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<div id="projectname">FFmpeg
 <span id="projectnumber">2.7.1</span>
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<a href="#nested-classes">Data Structures</a> |
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<a href="#func-members">Functions</a> </div>
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<div class="title">VDA</div> </div>
<div class="ingroups"><a class="el" href="group__lavc__codec__hwaccel.html">Hardware Accelerators bridge</a></div></div><!--header-->
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Data Structures</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structvda__context.html">vda_context</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">This structure is used to provide the necessary configurations and data to the VDA FFmpeg HWAccel implementation. <a href="structvda__context.html#details">More...</a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structAVVDAContext.html">AVVDAContext</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">This struct holds all the information that needs to be passed between the caller and libavcodec for initializing VDA decoding. <a href="structAVVDAContext.html#details">More...</a><br/></td></tr>
<tr><td colspan="2"><h2><a name="files"></a>
Files</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">file  </td><td class="memItemRight" valign="bottom"><a class="el" href="vda_8h.html">vda.h</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight"><p>Public libavcodec VDA header. </p>
<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">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__codec__hwaccel__vda.html#gac1efc3b9787748648228c97845fc4c52">ff_vda_create_decoder</a> (struct <a class="el" href="structvda__context.html">vda_context</a> *vda_ctx, uint8_t *extradata, int extradata_size)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Create the video decoder. <a href="#gac1efc3b9787748648228c97845fc4c52"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__codec__hwaccel__vda.html#ga032d202aa5c1eea108b6305670bc3322">ff_vda_destroy_decoder</a> (struct <a class="el" href="structvda__context.html">vda_context</a> *vda_ctx)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Destroy the video decoder. <a href="#ga032d202aa5c1eea108b6305670bc3322"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="structAVVDAContext.html">AVVDAContext</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__codec__hwaccel__vda.html#ga406d1f99d8c74fbeb2bb6992817d02b3">av_vda_alloc_context</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Allocate and initialize a VDA context. <a href="#ga406d1f99d8c74fbeb2bb6992817d02b3"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__codec__hwaccel__vda.html#ga50f5cd66fd40a76ffb1d419475c04cd4">av_vda_default_init</a> (<a class="el" href="structAVCodecContext.html">AVCodecContext</a> *avctx)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">This is a convenience function that creates and sets up the VDA context using an internal implementation. <a href="#ga50f5cd66fd40a76ffb1d419475c04cd4"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__codec__hwaccel__vda.html#ga6df74ab297f8ed873d7d06f75736fb6e">av_vda_default_init2</a> (<a class="el" href="structAVCodecContext.html">AVCodecContext</a> *avctx, <a class="el" href="structAVVDAContext.html">AVVDAContext</a> *vdactx)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">This is a convenience function that creates and sets up the VDA context using an internal implementation. <a href="#ga6df74ab297f8ed873d7d06f75736fb6e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__codec__hwaccel__vda.html#ga322e94626395443ebb900e4034ec5096">av_vda_default_free</a> (<a class="el" href="structAVCodecContext.html">AVCodecContext</a> *avctx)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">This function must be called to free the VDA context initialized with <a class="el" href="group__lavc__codec__hwaccel__vda.html#ga50f5cd66fd40a76ffb1d419475c04cd4" title="This is a convenience function that creates and sets up the VDA context using an internal implementat...">av_vda_default_init()</a>. <a href="#ga322e94626395443ebb900e4034ec5096"></a><br/></td></tr>
</table>
<hr/><h2>Function Documentation</h2>
<a class="anchor" id="gac1efc3b9787748648228c97845fc4c52"></a><!-- doxytag: member="vda.h::ff_vda_create_decoder" ref="gac1efc3b9787748648228c97845fc4c52" args="(struct vda_context *vda_ctx, uint8_t *extradata, int extradata_size)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int <a class="el" href="group__lavc__codec__hwaccel__vda.html#gac1efc3b9787748648228c97845fc4c52">ff_vda_create_decoder</a> </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structvda__context.html">vda_context</a> * </td>
<td class="paramname"><em>vda_ctx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint8_t * </td>
<td class="paramname"><em>extradata</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>extradata_size</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Create the video decoder. </p>
</div>
</div>
<a class="anchor" id="ga032d202aa5c1eea108b6305670bc3322"></a><!-- doxytag: member="vda.h::ff_vda_destroy_decoder" ref="ga032d202aa5c1eea108b6305670bc3322" args="(struct vda_context *vda_ctx)" -->
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<div class="memproto">
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<td class="memname">int <a class="el" href="group__lavc__codec__hwaccel__vda.html#ga032d202aa5c1eea108b6305670bc3322">ff_vda_destroy_decoder</a> </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structvda__context.html">vda_context</a> * </td>
<td class="paramname"><em>vda_ctx</em></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Destroy the video decoder. </p>
</div>
</div>
<a class="anchor" id="ga406d1f99d8c74fbeb2bb6992817d02b3"></a><!-- doxytag: member="vda.h::av_vda_alloc_context" ref="ga406d1f99d8c74fbeb2bb6992817d02b3" args="(void)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
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<td class="memname"><a class="el" href="structAVVDAContext.html">AVVDAContext</a>* <a class="el" href="group__lavc__codec__hwaccel__vda.html#ga406d1f99d8c74fbeb2bb6992817d02b3">av_vda_alloc_context</a> </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Allocate and initialize a VDA context. </p>
<p>This function should be called from the get_format() callback when the caller selects the AV_PIX_FMT_VDA format. The caller must then create the decoder object (using the output callback provided by libavcodec) that will be used for VDA-accelerated decoding.</p>
<p>When decoding with VDA is finished, the caller must destroy the decoder object and free the VDA context using <a class="el" href="group__lavu__mem.html#ga0c9096f498624c525aa2315b8a20c411" title="Free a memory block which has been allocated with av_malloc(z)() or av_realloc().">av_free()</a>.</p>
<dl class="return"><dt><b>Returns:</b></dt><dd>the newly allocated context or NULL on failure </dd></dl>
</div>
</div>
<a class="anchor" id="ga50f5cd66fd40a76ffb1d419475c04cd4"></a><!-- doxytag: member="vda.h::av_vda_default_init" ref="ga50f5cd66fd40a76ffb1d419475c04cd4" args="(AVCodecContext *avctx)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
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<td class="memname">int <a class="el" href="group__lavc__codec__hwaccel__vda.html#ga50f5cd66fd40a76ffb1d419475c04cd4">av_vda_default_init</a> </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structAVCodecContext.html">AVCodecContext</a> * </td>
<td class="paramname"><em>avctx</em></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>This is a convenience function that creates and sets up the VDA context using an internal implementation. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">avctx</td><td>the corresponding codec context</td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>>= 0 on success, a negative AVERROR code on failure </dd></dl>
</div>
</div>
<a class="anchor" id="ga6df74ab297f8ed873d7d06f75736fb6e"></a><!-- doxytag: member="vda.h::av_vda_default_init2" ref="ga6df74ab297f8ed873d7d06f75736fb6e" args="(AVCodecContext *avctx, AVVDAContext *vdactx)" -->
<div class="memitem">
<div class="memproto">
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<td class="memname">int <a class="el" href="group__lavc__codec__hwaccel__vda.html#ga6df74ab297f8ed873d7d06f75736fb6e">av_vda_default_init2</a> </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structAVCodecContext.html">AVCodecContext</a> * </td>
<td class="paramname"><em>avctx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structAVVDAContext.html">AVVDAContext</a> * </td>
<td class="paramname"><em>vdactx</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>This is a convenience function that creates and sets up the VDA context using an internal implementation. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">avctx</td><td>the corresponding codec context </td></tr>
<tr><td class="paramname">vdactx</td><td>the VDA context to use</td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>>= 0 on success, a negative AVERROR code on failure </dd></dl>
</div>
</div>
<a class="anchor" id="ga322e94626395443ebb900e4034ec5096"></a><!-- doxytag: member="vda.h::av_vda_default_free" ref="ga322e94626395443ebb900e4034ec5096" args="(AVCodecContext *avctx)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void <a class="el" href="group__lavc__codec__hwaccel__vda.html#ga322e94626395443ebb900e4034ec5096">av_vda_default_free</a> </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structAVCodecContext.html">AVCodecContext</a> * </td>
<td class="paramname"><em>avctx</em></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>This function must be called to free the VDA context initialized with <a class="el" href="group__lavc__codec__hwaccel__vda.html#ga50f5cd66fd40a76ffb1d419475c04cd4" title="This is a convenience function that creates and sets up the VDA context using an internal implementat...">av_vda_default_init()</a>. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">avctx</td><td>the corresponding codec context </td></tr>
</table>
</dd>
</dl>
</div>
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