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45 lines
1.5 KiB
Go
45 lines
1.5 KiB
Go
// Copyright 2023 LiveKit, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package sfu
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import (
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"strings"
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"github.com/pion/webrtc/v3"
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)
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// Do a fuzzy find for a codec in the list of codecs
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// Used for lookup up a codec in an existing list to find a match
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func codecParametersFuzzySearch(needle webrtc.RTPCodecParameters, haystack []webrtc.RTPCodecParameters) (webrtc.RTPCodecParameters, error) {
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// First attempt to match on MimeType + SDPFmtpLine
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for _, c := range haystack {
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if strings.EqualFold(c.RTPCodecCapability.MimeType, needle.RTPCodecCapability.MimeType) &&
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c.RTPCodecCapability.SDPFmtpLine == needle.RTPCodecCapability.SDPFmtpLine {
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return c, nil
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}
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}
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// Fallback to just MimeType
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for _, c := range haystack {
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if strings.EqualFold(c.RTPCodecCapability.MimeType, needle.RTPCodecCapability.MimeType) {
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return c, nil
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}
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}
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return webrtc.RTPCodecParameters{}, webrtc.ErrCodecNotFound
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}
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// -----------------------------------------------
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