51 lines
1.4 KiB
Go
51 lines
1.4 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 rtputil
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import "time"
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type RTPConverter struct {
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ts uint64
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rtp uint64
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}
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func NewRTPConverter(clockRate int64) *RTPConverter {
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ts := time.Second.Nanoseconds()
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for _, i := range []int64{10, 3, 2} {
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for ts%i == 0 && clockRate%i == 0 {
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ts /= i
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clockRate /= i
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}
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}
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return &RTPConverter{ts: uint64(ts), rtp: uint64(clockRate)}
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}
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func (r *RTPConverter) ToDuration(rtpTicks uint32) time.Duration {
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return time.Duration(uint64(rtpTicks) * r.ts / r.rtp)
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}
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func (r *RTPConverter) ToDurationExt(rtpExtTicks uint64) time.Duration {
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return time.Duration(uint64(rtpExtTicks) * r.ts / r.rtp)
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}
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func (r *RTPConverter) ToRTP(duration time.Duration) uint32 {
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return uint32(duration.Nanoseconds() * int64(r.rtp) / int64(r.ts))
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}
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func (r *RTPConverter) ToRTPExt(duration time.Duration) uint64 {
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return uint64(duration.Nanoseconds() * int64(r.rtp) / int64(r.ts))
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}
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