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server/vendor/github.com/pion/webrtc/v3/internal/fmtp/av1.go

@@ -0,0 +1,41 @@
+// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
+// SPDX-License-Identifier: MIT
+
+package fmtp
+
+type av1FMTP struct {
+	parameters map[string]string
+}
+
+func (h *av1FMTP) MimeType() string {
+	return "video/av1"
+}
+
+func (h *av1FMTP) Match(b FMTP) bool {
+	c, ok := b.(*av1FMTP)
+	if !ok {
+		return false
+	}
+
+	// RTP Payload Format For AV1 (v1.0)
+	// https://aomediacodec.github.io/av1-rtp-spec/
+	// If the profile parameter is not present, it MUST be inferred to be 0 (“Main” profile).
+	hProfile, ok := h.parameters["profile"]
+	if !ok {
+		hProfile = "0"
+	}
+	cProfile, ok := c.parameters["profile"]
+	if !ok {
+		cProfile = "0"
+	}
+	if hProfile != cProfile {
+		return false
+	}
+
+	return true
+}
+
+func (h *av1FMTP) Parameter(key string) (string, bool) {
+	v, ok := h.parameters[key]
+	return v, ok
+}

server/vendor/github.com/pion/webrtc/v3/internal/fmtp/fmtp.go

@@ -0,0 +1,112 @@
+// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
+// SPDX-License-Identifier: MIT
+
+// Package fmtp implements per codec parsing of fmtp lines
+package fmtp
+
+import (
+	"strings"
+)
+
+func parseParameters(line string) map[string]string {
+	parameters := make(map[string]string)
+
+	for _, p := range strings.Split(line, ";") {
+		pp := strings.SplitN(strings.TrimSpace(p), "=", 2)
+		key := strings.ToLower(pp[0])
+		var value string
+		if len(pp) > 1 {
+			value = pp[1]
+		}
+		parameters[key] = value
+	}
+
+	return parameters
+}
+
+// FMTP interface for implementing custom
+// FMTP parsers based on MimeType
+type FMTP interface {
+	// MimeType returns the MimeType associated with
+	// the fmtp
+	MimeType() string
+	// Match compares two fmtp descriptions for
+	// compatibility based on the MimeType
+	Match(f FMTP) bool
+	// Parameter returns a value for the associated key
+	// if contained in the parsed fmtp string
+	Parameter(key string) (string, bool)
+}
+
+// Parse parses an fmtp string based on the MimeType
+func Parse(mimeType, line string) FMTP {
+	var f FMTP
+
+	parameters := parseParameters(line)
+
+	switch {
+	case strings.EqualFold(mimeType, "video/h264"):
+		f = &h264FMTP{
+			parameters: parameters,
+		}
+
+	case strings.EqualFold(mimeType, "video/vp9"):
+		f = &vp9FMTP{
+			parameters: parameters,
+		}
+
+	case strings.EqualFold(mimeType, "video/av1"):
+		f = &av1FMTP{
+			parameters: parameters,
+		}
+
+	default:
+		f = &genericFMTP{
+			mimeType:   mimeType,
+			parameters: parameters,
+		}
+	}
+
+	return f
+}
+
+type genericFMTP struct {
+	mimeType   string
+	parameters map[string]string
+}
+
+func (g *genericFMTP) MimeType() string {
+	return g.mimeType
+}
+
+// Match returns true if g and b are compatible fmtp descriptions
+// The generic implementation is used for MimeTypes that are not defined
+func (g *genericFMTP) Match(b FMTP) bool {
+	c, ok := b.(*genericFMTP)
+	if !ok {
+		return false
+	}
+
+	if !strings.EqualFold(g.mimeType, c.MimeType()) {
+		return false
+	}
+
+	for k, v := range g.parameters {
+		if vb, ok := c.parameters[k]; ok && !strings.EqualFold(vb, v) {
+			return false
+		}
+	}
+
+	for k, v := range c.parameters {
+		if va, ok := g.parameters[k]; ok && !strings.EqualFold(va, v) {
+			return false
+		}
+	}
+
+	return true
+}
+
+func (g *genericFMTP) Parameter(key string) (string, bool) {
+	v, ok := g.parameters[key]
+	return v, ok
+}

server/vendor/github.com/pion/webrtc/v3/internal/fmtp/h264.go

@@ -0,0 +1,84 @@
+// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
+// SPDX-License-Identifier: MIT
+
+package fmtp
+
+import (
+	"encoding/hex"
+)
+
+func profileLevelIDMatches(a, b string) bool {
+	aa, err := hex.DecodeString(a)
+	if err != nil || len(aa) < 2 {
+		return false
+	}
+	bb, err := hex.DecodeString(b)
+	if err != nil || len(bb) < 2 {
+		return false
+	}
+	return aa[0] == bb[0] && aa[1] == bb[1]
+}
+
+type h264FMTP struct {
+	parameters map[string]string
+}
+
+func (h *h264FMTP) MimeType() string {
+	return "video/h264"
+}
+
+// Match returns true if h and b are compatible fmtp descriptions
+// Based on RFC6184 Section 8.2.2:
+//
+//	The parameters identifying a media format configuration for H.264
+//	are profile-level-id and packetization-mode.  These media format
+//	configuration parameters (except for the level part of profile-
+//	level-id) MUST be used symmetrically; that is, the answerer MUST
+//	either maintain all configuration parameters or remove the media
+//	format (payload type) completely if one or more of the parameter
+//	values are not supported.
+//	  Informative note: The requirement for symmetric use does not
+//	  apply for the level part of profile-level-id and does not apply
+//	  for the other stream properties and capability parameters.
+func (h *h264FMTP) Match(b FMTP) bool {
+	c, ok := b.(*h264FMTP)
+	if !ok {
+		return false
+	}
+
+	// test packetization-mode
+	hpmode, hok := h.parameters["packetization-mode"]
+	if !hok {
+		return false
+	}
+	cpmode, cok := c.parameters["packetization-mode"]
+	if !cok {
+		return false
+	}
+
+	if hpmode != cpmode {
+		return false
+	}
+
+	// test profile-level-id
+	hplid, hok := h.parameters["profile-level-id"]
+	if !hok {
+		return false
+	}
+
+	cplid, cok := c.parameters["profile-level-id"]
+	if !cok {
+		return false
+	}
+
+	if !profileLevelIDMatches(hplid, cplid) {
+		return false
+	}
+
+	return true
+}
+
+func (h *h264FMTP) Parameter(key string) (string, bool) {
+	v, ok := h.parameters[key]
+	return v, ok
+}

server/vendor/github.com/pion/webrtc/v3/internal/fmtp/vp9.go

@@ -0,0 +1,41 @@
+// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
+// SPDX-License-Identifier: MIT
+
+package fmtp
+
+type vp9FMTP struct {
+	parameters map[string]string
+}
+
+func (h *vp9FMTP) MimeType() string {
+	return "video/vp9"
+}
+
+func (h *vp9FMTP) Match(b FMTP) bool {
+	c, ok := b.(*vp9FMTP)
+	if !ok {
+		return false
+	}
+
+	// RTP Payload Format for VP9 Video - draft-ietf-payload-vp9-16
+	// https://datatracker.ietf.org/doc/html/draft-ietf-payload-vp9-16
+	// If no profile-id is present, Profile 0 MUST be inferred
+	hProfileID, ok := h.parameters["profile-id"]
+	if !ok {
+		hProfileID = "0"
+	}
+	cProfileID, ok := c.parameters["profile-id"]
+	if !ok {
+		cProfileID = "0"
+	}
+	if hProfileID != cProfileID {
+		return false
+	}
+
+	return true
+}
+
+func (h *vp9FMTP) Parameter(key string) (string, bool) {
+	v, ok := h.parameters[key]
+	return v, ok
+}