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<p>common internal and external API header
<a href="#details">More...</a></p>
<div class="textblock"><code>#include <errno.h></code><br/>
<code>#include <inttypes.h></code><br/>
<code>#include <limits.h></code><br/>
<code>#include <math.h></code><br/>
<code>#include <stdint.h></code><br/>
<code>#include <stdio.h></code><br/>
<code>#include <stdlib.h></code><br/>
<code>#include <string.h></code><br/>
<code>#include "<a class="el" href="attributes_8h_source.html">attributes.h</a>"</code><br/>
<code>#include "<a class="el" href="libavutil_2version_8h_source.html">version.h</a>"</code><br/>
<code>#include "libavutil/avconfig.h"</code><br/>
<code>#include "<a class="el" href="common_8h_source.html">common.h</a>"</code><br/>
<code>#include "<a class="el" href="mem_8h_source.html">mem.h</a>"</code><br/>
</div>
<p><a href="common_8h_source.html">Go to the source code of this file.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="define-members"></a>
Defines</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a309bdca20f6a78431379fc69442d98ea">AV_NE</a>(be, le)   (le)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#aa79ca71ef110a498d8275cbf7aa75a93">RSHIFT</a>(a, b)   ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a7a2a86492a286d6d20678da1dbb00525">ROUNDED_DIV</a>(a, b)   (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a6fa4d4c04620a5112cafd0a86dca9f0a">FF_CEIL_RSHIFT</a>(a, b)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a5117194af5289224bceaaa5466586d8f">FFUDIV</a>(a, b)   (((a)>0 ?(a):(a)-(b)+1) / (b))</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#aa0241c1e04e45d7be1b388d83ab57f22">FFUMOD</a>(a, b)   ((a)-(b)*<a class="el" href="common_8h.html#a5117194af5289224bceaaa5466586d8f">FFUDIV</a>(a,b))</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#ad6d88940cfc29c13a3e51ded211fc242">FFABS</a>(a)   ((a) >= 0 ? (a) : (-(a)))</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#af5e4ff7761996bc901e59bd59756268d">FFSIGN</a>(a)   ((a) > 0 ? 1 : -1)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a9960bd6780a9b16a216a57be1ee04359">FFMAX</a>(a, b)   ((a) > (b) ? (a) : (b))</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a013fdaa079045ec5632fe121e211e516">FFMAX3</a>(a, b, c)   <a class="el" href="common_8h.html#a9960bd6780a9b16a216a57be1ee04359">FFMAX</a>(<a class="el" href="common_8h.html#a9960bd6780a9b16a216a57be1ee04359">FFMAX</a>(a,b),c)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a0f84cbd7fd810cd678157c98cbfad4b0">FFMIN</a>(a, b)   ((a) > (b) ? (b) : (a))</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#af6afbffa12562b076c34055bdcb3ad65">FFMIN3</a>(a, b, c)   <a class="el" href="common_8h.html#a0f84cbd7fd810cd678157c98cbfad4b0">FFMIN</a>(<a class="el" href="common_8h.html#a0f84cbd7fd810cd678157c98cbfad4b0">FFMIN</a>(a,b),c)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a09a0bb7d8fcfac416de7a5fe7fd8b0f1">FFSWAP</a>(type, a, b)   do{type SWAP_tmp= b; b= a; a= SWAP_tmp;}while(0)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a3508a98d3ee7e2c9a4841fe264cf70f7">FF_ARRAY_ELEMS</a>(a)   (sizeof(a) / sizeof((a)[0]))</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#acae4ba605b3a7d535b7ac058ffe96892">FFALIGN</a>(x, a)   (((x)+(a)-1)&~((a)-1))</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a19c68e2b5efcbab914d79db1e4fee734">MKTAG</a>(a, b, c, d)   ((a) | ((b) << 8) | ((c) << 16) | ((unsigned)(d) << 24))</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a1e233db224cd0a3079fd4572d1a3d717">MKBETAG</a>(a, b, c, d)   ((d) | ((c) << 8) | ((b) << 16) | ((unsigned)(a) << 24))</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a1a2fd8cd42afb00c9f69562f52b1ae4b">GET_UTF8</a>(val, GET_BYTE, ERROR)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Convert a UTF-8 character (up to 4 bytes) to its 32-bit UCS-4 encoded form. <a href="#a1a2fd8cd42afb00c9f69562f52b1ae4b"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a2665137b6cc64bb5cf491ba9f9dbd215">GET_UTF16</a>(val, GET_16BIT, ERROR)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Convert a UTF-16 character (2 or 4 bytes) to its 32-bit UCS-4 encoded form. <a href="#a2665137b6cc64bb5cf491ba9f9dbd215"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#ac6a994fe28410a8d14f70f0992db4f42">PUT_UTF8</a>(val, tmp, PUT_BYTE)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Convert a 32-bit Unicode character to its UTF-8 encoded form (up to 4 bytes long). <a href="#ac6a994fe28410a8d14f70f0992db4f42"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a6486c4a216b16b4d2615c23d8429cd6b">PUT_UTF16</a>(val, tmp, PUT_16BIT)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Convert a 32-bit Unicode character to its UTF-16 encoded form (2 or 4 bytes). <a href="#a6486c4a216b16b4d2615c23d8429cd6b"></a><br/></td></tr>
<tr><td colspan="2"><h2><a name="func-members"></a>
Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a10e72d08c6a66c91cf7218532631684e">av_log2</a> (unsigned v)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Reverse the order of the bits of an 8-bits unsigned integer. <a href="#a10e72d08c6a66c91cf7218532631684e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a8a1d3f387b1eab65327453f6a8e7e9ae">av_log2_16bit</a> (unsigned v)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static av_always_inline <br class="typebreak"/>
<a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a465f39d69c5a5fe0e070b6ec4d0fed29">av_clip_c</a> (int a, int amin, int amax)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Clip a signed integer value into the amin-amax range. <a href="#a465f39d69c5a5fe0e070b6ec4d0fed29"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static av_always_inline <br class="typebreak"/>
<a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int64_t </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#aa4ed7e144d5b8397cff8656e9c786cb2">av_clip64_c</a> (int64_t a, int64_t amin, int64_t amax)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Clip a signed 64bit integer value into the amin-amax range. <a href="#aa4ed7e144d5b8397cff8656e9c786cb2"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static av_always_inline <br class="typebreak"/>
<a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> uint8_t </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a8deed4a1ec39d0b1ab82d1f0e590a6f5">av_clip_uint8_c</a> (int a)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Clip a signed integer value into the 0-255 range. <a href="#a8deed4a1ec39d0b1ab82d1f0e590a6f5"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static av_always_inline <br class="typebreak"/>
<a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int8_t </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a3091e5b3f2a340c3ddb29f6733fb2a4c">av_clip_int8_c</a> (int a)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Clip a signed integer value into the -128,127 range. <a href="#a3091e5b3f2a340c3ddb29f6733fb2a4c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static av_always_inline <br class="typebreak"/>
<a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> uint16_t </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a70a9a6b77373c47c48ef93511edaf9ce">av_clip_uint16_c</a> (int a)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Clip a signed integer value into the 0-65535 range. <a href="#a70a9a6b77373c47c48ef93511edaf9ce"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static av_always_inline <br class="typebreak"/>
<a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int16_t </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#aae95fa7073f1caa097951161985240f7">av_clip_int16_c</a> (int a)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Clip a signed integer value into the -32768,32767 range. <a href="#aae95fa7073f1caa097951161985240f7"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static av_always_inline <br class="typebreak"/>
<a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#ae245fb123a6e2a664c4806c034421e1e">av_clipl_int32_c</a> (int64_t a)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Clip a signed 64-bit integer value into the -2147483648,2147483647 range. <a href="#ae245fb123a6e2a664c4806c034421e1e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static av_always_inline <br class="typebreak"/>
<a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#ad24148f23ca385e16b14885f52360abe">av_clip_intp2_c</a> (int a, int p)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Clip a signed integer into the -(2^p),(2^p-1) range. <a href="#ad24148f23ca385e16b14885f52360abe"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static av_always_inline <br class="typebreak"/>
<a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> unsigned </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a867dba37c785d27d42b272aa968efda8">av_clip_uintp2_c</a> (int a, int p)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Clip a signed integer to an unsigned power of two range. <a href="#a867dba37c785d27d42b272aa968efda8"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static av_always_inline <br class="typebreak"/>
<a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> unsigned </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a3cb38786757c8f2a468560d9d7a6c59c">av_mod_uintp2_c</a> (unsigned a, unsigned p)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Clear high bits from an unsigned integer starting with specific bit position. <a href="#a3cb38786757c8f2a468560d9d7a6c59c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static av_always_inline int </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a2ff75b1bf7fd1a261dd2f2919e8d23e1">av_sat_add32_c</a> (int a, int b)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Add two signed 32-bit values with saturation. <a href="#a2ff75b1bf7fd1a261dd2f2919e8d23e1"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static av_always_inline int </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#af235b48678850832493ac21160ff8458">av_sat_dadd32_c</a> (int a, int b)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Add a doubled value to another value with saturation at both stages. <a href="#af235b48678850832493ac21160ff8458"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static av_always_inline <br class="typebreak"/>
<a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> float </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a7d5a6331d8708d4516aeab2413f86392">av_clipf_c</a> (float a, float amin, float amax)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Clip a float value into the amin-amax range. <a href="#a7d5a6331d8708d4516aeab2413f86392"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static av_always_inline <br class="typebreak"/>
<a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> double </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a9a257b0d07c767325ee48b5e16e0b97f">av_clipd_c</a> (double a, double amin, double amax)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Clip a double value into the amin-amax range. <a href="#a9a257b0d07c767325ee48b5e16e0b97f"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static av_always_inline <br class="typebreak"/>
<a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#ad94b463be296690fc9c096d55203b42b">av_ceil_log2_c</a> (int x)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Compute ceil(log2(x)). <a href="#ad94b463be296690fc9c096d55203b42b"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static av_always_inline <br class="typebreak"/>
<a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a73ced2c040c8e53f58a6073c3f3927b5">av_popcount_c</a> (uint32_t x)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Count number of bits set to one in x. <a href="#a73ced2c040c8e53f58a6073c3f3927b5"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static av_always_inline <br class="typebreak"/>
<a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int </td><td class="memItemRight" valign="bottom"><a class="el" href="common_8h.html#a1016d46d60ca2d27d8ab2af5f0f7c57a">av_popcount64_c</a> (uint64_t x)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Count number of bits set to one in x. <a href="#a1016d46d60ca2d27d8ab2af5f0f7c57a"></a><br/></td></tr>
</table>
<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>common internal and external API header </p>
<p>Definition in file <a class="el" href="common_8h_source.html">common.h</a>.</p>
</div><hr/><h2>Define Documentation</h2>
<a class="anchor" id="a309bdca20f6a78431379fc69442d98ea"></a><!-- doxytag: member="common.h::AV_NE" ref="a309bdca20f6a78431379fc69442d98ea" args="(be, le)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#a309bdca20f6a78431379fc69442d98ea">AV_NE</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">be, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">le </td>
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<td></td>
<td>)</td>
<td></td><td>   (le)</td>
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<div class="memdoc">
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="demuxing_decoding_8c-example.html#a72">demuxing_decoding.c</a>, and <a class="el" href="resampling_audio_8c-example.html#a7">resampling_audio.c</a>.</dd>
</dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00049">49</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
<p>Referenced by <a class="el" href="demuxing__decoding_8c_source.html#l00197">get_format_from_sample_fmt()</a>.</p>
</div>
</div>
<a class="anchor" id="aa79ca71ef110a498d8275cbf7aa75a93"></a><!-- doxytag: member="common.h::RSHIFT" ref="aa79ca71ef110a498d8275cbf7aa75a93" args="(a, b)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#aa79ca71ef110a498d8275cbf7aa75a93">RSHIFT</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">a, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">b </td>
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<td></td>
<td>)</td>
<td></td><td>   ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))</td>
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<div class="memdoc">
<p>Definition at line <a class="el" href="common_8h_source.html#l00053">53</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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</div>
<a class="anchor" id="a7a2a86492a286d6d20678da1dbb00525"></a><!-- doxytag: member="common.h::ROUNDED_DIV" ref="a7a2a86492a286d6d20678da1dbb00525" args="(a, b)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#a7a2a86492a286d6d20678da1dbb00525">ROUNDED_DIV</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">a, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">b </td>
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<td></td>
<td>)</td>
<td></td><td>   (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))</td>
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<div class="memdoc">
<p>Definition at line <a class="el" href="common_8h_source.html#l00055">55</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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<a class="anchor" id="a6fa4d4c04620a5112cafd0a86dca9f0a"></a><!-- doxytag: member="common.h::FF_CEIL_RSHIFT" ref="a6fa4d4c04620a5112cafd0a86dca9f0a" args="(a, b)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#a6fa4d4c04620a5112cafd0a86dca9f0a">FF_CEIL_RSHIFT</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">a, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">b </td>
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<td></td>
<td>)</td>
<td></td><td></td>
</tr>
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<b>Value:</b><div class="fragment"><pre class="fragment">(!<a class="code" href="attributes_8h.html#a4887afda7f138d25d3f0dd843ca0ac18">av_builtin_constant_p</a>(b) ? -((-(a)) >> (b)) \
: ((a) + (1<<(b)) - 1) >> (b))
</pre></div>
<p>Definition at line <a class="el" href="common_8h_source.html#l00057">57</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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<a class="anchor" id="a5117194af5289224bceaaa5466586d8f"></a><!-- doxytag: member="common.h::FFUDIV" ref="a5117194af5289224bceaaa5466586d8f" args="(a, b)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#a5117194af5289224bceaaa5466586d8f">FFUDIV</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">a, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">b </td>
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<td></td>
<td>)</td>
<td></td><td>   (((a)>0 ?(a):(a)-(b)+1) / (b))</td>
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<p>Definition at line <a class="el" href="common_8h_source.html#l00059">59</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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<a class="anchor" id="aa0241c1e04e45d7be1b388d83ab57f22"></a><!-- doxytag: member="common.h::FFUMOD" ref="aa0241c1e04e45d7be1b388d83ab57f22" args="(a, b)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#aa0241c1e04e45d7be1b388d83ab57f22">FFUMOD</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">a, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">b </td>
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<td></td>
<td>)</td>
<td></td><td>   ((a)-(b)*<a class="el" href="common_8h.html#a5117194af5289224bceaaa5466586d8f">FFUDIV</a>(a,b))</td>
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<p>Definition at line <a class="el" href="common_8h_source.html#l00060">60</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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<a class="anchor" id="ad6d88940cfc29c13a3e51ded211fc242"></a><!-- doxytag: member="common.h::FFABS" ref="ad6d88940cfc29c13a3e51ded211fc242" args="(a)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#ad6d88940cfc29c13a3e51ded211fc242">FFABS</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">a</td><td>)</td>
<td>   ((a) >= 0 ? (a) : (-(a)))</td>
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<p>Definition at line <a class="el" href="common_8h_source.html#l00061">61</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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<a class="anchor" id="af5e4ff7761996bc901e59bd59756268d"></a><!-- doxytag: member="common.h::FFSIGN" ref="af5e4ff7761996bc901e59bd59756268d" args="(a)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#af5e4ff7761996bc901e59bd59756268d">FFSIGN</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">a</td><td>)</td>
<td>   ((a) > 0 ? 1 : -1)</td>
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<p>Definition at line <a class="el" href="common_8h_source.html#l00062">62</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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<a class="anchor" id="a9960bd6780a9b16a216a57be1ee04359"></a><!-- doxytag: member="common.h::FFMAX" ref="a9960bd6780a9b16a216a57be1ee04359" args="(a, b)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#a9960bd6780a9b16a216a57be1ee04359">FFMAX</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">a, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">b </td>
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<td></td>
<td>)</td>
<td></td><td>   ((a) > (b) ? (a) : (b))</td>
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<dl><dt><b>Examples: </b></dt><dd><a class="el" href="decoding_encoding_8c-example.html#a6">decoding_encoding.c</a>.</dd>
</dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00064">64</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
<p>Referenced by <a class="el" href="decoding__encoding_8c_source.html#l00061">select_sample_rate()</a>.</p>
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<a class="anchor" id="a013fdaa079045ec5632fe121e211e516"></a><!-- doxytag: member="common.h::FFMAX3" ref="a013fdaa079045ec5632fe121e211e516" args="(a, b, c)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#a013fdaa079045ec5632fe121e211e516">FFMAX3</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">a, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">b, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">c </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td>   <a class="el" href="common_8h.html#a9960bd6780a9b16a216a57be1ee04359">FFMAX</a>(<a class="el" href="common_8h.html#a9960bd6780a9b16a216a57be1ee04359">FFMAX</a>(a,b),c)</td>
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<p>Definition at line <a class="el" href="common_8h_source.html#l00065">65</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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<a class="anchor" id="a0f84cbd7fd810cd678157c98cbfad4b0"></a><!-- doxytag: member="common.h::FFMIN" ref="a0f84cbd7fd810cd678157c98cbfad4b0" args="(a, b)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#a0f84cbd7fd810cd678157c98cbfad4b0">FFMIN</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">a, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">b </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td>   ((a) > (b) ? (b) : (a))</td>
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<dl><dt><b>Examples: </b></dt><dd><a class="el" href="avio_reading_8c-example.html#a4">avio_reading.c</a>, <a class="el" href="demuxing_decoding_8c-example.html#a48">demuxing_decoding.c</a>, and <a class="el" href="transcode_aac_8c-example.html#a85">transcode_aac.c</a>.</dd>
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<p>Definition at line <a class="el" href="common_8h_source.html#l00066">66</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
<p>Referenced by <a class="el" href="demuxing__decoding_8c_source.html#l00070">decode_packet()</a>, <a class="el" href="transcode__aac_8c_source.html#l00597">load_encode_and_write()</a>, and <a class="el" href="avio__reading_8c_source.html#l00042">read_packet()</a>.</p>
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<a class="anchor" id="af6afbffa12562b076c34055bdcb3ad65"></a><!-- doxytag: member="common.h::FFMIN3" ref="af6afbffa12562b076c34055bdcb3ad65" args="(a, b, c)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#af6afbffa12562b076c34055bdcb3ad65">FFMIN3</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">a, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">b, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">c </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td>   <a class="el" href="common_8h.html#a0f84cbd7fd810cd678157c98cbfad4b0">FFMIN</a>(<a class="el" href="common_8h.html#a0f84cbd7fd810cd678157c98cbfad4b0">FFMIN</a>(a,b),c)</td>
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<p>Definition at line <a class="el" href="common_8h_source.html#l00067">67</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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<a class="anchor" id="a09a0bb7d8fcfac416de7a5fe7fd8b0f1"></a><!-- doxytag: member="common.h::FFSWAP" ref="a09a0bb7d8fcfac416de7a5fe7fd8b0f1" args="(type, a, b)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#a09a0bb7d8fcfac416de7a5fe7fd8b0f1">FFSWAP</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">type, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">a, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">b </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td>   do{type SWAP_tmp= b; b= a; a= SWAP_tmp;}while(0)</td>
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<p>Definition at line <a class="el" href="common_8h_source.html#l00069">69</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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<a class="anchor" id="a3508a98d3ee7e2c9a4841fe264cf70f7"></a><!-- doxytag: member="common.h::FF_ARRAY_ELEMS" ref="a3508a98d3ee7e2c9a4841fe264cf70f7" args="(a)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#a3508a98d3ee7e2c9a4841fe264cf70f7">FF_ARRAY_ELEMS</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">a</td><td>)</td>
<td>   (sizeof(a) / sizeof((a)[0]))</td>
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<dl><dt><b>Examples: </b></dt><dd><a class="el" href="demuxing_decoding_8c-example.html#a71">demuxing_decoding.c</a>, and <a class="el" href="resampling_audio_8c-example.html#a6">resampling_audio.c</a>.</dd>
</dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00070">70</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
<p>Referenced by <a class="el" href="demuxing__decoding_8c_source.html#l00197">get_format_from_sample_fmt()</a>.</p>
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<a class="anchor" id="acae4ba605b3a7d535b7ac058ffe96892"></a><!-- doxytag: member="common.h::FFALIGN" ref="acae4ba605b3a7d535b7ac058ffe96892" args="(x, a)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#acae4ba605b3a7d535b7ac058ffe96892">FFALIGN</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">x, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">a </td>
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<td></td>
<td>)</td>
<td></td><td>   (((x)+(a)-1)&~((a)-1))</td>
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<p>Definition at line <a class="el" href="common_8h_source.html#l00071">71</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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<a class="anchor" id="a19c68e2b5efcbab914d79db1e4fee734"></a><!-- doxytag: member="common.h::MKTAG" ref="a19c68e2b5efcbab914d79db1e4fee734" args="(a, b, c, d)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#a19c68e2b5efcbab914d79db1e4fee734">MKTAG</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">a, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">b, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">c, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">d </td>
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<td></td>
<td>)</td>
<td></td><td>   ((a) | ((b) << 8) | ((c) << 16) | ((unsigned)(d) << 24))</td>
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<p>Definition at line <a class="el" href="common_8h_source.html#l00315">315</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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<a class="anchor" id="a1e233db224cd0a3079fd4572d1a3d717"></a><!-- doxytag: member="common.h::MKBETAG" ref="a1e233db224cd0a3079fd4572d1a3d717" args="(a, b, c, d)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#a1e233db224cd0a3079fd4572d1a3d717">MKBETAG</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">a, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">b, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">c, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">d </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td>   ((d) | ((c) << 8) | ((b) << 16) | ((unsigned)(a) << 24))</td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Definition at line <a class="el" href="common_8h_source.html#l00316">316</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
</div>
</div>
<a class="anchor" id="a1a2fd8cd42afb00c9f69562f52b1ae4b"></a><!-- doxytag: member="common.h::GET_UTF8" ref="a1a2fd8cd42afb00c9f69562f52b1ae4b" args="(val, GET_BYTE, ERROR)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#a1a2fd8cd42afb00c9f69562f52b1ae4b">GET_UTF8</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">val, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">GET_BYTE, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">ERROR </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<b>Value:</b><div class="fragment"><pre class="fragment">val= GET_BYTE;\
{\
uint32_t top = (val & 128) >> 1;\
if ((val & 0xc0) == 0x80 || val >= 0xFE)\
ERROR\
while (val & top) {\
int tmp= GET_BYTE - 128;\
if(tmp>>6)\
ERROR\
val= (val<<6) + tmp;\
top <<= 5;\
}\
val &= (top << 1) - 1;\
}
</pre></div>
<p>Convert a UTF-8 character (up to 4 bytes) to its 32-bit UCS-4 encoded form. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">val</td><td>Output value, must be an lvalue of type uint32_t. </td></tr>
<tr><td class="paramname">GET_BYTE</td><td>Expression reading one byte from the input. Evaluated up to 7 times (4 for the currently assigned Unicode range). With a memory buffer input, this could be *ptr++. </td></tr>
<tr><td class="paramname">ERROR</td><td>Expression to be evaluated on invalid input, typically a goto statement.</td></tr>
</table>
</dd>
</dl>
<dl class="warning"><dt><b>Warning:</b></dt><dd>ERROR should not contain a loop control statement which could interact with the internal while loop, and should force an exit from the macro code (e.g. through a goto or a return) in order to prevent undefined results. </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00334">334</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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</div>
<a class="anchor" id="a2665137b6cc64bb5cf491ba9f9dbd215"></a><!-- doxytag: member="common.h::GET_UTF16" ref="a2665137b6cc64bb5cf491ba9f9dbd215" args="(val, GET_16BIT, ERROR)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#a2665137b6cc64bb5cf491ba9f9dbd215">GET_UTF16</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">val, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">GET_16BIT, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">ERROR </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
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<div class="memdoc">
<b>Value:</b><div class="fragment"><pre class="fragment">val = GET_16BIT;\
{\
unsigned <span class="keywordtype">int</span> hi = val - 0xD800;\
if (hi < 0x800) {\
val = GET_16BIT - 0xDC00;\
if (val > 0x3FFU || hi > 0x3FFU)\
ERROR\
val += (hi<<10) + 0x10000;\
}\
}\
</pre></div>
<p>Convert a UTF-16 character (2 or 4 bytes) to its 32-bit UCS-4 encoded form. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">val</td><td>Output value, must be an lvalue of type uint32_t. </td></tr>
<tr><td class="paramname">GET_16BIT</td><td>Expression returning two bytes of UTF-16 data converted to native byte order. Evaluated one or two times. </td></tr>
<tr><td class="paramname">ERROR</td><td>Expression to be evaluated on invalid input, typically a goto statement. </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00359">359</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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</div>
<a class="anchor" id="ac6a994fe28410a8d14f70f0992db4f42"></a><!-- doxytag: member="common.h::PUT_UTF8" ref="ac6a994fe28410a8d14f70f0992db4f42" args="(val, tmp, PUT_BYTE)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#ac6a994fe28410a8d14f70f0992db4f42">PUT_UTF8</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">val, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">tmp, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">PUT_BYTE </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<b>Value:</b><div class="fragment"><pre class="fragment">{\
int bytes, shift;\
uint32_t in = val;\
if (in < 0x80) {\
tmp = in;\
PUT_BYTE\
} <span class="keywordflow">else</span> {\
bytes = (<a class="code" href="common_8h.html#a10e72d08c6a66c91cf7218532631684e" title="Reverse the order of the bits of an 8-bits unsigned integer.">av_log2</a>(in) + 4) / 5;\
shift = (bytes - 1) * 6;\
tmp = (256 - (256 >> bytes)) | (in >> shift);\
PUT_BYTE\
while (shift >= 6) {\
shift -= 6;\
tmp = 0x80 | ((in >> shift) & 0x3f);\
PUT_BYTE\
}\
}\
}
</pre></div>
<p>Convert a 32-bit Unicode character to its UTF-8 encoded form (up to 4 bytes long). </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">val</td><td>is an input-only argument and should be of type uint32_t. It holds a UCS-4 encoded Unicode character that is to be converted to UTF-8. If val is given as a function it is executed only once. </td></tr>
<tr><td class="paramname">tmp</td><td>is a temporary variable and should be of type uint8_t. It represents an intermediate value during conversion that is to be output by PUT_BYTE. </td></tr>
<tr><td class="paramname">PUT_BYTE</td><td>writes the converted UTF-8 bytes to any proper destination. It could be a function or a statement, and uses tmp as the input byte. For example, PUT_BYTE could be "*output++ = tmp;" PUT_BYTE will be executed up to 4 times for values in the valid UTF-8 range and up to 7 times in the general case, depending on the length of the converted Unicode character. </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00387">387</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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<a class="anchor" id="a6486c4a216b16b4d2615c23d8429cd6b"></a><!-- doxytag: member="common.h::PUT_UTF16" ref="a6486c4a216b16b4d2615c23d8429cd6b" args="(val, tmp, PUT_16BIT)" -->
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<td class="memname">#define <a class="el" href="common_8h.html#a6486c4a216b16b4d2615c23d8429cd6b">PUT_UTF16</a></td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">val, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">tmp, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">PUT_16BIT </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<b>Value:</b><div class="fragment"><pre class="fragment">{\
uint32_t in = val;\
if (in < 0x10000) {\
tmp = in;\
PUT_16BIT\
} <span class="keywordflow">else</span> {\
tmp = 0xD800 | ((in - 0x10000) >> 10);\
PUT_16BIT\
tmp = 0xDC00 | ((in - 0x10000) & 0x3FF);\
PUT_16BIT\
}\
}\
</pre></div>
<p>Convert a 32-bit Unicode character to its UTF-16 encoded form (2 or 4 bytes). </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">val</td><td>is an input-only argument and should be of type uint32_t. It holds a UCS-4 encoded Unicode character that is to be converted to UTF-16. If val is given as a function it is executed only once. </td></tr>
<tr><td class="paramname">tmp</td><td>is a temporary variable and should be of type uint16_t. It represents an intermediate value during conversion that is to be output by PUT_16BIT. </td></tr>
<tr><td class="paramname">PUT_16BIT</td><td>writes the converted UTF-16 data to any proper destination in desired endianness. It could be a function or a statement, and uses tmp as the input byte. For example, PUT_BYTE could be "*output++ = tmp;" PUT_BYTE will be executed 1 or 2 times depending on input character. </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00421">421</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
</div>
</div>
<hr/><h2>Function Documentation</h2>
<a class="anchor" id="a10e72d08c6a66c91cf7218532631684e"></a><!-- doxytag: member="common.h::av_log2" ref="a10e72d08c6a66c91cf7218532631684e" args="(unsigned v)" -->
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<td class="memname"><a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int <a class="el" href="common_8h.html#a10e72d08c6a66c91cf7218532631684e">av_log2</a> </td>
<td>(</td>
<td class="paramtype">unsigned </td>
<td class="paramname"><em>v</em></td><td>)</td>
<td></td>
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<p>Reverse the order of the bits of an 8-bits unsigned integer. </p>
<p>Referenced by <a class="el" href="common_8h_source.html#l00286">av_ceil_log2_c()</a>.</p>
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<a class="anchor" id="a8a1d3f387b1eab65327453f6a8e7e9ae"></a><!-- doxytag: member="common.h::av_log2_16bit" ref="a8a1d3f387b1eab65327453f6a8e7e9ae" args="(unsigned v)" -->
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<td class="memname"><a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int <a class="el" href="common_8h.html#a8a1d3f387b1eab65327453f6a8e7e9ae">av_log2_16bit</a> </td>
<td>(</td>
<td class="paramtype">unsigned </td>
<td class="paramname"><em>v</em></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
</div>
</div>
<a class="anchor" id="a465f39d69c5a5fe0e070b6ec4d0fed29"></a><!-- doxytag: member="common.h::av_clip_c" ref="a465f39d69c5a5fe0e070b6ec4d0fed29" args="(int a, int amin, int amax)" -->
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<td class="memname">static av_always_inline <a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int <a class="el" href="common_8h.html#a465f39d69c5a5fe0e070b6ec4d0fed29">av_clip_c</a> </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>a</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>amin</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>amax</em> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td><code> [static]</code></td>
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<p>Clip a signed integer value into the amin-amax range. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">a</td><td>value to clip </td></tr>
<tr><td class="paramname">amin</td><td>minimum value of the clip range </td></tr>
<tr><td class="paramname">amax</td><td>maximum value of the clip range </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>clipped value </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00105">105</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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</div>
<a class="anchor" id="aa4ed7e144d5b8397cff8656e9c786cb2"></a><!-- doxytag: member="common.h::av_clip64_c" ref="aa4ed7e144d5b8397cff8656e9c786cb2" args="(int64_t a, int64_t amin, int64_t amax)" -->
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<td class="memname">static av_always_inline <a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int64_t <a class="el" href="common_8h.html#aa4ed7e144d5b8397cff8656e9c786cb2">av_clip64_c</a> </td>
<td>(</td>
<td class="paramtype">int64_t </td>
<td class="paramname"><em>a</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int64_t </td>
<td class="paramname"><em>amin</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int64_t </td>
<td class="paramname"><em>amax</em> </td>
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<td></td>
<td>)</td>
<td></td><td><code> [static]</code></td>
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<p>Clip a signed 64bit integer value into the amin-amax range. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">a</td><td>value to clip </td></tr>
<tr><td class="paramname">amin</td><td>minimum value of the clip range </td></tr>
<tr><td class="paramname">amax</td><td>maximum value of the clip range </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>clipped value </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00122">122</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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<a class="anchor" id="a8deed4a1ec39d0b1ab82d1f0e590a6f5"></a><!-- doxytag: member="common.h::av_clip_uint8_c" ref="a8deed4a1ec39d0b1ab82d1f0e590a6f5" args="(int a)" -->
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<td class="memname">static av_always_inline <a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> uint8_t <a class="el" href="common_8h.html#a8deed4a1ec39d0b1ab82d1f0e590a6f5">av_clip_uint8_c</a> </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>a</em></td><td>)</td>
<td><code> [static]</code></td>
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<p>Clip a signed integer value into the 0-255 range. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">a</td><td>value to clip </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>clipped value </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00137">137</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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<a class="anchor" id="a3091e5b3f2a340c3ddb29f6733fb2a4c"></a><!-- doxytag: member="common.h::av_clip_int8_c" ref="a3091e5b3f2a340c3ddb29f6733fb2a4c" args="(int a)" -->
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<td class="memname">static av_always_inline <a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int8_t <a class="el" href="common_8h.html#a3091e5b3f2a340c3ddb29f6733fb2a4c">av_clip_int8_c</a> </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>a</em></td><td>)</td>
<td><code> [static]</code></td>
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<p>Clip a signed integer value into the -128,127 range. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">a</td><td>value to clip </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>clipped value </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00148">148</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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<a class="anchor" id="a70a9a6b77373c47c48ef93511edaf9ce"></a><!-- doxytag: member="common.h::av_clip_uint16_c" ref="a70a9a6b77373c47c48ef93511edaf9ce" args="(int a)" -->
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<td class="memname">static av_always_inline <a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> uint16_t <a class="el" href="common_8h.html#a70a9a6b77373c47c48ef93511edaf9ce">av_clip_uint16_c</a> </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>a</em></td><td>)</td>
<td><code> [static]</code></td>
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<p>Clip a signed integer value into the 0-65535 range. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">a</td><td>value to clip </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>clipped value </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00159">159</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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<a class="anchor" id="aae95fa7073f1caa097951161985240f7"></a><!-- doxytag: member="common.h::av_clip_int16_c" ref="aae95fa7073f1caa097951161985240f7" args="(int a)" -->
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<td class="memname">static av_always_inline <a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int16_t <a class="el" href="common_8h.html#aae95fa7073f1caa097951161985240f7">av_clip_int16_c</a> </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>a</em></td><td>)</td>
<td><code> [static]</code></td>
</tr>
</table>
</div>
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<p>Clip a signed integer value into the -32768,32767 range. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">a</td><td>value to clip </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>clipped value </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00170">170</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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<a class="anchor" id="ae245fb123a6e2a664c4806c034421e1e"></a><!-- doxytag: member="common.h::av_clipl_int32_c" ref="ae245fb123a6e2a664c4806c034421e1e" args="(int64_t a)" -->
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<td class="memname">static av_always_inline <a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int32_t <a class="el" href="common_8h.html#ae245fb123a6e2a664c4806c034421e1e">av_clipl_int32_c</a> </td>
<td>(</td>
<td class="paramtype">int64_t </td>
<td class="paramname"><em>a</em></td><td>)</td>
<td><code> [static]</code></td>
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</div>
<div class="memdoc">
<p>Clip a signed 64-bit integer value into the -2147483648,2147483647 range. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">a</td><td>value to clip </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>clipped value </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00181">181</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
</div>
</div>
<a class="anchor" id="ad24148f23ca385e16b14885f52360abe"></a><!-- doxytag: member="common.h::av_clip_intp2_c" ref="ad24148f23ca385e16b14885f52360abe" args="(int a, int p)" -->
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<td class="memname">static av_always_inline <a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int <a class="el" href="common_8h.html#ad24148f23ca385e16b14885f52360abe">av_clip_intp2_c</a> </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>p</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td><code> [static]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Clip a signed integer into the -(2^p),(2^p-1) range. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">a</td><td>value to clip </td></tr>
<tr><td class="paramname">p</td><td>bit position to clip at </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>clipped value </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00193">193</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
</div>
</div>
<a class="anchor" id="a867dba37c785d27d42b272aa968efda8"></a><!-- doxytag: member="common.h::av_clip_uintp2_c" ref="a867dba37c785d27d42b272aa968efda8" args="(int a, int p)" -->
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<td class="memname">static av_always_inline <a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> unsigned <a class="el" href="common_8h.html#a867dba37c785d27d42b272aa968efda8">av_clip_uintp2_c</a> </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>p</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td><code> [static]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Clip a signed integer to an unsigned power of two range. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">a</td><td>value to clip </td></tr>
<tr><td class="paramname">p</td><td>bit position to clip at </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>clipped value </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00207">207</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
</div>
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<a class="anchor" id="a3cb38786757c8f2a468560d9d7a6c59c"></a><!-- doxytag: member="common.h::av_mod_uintp2_c" ref="a3cb38786757c8f2a468560d9d7a6c59c" args="(unsigned a, unsigned p)" -->
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<td class="memname">static av_always_inline <a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> unsigned <a class="el" href="common_8h.html#a3cb38786757c8f2a468560d9d7a6c59c">av_mod_uintp2_c</a> </td>
<td>(</td>
<td class="paramtype">unsigned </td>
<td class="paramname"><em>a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned </td>
<td class="paramname"><em>p</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td><code> [static]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Clear high bits from an unsigned integer starting with specific bit position. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">a</td><td>value to clip </td></tr>
<tr><td class="paramname">p</td><td>bit position to clip at </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>clipped value </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00219">219</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
</div>
</div>
<a class="anchor" id="a2ff75b1bf7fd1a261dd2f2919e8d23e1"></a><!-- doxytag: member="common.h::av_sat_add32_c" ref="a2ff75b1bf7fd1a261dd2f2919e8d23e1" args="(int a, int b)" -->
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<td class="memname">static av_always_inline int <a class="el" href="common_8h.html#a2ff75b1bf7fd1a261dd2f2919e8d23e1">av_sat_add32_c</a> </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>b</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td><code> [static]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Add two signed 32-bit values with saturation. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">a</td><td>one value </td></tr>
<tr><td class="paramname">b</td><td>another value </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>sum with signed saturation </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00231">231</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
</div>
</div>
<a class="anchor" id="af235b48678850832493ac21160ff8458"></a><!-- doxytag: member="common.h::av_sat_dadd32_c" ref="af235b48678850832493ac21160ff8458" args="(int a, int b)" -->
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<td class="memname">static av_always_inline int <a class="el" href="common_8h.html#af235b48678850832493ac21160ff8458">av_sat_dadd32_c</a> </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>b</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td><code> [static]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Add a doubled value to another value with saturation at both stages. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">a</td><td>first value </td></tr>
<tr><td class="paramname">b</td><td>value doubled and added to a </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>sum with signed saturation </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00243">243</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
</div>
</div>
<a class="anchor" id="a7d5a6331d8708d4516aeab2413f86392"></a><!-- doxytag: member="common.h::av_clipf_c" ref="a7d5a6331d8708d4516aeab2413f86392" args="(float a, float amin, float amax)" -->
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<td class="memname">static av_always_inline <a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> float <a class="el" href="common_8h.html#a7d5a6331d8708d4516aeab2413f86392">av_clipf_c</a> </td>
<td>(</td>
<td class="paramtype">float </td>
<td class="paramname"><em>a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">float </td>
<td class="paramname"><em>amin</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">float </td>
<td class="paramname"><em>amax</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td><code> [static]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Clip a float value into the amin-amax range. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">a</td><td>value to clip </td></tr>
<tr><td class="paramname">amin</td><td>minimum value of the clip range </td></tr>
<tr><td class="paramname">amax</td><td>maximum value of the clip range </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>clipped value </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00255">255</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
</div>
</div>
<a class="anchor" id="a9a257b0d07c767325ee48b5e16e0b97f"></a><!-- doxytag: member="common.h::av_clipd_c" ref="a9a257b0d07c767325ee48b5e16e0b97f" args="(double a, double amin, double amax)" -->
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<td class="memname">static av_always_inline <a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> double <a class="el" href="common_8h.html#a9a257b0d07c767325ee48b5e16e0b97f">av_clipd_c</a> </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>amin</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>amax</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td><code> [static]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Clip a double value into the amin-amax range. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">a</td><td>value to clip </td></tr>
<tr><td class="paramname">amin</td><td>minimum value of the clip range </td></tr>
<tr><td class="paramname">amax</td><td>maximum value of the clip range </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>clipped value </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00272">272</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
</div>
</div>
<a class="anchor" id="ad94b463be296690fc9c096d55203b42b"></a><!-- doxytag: member="common.h::av_ceil_log2_c" ref="ad94b463be296690fc9c096d55203b42b" args="(int x)" -->
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<td class="memname">static av_always_inline <a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int <a class="el" href="common_8h.html#ad94b463be296690fc9c096d55203b42b">av_ceil_log2_c</a> </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>x</em></td><td>)</td>
<td><code> [static]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Compute ceil(log2(x)). </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">x</td><td>value used to compute ceil(log2(x)) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>computed ceiling of log2(x) </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00286">286</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
</div>
</div>
<a class="anchor" id="a73ced2c040c8e53f58a6073c3f3927b5"></a><!-- doxytag: member="common.h::av_popcount_c" ref="a73ced2c040c8e53f58a6073c3f3927b5" args="(uint32_t x)" -->
<div class="memitem">
<div class="memproto">
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<tr>
<td class="memname">static av_always_inline <a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int <a class="el" href="common_8h.html#a73ced2c040c8e53f58a6073c3f3927b5">av_popcount_c</a> </td>
<td>(</td>
<td class="paramtype">uint32_t </td>
<td class="paramname"><em>x</em></td><td>)</td>
<td><code> [static]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Count number of bits set to one in x. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">x</td><td>value to count bits of </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>the number of bits set to one in x </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00296">296</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
</div>
</div>
<a class="anchor" id="a1016d46d60ca2d27d8ab2af5f0f7c57a"></a><!-- doxytag: member="common.h::av_popcount64_c" ref="a1016d46d60ca2d27d8ab2af5f0f7c57a" args="(uint64_t x)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">static av_always_inline <a class="el" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> int <a class="el" href="common_8h.html#a1016d46d60ca2d27d8ab2af5f0f7c57a">av_popcount64_c</a> </td>
<td>(</td>
<td class="paramtype">uint64_t </td>
<td class="paramname"><em>x</em></td><td>)</td>
<td><code> [static]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Count number of bits set to one in x. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">x</td><td>value to count bits of </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>the number of bits set to one in x </dd></dl>
<p>Definition at line <a class="el" href="common_8h_source.html#l00310">310</a> of file <a class="el" href="common_8h_source.html">common.h</a>.</p>
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