111 lines
2.3 KiB
Go
111 lines
2.3 KiB
Go
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package sdp
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import (
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"strconv"
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"strings"
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)
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// Information describes the "i=" field which provides textual information
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// about the session.
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type Information string
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func (i Information) String() string {
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return string(i)
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}
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// ConnectionInformation defines the representation for the "c=" field
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// containing connection data.
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type ConnectionInformation struct {
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NetworkType string
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AddressType string
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Address *Address
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}
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func (c ConnectionInformation) String() string {
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parts := []string{c.NetworkType, c.AddressType}
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if c.Address != nil && c.Address.String() != "" {
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parts = append(parts, c.Address.String())
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}
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return strings.Join(parts, " ")
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}
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// Address desribes a structured address token from within the "c=" field.
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type Address struct {
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Address string
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TTL *int
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Range *int
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}
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func (c *Address) String() string {
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var parts []string
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parts = append(parts, c.Address)
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if c.TTL != nil {
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parts = append(parts, strconv.Itoa(*c.TTL))
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}
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if c.Range != nil {
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parts = append(parts, strconv.Itoa(*c.Range))
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}
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return strings.Join(parts, "/")
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}
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// Bandwidth describes an optional field which denotes the proposed bandwidth
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// to be used by the session or media.
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type Bandwidth struct {
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Experimental bool
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Type string
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Bandwidth uint64
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}
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func (b Bandwidth) String() string {
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var output string
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if b.Experimental {
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output += "X-"
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}
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output += b.Type + ":" + strconv.FormatUint(b.Bandwidth, 10)
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return output
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}
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// EncryptionKey describes the "k=" which conveys encryption key information.
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type EncryptionKey string
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func (s EncryptionKey) String() string {
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return string(s)
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}
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// Attribute describes the "a=" field which represents the primary means for
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// extending SDP.
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type Attribute struct {
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Key string
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Value string
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}
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// NewPropertyAttribute constructs a new attribute
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func NewPropertyAttribute(key string) Attribute {
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return Attribute{
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Key: key,
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}
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}
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// NewAttribute constructs a new attribute
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func NewAttribute(key, value string) Attribute {
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return Attribute{
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Key: key,
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Value: value,
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}
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}
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func (a Attribute) String() string {
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output := a.Key
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if len(a.Value) > 0 {
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output += ":" + a.Value
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}
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return output
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}
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// IsICECandidate returns true if the attribute key equals "candidate".
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func (a Attribute) IsICECandidate() bool {
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return a.Key == "candidate"
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}
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