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 <span id="projectnumber">2.7.1</span>
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<div class="title">Audio channel layouts</div> </div>
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Defines</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga53d6da2dcd56f5f87c7afd8b33fa15ba">AV_CH_LAYOUT_MONO</a>   (<a class="el" href="group__channel__masks.html#ga88f2868b232a89fd11ad9d6c39d502a1">AV_CH_FRONT_CENTER</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a>   (<a class="el" href="group__channel__masks.html#gaf9c5619f74c99ea8a8606719c01fe7df">AV_CH_FRONT_LEFT</a>|<a class="el" href="group__channel__masks.html#ga394b4b2c87790178bf7b683b45320f31">AV_CH_FRONT_RIGHT</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga03f59e18b3598aa0cab9ed675c287a36">AV_CH_LAYOUT_2POINT1</a>   (<a class="el" href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a>|<a class="el" href="group__channel__masks.html#gab19b66e345cf1f9d50ffc26c28862bcc">AV_CH_LOW_FREQUENCY</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#gad0badd9c9984bc74290f26c2edfdfe44">AV_CH_LAYOUT_2_1</a>   (<a class="el" href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a>|<a class="el" href="group__channel__masks.html#ga68650a364e52edb62d5984dddec4f935">AV_CH_BACK_CENTER</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga625aec7f2285dc35e3ed801e91889564">AV_CH_LAYOUT_SURROUND</a>   (<a class="el" href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a>|<a class="el" href="group__channel__masks.html#ga88f2868b232a89fd11ad9d6c39d502a1">AV_CH_FRONT_CENTER</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#gae3fc8d83d40cfbd4910b16d526beb294">AV_CH_LAYOUT_3POINT1</a>   (<a class="el" href="group__channel__mask__c.html#ga625aec7f2285dc35e3ed801e91889564">AV_CH_LAYOUT_SURROUND</a>|<a class="el" href="group__channel__masks.html#gab19b66e345cf1f9d50ffc26c28862bcc">AV_CH_LOW_FREQUENCY</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga0bcbe41f2d3214b0a3fd2698ebe0caf9">AV_CH_LAYOUT_4POINT0</a>   (<a class="el" href="group__channel__mask__c.html#ga625aec7f2285dc35e3ed801e91889564">AV_CH_LAYOUT_SURROUND</a>|<a class="el" href="group__channel__masks.html#ga68650a364e52edb62d5984dddec4f935">AV_CH_BACK_CENTER</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#gacc48c498c05b3b3c2549f715ba4f1d1b">AV_CH_LAYOUT_4POINT1</a>   (<a class="el" href="group__channel__mask__c.html#ga0bcbe41f2d3214b0a3fd2698ebe0caf9">AV_CH_LAYOUT_4POINT0</a>|<a class="el" href="group__channel__masks.html#gab19b66e345cf1f9d50ffc26c28862bcc">AV_CH_LOW_FREQUENCY</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga5c25ee8b976d0cb15e0b6d2cf923d19d">AV_CH_LAYOUT_2_2</a>   (<a class="el" href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a>|<a class="el" href="group__channel__masks.html#ga02e55f35249dfa57a2e4edfd3acfec4f">AV_CH_SIDE_LEFT</a>|<a class="el" href="group__channel__masks.html#ga947b60ab70c428ebb07c8b9c87023b39">AV_CH_SIDE_RIGHT</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga0982ce29eced939dfcfb5b52416810ae">AV_CH_LAYOUT_QUAD</a>   (<a class="el" href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a>|<a class="el" href="group__channel__masks.html#gaa3cae8c6d0eaab3dc3ce178f6af81ae2">AV_CH_BACK_LEFT</a>|<a class="el" href="group__channel__masks.html#ga7a7ab3bb418bf9672dcdf6554346e5eb">AV_CH_BACK_RIGHT</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga10eddec555bcf849efce5158b0cbdb50">AV_CH_LAYOUT_5POINT0</a>   (<a class="el" href="group__channel__mask__c.html#ga625aec7f2285dc35e3ed801e91889564">AV_CH_LAYOUT_SURROUND</a>|<a class="el" href="group__channel__masks.html#ga02e55f35249dfa57a2e4edfd3acfec4f">AV_CH_SIDE_LEFT</a>|<a class="el" href="group__channel__masks.html#ga947b60ab70c428ebb07c8b9c87023b39">AV_CH_SIDE_RIGHT</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#gac36a042dc21866f9043ce930f300d0df">AV_CH_LAYOUT_5POINT1</a>   (<a class="el" href="group__channel__mask__c.html#ga10eddec555bcf849efce5158b0cbdb50">AV_CH_LAYOUT_5POINT0</a>|<a class="el" href="group__channel__masks.html#gab19b66e345cf1f9d50ffc26c28862bcc">AV_CH_LOW_FREQUENCY</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#gab057e9fd36b7e929d000d663badbafc6">AV_CH_LAYOUT_5POINT0_BACK</a>   (<a class="el" href="group__channel__mask__c.html#ga625aec7f2285dc35e3ed801e91889564">AV_CH_LAYOUT_SURROUND</a>|<a class="el" href="group__channel__masks.html#gaa3cae8c6d0eaab3dc3ce178f6af81ae2">AV_CH_BACK_LEFT</a>|<a class="el" href="group__channel__masks.html#ga7a7ab3bb418bf9672dcdf6554346e5eb">AV_CH_BACK_RIGHT</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#gae9da5d6069701241a22f3af19b152662">AV_CH_LAYOUT_5POINT1_BACK</a>   (<a class="el" href="group__channel__mask__c.html#gab057e9fd36b7e929d000d663badbafc6">AV_CH_LAYOUT_5POINT0_BACK</a>|<a class="el" href="group__channel__masks.html#gab19b66e345cf1f9d50ffc26c28862bcc">AV_CH_LOW_FREQUENCY</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga0fbea70d397140a524b55018128fca77">AV_CH_LAYOUT_6POINT0</a>   (<a class="el" href="group__channel__mask__c.html#ga10eddec555bcf849efce5158b0cbdb50">AV_CH_LAYOUT_5POINT0</a>|<a class="el" href="group__channel__masks.html#ga68650a364e52edb62d5984dddec4f935">AV_CH_BACK_CENTER</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga735985d89e38896a0cb9e5a1e96cb9b8">AV_CH_LAYOUT_6POINT0_FRONT</a>   (<a class="el" href="group__channel__mask__c.html#ga5c25ee8b976d0cb15e0b6d2cf923d19d">AV_CH_LAYOUT_2_2</a>|<a class="el" href="group__channel__masks.html#ga6c9ea2ea60044bfe844174300b237386">AV_CH_FRONT_LEFT_OF_CENTER</a>|<a class="el" href="group__channel__masks.html#ga558dc25b0ce327d2547d3cc9e4bd6a4e">AV_CH_FRONT_RIGHT_OF_CENTER</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga44e719835fe17c5af5e619083918d1ca">AV_CH_LAYOUT_HEXAGONAL</a>   (<a class="el" href="group__channel__mask__c.html#gab057e9fd36b7e929d000d663badbafc6">AV_CH_LAYOUT_5POINT0_BACK</a>|<a class="el" href="group__channel__masks.html#ga68650a364e52edb62d5984dddec4f935">AV_CH_BACK_CENTER</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga0b63b18f49c294bfbc22afa8b59b6685">AV_CH_LAYOUT_6POINT1</a>   (<a class="el" href="group__channel__mask__c.html#gac36a042dc21866f9043ce930f300d0df">AV_CH_LAYOUT_5POINT1</a>|<a class="el" href="group__channel__masks.html#ga68650a364e52edb62d5984dddec4f935">AV_CH_BACK_CENTER</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#gaaf1920f827888aeb99540f3ee5a78cea">AV_CH_LAYOUT_6POINT1_BACK</a>   (<a class="el" href="group__channel__mask__c.html#gae9da5d6069701241a22f3af19b152662">AV_CH_LAYOUT_5POINT1_BACK</a>|<a class="el" href="group__channel__masks.html#ga68650a364e52edb62d5984dddec4f935">AV_CH_BACK_CENTER</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga934ec29833f0cbc4a1fe8f97cc914664">AV_CH_LAYOUT_6POINT1_FRONT</a>   (<a class="el" href="group__channel__mask__c.html#ga735985d89e38896a0cb9e5a1e96cb9b8">AV_CH_LAYOUT_6POINT0_FRONT</a>|<a class="el" href="group__channel__masks.html#gab19b66e345cf1f9d50ffc26c28862bcc">AV_CH_LOW_FREQUENCY</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#gab843d4e87bc747c7a81f082589023f98">AV_CH_LAYOUT_7POINT0</a>   (<a class="el" href="group__channel__mask__c.html#ga10eddec555bcf849efce5158b0cbdb50">AV_CH_LAYOUT_5POINT0</a>|<a class="el" href="group__channel__masks.html#gaa3cae8c6d0eaab3dc3ce178f6af81ae2">AV_CH_BACK_LEFT</a>|<a class="el" href="group__channel__masks.html#ga7a7ab3bb418bf9672dcdf6554346e5eb">AV_CH_BACK_RIGHT</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#gaa4c21d7abb460730295f99c7f0098259">AV_CH_LAYOUT_7POINT0_FRONT</a>   (<a class="el" href="group__channel__mask__c.html#ga10eddec555bcf849efce5158b0cbdb50">AV_CH_LAYOUT_5POINT0</a>|<a class="el" href="group__channel__masks.html#ga6c9ea2ea60044bfe844174300b237386">AV_CH_FRONT_LEFT_OF_CENTER</a>|<a class="el" href="group__channel__masks.html#ga558dc25b0ce327d2547d3cc9e4bd6a4e">AV_CH_FRONT_RIGHT_OF_CENTER</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga2006ce652a95bad74291db52fa346464">AV_CH_LAYOUT_7POINT1</a>   (<a class="el" href="group__channel__mask__c.html#gac36a042dc21866f9043ce930f300d0df">AV_CH_LAYOUT_5POINT1</a>|<a class="el" href="group__channel__masks.html#gaa3cae8c6d0eaab3dc3ce178f6af81ae2">AV_CH_BACK_LEFT</a>|<a class="el" href="group__channel__masks.html#ga7a7ab3bb418bf9672dcdf6554346e5eb">AV_CH_BACK_RIGHT</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga883478469aa86f5c3f57ce864a12745b">AV_CH_LAYOUT_7POINT1_WIDE</a>   (<a class="el" href="group__channel__mask__c.html#gac36a042dc21866f9043ce930f300d0df">AV_CH_LAYOUT_5POINT1</a>|<a class="el" href="group__channel__masks.html#ga6c9ea2ea60044bfe844174300b237386">AV_CH_FRONT_LEFT_OF_CENTER</a>|<a class="el" href="group__channel__masks.html#ga558dc25b0ce327d2547d3cc9e4bd6a4e">AV_CH_FRONT_RIGHT_OF_CENTER</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga9702d40a7d1f6e2b00e02d8ecb83bd63">AV_CH_LAYOUT_7POINT1_WIDE_BACK</a>   (<a class="el" href="group__channel__mask__c.html#gae9da5d6069701241a22f3af19b152662">AV_CH_LAYOUT_5POINT1_BACK</a>|<a class="el" href="group__channel__masks.html#ga6c9ea2ea60044bfe844174300b237386">AV_CH_FRONT_LEFT_OF_CENTER</a>|<a class="el" href="group__channel__masks.html#ga558dc25b0ce327d2547d3cc9e4bd6a4e">AV_CH_FRONT_RIGHT_OF_CENTER</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#gaa760931c084e33a254fca038b7de8dae">AV_CH_LAYOUT_OCTAGONAL</a>   (<a class="el" href="group__channel__mask__c.html#ga10eddec555bcf849efce5158b0cbdb50">AV_CH_LAYOUT_5POINT0</a>|<a class="el" href="group__channel__masks.html#gaa3cae8c6d0eaab3dc3ce178f6af81ae2">AV_CH_BACK_LEFT</a>|<a class="el" href="group__channel__masks.html#ga68650a364e52edb62d5984dddec4f935">AV_CH_BACK_CENTER</a>|<a class="el" href="group__channel__masks.html#ga7a7ab3bb418bf9672dcdf6554346e5eb">AV_CH_BACK_RIGHT</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga3004e784b29fd907a0d4aebeca0e6933">AV_CH_LAYOUT_STEREO_DOWNMIX</a>   (<a class="el" href="group__channel__masks.html#gaea8f62dcaa4774307a8fa9b52172c688">AV_CH_STEREO_LEFT</a>|<a class="el" href="group__channel__masks.html#gab68e7edb9182b1b22898b960707143c1">AV_CH_STEREO_RIGHT</a>)</td></tr>
<tr><td colspan="2"><h2><a name="enum-members"></a>
Enumerations</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#gabd576ea664e3ac5d31f3362064fe13e6">AVMatrixEncoding</a> { <br/>
  <a class="el" href="group__channel__mask__c.html#ggabd576ea664e3ac5d31f3362064fe13e6a04179fd7b3339556603020ae88e02793">AV_MATRIX_ENCODING_NONE</a>,
<a class="el" href="group__channel__mask__c.html#ggabd576ea664e3ac5d31f3362064fe13e6a0578f715ed49986a6e4c40884c174dbd">AV_MATRIX_ENCODING_DOLBY</a>,
<a class="el" href="group__channel__mask__c.html#ggabd576ea664e3ac5d31f3362064fe13e6a068d30f3ce95f82781b0052bf86bc10e">AV_MATRIX_ENCODING_DPLII</a>,
<a class="el" href="group__channel__mask__c.html#ggabd576ea664e3ac5d31f3362064fe13e6a03124652d3e9efb6ce687971c7abbfa1">AV_MATRIX_ENCODING_DPLIIX</a>,
<br/>
  <a class="el" href="group__channel__mask__c.html#ggabd576ea664e3ac5d31f3362064fe13e6a927893de2c83ddb117fb89dcc579e363">AV_MATRIX_ENCODING_DPLIIZ</a>,
<a class="el" href="group__channel__mask__c.html#ggabd576ea664e3ac5d31f3362064fe13e6aa155505a7fb9f2b45778b1d7776dcfb7">AV_MATRIX_ENCODING_DOLBYEX</a>,
<a class="el" href="group__channel__mask__c.html#ggabd576ea664e3ac5d31f3362064fe13e6ad9089736c1dd449617a2805d37e502d3">AV_MATRIX_ENCODING_DOLBYHEADPHONE</a>,
<a class="el" href="group__channel__mask__c.html#ggabd576ea664e3ac5d31f3362064fe13e6a3a3acaf62825a3b21c7631ddf1dcc648">AV_MATRIX_ENCODING_NB</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">uint64_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga3e8a7ab3d4c1ac98b902ab6b00741343">av_get_channel_layout</a> (const char *name)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return a channel layout id that matches name, or 0 if no match is found. <a href="#ga3e8a7ab3d4c1ac98b902ab6b00741343"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga99d0b5bb80534d13a6cc96336cf9076a">av_get_channel_layout_string</a> (char *buf, int buf_size, int nb_channels, uint64_t channel_layout)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return a description of a channel layout. <a href="#ga99d0b5bb80534d13a6cc96336cf9076a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga48cdbfac1bbb45835eae8bcdc9877b0e">av_bprint_channel_layout</a> (struct AVBPrint *bp, int nb_channels, uint64_t channel_layout)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Append a description of a channel layout to a bprint buffer. <a href="#ga48cdbfac1bbb45835eae8bcdc9877b0e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#gac95619abeb32e4a3daa18e3ff3419380">av_get_channel_layout_nb_channels</a> (uint64_t channel_layout)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return the number of channels in the channel layout. <a href="#gac95619abeb32e4a3daa18e3ff3419380"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int64_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#gacb84f3e93a583e1f84a5283162a606a2">av_get_default_channel_layout</a> (int nb_channels)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return default channel layout for a given number of channels. <a href="#gacb84f3e93a583e1f84a5283162a606a2"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga0669978493902b5ae723e386013da3ce">av_get_channel_layout_channel_index</a> (uint64_t channel_layout, uint64_t channel)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the index of a channel in channel_layout. <a href="#ga0669978493902b5ae723e386013da3ce"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">uint64_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#gaf492843360fb4ecee6b5ec4166b04fcd">av_channel_layout_extract_channel</a> (uint64_t channel_layout, int index)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the channel with the given index in channel_layout. <a href="#gaf492843360fb4ecee6b5ec4166b04fcd"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#gaf9a5e23a9bbf5909f2dc84b25d78e35e">av_get_channel_name</a> (uint64_t channel)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the name of a given channel. <a href="#gaf9a5e23a9bbf5909f2dc84b25d78e35e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#gade4b74b99e3fb954b88b0cb8eddb785a">av_get_channel_description</a> (uint64_t channel)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the description of a given channel. <a href="#gade4b74b99e3fb954b88b0cb8eddb785a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__channel__mask__c.html#ga00447bfae43d690f1f549a9e2521bf85">av_get_standard_channel_layout</a> (unsigned index, uint64_t *layout, const char **name)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the value and name of a standard channel layout. <a href="#ga00447bfae43d690f1f549a9e2521bf85"></a><br/></td></tr>
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<hr/><h2>Define Documentation</h2>
<a class="anchor" id="ga53d6da2dcd56f5f87c7afd8b33fa15ba"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_MONO" ref="ga53d6da2dcd56f5f87c7afd8b33fa15ba" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#ga53d6da2dcd56f5f87c7afd8b33fa15ba">AV_CH_LAYOUT_MONO</a>   (<a class="el" href="group__channel__masks.html#ga88f2868b232a89fd11ad9d6c39d502a1">AV_CH_FRONT_CENTER</a>)</td>
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<div class="memdoc">
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="filtering_audio_8c-example.html#a30">filtering_audio.c</a>.</dd>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00085">85</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
<p>Referenced by <a class="el" href="filtering__audio_8c_source.html#l00085">init_filters()</a>.</p>
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</div>
<a class="anchor" id="gabc6d6651bba254cd0fa2c42a57228e65"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_STEREO" ref="gabc6d6651bba254cd0fa2c42a57228e65" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a>   (<a class="el" href="group__channel__masks.html#gaf9c5619f74c99ea8a8606719c01fe7df">AV_CH_FRONT_LEFT</a>|<a class="el" href="group__channel__masks.html#ga394b4b2c87790178bf7b683b45320f31">AV_CH_FRONT_RIGHT</a>)</td>
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<div class="memdoc">
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="decoding_encoding_8c-example.html#a9">decoding_encoding.c</a>, <a class="el" href="filter_audio_8c-example.html#a27">filter_audio.c</a>, <a class="el" href="muxing_8c-example.html#a48">muxing.c</a>, and <a class="el" href="resampling_audio_8c-example.html#a12">resampling_audio.c</a>.</dd>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00086">86</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
<p>Referenced by <a class="el" href="muxing_8c_source.html#l00092">add_stream()</a>, <a class="el" href="filter__audio_8c_source.html#l00062">init_filter_graph()</a>, <a class="el" href="resampling__audio_8c_source.html#l00081">main()</a>, and <a class="el" href="decoding__encoding_8c_source.html#l00078">select_channel_layout()</a>.</p>
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<a class="anchor" id="ga03f59e18b3598aa0cab9ed675c287a36"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_2POINT1" ref="ga03f59e18b3598aa0cab9ed675c287a36" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#ga03f59e18b3598aa0cab9ed675c287a36">AV_CH_LAYOUT_2POINT1</a>   (<a class="el" href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a>|<a class="el" href="group__channel__masks.html#gab19b66e345cf1f9d50ffc26c28862bcc">AV_CH_LOW_FREQUENCY</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00087">87</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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<a class="anchor" id="gad0badd9c9984bc74290f26c2edfdfe44"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_2_1" ref="gad0badd9c9984bc74290f26c2edfdfe44" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#gad0badd9c9984bc74290f26c2edfdfe44">AV_CH_LAYOUT_2_1</a>   (<a class="el" href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a>|<a class="el" href="group__channel__masks.html#ga68650a364e52edb62d5984dddec4f935">AV_CH_BACK_CENTER</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00088">88</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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<a class="anchor" id="ga625aec7f2285dc35e3ed801e91889564"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_SURROUND" ref="ga625aec7f2285dc35e3ed801e91889564" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#ga625aec7f2285dc35e3ed801e91889564">AV_CH_LAYOUT_SURROUND</a>   (<a class="el" href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a>|<a class="el" href="group__channel__masks.html#ga88f2868b232a89fd11ad9d6c39d502a1">AV_CH_FRONT_CENTER</a>)</td>
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<dl><dt><b>Examples: </b></dt><dd><a class="el" href="resampling_audio_8c-example.html#a13">resampling_audio.c</a>.</dd>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00089">89</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
<p>Referenced by <a class="el" href="resampling__audio_8c_source.html#l00081">main()</a>.</p>
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<a class="anchor" id="gae3fc8d83d40cfbd4910b16d526beb294"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_3POINT1" ref="gae3fc8d83d40cfbd4910b16d526beb294" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#gae3fc8d83d40cfbd4910b16d526beb294">AV_CH_LAYOUT_3POINT1</a>   (<a class="el" href="group__channel__mask__c.html#ga625aec7f2285dc35e3ed801e91889564">AV_CH_LAYOUT_SURROUND</a>|<a class="el" href="group__channel__masks.html#gab19b66e345cf1f9d50ffc26c28862bcc">AV_CH_LOW_FREQUENCY</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00090">90</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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<a class="anchor" id="ga0bcbe41f2d3214b0a3fd2698ebe0caf9"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_4POINT0" ref="ga0bcbe41f2d3214b0a3fd2698ebe0caf9" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#ga0bcbe41f2d3214b0a3fd2698ebe0caf9">AV_CH_LAYOUT_4POINT0</a>   (<a class="el" href="group__channel__mask__c.html#ga625aec7f2285dc35e3ed801e91889564">AV_CH_LAYOUT_SURROUND</a>|<a class="el" href="group__channel__masks.html#ga68650a364e52edb62d5984dddec4f935">AV_CH_BACK_CENTER</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00091">91</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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<a class="anchor" id="gacc48c498c05b3b3c2549f715ba4f1d1b"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_4POINT1" ref="gacc48c498c05b3b3c2549f715ba4f1d1b" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#gacc48c498c05b3b3c2549f715ba4f1d1b">AV_CH_LAYOUT_4POINT1</a>   (<a class="el" href="group__channel__mask__c.html#ga0bcbe41f2d3214b0a3fd2698ebe0caf9">AV_CH_LAYOUT_4POINT0</a>|<a class="el" href="group__channel__masks.html#gab19b66e345cf1f9d50ffc26c28862bcc">AV_CH_LOW_FREQUENCY</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00092">92</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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<a class="anchor" id="ga5c25ee8b976d0cb15e0b6d2cf923d19d"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_2_2" ref="ga5c25ee8b976d0cb15e0b6d2cf923d19d" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#ga5c25ee8b976d0cb15e0b6d2cf923d19d">AV_CH_LAYOUT_2_2</a>   (<a class="el" href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a>|<a class="el" href="group__channel__masks.html#ga02e55f35249dfa57a2e4edfd3acfec4f">AV_CH_SIDE_LEFT</a>|<a class="el" href="group__channel__masks.html#ga947b60ab70c428ebb07c8b9c87023b39">AV_CH_SIDE_RIGHT</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00093">93</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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<a class="anchor" id="ga0982ce29eced939dfcfb5b52416810ae"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_QUAD" ref="ga0982ce29eced939dfcfb5b52416810ae" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#ga0982ce29eced939dfcfb5b52416810ae">AV_CH_LAYOUT_QUAD</a>   (<a class="el" href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a>|<a class="el" href="group__channel__masks.html#gaa3cae8c6d0eaab3dc3ce178f6af81ae2">AV_CH_BACK_LEFT</a>|<a class="el" href="group__channel__masks.html#ga7a7ab3bb418bf9672dcdf6554346e5eb">AV_CH_BACK_RIGHT</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00094">94</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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<a class="anchor" id="ga10eddec555bcf849efce5158b0cbdb50"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_5POINT0" ref="ga10eddec555bcf849efce5158b0cbdb50" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#ga10eddec555bcf849efce5158b0cbdb50">AV_CH_LAYOUT_5POINT0</a>   (<a class="el" href="group__channel__mask__c.html#ga625aec7f2285dc35e3ed801e91889564">AV_CH_LAYOUT_SURROUND</a>|<a class="el" href="group__channel__masks.html#ga02e55f35249dfa57a2e4edfd3acfec4f">AV_CH_SIDE_LEFT</a>|<a class="el" href="group__channel__masks.html#ga947b60ab70c428ebb07c8b9c87023b39">AV_CH_SIDE_RIGHT</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00095">95</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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<a class="anchor" id="gac36a042dc21866f9043ce930f300d0df"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_5POINT1" ref="gac36a042dc21866f9043ce930f300d0df" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#gac36a042dc21866f9043ce930f300d0df">AV_CH_LAYOUT_5POINT1</a>   (<a class="el" href="group__channel__mask__c.html#ga10eddec555bcf849efce5158b0cbdb50">AV_CH_LAYOUT_5POINT0</a>|<a class="el" href="group__channel__masks.html#gab19b66e345cf1f9d50ffc26c28862bcc">AV_CH_LOW_FREQUENCY</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00096">96</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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<a class="anchor" id="gab057e9fd36b7e929d000d663badbafc6"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_5POINT0_BACK" ref="gab057e9fd36b7e929d000d663badbafc6" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#gab057e9fd36b7e929d000d663badbafc6">AV_CH_LAYOUT_5POINT0_BACK</a>   (<a class="el" href="group__channel__mask__c.html#ga625aec7f2285dc35e3ed801e91889564">AV_CH_LAYOUT_SURROUND</a>|<a class="el" href="group__channel__masks.html#gaa3cae8c6d0eaab3dc3ce178f6af81ae2">AV_CH_BACK_LEFT</a>|<a class="el" href="group__channel__masks.html#ga7a7ab3bb418bf9672dcdf6554346e5eb">AV_CH_BACK_RIGHT</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00097">97</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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<a class="anchor" id="gae9da5d6069701241a22f3af19b152662"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_5POINT1_BACK" ref="gae9da5d6069701241a22f3af19b152662" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#gae9da5d6069701241a22f3af19b152662">AV_CH_LAYOUT_5POINT1_BACK</a>   (<a class="el" href="group__channel__mask__c.html#gab057e9fd36b7e929d000d663badbafc6">AV_CH_LAYOUT_5POINT0_BACK</a>|<a class="el" href="group__channel__masks.html#gab19b66e345cf1f9d50ffc26c28862bcc">AV_CH_LOW_FREQUENCY</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00098">98</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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<a class="anchor" id="ga0fbea70d397140a524b55018128fca77"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_6POINT0" ref="ga0fbea70d397140a524b55018128fca77" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#ga0fbea70d397140a524b55018128fca77">AV_CH_LAYOUT_6POINT0</a>   (<a class="el" href="group__channel__mask__c.html#ga10eddec555bcf849efce5158b0cbdb50">AV_CH_LAYOUT_5POINT0</a>|<a class="el" href="group__channel__masks.html#ga68650a364e52edb62d5984dddec4f935">AV_CH_BACK_CENTER</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00099">99</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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<a class="anchor" id="ga735985d89e38896a0cb9e5a1e96cb9b8"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_6POINT0_FRONT" ref="ga735985d89e38896a0cb9e5a1e96cb9b8" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#ga735985d89e38896a0cb9e5a1e96cb9b8">AV_CH_LAYOUT_6POINT0_FRONT</a>   (<a class="el" href="group__channel__mask__c.html#ga5c25ee8b976d0cb15e0b6d2cf923d19d">AV_CH_LAYOUT_2_2</a>|<a class="el" href="group__channel__masks.html#ga6c9ea2ea60044bfe844174300b237386">AV_CH_FRONT_LEFT_OF_CENTER</a>|<a class="el" href="group__channel__masks.html#ga558dc25b0ce327d2547d3cc9e4bd6a4e">AV_CH_FRONT_RIGHT_OF_CENTER</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00100">100</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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</div>
<a class="anchor" id="ga44e719835fe17c5af5e619083918d1ca"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_HEXAGONAL" ref="ga44e719835fe17c5af5e619083918d1ca" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#ga44e719835fe17c5af5e619083918d1ca">AV_CH_LAYOUT_HEXAGONAL</a>   (<a class="el" href="group__channel__mask__c.html#gab057e9fd36b7e929d000d663badbafc6">AV_CH_LAYOUT_5POINT0_BACK</a>|<a class="el" href="group__channel__masks.html#ga68650a364e52edb62d5984dddec4f935">AV_CH_BACK_CENTER</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00101">101</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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</div>
<a class="anchor" id="ga0b63b18f49c294bfbc22afa8b59b6685"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_6POINT1" ref="ga0b63b18f49c294bfbc22afa8b59b6685" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#ga0b63b18f49c294bfbc22afa8b59b6685">AV_CH_LAYOUT_6POINT1</a>   (<a class="el" href="group__channel__mask__c.html#gac36a042dc21866f9043ce930f300d0df">AV_CH_LAYOUT_5POINT1</a>|<a class="el" href="group__channel__masks.html#ga68650a364e52edb62d5984dddec4f935">AV_CH_BACK_CENTER</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00102">102</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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</div>
<a class="anchor" id="gaaf1920f827888aeb99540f3ee5a78cea"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_6POINT1_BACK" ref="gaaf1920f827888aeb99540f3ee5a78cea" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#gaaf1920f827888aeb99540f3ee5a78cea">AV_CH_LAYOUT_6POINT1_BACK</a>   (<a class="el" href="group__channel__mask__c.html#gae9da5d6069701241a22f3af19b152662">AV_CH_LAYOUT_5POINT1_BACK</a>|<a class="el" href="group__channel__masks.html#ga68650a364e52edb62d5984dddec4f935">AV_CH_BACK_CENTER</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00103">103</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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</div>
<a class="anchor" id="ga934ec29833f0cbc4a1fe8f97cc914664"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_6POINT1_FRONT" ref="ga934ec29833f0cbc4a1fe8f97cc914664" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#ga934ec29833f0cbc4a1fe8f97cc914664">AV_CH_LAYOUT_6POINT1_FRONT</a>   (<a class="el" href="group__channel__mask__c.html#ga735985d89e38896a0cb9e5a1e96cb9b8">AV_CH_LAYOUT_6POINT0_FRONT</a>|<a class="el" href="group__channel__masks.html#gab19b66e345cf1f9d50ffc26c28862bcc">AV_CH_LOW_FREQUENCY</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00104">104</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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</div>
<a class="anchor" id="gab843d4e87bc747c7a81f082589023f98"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_7POINT0" ref="gab843d4e87bc747c7a81f082589023f98" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#gab843d4e87bc747c7a81f082589023f98">AV_CH_LAYOUT_7POINT0</a>   (<a class="el" href="group__channel__mask__c.html#ga10eddec555bcf849efce5158b0cbdb50">AV_CH_LAYOUT_5POINT0</a>|<a class="el" href="group__channel__masks.html#gaa3cae8c6d0eaab3dc3ce178f6af81ae2">AV_CH_BACK_LEFT</a>|<a class="el" href="group__channel__masks.html#ga7a7ab3bb418bf9672dcdf6554346e5eb">AV_CH_BACK_RIGHT</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00105">105</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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</div>
<a class="anchor" id="gaa4c21d7abb460730295f99c7f0098259"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_7POINT0_FRONT" ref="gaa4c21d7abb460730295f99c7f0098259" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#gaa4c21d7abb460730295f99c7f0098259">AV_CH_LAYOUT_7POINT0_FRONT</a>   (<a class="el" href="group__channel__mask__c.html#ga10eddec555bcf849efce5158b0cbdb50">AV_CH_LAYOUT_5POINT0</a>|<a class="el" href="group__channel__masks.html#ga6c9ea2ea60044bfe844174300b237386">AV_CH_FRONT_LEFT_OF_CENTER</a>|<a class="el" href="group__channel__masks.html#ga558dc25b0ce327d2547d3cc9e4bd6a4e">AV_CH_FRONT_RIGHT_OF_CENTER</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00106">106</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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<a class="anchor" id="ga2006ce652a95bad74291db52fa346464"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_7POINT1" ref="ga2006ce652a95bad74291db52fa346464" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#ga2006ce652a95bad74291db52fa346464">AV_CH_LAYOUT_7POINT1</a>   (<a class="el" href="group__channel__mask__c.html#gac36a042dc21866f9043ce930f300d0df">AV_CH_LAYOUT_5POINT1</a>|<a class="el" href="group__channel__masks.html#gaa3cae8c6d0eaab3dc3ce178f6af81ae2">AV_CH_BACK_LEFT</a>|<a class="el" href="group__channel__masks.html#ga7a7ab3bb418bf9672dcdf6554346e5eb">AV_CH_BACK_RIGHT</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00107">107</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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</div>
<a class="anchor" id="ga883478469aa86f5c3f57ce864a12745b"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_7POINT1_WIDE" ref="ga883478469aa86f5c3f57ce864a12745b" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#ga883478469aa86f5c3f57ce864a12745b">AV_CH_LAYOUT_7POINT1_WIDE</a>   (<a class="el" href="group__channel__mask__c.html#gac36a042dc21866f9043ce930f300d0df">AV_CH_LAYOUT_5POINT1</a>|<a class="el" href="group__channel__masks.html#ga6c9ea2ea60044bfe844174300b237386">AV_CH_FRONT_LEFT_OF_CENTER</a>|<a class="el" href="group__channel__masks.html#ga558dc25b0ce327d2547d3cc9e4bd6a4e">AV_CH_FRONT_RIGHT_OF_CENTER</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00108">108</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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</div>
<a class="anchor" id="ga9702d40a7d1f6e2b00e02d8ecb83bd63"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_7POINT1_WIDE_BACK" ref="ga9702d40a7d1f6e2b00e02d8ecb83bd63" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#ga9702d40a7d1f6e2b00e02d8ecb83bd63">AV_CH_LAYOUT_7POINT1_WIDE_BACK</a>   (<a class="el" href="group__channel__mask__c.html#gae9da5d6069701241a22f3af19b152662">AV_CH_LAYOUT_5POINT1_BACK</a>|<a class="el" href="group__channel__masks.html#ga6c9ea2ea60044bfe844174300b237386">AV_CH_FRONT_LEFT_OF_CENTER</a>|<a class="el" href="group__channel__masks.html#ga558dc25b0ce327d2547d3cc9e4bd6a4e">AV_CH_FRONT_RIGHT_OF_CENTER</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00109">109</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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<a class="anchor" id="gaa760931c084e33a254fca038b7de8dae"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_OCTAGONAL" ref="gaa760931c084e33a254fca038b7de8dae" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#gaa760931c084e33a254fca038b7de8dae">AV_CH_LAYOUT_OCTAGONAL</a>   (<a class="el" href="group__channel__mask__c.html#ga10eddec555bcf849efce5158b0cbdb50">AV_CH_LAYOUT_5POINT0</a>|<a class="el" href="group__channel__masks.html#gaa3cae8c6d0eaab3dc3ce178f6af81ae2">AV_CH_BACK_LEFT</a>|<a class="el" href="group__channel__masks.html#ga68650a364e52edb62d5984dddec4f935">AV_CH_BACK_CENTER</a>|<a class="el" href="group__channel__masks.html#ga7a7ab3bb418bf9672dcdf6554346e5eb">AV_CH_BACK_RIGHT</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00110">110</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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<a class="anchor" id="ga3004e784b29fd907a0d4aebeca0e6933"></a><!-- doxytag: member="channel_layout.h::AV_CH_LAYOUT_STEREO_DOWNMIX" ref="ga3004e784b29fd907a0d4aebeca0e6933" args="" -->
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<td class="memname">#define <a class="el" href="group__channel__mask__c.html#ga3004e784b29fd907a0d4aebeca0e6933">AV_CH_LAYOUT_STEREO_DOWNMIX</a>   (<a class="el" href="group__channel__masks.html#gaea8f62dcaa4774307a8fa9b52172c688">AV_CH_STEREO_LEFT</a>|<a class="el" href="group__channel__masks.html#gab68e7edb9182b1b22898b960707143c1">AV_CH_STEREO_RIGHT</a>)</td>
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<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00111">111</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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<hr/><h2>Enumeration Type Documentation</h2>
<a class="anchor" id="gabd576ea664e3ac5d31f3362064fe13e6"></a><!-- doxytag: member="channel_layout.h::AVMatrixEncoding" ref="gabd576ea664e3ac5d31f3362064fe13e6" args="" -->
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<td class="memname">enum <a class="el" href="group__channel__mask__c.html#gabd576ea664e3ac5d31f3362064fe13e6">AVMatrixEncoding</a></td>
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<dl><dt><b>Enumerator: </b></dt><dd><table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><em><a class="anchor" id="ggabd576ea664e3ac5d31f3362064fe13e6a04179fd7b3339556603020ae88e02793"></a><!-- doxytag: member="AV_MATRIX_ENCODING_NONE" ref="ggabd576ea664e3ac5d31f3362064fe13e6a04179fd7b3339556603020ae88e02793" args="" -->AV_MATRIX_ENCODING_NONE</em> </td><td>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="ggabd576ea664e3ac5d31f3362064fe13e6a0578f715ed49986a6e4c40884c174dbd"></a><!-- doxytag: member="AV_MATRIX_ENCODING_DOLBY" ref="ggabd576ea664e3ac5d31f3362064fe13e6a0578f715ed49986a6e4c40884c174dbd" args="" -->AV_MATRIX_ENCODING_DOLBY</em> </td><td>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="ggabd576ea664e3ac5d31f3362064fe13e6a068d30f3ce95f82781b0052bf86bc10e"></a><!-- doxytag: member="AV_MATRIX_ENCODING_DPLII" ref="ggabd576ea664e3ac5d31f3362064fe13e6a068d30f3ce95f82781b0052bf86bc10e" args="" -->AV_MATRIX_ENCODING_DPLII</em> </td><td>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="ggabd576ea664e3ac5d31f3362064fe13e6a03124652d3e9efb6ce687971c7abbfa1"></a><!-- doxytag: member="AV_MATRIX_ENCODING_DPLIIX" ref="ggabd576ea664e3ac5d31f3362064fe13e6a03124652d3e9efb6ce687971c7abbfa1" args="" -->AV_MATRIX_ENCODING_DPLIIX</em> </td><td>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="ggabd576ea664e3ac5d31f3362064fe13e6a927893de2c83ddb117fb89dcc579e363"></a><!-- doxytag: member="AV_MATRIX_ENCODING_DPLIIZ" ref="ggabd576ea664e3ac5d31f3362064fe13e6a927893de2c83ddb117fb89dcc579e363" args="" -->AV_MATRIX_ENCODING_DPLIIZ</em> </td><td>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="ggabd576ea664e3ac5d31f3362064fe13e6aa155505a7fb9f2b45778b1d7776dcfb7"></a><!-- doxytag: member="AV_MATRIX_ENCODING_DOLBYEX" ref="ggabd576ea664e3ac5d31f3362064fe13e6aa155505a7fb9f2b45778b1d7776dcfb7" args="" -->AV_MATRIX_ENCODING_DOLBYEX</em> </td><td>
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<tr><td valign="top"><em><a class="anchor" id="ggabd576ea664e3ac5d31f3362064fe13e6ad9089736c1dd449617a2805d37e502d3"></a><!-- doxytag: member="AV_MATRIX_ENCODING_DOLBYHEADPHONE" ref="ggabd576ea664e3ac5d31f3362064fe13e6ad9089736c1dd449617a2805d37e502d3" args="" -->AV_MATRIX_ENCODING_DOLBYHEADPHONE</em> </td><td>
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<tr><td valign="top"><em><a class="anchor" id="ggabd576ea664e3ac5d31f3362064fe13e6a3a3acaf62825a3b21c7631ddf1dcc648"></a><!-- doxytag: member="AV_MATRIX_ENCODING_NB" ref="ggabd576ea664e3ac5d31f3362064fe13e6a3a3acaf62825a3b21c7631ddf1dcc648" args="" -->AV_MATRIX_ENCODING_NB</em> </td><td>
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</dd>
</dl>
<p>Definition at line <a class="el" href="channel__layout_8h_source.html#l00113">113</a> of file <a class="el" href="channel__layout_8h_source.html">channel_layout.h</a>.</p>
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<hr/><h2>Function Documentation</h2>
<a class="anchor" id="ga3e8a7ab3d4c1ac98b902ab6b00741343"></a><!-- doxytag: member="channel_layout.h::av_get_channel_layout" ref="ga3e8a7ab3d4c1ac98b902ab6b00741343" args="(const char *name)" -->
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<td class="memname">uint64_t <a class="el" href="group__channel__mask__c.html#ga3e8a7ab3d4c1ac98b902ab6b00741343">av_get_channel_layout</a> </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>name</em></td><td>)</td>
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<p>Return a channel layout id that matches name, or 0 if no match is found. </p>
<p>name can be one or several of the following notations, separated by '+' or '|':</p>
<ul>
<li>the name of an usual channel layout (mono, stereo, 4.0, quad, 5.0, 5.0(side), 5.1, 5.1(side), 7.1, 7.1(wide), downmix);</li>
<li>the name of a single channel (FL, FR, FC, LFE, BL, BR, FLC, FRC, BC, SL, SR, TC, TFL, TFC, TFR, TBL, TBC, TBR, DL, DR);</li>
<li>a number of channels, in decimal, optionally followed by 'c', yielding the default channel layout for that number of channels (<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="group__channel__mask__c.html#gacb84f3e93a583e1f84a5283162a606a2" title="Return default channel layout for a given number of channels.">av_get_default_channel_layout</a>);</dd></dl>
</li>
<li>a channel layout mask, in hexadecimal starting with "0x" (see the AV_CH_* macros).</li>
</ul>
<dl class="warning"><dt><b>Warning:</b></dt><dd>Starting from the next major bump the trailing character 'c' to specify a number of channels will be required, while a channel layout mask could also be specified as a decimal number (if and only if not followed by "c").</dd></dl>
<p>Example: "stereo+FC" = "2c+FC" = "2c+1c" = "0x7" </p>
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<a class="anchor" id="ga99d0b5bb80534d13a6cc96336cf9076a"></a><!-- doxytag: member="channel_layout.h::av_get_channel_layout_string" ref="ga99d0b5bb80534d13a6cc96336cf9076a" args="(char *buf, int buf_size, int nb_channels, uint64_t channel_layout)" -->
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<td class="memname">void <a class="el" href="group__channel__mask__c.html#ga99d0b5bb80534d13a6cc96336cf9076a">av_get_channel_layout_string</a> </td>
<td>(</td>
<td class="paramtype">char * </td>
<td class="paramname"><em>buf</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>buf_size</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>nb_channels</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint64_t </td>
<td class="paramname"><em>channel_layout</em> </td>
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<td>)</td>
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<p>Return a description of a channel layout. </p>
<p>If nb_channels is <= 0, it is guessed from the channel_layout.</p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">buf</td><td>put here the string containing the channel layout </td></tr>
<tr><td class="paramname">buf_size</td><td>size in bytes of the buffer </td></tr>
</table>
</dd>
</dl>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="filter_audio_8c-example.html#a10">filter_audio.c</a>, and <a class="el" href="filtering_audio_8c-example.html#a55">filtering_audio.c</a>.</dd>
</dl>
<p>Referenced by <a class="el" href="filter__audio_8c_source.html#l00062">init_filter_graph()</a>, and <a class="el" href="filtering__audio_8c_source.html#l00085">init_filters()</a>.</p>
</div>
</div>
<a class="anchor" id="ga48cdbfac1bbb45835eae8bcdc9877b0e"></a><!-- doxytag: member="channel_layout.h::av_bprint_channel_layout" ref="ga48cdbfac1bbb45835eae8bcdc9877b0e" args="(struct AVBPrint *bp, int nb_channels, uint64_t channel_layout)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void <a class="el" href="group__channel__mask__c.html#ga48cdbfac1bbb45835eae8bcdc9877b0e">av_bprint_channel_layout</a> </td>
<td>(</td>
<td class="paramtype">struct AVBPrint * </td>
<td class="paramname"><em>bp</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>nb_channels</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint64_t </td>
<td class="paramname"><em>channel_layout</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Append a description of a channel layout to a bprint buffer. </p>
</div>
</div>
<a class="anchor" id="gac95619abeb32e4a3daa18e3ff3419380"></a><!-- doxytag: member="channel_layout.h::av_get_channel_layout_nb_channels" ref="gac95619abeb32e4a3daa18e3ff3419380" args="(uint64_t channel_layout)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int <a class="el" href="group__channel__mask__c.html#gac95619abeb32e4a3daa18e3ff3419380">av_get_channel_layout_nb_channels</a> </td>
<td>(</td>
<td class="paramtype">uint64_t </td>
<td class="paramname"><em>channel_layout</em></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Return the number of channels in the channel layout. </p>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="decoding_encoding_8c-example.html#a10">decoding_encoding.c</a>, <a class="el" href="filter_audio_8c-example.html#a37">filter_audio.c</a>, <a class="el" href="filtering_audio_8c-example.html#a66">filtering_audio.c</a>, <a class="el" href="muxing_8c-example.html#a46">muxing.c</a>, <a class="el" href="resampling_audio_8c-example.html#a18">resampling_audio.c</a>, and <a class="el" href="transcoding_8c-example.html#a45">transcoding.c</a>.</dd>
</dl>
<p>Referenced by <a class="el" href="muxing_8c_source.html#l00092">add_stream()</a>, <a class="el" href="decoding__encoding_8c_source.html#l00103">audio_encode_example()</a>, <a class="el" href="resampling__audio_8c_source.html#l00081">main()</a>, <a class="el" href="transcoding_8c_source.html#l00087">open_output_file()</a>, <a class="el" href="filtering__audio_8c_source.html#l00198">print_frame()</a>, <a class="el" href="filter__audio_8c_source.html#l00215">process_output()</a>, and <a class="el" href="decoding__encoding_8c_source.html#l00078">select_channel_layout()</a>.</p>
</div>
</div>
<a class="anchor" id="gacb84f3e93a583e1f84a5283162a606a2"></a><!-- doxytag: member="channel_layout.h::av_get_default_channel_layout" ref="gacb84f3e93a583e1f84a5283162a606a2" args="(int nb_channels)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int64_t <a class="el" href="group__channel__mask__c.html#gacb84f3e93a583e1f84a5283162a606a2">av_get_default_channel_layout</a> </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>nb_channels</em></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Return default channel layout for a given number of channels. </p>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="filtering_audio_8c-example.html#a37">filtering_audio.c</a>, <a class="el" href="transcode_aac_8c-example.html#a27">transcode_aac.c</a>, and <a class="el" href="transcoding_8c-example.html#a76">transcoding.c</a>.</dd>
</dl>
<p>Referenced by <a class="el" href="transcoding_8c_source.html#l00187">init_filter()</a>, <a class="el" href="filtering__audio_8c_source.html#l00085">init_filters()</a>, <a class="el" href="transcode__aac_8c_source.html#l00237">init_resampler()</a>, and <a class="el" href="transcode__aac_8c_source.html#l00120">open_output_file()</a>.</p>
</div>
</div>
<a class="anchor" id="ga0669978493902b5ae723e386013da3ce"></a><!-- doxytag: member="channel_layout.h::av_get_channel_layout_channel_index" ref="ga0669978493902b5ae723e386013da3ce" args="(uint64_t channel_layout, uint64_t channel)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int <a class="el" href="group__channel__mask__c.html#ga0669978493902b5ae723e386013da3ce">av_get_channel_layout_channel_index</a> </td>
<td>(</td>
<td class="paramtype">uint64_t </td>
<td class="paramname"><em>channel_layout</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint64_t </td>
<td class="paramname"><em>channel</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Get the index of a channel in channel_layout. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">channel</td><td>a channel layout describing exactly one channel which must be present in channel_layout.</td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>index of channel in channel_layout on success, a negative AVERROR on error. </dd></dl>
</div>
</div>
<a class="anchor" id="gaf492843360fb4ecee6b5ec4166b04fcd"></a><!-- doxytag: member="channel_layout.h::av_channel_layout_extract_channel" ref="gaf492843360fb4ecee6b5ec4166b04fcd" args="(uint64_t channel_layout, int index)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">uint64_t <a class="el" href="group__channel__mask__c.html#gaf492843360fb4ecee6b5ec4166b04fcd">av_channel_layout_extract_channel</a> </td>
<td>(</td>
<td class="paramtype">uint64_t </td>
<td class="paramname"><em>channel_layout</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>index</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Get the channel with the given index in channel_layout. </p>
</div>
</div>
<a class="anchor" id="gaf9a5e23a9bbf5909f2dc84b25d78e35e"></a><!-- doxytag: member="channel_layout.h::av_get_channel_name" ref="gaf9a5e23a9bbf5909f2dc84b25d78e35e" args="(uint64_t channel)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">const char* <a class="el" href="group__channel__mask__c.html#gaf9a5e23a9bbf5909f2dc84b25d78e35e">av_get_channel_name</a> </td>
<td>(</td>
<td class="paramtype">uint64_t </td>
<td class="paramname"><em>channel</em></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Get the name of a given channel. </p>
<dl class="return"><dt><b>Returns:</b></dt><dd>channel name on success, NULL on error. </dd></dl>
</div>
</div>
<a class="anchor" id="gade4b74b99e3fb954b88b0cb8eddb785a"></a><!-- doxytag: member="channel_layout.h::av_get_channel_description" ref="gade4b74b99e3fb954b88b0cb8eddb785a" args="(uint64_t channel)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">const char* <a class="el" href="group__channel__mask__c.html#gade4b74b99e3fb954b88b0cb8eddb785a">av_get_channel_description</a> </td>
<td>(</td>
<td class="paramtype">uint64_t </td>
<td class="paramname"><em>channel</em></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Get the description of a given channel. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">channel</td><td>a channel layout with a single channel </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>channel description on success, NULL on error </dd></dl>
</div>
</div>
<a class="anchor" id="ga00447bfae43d690f1f549a9e2521bf85"></a><!-- doxytag: member="channel_layout.h::av_get_standard_channel_layout" ref="ga00447bfae43d690f1f549a9e2521bf85" args="(unsigned index, uint64_t *layout, const char **name)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int <a class="el" href="group__channel__mask__c.html#ga00447bfae43d690f1f549a9e2521bf85">av_get_standard_channel_layout</a> </td>
<td>(</td>
<td class="paramtype">unsigned </td>
<td class="paramname"><em>index</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint64_t * </td>
<td class="paramname"><em>layout</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char ** </td>
<td class="paramname"><em>name</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Get the value and name of a standard channel layout. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">index</td><td>index in an internal list, starting at 0 </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">layout</td><td>channel layout mask </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">name</td><td>name of the layout </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 if the layout exists, <0 if index is beyond the limits </dd></dl>
</div>
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