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< div class = "date inPage" > 16 May 2025< / div > < div style = "color: gray;" >
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Read time: 4 minute(s)
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< p class = "- topic/p p" data-ofbid = "d148701e33__20250519091521" > MPP zlib 的功能：利用硬件加速解压 zlib 文件。< / p >
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< section class = "- topic/section section" id = "mpp_zlib_design_and_interface_intro__id9" data-ofbid = "mpp_zlib_design_and_interface_intro__id9" > < h2 class = "- topic/title title sectiontitle" > 接口设计< / h2 >
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< div class = "- topic/div div section" id = "mpp_zlib_design_and_interface_intro__mpp-zlib-uncompressed" >
< strong class = "+ topic/ph hi-d/b ph b" > mpp_zlib_uncompressed< / strong >
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< div class = "table-container" > < table class = "- topic/table table frame-all" id = "mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc" data-ofbid = "mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 1< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > < / span > < / caption > < colgroup > < col / > < col / > < / colgroup > < thead class = "- topic/thead thead" >
< tr class = "- topic/row" >
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< th class = "- topic/entry entry colsep-1 rowsep-1" id = "mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__1" > < p class = "- topic/p p" data-ofbid = "d148701e59__20250519091521" > 函数原型< / p > < / th >
< th class = "- topic/entry entry colsep-0 rowsep-1" id = "mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__2" > < p class = "- topic/p p" data-ofbid = "d148701e63__20250519091521" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > int mpp_zlib_uncompressed(unsigned char
*compressed_data,unsigned int compressed_len， < / div >
< div class = "- topic/div div" > unsigned char *uncompressed_data,unsigned int
uncompressed_len);< / div >
< / div >
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< / p > < / th >
< / tr >
< / thead > < tbody class = "- topic/tbody tbody" >
< tr class = "- topic/row" >
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< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__1" > < p class = "- topic/p p" data-ofbid = "d148701e82__20250519091521" > 功能说明< / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" headers = "mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__2" > < p class = "- topic/p p" data-ofbid = "d148701e86__20250519091521" > 解压 zlib 文件< / p > < / td >
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< / tr >
< tr class = "- topic/row" >
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< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__1" > < p class = "- topic/p p" data-ofbid = "d148701e93__20250519091521" > 参数定义< / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" headers = "mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__2" > < p class = "- topic/p p" data-ofbid = "d148701e97__20250519091521" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > compressed_data - 压缩数据起始地址< / div >
< div class = "- topic/div div" > compressed_len - 压缩数据长度< / div >
< div class = "- topic/div div" > uncompressed_data - 存放解压数据 buffer 的起始地址< / div >
< div class = "- topic/div div" > uncompressed_len - 存放解压数据 buffer 的长度< / div >
< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
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< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__1" > < p class = "- topic/p p" data-ofbid = "d148701e119__20250519091521" > 返回值< / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" headers = "mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__2" > < p class = "- topic/p p" data-ofbid = "d148701e123__20250519091521" > > 0， ； < 0， < / p > < / td >
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< / tr >
< tr class = "- topic/row" >
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< td class = "- topic/entry entry colsep-1 rowsep-0" headers = "mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__1" > < p class = "- topic/p p" data-ofbid = "d148701e130__20250519091521" > 注意事项< / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-0" headers = "mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__2" > < p class = "- topic/p p" data-ofbid = "d148701e134__20250519091521" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > compressed_data - 16 byte 对齐，填充数据后，需要刷 cache< / div >
< div class = "- topic/div div" > compressed_len - 实际有效数据长度< / div >
< div class = "- topic/div div" > uncompressed_data - 8 byte 对齐，获取数据前，先清掉 cache< / div >
< div class = "- topic/div div" > uncompressed_len - 8 byte 对齐，必须大于等于解压数据实际长度< / div >
< / div >
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< / p > < / td >
< / tr >
< / tbody > < / table > < / div >
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< / div >
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< / section >
< section class = "- topic/section section" id = "mpp_zlib_design_and_interface_intro__section_qtn_xl4_f1c" data-ofbid = "mpp_zlib_design_and_interface_intro__section_qtn_xl4_f1c" > < h2 class = "- topic/title title sectiontitle" > 参考 Demo< / h2 >
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< div class = "- topic/p p" data-ofbid = "d148701e163__20250519091521" >
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< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "mpp_zlib_design_and_interface_intro__codeblock_c5x_xl4_f1c" data-ofbid = "mpp_zlib_design_and_interface_intro__codeblock_c5x_xl4_f1c" > #include < span class = "hl-string" > "dfs.h"< / span >
#include < span class = "hl-string" > "unistd.h"< / span >
#include < span class = "hl-string" > "mpp_zlib.h"< / span >
#include < span class = "hl-string" > "mpp_mem.h"< / span >
#include < span class = "hl-string" > "mpp_log.h"< / span >
#include < console.h>
#include < span class = "hl-string" > "aic_core.h"< / span >
< strong class = "hl-keyword" > static< / strong > < strong class = "hl-keyword" > void< / strong > print_help(< strong class = "hl-keyword" > char< / strong > *program)
{
printf(< span class = "hl-string" > "Compile time: %s\n"< / span > , __TIME__);
printf(< span class = "hl-string" > "usage:%s input_file out_file out_put_buffer_len \n"< / span > , program);
printf(< span class = "hl-string" > "note:out_put_buffer_len ≥ out_file_size \n"< / span > );
printf(< span class = "hl-string" > "exsample:%s readme.zlib readme.txt 204800\n"< / span > ,program);
}
< strong class = "hl-keyword" > int< / strong > zlib_test(< strong class = "hl-keyword" > int< / strong > argc,< strong class = "hl-keyword" > char< / strong > **argv)
{
< strong class = "hl-keyword" > int< / strong > ret = < span class = "hl-number" > 0< / span > ;
< strong class = "hl-keyword" > int< / strong > fd_in = < span class = "hl-number" > 0< / span > ;
< strong class = "hl-keyword" > int< / strong > fd_out = < span class = "hl-number" > 0< / span > ;
< strong class = "hl-keyword" > int< / strong > file_len;
< strong class = "hl-keyword" > int< / strong > in_len_align;
< strong class = "hl-keyword" > int< / strong > out_len;
< strong class = "hl-keyword" > int< / strong > out_len_align;
< strong class = "hl-keyword" > int< / strong > r_len=< span class = "hl-number" > 0< / span > ,w_len=< span class = "hl-number" > 0< / span > ;
< strong class = "hl-keyword" > int< / strong > uncompress_len;
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > long< / strong > in_buff = < span class = "hl-number" > 0< / span > ;;
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > long< / strong > in_buff_align;
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > long< / strong > out_buff = < span class = "hl-number" > 0< / span > ;
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > long< / strong > out_buff_align;
< strong class = "hl-keyword" > int< / strong > align;
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > int< / strong > before;
< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > int< / strong > after;
< strong class = "hl-keyword" > if< / strong > (argc != < span class = "hl-number" > 4< / span > ) {
print_help(argv[< span class = "hl-number" > 0< / span > ]);
< strong class = "hl-keyword" > return< / strong > -< span class = "hl-number" > 1< / span > ;
}
fd_in = open(argv[< span class = "hl-number" > 1< / span > ], O_RDONLY);
< strong class = "hl-keyword" > if< / strong > (fd_in < < span class = "hl-number" > 0< / span > ) {
loge(< span class = "hl-string" > "open %s fail\n"< / span > ,argv[< span class = "hl-number" > 1< / span > ]);
< strong class = "hl-keyword" > return< / strong > -< span class = "hl-number" > 1< / span > ;
}
file_len = lseek(fd_in, < span class = "hl-number" > 0< / span > , SEEK_END);
lseek(fd_in, < span class = "hl-number" > 0< / span > , SEEK_SET);
#< span class = "hl-directive" > define< / span > INPUT_BUFFER_ALIGN < span class = "hl-number" > 16< / span >
< strong class = "hl-keyword" > if< / strong > (CACHE_LINE_SIZE > INPUT_BUFFER_ALIGN) {
align = CACHE_LINE_SIZE;
} < strong class = "hl-keyword" > else< / strong > {
align = INPUT_BUFFER_ALIGN;
}
< em class = "hl-comment" > //input buffer len align max of {CACHE_LINE_SIZE,INPUT_BUFFER_ALIGN}< / em >
in_len_align = (file_len+align-< span class = "hl-number" > 1< / span > )/align*align;
in_buff = (< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > long< / strong > )aicos_malloc(MEM_CMA, in_len_align+align-< span class = "hl-number" > 1< / span > );
< strong class = "hl-keyword" > if< / strong > (in_buff == < span class = "hl-number" > 0< / span > ) {
loge(< span class = "hl-string" > "mpp_alloc fail\n"< / span > );
ret = -< span class = "hl-number" > 1< / span > ;
< strong class = "hl-keyword" > goto< / strong > _exit;
}
< em class = "hl-comment" > //input buffer addr align max of {CACHE_LINE_SIZE,INPUT_BUFFER_ALIGN}< / em >
in_buff_align = ((in_buff+align-< span class = "hl-number" > 1< / span > )& (~(align-< span class = "hl-number" > 1< / span > )));
r_len = read(fd_in,(< strong class = "hl-keyword" > void< / strong > *)in_buff_align, file_len);
logd(< span class = "hl-string" > "r_len:%d,in_len:%d\n"< / span > ,r_len,file_len);
< em class = "hl-comment" > //flush cache*< / em >
aicos_dcache_clean_range((< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > long< / strong > *)in_buff_align, (int64_t)in_len_align);
out_len = atoi(argv[< span class = "hl-number" > 3< / span > ]);
< strong class = "hl-keyword" > if< / strong > (out_len < file_len) {
loge(< span class = "hl-string" > "param error :%d\n"< / span > ,out_len);
ret = -< span class = "hl-number" > 1< / span > ;
< strong class = "hl-keyword" > goto< / strong > _exit;
}
< em class = "hl-comment" > // out buffer len align CACHE_LINE_SIZE< / em >
out_len_align = (out_len + CACHE_LINE_SIZE -< span class = "hl-number" > 1< / span > )/CACHE_LINE_SIZE*CACHE_LINE_SIZE;
out_buff = (< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > long< / strong > )aicos_malloc(MEM_CMA, out_len_align+(CACHE_LINE_SIZE -< span class = "hl-number" > 1< / span > ));
< strong class = "hl-keyword" > if< / strong > (out_buff == < span class = "hl-number" > 0< / span > ) {
loge(< span class = "hl-string" > "mpp_alloc fail\n"< / span > );
ret = -< span class = "hl-number" > 1< / span > ;
< strong class = "hl-keyword" > goto< / strong > _exit;
}
< em class = "hl-comment" > //out buffer addr align CACHE_LINE_SIZE< / em >
out_buff_align = ((out_buff+CACHE_LINE_SIZE -< span class = "hl-number" > 1< / span > )& (~(CACHE_LINE_SIZE-< span class = "hl-number" > 1< / span > )));
< em class = "hl-comment" > // uncompressed< / em >
before = aic_get_time_us();
uncompress_len = mpp_zlib_uncompressed((< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > char< / strong > *)in_buff_align, file_len, (< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > char< / strong > *)out_buff_align, out_len_align);
after = aic_get_time_us();
logd(< span class = "hl-string" > "diff:%u\n"< / span > ,after-before);
< strong class = "hl-keyword" > if< / strong > (uncompress_len < < span class = "hl-number" > 0< / span > ) {
loge(< span class = "hl-string" > "mpp_zlib_uncompressed fail\n"< / span > );
ret = -< span class = "hl-number" > 1< / span > ;
< strong class = "hl-keyword" > goto< / strong > _exit;
}
< em class = "hl-comment" > //save uncompressed data< / em >
fd_out = open(argv[< span class = "hl-number" > 2< / span > ], O_RDWR|O_CREAT);
< strong class = "hl-keyword" > if< / strong > (fd_out < < span class = "hl-number" > 0< / span > ) {
loge(< span class = "hl-string" > "open %s fail\n"< / span > ,argv[< span class = "hl-number" > 2< / span > ]);
ret = -< span class = "hl-number" > 1< / span > ;
< strong class = "hl-keyword" > goto< / strong > _exit;
}
< em class = "hl-comment" > // invalid cache< / em >
aicos_dcache_invalid_range((< strong class = "hl-keyword" > unsigned< / strong > < strong class = "hl-keyword" > long< / strong > *)out_buff_align, (int64_t)out_len_align);
w_len = write(fd_out,(< strong class = "hl-keyword" > void< / strong > *)out_buff_align, uncompress_len);
logd(< span class = "hl-string" > "w_len:%d,uncompress_len:%d\n"< / span > , w_len,uncompress_len);
close(fd_out);
_exit:
< strong class = "hl-keyword" > if< / strong > (out_buff)
aicos_free(MEM_CMA, (< strong class = "hl-keyword" > void< / strong > *)out_buff);
< strong class = "hl-keyword" > if< / strong > (in_buff)
aicos_free(MEM_CMA, (< strong class = "hl-keyword" > void< / strong > *)in_buff);
< strong class = "hl-keyword" > if< / strong > (fd_in)
close(fd_in);
< strong class = "hl-keyword" > return< / strong > ret;
}< / pre >
< / div >
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< / section >
< / div >
< / article > < / main > < / div >
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< / div >
< nav role = "navigation" id = "wh_topic_toc" aria-label = "On this page" class = "col-lg-2 d-none d-lg-block navbar d-print-none" >
< div id = "wh_topic_toc_content" >
< div class = " wh_topic_toc " > < div class = "wh_topic_label" > 在本页上< / div > < ul > < li class = "section-item" > < div class = "section-title" > < a href = "#mpp_zlib_design_and_interface_intro__id9" data-tocid = "mpp_zlib_design_and_interface_intro__id9" > 接口设计< / a > < / div > < / li > < li class = "section-item" > < div class = "section-title" > < a href = "#mpp_zlib_design_and_interface_intro__section_qtn_xl4_f1c" data-tocid = "mpp_zlib_design_and_interface_intro__section_qtn_xl4_f1c" > 参考 Demo< / a > < / div > < / li > < / ul > < / div >
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< footer class = "navbar navbar-default wh_footer" >
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< title > footer def< / title >
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.p1 {
font-family: FangZhengShuSong, Times, serif;
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.p2 {
font-family: Arial, Helvetica, sans-serif;
}
.p3 {
font-family: "Lucida Console", "Courier New", monospace;
}
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< div class = "webhelp.fragment.footer" >
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< p class = "p1" > Copyright © 2019-2025 广东匠芯创科技有限公司. All rights reserved.< / p >
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< div >
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< div class = "generation_time" >
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Update Time: 2025-05-19
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< div id = "go2top" class = "d-print-none" >
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< div id = "modal_img_large" class = "modal" >
< span class = "close oxy-icon oxy-icon-remove" > < / span >
< div id = "modal_img_container" > < / div >
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< script src = "${pd}/publishing/publishing-styles-AIC-template/js/custom.js" defer = "defer" > < / script >
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