mirror of
https://gitlab.com/pholy/OSCAR-code.git
synced 2025-04-05 10:40:42 +00:00
Move PRS1 file parsing into separate parser file.
No change in functionality.
Use git blame dd9a087 to follow the history before this refactoring.
This commit is contained in:
sawinglogz
parent
6fc41537e2
commit
c5175b20d2
@ -43,152 +43,6 @@
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// that change loader behaviour or modify channels.
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//********************************************************************************************
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// CRC-16/KERMIT, polynomial: 0x11021, bit reverse algorithm
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// Table generated by crcmod (crc-kermit)
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typedef quint16 crc16_t;
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static crc16_t CRC16(unsigned char * data, size_t data_len, crc16_t crc=0)
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{
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static const crc16_t table[256] = {
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0x0000U, 0x1189U, 0x2312U, 0x329bU, 0x4624U, 0x57adU, 0x6536U, 0x74bfU,
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0x8c48U, 0x9dc1U, 0xaf5aU, 0xbed3U, 0xca6cU, 0xdbe5U, 0xe97eU, 0xf8f7U,
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0x1081U, 0x0108U, 0x3393U, 0x221aU, 0x56a5U, 0x472cU, 0x75b7U, 0x643eU,
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0x9cc9U, 0x8d40U, 0xbfdbU, 0xae52U, 0xdaedU, 0xcb64U, 0xf9ffU, 0xe876U,
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0x2102U, 0x308bU, 0x0210U, 0x1399U, 0x6726U, 0x76afU, 0x4434U, 0x55bdU,
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0xad4aU, 0xbcc3U, 0x8e58U, 0x9fd1U, 0xeb6eU, 0xfae7U, 0xc87cU, 0xd9f5U,
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0x3183U, 0x200aU, 0x1291U, 0x0318U, 0x77a7U, 0x662eU, 0x54b5U, 0x453cU,
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0xbdcbU, 0xac42U, 0x9ed9U, 0x8f50U, 0xfbefU, 0xea66U, 0xd8fdU, 0xc974U,
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0x4204U, 0x538dU, 0x6116U, 0x709fU, 0x0420U, 0x15a9U, 0x2732U, 0x36bbU,
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0xce4cU, 0xdfc5U, 0xed5eU, 0xfcd7U, 0x8868U, 0x99e1U, 0xab7aU, 0xbaf3U,
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0x5285U, 0x430cU, 0x7197U, 0x601eU, 0x14a1U, 0x0528U, 0x37b3U, 0x263aU,
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0xdecdU, 0xcf44U, 0xfddfU, 0xec56U, 0x98e9U, 0x8960U, 0xbbfbU, 0xaa72U,
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0x6306U, 0x728fU, 0x4014U, 0x519dU, 0x2522U, 0x34abU, 0x0630U, 0x17b9U,
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0xef4eU, 0xfec7U, 0xcc5cU, 0xddd5U, 0xa96aU, 0xb8e3U, 0x8a78U, 0x9bf1U,
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0x7387U, 0x620eU, 0x5095U, 0x411cU, 0x35a3U, 0x242aU, 0x16b1U, 0x0738U,
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0xffcfU, 0xee46U, 0xdcddU, 0xcd54U, 0xb9ebU, 0xa862U, 0x9af9U, 0x8b70U,
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0x8408U, 0x9581U, 0xa71aU, 0xb693U, 0xc22cU, 0xd3a5U, 0xe13eU, 0xf0b7U,
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0x0840U, 0x19c9U, 0x2b52U, 0x3adbU, 0x4e64U, 0x5fedU, 0x6d76U, 0x7cffU,
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0x9489U, 0x8500U, 0xb79bU, 0xa612U, 0xd2adU, 0xc324U, 0xf1bfU, 0xe036U,
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0x18c1U, 0x0948U, 0x3bd3U, 0x2a5aU, 0x5ee5U, 0x4f6cU, 0x7df7U, 0x6c7eU,
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0xa50aU, 0xb483U, 0x8618U, 0x9791U, 0xe32eU, 0xf2a7U, 0xc03cU, 0xd1b5U,
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0x2942U, 0x38cbU, 0x0a50U, 0x1bd9U, 0x6f66U, 0x7eefU, 0x4c74U, 0x5dfdU,
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0xb58bU, 0xa402U, 0x9699U, 0x8710U, 0xf3afU, 0xe226U, 0xd0bdU, 0xc134U,
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0x39c3U, 0x284aU, 0x1ad1U, 0x0b58U, 0x7fe7U, 0x6e6eU, 0x5cf5U, 0x4d7cU,
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0xc60cU, 0xd785U, 0xe51eU, 0xf497U, 0x8028U, 0x91a1U, 0xa33aU, 0xb2b3U,
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0x4a44U, 0x5bcdU, 0x6956U, 0x78dfU, 0x0c60U, 0x1de9U, 0x2f72U, 0x3efbU,
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0xd68dU, 0xc704U, 0xf59fU, 0xe416U, 0x90a9U, 0x8120U, 0xb3bbU, 0xa232U,
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0x5ac5U, 0x4b4cU, 0x79d7U, 0x685eU, 0x1ce1U, 0x0d68U, 0x3ff3U, 0x2e7aU,
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0xe70eU, 0xf687U, 0xc41cU, 0xd595U, 0xa12aU, 0xb0a3U, 0x8238U, 0x93b1U,
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0x6b46U, 0x7acfU, 0x4854U, 0x59ddU, 0x2d62U, 0x3cebU, 0x0e70U, 0x1ff9U,
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0xf78fU, 0xe606U, 0xd49dU, 0xc514U, 0xb1abU, 0xa022U, 0x92b9U, 0x8330U,
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0x7bc7U, 0x6a4eU, 0x58d5U, 0x495cU, 0x3de3U, 0x2c6aU, 0x1ef1U, 0x0f78U,
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};
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for (size_t i=0; i < data_len; i++) {
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crc = table[(*data ^ (unsigned char)crc) & 0xFF] ^ (crc >> 8);
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data++;
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}
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return crc;
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}
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// CRC-32/MPEG-2, polynomial: 0x104C11DB7
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// Table generated by crcmod (crc-32-mpeg)
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typedef quint32 crc32_t;
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static crc32_t CRC32(const unsigned char *data, size_t data_len, crc32_t crc=0xffffffffU)
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{
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static const crc32_t table[256] = {
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0x00000000U, 0x04c11db7U, 0x09823b6eU, 0x0d4326d9U,
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0x130476dcU, 0x17c56b6bU, 0x1a864db2U, 0x1e475005U,
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0x2608edb8U, 0x22c9f00fU, 0x2f8ad6d6U, 0x2b4bcb61U,
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0x350c9b64U, 0x31cd86d3U, 0x3c8ea00aU, 0x384fbdbdU,
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0x4c11db70U, 0x48d0c6c7U, 0x4593e01eU, 0x4152fda9U,
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0x5f15adacU, 0x5bd4b01bU, 0x569796c2U, 0x52568b75U,
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0x6a1936c8U, 0x6ed82b7fU, 0x639b0da6U, 0x675a1011U,
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0x791d4014U, 0x7ddc5da3U, 0x709f7b7aU, 0x745e66cdU,
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0x9823b6e0U, 0x9ce2ab57U, 0x91a18d8eU, 0x95609039U,
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0x8b27c03cU, 0x8fe6dd8bU, 0x82a5fb52U, 0x8664e6e5U,
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0xbe2b5b58U, 0xbaea46efU, 0xb7a96036U, 0xb3687d81U,
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0xad2f2d84U, 0xa9ee3033U, 0xa4ad16eaU, 0xa06c0b5dU,
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0xd4326d90U, 0xd0f37027U, 0xddb056feU, 0xd9714b49U,
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0xc7361b4cU, 0xc3f706fbU, 0xceb42022U, 0xca753d95U,
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0xf23a8028U, 0xf6fb9d9fU, 0xfbb8bb46U, 0xff79a6f1U,
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0xe13ef6f4U, 0xe5ffeb43U, 0xe8bccd9aU, 0xec7dd02dU,
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0x34867077U, 0x30476dc0U, 0x3d044b19U, 0x39c556aeU,
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0x278206abU, 0x23431b1cU, 0x2e003dc5U, 0x2ac12072U,
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0x128e9dcfU, 0x164f8078U, 0x1b0ca6a1U, 0x1fcdbb16U,
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0x018aeb13U, 0x054bf6a4U, 0x0808d07dU, 0x0cc9cdcaU,
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0x7897ab07U, 0x7c56b6b0U, 0x71159069U, 0x75d48ddeU,
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0x6b93dddbU, 0x6f52c06cU, 0x6211e6b5U, 0x66d0fb02U,
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0x5e9f46bfU, 0x5a5e5b08U, 0x571d7dd1U, 0x53dc6066U,
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0x4d9b3063U, 0x495a2dd4U, 0x44190b0dU, 0x40d816baU,
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0xaca5c697U, 0xa864db20U, 0xa527fdf9U, 0xa1e6e04eU,
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0xbfa1b04bU, 0xbb60adfcU, 0xb6238b25U, 0xb2e29692U,
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0x8aad2b2fU, 0x8e6c3698U, 0x832f1041U, 0x87ee0df6U,
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0x99a95df3U, 0x9d684044U, 0x902b669dU, 0x94ea7b2aU,
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0xe0b41de7U, 0xe4750050U, 0xe9362689U, 0xedf73b3eU,
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0xf3b06b3bU, 0xf771768cU, 0xfa325055U, 0xfef34de2U,
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0xc6bcf05fU, 0xc27dede8U, 0xcf3ecb31U, 0xcbffd686U,
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0xd5b88683U, 0xd1799b34U, 0xdc3abdedU, 0xd8fba05aU,
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0x690ce0eeU, 0x6dcdfd59U, 0x608edb80U, 0x644fc637U,
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0x7a089632U, 0x7ec98b85U, 0x738aad5cU, 0x774bb0ebU,
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0x4f040d56U, 0x4bc510e1U, 0x46863638U, 0x42472b8fU,
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0x5c007b8aU, 0x58c1663dU, 0x558240e4U, 0x51435d53U,
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0x251d3b9eU, 0x21dc2629U, 0x2c9f00f0U, 0x285e1d47U,
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0x36194d42U, 0x32d850f5U, 0x3f9b762cU, 0x3b5a6b9bU,
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0x0315d626U, 0x07d4cb91U, 0x0a97ed48U, 0x0e56f0ffU,
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0x1011a0faU, 0x14d0bd4dU, 0x19939b94U, 0x1d528623U,
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0xf12f560eU, 0xf5ee4bb9U, 0xf8ad6d60U, 0xfc6c70d7U,
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0xe22b20d2U, 0xe6ea3d65U, 0xeba91bbcU, 0xef68060bU,
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0xd727bbb6U, 0xd3e6a601U, 0xdea580d8U, 0xda649d6fU,
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0xc423cd6aU, 0xc0e2d0ddU, 0xcda1f604U, 0xc960ebb3U,
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0xbd3e8d7eU, 0xb9ff90c9U, 0xb4bcb610U, 0xb07daba7U,
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0xae3afba2U, 0xaafbe615U, 0xa7b8c0ccU, 0xa379dd7bU,
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0x9b3660c6U, 0x9ff77d71U, 0x92b45ba8U, 0x9675461fU,
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0x8832161aU, 0x8cf30badU, 0x81b02d74U, 0x857130c3U,
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0x5d8a9099U, 0x594b8d2eU, 0x5408abf7U, 0x50c9b640U,
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0x4e8ee645U, 0x4a4ffbf2U, 0x470cdd2bU, 0x43cdc09cU,
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0x7b827d21U, 0x7f436096U, 0x7200464fU, 0x76c15bf8U,
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0x68860bfdU, 0x6c47164aU, 0x61043093U, 0x65c52d24U,
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0x119b4be9U, 0x155a565eU, 0x18197087U, 0x1cd86d30U,
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0x029f3d35U, 0x065e2082U, 0x0b1d065bU, 0x0fdc1becU,
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0x3793a651U, 0x3352bbe6U, 0x3e119d3fU, 0x3ad08088U,
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0x2497d08dU, 0x2056cd3aU, 0x2d15ebe3U, 0x29d4f654U,
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0xc5a92679U, 0xc1683bceU, 0xcc2b1d17U, 0xc8ea00a0U,
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0xd6ad50a5U, 0xd26c4d12U, 0xdf2f6bcbU, 0xdbee767cU,
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0xe3a1cbc1U, 0xe760d676U, 0xea23f0afU, 0xeee2ed18U,
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0xf0a5bd1dU, 0xf464a0aaU, 0xf9278673U, 0xfde69bc4U,
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0x89b8fd09U, 0x8d79e0beU, 0x803ac667U, 0x84fbdbd0U,
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0x9abc8bd5U, 0x9e7d9662U, 0x933eb0bbU, 0x97ffad0cU,
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0xafb010b1U, 0xab710d06U, 0xa6322bdfU, 0xa2f33668U,
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0xbcb4666dU, 0xb8757bdaU, 0xb5365d03U, 0xb1f740b4U,
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};
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for (size_t i=0; i < data_len; i++) {
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crc = table[(*data ^ (unsigned char)(crc >> 24)) & 0xFF] ^ (crc << 8);
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data++;
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}
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return crc;
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}
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// Strangely, the PRS1 CRC32 appears to consider every byte a 32-bit wchar_t.
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// Nothing like trying a bunch of encodings and CRC32 variants on PROP.TXT files
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// until you find a winner.
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static crc32_t CRC32wchar(const unsigned char *data, size_t data_len, crc32_t crc=0xffffffffU)
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{
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for (size_t i=0; i < data_len; i++) {
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static unsigned char wch[4] = { 0, 0, 0, 0 };
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wch[3] = *data++;
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crc = CRC32(wch, 4, crc);
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}
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return crc;
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}
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QString ts(qint64 msecs)
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{
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// TODO: make this UTC so that tests don't vary by where they're run
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@ -3014,338 +2868,6 @@ QList<PRS1DataChunk *> PRS1Loader::ParseFile(const QString & path)
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}
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PRS1DataChunk::PRS1DataChunk(RawDataDevice & f, PRS1Loader* in_loader) : loader(in_loader)
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{
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m_path = f.name();
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}
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PRS1DataChunk::~PRS1DataChunk()
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{
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for (int i=0; i < m_parsedData.count(); i++) {
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PRS1ParsedEvent* e = m_parsedData.at(i);
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delete e;
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}
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}
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PRS1DataChunk* PRS1DataChunk::ParseNext(RawDataDevice & f, PRS1Loader* loader)
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{
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PRS1DataChunk* out_chunk = nullptr;
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PRS1DataChunk* chunk = new PRS1DataChunk(f, loader);
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do {
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// Parse the header and calculate its checksum.
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bool ok = chunk->ReadHeader(f);
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if (!ok) {
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break;
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}
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// Make sure the calculated checksum matches the stored checksum.
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if (chunk->calcChecksum != chunk->storedChecksum) {
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qWarning() << chunk->m_path << "header checksum calc" << chunk->calcChecksum << "!= stored" << chunk->storedChecksum;
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break;
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}
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// Read the block's data and calculate the block CRC.
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ok = chunk->ReadData(f);
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if (!ok) {
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break;
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}
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// Make sure the calculated CRC over the entire chunk (header and data) matches the stored CRC.
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if (chunk->calcCrc != chunk->storedCrc) {
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// Corrupt data block, warn about it.
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qWarning() << chunk->m_path << "@" << chunk->m_filepos << "block CRC calc" << hex << chunk->calcCrc << "!= stored" << hex << chunk->storedCrc;
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// TODO: When this happens, it's usually because the chunk was truncated and another chunk header
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// exists within the blockSize bytes. In theory it should be possible to rewing and resync by
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// looking for another chunk header with the same fileVersion, htype, family, familyVersion, and
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// ext (blockSize and other fields could vary).
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//
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// But this is quite rare, so for now we bail on the rest of the file.
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break;
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}
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// Only return the chunk if it has passed all tests above.
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out_chunk = chunk;
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} while (false);
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if (out_chunk == nullptr) delete chunk;
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return out_chunk;
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}
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bool PRS1DataChunk::ReadHeader(RawDataDevice & f)
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{
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bool ok = false;
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do {
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// Read common header fields.
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this->m_filepos = f.pos();
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this->m_header = f.read(15);
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if (this->m_header.size() != 15) {
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if (this->m_header.size() == 0) {
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qWarning() << this->m_path << "empty, skipping";
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} else {
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qWarning() << this->m_path << "file too short?";
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}
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break;
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}
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unsigned char * header = (unsigned char *)this->m_header.data();
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this->fileVersion = header[0]; // Correlates to DataFileVersion in PROP[erties].TXT, only 2 or 3 has ever been observed
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this->blockSize = (header[2] << 8) | header[1];
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this->htype = header[3]; // 00 = normal, 01=waveform
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this->family = header[4];
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this->familyVersion = header[5];
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this->ext = header[6];
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this->sessionid = (header[10] << 24) | (header[9] << 16) | (header[8] << 8) | header[7];
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this->timestamp = (header[14] << 24) | (header[13] << 16) | (header[12] << 8) | header[11];
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// Do a few early sanity checks before any variable-length header data.
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if (this->blockSize == 0) {
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qWarning() << this->m_path << "@" << hex << this->m_filepos << "blocksize 0, skipping remainder of file";
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break;
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}
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if (this->fileVersion < 2 || this->fileVersion > 3) {
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if (this->m_filepos > 0) {
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qWarning() << this->m_path << "@" << hex << this->m_filepos << "corrupt PRS1 header, skipping remainder of file";
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} else {
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qWarning() << this->m_path << "unsupported PRS1 header version" << this->fileVersion;
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}
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break;
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}
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if (this->htype != PRS1_HTYPE_NORMAL && this->htype != PRS1_HTYPE_INTERVAL) {
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qWarning() << this->m_path << "unexpected htype:" << this->htype;
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break;
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}
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// Read format-specific variable-length header data.
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bool hdr_ok = false;
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if (this->htype != PRS1_HTYPE_INTERVAL) { // Not just waveforms: the 1160P uses this for its .002 events file.
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// Not a waveform/interval chunk
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switch (this->fileVersion) {
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case 2:
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hdr_ok = ReadNormalHeaderV2(f);
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break;
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case 3:
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hdr_ok = ReadNormalHeaderV3(f);
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break;
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default:
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//hdr_ok remains false, warning is above
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break;
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}
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} else {
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// Waveform/interval chunk
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hdr_ok = ReadWaveformHeader(f);
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}
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||||
if (!hdr_ok) {
|
||||
break;
|
||||
}
|
||||
|
||||
// The 8bit checksum comes at the end.
|
||||
QByteArray checksum = f.read(1);
|
||||
if (checksum.size() < 1) {
|
||||
qWarning() << this->m_path << "read error header checksum";
|
||||
break;
|
||||
}
|
||||
this->storedChecksum = checksum.data()[0];
|
||||
|
||||
// Calculate 8bit additive header checksum.
|
||||
header = (unsigned char *)this->m_header.data(); // important because its memory location could move
|
||||
int header_size = this->m_header.size();
|
||||
quint8 achk=0;
|
||||
for (int i=0; i < header_size; i++) {
|
||||
achk += header[i];
|
||||
}
|
||||
this->calcChecksum = achk;
|
||||
|
||||
// Append the stored checksum to the raw data *after* calculating the checksum on the preceding data.
|
||||
this->m_header.append(checksum);
|
||||
|
||||
ok = true;
|
||||
} while (false);
|
||||
|
||||
return ok;
|
||||
}
|
||||
|
||||
|
||||
bool PRS1DataChunk::ReadNormalHeaderV2(RawDataDevice & /*f*/)
|
||||
{
|
||||
this->m_headerblock = QByteArray();
|
||||
return true; // always OK
|
||||
}
|
||||
|
||||
|
||||
bool PRS1DataChunk::ReadNormalHeaderV3(RawDataDevice & f)
|
||||
{
|
||||
bool ok = false;
|
||||
unsigned char * header;
|
||||
QByteArray headerB2;
|
||||
|
||||
// This is a new machine, byte 15 is header data block length
|
||||
// followed by variable, data byte pairs
|
||||
do {
|
||||
QByteArray extra = f.read(1);
|
||||
if (extra.size() < 1) {
|
||||
qWarning() << this->m_path << "read error extended header";
|
||||
break;
|
||||
}
|
||||
this->m_header.append(extra);
|
||||
header = (unsigned char *)this->m_header.data();
|
||||
|
||||
int hdb_len = header[15];
|
||||
int hdb_size = hdb_len * 2;
|
||||
|
||||
headerB2 = f.read(hdb_size);
|
||||
if (headerB2.size() != hdb_size) {
|
||||
qWarning() << this->m_path << "read error in extended header";
|
||||
break;
|
||||
}
|
||||
this->m_headerblock = headerB2;
|
||||
|
||||
this->m_header.append(headerB2);
|
||||
header = (unsigned char *)this->m_header.data();
|
||||
const unsigned char * hd = (unsigned char *)headerB2.constData();
|
||||
int pos = 0;
|
||||
int recs = header[15];
|
||||
for (int i=0; i<recs; i++) {
|
||||
this->hblock[hd[pos]] = hd[pos+1];
|
||||
pos += 2;
|
||||
}
|
||||
|
||||
ok = true;
|
||||
} while (false);
|
||||
|
||||
return ok;
|
||||
}
|
||||
|
||||
|
||||
bool PRS1DataChunk::ReadWaveformHeader(RawDataDevice & f)
|
||||
{
|
||||
bool ok = false;
|
||||
unsigned char * header;
|
||||
do {
|
||||
// Read the fixed-length waveform header.
|
||||
QByteArray extra = f.read(4);
|
||||
if (extra.size() != 4) {
|
||||
qWarning() << this->m_path << "read error in waveform header";
|
||||
break;
|
||||
}
|
||||
this->m_header.append(extra);
|
||||
header = (unsigned char *)this->m_header.data();
|
||||
|
||||
// Parse the fixed-length portion.
|
||||
this->interval_count = header[0x0f] | header[0x10] << 8;
|
||||
this->interval_seconds = header[0x11]; // not always 1 after all
|
||||
this->duration = this->interval_count * this->interval_seconds; // ??? the last entry doesn't always seem to be a full interval?
|
||||
quint8 wvfm_signals = header[0x12];
|
||||
|
||||
// Read the variable-length data + trailing byte.
|
||||
int ws_size = (this->fileVersion == 3) ? 4 : 3;
|
||||
int sbsize = wvfm_signals * ws_size + 1;
|
||||
|
||||
extra = f.read(sbsize);
|
||||
if (extra.size() != sbsize) {
|
||||
qWarning() << this->m_path << "read error in waveform header 2";
|
||||
break;
|
||||
}
|
||||
this->m_header.append(extra);
|
||||
header = (unsigned char *)this->m_header.data();
|
||||
|
||||
// Parse the variable-length waveform information.
|
||||
// TODO: move these checks into the parser, after the header checksum has been verified
|
||||
// For now just skip them for the one known sample with a bad checksum.
|
||||
if (this->sessionid == 268962649) return true;
|
||||
|
||||
int pos = 0x13;
|
||||
for (int i = 0; i < wvfm_signals; ++i) {
|
||||
quint8 kind = header[pos];
|
||||
CHECK_VALUE(kind, i); // always seems to range from 0...wvfm_signals-1, alert if not
|
||||
quint16 interleave = header[pos + 1] | header[pos + 2] << 8; // samples per interval
|
||||
if (this->fileVersion == 2) {
|
||||
this->waveformInfo.push_back(PRS1Waveform(interleave, kind));
|
||||
pos += 3;
|
||||
} else if (this->fileVersion == 3) {
|
||||
int always_8 = header[pos + 3]; // sample size in bits?
|
||||
CHECK_VALUE(always_8, 8);
|
||||
this->waveformInfo.push_back(PRS1Waveform(interleave, kind));
|
||||
pos += 4;
|
||||
}
|
||||
}
|
||||
|
||||
// And the trailing byte, whatever it is.
|
||||
int always_0 = header[pos];
|
||||
CHECK_VALUE(always_0, 0);
|
||||
|
||||
ok = true;
|
||||
} while (false);
|
||||
|
||||
return ok;
|
||||
}
|
||||
|
||||
|
||||
bool PRS1DataChunk::ReadData(RawDataDevice & f)
|
||||
{
|
||||
bool ok = false;
|
||||
do {
|
||||
// Read data block
|
||||
int data_size = this->blockSize - this->m_header.size();
|
||||
if (data_size < 0) {
|
||||
qWarning() << this->m_path << "chunk size smaller than header";
|
||||
break;
|
||||
}
|
||||
this->m_data = f.read(data_size);
|
||||
if (this->m_data.size() < data_size) {
|
||||
qWarning() << this->m_path << "less data in file than specified in header";
|
||||
break;
|
||||
}
|
||||
|
||||
// Extract the stored CRC from the data buffer and calculate the current CRC.
|
||||
if (this->fileVersion==3) {
|
||||
// The last 4 bytes contain a CRC32 checksum of the data.
|
||||
if (!ExtractStoredCrc(4)) {
|
||||
break;
|
||||
}
|
||||
this->calcCrc = CRC32wchar((unsigned char *)this->m_data.data(), this->m_data.size());
|
||||
} else {
|
||||
// The last 2 bytes contain a CRC16 checksum of the data.
|
||||
if (!ExtractStoredCrc(2)) {
|
||||
break;
|
||||
}
|
||||
this->calcCrc = CRC16((unsigned char *)this->m_data.data(), this->m_data.size());
|
||||
}
|
||||
|
||||
ok = true;
|
||||
} while (false);
|
||||
|
||||
return ok;
|
||||
}
|
||||
|
||||
|
||||
bool PRS1DataChunk::ExtractStoredCrc(int size)
|
||||
{
|
||||
// Make sure there's enough data for the CRC.
|
||||
int offset = this->m_data.size() - size;
|
||||
if (offset < 0) {
|
||||
qWarning() << this->m_path << "chunk truncated";
|
||||
return false;
|
||||
}
|
||||
|
||||
// Read the last 16- or 32-bit little-endian integer.
|
||||
quint32 storedCrc = 0;
|
||||
unsigned char* data = (unsigned char*)this->m_data.data();
|
||||
for (int i=0; i < size; i++) {
|
||||
storedCrc |= data[offset+i] << (8*i);
|
||||
}
|
||||
this->storedCrc = storedCrc;
|
||||
|
||||
// Drop the CRC from the data.
|
||||
this->m_data.chop(size);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
bool initialized = false;
|
||||
|
||||
using namespace schema;
|
||||
|
||||
@ -10,7 +10,7 @@
|
||||
|
||||
#include "prs1_parser.h"
|
||||
#include "prs1_loader.h"
|
||||
#include <QDebug>
|
||||
#include "rawdata.h"
|
||||
|
||||
|
||||
const PRS1ParsedEventType PRS1TidalVolumeEvent::TYPE;
|
||||
@ -323,7 +323,7 @@ QMap<QString,QString> PRS1SnoresAtPressureEvent::contents(void)
|
||||
|
||||
//********************************************************************************************
|
||||
// MARK: -
|
||||
// MARK: Chunk parsing
|
||||
// MARK: Parse chunk contents
|
||||
|
||||
bool PRS1DataChunk::ParseCompliance(void)
|
||||
{
|
||||
@ -917,3 +917,489 @@ void PRS1DataChunk::ParseTubingTypeV3(unsigned char type)
|
||||
}
|
||||
this->AddEvent(new PRS1ParsedSettingEvent(PRS1_SETTING_HOSE_DIAMETER, diam));
|
||||
}
|
||||
|
||||
|
||||
//********************************************************************************************
|
||||
// MARK: -
|
||||
// MARK: Parse and verify chunk from stream
|
||||
|
||||
typedef quint16 crc16_t;
|
||||
typedef quint32 crc32_t;
|
||||
static crc16_t CRC16(unsigned char * data, size_t data_len, crc16_t crc=0);
|
||||
static crc32_t CRC32(const unsigned char *data, size_t data_len, crc32_t crc=0xffffffffU);
|
||||
static crc32_t CRC32wchar(const unsigned char *data, size_t data_len, crc32_t crc=0xffffffffU);
|
||||
|
||||
PRS1DataChunk::PRS1DataChunk(RawDataDevice & f, PRS1Loader* in_loader) : loader(in_loader)
|
||||
{
|
||||
m_path = f.name();
|
||||
}
|
||||
|
||||
PRS1DataChunk::~PRS1DataChunk()
|
||||
{
|
||||
for (int i=0; i < m_parsedData.count(); i++) {
|
||||
PRS1ParsedEvent* e = m_parsedData.at(i);
|
||||
delete e;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
PRS1DataChunk* PRS1DataChunk::ParseNext(RawDataDevice & f, PRS1Loader* loader)
|
||||
{
|
||||
PRS1DataChunk* out_chunk = nullptr;
|
||||
PRS1DataChunk* chunk = new PRS1DataChunk(f, loader);
|
||||
|
||||
do {
|
||||
// Parse the header and calculate its checksum.
|
||||
bool ok = chunk->ReadHeader(f);
|
||||
if (!ok) {
|
||||
break;
|
||||
}
|
||||
|
||||
// Make sure the calculated checksum matches the stored checksum.
|
||||
if (chunk->calcChecksum != chunk->storedChecksum) {
|
||||
qWarning() << chunk->m_path << "header checksum calc" << chunk->calcChecksum << "!= stored" << chunk->storedChecksum;
|
||||
break;
|
||||
}
|
||||
|
||||
// Read the block's data and calculate the block CRC.
|
||||
ok = chunk->ReadData(f);
|
||||
if (!ok) {
|
||||
break;
|
||||
}
|
||||
|
||||
// Make sure the calculated CRC over the entire chunk (header and data) matches the stored CRC.
|
||||
if (chunk->calcCrc != chunk->storedCrc) {
|
||||
// Corrupt data block, warn about it.
|
||||
qWarning() << chunk->m_path << "@" << chunk->m_filepos << "block CRC calc" << hex << chunk->calcCrc << "!= stored" << hex << chunk->storedCrc;
|
||||
|
||||
// TODO: When this happens, it's usually because the chunk was truncated and another chunk header
|
||||
// exists within the blockSize bytes. In theory it should be possible to rewing and resync by
|
||||
// looking for another chunk header with the same fileVersion, htype, family, familyVersion, and
|
||||
// ext (blockSize and other fields could vary).
|
||||
//
|
||||
// But this is quite rare, so for now we bail on the rest of the file.
|
||||
break;
|
||||
}
|
||||
|
||||
// Only return the chunk if it has passed all tests above.
|
||||
out_chunk = chunk;
|
||||
} while (false);
|
||||
|
||||
if (out_chunk == nullptr) delete chunk;
|
||||
return out_chunk;
|
||||
}
|
||||
|
||||
|
||||
bool PRS1DataChunk::ReadHeader(RawDataDevice & f)
|
||||
{
|
||||
bool ok = false;
|
||||
do {
|
||||
// Read common header fields.
|
||||
this->m_filepos = f.pos();
|
||||
this->m_header = f.read(15);
|
||||
if (this->m_header.size() != 15) {
|
||||
if (this->m_header.size() == 0) {
|
||||
qWarning() << this->m_path << "empty, skipping";
|
||||
} else {
|
||||
qWarning() << this->m_path << "file too short?";
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
unsigned char * header = (unsigned char *)this->m_header.data();
|
||||
this->fileVersion = header[0]; // Correlates to DataFileVersion in PROP[erties].TXT, only 2 or 3 has ever been observed
|
||||
this->blockSize = (header[2] << 8) | header[1];
|
||||
this->htype = header[3]; // 00 = normal, 01=waveform
|
||||
this->family = header[4];
|
||||
this->familyVersion = header[5];
|
||||
this->ext = header[6];
|
||||
this->sessionid = (header[10] << 24) | (header[9] << 16) | (header[8] << 8) | header[7];
|
||||
this->timestamp = (header[14] << 24) | (header[13] << 16) | (header[12] << 8) | header[11];
|
||||
|
||||
// Do a few early sanity checks before any variable-length header data.
|
||||
if (this->blockSize == 0) {
|
||||
qWarning() << this->m_path << "@" << hex << this->m_filepos << "blocksize 0, skipping remainder of file";
|
||||
break;
|
||||
}
|
||||
if (this->fileVersion < 2 || this->fileVersion > 3) {
|
||||
if (this->m_filepos > 0) {
|
||||
qWarning() << this->m_path << "@" << hex << this->m_filepos << "corrupt PRS1 header, skipping remainder of file";
|
||||
} else {
|
||||
qWarning() << this->m_path << "unsupported PRS1 header version" << this->fileVersion;
|
||||
}
|
||||
break;
|
||||
}
|
||||
if (this->htype != PRS1_HTYPE_NORMAL && this->htype != PRS1_HTYPE_INTERVAL) {
|
||||
qWarning() << this->m_path << "unexpected htype:" << this->htype;
|
||||
break;
|
||||
}
|
||||
|
||||
// Read format-specific variable-length header data.
|
||||
bool hdr_ok = false;
|
||||
if (this->htype != PRS1_HTYPE_INTERVAL) { // Not just waveforms: the 1160P uses this for its .002 events file.
|
||||
// Not a waveform/interval chunk
|
||||
switch (this->fileVersion) {
|
||||
case 2:
|
||||
hdr_ok = ReadNormalHeaderV2(f);
|
||||
break;
|
||||
case 3:
|
||||
hdr_ok = ReadNormalHeaderV3(f);
|
||||
break;
|
||||
default:
|
||||
//hdr_ok remains false, warning is above
|
||||
break;
|
||||
}
|
||||
} else {
|
||||
// Waveform/interval chunk
|
||||
hdr_ok = ReadWaveformHeader(f);
|
||||
}
|
||||
if (!hdr_ok) {
|
||||
break;
|
||||
}
|
||||
|
||||
// The 8bit checksum comes at the end.
|
||||
QByteArray checksum = f.read(1);
|
||||
if (checksum.size() < 1) {
|
||||
qWarning() << this->m_path << "read error header checksum";
|
||||
break;
|
||||
}
|
||||
this->storedChecksum = checksum.data()[0];
|
||||
|
||||
// Calculate 8bit additive header checksum.
|
||||
header = (unsigned char *)this->m_header.data(); // important because its memory location could move
|
||||
int header_size = this->m_header.size();
|
||||
quint8 achk=0;
|
||||
for (int i=0; i < header_size; i++) {
|
||||
achk += header[i];
|
||||
}
|
||||
this->calcChecksum = achk;
|
||||
|
||||
// Append the stored checksum to the raw data *after* calculating the checksum on the preceding data.
|
||||
this->m_header.append(checksum);
|
||||
|
||||
ok = true;
|
||||
} while (false);
|
||||
|
||||
return ok;
|
||||
}
|
||||
|
||||
|
||||
bool PRS1DataChunk::ReadNormalHeaderV2(RawDataDevice & /*f*/)
|
||||
{
|
||||
this->m_headerblock = QByteArray();
|
||||
return true; // always OK
|
||||
}
|
||||
|
||||
|
||||
bool PRS1DataChunk::ReadNormalHeaderV3(RawDataDevice & f)
|
||||
{
|
||||
bool ok = false;
|
||||
unsigned char * header;
|
||||
QByteArray headerB2;
|
||||
|
||||
// This is a new machine, byte 15 is header data block length
|
||||
// followed by variable, data byte pairs
|
||||
do {
|
||||
QByteArray extra = f.read(1);
|
||||
if (extra.size() < 1) {
|
||||
qWarning() << this->m_path << "read error extended header";
|
||||
break;
|
||||
}
|
||||
this->m_header.append(extra);
|
||||
header = (unsigned char *)this->m_header.data();
|
||||
|
||||
int hdb_len = header[15];
|
||||
int hdb_size = hdb_len * 2;
|
||||
|
||||
headerB2 = f.read(hdb_size);
|
||||
if (headerB2.size() != hdb_size) {
|
||||
qWarning() << this->m_path << "read error in extended header";
|
||||
break;
|
||||
}
|
||||
this->m_headerblock = headerB2;
|
||||
|
||||
this->m_header.append(headerB2);
|
||||
header = (unsigned char *)this->m_header.data();
|
||||
const unsigned char * hd = (unsigned char *)headerB2.constData();
|
||||
int pos = 0;
|
||||
int recs = header[15];
|
||||
for (int i=0; i<recs; i++) {
|
||||
this->hblock[hd[pos]] = hd[pos+1];
|
||||
pos += 2;
|
||||
}
|
||||
|
||||
ok = true;
|
||||
} while (false);
|
||||
|
||||
return ok;
|
||||
}
|
||||
|
||||
|
||||
bool PRS1DataChunk::ReadWaveformHeader(RawDataDevice & f)
|
||||
{
|
||||
bool ok = false;
|
||||
unsigned char * header;
|
||||
do {
|
||||
// Read the fixed-length waveform header.
|
||||
QByteArray extra = f.read(4);
|
||||
if (extra.size() != 4) {
|
||||
qWarning() << this->m_path << "read error in waveform header";
|
||||
break;
|
||||
}
|
||||
this->m_header.append(extra);
|
||||
header = (unsigned char *)this->m_header.data();
|
||||
|
||||
// Parse the fixed-length portion.
|
||||
this->interval_count = header[0x0f] | header[0x10] << 8;
|
||||
this->interval_seconds = header[0x11]; // not always 1 after all
|
||||
this->duration = this->interval_count * this->interval_seconds; // ??? the last entry doesn't always seem to be a full interval?
|
||||
quint8 wvfm_signals = header[0x12];
|
||||
|
||||
// Read the variable-length data + trailing byte.
|
||||
int ws_size = (this->fileVersion == 3) ? 4 : 3;
|
||||
int sbsize = wvfm_signals * ws_size + 1;
|
||||
|
||||
extra = f.read(sbsize);
|
||||
if (extra.size() != sbsize) {
|
||||
qWarning() << this->m_path << "read error in waveform header 2";
|
||||
break;
|
||||
}
|
||||
this->m_header.append(extra);
|
||||
header = (unsigned char *)this->m_header.data();
|
||||
|
||||
// Parse the variable-length waveform information.
|
||||
// TODO: move these checks into the parser, after the header checksum has been verified
|
||||
// For now just skip them for the one known sample with a bad checksum.
|
||||
if (this->sessionid == 268962649) return true;
|
||||
|
||||
int pos = 0x13;
|
||||
for (int i = 0; i < wvfm_signals; ++i) {
|
||||
quint8 kind = header[pos];
|
||||
CHECK_VALUE(kind, i); // always seems to range from 0...wvfm_signals-1, alert if not
|
||||
quint16 interleave = header[pos + 1] | header[pos + 2] << 8; // samples per interval
|
||||
if (this->fileVersion == 2) {
|
||||
this->waveformInfo.push_back(PRS1Waveform(interleave, kind));
|
||||
pos += 3;
|
||||
} else if (this->fileVersion == 3) {
|
||||
int always_8 = header[pos + 3]; // sample size in bits?
|
||||
CHECK_VALUE(always_8, 8);
|
||||
this->waveformInfo.push_back(PRS1Waveform(interleave, kind));
|
||||
pos += 4;
|
||||
}
|
||||
}
|
||||
|
||||
// And the trailing byte, whatever it is.
|
||||
int always_0 = header[pos];
|
||||
CHECK_VALUE(always_0, 0);
|
||||
|
||||
ok = true;
|
||||
} while (false);
|
||||
|
||||
return ok;
|
||||
}
|
||||
|
||||
|
||||
bool PRS1DataChunk::ReadData(RawDataDevice & f)
|
||||
{
|
||||
bool ok = false;
|
||||
do {
|
||||
// Read data block
|
||||
int data_size = this->blockSize - this->m_header.size();
|
||||
if (data_size < 0) {
|
||||
qWarning() << this->m_path << "chunk size smaller than header";
|
||||
break;
|
||||
}
|
||||
this->m_data = f.read(data_size);
|
||||
if (this->m_data.size() < data_size) {
|
||||
qWarning() << this->m_path << "less data in file than specified in header";
|
||||
break;
|
||||
}
|
||||
|
||||
// Extract the stored CRC from the data buffer and calculate the current CRC.
|
||||
if (this->fileVersion==3) {
|
||||
// The last 4 bytes contain a CRC32 checksum of the data.
|
||||
if (!ExtractStoredCrc(4)) {
|
||||
break;
|
||||
}
|
||||
this->calcCrc = CRC32wchar((unsigned char *)this->m_data.data(), this->m_data.size());
|
||||
} else {
|
||||
// The last 2 bytes contain a CRC16 checksum of the data.
|
||||
if (!ExtractStoredCrc(2)) {
|
||||
break;
|
||||
}
|
||||
this->calcCrc = CRC16((unsigned char *)this->m_data.data(), this->m_data.size());
|
||||
}
|
||||
|
||||
ok = true;
|
||||
} while (false);
|
||||
|
||||
return ok;
|
||||
}
|
||||
|
||||
|
||||
bool PRS1DataChunk::ExtractStoredCrc(int size)
|
||||
{
|
||||
// Make sure there's enough data for the CRC.
|
||||
int offset = this->m_data.size() - size;
|
||||
if (offset < 0) {
|
||||
qWarning() << this->m_path << "chunk truncated";
|
||||
return false;
|
||||
}
|
||||
|
||||
// Read the last 16- or 32-bit little-endian integer.
|
||||
quint32 storedCrc = 0;
|
||||
unsigned char* data = (unsigned char*)this->m_data.data();
|
||||
for (int i=0; i < size; i++) {
|
||||
storedCrc |= data[offset+i] << (8*i);
|
||||
}
|
||||
this->storedCrc = storedCrc;
|
||||
|
||||
// Drop the CRC from the data.
|
||||
this->m_data.chop(size);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
// CRC-16/KERMIT, polynomial: 0x11021, bit reverse algorithm
|
||||
// Table generated by crcmod (crc-kermit)
|
||||
|
||||
typedef quint16 crc16_t;
|
||||
static crc16_t CRC16(unsigned char * data, size_t data_len, crc16_t crc)
|
||||
{
|
||||
static const crc16_t table[256] = {
|
||||
0x0000U, 0x1189U, 0x2312U, 0x329bU, 0x4624U, 0x57adU, 0x6536U, 0x74bfU,
|
||||
0x8c48U, 0x9dc1U, 0xaf5aU, 0xbed3U, 0xca6cU, 0xdbe5U, 0xe97eU, 0xf8f7U,
|
||||
0x1081U, 0x0108U, 0x3393U, 0x221aU, 0x56a5U, 0x472cU, 0x75b7U, 0x643eU,
|
||||
0x9cc9U, 0x8d40U, 0xbfdbU, 0xae52U, 0xdaedU, 0xcb64U, 0xf9ffU, 0xe876U,
|
||||
0x2102U, 0x308bU, 0x0210U, 0x1399U, 0x6726U, 0x76afU, 0x4434U, 0x55bdU,
|
||||
0xad4aU, 0xbcc3U, 0x8e58U, 0x9fd1U, 0xeb6eU, 0xfae7U, 0xc87cU, 0xd9f5U,
|
||||
0x3183U, 0x200aU, 0x1291U, 0x0318U, 0x77a7U, 0x662eU, 0x54b5U, 0x453cU,
|
||||
0xbdcbU, 0xac42U, 0x9ed9U, 0x8f50U, 0xfbefU, 0xea66U, 0xd8fdU, 0xc974U,
|
||||
0x4204U, 0x538dU, 0x6116U, 0x709fU, 0x0420U, 0x15a9U, 0x2732U, 0x36bbU,
|
||||
0xce4cU, 0xdfc5U, 0xed5eU, 0xfcd7U, 0x8868U, 0x99e1U, 0xab7aU, 0xbaf3U,
|
||||
0x5285U, 0x430cU, 0x7197U, 0x601eU, 0x14a1U, 0x0528U, 0x37b3U, 0x263aU,
|
||||
0xdecdU, 0xcf44U, 0xfddfU, 0xec56U, 0x98e9U, 0x8960U, 0xbbfbU, 0xaa72U,
|
||||
0x6306U, 0x728fU, 0x4014U, 0x519dU, 0x2522U, 0x34abU, 0x0630U, 0x17b9U,
|
||||
0xef4eU, 0xfec7U, 0xcc5cU, 0xddd5U, 0xa96aU, 0xb8e3U, 0x8a78U, 0x9bf1U,
|
||||
0x7387U, 0x620eU, 0x5095U, 0x411cU, 0x35a3U, 0x242aU, 0x16b1U, 0x0738U,
|
||||
0xffcfU, 0xee46U, 0xdcddU, 0xcd54U, 0xb9ebU, 0xa862U, 0x9af9U, 0x8b70U,
|
||||
0x8408U, 0x9581U, 0xa71aU, 0xb693U, 0xc22cU, 0xd3a5U, 0xe13eU, 0xf0b7U,
|
||||
0x0840U, 0x19c9U, 0x2b52U, 0x3adbU, 0x4e64U, 0x5fedU, 0x6d76U, 0x7cffU,
|
||||
0x9489U, 0x8500U, 0xb79bU, 0xa612U, 0xd2adU, 0xc324U, 0xf1bfU, 0xe036U,
|
||||
0x18c1U, 0x0948U, 0x3bd3U, 0x2a5aU, 0x5ee5U, 0x4f6cU, 0x7df7U, 0x6c7eU,
|
||||
0xa50aU, 0xb483U, 0x8618U, 0x9791U, 0xe32eU, 0xf2a7U, 0xc03cU, 0xd1b5U,
|
||||
0x2942U, 0x38cbU, 0x0a50U, 0x1bd9U, 0x6f66U, 0x7eefU, 0x4c74U, 0x5dfdU,
|
||||
0xb58bU, 0xa402U, 0x9699U, 0x8710U, 0xf3afU, 0xe226U, 0xd0bdU, 0xc134U,
|
||||
0x39c3U, 0x284aU, 0x1ad1U, 0x0b58U, 0x7fe7U, 0x6e6eU, 0x5cf5U, 0x4d7cU,
|
||||
0xc60cU, 0xd785U, 0xe51eU, 0xf497U, 0x8028U, 0x91a1U, 0xa33aU, 0xb2b3U,
|
||||
0x4a44U, 0x5bcdU, 0x6956U, 0x78dfU, 0x0c60U, 0x1de9U, 0x2f72U, 0x3efbU,
|
||||
0xd68dU, 0xc704U, 0xf59fU, 0xe416U, 0x90a9U, 0x8120U, 0xb3bbU, 0xa232U,
|
||||
0x5ac5U, 0x4b4cU, 0x79d7U, 0x685eU, 0x1ce1U, 0x0d68U, 0x3ff3U, 0x2e7aU,
|
||||
0xe70eU, 0xf687U, 0xc41cU, 0xd595U, 0xa12aU, 0xb0a3U, 0x8238U, 0x93b1U,
|
||||
0x6b46U, 0x7acfU, 0x4854U, 0x59ddU, 0x2d62U, 0x3cebU, 0x0e70U, 0x1ff9U,
|
||||
0xf78fU, 0xe606U, 0xd49dU, 0xc514U, 0xb1abU, 0xa022U, 0x92b9U, 0x8330U,
|
||||
0x7bc7U, 0x6a4eU, 0x58d5U, 0x495cU, 0x3de3U, 0x2c6aU, 0x1ef1U, 0x0f78U,
|
||||
};
|
||||
|
||||
for (size_t i=0; i < data_len; i++) {
|
||||
crc = table[(*data ^ (unsigned char)crc) & 0xFF] ^ (crc >> 8);
|
||||
data++;
|
||||
}
|
||||
return crc;
|
||||
}
|
||||
|
||||
|
||||
// CRC-32/MPEG-2, polynomial: 0x104C11DB7
|
||||
// Table generated by crcmod (crc-32-mpeg)
|
||||
|
||||
static crc32_t CRC32(const unsigned char *data, size_t data_len, crc32_t crc)
|
||||
{
|
||||
static const crc32_t table[256] = {
|
||||
0x00000000U, 0x04c11db7U, 0x09823b6eU, 0x0d4326d9U,
|
||||
0x130476dcU, 0x17c56b6bU, 0x1a864db2U, 0x1e475005U,
|
||||
0x2608edb8U, 0x22c9f00fU, 0x2f8ad6d6U, 0x2b4bcb61U,
|
||||
0x350c9b64U, 0x31cd86d3U, 0x3c8ea00aU, 0x384fbdbdU,
|
||||
0x4c11db70U, 0x48d0c6c7U, 0x4593e01eU, 0x4152fda9U,
|
||||
0x5f15adacU, 0x5bd4b01bU, 0x569796c2U, 0x52568b75U,
|
||||
0x6a1936c8U, 0x6ed82b7fU, 0x639b0da6U, 0x675a1011U,
|
||||
0x791d4014U, 0x7ddc5da3U, 0x709f7b7aU, 0x745e66cdU,
|
||||
0x9823b6e0U, 0x9ce2ab57U, 0x91a18d8eU, 0x95609039U,
|
||||
0x8b27c03cU, 0x8fe6dd8bU, 0x82a5fb52U, 0x8664e6e5U,
|
||||
0xbe2b5b58U, 0xbaea46efU, 0xb7a96036U, 0xb3687d81U,
|
||||
0xad2f2d84U, 0xa9ee3033U, 0xa4ad16eaU, 0xa06c0b5dU,
|
||||
0xd4326d90U, 0xd0f37027U, 0xddb056feU, 0xd9714b49U,
|
||||
0xc7361b4cU, 0xc3f706fbU, 0xceb42022U, 0xca753d95U,
|
||||
0xf23a8028U, 0xf6fb9d9fU, 0xfbb8bb46U, 0xff79a6f1U,
|
||||
0xe13ef6f4U, 0xe5ffeb43U, 0xe8bccd9aU, 0xec7dd02dU,
|
||||
0x34867077U, 0x30476dc0U, 0x3d044b19U, 0x39c556aeU,
|
||||
0x278206abU, 0x23431b1cU, 0x2e003dc5U, 0x2ac12072U,
|
||||
0x128e9dcfU, 0x164f8078U, 0x1b0ca6a1U, 0x1fcdbb16U,
|
||||
0x018aeb13U, 0x054bf6a4U, 0x0808d07dU, 0x0cc9cdcaU,
|
||||
0x7897ab07U, 0x7c56b6b0U, 0x71159069U, 0x75d48ddeU,
|
||||
0x6b93dddbU, 0x6f52c06cU, 0x6211e6b5U, 0x66d0fb02U,
|
||||
0x5e9f46bfU, 0x5a5e5b08U, 0x571d7dd1U, 0x53dc6066U,
|
||||
0x4d9b3063U, 0x495a2dd4U, 0x44190b0dU, 0x40d816baU,
|
||||
0xaca5c697U, 0xa864db20U, 0xa527fdf9U, 0xa1e6e04eU,
|
||||
0xbfa1b04bU, 0xbb60adfcU, 0xb6238b25U, 0xb2e29692U,
|
||||
0x8aad2b2fU, 0x8e6c3698U, 0x832f1041U, 0x87ee0df6U,
|
||||
0x99a95df3U, 0x9d684044U, 0x902b669dU, 0x94ea7b2aU,
|
||||
0xe0b41de7U, 0xe4750050U, 0xe9362689U, 0xedf73b3eU,
|
||||
0xf3b06b3bU, 0xf771768cU, 0xfa325055U, 0xfef34de2U,
|
||||
0xc6bcf05fU, 0xc27dede8U, 0xcf3ecb31U, 0xcbffd686U,
|
||||
0xd5b88683U, 0xd1799b34U, 0xdc3abdedU, 0xd8fba05aU,
|
||||
0x690ce0eeU, 0x6dcdfd59U, 0x608edb80U, 0x644fc637U,
|
||||
0x7a089632U, 0x7ec98b85U, 0x738aad5cU, 0x774bb0ebU,
|
||||
0x4f040d56U, 0x4bc510e1U, 0x46863638U, 0x42472b8fU,
|
||||
0x5c007b8aU, 0x58c1663dU, 0x558240e4U, 0x51435d53U,
|
||||
0x251d3b9eU, 0x21dc2629U, 0x2c9f00f0U, 0x285e1d47U,
|
||||
0x36194d42U, 0x32d850f5U, 0x3f9b762cU, 0x3b5a6b9bU,
|
||||
0x0315d626U, 0x07d4cb91U, 0x0a97ed48U, 0x0e56f0ffU,
|
||||
0x1011a0faU, 0x14d0bd4dU, 0x19939b94U, 0x1d528623U,
|
||||
0xf12f560eU, 0xf5ee4bb9U, 0xf8ad6d60U, 0xfc6c70d7U,
|
||||
0xe22b20d2U, 0xe6ea3d65U, 0xeba91bbcU, 0xef68060bU,
|
||||
0xd727bbb6U, 0xd3e6a601U, 0xdea580d8U, 0xda649d6fU,
|
||||
0xc423cd6aU, 0xc0e2d0ddU, 0xcda1f604U, 0xc960ebb3U,
|
||||
0xbd3e8d7eU, 0xb9ff90c9U, 0xb4bcb610U, 0xb07daba7U,
|
||||
0xae3afba2U, 0xaafbe615U, 0xa7b8c0ccU, 0xa379dd7bU,
|
||||
0x9b3660c6U, 0x9ff77d71U, 0x92b45ba8U, 0x9675461fU,
|
||||
0x8832161aU, 0x8cf30badU, 0x81b02d74U, 0x857130c3U,
|
||||
0x5d8a9099U, 0x594b8d2eU, 0x5408abf7U, 0x50c9b640U,
|
||||
0x4e8ee645U, 0x4a4ffbf2U, 0x470cdd2bU, 0x43cdc09cU,
|
||||
0x7b827d21U, 0x7f436096U, 0x7200464fU, 0x76c15bf8U,
|
||||
0x68860bfdU, 0x6c47164aU, 0x61043093U, 0x65c52d24U,
|
||||
0x119b4be9U, 0x155a565eU, 0x18197087U, 0x1cd86d30U,
|
||||
0x029f3d35U, 0x065e2082U, 0x0b1d065bU, 0x0fdc1becU,
|
||||
0x3793a651U, 0x3352bbe6U, 0x3e119d3fU, 0x3ad08088U,
|
||||
0x2497d08dU, 0x2056cd3aU, 0x2d15ebe3U, 0x29d4f654U,
|
||||
0xc5a92679U, 0xc1683bceU, 0xcc2b1d17U, 0xc8ea00a0U,
|
||||
0xd6ad50a5U, 0xd26c4d12U, 0xdf2f6bcbU, 0xdbee767cU,
|
||||
0xe3a1cbc1U, 0xe760d676U, 0xea23f0afU, 0xeee2ed18U,
|
||||
0xf0a5bd1dU, 0xf464a0aaU, 0xf9278673U, 0xfde69bc4U,
|
||||
0x89b8fd09U, 0x8d79e0beU, 0x803ac667U, 0x84fbdbd0U,
|
||||
0x9abc8bd5U, 0x9e7d9662U, 0x933eb0bbU, 0x97ffad0cU,
|
||||
0xafb010b1U, 0xab710d06U, 0xa6322bdfU, 0xa2f33668U,
|
||||
0xbcb4666dU, 0xb8757bdaU, 0xb5365d03U, 0xb1f740b4U,
|
||||
};
|
||||
|
||||
for (size_t i=0; i < data_len; i++) {
|
||||
crc = table[(*data ^ (unsigned char)(crc >> 24)) & 0xFF] ^ (crc << 8);
|
||||
data++;
|
||||
}
|
||||
return crc;
|
||||
}
|
||||
|
||||
|
||||
// Strangely, the PRS1 CRC32 appears to consider every byte a 32-bit wchar_t.
|
||||
// Nothing like trying a bunch of encodings and CRC32 variants on PROP.TXT files
|
||||
// until you find a winner.
|
||||
|
||||
static crc32_t CRC32wchar(const unsigned char *data, size_t data_len, crc32_t crc)
|
||||
{
|
||||
for (size_t i=0; i < data_len; i++) {
|
||||
static unsigned char wch[4] = { 0, 0, 0, 0 };
|
||||
wch[3] = *data++;
|
||||
crc = CRC32(wch, 4, crc);
|
||||
}
|
||||
return crc;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user