213 lines
3.2 KiB
Go
213 lines
3.2 KiB
Go
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package jpegstructure
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import (
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"github.com/dsoprea/go-logging"
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)
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const (
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// MARKER_SOI marker
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MARKER_SOI = 0xd8
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// MARKER_EOI marker
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MARKER_EOI = 0xd9
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// MARKER_SOS marker
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MARKER_SOS = 0xda
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// MARKER_SOD marker
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MARKER_SOD = 0x93
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// MARKER_DQT marker
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MARKER_DQT = 0xdb
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// MARKER_APP0 marker
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MARKER_APP0 = 0xe0
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// MARKER_APP1 marker
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MARKER_APP1 = 0xe1
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// MARKER_APP2 marker
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MARKER_APP2 = 0xe2
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// MARKER_APP3 marker
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MARKER_APP3 = 0xe3
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// MARKER_APP4 marker
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MARKER_APP4 = 0xe4
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// MARKER_APP5 marker
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MARKER_APP5 = 0xe5
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// MARKER_APP6 marker
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MARKER_APP6 = 0xe6
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// MARKER_APP7 marker
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MARKER_APP7 = 0xe7
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// MARKER_APP8 marker
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MARKER_APP8 = 0xe8
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// MARKER_APP10 marker
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MARKER_APP10 = 0xea
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// MARKER_APP12 marker
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MARKER_APP12 = 0xec
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// MARKER_APP13 marker
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MARKER_APP13 = 0xed
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// MARKER_APP14 marker
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MARKER_APP14 = 0xee
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// MARKER_APP15 marker
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MARKER_APP15 = 0xef
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// MARKER_COM marker
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MARKER_COM = 0xfe
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// MARKER_CME marker
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MARKER_CME = 0x64
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// MARKER_SIZ marker
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MARKER_SIZ = 0x51
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// MARKER_DHT marker
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MARKER_DHT = 0xc4
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// MARKER_JPG marker
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MARKER_JPG = 0xc8
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// MARKER_DAC marker
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MARKER_DAC = 0xcc
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// MARKER_SOF0 marker
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MARKER_SOF0 = 0xc0
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// MARKER_SOF1 marker
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MARKER_SOF1 = 0xc1
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// MARKER_SOF2 marker
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MARKER_SOF2 = 0xc2
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// MARKER_SOF3 marker
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MARKER_SOF3 = 0xc3
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// MARKER_SOF5 marker
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MARKER_SOF5 = 0xc5
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// MARKER_SOF6 marker
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MARKER_SOF6 = 0xc6
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// MARKER_SOF7 marker
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MARKER_SOF7 = 0xc7
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// MARKER_SOF9 marker
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MARKER_SOF9 = 0xc9
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// MARKER_SOF10 marker
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MARKER_SOF10 = 0xca
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// MARKER_SOF11 marker
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MARKER_SOF11 = 0xcb
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// MARKER_SOF13 marker
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MARKER_SOF13 = 0xcd
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// MARKER_SOF14 marker
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MARKER_SOF14 = 0xce
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// MARKER_SOF15 marker
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MARKER_SOF15 = 0xcf
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)
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var (
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jpegLogger = log.NewLogger("jpegstructure.jpeg")
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jpegMagicStandard = []byte{0xff, MARKER_SOI, 0xff}
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jpegMagic2000 = []byte{0xff, 0x4f, 0xff}
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markerLen = map[byte]int{
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0x00: 0,
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0x01: 0,
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0xd0: 0,
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0xd1: 0,
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0xd2: 0,
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0xd3: 0,
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0xd4: 0,
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0xd5: 0,
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0xd6: 0,
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0xd7: 0,
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0xd8: 0,
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0xd9: 0,
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0xda: 0,
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// J2C
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0x30: 0,
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0x31: 0,
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0x32: 0,
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0x33: 0,
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0x34: 0,
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0x35: 0,
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0x36: 0,
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0x37: 0,
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0x38: 0,
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0x39: 0,
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0x3a: 0,
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0x3b: 0,
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0x3c: 0,
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0x3d: 0,
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0x3e: 0,
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0x3f: 0,
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0x4f: 0,
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0x92: 0,
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0x93: 0,
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// J2C extensions
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0x74: 4,
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0x75: 4,
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0x77: 4,
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}
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markerNames = map[byte]string{
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MARKER_SOI: "SOI",
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MARKER_EOI: "EOI",
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MARKER_SOS: "SOS",
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MARKER_SOD: "SOD",
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MARKER_DQT: "DQT",
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MARKER_APP0: "APP0",
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MARKER_APP1: "APP1",
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MARKER_APP2: "APP2",
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MARKER_APP3: "APP3",
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MARKER_APP4: "APP4",
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MARKER_APP5: "APP5",
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MARKER_APP6: "APP6",
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MARKER_APP7: "APP7",
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MARKER_APP8: "APP8",
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MARKER_APP10: "APP10",
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MARKER_APP12: "APP12",
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MARKER_APP13: "APP13",
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MARKER_APP14: "APP14",
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MARKER_APP15: "APP15",
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MARKER_COM: "COM",
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MARKER_CME: "CME",
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MARKER_SIZ: "SIZ",
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MARKER_DHT: "DHT",
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MARKER_JPG: "JPG",
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MARKER_DAC: "DAC",
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MARKER_SOF0: "SOF0",
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MARKER_SOF1: "SOF1",
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MARKER_SOF2: "SOF2",
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MARKER_SOF3: "SOF3",
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MARKER_SOF5: "SOF5",
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MARKER_SOF6: "SOF6",
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MARKER_SOF7: "SOF7",
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MARKER_SOF9: "SOF9",
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MARKER_SOF10: "SOF10",
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MARKER_SOF11: "SOF11",
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MARKER_SOF13: "SOF13",
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MARKER_SOF14: "SOF14",
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MARKER_SOF15: "SOF15",
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}
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)
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