commit 2c4c5d7ef79d88f67d5fc142395436952ee1a747
parent b279aa15601e646f78eded27b6dd92982381a6d4
Author: blackfalcon <blackfalcon.ru@gmail.com>
Date: Sun, 26 May 2024 07:55:09 -0300
scte35: add makeCRC32Table
Diffstat:
| M | scte35/crc_32.go | | | 276 | ++++++------------------------------------------------------------------------- |
1 file changed, 19 insertions(+), 257 deletions(-)
diff --git a/scte35/crc_32.go b/scte35/crc_32.go
@@ -26,263 +26,25 @@ import (
var ErrCRC32Invalid = errors.New("CRC_32 not valid")
// crc32Table provides values for calculating an SCTE35 object's CRC32 value.
-var crc32Table = [...]uint{
- 0x00000000,
- 0x04C11DB7,
- 0x09823B6E,
- 0x0D4326D9,
- 0x130476DC,
- 0x17C56B6B,
- 0x1A864DB2,
- 0x1E475005,
- 0x2608EDB8,
- 0x22C9F00F,
- 0x2F8AD6D6,
- 0x2B4BCB61,
- 0x350C9B64,
- 0x31CD86D3,
- 0x3C8EA00A,
- 0x384FBDBD,
- 0x4C11DB70,
- 0x48D0C6C7,
- 0x4593E01E,
- 0x4152FDA9,
- 0x5F15ADAC,
- 0x5BD4B01B,
- 0x569796C2,
- 0x52568B75,
- 0x6A1936C8,
- 0x6ED82B7F,
- 0x639B0DA6,
- 0x675A1011,
- 0x791D4014,
- 0x7DDC5DA3,
- 0x709F7B7A,
- 0x745E66CD,
- 0x9823B6E0,
- 0x9CE2AB57,
- 0x91A18D8E,
- 0x95609039,
- 0x8B27C03C,
- 0x8FE6DD8B,
- 0x82A5FB52,
- 0x8664E6E5,
- 0xBE2B5B58,
- 0xBAEA46EF,
- 0xB7A96036,
- 0xB3687D81,
- 0xAD2F2D84,
- 0xA9EE3033,
- 0xA4AD16EA,
- 0xA06C0B5D,
- 0xD4326D90,
- 0xD0F37027,
- 0xDDB056FE,
- 0xD9714B49,
- 0xC7361B4C,
- 0xC3F706FB,
- 0xCEB42022,
- 0xCA753D95,
- 0xF23A8028,
- 0xF6FB9D9F,
- 0xFBB8BB46,
- 0xFF79A6F1,
- 0xE13EF6F4,
- 0xE5FFEB43,
- 0xE8BCCD9A,
- 0xEC7DD02D,
- 0x34867077,
- 0x30476DC0,
- 0x3D044B19,
- 0x39C556AE,
- 0x278206AB,
- 0x23431B1C,
- 0x2E003DC5,
- 0x2AC12072,
- 0x128E9DCF,
- 0x164F8078,
- 0x1B0CA6A1,
- 0x1FCDBB16,
- 0x018AEB13,
- 0x054BF6A4,
- 0x0808D07D,
- 0x0CC9CDCA,
- 0x7897AB07,
- 0x7C56B6B0,
- 0x71159069,
- 0x75D48DDE,
- 0x6B93DDDB,
- 0x6F52C06C,
- 0x6211E6B5,
- 0x66D0FB02,
- 0x5E9F46BF,
- 0x5A5E5B08,
- 0x571D7DD1,
- 0x53DC6066,
- 0x4D9B3063,
- 0x495A2DD4,
- 0x44190B0D,
- 0x40D816BA,
- 0xACA5C697,
- 0xA864DB20,
- 0xA527FDF9,
- 0xA1E6E04E,
- 0xBFA1B04B,
- 0xBB60ADFC,
- 0xB6238B25,
- 0xB2E29692,
- 0x8AAD2B2F,
- 0x8E6C3698,
- 0x832F1041,
- 0x87EE0DF6,
- 0x99A95DF3,
- 0x9D684044,
- 0x902B669D,
- 0x94EA7B2A,
- 0xE0B41DE7,
- 0xE4750050,
- 0xE9362689,
- 0xEDF73B3E,
- 0xF3B06B3B,
- 0xF771768C,
- 0xFA325055,
- 0xFEF34DE2,
- 0xC6BCF05F,
- 0xC27DEDE8,
- 0xCF3ECB31,
- 0xCBFFD686,
- 0xD5B88683,
- 0xD1799B34,
- 0xDC3ABDED,
- 0xD8FBA05A,
- 0x690CE0EE,
- 0x6DCDFD59,
- 0x608EDB80,
- 0x644FC637,
- 0x7A089632,
- 0x7EC98B85,
- 0x738AAD5C,
- 0x774BB0EB,
- 0x4F040D56,
- 0x4BC510E1,
- 0x46863638,
- 0x42472B8F,
- 0x5C007B8A,
- 0x58C1663D,
- 0x558240E4,
- 0x51435D53,
- 0x251D3B9E,
- 0x21DC2629,
- 0x2C9F00F0,
- 0x285E1D47,
- 0x36194D42,
- 0x32D850F5,
- 0x3F9B762C,
- 0x3B5A6B9B,
- 0x0315D626,
- 0x07D4CB91,
- 0x0A97ED48,
- 0x0E56F0FF,
- 0x1011A0FA,
- 0x14D0BD4D,
- 0x19939B94,
- 0x1D528623,
- 0xF12F560E,
- 0xF5EE4BB9,
- 0xF8AD6D60,
- 0xFC6C70D7,
- 0xE22B20D2,
- 0xE6EA3D65,
- 0xEBA91BBC,
- 0xEF68060B,
- 0xD727BBB6,
- 0xD3E6A601,
- 0xDEA580D8,
- 0xDA649D6F,
- 0xC423CD6A,
- 0xC0E2D0DD,
- 0xCDA1F604,
- 0xC960EBB3,
- 0xBD3E8D7E,
- 0xB9FF90C9,
- 0xB4BCB610,
- 0xB07DABA7,
- 0xAE3AFBA2,
- 0xAAFBE615,
- 0xA7B8C0CC,
- 0xA379DD7B,
- 0x9B3660C6,
- 0x9FF77D71,
- 0x92B45BA8,
- 0x9675461F,
- 0x8832161A,
- 0x8CF30BAD,
- 0x81B02D74,
- 0x857130C3,
- 0x5D8A9099,
- 0x594B8D2E,
- 0x5408ABF7,
- 0x50C9B640,
- 0x4E8EE645,
- 0x4A4FFBF2,
- 0x470CDD2B,
- 0x43CDC09C,
- 0x7B827D21,
- 0x7F436096,
- 0x7200464F,
- 0x76C15BF8,
- 0x68860BFD,
- 0x6C47164A,
- 0x61043093,
- 0x65C52D24,
- 0x119B4BE9,
- 0x155A565E,
- 0x18197087,
- 0x1CD86D30,
- 0x029F3D35,
- 0x065E2082,
- 0x0B1D065B,
- 0x0FDC1BEC,
- 0x3793A651,
- 0x3352BBE6,
- 0x3E119D3F,
- 0x3AD08088,
- 0x2497D08D,
- 0x2056CD3A,
- 0x2D15EBE3,
- 0x29D4F654,
- 0xC5A92679,
- 0xC1683BCE,
- 0xCC2B1D17,
- 0xC8EA00A0,
- 0xD6AD50A5,
- 0xD26C4D12,
- 0xDF2F6BCB,
- 0xDBEE767C,
- 0xE3A1CBC1,
- 0xE760D676,
- 0xEA23F0AF,
- 0xEEE2ED18,
- 0xF0A5BD1D,
- 0xF464A0AA,
- 0xF9278673,
- 0xFDE69BC4,
- 0x89B8FD09,
- 0x8D79E0BE,
- 0x803AC667,
- 0x84FBDBD0,
- 0x9ABC8BD5,
- 0x9E7D9662,
- 0x933EB0BB,
- 0x97FFAD0C,
- 0xAFB010B1,
- 0xAB710D06,
- 0xA6322BDF,
- 0xA2F33668,
- 0xBCB4666D,
- 0xB8757BDA,
- 0xB5365D03,
- 0xB1F740B4,
+var crc32Table = makeCRC32Table()
+
+// makeCRC32Table generates CRC32/BZIP2 table
+func makeCRC32Table() [256]uint32 {
+ const poly = 0x04C11DB7
+ crctable := [256]uint32{}
+
+ for i := range crctable {
+ crc := uint32(i) << 24
+ for j := 0; j < 8; j++ {
+ if crc&0x80000000 != 0 {
+ crc = (crc << 1) ^ poly
+ } else {
+ crc = crc << 1
+ }
+ }
+ crctable[i] = crc
+ }
+ return crctable
}
// calculateCRC32 takes an byte array Writer containing all of the bytes of a
