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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/mpp/mpp-zlib_design_and_interface_intro.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">MPP Zlib 设计及接口说明</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
|
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Read time: 4 minute(s)
|
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</div><div class="- topic/body concept/conbody body conbody"><p class="- topic/p p" data-ofbid="d291802e24__20250121171757">MPP zlib 的功能：利用硬件加速解压 zlib 文件。</p><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>
|
||
|
||
<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>
|
||
<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"><th class="- topic/entry entry colsep-1 rowsep-1" id="mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__2">
|
||
<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>
|
||
</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__2">解压 zlib 文件</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__2">
|
||
<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>
|
||
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__2">>0，解压数据实际长度； <0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="mpp_zlib_design_and_interface_intro__table_gvn_2nt_2dc__entry__2">
|
||
<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>
|
||
</td></tr></tbody></table></div>
|
||
</div>
|
||
</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>
|
||
|
||
<div class="- topic/p p" data-ofbid="d291802e114__20250121171757">
|
||
<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>
|
||
</section></div></article></main></div>
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|
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<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">
|
||
<div class=" footer-container mx-auto ">
|
||
<title>footer def</title>
|
||
<style><!--
|
||
|
||
.p1 {
|
||
font-family: FangZhengShuSong, Times, serif;
|
||
}
|
||
.p2 {
|
||
font-family: Arial, Helvetica, sans-serif;
|
||
}
|
||
.p3 {
|
||
font-family: "Lucida Console", "Courier New", monospace;
|
||
}
|
||
|
||
--></style>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<div class="webhelp.fragment.footer">
|
||
<p class="p1">Copyright © 2019-2024 广东匠芯创科技有限公司. All rights reserved.</p>
|
||
</div><div>
|
||
<div class="generation_time">
|
||
Update Time: 2025-01-21
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</footer>
|
||
|
||
<div id="go2top" class="d-print-none">
|
||
<span class="oxy-icon oxy-icon-up"></span>
|
||
</div>
|
||
|
||
<div id="modal_img_large" class="modal">
|
||
<span class="close oxy-icon oxy-icon-remove"></span>
|
||
<div id="modal_img_container"></div>
|
||
<div id="caption"></div>
|
||
</div>
|
||
|
||
|
||
<script src="${pd}/publishing/publishing-styles-AIC-template/js/custom.js" defer="defer"></script>
|
||
|
||
|
||
</body>
|
||
</html> |