add ota algorithm for device
1. effective "Differential Upgrade" patch algorithm with high compression rate 2. effective recovery algorithm support recovery firmware in blocks which has low memory consumption and wear-leveling strategies, especially suitable for embeded devices with low RAM. 3. add sample ota bootloader project, see: board\TencentOS_tiny_EVB_MX_Plus\KEIL\ota\ota_bootloader_recovery 4. add sample application project for download firmware through http, see: board\TencentOS_tiny_EVB_MX_Plus\KEIL\ota\ota_application_download_through_http 5. add sample application project for download firmware through qcloud explorer console, see: board\TencentOS_tiny_EVB_MX_Plus\KEIL\ota\ota_application_download_through_qcloud_iot_explorer 6. an OTA markdown document is pending
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daishengdong
131
components/ota/common/lzma/3rdparty/LzmaLib.h
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components/ota/common/lzma/3rdparty/LzmaLib.h
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/* LzmaLib.h -- LZMA library interface
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2013-01-18 : Igor Pavlov : Public domain */
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#ifndef __LZMA_LIB_H
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#define __LZMA_LIB_H
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#include "7zTypes.h"
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EXTERN_C_BEGIN
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#define MY_STDAPI int MY_STD_CALL
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#define LZMA_PROPS_SIZE 5
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/*
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RAM requirements for LZMA:
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for compression: (dictSize * 11.5 + 6 MB) + state_size
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for decompression: dictSize + state_size
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state_size = (4 + (1.5 << (lc + lp))) KB
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by default (lc=3, lp=0), state_size = 16 KB.
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LZMA properties (5 bytes) format
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Offset Size Description
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0 1 lc, lp and pb in encoded form.
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1 4 dictSize (little endian).
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*/
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/*
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LzmaCompress
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------------
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outPropsSize -
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In: the pointer to the size of outProps buffer; *outPropsSize = LZMA_PROPS_SIZE = 5.
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Out: the pointer to the size of written properties in outProps buffer; *outPropsSize = LZMA_PROPS_SIZE = 5.
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LZMA Encoder will use defult values for any parameter, if it is
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-1 for any from: level, loc, lp, pb, fb, numThreads
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0 for dictSize
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level - compression level: 0 <= level <= 9;
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level dictSize algo fb
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0: 16 KB 0 32
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1: 64 KB 0 32
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2: 256 KB 0 32
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3: 1 MB 0 32
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4: 4 MB 0 32
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5: 16 MB 1 32
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6: 32 MB 1 32
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7+: 64 MB 1 64
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The default value for "level" is 5.
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algo = 0 means fast method
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algo = 1 means normal method
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dictSize - The dictionary size in bytes. The maximum value is
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128 MB = (1 << 27) bytes for 32-bit version
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1 GB = (1 << 30) bytes for 64-bit version
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The default value is 16 MB = (1 << 24) bytes.
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It's recommended to use the dictionary that is larger than 4 KB and
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that can be calculated as (1 << N) or (3 << N) sizes.
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lc - The number of literal context bits (high bits of previous literal).
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It can be in the range from 0 to 8. The default value is 3.
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Sometimes lc=4 gives the gain for big files.
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lp - The number of literal pos bits (low bits of current position for literals).
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It can be in the range from 0 to 4. The default value is 0.
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The lp switch is intended for periodical data when the period is equal to 2^lp.
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For example, for 32-bit (4 bytes) periodical data you can use lp=2. Often it's
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better to set lc=0, if you change lp switch.
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pb - The number of pos bits (low bits of current position).
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It can be in the range from 0 to 4. The default value is 2.
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The pb switch is intended for periodical data when the period is equal 2^pb.
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fb - Word size (the number of fast bytes).
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It can be in the range from 5 to 273. The default value is 32.
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Usually, a big number gives a little bit better compression ratio and
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slower compression process.
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numThreads - The number of thereads. 1 or 2. The default value is 2.
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Fast mode (algo = 0) can use only 1 thread.
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Out:
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destLen - processed output size
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Returns:
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SZ_OK - OK
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SZ_ERROR_MEM - Memory allocation error
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SZ_ERROR_PARAM - Incorrect paramater
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SZ_ERROR_OUTPUT_EOF - output buffer overflow
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SZ_ERROR_THREAD - errors in multithreading functions (only for Mt version)
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*/
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MY_STDAPI LzmaCompress(unsigned char *dest, size_t *destLen, const unsigned char *src, size_t srcLen,
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unsigned char *outProps, size_t *outPropsSize, /* *outPropsSize must be = 5 */
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int level, /* 0 <= level <= 9, default = 5 */
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unsigned dictSize, /* default = (1 << 24) */
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int lc, /* 0 <= lc <= 8, default = 3 */
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int lp, /* 0 <= lp <= 4, default = 0 */
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int pb, /* 0 <= pb <= 4, default = 2 */
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int fb, /* 5 <= fb <= 273, default = 32 */
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int numThreads /* 1 or 2, default = 2 */
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);
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/*
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LzmaUncompress
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--------------
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In:
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dest - output data
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destLen - output data size
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src - input data
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srcLen - input data size
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Out:
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destLen - processed output size
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srcLen - processed input size
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Returns:
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SZ_OK - OK
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SZ_ERROR_DATA - Data error
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SZ_ERROR_MEM - Memory allocation arror
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SZ_ERROR_UNSUPPORTED - Unsupported properties
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SZ_ERROR_INPUT_EOF - it needs more bytes in input buffer (src)
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*/
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MY_STDAPI LzmaUncompress(unsigned char *dest, size_t *destLen, const unsigned char *src, SizeT *srcLen,
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const unsigned char *props, size_t propsSize);
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EXTERN_C_END
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#endif
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