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Don't rewrite PID for VP9.
Rewriting is not useful for VP9, and even harmful, as it breaks the offsets in the scalability structure.
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parent
48a9b10ce8
commit
d96a48f805
1 changed files with 2 additions and 18 deletions
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@ -234,7 +234,7 @@ type Flags struct {
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Start bool
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End bool
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Keyframe bool
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Pid uint16
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Pid uint16 // only returned for VP8
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Tid uint8
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Sid uint8
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TidUpSync bool
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@ -295,7 +295,6 @@ func PacketFlags(codec string, buf []byte) (Flags, error) {
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flags.Keyframe = (vp9.Payload[0] & 0x6) == 0
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}
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}
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flags.Pid = vp9.PictureID
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flags.Tid = vp9.TID
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flags.Sid = vp9.SID
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flags.TidUpSync = flags.Keyframe || vp9.U
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@ -335,6 +334,7 @@ func RewritePacket(codec string, data []byte, setMarker bool, seqno uint16, delt
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}
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}
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// only rewrite PID for VP8.
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if strings.EqualFold(codec, "video/vp8") {
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x := (data[offset] & 0x80) != 0
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if !x {
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@ -355,22 +355,6 @@ func RewritePacket(codec string, data []byte, setMarker bool, seqno uint16, delt
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data[offset+2] = (data[offset+2] + uint8(delta)) & 0x7F
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}
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return nil
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} else if strings.EqualFold(codec, "video/vp9") {
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i := (data[offset] & 0x80) != 0
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if !i {
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return nil
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}
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m := (data[offset+1] & 0x80) != 0
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if m {
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pid := (uint16(data[offset+1]&0x7F) << 8) |
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uint16(data[offset+2])
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pid = (pid + delta) & 0x7FFF
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data[offset+1] = 0x80 | byte((pid>>8)&0x7F)
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data[offset+2] = byte(pid & 0xFF)
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} else {
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data[offset+1] = (data[offset+1] + uint8(delta)) & 0x7F
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}
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return nil
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}
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return errUnsupportedCodec
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