterleavedFrameMagicByte {
return c.ReadInterleavedFrame()
}
return c.ReadRequest()
}
// ReadInterleavedFrameOrResponse reads an InterleavedFrame or a Response.
func (c *Conn) ReadInterleavedFrameOrResponse() (interface{}, error) {
b, err := c.br.ReadByte()
if err != nil {
return nil, err
}
c.br.UnreadByte()
if b == base.InterleavedFrameMagicByte {
return c.ReadInterleavedFrame()
}
return c.ReadResponse()
}
// ReadRequestIgnoreFrames reads a Request and ignores frames in between.
func (c *Conn) ReadRequestIgnoreFrames() (*base.Request, error) {
for {
recv, err := c.ReadInterleavedFrameOrRequest()
if err != nil {
return nil, err
}
if req, ok := recv.(*base.Request); ok {
return req, nil
}
}
}
// ReadResponseIgnoreFrames reads a Response and ignores frames in between.
func (c *Conn) ReadResponseIgnoreFrames() (*base.Response, error) {
for {
recv, err := c.ReadInterleavedFrameOrResponse()
if err != nil {
return nil, err
}
if res, ok := recv.(*base.Response); ok {
return res, nil
}
}
}
// WriteRequest writes a request.
func (c *Conn) WriteRequest(req *base.Request) error {
buf, _ := req.Marshal()
_, err := c.w.Write(buf)
return err
}
// WriteResponse writes a response.
func (c *Conn) WriteResponse(res *base.Response) error {
buf, _ := res.Marshal()
_, err := c.w.Write(buf)
return err
}
// WriteInterleavedFrame writes an interleaved frame.
func (c *Conn) WriteInterleavedFrame(fr *base.InterleavedFrame, buf []byte) error {
n, _ := fr.MarshalTo(buf)
_, err := c.w.Write(buf[:n])
return err
}