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40 lines
1.0 KiB
Go
40 lines
1.0 KiB
Go
5 years ago
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// Copyright 2020, Chef. All rights reserved.
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// https://github.com/q191201771/lal
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//
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// Use of this source code is governed by a MIT-style license
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// that can be found in the License file.
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//
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// Author: Chef (191201771@qq.com)
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package hevc
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var NaluUintTypeMapping = map[uint8]string{
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NaluUnitTypeSliceTrailR: "SLICE",
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NaluUnitTypeSliceIDR: "I",
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NaluUintTypeSliceIDRNLP: "IDR",
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NaluUnitTypeSEI: "SEI",
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NaluUnitTypeSEISuffix: "SEI",
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}
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var (
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NaluUnitTypeSliceTrailR uint8 = 1 // 0x01
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NaluUnitTypeSliceIDR uint8 = 19 // 0x13
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NaluUintTypeSliceIDRNLP uint8 = 20 // 0x14
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NaluUnitTypeVPS uint8 = 32 // 0x20
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NaluUnitTypeSPS uint8 = 33 // 0x21
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NaluUnitTypePPS uint8 = 34 // 0x22
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NaluUnitTypeSEI uint8 = 39 // 0x27
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NaluUnitTypeSEISuffix uint8 = 40 // 0x28
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)
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func CalcNaluTypeReadable(nalu []byte) string {
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b, ok := NaluUintTypeMapping[CalcNaluType(nalu)]
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if !ok {
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return "unknown"
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}
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return b
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}
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func CalcNaluType(nalu []byte) uint8 {
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return (nalu[0] & 0x7E) >> 1
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}
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