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 <span id="projectnumber">2.7.1</span>
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<div class="headertitle">
<div class="title">VDPAU Decoder and Renderer</div> </div>
<div class="ingroups"><a class="el" href="group__lavc__codec__hwaccel.html">Hardware Accelerators bridge</a></div></div><!--header-->
<div class="contents">
<p>VDPAU hardware acceleration has two modules.
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="nested-classes"></a>
Data Structures</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">union  </td><td class="memItemRight" valign="bottom"><a class="el" href="unionAVVDPAUPictureInfo.html">AVVDPAUPictureInfo</a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structAVVDPAUContext.html">AVVDPAUContext</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">This structure is used to share data between the libavcodec library and the client video application. <a href="structAVVDPAUContext.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="structvdpau__render__state.html">vdpau_render_state</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">This structure is used as a callback between the FFmpeg decoder (vd_) and presentation (vo_) module. <a href="structvdpau__render__state.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="vdpau_8h.html">vdpau.h</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight"><p>Public libavcodec VDPAU header. </p>
<br/></td></tr>
<tr><td colspan="2"><h2><a name="define-members"></a>
Defines</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__codec__hwaccel__vdpau.html#ga87551b42b8cc836804d9e0c5ac6fa367">FF_VDPAU_STATE_USED_FOR_RENDER</a>   1</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">The videoSurface is used for rendering. <a href="#ga87551b42b8cc836804d9e0c5ac6fa367"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__codec__hwaccel__vdpau.html#ga1f3b6a25961a335e3bb131428266d4a9">FF_VDPAU_STATE_USED_FOR_REFERENCE</a>   2</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">The videoSurface is needed for reference/prediction. <a href="#ga1f3b6a25961a335e3bb131428266d4a9"></a><br/></td></tr>
<tr><td colspan="2"><h2><a name="typedef-members"></a>
Typedefs</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">typedef int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__codec__hwaccel__vdpau.html#ga98e0853e07041294b96e1f4611ad9858">AVVDPAU_Render2</a> )(struct <a class="el" href="structAVCodecContext.html">AVCodecContext</a> *, struct <a class="el" href="structAVFrame.html">AVFrame</a> *, const VdpPictureInfo *, uint32_t, const VdpBitstreamBuffer *)</td></tr>
<tr><td colspan="2"><h2><a name="func-members"></a>
Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="structAVVDPAUContext.html">AVVDPAUContext</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__codec__hwaccel__vdpau.html#gabd46596564db27b9783814b2942f6d84">av_alloc_vdpaucontext</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">allocation function for <a class="el" href="structAVVDPAUContext.html" title="This structure is used to share data between the libavcodec library and the client video application...">AVVDPAUContext</a> <a href="#gabd46596564db27b9783814b2942f6d84"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__lavc__codec__hwaccel__vdpau.html#ga98e0853e07041294b96e1f4611ad9858">AVVDPAU_Render2</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__codec__hwaccel__vdpau.html#ga0a3496e46e9dfcd50f7baa96a9da0275">av_vdpau_hwaccel_get_render2</a> (const <a class="el" href="structAVVDPAUContext.html">AVVDPAUContext</a> *)</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__vdpau.html#ga5d993c664b580bb5b927e46c34455cf6">av_vdpau_hwaccel_set_render2</a> (<a class="el" href="structAVVDPAUContext.html">AVVDPAUContext</a> *, <a class="el" href="group__lavc__codec__hwaccel__vdpau.html#ga98e0853e07041294b96e1f4611ad9858">AVVDPAU_Render2</a>)</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__vdpau.html#gac56d6b1b4478056afc0e0a8f52271afa">av_vdpau_bind_context</a> (<a class="el" href="structAVCodecContext.html">AVCodecContext</a> *avctx, VdpDevice device, VdpGetProcAddress *get_proc_address, unsigned flags)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Associate a VDPAU device with a codec context for hardware acceleration. <a href="#gac56d6b1b4478056afc0e0a8f52271afa"></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__vdpau.html#gad4354a22f2f4d44000515e836b7863af">av_vdpau_get_surface_parameters</a> (<a class="el" href="structAVCodecContext.html">AVCodecContext</a> *avctx, VdpChromaType *type, uint32_t *<a class="el" href="demuxing__decoding_8c.html#a2474a5474cbff19523a51eb1de01cda4">width</a>, uint32_t *<a class="el" href="demuxing__decoding_8c.html#ad12fc34ce789bce6c8a05d8a17138534">height</a>)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Gets the parameters to create an adequate VDPAU video surface for the codec context using VDPAU hardware decoding acceleration. <a href="#gad4354a22f2f4d44000515e836b7863af"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="structAVVDPAUContext.html">AVVDPAUContext</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__codec__hwaccel__vdpau.html#gac3b2e926326d9bc7c4a856304c4bc0f8">av_vdpau_alloc_context</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Allocate an <a class="el" href="structAVVDPAUContext.html" title="This structure is used to share data between the libavcodec library and the client video application...">AVVDPAUContext</a>. <a href="#gac3b2e926326d9bc7c4a856304c4bc0f8"></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__vdpau.html#gaa5dd9ae3912059bdb13f88ddfda26657">av_vdpau_get_profile</a> (<a class="el" href="structAVCodecContext.html">AVCodecContext</a> *avctx, VdpDecoderProfile *profile)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get a decoder profile that should be used for initializing a VDPAU decoder. <a href="#gaa5dd9ae3912059bdb13f88ddfda26657"></a><br/></td></tr>
</table>
<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<p>VDPAU hardware acceleration has two modules. </p>
<ul>
<li>VDPAU decoding</li>
<li>VDPAU presentation</li>
</ul>
<p>The VDPAU decoding module parses all headers using FFmpeg parsing mechanisms and uses VDPAU for the actual decoding.</p>
<p>As per the current implementation, the actual decoding and rendering (API calls) are done as part of the VDPAU presentation (vo_vdpau.c) module. </p>
<hr/><h2>Define Documentation</h2>
<a class="anchor" id="ga87551b42b8cc836804d9e0c5ac6fa367"></a><!-- doxytag: member="vdpau.h::FF_VDPAU_STATE_USED_FOR_RENDER" ref="ga87551b42b8cc836804d9e0c5ac6fa367" args="" -->
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<td class="memname">#define <a class="el" href="group__lavc__codec__hwaccel__vdpau.html#ga87551b42b8cc836804d9e0c5ac6fa367">FF_VDPAU_STATE_USED_FOR_RENDER</a>   1</td>
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<div class="memdoc">
<p>The videoSurface is used for rendering. </p>
<p>Definition at line <a class="el" href="vdpau_8h_source.html#l00214">214</a> of file <a class="el" href="vdpau_8h_source.html">vdpau.h</a>.</p>
</div>
</div>
<a class="anchor" id="ga1f3b6a25961a335e3bb131428266d4a9"></a><!-- doxytag: member="vdpau.h::FF_VDPAU_STATE_USED_FOR_REFERENCE" ref="ga1f3b6a25961a335e3bb131428266d4a9" args="" -->
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<td class="memname">#define <a class="el" href="group__lavc__codec__hwaccel__vdpau.html#ga1f3b6a25961a335e3bb131428266d4a9">FF_VDPAU_STATE_USED_FOR_REFERENCE</a>   2</td>
</tr>
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<div class="memdoc">
<p>The videoSurface is needed for reference/prediction. </p>
<p>The codec manipulates this. </p>
<p>Definition at line <a class="el" href="vdpau_8h_source.html#l00220">220</a> of file <a class="el" href="vdpau_8h_source.html">vdpau.h</a>.</p>
</div>
</div>
<hr/><h2>Typedef Documentation</h2>
<a class="anchor" id="ga98e0853e07041294b96e1f4611ad9858"></a><!-- doxytag: member="vdpau.h::AVVDPAU_Render2" ref="ga98e0853e07041294b96e1f4611ad9858" args=")(struct AVCodecContext *, struct AVFrame *, const VdpPictureInfo *, uint32_t, const VdpBitstreamBuffer *)" -->
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<td class="memname">typedef int(* <a class="el" href="group__lavc__codec__hwaccel__vdpau.html#ga98e0853e07041294b96e1f4611ad9858">AVVDPAU_Render2</a>)(struct <a class="el" href="structAVCodecContext.html">AVCodecContext</a> *, struct <a class="el" href="structAVFrame.html">AVFrame</a> *, const VdpPictureInfo *, uint32_t, const VdpBitstreamBuffer *)</td>
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<div class="memdoc">
<p>Definition at line <a class="el" href="vdpau_8h_source.html#l00072">72</a> of file <a class="el" href="vdpau_8h_source.html">vdpau.h</a>.</p>
</div>
</div>
<hr/><h2>Function Documentation</h2>
<a class="anchor" id="gabd46596564db27b9783814b2942f6d84"></a><!-- doxytag: member="vdpau.h::av_alloc_vdpaucontext" ref="gabd46596564db27b9783814b2942f6d84" args="(void)" -->
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<td class="memname"><a class="el" href="structAVVDPAUContext.html">AVVDPAUContext</a>* <a class="el" href="group__lavc__codec__hwaccel__vdpau.html#gabd46596564db27b9783814b2942f6d84">av_alloc_vdpaucontext</a> </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td><td>)</td>
<td></td>
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</table>
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<div class="memdoc">
<p>allocation function for <a class="el" href="structAVVDPAUContext.html" title="This structure is used to share data between the libavcodec library and the client video application...">AVVDPAUContext</a> </p>
<p>Allows extending the struct without breaking API/ABI </p>
</div>
</div>
<a class="anchor" id="ga0a3496e46e9dfcd50f7baa96a9da0275"></a><!-- doxytag: member="vdpau.h::av_vdpau_hwaccel_get_render2" ref="ga0a3496e46e9dfcd50f7baa96a9da0275" args="(const AVVDPAUContext *)" -->
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<td class="memname"><a class="el" href="group__lavc__codec__hwaccel__vdpau.html#ga98e0853e07041294b96e1f4611ad9858">AVVDPAU_Render2</a> <a class="el" href="group__lavc__codec__hwaccel__vdpau.html#ga0a3496e46e9dfcd50f7baa96a9da0275">av_vdpau_hwaccel_get_render2</a> </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="structAVVDPAUContext.html">AVVDPAUContext</a> * </td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
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</div>
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<a class="anchor" id="ga5d993c664b580bb5b927e46c34455cf6"></a><!-- doxytag: member="vdpau.h::av_vdpau_hwaccel_set_render2" ref="ga5d993c664b580bb5b927e46c34455cf6" args="(AVVDPAUContext *, AVVDPAU_Render2)" -->
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<td class="memname">void <a class="el" href="group__lavc__codec__hwaccel__vdpau.html#ga5d993c664b580bb5b927e46c34455cf6">av_vdpau_hwaccel_set_render2</a> </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structAVVDPAUContext.html">AVVDPAUContext</a> * </td>
<td class="paramname">, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group__lavc__codec__hwaccel__vdpau.html#ga98e0853e07041294b96e1f4611ad9858">AVVDPAU_Render2</a> </td>
<td class="paramname"> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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</table>
</div>
<div class="memdoc">
</div>
</div>
<a class="anchor" id="gac56d6b1b4478056afc0e0a8f52271afa"></a><!-- doxytag: member="vdpau.h::av_vdpau_bind_context" ref="gac56d6b1b4478056afc0e0a8f52271afa" args="(AVCodecContext *avctx, VdpDevice device, VdpGetProcAddress *get_proc_address, unsigned flags)" -->
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<td class="memname">int <a class="el" href="group__lavc__codec__hwaccel__vdpau.html#gac56d6b1b4478056afc0e0a8f52271afa">av_vdpau_bind_context</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">VdpDevice </td>
<td class="paramname"><em>device</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">VdpGetProcAddress * </td>
<td class="paramname"><em>get_proc_address</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned </td>
<td class="paramname"><em>flags</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>Associate a VDPAU device with a codec context for hardware acceleration. </p>
<p>This function is meant to be called from the get_format() codec callback, or earlier. It can also be called after <a class="el" href="group__lavc__misc.html#gaf60b0e076f822abcb2700eb601d352a6" title="Reset the internal decoder state / flush internal buffers.">avcodec_flush_buffers()</a> to change the underlying VDPAU device mid-stream (e.g. to recover from non-transparent display preemption).</p>
<dl class="note"><dt><b>Note:</b></dt><dd>get_format() must return AV_PIX_FMT_VDPAU if this function completes successfully.</dd></dl>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">avctx</td><td>decoding context whose get_format() callback is invoked </td></tr>
<tr><td class="paramname">device</td><td>VDPAU device handle to use for hardware acceleration </td></tr>
<tr><td class="paramname">get_proc_address</td><td>VDPAU device driver </td></tr>
<tr><td class="paramname">flags</td><td>zero of more OR'd AV_HWACCEL_FLAG_* flags</td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 on success, an AVERROR code on failure. </dd></dl>
</div>
</div>
<a class="anchor" id="gad4354a22f2f4d44000515e836b7863af"></a><!-- doxytag: member="vdpau.h::av_vdpau_get_surface_parameters" ref="gad4354a22f2f4d44000515e836b7863af" args="(AVCodecContext *avctx, VdpChromaType *type, uint32_t *width, uint32_t *height)" -->
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<td class="memname">int <a class="el" href="group__lavc__codec__hwaccel__vdpau.html#gad4354a22f2f4d44000515e836b7863af">av_vdpau_get_surface_parameters</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">VdpChromaType * </td>
<td class="paramname"><em>type</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint32_t * </td>
<td class="paramname"><em>width</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint32_t * </td>
<td class="paramname"><em>height</em> </td>
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<tr>
<td></td>
<td>)</td>
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<p>Gets the parameters to create an adequate VDPAU video surface for the codec context using VDPAU hardware decoding acceleration. </p>
<dl class="note"><dt><b>Note:</b></dt><dd>Behavior is undefined if the context was not successfully bound to a VDPAU device using <a class="el" href="group__lavc__codec__hwaccel__vdpau.html#gac56d6b1b4478056afc0e0a8f52271afa" title="Associate a VDPAU device with a codec context for hardware acceleration.">av_vdpau_bind_context()</a>.</dd></dl>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">avctx</td><td>the codec context being used for decoding the stream </td></tr>
<tr><td class="paramname">type</td><td>storage space for the VDPAU video surface chroma type (or NULL to ignore) </td></tr>
<tr><td class="paramname">width</td><td>storage space for the VDPAU video surface pixel width (or NULL to ignore) </td></tr>
<tr><td class="paramname">height</td><td>storage space for the VDPAU video surface pixel height (or NULL to ignore)</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="gac3b2e926326d9bc7c4a856304c4bc0f8"></a><!-- doxytag: member="vdpau.h::av_vdpau_alloc_context" ref="gac3b2e926326d9bc7c4a856304c4bc0f8" args="(void)" -->
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<td class="memname"><a class="el" href="structAVVDPAUContext.html">AVVDPAUContext</a>* <a class="el" href="group__lavc__codec__hwaccel__vdpau.html#gac3b2e926326d9bc7c4a856304c4bc0f8">av_vdpau_alloc_context</a> </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td><td>)</td>
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<p>Allocate an <a class="el" href="structAVVDPAUContext.html" title="This structure is used to share data between the libavcodec library and the client video application...">AVVDPAUContext</a>. </p>
<dl class="return"><dt><b>Returns:</b></dt><dd>Newly-allocated <a class="el" href="structAVVDPAUContext.html" title="This structure is used to share data between the libavcodec library and the client video application...">AVVDPAUContext</a> or NULL on failure. </dd></dl>
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<a class="anchor" id="gaa5dd9ae3912059bdb13f88ddfda26657"></a><!-- doxytag: member="vdpau.h::av_vdpau_get_profile" ref="gaa5dd9ae3912059bdb13f88ddfda26657" args="(AVCodecContext *avctx, VdpDecoderProfile *profile)" -->
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<td class="memname">int <a class="el" href="group__lavc__codec__hwaccel__vdpau.html#gaa5dd9ae3912059bdb13f88ddfda26657">av_vdpau_get_profile</a> </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structAVCodecContext.html">AVCodecContext</a> * </td>
<td class="paramname"><em>avctx</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">VdpDecoderProfile * </td>
<td class="paramname"><em>profile</em> </td>
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<td>)</td>
<td></td><td></td>
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<p>Get a decoder profile that should be used for initializing a VDPAU decoder. </p>
<p>Should be called from the <a class="el" href="structAVCodecContext.html#ae85c5a0e81e9f97c063881148edc28b7" title="callback to negotiate the pixelFormat">AVCodecContext.get_format()</a> callback.</p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">avctx</td><td>the codec context being used for decoding the stream </td></tr>
<tr><td class="paramname">profile</td><td>a pointer into which the result will be written on success. The contents of profile are undefined if this function returns an error.</td></tr>
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</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 on success (non-negative), a negative AVERROR on failure. </dd></dl>
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