1# Codec<a name="ZH-CN_TOPIC_0000001131751215"></a> 2 3- [简介](#section11660541593) 4- [目录](#section161941989596) 5 - [接口说明](#section1551164914237) 6 - [使用说明](#section129654513264) 7 8- [相关仓](#section1371113476307) 9 10## 简介<a name="section11660541593"></a> 11 12该仓下主要包含Codec模块HDI（Hardware Driver Interface）接口定义及其实现，对上层提供媒体编解码的驱动能力接口，HDI接口主要提供如下功能： 13 14- 创建、销毁编解码器对象； 15- 启停编解码器 16- 原始码流编码为压缩码流； 17- 压缩码流恢复为原始码流 18- 清除编解码缓存。 19 20## 目录<a name="section161941989596"></a> 21 22该仓下源代码目录结构如下所示 23 24``` 25/drivers/peripheral/codec 26├── interfaces # codec模块对上层服务提供的驱动能力接口 27│ └── include # codec模块对外提供的接口定义 28``` 29 30### 接口说明<a name="section1551164914237"></a> 31 32Codec驱动提供给framework层可直接调用的能力接口，主要功能有：创建、销毁编解码器对象，启停编解码器操作，编解码处理、清除缓存、事件上报等 33 34提供的部分接口说明如[表1 Codec HDI接口列表](#table1513255710559)所示： 35 36**表 1** Codec HDI接口列表 37 38<a name="table1513255710559"></a> 39<table><thead align="left"><tr id="row171321857155517"><th class="cellrowborder" align="center" valign="top" width="12.821282128212822%" id="mcps1.2.4.1.1"><p id="p6132957115511"><a name="p6132957115511"></a><a name="p6132957115511"></a>头文件</p> 40</th> 41<th class="cellrowborder" align="center" valign="top" width="63.61636163616362%" id="mcps1.2.4.1.2"><p id="p14132125715552"><a name="p14132125715552"></a><a name="p14132125715552"></a>接口名称</p> 42</th> 43<th class="cellrowborder" align="center" valign="top" width="23.562356235623565%" id="mcps1.2.4.1.3"><p id="p18132205755516"><a name="p18132205755516"></a><a name="p18132205755516"></a>功能描述</p> 44</th> 45</tr> 46</thead> 47<tbody><tr id="row1267017500274"><td class="cellrowborder" rowspan="17" align="left" valign="top" width="12.821282128212822%" headers="mcps1.2.4.1.1 "><p id="p15674038913"><a name="p15674038913"></a><a name="p15674038913"></a></p> 48<p id="p169466917181"><a name="p169466917181"></a><a name="p169466917181"></a></p> 49<p id="p12106161012185"><a name="p12106161012185"></a><a name="p12106161012185"></a></p> 50<p id="p7255161017181"><a name="p7255161017181"></a><a name="p7255161017181"></a></p> 51<p id="p1839901041815"><a name="p1839901041815"></a><a name="p1839901041815"></a></p> 52<p id="p4540171015188"><a name="p4540171015188"></a><a name="p4540171015188"></a></p> 53<p id="p368816102189"><a name="p368816102189"></a><a name="p368816102189"></a></p> 54<p id="p679481051814"><a name="p679481051814"></a><a name="p679481051814"></a></p> 55<p id="p7399191241817"><a name="p7399191241817"></a><a name="p7399191241817"></a></p> 56<p id="p11902121271818"><a name="p11902121271818"></a><a name="p11902121271818"></a></p> 57<p id="p1296415129182"><a name="p1296415129182"></a><a name="p1296415129182"></a></p> 58<p id="p1742101311180"><a name="p1742101311180"></a><a name="p1742101311180"></a></p> 59<p id="p171041613101815"><a name="p171041613101815"></a><a name="p171041613101815"></a></p> 60<p id="p10172141314183"><a name="p10172141314183"></a><a name="p10172141314183"></a></p> 61<p id="p723216132180"><a name="p723216132180"></a><a name="p723216132180"></a></p> 62<p id="p825185015460"><a name="p825185015460"></a><a name="p825185015460"></a>codec_interface.h</p> 63<p id="p2133757135510"><a name="p2133757135510"></a><a name="p2133757135510"></a></p> 64<p id="p14171441118"><a name="p14171441118"></a><a name="p14171441118"></a></p> 65<p id="p57063567463"><a name="p57063567463"></a><a name="p57063567463"></a></p> 66<p id="p1285144710118"><a name="p1285144710118"></a><a name="p1285144710118"></a></p> 67<p id="p854114711117"><a name="p854114711117"></a><a name="p854114711117"></a></p> 68<p id="p15741647517"><a name="p15741647517"></a><a name="p15741647517"></a></p> 69<p id="p7909447418"><a name="p7909447418"></a><a name="p7909447418"></a></p> 70<p id="p12525910165811"><a name="p12525910165811"></a><a name="p12525910165811"></a></p> 71<p id="p942322013262"><a name="p942322013262"></a><a name="p942322013262"></a></p> 72<p id="p1040515339526"><a name="p1040515339526"></a><a name="p1040515339526"></a></p> 73<p id="p19405533115216"><a name="p19405533115216"></a><a name="p19405533115216"></a></p> 74</td> 75<td class="cellrowborder" valign="top" width="63.61636163616362%" headers="mcps1.2.4.1.2 "><p id="p174121125175619"><a name="p174121125175619"></a><a name="p174121125175619"></a>int32_t CodecInit();</p> 76</td> 77<td class="cellrowborder" valign="top" width="23.562356235623565%" headers="mcps1.2.4.1.3 "><p id="p114126258569"><a name="p114126258569"></a><a name="p114126258569"></a>codec模块初始化处理</p> 78</td> 79</tr> 80<tr id="row2661171172814"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p1341212595610"><a name="p1341212595610"></a><a name="p1341212595610"></a>int32_t CodecDeinit();</p> 81</td> 82<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p1341272515610"><a name="p1341272515610"></a><a name="p1341272515610"></a>codec模块去初始化处理</p> 83</td> 84</tr> 85<tr id="row4385112822818"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p14413122555620"><a name="p14413122555620"></a><a name="p14413122555620"></a>int32_t CodecEnumerateCapbility(uint32_t index, CodecCapbility *cap);</p> 86</td> 87<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p1141372575614"><a name="p1141372575614"></a><a name="p1141372575614"></a>获取某一个编解码能力</p> 88</td> 89</tr> 90<tr id="row181371630162816"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p1941362515561"><a name="p1941362515561"></a><a name="p1941362515561"></a>int32_t CodecGetCapbility(AvCodecMime mime, CodecType type, uint32_t flags, CodecCapbility *cap);</p> 91</td> 92<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p44131025115619"><a name="p44131025115619"></a><a name="p44131025115619"></a>获取指定编解码能力</p> 93</td> 94</tr> 95<tr id="row01531026142811"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p241312251562"><a name="p241312251562"></a><a name="p241312251562"></a>int32_t CodecCreate(const char* name, const Param *attr, int len, CODEC_HANDLETYPE *handle);</p> 96</td> 97<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p12413525135615"><a name="p12413525135615"></a><a name="p12413525135615"></a>创建编解码对象</p> 98</td> 99</tr> 100<tr id="row11460182372815"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p44133252564"><a name="p44133252564"></a><a name="p44133252564"></a>int32_t CodecDestroy(CODEC_HANDLETYPE handle);</p> 101</td> 102<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p041392535610"><a name="p041392535610"></a><a name="p041392535610"></a>销毁编解码对象</p> 103</td> 104</tr> 105<tr id="row61462216285"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p84134251566"><a name="p84134251566"></a><a name="p84134251566"></a>int32_t CodecSetPortMode(CODEC_HANDLETYPE handle, DirectionType type, BufferMode mode);</p> 106</td> 107<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p204131258569"><a name="p204131258569"></a><a name="p204131258569"></a>设置端口buffer模式：内部buffer或外部buffer</p> 108</td> 109</tr> 110<tr id="row791355812713"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p10413112575617"><a name="p10413112575617"></a><a name="p10413112575617"></a>int32_t CodecSetParameter(CODEC_HANDLETYPE handle, const Param *params, int paramCnt);</p> 111</td> 112<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p94138253562"><a name="p94138253562"></a><a name="p94138253562"></a>扩展接口。设置编解码属性</p> 113</td> 114</tr> 115<tr id="row3731175622711"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p441318251564"><a name="p441318251564"></a><a name="p441318251564"></a>int32_t CodecGetParameter(CODEC_HANDLETYPE handle, Param *params, int paramCnt);</p> 116</td> 117<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p74132257566"><a name="p74132257566"></a><a name="p74132257566"></a>扩展接口。获取编解码属性</p> 118</td> 119</tr> 120<tr id="row131131754172718"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p14132257567"><a name="p14132257567"></a><a name="p14132257567"></a>int32_t CodecStart(CODEC_HANDLETYPE handle);</p> 121</td> 122<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p1741382510566"><a name="p1741382510566"></a><a name="p1741382510566"></a>启动工作。</p> 123</td> 124</tr> 125<tr id="row133541652202712"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p11413125185617"><a name="p11413125185617"></a><a name="p11413125185617"></a>int32_t CodecStop(CODEC_HANDLETYPE handle);</p> 126</td> 127<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p154137256566"><a name="p154137256566"></a><a name="p154137256566"></a>停止工作</p> 128</td> 129</tr> 130<tr id="row148624820271"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p124141425125610"><a name="p124141425125610"></a><a name="p124141425125610"></a>int32_t CodecFlush(CODEC_HANDLETYPE handle, DirectionType directType);</p> 131</td> 132<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p64141258565"><a name="p64141258565"></a><a name="p64141258565"></a>清除缓存处理</p> 133</td> 134</tr> 135<tr id="row1676314450275"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p144141225165615"><a name="p144141225165615"></a><a name="p144141225165615"></a>int32_t CodecQueueInput(CODEC_HANDLETYPE handle, const InputInfo *inputData, uint32_t timeoutMs);</p> 136</td> 137<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p6414182535616"><a name="p6414182535616"></a><a name="p6414182535616"></a>送入输入buffer</p> 138</td> 139</tr> 140<tr id="row194281341102710"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p15414112510561"><a name="p15414112510561"></a><a name="p15414112510561"></a>int32_t CodecDequeInput(CODEC_HANDLETYPE handle, uint32_t timeoutMs, InputInfo *inputData);</p> 141</td> 142<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p341492555613"><a name="p341492555613"></a><a name="p341492555613"></a>取出输入buffer</p> 143</td> 144</tr> 145<tr id="row560213915277"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p8414525145610"><a name="p8414525145610"></a><a name="p8414525145610"></a>int32_t CodecQueueOutput(CODEC_HANDLETYPE handle, OutputInfo *outInfo, uint32_t timeoutMs, int releaseFenceFd);</p> 146</td> 147<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p1241442513569"><a name="p1241442513569"></a><a name="p1241442513569"></a>送入输出buffer</p> 148</td> 149</tr> 150<tr id="row933244161410"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p6414425185619"><a name="p6414425185619"></a><a name="p6414425185619"></a>int32_t CodecDequeueOutput(CODEC_HANDLETYPE handle, uint32_t timeoutMs, int *acquireFd, OutputInfo *outInfo);</p> 151</td> 152<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p16414112518560"><a name="p16414112518560"></a><a name="p16414112518560"></a>取出输出buffer</p> 153</td> 154</tr> 155<tr id="row182432045121416"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p104148252565"><a name="p104148252565"></a><a name="p104148252565"></a>int32_t CodecSetCallback(CODEC_HANDLETYPE handle, const CodecCallback *cb, UINTPTR instance);</p> 156</td> 157<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p20414172595617"><a name="p20414172595617"></a><a name="p20414172595617"></a>设置回调函数</p> 158</td> 159</tr> 160</tbody> 161</table> 162 163### 使用说明<a name="section129654513264"></a> 164 165该仓核心功能包括两个方面： 166 167- 提供Codec HDI接口供framework层调用，实现编码和解码基本功能。 168- 作为标准南向接口，保证南向OEM产商实现HDI-adapter的规范性，保证生态良性演进。 169 170具体接口调用及实现，以接口注释为准。 171 172## 相关仓<a name="section1371113476307"></a> 173 174[驱动子系统](https://gitee.com/openharmony/docs/blob/master/zh-cn/readme/%E9%A9%B1%E5%8A%A8%E5%AD%90%E7%B3%BB%E7%BB%9F.md) 175 176[drivers\_framework](https://gitee.com/openharmony/drivers_framework/blob/master/README_zh.md) 177 178[drivers\_adapter](https://gitee.com/openharmony/drivers_adapter/blob/master/README_zh.md) 179 180[drivers\_adapter\_khdf\_linux](https://gitee.com/openharmony/drivers_adapter_khdf_linux/blob/master/README_zh.md) 181 182drivers\_peripheral 183 184