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Make NACK threshold depend on the average packet rate.
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parent
4a8e48d146
commit
a233f10b0b
1 changed files with 28 additions and 5 deletions
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@ -58,11 +58,35 @@ func readLoop(conn *rtpUpConnection, track *rtpUpTrack) {
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}
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first, index := track.cache.Store(
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packet.SequenceNumber, packet.Timestamp, kf, buf[:bytes],
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packet.SequenceNumber, packet.Timestamp,
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kf, buf[:bytes],
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)
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_, rate := track.rate.Estimate()
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delta := packet.SequenceNumber - first
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if (delta & 0x8000) != 0 {
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delta = 0
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}
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// send a NACK if a packet is late by 65ms or 2 packets,
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// whichever is more
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packets := rate / 16
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if packets > 24 {
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packets = 24
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}
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if packets < 2 {
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packets = 2
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}
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// send NACKs for more recent packets, this makes better
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// use of the NACK bitmap
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unnacked := uint16(4)
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if unnacked > uint16(packets) {
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unnacked = uint16(packets)
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}
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if uint32(delta) > packets {
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found, first, bitmap := track.cache.BitmapGet(
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packet.SequenceNumber - unnacked,
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)
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if packet.SequenceNumber-first > 24 {
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found, first, bitmap :=
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track.cache.BitmapGet(packet.SequenceNumber - 4)
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if found {
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err := conn.sendNACK(track, first, bitmap)
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if err != nil {
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@ -71,7 +95,6 @@ func readLoop(conn *rtpUpConnection, track *rtpUpTrack) {
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}
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}
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_, rate := track.rate.Estimate()
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delay := uint32(rtptime.JiffiesPerSec / 1024)
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if rate > 512 {
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delay = rtptime.JiffiesPerSec / rate / 2
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