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Fix adts producer for VLC player support #1643

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This commit is contained in:
Alex X
2025-11-20 17:52:08 +03:00
parent 68036b68c1
commit aa0ece2d1e
3 changed files with 45 additions and 17 deletions
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pkg/aac/adts.go
+13 -2
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@@ -8,8 +8,19 @@ import (
"github.com/pion/rtp"
)
const ADTSHeaderSize = 7
func IsADTS(b []byte) bool {
return len(b) > 7 && b[0] == 0xFF && b[1]&0xF6 == 0xF0
// AAAAAAAA AAAABCCD EEFFFFGH HHIJKLMM MMMMMMMM MMMOOOOO OOOOOOPP (QQQQQQQQ QQQQQQQQ)
// A 12 Syncword, all bits must be set to 1.
// C 2 Layer, always set to 0.
return len(b) >= ADTSHeaderSize && b[0] == 0xFF && b[1]&0b1111_0110 == 0xF0
}
func HasCRC(b []byte) bool {
// AAAAAAAA AAAABCCD EEFFFFGH HHIJKLMM MMMMMMMM MMMOOOOO OOOOOOPP (QQQQQQQQ QQQQQQQQ)
// D 1 Protection absence, set to 1 if there is no CRC and 0 if there is CRC.
return b[1]&0b1 == 0
}
func ADTSToCodec(b []byte) *core.Codec {
@@ -58,7 +69,7 @@ func ADTSToCodec(b []byte) *core.Codec {
func ReadADTSSize(b []byte) uint16 {
// AAAAAAAA AAAABCCD EEFFFFGH HHIJKLMM MMMMMMMM MMMOOOOO OOOOOOPP (QQQQQQQQ QQQQQQQQ)
_ = b[5] // bounds
return uint16(b[3]&0x03)<<(8+3) | uint16(b[4])<<3 | uint16(b[5]>>5)
return uint16(b[3]&0b11)<<11 | uint16(b[4])<<3 | uint16(b[5]>>5)
}
func WriteADTSSize(b []byte, size uint16) {