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 <span id="projectnumber">2.7.1</span>
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<div class="title">vaapi_context Struct Reference<div class="ingroups"><a class="el" href="group__lavc__codec__hwaccel__vaapi.html">VA API Decoding</a></div></div> </div>
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<!-- doxytag: class="vaapi_context" -->
<p>This structure is used to share data between the FFmpeg library and the client video application.
<a href="structvaapi__context.html#details">More...</a></p>
<p><code>#include <<a class="el" href="vaapi_8h_source.html">vaapi.h</a>></code></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-attribs"></a>
Data Fields</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="structvaapi__context.html#ad16240a71f568ffdb98dc7cc7d231180">display</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Window system dependent data. <a href="#ad16240a71f568ffdb98dc7cc7d231180"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structvaapi__context.html#a8523abca4746125bb1458a13bee1a1bd">config_id</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Configuration ID. <a href="#a8523abca4746125bb1458a13bee1a1bd"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structvaapi__context.html#a2574735bdd4c51910ce627a6f1ec0b63">context_id</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Context ID (video decode pipeline) <a href="#a2574735bdd4c51910ce627a6f1ec0b63"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structvaapi__context.html#ad674d4caefd1f4a1de37e5c05e595194">pic_param_buf_id</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">VAPictureParameterBuffer ID. <a href="#ad674d4caefd1f4a1de37e5c05e595194"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structvaapi__context.html#a0182841a5d2ad71f35257f97eb9a2ebc">iq_matrix_buf_id</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">VAIQMatrixBuffer ID. <a href="#a0182841a5d2ad71f35257f97eb9a2ebc"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structvaapi__context.html#a94c78d1c8fffa43a4d816b1a5182e31c">bitplane_buf_id</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">VABitPlaneBuffer ID (for VC-1 decoding) <a href="#a94c78d1c8fffa43a4d816b1a5182e31c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">uint32_t * </td><td class="memItemRight" valign="bottom"><a class="el" href="structvaapi__context.html#adc452028b6218a76c8ec270f8311b15f">slice_buf_ids</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Slice parameter/data buffer IDs. <a href="#adc452028b6218a76c8ec270f8311b15f"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="structvaapi__context.html#aee70c2c0dab6a499d2692e46fc0c0cca">n_slice_buf_ids</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Number of effective slice buffer IDs to send to the HW. <a href="#aee70c2c0dab6a499d2692e46fc0c0cca"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="structvaapi__context.html#a4eb08e120d10e1ca3f0692cf9eba826a">slice_buf_ids_alloc</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Size of pre-allocated slice_buf_ids. <a href="#a4eb08e120d10e1ca3f0692cf9eba826a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="structvaapi__context.html#a0d9697f059f448fa6863787ce8f03bd5">slice_params</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Pointer to VASliceParameterBuffers. <a href="#a0d9697f059f448fa6863787ce8f03bd5"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="structvaapi__context.html#a0bad2e1063982d9c1c28964fb0cf402b">slice_param_size</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Size of a VASliceParameterBuffer element. <a href="#a0bad2e1063982d9c1c28964fb0cf402b"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="structvaapi__context.html#aeafe25a810ba11d4b81f12cd940d6313">slice_params_alloc</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Size of pre-allocated slice_params. <a href="#aeafe25a810ba11d4b81f12cd940d6313"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="structvaapi__context.html#ab4dc6ff8af4a58cf53520f7b6435e6dd">slice_count</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Number of slices currently filled in. <a href="#ab4dc6ff8af4a58cf53520f7b6435e6dd"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const uint8_t * </td><td class="memItemRight" valign="bottom"><a class="el" href="structvaapi__context.html#ac013038c1faa1cbaf0aa132ada52414c">slice_data</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Pointer to slice data buffer base. <a href="#ac013038c1faa1cbaf0aa132ada52414c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structvaapi__context.html#ab2444cafb4a40251c026c73d049fe84a">slice_data_size</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Current size of slice data. <a href="#ab2444cafb4a40251c026c73d049fe84a"></a><br/></td></tr>
</table>
<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>This structure is used to share data between the FFmpeg library and the client video application. </p>
<p>This shall be zero-allocated and available as <a class="el" href="structAVCodecContext.html#ab222f7d747dfdceff0a76999e09648c0" title="Hardware accelerator context.">AVCodecContext.hwaccel_context</a>. All user members can be set once during initialization or through each <a class="el" href="structAVCodecContext.html#ad2a02f9d24723a62e30a3cfecdb7c2c5" title="Called at the beginning of each frame to get a buffer for it.">AVCodecContext.get_buffer()</a> function call. In any case, they must be valid prior to calling decoding functions. </p>
<p>Definition at line <a class="el" href="vaapi_8h_source.html#l00050">50</a> of file <a class="el" href="vaapi_8h_source.html">vaapi.h</a>.</p>
</div><hr/><h2>Field Documentation</h2>
<a class="anchor" id="ad16240a71f568ffdb98dc7cc7d231180"></a><!-- doxytag: member="vaapi_context::display" ref="ad16240a71f568ffdb98dc7cc7d231180" args="" -->
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<td class="memname">void* <a class="el" href="structvaapi__context.html#ad16240a71f568ffdb98dc7cc7d231180">vaapi_context::display</a></td>
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<p>Window system dependent data. </p>
<ul>
<li>encoding: unused</li>
<li>decoding: Set by user </li>
</ul>
<p>Definition at line <a class="el" href="vaapi_8h_source.html#l00057">57</a> of file <a class="el" href="vaapi_8h_source.html">vaapi.h</a>.</p>
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<td class="memname">uint32_t <a class="el" href="structvaapi__context.html#a8523abca4746125bb1458a13bee1a1bd">vaapi_context::config_id</a></td>
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<div class="memdoc">
<p>Configuration ID. </p>
<ul>
<li>encoding: unused</li>
<li>decoding: Set by user </li>
</ul>
<p>Definition at line <a class="el" href="vaapi_8h_source.html#l00065">65</a> of file <a class="el" href="vaapi_8h_source.html">vaapi.h</a>.</p>
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<td class="memname">uint32_t <a class="el" href="structvaapi__context.html#a2574735bdd4c51910ce627a6f1ec0b63">vaapi_context::context_id</a></td>
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<div class="memdoc">
<p>Context ID (video decode pipeline) </p>
<ul>
<li>encoding: unused</li>
<li>decoding: Set by user </li>
</ul>
<p>Definition at line <a class="el" href="vaapi_8h_source.html#l00073">73</a> of file <a class="el" href="vaapi_8h_source.html">vaapi.h</a>.</p>
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<td class="memname">uint32_t <a class="el" href="structvaapi__context.html#ad674d4caefd1f4a1de37e5c05e595194">vaapi_context::pic_param_buf_id</a></td>
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<div class="memdoc">
<p>VAPictureParameterBuffer ID. </p>
<ul>
<li>encoding: unused</li>
<li>decoding: Set by libavcodec </li>
</ul>
<p>Definition at line <a class="el" href="vaapi_8h_source.html#l00081">81</a> of file <a class="el" href="vaapi_8h_source.html">vaapi.h</a>.</p>
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<td class="memname">uint32_t <a class="el" href="structvaapi__context.html#a0182841a5d2ad71f35257f97eb9a2ebc">vaapi_context::iq_matrix_buf_id</a></td>
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<p>VAIQMatrixBuffer ID. </p>
<ul>
<li>encoding: unused</li>
<li>decoding: Set by libavcodec </li>
</ul>
<p>Definition at line <a class="el" href="vaapi_8h_source.html#l00089">89</a> of file <a class="el" href="vaapi_8h_source.html">vaapi.h</a>.</p>
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<td class="memname">uint32_t <a class="el" href="structvaapi__context.html#a94c78d1c8fffa43a4d816b1a5182e31c">vaapi_context::bitplane_buf_id</a></td>
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<p>VABitPlaneBuffer ID (for VC-1 decoding) </p>
<ul>
<li>encoding: unused</li>
<li>decoding: Set by libavcodec </li>
</ul>
<p>Definition at line <a class="el" href="vaapi_8h_source.html#l00097">97</a> of file <a class="el" href="vaapi_8h_source.html">vaapi.h</a>.</p>
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<p>Slice parameter/data buffer IDs. </p>
<ul>
<li>encoding: unused</li>
<li>decoding: Set by libavcodec </li>
</ul>
<p>Definition at line <a class="el" href="vaapi_8h_source.html#l00105">105</a> of file <a class="el" href="vaapi_8h_source.html">vaapi.h</a>.</p>
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<p>Number of effective slice buffer IDs to send to the HW. </p>
<ul>
<li>encoding: unused</li>
<li>decoding: Set by libavcodec </li>
</ul>
<p>Definition at line <a class="el" href="vaapi_8h_source.html#l00113">113</a> of file <a class="el" href="vaapi_8h_source.html">vaapi.h</a>.</p>
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<p>Size of pre-allocated slice_buf_ids. </p>
<ul>
<li>encoding: unused</li>
<li>decoding: Set by libavcodec </li>
</ul>
<p>Definition at line <a class="el" href="vaapi_8h_source.html#l00121">121</a> of file <a class="el" href="vaapi_8h_source.html">vaapi.h</a>.</p>
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<td class="memname">void* <a class="el" href="structvaapi__context.html#a0d9697f059f448fa6863787ce8f03bd5">vaapi_context::slice_params</a></td>
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<p>Pointer to VASliceParameterBuffers. </p>
<ul>
<li>encoding: unused</li>
<li>decoding: Set by libavcodec </li>
</ul>
<p>Definition at line <a class="el" href="vaapi_8h_source.html#l00129">129</a> of file <a class="el" href="vaapi_8h_source.html">vaapi.h</a>.</p>
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<p>Size of a VASliceParameterBuffer element. </p>
<ul>
<li>encoding: unused</li>
<li>decoding: Set by libavcodec </li>
</ul>
<p>Definition at line <a class="el" href="vaapi_8h_source.html#l00137">137</a> of file <a class="el" href="vaapi_8h_source.html">vaapi.h</a>.</p>
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<p>Size of pre-allocated slice_params. </p>
<ul>
<li>encoding: unused</li>
<li>decoding: Set by libavcodec </li>
</ul>
<p>Definition at line <a class="el" href="vaapi_8h_source.html#l00145">145</a> of file <a class="el" href="vaapi_8h_source.html">vaapi.h</a>.</p>
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<p>Number of slices currently filled in. </p>
<ul>
<li>encoding: unused</li>
<li>decoding: Set by libavcodec </li>
</ul>
<p>Definition at line <a class="el" href="vaapi_8h_source.html#l00153">153</a> of file <a class="el" href="vaapi_8h_source.html">vaapi.h</a>.</p>
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<a class="anchor" id="ac013038c1faa1cbaf0aa132ada52414c"></a><!-- doxytag: member="vaapi_context::slice_data" ref="ac013038c1faa1cbaf0aa132ada52414c" args="" -->
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<td class="memname">const uint8_t* <a class="el" href="structvaapi__context.html#ac013038c1faa1cbaf0aa132ada52414c">vaapi_context::slice_data</a></td>
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<p>Pointer to slice data buffer base. </p>
<ul>
<li>encoding: unused</li>
<li>decoding: Set by libavcodec </li>
</ul>
<p>Definition at line <a class="el" href="vaapi_8h_source.html#l00160">160</a> of file <a class="el" href="vaapi_8h_source.html">vaapi.h</a>.</p>
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<a class="anchor" id="ab2444cafb4a40251c026c73d049fe84a"></a><!-- doxytag: member="vaapi_context::slice_data_size" ref="ab2444cafb4a40251c026c73d049fe84a" args="" -->
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<td class="memname">uint32_t <a class="el" href="structvaapi__context.html#ab2444cafb4a40251c026c73d049fe84a">vaapi_context::slice_data_size</a></td>
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<p>Current size of slice data. </p>
<ul>
<li>encoding: unused</li>
<li>decoding: Set by libavcodec </li>
</ul>
<p>Definition at line <a class="el" href="vaapi_8h_source.html#l00168">168</a> of file <a class="el" href="vaapi_8h_source.html">vaapi.h</a>.</p>
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<hr/>The documentation for this struct was generated from the following file:<ul>
<li>libavcodec/<a class="el" href="vaapi_8h_source.html">vaapi.h</a></li>
</ul>
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