mirror of
https://github.com/pion/mediadevices.git
synced 2026-04-22 15:57:27 +08:00
Lukas Herman
2f5e4ee914
Changelog: * Better support for non-webrtc use cases * Enable multiple readers * Enhance codec selectors * Update APIs to reflect on the new v3 webrtc design * Cleaner APIs
37 lines
1.1 KiB
Go
37 lines
1.1 KiB
Go
package mediadevices
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import (
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"math"
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"time"
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"github.com/pion/webrtc/v2"
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"github.com/pion/webrtc/v2/pkg/media"
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)
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type samplerFunc func(b []byte) error
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// newVideoSampler creates a video sampler that uses the actual video frame rate and
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// the codec's clock rate to come up with a duration for each sample.
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func newVideoSampler(t *webrtc.Track) samplerFunc {
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clockRate := float64(t.Codec().ClockRate)
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lastTimestamp := time.Now()
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return samplerFunc(func(b []byte) error {
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now := time.Now()
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duration := now.Sub(lastTimestamp).Seconds()
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samples := uint32(math.Round(clockRate * duration))
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lastTimestamp = now
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return t.WriteSample(media.Sample{Data: b, Samples: samples})
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})
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}
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// newAudioSampler creates a audio sampler that uses a fixed latency and
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// the codec's clock rate to come up with a duration for each sample.
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func newAudioSampler(t *webrtc.Track, latency time.Duration) samplerFunc {
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samples := uint32(math.Round(float64(t.Codec().ClockRate) * latency.Seconds()))
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return samplerFunc(func(b []byte) error {
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return t.WriteSample(media.Sample{Data: b, Samples: samples})
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})
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}
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